static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
{
struct scatterlist *sg;
- struct ahci_sg *ahci_sg;
- unsigned int n_sg = 0;
+ struct ahci_sg *ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
+ unsigned int si;
VPRINTK("ENTER\n");
/*
* Next, the S/G list.
*/
- ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
- ata_for_each_sg(sg, qc) {
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
dma_addr_t addr = sg_dma_address(sg);
u32 sg_len = sg_dma_len(sg);
- ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
- ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
- ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
-
- ahci_sg++;
- n_sg++;
+ ahci_sg[si].addr = cpu_to_le32(addr & 0xffffffff);
+ ahci_sg[si].addr_hi = cpu_to_le32((addr >> 16) >> 16);
+ ahci_sg[si].flags_size = cpu_to_le32(sg_len - 1);
}
- return n_sg;
+ return si;
}
static void ahci_qc_prep(struct ata_queued_cmd *qc)
void ata_sg_clean(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
- struct scatterlist *sg = qc->__sg;
+ 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->n_elem);
+ VPRINTK("unmapping %u sg elements\n", qc->mapped_n_elem);
/* if we padded the buffer out to 32-bit bound, and data
* xfer direction is from-device, we must copy from the
if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
- if (qc->n_elem)
- dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
+ if (qc->mapped_n_elem)
+ dma_unmap_sg(ap->dev, sg, qc->mapped_n_elem, dir);
/* restore last sg */
- sg_last(sg, qc->orig_n_elem)->length += qc->pad_len;
+ if (qc->last_sg)
+ *qc->last_sg = qc->saved_last_sg;
if (pad_buf) {
- struct scatterlist *psg = &qc->pad_sgent;
+ 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);
}
qc->flags &= ~ATA_QCFLAG_DMAMAP;
- qc->__sg = NULL;
+ qc->sg = NULL;
}
/**
{
struct ata_port *ap = qc->ap;
struct scatterlist *sg;
- unsigned int idx;
+ unsigned int si, pi;
- WARN_ON(qc->__sg == NULL);
- WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
-
- idx = 0;
- ata_for_each_sg(sg, qc) {
+ pi = 0;
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
u32 addr, offset;
u32 sg_len, len;
if ((offset + sg_len) > 0x10000)
len = 0x10000 - offset;
- ap->prd[idx].addr = cpu_to_le32(addr);
- ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
- VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
+ ap->prd[pi].addr = cpu_to_le32(addr);
+ ap->prd[pi].flags_len = cpu_to_le32(len & 0xffff);
+ VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len);
- idx++;
+ pi++;
sg_len -= len;
addr += len;
}
}
- if (idx)
- ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
+ ap->prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
}
/**
{
struct ata_port *ap = qc->ap;
struct scatterlist *sg;
- unsigned int idx;
-
- WARN_ON(qc->__sg == NULL);
- WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
+ unsigned int si, pi;
- idx = 0;
- ata_for_each_sg(sg, qc) {
+ pi = 0;
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
u32 addr, offset;
u32 sg_len, len, blen;
len = 0x10000 - offset;
blen = len & 0xffff;
- ap->prd[idx].addr = cpu_to_le32(addr);
+ ap->prd[pi].addr = cpu_to_le32(addr);
if (blen == 0) {
/* Some PATA chipsets like the CS5530 can't
cope with 0x0000 meaning 64K as the spec says */
- ap->prd[idx].flags_len = cpu_to_le32(0x8000);
+ ap->prd[pi].flags_len = cpu_to_le32(0x8000);
blen = 0x8000;
- ap->prd[++idx].addr = cpu_to_le32(addr + 0x8000);
+ ap->prd[++pi].addr = cpu_to_le32(addr + 0x8000);
}
- ap->prd[idx].flags_len = cpu_to_le32(blen);
- VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
+ ap->prd[pi].flags_len = cpu_to_le32(blen);
+ VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len);
- idx++;
+ pi++;
sg_len -= len;
addr += len;
}
}
- if (idx)
- ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
+ ap->prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
}
/**
void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
unsigned int n_elem)
{
- qc->__sg = sg;
+ qc->sg = sg;
qc->n_elem = n_elem;
- qc->orig_n_elem = n_elem;
- qc->cursg = qc->__sg;
+ qc->cursg = qc->sg;
}
-/**
- * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
- * @qc: Command with scatter-gather table to be mapped.
- *
- * DMA-map the scatter-gather table associated with queued_cmd @qc.
