6135 lines
168 KiB
C
6135 lines
168 KiB
C
/*
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* pmcraid.c -- driver for PMC Sierra MaxRAID controller adapters
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*
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* Written By: Anil Ravindranath<anil_ravindranath@pmc-sierra.com>
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* PMC-Sierra Inc
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*
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* Copyright (C) 2008, 2009 PMC Sierra Inc
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
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* USA
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*
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*/
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/ioport.h>
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#include <linux/delay.h>
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#include <linux/pci.h>
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#include <linux/wait.h>
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#include <linux/spinlock.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <linux/blkdev.h>
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#include <linux/firmware.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/hdreg.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <asm/irq.h>
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#include <asm/processor.h>
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#include <linux/libata.h>
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#include <linux/mutex.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_tcq.h>
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#include <scsi/scsi_eh.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsicam.h>
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#include "pmcraid.h"
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/*
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* Module configuration parameters
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*/
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static unsigned int pmcraid_debug_log;
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static unsigned int pmcraid_disable_aen;
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static unsigned int pmcraid_log_level = IOASC_LOG_LEVEL_MUST;
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static unsigned int pmcraid_enable_msix;
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/*
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* Data structures to support multiple adapters by the LLD.
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* pmcraid_adapter_count - count of configured adapters
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*/
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static atomic_t pmcraid_adapter_count = ATOMIC_INIT(0);
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/*
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* Supporting user-level control interface through IOCTL commands.
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* pmcraid_major - major number to use
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* pmcraid_minor - minor number(s) to use
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*/
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static unsigned int pmcraid_major;
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static struct class *pmcraid_class;
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DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
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/*
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* Module parameters
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*/
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MODULE_AUTHOR("Anil Ravindranath<anil_ravindranath@pmc-sierra.com>");
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MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(PMCRAID_DRIVER_VERSION);
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module_param_named(log_level, pmcraid_log_level, uint, (S_IRUGO | S_IWUSR));
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MODULE_PARM_DESC(log_level,
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"Enables firmware error code logging, default :1 high-severity"
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" errors, 2: all errors including high-severity errors,"
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" 0: disables logging");
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module_param_named(debug, pmcraid_debug_log, uint, (S_IRUGO | S_IWUSR));
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MODULE_PARM_DESC(debug,
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"Enable driver verbose message logging. Set 1 to enable."
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"(default: 0)");
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module_param_named(disable_aen, pmcraid_disable_aen, uint, (S_IRUGO | S_IWUSR));
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MODULE_PARM_DESC(disable_aen,
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"Disable driver aen notifications to apps. Set 1 to disable."
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"(default: 0)");
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/* chip specific constants for PMC MaxRAID controllers (same for
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* 0x5220 and 0x8010
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*/
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static struct pmcraid_chip_details pmcraid_chip_cfg[] = {
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{
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.ioastatus = 0x0,
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.ioarrin = 0x00040,
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.mailbox = 0x7FC30,
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.global_intr_mask = 0x00034,
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.ioa_host_intr = 0x0009C,
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.ioa_host_intr_clr = 0x000A0,
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.ioa_host_msix_intr = 0x7FC40,
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.ioa_host_mask = 0x7FC28,
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.ioa_host_mask_clr = 0x7FC28,
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.host_ioa_intr = 0x00020,
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.host_ioa_intr_clr = 0x00020,
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.transop_timeout = 300
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}
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};
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/*
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* PCI device ids supported by pmcraid driver
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*/
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static struct pci_device_id pmcraid_pci_table[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID),
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0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0]
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},
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{}
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};
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MODULE_DEVICE_TABLE(pci, pmcraid_pci_table);
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/**
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* pmcraid_slave_alloc - Prepare for commands to a device
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* @scsi_dev: scsi device struct
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*
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* This function is called by mid-layer prior to sending any command to the new
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* device. Stores resource entry details of the device in scsi_device struct.
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* Queuecommand uses the resource handle and other details to fill up IOARCB
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* while sending commands to the device.
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*
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* Return value:
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* 0 on success / -ENXIO if device does not exist
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*/
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static int pmcraid_slave_alloc(struct scsi_device *scsi_dev)
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{
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struct pmcraid_resource_entry *temp, *res = NULL;
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struct pmcraid_instance *pinstance;
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u8 target, bus, lun;
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unsigned long lock_flags;
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int rc = -ENXIO;
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u16 fw_version;
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pinstance = shost_priv(scsi_dev->host);
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fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
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/* Driver exposes VSET and GSCSI resources only; all other device types
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* are not exposed. Resource list is synchronized using resource lock
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* so any traversal or modifications to the list should be done inside
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* this lock
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*/
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spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
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list_for_each_entry(temp, &pinstance->used_res_q, queue) {
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/* do not expose VSETs with order-ids > MAX_VSET_TARGETS */
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if (RES_IS_VSET(temp->cfg_entry)) {
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if (fw_version <= PMCRAID_FW_VERSION_1)
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target = temp->cfg_entry.unique_flags1;
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else
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target = temp->cfg_entry.array_id & 0xFF;
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if (target > PMCRAID_MAX_VSET_TARGETS)
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continue;
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bus = PMCRAID_VSET_BUS_ID;
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lun = 0;
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} else if (RES_IS_GSCSI(temp->cfg_entry)) {
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target = RES_TARGET(temp->cfg_entry.resource_address);
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bus = PMCRAID_PHYS_BUS_ID;
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lun = RES_LUN(temp->cfg_entry.resource_address);
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} else {
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continue;
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}
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if (bus == scsi_dev->channel &&
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target == scsi_dev->id &&
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lun == scsi_dev->lun) {
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res = temp;
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break;
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}
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}
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if (res) {
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res->scsi_dev = scsi_dev;
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scsi_dev->hostdata = res;
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res->change_detected = 0;
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atomic_set(&res->read_failures, 0);
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atomic_set(&res->write_failures, 0);
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rc = 0;
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}
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spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
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return rc;
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}
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/**
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* pmcraid_slave_configure - Configures a SCSI device
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* @scsi_dev: scsi device struct
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*
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* This function is executed by SCSI mid layer just after a device is first
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* scanned (i.e. it has responded to an INQUIRY). For VSET resources, the
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* timeout value (default 30s) will be over-written to a higher value (60s)
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* and max_sectors value will be over-written to 512. It also sets queue depth
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* to host->cmd_per_lun value
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*
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* Return value:
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* 0 on success
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*/
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static int pmcraid_slave_configure(struct scsi_device *scsi_dev)
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{
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struct pmcraid_resource_entry *res = scsi_dev->hostdata;
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if (!res)
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return 0;
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/* LLD exposes VSETs and Enclosure devices only */
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if (RES_IS_GSCSI(res->cfg_entry) &&
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scsi_dev->type != TYPE_ENCLOSURE)
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return -ENXIO;
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pmcraid_info("configuring %x:%x:%x:%x\n",
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scsi_dev->host->unique_id,
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scsi_dev->channel,
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scsi_dev->id,
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scsi_dev->lun);
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if (RES_IS_GSCSI(res->cfg_entry)) {
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scsi_dev->allow_restart = 1;
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} else if (RES_IS_VSET(res->cfg_entry)) {
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scsi_dev->allow_restart = 1;
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blk_queue_rq_timeout(scsi_dev->request_queue,
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PMCRAID_VSET_IO_TIMEOUT);
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blk_queue_max_hw_sectors(scsi_dev->request_queue,
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PMCRAID_VSET_MAX_SECTORS);
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}
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if (scsi_dev->tagged_supported &&
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(RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
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scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
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scsi_adjust_queue_depth(scsi_dev, MSG_SIMPLE_TAG,
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scsi_dev->host->cmd_per_lun);
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} else {
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scsi_adjust_queue_depth(scsi_dev, 0,
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scsi_dev->host->cmd_per_lun);
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}
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return 0;
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}
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/**
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* pmcraid_slave_destroy - Unconfigure a SCSI device before removing it
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*
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* @scsi_dev: scsi device struct
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*
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* This is called by mid-layer before removing a device. Pointer assignments
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* done in pmcraid_slave_alloc will be reset to NULL here.
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*
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* Return value
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* none
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*/
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static void pmcraid_slave_destroy(struct scsi_device *scsi_dev)
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{
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struct pmcraid_resource_entry *res;
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res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
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if (res)
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res->scsi_dev = NULL;
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scsi_dev->hostdata = NULL;
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}
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/**
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* pmcraid_change_queue_depth - Change the device's queue depth
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* @scsi_dev: scsi device struct
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* @depth: depth to set
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* @reason: calling context
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*
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* Return value
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* actual depth set
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*/
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static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth,
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int reason)
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{
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if (reason != SCSI_QDEPTH_DEFAULT)
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return -EOPNOTSUPP;
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if (depth > PMCRAID_MAX_CMD_PER_LUN)
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depth = PMCRAID_MAX_CMD_PER_LUN;
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scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev), depth);
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return scsi_dev->queue_depth;
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}
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/**
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* pmcraid_change_queue_type - Change the device's queue type
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* @scsi_dev: scsi device struct
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* @tag: type of tags to use
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*
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* Return value:
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* actual queue type set
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*/
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static int pmcraid_change_queue_type(struct scsi_device *scsi_dev, int tag)
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{
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struct pmcraid_resource_entry *res;
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res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
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if ((res) && scsi_dev->tagged_supported &&
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(RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
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scsi_set_tag_type(scsi_dev, tag);
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if (tag)
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scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
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else
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scsi_deactivate_tcq(scsi_dev, scsi_dev->queue_depth);
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} else
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tag = 0;
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return tag;
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}
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/**
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* pmcraid_init_cmdblk - initializes a command block
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*
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* @cmd: pointer to struct pmcraid_cmd to be initialized
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* @index: if >=0 first time initialization; otherwise reinitialization
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*
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* Return Value
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* None
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*/
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void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index)
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{
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struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
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dma_addr_t dma_addr = cmd->ioa_cb_bus_addr;
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if (index >= 0) {
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/* first time initialization (called from probe) */
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u32 ioasa_offset =
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offsetof(struct pmcraid_control_block, ioasa);
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cmd->index = index;
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ioarcb->response_handle = cpu_to_le32(index << 2);
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ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr);
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ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset);
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ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa));
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} else {
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/* re-initialization of various lengths, called once command is
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* processed by IOA
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*/
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memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN);
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ioarcb->hrrq_id = 0;
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ioarcb->request_flags0 = 0;
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ioarcb->request_flags1 = 0;
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ioarcb->cmd_timeout = 0;
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ioarcb->ioarcb_bus_addr &= (~0x1FULL);
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ioarcb->ioadl_bus_addr = 0;
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ioarcb->ioadl_length = 0;
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ioarcb->data_transfer_length = 0;
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ioarcb->add_cmd_param_length = 0;
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ioarcb->add_cmd_param_offset = 0;
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cmd->ioa_cb->ioasa.ioasc = 0;
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cmd->ioa_cb->ioasa.residual_data_length = 0;
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cmd->time_left = 0;
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}
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cmd->cmd_done = NULL;
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cmd->scsi_cmd = NULL;
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cmd->release = 0;
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cmd->completion_req = 0;
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cmd->sense_buffer = 0;
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cmd->sense_buffer_dma = 0;
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cmd->dma_handle = 0;
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init_timer(&cmd->timer);
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}
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/**
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* pmcraid_reinit_cmdblk - reinitialize a command block
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*
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* @cmd: pointer to struct pmcraid_cmd to be reinitialized
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*
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* Return Value
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* None
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*/
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static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd)
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{
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pmcraid_init_cmdblk(cmd, -1);
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}
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/**
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* pmcraid_get_free_cmd - get a free cmd block from command block pool
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* @pinstance: adapter instance structure
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*
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* Return Value:
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* returns pointer to cmd block or NULL if no blocks are available
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*/
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static struct pmcraid_cmd *pmcraid_get_free_cmd(
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struct pmcraid_instance *pinstance
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)
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{
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struct pmcraid_cmd *cmd = NULL;
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unsigned long lock_flags;
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/* free cmd block list is protected by free_pool_lock */
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spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
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if (!list_empty(&pinstance->free_cmd_pool)) {
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cmd = list_entry(pinstance->free_cmd_pool.next,
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struct pmcraid_cmd, free_list);
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list_del(&cmd->free_list);
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}
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spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
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/* Initialize the command block before giving it the caller */
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if (cmd != NULL)
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pmcraid_reinit_cmdblk(cmd);
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return cmd;
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}
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/**
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* pmcraid_return_cmd - return a completed command block back into free pool
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* @cmd: pointer to the command block
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*
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* Return Value:
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* nothing
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*/
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void pmcraid_return_cmd(struct pmcraid_cmd *cmd)
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{
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struct pmcraid_instance *pinstance = cmd->drv_inst;
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unsigned long lock_flags;
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spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
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list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool);
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spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
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}
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/**
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* pmcraid_read_interrupts - reads IOA interrupts
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*
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* @pinstance: pointer to adapter instance structure
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*
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* Return value
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* interrupts read from IOA
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*/
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static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance)
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{
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return (pinstance->interrupt_mode) ?
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ioread32(pinstance->int_regs.ioa_host_msix_interrupt_reg) :
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ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
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}
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/**
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* pmcraid_disable_interrupts - Masks and clears all specified interrupts
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*
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* @pinstance: pointer to per adapter instance structure
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* @intrs: interrupts to disable
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*
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* Return Value
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* None
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*/
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static void pmcraid_disable_interrupts(
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struct pmcraid_instance *pinstance,
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u32 intrs
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)
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{
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u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
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u32 nmask = gmask | GLOBAL_INTERRUPT_MASK;
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iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg);
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iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
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ioread32(pinstance->int_regs.global_interrupt_mask_reg);
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|
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if (!pinstance->interrupt_mode) {
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iowrite32(intrs,
|
|
pinstance->int_regs.ioa_host_interrupt_mask_reg);
|
|
ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pmcraid_enable_interrupts - Enables specified interrupts
|
|
*
|
|
* @pinstance: pointer to per adapter instance structure
|
|
* @intr: interrupts to enable
|
|
*
|
|
* Return Value
|
|
* None
|
|
*/
|
|
static void pmcraid_enable_interrupts(
|
|
struct pmcraid_instance *pinstance,
|
|
u32 intrs
|
|
)
|
|
{
|
|
u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
|
|
u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK);
|
|
|
|
iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
|
|
|
|
if (!pinstance->interrupt_mode) {
|
|
iowrite32(~intrs,
|
|
pinstance->int_regs.ioa_host_interrupt_mask_reg);
|
|
ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
|
|
}
|
|
|
|
pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n",
|
|
ioread32(pinstance->int_regs.global_interrupt_mask_reg),
|
|
ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg));
|
|
}
|
|
|
|
/**
|
|
* pmcraid_clr_trans_op - clear trans to op interrupt
|
|
*
|
|
* @pinstance: pointer to per adapter instance structure
|
|
*
|
|
* Return Value
|
|
* None
|
|
*/
|
|
static void pmcraid_clr_trans_op(
|
|
struct pmcraid_instance *pinstance
|
|
)
|
|
{
|
|
unsigned long lock_flags;
|
|
|
|
if (!pinstance->interrupt_mode) {
|
|
iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
|
|
pinstance->int_regs.ioa_host_interrupt_mask_reg);
|
|
ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
|
|
iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
|
|
pinstance->int_regs.ioa_host_interrupt_clr_reg);
|
|
ioread32(pinstance->int_regs.ioa_host_interrupt_clr_reg);
|
|
}
|
|
|
|
if (pinstance->reset_cmd != NULL) {
|
|
del_timer(&pinstance->reset_cmd->timer);
|
|
spin_lock_irqsave(
|
|
pinstance->host->host_lock, lock_flags);
|
|
pinstance->reset_cmd->cmd_done(pinstance->reset_cmd);
|
|
spin_unlock_irqrestore(
|
|
pinstance->host->host_lock, lock_flags);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pmcraid_reset_type - Determine the required reset type
|
|
* @pinstance: pointer to adapter instance structure
|
|
*
|
|
* IOA requires hard reset if any of the following conditions is true.
|
|
* 1. If HRRQ valid interrupt is not masked
|
|
* 2. IOA reset alert doorbell is set
|
|
* 3. If there are any error interrupts
|
|
*/
|
|
static void pmcraid_reset_type(struct pmcraid_instance *pinstance)
|
|
{
|
|
u32 mask;
|
|
u32 intrs;
|
|
u32 alerts;
|
|
|
|
mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
|
|
intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
|
|
alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
|
|
|
|
if ((mask & INTRS_HRRQ_VALID) == 0 ||
|
|
(alerts & DOORBELL_IOA_RESET_ALERT) ||
|
|
(intrs & PMCRAID_ERROR_INTERRUPTS)) {
|
|
pmcraid_info("IOA requires hard reset\n");
|
|
pinstance->ioa_hard_reset = 1;
|
|
}
|
|
|
|
/* If unit check is active, trigger the dump */
|
|
if (intrs & INTRS_IOA_UNIT_CHECK)
|
|
pinstance->ioa_unit_check = 1;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_bist_done - completion function for PCI BIST
|
|
* @cmd: pointer to reset command
|
|
* Return Value
|
|
* none
|
|
*/
|
|
|
|
static void pmcraid_ioa_reset(struct pmcraid_cmd *);
|
|
|
|
static void pmcraid_bist_done(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
unsigned long lock_flags;
|
|
int rc;
|
|
u16 pci_reg;
|
|
|
|
rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
|
|
|
|
/* If PCI config space can't be accessed wait for another two secs */
|
|
if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) &&
|
|
cmd->time_left > 0) {
|
|
pmcraid_info("BIST not complete, waiting another 2 secs\n");
|
|
cmd->timer.expires = jiffies + cmd->time_left;
|
|
cmd->time_left = 0;
|
|
cmd->timer.data = (unsigned long)cmd;
|
|
cmd->timer.function =
|
|
(void (*)(unsigned long))pmcraid_bist_done;
|
|
add_timer(&cmd->timer);
|
|
} else {
|
|
cmd->time_left = 0;
|
|
pmcraid_info("BIST is complete, proceeding with reset\n");
|
|
spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
|
pmcraid_ioa_reset(cmd);
|
|
spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pmcraid_start_bist - starts BIST
|
|
* @cmd: pointer to reset cmd
|
|
* Return Value
|
|
* none
|
|
*/
|
|
static void pmcraid_start_bist(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
u32 doorbells, intrs;
|
|
|
|
/* proceed with bist and wait for 2 seconds */
|
|
iowrite32(DOORBELL_IOA_START_BIST,
|
|
pinstance->int_regs.host_ioa_interrupt_reg);
|
|
doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
|
|
intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
|
|
pmcraid_info("doorbells after start bist: %x intrs: %x\n",
|
|
doorbells, intrs);
|
|
|
|
cmd->time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
|
|
cmd->timer.data = (unsigned long)cmd;
|
|
cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
|
|
cmd->timer.function = (void (*)(unsigned long))pmcraid_bist_done;
|
|
add_timer(&cmd->timer);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_reset_alert_done - completion routine for reset_alert
|
|
* @cmd: pointer to command block used in reset sequence
|
|
* Return value
|
|
* None
|
|
*/
|
|
static void pmcraid_reset_alert_done(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
u32 status = ioread32(pinstance->ioa_status);
|
|
unsigned long lock_flags;
|
|
|
|
/* if the critical operation in progress bit is set or the wait times
|
|
* out, invoke reset engine to proceed with hard reset. If there is
|
|
* some more time to wait, restart the timer
|
|
*/
|
|
if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) ||
|
|
cmd->time_left <= 0) {
|
|
pmcraid_info("critical op is reset proceeding with reset\n");
|
|
spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
|
pmcraid_ioa_reset(cmd);
|
|
spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
|
} else {
|
|
pmcraid_info("critical op is not yet reset waiting again\n");
|
|
/* restart timer if some more time is available to wait */
|
|
cmd->time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT;
|
|
cmd->timer.data = (unsigned long)cmd;
|
|
cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
|
|
cmd->timer.function =
|
|
(void (*)(unsigned long))pmcraid_reset_alert_done;
|
|
add_timer(&cmd->timer);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pmcraid_reset_alert - alerts IOA for a possible reset
|
|
* @cmd : command block to be used for reset sequence.
|
|
*
|
|
* Return Value
|
|
* returns 0 if pci config-space is accessible and RESET_DOORBELL is
|
|
* successfully written to IOA. Returns non-zero in case pci_config_space
|
|
* is not accessible
|
|
*/
|
|
static void pmcraid_notify_ioastate(struct pmcraid_instance *, u32);
|
|
static void pmcraid_reset_alert(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
u32 doorbells;
|
|
int rc;
|
|
u16 pci_reg;
|
|
|
|
/* If we are able to access IOA PCI config space, alert IOA that we are
|
|
* going to reset it soon. This enables IOA to preserv persistent error
|
|
* data if any. In case memory space is not accessible, proceed with
|
|
* BIST or slot_reset
|
|
*/
|
|
rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
|
|
if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) {
|
|
|
|
/* wait for IOA permission i.e until CRITICAL_OPERATION bit is
|
|
* reset IOA doesn't generate any interrupts when CRITICAL
|
|
* OPERATION bit is reset. A timer is started to wait for this
|
|
* bit to be reset.
|
|
*/
|
|
cmd->time_left = PMCRAID_RESET_TIMEOUT;
|
|
cmd->timer.data = (unsigned long)cmd;
|
|
cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
|
|
cmd->timer.function =
|
|
(void (*)(unsigned long))pmcraid_reset_alert_done;
|
|
add_timer(&cmd->timer);
|
|
|
|
iowrite32(DOORBELL_IOA_RESET_ALERT,
|
|
pinstance->int_regs.host_ioa_interrupt_reg);
|
|
doorbells =
|
|
ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
|
|
pmcraid_info("doorbells after reset alert: %x\n", doorbells);
|
|
} else {
|
|
pmcraid_info("PCI config is not accessible starting BIST\n");
|
|
pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
|
|
pmcraid_start_bist(cmd);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pmcraid_timeout_handler - Timeout handler for internally generated ops
|
|
*
|
|
* @cmd : pointer to command structure, that got timedout
|
|
*
|
|
* This function blocks host requests and initiates an adapter reset.
|
|
*
|
|
* Return value:
|
|
* None
|
|
*/
|
|
static void pmcraid_timeout_handler(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
unsigned long lock_flags;
|
|
|
|
dev_info(&pinstance->pdev->dev,
|
|
"Adapter being reset due to cmd(CDB[0] = %x) timeout\n",
|
|
cmd->ioa_cb->ioarcb.cdb[0]);
|
|
|
|
/* Command timeouts result in hard reset sequence. The command that got
|
|
* timed out may be the one used as part of reset sequence. In this
|
|
* case restart reset sequence using the same command block even if
|
|
* reset is in progress. Otherwise fail this command and get a free
|
|
* command block to restart the reset sequence.
|
|
*/
|
|
spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
|
if (!pinstance->ioa_reset_in_progress) {
|
|
pinstance->ioa_reset_attempts = 0;
|
|
cmd = pmcraid_get_free_cmd(pinstance);
|
|
|
|
/* If we are out of command blocks, just return here itself.
|
|
* Some other command's timeout handler can do the reset job
|
|
*/
|
|
if (cmd == NULL) {
|
|
spin_unlock_irqrestore(pinstance->host->host_lock,
|
|
lock_flags);
|
|
pmcraid_err("no free cmnd block for timeout handler\n");
|
|
return;
|
|
}
|
|
|
|
pinstance->reset_cmd = cmd;
|
|
pinstance->ioa_reset_in_progress = 1;
|
|
} else {
|
|
pmcraid_info("reset is already in progress\n");
|
|
|
|
if (pinstance->reset_cmd != cmd) {
|
|
/* This command should have been given to IOA, this
|
|
* command will be completed by fail_outstanding_cmds
|
|
* anyway
|
|
*/
|
|
pmcraid_err("cmd is pending but reset in progress\n");
|
|
}
|
|
|
|
/* If this command was being used as part of the reset
|
|
* sequence, set cmd_done pointer to pmcraid_ioa_reset. This
|
|
* causes fail_outstanding_commands not to return the command
|
|
* block back to free pool
|
|
*/
|
|
if (cmd == pinstance->reset_cmd)
|
|
cmd->cmd_done = pmcraid_ioa_reset;
|
|
}
|
|
|
|
/* Notify apps of important IOA bringup/bringdown sequences */
|
|
if (pinstance->scn.ioa_state != PMC_DEVICE_EVENT_RESET_START &&
|
|
pinstance->scn.ioa_state != PMC_DEVICE_EVENT_SHUTDOWN_START)
|
|
pmcraid_notify_ioastate(pinstance,
|
|
PMC_DEVICE_EVENT_RESET_START);
|
|
|
|
pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
|
|
scsi_block_requests(pinstance->host);
|
|
pmcraid_reset_alert(cmd);
|
|
spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_internal_done - completion routine for internally generated cmds
|
|
*
|
|
* @cmd: command that got response from IOA
|
|
*
|
|
* Return Value:
|
|
* none
|
|
*/
|
|
static void pmcraid_internal_done(struct pmcraid_cmd *cmd)
|
|
{
|
|
pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
|
|
cmd->ioa_cb->ioarcb.cdb[0],
|
|
le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
|
|
|
|
/* Some of the internal commands are sent with callers blocking for the
|
|
* response. Same will be indicated as part of cmd->completion_req
|
|
* field. Response path needs to wake up any waiters waiting for cmd
|
|
* completion if this flag is set.
|
|
*/
|
|
if (cmd->completion_req) {
|
|
cmd->completion_req = 0;
|
|
complete(&cmd->wait_for_completion);
|
|
}
|
|
|
|
/* most of the internal commands are completed by caller itself, so
|
|
* no need to return the command block back to free pool until we are
|
|
* required to do so (e.g once done with initialization).
|
|
*/
|
|
if (cmd->release) {
|
|
cmd->release = 0;
|
|
pmcraid_return_cmd(cmd);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization
|
|
*
|
|
* @cmd: command that got response from IOA
|
|
*
|
|
* This routine is called after driver re-reads configuration table due to a
|
|
* lost CCN. It returns the command block back to free pool and schedules
|
|
* worker thread to add/delete devices into the system.
