1 files changed, 66 insertions, 21 deletions

diff --git a/include/linux/libata.h b/include/linux/libata.h
index f4284bf89758..66c3100c2b94 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -131,6 +131,7 @@ enum {
         ATA_DFLAG_CFG_MASK      = (1 << 8) - 1,
 
         ATA_DFLAG_PIO           = (1 << 8), /* device currently in PIO mode */
+        ATA_DFLAG_SUSPENDED     = (1 << 9), /* device suspended */
         ATA_DFLAG_INIT_MASK     = (1 << 16) - 1,
 
         ATA_DFLAG_DETACH        = (1 << 16),
@@ -160,22 +161,28 @@ enum {
         ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
         ATA_FLAG_SKIP_D2H_BSY   = (1 << 12), /* can't wait for the first D2H
                                               * Register FIS clearing BSY */
-
         ATA_FLAG_DEBUGMSG       = (1 << 13),
-        ATA_FLAG_FLUSH_PORT_TASK = (1 << 14), /* flush port task */
 
-        ATA_FLAG_EH_PENDING     = (1 << 15), /* EH pending */
-        ATA_FLAG_EH_IN_PROGRESS = (1 << 16), /* EH in progress */
-        ATA_FLAG_FROZEN         = (1 << 17), /* port is frozen */
-        ATA_FLAG_RECOVERED      = (1 << 18), /* recovery action performed */
-        ATA_FLAG_LOADING        = (1 << 19), /* boot/loading probe */
-        ATA_FLAG_UNLOADING      = (1 << 20), /* module is unloading */
-        ATA_FLAG_SCSI_HOTPLUG   = (1 << 21), /* SCSI hotplug scheduled */
+        /* The following flag belongs to ap->pflags but is kept in
+         * ap->flags because it's referenced in many LLDs and will be
+         * removed in not-too-distant future.
+         */
+        ATA_FLAG_DISABLED       = (1 << 23), /* port is disabled, ignore it */
+
+        /* bits 24:31 of ap->flags are reserved for LLD specific flags */
 
-        ATA_FLAG_DISABLED       = (1 << 22), /* port is disabled, ignore it */
-        ATA_FLAG_SUSPENDED      = (1 << 23), /* port is suspended (power) */
+        /* struct ata_port pflags */
+        ATA_PFLAG_EH_PENDING    = (1 << 0), /* EH pending */
+        ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
+        ATA_PFLAG_FROZEN        = (1 << 2), /* port is frozen */
+        ATA_PFLAG_RECOVERED     = (1 << 3), /* recovery action performed */
+        ATA_PFLAG_LOADING       = (1 << 4), /* boot/loading probe */
+        ATA_PFLAG_UNLOADING     = (1 << 5), /* module is unloading */
+        ATA_PFLAG_SCSI_HOTPLUG  = (1 << 6), /* SCSI hotplug scheduled */
 
-        /* bits 24:31 of ap->flags are reserved for LLDD specific flags */
+        ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */
+        ATA_PFLAG_SUSPENDED     = (1 << 17), /* port is suspended (power) */
+        ATA_PFLAG_PM_PENDING    = (1 << 18), /* PM operation pending */
 
         /* struct ata_queued_cmd flags */
         ATA_QCFLAG_ACTIVE       = (1 << 0), /* cmd not yet ack'd to scsi lyer */
@@ -248,15 +255,24 @@ enum {
         ATA_EH_REVALIDATE       = (1 << 0),
         ATA_EH_SOFTRESET        = (1 << 1),
         ATA_EH_HARDRESET        = (1 << 2),
+        ATA_EH_SUSPEND          = (1 << 3),
+        ATA_EH_RESUME           = (1 << 4),
+        ATA_EH_PM_FREEZE        = (1 << 5),
 
         ATA_EH_RESET_MASK       = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
-        ATA_EH_PERDEV_MASK      = ATA_EH_REVALIDATE,
+        ATA_EH_PERDEV_MASK      = ATA_EH_REVALIDATE | ATA_EH_SUSPEND |
+                                  ATA_EH_RESUME | ATA_EH_PM_FREEZE,
 
         /* ata_eh_info->flags */
         ATA_EHI_HOTPLUGGED      = (1 << 0),  /* could have been hotplugged */
+        ATA_EHI_RESUME_LINK     = (1 << 1),  /* resume link (reset modifier) */
+        ATA_EHI_NO_AUTOPSY      = (1 << 2),  /* no autopsy */
+        ATA_EHI_QUIET           = (1 << 3),  /* be quiet */
 