- *
- * LOCKING:
- * spin_lock_irqsave(host lock)
- *
- * RETURNS:
- * Zero on success, negative on error.
- *
- */
-
-static int ata_sg_setup(struct ata_queued_cmd *qc)
+static unsigned int ata_sg_setup_extra(struct ata_queued_cmd *qc,
+ unsigned int *n_elem_extra)
{
struct ata_port *ap = qc->ap;
- struct scatterlist *sg = qc->__sg;
- struct scatterlist *lsg = sg_last(qc->__sg, qc->n_elem);
- int n_elem, pre_n_elem, dir, trim_sg = 0;
+ unsigned int n_elem = qc->n_elem;
+ struct scatterlist *lsg, *copy_lsg = NULL, *tsg = NULL, *esg = NULL;
- VPRINTK("ENTER, ata%u\n", ap->print_id);
+ *n_elem_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));
- /* we must lengthen transfers to end on a 32-bit boundary */
- qc->pad_len = lsg->length & 3;
if (qc->pad_len) {
+ struct scatterlist *psg = &qc->extra_sg[1];
void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
- struct scatterlist *psg = &qc->pad_sgent;
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
+ /* 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_init_table(psg, 1);
sg_set_page(psg, nth_page(sg_page(lsg), offset >> PAGE_SHIFT),
- qc->pad_len, offset_in_page(offset));
+ qc->pad_len, offset_in_page(offset));
if (qc->tf.flags & ATA_TFLAG_WRITE) {
void *addr = kmap_atomic(sg_page(psg), KM_IRQ0);
sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
sg_dma_len(psg) = ATA_DMA_PAD_SZ;
- /* trim last sg */
+
+ /* 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 == 0)
- trim_sg = 1;
+ 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];
- DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
- qc->n_elem - 1, lsg->length, qc->pad_len);
+ (*n_elem_extra)++;
}
- pre_n_elem = qc->n_elem;
- if (trim_sg && pre_n_elem)
- pre_n_elem--;
+ if (copy_lsg)
+ sg_set_page(copy_lsg, sg_page(lsg), lsg->length, lsg->offset);
- if (!pre_n_elem) {
- n_elem = 0;
- goto skip_map;
+ 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;
}
- dir = qc->dma_dir;
- n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
- if (n_elem < 1) {
- /* restore last sg */
- lsg->length += qc->pad_len;
- return -1;
+ 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.
+ *
+ * DMA-map the scatter-gather table associated with queued_cmd @qc.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host lock)
+ *
+ * RETURNS:
+ * Zero on success, negative on error.
+ *
+ */
+static int ata_sg_setup(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+ unsigned int n_elem, n_elem_extra;
+
+ VPRINTK("ENTER, ata%u\n", ap->print_id);
+
+ n_elem = ata_sg_setup_extra(qc, &n_elem_extra);
+
+ 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;
-skip_map:
- qc->n_elem = n_elem;
qc->flags |= ATA_QCFLAG_DMAMAP;
return 0;
/* We guarantee to LLDs that they will have at least one
* non-zero sg if the command is a data command.
*/
- BUG_ON(ata_is_data(prot) && (!qc->__sg || !qc->n_elem || !qc->nbytes));
+ BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes));
if (ata_is_dma(prot) || (ata_is_pio(prot) &&
(ap->flags & ATA_FLAG_PIO_DMA)))
qc->scsicmd = cmd;
qc->scsidone = done;
- qc->__sg = scsi_sglist(cmd);
+ qc->sg = scsi_sglist(cmd);
qc->n_elem = scsi_sg_count(cmd);
} else {
cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
{
unsigned short config = WDSIZE_16;
struct scatterlist *sg;
+ unsigned int si;
pr_debug("in atapi dma setup\n");
/* Program the ATA_CTRL register with dir */
/* fill the ATAPI DMA controller */
set_dma_config(CH_ATAPI_TX, config);
set_dma_x_modify(CH_ATAPI_TX, 2);
- ata_for_each_sg(sg, qc) {
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
set_dma_start_addr(CH_ATAPI_TX, sg_dma_address(sg));
set_dma_x_count(CH_ATAPI_TX, sg_dma_len(sg) >> 1);
}
/* fill the ATAPI DMA controller */
set_dma_config(CH_ATAPI_RX, config);
set_dma_x_modify(CH_ATAPI_RX, 2);
- ata_for_each_sg(sg, qc) {
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
set_dma_start_addr(CH_ATAPI_RX, sg_dma_address(sg));
set_dma_x_count(CH_ATAPI_RX, sg_dma_len(sg) >> 1);
}
struct ata_port *ap = qc->ap;
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
struct scatterlist *sg;
+ unsigned int si;
pr_debug("in atapi dma start\n");
if (!(ap->udma_mask || ap->mwdma_mask))
* data cache is enabled. Otherwise, this loop
* is an empty loop and optimized out.
