mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 22:46:40 +07:00
ecc1241e80
Since
commit 43cc71eed1
Author: Kay Sievers <kay.sievers@vrfy.org>
Date: Sat Aug 18 04:40:39 2007 +0200
platform: prefix MODALIAS with "platform:"
the platform modalias is prefixed with "platform:". Add MODULE_ALIAS()
to the hotpluggable SCSI platform drivers, to re-enable auto loading.
[dbrownell@users.sourceforge.net: more drivers, registration fixes]
[akpm@linux-foundation.org: fix sgiwd93.c]
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
338 lines
8.1 KiB
C
338 lines
8.1 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
|
|
* Copyright (C) 1999 Andrew R. Baker (andrewb@uab.edu)
|
|
* Copyright (C) 2001 Florian Lohoff (flo@rfc822.org)
|
|
* Copyright (C) 2003, 07 Ralf Baechle (ralf@linux-mips.org)
|
|
*
|
|
* (In all truth, Jed Schimmel wrote all this code.)
|
|
*/
|
|
|
|
#undef DEBUG
|
|
|
|
#include <linux/delay.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/gfp.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
#include <asm/sgi/hpc3.h>
|
|
#include <asm/sgi/ip22.h>
|
|
#include <asm/sgi/wd.h>
|
|
|
|
#include "scsi.h"
|
|
#include "wd33c93.h"
|
|
|
|
struct ip22_hostdata {
|
|
struct WD33C93_hostdata wh;
|
|
dma_addr_t dma;
|
|
void *cpu;
|
|
struct device *dev;
|
|
};
|
|
|
|
#define host_to_hostdata(host) ((struct ip22_hostdata *)((host)->hostdata))
|
|
|
|
struct hpc_chunk {
|
|
struct hpc_dma_desc desc;
|
|
u32 _padding; /* align to quadword boundary */
|
|
};
|
|
|
|
/* space for hpc dma descriptors */
|
|
#define HPC_DMA_SIZE PAGE_SIZE
|
|
|
|
#define DMA_DIR(d) ((d == DATA_OUT_DIR) ? DMA_TO_DEVICE : DMA_FROM_DEVICE)
|
|
|
|
static irqreturn_t sgiwd93_intr(int irq, void *dev_id)
|
|
{
|
|
struct Scsi_Host * host = dev_id;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(host->host_lock, flags);
|
|
wd33c93_intr(host);
|
|
spin_unlock_irqrestore(host->host_lock, flags);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static inline
|
|
void fill_hpc_entries(struct ip22_hostdata *hd, struct scsi_cmnd *cmd, int din)
|
|
{
|
|
unsigned long len = cmd->SCp.this_residual;
|
|
void *addr = cmd->SCp.ptr;
|
|
dma_addr_t physaddr;
|
|
unsigned long count;
|
|
struct hpc_chunk *hcp;
|
|
|
|
physaddr = dma_map_single(hd->dev, addr, len, DMA_DIR(din));
|
|
cmd->SCp.dma_handle = physaddr;
|
|
hcp = hd->cpu;
|
|
|
|
while (len) {
|
|
/*
|
|
* even cntinfo could be up to 16383, without
|
|
* magic only 8192 works correctly
|
|
*/
|
|
count = len > 8192 ? 8192 : len;
|
|
hcp->desc.pbuf = physaddr;
|
|
hcp->desc.cntinfo = count;
|
|
hcp++;
|
|
len -= count;
|
|
physaddr += count;
|
|
}
|
|
|
|
/*
|
|
* To make sure, if we trip an HPC bug, that we transfer every single
|
|
* byte, we tag on an extra zero length dma descriptor at the end of
|
|
* the chain.
|
|
*/
|
|
hcp->desc.pbuf = 0;
|
|
hcp->desc.cntinfo = HPCDMA_EOX;
|
|
dma_cache_sync(hd->dev, hd->cpu,
|
|
(unsigned long)(hcp + 1) - (unsigned long)hd->cpu,
|
|
DMA_TO_DEVICE);
|
|
}
|
|
|
|
static int dma_setup(struct scsi_cmnd *cmd, int datainp)
|
|
{
|
|
struct ip22_hostdata *hdata = host_to_hostdata(cmd->device->host);
|
|
struct hpc3_scsiregs *hregs =
|
|
(struct hpc3_scsiregs *) cmd->device->host->base;
|
|
|
|
pr_debug("dma_setup: datainp<%d> hcp<%p> ", datainp, hdata->cpu);
|
|
|
|
hdata->wh.dma_dir = datainp;
|
|
|
|
/*
|
|
* wd33c93 shouldn't pass us bogus dma_setups, but it does:-( The
|
|
* other wd33c93 drivers deal with it the same way (which isn't that
|
|
* obvious). IMHO a better fix would be, not to do these dma setups
|
|
* in the first place.
