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] pata_it821x: fix warning
  libata: Fix a large collection of DMA mode mismatches
  ahci: sis controllers actually can do PMP
  pata_via: clean up recent tf_load changes
  libata: restore SControl on detach
  libata: use ata_link_printk() when printing SError
  libata: always do follow-up SRST if hardreset returned -EAGAIN
  libata: fix EH action overwriting in ata_eh_reset()
  sata_mv: add the Gen IIE flag to the SoC devices.
  ata_piix: IDE Mode SATA patch for Intel Ibex Peak DeviceIDs
  ahci: RAID mode SATA patch for Intel Ibex Peak DeviceIDs
  sata_mv: don't issue two DMA commands concurrently
  libata: implement no[hs]rst force params

14 files changed, 123 insertions, 126 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index a8976467a983..1150444a21ab 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1074,6 +1074,9 @@ and is between 256 and 4096 characters. It is defined in the file
 
                         * [no]ncq: Turn on or off NCQ.
 
+                        * nohrst, nosrst, norst: suppress hard, soft
+                          and both resets.
+
                         If there are multiple matching configurations changing
                         the same attribute, the last one is used.
 
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index ef3e5522e1a4..c729e6988bbb 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -486,6 +486,8 @@ static const struct pci_device_id ahci_pci_tbl[] = {
         { PCI_VDEVICE(INTEL, 0x502b), board_ahci }, /* Tolapai */
         { PCI_VDEVICE(INTEL, 0x3a05), board_ahci }, /* ICH10 */
         { PCI_VDEVICE(INTEL, 0x3a25), board_ahci }, /* ICH10 */
+        { PCI_VDEVICE(INTEL, 0x3b24), board_ahci }, /* PCH RAID */
+        { PCI_VDEVICE(INTEL, 0x3b2b), board_ahci }, /* PCH RAID */
 
         /* JMicron 360/1/3/5/6, match class to avoid IDE function */
         { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
@@ -575,9 +577,9 @@ static const struct pci_device_id ahci_pci_tbl[] = {
         { PCI_VDEVICE(NVIDIA, 0x0bc7), board_ahci },            /* MCP7B */
 
         /* SiS */
-        { 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 */
+        { PCI_VDEVICE(SI, 0x1184), board_ahci },                /* SiS 966 */
+        { PCI_VDEVICE(SI, 0x1185), board_ahci },                /* SiS 968 */
+        { PCI_VDEVICE(SI, 0x0186), board_ahci },                /* SiS 968 */
 
         /* Marvell */
         { PCI_VDEVICE(MARVELL, 0x6145), board_ahci_mv },        /* 6145 */
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index c294121fd69e..b1d08a8f5003 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -275,6 +275,14 @@ static const struct pci_device_id piix_pci_tbl[] = {
         { 0x8086, 0x3a20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
         /* SATA Controller IDE (ICH10) */
         { 0x8086, 0x3a26, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+        /* SATA Controller IDE (PCH) */
+        { 0x8086, 0x3b20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
+        /* SATA Controller IDE (PCH) */
+        { 0x8086, 0x3b26, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+        /* SATA Controller IDE (PCH) */
+        { 0x8086, 0x3b2d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+        /* SATA Controller IDE (PCH) */
+        { 0x8086, 0x3b2e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
 
         { }     /* terminate list */
 };
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 5ba96c5052c8..79e3a8e7a84a 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -104,6 +104,7 @@ struct ata_force_param {
         unsigned long   xfer_mask;
         unsigned int    horkage_on;
         unsigned int    horkage_off;
+        unsigned int    lflags;
 };
 
 struct ata_force_ent {
@@ -196,22 +197,23 @@ void ata_force_cbl(struct ata_port *ap)
 }
 