*/
- ata_for_each_sg(sg, qc) {
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
flush_dcache_range(sg_dma_address(sg),
sg_dma_address(sg) + sg_dma_len(sg));
}
ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | TFRCNT_RST);
/* Set transfer length to buffer len */
- ata_for_each_sg(sg, qc) {
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
ATAPI_SET_XFER_LEN(base, (sg_dma_len(sg) >> 1));
}
{
struct ata_port *ap = qc->ap;
struct scatterlist *sg;
+ unsigned int si;
pr_debug("in atapi dma stop\n");
if (!(ap->udma_mask || ap->mwdma_mask))
* data cache is enabled. Otherwise, this loop
* is an empty loop and optimized out.
*/
- ata_for_each_sg(sg, qc) {
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
invalidate_dcache_range(
sg_dma_address(sg),
sg_dma_address(sg)
struct pata_icside_state *state = ap->host->private_data;
struct scatterlist *sg, *rsg = state->sg;
unsigned int write = qc->tf.flags & ATA_TFLAG_WRITE;
+ unsigned int si;
/*
* We are simplex; BUG if we try to fiddle with DMA
/*
* Copy ATAs scattered sg list into a contiguous array of sg
*/
- ata_for_each_sg(sg, qc) {
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
memcpy(rsg, sg, sizeof(*sg));
rsg++;
}
u8 *buf = pp->pkt, *last_buf = NULL;
int i = (2 + buf[3]) * 8;
u8 pFLAGS = pORD | ((qc->tf.flags & ATA_TFLAG_WRITE) ? pDIRO : 0);
+ unsigned int si;
- ata_for_each_sg(sg, qc) {
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
u32 addr;
u32 len;
struct scatterlist *sg;
unsigned int num_prde = 0;
u32 ttl_dwords = 0;
+ unsigned int si;
/*
* NOTE : direct & indirect prdt's are contigiously allocated
struct prde *prd_ptr_to_indirect_ext = NULL;
unsigned indirect_ext_segment_sz = 0;
dma_addr_t indirect_ext_segment_paddr;
+ unsigned int si;
VPRINTK("SATA FSL : cd = 0x%x, prd = 0x%x\n", cmd_desc, prd);
indirect_ext_segment_paddr = cmd_desc_paddr +
SATA_FSL_CMD_DESC_OFFSET_TO_PRDT + SATA_FSL_MAX_PRD_DIRECT * 16;
- ata_for_each_sg(sg, qc) {
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
dma_addr_t sg_addr = sg_dma_address(sg);
u32 sg_len = sg_dma_len(sg);
struct mv_port_priv *pp = qc->ap->private_data;
struct scatterlist *sg;
struct mv_sg *mv_sg, *last_sg = NULL;
+ unsigned int si;
mv_sg = pp->sg_tbl;
- ata_for_each_sg(sg, qc) {
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
dma_addr_t addr = sg_dma_address(sg);
u32 sg_len = sg_dma_len(sg);
static void nv_adma_fill_sg(struct ata_queued_cmd *qc, struct nv_adma_cpb *cpb)
{
struct nv_adma_port_priv *pp = qc->ap->private_data;
- unsigned int idx;
struct nv_adma_prd *aprd;
struct scatterlist *sg;
+ unsigned int si;
VPRINTK("ENTER\n");
- idx = 0;
-
- ata_for_each_sg(sg, qc) {
- aprd = (idx < 5) ? &cpb->aprd[idx] :
- &pp->aprd[NV_ADMA_SGTBL_LEN * qc->tag + (idx-5)];
- nv_adma_fill_aprd(qc, sg, idx, aprd);
- idx++;
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
+ aprd = (si < 5) ? &cpb->aprd[si] :
+ &pp->aprd[NV_ADMA_SGTBL_LEN * qc->tag + (si-5)];
+ nv_adma_fill_aprd(qc, sg, si, aprd);
}
- if (idx > 5)
+ if (si > 5)
cpb->next_aprd = cpu_to_le64(((u64)(pp->aprd_dma + NV_ADMA_SGTBL_SZ * qc->tag)));
else
cpb->next_aprd = cpu_to_le64(0);
{
struct ata_port *ap = qc->ap;
struct scatterlist *sg;
- unsigned int idx;
struct nv_swncq_port_priv *pp = ap->private_data;
struct ata_prd *prd;
-
- WARN_ON(qc->__sg == NULL);
- WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
+ unsigned int si, idx;
prd = pp->prd + ATA_MAX_PRD * qc->tag;
idx = 0;
- ata_for_each_sg(sg, qc) {
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
u32 addr, offset;
u32 sg_len, len;
}
}
- if (idx)
- prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
+ prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
}
static unsigned int nv_swncq_issue_atacmd(struct ata_port *ap,
{
struct ata_port *ap = qc->ap;
struct scatterlist *sg;
- unsigned int idx;
const u32 SG_COUNT_ASIC_BUG = 41*4;
+ unsigned int si, idx;
+ u32 len;
if (!(qc->flags & ATA_QCFLAG_DMAMAP))
return;
- WARN_ON(qc->__sg == NULL);
- WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
-
idx = 0;
- ata_for_each_sg(sg, qc) {
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
u32 addr, offset;
u32 sg_len, len;
}
}
- if (idx) {
- u32 len = le32_to_cpu(ap->prd[idx - 1].flags_len);
+ len = le32_to_cpu(ap->prd[idx - 1].flags_len);
- if (len > SG_COUNT_ASIC_BUG) {
- u32 addr;
+ if (len > SG_COUNT_ASIC_BUG) {
+ u32 addr;
- VPRINTK("Splitting last PRD.\n");
+ VPRINTK("Splitting last PRD.\n");
- addr = le32_to_cpu(ap->prd[idx - 1].addr);
- ap->prd[idx - 1].flags_len = cpu_to_le32(len - SG_COUNT_ASIC_BUG);
- VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx - 1, addr, SG_COUNT_ASIC_BUG);
+ addr = le32_to_cpu(ap->prd[idx - 1].addr);
+ ap->prd[idx - 1].flags_len = cpu_to_le32(len - SG_COUNT_ASIC_BUG);
+ VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx - 1, addr, SG_COUNT_ASIC_BUG);
- addr = addr + len - SG_COUNT_ASIC_BUG;
- len = SG_COUNT_ASIC_BUG;
- ap->prd[idx].addr = cpu_to_le32(addr);
- ap->prd[idx].flags_len = cpu_to_le32(len);
- VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
+ addr = addr + len - SG_COUNT_ASIC_BUG;
+ len = SG_COUNT_ASIC_BUG;
+ ap->prd[idx].addr = cpu_to_le32(addr);
+ ap->prd[idx].flags_len = cpu_to_le32(len);
+ VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
- idx++;
- }
-
- ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
+ idx++;
}
+
+ ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
}
static void pdc_qc_prep(struct ata_queued_cmd *qc)
struct scatterlist *sg;
struct ata_port *ap = qc->ap;
struct qs_port_priv *pp = ap->private_data;
- unsigned int nelem;
u8 *prd = pp->pkt + QS_CPB_BYTES;
+ unsigned int si;
- WARN_ON(qc->__sg == NULL);
- WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
-
- nelem = 0;
- ata_for_each_sg(sg, qc) {
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
u64 addr;
u32 len;
*(__le32 *)prd = cpu_to_le32(len);
prd += sizeof(u64);
- VPRINTK("PRD[%u] = (0x%llX, 0x%X)\n", nelem,
+ VPRINTK("PRD[%u] = (0x%llX, 0x%X)\n", si,
(unsigned long long)addr, len);
- nelem++;
}
- return nelem;
+ return si;
}
static void qs_qc_prep(struct ata_queued_cmd *qc)
{
struct scatterlist *sg;
struct sil24_sge *last_sge = NULL;
+ unsigned int si;
- ata_for_each_sg(sg, qc) {
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
sge->addr = cpu_to_le64(sg_dma_address(sg));
sge->cnt = cpu_to_le32(sg_dma_len(sg));
sge->flags = 0;
sge++;
}
- if (likely(last_sge))
- last_sge->flags = cpu_to_le32(SGE_TRM);
+ last_sge->flags = cpu_to_le32(SGE_TRM);
}
static int sil24_qc_defer(struct ata_queued_cmd *qc)
void __iomem *mmio = ap->host->iomap[PDC_MMIO_BAR];