|
|
*/
|
|
if (cmd->SCp.ptr == NULL || cmd->SCp.this_residual == 0)
|
|
return 1;
|
|
|
|
fill_hpc_entries(hdata, cmd, datainp);
|
|
|
|
pr_debug(" HPCGO\n");
|
|
|
|
/* Start up the HPC. */
|
|
hregs->ndptr = hdata->dma;
|
|
if (datainp)
|
|
hregs->ctrl = HPC3_SCTRL_ACTIVE;
|
|
else
|
|
hregs->ctrl = HPC3_SCTRL_ACTIVE | HPC3_SCTRL_DIR;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
|
|
int status)
|
|
{
|
|
struct ip22_hostdata *hdata = host_to_hostdata(instance);
|
|
struct hpc3_scsiregs *hregs;
|
|
|
|
if (!SCpnt)
|
|
return;
|
|
|
|
if (SCpnt->SCp.ptr == NULL || SCpnt->SCp.this_residual == 0)
|
|
return;
|
|
|
|
hregs = (struct hpc3_scsiregs *) SCpnt->device->host->base;
|
|
|
|
pr_debug("dma_stop: status<%d> ", status);
|
|
|
|
/* First stop the HPC and flush it's FIFO. */
|
|
if (hdata->wh.dma_dir) {
|
|
hregs->ctrl |= HPC3_SCTRL_FLUSH;
|
|
while (hregs->ctrl & HPC3_SCTRL_ACTIVE)
|
|
barrier();
|
|
}
|
|
hregs->ctrl = 0;
|
|
dma_unmap_single(hdata->dev, SCpnt->SCp.dma_handle,
|
|
SCpnt->SCp.this_residual,
|
|
DMA_DIR(hdata->wh.dma_dir));
|
|
|
|
pr_debug("\n");
|
|
}
|
|
|
|
void sgiwd93_reset(unsigned long base)
|
|
{
|
|
struct hpc3_scsiregs *hregs = (struct hpc3_scsiregs *) base;
|
|
|
|
hregs->ctrl = HPC3_SCTRL_CRESET;
|
|
udelay(50);
|
|
hregs->ctrl = 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sgiwd93_reset);
|
|
|
|
static inline void init_hpc_chain(struct ip22_hostdata *hdata)
|
|
{
|
|
struct hpc_chunk *hcp = (struct hpc_chunk *)hdata->cpu;
|
|
dma_addr_t dma = hdata->dma;
|
|
unsigned long start, end;
|
|
|
|
start = (unsigned long) hcp;
|
|
end = start + HPC_DMA_SIZE;
|
|
while (start < end) {
|
|
hcp->desc.pnext = (u32) (dma + sizeof(struct hpc_chunk));
|
|
hcp->desc.cntinfo = HPCDMA_EOX;
|
|
hcp++;
|
|
dma += sizeof(struct hpc_chunk);
|
|
start += sizeof(struct hpc_chunk);
|
|
};
|
|
hcp--;
|
|
hcp->desc.pnext = hdata->dma;
|
|
}
|
|
|
|
static int sgiwd93_bus_reset(struct scsi_cmnd *cmd)
|
|
{
|
|
/* FIXME perform bus-specific reset */
|
|
|
|
/* FIXME 2: kill this function, and let midlayer fallback
|
|
to the same result, calling wd33c93_host_reset() */
|
|
|
|
spin_lock_irq(cmd->device->host->host_lock);
|
|
wd33c93_host_reset(cmd);
|
|
spin_unlock_irq(cmd->device->host->host_lock);
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* Kludge alert - the SCSI code calls the abort and reset method with int
|
|
* arguments not with pointers. So this is going to blow up beautyfully
|
|
* on 64-bit systems with memory outside the compat address spaces.
