There has been a whole series of patches to sata_nv to deal with broken "hardreset" behaviour. The following patch wraps up all of these since 2.6.26.
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 858f706..6cda12b 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -305,12 +305,12 @@ static void nv_ck804_host_stop(struct ata_host *host);
static int nv_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
static int nv_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
+static int nv_noclassify_hardreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline);
static void nv_nf2_freeze(struct ata_port *ap);
static void nv_nf2_thaw(struct ata_port *ap);
static void nv_ck804_freeze(struct ata_port *ap);
static void nv_ck804_thaw(struct ata_port *ap);
-static int nv_hardreset(struct ata_link *link, unsigned int *class,
- unsigned long deadline);
static int nv_adma_slave_config(struct scsi_device *sdev);
static int nv_adma_check_atapi_dma(struct ata_queued_cmd *qc);
static void nv_adma_qc_prep(struct ata_queued_cmd *qc);
@@ -352,6 +352,7 @@ enum nv_host_type
NFORCE3 = NFORCE2, /* NF2 == NF3 as far as sata_nv is concerned */
CK804,
ADMA,
+ MCP5x,
SWNCQ,
};
@@ -363,10 +364,10 @@ static const struct pci_device_id nv_pci_tbl[] = {
{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_SATA2), CK804 },
{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_SATA), CK804 },
{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_SATA2), CK804 },
- { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA), SWNCQ },
- { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA2), SWNCQ },
- { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA), SWNCQ },
- { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA2), SWNCQ },
+ { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA), MCP5x },
+ { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA2), MCP5x },
+ { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA), MCP5x },
+ { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA2), MCP5x },
{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA), GENERIC
},
{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA2), GENERIC
},
{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA3), GENERIC
},
@@ -405,28 +406,54 @@ static struct scsi_host_template nv_swncq_sht = {
.slave_configure = nv_swncq_slave_config,
};
-static struct ata_port_operations nv_generic_ops = {
+static struct ata_port_operations nv_common_ops = {
.inherits = &ata_bmdma_port_ops,
- .hardreset = nv_hardreset,
+ .lost_interrupt = ATA_OP_NULL,
.scr_read = nv_scr_read,
.scr_write = nv_scr_write,
};
+/* OSDL bz11195 reports that link doesn't come online after hardreset
+ * on generic nv's and there have been several other similar reports
+ * on linux-ide. Disable hardreset for generic nv's.
+ */
+static struct ata_port_operations nv_generic_ops = {
+ .inherits = &nv_common_ops,
+ .hardreset = ATA_OP_NULL,
+};
+
+/* nf2 is ripe with hardreset related problems.
+ *
+ * kernel bz#3352 reports nf2/3 controllers can't determine device
+ * signature reliably. The following thread reports detection failure
+ * on cold boot with the standard debouncing timing.
+ *
+ * http://thread.gmane.org/gmane.linux.ide/34098
+ *
+ * And bz#12176 reports that hardreset simply doesn't work on nf2.
+ * Give up on it and just don't do hardreset.
+ */
static struct ata_port_operations nv_nf2_ops = {
.inherits = &nv_generic_ops,
.freeze = nv_nf2_freeze,
.thaw = nv_nf2_thaw,
};
+/* For initial probing after boot and hot plugging, hardreset mostly
+ * works fine on CK804 but curiously, reprobing on the initial port by
+ * rescanning or rmmod/insmod fails to acquire the initial D2H Reg FIS
+ * in somewhat undeterministic way. Use noclassify hardreset.
