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authorMark Lord <liml@rtr.ca>2008-01-26 18:32:29 -0500
committerJeff Garzik <jeff@garzik.org>2008-02-01 11:29:47 -0500
commitf273827e2aadcf2f74a7bdc9ad715a1b20ea7dda (patch)
tree83cc1a07ad647f8aad2c9a6569fac2193e0ca9eb /drivers
parentcb92441973ebd71d556fc7cdd9e597582327dd71 (diff)
sata_mv ncq Restrict max sectors to 8-bits on GenII NCQ
The GenII chips have only 8-bits for the sector_count field when performing NCQ. Add a dev_config method to restrict this when necessary, taking care not to override any other restriction already in place (likely none, but someday.. ?). Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ata/sata_mv.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 207c400c64df..d15caf32045e 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -449,6 +449,7 @@ static void mv_error_handler(struct ata_port *ap);
449static void mv_post_int_cmd(struct ata_queued_cmd *qc); 449static void mv_post_int_cmd(struct ata_queued_cmd *qc);
450static void mv_eh_freeze(struct ata_port *ap); 450static void mv_eh_freeze(struct ata_port *ap);
451static void mv_eh_thaw(struct ata_port *ap); 451static void mv_eh_thaw(struct ata_port *ap);
452static void mv6_dev_config(struct ata_device *dev);
452static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); 453static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
453 454
454static void mv5_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio, 455static void mv5_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
@@ -541,6 +542,7 @@ static const struct ata_port_operations mv5_ops = {
541}; 542};
542 543
543static const struct ata_port_operations mv6_ops = { 544static const struct ata_port_operations mv6_ops = {
545 .dev_config = mv6_dev_config,
544 .tf_load = ata_tf_load, 546 .tf_load = ata_tf_load,
545 .tf_read = ata_tf_read, 547 .tf_read = ata_tf_read,
546 .check_status = ata_check_status, 548 .check_status = ata_check_status,
@@ -1054,6 +1056,17 @@ static int mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val)
1054 return -EINVAL; 1056 return -EINVAL;
1055} 1057}
1056 1058
1059static void mv6_dev_config(struct ata_device *adev)
1060{
1061 /*
1062 * We don't have hob_nsect when doing NCQ commands on Gen-II.
1063 * See mv_qc_prep() for more info.
1064 */
1065 if (adev->flags & ATA_DFLAG_NCQ)
1066 if (adev->max_sectors > ATA_MAX_SECTORS)
1067 adev->max_sectors = ATA_MAX_SECTORS;
1068}
1069
1057static void mv_edma_cfg(struct mv_port_priv *pp, struct mv_host_priv *hpriv, 1070static void mv_edma_cfg(struct mv_port_priv *pp, struct mv_host_priv *hpriv,
1058 void __iomem *port_mmio, int want_ncq) 1071 void __iomem *port_mmio, int want_ncq)
1059{ 1072{