 /**
- *      ata_force_spd_limit - force SATA spd limit according to libata.force
+ *      ata_force_link_limits - force link limits according to libata.force
  *      @link: ATA link of interest
  *
- *      Force SATA spd limit according to libata.force and whine about
- *      it.  When only the port part is specified (e.g. 1:), the limit
- *      applies to all links connected to both the host link and all
- *      fan-out ports connected via PMP.  If the device part is
- *      specified as 0 (e.g. 1.00:), it specifies the first fan-out
- *      link not the host link.  Device number 15 always points to the
- *      host link whether PMP is attached or not.
+ *      Force link flags and SATA spd limit according to libata.force
+ *      and whine about it.  When only the port part is specified
+ *      (e.g. 1:), the limit applies to all links connected to both
+ *      the host link and all fan-out ports connected via PMP.  If the
+ *      device part is specified as 0 (e.g. 1.00:), it specifies the
+ *      first fan-out link not the host link.  Device number 15 always
+ *      points to the host link whether PMP is attached or not.
  *
  *      LOCKING:
  *      EH context.
  */
-static void ata_force_spd_limit(struct ata_link *link)
+static void ata_force_link_limits(struct ata_link *link)
 {
+        bool did_spd = false;
         int linkno, i;
 
         if (ata_is_host_link(link))
@@ -228,13 +230,22 @@ static void ata_force_spd_limit(struct ata_link *link)
                 if (fe->device != -1 && fe->device != linkno)
                         continue;
 
-                if (!fe->param.spd_limit)
-                        continue;
+                /* only honor the first spd limit */
+                if (!did_spd && fe->param.spd_limit) {
+                        link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
+                        ata_link_printk(link, KERN_NOTICE,
+                                        "FORCE: PHY spd limit set to %s\n",
+                                        fe->param.name);
+                        did_spd = true;
+                }
 
-                link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
-                ata_link_printk(link, KERN_NOTICE,
-                        "FORCE: PHY spd limit set to %s\n", fe->param.name);
-                return;
+                /* let lflags stack */
+                if (fe->param.lflags) {
+                        link->flags |= fe->param.lflags;
+                        ata_link_printk(link, KERN_NOTICE,
+                                        "FORCE: link flag 0x%x forced -> 0x%x\n",
+                                        fe->param.lflags, link->flags);
+                }
         }
 }
 
@@ -3277,7 +3288,7 @@ int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
                 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
 
                 found = 1;
-                if (dev->dma_mode != 0xff)
+                if (ata_dma_enabled(dev))
                         used_dma = 1;
         }
         if (!found)
@@ -3302,7 +3313,7 @@ int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
 
         /* step 3: set host DMA timings */
         ata_link_for_each_dev(dev, link) {
-                if (!ata_dev_enabled(dev) || dev->dma_mode == 0xff)
+                if (!ata_dev_enabled(dev) || !ata_dma_enabled(dev))
                         continue;
 
                 dev->xfer_mode = dev->dma_mode;
@@ -5188,19 +5199,18 @@ void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
  */
 int sata_link_init_spd(struct ata_link *link)
 {
-        u32 scontrol;
         u8 spd;
         int rc;
 
-        rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
+        rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
         if (rc)
                 return rc;
 
-        spd = (scontrol >> 4) & 0xf;
+        spd = (link->saved_scontrol >> 4) & 0xf;
         if (spd)
                 link->hw_sata_spd_limit &= (1 << spd) - 1;
 
-        ata_force_spd_limit(link);
+        ata_force_link_limits(link);
 
         link->sata_spd_limit = link->hw_sata_spd_limit;
 
@@ -5783,9 +5793,10 @@ static void ata_port_detach(struct ata_port *ap)
         ata_port_wait_eh(ap);
 