+ */
static struct ata_port_operations nv_ck804_ops = {
- .inherits = &nv_generic_ops,
+ .inherits = &nv_common_ops,
.freeze = nv_ck804_freeze,
.thaw = nv_ck804_thaw,
+ .hardreset = nv_noclassify_hardreset,
.host_stop = nv_ck804_host_stop,
};
static struct ata_port_operations nv_adma_ops = {
- .inherits = &nv_generic_ops,
+ .inherits = &nv_ck804_ops,
.check_atapi_dma = nv_adma_check_atapi_dma,
.sff_tf_read = nv_adma_tf_read,
@@ -449,8 +476,19 @@ static struct ata_port_operations nv_adma_ops = {
.host_stop = nv_adma_host_stop,
};
+/* Kernel bz#12351 reports that when SWNCQ is enabled, for hotplug to
+ * work, hardreset should be used and hardreset can't report proper
+ * signature, which suggests that mcp5x is closer to nf2 as long as
+ * reset quirkiness is concerned. Define separate ops for mcp5x with
+ * nv_noclassify_hardreset().
+ */
+static struct ata_port_operations nv_mcp5x_ops = {
+ .inherits = &nv_common_ops,
+ .hardreset = nv_noclassify_hardreset,
+};
+
static struct ata_port_operations nv_swncq_ops = {
- .inherits = &nv_generic_ops,
+ .inherits = &nv_mcp5x_ops,
.qc_defer = ata_std_qc_defer,
.qc_prep = nv_swncq_qc_prep,
@@ -513,6 +551,15 @@ static const struct ata_port_info nv_port_info[] = {
.port_ops = &nv_adma_ops,
.private_data = NV_PI_PRIV(nv_adma_interrupt, &nv_adma_sht),
},
+ /* MCP5x */
+ {
+ .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
+ .pio_mask = NV_PIO_MASK,
+ .mwdma_mask = NV_MWDMA_MASK,
+ .udma_mask = NV_UDMA_MASK,
+ .port_ops = &nv_mcp5x_ops,
+ .private_data = NV_PI_PRIV(nv_generic_interrupt, &nv_sht),
+ },
/* SWNCQ */
{
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
@@ -1512,6 +1559,17 @@ static irqreturn_t nv_ck804_interrupt(int irq, void
*dev_instance)
return 0;
}
+static int nv_noclassify_hardreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline)
+{
+ bool online;
+ int rc;
+
+ rc = sata_link_hardreset(link, sata_deb_timing_hotplug, deadline,
+ &online, NULL);
+ return online ? -EAGAIN : rc;
+}
+
static void nv_nf2_freeze(struct ata_port *ap)
{
void __iomem *scr_addr = ap->host->ports[0]->ioaddr.scr_addr;
@@ -1588,21 +1646,6 @@ static void nv_mcp55_thaw(struct ata_port *ap)
ata_sff_thaw(ap);
}
-static int nv_hardreset(struct ata_link *link, unsigned int *class,
- unsigned long deadline)
-{
- int rc;
-
- /* SATA hardreset fails to retrieve proper device signature on
- * some controllers. Request follow up SRST. For more info,
- * see http://bugzilla.kernel.org/show_bug.cgi?id=3352
- */
- rc = sata_sff_hardreset(link, class, deadline);
- if (rc)
- return rc;
- return -EAGAIN;
-}
-
static void nv_adma_error_handler(struct ata_port *ap)
{
struct nv_adma_port_priv *pp = ap->private_data;
@@ -2341,14 +2384,9 @@ static int nv_init_one(struct pci_dev *pdev, const
struct pci_device_id *ent)
if (type == CK804 && adma_enabled) {
dev_printk(KERN_NOTICE, &pdev->dev, "Using ADMA mode\n");
type = ADMA;
- }
-
- if (type == SWNCQ) {
- if (swncq_enabled)
- dev_printk(KERN_NOTICE, &pdev->dev,
- "Using SWNCQ mode\n");
- else
- type = GENERIC;
+ } else if (type == MCP5x && swncq_enabled) {
+ dev_printk(KERN_NOTICE, &pdev->dev, "Using SWNCQ mode\n");
+ type = SWNCQ;
}
ppi[0] = &nv_port_info[type];
--- END ---
Ben.
--
Ben Hutchings
Logic doesn't apply to the real world. - Marvin Minsky
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