Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  libata: implement and use ATA_QCFLAG_QUIET
  libata: stop being overjealous about non-IO commands
  libata: flush is an IO command
  sata_promise: cleanups
  sata_promise: ASIC PRD table bug workaround, take 2

1 files changed, 92 insertions, 12 deletions

diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c
index deb26f04f2d..825e717bcef 100644
--- a/drivers/ata/sata_promise.c
+++ b/drivers/ata/sata_promise.c
@@ -2,6 +2,7 @@
  *  sata_promise.c - Promise SATA
  *
  *  Maintained by:  Jeff Garzik <jgarzik@pobox.com>
+ *		    Mikael Pettersson <mikpe@it.uu.se>
  *  		    Please ALWAYS copy linux-ide@vger.kernel.org
  *		    on emails.
  *
@@ -45,11 +46,12 @@
 #include "sata_promise.h"
 
 #define DRV_NAME	"sata_promise"
-#define DRV_VERSION	"2.10"
+#define DRV_VERSION	"2.11"
 
 enum {
 	PDC_MAX_PORTS		= 4,
 	PDC_MMIO_BAR		= 3,
+	PDC_MAX_PRD		= LIBATA_MAX_PRD - 1, /* -1 for ASIC PRD bug workaround */
 
 	/* register offsets */
 	PDC_FEATURE		= 0x04, /* Feature/Error reg (per port) */
@@ -157,7 +159,7 @@ static struct scsi_host_template pdc_ata_sht = {
 	.queuecommand		= ata_scsi_queuecmd,
 	.can_queue		= ATA_DEF_QUEUE,
 	.this_id		= ATA_SHT_THIS_ID,
-	.sg_tablesize		= LIBATA_MAX_PRD,
+	.sg_tablesize		= PDC_MAX_PRD,
 	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
 	.emulated		= ATA_SHT_EMULATED,
 	.use_clustering		= ATA_SHT_USE_CLUSTERING,
@@ -240,7 +242,7 @@ static const struct ata_port_operations pdc_pata_ops = {
 };
 
 static const struct ata_port_info pdc_port_info[] = {
-	/* board_2037x */
+	[board_2037x] =
 	{
 		.flags		= PDC_COMMON_FLAGS | ATA_FLAG_SATA |
 				  PDC_FLAG_SATA_PATA,
@@ -250,7 +252,7 @@ static const struct ata_port_info pdc_port_info[] = {
 		.port_ops	= &pdc_old_sata_ops,
 	},
 
-	/* board_2037x_pata */
+	[board_2037x_pata] =
 	{
 		.flags		= PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS,
 		.pio_mask	= 0x1f, /* pio0-4 */
@@ -259,7 +261,7 @@ static const struct ata_port_info pdc_port_info[] = {
 		.port_ops	= &pdc_pata_ops,
 	},
 
-	/* board_20319 */
+	[board_20319] =
 	{
 		.flags		= PDC_COMMON_FLAGS | ATA_FLAG_SATA |
 				  PDC_FLAG_4_PORTS,
@@ -269,7 +271,7 @@ static const struct ata_port_info pdc_port_info[] = {
 		.port_ops	= &pdc_old_sata_ops,
 	},
 
-	/* board_20619 */
+	[board_20619] =
 	{
 		.flags		= PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS |
 				  PDC_FLAG_4_PORTS,
@@ -279,7 +281,7 @@ static const struct ata_port_info pdc_port_info[] = {
 		.port_ops	= &pdc_pata_ops,
 	},
 
-	/* board_2057x */
+	[board_2057x] =
 	{
 		.flags		= PDC_COMMON_FLAGS | ATA_FLAG_SATA |
 				  PDC_FLAG_GEN_II | PDC_FLAG_SATA_PATA,
@@ -289,7 +291,7 @@ static const struct ata_port_info pdc_port_info[] = {
 		.port_ops	= &pdc_sata_ops,
 	},
 
-	/* board_2057x_pata */
+	[board_2057x_pata] =
 	{
 		.flags		= PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS |
 				  PDC_FLAG_GEN_II,
@@ -299,7 +301,7 @@ static const struct ata_port_info pdc_port_info[] = {
 		.port_ops	= &pdc_pata_ops,
 	},
 
-	/* board_40518 */
+	[board_40518] =
 	{
 		.flags		= PDC_COMMON_FLAGS | ATA_FLAG_SATA |
 				  PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS,
@@ -523,6 +525,84 @@ static void pdc_atapi_pkt(struct ata_queued_cmd *qc)
 	memcpy(buf+31, cdb, cdb_len);
 }
 
+/**
+ *	pdc_fill_sg - Fill PCI IDE PRD table
+ *	@qc: Metadata associated with taskfile to be transferred
+ *
+ *	Fill PCI IDE PRD (scatter-gather) table with segments
+ *	associated with the current disk command.
+ *	Make sure hardware does not choke on it.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host lock)
+ *
+ */
+static void pdc_fill_sg(struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	struct scatterlist *sg;
+	unsigned int idx;
+	const u32 SG_COUNT_ASIC_BUG = 41*4;
+
+	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) {
+		u32 addr, offset;
+		u32 sg_len, len;
+
+		/* determine if physical DMA addr spans 64K boundary.
+		 * Note h/w doesn't support 64-bit, so we unconditionally
+		 * truncate dma_addr_t to u32.
+		 */
+		addr = (u32) sg_dma_address(sg);
+		sg_len = sg_dma_len(sg);
+
+		while (sg_len) {
+			offset = addr & 0xffff;
+			len = sg_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);
+
+			idx++;
+			sg_len -= len;
+			addr += len;
+		}
+	}
+
+	if (idx) {
+		u32 len = le32_to_cpu(ap->prd[idx - 1].flags_len);
+
+		if (len > SG_COUNT_ASIC_BUG) {
+			u32 addr;
+
+			VPRINTK("Splitting last PRD.\n");
+
+			addr = le32_to_cpu(ap->prd[idx - 1].addr);
+			ap->prd[idx - 1].flags_len -= cpu_to_le32(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);
+
+			idx++;
+		}
+
+		ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
+	}
+}
+
 static void pdc_qc_prep(struct ata_queued_cmd *qc)
 {
 	struct pdc_port_priv *pp = qc->ap->private_data;
@@ -532,7 +612,7 @@ static void pdc_qc_prep(struct ata_queued_cmd *qc)
 
 	switch (qc->tf.protocol) {
 	case ATA_PROT_DMA:
-		ata_qc_prep(qc);
+		pdc_fill_sg(qc);
 		/* fall through */
 
 	case ATA_PROT_NODATA:
@@ -548,11 +628,11 @@ static void pdc_qc_prep(struct ata_queued_cmd *qc)
 		break;
 
 	case ATA_PROT_ATAPI:
-		ata_qc_prep(qc);
+		pdc_fill_sg(qc);
 		break;
 
 	case ATA_PROT_ATAPI_DMA:
-		ata_qc_prep(qc);
+		pdc_fill_sg(qc);
 		/*FALLTHROUGH*/
 	case ATA_PROT_ATAPI_NODATA:
 		pdc_atapi_pkt(qc);