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authorLinus Torvalds <torvalds@linux-foundation.org>2008-10-10 10:46:45 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-10 10:46:45 -0400
commit82219fceeb654789a9dd7cd3c6cce12dbf659342 (patch)
treed00570c185471efd2c53ceae5d6e509db0603cf8
parent3fa8749e584b55f1180411ab1b51117190bac1e5 (diff)
parent0395e61babd59c749fb5efe112affbfaa7d50eb7 (diff)
Merge branch 'upstream-2.6.28' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'upstream-2.6.28' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: ata_piix: IDE Mode SATA patch for Intel Ibex Peak DeviceIDs libata-eh: clear UNIT ATTENTION after reset ata_piix: add Hercules EC-900 mini-notebook to ich_laptop short cable list libata: reorder ata_device to remove 8 bytes of padding on 64 bits [libata] pata_bf54x: Add proper PM operation pata_sil680: convert CONFIG_PPC_MERGE to CONFIG_PPC libata: Implement disk shock protection support [libata] Introduce ata_id_has_unload() PATA: RPC now selects HAVE_PATA_PLATFORM for pata platform driver ata_piix: drop merged SCR access and use slave_link instead libata: implement slave_link libata: misc updates to prepare for slave link libata: reimplement link iterator libata: make SCR access ops per-link
Diffstat
-rw-r--r--drivers/ata/Kconfig2
-rw-r--r--drivers/ata/ahci.c25
-rw-r--r--drivers/ata/ata_piix.c184
-rw-r--r--drivers/ata/libata-core.c252
-rw-r--r--drivers/ata/libata-eh.c362
-rw-r--r--drivers/ata/libata-scsi.c108
-rw-r--r--drivers/ata/libata.h3
-rw-r--r--drivers/ata/pata_bf54x.c34
-rw-r--r--drivers/ata/pata_sil680.c2
-rw-r--r--drivers/ata/sata_fsl.c26
-rw-r--r--drivers/ata/sata_inic162x.c8
-rw-r--r--drivers/ata/sata_mv.c28
-rw-r--r--drivers/ata/sata_nv.c16
-rw-r--r--drivers/ata/sata_promise.c16
-rw-r--r--drivers/ata/sata_qstor.c12
-rw-r--r--drivers/ata/sata_sil.c16
-rw-r--r--drivers/ata/sata_sil24.c12
-rw-r--r--drivers/ata/sata_sis.c28
-rw-r--r--drivers/ata/sata_svw.c10
-rw-r--r--drivers/ata/sata_uli.c24
-rw-r--r--drivers/ata/sata_via.c24
-rw-r--r--drivers/ata/sata_vsc.c10
-rw-r--r--drivers/scsi/libsas/sas_ata.c8
-rw-r--r--include/linux/ata.h9
-rw-r--r--include/linux/libata.h66
25 files changed, 923 insertions, 362 deletions
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 11c8c19f0fb7..f17cd4b572f8 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -663,7 +663,7 @@ config HAVE_PATA_PLATFORM
663 663
664config PATA_PLATFORM 664config PATA_PLATFORM
665 tristate "Generic platform device PATA support" 665 tristate "Generic platform device PATA support"
666 depends on EMBEDDED || ARCH_RPC || PPC || HAVE_PATA_PLATFORM 666 depends on EMBEDDED || PPC || HAVE_PATA_PLATFORM
667 help 667 help
668 This option enables support for generic directly connected ATA 668 This option enables support for generic directly connected ATA
669 devices commonly found on embedded systems. 669 devices commonly found on embedded systems.
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 2e1a7cb2ed5f..aeadd00411a1 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -267,8 +267,8 @@ struct ahci_port_priv {
267 * per PM slot */ 267 * per PM slot */
268}; 268};
269 269
270static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val); 270static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
271static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val); 271static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
272static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); 272static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
273static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc); 273static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
274static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc); 274static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc);
@@ -316,6 +316,7 @@ static struct device_attribute *ahci_shost_attrs[] = {
316 316
317static struct device_attribute *ahci_sdev_attrs[] = { 317static struct device_attribute *ahci_sdev_attrs[] = {
318 &dev_attr_sw_activity, 318 &dev_attr_sw_activity,
319 &dev_attr_unload_heads,
319 NULL 320 NULL
320}; 321};
321 322
@@ -820,10 +821,10 @@ static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg)
820 return 0; 821 return 0;
821} 822}
822 823
823static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) 824static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
824{ 825{
825 void __iomem *port_mmio = ahci_port_base(ap); 826 void __iomem *port_mmio = ahci_port_base(link->ap);
826 int offset = ahci_scr_offset(ap, sc_reg); 827 int offset = ahci_scr_offset(link->ap, sc_reg);
827 828
828 if (offset) { 829 if (offset) {
829 *val = readl(port_mmio + offset); 830 *val = readl(port_mmio + offset);
@@ -832,10 +833,10 @@ static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
832 return -EINVAL; 833 return -EINVAL;
833} 834}
834 835
835static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) 836static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
836{ 837{
837 void __iomem *port_mmio = ahci_port_base(ap); 838 void __iomem *port_mmio = ahci_port_base(link->ap);
838 int offset = ahci_scr_offset(ap, sc_reg); 839 int offset = ahci_scr_offset(link->ap, sc_reg);
839 840
840 if (offset) { 841 if (offset) {
841 writel(val, port_mmio + offset); 842 writel(val, port_mmio + offset);
@@ -973,7 +974,7 @@ static void ahci_disable_alpm(struct ata_port *ap)
973 writel(PORT_IRQ_PHYRDY, port_mmio + PORT_IRQ_STAT); 974 writel(PORT_IRQ_PHYRDY, port_mmio + PORT_IRQ_STAT);
974 975
975 /* go ahead and clean out PhyRdy Change from Serror too */ 976 /* go ahead and clean out PhyRdy Change from Serror too */
976 ahci_scr_write(ap, SCR_ERROR, ((1 << 16) | (1 << 18))); 977 ahci_scr_write(&ap->link, SCR_ERROR, ((1 << 16) | (1 << 18)));
977 978
978 /* 979 /*
979 * Clear flag to indicate that we should ignore all PhyRdy 980 * Clear flag to indicate that we should ignore all PhyRdy
@@ -1937,8 +1938,8 @@ static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1937 ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat); 1938 ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat);
1938 1939
1939 /* AHCI needs SError cleared; otherwise, it might lock up */ 1940 /* AHCI needs SError cleared; otherwise, it might lock up */
1940 ahci_scr_read(ap, SCR_ERROR, &serror); 1941 ahci_scr_read(&ap->link, SCR_ERROR, &serror);
1941 ahci_scr_write(ap, SCR_ERROR, serror); 1942 ahci_scr_write(&ap->link, SCR_ERROR, serror);
1942 host_ehi->serror |= serror; 1943 host_ehi->serror |= serror;
1943 1944
1944 /* some controllers set IRQ_IF_ERR on device errors, ignore it */ 1945 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
@@ -2027,7 +2028,7 @@ static void ahci_port_intr(struct ata_port *ap)
2027 if ((hpriv->flags & AHCI_HFLAG_NO_HOTPLUG) && 2028 if ((hpriv->flags & AHCI_HFLAG_NO_HOTPLUG) &&
2028 (status & PORT_IRQ_PHYRDY)) { 2029 (status & PORT_IRQ_PHYRDY)) {
2029 status &= ~PORT_IRQ_PHYRDY; 2030 status &= ~PORT_IRQ_PHYRDY;
2030 ahci_scr_write(ap, SCR_ERROR, ((1 << 16) | (1 << 18))); 2031 ahci_scr_write(&ap->link, SCR_ERROR, ((1 << 16) | (1 << 18)));
2031 } 2032 }
2032 2033
2033 if (unlikely(status & PORT_IRQ_ERROR)) { 2034 if (unlikely(status & PORT_IRQ_ERROR)) {
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index e6b4606e36b6..e9e32ed6b1a3 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -165,8 +165,10 @@ static void piix_set_dmamode(struct ata_port *ap, struct ata_device *adev);
165static void ich_set_dmamode(struct ata_port *ap, struct ata_device *adev); 165static void ich_set_dmamode(struct ata_port *ap, struct ata_device *adev);
166static int ich_pata_cable_detect(struct ata_port *ap); 166static int ich_pata_cable_detect(struct ata_port *ap);
167static u8 piix_vmw_bmdma_status(struct ata_port *ap); 167static u8 piix_vmw_bmdma_status(struct ata_port *ap);
168static int piix_sidpr_scr_read(struct ata_port *ap, unsigned int reg, u32 *val); 168static int piix_sidpr_scr_read(struct ata_link *link,
169static int piix_sidpr_scr_write(struct ata_port *ap, unsigned int reg, u32 val); 169 unsigned int reg, u32 *val);
170static int piix_sidpr_scr_write(struct ata_link *link,
171 unsigned int reg, u32 val);
170#ifdef CONFIG_PM 172#ifdef CONFIG_PM
171static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 173static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
172static int piix_pci_device_resume(struct pci_dev *pdev); 174static int piix_pci_device_resume(struct pci_dev *pdev);
@@ -278,12 +280,15 @@ static const struct pci_device_id piix_pci_tbl[] = {
278 /* SATA Controller IDE (PCH) */ 280 /* SATA Controller IDE (PCH) */
279 { 0x8086, 0x3b20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata }, 281 { 0x8086, 0x3b20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
280 /* SATA Controller IDE (PCH) */ 282 /* SATA Controller IDE (PCH) */
283 { 0x8086, 0x3b21, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
284 /* SATA Controller IDE (PCH) */
281 { 0x8086, 0x3b26, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata }, 285 { 0x8086, 0x3b26, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
282 /* SATA Controller IDE (PCH) */ 286 /* SATA Controller IDE (PCH) */
287 { 0x8086, 0x3b28, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
288 /* SATA Controller IDE (PCH) */
283 { 0x8086, 0x3b2d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata }, 289 { 0x8086, 0x3b2d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
284 /* SATA Controller IDE (PCH) */ 290 /* SATA Controller IDE (PCH) */
285 { 0x8086, 0x3b2e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata }, 291 { 0x8086, 0x3b2e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
286
287 { } /* terminate list */ 292 { } /* terminate list */
288}; 293};
289 294
@@ -582,6 +587,7 @@ static const struct ich_laptop ich_laptop[] = {
582 { 0x27DF, 0x1025, 0x0110 }, /* ICH7 on Acer 3682WLMi */ 587 { 0x27DF, 0x1025, 0x0110 }, /* ICH7 on Acer 3682WLMi */
583 { 0x27DF, 0x1043, 0x1267 }, /* ICH7 on Asus W5F */ 588 { 0x27DF, 0x1043, 0x1267 }, /* ICH7 on Asus W5F */
584 { 0x27DF, 0x103C, 0x30A1 }, /* ICH7 on HP Compaq nc2400 */ 589 { 0x27DF, 0x103C, 0x30A1 }, /* ICH7 on HP Compaq nc2400 */
590 { 0x27DF, 0x1071, 0xD221 }, /* ICH7 on Hercules EC-900 */
585 { 0x24CA, 0x1025, 0x0061 }, /* ICH4 on ACER Aspire 2023WLMi */ 591 { 0x24CA, 0x1025, 0x0061 }, /* ICH4 on ACER Aspire 2023WLMi */
586 { 0x24CA, 0x1025, 0x003d }, /* ICH4 on ACER TM290 */ 592 { 0x24CA, 0x1025, 0x003d }, /* ICH4 on ACER TM290 */
587 { 0x266F, 0x1025, 0x0066 }, /* ICH6 on ACER Aspire 1694WLMi */ 593 { 0x266F, 0x1025, 0x0066 }, /* ICH6 on ACER Aspire 1694WLMi */
@@ -885,23 +891,9 @@ static void ich_set_dmamode(struct ata_port *ap, struct ata_device *adev)
885 * Serial ATA Index/Data Pair Superset Registers access 891 * Serial ATA Index/Data Pair Superset Registers access
886 * 892 *
887 * Beginning from ICH8, there's a sane way to access SCRs using index 893 * Beginning from ICH8, there's a sane way to access SCRs using index
888 * and data register pair located at BAR5. This creates an 894 * and data register pair located at BAR5 which means that we have
889 * interesting problem of mapping two SCRs to one port. 895 * separate SCRs for master and slave. This is handled using libata
890 * 896 * slave_link facility.
891 * Although they have separate SCRs, the master and slave aren't
892 * independent enough to be treated as separate links - e.g. softreset
893 * resets both. Also, there's no protocol defined for hard resetting
894 * singled device sharing the virtual port (no defined way to acquire
895 * device signature). This is worked around by merging the SCR values
896 * into one sensible value and requesting follow-up SRST after
897 * hardreset.
898 *
899 * SCR merging is perfomed in nibbles which is the unit contents in
900 * SCRs are organized. If two values are equal, the value is used.
901 * When they differ, merge table which lists precedence of possible
902 * values is consulted and the first match or the last entry when
903 * nothing matches is used. When there's no merge table for the
904 * specific nibble, value from the first port is used.
