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kernel-fxtec-pro1x/drivers/scsi/qlogicisp.c

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
/*
* QLogic ISP1020 Intelligent SCSI Processor Driver (PCI)
* Written by Erik H. Moe, ehm@cris.com
* Copyright 1995, Erik H. Moe
* Copyright 1996, 1997 Michael A. Griffith <grif@acm.org>
* Copyright 2000, Jayson C. Vantuyl <vantuyl@csc.smsu.edu>
* and Bryon W. Roche <bryon@csc.smsu.edu>
*
* 64-bit addressing added by Kanoj Sarcar <kanoj@sgi.com>
* and Leo Dagum <dagum@sgi.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#include <linux/blkdev.h>
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/unistd.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/byteorder.h>
#include "scsi.h"
#include <scsi/scsi_host.h>
/*
* With the qlogic interface, every queue slot can hold a SCSI
* command with up to 4 scatter/gather entries. If we need more
* than 4 entries, continuation entries can be used that hold
* another 7 entries each. Unlike for other drivers, this means
* that the maximum number of scatter/gather entries we can
* support at any given time is a function of the number of queue
* slots available. That is, host->can_queue and host->sg_tablesize
* are dynamic and _not_ independent. This all works fine because
* requests are queued serially and the scatter/gather limit is
* determined for each queue request anew.
*/
#define QLOGICISP_REQ_QUEUE_LEN 63 /* must be power of two - 1 */
#define QLOGICISP_MAX_SG(ql) (4 + ((ql) > 0) ? 7*((ql) - 1) : 0)
/* Configuration section *****************************************************/
/* Set the following macro to 1 to reload the ISP1020's firmware. This is
the latest firmware provided by QLogic. This may be an earlier/later
revision than supplied by your board. */
#define RELOAD_FIRMWARE 1
/* Set the following macro to 1 to reload the ISP1020's defaults from nvram.
If you are not sure of your settings, leave this alone, the driver will
use a set of 'safe' defaults */
#define USE_NVRAM_DEFAULTS 0
/* Macros used for debugging */
#define DEBUG_ISP1020 0
#define DEBUG_ISP1020_INTR 0
#define DEBUG_ISP1020_SETUP 0
#define TRACE_ISP 0
#define DEFAULT_LOOP_COUNT 1000000
/* End Configuration section *************************************************/
#include <linux/module.h>
#if TRACE_ISP
# define TRACE_BUF_LEN (32*1024)
struct {
u_long next;
struct {
u_long time;
u_int index;
u_int addr;
u_char * name;
} buf[TRACE_BUF_LEN];
} trace;
#define TRACE(w, i, a) \
{ \
unsigned long flags; \
\
trace.buf[trace.next].name = (w); \
trace.buf[trace.next].time = jiffies; \
trace.buf[trace.next].index = (i); \
trace.buf[trace.next].addr = (long) (a); \
trace.next = (trace.next + 1) & (TRACE_BUF_LEN - 1); \
}
#else
# define TRACE(w, i, a)
#endif
#if DEBUG_ISP1020
#define ENTER(x) printk("isp1020 : entering %s()\n", x);
#define LEAVE(x) printk("isp1020 : leaving %s()\n", x);
#define DEBUG(x) x
#else
#define ENTER(x)
#define LEAVE(x)
#define DEBUG(x)
#endif /* DEBUG_ISP1020 */
#if DEBUG_ISP1020_INTR
#define ENTER_INTR(x) printk("isp1020 : entering %s()\n", x);
#define LEAVE_INTR(x) printk("isp1020 : leaving %s()\n", x);
#define DEBUG_INTR(x) x
#else
#define ENTER_INTR(x)
#define LEAVE_INTR(x)
#define DEBUG_INTR(x)
#endif /* DEBUG ISP1020_INTR */
#define ISP1020_REV_ID 1
#define MAX_TARGETS 16
#define MAX_LUNS 8
/* host configuration and control registers */
#define HOST_HCCR 0xc0 /* host command and control */
/* pci bus interface registers */
#define PCI_ID_LOW 0x00 /* vendor id */
#define PCI_ID_HIGH 0x02 /* device id */
#define ISP_CFG0 0x04 /* configuration register #0 */
#define ISP_CFG0_HWMSK 0x000f /* Hardware revision mask */
#define ISP_CFG0_1020 0x0001 /* ISP1020 */
#define ISP_CFG0_1020A 0x0002 /* ISP1020A */
#define ISP_CFG0_1040 0x0003 /* ISP1040 */
#define ISP_CFG0_1040A 0x0004 /* ISP1040A */
#define ISP_CFG0_1040B 0x0005 /* ISP1040B */
#define ISP_CFG0_1040C 0x0006 /* ISP1040C */
#define ISP_CFG1 0x06 /* configuration register #1 */
#define ISP_CFG1_F128 0x0040 /* 128-byte FIFO threshold */
#define ISP_CFG1_F64 0x0030 /* 128-byte FIFO threshold */
#define ISP_CFG1_F32 0x0020 /* 128-byte FIFO threshold */
#define ISP_CFG1_F16 0x0010 /* 128-byte FIFO threshold */
#define ISP_CFG1_BENAB 0x0004 /* Global Bus burst enable */
#define ISP_CFG1_SXP 0x0001 /* SXP register select */
#define PCI_INTF_CTL 0x08 /* pci interface control */
#define PCI_INTF_STS 0x0a /* pci interface status */
#define PCI_SEMAPHORE 0x0c /* pci semaphore */
#define PCI_NVRAM 0x0e /* pci nvram interface */
#define CDMA_CONF 0x20 /* Command DMA Config */
#define DDMA_CONF 0x40 /* Data DMA Config */
#define DMA_CONF_SENAB 0x0008 /* SXP to DMA Data enable */
#define DMA_CONF_RIRQ 0x0004 /* RISC interrupt enable */
#define DMA_CONF_BENAB 0x0002 /* Bus burst enable */
#define DMA_CONF_DIR 0x0001 /* DMA direction (0=fifo->host 1=host->fifo) */
/* mailbox registers */
#define MBOX0 0x70 /* mailbox 0 */
#define MBOX1 0x72 /* mailbox 1 */
#define MBOX2 0x74 /* mailbox 2 */
#define MBOX3 0x76 /* mailbox 3 */
#define MBOX4 0x78 /* mailbox 4 */
#define MBOX5 0x7a /* mailbox 5 */
#define MBOX6 0x7c /* mailbox 6 */
#define MBOX7 0x7e /* mailbox 7 */
/* mailbox command complete status codes */
#define MBOX_COMMAND_COMPLETE 0x4000
#define INVALID_COMMAND 0x4001
#define HOST_INTERFACE_ERROR 0x4002
#define TEST_FAILED 0x4003
#define COMMAND_ERROR 0x4005
#define COMMAND_PARAM_ERROR 0x4006
/* async event status codes */
#define ASYNC_SCSI_BUS_RESET 0x8001
#define SYSTEM_ERROR 0x8002
#define REQUEST_TRANSFER_ERROR 0x8003
#define RESPONSE_TRANSFER_ERROR 0x8004
#define REQUEST_QUEUE_WAKEUP 0x8005
#define EXECUTION_TIMEOUT_RESET 0x8006
#ifdef CONFIG_QL_ISP_A64
#define IOCB_SEGS 2
#define CONTINUATION_SEGS 5
#define MAX_CONTINUATION_ENTRIES 254
#else
#define IOCB_SEGS 4
#define CONTINUATION_SEGS 7
#endif /* CONFIG_QL_ISP_A64 */
struct Entry_header {
u_char entry_type;
u_char entry_cnt;
u_char sys_def_1;
u_char flags;
};
/* entry header type commands */
#ifdef CONFIG_QL_ISP_A64
#define ENTRY_COMMAND 9
#define ENTRY_CONTINUATION 0xa
#else
#define ENTRY_COMMAND 1
#define ENTRY_CONTINUATION 2
#endif /* CONFIG_QL_ISP_A64 */
#define ENTRY_STATUS 3
#define ENTRY_MARKER 4
#define ENTRY_EXTENDED_COMMAND 5
/* entry header flag definitions */
#define EFLAG_CONTINUATION 1
#define EFLAG_BUSY 2
#define EFLAG_BAD_HEADER 4
#define EFLAG_BAD_PAYLOAD 8
struct dataseg {
u_int d_base;
#ifdef CONFIG_QL_ISP_A64
u_int d_base_hi;
#endif
u_int d_count;
};
struct Command_Entry {
