kernel-ark/drivers/scsi/sata_uli.c
Jeff Garzik aa8f0dc6c3 libata: Fix use-after-iounmap
Jens Axboe pointed out that the iounmap() call in libata was occurring
too early, and some drivers (ahci, probably others) were using ioremap'd
memory after it had been unmapped.

The patch should address that problem by way of improving the libata
driver API:

* move ->host_stop() call after all ->port_stop() calls have occurred.

* create default helper function ata_host_stop(), and move iounmap()
call there.

* add ->host_stop_prewalk() hook, use it in sata_qstor.c (hi Mark).
sata_qstor appears to require the host-stop-before-port-stop ordering
that existed prior to applying the attached patch.
2005-05-26 21:54:27 -04:00

289 lines
7.7 KiB
C

/*
* sata_uli.c - ULi Electronics SATA
*
* The contents of this file are subject to the Open
* Software License version 1.1 that can be found at
* http://www.opensource.org/licenses/osl-1.1.txt and is included herein
* by reference.
*
* Alternatively, the contents of this file may be used under the terms
* of the GNU General Public License version 2 (the "GPL") as distributed
* in the kernel source COPYING file, in which case the provisions of
* the GPL are applicable instead of the above. If you wish to allow
* the use of your version of this file only under the terms of the
* GPL and not to allow others to use your version of this file under
* the OSL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the GPL.
* If you do not delete the provisions above, a recipient may use your
* version of this file under either the OSL or the GPL.
*
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include "scsi.h"
#include <scsi/scsi_host.h>
#include <linux/libata.h>
#define DRV_NAME "sata_uli"
#define DRV_VERSION "0.5"
enum {
uli_5289 = 0,
uli_5287 = 1,
uli_5281 = 2,
/* PCI configuration registers */
ULI5287_BASE = 0x90, /* sata0 phy SCR registers */
ULI5287_OFFS = 0x10, /* offset from sata0->sata1 phy regs */
ULI5281_BASE = 0x60, /* sata0 phy SCR registers */
ULI5281_OFFS = 0x60, /* offset from sata0->sata1 phy regs */
};
static int uli_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
static u32 uli_scr_read (struct ata_port *ap, unsigned int sc_reg);
static void uli_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
static struct pci_device_id uli_pci_tbl[] = {
{ PCI_VENDOR_ID_AL, 0x5289, PCI_ANY_ID, PCI_ANY_ID, 0, 0, uli_5289 },
{ PCI_VENDOR_ID_AL, 0x5287, PCI_ANY_ID, PCI_ANY_ID, 0, 0, uli_5287 },
{ PCI_VENDOR_ID_AL, 0x5281, PCI_ANY_ID, PCI_ANY_ID, 0, 0, uli_5281 },
{ } /* terminate list */
};
static struct pci_driver uli_pci_driver = {
.name = DRV_NAME,
.id_table = uli_pci_tbl,
.probe = uli_init_one,
.remove = ata_pci_remove_one,
};
static Scsi_Host_Template uli_sht = {
.module = THIS_MODULE,
.name = DRV_NAME,
.ioctl = ata_scsi_ioctl,
.queuecommand = ata_scsi_queuecmd,
.eh_strategy_handler = ata_scsi_error,
.can_queue = ATA_DEF_QUEUE,
.this_id = ATA_SHT_THIS_ID,
.sg_tablesize = LIBATA_MAX_PRD,
.max_sectors = ATA_MAX_SECTORS,
.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
.emulated = ATA_SHT_EMULATED,
.use_clustering = ATA_SHT_USE_CLUSTERING,
.proc_name = DRV_NAME,
.dma_boundary = ATA_DMA_BOUNDARY,
.slave_configure = ata_scsi_slave_config,
.bios_param = ata_std_bios_param,
.ordered_flush = 1,
};
static struct ata_port_operations uli_ops = {
.port_disable = ata_port_disable,
.tf_load = ata_tf_load,
.tf_read = ata_tf_read,
.check_status = ata_check_status,
.exec_command = ata_exec_command,
.dev_select = ata_std_dev_select,
.phy_reset = sata_phy_reset,
.bmdma_setup = ata_bmdma_setup,
.bmdma_start = ata_bmdma_start,
.bmdma_stop = ata_bmdma_stop,
.bmdma_status = ata_bmdma_status,
.qc_prep = ata_qc_prep,
.qc_issue = ata_qc_issue_prot,
.eng_timeout = ata_eng_timeout,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.scr_read = uli_scr_read,
.scr_write = uli_scr_write,
.port_start = ata_port_start,
.port_stop = ata_port_stop,
.host_stop = ata_host_stop,
};