905 */ 897 */
906static const int piix_sidx_map[] = { 898static const int piix_sidx_map[] = {
907 [SCR_STATUS] = 0, 899 [SCR_STATUS] = 0,
@@ -909,120 +901,38 @@ static const int piix_sidx_map[] = {
909 [SCR_CONTROL] = 1, 901 [SCR_CONTROL] = 1,
910}; 902};
911 903
912static void piix_sidpr_sel(struct ata_device *dev, unsigned int reg) 904static void piix_sidpr_sel(struct ata_link *link, unsigned int reg)
913{ 905{
914 struct ata_port *ap = dev->link->ap; 906 struct ata_port *ap = link->ap;
915 struct piix_host_priv *hpriv = ap->host->private_data; 907 struct piix_host_priv *hpriv = ap->host->private_data;
916 908
917 iowrite32(((ap->port_no * 2 + dev->devno) << 8) | piix_sidx_map[reg], 909 iowrite32(((ap->port_no * 2 + link->pmp) << 8) | piix_sidx_map[reg],
918 hpriv->sidpr + PIIX_SIDPR_IDX); 910 hpriv->sidpr + PIIX_SIDPR_IDX);
919} 911}
920 912
921static int piix_sidpr_read(struct ata_device *dev, unsigned int reg) 913static int piix_sidpr_scr_read(struct ata_link *link,
922{ 914 unsigned int reg, u32 *val)
923 struct piix_host_priv *hpriv = dev->link->ap->host->private_data;
924
925 piix_sidpr_sel(dev, reg);
926 return ioread32(hpriv->sidpr + PIIX_SIDPR_DATA);
927}
928
929static void piix_sidpr_write(struct ata_device *dev, unsigned int reg, u32 val)
930{
931 struct piix_host_priv *hpriv = dev->link->ap->host->private_data;
932
933 piix_sidpr_sel(dev, reg);
934 iowrite32(val, hpriv->sidpr + PIIX_SIDPR_DATA);
935}
936
937static u32 piix_merge_scr(u32 val0, u32 val1, const int * const *merge_tbl)
938{
939 u32 val = 0;
940 int i, mi;
941
942 for (i = 0, mi = 0; i < 32 / 4; i++) {
943 u8 c0 = (val0 >> (i * 4)) & 0xf;
944 u8 c1 = (val1 >> (i * 4)) & 0xf;
945 u8 merged = c0;
946 const int *cur;
947
948 /* if no merge preference, assume the first value */
949 cur = merge_tbl[mi];
950 if (!cur)
951 goto done;
952 mi++;
953
954 /* if two values equal, use it */
955 if (c0 == c1)
956 goto done;
957
958 /* choose the first match or the last from the merge table */
959 while (*cur != -1) {
960 if (c0 == *cur || c1 == *cur)
961 break;
962 cur++;
963 }
964 if (*cur == -1)
965 cur--;
966 merged = *cur;
967 done:
968 val |= merged << (i * 4);
969 }
970
971 return val;
972}
973
974static int piix_sidpr_scr_read(struct ata_port *ap, unsigned int reg, u32 *val)
975{ 915{
976 const int * const sstatus_merge_tbl[] = { 916 struct piix_host_priv *hpriv = link->ap->host->private_data;
977 /* DET */ (const int []){ 1, 3, 0, 4, 3, -1 },
978 /* SPD */ (const int []){ 2, 1, 0, -1 },
979 /* IPM */ (const int []){ 6, 2, 1, 0, -1 },
980 NULL,
981 };
982 const int * const scontrol_merge_tbl[] = {
983 /* DET */ (const int []){ 1, 0, 4, 0, -1 },
984 /* SPD */ (const int []){ 0, 2, 1, 0, -1 },
985 /* IPM */ (const int []){ 0, 1, 2, 3, 0, -1 },
986 NULL,
987 };
988 u32 v0, v1;
989 917
990 if (reg >= ARRAY_SIZE(piix_sidx_map)) 918 if (reg >= ARRAY_SIZE(piix_sidx_map))
991 return -EINVAL; 919 return -EINVAL;
992 920
993 if (!(ap->flags & ATA_FLAG_SLAVE_POSS)) { 921 piix_sidpr_sel(link, reg);
994 *val = piix_sidpr_read(&ap->link.device[0], reg); 922 *val = ioread32(hpriv->sidpr + PIIX_SIDPR_DATA);
995 return 0;
996 }
997
998 v0 = piix_sidpr_read(&ap->link.device[0], reg);
999 v1 = piix_sidpr_read(&ap->link.device[1], reg);
1000
1001 switch (reg) {
1002 case SCR_STATUS:
1003 *val = piix_merge_scr(v0, v1, sstatus_merge_tbl);
1004 break;
1005 case SCR_ERROR:
1006 *val = v0 | v1;
1007 break;
1008 case SCR_CONTROL:
1009 *val = piix_merge_scr(v0, v1, scontrol_merge_tbl);
1010 break;
1011 }
1012
1013 return 0; 923 return 0;
1014} 924}
1015 925
1016static int piix_sidpr_scr_write(struct ata_port *ap, unsigned int reg, u32 val) 926static int piix_sidpr_scr_write(struct ata_link *link,
927 unsigned int reg, u32 val)
1017{ 928{
929 struct piix_host_priv *hpriv = link->ap->host->private_data;
930
1018 if (reg >= ARRAY_SIZE(piix_sidx_map)) 931 if (reg >= ARRAY_SIZE(piix_sidx_map))
1019 return -EINVAL; 932 return -EINVAL;
1020 933
1021 piix_sidpr_write(&ap->link.device[0], reg, val); 934 piix_sidpr_sel(link, reg);
1022 935 iowrite32(val, hpriv->sidpr + PIIX_SIDPR_DATA);
1023 if (ap->flags & ATA_FLAG_SLAVE_POSS)
1024 piix_sidpr_write(&ap->link.device[1], reg, val);
1025
1026 return 0; 936 return 0;
1027} 937}
1028 938
@@ -1363,28 +1273,28 @@ static const int *__devinit piix_init_sata_map(struct pci_dev *pdev,
1363 return map; 1273 return map;
1364} 1274}
1365 1275
1366static void __devinit piix_init_sidpr(struct ata_host *host) 1276static int __devinit piix_init_sidpr(struct ata_host *host)
1367{ 1277{
1368 struct pci_dev *pdev = to_pci_dev(host->dev); 1278 struct pci_dev *pdev = to_pci_dev(host->dev);
1369 struct piix_host_priv *hpriv = host->private_data; 1279 struct piix_host_priv *hpriv = host->private_data;
1370 struct ata_device *dev0 = &host->ports[0]->link.device[0]; 1280 struct ata_link *link0 = &host->ports[0]->link;
1371 u32 scontrol; 1281 u32 scontrol;
1372 int i; 1282 int i, rc;
1373 1283
1374 /* check for availability */ 1284 /* check for availability */
1375 for (i = 0; i < 4; i++) 1285 for (i = 0; i < 4; i++)
1376 if (hpriv->map[i] == IDE) 1286 if (hpriv->map[i] == IDE)
1377 return; 1287 return 0;
1378 1288
1379 if (!(host->ports[0]->flags & PIIX_FLAG_SIDPR)) 1289 if (!(host->ports[0]->flags & PIIX_FLAG_SIDPR))
1380 return; 1290 return 0;
1381 1291
1382 if (pci_resource_start(pdev, PIIX_SIDPR_BAR) == 0 || 1292 if (pci_resource_start(pdev, PIIX_SIDPR_BAR) == 0 ||
1383 pci_resource_len(pdev, PIIX_SIDPR_BAR) != PIIX_SIDPR_LEN) 1293 pci_resource_len(pdev, PIIX_SIDPR_BAR) != PIIX_SIDPR_LEN)
1384 return; 1294 return 0;
1385 1295
1386 if (pcim_iomap_regions(pdev, 1 << PIIX_SIDPR_BAR, DRV_NAME)) 1296 if (pcim_iomap_regions(pdev, 1 << PIIX_SIDPR_BAR, DRV_NAME))
1387 return; 1297 return 0;
1388 1298
1389 hpriv->sidpr = pcim_iomap_table(pdev)[PIIX_SIDPR_BAR]; 1299 hpriv->sidpr = pcim_iomap_table(pdev)[PIIX_SIDPR_BAR];
1390 1300
@@ -1392,7 +1302,7 @@ static void __devinit piix_init_sidpr(struct ata_host *host)
1392 * Give it a test drive by inhibiting power save modes which 1302 * Give it a test drive by inhibiting power save modes which
1393 * we'll do anyway. 1303 * we'll do anyway.
1394 */ 1304 */
1395 scontrol = piix_sidpr_read(dev0, SCR_CONTROL); 1305 piix_sidpr_scr_read(link0, SCR_CONTROL, &scontrol);
1396 1306
1397 /* if IPM is already 3, SCR access is probably working. Don't 1307 /* if IPM is already 3, SCR access is probably working. Don't
1398 * un-inhibit power save modes as BIOS might have inhibited 1308 * un-inhibit power save modes as BIOS might have inhibited
@@ -1400,18 +1310,30 @@ static void __devinit piix_init_sidpr(struct ata_host *host)
1400 */ 1310 */
1401 if ((scontrol & 0xf00) != 0x300) { 1311 if ((scontrol & 0xf00) != 0x300) {
1402 scontrol |= 0x300; 1312 scontrol |= 0x300;
1403 piix_sidpr_write(dev0, SCR_CONTROL, scontrol); 1313 piix_sidpr_scr_write(link0, SCR_CONTROL, scontrol);
1404 scontrol = piix_sidpr_read(dev0, SCR_CONTROL); 1314 piix_sidpr_scr_read(link0, SCR_CONTROL, &scontrol);
1405 1315
1406 if ((scontrol & 0xf00) != 0x300) { 1316 if ((scontrol & 0xf00) != 0x300) {
1407 dev_printk(KERN_INFO, host->dev, "SCR access via " 1317 dev_printk(KERN_INFO, host->dev, "SCR access via "
1408 "SIDPR is available but doesn't work\n"); 1318 "SIDPR is available but doesn't work\n");
1409 return; 1319 return 0;
1410 } 1320 }
1411 } 1321 }
1412 1322
1413 host->ports[0]->ops = &piix_sidpr_sata_ops; 1323 /* okay, SCRs available, set ops and ask libata for slave_link */
1414 host->ports[1]->ops = &piix_sidpr_sata_ops; 1324 for (i = 0; i < 2; i++) {
1325 struct ata_port *ap = host->ports[i];
1326
1327 ap->ops = &piix_sidpr_sata_ops;
1328
1329 if (ap->flags & ATA_FLAG_SLAVE_POSS) {
1330 rc = ata_slave_link_init(ap);
1331 if (rc)
1332 return rc;
1333 }
1334 }
1335
1336 return 0;
1415} 1337}
1416 1338
1417static void piix_iocfg_bit18_quirk(struct pci_dev *pdev) 1339static void piix_iocfg_bit18_quirk(struct pci_dev *pdev)
@@ -1521,7 +1443,9 @@ static int __devinit piix_init_one(struct pci_dev *pdev,
1521 /* initialize controller */ 1443 /* initialize controller */
1522 if (port_flags & ATA_FLAG_SATA) { 1444 if (port_flags & ATA_FLAG_SATA) {
1523 piix_init_pcs(host, piix_map_db_table[ent->driver_data]); 1445 piix_init_pcs(host, piix_map_db_table[ent->driver_data]);
1524 piix_init_sidpr(host); 1446 rc = piix_init_sidpr(host);
1447 if (rc)
1448 return rc;
1525 } 1449 }
1526 1450
1527 /* apply IOCFG bit18 quirk */ 1451 /* apply IOCFG bit18 quirk */
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 79e3a8e7a84a..1ee9499bd343 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -163,6 +163,67 @@ MODULE_LICENSE("GPL");
163MODULE_VERSION(DRV_VERSION); 163MODULE_VERSION(DRV_VERSION);
164 164
165 165
166/*
167 * Iterator helpers. Don't use directly.
168 *
169 * LOCKING:
170 * Host lock or EH context.
171 */
172struct ata_link *__ata_port_next_link(struct ata_port *ap,
173 struct ata_link *link, bool dev_only)
174{
175 /* NULL link indicates start of iteration */
176 if (!link) {
177 if (dev_only && sata_pmp_attached(ap))
178 return ap->pmp_link;
179 return &ap->link;
180 }
181
182 /* we just iterated over the host master link, what's next? */
183 if (link == &ap->link) {
184 if (!sata_pmp_attached(ap)) {
185 if (unlikely(ap->slave_link) && !dev_only)
186 return ap->slave_link;
187 return NULL;
188 }
189 return ap->pmp_link;
190 }
191
192 /* slave_link excludes PMP */
193 if (unlikely(link == ap->slave_link))
194 return NULL;
195
196 /* iterate to the next PMP link */
197 if (++link < ap->pmp_link + ap->nr_pmp_links)
198 return link;
199 return NULL;
200}
201
202/**
203 * ata_dev_phys_link - find physical link for a device
204 * @dev: ATA device to look up physical link for
205 *
206 * Look up physical link which @dev is attached to. Note that
207 * this is different from @dev->link only when @dev is on slave
208 * link. For all other cases, it's the same as @dev->link.
209 *
210 * LOCKING:
211 * Don't care.
212 *
213 * RETURNS:
214 * Pointer to the found physical link.
215 */
216struct ata_link *ata_dev_phys_link(struct ata_device *dev)
217{
218 struct ata_port *ap = dev->link->ap;
219
220 if (!ap->slave_link)
221 return dev->link;
222 if (!dev->devno)
223 return &ap->link;
224 return ap->slave_link;
225}
226
166/** 227/**
167 * ata_force_cbl - force cable type according to libata.force 228 * ata_force_cbl - force cable type according to libata.force
168 * @ap: ATA port of interest 229 * @ap: ATA port of interest
@@ -206,7 +267,8 @@ void ata_force_cbl(struct ata_port *ap)
206 * the host link and all fan-out ports connected via PMP. If the 267 * the host link and all fan-out ports connected via PMP. If the
207 * device part is specified as 0 (e.g. 1.00:), it specifies the 268 * device part is specified as 0 (e.g. 1.00:), it specifies the
208 * first fan-out link not the host link. Device number 15 always 269 * first fan-out link not the host link. Device number 15 always
209 * points to the host link whether PMP is attached or not. 270 * points to the host link whether PMP is attached or not. If the
271 * controller has slave link, device number 16 points to it.
210 * 272 *
211 * LOCKING: 273 * LOCKING:
212 * EH context. 274 * EH context.
@@ -214,12 +276,11 @@ void ata_force_cbl(struct ata_port *ap)
214static void ata_force_link_limits(struct ata_link *link) 276static void ata_force_link_limits(struct ata_link *link)
215{ 277{
216 bool did_spd = false; 278 bool did_spd = false;
217 int linkno, i; 279 int linkno = link->pmp;
280 int i;
218 281
219 if (ata_is_host_link(link)) 282 if (ata_is_host_link(link))
220 linkno = 15; 283 linkno += 15;
221 else
222 linkno = link->pmp;
223 284
224 for (i = ata_force_tbl_size - 1; i >= 0; i--) { 285 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
225 const struct ata_force_ent *fe = &ata_force_tbl[i]; 286 const struct ata_force_ent *fe = &ata_force_tbl[i];
@@ -266,9 +327,9 @@ static void ata_force_xfermask(struct ata_device *dev)
266 int alt_devno = devno; 327 int alt_devno = devno;
267 int i; 328 int i;
268 329
269 /* allow n.15 for the first device attached to host port */ 330 /* allow n.15/16 for devices attached to host port */
270 if (ata_is_host_link(dev->link) && devno == 0) 331 if (ata_is_host_link(dev->link))
271 alt_devno = 15; 332 alt_devno += 15;
272 333
273 for (i = ata_force_tbl_size - 1; i >= 0; i--) { 334 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
274 const struct ata_force_ent *fe = &ata_force_tbl[i]; 335 const struct ata_force_ent *fe = &ata_force_tbl[i];
@@ -320,9 +381,9 @@ static void ata_force_horkage(struct ata_device *dev)
320 int alt_devno = devno; 381 int alt_devno = devno;
321 int i; 382 int i;
322 383
323 /* allow n.15 for the first device attached to host port */ 384 /* allow n.15/16 for devices attached to host port */
324 if (ata_is_host_link(dev->link) && devno == 0) 385 if (ata_is_host_link(dev->link))
325 alt_devno = 15; 386 alt_devno += 15;
326 387
327 for (i = 0; i < ata_force_tbl_size; i++) { 388 for (i = 0; i < ata_force_tbl_size; i++) {
328 const struct ata_force_ent *fe = &ata_force_tbl[i]; 389 const struct ata_force_ent *fe = &ata_force_tbl[i];
@@ -2681,7 +2742,7 @@ static void sata_print_link_status(struct ata_link *link)
2681 return; 2742 return;
2682 sata_scr_read(link, SCR_CONTROL, &scontrol); 2743 sata_scr_read(link, SCR_CONTROL, &scontrol);
2683 2744
2684 if (ata_link_online(link)) { 2745 if (ata_phys_link_online(link)) {
2685 tmp = (sstatus >> 4) & 0xf; 2746 tmp = (sstatus >> 4) & 0xf;
2686 ata_link_printk(link, KERN_INFO, 2747 ata_link_printk(link, KERN_INFO,
2687 "SATA link up %s (SStatus %X SControl %X)\n", 2748 "SATA link up %s (SStatus %X SControl %X)\n",
@@ -3372,6 +3433,12 @@ int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3372 unsigned long nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT); 3433 unsigned long nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3373 int warned = 0; 3434 int warned = 0;
3374 3435
3436 /* Slave readiness can't be tested separately from master. On
3437 * M/S emulation configuration, this function should be called
3438 * only on the master and it will handle both master and slave.
3439 */
3440 WARN_ON(link == link->ap->slave_link);
3441
3375 if (time_after(nodev_deadline, deadline)) 3442 if (time_after(nodev_deadline, deadline))
3376 nodev_deadline = deadline; 3443 nodev_deadline = deadline;
3377 3444
@@ -3593,7 +3660,7 @@ int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3593 } 3660 }
3594 3661
3595 /* no point in trying softreset on offline link */ 3662 /* no point in trying softreset on offline link */
3596 if (ata_link_offline(link)) 3663 if (ata_phys_link_offline(link))
3597 ehc->i.action &= ~ATA_EH_SOFTRESET; 3664 ehc->i.action &= ~ATA_EH_SOFTRESET;
3598 3665
3599 return 0; 3666 return 0;
@@ -3671,7 +3738,7 @@ int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
3671 if (rc) 3738 if (rc)
3672 goto out; 3739 goto out;
3673 /* if link is offline nothing more to do */ 3740 /* if link is offline nothing more to do */
3674 if (ata_link_offline(link)) 3741 if (ata_phys_link_offline(link))
3675 goto out; 3742 goto out;
3676 3743
3677 /* Link is online. From this point, -ENODEV too is an error. */ 3744 /* Link is online. From this point, -ENODEV too is an error. */
@@ -4868,10 +4935,8 @@ int sata_scr_valid(struct ata_link *link)
4868int sata_scr_read(struct ata_link *link, int reg, u32 *val) 4935int sata_scr_read(struct ata_link *link, int reg, u32 *val)
4869{ 4936{
4870 if (ata_is_host_link(link)) { 4937 if (ata_is_host_link(link)) {
4871 struct ata_port *ap = link->ap;
4872
4873 if (sata_scr_valid(link)) 4938 if (sata_scr_valid(link))
4874 return ap->ops->scr_read(ap, reg, val); 4939 return link->ap->ops->scr_read(link, reg, val);
4875 return -EOPNOTSUPP; 4940 return -EOPNOTSUPP;
4876 } 4941 }
4877 4942
@@ -4897,10 +4962,8 @@ int sata_scr_read(struct ata_link *link, int reg, u32 *val)
4897int sata_scr_write(struct ata_link *link, int reg, u32 val) 4962int sata_scr_write(struct ata_link *link, int reg, u32 val)
4898{ 4963{
4899 if (ata_is_host_link(link)) { 4964 if (ata_is_host_link(link)) {
4900 struct ata_port *ap = link->ap;
4901
4902 if (sata_scr_valid(link)) 4965 if (sata_scr_valid(link))
4903 return ap->ops->scr_write(ap, reg, val); 4966 return link->ap->ops->scr_write(link, reg, val);
4904 return -EOPNOTSUPP; 4967 return -EOPNOTSUPP;
4905 } 4968 }
4906 4969
@@ -4925,13 +4988,12 @@ int sata_scr_write(struct ata_link *link, int reg, u32 val)
4925int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) 4988int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
4926{ 4989{
4927 if (ata_is_host_link(link)) { 4990 if (ata_is_host_link(link)) {
4928 struct ata_port *ap = link->ap;
4929 int rc; 4991 int rc;
4930 4992
4931 if (sata_scr_valid(link)) { 4993 if (sata_scr_valid(link)) {
4932 rc = ap->ops->scr_write(ap, reg, val); 4994 rc = link->ap->ops->scr_write(link, reg, val);
4933 if (rc == 0) 4995 if (rc == 0)
4934 rc = ap->ops->scr_read(ap, reg, &val); 4996 rc = link->ap->ops->scr_read(link, reg, &val);
4935 return rc; 4997 return rc;
4936 } 4998 }
4937 return -EOPNOTSUPP; 4999 return -EOPNOTSUPP;
@@ -4941,7 +5003,7 @@ int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
4941} 5003}
4942 5004
4943/** 5005/**
4944 * ata_link_online - test whether the given link is online 5006 * ata_phys_link_online - test whether the given link is online
4945 * @link: ATA link to test 5007 * @link: ATA link to test
4946 * 5008 *
4947 * Test whether @link is online. Note that this function returns 5009 * Test whether @link is online. Note that this function returns
@@ -4952,20 +5014,20 @@ int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
4952 * None. 5014 * None.