struct Entry_header hdr;
u_int handle;
u_char target_lun;
u_char target_id;
u_short cdb_length;
u_short control_flags;
u_short rsvd;
u_short time_out;
u_short segment_cnt;
u_char cdb[12];
#ifdef CONFIG_QL_ISP_A64
u_int rsvd1;
u_int rsvd2;
#endif
struct dataseg dataseg[IOCB_SEGS];
};
/* command entry control flag definitions */
#define CFLAG_NODISC 0x01
#define CFLAG_HEAD_TAG 0x02
#define CFLAG_ORDERED_TAG 0x04
#define CFLAG_SIMPLE_TAG 0x08
#define CFLAG_TAR_RTN 0x10
#define CFLAG_READ 0x20
#define CFLAG_WRITE 0x40
struct Ext_Command_Entry {
struct Entry_header hdr;
u_int handle;
u_char target_lun;
u_char target_id;
u_short cdb_length;
u_short control_flags;
u_short rsvd;
u_short time_out;
u_short segment_cnt;
u_char cdb[44];
};
struct Continuation_Entry {
struct Entry_header hdr;
#ifndef CONFIG_QL_ISP_A64
u_int reserved;
#endif
struct dataseg dataseg[CONTINUATION_SEGS];
};
struct Marker_Entry {
struct Entry_header hdr;
u_int reserved;
u_char target_lun;
u_char target_id;
u_char modifier;
u_char rsvd;
u_char rsvds[52];
};
/* marker entry modifier definitions */
#define SYNC_DEVICE 0
#define SYNC_TARGET 1
#define SYNC_ALL 2
struct Status_Entry {
struct Entry_header hdr;
u_int handle;
u_short scsi_status;
u_short completion_status;
u_short state_flags;
u_short status_flags;
u_short time;
u_short req_sense_len;
u_int residual;
u_char rsvd[8];
u_char req_sense_data[32];
};
/* status entry completion status definitions */
#define CS_COMPLETE 0x0000
#define CS_INCOMPLETE 0x0001
#define CS_DMA_ERROR 0x0002
#define CS_TRANSPORT_ERROR 0x0003
#define CS_RESET_OCCURRED 0x0004
#define CS_ABORTED 0x0005
#define CS_TIMEOUT 0x0006
#define CS_DATA_OVERRUN 0x0007
#define CS_COMMAND_OVERRUN 0x0008
#define CS_STATUS_OVERRUN 0x0009
#define CS_BAD_MESSAGE 0x000a
#define CS_NO_MESSAGE_OUT 0x000b
#define CS_EXT_ID_FAILED 0x000c
#define CS_IDE_MSG_FAILED 0x000d
#define CS_ABORT_MSG_FAILED 0x000e
#define CS_REJECT_MSG_FAILED 0x000f
#define CS_NOP_MSG_FAILED 0x0010
#define CS_PARITY_ERROR_MSG_FAILED 0x0011
#define CS_DEVICE_RESET_MSG_FAILED 0x0012
#define CS_ID_MSG_FAILED 0x0013
#define CS_UNEXP_BUS_FREE 0x0014
#define CS_DATA_UNDERRUN 0x0015
/* status entry state flag definitions */
#define SF_GOT_BUS 0x0100
#define SF_GOT_TARGET 0x0200
#define SF_SENT_CDB 0x0400
#define SF_TRANSFERRED_DATA 0x0800
#define SF_GOT_STATUS 0x1000
#define SF_GOT_SENSE 0x2000
/* status entry status flag definitions */
#define STF_DISCONNECT 0x0001
#define STF_SYNCHRONOUS 0x0002
#define STF_PARITY_ERROR 0x0004
#define STF_BUS_RESET 0x0008
#define STF_DEVICE_RESET 0x0010
#define STF_ABORTED 0x0020
#define STF_TIMEOUT 0x0040
#define STF_NEGOTIATION 0x0080
/* interface control commands */
#define ISP_RESET 0x0001
#define ISP_EN_INT 0x0002
#define ISP_EN_RISC 0x0004
/* host control commands */
#define HCCR_NOP 0x0000
#define HCCR_RESET 0x1000
#define HCCR_PAUSE 0x2000
#define HCCR_RELEASE 0x3000
#define HCCR_SINGLE_STEP 0x4000
#define HCCR_SET_HOST_INTR 0x5000
#define HCCR_CLEAR_HOST_INTR 0x6000
#define HCCR_CLEAR_RISC_INTR 0x7000
#define HCCR_BP_ENABLE 0x8000
#define HCCR_BIOS_DISABLE 0x9000
#define HCCR_TEST_MODE 0xf000
#define RISC_BUSY 0x0004
/* mailbox commands */
#define MBOX_NO_OP 0x0000
#define MBOX_LOAD_RAM 0x0001
#define MBOX_EXEC_FIRMWARE 0x0002
#define MBOX_DUMP_RAM 0x0003
#define MBOX_WRITE_RAM_WORD 0x0004
#define MBOX_READ_RAM_WORD 0x0005
#define MBOX_MAILBOX_REG_TEST 0x0006
#define MBOX_VERIFY_CHECKSUM 0x0007
#define MBOX_ABOUT_FIRMWARE 0x0008
#define MBOX_CHECK_FIRMWARE 0x000e
#define MBOX_INIT_REQ_QUEUE 0x0010
#define MBOX_INIT_RES_QUEUE 0x0011
#define MBOX_EXECUTE_IOCB 0x0012
#define MBOX_WAKE_UP 0x0013
#define MBOX_STOP_FIRMWARE 0x0014
#define MBOX_ABORT 0x0015
#define MBOX_ABORT_DEVICE 0x0016
#define MBOX_ABORT_TARGET 0x0017
#define MBOX_BUS_RESET 0x0018
#define MBOX_STOP_QUEUE 0x0019
#define MBOX_START_QUEUE 0x001a
#define MBOX_SINGLE_STEP_QUEUE 0x001b
#define MBOX_ABORT_QUEUE 0x001c
#define MBOX_GET_DEV_QUEUE_STATUS 0x001d
#define MBOX_GET_FIRMWARE_STATUS 0x001f
#define MBOX_GET_INIT_SCSI_ID 0x0020
#define MBOX_GET_SELECT_TIMEOUT 0x0021
#define MBOX_GET_RETRY_COUNT 0x0022
#define MBOX_GET_TAG_AGE_LIMIT 0x0023
#define MBOX_GET_CLOCK_RATE 0x0024
#define MBOX_GET_ACT_NEG_STATE 0x0025
#define MBOX_GET_ASYNC_DATA_SETUP_TIME 0x0026
#define MBOX_GET_PCI_PARAMS 0x0027
#define MBOX_GET_TARGET_PARAMS 0x0028
#define MBOX_GET_DEV_QUEUE_PARAMS 0x0029
#define MBOX_SET_INIT_SCSI_ID 0x0030
#define MBOX_SET_SELECT_TIMEOUT 0x0031
#define MBOX_SET_RETRY_COUNT 0x0032
#define MBOX_SET_TAG_AGE_LIMIT 0x0033
#define MBOX_SET_CLOCK_RATE 0x0034
#define MBOX_SET_ACTIVE_NEG_STATE 0x0035
#define MBOX_SET_ASYNC_DATA_SETUP_TIME 0x0036
#define MBOX_SET_PCI_CONTROL_PARAMS 0x0037
#define MBOX_SET_TARGET_PARAMS 0x0038
#define MBOX_SET_DEV_QUEUE_PARAMS 0x0039
#define MBOX_RETURN_BIOS_BLOCK_ADDR 0x0040
#define MBOX_WRITE_FOUR_RAM_WORDS 0x0041
#define MBOX_EXEC_BIOS_IOCB 0x0042
#ifdef CONFIG_QL_ISP_A64
#define MBOX_CMD_INIT_REQUEST_QUEUE_64 0x0052
#define MBOX_CMD_INIT_RESPONSE_QUEUE_64 0x0053
#endif /* CONFIG_QL_ISP_A64 */
#include "qlogicisp_asm.c"
#define PACKB(a, b) (((a)<<4)|(b))
static const u_char mbox_param[] = {
PACKB(1, 1), /* MBOX_NO_OP */
PACKB(5, 5), /* MBOX_LOAD_RAM */
PACKB(2, 0), /* MBOX_EXEC_FIRMWARE */
PACKB(5, 5), /* MBOX_DUMP_RAM */
PACKB(3, 3), /* MBOX_WRITE_RAM_WORD */
PACKB(2, 3), /* MBOX_READ_RAM_WORD */
PACKB(6, 6), /* MBOX_MAILBOX_REG_TEST */
PACKB(2, 3), /* MBOX_VERIFY_CHECKSUM */
PACKB(1, 3), /* MBOX_ABOUT_FIRMWARE */
PACKB(0, 0), /* 0x0009 */
PACKB(0, 0), /* 0x000a */
PACKB(0, 0), /* 0x000b */
PACKB(0, 0), /* 0x000c */
PACKB(0, 0), /* 0x000d */
PACKB(1, 2), /* MBOX_CHECK_FIRMWARE */
PACKB(0, 0), /* 0x000f */
PACKB(5, 5), /* MBOX_INIT_REQ_QUEUE */
PACKB(6, 6), /* MBOX_INIT_RES_QUEUE */
PACKB(4, 4), /* MBOX_EXECUTE_IOCB */
PACKB(2, 2), /* MBOX_WAKE_UP */
PACKB(1, 6), /* MBOX_STOP_FIRMWARE */
PACKB(4, 4), /* MBOX_ABORT */
PACKB(2, 2), /* MBOX_ABORT_DEVICE */
PACKB(3, 3), /* MBOX_ABORT_TARGET */
PACKB(2, 2), /* MBOX_BUS_RESET */
PACKB(2, 3), /* MBOX_STOP_QUEUE */
PACKB(2, 3), /* MBOX_START_QUEUE */
PACKB(2, 3), /* MBOX_SINGLE_STEP_QUEUE */
PACKB(2, 3), /* MBOX_ABORT_QUEUE */
PACKB(2, 4), /* MBOX_GET_DEV_QUEUE_STATUS */
PACKB(0, 0), /* 0x001e */
PACKB(1, 3), /* MBOX_GET_FIRMWARE_STATUS */
PACKB(1, 2), /* MBOX_GET_INIT_SCSI_ID */
PACKB(1, 2), /* MBOX_GET_SELECT_TIMEOUT */
PACKB(1, 3), /* MBOX_GET_RETRY_COUNT */
PACKB(1, 2), /* MBOX_GET_TAG_AGE_LIMIT */
PACKB(1, 2), /* MBOX_GET_CLOCK_RATE */
PACKB(1, 2), /* MBOX_GET_ACT_NEG_STATE */