         ATA_EHI_DID_RESET       = (1 << 16), /* already reset this port */
 
+        ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
+
         /* max repeat if error condition is still set after ->error_handler */
         ATA_EH_MAX_REPEAT       = 5,
 
@@ -486,6 +502,7 @@ struct ata_port {
         const struct ata_port_operations *ops;
         spinlock_t              *lock;
         unsigned long           flags;  /* ATA_FLAG_xxx */
+        unsigned int            pflags; /* ATA_PFLAG_xxx */
         unsigned int            id;     /* unique id req'd by scsi midlyr */
         unsigned int            port_no; /* unique port #; from zero */
         unsigned int            hard_port_no;   /* hardware port #; from zero */
@@ -535,6 +552,9 @@ struct ata_port {
         struct list_head        eh_done_q;
         wait_queue_head_t       eh_wait_q;
 
+        pm_message_t            pm_mesg;
+        int                     *pm_result;
+
         void                    *private_data;
 
         u8                      sector_buf[ATA_SECT_SIZE]; /* owned by EH */
@@ -589,6 +609,9 @@ struct ata_port_operations {
         void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
                            u32 val);
 
+        int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
+        int (*port_resume) (struct ata_port *ap);
+
         int (*port_start) (struct ata_port *ap);
         void (*port_stop) (struct ata_port *ap);
 
@@ -622,9 +645,18 @@ struct ata_timing {
 
 #define FIT(v,vmin,vmax)        max_t(short,min_t(short,v,vmax),vmin)
 
-extern const unsigned long sata_deb_timing_boot[];
-extern const unsigned long sata_deb_timing_eh[];
-extern const unsigned long sata_deb_timing_before_fsrst[];
+extern const unsigned long sata_deb_timing_normal[];
+extern const unsigned long sata_deb_timing_hotplug[];
+extern const unsigned long sata_deb_timing_long[];
+
+static inline const unsigned long *
+sata_ehc_deb_timing(struct ata_eh_context *ehc)
+{
+        if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
+                return sata_deb_timing_hotplug;
+        else
+                return sata_deb_timing_normal;
+}
 
 extern void ata_port_probe(struct ata_port *);
 extern void __sata_phy_reset(struct ata_port *ap);
@@ -644,6 +676,8 @@ extern void ata_std_ports(struct ata_ioports *ioaddr);
 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
                              unsigned int n_ports);
 extern void ata_pci_remove_one (struct pci_dev *pdev);
+extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t state);
+extern void ata_pci_device_do_resume(struct pci_dev *pdev);
 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state);
 extern int ata_pci_device_resume(struct pci_dev *pdev);
 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
@@ -664,8 +698,9 @@ extern int ata_port_online(struct ata_port *ap);
 extern int ata_port_offline(struct ata_port *ap);
 extern int ata_scsi_device_resume(struct scsi_device *);
 extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t state);
-extern int ata_device_resume(struct ata_device *);
-extern int ata_device_suspend(struct ata_device *, pm_message_t state);
+extern int ata_host_set_suspend(struct ata_host_set *host_set,
+                                pm_message_t mesg);
+extern void ata_host_set_resume(struct ata_host_set *host_set);
 extern int ata_ratelimit(void);
 extern unsigned int ata_busy_sleep(struct ata_port *ap,
                                    unsigned long timeout_pat,
@@ -825,19 +860,24 @@ extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
         (ehi)->desc_len = 0; \
 } while (0)
 
-static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
+static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
 {
         if (ehi->flags & ATA_EHI_HOTPLUGGED)
                 return;
 
-        ehi->flags |= ATA_EHI_HOTPLUGGED;
+        ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK;
         ehi->hotplug_timestamp = jiffies;
 
-        ehi->err_mask |= AC_ERR_ATA_BUS;
         ehi->action |= ATA_EH_SOFTRESET;
         ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
 }
 
+static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
+{
+        __ata_ehi_hotplugged(ehi);
+        ehi->err_mask |= AC_ERR_ATA_BUS;
+}
+
 /*
  * qc helpers
  */
@@ -921,6 +961,11 @@ static inline unsigned int ata_dev_absent(const struct ata_device *dev)
         return ata_class_absent(dev->class);
 }
 
+static inline unsigned int ata_dev_ready(const struct ata_device *dev)
+{
+        return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED);
+}
+
 /*
  * port helpers
  */