         /* EH is now guaranteed to see UNLOADING - EH context belongs
-         * to us.  Disable all existing devices.
+         * to us.  Restore SControl and disable all existing devices.
          */
-        ata_port_for_each_link(link, ap) {
+        __ata_port_for_each_link(link, ap) {
+                sata_scr_write(link, SCR_CONTROL, link->saved_scontrol);
                 ata_link_for_each_dev(dev, link)
                         ata_dev_disable(dev);
         }
@@ -5991,6 +6002,9 @@ static int __init ata_parse_force_one(char **cur,
                 { "udma133",    .xfer_mask      = 1 << (ATA_SHIFT_UDMA + 6) },
                 { "udma/133",   .xfer_mask      = 1 << (ATA_SHIFT_UDMA + 6) },
                 { "udma7",      .xfer_mask      = 1 << (ATA_SHIFT_UDMA + 7) },
+                { "nohrst",     .lflags         = ATA_LFLAG_NO_HRST },
+                { "nosrst",     .lflags         = ATA_LFLAG_NO_SRST },
+                { "norst",      .lflags         = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
         };
         char *start = *cur, *p = *cur;
         char *id, *val, *endp;
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 58bdc538d229..c1db2f234d2e 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2040,7 +2040,7 @@ static void ata_eh_link_report(struct ata_link *link)
         }
 
         if (ehc->i.serror)
-                ata_port_printk(ap, KERN_ERR,
+                ata_link_printk(link, KERN_ERR,
                   "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n",
                   ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "",
                   ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "",
@@ -2171,18 +2171,12 @@ static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset,
 }
 
 static int ata_eh_followup_srst_needed(struct ata_link *link,
-                                       int rc, int classify,
-                                       const unsigned int *classes)
+                                       int rc, const unsigned int *classes)
 {
         if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link))
                 return 0;
-        if (rc == -EAGAIN) {
-                if (classify)
-                        return 1;
-                rc = 0;
-        }
-        if (rc != 0)
-                return 0;
+        if (rc == -EAGAIN)
+                return 1;
         if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
                 return 1;
         return 0;
@@ -2210,6 +2204,10 @@ int ata_eh_reset(struct ata_link *link, int classify,
          */
         while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX)
                 max_tries++;
+        if (link->flags & ATA_LFLAG_NO_HRST)
+                hardreset = NULL;
+        if (link->flags & ATA_LFLAG_NO_SRST)
+                softreset = NULL;
 
         now = jiffies;
         deadline = ata_deadline(ehc->last_reset, ATA_EH_RESET_COOL_DOWN);
@@ -2247,10 +2245,10 @@ int ata_eh_reset(struct ata_link *link, int classify,
         ehc->i.action &= ~ATA_EH_RESET;
         if (hardreset) {
                 reset = hardreset;
-                ehc->i.action = ATA_EH_HARDRESET;
+                ehc->i.action |= ATA_EH_HARDRESET;
         } else if (softreset) {
                 reset = softreset;
-                ehc->i.action = ATA_EH_SOFTRESET;
+                ehc->i.action |= ATA_EH_SOFTRESET;
         }
 
         if (prereset) {
@@ -2305,9 +2303,11 @@ int ata_eh_reset(struct ata_link *link, int classify,
                         ehc->i.flags |= ATA_EHI_DID_SOFTRESET;
 
                 rc = ata_do_reset(link, reset, classes, deadline);
+                if (rc && rc != -EAGAIN)
+                        goto fail;
 
                 if (reset == hardreset &&
-                    ata_eh_followup_srst_needed(link, rc, classify, classes)) {
+                    ata_eh_followup_srst_needed(link, rc, classes)) {
                         /* okay, let's do follow-up softreset */
                         reset = softreset;
 
@@ -2322,10 +2322,6 @@ int ata_eh_reset(struct ata_link *link, int classify,
                         ata_eh_about_to_do(link, NULL, ATA_EH_RESET);
                         rc = ata_do_reset(link, reset, classes, deadline);
                 }
-
-                /* -EAGAIN can happen if we skipped followup SRST */
-                if (rc && rc != -EAGAIN)
-                        goto fail;
         } else {
                 if (verbose)
                         ata_link_printk(link, KERN_INFO, "no reset method "
diff --git a/drivers/ata/pata_acpi.c b/drivers/ata/pata_acpi.c
index fbe605711554..eb919c16a03e 100644
--- a/drivers/ata/pata_acpi.c
+++ b/drivers/ata/pata_acpi.c
@@ -181,7 +181,7 @@ static unsigned int pacpi_qc_issue(struct ata_queued_cmd *qc)
 
