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authorShaohua Li <shaohua.li@intel.com>2009-07-27 09:24:35 +0800
committerJeff Garzik <jgarzik@redhat.com>2009-09-01 19:47:19 -0400
commit388539f3ff0cf1de926b03f94e1eec112358f74d (patch)
tree6840b76ede7e27e27eb9aaf516f827beba16c5ad /drivers/ata
parent2fc37adba0fb05760b8635c6706773af828ccf3c (diff)
[libata] add DMA setup FIS auto-activate feature
Hopefully results in fewer on-the-wire FIS's and no breakage. We'll see! Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/ahci.c2
-rw-r--r--drivers/ata/libata-core.c36
2 files changed, 30 insertions, 8 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index fe3eba5d6b3e..7a3124a9abc6 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -2869,7 +2869,7 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
/* prepare host */
if (hpriv->cap & HOST_CAP_NCQ)
- pi.flags |= ATA_FLAG_NCQ;
+ pi.flags |= ATA_FLAG_NCQ | ATA_FLAG_FPDMA_AA;
if (hpriv->cap & HOST_CAP_PMP)
pi.flags |= ATA_FLAG_PMP;
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 072ba5ea138f..98af50f16e0c 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2299,29 +2299,49 @@ static inline u8 ata_dev_knobble(struct ata_device *dev)
return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
}
-static void ata_dev_config_ncq(struct ata_device *dev,
+static int ata_dev_config_ncq(struct ata_device *dev,
char *desc, size_t desc_sz)
{
struct ata_port *ap = dev->link->ap;
int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
+ unsigned int err_mask;
+ char *aa_desc = "";
if (!ata_id_has_ncq(dev->id)) {
desc[0] = '\0';
- return;
+ return 0;
}
if (dev->horkage & ATA_HORKAGE_NONCQ) {
snprintf(desc, desc_sz, "NCQ (not used)");
- return;
+ return 0;
}
if (ap->flags & ATA_FLAG_NCQ) {
hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
dev->flags |= ATA_DFLAG_NCQ;
}
+ if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
+ (ap->flags & ATA_FLAG_FPDMA_AA) &&
+ ata_id_has_fpdma_aa(dev->id)) {
+ err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
+ SATA_FPDMA_AA);
+ if (err_mask) {
+ ata_dev_printk(dev, KERN_ERR, "failed to enable AA"
+ "(error_mask=0x%x)\n", err_mask);
+ if (err_mask != AC_ERR_DEV) {
+ dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
+ return -EIO;
+ }
+ } else
+ aa_desc = ", AA";
+ }
+
if (hdepth >= ddepth)
- snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
+ snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
else
- snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
+ snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
+ ddepth, aa_desc);
+ return 0;
}
/**
@@ -2461,7 +2481,7 @@ int ata_dev_configure(struct ata_device *dev)
if (ata_id_has_lba(id)) {
const char *lba_desc;
- char ncq_desc[20];
+ char ncq_desc[24];
lba_desc = "LBA";
dev->flags |= ATA_DFLAG_LBA;
@@ -2475,7 +2495,9 @@ int ata_dev_configure(struct ata_device *dev)
}
/* config NCQ */
- ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
+ rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
+ if (rc)
+ return rc;
/* print device info to dmesg */
if (ata_msg_drv(ap) && print_info) {