PACKB(1, 2), /* MBOX_GET_ASYNC_DATA_SETUP_TIME */
PACKB(1, 3), /* MBOX_GET_PCI_PARAMS */
PACKB(2, 4), /* MBOX_GET_TARGET_PARAMS */
PACKB(2, 4), /* MBOX_GET_DEV_QUEUE_PARAMS */
PACKB(0, 0), /* 0x002a */
PACKB(0, 0), /* 0x002b */
PACKB(0, 0), /* 0x002c */
PACKB(0, 0), /* 0x002d */
PACKB(0, 0), /* 0x002e */
PACKB(0, 0), /* 0x002f */
PACKB(2, 2), /* MBOX_SET_INIT_SCSI_ID */
PACKB(2, 2), /* MBOX_SET_SELECT_TIMEOUT */
PACKB(3, 3), /* MBOX_SET_RETRY_COUNT */
PACKB(2, 2), /* MBOX_SET_TAG_AGE_LIMIT */
PACKB(2, 2), /* MBOX_SET_CLOCK_RATE */
PACKB(2, 2), /* MBOX_SET_ACTIVE_NEG_STATE */
PACKB(2, 2), /* MBOX_SET_ASYNC_DATA_SETUP_TIME */
PACKB(3, 3), /* MBOX_SET_PCI_CONTROL_PARAMS */
PACKB(4, 4), /* MBOX_SET_TARGET_PARAMS */
PACKB(4, 4), /* MBOX_SET_DEV_QUEUE_PARAMS */
PACKB(0, 0), /* 0x003a */
PACKB(0, 0), /* 0x003b */
PACKB(0, 0), /* 0x003c */
PACKB(0, 0), /* 0x003d */
PACKB(0, 0), /* 0x003e */
PACKB(0, 0), /* 0x003f */
PACKB(1, 2), /* MBOX_RETURN_BIOS_BLOCK_ADDR */
PACKB(6, 1), /* MBOX_WRITE_FOUR_RAM_WORDS */
PACKB(2, 3) /* MBOX_EXEC_BIOS_IOCB */
#ifdef CONFIG_QL_ISP_A64
,PACKB(0, 0), /* 0x0043 */
PACKB(0, 0), /* 0x0044 */
PACKB(0, 0), /* 0x0045 */
PACKB(0, 0), /* 0x0046 */
PACKB(0, 0), /* 0x0047 */
PACKB(0, 0), /* 0x0048 */
PACKB(0, 0), /* 0x0049 */
PACKB(0, 0), /* 0x004a */
PACKB(0, 0), /* 0x004b */
PACKB(0, 0), /* 0x004c */
PACKB(0, 0), /* 0x004d */
PACKB(0, 0), /* 0x004e */
PACKB(0, 0), /* 0x004f */
PACKB(0, 0), /* 0x0050 */
PACKB(0, 0), /* 0x0051 */
PACKB(8, 8), /* MBOX_CMD_INIT_REQUEST_QUEUE_64 (0x0052) */
PACKB(8, 8) /* MBOX_CMD_INIT_RESPONSE_QUEUE_64 (0x0053) */
#endif /* CONFIG_QL_ISP_A64 */
};
#define MAX_MBOX_COMMAND (sizeof(mbox_param)/sizeof(u_short))
struct host_param {
u_short fifo_threshold;
u_short host_adapter_enable;
u_short initiator_scsi_id;
u_short bus_reset_delay;
u_short retry_count;
u_short retry_delay;
u_short async_data_setup_time;
u_short req_ack_active_negation;
u_short data_line_active_negation;
u_short data_dma_burst_enable;
u_short command_dma_burst_enable;
u_short tag_aging;
u_short selection_timeout;
u_short max_queue_depth;
};
/*
* Device Flags:
*
* Bit Name
* ---------
* 7 Disconnect Privilege
* 6 Parity Checking
* 5 Wide Data Transfers
* 4 Synchronous Data Transfers
* 3 Tagged Queuing
* 2 Automatic Request Sense
* 1 Stop Queue on Check Condition
* 0 Renegotiate on Error
*/
struct dev_param {
u_short device_flags;
u_short execution_throttle;
u_short synchronous_period;
u_short synchronous_offset;
u_short device_enable;
u_short reserved; /* pad */
};
/*
* The result queue can be quite a bit smaller since continuation entries
* do not show up there:
*/
#define RES_QUEUE_LEN ((QLOGICISP_REQ_QUEUE_LEN + 1) / 8 - 1)
#define QUEUE_ENTRY_LEN 64
#define QSIZE(entries) (((entries) + 1) * QUEUE_ENTRY_LEN)
struct isp_queue_entry {
char __opaque[QUEUE_ENTRY_LEN];
};
struct isp1020_hostdata {
void __iomem *memaddr;
u_char revision;
struct host_param host_param;
struct dev_param dev_param[MAX_TARGETS];
struct pci_dev *pci_dev;
struct isp_queue_entry *res_cpu; /* CPU-side address of response queue. */
struct isp_queue_entry *req_cpu; /* CPU-size address of request queue. */
/* result and request queues (shared with isp1020): */
u_int req_in_ptr; /* index of next request slot */
u_int res_out_ptr; /* index of next result slot */
/* this is here so the queues are nicely aligned */
long send_marker; /* do we need to send a marker? */
/* The cmd->handle has a fixed size, and is only 32-bits. We
* need to take care to handle 64-bit systems correctly thus what
* we actually place in cmd->handle is an index to the following
* table. Kudos to Matt Jacob for the technique. -DaveM
*/
Scsi_Cmnd *cmd_slots[QLOGICISP_REQ_QUEUE_LEN + 1];
dma_addr_t res_dma; /* PCI side view of response queue */
dma_addr_t req_dma; /* PCI side view of request queue */
};
/* queue length's _must_ be power of two: */
#define QUEUE_DEPTH(in, out, ql) ((in - out) & (ql))
#define REQ_QUEUE_DEPTH(in, out) QUEUE_DEPTH(in, out, \
QLOGICISP_REQ_QUEUE_LEN)
#define RES_QUEUE_DEPTH(in, out) QUEUE_DEPTH(in, out, RES_QUEUE_LEN)
static void isp1020_enable_irqs(struct Scsi_Host *);
static void isp1020_disable_irqs(struct Scsi_Host *);
static int isp1020_init(struct Scsi_Host *);
static int isp1020_reset_hardware(struct Scsi_Host *);
static int isp1020_set_defaults(struct Scsi_Host *);
static int isp1020_load_parameters(struct Scsi_Host *);
static int isp1020_mbox_command(struct Scsi_Host *, u_short []);
static int isp1020_return_status(struct Status_Entry *);
static void isp1020_intr_handler(int, void *, struct pt_regs *);
static irqreturn_t do_isp1020_intr_handler(int, void *, struct pt_regs *);
#if USE_NVRAM_DEFAULTS
static int isp1020_get_defaults(struct Scsi_Host *);
static int isp1020_verify_nvram(struct Scsi_Host *);
static u_short isp1020_read_nvram_word(struct Scsi_Host *, u_short);
#endif
#if DEBUG_ISP1020
static void isp1020_print_scsi_cmd(Scsi_Cmnd *);
#endif
#if DEBUG_ISP1020_INTR
static void isp1020_print_status_entry(struct Status_Entry *);
#endif
/* memaddr should be used to determine if memmapped port i/o is being used
* non-null memaddr == mmap'd
* JV 7-Jan-2000
*/
static inline u_short isp_inw(struct Scsi_Host *host, long offset)
{
struct isp1020_hostdata *h = (struct isp1020_hostdata *)host->hostdata;
if (h->memaddr)
return readw(h->memaddr + offset);
else
return inw(host->io_port + offset);
}
static inline void isp_outw(u_short val, struct Scsi_Host *host, long offset)
{
struct isp1020_hostdata *h = (struct isp1020_hostdata *)host->hostdata;
if (h->memaddr)
writew(val, h->memaddr + offset);
else
outw(val, host->io_port + offset);
}
static inline void isp1020_enable_irqs(struct Scsi_Host *host)
{
isp_outw(ISP_EN_INT|ISP_EN_RISC, host, PCI_INTF_CTL);
}
static inline void isp1020_disable_irqs(struct Scsi_Host *host)
{
isp_outw(0x0, host, PCI_INTF_CTL);
}
static int isp1020_detect(Scsi_Host_Template *tmpt)
{
int hosts = 0;
struct Scsi_Host *host;
struct isp1020_hostdata *hostdata;
struct pci_dev *pdev = NULL;
ENTER("isp1020_detect");
tmpt->proc_name = "isp1020";
while ((pdev = pci_find_device(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP1020, pdev)))
{
if (pci_enable_device(pdev))
continue;
host = scsi_register(tmpt, sizeof(struct isp1020_hostdata));
if (!host)
continue;
hostdata = (struct isp1020_hostdata *) host->hostdata;
memset(hostdata, 0, sizeof(struct isp1020_hostdata));
hostdata->pci_dev = pdev;
scsi_set_device(host, &pdev->dev);
if (isp1020_init(host))
goto fail_and_unregister;
