static int ata_dev_set_mode(struct ata_device *dev)
{
struct ata_eh_context *ehc = &dev->link->eh_context;
+ const char *dev_err_whine = "";
+ int ign_dev_err = 0;
unsigned int err_mask;
int rc;
err_mask = ata_dev_set_xfermode(dev);
+ if (err_mask & ~AC_ERR_DEV)
+ goto fail;
+
+ /* revalidate */
+ ehc->i.flags |= ATA_EHI_POST_SETMODE;
+ rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
+ ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
+ if (rc)
+ return rc;
+
/* Old CFA may refuse this command, which is just fine */
if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id))
- err_mask &= ~AC_ERR_DEV;
+ ign_dev_err = 1;
/* Some very old devices and some bad newer ones fail any kind of
SET_XFERMODE request but support PIO0-2 timings and no IORDY */
if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) &&
dev->pio_mode <= XFER_PIO_2)
- err_mask &= ~AC_ERR_DEV;
+ ign_dev_err = 1;
/* Early MWDMA devices do DMA but don't allow DMA mode setting.
Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
dev->dma_mode == XFER_MW_DMA_0 &&
(dev->id[63] >> 8) & 1)
- err_mask &= ~AC_ERR_DEV;
+ ign_dev_err = 1;
- if (err_mask) {
- ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
- "(err_mask=0x%x)\n", err_mask);
- return -EIO;
- }
+ /* if the device is actually configured correctly, ignore dev err */
+ if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
+ ign_dev_err = 1;
- ehc->i.flags |= ATA_EHI_POST_SETMODE;
- rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
- ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
- if (rc)
- return rc;
+ if (err_mask & AC_ERR_DEV) {
+ if (!ign_dev_err)
+ goto fail;
+ else
+ dev_err_whine = " (device error ignored)";
+ }
DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
dev->xfer_shift, (int)dev->xfer_mode);
- ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
- ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
+ ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n",
+ ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
+ dev_err_whine);
+
return 0;
+
+ fail:
+ ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
+ "(err_mask=0x%x)\n", err_mask);
+ return -EIO;
}
/**
/* Devices which report 1 sector over size HPA */
{ "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
{ "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
+ { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
/* Devices which get the IVB wrong */
{ "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
struct ata_port *ap = qc->ap;
struct scatterlist *sg = qc->sg;
int dir = qc->dma_dir;
- void *pad_buf = NULL;
WARN_ON(sg == NULL);
- VPRINTK("unmapping %u sg elements\n", qc->mapped_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
- * pad buffer back into the supplied buffer
- */
- if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
- pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
-
- if (qc->mapped_n_elem)
- dma_unmap_sg(ap->dev, sg, qc->mapped_n_elem, dir);
- /* restore last sg */
- if (qc->last_sg)
- *qc->last_sg = qc->saved_last_sg;
- if (pad_buf) {
- struct scatterlist *psg = &qc->extra_sg[1];
- void *addr = kmap_atomic(sg_page(psg), KM_IRQ0);
- memcpy(addr + psg->offset, pad_buf, qc->pad_len);
- kunmap_atomic(addr, KM_IRQ0);
- }
+ if (qc->n_elem)
+ dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
qc->flags &= ~ATA_QCFLAG_DMAMAP;
qc->sg = NULL;
*/
static int atapi_qc_may_overflow(struct ata_queued_cmd *qc)
{
- if (qc->tf.protocol != ATAPI_PROT_PIO &&
- qc->tf.protocol != ATAPI_PROT_DMA)
- return 0;
-
- if (qc->tf.flags & ATA_TFLAG_WRITE)
- return 0;
-
- switch (qc->cdb[0]) {
- case READ_10:
- case READ_12:
- case WRITE_10:
- case WRITE_12:
- case GPCMD_READ_CD:
- case GPCMD_READ_CD_MSF:
- return 0;
- }
-
- return 1;
+ return ata_is_atapi(qc->tf.protocol) && ata_is_data(qc->tf.protocol) &&
+ atapi_cmd_type(qc->cdb[0]) == ATAPI_MISC &&
+ !(qc->tf.flags & ATA_TFLAG_WRITE);
}
/**
qc->cursg = qc->sg;
}
-static unsigned int ata_sg_setup_extra(struct ata_queued_cmd *qc,
- unsigned int *n_elem_extra,
- unsigned int *nbytes_extra)
-{
- struct ata_port *ap = qc->ap;
- unsigned int n_elem = qc->n_elem;
- struct scatterlist *lsg, *copy_lsg = NULL, *tsg = NULL, *esg = NULL;
-
- *n_elem_extra = 0;
- *nbytes_extra = 0;
-
- /* needs padding? */
- qc->pad_len = qc->nbytes & 3;
-
- if (likely(!qc->pad_len))
- return n_elem;
-
- /* locate last sg and save it */
- lsg = sg_last(qc->sg, n_elem);
- qc->last_sg = lsg;
- qc->saved_last_sg = *lsg;
-
- sg_init_table(qc->extra_sg, ARRAY_SIZE(qc->extra_sg));
-
- if (qc->pad_len) {
- struct scatterlist *psg = &qc->extra_sg[1];
- void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
- unsigned int offset;
-
- WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
-
- memset(pad_buf, 0, ATA_DMA_PAD_SZ);
-
- /* psg->page/offset are used to copy to-be-written
- * data in this function or read data in ata_sg_clean.