4953 * 5015 *
4954 * RETURNS: 5016 * RETURNS:
4955 * 1 if the port online status is available and online. 5017 * True if the port online status is available and online.
4956 */ 5018 */
4957int ata_link_online(struct ata_link *link) 5019bool ata_phys_link_online(struct ata_link *link)
4958{ 5020{
4959 u32 sstatus; 5021 u32 sstatus;
4960 5022
4961 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 5023 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
4962 (sstatus & 0xf) == 0x3) 5024 (sstatus & 0xf) == 0x3)
4963 return 1; 5025 return true;
4964 return 0; 5026 return false;
4965} 5027}
4966 5028
4967/** 5029/**
4968 * ata_link_offline - test whether the given link is offline 5030 * ata_phys_link_offline - test whether the given link is offline
4969 * @link: ATA link to test 5031 * @link: ATA link to test
4970 * 5032 *
4971 * Test whether @link is offline. Note that this function 5033 * Test whether @link is offline. Note that this function
@@ -4976,16 +5038,68 @@ int ata_link_online(struct ata_link *link)
4976 * None. 5038 * None.
4977 * 5039 *
4978 * RETURNS: 5040 * RETURNS:
4979 * 1 if the port offline status is available and offline. 5041 * True if the port offline status is available and offline.
4980 */ 5042 */
4981int ata_link_offline(struct ata_link *link) 5043bool ata_phys_link_offline(struct ata_link *link)
4982{ 5044{
4983 u32 sstatus; 5045 u32 sstatus;
4984 5046
4985 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 5047 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
4986 (sstatus & 0xf) != 0x3) 5048 (sstatus & 0xf) != 0x3)
4987 return 1; 5049 return true;
4988 return 0; 5050 return false;
5051}
5052
5053/**
5054 * ata_link_online - test whether the given link is online
5055 * @link: ATA link to test
5056 *
5057 * Test whether @link is online. This is identical to
5058 * ata_phys_link_online() when there's no slave link. When
5059 * there's a slave link, this function should only be called on
5060 * the master link and will return true if any of M/S links is
5061 * online.
5062 *
5063 * LOCKING:
5064 * None.
5065 *
5066 * RETURNS:
5067 * True if the port online status is available and online.
5068 */
5069bool ata_link_online(struct ata_link *link)
5070{
5071 struct ata_link *slave = link->ap->slave_link;
5072
5073 WARN_ON(link == slave); /* shouldn't be called on slave link */
5074
5075 return ata_phys_link_online(link) ||
5076 (slave && ata_phys_link_online(slave));
5077}
5078
5079/**
5080 * ata_link_offline - test whether the given link is offline
5081 * @link: ATA link to test
5082 *
5083 * Test whether @link is offline. This is identical to
5084 * ata_phys_link_offline() when there's no slave link. When
5085 * there's a slave link, this function should only be called on
5086 * the master link and will return true if both M/S links are
5087 * offline.
5088 *
5089 * LOCKING:
5090 * None.
5091 *
5092 * RETURNS:
5093 * True if the port offline status is available and offline.
5094 */
5095bool ata_link_offline(struct ata_link *link)
5096{
5097 struct ata_link *slave = link->ap->slave_link;
5098
5099 WARN_ON(link == slave); /* shouldn't be called on slave link */
5100
5101 return ata_phys_link_offline(link) &&
5102 (!slave || ata_phys_link_offline(slave));
4989} 5103}
4990 5104
4991#ifdef CONFIG_PM 5105#ifdef CONFIG_PM
@@ -5127,11 +5241,11 @@ int ata_port_start(struct ata_port *ap)
5127 */ 5241 */
5128void ata_dev_init(struct ata_device *dev) 5242void ata_dev_init(struct ata_device *dev)
5129{ 5243{
5130 struct ata_link *link = dev->link; 5244 struct ata_link *link = ata_dev_phys_link(dev);
5131 struct ata_port *ap = link->ap; 5245 struct ata_port *ap = link->ap;
5132 unsigned long flags; 5246 unsigned long flags;
5133 5247
5134 /* SATA spd limit is bound to the first device */ 5248 /* SATA spd limit is bound to the attached device, reset together */
5135 link->sata_spd_limit = link->hw_sata_spd_limit; 5249 link->sata_spd_limit = link->hw_sata_spd_limit;
5136 link->sata_spd = 0; 5250 link->sata_spd = 0;
5137 5251
@@ -5264,6 +5378,7 @@ struct ata_port *ata_port_alloc(struct ata_host *host)
5264 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); 5378 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5265 INIT_LIST_HEAD(&ap->eh_done_q); 5379 INIT_LIST_HEAD(&ap->eh_done_q);
5266 init_waitqueue_head(&ap->eh_wait_q); 5380 init_waitqueue_head(&ap->eh_wait_q);
5381 init_completion(&ap->park_req_pending);
5267 init_timer_deferrable(&ap->fastdrain_timer); 5382 init_timer_deferrable(&ap->fastdrain_timer);
5268 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; 5383 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5269 ap->fastdrain_timer.data = (unsigned long)ap; 5384 ap->fastdrain_timer.data = (unsigned long)ap;
@@ -5294,6 +5409,7 @@ static void ata_host_release(struct device *gendev, void *res)
5294 scsi_host_put(ap->scsi_host); 5409 scsi_host_put(ap->scsi_host);
5295 5410
5296 kfree(ap->pmp_link); 5411 kfree(ap->pmp_link);
5412 kfree(ap->slave_link);
5297 kfree(ap); 5413 kfree(ap);
5298 host->ports[i] = NULL; 5414 host->ports[i] = NULL;
5299 } 5415 }
@@ -5414,6 +5530,68 @@ struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5414 return host; 5530 return host;
5415} 5531}
5416 5532
5533/**
5534 * ata_slave_link_init - initialize slave link
5535 * @ap: port to initialize slave link for
5536 *
5537 * Create and initialize slave link for @ap. This enables slave
5538 * link handling on the port.
5539 *
5540 * In libata, a port contains links and a link contains devices.
5541 * There is single host link but if a PMP is attached to it,
5542 * there can be multiple fan-out links. On SATA, there's usually
5543 * a single device connected to a link but PATA and SATA
5544 * controllers emulating TF based interface can have two - master
5545 * and slave.
5546 *
5547 * However, there are a few controllers which don't fit into this
5548 * abstraction too well - SATA controllers which emulate TF
5549 * interface with both master and slave devices but also have
5550 * separate SCR register sets for each device. These controllers
5551 * need separate links for physical link handling
5552 * (e.g. onlineness, link speed) but should be treated like a
5553 * traditional M/S controller for everything else (e.g. command
5554 * issue, softreset).
5555 *
5556 * slave_link is libata's way of handling this class of
5557 * controllers without impacting core layer too much. For
5558 * anything other than physical link handling, the default host
5559 * link is used for both master and slave. For physical link
5560 * handling, separate @ap->slave_link is used. All dirty details
5561 * are implemented inside libata core layer. From LLD's POV, the
5562 * only difference is that prereset, hardreset and postreset are
5563 * called once more for the slave link, so the reset sequence
5564 * looks like the following.
5565 *
5566 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5567 * softreset(M) -> postreset(M) -> postreset(S)
5568 *
5569 * Note that softreset is called only for the master. Softreset
5570 * resets both M/S by definition, so SRST on master should handle
5571 * both (the standard method will work just fine).
5572 *
5573 * LOCKING:
5574 * Should be called before host is registered.
5575 *
5576 * RETURNS:
5577 * 0 on success, -errno on failure.
5578 */
5579int ata_slave_link_init(struct ata_port *ap)
5580{
5581 struct ata_link *link;
5582
5583 WARN_ON(ap->slave_link);
5584 WARN_ON(ap->flags & ATA_FLAG_PMP);
5585
5586 link = kzalloc(sizeof(*link), GFP_KERNEL);
5587 if (!link)
5588 return -ENOMEM;
5589
5590 ata_link_init(ap, link, 1);
5591 ap->slave_link = link;
5592 return 0;
5593}
5594
5417static void ata_host_stop(struct device *gendev, void *res) 5595static void ata_host_stop(struct device *gendev, void *res)
5418{ 5596{
5419 struct ata_host *host = dev_get_drvdata(gendev); 5597 struct ata_host *host = dev_get_drvdata(gendev);
@@ -5640,6 +5818,8 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
5640 5818
5641 /* init sata_spd_limit to the current value */ 5819 /* init sata_spd_limit to the current value */
5642 sata_link_init_spd(&ap->link); 5820 sata_link_init_spd(&ap->link);
5821 if (ap->slave_link)
5822 sata_link_init_spd(ap->slave_link);
5643 5823
5644 /* print per-port info to dmesg */ 5824 /* print per-port info to dmesg */
5645 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, 5825 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
@@ -6260,10 +6440,12 @@ EXPORT_SYMBOL_GPL(ata_base_port_ops);
6260EXPORT_SYMBOL_GPL(sata_port_ops); 6440EXPORT_SYMBOL_GPL(sata_port_ops);
6261EXPORT_SYMBOL_GPL(ata_dummy_port_ops); 6441EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6262EXPORT_SYMBOL_GPL(ata_dummy_port_info); 6442EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6443EXPORT_SYMBOL_GPL(__ata_port_next_link);
6263EXPORT_SYMBOL_GPL(ata_std_bios_param); 6444EXPORT_SYMBOL_GPL(ata_std_bios_param);
6264EXPORT_SYMBOL_GPL(ata_host_init); 6445EXPORT_SYMBOL_GPL(ata_host_init);
6265EXPORT_SYMBOL_GPL(ata_host_alloc); 6446EXPORT_SYMBOL_GPL(ata_host_alloc);
6266EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); 6447EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
6448EXPORT_SYMBOL_GPL(ata_slave_link_init);
6267EXPORT_SYMBOL_GPL(ata_host_start); 6449EXPORT_SYMBOL_GPL(ata_host_start);
6268EXPORT_SYMBOL_GPL(ata_host_register); 6450EXPORT_SYMBOL_GPL(ata_host_register);
6269EXPORT_SYMBOL_GPL(ata_host_activate); 6451EXPORT_SYMBOL_GPL(ata_host_activate);
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index c1db2f234d2e..f2dd99122bd6 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -79,6 +79,8 @@ enum {
79 */ 79 */
80 ATA_EH_PRERESET_TIMEOUT = 10000, 80 ATA_EH_PRERESET_TIMEOUT = 10000,
81 ATA_EH_FASTDRAIN_INTERVAL = 3000, 81 ATA_EH_FASTDRAIN_INTERVAL = 3000,
82
83 ATA_EH_UA_TRIES = 5,
82}; 84};
83 85
84/* The following table determines how we sequence resets. Each entry 86/* The following table determines how we sequence resets. Each entry
@@ -1357,6 +1359,37 @@ static int ata_eh_read_log_10h(struct ata_device *dev,
1357} 1359}
1358 1360
1359/** 1361/**
1362 * atapi_eh_tur - perform ATAPI TEST_UNIT_READY
1363 * @dev: target ATAPI device
1364 * @r_sense_key: out parameter for sense_key
1365 *
1366 * Perform ATAPI TEST_UNIT_READY.
1367 *
1368 * LOCKING:
1369 * EH context (may sleep).
1370 *
1371 * RETURNS:
1372 * 0 on success, AC_ERR_* mask on failure.
1373 */
1374static unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key)
1375{
1376 u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 };
1377 struct ata_taskfile tf;
1378 unsigned int err_mask;
1379
1380 ata_tf_init(dev, &tf);
1381
1382 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1383 tf.command = ATA_CMD_PACKET;
1384 tf.protocol = ATAPI_PROT_NODATA;
1385
1386 err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0);
1387 if (err_mask == AC_ERR_DEV)
1388 *r_sense_key = tf.feature >> 4;
1389 return err_mask;
1390}
1391
1392/**
1360 * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE 1393 * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE
1361 * @dev: device to perform REQUEST_SENSE to 1394 * @dev: device to perform REQUEST_SENSE to
1362 * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) 1395 * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long)
@@ -1756,7 +1789,7 @@ static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev)
1756static unsigned int ata_eh_speed_down(struct ata_device *dev, 1789static unsigned int ata_eh_speed_down(struct ata_device *dev,
1757 unsigned int eflags, unsigned int err_mask) 1790 unsigned int eflags, unsigned int err_mask)
1758{ 1791{
1759 struct ata_link *link = dev->link; 1792 struct ata_link *link = ata_dev_phys_link(dev);
1760 int xfer_ok = 0; 1793 int xfer_ok = 0;
1761 unsigned int verdict; 1794 unsigned int verdict;
1762 unsigned int action = 0; 1795 unsigned int action = 0;
@@ -1880,7 +1913,8 @@ static void ata_eh_link_autopsy(struct ata_link *link)
1880 for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { 1913 for (tag = 0; tag < ATA_MAX_QUEUE; tag++) {
1881 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1914 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1882 1915
1883 if (!(qc->flags & ATA_QCFLAG_FAILED) || qc->dev->link != link) 1916 if (!(qc->flags & ATA_QCFLAG_FAILED) ||
1917 ata_dev_phys_link(qc->dev) != link)
1884 continue; 1918 continue;
1885 1919
1886 /* inherit upper level err_mask */ 1920 /* inherit upper level err_mask */
@@ -1967,6 +2001,23 @@ void ata_eh_autopsy(struct ata_port *ap)
1967 ata_port_for_each_link(link, ap) 2001 ata_port_for_each_link(link, ap)
1968 ata_eh_link_autopsy(link); 2002 ata_eh_link_autopsy(link);
1969 2003
2004 /* Handle the frigging slave link. Autopsy is done similarly
2005 * but actions and flags are transferred over to the master
2006 * link and handled from there.
2007 */
2008 if (ap->slave_link) {
2009 struct ata_eh_context *mehc = &ap->link.eh_context;
2010 struct ata_eh_context *sehc = &ap->slave_link->eh_context;
2011
2012 ata_eh_link_autopsy(ap->slave_link);
2013
2014 ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS);
2015 mehc->i.action |= sehc->i.action;
2016 mehc->i.dev_action[1] |= sehc->i.dev_action[1];
2017 mehc->i.flags |= sehc->i.flags;
2018 ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS);
2019 }
2020
1970 /* Autopsy of fanout ports can affect host link autopsy. 2021 /* Autopsy of fanout ports can affect host link autopsy.
1971 * Perform host link autopsy last. 2022 * Perform host link autopsy last.
