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[libata] ensure ->tf_read() hook reads Status and Error registers 

We want ->tf_read() to get a complete snapshot of all taskfile
registers, without requiring the callers to manually call
ata_chk_status() and ata_chk_err() themselves.

This also fixes a minor bug in sata_vsc where the lower bits of the
feature register were incorrectly placed in the HOB (high order bits)
portion of struct ata_taskfile.
This commit is contained in:
Jeff Garzik 2005-10-29 13:58:21 -04:00
parent 9dfb7808fb
commit ac19bff25b
5 changed files with 36 additions and 14 deletions
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4
drivers/scsi/libata-core.c
View File

@ -370,6 +370,8 @@ static void ata_tf_read_pio(struct ata_port *ap, struct ata_taskfile *tf)
{
struct ata_ioports *ioaddr = &ap->ioaddr;
tf->command = ata_check_status(ap);
tf->feature = ata_chk_err(ap);
tf->nsect = inb(ioaddr->nsect_addr);
tf->lbal = inb(ioaddr->lbal_addr);
tf->lbam = inb(ioaddr->lbam_addr);
@ -402,6 +404,8 @@ static void ata_tf_read_mmio(struct ata_port *ap, struct ata_taskfile *tf)
{
struct ata_ioports *ioaddr = &ap->ioaddr;
tf->command = ata_check_status(ap);
tf->feature = ata_chk_err(ap);
tf->nsect = readb((void __iomem *)ioaddr->nsect_addr);
tf->lbal = readb((void __iomem *)ioaddr->lbal_addr);
tf->lbam = readb((void __iomem *)ioaddr->lbam_addr);

2
drivers/scsi/pdc_adma.c
View File

@ -490,7 +490,7 @@ static inline unsigned int adma_intr_mmio(struct ata_host_set *host_set)
if (qc && (!(qc->tf.ctl & ATA_NIEN))) {
/* check main status, clearing INTRQ */
u8 status = ata_chk_status(ap);
u8 status = ata_check_status(ap);
if ((status & ATA_BUSY))
continue;
DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n",

2
drivers/scsi/sata_qstor.c
View File

@ -433,7 +433,7 @@ static inline unsigned int qs_intr_mmio(struct ata_host_set *host_set)
if (qc && (!(qc->tf.ctl & ATA_NIEN))) {
/* check main status, clearing INTRQ */
u8 status = ata_chk_status(ap);
u8 status = ata_check_status(ap);
if ((status & ATA_BUSY))
continue;
DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n",

22
drivers/scsi/sata_svw.c
View File

@ -84,6 +84,8 @@
/* Port stride */
#define K2_SATA_PORT_OFFSET 0x100
static u8 k2_stat_check_status(struct ata_port *ap);
static u32 k2_sata_scr_read (struct ata_port *ap, unsigned int sc_reg)
{
@ -136,16 +138,24 @@ static void k2_sata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
static void k2_sata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
{
struct ata_ioports *ioaddr = &ap->ioaddr;
u16 nsect, lbal, lbam, lbah;
u16 nsect, lbal, lbam, lbah, feature;
nsect = tf->nsect = readw(ioaddr->nsect_addr);
lbal = tf->lbal = readw(ioaddr->lbal_addr);
lbam = tf->lbam = readw(ioaddr->lbam_addr);
lbah = tf->lbah = readw(ioaddr->lbah_addr);
tf->command = k2_stat_check_status(ap);
tf->device = readw(ioaddr->device_addr);
feature = readw(ioaddr->error_addr);
nsect = readw(ioaddr->nsect_addr);
lbal = readw(ioaddr->lbal_addr);
lbam = readw(ioaddr->lbam_addr);
lbah = readw(ioaddr->lbah_addr);
tf->feature = feature;
tf->nsect = nsect;
tf->lbal = lbal;
tf->lbam = lbam;
tf->lbah = lbah;
if (tf->flags & ATA_TFLAG_LBA48) {
tf->hob_feature = readw(ioaddr->error_addr) >> 8;
tf->hob_feature = feature >> 8;
tf->hob_nsect = nsect >> 8;
tf->hob_lbal = lbal >> 8;
tf->hob_lbam = lbam >> 8;

20
drivers/scsi/sata_vsc.c
View File

@ -153,16 +153,24 @@ static void vsc_sata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
static void vsc_sata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
{
struct ata_ioports *ioaddr = &ap->ioaddr;
u16 nsect, lbal, lbam, lbah;
u16 nsect, lbal, lbam, lbah, feature;
nsect = tf->nsect = readw(ioaddr->nsect_addr);
lbal = tf->lbal = readw(ioaddr->lbal_addr);
lbam = tf->lbam = readw(ioaddr->lbam_addr);
lbah = tf->lbah = readw(ioaddr->lbah_addr);
tf->command = ata_check_status(ap);
tf->device = readw(ioaddr->device_addr);
feature = readw(ioaddr->error_addr);
nsect = readw(ioaddr->nsect_addr);
lbal = readw(ioaddr->lbal_addr);
lbam = readw(ioaddr->lbam_addr);
lbah = readw(ioaddr->lbah_addr);
tf->feature = feature;
tf->nsect = nsect;
tf->lbal = lbal;
tf->lbam = lbam;
tf->lbah = lbah;
if (tf->flags & ATA_TFLAG_LBA48) {
tf->hob_feature = readb(ioaddr->error_addr);
tf->hob_feature = feature >> 8;
tf->hob_nsect = nsect >> 8;
tf->hob_lbal = lbal >> 8;
tf->hob_lbam = lbam >> 8;