|
|
*
|
|
* Return Value:
|
|
* none
|
|
*/
|
|
static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd)
|
|
{
|
|
pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
|
|
cmd->ioa_cb->ioarcb.cdb[0],
|
|
le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
|
|
|
|
if (cmd->release) {
|
|
cmd->release = 0;
|
|
pmcraid_return_cmd(cmd);
|
|
}
|
|
pmcraid_info("scheduling worker for config table reinitialization\n");
|
|
schedule_work(&cmd->drv_inst->worker_q);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_erp_done - Process completion of SCSI error response from device
|
|
* @cmd: pmcraid_command
|
|
*
|
|
* This function copies the sense buffer into the scsi_cmd struct and completes
|
|
* scsi_cmd by calling scsi_done function.
|
|
*
|
|
* Return value:
|
|
* none
|
|
*/
|
|
static void pmcraid_erp_done(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
|
|
|
|
if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) {
|
|
scsi_cmd->result |= (DID_ERROR << 16);
|
|
scmd_printk(KERN_INFO, scsi_cmd,
|
|
"command CDB[0] = %x failed with IOASC: 0x%08X\n",
|
|
cmd->ioa_cb->ioarcb.cdb[0], ioasc);
|
|
}
|
|
|
|
/* if we had allocated sense buffers for request sense, copy the sense
|
|
* release the buffers
|
|
*/
|
|
if (cmd->sense_buffer != NULL) {
|
|
memcpy(scsi_cmd->sense_buffer,
|
|
cmd->sense_buffer,
|
|
SCSI_SENSE_BUFFERSIZE);
|
|
pci_free_consistent(pinstance->pdev,
|
|
SCSI_SENSE_BUFFERSIZE,
|
|
cmd->sense_buffer, cmd->sense_buffer_dma);
|
|
cmd->sense_buffer = NULL;
|
|
cmd->sense_buffer_dma = 0;
|
|
}
|
|
|
|
scsi_dma_unmap(scsi_cmd);
|
|
pmcraid_return_cmd(cmd);
|
|
scsi_cmd->scsi_done(scsi_cmd);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_fire_command - sends an IOA command to adapter
|
|
*
|
|
* This function adds the given block into pending command list
|
|
* and returns without waiting
|
|
*
|
|
* @cmd : command to be sent to the device
|
|
*
|
|
* Return Value
|
|
* None
|
|
*/
|
|
static void _pmcraid_fire_command(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
unsigned long lock_flags;
|
|
|
|
/* Add this command block to pending cmd pool. We do this prior to
|
|
* writting IOARCB to ioarrin because IOA might complete the command
|
|
* by the time we are about to add it to the list. Response handler
|
|
* (isr/tasklet) looks for cmd block in the pending pending list.
|
|
*/
|
|
spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
|
|
list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool);
|
|
spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
|
|
atomic_inc(&pinstance->outstanding_cmds);
|
|
|
|
/* driver writes lower 32-bit value of IOARCB address only */
|
|
mb();
|
|
iowrite32(le32_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr),
|
|
pinstance->ioarrin);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_send_cmd - fires a command to IOA
|
|
*
|
|
* This function also sets up timeout function, and command completion
|
|
* function
|
|
*
|
|
* @cmd: pointer to the command block to be fired to IOA
|
|
* @cmd_done: command completion function, called once IOA responds
|
|
* @timeout: timeout to wait for this command completion
|
|
* @timeout_func: timeout handler
|
|
*
|
|
* Return value
|
|
* none
|
|
*/
|
|
static void pmcraid_send_cmd(
|
|
struct pmcraid_cmd *cmd,
|
|
void (*cmd_done) (struct pmcraid_cmd *),
|
|
unsigned long timeout,
|
|
void (*timeout_func) (struct pmcraid_cmd *)
|
|
)
|
|
{
|
|
/* initialize done function */
|
|
cmd->cmd_done = cmd_done;
|
|
|
|
if (timeout_func) {
|
|
/* setup timeout handler */
|
|
cmd->timer.data = (unsigned long)cmd;
|
|
cmd->timer.expires = jiffies + timeout;
|
|
cmd->timer.function = (void (*)(unsigned long))timeout_func;
|
|
add_timer(&cmd->timer);
|
|
}
|
|
|
|
/* fire the command to IOA */
|
|
_pmcraid_fire_command(cmd);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_ioa_shutdown_done - completion function for IOA shutdown command
|
|
* @cmd: pointer to the command block used for sending IOA shutdown command
|
|
*
|
|
* Return value
|
|
* None
|
|
*/
|
|
static void pmcraid_ioa_shutdown_done(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
unsigned long lock_flags;
|
|
|
|
spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
|
pmcraid_ioa_reset(cmd);
|
|
spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa
|
|
*
|
|
* @cmd: pointer to the command block used as part of reset sequence
|
|
*
|
|
* Return Value
|
|
* None
|
|
*/
|
|
static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd)
|
|
{
|
|
pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n",
|
|
cmd->ioa_cb->ioarcb.cdb[0],
|
|
le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
|
|
|
|
/* Note that commands sent during reset require next command to be sent
|
|
* to IOA. Hence reinit the done function as well as timeout function
|
|
*/
|
|
pmcraid_reinit_cmdblk(cmd);
|
|
cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD;
|
|
cmd->ioa_cb->ioarcb.resource_handle =
|
|
cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
|
|
cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN;
|
|
cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL;
|
|
|
|
/* fire shutdown command to hardware. */
|
|
pmcraid_info("firing normal shutdown command (%d) to IOA\n",
|
|
le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle));
|
|
|
|
pmcraid_notify_ioastate(cmd->drv_inst, PMC_DEVICE_EVENT_SHUTDOWN_START);
|
|
|
|
pmcraid_send_cmd(cmd, pmcraid_ioa_shutdown_done,
|
|
PMCRAID_SHUTDOWN_TIMEOUT,
|
|
pmcraid_timeout_handler);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_get_fwversion_done - completion function for get_fwversion
|
|
*
|
|
* @cmd: pointer to command block used to send INQUIRY command
|
|
*
|
|
* Return Value
|
|
* none
|
|
*/
|
|
static void pmcraid_querycfg(struct pmcraid_cmd *);
|
|
|
|
static void pmcraid_get_fwversion_done(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
|
|
unsigned long lock_flags;
|
|
|
|
/* configuration table entry size depends on firmware version. If fw
|
|
* version is not known, it is not possible to interpret IOA config
|
|
* table
|
|
*/
|
|
if (ioasc) {
|
|
pmcraid_err("IOA Inquiry failed with %x\n", ioasc);
|
|
spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
|
pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
|
|
pmcraid_reset_alert(cmd);
|
|
spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
|
} else {
|
|
pmcraid_querycfg(cmd);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pmcraid_get_fwversion - reads firmware version information
|
|
*
|
|
* @cmd: pointer to command block used to send INQUIRY command
|
|
*
|
|
* Return Value
|
|
* none
|
|
*/
|
|
static void pmcraid_get_fwversion(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
|
struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
u16 data_size = sizeof(struct pmcraid_inquiry_data);
|
|
|
|
pmcraid_reinit_cmdblk(cmd);
|
|
ioarcb->request_type = REQ_TYPE_SCSI;
|
|
ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
|
|
ioarcb->cdb[0] = INQUIRY;
|
|
ioarcb->cdb[1] = 1;
|
|
ioarcb->cdb[2] = 0xD0;
|
|
ioarcb->cdb[3] = (data_size >> 8) & 0xFF;
|
|
ioarcb->cdb[4] = data_size & 0xFF;
|
|
|
|
/* Since entire inquiry data it can be part of IOARCB itself
|
|
*/
|
|
ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
|
|
offsetof(struct pmcraid_ioarcb,
|
|
add_data.u.ioadl[0]));
|
|
ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
|
|
ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
|
|
|
|
ioarcb->request_flags0 |= NO_LINK_DESCS;
|
|
ioarcb->data_transfer_length = cpu_to_le32(data_size);
|
|
ioadl = &(ioarcb->add_data.u.ioadl[0]);
|
|
ioadl->flags = IOADL_FLAGS_LAST_DESC;
|
|
ioadl->address = cpu_to_le64(pinstance->inq_data_baddr);
|
|
ioadl->data_len = cpu_to_le32(data_size);
|
|
|
|
pmcraid_send_cmd(cmd, pmcraid_get_fwversion_done,
|
|
PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_identify_hrrq - registers host rrq buffers with IOA
|
|
* @cmd: pointer to command block to be used for identify hrrq
|
|
*
|
|
* Return Value
|
|
* none
|
|
*/
|
|
static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
|
int index = cmd->hrrq_index;
|
|
__be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]);
|
|
u32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD);
|
|
void (*done_function)(struct pmcraid_cmd *);
|
|
|
|
pmcraid_reinit_cmdblk(cmd);
|
|
cmd->hrrq_index = index + 1;
|
|
|
|
if (cmd->hrrq_index < pinstance->num_hrrq) {
|
|
done_function = pmcraid_identify_hrrq;
|
|
} else {
|
|
cmd->hrrq_index = 0;
|
|
done_function = pmcraid_get_fwversion;
|
|
}
|
|
|
|
/* Initialize ioarcb */
|
|
ioarcb->request_type = REQ_TYPE_IOACMD;
|
|
ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
|
|
|
|
/* initialize the hrrq number where IOA will respond to this command */
|
|
ioarcb->hrrq_id = index;
|
|
ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ;
|
|
ioarcb->cdb[1] = index;
|
|
|
|
/* IOA expects 64-bit pci address to be written in B.E format
|
|
* (i.e cdb[2]=MSByte..cdb[9]=LSB.
|
|
*/
|
|
pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb:index => %llx:%llx:%x\n",
|
|
hrrq_addr, ioarcb->ioarcb_bus_addr, index);
|
|
|
|
memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr));
|
|
memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size));
|
|
|
|
/* Subsequent commands require HRRQ identification to be successful.
|
|
* Note that this gets called even during reset from SCSI mid-layer
|
|
* or tasklet
|
|
*/
|
|
pmcraid_send_cmd(cmd, done_function,
|
|
PMCRAID_INTERNAL_TIMEOUT,
|
|
pmcraid_timeout_handler);
|
|
}
|
|
|
|
static void pmcraid_process_ccn(struct pmcraid_cmd *cmd);
|
|
static void pmcraid_process_ldn(struct pmcraid_cmd *cmd);
|
|
|
|
/**
|
|
* pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA
|
|
*
|
|
* @cmd: initialized command block pointer
|
|
*
|
|
* Return Value
|
|
* none
|
|
*/
|
|
static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd)
|
|
{
|
|
if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE)
|
|
atomic_set(&(cmd->drv_inst->ccn.ignore), 0);
|
|
else
|
|
atomic_set(&(cmd->drv_inst->ldn.ignore), 0);
|
|
|
|
pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_init_hcam - send an initialized command block(HCAM) to IOA
|
|
*
|
|
* @pinstance: pointer to adapter instance structure
|
|
* @type: HCAM type
|
|
*
|
|
* Return Value
|
|
* pointer to initialized pmcraid_cmd structure or NULL
|
|
*/
|
|
static struct pmcraid_cmd *pmcraid_init_hcam
|
|
(
|
|
struct pmcraid_instance *pinstance,
|
|
u8 type
|
|
)
|
|
{
|
|
struct pmcraid_cmd *cmd;
|
|
struct pmcraid_ioarcb *ioarcb;
|
|
struct pmcraid_ioadl_desc *ioadl;
|
|
struct pmcraid_hostrcb *hcam;
|
|
void (*cmd_done) (struct pmcraid_cmd *);
|
|
dma_addr_t dma;
|
|
int rcb_size;
|
|
|
|
cmd = pmcraid_get_free_cmd(pinstance);
|
|
|
|
if (!cmd) {
|
|
pmcraid_err("no free command blocks for hcam\n");
|
|
return cmd;
|
|
}
|
|
|
|
if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) {
|
|
rcb_size = sizeof(struct pmcraid_hcam_ccn_ext);
|
|
cmd_done = pmcraid_process_ccn;
|
|
dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE;
|
|
hcam = &pinstance->ccn;
|
|
} else {
|
|
rcb_size = sizeof(struct pmcraid_hcam_ldn);
|
|
cmd_done = pmcraid_process_ldn;
|
|
dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE;
|
|
hcam = &pinstance->ldn;
|
|
}
|
|
|
|
/* initialize command pointer used for HCAM registration */
|
|
hcam->cmd = cmd;
|
|
|
|
ioarcb = &cmd->ioa_cb->ioarcb;
|
|
ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
|
|
offsetof(struct pmcraid_ioarcb,
|
|
add_data.u.ioadl[0]));
|
|
ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
|
|
ioadl = ioarcb->add_data.u.ioadl;
|
|
|
|
/* Initialize ioarcb */
|
|
ioarcb->request_type = REQ_TYPE_HCAM;
|
|
ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
|
|
ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC;
|
|
ioarcb->cdb[1] = type;
|
|
ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF;
|
|
ioarcb->cdb[8] = (rcb_size) & 0xFF;
|
|
|
|
ioarcb->data_transfer_length = cpu_to_le32(rcb_size);
|
|
|
|
ioadl[0].flags |= IOADL_FLAGS_READ_LAST;
|
|
ioadl[0].data_len = cpu_to_le32(rcb_size);
|
|
ioadl[0].address = cpu_to_le32(dma);
|
|
|
|
cmd->cmd_done = cmd_done;
|
|
return cmd;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_send_hcam - Send an HCAM to IOA
|
|
* @pinstance: ioa config struct
|
|
* @type: HCAM type
|
|
*
|
|
* This function will send a Host Controlled Async command to IOA.
|
|
*
|
|
* Return value:
|
|
* none
|
|
*/
|
|
static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type)
|
|
{
|
|
struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type);
|
|
pmcraid_send_hcam_cmd(cmd);
|
|
}
|
|
|
|
|
|
/**
|
|
* pmcraid_prepare_cancel_cmd - prepares a command block to abort another
|
|
*
|
|
* @cmd: pointer to cmd that is used as cancelling command
|
|
* @cmd_to_cancel: pointer to the command that needs to be cancelled
|
|
*/
|
|
static void pmcraid_prepare_cancel_cmd(
|
|
struct pmcraid_cmd *cmd,
|
|
struct pmcraid_cmd *cmd_to_cancel
|
|
)
|
|
{
|
|
struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
|
__be64 ioarcb_addr = cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr;
|
|
|
|
/* Get the resource handle to where the command to be aborted has been
|
|
* sent.
|
|
*/
|
|
ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle;
|
|
ioarcb->request_type = REQ_TYPE_IOACMD;
|
|
memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
|
|
ioarcb->cdb[0] = PMCRAID_ABORT_CMD;
|
|
|
|
/* IOARCB address of the command to be cancelled is given in
|
|
* cdb[2]..cdb[9] is Big-Endian format. Note that length bits in
|
|
* IOARCB address are not masked.
|
|
*/
|
|
ioarcb_addr = cpu_to_be64(ioarcb_addr);
|
|
memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr));
|
|
}
|
|
|
|
/**
|
|
* pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM
|
|
*
|
|
* @cmd: command to be used as cancelling command
|
|
* @type: HCAM type
|
|
* @cmd_done: op done function for the cancelling command
|
|
*/
|
|
static void pmcraid_cancel_hcam(
|
|
struct pmcraid_cmd *cmd,
|
|
u8 type,
|
|
void (*cmd_done) (struct pmcraid_cmd *)
|
|
)
|
|
{
|
|
struct pmcraid_instance *pinstance;
|
|
struct pmcraid_hostrcb *hcam;
|
|
|
|
pinstance = cmd->drv_inst;
|
|
hcam = (type == PMCRAID_HCAM_CODE_LOG_DATA) ?
|
|
&pinstance->ldn : &pinstance->ccn;
|
|
|
|
/* prepare for cancelling previous hcam command. If the HCAM is
|
|
* currently not pending with IOA, we would have hcam->cmd as non-null
|
|
*/
|
|
if (hcam->cmd == NULL)
|
|
return;
|
|
|
|
pmcraid_prepare_cancel_cmd(cmd, hcam->cmd);
|
|
|
|
/* writing to IOARRIN must be protected by host_lock, as mid-layer
|
|
* schedule queuecommand while we are doing this
|
|
*/
|
|
pmcraid_send_cmd(cmd, cmd_done,
|
|
PMCRAID_INTERNAL_TIMEOUT,
|
|
pmcraid_timeout_handler);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA
|
|
*
|
|
* @cmd: command block to be used for cancelling the HCAM
|
|
*/
|
|
static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd)
|
|
{
|
|
pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n",
|
|
cmd->ioa_cb->ioarcb.cdb[0],
|
|
le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
|
|
|
|
pmcraid_reinit_cmdblk(cmd);
|
|
|
|
pmcraid_cancel_hcam(cmd,
|
|
PMCRAID_HCAM_CODE_CONFIG_CHANGE,
|
|
pmcraid_ioa_shutdown);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA
|
|
*
|
|
* @cmd: command block to be used for cancelling the HCAM
|
|
*/
|
|
static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd)
|
|
{
|
|
pmcraid_cancel_hcam(cmd,
|
|
PMCRAID_HCAM_CODE_LOG_DATA,
|
|
pmcraid_cancel_ccn);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_expose_resource - check if the resource can be exposed to OS
|
|
*
|
|
* @fw_version: firmware version code
|
|
* @cfgte: pointer to configuration table entry of the resource
|
|
*
|
|
* Return value:
|
|
* true if resource can be added to midlayer, false(0) otherwise
|
|
*/
|
|
static int pmcraid_expose_resource(u16 fw_version,
|
|
struct pmcraid_config_table_entry *cfgte)
|
|
{
|
|
int retval = 0;
|
|
|
|
if (cfgte->resource_type == RES_TYPE_VSET) {
|
|
if (fw_version <= PMCRAID_FW_VERSION_1)
|
|
retval = ((cfgte->unique_flags1 & 0x80) == 0);
|
|
else
|
|
retval = ((cfgte->unique_flags0 & 0x80) == 0 &&
|
|
(cfgte->unique_flags1 & 0x80) == 0);
|
|
|
|
} else if (cfgte->resource_type == RES_TYPE_GSCSI)
|
|
retval = (RES_BUS(cfgte->resource_address) !=
|
|
PMCRAID_VIRTUAL_ENCL_BUS_ID);
|
|
return retval;
|
|
}
|
|
|
|
/* attributes supported by pmcraid_event_family */
|
|
enum {
|
|
PMCRAID_AEN_ATTR_UNSPEC,
|
|
PMCRAID_AEN_ATTR_EVENT,
|
|
__PMCRAID_AEN_ATTR_MAX,
|
|
};
|
|
#define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1)
|
|
|
|
/* commands supported by pmcraid_event_family */
|
|
enum {
|
|
PMCRAID_AEN_CMD_UNSPEC,
|
|
PMCRAID_AEN_CMD_EVENT,
|
|
__PMCRAID_AEN_CMD_MAX,
|
|
};
|
|
#define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1)
|
|
|
|
static struct genl_family pmcraid_event_family = {
|
|
.id = GENL_ID_GENERATE,
|
|
.name = "pmcraid",
|
|
.version = 1,
|
|
.maxattr = PMCRAID_AEN_ATTR_MAX
|
|
};
|
|
|
|
/**
|
|
* pmcraid_netlink_init - registers pmcraid_event_family
|
|
*
|
|
* Return value:
|
|
* 0 if the pmcraid_event_family is successfully registered
|
|
* with netlink generic, non-zero otherwise
|
|
*/
|
|
static int pmcraid_netlink_init(void)
|
|
{
|
|
int result;
|
|
|
|
result = genl_register_family(&pmcraid_event_family);
|
|
|
|
if (result)
|
|
return result;
|
|
|
|
pmcraid_info("registered NETLINK GENERIC group: %d\n",
|
|
pmcraid_event_family.id);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_netlink_release - unregisters pmcraid_event_family
|
|
*
|
|
* Return value:
|
|
* none
|
|
*/
|
|
static void pmcraid_netlink_release(void)
|
|
{
|
|
genl_unregister_family(&pmcraid_event_family);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_notify_aen - sends event msg to user space application
|
|
* @pinstance: pointer to adapter instance structure
|
|
* @type: HCAM type
|
|
*
|
|
* Return value:
|
|
* 0 if success, error value in case of any failure.
|
|
*/
|
|
static int pmcraid_notify_aen(
|
|
struct pmcraid_instance *pinstance,
|
|
struct pmcraid_aen_msg *aen_msg,
|
|
u32 data_size
|
|
)
|
|
{
|
|
struct sk_buff *skb;
|
|
void *msg_header;
|
|
u32 total_size, nla_genl_hdr_total_size;
|
|
int result;
|
|
|
|
aen_msg->hostno = (pinstance->host->unique_id << 16 |
|
|
MINOR(pinstance->cdev.dev));
|
|
aen_msg->length = data_size;
|
|
|
|
data_size += sizeof(*aen_msg);
|
|
|
|
total_size = nla_total_size(data_size);
|
|
/* Add GENL_HDR to total_size */
|
|
nla_genl_hdr_total_size =
|
|
(total_size + (GENL_HDRLEN +
|
|
((struct genl_family *)&pmcraid_event_family)->hdrsize)
|
|
+ NLMSG_HDRLEN);
|
|
skb = genlmsg_new(nla_genl_hdr_total_size, GFP_ATOMIC);
|
|
|
|
|
|
if (!skb) {
|
|
pmcraid_err("Failed to allocate aen data SKB of size: %x\n",
|
|
total_size);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* add the genetlink message header */
|
|
msg_header = genlmsg_put(skb, 0, 0,
|
|
&pmcraid_event_family, 0,
|
|
PMCRAID_AEN_CMD_EVENT);
|
|
if (!msg_header) {
|
|
pmcraid_err("failed to copy command details\n");
|
|
nlmsg_free(skb);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg);
|
|
|
|
if (result) {
|
|
pmcraid_err("failed to copy AEN attribute data\n");
|
|
nlmsg_free(skb);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* send genetlink multicast message to notify appplications */
|
|
result = genlmsg_end(skb, msg_header);
|
|
|
|
if (result < 0) {
|
|
pmcraid_err("genlmsg_end failed\n");
|
|
nlmsg_free(skb);
|
|
return result;
|
|
}
|
|
|
|
result =
|
|
genlmsg_multicast(skb, 0, pmcraid_event_family.id, GFP_ATOMIC);
|
|
|
|
/* If there are no listeners, genlmsg_multicast may return non-zero
|
|
* value.
|
|
*/
|
|
if (result)
|
|
pmcraid_info("error (%x) sending aen event message\n", result);
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_notify_ccn - notifies about CCN event msg to user space
|
|
* @pinstance: pointer adapter instance structure
|
|
*
|
|
* Return value:
|
|
* 0 if success, error value in case of any failure
|
|
*/
|
|
static int pmcraid_notify_ccn(struct pmcraid_instance *pinstance)
|
|
{
|
|
return pmcraid_notify_aen(pinstance,
|
|
pinstance->ccn.msg,
|
|
pinstance->ccn.hcam->data_len +
|
|
sizeof(struct pmcraid_hcam_hdr));
|
|
}
|
|
|
|
/**
|
|
* pmcraid_notify_ldn - notifies about CCN event msg to user space
|
|
* @pinstance: pointer adapter instance structure
|
|
*
|
|
* Return value:
|
|
* 0 if success, error value in case of any failure
|
|
*/
|
|
static int pmcraid_notify_ldn(struct pmcraid_instance *pinstance)
|
|
{
|
|
return pmcraid_notify_aen(pinstance,
|
|
pinstance->ldn.msg,
|
|
pinstance->ldn.hcam->data_len +
|
|
sizeof(struct pmcraid_hcam_hdr));
|
|
}
|
|
|
|
/**
|
|
* pmcraid_notify_ioastate - sends IOA state event msg to user space
|
|
* @pinstance: pointer adapter instance structure
|
|
* @evt: controller state event to be sent
|
|
*
|
|
* Return value:
|
|
* 0 if success, error value in case of any failure
|
|
*/
|
|
static void pmcraid_notify_ioastate(struct pmcraid_instance *pinstance, u32 evt)
|
|
{
|
|
pinstance->scn.ioa_state = evt;
|
|
pmcraid_notify_aen(pinstance,
|
|
&pinstance->scn.msg,
|
|
sizeof(u32));
|
|
}
|
|
|
|
/**
|
|
* pmcraid_handle_config_change - Handle a config change from the adapter
|
|
* @pinstance: pointer to per adapter instance structure
|
|
*
|
|
* Return value:
|
|
* none
|
|
*/
|
|
|
|
static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance)
|
|
{
|
|
struct pmcraid_config_table_entry *cfg_entry;
|
|
struct pmcraid_hcam_ccn *ccn_hcam;
|
|
struct pmcraid_cmd *cmd;
|
|
struct pmcraid_cmd *cfgcmd;
|
|
struct pmcraid_resource_entry *res = NULL;
|
|
unsigned long lock_flags;
|
|
unsigned long host_lock_flags;
|
|
u32 new_entry = 1;
|
|
u32 hidden_entry = 0;
|
|
u16 fw_version;
|
|
int rc;
|
|
|
|
ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam;
|
|
cfg_entry = &ccn_hcam->cfg_entry;
|
|
fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
|
|
|
|
pmcraid_info("CCN(%x): %x timestamp: %llx type: %x lost: %x flags: %x \
|
|
res: %x:%x:%x:%x\n",
|
|
pinstance->ccn.hcam->ilid,
|
|
pinstance->ccn.hcam->op_code,
|
|
((pinstance->ccn.hcam->timestamp1) |
|
|
((pinstance->ccn.hcam->timestamp2 & 0xffffffffLL) << 32)),
|
|
pinstance->ccn.hcam->notification_type,
|
|
pinstance->ccn.hcam->notification_lost,
|
|
pinstance->ccn.hcam->flags,
|
|
pinstance->host->unique_id,
|
|
RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID :
|
|
(RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID :
|
|
RES_BUS(cfg_entry->resource_address)),
|
|
RES_IS_VSET(*cfg_entry) ?
|
|
(fw_version <= PMCRAID_FW_VERSION_1 ?