1972 */ 2023 */
@@ -2001,7 +2052,8 @@ static void ata_eh_link_report(struct ata_link *link)
2001 for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { 2052 for (tag = 0; tag < ATA_MAX_QUEUE; tag++) {
2002 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 2053 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
2003 2054
2004 if (!(qc->flags & ATA_QCFLAG_FAILED) || qc->dev->link != link || 2055 if (!(qc->flags & ATA_QCFLAG_FAILED) ||
2056 ata_dev_phys_link(qc->dev) != link ||
2005 ((qc->flags & ATA_QCFLAG_QUIET) && 2057 ((qc->flags & ATA_QCFLAG_QUIET) &&
2006 qc->err_mask == AC_ERR_DEV)) 2058 qc->err_mask == AC_ERR_DEV))
2007 continue; 2059 continue;
@@ -2068,7 +2120,7 @@ static void ata_eh_link_report(struct ata_link *link)
2068 char cdb_buf[70] = ""; 2120 char cdb_buf[70] = "";
2069 2121
2070 if (!(qc->flags & ATA_QCFLAG_FAILED) || 2122 if (!(qc->flags & ATA_QCFLAG_FAILED) ||
2071 qc->dev->link != link || !qc->err_mask) 2123 ata_dev_phys_link(qc->dev) != link || !qc->err_mask)
2072 continue; 2124 continue;
2073 2125
2074 if (qc->dma_dir != DMA_NONE) { 2126 if (qc->dma_dir != DMA_NONE) {
@@ -2160,12 +2212,14 @@ void ata_eh_report(struct ata_port *ap)
2160} 2212}
2161 2213
2162static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, 2214static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset,
2163 unsigned int *classes, unsigned long deadline) 2215 unsigned int *classes, unsigned long deadline,
2216 bool clear_classes)
2164{ 2217{
2165 struct ata_device *dev; 2218 struct ata_device *dev;
2166 2219
2167 ata_link_for_each_dev(dev, link) 2220 if (clear_classes)
2168 classes[dev->devno] = ATA_DEV_UNKNOWN; 2221 ata_link_for_each_dev(dev, link)
2222 classes[dev->devno] = ATA_DEV_UNKNOWN;
2169 2223
2170 return reset(link, classes, deadline); 2224 return reset(link, classes, deadline);
2171} 2225}
@@ -2187,17 +2241,20 @@ int ata_eh_reset(struct ata_link *link, int classify,
2187 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) 2241 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset)
2188{ 2242{
2189 struct ata_port *ap = link->ap; 2243 struct ata_port *ap = link->ap;
2244 struct ata_link *slave = ap->slave_link;
2190 struct ata_eh_context *ehc = &link->eh_context; 2245 struct ata_eh_context *ehc = &link->eh_context;
2246 struct ata_eh_context *sehc = &slave->eh_context;
2191 unsigned int *classes = ehc->classes; 2247 unsigned int *classes = ehc->classes;
2192 unsigned int lflags = link->flags; 2248 unsigned int lflags = link->flags;
2193 int verbose = !(ehc->i.flags & ATA_EHI_QUIET); 2249 int verbose = !(ehc->i.flags & ATA_EHI_QUIET);
2194 int max_tries = 0, try = 0; 2250 int max_tries = 0, try = 0;
2251 struct ata_link *failed_link;
2195 struct ata_device *dev; 2252 struct ata_device *dev;
2196 unsigned long deadline, now; 2253 unsigned long deadline, now;
2197 ata_reset_fn_t reset; 2254 ata_reset_fn_t reset;
2198 unsigned long flags; 2255 unsigned long flags;
2199 u32 sstatus; 2256 u32 sstatus;
2200 int nr_known, rc; 2257 int nr_unknown, rc;
2201 2258
2202 /* 2259 /*
2203 * Prepare to reset 2260 * Prepare to reset
@@ -2252,8 +2309,30 @@ int ata_eh_reset(struct ata_link *link, int classify,
2252 } 2309 }
2253 2310
2254 if (prereset) { 2311 if (prereset) {
2255 rc = prereset(link, 2312 unsigned long deadline = ata_deadline(jiffies,
2256 ata_deadline(jiffies, ATA_EH_PRERESET_TIMEOUT)); 2313 ATA_EH_PRERESET_TIMEOUT);
2314
2315 if (slave) {
2316 sehc->i.action &= ~ATA_EH_RESET;
2317 sehc->i.action |= ehc->i.action;
2318 }
2319
2320 rc = prereset(link, deadline);
2321
2322 /* If present, do prereset on slave link too. Reset
2323 * is skipped iff both master and slave links report
2324 * -ENOENT or clear ATA_EH_RESET.
2325 */
2326 if (slave && (rc == 0 || rc == -ENOENT)) {
2327 int tmp;
2328
2329 tmp = prereset(slave, deadline);
2330 if (tmp != -ENOENT)
2331 rc = tmp;
2332
2333 ehc->i.action |= sehc->i.action;
2334 }
2335
2257 if (rc) { 2336 if (rc) {
2258 if (rc == -ENOENT) { 2337 if (rc == -ENOENT) {
2259 ata_link_printk(link, KERN_DEBUG, 2338 ata_link_printk(link, KERN_DEBUG,
@@ -2302,25 +2381,51 @@ int ata_eh_reset(struct ata_link *link, int classify,
2302 else 2381 else
2303 ehc->i.flags |= ATA_EHI_DID_SOFTRESET; 2382 ehc->i.flags |= ATA_EHI_DID_SOFTRESET;
2304 2383
2305 rc = ata_do_reset(link, reset, classes, deadline); 2384 rc = ata_do_reset(link, reset, classes, deadline, true);
2306 if (rc && rc != -EAGAIN) 2385 if (rc && rc != -EAGAIN) {
2386 failed_link = link;
2307 goto fail; 2387 goto fail;
2388 }
2389
2390 /* hardreset slave link if existent */
2391 if (slave && reset == hardreset) {
2392 int tmp;
2393
2394 if (verbose)
2395 ata_link_printk(slave, KERN_INFO,
2396 "hard resetting link\n");
2308 2397
2398 ata_eh_about_to_do(slave, NULL, ATA_EH_RESET);
2399 tmp = ata_do_reset(slave, reset, classes, deadline,
2400 false);
2401 switch (tmp) {
2402 case -EAGAIN:
2403 rc = -EAGAIN;
2404 case 0:
2405 break;
2406 default:
2407 failed_link = slave;
2408 rc = tmp;
2409 goto fail;
2410 }
2411 }
2412
2413 /* perform follow-up SRST if necessary */
2309 if (reset == hardreset && 2414 if (reset == hardreset &&
2310 ata_eh_followup_srst_needed(link, rc, classes)) { 2415 ata_eh_followup_srst_needed(link, rc, classes)) {
2311 /* okay, let's do follow-up softreset */
2312 reset = softreset; 2416 reset = softreset;
2313 2417
2314 if (!reset) { 2418 if (!reset) {
2315 ata_link_printk(link, KERN_ERR, 2419 ata_link_printk(link, KERN_ERR,
2316 "follow-up softreset required " 2420 "follow-up softreset required "
2317 "but no softreset avaliable\n"); 2421 "but no softreset avaliable\n");
2422 failed_link = link;
2318 rc = -EINVAL; 2423 rc = -EINVAL;
2319 goto fail; 2424 goto fail;
2320 } 2425 }
2321 2426
2322 ata_eh_about_to_do(link, NULL, ATA_EH_RESET); 2427 ata_eh_about_to_do(link, NULL, ATA_EH_RESET);
2323 rc = ata_do_reset(link, reset, classes, deadline); 2428 rc = ata_do_reset(link, reset, classes, deadline, true);
2324 } 2429 }
2325 } else { 2430 } else {
2326 if (verbose) 2431 if (verbose)
@@ -2341,7 +2446,7 @@ int ata_eh_reset(struct ata_link *link, int classify,
2341 dev->pio_mode = XFER_PIO_0; 2446 dev->pio_mode = XFER_PIO_0;
2342 dev->flags &= ~ATA_DFLAG_SLEEPING; 2447 dev->flags &= ~ATA_DFLAG_SLEEPING;
2343 2448
2344 if (ata_link_offline(link)) 2449 if (ata_phys_link_offline(ata_dev_phys_link(dev)))
2345 continue; 2450 continue;
2346 2451
2347 /* apply class override */ 2452 /* apply class override */
@@ -2354,6 +2459,8 @@ int ata_eh_reset(struct ata_link *link, int classify,
2354 /* record current link speed */ 2459 /* record current link speed */
2355 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) 2460 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0)
2356 link->sata_spd = (sstatus >> 4) & 0xf; 2461 link->sata_spd = (sstatus >> 4) & 0xf;
2462 if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0)
2463 slave->sata_spd = (sstatus >> 4) & 0xf;
2357 2464
2358 /* thaw the port */ 2465 /* thaw the port */
2359 if (ata_is_host_link(link)) 2466 if (ata_is_host_link(link))
@@ -2366,12 +2473,17 @@ int ata_eh_reset(struct ata_link *link, int classify,
2366 * reset and here. This race is mediated by cross checking 2473 * reset and here. This race is mediated by cross checking
2367 * link onlineness and classification result later. 2474 * link onlineness and classification result later.
2368 */ 2475 */
2369 if (postreset) 2476 if (postreset) {
2370 postreset(link, classes); 2477 postreset(link, classes);
2478 if (slave)
2479 postreset(slave, classes);
2480 }
2371 2481
2372 /* clear cached SError */ 2482 /* clear cached SError */
2373 spin_lock_irqsave(link->ap->lock, flags); 2483 spin_lock_irqsave(link->ap->lock, flags);
2374 link->eh_info.serror = 0; 2484 link->eh_info.serror = 0;
2485 if (slave)
2486 slave->eh_info.serror = 0;
2375 spin_unlock_irqrestore(link->ap->lock, flags); 2487 spin_unlock_irqrestore(link->ap->lock, flags);
2376 2488
2377 /* Make sure onlineness and classification result correspond. 2489 /* Make sure onlineness and classification result correspond.
@@ -2381,19 +2493,21 @@ int ata_eh_reset(struct ata_link *link, int classify,
2381 * link onlineness and classification result, those conditions 2493 * link onlineness and classification result, those conditions
2382 * can be reliably detected and retried. 2494 * can be reliably detected and retried.
2383 */ 2495 */
2384 nr_known = 0; 2496 nr_unknown = 0;
2385 ata_link_for_each_dev(dev, link) { 2497 ata_link_for_each_dev(dev, link) {
2386 /* convert all ATA_DEV_UNKNOWN to ATA_DEV_NONE */ 2498 /* convert all ATA_DEV_UNKNOWN to ATA_DEV_NONE */
2387 if (classes[dev->devno] == ATA_DEV_UNKNOWN) 2499 if (classes[dev->devno] == ATA_DEV_UNKNOWN) {
2388 classes[dev->devno] = ATA_DEV_NONE; 2500 classes[dev->devno] = ATA_DEV_NONE;
2389 else 2501 if (ata_phys_link_online(ata_dev_phys_link(dev)))
2390 nr_known++; 2502 nr_unknown++;
2503 }
2391 } 2504 }
2392 2505
2393 if (classify && !nr_known && ata_link_online(link)) { 2506 if (classify && nr_unknown) {
2394 if (try < max_tries) { 2507 if (try < max_tries) {
2395 ata_link_printk(link, KERN_WARNING, "link online but " 2508 ata_link_printk(link, KERN_WARNING, "link online but "
2396 "device misclassified, retrying\n"); 2509 "device misclassified, retrying\n");
2510 failed_link = link;
2397 rc = -EAGAIN; 2511 rc = -EAGAIN;
2398 goto fail; 2512 goto fail;
2399 } 2513 }
@@ -2404,6 +2518,8 @@ int ata_eh_reset(struct ata_link *link, int classify,
2404 2518
2405 /* reset successful, schedule revalidation */ 2519 /* reset successful, schedule revalidation */
2406 ata_eh_done(link, NULL, ATA_EH_RESET); 2520 ata_eh_done(link, NULL, ATA_EH_RESET);
2521 if (slave)
2522 ata_eh_done(slave, NULL, ATA_EH_RESET);
2407 ehc->last_reset = jiffies; 2523 ehc->last_reset = jiffies;
2408 ehc->i.action |= ATA_EH_REVALIDATE; 2524 ehc->i.action |= ATA_EH_REVALIDATE;
2409 2525
@@ -2411,6 +2527,8 @@ int ata_eh_reset(struct ata_link *link, int classify,
2411 out: 2527 out:
2412 /* clear hotplug flag */ 2528 /* clear hotplug flag */
2413 ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; 2529 ehc->i.flags &= ~ATA_EHI_HOTPLUGGED;
2530 if (slave)
2531 sehc->i.flags &= ~ATA_EHI_HOTPLUGGED;
2414 2532
2415 spin_lock_irqsave(ap->lock, flags); 2533 spin_lock_irqsave(ap->lock, flags);
2416 ap->pflags &= ~ATA_PFLAG_RESETTING; 2534 ap->pflags &= ~ATA_PFLAG_RESETTING;
@@ -2431,7 +2549,7 @@ int ata_eh_reset(struct ata_link *link, int classify,
2431 if (time_before(now, deadline)) { 2549 if (time_before(now, deadline)) {
2432 unsigned long delta = deadline - now; 2550 unsigned long delta = deadline - now;
2433 2551
2434 ata_link_printk(link, KERN_WARNING, 2552 ata_link_printk(failed_link, KERN_WARNING,
2435 "reset failed (errno=%d), retrying in %u secs\n", 2553 "reset failed (errno=%d), retrying in %u secs\n",
2436 rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); 2554 rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000));
2437 2555
@@ -2439,13 +2557,92 @@ int ata_eh_reset(struct ata_link *link, int classify,
2439 delta = schedule_timeout_uninterruptible(delta); 2557 delta = schedule_timeout_uninterruptible(delta);
2440 } 2558 }
2441 2559
2442 if (rc == -EPIPE || try == max_tries - 1) 2560 if (try == max_tries - 1) {
2443 sata_down_spd_limit(link); 2561 sata_down_spd_limit(link);
2562 if (slave)
2563 sata_down_spd_limit(slave);
2564 } else if (rc == -EPIPE)
2565 sata_down_spd_limit(failed_link);
2566
2444 if (hardreset) 2567 if (hardreset)
2445 reset = hardreset; 2568 reset = hardreset;
2446 goto retry; 2569 goto retry;
2447} 2570}
2448 2571
2572static inline void ata_eh_pull_park_action(struct ata_port *ap)
2573{
2574 struct ata_link *link;
2575 struct ata_device *dev;
2576 unsigned long flags;
2577
2578 /*
2579 * This function can be thought of as an extended version of
2580 * ata_eh_about_to_do() specially crafted to accommodate the
2581 * requirements of ATA_EH_PARK handling. Since the EH thread
2582 * does not leave the do {} while () loop in ata_eh_recover as
2583 * long as the timeout for a park request to *one* device on
2584 * the port has not expired, and since we still want to pick
2585 * up park requests to other devices on the same port or
2586 * timeout updates for the same device, we have to pull
2587 * ATA_EH_PARK actions from eh_info into eh_context.i
2588 * ourselves at the beginning of each pass over the loop.
2589 *
2590 * Additionally, all write accesses to &ap->park_req_pending
2591 * through INIT_COMPLETION() (see below) or complete_all()
2592 * (see ata_scsi_park_store()) are protected by the host lock.
2593 * As a result we have that park_req_pending.done is zero on
2594 * exit from this function, i.e. when ATA_EH_PARK actions for
2595 * *all* devices on port ap have been pulled into the
2596 * respective eh_context structs. If, and only if,
2597 * park_req_pending.done is non-zero by the time we reach
2598 * wait_for_completion_timeout(), another ATA_EH_PARK action
2599 * has been scheduled for at least one of the devices on port
2600 * ap and we have to cycle over the do {} while () loop in
2601 * ata_eh_recover() again.
2602 */
2603
2604 spin_lock_irqsave(ap->lock, flags);
2605 INIT_COMPLETION(ap->park_req_pending);
2606 ata_port_for_each_link(link, ap) {
2607 ata_link_for_each_dev(dev, link) {
2608 struct ata_eh_info *ehi = &link->eh_info;
2609
2610 link->eh_context.i.dev_action[dev->devno] |=
2611 ehi->dev_action[dev->devno] & ATA_EH_PARK;
2612 ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK);
2613 }
2614 }
2615 spin_unlock_irqrestore(ap->lock, flags);
2616}
2617
2618static void ata_eh_park_issue_cmd(struct ata_device *dev, int park)
2619{
2620 struct ata_eh_context *ehc = &dev->link->eh_context;
2621 struct ata_taskfile tf;
2622 unsigned int err_mask;
2623
2624 ata_tf_init(dev, &tf);
2625 if (park) {
2626 ehc->unloaded_mask |= 1 << dev->devno;
2627 tf.command = ATA_CMD_IDLEIMMEDIATE;
2628 tf.feature = 0x44;
2629 tf.lbal = 0x4c;
2630 tf.lbam = 0x4e;
2631 tf.lbah = 0x55;
2632 } else {
2633 ehc->unloaded_mask &= ~(1 << dev->devno);
2634 tf.command = ATA_CMD_CHK_POWER;
2635 }
2636
2637 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
2638 tf.protocol |= ATA_PROT_NODATA;
2639 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
2640 if (park && (err_mask || tf.lbal != 0xc4)) {
2641 ata_dev_printk(dev, KERN_ERR, "head unload failed!\n");
2642 ehc->unloaded_mask &= ~(1 << dev->devno);
2643 }
2644}
2645
2449static int ata_eh_revalidate_and_attach(struct ata_link *link, 2646static int ata_eh_revalidate_and_attach(struct ata_link *link,
2450 struct ata_device **r_failed_dev) 2647 struct ata_device **r_failed_dev)
2451{ 2648{
@@ -2472,7 +2669,7 @@ static int ata_eh_revalidate_and_attach(struct ata_link *link,
2472 if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { 2669 if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) {
2473 WARN_ON(dev->class == ATA_DEV_PMP); 2670 WARN_ON(dev->class == ATA_DEV_PMP);
2474 2671
2475 if (ata_link_offline(link)) { 2672 if (ata_phys_link_offline(ata_dev_phys_link(dev))) {
2476 rc = -EIO; 2673 rc = -EIO;
2477 goto err; 2674 goto err;
2478 } 2675 }
@@ -2610,6 +2807,53 @@ int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
2610 return rc; 2807 return rc;
2611} 2808}
2612 2809
2810/**
2811 * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset
2812 * @dev: ATAPI device to clear UA for
2813 *
2814 * Resets and other operations can make an ATAPI device raise
2815 * UNIT ATTENTION which causes the next operation to fail. This
2816 * function clears UA.
