From f814b75f4ed2ed58cd7bc876a0a9406f984aac6d Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Sat, 5 Aug 2006 03:59:13 +0900 Subject: [PATCH] ata_piix: fix host_set private_data intialization To get host_set->private_data initialized reliably, all pinfos need to point to the same hpriv. Restore pinfo->private_data after pata pinfo assignment. Signed-off-by: Tejun Heo --- drivers/scsi/ata_piix.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/scsi/ata_piix.c') diff --git a/drivers/scsi/ata_piix.c b/drivers/scsi/ata_piix.c index 19745a31072b..298e4643b969 100644 --- a/drivers/scsi/ata_piix.c +++ b/drivers/scsi/ata_piix.c @@ -828,6 +828,7 @@ static void __devinit piix_init_sata_map(struct pci_dev *pdev, case IDE: WARN_ON((i & 1) || map[i + 1] != IDE); pinfo[i / 2] = piix_port_info[ich5_pata]; + pinfo[i / 2].private_data = hpriv; i++; printk(" IDE IDE"); break; -- cgit v1.2.1 From 85455dd34219376dcc7dce94bea67058f0b7d731 Mon Sep 17 00:00:00 2001 From: Keith Owens Date: Tue, 8 Aug 2006 13:51:02 +1000 Subject: [PATCH] Fix compile problem when sata debugging is on Fix a sata debug print statement that still uses an old variable name. Signed-off-by: Keith Owens Signed-off-by: Jeff Garzik --- drivers/scsi/ata_piix.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/scsi/ata_piix.c') diff --git a/drivers/scsi/ata_piix.c b/drivers/scsi/ata_piix.c index 298e4643b969..5e8afc876980 100644 --- a/drivers/scsi/ata_piix.c +++ b/drivers/scsi/ata_piix.c @@ -567,8 +567,8 @@ static int piix_sata_prereset(struct ata_port *ap) present = 1; } - DPRINTK("ata%u: LEAVE, pcs=0x%x present_mask=0x%x\n", - ap->id, pcs, present_mask); + DPRINTK("ata%u: LEAVE, pcs=0x%x present=0x%x\n", + ap->id, pcs, present); if (!present) { ata_port_printk(ap, KERN_INFO, "SATA port has no device.\n"); -- cgit v1.2.1 From f1a58ecae527fc67c87ce4dcb9e73894f64aadfe Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Sun, 20 Aug 2006 17:56:38 +0900 Subject: [PATCH] ata_piix: fix ghost device probing by honoring PCS present bits Move out PCS handling from piix_sata_prereset() into piix_sata_present_mask() and use it from newly implemented piix_sata_softreset(). Class codes for devices which are indicated to be absent by PCS are cleared to ATA_DEV_NONE. This fixes ghost device problem reported on ICH6 and 7. This patch moves PCS handling from prereset to softreset, which makes two behavior changes. * perform softreset even when PCS indicates no device * PCS handling is repeated before retrying softresets due to reset failures. Both behavior changes are intended and more consistent with how other drivers behave. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- drivers/scsi/ata_piix.c | 60 +++++++++++++++++++++++++++++++++++-------------- 1 file changed, 43 insertions(+), 17 deletions(-) (limited to 'drivers/scsi/ata_piix.c') diff --git a/drivers/scsi/ata_piix.c b/drivers/scsi/ata_piix.c index 5e8afc876980..01b3530cf6df 100644 --- a/drivers/scsi/ata_piix.c +++ b/drivers/scsi/ata_piix.c @@ -531,27 +531,25 @@ static void piix_pata_error_handler(struct ata_port *ap) } /** - * piix_sata_prereset - prereset for SATA host controller + * piix_sata_present_mask - determine present mask for SATA host controller * @ap: Target port * - * Reads and configures SATA PCI device's PCI config register - * Port Configuration and Status (PCS) to determine port and - * device availability. Return -ENODEV to skip reset if no - * device is present. + * Reads SATA PCI device's PCI config register Port Configuration + * and Status (PCS) to determine port and device availability. * * LOCKING: * None (inherited from caller). * * RETURNS: - * 0 if device is present, -ENODEV otherwise. + * determined present_mask */ -static int piix_sata_prereset(struct ata_port *ap) +static unsigned int piix_sata_present_mask(struct ata_port *ap) { struct pci_dev *pdev = to_pci_dev(ap->host_set->dev); struct piix_host_priv *hpriv = ap->host_set->private_data; const unsigned int *map = hpriv->map; int base = 2 * ap->hard_port_no; - unsigned int present = 0; + unsigned int present_mask = 0; int port, i; u16 pcs; @@ -564,24 +562,52 @@ static int piix_sata_prereset(struct ata_port *ap) continue; if ((ap->flags & PIIX_FLAG_IGNORE_PCS) || (pcs & 1 << (hpriv->map_db->present_shift + port))) - present = 1; + present_mask |= 1 << i; } - DPRINTK("ata%u: LEAVE, pcs=0x%x present=0x%x\n", - ap->id, pcs, present); + DPRINTK("ata%u: LEAVE, pcs=0x%x present_mask=0x%x\n", + ap->id, pcs, present_mask); - if (!present) { - ata_port_printk(ap, KERN_INFO, "SATA port has no device.