if (isp1020_reset_hardware(host)
#if USE_NVRAM_DEFAULTS
|| isp1020_get_defaults(host)
#else
|| isp1020_set_defaults(host)
#endif /* USE_NVRAM_DEFAULTS */
|| isp1020_load_parameters(host)) {
goto fail_uninit;
}
host->this_id = hostdata->host_param.initiator_scsi_id;
host->max_sectors = 64;
if (request_irq(host->irq, do_isp1020_intr_handler, SA_INTERRUPT | SA_SHIRQ,
"qlogicisp", host))
{
printk("qlogicisp : interrupt %d already in use\n",
host->irq);
goto fail_uninit;
}
isp_outw(0x0, host, PCI_SEMAPHORE);
isp_outw(HCCR_CLEAR_RISC_INTR, host, HOST_HCCR);
isp1020_enable_irqs(host);
hosts++;
continue;
fail_uninit:
iounmap(hostdata->memaddr);
release_region(host->io_port, 0xff);
fail_and_unregister:
if (hostdata->res_cpu)
pci_free_consistent(hostdata->pci_dev,
QSIZE(RES_QUEUE_LEN),
hostdata->res_cpu,
hostdata->res_dma);
if (hostdata->req_cpu)
pci_free_consistent(hostdata->pci_dev,
QSIZE(QLOGICISP_REQ_QUEUE_LEN),
hostdata->req_cpu,
hostdata->req_dma);
scsi_unregister(host);
}
LEAVE("isp1020_detect");
return hosts;
}
static int isp1020_release(struct Scsi_Host *host)
{
struct isp1020_hostdata *hostdata;
ENTER("isp1020_release");
hostdata = (struct isp1020_hostdata *) host->hostdata;
isp_outw(0x0, host, PCI_INTF_CTL);
free_irq(host->irq, host);
iounmap(hostdata->memaddr);
release_region(host->io_port, 0xff);
LEAVE("isp1020_release");
return 0;
}
static const char *isp1020_info(struct Scsi_Host *host)
{
static char buf[80];
struct isp1020_hostdata *hostdata;
ENTER("isp1020_info");
hostdata = (struct isp1020_hostdata *) host->hostdata;
sprintf(buf,
"QLogic ISP1020 SCSI on PCI bus %02x device %02x irq %d %s base 0x%lx",
hostdata->pci_dev->bus->number, hostdata->pci_dev->devfn, host->irq,
(hostdata->memaddr ? "MEM" : "I/O"),
(hostdata->memaddr ? (unsigned long)hostdata->memaddr : host->io_port));
LEAVE("isp1020_info");
return buf;
}
/*
* The middle SCSI layer ensures that queuecommand never gets invoked
* concurrently with itself or the interrupt handler (though the
* interrupt handler may call this routine as part of
* request-completion handling).
*/
static int isp1020_queuecommand(Scsi_Cmnd *Cmnd, void (*done)(Scsi_Cmnd *))
{
int i, n, num_free;
u_int in_ptr, out_ptr;
struct dataseg * ds;
struct scatterlist *sg;
struct Command_Entry *cmd;
struct Continuation_Entry *cont;
struct Scsi_Host *host;
struct isp1020_hostdata *hostdata;
dma_addr_t dma_addr;
ENTER("isp1020_queuecommand");
host = Cmnd->device->host;
hostdata = (struct isp1020_hostdata *) host->hostdata;
Cmnd->scsi_done = done;
DEBUG(isp1020_print_scsi_cmd(Cmnd));
out_ptr = isp_inw(host, + MBOX4);
in_ptr = hostdata->req_in_ptr;
DEBUG(printk("qlogicisp : request queue depth %d\n",
REQ_QUEUE_DEPTH(in_ptr, out_ptr)));
cmd = (struct Command_Entry *) &hostdata->req_cpu[in_ptr];
in_ptr = (in_ptr + 1) & QLOGICISP_REQ_QUEUE_LEN;
if (in_ptr == out_ptr) {
printk("qlogicisp : request queue overflow\n");
return 1;
}
if (hostdata->send_marker) {
struct Marker_Entry *marker;
TRACE("queue marker", in_ptr, 0);
DEBUG(printk("qlogicisp : adding marker entry\n"));
marker = (struct Marker_Entry *) cmd;
memset(marker, 0, sizeof(struct Marker_Entry));
marker->hdr.entry_type = ENTRY_MARKER;
marker->hdr.entry_cnt = 1;
marker->modifier = SYNC_ALL;
hostdata->send_marker = 0;
if (((in_ptr + 1) & QLOGICISP_REQ_QUEUE_LEN) == out_ptr) {
isp_outw(in_ptr, host, MBOX4);
hostdata->req_in_ptr = in_ptr;
printk("qlogicisp : request queue overflow\n");
return 1;
}
cmd = (struct Command_Entry *) &hostdata->req_cpu[in_ptr];
in_ptr = (in_ptr + 1) & QLOGICISP_REQ_QUEUE_LEN;
}
TRACE("queue command", in_ptr, Cmnd);
memset(cmd, 0, sizeof(struct Command_Entry));
cmd->hdr.entry_type = ENTRY_COMMAND;
cmd->hdr.entry_cnt = 1;
cmd->target_lun = Cmnd->device->lun;
cmd->target_id = Cmnd->device->id;
cmd->cdb_length = cpu_to_le16(Cmnd->cmd_len);
cmd->control_flags = cpu_to_le16(CFLAG_READ | CFLAG_WRITE);
cmd->time_out = cpu_to_le16(30);
memcpy(cmd->cdb, Cmnd->cmnd, Cmnd->cmd_len);
if (Cmnd->use_sg) {
int sg_count;
sg = (struct scatterlist *) Cmnd->request_buffer;
ds = cmd->dataseg;
sg_count = pci_map_sg(hostdata->pci_dev, sg, Cmnd->use_sg,
[PATCH] remove old scsi data direction macros these have been wrappers for the generic dma direction bits since 2.5.x. This patch converts the few remaining drivers and removes the macros. Arjan noticed there's some hunk in here that shouldn't. Updated patch below: Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-04-17 14:26:13 -06:00
Cmnd->sc_data_direction);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
cmd->segment_cnt = cpu_to_le16(sg_count);
/* fill in first four sg entries: */
n = sg_count;
if (n > IOCB_SEGS)
n = IOCB_SEGS;
for (i = 0; i < n; i++) {
dma_addr = sg_dma_address(sg);
ds[i].d_base = cpu_to_le32((u32) dma_addr);
#ifdef CONFIG_QL_ISP_A64
ds[i].d_base_hi = cpu_to_le32((u32) (dma_addr>>32));
#endif /* CONFIG_QL_ISP_A64 */
ds[i].d_count = cpu_to_le32(sg_dma_len(sg));
++sg;
}
sg_count -= IOCB_SEGS;
while (sg_count > 0) {
++cmd->hdr.entry_cnt;
cont = (struct Continuation_Entry *)
&hostdata->req_cpu[in_ptr];
in_ptr = (in_ptr + 1) & QLOGICISP_REQ_QUEUE_LEN;
if (in_ptr == out_ptr) {
printk("isp1020: unexpected request queue "
"overflow\n");
return 1;
}
TRACE("queue continuation", in_ptr, 0);
cont->hdr.entry_type = ENTRY_CONTINUATION;
cont->hdr.entry_cnt = 0;
cont->hdr.sys_def_1 = 0;
cont->hdr.flags = 0;
#ifndef CONFIG_QL_ISP_A64
cont->reserved = 0;
#endif
ds = cont->dataseg;
n = sg_count;
if (n > CONTINUATION_SEGS)
n = CONTINUATION_SEGS;
for (i = 0; i < n; ++i) {
dma_addr = sg_dma_address(sg);
ds[i].d_base = cpu_to_le32((u32) dma_addr);
#ifdef CONFIG_QL_ISP_A64
ds[i].d_base_hi = cpu_to_le32((u32)(dma_addr>>32));
#endif /* CONFIG_QL_ISP_A64 */
ds[i].d_count = cpu_to_le32(sg_dma_len(sg));
++sg;
}
sg_count -= n;
}
} else if (Cmnd->request_bufflen) {
/*Cmnd->SCp.ptr = (char *)(unsigned long)*/
dma_addr = pci_map_single(hostdata->pci_dev,
Cmnd->request_buffer,
Cmnd->request_bufflen,
[PATCH] remove old scsi data direction macros these have been wrappers for the generic dma direction bits since 2.5.x. This patch converts the few remaining drivers and removes the macros. Arjan noticed there's some hunk in here that shouldn't. Updated patch below: Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-04-17 14:26:13 -06:00
Cmnd->sc_data_direction);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
Cmnd->SCp.ptr = (char *)(unsigned long) dma_addr;
cmd->dataseg[0].d_base =
cpu_to_le32((u32) dma_addr);
#ifdef CONFIG_QL_ISP_A64
cmd->dataseg[0].d_base_hi =