|
|
cfg_entry->unique_flags1 :
|
|
cfg_entry->array_id & 0xFF) :
|
|
RES_TARGET(cfg_entry->resource_address),
|
|
RES_LUN(cfg_entry->resource_address));
|
|
|
|
|
|
/* If this HCAM indicates a lost notification, read the config table */
|
|
if (pinstance->ccn.hcam->notification_lost) {
|
|
cfgcmd = pmcraid_get_free_cmd(pinstance);
|
|
if (cfgcmd) {
|
|
pmcraid_info("lost CCN, reading config table\b");
|
|
pinstance->reinit_cfg_table = 1;
|
|
pmcraid_querycfg(cfgcmd);
|
|
} else {
|
|
pmcraid_err("lost CCN, no free cmd for querycfg\n");
|
|
}
|
|
goto out_notify_apps;
|
|
}
|
|
|
|
/* If this resource is not going to be added to mid-layer, just notify
|
|
* applications and return. If this notification is about hiding a VSET
|
|
* resource, check if it was exposed already.
|
|
*/
|
|
if (pinstance->ccn.hcam->notification_type ==
|
|
NOTIFICATION_TYPE_ENTRY_CHANGED &&
|
|
cfg_entry->resource_type == RES_TYPE_VSET) {
|
|
|
|
if (fw_version <= PMCRAID_FW_VERSION_1)
|
|
hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
|
|
else
|
|
hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
|
|
|
|
} else if (!pmcraid_expose_resource(fw_version, cfg_entry)) {
|
|
goto out_notify_apps;
|
|
}
|
|
|
|
spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
|
|
list_for_each_entry(res, &pinstance->used_res_q, queue) {
|
|
rc = memcmp(&res->cfg_entry.resource_address,
|
|
&cfg_entry->resource_address,
|
|
sizeof(cfg_entry->resource_address));
|
|
if (!rc) {
|
|
new_entry = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (new_entry) {
|
|
|
|
if (hidden_entry) {
|
|
spin_unlock_irqrestore(&pinstance->resource_lock,
|
|
lock_flags);
|
|
goto out_notify_apps;
|
|
}
|
|
|
|
/* If there are more number of resources than what driver can
|
|
* manage, do not notify the applications about the CCN. Just
|
|
* ignore this notifications and re-register the same HCAM
|
|
*/
|
|
if (list_empty(&pinstance->free_res_q)) {
|
|
spin_unlock_irqrestore(&pinstance->resource_lock,
|
|
lock_flags);
|
|
pmcraid_err("too many resources attached\n");
|
|
spin_lock_irqsave(pinstance->host->host_lock,
|
|
host_lock_flags);
|
|
pmcraid_send_hcam(pinstance,
|
|
PMCRAID_HCAM_CODE_CONFIG_CHANGE);
|
|
spin_unlock_irqrestore(pinstance->host->host_lock,
|
|
host_lock_flags);
|
|
return;
|
|
}
|
|
|
|
res = list_entry(pinstance->free_res_q.next,
|
|
struct pmcraid_resource_entry, queue);
|
|
|
|
list_del(&res->queue);
|
|
res->scsi_dev = NULL;
|
|
res->reset_progress = 0;
|
|
list_add_tail(&res->queue, &pinstance->used_res_q);
|
|
}
|
|
|
|
memcpy(&res->cfg_entry, cfg_entry, pinstance->config_table_entry_size);
|
|
|
|
if (pinstance->ccn.hcam->notification_type ==
|
|
NOTIFICATION_TYPE_ENTRY_DELETED || hidden_entry) {
|
|
if (res->scsi_dev) {
|
|
if (fw_version <= PMCRAID_FW_VERSION_1)
|
|
res->cfg_entry.unique_flags1 &= 0x7F;
|
|
else
|
|
res->cfg_entry.array_id &= 0xFF;
|
|
res->change_detected = RES_CHANGE_DEL;
|
|
res->cfg_entry.resource_handle =
|
|
PMCRAID_INVALID_RES_HANDLE;
|
|
schedule_work(&pinstance->worker_q);
|
|
} else {
|
|
/* This may be one of the non-exposed resources */
|
|
list_move_tail(&res->queue, &pinstance->free_res_q);
|
|
}
|
|
} else if (!res->scsi_dev) {
|
|
res->change_detected = RES_CHANGE_ADD;
|
|
schedule_work(&pinstance->worker_q);
|
|
}
|
|
spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
|
|
|
|
out_notify_apps:
|
|
|
|
/* Notify configuration changes to registered applications.*/
|
|
if (!pmcraid_disable_aen)
|
|
pmcraid_notify_ccn(pinstance);
|
|
|
|
cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
|
|
if (cmd)
|
|
pmcraid_send_hcam_cmd(cmd);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_get_error_info - return error string for an ioasc
|
|
* @ioasc: ioasc code
|
|
* Return Value
|
|
* none
|
|
*/
|
|
static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc)
|
|
{
|
|
int i;
|
|
for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) {
|
|
if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc)
|
|
return &pmcraid_ioasc_error_table[i];
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_ioasc_logger - log IOASC information based user-settings
|
|
* @ioasc: ioasc code
|
|
* @cmd: pointer to command that resulted in 'ioasc'
|
|
*/
|
|
void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc);
|
|
|
|
if (error_info == NULL ||
|
|
cmd->drv_inst->current_log_level < error_info->log_level)
|
|
return;
|
|
|
|
/* log the error string */
|
|
pmcraid_err("cmd [%x] for resource %x failed with %x(%s)\n",
|
|
cmd->ioa_cb->ioarcb.cdb[0],
|
|
cmd->ioa_cb->ioarcb.resource_handle,
|
|
le32_to_cpu(ioasc), error_info->error_string);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_handle_error_log - Handle a config change (error log) from the IOA
|
|
*
|
|
* @pinstance: pointer to per adapter instance structure
|
|
*
|
|
* Return value:
|
|
* none
|
|
*/
|
|
static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance)
|
|
{
|
|
struct pmcraid_hcam_ldn *hcam_ldn;
|
|
u32 ioasc;
|
|
|
|
hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
|
|
|
|
pmcraid_info
|
|
("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n",
|
|
pinstance->ldn.hcam->ilid,
|
|
pinstance->ldn.hcam->op_code,
|
|
pinstance->ldn.hcam->notification_type,
|
|
pinstance->ldn.hcam->notification_lost,
|
|
pinstance->ldn.hcam->flags,
|
|
pinstance->ldn.hcam->overlay_id);
|
|
|
|
/* log only the errors, no need to log informational log entries */
|
|
if (pinstance->ldn.hcam->notification_type !=
|
|
NOTIFICATION_TYPE_ERROR_LOG)
|
|
return;
|
|
|
|
if (pinstance->ldn.hcam->notification_lost ==
|
|
HOSTRCB_NOTIFICATIONS_LOST)
|
|
dev_info(&pinstance->pdev->dev, "Error notifications lost\n");
|
|
|
|
ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc);
|
|
|
|
if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
|
|
ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) {
|
|
dev_info(&pinstance->pdev->dev,
|
|
"UnitAttention due to IOA Bus Reset\n");
|
|
scsi_report_bus_reset(
|
|
pinstance->host,
|
|
RES_BUS(hcam_ldn->error_log.fd_ra));
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_process_ccn - Op done function for a CCN.
|
|
* @cmd: pointer to command struct
|
|
*
|
|
* This function is the op done function for a configuration
|
|
* change notification
|
|
*
|
|
* Return value:
|
|
* none
|
|
*/
|
|
static void pmcraid_process_ccn(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
|
|
unsigned long lock_flags;
|
|
|
|
pinstance->ccn.cmd = NULL;
|
|
pmcraid_return_cmd(cmd);
|
|
|
|
/* If driver initiated IOA reset happened while this hcam was pending
|
|
* with IOA, or IOA bringdown sequence is in progress, no need to
|
|
* re-register the hcam
|
|
*/
|
|
if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
|
|
atomic_read(&pinstance->ccn.ignore) == 1) {
|
|
return;
|
|
} else if (ioasc) {
|
|
dev_info(&pinstance->pdev->dev,
|
|
"Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc);
|
|
spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
|
pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
|
|
spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
|
} else {
|
|
pmcraid_handle_config_change(pinstance);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pmcraid_process_ldn - op done function for an LDN
|
|
* @cmd: pointer to command block
|
|
*
|
|
* Return value
|
|
* none
|
|
*/
|
|
static void pmcraid_initiate_reset(struct pmcraid_instance *);
|
|
static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd);
|
|
|
|
static void pmcraid_process_ldn(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
struct pmcraid_hcam_ldn *ldn_hcam =
|
|
(struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
|
|
u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
|
|
u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc);
|
|
unsigned long lock_flags;
|
|
|
|
/* return the command block back to freepool */
|
|
pinstance->ldn.cmd = NULL;
|
|
pmcraid_return_cmd(cmd);
|
|
|
|
/* If driver initiated IOA reset happened while this hcam was pending
|
|
* with IOA, no need to re-register the hcam as reset engine will do it
|
|
* once reset sequence is complete
|
|
*/
|
|
if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
|
|
atomic_read(&pinstance->ccn.ignore) == 1) {
|
|
return;
|
|
} else if (!ioasc) {
|
|
pmcraid_handle_error_log(pinstance);
|
|
if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) {
|
|
spin_lock_irqsave(pinstance->host->host_lock,
|
|
lock_flags);
|
|
pmcraid_initiate_reset(pinstance);
|
|
spin_unlock_irqrestore(pinstance->host->host_lock,
|
|
lock_flags);
|
|
return;
|
|
}
|
|
if (fd_ioasc == PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC) {
|
|
pinstance->timestamp_error = 1;
|
|
pmcraid_set_timestamp(cmd);
|
|
}
|
|
} else {
|
|
dev_info(&pinstance->pdev->dev,
|
|
"Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc);
|
|
}
|
|
/* send netlink message for HCAM notification if enabled */
|
|
if (!pmcraid_disable_aen)
|
|
pmcraid_notify_ldn(pinstance);
|
|
|
|
cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
|
|
if (cmd)
|
|
pmcraid_send_hcam_cmd(cmd);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_register_hcams - register HCAMs for CCN and LDN
|
|
*
|
|
* @pinstance: pointer per adapter instance structure
|
|
*
|
|
* Return Value
|
|
* none
|
|
*/
|
|
static void pmcraid_register_hcams(struct pmcraid_instance *pinstance)
|
|
{
|
|
pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
|
|
pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_unregister_hcams - cancel HCAMs registered already
|
|
* @cmd: pointer to command used as part of reset sequence
|
|
*/
|
|
static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
|
|
/* During IOA bringdown, HCAM gets fired and tasklet proceeds with
|
|
* handling hcam response though it is not necessary. In order to
|
|
* prevent this, set 'ignore', so that bring-down sequence doesn't
|
|
* re-send any more hcams
|
|
*/
|
|
atomic_set(&pinstance->ccn.ignore, 1);
|
|
atomic_set(&pinstance->ldn.ignore, 1);
|
|
|
|
/* If adapter reset was forced as part of runtime reset sequence,
|
|
* start the reset sequence. Reset will be triggered even in case
|
|
* IOA unit_check.
|
|
*/
|
|
if ((pinstance->force_ioa_reset && !pinstance->ioa_bringdown) ||
|
|
pinstance->ioa_unit_check) {
|
|
pinstance->force_ioa_reset = 0;
|
|
pinstance->ioa_unit_check = 0;
|
|
pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
|
|
pmcraid_reset_alert(cmd);
|
|
return;
|
|
}
|
|
|
|
/* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM
|
|
* one after the other. So CCN cancellation will be triggered by
|
|
* pmcraid_cancel_ldn itself.
|
|
*/
|
|
pmcraid_cancel_ldn(cmd);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_reset_enable_ioa - re-enable IOA after a hard reset
|
|
* @pinstance: pointer to adapter instance structure
|
|
* Return Value
|
|
* 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0
|
|
*/
|
|
static void pmcraid_reinit_buffers(struct pmcraid_instance *);
|
|
|
|
static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance)
|
|
{
|
|
u32 intrs;
|
|
|
|
pmcraid_reinit_buffers(pinstance);
|
|
intrs = pmcraid_read_interrupts(pinstance);
|
|
|
|
pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
|
|
|
|
if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
|
|
if (!pinstance->interrupt_mode) {
|
|
iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
|
|
pinstance->int_regs.
|
|
ioa_host_interrupt_mask_reg);
|
|
iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
|
|
pinstance->int_regs.ioa_host_interrupt_clr_reg);
|
|
}
|
|
return 1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pmcraid_soft_reset - performs a soft reset and makes IOA become ready
|
|
* @cmd : pointer to reset command block
|
|
*
|
|
* Return Value
|
|
* none
|
|
*/
|
|
static void pmcraid_soft_reset(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
u32 int_reg;
|
|
u32 doorbell;
|
|
|
|
/* There will be an interrupt when Transition to Operational bit is
|
|
* set so tasklet would execute next reset task. The timeout handler
|
|
* would re-initiate a reset
|
|
*/
|
|
cmd->cmd_done = pmcraid_ioa_reset;
|
|
cmd->timer.data = (unsigned long)cmd;
|
|
cmd->timer.expires = jiffies +
|
|
msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT);
|
|
cmd->timer.function = (void (*)(unsigned long))pmcraid_timeout_handler;
|
|
|
|
if (!timer_pending(&cmd->timer))
|
|
add_timer(&cmd->timer);
|
|
|
|
/* Enable destructive diagnostics on IOA if it is not yet in
|
|
* operational state
|
|
*/
|
|
doorbell = DOORBELL_RUNTIME_RESET |
|
|
DOORBELL_ENABLE_DESTRUCTIVE_DIAGS;
|
|
|
|
/* Since we do RESET_ALERT and Start BIST we have to again write
|
|
* MSIX Doorbell to indicate the interrupt mode
|
|
*/
|
|
if (pinstance->interrupt_mode) {
|
|
iowrite32(DOORBELL_INTR_MODE_MSIX,
|
|
pinstance->int_regs.host_ioa_interrupt_reg);
|
|
ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
|
|
}
|
|
|
|
iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg);
|
|
ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
|
|
int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
|
|
|
|
pmcraid_info("Waiting for IOA to become operational %x:%x\n",
|
|
ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
|
|
int_reg);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt
|
|
*
|
|
* @pinstance: pointer to adapter instance structure
|
|
*
|
|
* Return Value
|
|
* none
|
|
*/
|
|
static void pmcraid_get_dump(struct pmcraid_instance *pinstance)
|
|
{
|
|
pmcraid_info("%s is not yet implemented\n", __func__);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_fail_outstanding_cmds - Fails all outstanding ops.
|
|
* @pinstance: pointer to adapter instance structure
|
|
*
|
|
* This function fails all outstanding ops. If they are submitted to IOA
|
|
* already, it sends cancel all messages if IOA is still accepting IOARCBs,
|
|
* otherwise just completes the commands and returns the cmd blocks to free
|
|
* pool.
|
|
*
|
|
* Return value:
|
|
* none
|
|
*/
|
|
static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance)
|
|
{
|
|
struct pmcraid_cmd *cmd, *temp;
|
|
unsigned long lock_flags;
|
|
|
|
/* pending command list is protected by pending_pool_lock. Its
|
|
* traversal must be done as within this lock
|
|
*/
|
|
spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
|
|
list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool,
|
|
free_list) {
|
|
list_del(&cmd->free_list);
|
|
spin_unlock_irqrestore(&pinstance->pending_pool_lock,
|
|
lock_flags);
|
|
cmd->ioa_cb->ioasa.ioasc =
|
|
cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET);
|
|
cmd->ioa_cb->ioasa.ilid =
|
|
cpu_to_be32(PMCRAID_DRIVER_ILID);
|
|
|
|
/* In case the command timer is still running */
|
|
del_timer(&cmd->timer);
|
|
|
|
/* If this is an IO command, complete it by invoking scsi_done
|
|
* function. If this is one of the internal commands other
|
|
* than pmcraid_ioa_reset and HCAM commands invoke cmd_done to
|
|
* complete it
|
|
*/
|
|
if (cmd->scsi_cmd) {
|
|
|
|
struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
|
|
__le32 resp = cmd->ioa_cb->ioarcb.response_handle;
|
|
|
|
scsi_cmd->result |= DID_ERROR << 16;
|
|
|
|
scsi_dma_unmap(scsi_cmd);
|
|
pmcraid_return_cmd(cmd);
|
|
|
|
pmcraid_info("failing(%d) CDB[0] = %x result: %x\n",
|
|
le32_to_cpu(resp) >> 2,
|
|
cmd->ioa_cb->ioarcb.cdb[0],
|
|
scsi_cmd->result);
|
|
scsi_cmd->scsi_done(scsi_cmd);
|
|
} else if (cmd->cmd_done == pmcraid_internal_done ||
|
|
cmd->cmd_done == pmcraid_erp_done) {
|
|
cmd->cmd_done(cmd);
|
|
} else if (cmd->cmd_done != pmcraid_ioa_reset &&
|
|
cmd->cmd_done != pmcraid_ioa_shutdown_done) {
|
|
pmcraid_return_cmd(cmd);
|
|
}
|
|
|
|
atomic_dec(&pinstance->outstanding_cmds);
|
|
spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_ioa_reset - Implementation of IOA reset logic
|
|
*
|
|
* @cmd: pointer to the cmd block to be used for entire reset process
|
|
*
|
|
* This function executes most of the steps required for IOA reset. This gets
|
|
* called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's
|
|
* 'eh_' thread. Access to variables used for controlling the reset sequence is
|
|
* synchronized using host lock. Various functions called during reset process
|
|
* would make use of a single command block, pointer to which is also stored in
|
|
* adapter instance structure.
|
|
*
|
|
* Return Value
|
|
* None
|
|
*/
|
|
static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
u8 reset_complete = 0;
|
|
|
|
pinstance->ioa_reset_in_progress = 1;
|
|
|
|
if (pinstance->reset_cmd != cmd) {
|
|
pmcraid_err("reset is called with different command block\n");
|
|
pinstance->reset_cmd = cmd;
|
|
}
|
|
|
|
pmcraid_info("reset_engine: state = %d, command = %p\n",
|
|
pinstance->ioa_state, cmd);
|
|
|
|
switch (pinstance->ioa_state) {
|
|
|
|
case IOA_STATE_DEAD:
|
|
/* If IOA is offline, whatever may be the reset reason, just
|
|
* return. callers might be waiting on the reset wait_q, wake
|
|
* up them
|
|
*/
|
|
pmcraid_err("IOA is offline no reset is possible\n");
|
|
reset_complete = 1;
|
|
break;
|
|
|
|
case IOA_STATE_IN_BRINGDOWN:
|
|
/* we enter here, once ioa shutdown command is processed by IOA
|
|
* Alert IOA for a possible reset. If reset alert fails, IOA
|
|
* goes through hard-reset
|
|
*/
|
|
pmcraid_disable_interrupts(pinstance, ~0);
|
|
pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
|
|
pmcraid_reset_alert(cmd);
|
|
break;
|
|
|
|
case IOA_STATE_UNKNOWN:
|
|
/* We may be called during probe or resume. Some pre-processing
|
|
* is required for prior to reset
|
|
*/
|
|
scsi_block_requests(pinstance->host);
|
|
|
|
/* If asked to reset while IOA was processing responses or
|
|
* there are any error responses then IOA may require
|
|
* hard-reset.
|
|
*/
|
|
if (pinstance->ioa_hard_reset == 0) {
|
|
if (ioread32(pinstance->ioa_status) &
|
|
INTRS_TRANSITION_TO_OPERATIONAL) {
|
|
pmcraid_info("sticky bit set, bring-up\n");
|
|
pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
|
|
pmcraid_reinit_cmdblk(cmd);
|
|
pmcraid_identify_hrrq(cmd);
|
|
} else {
|
|
pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
|
|
pmcraid_soft_reset(cmd);
|
|
}
|
|
} else {
|
|
/* Alert IOA of a possible reset and wait for critical
|
|
* operation in progress bit to reset
|
|
*/
|
|
pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
|
|
pmcraid_reset_alert(cmd);
|
|
}
|
|
break;
|
|
|
|
case IOA_STATE_IN_RESET_ALERT:
|
|
/* If critical operation in progress bit is reset or wait gets
|
|
* timed out, reset proceeds with starting BIST on the IOA.
|
|
* pmcraid_ioa_hard_reset keeps a count of reset attempts. If
|
|
* they are 3 or more, reset engine marks IOA dead and returns
|
|
*/
|
|
pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
|
|
pmcraid_start_bist(cmd);
|
|
break;
|
|
|
|
case IOA_STATE_IN_HARD_RESET:
|
|
pinstance->ioa_reset_attempts++;
|
|
|
|
/* retry reset if we haven't reached maximum allowed limit */
|
|
if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) {
|
|
pinstance->ioa_reset_attempts = 0;
|
|
pmcraid_err("IOA didn't respond marking it as dead\n");
|
|
pinstance->ioa_state = IOA_STATE_DEAD;
|
|
|
|
if (pinstance->ioa_bringdown)
|
|
pmcraid_notify_ioastate(pinstance,
|
|
PMC_DEVICE_EVENT_SHUTDOWN_FAILED);
|
|
else
|
|
pmcraid_notify_ioastate(pinstance,
|
|
PMC_DEVICE_EVENT_RESET_FAILED);
|
|
reset_complete = 1;
|
|
break;
|
|
}
|
|
|
|
/* Once either bist or pci reset is done, restore PCI config
|
|
* space. If this fails, proceed with hard reset again
|
|
*/
|
|
pci_restore_state(pinstance->pdev);
|
|
|
|
/* fail all pending commands */
|
|
pmcraid_fail_outstanding_cmds(pinstance);
|
|
|
|
/* check if unit check is active, if so extract dump */
|
|
if (pinstance->ioa_unit_check) {
|
|
pmcraid_info("unit check is active\n");
|
|
pinstance->ioa_unit_check = 0;
|
|
pmcraid_get_dump(pinstance);
|
|
pinstance->ioa_reset_attempts--;
|
|
pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
|
|
pmcraid_reset_alert(cmd);
|
|
break;
|
|
}
|
|
|
|
/* if the reset reason is to bring-down the ioa, we might be
|
|
* done with the reset restore pci_config_space and complete
|
|
* the reset
|
|
*/
|
|
if (pinstance->ioa_bringdown) {
|
|
pmcraid_info("bringing down the adapter\n");
|
|
pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
|
|
pinstance->ioa_bringdown = 0;
|
|
pinstance->ioa_state = IOA_STATE_UNKNOWN;
|
|
pmcraid_notify_ioastate(pinstance,
|
|
PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS);
|
|
reset_complete = 1;
|
|
} else {
|
|
/* bring-up IOA, so proceed with soft reset
|
|
* Reinitialize hrrq_buffers and their indices also
|
|
* enable interrupts after a pci_restore_state
|
|
*/
|
|
if (pmcraid_reset_enable_ioa(pinstance)) {
|
|
pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
|
|
pmcraid_info("bringing up the adapter\n");
|
|
pmcraid_reinit_cmdblk(cmd);
|
|
pmcraid_identify_hrrq(cmd);
|
|
} else {
|
|
pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
|
|
pmcraid_soft_reset(cmd);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case IOA_STATE_IN_SOFT_RESET:
|
|
/* TRANSITION TO OPERATIONAL is on so start initialization
|
|
* sequence
|
|
*/
|
|
pmcraid_info("In softreset proceeding with bring-up\n");
|
|
pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
|
|
|
|
/* Initialization commands start with HRRQ identification. From
|
|
* now on tasklet completes most of the commands as IOA is up
|
|
* and intrs are enabled
|
|
*/
|
|
pmcraid_identify_hrrq(cmd);
|
|
break;
|
|
|
|
case IOA_STATE_IN_BRINGUP:
|
|
/* we are done with bringing up of IOA, change the ioa_state to
|
|
* operational and wake up any waiters
|
|
*/
|
|
pinstance->ioa_state = IOA_STATE_OPERATIONAL;
|
|
reset_complete = 1;
|
|
break;
|
|
|
|
case IOA_STATE_OPERATIONAL:
|
|
default:
|
|
/* When IOA is operational and a reset is requested, check for
|
|
* the reset reason. If reset is to bring down IOA, unregister
|
|
* HCAMs and initiate shutdown; if adapter reset is forced then
|
|
* restart reset sequence again
|
|
*/
|
|
if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE &&
|
|
pinstance->force_ioa_reset == 0) {
|
|
pmcraid_notify_ioastate(pinstance,
|
|
PMC_DEVICE_EVENT_RESET_SUCCESS);
|
|
reset_complete = 1;
|
|
} else {
|
|
if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE)
|
|
pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN;
|
|
pmcraid_reinit_cmdblk(cmd);
|
|
pmcraid_unregister_hcams(cmd);
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* reset will be completed if ioa_state is either DEAD or UNKNOWN or
|
|
* OPERATIONAL. Reset all control variables used during reset, wake up
|
|
* any waiting threads and let the SCSI mid-layer send commands. Note
|
|
* that host_lock must be held before invoking scsi_report_bus_reset.
|
|
*/
|
|
if (reset_complete) {
|
|
pinstance->ioa_reset_in_progress = 0;
|
|
pinstance->ioa_reset_attempts = 0;
|
|
pinstance->reset_cmd = NULL;
|
|
pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
|
|
pinstance->ioa_bringdown = 0;
|
|
pmcraid_return_cmd(cmd);
|
|
|
|
/* If target state is to bring up the adapter, proceed with
|
|
* hcam registration and resource exposure to mid-layer.
|
|
*/
|
|
if (pinstance->ioa_state == IOA_STATE_OPERATIONAL)
|
|
pmcraid_register_hcams(pinstance);
|
|
|
|
wake_up_all(&pinstance->reset_wait_q);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_initiate_reset - initiates reset sequence. This is called from
|
|
* ISR/tasklet during error interrupts including IOA unit check. If reset
|
|
* is already in progress, it just returns, otherwise initiates IOA reset
|
|
* to bring IOA up to operational state.
|
|
*
|
|
* @pinstance: pointer to adapter instance structure
|
|
*
|
|
* Return value
|
|
* none
|
|
*/
|
|
static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance)
|
|
{
|
|
struct pmcraid_cmd *cmd;
|
|
|
|
/* If the reset is already in progress, just return, otherwise start
|
|
* reset sequence and return
|
|
*/
|
|
if (!pinstance->ioa_reset_in_progress) {
|
|
scsi_block_requests(pinstance->host);
|
|
cmd = pmcraid_get_free_cmd(pinstance);
|
|
|
|
if (cmd == NULL) {
|
|
pmcraid_err("no cmnd blocks for initiate_reset\n");
|
|
return;
|
|
}
|
|
|
|
pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
|
|
pinstance->reset_cmd = cmd;
|
|
pinstance->force_ioa_reset = 1;
|
|
pmcraid_notify_ioastate(pinstance,
|
|
PMC_DEVICE_EVENT_RESET_START);
|
|
pmcraid_ioa_reset(cmd);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pmcraid_reset_reload - utility routine for doing IOA reset either to bringup
|
|
* or bringdown IOA
|
|
* @pinstance: pointer adapter instance structure
|
|
* @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV
|
|
* @target_state: expected target state after reset
|
|
*
|
|
* Note: This command initiates reset and waits for its completion. Hence this
|
|
* should not be called from isr/timer/tasklet functions (timeout handlers,
|
|
* error response handlers and interrupt handlers).
