[IA64-SGI]
Missed the "bk new" for this file in the last commit. Signed-off-by: Bruce Losure <blosure@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Bruce Losure
Tony Luck
parent
c1298c5c7e
commit
ff3eb55ed9
1 changed files with 548 additions and 0 deletions
548
arch/ia64/sn/kernel/tiocx.c
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548
arch/ia64/sn/kernel/tiocx.c
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (c) 2005 Silicon Graphics, Inc. All rights reserved.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/version.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/proc_fs.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <asm/uaccess.h>
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#include <asm/sn/sn_sal.h>
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#include <asm/sn/addrs.h>
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#include <asm/sn/io.h>
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#include <asm/sn/types.h>
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#include <asm/sn/shubio.h>
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#include <asm/sn/tiocx.h>
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#include "tio.h"
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#include "xtalk/xwidgetdev.h"
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#include "xtalk/hubdev.h"
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#define CX_DEV_NONE 0
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#define DEVICE_NAME "tiocx"
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#define WIDGET_ID 0
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#define TIOCX_DEBUG 0
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#if TIOCX_DEBUG
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#define DBG(fmt...) printk(KERN_ALERT fmt)
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#else
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#define DBG(fmt...)
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#endif
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struct device_attribute dev_attr_cxdev_control;
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/**
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* tiocx_match - Try to match driver id list with device.
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* @dev: device pointer
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* @drv: driver pointer
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*
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* Returns 1 if match, 0 otherwise.
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*/
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static int tiocx_match(struct device *dev, struct device_driver *drv)
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{
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struct cx_dev *cx_dev = to_cx_dev(dev);
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struct cx_drv *cx_drv = to_cx_driver(drv);
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const struct cx_device_id *ids = cx_drv->id_table;
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if (!ids)
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return 0;
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while (ids->part_num) {
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if (ids->part_num == cx_dev->cx_id.part_num)
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return 1;
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ids++;
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}
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return 0;
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}
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static int tiocx_hotplug(struct device *dev, char **envp, int num_envp,
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char *buffer, int buffer_size)
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{
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return -ENODEV;
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}
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static void tiocx_bus_release(struct device *dev)
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{
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kfree(to_cx_dev(dev));
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}
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struct bus_type tiocx_bus_type = {
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.name = "tiocx",
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.match = tiocx_match,
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.hotplug = tiocx_hotplug,
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};
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/**
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* cx_device_match - Find cx_device in the id table.
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* @ids: id table from driver
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* @cx_device: part/mfg id for the device
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*
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*/
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static const struct cx_device_id *cx_device_match(const struct cx_device_id
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*ids,
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struct cx_dev *cx_device)
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{
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/*
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* NOTES: We may want to check for CX_ANY_ID too.
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* Do we want to match against nasid too?
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* CX_DEV_NONE == 0, if the driver tries to register for
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* part/mfg == 0 we should return no-match (NULL) here.
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*/
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while (ids->part_num && ids->mfg_num) {
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if (ids->part_num == cx_device->cx_id.part_num &&
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ids->mfg_num == cx_device->cx_id.mfg_num)
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return ids;
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ids++;
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}
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return NULL;
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}
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/**
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* cx_device_probe - Look for matching device.
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* Call driver probe routine if found.
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* @cx_driver: driver table (cx_drv struct) from driver
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* @cx_device: part/mfg id for the device
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*/
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static int cx_device_probe(struct device *dev)
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{
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const struct cx_device_id *id;
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struct cx_drv *cx_drv = to_cx_driver(dev->driver);
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struct cx_dev *cx_dev = to_cx_dev(dev);
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int error = 0;
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if (!cx_dev->driver && cx_drv->probe) {
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id = cx_device_match(cx_drv->id_table, cx_dev);
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if (id) {
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if ((error = cx_drv->probe(cx_dev, id)) < 0)
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return error;
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else
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cx_dev->driver = cx_drv;
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}
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}
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return error;
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}
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/**
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* cx_driver_remove - Remove driver from device struct.
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* @dev: device
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*/
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static int cx_driver_remove(struct device *dev)
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{
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struct cx_dev *cx_dev = to_cx_dev(dev);
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struct cx_drv *cx_drv = cx_dev->driver;
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if (cx_drv->remove)
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cx_drv->remove(cx_dev);
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cx_dev->driver = NULL;
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return 0;
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}
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/**
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* cx_driver_register - Register the driver.
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* @cx_driver: driver table (cx_drv struct) from driver
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*
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* Called from the driver init routine to register a driver.
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* The cx_drv struct contains the driver name, a pointer to
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* a table of part/mfg numbers and a pointer to the driver's
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* probe/attach routine.