static struct ata_port_info uli_port_info = {
.sht = &uli_sht,
.host_flags = ATA_FLAG_SATA | ATA_FLAG_SATA_RESET |
ATA_FLAG_NO_LEGACY,
.pio_mask = 0x03, //support pio mode 4 (FIXME)
.udma_mask = 0x7f, //support udma mode 6
.port_ops = &uli_ops,
};
MODULE_AUTHOR("Peer Chen");
MODULE_DESCRIPTION("low-level driver for ULi Electronics SATA controller");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, uli_pci_tbl);
MODULE_VERSION(DRV_VERSION);
static unsigned int get_scr_cfg_addr(struct ata_port *ap, unsigned int sc_reg)
{
return ap->ioaddr.scr_addr + (4 * sc_reg);
}
static u32 uli_scr_cfg_read (struct ata_port *ap, unsigned int sc_reg)
{
struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
unsigned int cfg_addr = get_scr_cfg_addr(ap, sc_reg);
u32 val;
pci_read_config_dword(pdev, cfg_addr, &val);
return val;
}
static void uli_scr_cfg_write (struct ata_port *ap, unsigned int scr, u32 val)
{
struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
unsigned int cfg_addr = get_scr_cfg_addr(ap, scr);
pci_write_config_dword(pdev, cfg_addr, val);
}
static u32 uli_scr_read (struct ata_port *ap, unsigned int sc_reg)
{
if (sc_reg > SCR_CONTROL)
return 0xffffffffU;
return uli_scr_cfg_read(ap, sc_reg);
}
static void uli_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
{
if (sc_reg > SCR_CONTROL) //SCR_CONTROL=2, SCR_ERROR=1, SCR_STATUS=0
return;
uli_scr_cfg_write(ap, sc_reg, val);
}
/* move to PCI layer, integrate w/ MSI stuff */
static void pci_enable_intx(struct pci_dev *pdev)
{
u16 pci_command;
pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
if (pci_command & PCI_COMMAND_INTX_DISABLE) {
pci_command &= ~PCI_COMMAND_INTX_DISABLE;
pci_write_config_word(pdev, PCI_COMMAND, pci_command);
}
}
static int uli_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct ata_probe_ent *probe_ent;
struct ata_port_info *ppi;
int rc;
unsigned int board_idx = (unsigned int) ent->driver_data;
int pci_dev_busy = 0;
rc = pci_enable_device(pdev);
if (rc)
return rc;
rc = pci_request_regions(pdev, DRV_NAME);
if (rc) {
pci_dev_busy = 1;
goto err_out;
}
rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
if (rc)
goto err_out_regions;
rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
if (rc)
goto err_out_regions;
ppi = &uli_port_info;
probe_ent = ata_pci_init_native_mode(pdev, &ppi);
if (!probe_ent) {
rc = -ENOMEM;
goto err_out_regions;
}
switch (board_idx) {
case uli_5287:
probe_ent->port[0].scr_addr = ULI5287_BASE;
probe_ent->port[1].scr_addr = ULI5287_BASE + ULI5287_OFFS;
probe_ent->n_ports = 4;
probe_ent->port[2].cmd_addr = pci_resource_start(pdev, 0) + 8;
probe_ent->port[2].altstatus_addr =
probe_ent->port[2].ctl_addr =
(pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS) + 4;
probe_ent->port[2].bmdma_addr = pci_resource_start(pdev, 4) + 16;
probe_ent->port[2].scr_addr = ULI5287_BASE + ULI5287_OFFS*4;
probe_ent->port[3].cmd_addr = pci_resource_start(pdev, 2) + 8;
probe_ent->port[3].altstatus_addr =
probe_ent->port[3].ctl_addr =
(pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS) + 4;
probe_ent->port[3].bmdma_addr = pci_resource_start(pdev, 4) + 24;
probe_ent->port[3].scr_addr = ULI5287_BASE + ULI5287_OFFS*5;
ata_std_ports(&probe_ent->port[2]);
ata_std_ports(&probe_ent->port[3]);
break;
case uli_5289:
probe_ent->port[0].scr_addr = ULI5287_BASE;
probe_ent->port[1].scr_addr = ULI5287_BASE + ULI5287_OFFS;
break;
case uli_5281:
probe_ent->port[0].scr_addr = ULI5281_BASE;
probe_ent->port[1].scr_addr = ULI5281_BASE + ULI5281_OFFS;
break;
default:
BUG();
break;
}
pci_set_master(pdev);
pci_enable_intx(pdev);
/* FIXME: check ata_device_add return value */
ata_device_add(probe_ent);
kfree(probe_ent);
return 0;
err_out_regions:
pci_release_regions(pdev);
err_out:
if (!pci_dev_busy)
pci_disable_device(pdev);
return rc;
}
static int __init uli_init(void)
{
return pci_module_init(&uli_pci_driver);
}
static void __exit uli_exit(void)
{
pci_unregister_driver(&uli_pci_driver);
}
module_init(uli_init);
module_exit(uli_exit);