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Commit 7ae8c5ec authored by Linus Torvalds's avatar Linus Torvalds
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Merge branch 'upstream-fixes' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev

parents e1f1def6 9f68a248
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Showing with 111 additions and 77 deletions
drivers/scsi/ahci.c
View file @ 7ae8c5ec
......@@ -565,6 +565,17 @@ static void ahci_intr_error(struct ata_port *ap, u32 irq_stat)
u32 tmp;
int work;
printk(KERN_WARNING "ata%u: port reset, "
"p_is %x is %x pis %x cmd %x tf %x ss %x se %x\n",
ap->id,
irq_stat,
readl(mmio + HOST_IRQ_STAT),
readl(port_mmio + PORT_IRQ_STAT),
readl(port_mmio + PORT_CMD),
readl(port_mmio + PORT_TFDATA),
readl(port_mmio + PORT_SCR_STAT),
readl(port_mmio + PORT_SCR_ERR));
/* stop DMA */
tmp = readl(port_mmio + PORT_CMD);
tmp &= ~PORT_CMD_START;
......@@ -602,8 +613,6 @@ static void ahci_intr_error(struct ata_port *ap, u32 irq_stat)
tmp |= PORT_CMD_START;
writel(tmp, port_mmio + PORT_CMD);
readl(port_mmio + PORT_CMD); /* flush */
printk(KERN_WARNING "ata%u: error occurred, port reset\n", ap->id);
}
static void ahci_eng_timeout(struct ata_port *ap)
......@@ -614,17 +623,17 @@ static void ahci_eng_timeout(struct ata_port *ap)
struct ata_queued_cmd *qc;
unsigned long flags;
DPRINTK("ENTER\n");
printk(KERN_WARNING "ata%u: handling error/timeout\n", ap->id);
spin_lock_irqsave(&host_set->lock, flags);
ahci_intr_error(ap, readl(port_mmio + PORT_IRQ_STAT));
qc = ata_qc_from_tag(ap, ap->active_tag);
if (!qc) {
printk(KERN_ERR "ata%u: BUG: timeout without command\n",
ap->id);
} else {
ahci_intr_error(ap, readl(port_mmio + PORT_IRQ_STAT));
/* hack alert! We cannot use the supplied completion
* function from inside the ->eh_strategy_handler() thread.
* libata is the only user of ->eh_strategy_handler() in
......@@ -659,9 +668,19 @@ static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
}
if (status & PORT_IRQ_FATAL) {
unsigned int err_mask;
if (status & PORT_IRQ_TF_ERR)
err_mask = AC_ERR_DEV;
else if (status & PORT_IRQ_IF_ERR)
err_mask = AC_ERR_ATA_BUS;
else
err_mask = AC_ERR_HOST_BUS;
/* command processing has stopped due to error; restart */
ahci_intr_error(ap, status);
if (qc)
ata_qc_complete(qc, AC_ERR_OTHER);
ata_qc_complete(qc, err_mask);
}
return 1;
......
drivers/scsi/libata-core.c
View file @ 7ae8c5ec
......@@ -1263,7 +1263,7 @@ static void ata_dev_identify(struct ata_port *ap, unsigned int device)
}
/* ATAPI-specific feature tests */
else {
else if (dev->class == ATA_DEV_ATAPI) {
if (ata_id_is_ata(dev->id)) /* sanity check */
goto err_out_nosup;
......@@ -2399,7 +2399,7 @@ static void ata_sg_clean(struct ata_queued_cmd *qc)
if (qc->flags & ATA_QCFLAG_SINGLE)
assert(qc->n_elem == 1);
DPRINTK("unmapping %u sg elements\n", qc->n_elem);
VPRINTK("unmapping %u sg elements\n", qc->n_elem);
/* if we padded the buffer out to 32-bit bound, and data
* xfer direction is from-device, we must copy from the
......@@ -2409,6 +2409,7 @@ static void ata_sg_clean(struct ata_queued_cmd *qc)
pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
if (qc->flags & ATA_QCFLAG_SG) {
if (qc->n_elem)
dma_unmap_sg(ap->host_set->dev, sg, qc->n_elem, dir);
/* restore last sg */
sg[qc->orig_n_elem - 1].length += qc->pad_len;