- */
- offset = lsg->offset + lsg->length - qc->pad_len;
- sg_set_page(psg, nth_page(sg_page(lsg), offset >> PAGE_SHIFT),
- qc->pad_len, offset_in_page(offset));
-
- if (qc->tf.flags & ATA_TFLAG_WRITE) {
- void *addr = kmap_atomic(sg_page(psg), KM_IRQ0);
- memcpy(pad_buf, addr + psg->offset, qc->pad_len);
- kunmap_atomic(addr, KM_IRQ0);
- }
-
- sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
- sg_dma_len(psg) = ATA_DMA_PAD_SZ;
-
- /* Trim the last sg entry and chain the original and
- * padding sg lists.
- *
- * Because chaining consumes one sg entry, one extra
- * sg entry is allocated and the last sg entry is
- * copied to it if the length isn't zero after padded
- * amount is removed.
- *
- * If the last sg entry is completely replaced by
- * padding sg entry, the first sg entry is skipped
- * while chaining.
- */
- lsg->length -= qc->pad_len;
- if (lsg->length) {
- copy_lsg = &qc->extra_sg[0];
- tsg = &qc->extra_sg[0];
- } else {
- n_elem--;
- tsg = &qc->extra_sg[1];
- }
-
- esg = &qc->extra_sg[1];
-
- (*n_elem_extra)++;
- (*nbytes_extra) += 4 - qc->pad_len;
- }
-
- if (copy_lsg)
- sg_set_page(copy_lsg, sg_page(lsg), lsg->length, lsg->offset);
-
- sg_chain(lsg, 1, tsg);
- sg_mark_end(esg);
-
- /* sglist can't start with chaining sg entry, fast forward */
- if (qc->sg == lsg) {
- qc->sg = tsg;
- qc->cursg = tsg;
- }
-
- return n_elem;
-}
-
/**
* ata_sg_setup - DMA-map the scatter-gather table associated with a command.
* @qc: Command with scatter-gather table to be mapped.
static int ata_sg_setup(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
- unsigned int n_elem, n_elem_extra, nbytes_extra;
+ unsigned int n_elem;
VPRINTK("ENTER, ata%u\n", ap->print_id);
- n_elem = ata_sg_setup_extra(qc, &n_elem_extra, &nbytes_extra);
+ n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
+ if (n_elem < 1)
+ return -1;
- if (n_elem) {
- n_elem = dma_map_sg(ap->dev, qc->sg, n_elem, qc->dma_dir);
- if (n_elem < 1) {
- /* restore last sg */
- if (qc->last_sg)
- *qc->last_sg = qc->saved_last_sg;
- return -1;
- }
- DPRINTK("%d sg elements mapped\n", n_elem);
- }
+ DPRINTK("%d sg elements mapped\n", n_elem);
- qc->n_elem = qc->mapped_n_elem = n_elem;
- qc->n_elem += n_elem_extra;
- qc->nbytes += nbytes_extra;
+ qc->n_elem = n_elem;
qc->flags |= ATA_QCFLAG_DMAMAP;
return 0;
*/
static int __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
{
- int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
+ int rw = (qc->tf.flags & ATA_TFLAG_WRITE) ? WRITE : READ;
struct ata_port *ap = qc->ap;
- struct ata_eh_info *ehi = &qc->dev->link->eh_info;
+ struct ata_device *dev = qc->dev;
+ struct ata_eh_info *ehi = &dev->link->eh_info;
struct scatterlist *sg;
struct page *page;
unsigned char *buf;
- unsigned int offset, count;
+ unsigned int offset, count, consumed;
next_sg:
sg = qc->cursg;
* - for write case, padding zero data to the device
*/
u16 pad_buf[1] = { 0 };
- unsigned int i;
- if (bytes > qc->curbytes - qc->nbytes + ATAPI_MAX_DRAIN) {
+ if (qc->curbytes + bytes > qc->nbytes + ATAPI_MAX_DRAIN) {
ata_ehi_push_desc(ehi, "too much trailing data "
"buf=%u cur=%u bytes=%u",
qc->nbytes, qc->curbytes, bytes);
return -1;
}
