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Subject[PATCH,RFT] VIA SATA driver update

A lot of cleanups, though the main functional changes are that the
driver now uses the generic SATA phy probe/reset code.

Tested on a VIA-based MSI motherboard, running a 64-bit Athlon64 kernel.

I'm interested in hearing reports if libata's VIA SATA still fails for
you...

IMPORTANT NOTE: If your kernel's default configuration does not work
for you, you may need one or more of the following kernel command line
options:
noapic
iommu=off
acpi=off

(I didn't need any of these options, but some users might)

Patch for 2.6.5-rc1-bk:
attached

Patch for 2.4.25 (included in libata-for-24 bundle):
http://www.kernel.org/pub/linux/kernel/people/jgarzik/libata/2.4.25-libata8.patch.bz2

BK repositories:
http://gkernel.bkbits.net/libata-2.4
http://gkernel.bkbits.net/libata-2.5

diff -Nru a/drivers/scsi/sata_via.c b/drivers/scsi/sata_via.c
--- a/drivers/scsi/sata_via.c Wed Mar 17 05:13:24 2004
+++ b/drivers/scsi/sata_via.c Wed Mar 17 05:13:24 2004
@@ -22,7 +22,6 @@

*/

-#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
@@ -32,19 +31,31 @@
#include "scsi.h"
#include "hosts.h"
#include <linux/libata.h>
+#include <asm/io.h>

#define DRV_NAME "sata_via"
-#define DRV_VERSION "0.11"
+#define DRV_VERSION "0.20"

enum {
via_sata = 0,
+
+ SATA_CHAN_ENAB = 0x40,
+ SATA_INT_GATE = 0x41,
+ SATA_NATIVE_MODE = 0x42,
+
+ PORT0 = (1 << 1), /* yes, port0 is bit 1 */
+ PORT1 = (1 << 0), /* yes, port1 is bit 0 */
+
+ ENAB_ALL = PORT0 | PORT1,
+
+ INT_GATE_ALL = PORT0 | PORT1,
+
+ NATIVE_MODE_ALL = (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4),
};

static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
-static void svia_sata_phy_reset(struct ata_port *ap);
-static void svia_port_disable(struct ata_port *ap);
-
-static unsigned int in_module_init = 1;
+static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg);
+static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);

static struct pci_device_id svia_pci_tbl[] = {
{ 0x1106, 0x3149, PCI_ANY_ID, PCI_ANY_ID, 0, 0, via_sata },
@@ -78,14 +89,14 @@
};

static struct ata_port_operations svia_sata_ops = {
- .port_disable = svia_port_disable,
+ .port_disable = ata_port_disable,

.tf_load = ata_tf_load_pio,
.tf_read = ata_tf_read_pio,
.check_status = ata_check_status_pio,
.exec_command = ata_exec_command_pio,

- .phy_reset = svia_sata_phy_reset,
+ .phy_reset = sata_phy_reset,
.phy_config = pata_phy_config, /* not a typo */

.bmdma_start = ata_bmdma_start_pio,
@@ -94,70 +105,45 @@

.irq_handler = ata_interrupt,

+ .scr_read = svia_scr_read,
+ .scr_write = svia_scr_write,
+
.port_start = ata_port_start,
.port_stop = ata_port_stop,
};

-static struct ata_port_info svia_port_info[] = {
- /* via_sata */
- {
- .sht = &svia_sht,
- .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY
- | ATA_FLAG_SRST,
- .pio_mask = 0x03, /* pio3-4 */
- .udma_mask = 0x7f, /* udma0-6 ; FIXME */
- .port_ops = &svia_sata_ops,
- },
-};
-
-static struct pci_bits svia_enable_bits[] = {
- { 0x40U, 1U, 0x02UL, 0x02UL }, /* port 0 */
- { 0x40U, 1U, 0x01UL, 0x01UL }, /* port 1 */
-};
-
-
MODULE_AUTHOR("Jeff Garzik");
MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, svia_pci_tbl);

-/**
- * svia_sata_phy_reset -
- * @ap:
- *
- * LOCKING:
- *
- */
-
-static void svia_sata_phy_reset(struct ata_port *ap)
+static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg)
{
- if (!pci_test_config_bits(ap->host_set->pdev,
- &svia_enable_bits[ap->port_no])) {
- ata_port_disable(ap);
- printk(KERN_INFO "ata%u: port disabled. ignoring.\n", ap->id);
- return;
- }
+ if (sc_reg > SCR_CONTROL)
+ return 0xffffffffU;
+ return inl(ap->ioaddr.scr_addr + (4 * sc_reg));
+}

- ata_port_probe(ap);
- if (ap->flags & ATA_FLAG_PORT_DISABLED)
+static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
+{
+ if (sc_reg > SCR_CONTROL)
return;
-
- ata_bus_reset(ap);
+ outl(val, ap->ioaddr.scr_addr + (4 * sc_reg));
}

-/**
- * svia_port_disable -
- * @ap:
- *
- * LOCKING:
- *
- */
+static const unsigned int svia_bar_sizes[] = {
+ 8, 4, 8, 4, 16, 256
+};

-static void svia_port_disable(struct ata_port *ap)
+static unsigned long svia_scr_addr(unsigned long addr, unsigned int port)
{
- ata_port_disable(ap);
+ if (port >= 4)
+ return 0; /* invalid port */

- /* FIXME */
+ addr &= ~((1 << 7) | (1 << 6));
+ addr |= ((unsigned long)port << 6);
+
+ return addr;
}