......@@ -2419,8 +2420,10 @@ static void ata_sg_clean(struct ata_queued_cmd *qc)
kunmap_atomic(psg->page, KM_IRQ0);
}
} else {
dma_unmap_single(ap->host_set->dev, sg_dma_address(&sg[0]),
sg_dma_len(&sg[0]), dir);
if (sg_dma_len(&sg[0]) > 0)
dma_unmap_single(ap->host_set->dev,
sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
dir);
/* restore sg */
sg->length += qc->pad_len;
if (pad_buf)
......@@ -2619,6 +2622,11 @@ static int ata_sg_setup_one(struct ata_queued_cmd *qc)
sg->length, qc->pad_len);
}
if (!sg->length) {
sg_dma_address(sg) = 0;
goto skip_map;
}
dma_address = dma_map_single(ap->host_set->dev, qc->buf_virt,
sg->length, dir);
if (dma_mapping_error(dma_address)) {
......@@ -2628,6 +2636,7 @@ static int ata_sg_setup_one(struct ata_queued_cmd *qc)
}
sg_dma_address(sg) = dma_address;
skip_map:
sg_dma_len(sg) = sg->length;
DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
......@@ -2655,7 +2664,7 @@ static int ata_sg_setup(struct ata_queued_cmd *qc)
struct ata_port *ap = qc->ap;
struct scatterlist *sg = qc->__sg;
struct scatterlist *lsg = &sg[qc->n_elem - 1];
int n_elem, dir;
int n_elem, pre_n_elem, dir, trim_sg = 0;
VPRINTK("ENTER, ata%u\n", ap->id);
assert(qc->flags & ATA_QCFLAG_SG);
......@@ -2689,13 +2698,24 @@ static int ata_sg_setup(struct ata_queued_cmd *qc)
sg_dma_len(psg) = ATA_DMA_PAD_SZ;
/* trim last sg */
lsg->length -= qc->pad_len;
if (lsg->length == 0)
trim_sg = 1;
DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
qc->n_elem - 1, lsg->length, qc->pad_len);
}
pre_n_elem = qc->n_elem;
if (trim_sg && pre_n_elem)
pre_n_elem--;
if (!pre_n_elem) {
n_elem = 0;
goto skip_map;
}
dir = qc->dma_dir;
n_elem = dma_map_sg(ap->host_set->dev, sg, qc->n_elem, dir);
n_elem = dma_map_sg(ap->host_set->dev, sg, pre_n_elem, dir);
if (n_elem < 1) {
/* restore last sg */
lsg->length += qc->pad_len;
......@@ -2704,6 +2724,7 @@ static int ata_sg_setup(struct ata_queued_cmd *qc)
DPRINTK("%d sg elements mapped\n", n_elem);
skip_map:
qc->n_elem = n_elem;
return 0;
......@@ -3263,32 +3284,11 @@ static void ata_qc_timeout(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
struct ata_host_set *host_set = ap->host_set;
struct ata_device *dev = qc->dev;
u8 host_stat = 0, drv_stat;
unsigned long flags;
DPRINTK("ENTER\n");
/* FIXME: doesn't this conflict with timeout handling? */
if (qc->dev->class == ATA_DEV_ATAPI && qc->scsicmd) {
struct scsi_cmnd *cmd = qc->scsicmd;
if (!(cmd->eh_eflags & SCSI_EH_CANCEL_CMD)) {
/* finish completing original command */
spin_lock_irqsave(&host_set->lock, flags);
__ata_qc_complete(qc);
spin_unlock_irqrestore(&host_set->lock, flags);
atapi_request_sense(ap, dev, cmd);
cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16);
scsi_finish_command(cmd);
goto out;
}
}
spin_lock_irqsave(&host_set->lock, flags);
/* hack alert! We cannot use the supplied completion
......@@ -3327,7 +3327,6 @@ static void ata_qc_timeout(struct ata_queued_cmd *qc)
spin_unlock_irqrestore(&host_set->lock, flags);
out:
DPRINTK("EXIT\n");
}
......@@ -3411,16 +3410,11 @@ struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap,
qc = ata_qc_new(ap);
if (qc) {
qc->__sg = NULL;
qc->flags = 0;
qc->scsicmd = NULL;
qc->ap = ap;
qc->dev = dev;
qc->cursect = qc->cursg = qc->cursg_ofs = 0;
qc->nsect = 0;
qc->nbytes = qc->curbytes = 0;
ata_tf_init(ap, &qc->tf, dev->devno);
ata_qc_reinit(qc);
}
return qc;
......