|
|
*
|
|
* Return Value
|
|
* 1 in case ioa_state is not target_state, 0 otherwise.
|
|
*/
|
|
static int pmcraid_reset_reload(
|
|
struct pmcraid_instance *pinstance,
|
|
u8 shutdown_type,
|
|
u8 target_state
|
|
)
|
|
{
|
|
struct pmcraid_cmd *reset_cmd = NULL;
|
|
unsigned long lock_flags;
|
|
int reset = 1;
|
|
|
|
spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
|
|
|
if (pinstance->ioa_reset_in_progress) {
|
|
pmcraid_info("reset_reload: reset is already in progress\n");
|
|
|
|
spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
|
|
|
wait_event(pinstance->reset_wait_q,
|
|
!pinstance->ioa_reset_in_progress);
|
|
|
|
spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
|
|
|
if (pinstance->ioa_state == IOA_STATE_DEAD) {
|
|
spin_unlock_irqrestore(pinstance->host->host_lock,
|
|
lock_flags);
|
|
pmcraid_info("reset_reload: IOA is dead\n");
|
|
return reset;
|
|
} else if (pinstance->ioa_state == target_state) {
|
|
reset = 0;
|
|
}
|
|
}
|
|
|
|
if (reset) {
|
|
pmcraid_info("reset_reload: proceeding with reset\n");
|
|
scsi_block_requests(pinstance->host);
|
|
reset_cmd = pmcraid_get_free_cmd(pinstance);
|
|
|
|
if (reset_cmd == NULL) {
|
|
pmcraid_err("no free cmnd for reset_reload\n");
|
|
spin_unlock_irqrestore(pinstance->host->host_lock,
|
|
lock_flags);
|
|
return reset;
|
|
}
|
|
|
|
if (shutdown_type == SHUTDOWN_NORMAL)
|
|
pinstance->ioa_bringdown = 1;
|
|
|
|
pinstance->ioa_shutdown_type = shutdown_type;
|
|
pinstance->reset_cmd = reset_cmd;
|
|
pinstance->force_ioa_reset = reset;
|
|
pmcraid_info("reset_reload: initiating reset\n");
|
|
pmcraid_ioa_reset(reset_cmd);
|
|
spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
|
pmcraid_info("reset_reload: waiting for reset to complete\n");
|
|
wait_event(pinstance->reset_wait_q,
|
|
!pinstance->ioa_reset_in_progress);
|
|
|
|
pmcraid_info("reset_reload: reset is complete !!\n");
|
|
scsi_unblock_requests(pinstance->host);
|
|
if (pinstance->ioa_state == target_state)
|
|
reset = 0;
|
|
}
|
|
|
|
return reset;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA
|
|
*
|
|
* @pinstance: pointer to adapter instance structure
|
|
*
|
|
* Return Value
|
|
* whatever is returned from pmcraid_reset_reload
|
|
*/
|
|
static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance)
|
|
{
|
|
return pmcraid_reset_reload(pinstance,
|
|
SHUTDOWN_NORMAL,
|
|
IOA_STATE_UNKNOWN);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA
|
|
*
|
|
* @pinstance: pointer to adapter instance structure
|
|
*
|
|
* Return Value
|
|
* whatever is returned from pmcraid_reset_reload
|
|
*/
|
|
static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance)
|
|
{
|
|
pmcraid_notify_ioastate(pinstance, PMC_DEVICE_EVENT_RESET_START);
|
|
|
|
return pmcraid_reset_reload(pinstance,
|
|
SHUTDOWN_NONE,
|
|
IOA_STATE_OPERATIONAL);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_request_sense - Send request sense to a device
|
|
* @cmd: pmcraid command struct
|
|
*
|
|
* This function sends a request sense to a device as a result of a check
|
|
* condition. This method re-uses the same command block that failed earlier.
|
|
*/
|
|
static void pmcraid_request_sense(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
|
struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
|
|
|
|
/* allocate DMAable memory for sense buffers */
|
|
cmd->sense_buffer = pci_alloc_consistent(cmd->drv_inst->pdev,
|
|
SCSI_SENSE_BUFFERSIZE,
|
|
&cmd->sense_buffer_dma);
|
|
|
|
if (cmd->sense_buffer == NULL) {
|
|
pmcraid_err
|
|
("couldn't allocate sense buffer for request sense\n");
|
|
pmcraid_erp_done(cmd);
|
|
return;
|
|
}
|
|
|
|
/* re-use the command block */
|
|
memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa));
|
|
memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
|
|
ioarcb->request_flags0 = (SYNC_COMPLETE |
|
|
NO_LINK_DESCS |
|
|
INHIBIT_UL_CHECK);
|
|
ioarcb->request_type = REQ_TYPE_SCSI;
|
|
ioarcb->cdb[0] = REQUEST_SENSE;
|
|
ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE;
|
|
|
|
ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
|
|
offsetof(struct pmcraid_ioarcb,
|
|
add_data.u.ioadl[0]));
|
|
ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
|
|
|
|
ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
|
|
|
|
ioadl->address = cpu_to_le64(cmd->sense_buffer_dma);
|
|
ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
|
|
ioadl->flags = IOADL_FLAGS_LAST_DESC;
|
|
|
|
/* request sense might be called as part of error response processing
|
|
* which runs in tasklets context. It is possible that mid-layer might
|
|
* schedule queuecommand during this time, hence, writting to IOARRIN
|
|
* must be protect by host_lock
|
|
*/
|
|
pmcraid_send_cmd(cmd, pmcraid_erp_done,
|
|
PMCRAID_REQUEST_SENSE_TIMEOUT,
|
|
pmcraid_timeout_handler);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery
|
|
* @cmd: command that failed
|
|
* @sense: true if request_sense is required after cancel all
|
|
*
|
|
* This function sends a cancel all to a device to clear the queue.
|
|
*/
|
|
static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, u32 sense)
|
|
{
|
|
struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
|
|
struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
|
struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
|
|
void (*cmd_done) (struct pmcraid_cmd *) = sense ? pmcraid_erp_done
|
|
: pmcraid_request_sense;
|
|
|
|
memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
|
|
ioarcb->request_flags0 = SYNC_OVERRIDE;
|
|
ioarcb->request_type = REQ_TYPE_IOACMD;
|
|
ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS;
|
|
|
|
if (RES_IS_GSCSI(res->cfg_entry))
|
|
ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL;
|
|
|
|
ioarcb->ioadl_bus_addr = 0;
|
|
ioarcb->ioadl_length = 0;
|
|
ioarcb->data_transfer_length = 0;
|
|
ioarcb->ioarcb_bus_addr &= (~0x1FULL);
|
|
|
|
/* writing to IOARRIN must be protected by host_lock, as mid-layer
|
|
* schedule queuecommand while we are doing this
|
|
*/
|
|
pmcraid_send_cmd(cmd, cmd_done,
|
|
PMCRAID_REQUEST_SENSE_TIMEOUT,
|
|
pmcraid_timeout_handler);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_frame_auto_sense: frame fixed format sense information
|
|
*
|
|
* @cmd: pointer to failing command block
|
|
*
|
|
* Return value
|
|
* none
|
|
*/
|
|
static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd)
|
|
{
|
|
u8 *sense_buf = cmd->scsi_cmd->sense_buffer;
|
|
struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata;
|
|
struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
|
|
u32 ioasc = le32_to_cpu(ioasa->ioasc);
|
|
u32 failing_lba = 0;
|
|
|
|
memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
|
|
cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
|
|
|
|
if (RES_IS_VSET(res->cfg_entry) &&
|
|
ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC &&
|
|
ioasa->u.vset.failing_lba_hi != 0) {
|
|
|
|
sense_buf[0] = 0x72;
|
|
sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc);
|
|
sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc);
|
|
sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
|
|
|
|
sense_buf[7] = 12;
|
|
sense_buf[8] = 0;
|
|
sense_buf[9] = 0x0A;
|
|
sense_buf[10] = 0x80;
|
|
|
|
failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi);
|
|
|
|
sense_buf[12] = (failing_lba & 0xff000000) >> 24;
|
|
sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
|
|
sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
|
|
sense_buf[15] = failing_lba & 0x000000ff;
|
|
|
|
failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo);
|
|
|
|
sense_buf[16] = (failing_lba & 0xff000000) >> 24;
|
|
sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
|
|
sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
|
|
sense_buf[19] = failing_lba & 0x000000ff;
|
|
} else {
|
|
sense_buf[0] = 0x70;
|
|
sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc);
|
|
sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc);
|
|
sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
|
|
|
|
if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) {
|
|
if (RES_IS_VSET(res->cfg_entry))
|
|
failing_lba =
|
|
le32_to_cpu(ioasa->u.
|
|
vset.failing_lba_lo);
|
|
sense_buf[0] |= 0x80;
|
|
sense_buf[3] = (failing_lba >> 24) & 0xff;
|
|
sense_buf[4] = (failing_lba >> 16) & 0xff;
|
|
sense_buf[5] = (failing_lba >> 8) & 0xff;
|
|
sense_buf[6] = failing_lba & 0xff;
|
|
}
|
|
|
|
sense_buf[7] = 6; /* additional length */
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pmcraid_error_handler - Error response handlers for a SCSI op
|
|
* @cmd: pointer to pmcraid_cmd that has failed
|
|
*
|
|
* This function determines whether or not to initiate ERP on the affected
|
|
* device. This is called from a tasklet, which doesn't hold any locks.
|
|
*
|
|
* Return value:
|
|
* 0 it caller can complete the request, otherwise 1 where in error
|
|
* handler itself completes the request and returns the command block
|
|
* back to free-pool
|
|
*/
|
|
static int pmcraid_error_handler(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
|
|
struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
|
|
u32 ioasc = le32_to_cpu(ioasa->ioasc);
|
|
u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK;
|
|
u32 sense_copied = 0;
|
|
|
|
if (!res) {
|
|
pmcraid_info("resource pointer is NULL\n");
|
|
return 0;
|
|
}
|
|
|
|
/* If this was a SCSI read/write command keep count of errors */
|
|
if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD)
|
|
atomic_inc(&res->read_failures);
|
|
else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD)
|
|
atomic_inc(&res->write_failures);
|
|
|
|
if (!RES_IS_GSCSI(res->cfg_entry) &&
|
|
masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) {
|
|
pmcraid_frame_auto_sense(cmd);
|
|
}
|
|
|
|
/* Log IOASC/IOASA information based on user settings */
|
|
pmcraid_ioasc_logger(ioasc, cmd);
|
|
|
|
switch (masked_ioasc) {
|
|
|
|
case PMCRAID_IOASC_AC_TERMINATED_BY_HOST:
|
|
scsi_cmd->result |= (DID_ABORT << 16);
|
|
break;
|
|
|
|
case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE:
|
|
case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE:
|
|
scsi_cmd->result |= (DID_NO_CONNECT << 16);
|
|
break;
|
|
|
|
case PMCRAID_IOASC_NR_SYNC_REQUIRED:
|
|
res->sync_reqd = 1;
|
|
scsi_cmd->result |= (DID_IMM_RETRY << 16);
|
|
break;
|
|
|
|
case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC:
|
|
scsi_cmd->result |= (DID_PASSTHROUGH << 16);
|
|
break;
|
|
|
|
case PMCRAID_IOASC_UA_BUS_WAS_RESET:
|
|
case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER:
|
|
if (!res->reset_progress)
|
|
scsi_report_bus_reset(pinstance->host,
|
|
scsi_cmd->device->channel);
|
|
scsi_cmd->result |= (DID_ERROR << 16);
|
|
break;
|
|
|
|
case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR:
|
|
scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc);
|
|
res->sync_reqd = 1;
|
|
|
|
/* if check_condition is not active return with error otherwise
|
|
* get/frame the sense buffer
|
|
*/
|
|
if (PMCRAID_IOASC_SENSE_STATUS(ioasc) !=
|
|
SAM_STAT_CHECK_CONDITION &&
|
|
PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE)
|
|
return 0;
|
|
|
|
/* If we have auto sense data as part of IOASA pass it to
|
|
* mid-layer
|
|
*/
|
|
if (ioasa->auto_sense_length != 0) {
|
|
short sense_len = ioasa->auto_sense_length;
|
|
int data_size = min_t(u16, le16_to_cpu(sense_len),
|
|
SCSI_SENSE_BUFFERSIZE);
|
|
|
|
memcpy(scsi_cmd->sense_buffer,
|
|
ioasa->sense_data,
|
|
data_size);
|
|
sense_copied = 1;
|
|
}
|
|
|
|
if (RES_IS_GSCSI(res->cfg_entry))
|
|
pmcraid_cancel_all(cmd, sense_copied);
|
|
else if (sense_copied)
|
|
pmcraid_erp_done(cmd);
|
|
else
|
|
pmcraid_request_sense(cmd);
|
|
|
|
return 1;
|
|
|
|
case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED:
|
|
break;
|
|
|
|
default:
|
|
if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
|
|
scsi_cmd->result |= (DID_ERROR << 16);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_reset_device - device reset handler functions
|
|
*
|
|
* @scsi_cmd: scsi command struct
|
|
* @modifier: reset modifier indicating the reset sequence to be performed
|
|
*
|
|
* This function issues a device reset to the affected device.
|
|
* A LUN reset will be sent to the device first. If that does
|
|
* not work, a target reset will be sent.
|
|
*
|
|
* Return value:
|
|
* SUCCESS / FAILED
|
|
*/
|
|
static int pmcraid_reset_device(
|
|
struct scsi_cmnd *scsi_cmd,
|
|
unsigned long timeout,
|
|
u8 modifier
|
|
)
|
|
{
|
|
struct pmcraid_cmd *cmd;
|
|
struct pmcraid_instance *pinstance;
|
|
struct pmcraid_resource_entry *res;
|
|
struct pmcraid_ioarcb *ioarcb;
|
|
unsigned long lock_flags;
|
|
u32 ioasc;
|
|
|
|
pinstance =
|
|
(struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
|
|
res = scsi_cmd->device->hostdata;
|
|
|
|
if (!res) {
|
|
sdev_printk(KERN_ERR, scsi_cmd->device,
|
|
"reset_device: NULL resource pointer\n");
|
|
return FAILED;
|
|
}
|
|
|
|
/* If adapter is currently going through reset/reload, return failed.
|
|
* This will force the mid-layer to call _eh_bus/host reset, which
|
|
* will then go to sleep and wait for the reset to complete
|
|
*/
|
|
spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
|
if (pinstance->ioa_reset_in_progress ||
|
|
pinstance->ioa_state == IOA_STATE_DEAD) {
|
|
spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
|
return FAILED;
|
|
}
|
|
|
|
res->reset_progress = 1;
|
|
pmcraid_info("Resetting %s resource with addr %x\n",
|
|
((modifier & RESET_DEVICE_LUN) ? "LUN" :
|
|
((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")),
|
|
le32_to_cpu(res->cfg_entry.resource_address));
|
|
|
|
/* get a free cmd block */
|
|
cmd = pmcraid_get_free_cmd(pinstance);
|
|
|
|
if (cmd == NULL) {
|
|
spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
|
pmcraid_err("%s: no cmd blocks are available\n", __func__);
|
|
return FAILED;
|
|
}
|
|
|
|
ioarcb = &cmd->ioa_cb->ioarcb;
|
|
ioarcb->resource_handle = res->cfg_entry.resource_handle;
|
|
ioarcb->request_type = REQ_TYPE_IOACMD;
|
|
ioarcb->cdb[0] = PMCRAID_RESET_DEVICE;
|
|
|
|
/* Initialize reset modifier bits */
|
|
if (modifier)
|
|
modifier = ENABLE_RESET_MODIFIER | modifier;
|
|
|
|
ioarcb->cdb[1] = modifier;
|
|
|
|
init_completion(&cmd->wait_for_completion);
|
|
cmd->completion_req = 1;
|
|
|
|
pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
|
|
cmd->ioa_cb->ioarcb.cdb[0],
|
|
le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
|
|
le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
|
|
|
|
pmcraid_send_cmd(cmd,
|
|
pmcraid_internal_done,
|
|
timeout,
|
|
pmcraid_timeout_handler);
|
|
|
|
spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
|
|
|
/* RESET_DEVICE command completes after all pending IOARCBs are
|
|
* completed. Once this command is completed, pmcraind_internal_done
|
|
* will wake up the 'completion' queue.
|
|
*/
|
|
wait_for_completion(&cmd->wait_for_completion);
|
|
|
|
/* complete the command here itself and return the command block
|
|
* to free list
|
|
*/
|
|
pmcraid_return_cmd(cmd);
|
|
res->reset_progress = 0;
|
|
ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
|
|
|
|
/* set the return value based on the returned ioasc */
|
|
return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* _pmcraid_io_done - helper for pmcraid_io_done function
|
|
*
|
|
* @cmd: pointer to pmcraid command struct
|
|
* @reslen: residual data length to be set in the ioasa
|
|
* @ioasc: ioasc either returned by IOA or set by driver itself.
|
|
*
|
|
* This function is invoked by pmcraid_io_done to complete mid-layer
|
|
* scsi ops.
|
|
*
|
|
* Return value:
|
|
* 0 if caller is required to return it to free_pool. Returns 1 if
|
|
* caller need not worry about freeing command block as error handler
|
|
* will take care of that.
|
|
*/
|
|
|
|
static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc)
|
|
{
|
|
struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
|
|
int rc = 0;
|
|
|
|
scsi_set_resid(scsi_cmd, reslen);
|
|
|
|
pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
|
|
le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
|
|
cmd->ioa_cb->ioarcb.cdb[0],
|
|
ioasc, scsi_cmd->result);
|
|
|
|
if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0)
|
|
rc = pmcraid_error_handler(cmd);
|
|
|
|
if (rc == 0) {
|
|
scsi_dma_unmap(scsi_cmd);
|
|
scsi_cmd->scsi_done(scsi_cmd);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_io_done - SCSI completion function
|
|
*
|
|
* @cmd: pointer to pmcraid command struct
|
|
*
|
|
* This function is invoked by tasklet/mid-layer error handler to completing
|
|
* the SCSI ops sent from mid-layer.
|
|
*
|
|
* Return value
|
|
* none
|
|
*/
|
|
|
|
static void pmcraid_io_done(struct pmcraid_cmd *cmd)
|
|
{
|
|
u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
|
|
u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length);
|
|
|
|
if (_pmcraid_io_done(cmd, reslen, ioasc) == 0)
|
|
pmcraid_return_cmd(cmd);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA
|
|
*
|
|
* @cmd: command block of the command to be aborted
|
|
*
|
|
* Return Value:
|
|
* returns pointer to command structure used as cancelling cmd
|
|
*/
|
|
static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_cmd *cancel_cmd;
|
|
struct pmcraid_instance *pinstance;
|
|
struct pmcraid_resource_entry *res;
|
|
|
|
pinstance = (struct pmcraid_instance *)cmd->drv_inst;
|
|
res = cmd->scsi_cmd->device->hostdata;
|
|
|
|
cancel_cmd = pmcraid_get_free_cmd(pinstance);
|
|
|
|
if (cancel_cmd == NULL) {
|
|
pmcraid_err("%s: no cmd blocks are available\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
pmcraid_prepare_cancel_cmd(cancel_cmd, cmd);
|
|
|
|
pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
|
|
cmd->ioa_cb->ioarcb.cdb[0],
|
|
cmd->ioa_cb->ioarcb.response_handle >> 2);
|
|
|
|
init_completion(&cancel_cmd->wait_for_completion);
|
|
cancel_cmd->completion_req = 1;
|
|
|
|
pmcraid_info("command (%d) CDB[0] = %x for %x\n",
|
|
le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2,
|
|
cancel_cmd->ioa_cb->ioarcb.cdb[0],
|
|
le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle));
|
|
|
|
pmcraid_send_cmd(cancel_cmd,
|
|
pmcraid_internal_done,
|
|
PMCRAID_INTERNAL_TIMEOUT,
|
|
pmcraid_timeout_handler);
|
|
return cancel_cmd;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_abort_complete - Waits for ABORT TASK completion
|
|
*
|
|
* @cancel_cmd: command block use as cancelling command
|
|
*
|
|
* Return Value:
|
|
* returns SUCCESS if ABORT TASK has good completion
|
|
* otherwise FAILED
|
|
*/
|
|
static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd)
|
|
{
|
|
struct pmcraid_resource_entry *res;
|
|
u32 ioasc;
|
|
|
|
wait_for_completion(&cancel_cmd->wait_for_completion);
|
|
res = cancel_cmd->res;
|
|
cancel_cmd->res = NULL;
|
|
ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc);
|
|
|
|
/* If the abort task is not timed out we will get a Good completion
|
|
* as sense_key, otherwise we may get one the following responses
|
|
* due to subsequent bus reset or device reset. In case IOASC is
|
|
* NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
|
|
*/
|
|
if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
|
|
ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) {
|
|
if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED)
|
|
res->sync_reqd = 1;
|
|
ioasc = 0;
|
|
}
|
|
|
|
/* complete the command here itself */
|
|
pmcraid_return_cmd(cancel_cmd);
|
|
return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_eh_abort_handler - entry point for aborting a single task on errors
|
|
*
|
|
* @scsi_cmd: scsi command struct given by mid-layer. When this is called
|
|
* mid-layer ensures that no other commands are queued. This
|
|
* never gets called under interrupt, but a separate eh thread.
|
|
*
|
|
* Return value:
|
|
* SUCCESS / FAILED
|
|
*/
|
|
static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd)
|
|
{
|
|
struct pmcraid_instance *pinstance;
|
|
struct pmcraid_cmd *cmd;
|
|
struct pmcraid_resource_entry *res;
|
|
unsigned long host_lock_flags;
|
|
unsigned long pending_lock_flags;
|
|
struct pmcraid_cmd *cancel_cmd = NULL;
|
|
int cmd_found = 0;
|
|
int rc = FAILED;
|
|
|
|
pinstance =
|
|
(struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
|
|
|
|
scmd_printk(KERN_INFO, scsi_cmd,
|
|
"I/O command timed out, aborting it.\n");
|
|
|
|
res = scsi_cmd->device->hostdata;
|
|
|
|
if (res == NULL)
|
|
return rc;
|
|
|
|
/* If we are currently going through reset/reload, return failed.
|
|
* This will force the mid-layer to eventually call
|
|
* pmcraid_eh_host_reset which will then go to sleep and wait for the
|
|
* reset to complete
|
|
*/
|
|
spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags);
|
|
|
|
if (pinstance->ioa_reset_in_progress ||
|
|
pinstance->ioa_state == IOA_STATE_DEAD) {
|
|
spin_unlock_irqrestore(pinstance->host->host_lock,
|
|
host_lock_flags);
|
|
return rc;
|
|
}
|
|
|
|
/* loop over pending cmd list to find cmd corresponding to this
|
|
* scsi_cmd. Note that this command might not have been completed
|
|
* already. locking: all pending commands are protected with
|
|
* pending_pool_lock.
|
|
*/
|
|
spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags);
|
|
list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) {
|
|
|
|
if (cmd->scsi_cmd == scsi_cmd) {
|
|
cmd_found = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
spin_unlock_irqrestore(&pinstance->pending_pool_lock,
|
|
pending_lock_flags);
|
|
|
|
/* If the command to be aborted was given to IOA and still pending with
|
|
* it, send ABORT_TASK to abort this and wait for its completion
|
|
*/
|
|
if (cmd_found)
|
|
cancel_cmd = pmcraid_abort_cmd(cmd);
|
|
|
|
spin_unlock_irqrestore(pinstance->host->host_lock,
|
|
host_lock_flags);
|
|
|
|
if (cancel_cmd) {
|
|
cancel_cmd->res = cmd->scsi_cmd->device->hostdata;
|
|
rc = pmcraid_abort_complete(cancel_cmd);
|
|
}
|
|
|
|
return cmd_found ? rc : SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks
|
|
*
|
|
* @scmd: pointer to scsi_cmd that was sent to the resource to be reset.
|
|
*
|
|
* All these routines invokve pmcraid_reset_device with appropriate parameters.
|
|
* Since these are called from mid-layer EH thread, no other IO will be queued
|
|
* to the resource being reset. However, control path (IOCTL) may be active so
|
|
* it is necessary to synchronize IOARRIN writes which pmcraid_reset_device
|
|
* takes care by locking/unlocking host_lock.
|
|
*
|
|
* Return value
|
|
* SUCCESS or FAILED
|
|
*/
|
|
static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd)
|
|
{
|
|
scmd_printk(KERN_INFO, scmd,
|
|
"resetting device due to an I/O command timeout.\n");
|
|
return pmcraid_reset_device(scmd,
|
|
PMCRAID_INTERNAL_TIMEOUT,
|
|
RESET_DEVICE_LUN);
|
|
}
|
|
|
|
static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd)
|
|
{
|
|
scmd_printk(KERN_INFO, scmd,
|
|
"Doing bus reset due to an I/O command timeout.\n");
|
|
return pmcraid_reset_device(scmd,
|
|
PMCRAID_RESET_BUS_TIMEOUT,
|
|
RESET_DEVICE_BUS);
|
|
}
|
|
|
|
static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd)
|
|
{
|
|
scmd_printk(KERN_INFO, scmd,
|
|
"Doing target reset due to an I/O command timeout.\n");
|
|
return pmcraid_reset_device(scmd,
|
|
PMCRAID_INTERNAL_TIMEOUT,
|
|
RESET_DEVICE_TARGET);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_eh_host_reset_handler - adapter reset handler callback
|
|
*
|
|
* @scmd: pointer to scsi_cmd that was sent to a resource of adapter
|
|
*
|
|
* Initiates adapter reset to bring it up to operational state
|
|
*
|
|
* Return value
|
|
* SUCCESS or FAILED
|
|
*/
|
|
static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd)
|
|
{
|
|
unsigned long interval = 10000; /* 10 seconds interval */
|
|
int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval;
|
|
struct pmcraid_instance *pinstance =
|
|
(struct pmcraid_instance *)(scmd->device->host->hostdata);
|
|
|
|
|
|
/* wait for an additional 150 seconds just in case firmware could come
|
|
* up and if it could complete all the pending commands excluding the
|
|
* two HCAM (CCN and LDN).