         if (adev != acpi->last) {
                 pacpi_set_piomode(ap, adev);
-                if (adev->dma_mode)
+                if (ata_dma_enabled(adev))
                         pacpi_set_dmamode(ap, adev);
                 acpi->last = adev;
         }
diff --git a/drivers/ata/pata_atiixp.c b/drivers/ata/pata_atiixp.c
index d7de7baf58a8..e8a0d99d7356 100644
--- a/drivers/ata/pata_atiixp.c
+++ b/drivers/ata/pata_atiixp.c
@@ -183,7 +183,7 @@ static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
         u16 tmp16;
 
         pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
-        if (adev->dma_mode >= XFER_UDMA_0)
+        if (ata_using_udma(adev))
                 tmp16 |= (1 << dn);
         else
                 tmp16 &= ~(1 << dn);
diff --git a/drivers/ata/pata_cs5530.c b/drivers/ata/pata_cs5530.c
index 744beebaaf49..0c4b271a9d5a 100644
--- a/drivers/ata/pata_cs5530.c
+++ b/drivers/ata/pata_cs5530.c
@@ -149,10 +149,10 @@ static unsigned int cs5530_qc_issue(struct ata_queued_cmd *qc)
         struct ata_device *prev = ap->private_data;
 
         /* See if the DMA settings could be wrong */
-        if (adev->dma_mode != 0 && adev != prev && prev != NULL) {
+        if (ata_dma_enabled(adev) && adev != prev && prev != NULL) {
                 /* Maybe, but do the channels match MWDMA/UDMA ? */
-                if ((adev->dma_mode >= XFER_UDMA_0 && prev->dma_mode < XFER_UDMA_0) ||
-                    (adev->dma_mode < XFER_UDMA_0 && prev->dma_mode >= XFER_UDMA_0))
+                if ((ata_using_udma(adev) && !ata_using_udma(prev)) ||
+                    (ata_using_udma(prev) && !ata_using_udma(adev)))
                         /* Switch the mode bits */
                         cs5530_set_dmamode(ap, adev);
         }
diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index 27843c70eb9d..0221c9a46769 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -606,7 +606,7 @@ static void it821x_display_disk(int n, u8 *buf)
 {
         unsigned char id[41];
         int mode = 0;
-        char *mtype;
+        char *mtype = "";
         char mbuf[8];
         char *cbl = "(40 wire cable)";
 
diff --git a/drivers/ata/pata_oldpiix.c b/drivers/ata/pata_oldpiix.c
index e678af383d13..df64f2443001 100644
--- a/drivers/ata/pata_oldpiix.c
+++ b/drivers/ata/pata_oldpiix.c
@@ -198,7 +198,7 @@ static unsigned int oldpiix_qc_issue(struct ata_queued_cmd *qc)
 
         if (adev != ap->private_data) {
                 oldpiix_set_piomode(ap, adev);
-                if (adev->dma_mode)
+                if (ata_dma_enabled(adev))
                         oldpiix_set_dmamode(ap, adev);
         }
         return ata_sff_qc_issue(qc);
diff --git a/drivers/ata/pata_sc1200.c b/drivers/ata/pata_sc1200.c
index cbab397e3db7..0278fd2b8fb1 100644
--- a/drivers/ata/pata_sc1200.c
+++ b/drivers/ata/pata_sc1200.c
@@ -167,10 +167,10 @@ static unsigned int sc1200_qc_issue(struct ata_queued_cmd *qc)
         struct ata_device *prev = ap->private_data;
 