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*/
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int cx_driver_register(struct cx_drv *cx_driver)
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{
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cx_driver->driver.name = cx_driver->name;
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cx_driver->driver.bus = &tiocx_bus_type;
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cx_driver->driver.probe = cx_device_probe;
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cx_driver->driver.remove = cx_driver_remove;
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return driver_register(&cx_driver->driver);
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}
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/**
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* cx_driver_unregister - Unregister the driver.
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* @cx_driver: driver table (cx_drv struct) from driver
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*/
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int cx_driver_unregister(struct cx_drv *cx_driver)
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{
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driver_unregister(&cx_driver->driver);
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return 0;
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}
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/**
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* cx_device_register - Register a device.
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* @nasid: device's nasid
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* @part_num: device's part number
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* @mfg_num: device's manufacturer number
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* @hubdev: hub info associated with this device
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*
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*/
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int
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cx_device_register(nasid_t nasid, int part_num, int mfg_num,
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struct hubdev_info *hubdev)
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{
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struct cx_dev *cx_dev;
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cx_dev = kcalloc(1, sizeof(struct cx_dev), GFP_KERNEL);
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DBG("cx_dev= 0x%p\n", cx_dev);
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if (cx_dev == NULL)
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return -ENOMEM;
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cx_dev->cx_id.part_num = part_num;
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cx_dev->cx_id.mfg_num = mfg_num;
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cx_dev->cx_id.nasid = nasid;
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cx_dev->hubdev = hubdev;
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cx_dev->dev.parent = NULL;
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cx_dev->dev.bus = &tiocx_bus_type;
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cx_dev->dev.release = tiocx_bus_release;
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snprintf(cx_dev->dev.bus_id, BUS_ID_SIZE, "%d.0x%x",
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cx_dev->cx_id.nasid, cx_dev->cx_id.part_num);
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device_register(&cx_dev->dev);
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get_device(&cx_dev->dev);
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device_create_file(&cx_dev->dev, &dev_attr_cxdev_control);
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return 0;
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}
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/**
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* cx_device_unregister - Unregister a device.
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* @cx_dev: part/mfg id for the device
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*/
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int cx_device_unregister(struct cx_dev *cx_dev)
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{
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put_device(&cx_dev->dev);
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device_unregister(&cx_dev->dev);
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return 0;
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}
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/**
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* cx_device_reload - Reload the device.
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* @nasid: device's nasid
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* @part_num: device's part number
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* @mfg_num: device's manufacturer number
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*
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* Remove the device associated with 'nasid' from device list and then
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* call device-register with the given part/mfg numbers.
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*/
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static int cx_device_reload(struct cx_dev *cx_dev)
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{
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device_remove_file(&cx_dev->dev, &dev_attr_cxdev_control);
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cx_device_unregister(cx_dev);
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return cx_device_register(cx_dev->cx_id.nasid, cx_dev->cx_id.part_num,
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cx_dev->cx_id.mfg_num, cx_dev->hubdev);
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}
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static inline uint64_t tiocx_intr_alloc(nasid_t nasid, int widget,
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u64 sn_irq_info,
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int req_irq, nasid_t req_nasid,
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int req_slice)
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{
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struct ia64_sal_retval rv;
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rv.status = 0;
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rv.v0 = 0;
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ia64_sal_oemcall_nolock(&rv, SN_SAL_IOIF_INTERRUPT,
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SAL_INTR_ALLOC, nasid,
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widget, sn_irq_info, req_irq,
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req_nasid, req_slice);
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return rv.status;
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}
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static inline void tiocx_intr_free(nasid_t nasid, int widget,
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struct sn_irq_info *sn_irq_info)
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{
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struct ia64_sal_retval rv;
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rv.status = 0;
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rv.v0 = 0;
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ia64_sal_oemcall_nolock(&rv, SN_SAL_IOIF_INTERRUPT,
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SAL_INTR_FREE, nasid,
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widget, sn_irq_info->irq_irq,
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sn_irq_info->irq_cookie, 0, 0);
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}
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struct sn_irq_info *tiocx_irq_alloc(nasid_t nasid, int widget, int irq,
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nasid_t req_nasid, int slice)
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{
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struct sn_irq_info *sn_irq_info;
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int status;
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int sn_irq_size = sizeof(struct sn_irq_info);
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if ((nasid & 1) == 0)
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return NULL;
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sn_irq_info = kmalloc(sn_irq_size, GFP_KERNEL);
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if (sn_irq_info == NULL)
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return NULL;