void __iomem *dimm_mmio = ap->host->iomap[PDC_DIMM_BAR];
unsigned int portno = ap->port_no;
- unsigned int i, idx, total_len = 0, sgt_len;
+ unsigned int i, si, idx, total_len = 0, sgt_len;
u32 *buf = (u32 *) &pp->dimm_buf[PDC_DIMM_HEADER_SZ];
WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
* Build S/G table
*/
idx = 0;
- ata_for_each_sg(sg, qc) {
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
buf[idx++] = cpu_to_le32(sg_dma_address(sg));
buf[idx++] = cpu_to_le32(sg_dma_len(sg));
total_len += sg_dma_len(sg);
struct ipr_ioadl_desc *last_ioadl = NULL;
int len = qc->nbytes + qc->pad_len;
struct scatterlist *sg;
+ unsigned int si;
if (len == 0)
return;
cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
}
- ata_for_each_sg(sg, qc) {
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
ioadl->flags_and_data_len = cpu_to_be32(ioadl_flags | sg_dma_len(sg));
ioadl->address = cpu_to_be32(sg_dma_address(sg));
struct Scsi_Host *host = sas_ha->core.shost;
struct sas_internal *i = to_sas_internal(host->transportt);
struct scatterlist *sg;
- unsigned int num = 0;
unsigned int xfer = 0;
+ unsigned int si;
task = sas_alloc_task(GFP_ATOMIC);
if (!task)
task->total_xfer_len = qc->nbytes + qc->pad_len;
task->num_scatter = qc->pad_len ? qc->n_elem + 1 : qc->n_elem;
} else {
- ata_for_each_sg(sg, qc) {
- num++;
+ for_each_sg(qc->sg, sg, qc->n_elem, si)
xfer += sg->length;
- }
task->total_xfer_len = xfer;
- task->num_scatter = num;
+ task->num_scatter = si;
}
task->data_dir = qc->dma_dir;
- task->scatter = qc->__sg;
+ task->scatter = qc->sg;
task->ata_task.retry_count = 1;
task->task_state_flags = SAS_TASK_STATE_PENDING;
qc->lldd_task = task;
unsigned int tag;
unsigned int n_elem;
unsigned int n_iter;
- unsigned int orig_n_elem;
+ unsigned int mapped_n_elem;
int dma_dir;
struct scatterlist *cursg;
unsigned int cursg_ofs;
+ struct scatterlist *last_sg;
+ struct scatterlist saved_last_sg;
struct scatterlist sgent;
- struct scatterlist pad_sgent;
+ struct scatterlist extra_sg[2];
- /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
- struct scatterlist *__sg;
+ struct scatterlist *sg;
unsigned int err_mask;
struct ata_taskfile result_tf;
const char *name);
#endif
-/*
- * qc helpers
- */
-static inline struct scatterlist *
-ata_qc_first_sg(struct ata_queued_cmd *qc)
-{
- qc->n_iter = 0;
- if (qc->n_elem)
- return qc->__sg;
- if (qc->pad_len)
- return &qc->pad_sgent;
- return NULL;
-}
-
-static inline struct scatterlist *
-ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
-{
- if (sg == &qc->pad_sgent)
- return NULL;
- if (++qc->n_iter < qc->n_elem)
- return sg_next(sg);
- if (qc->pad_len)
- return &qc->pad_sgent;
- return NULL;
-}
-
-#define ata_for_each_sg(sg, qc) \
- for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
-
static inline unsigned int ata_tag_valid(unsigned int tag)
{
return (tag < ATA_MAX_QUEUE) ? 1 : 0;
static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
{
qc->dma_dir = DMA_NONE;
- qc->__sg = NULL;
+ qc->sg = NULL;
qc->flags = 0;
qc->cursg = NULL;
qc->cursg_ofs = 0;
qc->nbytes = qc->curbytes = 0;
qc->n_elem = 0;
+ qc->mapped_n_elem = 0;
qc->n_iter = 0;
qc->err_mask = 0;
qc->pad_len = 0;
+ qc->last_sg = NULL;
qc->sect_size = ATA_SECT_SIZE;
ata_tf_init(qc->dev, &qc->tf);
projects / linux-2.6 / commitdiff