2817 *
2818 * LOCKING:
2819 * EH context (may sleep).
2820 *
2821 * RETURNS:
2822 * 0 on success, -errno on failure.
2823 */
2824static int atapi_eh_clear_ua(struct ata_device *dev)
2825{
2826 int i;
2827
2828 for (i = 0; i < ATA_EH_UA_TRIES; i++) {
2829 u8 sense_buffer[SCSI_SENSE_BUFFERSIZE];
2830 u8 sense_key = 0;
2831 unsigned int err_mask;
2832
2833 err_mask = atapi_eh_tur(dev, &sense_key);
2834 if (err_mask != 0 && err_mask != AC_ERR_DEV) {
2835 ata_dev_printk(dev, KERN_WARNING, "TEST_UNIT_READY "
2836 "failed (err_mask=0x%x)\n", err_mask);
2837 return -EIO;
2838 }
2839
2840 if (!err_mask || sense_key != UNIT_ATTENTION)
2841 return 0;
2842
2843 err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key);
2844 if (err_mask) {
2845 ata_dev_printk(dev, KERN_WARNING, "failed to clear "
2846 "UNIT ATTENTION (err_mask=0x%x)\n", err_mask);
2847 return -EIO;
2848 }
2849 }
2850
2851 ata_dev_printk(dev, KERN_WARNING,
2852 "UNIT ATTENTION persists after %d tries\n", ATA_EH_UA_TRIES);
2853
2854 return 0;
2855}
2856
2613static int ata_link_nr_enabled(struct ata_link *link) 2857static int ata_link_nr_enabled(struct ata_link *link)
2614{ 2858{
2615 struct ata_device *dev; 2859 struct ata_device *dev;
@@ -2697,7 +2941,7 @@ static int ata_eh_handle_dev_fail(struct ata_device *dev, int err)
2697 /* This is the last chance, better to slow 2941 /* This is the last chance, better to slow
2698 * down than lose it. 2942 * down than lose it.
2699 */ 2943 */
2700 sata_down_spd_limit(dev->link); 2944 sata_down_spd_limit(ata_dev_phys_link(dev));
2701 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); 2945 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2702 } 2946 }
2703 } 2947 }
@@ -2707,7 +2951,7 @@ static int ata_eh_handle_dev_fail(struct ata_device *dev, int err)
2707 ata_dev_disable(dev); 2951 ata_dev_disable(dev);
2708 2952
2709 /* detach if offline */ 2953 /* detach if offline */
2710 if (ata_link_offline(dev->link)) 2954 if (ata_phys_link_offline(ata_dev_phys_link(dev)))
2711 ata_eh_detach_dev(dev); 2955 ata_eh_detach_dev(dev);
2712 2956
2713 /* schedule probe if necessary */ 2957 /* schedule probe if necessary */
@@ -2755,7 +2999,7 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
2755 struct ata_device *dev; 2999 struct ata_device *dev;
2756 int nr_failed_devs; 3000 int nr_failed_devs;
2757 int rc; 3001 int rc;
2758 unsigned long flags; 3002 unsigned long flags, deadline;
2759 3003
2760 DPRINTK("ENTER\n"); 3004 DPRINTK("ENTER\n");
2761 3005
@@ -2829,6 +3073,56 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
2829 } 3073 }
2830 } 3074 }
2831 3075
3076 do {
3077 unsigned long now;
3078
3079 /*
3080 * clears ATA_EH_PARK in eh_info and resets
3081 * ap->park_req_pending
3082 */
3083 ata_eh_pull_park_action(ap);
3084
3085 deadline = jiffies;
3086 ata_port_for_each_link(link, ap) {
3087 ata_link_for_each_dev(dev, link) {
3088 struct ata_eh_context *ehc = &link->eh_context;
3089 unsigned long tmp;
3090
3091 if (dev->class != ATA_DEV_ATA)
3092 continue;
3093 if (!(ehc->i.dev_action[dev->devno] &
3094 ATA_EH_PARK))
3095 continue;
3096 tmp = dev->unpark_deadline;
3097 if (time_before(deadline, tmp))
3098 deadline = tmp;
3099 else if (time_before_eq(tmp, jiffies))
3100 continue;
3101 if (ehc->unloaded_mask & (1 << dev->devno))
3102 continue;
3103
3104 ata_eh_park_issue_cmd(dev, 1);
3105 }
3106 }
3107
3108 now = jiffies;
3109 if (time_before_eq(deadline, now))
3110 break;
3111
3112 deadline = wait_for_completion_timeout(&ap->park_req_pending,
3113 deadline - now);
3114 } while (deadline);
3115 ata_port_for_each_link(link, ap) {
3116 ata_link_for_each_dev(dev, link) {
3117 if (!(link->eh_context.unloaded_mask &
3118 (1 << dev->devno)))
3119 continue;
3120
3121 ata_eh_park_issue_cmd(dev, 0);
3122 ata_eh_done(link, dev, ATA_EH_PARK);
3123 }
3124 }
3125
2832 /* the rest */ 3126 /* the rest */
2833 ata_port_for_each_link(link, ap) { 3127 ata_port_for_each_link(link, ap) {
2834 struct ata_eh_context *ehc = &link->eh_context; 3128 struct ata_eh_context *ehc = &link->eh_context;
@@ -2852,6 +3146,20 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
2852 ehc->i.flags &= ~ATA_EHI_SETMODE; 3146 ehc->i.flags &= ~ATA_EHI_SETMODE;
2853 } 3147 }
2854 3148
3149 /* If reset has been issued, clear UA to avoid
3150 * disrupting the current users of the device.
3151 */
3152 if (ehc->i.flags & ATA_EHI_DID_RESET) {
3153 ata_link_for_each_dev(dev, link) {
3154 if (dev->class != ATA_DEV_ATAPI)
3155 continue;
3156 rc = atapi_eh_clear_ua(dev);
3157 if (rc)
3158 goto dev_fail;
3159 }
3160 }
3161
3162 /* configure link power saving */
2855 if (ehc->i.action & ATA_EH_LPM) 3163 if (ehc->i.action & ATA_EH_LPM)
2856 ata_link_for_each_dev(dev, link) 3164 ata_link_for_each_dev(dev, link)
2857 ata_dev_enable_pm(dev, ap->pm_policy); 3165 ata_dev_enable_pm(dev, ap->pm_policy);
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index b9d3ba423cb2..fccd5e496c62 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -183,6 +183,105 @@ DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
183 ata_scsi_lpm_show, ata_scsi_lpm_put); 183 ata_scsi_lpm_show, ata_scsi_lpm_put);
184EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy); 184EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
185 185
186static ssize_t ata_scsi_park_show(struct device *device,
187 struct device_attribute *attr, char *buf)
188{
189 struct scsi_device *sdev = to_scsi_device(device);
190 struct ata_port *ap;
191 struct ata_link *link;
192 struct ata_device *dev;
193 unsigned long flags;
194 unsigned int uninitialized_var(msecs);
195 int rc = 0;
196
197 ap = ata_shost_to_port(sdev->host);
198
199 spin_lock_irqsave(ap->lock, flags);
200 dev = ata_scsi_find_dev(ap, sdev);
201 if (!dev) {
202 rc = -ENODEV;
203 goto unlock;
204 }
205 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
206 rc = -EOPNOTSUPP;
207 goto unlock;
208 }
209
210 link = dev->link;
211 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
212 link->eh_context.unloaded_mask & (1 << dev->devno) &&
213 time_after(dev->unpark_deadline, jiffies))
214 msecs = jiffies_to_msecs(dev->unpark_deadline - jiffies);
215 else
216 msecs = 0;
217
218unlock:
219 spin_unlock_irq(ap->lock);
220
221 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
222}
223
224static ssize_t ata_scsi_park_store(struct device *device,
225 struct device_attribute *attr,
226 const char *buf, size_t len)
227{
228 struct scsi_device *sdev = to_scsi_device(device);
229 struct ata_port *ap;
230 struct ata_device *dev;
231 long int input;
232 unsigned long flags;
233 int rc;
234
235 rc = strict_strtol(buf, 10, &input);
236 if (rc || input < -2)
237 return -EINVAL;
238 if (input > ATA_TMOUT_MAX_PARK) {
239 rc = -EOVERFLOW;
240 input = ATA_TMOUT_MAX_PARK;
241 }
242
243 ap = ata_shost_to_port(sdev->host);
244
245 spin_lock_irqsave(ap->lock, flags);
246 dev = ata_scsi_find_dev(ap, sdev);
247 if (unlikely(!dev)) {
248 rc = -ENODEV;
249 goto unlock;
250 }
251 if (dev->class != ATA_DEV_ATA) {
252 rc = -EOPNOTSUPP;
253 goto unlock;
254 }
255
256 if (input >= 0) {
257 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
258 rc = -EOPNOTSUPP;
259 goto unlock;
260 }
261
262 dev->unpark_deadline = ata_deadline(jiffies, input);
263 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
264 ata_port_schedule_eh(ap);
265 complete(&ap->park_req_pending);
266 } else {
267 switch (input) {
268 case -1:
269 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
270 break;
271 case -2:
272 dev->flags |= ATA_DFLAG_NO_UNLOAD;
273 break;
274 }
275 }
276unlock:
277 spin_unlock_irqrestore(ap->lock, flags);
278
279 return rc ? rc : len;
280}
281DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
282 ata_scsi_park_show, ata_scsi_park_store);
283EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
284
186static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) 285static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
187{ 286{
188 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 287 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
@@ -269,6 +368,12 @@ DEVICE_ATTR(sw_activity, S_IWUGO | S_IRUGO, ata_scsi_activity_show,
269 ata_scsi_activity_store); 368 ata_scsi_activity_store);
270EXPORT_SYMBOL_GPL(dev_attr_sw_activity); 369EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
271 370
371struct device_attribute *ata_common_sdev_attrs[] = {
372 &dev_attr_unload_heads,
373 NULL
374};
375EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
376
272static void ata_scsi_invalid_field(struct scsi_cmnd *cmd, 377static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
273 void (*done)(struct scsi_cmnd *)) 378 void (*done)(struct scsi_cmnd *))
274{ 379{
@@ -954,6 +1059,9 @@ static int atapi_drain_needed(struct request *rq)
954static int ata_scsi_dev_config(struct scsi_device *sdev, 1059static int ata_scsi_dev_config(struct scsi_device *sdev,
955 struct ata_device *dev) 1060 struct ata_device *dev)
956{ 1061{
1062 if (!ata_id_has_unload(dev->id))
1063 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1064
957 /* configure max sectors */ 1065 /* configure max sectors */
958 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors); 1066 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
959 1067
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index ade5c75b6144..e96de96e3020 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -70,6 +70,7 @@ extern int atapi_passthru16;
70extern int libata_fua; 70extern int libata_fua;
71extern int libata_noacpi; 71extern int libata_noacpi;
72extern int libata_allow_tpm; 72extern int libata_allow_tpm;
73extern struct ata_link *ata_dev_phys_link(struct ata_device *dev);
73extern void ata_force_cbl(struct ata_port *ap); 74extern void ata_force_cbl(struct ata_port *ap);
74extern u64 ata_tf_to_lba(const struct ata_taskfile *tf); 75extern u64 ata_tf_to_lba(const struct ata_taskfile *tf);
75extern u64 ata_tf_to_lba48(const struct ata_taskfile *tf); 76extern u64 ata_tf_to_lba48(const struct ata_taskfile *tf);
@@ -107,6 +108,8 @@ extern void ata_qc_issue(struct ata_queued_cmd *qc);
107extern void __ata_qc_complete(struct ata_queued_cmd *qc); 108extern void __ata_qc_complete(struct ata_queued_cmd *qc);
108extern int atapi_check_dma(struct ata_queued_cmd *qc); 109extern int atapi_check_dma(struct ata_queued_cmd *qc);
109extern void swap_buf_le16(u16 *buf, unsigned int buf_words); 110extern void swap_buf_le16(u16 *buf, unsigned int buf_words);
111extern bool ata_phys_link_online(struct ata_link *link);
112extern bool ata_phys_link_offline(struct ata_link *link);
110extern void ata_dev_init(struct ata_device *dev); 113extern void ata_dev_init(struct ata_device *dev);
111extern void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp); 114extern void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp);
112extern int sata_link_init_spd(struct ata_link *link); 115extern int sata_link_init_spd(struct ata_link *link);
diff --git a/drivers/ata/pata_bf54x.c b/drivers/ata/pata_bf54x.c
index d3932901a3b3..1266924c11f9 100644
--- a/drivers/ata/pata_bf54x.c
+++ b/drivers/ata/pata_bf54x.c
@@ -1632,6 +1632,8 @@ static int __devinit bfin_atapi_probe(struct platform_device *pdev)
1632 return -ENODEV; 1632 return -ENODEV;
1633 } 1633 }
1634 1634
1635 dev_set_drvdata(&pdev->dev, host);
1636
1635 return 0; 1637 return 0;
1636} 1638}
1637 1639
@@ -1648,6 +1650,7 @@ static int __devexit bfin_atapi_remove(struct platform_device *pdev)
1648 struct ata_host *host = dev_get_drvdata(dev); 1650 struct ata_host *host = dev_get_drvdata(dev);
1649 1651
1650 ata_host_detach(host); 1652 ata_host_detach(host);
1653 dev_set_drvdata(&pdev->dev, NULL);
1651 1654
1652 peripheral_free_list(atapi_io_port); 1655 peripheral_free_list(atapi_io_port);
1653 1656
@@ -1655,27 +1658,44 @@ static int __devexit bfin_atapi_remove(struct platform_device *pdev)
1655} 1658}
1656 1659
1657#ifdef CONFIG_PM 1660#ifdef CONFIG_PM
1658int bfin_atapi_suspend(struct platform_device *pdev, pm_message_t state) 1661static int bfin_atapi_suspend(struct platform_device *pdev, pm_message_t state)
1659{ 1662{
1660 return 0; 1663 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1664 if (host)
1665 return ata_host_suspend(host, state);
1666 else
1667 return 0;
1661} 1668}
1662 1669
1663int bfin_atapi_resume(struct platform_device *pdev) 1670static int bfin_atapi_resume(struct platform_device *pdev)
1664{ 1671{
1672 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1673 int ret;
1674
1675 if (host) {
1676 ret = bfin_reset_controller(host);
1677 if (ret) {
1678 printk(KERN_ERR DRV_NAME ": Error during HW init\n");
1679 return ret;
1680 }
1681 ata_host_resume(host);
1682 }
1683
1665 return 0; 1684 return 0;
1666} 1685}
1686#else
1687#define bfin_atapi_suspend NULL
1688#define bfin_atapi_resume NULL
1667#endif 1689#endif
1668 1690
1669static struct platform_driver bfin_atapi_driver = { 1691static struct platform_driver bfin_atapi_driver = {
1670 .probe = bfin_atapi_probe, 1692 .probe = bfin_atapi_probe,
1671 .remove = __devexit_p(bfin_atapi_remove), 1693 .remove = __devexit_p(bfin_atapi_remove),
1694 .suspend = bfin_atapi_suspend,
1695 .resume = bfin_atapi_resume,
1672 .driver = { 1696 .driver = {
1673 .name = DRV_NAME, 1697 .name = DRV_NAME,
1674 .owner = THIS_MODULE, 1698 .owner = THIS_MODULE,
1675#ifdef CONFIG_PM
1676 .suspend = bfin_atapi_suspend,
1677 .resume = bfin_atapi_resume,
1678#endif
1679 }, 1699 },
1680}; 1700};
1681 1701
diff --git a/drivers/ata/pata_sil680.c b/drivers/ata/pata_sil680.c
index e970b227fbce..a598bb36aafc 100644
--- a/drivers/ata/pata_sil680.c
+++ b/drivers/ata/pata_sil680.c
@@ -230,7 +230,7 @@ static u8 sil680_init_chip(struct pci_dev *pdev, int *try_mmio)
230 tmpbyte & 1, tmpbyte & 0x30); 230 tmpbyte & 1, tmpbyte & 0x30);
231 231
232 *try_mmio = 0; 232 *try_mmio = 0;
233#ifdef CONFIG_PPC_MERGE 233#ifdef CONFIG_PPC
234 if (machine_is(cell)) 234 if (machine_is(cell))
235 *try_mmio = (tmpbyte & 1) || pci_resource_start(pdev, 5); 235 *try_mmio = (tmpbyte & 1) || pci_resource_start(pdev, 5);
236#endif 236#endif
diff --git a/drivers/ata/sata_fsl.c b/drivers/ata/sata_fsl.c
index 3924e7209a44..1a56db92ff7a 100644
--- a/drivers/ata/sata_fsl.c
+++ b/drivers/ata/sata_fsl.c
@@ -469,10 +469,10 @@ static bool sata_fsl_qc_fill_rtf(struct ata_queued_cmd *qc)
469 return true; 469 return true;
470} 470}
471 471
472static int sata_fsl_scr_write(struct ata_port *ap, unsigned int sc_reg_in, 472static int sata_fsl_scr_write(struct ata_link *link,
473 u32 val) 473 unsigned int sc_reg_in, u32 val)
474{ 474{
475 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 475 struct sata_fsl_host_priv *host_priv = link->ap->host->private_data;
476 void __iomem *ssr_base = host_priv->ssr_base; 476 void __iomem *ssr_base = host_priv->ssr_base;
477 unsigned int sc_reg; 477 unsigned int sc_reg;
478 478
@@ -493,10 +493,10 @@ static int sata_fsl_scr_write(struct ata_port *ap, unsigned int sc_reg_in,
493 return 0; 493 return 0;
494} 494}
495 495
496static int sata_fsl_scr_read(struct ata_port *ap, unsigned int sc_reg_in, 496static int sata_fsl_scr_read(struct ata_link *link,
497 u32 *val) 497 unsigned int sc_reg_in, u32 *val)
498{ 498{
499 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 499 struct sata_fsl_host_priv *host_priv = link->ap->host->private_data;
500 void __iomem *ssr_base = host_priv->ssr_base; 500 void __iomem *ssr_base = host_priv->ssr_base;
501 unsigned int sc_reg; 501 unsigned int sc_reg;
502 502
@@ -645,12 +645,12 @@ static int sata_fsl_port_start(struct ata_port *ap)
645 * Workaround for 8315DS board 3gbps link-up issue, 645 * Workaround for 8315DS board 3gbps link-up issue,
646 * currently limit SATA port to GEN1 speed 646 * currently limit SATA port to GEN1 speed
647 */ 647 */
648 sata_fsl_scr_read(ap, SCR_CONTROL, &temp); 648 sata_fsl_scr_read(&ap->link, SCR_CONTROL, &temp);
649 temp &= ~(0xF << 4); 649 temp &= ~(0xF << 4);
650 temp |= (0x1 << 4); 650 temp |= (0x1 << 4);
651 sata_fsl_scr_write(ap, SCR_CONTROL, temp); 651 sata_fsl_scr_write(&ap->link, SCR_CONTROL, temp);
652 652
653 sata_fsl_scr_read(ap, SCR_CONTROL, &temp); 653 sata_fsl_scr_read(&ap->link, SCR_CONTROL, &temp);
654 dev_printk(KERN_WARNING, dev, "scr_control, speed limited to %x\n", 654 dev_printk(KERN_WARNING, dev, "scr_control, speed limited to %x\n",
655 temp); 655 temp);
656#endif 656#endif
@@ -868,7 +868,7 @@ issue_srst:
868 ioread32(CQ + hcr_base), 868 ioread32(CQ + hcr_base),