\n"); - ap->eh_context.i.action &= ~ATA_EH_RESET_MASK; - return 0; + return present_mask; +} + +/** + * piix_sata_softreset - reset SATA host port via ATA SRST + * @ap: port to reset + * @classes: resulting classes of attached devices + * + * Reset SATA host port via ATA SRST. On controllers with + * reliable PCS present bits, the bits are used to determine + * device presence. + * + * LOCKING: + * Kernel thread context (may sleep) + * + * RETURNS: + * 0 on success, -errno otherwise. + */ +static int piix_sata_softreset(struct ata_port *ap, unsigned int *classes) +{ + unsigned int present_mask; + int i, rc; + + present_mask = piix_sata_present_mask(ap); + + rc = ata_std_softreset(ap, classes); + if (rc) + return rc; + + for (i = 0; i < ATA_MAX_DEVICES; i++) { + if (!(present_mask & (1 << i))) + classes[i] = ATA_DEV_NONE; } - return ata_std_prereset(ap); + return 0; } static void piix_sata_error_handler(struct ata_port *ap) { - ata_bmdma_drive_eh(ap, piix_sata_prereset, ata_std_softreset, NULL, + ata_bmdma_drive_eh(ap, ata_std_prereset, piix_sata_softreset, NULL, ata_std_postreset); } -- cgit v1.2.1 From f3745a3f9fa39fa3c62f7d5b8549ee787d2c6848 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 22 Aug 2006 21:06:46 +0900 Subject: [PATCH] ata_piix: ignore PCS on ICH5 There have been a number of reports regarding some ICH5s failing to detect devices since the PCS handling update. Analysis shows that these problems are caused by bogus PCS values from those controllers. Before the PCS update, the driver didn't honor PCS regs exactly and probed them in many cases PCS reports no device. Now that PCS is honored exactly, these hardware problems are visible. This patch makes ICH5 ignore PCS. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- drivers/scsi/ata_piix.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/scsi/ata_piix.c') diff --git a/drivers/scsi/ata_piix.c b/drivers/scsi/ata_piix.c index 01b3530cf6df..3b98f1813356 100644 --- a/drivers/scsi/ata_piix.c +++ b/drivers/scsi/ata_piix.c @@ -390,7 +390,8 @@ static struct ata_port_info piix_port_info[] = { /* ich5_sata */ { .sht = &piix_sht, - .host_flags = ATA_FLAG_SATA | PIIX_FLAG_CHECKINTR, + .host_flags = ATA_FLAG_SATA | PIIX_FLAG_CHECKINTR | + PIIX_FLAG_IGNORE_PCS, .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = 0x7f, /* udma0-6 */ -- cgit v1.2.1 From 9dd9c16465c82d1385f97d2a245641464fcb7894 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 22 Aug 2006 21:15:58 +0900 Subject: [PATCH] ata_piix: implement force_pcs module parameter This patch implements force_pcs module parameter for ata_piix. If 1, PCS is ignored, 2 honored. As there seem to be quite a few ICHs w/ impaired PCS, this option will be useful for cases where the default setting doesn't work. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- drivers/scsi/ata_piix.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) (limited to 'drivers/scsi/ata_piix.c') diff --git a/drivers/scsi/ata_piix.c b/drivers/scsi/ata_piix.c index 3b98f1813356..2d20caf377f5 100644 --- a/drivers/scsi/ata_piix.c +++ b/drivers/scsi/ata_piix.c @@ -468,6 +468,11 @@ MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, piix_pci_tbl); MODULE_VERSION(DRV_VERSION); +static int force_pcs = 0; +module_param(force_pcs, int, 0444); +MODULE_PARM_DESC(force_pcs, "force honoring or ignoring PCS to work around " + "device mis-detection (0=default, 1=ignore PCS, 2=honor PCS)"); + /** * piix_pata_cbl_detect - Probe host controller cable detect info * @ap: Port for which cable detect info is desired @@ -812,6 +817,7 @@ static int __devinit piix_check_450nx_errata(struct pci_dev *ata_dev) } static void __devinit piix_init_pcs(struct pci_dev *pdev, + struct ata_port_info *pinfo, const struct piix_map_db *map_db) { u16 pcs, new_pcs; @@ -825,6 +831,18 @@ static void __devinit piix_init_pcs(struct pci_dev *pdev, pci_write_config_word(pdev, ICH5_PCS, new_pcs); msleep(150); } + + if (force_pcs == 1) { + dev_printk(KERN_INFO, &pdev->dev, + "force ignoring PCS (0x%x)\n", new_pcs); + pinfo[0].host_flags |= PIIX_FLAG_IGNORE_PCS; + pinfo[1].host_flags |= PIIX_FLAG_IGNORE_PCS; + } else if (force_pcs == 2) { + dev_printk(KERN_INFO, &pdev->dev, + "force honoring PCS (0x%x)\n", new_pcs); + pinfo[0].host_flags &= ~PIIX_FLAG_IGNORE_PCS; + pinfo[1].host_flags &= ~PIIX_FLAG_IGNORE_PCS; + } } static void __devinit piix_init_sata_map(struct pci_dev *pdev, @@ -933,7 +951,8 @@ static int piix_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) if (host_flags & ATA_FLAG_SATA) { piix_init_sata_map(pdev, port_info, piix_map_db_table[ent->driver_data]); - piix_init_pcs(pdev, piix_map_db_table[ent->driver_data]); + piix_init_pcs(pdev, port_info, + piix_map_db_table[ent->driver_data]); } /* On ICH5, some BIOSen disable the interrupt using the -- cgit v1.2.1