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memset(sn_irq_info, 0x0, sn_irq_size);
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status = tiocx_intr_alloc(nasid, widget, __pa(sn_irq_info), irq,
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req_nasid, slice);
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if (status) {
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kfree(sn_irq_info);
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return NULL;
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} else {
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return sn_irq_info;
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}
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}
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void tiocx_irq_free(struct sn_irq_info *sn_irq_info)
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{
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uint64_t bridge = (uint64_t) sn_irq_info->irq_bridge;
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nasid_t nasid = NASID_GET(bridge);
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int widget;
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if (nasid & 1) {
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widget = TIO_SWIN_WIDGETNUM(bridge);
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tiocx_intr_free(nasid, widget, sn_irq_info);
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kfree(sn_irq_info);
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}
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}
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uint64_t
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tiocx_dma_addr(uint64_t addr)
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{
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return PHYS_TO_TIODMA(addr);
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}
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uint64_t
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tiocx_swin_base(int nasid)
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{
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return TIO_SWIN_BASE(nasid, TIOCX_CORELET);
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}
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EXPORT_SYMBOL(cx_driver_register);
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EXPORT_SYMBOL(cx_driver_unregister);
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EXPORT_SYMBOL(cx_device_register);
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EXPORT_SYMBOL(cx_device_unregister);
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EXPORT_SYMBOL(tiocx_irq_alloc);
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EXPORT_SYMBOL(tiocx_irq_free);
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EXPORT_SYMBOL(tiocx_bus_type);
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EXPORT_SYMBOL(tiocx_dma_addr);
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EXPORT_SYMBOL(tiocx_swin_base);
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static uint64_t tiocx_get_hubdev_info(u64 handle, u64 address)
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{
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struct ia64_sal_retval ret_stuff;
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ret_stuff.status = 0;
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ret_stuff.v0 = 0;
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ia64_sal_oemcall_nolock(&ret_stuff,
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SN_SAL_IOIF_GET_HUBDEV_INFO,
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handle, address, 0, 0, 0, 0, 0);
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return ret_stuff.v0;
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}
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static void tio_conveyor_set(nasid_t nasid, int enable_flag)
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{
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uint64_t ice_frz;
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uint64_t disable_cb = (1ull << 61);
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if (!(nasid & 1))
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return;
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ice_frz = REMOTE_HUB_L(nasid, TIO_ICE_FRZ_CFG);
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if (enable_flag) {
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if (!(ice_frz & disable_cb)) /* already enabled */
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return;
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ice_frz &= ~disable_cb;
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} else {
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if (ice_frz & disable_cb) /* already disabled */
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return;
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ice_frz |= disable_cb;
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}
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DBG(KERN_ALERT "TIO_ICE_FRZ_CFG= 0x%lx\n", ice_frz);
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REMOTE_HUB_S(nasid, TIO_ICE_FRZ_CFG, ice_frz);
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}
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#define tio_conveyor_enable(nasid) tio_conveyor_set(nasid, 1)
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#define tio_conveyor_disable(nasid) tio_conveyor_set(nasid, 0)
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static void tio_corelet_reset(nasid_t nasid, int corelet)
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{
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if (!(nasid & 1))
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return;
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REMOTE_HUB_S(nasid, TIO_ICE_PMI_TX_CFG, 1 << corelet);
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udelay(2000);
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REMOTE_HUB_S(nasid, TIO_ICE_PMI_TX_CFG, 0);
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udelay(2000);
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}
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static int fpga_attached(nasid_t nasid)
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{
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uint64_t cx_credits;
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cx_credits = REMOTE_HUB_L(nasid, TIO_ICE_PMI_TX_DYN_CREDIT_STAT_CB3);
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cx_credits &= TIO_ICE_PMI_TX_DYN_CREDIT_STAT_CB3_CREDIT_CNT_MASK;
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DBG("cx_credits= 0x%lx\n", cx_credits);
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return (cx_credits == 0xf) ? 1 : 0;
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}
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static int tiocx_reload(struct cx_dev *cx_dev)
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{
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int part_num = CX_DEV_NONE;
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int mfg_num = CX_DEV_NONE;
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nasid_t nasid = cx_dev->cx_id.nasid;
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if (fpga_attached(nasid)) {
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uint64_t cx_id;
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cx_id =
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*(volatile int32_t *)(TIO_SWIN_BASE(nasid, TIOCX_CORELET) +
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WIDGET_ID);
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part_num = XWIDGET_PART_NUM(cx_id);
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mfg_num = XWIDGET_MFG_NUM(cx_id);
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DBG("part= 0x%x, mfg= 0x%x\n", part_num, mfg_num);
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/* just ignore it if it's a CE */
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if (part_num == TIO_CE_ASIC_PARTNUM)
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return 0;
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}
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cx_dev->cx_id.part_num = part_num;
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cx_dev->cx_id.mfg_num = mfg_num;
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/*
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* Delete old device and register the new one. It's ok if
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* part_num/mfg_num == CX_DEV_NONE. We want to register
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* devices in the table even if a bitstream isn't loaded.