|
|
*/
|
|
static struct scsi_host_template sgiwd93_template = {
|
|
.module = THIS_MODULE,
|
|
.proc_name = "SGIWD93",
|
|
.name = "SGI WD93",
|
|
.queuecommand = wd33c93_queuecommand,
|
|
.eh_abort_handler = wd33c93_abort,
|
|
.eh_bus_reset_handler = sgiwd93_bus_reset,
|
|
.eh_host_reset_handler = wd33c93_host_reset,
|
|
.can_queue = 16,
|
|
.this_id = 7,
|
|
.sg_tablesize = SG_ALL,
|
|
.cmd_per_lun = 8,
|
|
.use_clustering = DISABLE_CLUSTERING,
|
|
};
|
|
|
|
static int __init sgiwd93_probe(struct platform_device *pdev)
|
|
{
|
|
struct sgiwd93_platform_data *pd = pdev->dev.platform_data;
|
|
unsigned char *wdregs = pd->wdregs;
|
|
struct hpc3_scsiregs *hregs = pd->hregs;
|
|
struct ip22_hostdata *hdata;
|
|
struct Scsi_Host *host;
|
|
wd33c93_regs regs;
|
|
unsigned int unit = pd->unit;
|
|
unsigned int irq = pd->irq;
|
|
int err;
|
|
|
|
host = scsi_host_alloc(&sgiwd93_template, sizeof(struct ip22_hostdata));
|
|
if (!host) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
host->base = (unsigned long) hregs;
|
|
host->irq = irq;
|
|
|
|
hdata = host_to_hostdata(host);
|
|
hdata->dev = &pdev->dev;
|
|
hdata->cpu = dma_alloc_noncoherent(&pdev->dev, HPC_DMA_SIZE,
|
|
&hdata->dma, GFP_KERNEL);
|
|
if (!hdata->cpu) {
|
|
printk(KERN_WARNING "sgiwd93: Could not allocate memory for "
|
|
"host %d buffer.\n", unit);
|
|
err = -ENOMEM;
|
|
goto out_put;
|
|
}
|
|
|
|
init_hpc_chain(hdata);
|
|
|
|
regs.SASR = wdregs + 3;
|
|
regs.SCMD = wdregs + 7;
|
|
|
|
hdata->wh.no_sync = 0;
|
|
hdata->wh.fast = 1;
|
|
hdata->wh.dma_mode = CTRL_BURST;
|
|
|
|
wd33c93_init(host, regs, dma_setup, dma_stop, WD33C93_FS_MHZ(20));
|
|
|
|
err = request_irq(irq, sgiwd93_intr, 0, "SGI WD93", host);
|
|
if (err) {
|
|
printk(KERN_WARNING "sgiwd93: Could not register irq %d "
|
|
"for host %d.\n", irq, unit);
|
|
goto out_free;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, host);
|
|
|
|
err = scsi_add_host(host, NULL);
|
|
if (err)
|
|
goto out_irq;
|
|
|
|
scsi_scan_host(host);
|
|
|
|
return 0;
|
|
|
|
out_irq:
|
|
free_irq(irq, host);
|
|
out_free:
|
|
dma_free_noncoherent(&pdev->dev, HPC_DMA_SIZE, hdata->cpu, hdata->dma);
|
|
out_put:
|
|
scsi_host_put(host);
|
|
out:
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __exit sgiwd93_remove(struct platform_device *pdev)
|
|
{
|
|
struct Scsi_Host *host = platform_get_drvdata(pdev);
|
|
struct ip22_hostdata *hdata = (struct ip22_hostdata *) host->hostdata;
|
|
struct sgiwd93_platform_data *pd = pdev->dev.platform_data;
|
|
|
|
scsi_remove_host(host);
|
|
free_irq(pd->irq, host);
|
|
dma_free_noncoherent(&pdev->dev, HPC_DMA_SIZE, hdata->cpu, hdata->dma);
|
|
scsi_host_put(host);
|
|
}
|
|
|
|
static struct platform_driver sgiwd93_driver = {
|
|
.probe = sgiwd93_probe,
|
|
.remove = __devexit_p(sgiwd93_remove),
|
|
.driver = {
|
|
.name = "sgiwd93",
|
|
.owner = THIS_MODULE,
|
|
}
|
|
};
|
|
|
|
static int __init sgiwd93_module_init(void)
|
|
{
|
|
return platform_driver_register(&sgiwd93_driver);
|
|
}
|
|
|
|
static void __exit sgiwd93_module_exit(void)
|
|
{
|
|
return platform_driver_unregister(&sgiwd93_driver);
|
|
}
|
|
|
|
module_init(sgiwd93_module_init);
|
|
module_exit(sgiwd93_module_exit);
|
|
|
|
MODULE_DESCRIPTION("SGI WD33C93 driver");
|
|
MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:sgiwd93");
|