7 files changed, 67 insertions, 16 deletions

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 9bf2986a2788..ae8494944c45 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -651,9 +651,17 @@ config PATA_WINBOND_VLB
           Support for the Winbond W83759A controller on Vesa Local Bus
           systems.
 
+config HAVE_PATA_PLATFORM
+        bool
+        help
+          This is an internal configuration node for any machine that
+          uses pata-platform driver to enable the relevant driver in the
+          configuration structure without having to submit endless patches
+          to update the PATA_PLATFORM entry.
+
 config PATA_PLATFORM
         tristate "Generic platform device PATA support"
-        depends on EMBEDDED || ARCH_RPC || PPC
+        depends on EMBEDDED || ARCH_RPC || PPC || HAVE_PATA_PLATFORM
         help
           This option enables support for generic directly connected ATA
           devices commonly found on embedded systems.
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 966ab401e523..6a4a2a25d97a 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -90,6 +90,7 @@ enum {
         board_ahci_mv           = 4,
         board_ahci_sb700        = 5,
         board_ahci_mcp65        = 6,
+        board_ahci_nopmp        = 7,
 
         /* global controller registers */
         HOST_CAP                = 0x00, /* host capabilities */
@@ -401,6 +402,14 @@ static const struct ata_port_info ahci_port_info[] = {
                 .udma_mask      = ATA_UDMA6,
                 .port_ops       = &ahci_ops,
         },
+        /* board_ahci_nopmp */
+        {
+                AHCI_HFLAGS     (AHCI_HFLAG_NO_PMP),
+                .flags          = AHCI_FLAG_COMMON,
+                .pio_mask       = 0x1f, /* pio0-4 */
+                .udma_mask      = ATA_UDMA6,
+                .port_ops       = &ahci_ops,
+        },
 };
 
 static const struct pci_device_id ahci_pci_tbl[] = {
@@ -525,9 +534,9 @@ static const struct pci_device_id ahci_pci_tbl[] = {
         { PCI_VDEVICE(NVIDIA, 0x0bc7), board_ahci },            /* MCP7B */
 
         /* SiS */
-        { PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */
-        { PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 966 */
-        { PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */
+        { PCI_VDEVICE(SI, 0x1184), board_ahci_nopmp },          /* SiS 966 */
+        { PCI_VDEVICE(SI, 0x1185), board_ahci_nopmp },          /* SiS 968 */
+        { PCI_VDEVICE(SI, 0x0186), board_ahci_nopmp },          /* SiS 968 */
 
         /* Marvell */
         { PCI_VDEVICE(MARVELL, 0x6145), board_ahci_mv },        /* 6145 */
@@ -653,6 +662,14 @@ static void ahci_save_initial_config(struct pci_dev *pdev,
                 cap &= ~HOST_CAP_PMP;
         }
 
+        if (pdev->vendor == PCI_VENDOR_ID_JMICRON && pdev->device == 0x2361 &&
+            port_map != 1) {
+                dev_printk(KERN_INFO, &pdev->dev,
+                           "JMB361 has only one port, port_map 0x%x -> 0x%x\n",
+                           port_map, 1);
+                port_map = 1;
+        }
+
         /*
          * Temporary Marvell 6145 hack: PATA port presence
          * is asserted through the standard AHCI port
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 81b7ae376951..a90ae03f56b2 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -1043,6 +1043,13 @@ static int piix_broken_suspend(void)
                         },
                 },
                 {
+                        .ident = "TECRA M4",
+                        .matches = {
+                                DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+                                DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M4"),
+                        },
+                },
+                {
                         .ident = "TECRA M5",
                         .matches = {
                                 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index cc816ca623d3..303fc0d2b978 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4297,7 +4297,7 @@ void ata_sg_clean(struct ata_queued_cmd *qc)
 }
 
 /**
- *      ata_check_atapi_dma - Check whether ATAPI DMA can be supported
+ *      atapi_check_dma - Check whether ATAPI DMA can be supported
  *      @qc: Metadata associated with taskfile to check
  *
  *      Allow low-level driver to filter ATA PACKET commands, returning
@@ -4310,7 +4310,7 @@ void ata_sg_clean(struct ata_queued_cmd *qc)
  *      RETURNS: 0 when ATAPI DMA can be used
  *               nonzero otherwise
  */
-int ata_check_atapi_dma(struct ata_queued_cmd *qc)
+int atapi_check_dma(struct ata_queued_cmd *qc)
 {
         struct ata_port *ap = qc->ap;
 