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* That allows use to see that a bitstream isn't loaded via
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* TIOCX_IOCTL_DEV_LIST.
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*/
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return cx_device_reload(cx_dev);
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}
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static ssize_t show_cxdev_control(struct device *dev, char *buf)
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{
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struct cx_dev *cx_dev = to_cx_dev(dev);
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return sprintf(buf, "0x%x 0x%x 0x%x\n",
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cx_dev->cx_id.nasid,
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cx_dev->cx_id.part_num, cx_dev->cx_id.mfg_num);
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}
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static ssize_t store_cxdev_control(struct device *dev, const char *buf,
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size_t count)
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{
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int n;
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struct cx_dev *cx_dev = to_cx_dev(dev);
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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if (count <= 0)
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return 0;
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n = simple_strtoul(buf, NULL, 0);
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switch (n) {
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case 1:
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tiocx_reload(cx_dev);
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break;
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case 3:
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tio_corelet_reset(cx_dev->cx_id.nasid, TIOCX_CORELET);
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break;
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default:
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break;
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}
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return count;
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}
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DEVICE_ATTR(cxdev_control, 0644, show_cxdev_control, store_cxdev_control);
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static int __init tiocx_init(void)
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{
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cnodeid_t cnodeid;
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int found_tiocx_device = 0;
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bus_register(&tiocx_bus_type);
|
||||
|
||||
for (cnodeid = 0; cnodeid < MAX_COMPACT_NODES; cnodeid++) {
|
||||
nasid_t nasid;
|
||||
|
||||
if ((nasid = cnodeid_to_nasid(cnodeid)) < 0)
|
||||
break; /* No more nasids .. bail out of loop */
|
||||
|
||||
if (nasid & 0x1) { /* TIO's are always odd */
|
||||
struct hubdev_info *hubdev;
|
||||
uint64_t status;
|
||||
struct xwidget_info *widgetp;
|
||||
|
||||
DBG("Found TIO at nasid 0x%x\n", nasid);
|
||||
|
||||
hubdev =
|
||||
(struct hubdev_info *)(NODEPDA(cnodeid)->pdinfo);
|
||||
status =
|
||||
tiocx_get_hubdev_info(nasid,
|
||||
(uint64_t) __pa(hubdev));
|
||||
if (status)
|
||||
continue;
|
||||
|
||||
widgetp = &hubdev->hdi_xwidget_info[TIOCX_CORELET];
|
||||
|
||||
/* The CE hangs off of the CX port but is not an FPGA */
|
||||
if (widgetp->xwi_hwid.part_num == TIO_CE_ASIC_PARTNUM)
|
||||
continue;
|
||||
|
||||
tio_corelet_reset(nasid, TIOCX_CORELET);
|
||||
tio_conveyor_enable(nasid);
|
||||
|
||||
if (cx_device_register
|
||||
(nasid, widgetp->xwi_hwid.part_num,
|
||||
widgetp->xwi_hwid.mfg_num, hubdev) < 0)
|
||||
return -ENXIO;
|
||||
else
|
||||
found_tiocx_device++;
|
||||
}
|
||||
}
|
||||
|
||||
/* It's ok if we find zero devices. */
|
||||
DBG("found_tiocx_device= %d\n", found_tiocx_device);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit tiocx_exit(void)
|
||||
{
|
||||
struct device *dev;
|
||||
struct device *tdev;
|
||||
|
||||
DBG("tiocx_exit\n");
|
||||
|
||||
/*
|
||||
* Unregister devices.
|
||||
*/
|
||||
list_for_each_entry_safe(dev, tdev, &tiocx_bus_type.devices.list,
|
||||
bus_list) {
|
||||
if (dev) {
|
||||
struct cx_dev *cx_dev = to_cx_dev(dev);
|
||||
device_remove_file(dev, &dev_attr_cxdev_control);
|
||||
cx_device_unregister(cx_dev);
|
||||
}
|
||||
}
|
||||
|
||||
bus_unregister(&tiocx_bus_type);
|
||||
}
|
||||
|
||||
module_init(tiocx_init);
|
||||
module_exit(tiocx_exit);
|
||||
|
||||
/************************************************************************
|
||||
* Module licensing and description
|
||||
************************************************************************/
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("Bruce Losure <blosure@sgi.com>");
|
||||
MODULE_DESCRIPTION("TIOCX module");
|
||||
MODULE_SUPPORTED_DEVICE(DEVICE_NAME);
|
||||
Loading…
Reference in a new issue