cpu_to_le32((u32) (dma_addr>>32));
#endif /* CONFIG_QL_ISP_A64 */
cmd->dataseg[0].d_count =
cpu_to_le32((u32)Cmnd->request_bufflen);
cmd->segment_cnt = cpu_to_le16(1);
} else {
cmd->dataseg[0].d_base = 0;
#ifdef CONFIG_QL_ISP_A64
cmd->dataseg[0].d_base_hi = 0;
#endif /* CONFIG_QL_ISP_A64 */
cmd->dataseg[0].d_count = 0;
cmd->segment_cnt = cpu_to_le16(1); /* Shouldn't this be 0? */
}
/* Committed, record Scsi_Cmd so we can find it later. */
cmd->handle = in_ptr;
hostdata->cmd_slots[in_ptr] = Cmnd;
isp_outw(in_ptr, host, MBOX4);
hostdata->req_in_ptr = in_ptr;
num_free = QLOGICISP_REQ_QUEUE_LEN - REQ_QUEUE_DEPTH(in_ptr, out_ptr);
host->can_queue = host->host_busy + num_free;
host->sg_tablesize = QLOGICISP_MAX_SG(num_free);
LEAVE("isp1020_queuecommand");
return 0;
}
#define ASYNC_EVENT_INTERRUPT 0x01
irqreturn_t do_isp1020_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
{
struct Scsi_Host *host = dev_id;
unsigned long flags;
spin_lock_irqsave(host->host_lock, flags);
isp1020_intr_handler(irq, dev_id, regs);
spin_unlock_irqrestore(host->host_lock, flags);
return IRQ_HANDLED;
}
void isp1020_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
{
Scsi_Cmnd *Cmnd;
struct Status_Entry *sts;
struct Scsi_Host *host = dev_id;
struct isp1020_hostdata *hostdata;
u_int in_ptr, out_ptr;
u_short status;
ENTER_INTR("isp1020_intr_handler");
hostdata = (struct isp1020_hostdata *) host->hostdata;
DEBUG_INTR(printk("qlogicisp : interrupt on line %d\n", irq));
if (!(isp_inw(host, PCI_INTF_STS) & 0x04)) {
/* spurious interrupts can happen legally */
DEBUG_INTR(printk("qlogicisp: got spurious interrupt\n"));
return;
}
in_ptr = isp_inw(host, MBOX5);
isp_outw(HCCR_CLEAR_RISC_INTR, host, HOST_HCCR);
if ((isp_inw(host, PCI_SEMAPHORE) & ASYNC_EVENT_INTERRUPT)) {
status = isp_inw(host, MBOX0);
DEBUG_INTR(printk("qlogicisp : mbox completion status: %x\n",
status));
switch (status) {
case ASYNC_SCSI_BUS_RESET:
case EXECUTION_TIMEOUT_RESET:
hostdata->send_marker = 1;
break;
case INVALID_COMMAND:
case HOST_INTERFACE_ERROR:
case COMMAND_ERROR:
case COMMAND_PARAM_ERROR:
printk("qlogicisp : bad mailbox return status\n");
break;
}
isp_outw(0x0, host, PCI_SEMAPHORE);
}
out_ptr = hostdata->res_out_ptr;
DEBUG_INTR(printk("qlogicisp : response queue update\n"));
DEBUG_INTR(printk("qlogicisp : response queue depth %d\n",
QUEUE_DEPTH(in_ptr, out_ptr, RES_QUEUE_LEN)));
while (out_ptr != in_ptr) {
u_int cmd_slot;
sts = (struct Status_Entry *) &hostdata->res_cpu[out_ptr];
out_ptr = (out_ptr + 1) & RES_QUEUE_LEN;
cmd_slot = sts->handle;
Cmnd = hostdata->cmd_slots[cmd_slot];
hostdata->cmd_slots[cmd_slot] = NULL;
TRACE("done", out_ptr, Cmnd);
if (le16_to_cpu(sts->completion_status) == CS_RESET_OCCURRED
|| le16_to_cpu(sts->completion_status) == CS_ABORTED
|| (le16_to_cpu(sts->status_flags) & STF_BUS_RESET))
hostdata->send_marker = 1;
if (le16_to_cpu(sts->state_flags) & SF_GOT_SENSE)
memcpy(Cmnd->sense_buffer, sts->req_sense_data,
sizeof(Cmnd->sense_buffer));
DEBUG_INTR(isp1020_print_status_entry(sts));
if (sts->hdr.entry_type == ENTRY_STATUS)
Cmnd->result = isp1020_return_status(sts);
else
Cmnd->result = DID_ERROR << 16;
if (Cmnd->use_sg)
pci_unmap_sg(hostdata->pci_dev,
(struct scatterlist *)Cmnd->buffer,
Cmnd->use_sg,
[PATCH] remove old scsi data direction macros these have been wrappers for the generic dma direction bits since 2.5.x. This patch converts the few remaining drivers and removes the macros. Arjan noticed there's some hunk in here that shouldn't. Updated patch below: Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-04-17 14:26:13 -06:00
Cmnd->sc_data_direction);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
else if (Cmnd->request_bufflen)
pci_unmap_single(hostdata->pci_dev,
#ifdef CONFIG_QL_ISP_A64
(dma_addr_t)((long)Cmnd->SCp.ptr),
#else
(u32)((long)Cmnd->SCp.ptr),
#endif
Cmnd->request_bufflen,
[PATCH] remove old scsi data direction macros these have been wrappers for the generic dma direction bits since 2.5.x. This patch converts the few remaining drivers and removes the macros. Arjan noticed there's some hunk in here that shouldn't. Updated patch below: Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-04-17 14:26:13 -06:00
Cmnd->sc_data_direction);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
isp_outw(out_ptr, host, MBOX5);
(*Cmnd->scsi_done)(Cmnd);
}
hostdata->res_out_ptr = out_ptr;
LEAVE_INTR("isp1020_intr_handler");
}
static int isp1020_return_status(struct Status_Entry *sts)
{
int host_status = DID_ERROR;
#if DEBUG_ISP1020_INTR
static char *reason[] = {
"DID_OK",
"DID_NO_CONNECT",
"DID_BUS_BUSY",
"DID_TIME_OUT",
"DID_BAD_TARGET",
"DID_ABORT",
"DID_PARITY",
"DID_ERROR",
"DID_RESET",
"DID_BAD_INTR"
};
#endif /* DEBUG_ISP1020_INTR */
ENTER("isp1020_return_status");
DEBUG(printk("qlogicisp : completion status = 0x%04x\n",
le16_to_cpu(sts->completion_status)));
switch(le16_to_cpu(sts->completion_status)) {
case CS_COMPLETE:
host_status = DID_OK;
break;
case CS_INCOMPLETE:
if (!(le16_to_cpu(sts->state_flags) & SF_GOT_BUS))
host_status = DID_NO_CONNECT;
else if (!(le16_to_cpu(sts->state_flags) & SF_GOT_TARGET))
host_status = DID_BAD_TARGET;
else if (!(le16_to_cpu(sts->state_flags) & SF_SENT_CDB))
host_status = DID_ERROR;
else if (!(le16_to_cpu(sts->state_flags) & SF_TRANSFERRED_DATA))
host_status = DID_ERROR;
else if (!(le16_to_cpu(sts->state_flags) & SF_GOT_STATUS))
host_status = DID_ERROR;
else if (!(le16_to_cpu(sts->state_flags) & SF_GOT_SENSE))
host_status = DID_ERROR;
break;
case CS_DMA_ERROR:
case CS_TRANSPORT_ERROR:
host_status = DID_ERROR;
break;
case CS_RESET_OCCURRED:
host_status = DID_RESET;
break;
case CS_ABORTED:
host_status = DID_ABORT;
break;
case CS_TIMEOUT:
host_status = DID_TIME_OUT;
break;
case CS_DATA_OVERRUN:
case CS_COMMAND_OVERRUN:
case CS_STATUS_OVERRUN:
case CS_BAD_MESSAGE:
case CS_NO_MESSAGE_OUT:
case CS_EXT_ID_FAILED:
case CS_IDE_MSG_FAILED:
case CS_ABORT_MSG_FAILED:
case CS_NOP_MSG_FAILED:
case CS_PARITY_ERROR_MSG_FAILED:
case CS_DEVICE_RESET_MSG_FAILED:
case CS_ID_MSG_FAILED:
case CS_UNEXP_BUS_FREE:
host_status = DID_ERROR;
break;
case CS_DATA_UNDERRUN:
host_status = DID_OK;
break;
default:
printk("qlogicisp : unknown completion status 0x%04x\n",
le16_to_cpu(sts->completion_status));
host_status = DID_ERROR;
break;
}
DEBUG_INTR(printk("qlogicisp : host status (%s) scsi status %x\n",
reason[host_status], le16_to_cpu(sts->scsi_status)));
LEAVE("isp1020_return_status");
return (le16_to_cpu(sts->scsi_status) & STATUS_MASK) | (host_status << 16);
}