|
|
*/
|
|
while (waits--) {
|
|
if (atomic_read(&pinstance->outstanding_cmds) <=
|
|
PMCRAID_MAX_HCAM_CMD)
|
|
return SUCCESS;
|
|
msleep(interval);
|
|
}
|
|
|
|
dev_err(&pinstance->pdev->dev,
|
|
"Adapter being reset due to an I/O command timeout.\n");
|
|
return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_task_attributes - Translate SPI Q-Tags to task attributes
|
|
* @scsi_cmd: scsi command struct
|
|
*
|
|
* Return value
|
|
* number of tags or 0 if the task is not tagged
|
|
*/
|
|
static u8 pmcraid_task_attributes(struct scsi_cmnd *scsi_cmd)
|
|
{
|
|
char tag[2];
|
|
u8 rc = 0;
|
|
|
|
if (scsi_populate_tag_msg(scsi_cmd, tag)) {
|
|
switch (tag[0]) {
|
|
case MSG_SIMPLE_TAG:
|
|
rc = TASK_TAG_SIMPLE;
|
|
break;
|
|
case MSG_HEAD_TAG:
|
|
rc = TASK_TAG_QUEUE_HEAD;
|
|
break;
|
|
case MSG_ORDERED_TAG:
|
|
rc = TASK_TAG_ORDERED;
|
|
break;
|
|
};
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
/**
|
|
* pmcraid_init_ioadls - initializes IOADL related fields in IOARCB
|
|
* @cmd: pmcraid command struct
|
|
* @sgcount: count of scatter-gather elements
|
|
*
|
|
* Return value
|
|
* returns pointer pmcraid_ioadl_desc, initialized to point to internal
|
|
* or external IOADLs
|
|
*/
|
|
struct pmcraid_ioadl_desc *
|
|
pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount)
|
|
{
|
|
struct pmcraid_ioadl_desc *ioadl;
|
|
struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
|
int ioadl_count = 0;
|
|
|
|
if (ioarcb->add_cmd_param_length)
|
|
ioadl_count = DIV_ROUND_UP(ioarcb->add_cmd_param_length, 16);
|
|
ioarcb->ioadl_length =
|
|
sizeof(struct pmcraid_ioadl_desc) * sgcount;
|
|
|
|
if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) {
|
|
/* external ioadls start at offset 0x80 from control_block
|
|
* structure, re-using 24 out of 27 ioadls part of IOARCB.
|
|
* It is necessary to indicate to firmware that driver is
|
|
* using ioadls to be treated as external to IOARCB.
|
|
*/
|
|
ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
|
|
ioarcb->ioadl_bus_addr =
|
|
cpu_to_le64((cmd->ioa_cb_bus_addr) +
|
|
offsetof(struct pmcraid_ioarcb,
|
|
add_data.u.ioadl[3]));
|
|
ioadl = &ioarcb->add_data.u.ioadl[3];
|
|
} else {
|
|
ioarcb->ioadl_bus_addr =
|
|
cpu_to_le64((cmd->ioa_cb_bus_addr) +
|
|
offsetof(struct pmcraid_ioarcb,
|
|
add_data.u.ioadl[ioadl_count]));
|
|
|
|
ioadl = &ioarcb->add_data.u.ioadl[ioadl_count];
|
|
ioarcb->ioarcb_bus_addr |=
|
|
DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8);
|
|
}
|
|
|
|
return ioadl;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_build_ioadl - Build a scatter/gather list and map the buffer
|
|
* @pinstance: pointer to adapter instance structure
|
|
* @cmd: pmcraid command struct
|
|
*
|
|
* This function is invoked by queuecommand entry point while sending a command
|
|
* to firmware. This builds ioadl descriptors and sets up ioarcb fields.
|
|
*
|
|
* Return value:
|
|
* 0 on success or -1 on failure
|
|
*/
|
|
static int pmcraid_build_ioadl(
|
|
struct pmcraid_instance *pinstance,
|
|
struct pmcraid_cmd *cmd
|
|
)
|
|
{
|
|
int i, nseg;
|
|
struct scatterlist *sglist;
|
|
|
|
struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
|
|
struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
|
|
struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
|
|
|
|
u32 length = scsi_bufflen(scsi_cmd);
|
|
|
|
if (!length)
|
|
return 0;
|
|
|
|
nseg = scsi_dma_map(scsi_cmd);
|
|
|
|
if (nseg < 0) {
|
|
scmd_printk(KERN_ERR, scsi_cmd, "scsi_map_dma failed!\n");
|
|
return -1;
|
|
} else if (nseg > PMCRAID_MAX_IOADLS) {
|
|
scsi_dma_unmap(scsi_cmd);
|
|
scmd_printk(KERN_ERR, scsi_cmd,
|
|
"sg count is (%d) more than allowed!\n", nseg);
|
|
return -1;
|
|
}
|
|
|
|
/* Initialize IOARCB data transfer length fields */
|
|
if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE)
|
|
ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
|
|
|
|
ioarcb->request_flags0 |= NO_LINK_DESCS;
|
|
ioarcb->data_transfer_length = cpu_to_le32(length);
|
|
ioadl = pmcraid_init_ioadls(cmd, nseg);
|
|
|
|
/* Initialize IOADL descriptor addresses */
|
|
scsi_for_each_sg(scsi_cmd, sglist, nseg, i) {
|
|
ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist));
|
|
ioadl[i].address = cpu_to_le64(sg_dma_address(sglist));
|
|
ioadl[i].flags = 0;
|
|
}
|
|
/* setup last descriptor */
|
|
ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_free_sglist - Frees an allocated SG buffer list
|
|
* @sglist: scatter/gather list pointer
|
|
*
|
|
* Free a DMA'able memory previously allocated with pmcraid_alloc_sglist
|
|
*
|
|
* Return value:
|
|
* none
|
|
*/
|
|
static void pmcraid_free_sglist(struct pmcraid_sglist *sglist)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < sglist->num_sg; i++)
|
|
__free_pages(sg_page(&(sglist->scatterlist[i])),
|
|
sglist->order);
|
|
|
|
kfree(sglist);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_alloc_sglist - Allocates memory for a SG list
|
|
* @buflen: buffer length
|
|
*
|
|
* Allocates a DMA'able buffer in chunks and assembles a scatter/gather
|
|
* list.
|
|
*
|
|
* Return value
|
|
* pointer to sglist / NULL on failure
|
|
*/
|
|
static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen)
|
|
{
|
|
struct pmcraid_sglist *sglist;
|
|
struct scatterlist *scatterlist;
|
|
struct page *page;
|
|
int num_elem, i, j;
|
|
int sg_size;
|
|
int order;
|
|
int bsize_elem;
|
|
|
|
sg_size = buflen / (PMCRAID_MAX_IOADLS - 1);
|
|
order = (sg_size > 0) ? get_order(sg_size) : 0;
|
|
bsize_elem = PAGE_SIZE * (1 << order);
|
|
|
|
/* Determine the actual number of sg entries needed */
|
|
if (buflen % bsize_elem)
|
|
num_elem = (buflen / bsize_elem) + 1;
|
|
else
|
|
num_elem = buflen / bsize_elem;
|
|
|
|
/* Allocate a scatter/gather list for the DMA */
|
|
sglist = kzalloc(sizeof(struct pmcraid_sglist) +
|
|
(sizeof(struct scatterlist) * (num_elem - 1)),
|
|
GFP_KERNEL);
|
|
|
|
if (sglist == NULL)
|
|
return NULL;
|
|
|
|
scatterlist = sglist->scatterlist;
|
|
sg_init_table(scatterlist, num_elem);
|
|
sglist->order = order;
|
|
sglist->num_sg = num_elem;
|
|
sg_size = buflen;
|
|
|
|
for (i = 0; i < num_elem; i++) {
|
|
page = alloc_pages(GFP_KERNEL|GFP_DMA|__GFP_ZERO, order);
|
|
if (!page) {
|
|
for (j = i - 1; j >= 0; j--)
|
|
__free_pages(sg_page(&scatterlist[j]), order);
|
|
kfree(sglist);
|
|
return NULL;
|
|
}
|
|
|
|
sg_set_page(&scatterlist[i], page,
|
|
sg_size < bsize_elem ? sg_size : bsize_elem, 0);
|
|
sg_size -= bsize_elem;
|
|
}
|
|
|
|
return sglist;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list
|
|
* @sglist: scatter/gather list pointer
|
|
* @buffer: buffer pointer
|
|
* @len: buffer length
|
|
* @direction: data transfer direction
|
|
*
|
|
* Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist
|
|
*
|
|
* Return value:
|
|
* 0 on success / other on failure
|
|
*/
|
|
static int pmcraid_copy_sglist(
|
|
struct pmcraid_sglist *sglist,
|
|
unsigned long buffer,
|
|
u32 len,
|
|
int direction
|
|
)
|
|
{
|
|
struct scatterlist *scatterlist;
|
|
void *kaddr;
|
|
int bsize_elem;
|
|
int i;
|
|
int rc = 0;
|
|
|
|
/* Determine the actual number of bytes per element */
|
|
bsize_elem = PAGE_SIZE * (1 << sglist->order);
|
|
|
|
scatterlist = sglist->scatterlist;
|
|
|
|
for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) {
|
|
struct page *page = sg_page(&scatterlist[i]);
|
|
|
|
kaddr = kmap(page);
|
|
if (direction == DMA_TO_DEVICE)
|
|
rc = __copy_from_user(kaddr,
|
|
(void *)buffer,
|
|
bsize_elem);
|
|
else
|
|
rc = __copy_to_user((void *)buffer, kaddr, bsize_elem);
|
|
|
|
kunmap(page);
|
|
|
|
if (rc) {
|
|
pmcraid_err("failed to copy user data into sg list\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
scatterlist[i].length = bsize_elem;
|
|
}
|
|
|
|
if (len % bsize_elem) {
|
|
struct page *page = sg_page(&scatterlist[i]);
|
|
|
|
kaddr = kmap(page);
|
|
|
|
if (direction == DMA_TO_DEVICE)
|
|
rc = __copy_from_user(kaddr,
|
|
(void *)buffer,
|
|
len % bsize_elem);
|
|
else
|
|
rc = __copy_to_user((void *)buffer,
|
|
kaddr,
|
|
len % bsize_elem);
|
|
|
|
kunmap(page);
|
|
|
|
scatterlist[i].length = len % bsize_elem;
|
|
}
|
|
|
|
if (rc) {
|
|
pmcraid_err("failed to copy user data into sg list\n");
|
|
rc = -EFAULT;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_queuecommand - Queue a mid-layer request
|
|
* @scsi_cmd: scsi command struct
|
|
* @done: done function
|
|
*
|
|
* This function queues a request generated by the mid-layer. Midlayer calls
|
|
* this routine within host->lock. Some of the functions called by queuecommand
|
|
* would use cmd block queue locks (free_pool_lock and pending_pool_lock)
|
|
*
|
|
* Return value:
|
|
* 0 on success
|
|
* SCSI_MLQUEUE_DEVICE_BUSY if device is busy
|
|
* SCSI_MLQUEUE_HOST_BUSY if host is busy
|
|
*/
|
|
static int pmcraid_queuecommand_lck(
|
|
struct scsi_cmnd *scsi_cmd,
|
|
void (*done) (struct scsi_cmnd *)
|
|
)
|
|
{
|
|
struct pmcraid_instance *pinstance;
|
|
struct pmcraid_resource_entry *res;
|
|
struct pmcraid_ioarcb *ioarcb;
|
|
struct pmcraid_cmd *cmd;
|
|
u32 fw_version;
|
|
int rc = 0;
|
|
|
|
pinstance =
|
|
(struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
|
|
fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
|
|
scsi_cmd->scsi_done = done;
|
|
res = scsi_cmd->device->hostdata;
|
|
scsi_cmd->result = (DID_OK << 16);
|
|
|
|
/* if adapter is marked as dead, set result to DID_NO_CONNECT complete
|
|
* the command
|
|
*/
|
|
if (pinstance->ioa_state == IOA_STATE_DEAD) {
|
|
pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
|
|
scsi_cmd->result = (DID_NO_CONNECT << 16);
|
|
scsi_cmd->scsi_done(scsi_cmd);
|
|
return 0;
|
|
}
|
|
|
|
/* If IOA reset is in progress, can't queue the commands */
|
|
if (pinstance->ioa_reset_in_progress)
|
|
return SCSI_MLQUEUE_HOST_BUSY;
|
|
|
|
/* Firmware doesn't support SYNCHRONIZE_CACHE command (0x35), complete
|
|
* the command here itself with success return
|
|
*/
|
|
if (scsi_cmd->cmnd[0] == SYNCHRONIZE_CACHE) {
|
|
pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n");
|
|
scsi_cmd->scsi_done(scsi_cmd);
|
|
return 0;
|
|
}
|
|
|
|
/* initialize the command and IOARCB to be sent to IOA */
|
|
cmd = pmcraid_get_free_cmd(pinstance);
|
|
|
|
if (cmd == NULL) {
|
|
pmcraid_err("free command block is not available\n");
|
|
return SCSI_MLQUEUE_HOST_BUSY;
|
|
}
|
|
|
|
cmd->scsi_cmd = scsi_cmd;
|
|
ioarcb = &(cmd->ioa_cb->ioarcb);
|
|
memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
|
|
ioarcb->resource_handle = res->cfg_entry.resource_handle;
|
|
ioarcb->request_type = REQ_TYPE_SCSI;
|
|
|
|
/* set hrrq number where the IOA should respond to. Note that all cmds
|
|
* generated internally uses hrrq_id 0, exception to this is the cmd
|
|
* block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
|
|
* hrrq_id assigned here in queuecommand
|
|
*/
|
|
ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
|
|
pinstance->num_hrrq;
|
|
cmd->cmd_done = pmcraid_io_done;
|
|
|
|
if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) {
|
|
if (scsi_cmd->underflow == 0)
|
|
ioarcb->request_flags0 |= INHIBIT_UL_CHECK;
|
|
|
|
if (res->sync_reqd) {
|
|
ioarcb->request_flags0 |= SYNC_COMPLETE;
|
|
res->sync_reqd = 0;
|
|
}
|
|
|
|
ioarcb->request_flags0 |= NO_LINK_DESCS;
|
|
ioarcb->request_flags1 |= pmcraid_task_attributes(scsi_cmd);
|
|
|
|
if (RES_IS_GSCSI(res->cfg_entry))
|
|
ioarcb->request_flags1 |= DELAY_AFTER_RESET;
|
|
}
|
|
|
|
rc = pmcraid_build_ioadl(pinstance, cmd);
|
|
|
|
pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
|
|
le32_to_cpu(ioarcb->response_handle) >> 2,
|
|
scsi_cmd->cmnd[0], pinstance->host->unique_id,
|
|
RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID :
|
|
PMCRAID_PHYS_BUS_ID,
|
|
RES_IS_VSET(res->cfg_entry) ?
|
|
(fw_version <= PMCRAID_FW_VERSION_1 ?
|
|
res->cfg_entry.unique_flags1 :
|
|
res->cfg_entry.array_id & 0xFF) :
|
|
RES_TARGET(res->cfg_entry.resource_address),
|
|
RES_LUN(res->cfg_entry.resource_address));
|
|
|
|
if (likely(rc == 0)) {
|
|
_pmcraid_fire_command(cmd);
|
|
} else {
|
|
pmcraid_err("queuecommand could not build ioadl\n");
|
|
pmcraid_return_cmd(cmd);
|
|
rc = SCSI_MLQUEUE_HOST_BUSY;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static DEF_SCSI_QCMD(pmcraid_queuecommand)
|
|
|
|
/**
|
|
* pmcraid_open -char node "open" entry, allowed only users with admin access
|
|
*/
|
|
static int pmcraid_chr_open(struct inode *inode, struct file *filep)
|
|
{
|
|
struct pmcraid_instance *pinstance;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EACCES;
|
|
|
|
/* Populate adapter instance * pointer for use by ioctl */
|
|
pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev);
|
|
filep->private_data = pinstance;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_fasync - Async notifier registration from applications
|
|
*
|
|
* This function adds the calling process to a driver global queue. When an
|
|
* event occurs, SIGIO will be sent to all processes in this queue.
|
|
*/
|
|
static int pmcraid_chr_fasync(int fd, struct file *filep, int mode)
|
|
{
|
|
struct pmcraid_instance *pinstance;
|
|
int rc;
|
|
|
|
pinstance = filep->private_data;
|
|
mutex_lock(&pinstance->aen_queue_lock);
|
|
rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue);
|
|
mutex_unlock(&pinstance->aen_queue_lock);
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
/**
|
|
* pmcraid_build_passthrough_ioadls - builds SG elements for passthrough
|
|
* commands sent over IOCTL interface
|
|
*
|
|
* @cmd : pointer to struct pmcraid_cmd
|
|
* @buflen : length of the request buffer
|
|
* @direction : data transfer direction
|
|
*
|
|
* Return value
|
|
* 0 on success, non-zero error code on failure
|
|
*/
|
|
static int pmcraid_build_passthrough_ioadls(
|
|
struct pmcraid_cmd *cmd,
|
|
int buflen,
|
|
int direction
|
|
)
|
|
{
|
|
struct pmcraid_sglist *sglist = NULL;
|
|
struct scatterlist *sg = NULL;
|
|
struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
|
struct pmcraid_ioadl_desc *ioadl;
|
|
int i;
|
|
|
|
sglist = pmcraid_alloc_sglist(buflen);
|
|
|
|
if (!sglist) {
|
|
pmcraid_err("can't allocate memory for passthrough SGls\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
sglist->num_dma_sg = pci_map_sg(cmd->drv_inst->pdev,
|
|
sglist->scatterlist,
|
|
sglist->num_sg, direction);
|
|
|
|
if (!sglist->num_dma_sg || sglist->num_dma_sg > PMCRAID_MAX_IOADLS) {
|
|
dev_err(&cmd->drv_inst->pdev->dev,
|
|
"Failed to map passthrough buffer!\n");
|
|
pmcraid_free_sglist(sglist);
|
|
return -EIO;
|
|
}
|
|
|
|
cmd->sglist = sglist;
|
|
ioarcb->request_flags0 |= NO_LINK_DESCS;
|
|
|
|
ioadl = pmcraid_init_ioadls(cmd, sglist->num_dma_sg);
|
|
|
|
/* Initialize IOADL descriptor addresses */
|
|
for_each_sg(sglist->scatterlist, sg, sglist->num_dma_sg, i) {
|
|
ioadl[i].data_len = cpu_to_le32(sg_dma_len(sg));
|
|
ioadl[i].address = cpu_to_le64(sg_dma_address(sg));
|
|
ioadl[i].flags = 0;
|
|
}
|
|
|
|
/* setup the last descriptor */
|
|
ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* pmcraid_release_passthrough_ioadls - release passthrough ioadls
|
|
*
|
|
* @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated
|
|
* @buflen: size of the request buffer
|
|
* @direction: data transfer direction
|
|
*
|
|
* Return value
|
|
* 0 on success, non-zero error code on failure
|
|
*/
|
|
static void pmcraid_release_passthrough_ioadls(
|
|
struct pmcraid_cmd *cmd,
|
|
int buflen,
|
|
int direction
|
|
)
|
|
{
|
|
struct pmcraid_sglist *sglist = cmd->sglist;
|
|
|
|
if (buflen > 0) {
|
|
pci_unmap_sg(cmd->drv_inst->pdev,
|
|
sglist->scatterlist,
|
|
sglist->num_sg,
|
|
direction);
|
|
pmcraid_free_sglist(sglist);
|
|
cmd->sglist = NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pmcraid_ioctl_passthrough - handling passthrough IOCTL commands
|
|
*
|
|
* @pinstance: pointer to adapter instance structure
|
|
* @cmd: ioctl code
|
|
* @arg: pointer to pmcraid_passthrough_buffer user buffer
|
|
*
|
|
* Return value
|
|
* 0 on success, non-zero error code on failure
|
|
*/
|
|
static long pmcraid_ioctl_passthrough(
|
|
struct pmcraid_instance *pinstance,
|
|
unsigned int ioctl_cmd,
|
|
unsigned int buflen,
|
|
unsigned long arg
|
|
)
|
|
{
|
|
struct pmcraid_passthrough_ioctl_buffer *buffer;
|
|
struct pmcraid_ioarcb *ioarcb;
|
|
struct pmcraid_cmd *cmd;
|
|
struct pmcraid_cmd *cancel_cmd;
|
|
unsigned long request_buffer;
|
|
unsigned long request_offset;
|
|
unsigned long lock_flags;
|
|
void *ioasa;
|
|
u32 ioasc;
|
|
int request_size;
|
|
int buffer_size;
|
|
u8 access, direction;
|
|
int rc = 0;
|
|
|
|
/* If IOA reset is in progress, wait 10 secs for reset to complete */
|
|
if (pinstance->ioa_reset_in_progress) {
|
|
rc = wait_event_interruptible_timeout(
|
|
pinstance->reset_wait_q,
|
|
!pinstance->ioa_reset_in_progress,
|
|
msecs_to_jiffies(10000));
|
|
|
|
if (!rc)
|
|
return -ETIMEDOUT;
|
|
else if (rc < 0)
|
|
return -ERESTARTSYS;
|
|
}
|
|
|
|
/* If adapter is not in operational state, return error */
|
|
if (pinstance->ioa_state != IOA_STATE_OPERATIONAL) {
|
|
pmcraid_err("IOA is not operational\n");
|
|
return -ENOTTY;
|
|
}
|
|
|
|
buffer_size = sizeof(struct pmcraid_passthrough_ioctl_buffer);
|
|
buffer = kmalloc(buffer_size, GFP_KERNEL);
|
|
|
|
if (!buffer) {
|
|
pmcraid_err("no memory for passthrough buffer\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
request_offset =
|
|
offsetof(struct pmcraid_passthrough_ioctl_buffer, request_buffer);
|
|
|
|
request_buffer = arg + request_offset;
|
|
|
|
rc = __copy_from_user(buffer,
|
|
(struct pmcraid_passthrough_ioctl_buffer *) arg,
|
|
sizeof(struct pmcraid_passthrough_ioctl_buffer));
|
|
|
|
ioasa =
|
|
(void *)(arg +
|
|
offsetof(struct pmcraid_passthrough_ioctl_buffer, ioasa));
|
|
|
|
if (rc) {
|
|
pmcraid_err("ioctl: can't copy passthrough buffer\n");
|
|
rc = -EFAULT;
|
|
goto out_free_buffer;
|
|
}
|
|
|
|
request_size = buffer->ioarcb.data_transfer_length;
|
|
|
|
if (buffer->ioarcb.request_flags0 & TRANSFER_DIR_WRITE) {
|
|
access = VERIFY_READ;
|
|
direction = DMA_TO_DEVICE;
|
|
} else {
|
|
access = VERIFY_WRITE;
|
|
direction = DMA_FROM_DEVICE;
|
|
}
|
|
|
|
if (request_size > 0) {
|
|
rc = access_ok(access, arg, request_offset + request_size);
|
|
|
|
if (!rc) {
|
|
rc = -EFAULT;
|
|
goto out_free_buffer;
|
|
}
|
|
} else if (request_size < 0) {
|
|
rc = -EINVAL;
|
|
goto out_free_buffer;
|
|
}
|
|
|
|
/* check if we have any additional command parameters */
|
|
if (buffer->ioarcb.add_cmd_param_length > PMCRAID_ADD_CMD_PARAM_LEN) {
|
|
rc = -EINVAL;
|
|
goto out_free_buffer;
|
|
}
|
|
|
|
cmd = pmcraid_get_free_cmd(pinstance);
|
|
|
|
if (!cmd) {
|
|
pmcraid_err("free command block is not available\n");
|
|
rc = -ENOMEM;
|
|
goto out_free_buffer;
|
|
}
|
|
|
|
cmd->scsi_cmd = NULL;
|
|
ioarcb = &(cmd->ioa_cb->ioarcb);
|
|
|
|
/* Copy the user-provided IOARCB stuff field by field */
|
|
ioarcb->resource_handle = buffer->ioarcb.resource_handle;
|
|
ioarcb->data_transfer_length = buffer->ioarcb.data_transfer_length;
|
|
ioarcb->cmd_timeout = buffer->ioarcb.cmd_timeout;
|
|
ioarcb->request_type = buffer->ioarcb.request_type;
|
|
ioarcb->request_flags0 = buffer->ioarcb.request_flags0;
|
|
ioarcb->request_flags1 = buffer->ioarcb.request_flags1;
|
|
memcpy(ioarcb->cdb, buffer->ioarcb.cdb, PMCRAID_MAX_CDB_LEN);
|
|
|
|
if (buffer->ioarcb.add_cmd_param_length) {
|
|
ioarcb->add_cmd_param_length =
|
|
buffer->ioarcb.add_cmd_param_length;
|
|
ioarcb->add_cmd_param_offset =
|
|
buffer->ioarcb.add_cmd_param_offset;
|
|
memcpy(ioarcb->add_data.u.add_cmd_params,
|
|
buffer->ioarcb.add_data.u.add_cmd_params,
|
|
buffer->ioarcb.add_cmd_param_length);
|
|
}
|
|
|
|
/* set hrrq number where the IOA should respond to. Note that all cmds
|
|
* generated internally uses hrrq_id 0, exception to this is the cmd
|
|
* block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
|
|
* hrrq_id assigned here in queuecommand
|
|
*/
|
|
ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
|
|
pinstance->num_hrrq;
|
|
|
|
if (request_size) {
|
|
rc = pmcraid_build_passthrough_ioadls(cmd,
|
|
request_size,
|
|
direction);
|
|
if (rc) {
|
|
pmcraid_err("couldn't build passthrough ioadls\n");
|
|
goto out_free_buffer;
|
|
}
|
|
} else if (request_size < 0) {
|
|
rc = -EINVAL;
|
|
goto out_free_buffer;
|
|
}
|
|
|
|
/* If data is being written into the device, copy the data from user
|
|
* buffers
|
|
*/
|
|
if (direction == DMA_TO_DEVICE && request_size > 0) {
|
|
rc = pmcraid_copy_sglist(cmd->sglist,
|
|
request_buffer,
|
|
request_size,
|
|
direction);
|
|
if (rc) {
|
|
pmcraid_err("failed to copy user buffer\n");
|
|
goto out_free_sglist;
|
|
}
|
|
}
|
|
|
|
/* passthrough ioctl is a blocking command so, put the user to sleep
|
|
* until timeout. Note that a timeout value of 0 means, do timeout.