drivers/scsi/libata-scsi.c
View file @ 7ae8c5ec
......@@ -1955,22 +1955,44 @@ void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8
done(cmd);
}
void atapi_request_sense(struct ata_port *ap, struct ata_device *dev,
struct scsi_cmnd *cmd)
static int atapi_sense_complete(struct ata_queued_cmd *qc,unsigned int err_mask)
{
DECLARE_COMPLETION(wait);
struct ata_queued_cmd *qc;
unsigned long flags;
int rc;
if (err_mask && ((err_mask & AC_ERR_DEV) == 0))
/* FIXME: not quite right; we don't want the
* translation of taskfile registers into
* a sense descriptors, since that's only
* correct for ATA, not ATAPI
*/
ata_gen_ata_desc_sense(qc);
DPRINTK("ATAPI request sense\n");
qc->scsidone(qc->scsicmd);
return 0;
}
qc = ata_qc_new_init(ap, dev);
BUG_ON(qc == NULL);
/* is it pointless to prefer PIO for "safety reasons"? */
static inline int ata_pio_use_silly(struct ata_port *ap)
{
return (ap->flags & ATA_FLAG_PIO_DMA);
}
static void atapi_request_sense(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
struct scsi_cmnd *cmd = qc->scsicmd;
DPRINTK("ATAPI request sense\n");
/* FIXME: is this needed? */
memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
ap->ops->tf_read(ap, &qc->tf);
/* fill these in, for the case where they are -not- overwritten */
cmd->sense_buffer[0] = 0x70;
cmd->sense_buffer[2] = qc->tf.feature >> 4;
ata_qc_reinit(qc);
ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
qc->dma_dir = DMA_FROM_DEVICE;
......@@ -1981,22 +2003,20 @@ void atapi_request_sense(struct ata_port *ap, struct ata_device *dev,
qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
qc->tf.command = ATA_CMD_PACKET;
if (ata_pio_use_silly(ap)) {
qc->tf.protocol = ATA_PROT_ATAPI_DMA;
qc->tf.feature |= ATAPI_PKT_DMA;
} else {
qc->tf.protocol = ATA_PROT_ATAPI;
qc->tf.lbam = (8 * 1024) & 0xff;
qc->tf.lbah = (8 * 1024) >> 8;
}
qc->nbytes = SCSI_SENSE_BUFFERSIZE;
qc->waiting = &wait;
qc->complete_fn = ata_qc_complete_noop;
qc->complete_fn = atapi_sense_complete;
spin_lock_irqsave(&ap->host_set->lock, flags);
rc = ata_qc_issue(qc);
spin_unlock_irqrestore(&ap->host_set->lock, flags);
if (rc)
ata_port_disable(ap);
else
wait_for_completion(&wait);
if (ata_qc_issue(qc))
ata_qc_complete(qc, AC_ERR_OTHER);
DPRINTK("EXIT\n");
}
......@@ -2008,19 +2028,8 @@ static int atapi_qc_complete(struct ata_queued_cmd *qc, unsigned int err_mask)
VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
if (unlikely(err_mask & AC_ERR_DEV)) {
DPRINTK("request check condition\n");
/* FIXME: command completion with check condition
* but no sense causes the error handler to run,
* which then issues REQUEST SENSE, fills in the sense
* buffer, and completes the command (for the second
* time). We need to issue REQUEST SENSE some other
* way, to avoid completing the command twice.
*/
cmd->result = SAM_STAT_CHECK_CONDITION;
qc->scsidone(cmd);
atapi_request_sense(qc);
return 1;
}
......
drivers/scsi/libata.h
View file @ 7ae8c5ec
......@@ -54,8 +54,6 @@ extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);
/* libata-scsi.c */
extern void atapi_request_sense(struct ata_port *ap, struct ata_device *dev,
struct scsi_cmnd *cmd);
extern void ata_scsi_scan_host(struct ata_port *ap);
extern int ata_scsi_error(struct Scsi_Host *host);
extern unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
......
include/linux/libata.h
View file @ 7ae8c5ec
......@@ -59,6 +59,8 @@
#define VPRINTK(fmt, args...)
#endif /* ATA_DEBUG */
#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
#ifdef ATA_NDEBUG
#define assert(expr)
#else
......@@ -119,6 +121,7 @@ enum {
ATA_FLAG_PIO_DMA = (1 << 8), /* PIO cmds via DMA */
ATA_FLAG_NOINTR = (1 << 9), /* FIXME: Remove this once
* proper HSM is in place. */
ATA_FLAG_DEBUGMSG = (1 << 10),
ATA_QCFLAG_ACTIVE = (1 << 1), /* cmd not yet ack'd to scsi lyer */
ATA_QCFLAG_SG = (1 << 3), /* have s/g table? */
......@@ -659,6 +662,17 @@ static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, uns
tf->device = ATA_DEVICE_OBS | ATA_DEV1;
}
static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
{
qc->__sg = NULL;
qc->flags = 0;
qc->cursect = qc->cursg = qc->cursg_ofs = 0;
qc->nsect = 0;
qc->nbytes = qc->curbytes = 0;
ata_tf_init(qc->ap, &qc->tf, qc->dev->devno);
}
/**
* ata_irq_on - Enable interrupts on a port.
......
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