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 2e6e1622dc6d..57a43649a461 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2343,8 +2343,8 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
 {
         struct scsi_cmnd *scmd = qc->scsicmd;
         struct ata_device *dev = qc->dev;
-        int using_pio = (dev->flags & ATA_DFLAG_PIO);
         int nodata = (scmd->sc_data_direction == DMA_NONE);
+        int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
         unsigned int nbytes;
 
         memset(qc->cdb, 0, dev->cdb_len);
@@ -2362,7 +2362,7 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
         ata_qc_set_pc_nbytes(qc);
 
         /* check whether ATAPI DMA is safe */
-        if (!using_pio && ata_check_atapi_dma(qc))
+        if (!nodata && !using_pio && atapi_check_dma(qc))
                 using_pio = 1;
 
         /* Some controller variants snoop this value for Packet
@@ -2402,13 +2402,11 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
         qc->tf.lbam = (nbytes & 0xFF);
         qc->tf.lbah = (nbytes >> 8);
 
-        if (using_pio || nodata) {
-                /* no data, or PIO data xfer */
-                if (nodata)
-                        qc->tf.protocol = ATAPI_PROT_NODATA;
-                else
-                        qc->tf.protocol = ATAPI_PROT_PIO;
-        } else {
+        if (nodata)
+                qc->tf.protocol = ATAPI_PROT_NODATA;
+        else if (using_pio)
+                qc->tf.protocol = ATAPI_PROT_PIO;
+        else {
                 /* DMA data xfer */
                 qc->tf.protocol = ATAPI_PROT_DMA;
                 qc->tf.feature |= ATAPI_PKT_DMA;
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 4514283937ea..1cf803adbc95 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -106,7 +106,7 @@ extern void ata_sg_clean(struct ata_queued_cmd *qc);
 extern void ata_qc_free(struct ata_queued_cmd *qc);
 extern void ata_qc_issue(struct ata_queued_cmd *qc);
 extern void __ata_qc_complete(struct ata_queued_cmd *qc);
-extern int ata_check_atapi_dma(struct ata_queued_cmd *qc);
+extern int atapi_check_dma(struct ata_queued_cmd *qc);
 extern void swap_buf_le16(u16 *buf, unsigned int buf_words);
 extern void ata_dev_init(struct ata_device *dev);
 extern void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp);
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 60391e9a84db..28092bc50146 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -1322,6 +1322,9 @@ static int mv_port_start(struct ata_port *ap)
                 goto out_port_free_dma_mem;
         memset(pp->crpb, 0, MV_CRPB_Q_SZ);
 
+        /* 6041/6081 Rev. "C0" (and newer) are okay with async notify */
+        if (hpriv->hp_flags & MV_HP_ERRATA_60X1C0)
+                ap->flags |= ATA_FLAG_AN;
         /*
          * For GEN_I, there's no NCQ, so we only allocate a single sg_tbl.
          * For later hardware, we need one unique sg_tbl per NCQ tag.
@@ -1592,6 +1595,24 @@ static unsigned int mv_qc_issue(struct ata_queued_cmd *qc)
 
         if ((qc->tf.protocol != ATA_PROT_DMA) &&
             (qc->tf.protocol != ATA_PROT_NCQ)) {
+                static int limit_warnings = 10;
+                /*
+                 * Errata SATA#16, SATA#24: warn if multiple DRQs expected.
+                 *
+                 * Someday, we might implement special polling workarounds
+                 * for these, but it all seems rather unnecessary since we
+                 * normally use only DMA for commands which transfer more
+                 * than a single block of data.
+                 *
+                 * Much of the time, this could just work regardless.
+                 * So for now, just log the incident, and allow the attempt.
+                 */
+                if (limit_warnings && (qc->nbytes / qc->sect_size) > 1) {
+                        --limit_warnings;
+                        ata_link_printk(qc->dev->link, KERN_WARNING, DRV_NAME
+                                        ": attempting PIO w/multiple DRQ: "
+                                        "this may fail due to h/w errata\n");
+                }
                 /*
                  * We're about to send a non-EDMA capable command to the
                  * port.  Turn off EDMA so there won't be problems accessing