|
|
*/
|
|
cmd->cmd_done = pmcraid_internal_done;
|
|
init_completion(&cmd->wait_for_completion);
|
|
cmd->completion_req = 1;
|
|
|
|
pmcraid_info("command(%d) (CDB[0] = %x) for %x\n",
|
|
le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
|
|
cmd->ioa_cb->ioarcb.cdb[0],
|
|
le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle));
|
|
|
|
spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
|
_pmcraid_fire_command(cmd);
|
|
spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
|
|
|
/* NOTE ! Remove the below line once abort_task is implemented
|
|
* in firmware. This line disables ioctl command timeout handling logic
|
|
* similar to IO command timeout handling, making ioctl commands to wait
|
|
* until the command completion regardless of timeout value specified in
|
|
* ioarcb
|
|
*/
|
|
buffer->ioarcb.cmd_timeout = 0;
|
|
|
|
/* If command timeout is specified put caller to wait till that time,
|
|
* otherwise it would be blocking wait. If command gets timed out, it
|
|
* will be aborted.
|
|
*/
|
|
if (buffer->ioarcb.cmd_timeout == 0) {
|
|
wait_for_completion(&cmd->wait_for_completion);
|
|
} else if (!wait_for_completion_timeout(
|
|
&cmd->wait_for_completion,
|
|
msecs_to_jiffies(buffer->ioarcb.cmd_timeout * 1000))) {
|
|
|
|
pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n",
|
|
le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle >> 2),
|
|
cmd->ioa_cb->ioarcb.cdb[0]);
|
|
|
|
spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
|
cancel_cmd = pmcraid_abort_cmd(cmd);
|
|
spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
|
|
|
if (cancel_cmd) {
|
|
wait_for_completion(&cancel_cmd->wait_for_completion);
|
|
ioasc = cancel_cmd->ioa_cb->ioasa.ioasc;
|
|
pmcraid_return_cmd(cancel_cmd);
|
|
|
|
/* if abort task couldn't find the command i.e it got
|
|
* completed prior to aborting, return good completion.
|
|
* if command got aborted successfully or there was IOA
|
|
* reset due to abort task itself getting timedout then
|
|
* return -ETIMEDOUT
|
|
*/
|
|
if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
|
|
PMCRAID_IOASC_SENSE_KEY(ioasc) == 0x00) {
|
|
if (ioasc != PMCRAID_IOASC_GC_IOARCB_NOTFOUND)
|
|
rc = -ETIMEDOUT;
|
|
goto out_handle_response;
|
|
}
|
|
}
|
|
|
|
/* no command block for abort task or abort task failed to abort
|
|
* the IOARCB, then wait for 150 more seconds and initiate reset
|
|
* sequence after timeout
|
|
*/
|
|
if (!wait_for_completion_timeout(
|
|
&cmd->wait_for_completion,
|
|
msecs_to_jiffies(150 * 1000))) {
|
|
pmcraid_reset_bringup(cmd->drv_inst);
|
|
rc = -ETIMEDOUT;
|
|
}
|
|
}
|
|
|
|
out_handle_response:
|
|
/* copy entire IOASA buffer and return IOCTL success.
|
|
* If copying IOASA to user-buffer fails, return
|
|
* EFAULT
|
|
*/
|
|
if (copy_to_user(ioasa, &cmd->ioa_cb->ioasa,
|
|
sizeof(struct pmcraid_ioasa))) {
|
|
pmcraid_err("failed to copy ioasa buffer to user\n");
|
|
rc = -EFAULT;
|
|
}
|
|
|
|
/* If the data transfer was from device, copy the data onto user
|
|
* buffers
|
|
*/
|
|
else if (direction == DMA_FROM_DEVICE && request_size > 0) {
|
|
rc = pmcraid_copy_sglist(cmd->sglist,
|
|
request_buffer,
|
|
request_size,
|
|
direction);
|
|
if (rc) {
|
|
pmcraid_err("failed to copy user buffer\n");
|
|
rc = -EFAULT;
|
|
}
|
|
}
|
|
|
|
out_free_sglist:
|
|
pmcraid_release_passthrough_ioadls(cmd, request_size, direction);
|
|
pmcraid_return_cmd(cmd);
|
|
|
|
out_free_buffer:
|
|
kfree(buffer);
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
* pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself
|
|
*
|
|
* @pinstance: pointer to adapter instance structure
|
|
* @cmd: ioctl command passed in
|
|
* @buflen: length of user_buffer
|
|
* @user_buffer: user buffer pointer
|
|
*
|
|
* Return Value
|
|
* 0 in case of success, otherwise appropriate error code
|
|
*/
|
|
static long pmcraid_ioctl_driver(
|
|
struct pmcraid_instance *pinstance,
|
|
unsigned int cmd,
|
|
unsigned int buflen,
|
|
void __user *user_buffer
|
|
)
|
|
{
|
|
int rc = -ENOSYS;
|
|
|
|
if (!access_ok(VERIFY_READ, user_buffer, _IOC_SIZE(cmd))) {
|
|
pmcraid_err("ioctl_driver: access fault in request buffer\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
switch (cmd) {
|
|
case PMCRAID_IOCTL_RESET_ADAPTER:
|
|
pmcraid_reset_bringup(pinstance);
|
|
rc = 0;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_check_ioctl_buffer - check for proper access to user buffer
|
|
*
|
|
* @cmd: ioctl command
|
|
* @arg: user buffer
|
|
* @hdr: pointer to kernel memory for pmcraid_ioctl_header
|
|
*
|
|
* Return Value
|
|
* negetive error code if there are access issues, otherwise zero.
|
|
* Upon success, returns ioctl header copied out of user buffer.
|
|
*/
|
|
|
|
static int pmcraid_check_ioctl_buffer(
|
|
int cmd,
|
|
void __user *arg,
|
|
struct pmcraid_ioctl_header *hdr
|
|
)
|
|
{
|
|
int rc = 0;
|
|
int access = VERIFY_READ;
|
|
|
|
if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) {
|
|
pmcraid_err("couldn't copy ioctl header from user buffer\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
/* check for valid driver signature */
|
|
rc = memcmp(hdr->signature,
|
|
PMCRAID_IOCTL_SIGNATURE,
|
|
sizeof(hdr->signature));
|
|
if (rc) {
|
|
pmcraid_err("signature verification failed\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* check for appropriate buffer access */
|
|
if ((_IOC_DIR(cmd) & _IOC_READ) == _IOC_READ)
|
|
access = VERIFY_WRITE;
|
|
|
|
rc = access_ok(access,
|
|
(arg + sizeof(struct pmcraid_ioctl_header)),
|
|
hdr->buffer_length);
|
|
if (!rc) {
|
|
pmcraid_err("access failed for user buffer of size %d\n",
|
|
hdr->buffer_length);
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_ioctl - char node ioctl entry point
|
|
*/
|
|
static long pmcraid_chr_ioctl(
|
|
struct file *filep,
|
|
unsigned int cmd,
|
|
unsigned long arg
|
|
)
|
|
{
|
|
struct pmcraid_instance *pinstance = NULL;
|
|
struct pmcraid_ioctl_header *hdr = NULL;
|
|
int retval = -ENOTTY;
|
|
|
|
hdr = kmalloc(sizeof(struct pmcraid_ioctl_header), GFP_KERNEL);
|
|
|
|
if (!hdr) {
|
|
pmcraid_err("failed to allocate memory for ioctl header\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
retval = pmcraid_check_ioctl_buffer(cmd, (void *)arg, hdr);
|
|
|
|
if (retval) {
|
|
pmcraid_info("chr_ioctl: header check failed\n");
|
|
kfree(hdr);
|
|
return retval;
|
|
}
|
|
|
|
pinstance = filep->private_data;
|
|
|
|
if (!pinstance) {
|
|
pmcraid_info("adapter instance is not found\n");
|
|
kfree(hdr);
|
|
return -ENOTTY;
|
|
}
|
|
|
|
switch (_IOC_TYPE(cmd)) {
|
|
|
|
case PMCRAID_PASSTHROUGH_IOCTL:
|
|
/* If ioctl code is to download microcode, we need to block
|
|
* mid-layer requests.
|
|
*/
|
|
if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
|
|
scsi_block_requests(pinstance->host);
|
|
|
|
retval = pmcraid_ioctl_passthrough(pinstance,
|
|
cmd,
|
|
hdr->buffer_length,
|
|
arg);
|
|
|
|
if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
|
|
scsi_unblock_requests(pinstance->host);
|
|
break;
|
|
|
|
case PMCRAID_DRIVER_IOCTL:
|
|
arg += sizeof(struct pmcraid_ioctl_header);
|
|
retval = pmcraid_ioctl_driver(pinstance,
|
|
cmd,
|
|
hdr->buffer_length,
|
|
(void __user *)arg);
|
|
break;
|
|
|
|
default:
|
|
retval = -ENOTTY;
|
|
break;
|
|
}
|
|
|
|
kfree(hdr);
|
|
|
|
return retval;
|
|
}
|
|
|
|
/**
|
|
* File operations structure for management interface
|
|
*/
|
|
static const struct file_operations pmcraid_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = pmcraid_chr_open,
|
|
.fasync = pmcraid_chr_fasync,
|
|
.unlocked_ioctl = pmcraid_chr_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = pmcraid_chr_ioctl,
|
|
#endif
|
|
.llseek = noop_llseek,
|
|
};
|
|
|
|
|
|
|
|
|
|
/**
|
|
* pmcraid_show_log_level - Display adapter's error logging level
|
|
* @dev: class device struct
|
|
* @buf: buffer
|
|
*
|
|
* Return value:
|
|
* number of bytes printed to buffer
|
|
*/
|
|
static ssize_t pmcraid_show_log_level(
|
|
struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct Scsi_Host *shost = class_to_shost(dev);
|
|
struct pmcraid_instance *pinstance =
|
|
(struct pmcraid_instance *)shost->hostdata;
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_store_log_level - Change the adapter's error logging level
|
|
* @dev: class device struct
|
|
* @buf: buffer
|
|
* @count: not used
|
|
*
|
|
* Return value:
|
|
* number of bytes printed to buffer
|
|
*/
|
|
static ssize_t pmcraid_store_log_level(
|
|
struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf,
|
|
size_t count
|
|
)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct pmcraid_instance *pinstance;
|
|
unsigned long val;
|
|
|
|
if (strict_strtoul(buf, 10, &val))
|
|
return -EINVAL;
|
|
/* log-level should be from 0 to 2 */
|
|
if (val > 2)
|
|
return -EINVAL;
|
|
|
|
shost = class_to_shost(dev);
|
|
pinstance = (struct pmcraid_instance *)shost->hostdata;
|
|
pinstance->current_log_level = val;
|
|
|
|
return strlen(buf);
|
|
}
|
|
|
|
static struct device_attribute pmcraid_log_level_attr = {
|
|
.attr = {
|
|
.name = "log_level",
|
|
.mode = S_IRUGO | S_IWUSR,
|
|
},
|
|
.show = pmcraid_show_log_level,
|
|
.store = pmcraid_store_log_level,
|
|
};
|
|
|
|
/**
|
|
* pmcraid_show_drv_version - Display driver version
|
|
* @dev: class device struct
|
|
* @buf: buffer
|
|
*
|
|
* Return value:
|
|
* number of bytes printed to buffer
|
|
*/
|
|
static ssize_t pmcraid_show_drv_version(
|
|
struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf
|
|
)
|
|
{
|
|
return snprintf(buf, PAGE_SIZE, "version: %s\n",
|
|
PMCRAID_DRIVER_VERSION);
|
|
}
|
|
|
|
static struct device_attribute pmcraid_driver_version_attr = {
|
|
.attr = {
|
|
.name = "drv_version",
|
|
.mode = S_IRUGO,
|
|
},
|
|
.show = pmcraid_show_drv_version,
|
|
};
|
|
|
|
/**
|
|
* pmcraid_show_io_adapter_id - Display driver assigned adapter id
|
|
* @dev: class device struct
|
|
* @buf: buffer
|
|
*
|
|
* Return value:
|
|
* number of bytes printed to buffer
|
|
*/
|
|
static ssize_t pmcraid_show_adapter_id(
|
|
struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf
|
|
)
|
|
{
|
|
struct Scsi_Host *shost = class_to_shost(dev);
|
|
struct pmcraid_instance *pinstance =
|
|
(struct pmcraid_instance *)shost->hostdata;
|
|
u32 adapter_id = (pinstance->pdev->bus->number << 8) |
|
|
pinstance->pdev->devfn;
|
|
u32 aen_group = pmcraid_event_family.id;
|
|
|
|
return snprintf(buf, PAGE_SIZE,
|
|
"adapter id: %d\nminor: %d\naen group: %d\n",
|
|
adapter_id, MINOR(pinstance->cdev.dev), aen_group);
|
|
}
|
|
|
|
static struct device_attribute pmcraid_adapter_id_attr = {
|
|
.attr = {
|
|
.name = "adapter_id",
|
|
.mode = S_IRUGO | S_IWUSR,
|
|
},
|
|
.show = pmcraid_show_adapter_id,
|
|
};
|
|
|
|
static struct device_attribute *pmcraid_host_attrs[] = {
|
|
&pmcraid_log_level_attr,
|
|
&pmcraid_driver_version_attr,
|
|
&pmcraid_adapter_id_attr,
|
|
NULL,
|
|
};
|
|
|
|
|
|
/* host template structure for pmcraid driver */
|
|
static struct scsi_host_template pmcraid_host_template = {
|
|
.module = THIS_MODULE,
|
|
.name = PMCRAID_DRIVER_NAME,
|
|
.queuecommand = pmcraid_queuecommand,
|
|
.eh_abort_handler = pmcraid_eh_abort_handler,
|
|
.eh_bus_reset_handler = pmcraid_eh_bus_reset_handler,
|
|
.eh_target_reset_handler = pmcraid_eh_target_reset_handler,
|
|
.eh_device_reset_handler = pmcraid_eh_device_reset_handler,
|
|
.eh_host_reset_handler = pmcraid_eh_host_reset_handler,
|
|
|
|
.slave_alloc = pmcraid_slave_alloc,
|
|
.slave_configure = pmcraid_slave_configure,
|
|
.slave_destroy = pmcraid_slave_destroy,
|
|
.change_queue_depth = pmcraid_change_queue_depth,
|
|
.change_queue_type = pmcraid_change_queue_type,
|
|
.can_queue = PMCRAID_MAX_IO_CMD,
|
|
.this_id = -1,
|
|
.sg_tablesize = PMCRAID_MAX_IOADLS,
|
|
.max_sectors = PMCRAID_IOA_MAX_SECTORS,
|
|
.cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN,
|
|
.use_clustering = ENABLE_CLUSTERING,
|
|
.shost_attrs = pmcraid_host_attrs,
|
|
.proc_name = PMCRAID_DRIVER_NAME
|
|
};
|
|
|
|
/*
|
|
* pmcraid_isr_msix - implements MSI-X interrupt handling routine
|
|
* @irq: interrupt vector number
|
|
* @dev_id: pointer hrrq_vector
|
|
*
|
|
* Return Value
|
|
* IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
|
|
*/
|
|
|
|
static irqreturn_t pmcraid_isr_msix(int irq, void *dev_id)
|
|
{
|
|
struct pmcraid_isr_param *hrrq_vector;
|
|
struct pmcraid_instance *pinstance;
|
|
unsigned long lock_flags;
|
|
u32 intrs_val;
|
|
int hrrq_id;
|
|
|
|
hrrq_vector = (struct pmcraid_isr_param *)dev_id;
|
|
hrrq_id = hrrq_vector->hrrq_id;
|
|
pinstance = hrrq_vector->drv_inst;
|
|
|
|
if (!hrrq_id) {
|
|
/* Read the interrupt */
|
|
intrs_val = pmcraid_read_interrupts(pinstance);
|
|
if (intrs_val &&
|
|
((ioread32(pinstance->int_regs.host_ioa_interrupt_reg)
|
|
& DOORBELL_INTR_MSIX_CLR) == 0)) {
|
|
/* Any error interrupts including unit_check,
|
|
* initiate IOA reset.In case of unit check indicate
|
|
* to reset_sequence that IOA unit checked and prepare
|
|
* for a dump during reset sequence
|
|
*/
|
|
if (intrs_val & PMCRAID_ERROR_INTERRUPTS) {
|
|
if (intrs_val & INTRS_IOA_UNIT_CHECK)
|
|
pinstance->ioa_unit_check = 1;
|
|
|
|
pmcraid_err("ISR: error interrupts: %x \
|
|
initiating reset\n", intrs_val);
|
|
spin_lock_irqsave(pinstance->host->host_lock,
|
|
lock_flags);
|
|
pmcraid_initiate_reset(pinstance);
|
|
spin_unlock_irqrestore(
|
|
pinstance->host->host_lock,
|
|
lock_flags);
|
|
}
|
|
/* If interrupt was as part of the ioa initialization,
|
|
* clear it. Delete the timer and wakeup the
|
|
* reset engine to proceed with reset sequence
|
|
*/
|
|
if (intrs_val & INTRS_TRANSITION_TO_OPERATIONAL)
|
|
pmcraid_clr_trans_op(pinstance);
|
|
|
|
/* Clear the interrupt register by writing
|
|
* to host to ioa doorbell. Once done
|
|
* FW will clear the interrupt.
|
|
*/
|
|
iowrite32(DOORBELL_INTR_MSIX_CLR,
|
|
pinstance->int_regs.host_ioa_interrupt_reg);
|
|
ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
|
|
|
|
|
|
}
|
|
}
|
|
|
|
tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id]));
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_isr - implements legacy interrupt handling routine
|
|
*
|
|
* @irq: interrupt vector number
|
|
* @dev_id: pointer hrrq_vector
|
|
*
|
|
* Return Value
|
|
* IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
|
|
*/
|
|
static irqreturn_t pmcraid_isr(int irq, void *dev_id)
|
|
{
|
|
struct pmcraid_isr_param *hrrq_vector;
|
|
struct pmcraid_instance *pinstance;
|
|
u32 intrs;
|
|
unsigned long lock_flags;
|
|
int hrrq_id = 0;
|
|
|
|
/* In case of legacy interrupt mode where interrupts are shared across
|
|
* isrs, it may be possible that the current interrupt is not from IOA
|
|
*/
|
|
if (!dev_id) {
|
|
printk(KERN_INFO "%s(): NULL host pointer\n", __func__);
|
|
return IRQ_NONE;
|
|
}
|
|
hrrq_vector = (struct pmcraid_isr_param *)dev_id;
|
|
pinstance = hrrq_vector->drv_inst;
|
|
|
|
intrs = pmcraid_read_interrupts(pinstance);
|
|
|
|
if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0))
|
|
return IRQ_NONE;
|
|
|
|
/* Any error interrupts including unit_check, initiate IOA reset.
|
|
* In case of unit check indicate to reset_sequence that IOA unit
|
|
* checked and prepare for a dump during reset sequence
|
|
*/
|
|
if (intrs & PMCRAID_ERROR_INTERRUPTS) {
|
|
|
|
if (intrs & INTRS_IOA_UNIT_CHECK)
|
|
pinstance->ioa_unit_check = 1;
|
|
|
|
iowrite32(intrs,
|
|
pinstance->int_regs.ioa_host_interrupt_clr_reg);
|
|
pmcraid_err("ISR: error interrupts: %x initiating reset\n",
|
|
intrs);
|
|
intrs = ioread32(
|
|
pinstance->int_regs.ioa_host_interrupt_clr_reg);
|
|
spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
|
pmcraid_initiate_reset(pinstance);
|
|
spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
|
} else {
|
|
/* If interrupt was as part of the ioa initialization,
|
|
* clear. Delete the timer and wakeup the
|
|
* reset engine to proceed with reset sequence
|
|
*/
|
|
if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
|
|
pmcraid_clr_trans_op(pinstance);
|
|
} else {
|
|
iowrite32(intrs,
|
|
pinstance->int_regs.ioa_host_interrupt_clr_reg);
|
|
ioread32(
|
|
pinstance->int_regs.ioa_host_interrupt_clr_reg);
|
|
|
|
tasklet_schedule(
|
|
&(pinstance->isr_tasklet[hrrq_id]));
|
|
}
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
|
|
/**
|
|
* pmcraid_worker_function - worker thread function
|
|
*
|
|
* @workp: pointer to struct work queue
|
|
*
|
|
* Return Value
|
|
* None
|
|
*/
|
|
|
|
static void pmcraid_worker_function(struct work_struct *workp)
|
|
{
|
|
struct pmcraid_instance *pinstance;
|
|
struct pmcraid_resource_entry *res;
|
|
struct pmcraid_resource_entry *temp;
|
|
struct scsi_device *sdev;
|
|
unsigned long lock_flags;
|
|
unsigned long host_lock_flags;
|
|
u16 fw_version;
|
|
u8 bus, target, lun;
|
|
|
|
pinstance = container_of(workp, struct pmcraid_instance, worker_q);
|
|
/* add resources only after host is added into system */
|
|
if (!atomic_read(&pinstance->expose_resources))
|
|
return;
|
|
|
|
fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
|
|
|
|
spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
|
|
list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) {
|
|
|
|
if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) {
|
|
sdev = res->scsi_dev;
|
|
|
|
/* host_lock must be held before calling
|
|
* scsi_device_get
|
|
*/
|
|
spin_lock_irqsave(pinstance->host->host_lock,
|
|
host_lock_flags);
|
|
if (!scsi_device_get(sdev)) {
|
|
spin_unlock_irqrestore(
|
|
pinstance->host->host_lock,
|
|
host_lock_flags);
|
|
pmcraid_info("deleting %x from midlayer\n",
|
|
res->cfg_entry.resource_address);
|
|
list_move_tail(&res->queue,
|
|
&pinstance->free_res_q);
|
|
spin_unlock_irqrestore(
|
|
&pinstance->resource_lock,
|
|
lock_flags);
|
|
scsi_remove_device(sdev);
|
|
scsi_device_put(sdev);
|
|
spin_lock_irqsave(&pinstance->resource_lock,
|
|
lock_flags);
|
|
res->change_detected = 0;
|
|
} else {
|
|
spin_unlock_irqrestore(
|
|
pinstance->host->host_lock,
|
|
host_lock_flags);
|
|
}
|
|
}
|
|
}
|
|
|
|
list_for_each_entry(res, &pinstance->used_res_q, queue) {
|
|
|
|
if (res->change_detected == RES_CHANGE_ADD) {
|
|
|
|
if (!pmcraid_expose_resource(fw_version,
|
|
&res->cfg_entry))
|
|
continue;
|
|
|
|
if (RES_IS_VSET(res->cfg_entry)) {
|
|
bus = PMCRAID_VSET_BUS_ID;
|
|
if (fw_version <= PMCRAID_FW_VERSION_1)
|
|
target = res->cfg_entry.unique_flags1;
|
|
else
|
|
target = res->cfg_entry.array_id & 0xFF;
|
|
lun = PMCRAID_VSET_LUN_ID;
|
|
} else {
|
|
bus = PMCRAID_PHYS_BUS_ID;
|
|
target =
|
|
RES_TARGET(
|
|
res->cfg_entry.resource_address);
|
|
lun = RES_LUN(res->cfg_entry.resource_address);
|
|
}
|
|
|
|
res->change_detected = 0;
|
|
spin_unlock_irqrestore(&pinstance->resource_lock,
|
|
lock_flags);
|
|
scsi_add_device(pinstance->host, bus, target, lun);
|
|
spin_lock_irqsave(&pinstance->resource_lock,
|
|
lock_flags);
|
|
}
|
|
}
|
|
|
|
spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_tasklet_function - Tasklet function
|
|
*
|
|
* @instance: pointer to msix param structure
|
|
*
|
|
* Return Value
|
|
* None
|
|
*/
|
|
static void pmcraid_tasklet_function(unsigned long instance)
|
|
{
|
|
struct pmcraid_isr_param *hrrq_vector;
|
|
struct pmcraid_instance *pinstance;
|
|
unsigned long hrrq_lock_flags;
|
|
unsigned long pending_lock_flags;
|
|
unsigned long host_lock_flags;
|
|
spinlock_t *lockp; /* hrrq buffer lock */
|
|
int id;
|
|
__le32 resp;
|
|
|
|
hrrq_vector = (struct pmcraid_isr_param *)instance;
|
|
pinstance = hrrq_vector->drv_inst;
|
|
id = hrrq_vector->hrrq_id;
|
|
lockp = &(pinstance->hrrq_lock[id]);
|
|
|
|
/* loop through each of the commands responded by IOA. Each HRRQ buf is
|
|
* protected by its own lock. Traversals must be done within this lock
|
|
* as there may be multiple tasklets running on multiple CPUs. Note
|
|
* that the lock is held just for picking up the response handle and
|
|
* manipulating hrrq_curr/toggle_bit values.