- /* overflow is exptected for misc ATAPI commands */
- if (bytes && !atapi_qc_may_overflow(qc))
- ata_dev_printk(qc->dev, KERN_WARNING, "ATAPI %u bytes "
- "trailing data (cdb=%02x nbytes=%u)\n",
- bytes, qc->cdb[0], qc->nbytes);
+ /* allow overflow only for misc ATAPI commands */
+ if (!atapi_qc_may_overflow(qc)) {
+ ata_ehi_push_desc(ehi, "unexpected trailing data "
+ "%u bytes", bytes);
+ return -1;
+ }
- for (i = 0; i < (bytes + 1) / 2; i++)
- ap->ops->data_xfer(qc->dev, (unsigned char *)pad_buf, 2, do_write);
+ consumed = 0;
+ while (consumed < bytes)
+ consumed += ap->ops->data_xfer(dev,
+ (unsigned char *)pad_buf, 2, rw);
qc->curbytes += bytes;
-
return 0;
}
buf = kmap_atomic(page, KM_IRQ0);
/* do the actual data transfer */
- ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
+ consumed = ap->ops->data_xfer(dev, buf + offset, count, rw);
kunmap_atomic(buf, KM_IRQ0);
local_irq_restore(flags);
} else {
buf = page_address(page);
- ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
+ consumed = ap->ops->data_xfer(dev, buf + offset, count, rw);
}
- bytes -= count;
- if ((count & 1) && bytes)
- bytes--;
+ bytes -= min(bytes, consumed);
qc->curbytes += count;
qc->cursg_ofs += count;
qc->cursg_ofs = 0;
}
+ /* consumed can be larger than count only for the last transfer */
+ WARN_ON(qc->cursg && count != consumed);
+
if (bytes)
goto next_sg;
-
return 0;
}
{
struct ata_port *ap = qc->ap;
struct ata_device *dev = qc->dev;
+ struct ata_eh_info *ehi = &dev->link->eh_info;
unsigned int ireason, bc_lo, bc_hi, bytes;
int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
/* shall be cleared to zero, indicating xfer of data */
if (unlikely(ireason & (1 << 0)))
- goto err_out;
+ goto atapi_check;
/* make sure transfer direction matches expected */
i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
if (unlikely(do_write != i_write))
- goto err_out;
+ goto atapi_check;
if (unlikely(!bytes))
- goto err_out;
+ goto atapi_check;
VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes);
- if (__atapi_pio_bytes(qc, bytes))
+ if (unlikely(__atapi_pio_bytes(qc, bytes)))
goto err_out;
ata_altstatus(ap); /* flush */
return;
-err_out:
- ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n");
+ atapi_check:
+ ata_ehi_push_desc(ehi, "ATAPI check failed (ireason=0x%x bytes=%u)",
+ ireason, bytes);
+ err_out:
qc->err_mask |= AC_ERR_HSM;
ap->hsm_task_state = HSM_ST_ERR;
}
*/
BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes));
- /* ata_sg_setup() may update nbytes */
- qc->raw_nbytes = qc->nbytes;
-
if (ata_is_dma(prot) || (ata_is_pio(prot) &&
(ap->flags & ATA_FLAG_PIO_DMA)))
if (ata_sg_setup(qc))
int ata_port_start(struct ata_port *ap)
{
struct device *dev = ap->dev;
- int rc;
ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma,
GFP_KERNEL);
if (!ap->prd)
return -ENOMEM;
- rc = ata_pad_alloc(ap, dev);
- if (rc)
- return rc;
-
- DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd,
- (unsigned long long)ap->prd_dma);
return 0;
}
DPRINTK("probe begin\n");
for (i = 0; i < host->n_ports; i++) {
struct ata_port *ap = host->ports[i];
- int rc;
/* probe */
if (ap->ops->error_handler) {
projects / linux-2.6-omap-h63xx.git / blobdiff