869 ioread32(CA + hcr_base), ioread32(CC + hcr_base)); 869 ioread32(CA + hcr_base), ioread32(CC + hcr_base));
870 870
871 sata_fsl_scr_read(ap, SCR_ERROR, &Serror); 871 sata_fsl_scr_read(&ap->link, SCR_ERROR, &Serror);
872 872
873 DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS)); 873 DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
874 DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL)); 874 DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
@@ -972,9 +972,9 @@ static void sata_fsl_error_intr(struct ata_port *ap)
972 * Handle & Clear SError 972 * Handle & Clear SError
973 */ 973 */
974 974
975 sata_fsl_scr_read(ap, SCR_ERROR, &SError); 975 sata_fsl_scr_read(&ap->link, SCR_ERROR, &SError);
976 if (unlikely(SError & 0xFFFF0000)) { 976 if (unlikely(SError & 0xFFFF0000)) {
977 sata_fsl_scr_write(ap, SCR_ERROR, SError); 977 sata_fsl_scr_write(&ap->link, SCR_ERROR, SError);
978 } 978 }
979 979
980 DPRINTK("error_intr,hStat=0x%x,CE=0x%x,DE =0x%x,SErr=0x%x\n", 980 DPRINTK("error_intr,hStat=0x%x,CE=0x%x,DE =0x%x,SErr=0x%x\n",
@@ -1091,7 +1091,7 @@ static void sata_fsl_host_intr(struct ata_port *ap)
1091 1091
1092 hstatus = ioread32(hcr_base + HSTATUS); 1092 hstatus = ioread32(hcr_base + HSTATUS);
1093 1093
1094 sata_fsl_scr_read(ap, SCR_ERROR, &SError); 1094 sata_fsl_scr_read(&ap->link, SCR_ERROR, &SError);
1095 1095
1096 if (unlikely(SError & 0xFFFF0000)) { 1096 if (unlikely(SError & 0xFFFF0000)) {
1097 DPRINTK("serror @host_intr : 0x%x\n", SError); 1097 DPRINTK("serror @host_intr : 0x%x\n", SError);
diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c
index 5032c32fa505..fbbd87c96f10 100644
--- a/drivers/ata/sata_inic162x.c
+++ b/drivers/ata/sata_inic162x.c
@@ -269,9 +269,9 @@ static void inic_reset_port(void __iomem *port_base)
269 writeb(0xff, port_base + PORT_IRQ_STAT); 269 writeb(0xff, port_base + PORT_IRQ_STAT);
270} 270}
271 271
272static int inic_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val) 272static int inic_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val)
273{ 273{
274 void __iomem *scr_addr = inic_port_base(ap) + PORT_SCR; 274 void __iomem *scr_addr = inic_port_base(link->ap) + PORT_SCR;
275 void __iomem *addr; 275 void __iomem *addr;
276 276
277 if (unlikely(sc_reg >= ARRAY_SIZE(scr_map))) 277 if (unlikely(sc_reg >= ARRAY_SIZE(scr_map)))
@@ -286,9 +286,9 @@ static int inic_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val)
286 return 0; 286 return 0;
287} 287}
288 288
289static int inic_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val) 289static int inic_scr_write(struct ata_link *link, unsigned sc_reg, u32 val)
290{ 290{
291 void __iomem *scr_addr = inic_port_base(ap) + PORT_SCR; 291 void __iomem *scr_addr = inic_port_base(link->ap) + PORT_SCR;
292 292
293 if (unlikely(sc_reg >= ARRAY_SIZE(scr_map))) 293 if (unlikely(sc_reg >= ARRAY_SIZE(scr_map)))
294 return -EINVAL; 294 return -EINVAL;
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index c815f8ecf6e6..2b24ae58b52e 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -493,10 +493,10 @@ struct mv_hw_ops {
493 void (*reset_bus)(struct ata_host *host, void __iomem *mmio); 493 void (*reset_bus)(struct ata_host *host, void __iomem *mmio);
494}; 494};
495 495
496static int mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val); 496static int mv_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val);
497static int mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val); 497static int mv_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val);
498static int mv5_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val); 498static int mv5_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val);
499static int mv5_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val); 499static int mv5_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val);
500static int mv_port_start(struct ata_port *ap); 500static int mv_port_start(struct ata_port *ap);
501static void mv_port_stop(struct ata_port *ap); 501static void mv_port_stop(struct ata_port *ap);
502static int mv_qc_defer(struct ata_queued_cmd *qc); 502static int mv_qc_defer(struct ata_queued_cmd *qc);
@@ -1070,23 +1070,23 @@ static unsigned int mv_scr_offset(unsigned int sc_reg_in)
1070 return ofs; 1070 return ofs;
1071} 1071}
1072 1072
1073static int mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val) 1073static int mv_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val)
1074{ 1074{
1075 unsigned int ofs = mv_scr_offset(sc_reg_in); 1075 unsigned int ofs = mv_scr_offset(sc_reg_in);
1076 1076
1077 if (ofs != 0xffffffffU) { 1077 if (ofs != 0xffffffffU) {
1078 *val = readl(mv_ap_base(ap) + ofs); 1078 *val = readl(mv_ap_base(link->ap) + ofs);
1079 return 0; 1079 return 0;
1080 } else 1080 } else
1081 return -EINVAL; 1081 return -EINVAL;
1082} 1082}
1083 1083
1084static int mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val) 1084static int mv_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val)
1085{ 1085{
1086 unsigned int ofs = mv_scr_offset(sc_reg_in); 1086 unsigned int ofs = mv_scr_offset(sc_reg_in);
1087 1087
1088 if (ofs != 0xffffffffU) { 1088 if (ofs != 0xffffffffU) {
1089 writelfl(val, mv_ap_base(ap) + ofs); 1089 writelfl(val, mv_ap_base(link->ap) + ofs);
1090 return 0; 1090 return 0;
1091 } else 1091 } else
1092 return -EINVAL; 1092 return -EINVAL;
@@ -2251,11 +2251,11 @@ static unsigned int mv5_scr_offset(unsigned int sc_reg_in)
2251 return ofs; 2251 return ofs;
2252} 2252}
2253 2253
2254static int mv5_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val) 2254static int mv5_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val)
2255{ 2255{
2256 struct mv_host_priv *hpriv = ap->host->private_data; 2256 struct mv_host_priv *hpriv = link->ap->host->private_data;
2257 void __iomem *mmio = hpriv->base; 2257 void __iomem *mmio = hpriv->base;
2258 void __iomem *addr = mv5_phy_base(mmio, ap->port_no); 2258 void __iomem *addr = mv5_phy_base(mmio, link->ap->port_no);
2259 unsigned int ofs = mv5_scr_offset(sc_reg_in); 2259 unsigned int ofs = mv5_scr_offset(sc_reg_in);
2260 2260
2261 if (ofs != 0xffffffffU) { 2261 if (ofs != 0xffffffffU) {
@@ -2265,11 +2265,11 @@ static int mv5_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val)
2265 return -EINVAL; 2265 return -EINVAL;
2266} 2266}
2267 2267
2268static int mv5_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val) 2268static int mv5_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val)
2269{ 2269{
2270 struct mv_host_priv *hpriv = ap->host->private_data; 2270 struct mv_host_priv *hpriv = link->ap->host->private_data;
2271 void __iomem *mmio = hpriv->base; 2271 void __iomem *mmio = hpriv->base;
2272 void __iomem *addr = mv5_phy_base(mmio, ap->port_no); 2272 void __iomem *addr = mv5_phy_base(mmio, link->ap->port_no);
2273 unsigned int ofs = mv5_scr_offset(sc_reg_in); 2273 unsigned int ofs = mv5_scr_offset(sc_reg_in);
2274 2274
2275 if (ofs != 0xffffffffU) { 2275 if (ofs != 0xffffffffU) {
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 14601dc05e41..fae3841de0d8 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -302,8 +302,8 @@ static void nv_ck804_host_stop(struct ata_host *host);
302static irqreturn_t nv_generic_interrupt(int irq, void *dev_instance); 302static irqreturn_t nv_generic_interrupt(int irq, void *dev_instance);
303static irqreturn_t nv_nf2_interrupt(int irq, void *dev_instance); 303static irqreturn_t nv_nf2_interrupt(int irq, void *dev_instance);
304static irqreturn_t nv_ck804_interrupt(int irq, void *dev_instance); 304static irqreturn_t nv_ck804_interrupt(int irq, void *dev_instance);
305static int nv_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val); 305static int nv_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
306static int nv_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val); 306static int nv_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
307 307
308static void nv_nf2_freeze(struct ata_port *ap); 308static void nv_nf2_freeze(struct ata_port *ap);
309static void nv_nf2_thaw(struct ata_port *ap); 309static void nv_nf2_thaw(struct ata_port *ap);
@@ -1511,21 +1511,21 @@ static irqreturn_t nv_ck804_interrupt(int irq, void *dev_instance)
1511 return ret; 1511 return ret;
1512} 1512}
1513 1513
1514static int nv_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) 1514static int nv_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
1515{ 1515{
1516 if (sc_reg > SCR_CONTROL) 1516 if (sc_reg > SCR_CONTROL)
1517 return -EINVAL; 1517 return -EINVAL;
1518 1518
1519 *val = ioread32(ap->ioaddr.scr_addr + (sc_reg * 4)); 1519 *val = ioread32(link->ap->ioaddr.scr_addr + (sc_reg * 4));
1520 return 0; 1520 return 0;
1521} 1521}
1522 1522
1523static int nv_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) 1523static int nv_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
1524{ 1524{
1525 if (sc_reg > SCR_CONTROL) 1525 if (sc_reg > SCR_CONTROL)
1526 return -EINVAL; 1526 return -EINVAL;
1527 1527
1528 iowrite32(val, ap->ioaddr.scr_addr + (sc_reg * 4)); 1528 iowrite32(val, link->ap->ioaddr.scr_addr + (sc_reg * 4));
1529 return 0; 1529 return 0;
1530} 1530}
1531 1531
@@ -2218,9 +2218,9 @@ static void nv_swncq_host_interrupt(struct ata_port *ap, u16 fis)
2218 if (!pp->qc_active) 2218 if (!pp->qc_active)
2219 return; 2219 return;
2220 2220
2221 if (ap->ops->scr_read(ap, SCR_ERROR, &serror)) 2221 if (ap->ops->scr_read(&ap->link, SCR_ERROR, &serror))
2222 return; 2222 return;
2223 ap->ops->scr_write(ap, SCR_ERROR, serror); 2223 ap->ops->scr_write(&ap->link, SCR_ERROR, serror);
2224 2224
2225 if (ata_stat & ATA_ERR) { 2225 if (ata_stat & ATA_ERR) {
2226 ata_ehi_clear_desc(ehi); 2226 ata_ehi_clear_desc(ehi);
diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c
index 030665ba76b7..750d8cdc00cd 100644
--- a/drivers/ata/sata_promise.c
+++ b/drivers/ata/sata_promise.c
@@ -137,8 +137,8 @@ struct pdc_port_priv {
137 dma_addr_t pkt_dma; 137 dma_addr_t pkt_dma;
138}; 138};
139 139
140static int pdc_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val); 140static int pdc_sata_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
141static int pdc_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val); 141static int pdc_sata_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
142static int pdc_ata_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); 142static int pdc_ata_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
143static int pdc_common_port_start(struct ata_port *ap); 143static int pdc_common_port_start(struct ata_port *ap);
144static int pdc_sata_port_start(struct ata_port *ap); 144static int pdc_sata_port_start(struct ata_port *ap);
@@ -386,19 +386,21 @@ static int pdc_sata_cable_detect(struct ata_port *ap)
386 return ATA_CBL_SATA; 386 return ATA_CBL_SATA;
387} 387}
388 388
389static int pdc_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) 389static int pdc_sata_scr_read(struct ata_link *link,
390 unsigned int sc_reg, u32 *val)
390{ 391{
391 if (sc_reg > SCR_CONTROL) 392 if (sc_reg > SCR_CONTROL)
392 return -EINVAL; 393 return -EINVAL;
393 *val = readl(ap->ioaddr.scr_addr + (sc_reg * 4)); 394 *val = readl(link->ap->ioaddr.scr_addr + (sc_reg * 4));
394 return 0; 395 return 0;
395} 396}
396 397
397static int pdc_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) 398static int pdc_sata_scr_write(struct ata_link *link,
399 unsigned int sc_reg, u32 val)
398{ 400{
399 if (sc_reg > SCR_CONTROL) 401 if (sc_reg > SCR_CONTROL)
400 return -EINVAL; 402 return -EINVAL;
401 writel(val, ap->ioaddr.scr_addr + (sc_reg * 4)); 403 writel(val, link->ap->ioaddr.scr_addr + (sc_reg * 4));
402 return 0; 404 return 0;
403} 405}
404 406
@@ -731,7 +733,7 @@ static void pdc_error_intr(struct ata_port *ap, struct ata_queued_cmd *qc,
731 if (sata_scr_valid(&ap->link)) { 733 if (sata_scr_valid(&ap->link)) {
732 u32 serror; 734 u32 serror;
733 735
734 pdc_sata_scr_read(ap, SCR_ERROR, &serror); 736 pdc_sata_scr_read(&ap->link, SCR_ERROR, &serror);
735 ehi->serror |= serror; 737 ehi->serror |= serror;
736 } 738 }
737 739
diff --git a/drivers/ata/sata_qstor.c b/drivers/ata/sata_qstor.c
index 1600107047cf..a000c86ac859 100644
--- a/drivers/ata/sata_qstor.c
+++ b/drivers/ata/sata_qstor.c
@@ -111,8 +111,8 @@ struct qs_port_priv {
111 qs_state_t state; 111 qs_state_t state;
112}; 112};
113 113
114static int qs_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val); 114static int qs_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
115static int qs_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val); 115static int qs_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
116static int qs_ata_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); 116static int qs_ata_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
117static int qs_port_start(struct ata_port *ap); 117static int qs_port_start(struct ata_port *ap);
118static void qs_host_stop(struct ata_host *host); 118static void qs_host_stop(struct ata_host *host);
@@ -242,11 +242,11 @@ static int qs_prereset(struct ata_link *link, unsigned long deadline)
242 return ata_sff_prereset(link, deadline); 242 return ata_sff_prereset(link, deadline);
243} 243}
244 244
245static int qs_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) 245static int qs_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
246{ 246{
247 if (sc_reg > SCR_CONTROL) 247 if (sc_reg > SCR_CONTROL)
248 return -EINVAL; 248 return -EINVAL;
249 *val = readl(ap->ioaddr.scr_addr + (sc_reg * 8)); 249 *val = readl(link->ap->ioaddr.scr_addr + (sc_reg * 8));
250 return 0; 250 return 0;
251} 251}
252 252
@@ -256,11 +256,11 @@ static void qs_error_handler(struct ata_port *ap)
256 ata_std_error_handler(ap); 256 ata_std_error_handler(ap);
257} 257}
258 258
259static int qs_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) 259static int qs_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
260{ 260{
261 if (sc_reg > SCR_CONTROL) 261 if (sc_reg > SCR_CONTROL)
262 return -EINVAL; 262 return -EINVAL;
263 writel(val, ap->ioaddr.scr_addr + (sc_reg * 8)); 263 writel(val, link->ap->ioaddr.scr_addr + (sc_reg * 8));
264 return 0; 264 return 0;
265} 265}
266 266
diff --git a/drivers/ata/sata_sil.c b/drivers/ata/sata_sil.c
index 88bf4212590f..031d7b7dee34 100644
--- a/drivers/ata/sata_sil.c
+++ b/drivers/ata/sata_sil.c
@@ -115,8 +115,8 @@ static int sil_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
115static int sil_pci_device_resume(struct pci_dev *pdev); 115static int sil_pci_device_resume(struct pci_dev *pdev);
116#endif 116#endif
117static void sil_dev_config(struct ata_device *dev); 117static void sil_dev_config(struct ata_device *dev);
118static int sil_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val); 118static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
119static int sil_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val); 119static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
120static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed); 120static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed);
121static void sil_freeze(struct ata_port *ap); 121static void sil_freeze(struct ata_port *ap);
122static void sil_thaw(struct ata_port *ap); 122static void sil_thaw(struct ata_port *ap);
@@ -317,9 +317,9 @@ static inline void __iomem *sil_scr_addr(struct ata_port *ap,
317 return NULL; 317 return NULL;
318} 318}
319 319
320static int sil_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) 320static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
321{ 321{
322 void __iomem *mmio = sil_scr_addr(ap, sc_reg); 322 void __iomem *mmio = sil_scr_addr(link->ap, sc_reg);
323 323
324 if (mmio) { 324 if (mmio) {
325 *val = readl(mmio); 325 *val = readl(mmio);
@@ -328,9 +328,9 @@ static int sil_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
328 return -EINVAL; 328 return -EINVAL;
329} 329}
330 330
331static int sil_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) 331static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
332{ 332{
333 void __iomem *mmio = sil_scr_addr(ap, sc_reg); 333 void __iomem *mmio = sil_scr_addr(link->ap, sc_reg);
334 334
335 if (mmio) { 335 if (mmio) {
336 writel(val, mmio); 336 writel(val, mmio);
@@ -352,8 +352,8 @@ static void sil_host_intr(struct ata_port *ap, u32 bmdma2)
352 * controllers continue to assert IRQ as long as 352 * controllers continue to assert IRQ as long as
353 * SError bits are pending. Clear SError immediately. 353 * SError bits are pending. Clear SError immediately.