static int isp1020_biosparam(struct scsi_device *sdev, struct block_device *n,
sector_t capacity, int ip[])
{
int size = capacity;
ENTER("isp1020_biosparam");
ip[0] = 64;
ip[1] = 32;
ip[2] = size >> 11;
if (ip[2] > 1024) {
ip[0] = 255;
ip[1] = 63;
ip[2] = size / (ip[0] * ip[1]);
#if 0
if (ip[2] > 1023)
ip[2] = 1023;
#endif
}
LEAVE("isp1020_biosparam");
return 0;
}
static int isp1020_reset_hardware(struct Scsi_Host *host)
{
u_short param[6];
int loop_count;
ENTER("isp1020_reset_hardware");
isp_outw(ISP_RESET, host, PCI_INTF_CTL);
udelay(100);
isp_outw(HCCR_RESET, host, HOST_HCCR);
udelay(100);
isp_outw(HCCR_RELEASE, host, HOST_HCCR);
isp_outw(HCCR_BIOS_DISABLE, host, HOST_HCCR);
loop_count = DEFAULT_LOOP_COUNT;
while (--loop_count && isp_inw(host, HOST_HCCR) == RISC_BUSY) {
barrier();
cpu_relax();
}
if (!loop_count)
printk("qlogicisp: reset_hardware loop timeout\n");
isp_outw(0, host, ISP_CFG1);
#if DEBUG_ISP1020
printk("qlogicisp : mbox 0 0x%04x \n", isp_inw(host, MBOX0));
printk("qlogicisp : mbox 1 0x%04x \n", isp_inw(host, MBOX1));
printk("qlogicisp : mbox 2 0x%04x \n", isp_inw(host, MBOX2));
printk("qlogicisp : mbox 3 0x%04x \n", isp_inw(host, MBOX3));
printk("qlogicisp : mbox 4 0x%04x \n", isp_inw(host, MBOX4));
printk("qlogicisp : mbox 5 0x%04x \n", isp_inw(host, MBOX5));
#endif /* DEBUG_ISP1020 */
param[0] = MBOX_NO_OP;
isp1020_mbox_command(host, param);
if (param[0] != MBOX_COMMAND_COMPLETE) {
printk("qlogicisp : NOP test failed\n");
return 1;
}
DEBUG(printk("qlogicisp : loading risc ram\n"));
#if RELOAD_FIRMWARE
for (loop_count = 0; loop_count < risc_code_length01; loop_count++) {
param[0] = MBOX_WRITE_RAM_WORD;
param[1] = risc_code_addr01 + loop_count;
param[2] = risc_code01[loop_count];
isp1020_mbox_command(host, param);
if (param[0] != MBOX_COMMAND_COMPLETE) {
printk("qlogicisp : firmware load failure at %d\n",
loop_count);
return 1;
}
}
#endif /* RELOAD_FIRMWARE */
DEBUG(printk("qlogicisp : verifying checksum\n"));
param[0] = MBOX_VERIFY_CHECKSUM;
param[1] = risc_code_addr01;
isp1020_mbox_command(host, param);
if (param[0] != MBOX_COMMAND_COMPLETE) {
printk("qlogicisp : ram checksum failure\n");
return 1;
}
DEBUG(printk("qlogicisp : executing firmware\n"));
param[0] = MBOX_EXEC_FIRMWARE;
param[1] = risc_code_addr01;
isp1020_mbox_command(host, param);
param[0] = MBOX_ABOUT_FIRMWARE;
isp1020_mbox_command(host, param);
if (param[0] != MBOX_COMMAND_COMPLETE) {
printk("qlogicisp : about firmware failure\n");
return 1;
}
DEBUG(printk("qlogicisp : firmware major revision %d\n", param[1]));
DEBUG(printk("qlogicisp : firmware minor revision %d\n", param[2]));
LEAVE("isp1020_reset_hardware");
return 0;
}
static int isp1020_init(struct Scsi_Host *sh)
{
u_long io_base, mem_base, io_flags, mem_flags;
struct isp1020_hostdata *hostdata;
u_char revision;
u_int irq;
u_short command;
struct pci_dev *pdev;
ENTER("isp1020_init");
hostdata = (struct isp1020_hostdata *) sh->hostdata;
pdev = hostdata->pci_dev;
if (pci_read_config_word(pdev, PCI_COMMAND, &command)
|| pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision))
{
printk("qlogicisp : error reading PCI configuration\n");
return 1;
}
io_base = pci_resource_start(pdev, 0);
mem_base = pci_resource_start(pdev, 1);
io_flags = pci_resource_flags(pdev, 0);
mem_flags = pci_resource_flags(pdev, 1);
irq = pdev->irq;
if (pdev->vendor != PCI_VENDOR_ID_QLOGIC) {
printk("qlogicisp : 0x%04x is not QLogic vendor ID\n",
pdev->vendor);
return 1;
}
if (pdev->device != PCI_DEVICE_ID_QLOGIC_ISP1020) {
printk("qlogicisp : 0x%04x does not match ISP1020 device id\n",
pdev->device);
return 1;
}
#ifdef __alpha__
/* Force ALPHA to use bus I/O and not bus MEM.
This is to avoid having to use HAE_MEM registers,
which is broken on some platforms and with SMP. */
command &= ~PCI_COMMAND_MEMORY;
#endif
sh->io_port = io_base;
if (!request_region(sh->io_port, 0xff, "qlogicisp")) {
printk("qlogicisp : i/o region 0x%lx-0x%lx already "
"in use\n",
sh->io_port, sh->io_port + 0xff);
return 1;
}
if ((command & PCI_COMMAND_MEMORY) &&
((mem_flags & 1) == 0)) {
hostdata->memaddr = ioremap(mem_base, PAGE_SIZE);
if (!hostdata->memaddr) {
printk("qlogicisp : i/o remapping failed.\n");
goto out_release;
}
} else {
if (command & PCI_COMMAND_IO && (io_flags & 3) != 1) {
printk("qlogicisp : i/o mapping is disabled\n");
goto out_release;
}
hostdata->memaddr = NULL; /* zero to signify no i/o mapping */
mem_base = 0;
}
if (revision != ISP1020_REV_ID)
printk("qlogicisp : new isp1020 revision ID (%d)\n", revision);
if (isp_inw(sh, PCI_ID_LOW) != PCI_VENDOR_ID_QLOGIC
|| isp_inw(sh, PCI_ID_HIGH) != PCI_DEVICE_ID_QLOGIC_ISP1020)
{
printk("qlogicisp : can't decode %s address space 0x%lx\n",
(io_base ? "I/O" : "MEM"),
(io_base ? io_base : mem_base));
goto out_unmap;
}
hostdata->revision = revision;
sh->irq = irq;
sh->max_id = MAX_TARGETS;
sh->max_lun = MAX_LUNS;
hostdata->res_cpu = pci_alloc_consistent(hostdata->pci_dev,
QSIZE(RES_QUEUE_LEN),
&hostdata->res_dma);
if (hostdata->res_cpu == NULL) {
printk("qlogicisp : can't allocate response queue\n");
goto out_unmap;
}
hostdata->req_cpu = pci_alloc_consistent(hostdata->pci_dev,
QSIZE(QLOGICISP_REQ_QUEUE_LEN),
&hostdata->req_dma);
if (hostdata->req_cpu == NULL) {
pci_free_consistent(hostdata->pci_dev,
QSIZE(RES_QUEUE_LEN),
hostdata->res_cpu,
hostdata->res_dma);
printk("qlogicisp : can't allocate request queue\n");
goto out_unmap;
}
pci_set_master(pdev);
LEAVE("isp1020_init");
return 0;
out_unmap:
iounmap(hostdata->memaddr);
out_release:
release_region(sh->io_port, 0xff);
return 1;
}
#if USE_NVRAM_DEFAULTS
static int isp1020_get_defaults(struct Scsi_Host *host)
{
int i;
u_short value;
struct isp1020_hostdata *hostdata =
(struct isp1020_hostdata *) host->hostdata;
ENTER("isp1020_get_defaults");
if (!isp1020_verify_nvram(host)) {
printk("qlogicisp : nvram checksum failure\n");
printk("qlogicisp : attempting to use default parameters\n");
return isp1020_set_defaults(host);
}
value = isp1020_read_nvram_word(host, 2);
hostdata->host_param.fifo_threshold = (value >> 8) & 0x03;
hostdata->host_param.host_adapter_enable = (value >> 11) & 0x01;
hostdata->host_param.initiator_scsi_id = (value >> 12) & 0x0f;
value = isp1020_read_nvram_word(host, 3);
hostdata->host_param.bus_reset_delay = value & 0xff;
hostdata->host_param.retry_count = value >> 8;
value = isp1020_read_nvram_word(host, 4);
hostdata->host_param.retry_delay = value & 0xff;
hostdata->host_param.async_data_setup_time = (value >> 8) & 0x0f;
hostdata->host_param.req_ack_active_negation = (value >> 12) & 0x01;