/**
@@ -174,19 +160,124 @@
static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
{
static int printed_version;
- struct ata_port_info *port_info[1];
- unsigned int n_ports = 1;
+ unsigned int i;
+ int rc;
+ struct ata_probe_ent *probe_ent;
+ u8 tmp8;

if (!printed_version++)
printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");

- /* no hotplugging support (FIXME) */
- if (!in_module_init)
- return -ENODEV;
+ rc = pci_enable_device(pdev);
+ if (rc)
+ return rc;
+
+ rc = pci_request_regions(pdev, DRV_NAME);
+ if (rc)
+ goto err_out;
+
+
+ for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
+ if ((pci_resource_start(pdev, i) == 0) ||
+ (pci_resource_len(pdev, i) < svia_bar_sizes[i])) {
+ printk(KERN_ERR DRV_NAME "(%s): invalid PCI BAR %u (sz 0x%lx, val 0x%lx)\n",
+ pci_name(pdev), i,
+ pci_resource_start(pdev, i),
+ pci_resource_len(pdev, i));
+ rc = -ENODEV;
+ goto err_out_regions;
+ }
+
+ rc = pci_set_dma_mask(pdev, 0xffffffffULL);
+ if (rc)
+ goto err_out_regions;
+ rc = pci_set_consistent_dma_mask(pdev, 0xffffffffULL);
+ if (rc)
+ goto err_out_regions;
+
+ probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
+ if (!probe_ent) {
+ printk(KERN_ERR DRV_NAME "(%s): out of memory\n",
+ pci_name(pdev));
+ rc = -ENOMEM;
+ goto err_out_regions;
+ }
+ memset(probe_ent, 0, sizeof(*probe_ent));
+ INIT_LIST_HEAD(&probe_ent->node);
+ probe_ent->pdev = pdev;
+ probe_ent->sht = &svia_sht;
+ probe_ent->host_flags = ATA_FLAG_SATA | ATA_FLAG_SATA_RESET |
+ ATA_FLAG_NO_LEGACY;
+ probe_ent->port_ops = &svia_sata_ops;
+ probe_ent->n_ports = 2;
+ probe_ent->irq = pdev->irq;
+ probe_ent->irq_flags = SA_SHIRQ;
+ probe_ent->pio_mask = 0x1f;
+ probe_ent->udma_mask = 0x7f;
+
+ probe_ent->port[0].cmd_addr = pci_resource_start(pdev, 0);
+ ata_std_ports(&probe_ent->port[0]);
+ probe_ent->port[0].altstatus_addr =
+ probe_ent->port[0].ctl_addr =
+ pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS;
+ probe_ent->port[0].bmdma_addr = pci_resource_start(pdev, 4);
+ probe_ent->port[0].scr_addr =
+ svia_scr_addr(pci_resource_start(pdev, 5), 0);
+
+ probe_ent->port[1].cmd_addr = pci_resource_start(pdev, 2);
+ ata_std_ports(&probe_ent->port[1]);
+ probe_ent->port[1].altstatus_addr =
+ probe_ent->port[1].ctl_addr =
+ pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS;
+ probe_ent->port[1].bmdma_addr = pci_resource_start(pdev, 4) + 8;
+ probe_ent->port[1].scr_addr =
+ svia_scr_addr(pci_resource_start(pdev, 5), 1);
+
+ pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
+ printk(KERN_INFO DRV_NAME "(%s): routed to hard irq line %d\n",
+ pci_name(pdev),
+ (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);
+
+ /* make sure SATA channels are enabled */
+ pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
+ if ((tmp8 & ENAB_ALL) != ENAB_ALL) {
+ printk(KERN_DEBUG DRV_NAME "(%s): enabling SATA channels (0x%x)\n",
+ pci_name(pdev), (int) tmp8);
+ tmp8 |= ENAB_ALL;
+ pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
+ }
+
+ /* make sure interrupts for each channel sent to us */
+ pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
+ if ((tmp8 & INT_GATE_ALL) != INT_GATE_ALL) {
+ printk(KERN_DEBUG DRV_NAME "(%s): enabling SATA channel interrupts (0x%x)\n",
+ pci_name(pdev), (int) tmp8);
+ tmp8 |= INT_GATE_ALL;
+ pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
+ }
+
+ /* make sure native mode is enabled */
+ pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
+ if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
+ printk(KERN_DEBUG DRV_NAME "(%s): enabling SATA channel native mode (0x%x)\n",
+ pci_name(pdev), (int) tmp8);
+ tmp8 |= NATIVE_MODE_ALL;
+ pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
+ }

- port_info[0] = &svia_port_info[ent->driver_data];
+ pci_set_master(pdev);
+
+ /* FIXME: check ata_device_add return value */
+ ata_device_add(probe_ent);
+ kfree(probe_ent);
+
+ return 0;

- return ata_pci_init_one(pdev, port_info, n_ports);
+err_out_regions:
+ pci_release_regions(pdev);
+err_out:
+ pci_disable_device(pdev);
+ return rc;
}

/**
@@ -200,17 +291,7 @@

static int __init svia_init(void)
{
- int rc;
-
- DPRINTK("pci_module_init\n");
- rc = pci_module_init(&svia_pci_driver);
- if (rc)
- return rc;
-
- in_module_init = 0;
-
- DPRINTK("done\n");
- return 0;
+ return pci_module_init(&svia_pci_driver);
}

/**
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