354 */ 354 */
355 sil_scr_read(ap, SCR_ERROR, &serror); 355 sil_scr_read(&ap->link, SCR_ERROR, &serror);
356 sil_scr_write(ap, SCR_ERROR, serror); 356 sil_scr_write(&ap->link, SCR_ERROR, serror);
357 357
358 /* Sometimes spurious interrupts occur, double check 358 /* Sometimes spurious interrupts occur, double check
359 * it's PHYRDY CHG. 359 * it's PHYRDY CHG.
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 84ffcc26a74b..4621807a1a6a 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -340,8 +340,8 @@ struct sil24_port_priv {
340}; 340};
341 341
342static void sil24_dev_config(struct ata_device *dev); 342static void sil24_dev_config(struct ata_device *dev);
343static int sil24_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val); 343static int sil24_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val);
344static int sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val); 344static int sil24_scr_write(struct ata_link *link, unsigned sc_reg, u32 val);
345static int sil24_qc_defer(struct ata_queued_cmd *qc); 345static int sil24_qc_defer(struct ata_queued_cmd *qc);
346static void sil24_qc_prep(struct ata_queued_cmd *qc); 346static void sil24_qc_prep(struct ata_queued_cmd *qc);
347static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc); 347static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc);
@@ -504,9 +504,9 @@ static int sil24_scr_map[] = {
504 [SCR_ACTIVE] = 3, 504 [SCR_ACTIVE] = 3,
505}; 505};
506 506
507static int sil24_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val) 507static int sil24_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val)
508{ 508{
509 void __iomem *scr_addr = sil24_port_base(ap) + PORT_SCONTROL; 509 void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL;
510 510
511 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { 511 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
512 void __iomem *addr; 512 void __iomem *addr;
@@ -517,9 +517,9 @@ static int sil24_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val)
517 return -EINVAL; 517 return -EINVAL;
518} 518}
519 519
520static int sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val) 520static int sil24_scr_write(struct ata_link *link, unsigned sc_reg, u32 val)
521{ 521{
522 void __iomem *scr_addr = sil24_port_base(ap) + PORT_SCONTROL; 522 void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL;
523 523
524 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { 524 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
525 void __iomem *addr; 525 void __iomem *addr;
diff --git a/drivers/ata/sata_sis.c b/drivers/ata/sata_sis.c
index 1010b3069bd5..9c43b4e7c4a6 100644
--- a/drivers/ata/sata_sis.c
+++ b/drivers/ata/sata_sis.c
@@ -64,8 +64,8 @@ enum {
64}; 64};
65 65
66static int sis_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); 66static int sis_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
67static int sis_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val); 67static int sis_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
68static int sis_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val); 68static int sis_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
69 69
70static const struct pci_device_id sis_pci_tbl[] = { 70static const struct pci_device_id sis_pci_tbl[] = {
71 { PCI_VDEVICE(SI, 0x0180), sis_180 }, /* SiS 964/180 */ 71 { PCI_VDEVICE(SI, 0x0180), sis_180 }, /* SiS 964/180 */
@@ -134,10 +134,11 @@ static unsigned int get_scr_cfg_addr(struct ata_port *ap, unsigned int sc_reg)
134 return addr; 134 return addr;
135} 135}
136 136
137static u32 sis_scr_cfg_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) 137static u32 sis_scr_cfg_read(struct ata_link *link,
138 unsigned int sc_reg, u32 *val)
138{ 139{
139 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 140 struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
140 unsigned int cfg_addr = get_scr_cfg_addr(ap, sc_reg); 141 unsigned int cfg_addr = get_scr_cfg_addr(link->ap, sc_reg);
141 u32 val2 = 0; 142 u32 val2 = 0;
142 u8 pmr; 143 u8 pmr;
143 144
@@ -158,10 +159,11 @@ static u32 sis_scr_cfg_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
158 return 0; 159 return 0;
159} 160}
160 161
161static int sis_scr_cfg_write(struct ata_port *ap, unsigned int sc_reg, u32 val) 162static int sis_scr_cfg_write(struct ata_link *link,
163 unsigned int sc_reg, u32 val)
162{ 164{
163 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 165 struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
164 unsigned int cfg_addr = get_scr_cfg_addr(ap, sc_reg); 166 unsigned int cfg_addr = get_scr_cfg_addr(link->ap, sc_reg);
165 u8 pmr; 167 u8 pmr;
166 168
167 if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */ 169 if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
@@ -178,8 +180,9 @@ static int sis_scr_cfg_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
178 return 0; 180 return 0;
179} 181}
180 182
181static int sis_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) 183static int sis_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
182{ 184{
185 struct ata_port *ap = link->ap;
183 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 186 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
184 u8 pmr; 187 u8 pmr;
185 188
@@ -187,7 +190,7 @@ static int sis_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
187 return -EINVAL; 190 return -EINVAL;
188 191
189 if (ap->flags & SIS_FLAG_CFGSCR) 192 if (ap->flags & SIS_FLAG_CFGSCR)
190 return sis_scr_cfg_read(ap, sc_reg, val); 193 return sis_scr_cfg_read(link, sc_reg, val);
191 194
192 pci_read_config_byte(pdev, SIS_PMR, &pmr); 195 pci_read_config_byte(pdev, SIS_PMR, &pmr);
193 196
@@ -202,8 +205,9 @@ static int sis_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
202 return 0; 205 return 0;
203} 206}
204 207
205static int sis_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) 208static int sis_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
206{ 209{
210 struct ata_port *ap = link->ap;
207 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 211 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
208 u8 pmr; 212 u8 pmr;
209 213
@@ -213,7 +217,7 @@ static int sis_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
213 pci_read_config_byte(pdev, SIS_PMR, &pmr); 217 pci_read_config_byte(pdev, SIS_PMR, &pmr);
214 218
215 if (ap->flags & SIS_FLAG_CFGSCR) 219 if (ap->flags & SIS_FLAG_CFGSCR)
216 return sis_scr_cfg_write(ap, sc_reg, val); 220 return sis_scr_cfg_write(link, sc_reg, val);
217 else { 221 else {
218 iowrite32(val, ap->ioaddr.scr_addr + (sc_reg * 4)); 222 iowrite32(val, ap->ioaddr.scr_addr + (sc_reg * 4));
219 if ((pdev->device == 0x0182) || (pdev->device == 0x0183) || 223 if ((pdev->device == 0x0182) || (pdev->device == 0x0183) ||
diff --git a/drivers/ata/sata_svw.c b/drivers/ata/sata_svw.c
index fb13b82aacba..609d147813ae 100644
--- a/drivers/ata/sata_svw.c
+++ b/drivers/ata/sata_svw.c
@@ -123,20 +123,22 @@ static int k2_sata_check_atapi_dma(struct ata_queued_cmd *qc)
123 } 123 }
124} 124}
125 125
126static int k2_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) 126static int k2_sata_scr_read(struct ata_link *link,
127 unsigned int sc_reg, u32 *val)
127{ 128{
128 if (sc_reg > SCR_CONTROL) 129 if (sc_reg > SCR_CONTROL)
129 return -EINVAL; 130 return -EINVAL;
130 *val = readl(ap->ioaddr.scr_addr + (sc_reg * 4)); 131 *val = readl(link->ap->ioaddr.scr_addr + (sc_reg * 4));
131 return 0; 132 return 0;
132} 133}
133 134
134 135
135static int k2_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) 136static int k2_sata_scr_write(struct ata_link *link,
137 unsigned int sc_reg, u32 val)
136{ 138{
137 if (sc_reg > SCR_CONTROL) 139 if (sc_reg > SCR_CONTROL)
138 return -EINVAL; 140 return -EINVAL;
139 writel(val, ap->ioaddr.scr_addr + (sc_reg * 4)); 141 writel(val, link->ap->ioaddr.scr_addr + (sc_reg * 4));
140 return 0; 142 return 0;
141} 143}
142 144
diff --git a/drivers/ata/sata_uli.c b/drivers/ata/sata_uli.c
index db529b849948..019575bb3e08 100644
--- a/drivers/ata/sata_uli.c
+++ b/drivers/ata/sata_uli.c
@@ -57,8 +57,8 @@ struct uli_priv {
57}; 57};
58 58
59static int uli_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); 59static int uli_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
60static int uli_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val); 60static int uli_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
61static int uli_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val); 61static int uli_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
62 62
63static const struct pci_device_id uli_pci_tbl[] = { 63static const struct pci_device_id uli_pci_tbl[] = {
64 { PCI_VDEVICE(AL, 0x5289), uli_5289 }, 64 { PCI_VDEVICE(AL, 0x5289), uli_5289 },
@@ -107,39 +107,39 @@ static unsigned int get_scr_cfg_addr(struct ata_port *ap, unsigned int sc_reg)
107 return hpriv->scr_cfg_addr[ap->port_no] + (4 * sc_reg); 107 return hpriv->scr_cfg_addr[ap->port_no] + (4 * sc_reg);
108} 108}
109 109
110static u32 uli_scr_cfg_read(struct ata_port *ap, unsigned int sc_reg) 110static u32 uli_scr_cfg_read(struct ata_link *link, unsigned int sc_reg)
111{ 111{
112 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 112 struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
113 unsigned int cfg_addr = get_scr_cfg_addr(ap, sc_reg); 113 unsigned int cfg_addr = get_scr_cfg_addr(link->ap, sc_reg);
114 u32 val; 114 u32 val;
115 115
116 pci_read_config_dword(pdev, cfg_addr, &val); 116 pci_read_config_dword(pdev, cfg_addr, &val);
117 return val; 117 return val;
118} 118}
119 119
120static void uli_scr_cfg_write(struct ata_port *ap, unsigned int scr, u32 val) 120static void uli_scr_cfg_write(struct ata_link *link, unsigned int scr, u32 val)
121{ 121{
122 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 122 struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
123 unsigned int cfg_addr = get_scr_cfg_addr(ap, scr); 123 unsigned int cfg_addr = get_scr_cfg_addr(link->ap, scr);
124 124
125 pci_write_config_dword(pdev, cfg_addr, val); 125 pci_write_config_dword(pdev, cfg_addr, val);
126} 126}
127 127
128static int uli_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) 128static int uli_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
129{ 129{
130 if (sc_reg > SCR_CONTROL) 130 if (sc_reg > SCR_CONTROL)
131 return -EINVAL; 131 return -EINVAL;
132 132
133 *val = uli_scr_cfg_read(ap, sc_reg); 133 *val = uli_scr_cfg_read(link, sc_reg);
134 return 0; 134 return 0;
135} 135}
136 136
137static int uli_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) 137static int uli_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
138{ 138{
139 if (sc_reg > SCR_CONTROL) //SCR_CONTROL=2, SCR_ERROR=1, SCR_STATUS=0 139 if (sc_reg > SCR_CONTROL) //SCR_CONTROL=2, SCR_ERROR=1, SCR_STATUS=0
140 return -EINVAL; 140 return -EINVAL;
141 141
142 uli_scr_cfg_write(ap, sc_reg, val); 142 uli_scr_cfg_write(link, sc_reg, val);
143 return 0; 143 return 0;
144} 144}
145 145
diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index 96deeb354e16..1cfa74535d91 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -68,8 +68,8 @@ enum {
68}; 68};
69 69
70static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); 70static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
71static int svia_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val); 71static int svia_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
72static int svia_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val); 72static int svia_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
73static void svia_noop_freeze(struct ata_port *ap); 73static void svia_noop_freeze(struct ata_port *ap);
74static int vt6420_prereset(struct ata_link *link, unsigned long deadline); 74static int vt6420_prereset(struct ata_link *link, unsigned long deadline);
75static int vt6421_pata_cable_detect(struct ata_port *ap); 75static int vt6421_pata_cable_detect(struct ata_port *ap);
@@ -152,19 +152,19 @@ MODULE_LICENSE("GPL");
152MODULE_DEVICE_TABLE(pci, svia_pci_tbl); 152MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
153MODULE_VERSION(DRV_VERSION); 153MODULE_VERSION(DRV_VERSION);
154 154
155static int svia_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) 155static int svia_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
156{ 156{
157 if (sc_reg > SCR_CONTROL) 157 if (sc_reg > SCR_CONTROL)
158 return -EINVAL; 158 return -EINVAL;
159 *val = ioread32(ap->ioaddr.scr_addr + (4 * sc_reg)); 159 *val = ioread32(link->ap->ioaddr.scr_addr + (4 * sc_reg));
160 return 0; 160 return 0;
161} 161}
162 162
163static int svia_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) 163static int svia_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
164{ 164{
165 if (sc_reg > SCR_CONTROL) 165 if (sc_reg > SCR_CONTROL)
166 return -EINVAL; 166 return -EINVAL;
167 iowrite32(val, ap->ioaddr.scr_addr + (4 * sc_reg)); 167 iowrite32(val, link->ap->ioaddr.scr_addr + (4 * sc_reg));
168 return 0; 168 return 0;
169} 169}
170 170
@@ -210,20 +210,20 @@ static int vt6420_prereset(struct ata_link *link, unsigned long deadline)
210 goto skip_scr; 210 goto skip_scr;
211 211
212 /* Resume phy. This is the old SATA resume sequence */ 212 /* Resume phy. This is the old SATA resume sequence */
213 svia_scr_write(ap, SCR_CONTROL, 0x300); 213 svia_scr_write(link, SCR_CONTROL, 0x300);
214 svia_scr_read(ap, SCR_CONTROL, &scontrol); /* flush */ 214 svia_scr_read(link, SCR_CONTROL, &scontrol); /* flush */
215 215
216 /* wait for phy to become ready, if necessary */ 216 /* wait for phy to become ready, if necessary */
217 do { 217 do {
218 msleep(200); 218 msleep(200);
219 svia_scr_read(ap, SCR_STATUS, &sstatus); 219 svia_scr_read(link, SCR_STATUS, &sstatus);
220 if ((sstatus & 0xf) != 1) 220 if ((sstatus & 0xf) != 1)
221 break; 221 break;
222 } while (time_before(jiffies, timeout)); 222 } while (time_before(jiffies, timeout));
223 223
224 /* open code sata_print_link_status() */ 224 /* open code sata_print_link_status() */
225 svia_scr_read(ap, SCR_STATUS, &sstatus); 225 svia_scr_read(link, SCR_STATUS, &sstatus);
226 svia_scr_read(ap, SCR_CONTROL, &scontrol); 226 svia_scr_read(link, SCR_CONTROL, &scontrol);
227 227
228 online = (sstatus & 0xf) == 0x3; 228 online = (sstatus & 0xf) == 0x3;
229 229
@@ -232,7 +232,7 @@ static int vt6420_prereset(struct ata_link *link, unsigned long deadline)
232 online ? "up" : "down", sstatus, scontrol); 232 online ? "up" : "down", sstatus, scontrol);
233 233
234 /* SStatus is read one more time */ 234 /* SStatus is read one more time */
235 svia_scr_read(ap, SCR_STATUS, &sstatus); 235 svia_scr_read(link, SCR_STATUS, &sstatus);
236 236
237 if (!online) { 237 if (!online) {
238 /* tell EH to bail */ 238 /* tell EH to bail */
diff --git a/drivers/ata/sata_vsc.c b/drivers/ata/sata_vsc.c