hostdata->host_param.data_line_active_negation = (value >> 13) & 0x01;
hostdata->host_param.data_dma_burst_enable = (value >> 14) & 0x01;
hostdata->host_param.command_dma_burst_enable = (value >> 15);
value = isp1020_read_nvram_word(host, 5);
hostdata->host_param.tag_aging = value & 0xff;
value = isp1020_read_nvram_word(host, 6);
hostdata->host_param.selection_timeout = value & 0xffff;
value = isp1020_read_nvram_word(host, 7);
hostdata->host_param.max_queue_depth = value & 0xffff;
#if DEBUG_ISP1020_SETUP
printk("qlogicisp : fifo threshold=%d\n",
hostdata->host_param.fifo_threshold);
printk("qlogicisp : initiator scsi id=%d\n",
hostdata->host_param.initiator_scsi_id);
printk("qlogicisp : bus reset delay=%d\n",
hostdata->host_param.bus_reset_delay);
printk("qlogicisp : retry count=%d\n",
hostdata->host_param.retry_count);
printk("qlogicisp : retry delay=%d\n",
hostdata->host_param.retry_delay);
printk("qlogicisp : async data setup time=%d\n",
hostdata->host_param.async_data_setup_time);
printk("qlogicisp : req/ack active negation=%d\n",
hostdata->host_param.req_ack_active_negation);
printk("qlogicisp : data line active negation=%d\n",
hostdata->host_param.data_line_active_negation);
printk("qlogicisp : data DMA burst enable=%d\n",
hostdata->host_param.data_dma_burst_enable);
printk("qlogicisp : command DMA burst enable=%d\n",
hostdata->host_param.command_dma_burst_enable);
printk("qlogicisp : tag age limit=%d\n",
hostdata->host_param.tag_aging);
printk("qlogicisp : selection timeout limit=%d\n",
hostdata->host_param.selection_timeout);
printk("qlogicisp : max queue depth=%d\n",
hostdata->host_param.max_queue_depth);
#endif /* DEBUG_ISP1020_SETUP */
for (i = 0; i < MAX_TARGETS; i++) {
value = isp1020_read_nvram_word(host, 14 + i * 3);
hostdata->dev_param[i].device_flags = value & 0xff;
hostdata->dev_param[i].execution_throttle = value >> 8;
value = isp1020_read_nvram_word(host, 15 + i * 3);
hostdata->dev_param[i].synchronous_period = value & 0xff;
hostdata->dev_param[i].synchronous_offset = (value >> 8) & 0x0f;
hostdata->dev_param[i].device_enable = (value >> 12) & 0x01;
#if DEBUG_ISP1020_SETUP
printk("qlogicisp : target 0x%02x\n", i);
printk("qlogicisp : device flags=0x%02x\n",
hostdata->dev_param[i].device_flags);
printk("qlogicisp : execution throttle=%d\n",
hostdata->dev_param[i].execution_throttle);
printk("qlogicisp : synchronous period=%d\n",
hostdata->dev_param[i].synchronous_period);
printk("qlogicisp : synchronous offset=%d\n",
hostdata->dev_param[i].synchronous_offset);
printk("qlogicisp : device enable=%d\n",
hostdata->dev_param[i].device_enable);
#endif /* DEBUG_ISP1020_SETUP */
}
LEAVE("isp1020_get_defaults");
return 0;
}
#define ISP1020_NVRAM_LEN 0x40
#define ISP1020_NVRAM_SIG1 0x5349
#define ISP1020_NVRAM_SIG2 0x2050
static int isp1020_verify_nvram(struct Scsi_Host *host)
{
int i;
u_short value;
u_char checksum = 0;
for (i = 0; i < ISP1020_NVRAM_LEN; i++) {
value = isp1020_read_nvram_word(host, i);
switch (i) {
case 0:
if (value != ISP1020_NVRAM_SIG1) return 0;
break;
case 1:
if (value != ISP1020_NVRAM_SIG2) return 0;
break;
case 2:
if ((value & 0xff) != 0x02) return 0;
break;
}
checksum += value & 0xff;
checksum += value >> 8;
}
return (checksum == 0);
}
#define NVRAM_DELAY() udelay(2) /* 2 microsecond delay */
u_short isp1020_read_nvram_word(struct Scsi_Host *host, u_short byte)
{
int i;
u_short value, output, input;
byte &= 0x3f; byte |= 0x0180;
for (i = 8; i >= 0; i--) {
output = ((byte >> i) & 0x1) ? 0x4 : 0x0;
isp_outw(output | 0x2, host, PCI_NVRAM); NVRAM_DELAY();
isp_outw(output | 0x3, host, PCI_NVRAM); NVRAM_DELAY();
isp_outw(output | 0x2, host, PCI_NVRAM); NVRAM_DELAY();
}
for (i = 0xf, value = 0; i >= 0; i--) {
value <<= 1;
isp_outw(0x3, host, PCI_NVRAM); NVRAM_DELAY();
input = isp_inw(host, PCI_NVRAM); NVRAM_DELAY();
isp_outw(0x2, host, PCI_NVRAM); NVRAM_DELAY();
if (input & 0x8) value |= 1;
}
isp_outw(0x0, host, PCI_NVRAM); NVRAM_DELAY();
return value;
}
#endif /* USE_NVRAM_DEFAULTS */
static int isp1020_set_defaults(struct Scsi_Host *host)
{
struct isp1020_hostdata *hostdata =
(struct isp1020_hostdata *) host->hostdata;
int i;
ENTER("isp1020_set_defaults");
hostdata->host_param.fifo_threshold = 2;
hostdata->host_param.host_adapter_enable = 1;
hostdata->host_param.initiator_scsi_id = 7;
hostdata->host_param.bus_reset_delay = 3;
hostdata->host_param.retry_count = 0;
hostdata->host_param.retry_delay = 1;
hostdata->host_param.async_data_setup_time = 6;
hostdata->host_param.req_ack_active_negation = 1;
hostdata->host_param.data_line_active_negation = 1;
hostdata->host_param.data_dma_burst_enable = 1;
hostdata->host_param.command_dma_burst_enable = 1;
hostdata->host_param.tag_aging = 8;
hostdata->host_param.selection_timeout = 250;
hostdata->host_param.max_queue_depth = 256;
for (i = 0; i < MAX_TARGETS; i++) {
hostdata->dev_param[i].device_flags = 0xfd;
hostdata->dev_param[i].execution_throttle = 16;
hostdata->dev_param[i].synchronous_period = 25;
hostdata->dev_param[i].synchronous_offset = 12;
hostdata->dev_param[i].device_enable = 1;
}
LEAVE("isp1020_set_defaults");
return 0;
}
static int isp1020_load_parameters(struct Scsi_Host *host)
{
int i, k;
#ifdef CONFIG_QL_ISP_A64
u_long queue_addr;
u_short param[8];
#else
u_int queue_addr;
u_short param[6];
#endif
u_short isp_cfg1, hwrev;
struct isp1020_hostdata *hostdata =
(struct isp1020_hostdata *) host->hostdata;
ENTER("isp1020_load_parameters");
hwrev = isp_inw(host, ISP_CFG0) & ISP_CFG0_HWMSK;
isp_cfg1 = ISP_CFG1_F64 | ISP_CFG1_BENAB;
if (hwrev == ISP_CFG0_1040A) {
/* Busted fifo, says mjacob. */
isp_cfg1 &= ISP_CFG1_BENAB;
}
isp_outw(isp_inw(host, ISP_CFG1) | isp_cfg1, host, ISP_CFG1);
isp_outw(isp_inw(host, CDMA_CONF) | DMA_CONF_BENAB, host, CDMA_CONF);
isp_outw(isp_inw(host, DDMA_CONF) | DMA_CONF_BENAB, host, DDMA_CONF);
param[0] = MBOX_SET_INIT_SCSI_ID;
param[1] = hostdata->host_param.initiator_scsi_id;
isp1020_mbox_command(host, param);
if (param[0] != MBOX_COMMAND_COMPLETE) {
printk("qlogicisp : set initiator id failure\n");
return 1;
}
param[0] = MBOX_SET_RETRY_COUNT;
param[1] = hostdata->host_param.retry_count;
param[2] = hostdata->host_param.retry_delay;
isp1020_mbox_command(host, param);
if (param[0] != MBOX_COMMAND_COMPLETE) {
printk("qlogicisp : set retry count failure\n");
return 1;
}
param[0] = MBOX_SET_ASYNC_DATA_SETUP_TIME;
param[1] = hostdata->host_param.async_data_setup_time;
isp1020_mbox_command(host, param);
if (param[0] != MBOX_COMMAND_COMPLETE) {
printk("qlogicisp : async data setup time failure\n");
return 1;