|
|
*/
|
|
spin_lock_irqsave(lockp, hrrq_lock_flags);
|
|
|
|
resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
|
|
|
|
while ((resp & HRRQ_TOGGLE_BIT) ==
|
|
pinstance->host_toggle_bit[id]) {
|
|
|
|
int cmd_index = resp >> 2;
|
|
struct pmcraid_cmd *cmd = NULL;
|
|
|
|
if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) {
|
|
pinstance->hrrq_curr[id]++;
|
|
} else {
|
|
pinstance->hrrq_curr[id] = pinstance->hrrq_start[id];
|
|
pinstance->host_toggle_bit[id] ^= 1u;
|
|
}
|
|
|
|
if (cmd_index >= PMCRAID_MAX_CMD) {
|
|
/* In case of invalid response handle, log message */
|
|
pmcraid_err("Invalid response handle %d\n", cmd_index);
|
|
resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
|
|
continue;
|
|
}
|
|
|
|
cmd = pinstance->cmd_list[cmd_index];
|
|
spin_unlock_irqrestore(lockp, hrrq_lock_flags);
|
|
|
|
spin_lock_irqsave(&pinstance->pending_pool_lock,
|
|
pending_lock_flags);
|
|
list_del(&cmd->free_list);
|
|
spin_unlock_irqrestore(&pinstance->pending_pool_lock,
|
|
pending_lock_flags);
|
|
del_timer(&cmd->timer);
|
|
atomic_dec(&pinstance->outstanding_cmds);
|
|
|
|
if (cmd->cmd_done == pmcraid_ioa_reset) {
|
|
spin_lock_irqsave(pinstance->host->host_lock,
|
|
host_lock_flags);
|
|
cmd->cmd_done(cmd);
|
|
spin_unlock_irqrestore(pinstance->host->host_lock,
|
|
host_lock_flags);
|
|
} else if (cmd->cmd_done != NULL) {
|
|
cmd->cmd_done(cmd);
|
|
}
|
|
/* loop over until we are done with all responses */
|
|
spin_lock_irqsave(lockp, hrrq_lock_flags);
|
|
resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
|
|
}
|
|
|
|
spin_unlock_irqrestore(lockp, hrrq_lock_flags);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_unregister_interrupt_handler - de-register interrupts handlers
|
|
* @pinstance: pointer to adapter instance structure
|
|
*
|
|
* This routine un-registers registered interrupt handler and
|
|
* also frees irqs/vectors.
|
|
*
|
|
* Retun Value
|
|
* None
|
|
*/
|
|
static
|
|
void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < pinstance->num_hrrq; i++)
|
|
free_irq(pinstance->hrrq_vector[i].vector,
|
|
&(pinstance->hrrq_vector[i]));
|
|
|
|
if (pinstance->interrupt_mode) {
|
|
pci_disable_msix(pinstance->pdev);
|
|
pinstance->interrupt_mode = 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pmcraid_register_interrupt_handler - registers interrupt handler
|
|
* @pinstance: pointer to per-adapter instance structure
|
|
*
|
|
* Return Value
|
|
* 0 on success, non-zero error code otherwise.
|
|
*/
|
|
static int
|
|
pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance)
|
|
{
|
|
int rc;
|
|
struct pci_dev *pdev = pinstance->pdev;
|
|
|
|
if ((pmcraid_enable_msix) &&
|
|
(pci_find_capability(pdev, PCI_CAP_ID_MSIX))) {
|
|
int num_hrrq = PMCRAID_NUM_MSIX_VECTORS;
|
|
struct msix_entry entries[PMCRAID_NUM_MSIX_VECTORS];
|
|
int i;
|
|
for (i = 0; i < PMCRAID_NUM_MSIX_VECTORS; i++)
|
|
entries[i].entry = i;
|
|
|
|
rc = pci_enable_msix(pdev, entries, num_hrrq);
|
|
if (rc < 0)
|
|
goto pmcraid_isr_legacy;
|
|
|
|
/* Check how many MSIX vectors are allocated and register
|
|
* msi-x handlers for each of them giving appropriate buffer
|
|
*/
|
|
if (rc > 0) {
|
|
num_hrrq = rc;
|
|
if (pci_enable_msix(pdev, entries, num_hrrq))
|
|
goto pmcraid_isr_legacy;
|
|
}
|
|
|
|
for (i = 0; i < num_hrrq; i++) {
|
|
pinstance->hrrq_vector[i].hrrq_id = i;
|
|
pinstance->hrrq_vector[i].drv_inst = pinstance;
|
|
pinstance->hrrq_vector[i].vector = entries[i].vector;
|
|
rc = request_irq(pinstance->hrrq_vector[i].vector,
|
|
pmcraid_isr_msix, 0,
|
|
PMCRAID_DRIVER_NAME,
|
|
&(pinstance->hrrq_vector[i]));
|
|
|
|
if (rc) {
|
|
int j;
|
|
for (j = 0; j < i; j++)
|
|
free_irq(entries[j].vector,
|
|
&(pinstance->hrrq_vector[j]));
|
|
pci_disable_msix(pdev);
|
|
goto pmcraid_isr_legacy;
|
|
}
|
|
}
|
|
|
|
pinstance->num_hrrq = num_hrrq;
|
|
pinstance->interrupt_mode = 1;
|
|
iowrite32(DOORBELL_INTR_MODE_MSIX,
|
|
pinstance->int_regs.host_ioa_interrupt_reg);
|
|
ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
|
|
goto pmcraid_isr_out;
|
|
}
|
|
|
|
pmcraid_isr_legacy:
|
|
/* If MSI-X registration failed fallback to legacy mode, where
|
|
* only one hrrq entry will be used
|
|
*/
|
|
pinstance->hrrq_vector[0].hrrq_id = 0;
|
|
pinstance->hrrq_vector[0].drv_inst = pinstance;
|
|
pinstance->hrrq_vector[0].vector = pdev->irq;
|
|
pinstance->num_hrrq = 1;
|
|
rc = 0;
|
|
|
|
rc = request_irq(pdev->irq, pmcraid_isr, IRQF_SHARED,
|
|
PMCRAID_DRIVER_NAME, &pinstance->hrrq_vector[0]);
|
|
pmcraid_isr_out:
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_release_cmd_blocks - release buufers allocated for command blocks
|
|
* @pinstance: per adapter instance structure pointer
|
|
* @max_index: number of buffer blocks to release
|
|
*
|
|
* Return Value
|
|
* None
|
|
*/
|
|
static void
|
|
pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index)
|
|
{
|
|
int i;
|
|
for (i = 0; i < max_index; i++) {
|
|
kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]);
|
|
pinstance->cmd_list[i] = NULL;
|
|
}
|
|
kmem_cache_destroy(pinstance->cmd_cachep);
|
|
pinstance->cmd_cachep = NULL;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_release_control_blocks - releases buffers alloced for control blocks
|
|
* @pinstance: pointer to per adapter instance structure
|
|
* @max_index: number of buffers (from 0 onwards) to release
|
|
*
|
|
* This function assumes that the command blocks for which control blocks are
|
|
* linked are not released.
|
|
*
|
|
* Return Value
|
|
* None
|
|
*/
|
|
static void
|
|
pmcraid_release_control_blocks(
|
|
struct pmcraid_instance *pinstance,
|
|
int max_index
|
|
)
|
|
{
|
|
int i;
|
|
|
|
if (pinstance->control_pool == NULL)
|
|
return;
|
|
|
|
for (i = 0; i < max_index; i++) {
|
|
pci_pool_free(pinstance->control_pool,
|
|
pinstance->cmd_list[i]->ioa_cb,
|
|
pinstance->cmd_list[i]->ioa_cb_bus_addr);
|
|
pinstance->cmd_list[i]->ioa_cb = NULL;
|
|
pinstance->cmd_list[i]->ioa_cb_bus_addr = 0;
|
|
}
|
|
pci_pool_destroy(pinstance->control_pool);
|
|
pinstance->control_pool = NULL;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures
|
|
* @pinstance - pointer to per adapter instance structure
|
|
*
|
|
* Allocates memory for command blocks using kernel slab allocator.
|
|
*
|
|
* Return Value
|
|
* 0 in case of success; -ENOMEM in case of failure
|
|
*/
|
|
static int pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance)
|
|
{
|
|
int i;
|
|
|
|
sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d",
|
|
pinstance->host->unique_id);
|
|
|
|
|
|
pinstance->cmd_cachep = kmem_cache_create(
|
|
pinstance->cmd_pool_name,
|
|
sizeof(struct pmcraid_cmd), 0,
|
|
SLAB_HWCACHE_ALIGN, NULL);
|
|
if (!pinstance->cmd_cachep)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < PMCRAID_MAX_CMD; i++) {
|
|
pinstance->cmd_list[i] =
|
|
kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL);
|
|
if (!pinstance->cmd_list[i]) {
|
|
pmcraid_release_cmd_blocks(pinstance, i);
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_allocate_control_blocks - allocates memory control blocks
|
|
* @pinstance : pointer to per adapter instance structure
|
|
*
|
|
* This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs
|
|
* and IOASAs. This is called after command blocks are already allocated.
|
|
*
|
|
* Return Value
|
|
* 0 in case it can allocate all control blocks, otherwise -ENOMEM
|
|
*/
|
|
static int pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance)
|
|
{
|
|
int i;
|
|
|
|
sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d",
|
|
pinstance->host->unique_id);
|
|
|
|
pinstance->control_pool =
|
|
pci_pool_create(pinstance->ctl_pool_name,
|
|
pinstance->pdev,
|
|
sizeof(struct pmcraid_control_block),
|
|
PMCRAID_IOARCB_ALIGNMENT, 0);
|
|
|
|
if (!pinstance->control_pool)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < PMCRAID_MAX_CMD; i++) {
|
|
pinstance->cmd_list[i]->ioa_cb =
|
|
pci_pool_alloc(
|
|
pinstance->control_pool,
|
|
GFP_KERNEL,
|
|
&(pinstance->cmd_list[i]->ioa_cb_bus_addr));
|
|
|
|
if (!pinstance->cmd_list[i]->ioa_cb) {
|
|
pmcraid_release_control_blocks(pinstance, i);
|
|
return -ENOMEM;
|
|
}
|
|
memset(pinstance->cmd_list[i]->ioa_cb, 0,
|
|
sizeof(struct pmcraid_control_block));
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s)
|
|
* @pinstance: pointer to per adapter instance structure
|
|
* @maxindex: size of hrrq buffer pointer array
|
|
*
|
|
* Return Value
|
|
* None
|
|
*/
|
|
static void
|
|
pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex)
|
|
{
|
|
int i;
|
|
for (i = 0; i < maxindex; i++) {
|
|
|
|
pci_free_consistent(pinstance->pdev,
|
|
HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD,
|
|
pinstance->hrrq_start[i],
|
|
pinstance->hrrq_start_bus_addr[i]);
|
|
|
|
/* reset pointers and toggle bit to zeros */
|
|
pinstance->hrrq_start[i] = NULL;
|
|
pinstance->hrrq_start_bus_addr[i] = 0;
|
|
pinstance->host_toggle_bit[i] = 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers
|
|
* @pinstance: pointer to per adapter instance structure
|
|
*
|
|
* Return value
|
|
* 0 hrrq buffers are allocated, -ENOMEM otherwise.
|
|
*/
|
|
static int pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance)
|
|
{
|
|
int i, buffer_size;
|
|
|
|
buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
|
|
|
|
for (i = 0; i < pinstance->num_hrrq; i++) {
|
|
pinstance->hrrq_start[i] =
|
|
pci_alloc_consistent(
|
|
pinstance->pdev,
|
|
buffer_size,
|
|
&(pinstance->hrrq_start_bus_addr[i]));
|
|
|
|
if (pinstance->hrrq_start[i] == 0) {
|
|
pmcraid_err("pci_alloc failed for hrrq vector : %d\n",
|
|
i);
|
|
pmcraid_release_host_rrqs(pinstance, i);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
memset(pinstance->hrrq_start[i], 0, buffer_size);
|
|
pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
|
|
pinstance->hrrq_end[i] =
|
|
pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
|
|
pinstance->host_toggle_bit[i] = 1;
|
|
spin_lock_init(&pinstance->hrrq_lock[i]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_release_hcams - release HCAM buffers
|
|
*
|
|
* @pinstance: pointer to per adapter instance structure
|
|
*
|
|
* Return value
|
|
* none
|
|
*/
|
|
static void pmcraid_release_hcams(struct pmcraid_instance *pinstance)
|
|
{
|
|
if (pinstance->ccn.msg != NULL) {
|
|
pci_free_consistent(pinstance->pdev,
|
|
PMCRAID_AEN_HDR_SIZE +
|
|
sizeof(struct pmcraid_hcam_ccn_ext),
|
|
pinstance->ccn.msg,
|
|
pinstance->ccn.baddr);
|
|
|
|
pinstance->ccn.msg = NULL;
|
|
pinstance->ccn.hcam = NULL;
|
|
pinstance->ccn.baddr = 0;
|
|
}
|
|
|
|
if (pinstance->ldn.msg != NULL) {
|
|
pci_free_consistent(pinstance->pdev,
|
|
PMCRAID_AEN_HDR_SIZE +
|
|
sizeof(struct pmcraid_hcam_ldn),
|
|
pinstance->ldn.msg,
|
|
pinstance->ldn.baddr);
|
|
|
|
pinstance->ldn.msg = NULL;
|
|
pinstance->ldn.hcam = NULL;
|
|
pinstance->ldn.baddr = 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pmcraid_allocate_hcams - allocates HCAM buffers
|
|
* @pinstance : pointer to per adapter instance structure
|
|
*
|
|
* Return Value:
|
|
* 0 in case of successful allocation, non-zero otherwise
|
|
*/
|
|
static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance)
|
|
{
|
|
pinstance->ccn.msg = pci_alloc_consistent(
|
|
pinstance->pdev,
|
|
PMCRAID_AEN_HDR_SIZE +
|
|
sizeof(struct pmcraid_hcam_ccn_ext),
|
|
&(pinstance->ccn.baddr));
|
|
|
|
pinstance->ldn.msg = pci_alloc_consistent(
|
|
pinstance->pdev,
|
|
PMCRAID_AEN_HDR_SIZE +
|
|
sizeof(struct pmcraid_hcam_ldn),
|
|
&(pinstance->ldn.baddr));
|
|
|
|
if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) {
|
|
pmcraid_release_hcams(pinstance);
|
|
} else {
|
|
pinstance->ccn.hcam =
|
|
(void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE;
|
|
pinstance->ldn.hcam =
|
|
(void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE;
|
|
|
|
atomic_set(&pinstance->ccn.ignore, 0);
|
|
atomic_set(&pinstance->ldn.ignore, 0);
|
|
}
|
|
|
|
return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_release_config_buffers - release config.table buffers
|
|
* @pinstance: pointer to per adapter instance structure
|
|
*
|
|
* Return Value
|
|
* none
|
|
*/
|
|
static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance)
|
|
{
|
|
if (pinstance->cfg_table != NULL &&
|
|
pinstance->cfg_table_bus_addr != 0) {
|
|
pci_free_consistent(pinstance->pdev,
|
|
sizeof(struct pmcraid_config_table),
|
|
pinstance->cfg_table,
|
|
pinstance->cfg_table_bus_addr);
|
|
pinstance->cfg_table = NULL;
|
|
pinstance->cfg_table_bus_addr = 0;
|
|
}
|
|
|
|
if (pinstance->res_entries != NULL) {
|
|
int i;
|
|
|
|
for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
|
|
list_del(&pinstance->res_entries[i].queue);
|
|
kfree(pinstance->res_entries);
|
|
pinstance->res_entries = NULL;
|
|
}
|
|
|
|
pmcraid_release_hcams(pinstance);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_allocate_config_buffers - allocates DMAable memory for config table
|
|
* @pinstance : pointer to per adapter instance structure
|
|
*
|
|
* Return Value
|
|
* 0 for successful allocation, -ENOMEM for any failure
|
|
*/
|
|
static int pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance)
|
|
{
|
|
int i;
|
|
|
|
pinstance->res_entries =
|
|
kzalloc(sizeof(struct pmcraid_resource_entry) *
|
|
PMCRAID_MAX_RESOURCES, GFP_KERNEL);
|
|
|
|
if (NULL == pinstance->res_entries) {
|
|
pmcraid_err("failed to allocate memory for resource table\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
|
|
list_add_tail(&pinstance->res_entries[i].queue,
|
|
&pinstance->free_res_q);
|
|
|
|
pinstance->cfg_table =
|
|
pci_alloc_consistent(pinstance->pdev,
|
|
sizeof(struct pmcraid_config_table),
|
|
&pinstance->cfg_table_bus_addr);
|
|
|
|
if (NULL == pinstance->cfg_table) {
|
|
pmcraid_err("couldn't alloc DMA memory for config table\n");
|
|
pmcraid_release_config_buffers(pinstance);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (pmcraid_allocate_hcams(pinstance)) {
|
|
pmcraid_err("could not alloc DMA memory for HCAMS\n");
|
|
pmcraid_release_config_buffers(pinstance);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_init_tasklets - registers tasklets for response handling
|
|
*
|
|
* @pinstance: pointer adapter instance structure
|
|
*
|
|
* Return value
|
|
* none
|
|
*/
|
|
static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance)
|
|
{
|
|
int i;
|
|
for (i = 0; i < pinstance->num_hrrq; i++)
|
|
tasklet_init(&pinstance->isr_tasklet[i],
|
|
pmcraid_tasklet_function,
|
|
(unsigned long)&pinstance->hrrq_vector[i]);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_kill_tasklets - destroys tasklets registered for response handling
|
|
*
|
|
* @pinstance: pointer to adapter instance structure
|
|
*
|
|
* Return value
|
|
* none
|
|
*/
|
|
static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance)
|
|
{
|
|
int i;
|
|
for (i = 0; i < pinstance->num_hrrq; i++)
|
|
tasklet_kill(&pinstance->isr_tasklet[i]);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_release_buffers - release per-adapter buffers allocated
|
|
*
|
|
* @pinstance: pointer to adapter soft state
|
|
*
|
|
* Return Value
|
|
* none
|
|
*/
|
|
static void pmcraid_release_buffers(struct pmcraid_instance *pinstance)
|
|
{
|
|
pmcraid_release_config_buffers(pinstance);
|
|
pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD);
|
|
pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
|
|
pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
|
|
|
|
if (pinstance->inq_data != NULL) {
|
|
pci_free_consistent(pinstance->pdev,
|
|
sizeof(struct pmcraid_inquiry_data),
|
|
pinstance->inq_data,
|
|
pinstance->inq_data_baddr);
|
|
|
|
pinstance->inq_data = NULL;
|
|
pinstance->inq_data_baddr = 0;
|
|
}
|
|
|
|
if (pinstance->timestamp_data != NULL) {
|
|
pci_free_consistent(pinstance->pdev,
|
|
sizeof(struct pmcraid_timestamp_data),
|
|
pinstance->timestamp_data,
|
|
pinstance->timestamp_data_baddr);
|
|
|
|
pinstance->timestamp_data = NULL;
|
|
pinstance->timestamp_data_baddr = 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pmcraid_init_buffers - allocates memory and initializes various structures
|
|
* @pinstance: pointer to per adapter instance structure
|
|
*
|
|
* This routine pre-allocates memory based on the type of block as below:
|
|
* cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator,
|
|
* IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator
|
|
* config-table entries : DMAable memory using pci_alloc_consistent
|
|
* HostRRQs : DMAable memory, using pci_alloc_consistent
|
|
*
|
|
* Return Value
|
|
* 0 in case all of the blocks are allocated, -ENOMEM otherwise.
|
|
*/
|
|
static int pmcraid_init_buffers(struct pmcraid_instance *pinstance)
|
|
{
|
|
int i;
|
|
|
|
if (pmcraid_allocate_host_rrqs(pinstance)) {
|
|
pmcraid_err("couldn't allocate memory for %d host rrqs\n",
|
|
pinstance->num_hrrq);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (pmcraid_allocate_config_buffers(pinstance)) {
|
|
pmcraid_err("couldn't allocate memory for config buffers\n");
|
|
pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (pmcraid_allocate_cmd_blocks(pinstance)) {
|
|
pmcraid_err("couldn't allocate memory for cmd blocks\n");
|
|
pmcraid_release_config_buffers(pinstance);
|
|
pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (pmcraid_allocate_control_blocks(pinstance)) {
|
|
pmcraid_err("couldn't allocate memory control blocks\n");
|
|
pmcraid_release_config_buffers(pinstance);
|
|
pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
|
|
pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* allocate DMAable memory for page D0 INQUIRY buffer */
|
|
pinstance->inq_data = pci_alloc_consistent(
|
|
pinstance->pdev,
|
|
sizeof(struct pmcraid_inquiry_data),
|
|
&pinstance->inq_data_baddr);
|
|
|
|
if (pinstance->inq_data == NULL) {
|
|
pmcraid_err("couldn't allocate DMA memory for INQUIRY\n");
|
|
pmcraid_release_buffers(pinstance);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* allocate DMAable memory for set timestamp data buffer */
|
|
pinstance->timestamp_data = pci_alloc_consistent(
|
|
pinstance->pdev,
|
|
sizeof(struct pmcraid_timestamp_data),
|
|
&pinstance->timestamp_data_baddr);
|
|
|
|
if (pinstance->timestamp_data == NULL) {
|
|
pmcraid_err("couldn't allocate DMA memory for \
|
|
set time_stamp \n");
|
|
pmcraid_release_buffers(pinstance);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
|
|
/* Initialize all the command blocks and add them to free pool. No
|
|
* need to lock (free_pool_lock) as this is done in initialization
|
|
* itself
|
|
*/
|
|
for (i = 0; i < PMCRAID_MAX_CMD; i++) {
|
|
struct pmcraid_cmd *cmdp = pinstance->cmd_list[i];
|
|
pmcraid_init_cmdblk(cmdp, i);
|
|
cmdp->drv_inst = pinstance;
|
|
list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_reinit_buffers - resets various buffer pointers
|
|
* @pinstance: pointer to adapter instance
|
|
* Return value
|
|
* none
|
|
*/
|
|
static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance)
|
|
{
|
|
int i;
|
|
int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
|
|
|
|
for (i = 0; i < pinstance->num_hrrq; i++) {
|
|
memset(pinstance->hrrq_start[i], 0, buffer_size);
|
|
pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
|
|
pinstance->hrrq_end[i] =
|
|
pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
|
|
pinstance->host_toggle_bit[i] = 1;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pmcraid_init_instance - initialize per instance data structure
|
|
* @pdev: pointer to pci device structure
|
|
* @host: pointer to Scsi_Host structure
|
|
* @mapped_pci_addr: memory mapped IOA configuration registers
|
|
*
|
|
* Return Value
|
|
* 0 on success, non-zero in case of any failure
|
|
*/
|
|
static int pmcraid_init_instance(struct pci_dev *pdev, struct Scsi_Host *host,
|
|
void __iomem *mapped_pci_addr)
|
|
{
|
|
struct pmcraid_instance *pinstance =
|
|
(struct pmcraid_instance *)host->hostdata;
|
|
|
|
pinstance->host = host;
|
|
pinstance->pdev = pdev;
|
|
|
|
/* Initialize register addresses */
|
|
pinstance->mapped_dma_addr = mapped_pci_addr;
|
|
|
|
/* Initialize chip-specific details */
|
|
{
|
|
struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg;
|
|
struct pmcraid_interrupts *pint_regs = &pinstance->int_regs;
|
|
|
|
pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin;
|
|
|
|
pint_regs->ioa_host_interrupt_reg =
|
|
mapped_pci_addr + chip_cfg->ioa_host_intr;
|
|
pint_regs->ioa_host_interrupt_clr_reg =
|
|
mapped_pci_addr + chip_cfg->ioa_host_intr_clr;
|
|
pint_regs->ioa_host_msix_interrupt_reg =
|
|
mapped_pci_addr + chip_cfg->ioa_host_msix_intr;
|
|
pint_regs->host_ioa_interrupt_reg =
|
|
mapped_pci_addr + chip_cfg->host_ioa_intr;
|
|
pint_regs->host_ioa_interrupt_clr_reg =
|
|
mapped_pci_addr + chip_cfg->host_ioa_intr_clr;
|
|
|
|
/* Current version of firmware exposes interrupt mask set
|
|
* and mask clr registers through memory mapped bar0.
|
|
*/
|
|
pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox;
|
|
pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus;
|
|
pint_regs->ioa_host_interrupt_mask_reg =
|
|
mapped_pci_addr + chip_cfg->ioa_host_mask;
|
|
pint_regs->ioa_host_interrupt_mask_clr_reg =
|
|
mapped_pci_addr + chip_cfg->ioa_host_mask_clr;
|
|
pint_regs->global_interrupt_mask_reg =
|
|
mapped_pci_addr + chip_cfg->global_intr_mask;
|
|
};
|
|
|
|
pinstance->ioa_reset_attempts = 0;
|
|
init_waitqueue_head(&pinstance->reset_wait_q);
|
|
|
|
atomic_set(&pinstance->outstanding_cmds, 0);
|
|
atomic_set(&pinstance->last_message_id, 0);
|
|
atomic_set(&pinstance->expose_resources, 0);
|
|
|
|
INIT_LIST_HEAD(&pinstance->free_res_q);
|
|
INIT_LIST_HEAD(&pinstance->used_res_q);
|
|
INIT_LIST_HEAD(&pinstance->free_cmd_pool);
|
|
INIT_LIST_HEAD(&pinstance->pending_cmd_pool);
|
|
|
|
spin_lock_init(&pinstance->free_pool_lock);
|
|
spin_lock_init(&pinstance->pending_pool_lock);
|
|
spin_lock_init(&pinstance->resource_lock);
|
|
mutex_init(&pinstance->aen_queue_lock);
|
|
|
|
/* Work-queue (Shared) for deferred processing error handling */
|
|
INIT_WORK(&pinstance->worker_q, pmcraid_worker_function);
|
|
|
|
/* Initialize the default log_level */
|
|
pinstance->current_log_level = pmcraid_log_level;
|
|
|
|
/* Setup variables required for reset engine */
|
|
pinstance->ioa_state = IOA_STATE_UNKNOWN;
|
|
pinstance->reset_cmd = NULL;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_shutdown - shutdown adapter controller.