         /* See if the DMA settings could be wrong */
-        if (adev->dma_mode != 0 && adev != prev && prev != NULL) {
+        if (ata_dma_enabled(adev) && adev != prev && prev != NULL) {
                 /* Maybe, but do the channels match MWDMA/UDMA ? */
-                if ((adev->dma_mode >= XFER_UDMA_0 && prev->dma_mode < XFER_UDMA_0) ||
-                    (adev->dma_mode < XFER_UDMA_0 && prev->dma_mode >= XFER_UDMA_0))
+                if ((ata_using_udma(adev) && !ata_using_udma(prev)) ||
+                    (ata_using_udma(prev) && !ata_using_udma(adev)))
                         /* Switch the mode bits */
                         sc1200_set_dmamode(ap, adev);
         }
diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index 57d951b11f2d..8fdb2ce73210 100644
--- a/drivers/ata/pata_via.c
+++ b/drivers/ata/pata_via.c
@@ -324,62 +324,26 @@ static void via_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 }
 
 /**
- *      via_ata_sff_tf_load - send taskfile registers to host controller
+ *      via_tf_load - send taskfile registers to host controller
  *      @ap: Port to which output is sent
  *      @tf: ATA taskfile register set
  *
  *      Outputs ATA taskfile to standard ATA host controller.
  *
  *      Note: This is to fix the internal bug of via chipsets, which
- *  will reset the device register after changing the IEN bit on
- *  ctl register
+ *      will reset the device register after changing the IEN bit on
+ *      ctl register
  */
-static void via_ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
+static void via_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
 {
-        struct ata_ioports *ioaddr = &ap->ioaddr;
-        unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
-
-        if (tf->ctl != ap->last_ctl) {
-                iowrite8(tf->ctl, ioaddr->ctl_addr);
-                iowrite8(tf->device, ioaddr->device_addr);
-                ap->last_ctl = tf->ctl;
-                ata_wait_idle(ap);
-        }
-
-        if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
-                iowrite8(tf->hob_feature, ioaddr->feature_addr);
-                iowrite8(tf->hob_nsect, ioaddr->nsect_addr);
-                iowrite8(tf->hob_lbal, ioaddr->lbal_addr);
-                iowrite8(tf->hob_lbam, ioaddr->lbam_addr);
-                iowrite8(tf->hob_lbah, ioaddr->lbah_addr);
-                VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
-                        tf->hob_feature,
-                        tf->hob_nsect,
-                        tf->hob_lbal,
-                        tf->hob_lbam,
-                        tf->hob_lbah);
-        }
+        struct ata_taskfile tmp_tf;
 
-        if (is_addr) {
-                iowrite8(tf->feature, ioaddr->feature_addr);
-                iowrite8(tf->nsect, ioaddr->nsect_addr);
-                iowrite8(tf->lbal, ioaddr->lbal_addr);
-                iowrite8(tf->lbam, ioaddr->lbam_addr);
-                iowrite8(tf->lbah, ioaddr->lbah_addr);
-                VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
-                        tf->feature,
-                        tf->nsect,
-                        tf->lbal,
-                        tf->lbam,
-                        tf->lbah);
+        if (ap->ctl != ap->last_ctl && !(tf->flags & ATA_TFLAG_DEVICE)) {
+                tmp_tf = *tf;
+                tmp_tf.flags |= ATA_TFLAG_DEVICE;
+                tf = &tmp_tf;
         }
-
-        if (tf->flags & ATA_TFLAG_DEVICE) {
-                iowrite8(tf->device, ioaddr->device_addr);
-                VPRINTK("device 0x%X\n", tf->device);
-        }
-
-        ata_wait_idle(ap);
+        ata_sff_tf_load(ap, tf);
 }
 
 static struct scsi_host_template via_sht = {
@@ -392,13 +356,12 @@ static struct ata_port_operations via_port_ops = {
         .set_piomode    = via_set_piomode,
         .set_dmamode    = via_set_dmamode,
         .prereset       = via_pre_reset,
-        .sff_tf_load = via_ata_tf_load,
+        .sff_tf_load    = via_tf_load,
 };
 
 static struct ata_port_operations via_port_ops_noirq = {
         .inherits       = &via_port_ops,
         .sff_data_xfer  = ata_sff_data_xfer_noirq,
-        .sff_tf_load = via_ata_tf_load,
 };
 