}
param[0] = MBOX_SET_ACTIVE_NEG_STATE;
param[1] = (hostdata->host_param.req_ack_active_negation << 4)
| (hostdata->host_param.data_line_active_negation << 5);
isp1020_mbox_command(host, param);
if (param[0] != MBOX_COMMAND_COMPLETE) {
printk("qlogicisp : set active negation state failure\n");
return 1;
}
param[0] = MBOX_SET_PCI_CONTROL_PARAMS;
param[1] = hostdata->host_param.data_dma_burst_enable << 1;
param[2] = hostdata->host_param.command_dma_burst_enable << 1;
isp1020_mbox_command(host, param);
if (param[0] != MBOX_COMMAND_COMPLETE) {
printk("qlogicisp : set pci control parameter failure\n");
return 1;
}
param[0] = MBOX_SET_TAG_AGE_LIMIT;
param[1] = hostdata->host_param.tag_aging;
isp1020_mbox_command(host, param);
if (param[0] != MBOX_COMMAND_COMPLETE) {
printk("qlogicisp : set tag age limit failure\n");
return 1;
}
param[0] = MBOX_SET_SELECT_TIMEOUT;
param[1] = hostdata->host_param.selection_timeout;
isp1020_mbox_command(host, param);
if (param[0] != MBOX_COMMAND_COMPLETE) {
printk("qlogicisp : set selection timeout failure\n");
return 1;
}
for (i = 0; i < MAX_TARGETS; i++) {
if (!hostdata->dev_param[i].device_enable)
continue;
param[0] = MBOX_SET_TARGET_PARAMS;
param[1] = i << 8;
param[2] = hostdata->dev_param[i].device_flags << 8;
param[3] = (hostdata->dev_param[i].synchronous_offset << 8)
| hostdata->dev_param[i].synchronous_period;
isp1020_mbox_command(host, param);
if (param[0] != MBOX_COMMAND_COMPLETE) {
printk("qlogicisp : set target parameter failure\n");
return 1;
}
for (k = 0; k < MAX_LUNS; k++) {
param[0] = MBOX_SET_DEV_QUEUE_PARAMS;
param[1] = (i << 8) | k;
param[2] = hostdata->host_param.max_queue_depth;
param[3] = hostdata->dev_param[i].execution_throttle;
isp1020_mbox_command(host, param);
if (param[0] != MBOX_COMMAND_COMPLETE) {
printk("qlogicisp : set device queue "
"parameter failure\n");
return 1;
}
}
}
queue_addr = hostdata->res_dma;
#ifdef CONFIG_QL_ISP_A64
param[0] = MBOX_CMD_INIT_RESPONSE_QUEUE_64;
#else
param[0] = MBOX_INIT_RES_QUEUE;
#endif
param[1] = RES_QUEUE_LEN + 1;
param[2] = (u_short) (queue_addr >> 16);
param[3] = (u_short) (queue_addr & 0xffff);
param[4] = 0;
param[5] = 0;
#ifdef CONFIG_QL_ISP_A64
param[6] = (u_short) (queue_addr >> 48);
param[7] = (u_short) (queue_addr >> 32);
#endif
isp1020_mbox_command(host, param);
if (param[0] != MBOX_COMMAND_COMPLETE) {
printk("qlogicisp : set response queue failure\n");
return 1;
}
queue_addr = hostdata->req_dma;
#ifdef CONFIG_QL_ISP_A64
param[0] = MBOX_CMD_INIT_REQUEST_QUEUE_64;
#else
param[0] = MBOX_INIT_REQ_QUEUE;
#endif
param[1] = QLOGICISP_REQ_QUEUE_LEN + 1;
param[2] = (u_short) (queue_addr >> 16);
param[3] = (u_short) (queue_addr & 0xffff);
param[4] = 0;
#ifdef CONFIG_QL_ISP_A64
param[5] = 0;
param[6] = (u_short) (queue_addr >> 48);
param[7] = (u_short) (queue_addr >> 32);
#endif
isp1020_mbox_command(host, param);
if (param[0] != MBOX_COMMAND_COMPLETE) {
printk("qlogicisp : set request queue failure\n");
return 1;
}
LEAVE("isp1020_load_parameters");
return 0;
}
/*
* currently, this is only called during initialization or abort/reset,
* at which times interrupts are disabled, so polling is OK, I guess...
*/
static int isp1020_mbox_command(struct Scsi_Host *host, u_short param[])
{
int loop_count;
if (mbox_param[param[0]] == 0)
return 1;
loop_count = DEFAULT_LOOP_COUNT;
while (--loop_count && isp_inw(host, HOST_HCCR) & 0x0080) {
barrier();
cpu_relax();
}
if (!loop_count)
printk("qlogicisp: mbox_command loop timeout #1\n");
switch(mbox_param[param[0]] >> 4) {
case 8: isp_outw(param[7], host, MBOX7);
case 7: isp_outw(param[6], host, MBOX6);
case 6: isp_outw(param[5], host, MBOX5);
case 5: isp_outw(param[4], host, MBOX4);
case 4: isp_outw(param[3], host, MBOX3);
case 3: isp_outw(param[2], host, MBOX2);
case 2: isp_outw(param[1], host, MBOX1);
case 1: isp_outw(param[0], host, MBOX0);
}
isp_outw(0x0, host, PCI_SEMAPHORE);
isp_outw(HCCR_CLEAR_RISC_INTR, host, HOST_HCCR);
isp_outw(HCCR_SET_HOST_INTR, host, HOST_HCCR);
loop_count = DEFAULT_LOOP_COUNT;
while (--loop_count && !(isp_inw(host, PCI_INTF_STS) & 0x04)) {
barrier();
cpu_relax();
}
if (!loop_count)
printk("qlogicisp: mbox_command loop timeout #2\n");
loop_count = DEFAULT_LOOP_COUNT;
while (--loop_count && isp_inw(host, MBOX0) == 0x04) {
barrier();
cpu_relax();
}
if (!loop_count)
printk("qlogicisp: mbox_command loop timeout #3\n");
switch(mbox_param[param[0]] & 0xf) {
case 8: param[7] = isp_inw(host, MBOX7);
case 7: param[6] = isp_inw(host, MBOX6);
case 6: param[5] = isp_inw(host, MBOX5);
case 5: param[4] = isp_inw(host, MBOX4);
case 4: param[3] = isp_inw(host, MBOX3);
case 3: param[2] = isp_inw(host, MBOX2);
case 2: param[1] = isp_inw(host, MBOX1);
case 1: param[0] = isp_inw(host, MBOX0);
}
isp_outw(0x0, host, PCI_SEMAPHORE);
isp_outw(HCCR_CLEAR_RISC_INTR, host, HOST_HCCR);
return 0;
}
#if DEBUG_ISP1020_INTR
void isp1020_print_status_entry(struct Status_Entry *status)
{
int i;
printk("qlogicisp : entry count = 0x%02x, type = 0x%02x, flags = 0x%02x\n",
status->hdr.entry_cnt, status->hdr.entry_type, status->hdr.flags);
printk("qlogicisp : scsi status = 0x%04x, completion status = 0x%04x\n",
le16_to_cpu(status->scsi_status), le16_to_cpu(status->completion_status));
printk("qlogicisp : state flags = 0x%04x, status flags = 0x%04x\n",
le16_to_cpu(status->state_flags), le16_to_cpu(status->status_flags));
printk("qlogicisp : time = 0x%04x, request sense length = 0x%04x\n",
le16_to_cpu(status->time), le16_to_cpu(status->req_sense_len));
printk("qlogicisp : residual transfer length = 0x%08x\n",
le32_to_cpu(status->residual));
for (i = 0; i < le16_to_cpu(status->req_sense_len); i++)
printk("qlogicisp : sense data = 0x%02x\n", status->req_sense_data[i]);
}
#endif /* DEBUG_ISP1020_INTR */
#if DEBUG_ISP1020
void isp1020_print_scsi_cmd(Scsi_Cmnd *cmd)
{
int i;
printk("qlogicisp : target = 0x%02x, lun = 0x%02x, cmd_len = 0x%02x\n",
cmd->target, cmd->lun, cmd->cmd_len);
printk("qlogicisp : command = ");
for (i = 0; i < cmd->cmd_len; i++)
printk("0x%02x ", cmd->cmnd[i]);
printk("\n");
}
#endif /* DEBUG_ISP1020 */
MODULE_LICENSE("GPL");
static Scsi_Host_Template driver_template = {
.detect = isp1020_detect,
.release = isp1020_release,
.info = isp1020_info,
.queuecommand = isp1020_queuecommand,
.bios_param = isp1020_biosparam,
.can_queue = QLOGICISP_REQ_QUEUE_LEN,
.this_id = -1,
.sg_tablesize = QLOGICISP_MAX_SG(QLOGICISP_REQ_QUEUE_LEN),
.cmd_per_lun = 1,
.use_clustering = DISABLE_CLUSTERING,
};
#include "scsi_module.c"
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