index f3d635c0a2e9..c57cdff9e6bd 100644
--- a/drivers/ata/sata_vsc.c
+++ b/drivers/ata/sata_vsc.c
@@ -98,20 +98,22 @@ enum {
98 VSC_SATA_INT_PHY_CHANGE), 98 VSC_SATA_INT_PHY_CHANGE),
99}; 99};
100 100
101static int vsc_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) 101static int vsc_sata_scr_read(struct ata_link *link,
102 unsigned int sc_reg, u32 *val)
102{ 103{
103 if (sc_reg > SCR_CONTROL) 104 if (sc_reg > SCR_CONTROL)
104 return -EINVAL; 105 return -EINVAL;
105 *val = readl(ap->ioaddr.scr_addr + (sc_reg * 4)); 106 *val = readl(link->ap->ioaddr.scr_addr + (sc_reg * 4));
106 return 0; 107 return 0;
107} 108}
108 109
109 110
110static int vsc_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) 111static int vsc_sata_scr_write(struct ata_link *link,
112 unsigned int sc_reg, u32 val)
111{ 113{
112 if (sc_reg > SCR_CONTROL) 114 if (sc_reg > SCR_CONTROL)
113 return -EINVAL; 115 return -EINVAL;
114 writel(val, ap->ioaddr.scr_addr + (sc_reg * 4)); 116 writel(val, link->ap->ioaddr.scr_addr + (sc_reg * 4));
115 return 0; 117 return 0;
116} 118}
117 119
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index 48ee8c7f5bdd..e1872989710a 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -294,10 +294,10 @@ static void sas_ata_post_internal(struct ata_queued_cmd *qc)
294 } 294 }
295} 295}
296 296
297static int sas_ata_scr_write(struct ata_port *ap, unsigned int sc_reg_in, 297static int sas_ata_scr_write(struct ata_link *link, unsigned int sc_reg_in,
298 u32 val) 298 u32 val)
299{ 299{
300 struct domain_device *dev = ap->private_data; 300 struct domain_device *dev = link->ap->private_data;
301 301
302 SAS_DPRINTK("STUB %s\n", __func__); 302 SAS_DPRINTK("STUB %s\n", __func__);
303 switch (sc_reg_in) { 303 switch (sc_reg_in) {
@@ -319,10 +319,10 @@ static int sas_ata_scr_write(struct ata_port *ap, unsigned int sc_reg_in,
319 return 0; 319 return 0;
320} 320}
321 321
322static int sas_ata_scr_read(struct ata_port *ap, unsigned int sc_reg_in, 322static int sas_ata_scr_read(struct ata_link *link, unsigned int sc_reg_in,
323 u32 *val) 323 u32 *val)
324{ 324{
325 struct domain_device *dev = ap->private_data; 325 struct domain_device *dev = link->ap->private_data;
326 326
327 SAS_DPRINTK("STUB %s\n", __func__); 327 SAS_DPRINTK("STUB %s\n", __func__);
328 switch (sc_reg_in) { 328 switch (sc_reg_in) {
diff --git a/include/linux/ata.h b/include/linux/ata.h
index 8a12d718c169..a26ebd25bac1 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -667,6 +667,15 @@ static inline int ata_id_has_dword_io(const u16 *id)
667 return 0; 667 return 0;
668} 668}
669 669
670static inline int ata_id_has_unload(const u16 *id)
671{
672 if (ata_id_major_version(id) >= 7 &&
673 (id[ATA_ID_CFSSE] & 0xC000) == 0x4000 &&
674 id[ATA_ID_CFSSE] & (1 << 13))
675 return 1;
676 return 0;
677}
678
670static inline int ata_id_current_chs_valid(const u16 *id) 679static inline int ata_id_current_chs_valid(const u16 *id)
671{ 680{
672 /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command 681 /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 225bfc5bd9ec..947cf84e555d 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -146,6 +146,7 @@ enum {
146 ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */ 146 ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
147 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */ 147 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
148 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */ 148 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
149 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
149 ATA_DFLAG_INIT_MASK = (1 << 24) - 1, 150 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
150 151
151 ATA_DFLAG_DETACH = (1 << 24), 152 ATA_DFLAG_DETACH = (1 << 24),
@@ -244,6 +245,7 @@ enum {
244 ATA_TMOUT_BOOT = 30000, /* heuristic */ 245 ATA_TMOUT_BOOT = 30000, /* heuristic */
245 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */ 246 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
246 ATA_TMOUT_INTERNAL_QUICK = 5000, 247 ATA_TMOUT_INTERNAL_QUICK = 5000,
248 ATA_TMOUT_MAX_PARK = 30000,
247 249
248 /* FIXME: GoVault needs 2s but we can't afford that without 250 /* FIXME: GoVault needs 2s but we can't afford that without
249 * parallel probing. 800ms is enough for iVDR disk 251 * parallel probing. 800ms is enough for iVDR disk
@@ -319,8 +321,11 @@ enum {
319 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 321 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
320 ATA_EH_ENABLE_LINK = (1 << 3), 322 ATA_EH_ENABLE_LINK = (1 << 3),
321 ATA_EH_LPM = (1 << 4), /* link power management action */ 323 ATA_EH_LPM = (1 << 4), /* link power management action */
324 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
322 325
323 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE, 326 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
327 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
328 ATA_EH_ENABLE_LINK | ATA_EH_LPM,
324 329
325 /* ata_eh_info->flags */ 330 /* ata_eh_info->flags */
326 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 331 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
@@ -452,6 +457,7 @@ enum link_pm {
452 MEDIUM_POWER, 457 MEDIUM_POWER,
453}; 458};
454extern struct device_attribute dev_attr_link_power_management_policy; 459extern struct device_attribute dev_attr_link_power_management_policy;
460extern struct device_attribute dev_attr_unload_heads;
455extern struct device_attribute dev_attr_em_message_type; 461extern struct device_attribute dev_attr_em_message_type;
456extern struct device_attribute dev_attr_em_message; 462extern struct device_attribute dev_attr_em_message;
457extern struct device_attribute dev_attr_sw_activity; 463extern struct device_attribute dev_attr_sw_activity;
@@ -554,8 +560,8 @@ struct ata_ering {
554struct ata_device { 560struct ata_device {
555 struct ata_link *link; 561 struct ata_link *link;
556 unsigned int devno; /* 0 or 1 */ 562 unsigned int devno; /* 0 or 1 */
557 unsigned long flags; /* ATA_DFLAG_xxx */
558 unsigned int horkage; /* List of broken features */ 563 unsigned int horkage; /* List of broken features */
564 unsigned long flags; /* ATA_DFLAG_xxx */
559 struct scsi_device *sdev; /* attached SCSI device */ 565 struct scsi_device *sdev; /* attached SCSI device */
560#ifdef CONFIG_ATA_ACPI 566#ifdef CONFIG_ATA_ACPI
561 acpi_handle acpi_handle; 567 acpi_handle acpi_handle;
@@ -564,6 +570,7 @@ struct ata_device {
564 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ 570 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
565 u64 n_sectors; /* size of device, if ATA */ 571 u64 n_sectors; /* size of device, if ATA */
566 unsigned int class; /* ATA_DEV_xxx */ 572 unsigned int class; /* ATA_DEV_xxx */
573 unsigned long unpark_deadline;
567 574
568 u8 pio_mode; 575 u8 pio_mode;
569 u8 dma_mode; 576 u8 dma_mode;
@@ -621,6 +628,7 @@ struct ata_eh_context {
621 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; 628 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
622 unsigned int classes[ATA_MAX_DEVICES]; 629 unsigned int classes[ATA_MAX_DEVICES];
623 unsigned int did_probe_mask; 630 unsigned int did_probe_mask;
631 unsigned int unloaded_mask;
624 unsigned int saved_ncq_enabled; 632 unsigned int saved_ncq_enabled;
625 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 633 u8 saved_xfer_mode[ATA_MAX_DEVICES];
626 /* timestamp for the last reset attempt or success */ 634 /* timestamp for the last reset attempt or success */
@@ -688,7 +696,8 @@ struct ata_port {
688 unsigned int qc_active; 696 unsigned int qc_active;
689 int nr_active_links; /* #links with active qcs */ 697 int nr_active_links; /* #links with active qcs */
690 698
691 struct ata_link link; /* host default link */ 699 struct ata_link link; /* host default link */
700 struct ata_link *slave_link; /* see ata_slave_link_init() */
692 701
693 int nr_pmp_links; /* nr of available PMP links */ 702 int nr_pmp_links; /* nr of available PMP links */
694 struct ata_link *pmp_link; /* array of PMP links */ 703 struct ata_link *pmp_link; /* array of PMP links */
@@ -709,6 +718,7 @@ struct ata_port {
709 struct list_head eh_done_q; 718 struct list_head eh_done_q;
710 wait_queue_head_t eh_wait_q; 719 wait_queue_head_t eh_wait_q;
711 int eh_tries; 720 int eh_tries;
721 struct completion park_req_pending;
712 722
713 pm_message_t pm_mesg; 723 pm_message_t pm_mesg;
714 int *pm_result; 724 int *pm_result;
@@ -772,8 +782,8 @@ struct ata_port_operations {
772 /* 782 /*
773 * Optional features 783 * Optional features
774 */ 784 */
775 int (*scr_read)(struct ata_port *ap, unsigned int sc_reg, u32 *val); 785 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
776 int (*scr_write)(struct ata_port *ap, unsigned int sc_reg, u32 val); 786 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
777 void (*pmp_attach)(struct ata_port *ap); 787 void (*pmp_attach)(struct ata_port *ap);
778 void (*pmp_detach)(struct ata_port *ap); 788 void (*pmp_detach)(struct ata_port *ap);
779 int (*enable_pm)(struct ata_port *ap, enum link_pm policy); 789 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
@@ -895,6 +905,7 @@ extern void ata_port_disable(struct ata_port *);
895extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 905extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
896extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 906extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
897 const struct ata_port_info * const * ppi, int n_ports); 907 const struct ata_port_info * const * ppi, int n_ports);
908extern int ata_slave_link_init(struct ata_port *ap);
898extern int ata_host_start(struct ata_host *host); 909extern int ata_host_start(struct ata_host *host);
899extern int ata_host_register(struct ata_host *host, 910extern int ata_host_register(struct ata_host *host,
900 struct scsi_host_template *sht); 911 struct scsi_host_template *sht);
@@ -920,8 +931,8 @@ extern int sata_scr_valid(struct ata_link *link);
920extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 931extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
921extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 932extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
922extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 933extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
923extern int ata_link_online(struct ata_link *link); 934extern bool ata_link_online(struct ata_link *link);
924extern int ata_link_offline(struct ata_link *link); 935extern bool ata_link_offline(struct ata_link *link);
925#ifdef CONFIG_PM 936#ifdef CONFIG_PM
926extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 937extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
927extern void ata_host_resume(struct ata_host *host); 938extern void ata_host_resume(struct ata_host *host);
@@ -1098,6 +1109,7 @@ extern void ata_std_error_handler(struct ata_port *ap);
1098 */ 1109 */
1099extern const struct ata_port_operations ata_base_port_ops; 1110extern const struct ata_port_operations ata_base_port_ops;
1100extern const struct ata_port_operations sata_port_ops; 1111extern const struct ata_port_operations sata_port_ops;
1112extern struct device_attribute *ata_common_sdev_attrs[];
1101 1113
1102#define ATA_BASE_SHT(drv_name) \ 1114#define ATA_BASE_SHT(drv_name) \
1103 .module = THIS_MODULE, \ 1115 .module = THIS_MODULE, \
@@ -1112,7 +1124,8 @@ extern const struct ata_port_operations sata_port_ops;
1112 .proc_name = drv_name, \ 1124 .proc_name = drv_name, \
1113 .slave_configure = ata_scsi_slave_config, \ 1125 .slave_configure = ata_scsi_slave_config, \
1114 .slave_destroy = ata_scsi_slave_destroy, \ 1126 .slave_destroy = ata_scsi_slave_destroy, \
1115 .bios_param = ata_std_bios_param 1127 .bios_param = ata_std_bios_param, \
1128 .sdev_attrs = ata_common_sdev_attrs
1116 1129
1117#define ATA_NCQ_SHT(drv_name) \ 1130#define ATA_NCQ_SHT(drv_name) \
1118 ATA_BASE_SHT(drv_name), \ 1131 ATA_BASE_SHT(drv_name), \
@@ -1134,7 +1147,7 @@ static inline bool sata_pmp_attached(struct ata_port *ap)
1134 1147
1135static inline int ata_is_host_link(const struct ata_link *link) 1148static inline int ata_is_host_link(const struct ata_link *link)
1136{ 1149{
1137 return link == &link->ap->link; 1150 return link == &link->ap->link || link == link->ap->slave_link;
1138} 1151}
1139#else /* CONFIG_SATA_PMP */ 1152#else /* CONFIG_SATA_PMP */
1140static inline bool sata_pmp_supported(struct ata_port *ap) 1153static inline bool sata_pmp_supported(struct ata_port *ap)
@@ -1167,7 +1180,7 @@ static inline int sata_srst_pmp(struct ata_link *link)
1167 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args) 1180 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1168 1181
1169#define ata_link_printk(link, lv, fmt, args...) do { \ 1182#define ata_link_printk(link, lv, fmt, args...) do { \
1170 if (sata_pmp_attached((link)->ap)) \ 1183 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
1171 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \ 1184 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1172 (link)->pmp , ##args); \ 1185 (link)->pmp , ##args); \
1173 else \ 1186 else \
@@ -1265,34 +1278,17 @@ static inline int ata_link_active(struct ata_link *link)
1265 return ata_tag_valid(link->active_tag) || link->sactive; 1278 return ata_tag_valid(link->active_tag) || link->sactive;
1266} 1279}
1267 1280
1268static inline struct ata_link *ata_port_first_link(struct ata_port *ap) 1281extern struct ata_link *__ata_port_next_link(struct ata_port *ap,
1269{ 1282 struct ata_link *link,
1270 if (sata_pmp_attached(ap)) 1283 bool dev_only);
1271 return ap->pmp_link;
1272 return &ap->link;
1273}
1274
1275static inline struct ata_link *ata_port_next_link(struct ata_link *link)
1276{
1277 struct ata_port *ap = link->ap;
1278
1279 if (ata_is_host_link(link)) {
1280 if (!sata_pmp_attached(ap))
1281 return NULL;
1282 return ap->pmp_link;
1283 }
1284
1285 if (++link < ap->nr_pmp_links + ap->pmp_link)
1286 return link;
1287 return NULL;
1288}
1289 1284
1290#define __ata_port_for_each_link(lk, ap) \ 1285#define __ata_port_for_each_link(link, ap) \
1291 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk)) 1286 for ((link) = __ata_port_next_link((ap), NULL, false); (link); \
1287 (link) = __ata_port_next_link((ap), (link), false))
1292 1288
1293#define ata_port_for_each_link(link, ap) \ 1289#define ata_port_for_each_link(link, ap) \
1294 for ((link) = ata_port_first_link(ap); (link); \ 1290 for ((link) = __ata_port_next_link((ap), NULL, true); (link); \
1295 (link) = ata_port_next_link(link)) 1291 (link) = __ata_port_next_link((ap), (link), true))
1296 1292
1297#define ata_link_for_each_dev(dev, link) \ 1293#define ata_link_for_each_dev(dev, link) \
1298 for ((dev) = (link)->device; \ 1294 for ((dev) = (link)->device; \
generated by cgit v1.2.2 (git 2.25.0) at 2025-10-31 10:00:20 -0400