fs: limit filesystem stacking depth

[pandora-kernel.git] / include / linux / libata.h

diff --git a/include/linux/libata.h b/include/linux/libata.h
index cafc09a..10f5643 100644 (file)
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -182,6 +182,7 @@ enum {
        ATA_LFLAG_DISABLED      = (1 << 6), /* link is disabled */
        ATA_LFLAG_SW_ACTIVITY   = (1 << 7), /* keep activity stats */
        ATA_LFLAG_NO_LPM        = (1 << 8), /* disable LPM on this link */
+       ATA_LFLAG_CHANGED       = (1 << 10), /* LPM state changed on this link */
 
        /* struct ata_port flags */
        ATA_FLAG_SLAVE_POSS     = (1 << 0), /* host supports slave dev */
@@ -207,6 +208,7 @@ enum {
        ATA_FLAG_SW_ACTIVITY    = (1 << 22), /* driver supports sw activity
                                              * led */
        ATA_FLAG_NO_DIPM        = (1 << 23), /* host not happy with DIPM */
+       ATA_FLAG_LOWTAG         = (1 << 24), /* host wants lowest available tag */
 
        /* bits 24:31 of ap->flags are reserved for LLD specific flags */
 
@@ -283,6 +285,12 @@ enum {
         */
        ATA_TMOUT_PMP_SRST_WAIT = 5000,
 
+       /* When the LPM policy is set to ATA_LPM_MAX_POWER, there might
+        * be a spurious PHY event, so ignore the first PHY event that
+        * occurs within 10s after the policy change.
+        */
+       ATA_TMOUT_SPURIOUS_PHY  = 10000,
+
        /* ATA bus states */
        BUS_UNKNOWN             = 0,
        BUS_DMA                 = 1,
@@ -392,6 +400,11 @@ enum {
        ATA_HORKAGE_NOSETXFER   = (1 << 14),    /* skip SETXFER, SATA only */
        ATA_HORKAGE_BROKEN_FPDMA_AA     = (1 << 15),    /* skip AA */
        ATA_HORKAGE_DUMP_ID     = (1 << 16),    /* dump IDENTIFY data */
+       ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17),  /* Set max sects to 65535 */
+       ATA_HORKAGE_NOLPM       = (1 << 20),    /* don't use LPM */
+       ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21),  /* some WDs have broken LPM */
+       ATA_HORKAGE_NOTRIM      = (1 << 24),    /* don't use TRIM */
+
 
         /* DMA mask for user DMA control: User visible values; DO NOT
            renumber */
@@ -537,6 +550,7 @@ struct ata_host {
        struct device           *dev;
        void __iomem * const    *iomap;
        unsigned int            n_ports;
+       unsigned int            n_tags;                 /* nr of NCQ tags */
        void                    *private_data;
        struct ata_port_operations *ops;
        unsigned long           flags;
@@ -648,7 +662,7 @@ struct ata_device {
        union {
                u16             id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
                u32             gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
-       };
+       } ____cacheline_aligned;
 
        /* error history */
        int                     spdn_cnt;
@@ -723,6 +737,8 @@ struct ata_link {
        struct ata_eh_context   eh_context;
 
        struct ata_device       device[ATA_MAX_DEVICES];
+
+       unsigned long           last_lpm_change; /* when last LPM change happened */
 };
 #define ATA_LINK_CLEAR_BEGIN           offsetof(struct ata_link, active_tag)
 #define ATA_LINK_CLEAR_END             offsetof(struct ata_link, device[0])
@@ -760,6 +776,7 @@ struct ata_port {
        unsigned long           qc_allocated;
        unsigned int            qc_active;
        int                     nr_active_links; /* #links with active qcs */
+       unsigned int            last_tag;       /* track next tag hw expects */
 
        struct ata_link         link;           /* host default link */
        struct ata_link         *slave_link;    /* see ata_slave_link_init() */
@@ -1058,6 +1075,7 @@ extern struct ata_device *ata_dev_pair(struct ata_device *adev);
 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);
 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q);
+extern bool sata_lpm_ignore_phy_events(struct ata_link *link);
 
 extern int ata_cable_40wire(struct ata_port *ap);
 extern int ata_cable_80wire(struct ata_port *ap);