|
|
* @pdev: pci device struct
|
|
*
|
|
* Issues an adapter shutdown to the card waits for its completion
|
|
*
|
|
* Return value
|
|
* none
|
|
*/
|
|
static void pmcraid_shutdown(struct pci_dev *pdev)
|
|
{
|
|
struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
|
|
pmcraid_reset_bringdown(pinstance);
|
|
}
|
|
|
|
|
|
/**
|
|
* pmcraid_get_minor - returns unused minor number from minor number bitmap
|
|
*/
|
|
static unsigned short pmcraid_get_minor(void)
|
|
{
|
|
int minor;
|
|
|
|
minor = find_first_zero_bit(pmcraid_minor, sizeof(pmcraid_minor));
|
|
__set_bit(minor, pmcraid_minor);
|
|
return minor;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_release_minor - releases given minor back to minor number bitmap
|
|
*/
|
|
static void pmcraid_release_minor(unsigned short minor)
|
|
{
|
|
__clear_bit(minor, pmcraid_minor);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_setup_chrdev - allocates a minor number and registers a char device
|
|
*
|
|
* @pinstance: pointer to adapter instance for which to register device
|
|
*
|
|
* Return value
|
|
* 0 in case of success, otherwise non-zero
|
|
*/
|
|
static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance)
|
|
{
|
|
int minor;
|
|
int error;
|
|
|
|
minor = pmcraid_get_minor();
|
|
cdev_init(&pinstance->cdev, &pmcraid_fops);
|
|
pinstance->cdev.owner = THIS_MODULE;
|
|
|
|
error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1);
|
|
|
|
if (error)
|
|
pmcraid_release_minor(minor);
|
|
else
|
|
device_create(pmcraid_class, NULL, MKDEV(pmcraid_major, minor),
|
|
NULL, "%s%u", PMCRAID_DEVFILE, minor);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_release_chrdev - unregisters per-adapter management interface
|
|
*
|
|
* @pinstance: pointer to adapter instance structure
|
|
*
|
|
* Return value
|
|
* none
|
|
*/
|
|
static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance)
|
|
{
|
|
pmcraid_release_minor(MINOR(pinstance->cdev.dev));
|
|
device_destroy(pmcraid_class,
|
|
MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev)));
|
|
cdev_del(&pinstance->cdev);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_remove - IOA hot plug remove entry point
|
|
* @pdev: pci device struct
|
|
*
|
|
* Return value
|
|
* none
|
|
*/
|
|
static void pmcraid_remove(struct pci_dev *pdev)
|
|
{
|
|
struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
|
|
|
|
/* remove the management interface (/dev file) for this device */
|
|
pmcraid_release_chrdev(pinstance);
|
|
|
|
/* remove host template from scsi midlayer */
|
|
scsi_remove_host(pinstance->host);
|
|
|
|
/* block requests from mid-layer */
|
|
scsi_block_requests(pinstance->host);
|
|
|
|
/* initiate shutdown adapter */
|
|
pmcraid_shutdown(pdev);
|
|
|
|
pmcraid_disable_interrupts(pinstance, ~0);
|
|
flush_work(&pinstance->worker_q);
|
|
|
|
pmcraid_kill_tasklets(pinstance);
|
|
pmcraid_unregister_interrupt_handler(pinstance);
|
|
pmcraid_release_buffers(pinstance);
|
|
iounmap(pinstance->mapped_dma_addr);
|
|
pci_release_regions(pdev);
|
|
scsi_host_put(pinstance->host);
|
|
pci_disable_device(pdev);
|
|
|
|
return;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
/**
|
|
* pmcraid_suspend - driver suspend entry point for power management
|
|
* @pdev: PCI device structure
|
|
* @state: PCI power state to suspend routine
|
|
*
|
|
* Return Value - 0 always
|
|
*/
|
|
static int pmcraid_suspend(struct pci_dev *pdev, pm_message_t state)
|
|
{
|
|
struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
|
|
|
|
pmcraid_shutdown(pdev);
|
|
pmcraid_disable_interrupts(pinstance, ~0);
|
|
pmcraid_kill_tasklets(pinstance);
|
|
pci_set_drvdata(pinstance->pdev, pinstance);
|
|
pmcraid_unregister_interrupt_handler(pinstance);
|
|
pci_save_state(pdev);
|
|
pci_disable_device(pdev);
|
|
pci_set_power_state(pdev, pci_choose_state(pdev, state));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_resume - driver resume entry point PCI power management
|
|
* @pdev: PCI device structure
|
|
*
|
|
* Return Value - 0 in case of success. Error code in case of any failure
|
|
*/
|
|
static int pmcraid_resume(struct pci_dev *pdev)
|
|
{
|
|
struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
|
|
struct Scsi_Host *host = pinstance->host;
|
|
int rc;
|
|
|
|
pci_set_power_state(pdev, PCI_D0);
|
|
pci_enable_wake(pdev, PCI_D0, 0);
|
|
pci_restore_state(pdev);
|
|
|
|
rc = pci_enable_device(pdev);
|
|
|
|
if (rc) {
|
|
dev_err(&pdev->dev, "resume: Enable device failed\n");
|
|
return rc;
|
|
}
|
|
|
|
pci_set_master(pdev);
|
|
|
|
if ((sizeof(dma_addr_t) == 4) ||
|
|
pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
|
|
rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
|
|
|
|
if (rc == 0)
|
|
rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
|
|
|
|
if (rc != 0) {
|
|
dev_err(&pdev->dev, "resume: Failed to set PCI DMA mask\n");
|
|
goto disable_device;
|
|
}
|
|
|
|
pmcraid_disable_interrupts(pinstance, ~0);
|
|
atomic_set(&pinstance->outstanding_cmds, 0);
|
|
rc = pmcraid_register_interrupt_handler(pinstance);
|
|
|
|
if (rc) {
|
|
dev_err(&pdev->dev,
|
|
"resume: couldn't register interrupt handlers\n");
|
|
rc = -ENODEV;
|
|
goto release_host;
|
|
}
|
|
|
|
pmcraid_init_tasklets(pinstance);
|
|
pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
|
|
|
|
/* Start with hard reset sequence which brings up IOA to operational
|
|
* state as well as completes the reset sequence.
|
|
*/
|
|
pinstance->ioa_hard_reset = 1;
|
|
|
|
/* Start IOA firmware initialization and bring card to Operational
|
|
* state.
|
|
*/
|
|
if (pmcraid_reset_bringup(pinstance)) {
|
|
dev_err(&pdev->dev, "couldn't initialize IOA\n");
|
|
rc = -ENODEV;
|
|
goto release_tasklets;
|
|
}
|
|
|
|
return 0;
|
|
|
|
release_tasklets:
|
|
pmcraid_disable_interrupts(pinstance, ~0);
|
|
pmcraid_kill_tasklets(pinstance);
|
|
pmcraid_unregister_interrupt_handler(pinstance);
|
|
|
|
release_host:
|
|
scsi_host_put(host);
|
|
|
|
disable_device:
|
|
pci_disable_device(pdev);
|
|
|
|
return rc;
|
|
}
|
|
|
|
#else
|
|
|
|
#define pmcraid_suspend NULL
|
|
#define pmcraid_resume NULL
|
|
|
|
#endif /* CONFIG_PM */
|
|
|
|
/**
|
|
* pmcraid_complete_ioa_reset - Called by either timer or tasklet during
|
|
* completion of the ioa reset
|
|
* @cmd: pointer to reset command block
|
|
*/
|
|
static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(pinstance->host->host_lock, flags);
|
|
pmcraid_ioa_reset(cmd);
|
|
spin_unlock_irqrestore(pinstance->host->host_lock, flags);
|
|
scsi_unblock_requests(pinstance->host);
|
|
schedule_work(&pinstance->worker_q);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP
|
|
*
|
|
* @cmd: pointer to pmcraid_cmd structure
|
|
*
|
|
* Return Value
|
|
* 0 for success or non-zero for failure cases
|
|
*/
|
|
static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
|
void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset;
|
|
|
|
pmcraid_reinit_cmdblk(cmd);
|
|
|
|
ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
|
|
ioarcb->request_type = REQ_TYPE_IOACMD;
|
|
ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES;
|
|
ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED;
|
|
|
|
/* If this was called as part of resource table reinitialization due to
|
|
* lost CCN, it is enough to return the command block back to free pool
|
|
* as part of set_supported_devs completion function.
|
|
*/
|
|
if (cmd->drv_inst->reinit_cfg_table) {
|
|
cmd->drv_inst->reinit_cfg_table = 0;
|
|
cmd->release = 1;
|
|
cmd_done = pmcraid_reinit_cfgtable_done;
|
|
}
|
|
|
|
/* we will be done with the reset sequence after set supported devices,
|
|
* setup the done function to return the command block back to free
|
|
* pool
|
|
*/
|
|
pmcraid_send_cmd(cmd,
|
|
cmd_done,
|
|
PMCRAID_SET_SUP_DEV_TIMEOUT,
|
|
pmcraid_timeout_handler);
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_set_timestamp - set the timestamp to IOAFP
|
|
*
|
|
* @cmd: pointer to pmcraid_cmd structure
|
|
*
|
|
* Return Value
|
|
* 0 for success or non-zero for failure cases
|
|
*/
|
|
static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
|
__be32 time_stamp_len = cpu_to_be32(PMCRAID_TIMESTAMP_LEN);
|
|
struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
|
|
|
|
struct timeval tv;
|
|
__le64 timestamp;
|
|
|
|
do_gettimeofday(&tv);
|
|
timestamp = tv.tv_sec * 1000;
|
|
|
|
pinstance->timestamp_data->timestamp[0] = (__u8)(timestamp);
|
|
pinstance->timestamp_data->timestamp[1] = (__u8)((timestamp) >> 8);
|
|
pinstance->timestamp_data->timestamp[2] = (__u8)((timestamp) >> 16);
|
|
pinstance->timestamp_data->timestamp[3] = (__u8)((timestamp) >> 24);
|
|
pinstance->timestamp_data->timestamp[4] = (__u8)((timestamp) >> 32);
|
|
pinstance->timestamp_data->timestamp[5] = (__u8)((timestamp) >> 40);
|
|
|
|
pmcraid_reinit_cmdblk(cmd);
|
|
ioarcb->request_type = REQ_TYPE_SCSI;
|
|
ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
|
|
ioarcb->cdb[0] = PMCRAID_SCSI_SET_TIMESTAMP;
|
|
ioarcb->cdb[1] = PMCRAID_SCSI_SERVICE_ACTION;
|
|
memcpy(&(ioarcb->cdb[6]), &time_stamp_len, sizeof(time_stamp_len));
|
|
|
|
ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
|
|
offsetof(struct pmcraid_ioarcb,
|
|
add_data.u.ioadl[0]));
|
|
ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
|
|
ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
|
|
|
|
ioarcb->request_flags0 |= NO_LINK_DESCS;
|
|
ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
|
|
ioarcb->data_transfer_length =
|
|
cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
|
|
ioadl = &(ioarcb->add_data.u.ioadl[0]);
|
|
ioadl->flags = IOADL_FLAGS_LAST_DESC;
|
|
ioadl->address = cpu_to_le64(pinstance->timestamp_data_baddr);
|
|
ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
|
|
|
|
if (!pinstance->timestamp_error) {
|
|
pinstance->timestamp_error = 0;
|
|
pmcraid_send_cmd(cmd, pmcraid_set_supported_devs,
|
|
PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
|
|
} else {
|
|
pmcraid_send_cmd(cmd, pmcraid_return_cmd,
|
|
PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
|
|
return;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* pmcraid_init_res_table - Initialize the resource table
|
|
* @cmd: pointer to pmcraid command struct
|
|
*
|
|
* This function looks through the existing resource table, comparing
|
|
* it with the config table. This function will take care of old/new
|
|
* devices and schedule adding/removing them from the mid-layer
|
|
* as appropriate.
|
|
*
|
|
* Return value
|
|
* None
|
|
*/
|
|
static void pmcraid_init_res_table(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
struct pmcraid_resource_entry *res, *temp;
|
|
struct pmcraid_config_table_entry *cfgte;
|
|
unsigned long lock_flags;
|
|
int found, rc, i;
|
|
u16 fw_version;
|
|
LIST_HEAD(old_res);
|
|
|
|
if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED)
|
|
pmcraid_err("IOA requires microcode download\n");
|
|
|
|
fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
|
|
|
|
/* resource list is protected by pinstance->resource_lock.
|
|
* init_res_table can be called from probe (user-thread) or runtime
|
|
* reset (timer/tasklet)
|
|
*/
|
|
spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
|
|
|
|
list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue)
|
|
list_move_tail(&res->queue, &old_res);
|
|
|
|
for (i = 0; i < pinstance->cfg_table->num_entries; i++) {
|
|
if (be16_to_cpu(pinstance->inq_data->fw_version) <=
|
|
PMCRAID_FW_VERSION_1)
|
|
cfgte = &pinstance->cfg_table->entries[i];
|
|
else
|
|
cfgte = (struct pmcraid_config_table_entry *)
|
|
&pinstance->cfg_table->entries_ext[i];
|
|
|
|
if (!pmcraid_expose_resource(fw_version, cfgte))
|
|
continue;
|
|
|
|
found = 0;
|
|
|
|
/* If this entry was already detected and initialized */
|
|
list_for_each_entry_safe(res, temp, &old_res, queue) {
|
|
|
|
rc = memcmp(&res->cfg_entry.resource_address,
|
|
&cfgte->resource_address,
|
|
sizeof(cfgte->resource_address));
|
|
if (!rc) {
|
|
list_move_tail(&res->queue,
|
|
&pinstance->used_res_q);
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* If this is new entry, initialize it and add it the queue */
|
|
if (!found) {
|
|
|
|
if (list_empty(&pinstance->free_res_q)) {
|
|
pmcraid_err("Too many devices attached\n");
|
|
break;
|
|
}
|
|
|
|
found = 1;
|
|
res = list_entry(pinstance->free_res_q.next,
|
|
struct pmcraid_resource_entry, queue);
|
|
|
|
res->scsi_dev = NULL;
|
|
res->change_detected = RES_CHANGE_ADD;
|
|
res->reset_progress = 0;
|
|
list_move_tail(&res->queue, &pinstance->used_res_q);
|
|
}
|
|
|
|
/* copy new configuration table entry details into driver
|
|
* maintained resource entry
|
|
*/
|
|
if (found) {
|
|
memcpy(&res->cfg_entry, cfgte,
|
|
pinstance->config_table_entry_size);
|
|
pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
|
|
res->cfg_entry.resource_type,
|
|
(fw_version <= PMCRAID_FW_VERSION_1 ?
|
|
res->cfg_entry.unique_flags1 :
|
|
res->cfg_entry.array_id & 0xFF),
|
|
le32_to_cpu(res->cfg_entry.resource_address));
|
|
}
|
|
}
|
|
|
|
/* Detect any deleted entries, mark them for deletion from mid-layer */
|
|
list_for_each_entry_safe(res, temp, &old_res, queue) {
|
|
|
|
if (res->scsi_dev) {
|
|
res->change_detected = RES_CHANGE_DEL;
|
|
res->cfg_entry.resource_handle =
|
|
PMCRAID_INVALID_RES_HANDLE;
|
|
list_move_tail(&res->queue, &pinstance->used_res_q);
|
|
} else {
|
|
list_move_tail(&res->queue, &pinstance->free_res_q);
|
|
}
|
|
}
|
|
|
|
/* release the resource list lock */
|
|
spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
|
|
pmcraid_set_timestamp(cmd);
|
|
}
|
|
|
|
/**
|
|
* pmcraid_querycfg - Send a Query IOA Config to the adapter.
|
|
* @cmd: pointer pmcraid_cmd struct
|
|
*
|
|
* This function sends a Query IOA Configuration command to the adapter to
|
|
* retrieve the IOA configuration table.
|
|
*
|
|
* Return value:
|
|
* none
|
|
*/
|
|
static void pmcraid_querycfg(struct pmcraid_cmd *cmd)
|
|
{
|
|
struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
|
struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
|
|
struct pmcraid_instance *pinstance = cmd->drv_inst;
|
|
int cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table));
|
|
|
|
if (be16_to_cpu(pinstance->inq_data->fw_version) <=
|
|
PMCRAID_FW_VERSION_1)
|
|
pinstance->config_table_entry_size =
|
|
sizeof(struct pmcraid_config_table_entry);
|
|
else
|
|
pinstance->config_table_entry_size =
|
|
sizeof(struct pmcraid_config_table_entry_ext);
|
|
|
|
ioarcb->request_type = REQ_TYPE_IOACMD;
|
|
ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
|
|
|
|
ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG;
|
|
|
|
/* firmware requires 4-byte length field, specified in B.E format */
|
|
memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size));
|
|
|
|
/* Since entire config table can be described by single IOADL, it can
|
|
* be part of IOARCB itself
|
|
*/
|
|
ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
|
|
offsetof(struct pmcraid_ioarcb,
|
|
add_data.u.ioadl[0]));
|
|
ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
|
|
ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
|
|
|
|
ioarcb->request_flags0 |= NO_LINK_DESCS;
|
|
ioarcb->data_transfer_length =
|
|
cpu_to_le32(sizeof(struct pmcraid_config_table));
|
|
|
|
ioadl = &(ioarcb->add_data.u.ioadl[0]);
|
|
ioadl->flags = IOADL_FLAGS_LAST_DESC;
|
|
ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr);
|
|
ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table));
|
|
|
|
pmcraid_send_cmd(cmd, pmcraid_init_res_table,
|
|
PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
|
|
}
|
|
|
|
|
|
/**
|
|
* pmcraid_probe - PCI probe entry pointer for PMC MaxRAID controller driver
|
|
* @pdev: pointer to pci device structure
|
|
* @dev_id: pointer to device ids structure
|
|
*
|
|
* Return Value
|
|
* returns 0 if the device is claimed and successfully configured.
|
|
* returns non-zero error code in case of any failure
|
|
*/
|
|
static int pmcraid_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *dev_id)
|
|
{
|
|
struct pmcraid_instance *pinstance;
|
|
struct Scsi_Host *host;
|
|
void __iomem *mapped_pci_addr;
|
|
int rc = PCIBIOS_SUCCESSFUL;
|
|
|
|
if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) {
|
|
pmcraid_err
|
|
("maximum number(%d) of supported adapters reached\n",
|
|
atomic_read(&pmcraid_adapter_count));
|
|
return -ENOMEM;
|
|
}
|
|
|
|
atomic_inc(&pmcraid_adapter_count);
|
|
rc = pci_enable_device(pdev);
|
|
|
|
if (rc) {
|
|
dev_err(&pdev->dev, "Cannot enable adapter\n");
|
|
atomic_dec(&pmcraid_adapter_count);
|
|
return rc;
|
|
}
|
|
|
|
dev_info(&pdev->dev,
|
|
"Found new IOA(%x:%x), Total IOA count: %d\n",
|
|
pdev->vendor, pdev->device,
|
|
atomic_read(&pmcraid_adapter_count));
|
|
|
|
rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME);
|
|
|
|
if (rc < 0) {
|
|
dev_err(&pdev->dev,
|
|
"Couldn't register memory range of registers\n");
|
|
goto out_disable_device;
|
|
}
|
|
|
|
mapped_pci_addr = pci_iomap(pdev, 0, 0);
|
|
|
|
if (!mapped_pci_addr) {
|
|
dev_err(&pdev->dev, "Couldn't map PCI registers memory\n");
|
|
rc = -ENOMEM;
|
|
goto out_release_regions;
|
|
}
|
|
|
|
pci_set_master(pdev);
|
|
|
|
/* Firmware requires the system bus address of IOARCB to be within
|
|
* 32-bit addressable range though it has 64-bit IOARRIN register.
|
|
* However, firmware supports 64-bit streaming DMA buffers, whereas
|
|
* coherent buffers are to be 32-bit. Since pci_alloc_consistent always
|
|
* returns memory within 4GB (if not, change this logic), coherent
|
|
* buffers are within firmware acceptable address ranges.
|
|
*/
|
|
if ((sizeof(dma_addr_t) == 4) ||
|
|
pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
|
|
rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
|
|
|
|
/* firmware expects 32-bit DMA addresses for IOARRIN register; set 32
|
|
* bit mask for pci_alloc_consistent to return addresses within 4GB
|
|
*/
|
|
if (rc == 0)
|
|
rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
|
|
|
|
if (rc != 0) {
|
|
dev_err(&pdev->dev, "Failed to set PCI DMA mask\n");
|
|
goto cleanup_nomem;
|
|
}
|
|
|
|
host = scsi_host_alloc(&pmcraid_host_template,
|
|
sizeof(struct pmcraid_instance));
|
|
|
|
if (!host) {
|
|
dev_err(&pdev->dev, "scsi_host_alloc failed!\n");
|
|
rc = -ENOMEM;
|
|
goto cleanup_nomem;
|
|
}
|
|
|
|
host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS;
|
|
host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET;
|
|
host->unique_id = host->host_no;
|
|
host->max_channel = PMCRAID_MAX_BUS_TO_SCAN;
|
|
host->max_cmd_len = PMCRAID_MAX_CDB_LEN;
|
|
|
|
/* zero out entire instance structure */
|
|
pinstance = (struct pmcraid_instance *)host->hostdata;
|
|
memset(pinstance, 0, sizeof(*pinstance));
|
|
|
|
pinstance->chip_cfg =
|
|
(struct pmcraid_chip_details *)(dev_id->driver_data);
|
|
|
|
rc = pmcraid_init_instance(pdev, host, mapped_pci_addr);
|
|
|
|
if (rc < 0) {
|
|
dev_err(&pdev->dev, "failed to initialize adapter instance\n");
|
|
goto out_scsi_host_put;
|
|
}
|
|
|
|
pci_set_drvdata(pdev, pinstance);
|
|
|
|
/* Save PCI config-space for use following the reset */
|
|
rc = pci_save_state(pinstance->pdev);
|
|
|
|
if (rc != 0) {
|
|
dev_err(&pdev->dev, "Failed to save PCI config space\n");
|
|
goto out_scsi_host_put;
|
|
}
|
|
|
|
pmcraid_disable_interrupts(pinstance, ~0);
|
|
|
|
rc = pmcraid_register_interrupt_handler(pinstance);
|
|
|
|
if (rc) {
|
|
dev_err(&pdev->dev, "couldn't register interrupt handler\n");
|
|
goto out_scsi_host_put;
|
|
}
|
|
|
|
pmcraid_init_tasklets(pinstance);
|
|
|
|
/* allocate verious buffers used by LLD.*/
|
|
rc = pmcraid_init_buffers(pinstance);
|
|
|
|
if (rc) {
|
|
pmcraid_err("couldn't allocate memory blocks\n");
|
|
goto out_unregister_isr;
|
|
}
|
|
|
|
/* check the reset type required */
|
|
pmcraid_reset_type(pinstance);
|
|
|
|
pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
|
|
|
|
/* Start IOA firmware initialization and bring card to Operational
|
|
* state.
|
|
*/
|
|
pmcraid_info("starting IOA initialization sequence\n");
|
|
if (pmcraid_reset_bringup(pinstance)) {
|
|
dev_err(&pdev->dev, "couldn't initialize IOA\n");
|
|
rc = 1;
|
|
goto out_release_bufs;
|
|
}
|
|
|
|
/* Add adapter instance into mid-layer list */
|
|
rc = scsi_add_host(pinstance->host, &pdev->dev);
|
|
if (rc != 0) {
|
|
pmcraid_err("couldn't add host into mid-layer: %d\n", rc);
|
|
goto out_release_bufs;
|
|
}
|
|
|
|
scsi_scan_host(pinstance->host);
|
|
|
|
rc = pmcraid_setup_chrdev(pinstance);
|
|
|
|
if (rc != 0) {
|
|
pmcraid_err("couldn't create mgmt interface, error: %x\n",
|
|
rc);
|
|
goto out_remove_host;
|
|
}
|
|
|
|
/* Schedule worker thread to handle CCN and take care of adding and
|
|
* removing devices to OS
|
|
*/
|
|
atomic_set(&pinstance->expose_resources, 1);
|
|
schedule_work(&pinstance->worker_q);
|
|
return rc;
|
|
|
|
out_remove_host:
|
|
scsi_remove_host(host);
|
|
|
|
out_release_bufs:
|
|
pmcraid_release_buffers(pinstance);
|
|
|
|
out_unregister_isr:
|
|
pmcraid_kill_tasklets(pinstance);
|
|
pmcraid_unregister_interrupt_handler(pinstance);
|
|
|
|
out_scsi_host_put:
|
|
scsi_host_put(host);
|
|
|
|
cleanup_nomem:
|
|
iounmap(mapped_pci_addr);
|
|
|
|
out_release_regions:
|
|
pci_release_regions(pdev);
|
|
|
|
out_disable_device:
|
|
atomic_dec(&pmcraid_adapter_count);
|
|
pci_set_drvdata(pdev, NULL);
|
|
pci_disable_device(pdev);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* PCI driver structure of pcmraid driver
|
|
*/
|
|
static struct pci_driver pmcraid_driver = {
|
|
.name = PMCRAID_DRIVER_NAME,
|
|
.id_table = pmcraid_pci_table,
|
|
.probe = pmcraid_probe,
|
|
.remove = pmcraid_remove,
|
|
.suspend = pmcraid_suspend,
|
|
.resume = pmcraid_resume,
|
|
.shutdown = pmcraid_shutdown
|
|
};
|
|
|
|
/**
|
|
* pmcraid_init - module load entry point
|
|
*/
|
|
static int __init pmcraid_init(void)
|
|
{
|
|
dev_t dev;
|
|
int error;
|
|
|
|
pmcraid_info("%s Device Driver version: %s\n",
|
|
PMCRAID_DRIVER_NAME, PMCRAID_DRIVER_VERSION);
|
|
|
|
error = alloc_chrdev_region(&dev, 0,
|
|
PMCRAID_MAX_ADAPTERS,
|
|
PMCRAID_DEVFILE);
|
|
|
|
if (error) {
|
|
pmcraid_err("failed to get a major number for adapters\n");
|
|
goto out_init;
|
|
}
|
|
|
|
pmcraid_major = MAJOR(dev);
|
|
pmcraid_class = class_create(THIS_MODULE, PMCRAID_DEVFILE);
|
|
|
|
if (IS_ERR(pmcraid_class)) {
|
|
error = PTR_ERR(pmcraid_class);
|
|
pmcraid_err("failed to register with with sysfs, error = %x\n",
|
|
error);
|
|
goto out_unreg_chrdev;
|
|
}
|
|
|
|
error = pmcraid_netlink_init();
|
|
|
|
if (error)
|
|
goto out_unreg_chrdev;
|
|
|
|
error = pci_register_driver(&pmcraid_driver);
|
|
|
|
if (error == 0)
|
|
goto out_init;
|
|
|
|
pmcraid_err("failed to register pmcraid driver, error = %x\n",
|
|
error);
|
|
class_destroy(pmcraid_class);
|
|
pmcraid_netlink_release();
|
|
|
|
out_unreg_chrdev:
|
|
unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS);
|
|
|
|
out_init:
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* pmcraid_exit - module unload entry point
|
|
*/
|
|
static void __exit pmcraid_exit(void)
|
|
{
|
|
pmcraid_netlink_release();
|
|
unregister_chrdev_region(MKDEV(pmcraid_major, 0),
|
|
PMCRAID_MAX_ADAPTERS);
|
|
pci_unregister_driver(&pmcraid_driver);
|
|
class_destroy(pmcraid_class);
|
|
}
|
|
|
|
module_init(pmcraid_init);
|
|
module_exit(pmcraid_exit);
|