 /**
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index ad169ffbc4cb..13c1d2af18ac 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -1134,30 +1134,16 @@ static int mv_qc_defer(struct ata_queued_cmd *qc)
         if (ap->nr_active_links == 0)
                 return 0;
 
-        if (pp->pp_flags & MV_PP_FLAG_EDMA_EN) {
-                /*
-                 * The port is operating in host queuing mode (EDMA).
-                 * It can accomodate a new qc if the qc protocol
-                 * is compatible with the current host queue mode.
-                 */
-                if (pp->pp_flags & MV_PP_FLAG_NCQ_EN) {
-                        /*
-                         * The host queue (EDMA) is in NCQ mode.
-                         * If the new qc is also an NCQ command,
-                         * then allow the new qc.
-                         */
-                        if (qc->tf.protocol == ATA_PROT_NCQ)
-                                return 0;
-                } else {
-                        /*
-                         * The host queue (EDMA) is in non-NCQ, DMA mode.
-                         * If the new qc is also a non-NCQ, DMA command,
-                         * then allow the new qc.
-                         */
-                        if (qc->tf.protocol == ATA_PROT_DMA)
-                                return 0;
-                }
-        }
+        /*
+         * The port is operating in host queuing mode (EDMA) with NCQ
+         * enabled, allow multiple NCQ commands.  EDMA also allows
+         * queueing multiple DMA commands but libata core currently
+         * doesn't allow it.
+         */
+        if ((pp->pp_flags & MV_PP_FLAG_EDMA_EN) &&
+            (pp->pp_flags & MV_PP_FLAG_NCQ_EN) && ata_is_ncq(qc->tf.protocol))
+                return 0;
+
         return ATA_DEFER_PORT;
 }
 
@@ -3036,7 +3022,8 @@ static int mv_chip_id(struct ata_host *host, unsigned int board_idx)
                 break;
         case chip_soc:
                 hpriv->ops = &mv_soc_ops;
-                hp_flags |= MV_HP_FLAG_SOC | MV_HP_ERRATA_60X1C0;
+                hp_flags |= MV_HP_FLAG_SOC | MV_HP_GEN_IIE |
+                        MV_HP_ERRATA_60X1C0;
                 break;
 
         default:
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 06b80337303b..225bfc5bd9ec 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -163,6 +163,7 @@ enum {
         ATA_DEV_NONE            = 9,    /* no device */
 
         /* struct ata_link flags */
+        ATA_LFLAG_NO_HRST       = (1 << 1), /* avoid hardreset */
         ATA_LFLAG_NO_SRST       = (1 << 2), /* avoid softreset */
         ATA_LFLAG_ASSUME_ATA    = (1 << 3), /* assume ATA class */
         ATA_LFLAG_ASSUME_SEMB   = (1 << 4), /* assume SEMB class */
@@ -646,6 +647,7 @@ struct ata_link {
 
         unsigned int            flags;          /* ATA_LFLAG_xxx */
 
+        u32                     saved_scontrol; /* SControl on probe */
         unsigned int            hw_sata_spd_limit;
         unsigned int            sata_spd_limit;
         unsigned int            sata_spd;       /* current SATA PHY speed */
@@ -1427,6 +1429,28 @@ static inline unsigned long ata_deadline(unsigned long from_jiffies,
         return from_jiffies + msecs_to_jiffies(timeout_msecs);
 }
 
+/* Don't open code these in drivers as there are traps. Firstly the range may
+   change in future hardware and specs, secondly 0xFF means 'no DMA' but is
+   > UDMA_0. Dyma ddreigiau */
+
+static inline int ata_using_mwdma(struct ata_device *adev)
+{
+        if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
+                return 1;
+        return 0;
+}
+
+static inline int ata_using_udma(struct ata_device *adev)
+{
+        if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
+                return 1;
+        return 0;
+}
+
+static inline int ata_dma_enabled(struct ata_device *adev)
+{
+        return (adev->dma_mode == 0xFF ? 0 : 1);
+}
 
 /**************************************************************************
  * PMP - drivers/ata/libata-pmp.c