Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 122 insertions, 87 deletions

diff --git a/include/linux/ata.h b/include/linux/ata.h
index fe6e681a9d74..32df2b6ef0e0 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -89,6 +89,8 @@ enum {
         ATA_ID_SPG              = 98,
         ATA_ID_LBA_CAPACITY_2   = 100,
         ATA_ID_SECTOR_SIZE      = 106,
+        ATA_ID_WWN              = 108,
+        ATA_ID_LOGICAL_SECTOR_SIZE      = 117,  /* and 118 */
         ATA_ID_LAST_LUN         = 126,
         ATA_ID_DLF              = 128,
         ATA_ID_CSFO             = 129,
@@ -102,6 +104,7 @@ enum {
         ATA_ID_SERNO_LEN        = 20,
         ATA_ID_FW_REV_LEN       = 8,
         ATA_ID_PROD_LEN         = 40,
+        ATA_ID_WWN_LEN          = 8,
 
         ATA_PCI_CTL_OFS         = 2,
 
@@ -597,42 +600,42 @@ static inline bool ata_id_has_dipm(const u16 *id)
 }
 
 
-static inline int ata_id_has_fua(const u16 *id)
+static inline bool ata_id_has_fua(const u16 *id)
 {
         if ((id[ATA_ID_CFSSE] & 0xC000) != 0x4000)
-                return 0;
+                return false;
         return id[ATA_ID_CFSSE] & (1 << 6);
 }
 
-static inline int ata_id_has_flush(const u16 *id)
+static inline bool ata_id_has_flush(const u16 *id)
 {
         if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
-                return 0;
+                return false;
         return id[ATA_ID_COMMAND_SET_2] & (1 << 12);
 }
 
-static inline int ata_id_flush_enabled(const u16 *id)
+static inline bool ata_id_flush_enabled(const u16 *id)
 {
         if (ata_id_has_flush(id) == 0)
-                return 0;
+                return false;
         if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
-                return 0;
+                return false;
         return id[ATA_ID_CFS_ENABLE_2] & (1 << 12);
 }
 
-static inline int ata_id_has_flush_ext(const u16 *id)
+static inline bool ata_id_has_flush_ext(const u16 *id)
 {
         if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
-                return 0;
+                return false;
         return id[ATA_ID_COMMAND_SET_2] & (1 << 13);
 }
 
-static inline int ata_id_flush_ext_enabled(const u16 *id)
+static inline bool ata_id_flush_ext_enabled(const u16 *id)
 {
         if (ata_id_has_flush_ext(id) == 0)
-                return 0;
+                return false;
         if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
-                return 0;
+                return false;
         /*
          * some Maxtor disks have bit 13 defined incorrectly
          * so check bit 10 too
@@ -640,76 +643,109 @@ static inline int ata_id_flush_ext_enabled(const u16 *id)
         return (id[ATA_ID_CFS_ENABLE_2] & 0x2400) == 0x2400;
 }
 
-static inline int ata_id_has_large_logical_sectors(const u16 *id)
+static inline u32 ata_id_logical_sector_size(const u16 *id)
 {
-        if ((id[ATA_ID_SECTOR_SIZE] & 0xc000) != 0x4000)
-                return 0;
-        return id[ATA_ID_SECTOR_SIZE] & (1 << 13);
+        /* T13/1699-D Revision 6a, Sep 6, 2008. Page 128.
+         * IDENTIFY DEVICE data, word 117-118.
+         * 0xd000 ignores bit 13 (logical:physical > 1)
+         */
+        if ((id[ATA_ID_SECTOR_SIZE] & 0xd000) == 0x5000)
+                return (((id[ATA_ID_LOGICAL_SECTOR_SIZE+1] << 16)
+                         + id[ATA_ID_LOGICAL_SECTOR_SIZE]) * sizeof(u16)) ;
+        return ATA_SECT_SIZE;
 }
 
-static inline u16 ata_id_logical_per_physical_sectors(const u16 *id)
+static inline u8 ata_id_log2_per_physical_sector(const u16 *id)
 {
-        return 1 << (id[ATA_ID_SECTOR_SIZE] & 0xf);
+        /* T13/1699-D Revision 6a, Sep 6, 2008. Page 128.
+         * IDENTIFY DEVICE data, word 106.
+         * 0xe000 ignores bit 12 (logical sector > 512 bytes)
+         */
+        if ((id[ATA_ID_SECTOR_SIZE] & 0xe000) == 0x6000)
+                return (id[ATA_ID_SECTOR_SIZE] & 0xf);
+        return 0;
+}
+
+/* Offset of logical sectors relative to physical sectors.
+ *
+ * If device has more than one logical sector per physical sector
+ * (aka 512 byte emulation), vendors might offset the "sector 0" address
+ * so sector 63 is "naturally aligned" - e.g. FAT partition table.
+ * This avoids Read/Mod/Write penalties when using FAT partition table
+ * and updating "well aligned" (FS perspective) physical sectors on every
+ * transaction.
+ */
+static inline u16 ata_id_logical_sector_offset(const u16 *id,
+         u8 log2_per_phys)
+{
+        u16 word_209 = id[209];
+
+        if ((log2_per_phys > 1) && (word_209 & 0xc000) == 0x4000) {
+                u16 first = word_209 & 0x3fff;
+                if (first > 0)
+                        return (1 << log2_per_phys) - first;
+        }
+        return 0;
 }
 
-static inline int ata_id_has_lba48(const u16 *id)
+static inline bool ata_id_has_lba48(const u16 *id)
 {
         if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
-                return 0;
+                return false;
         if (!ata_id_u64(id, ATA_ID_LBA_CAPACITY_2))
-                return 0;
+                return false;
         return id[ATA_ID_COMMAND_SET_2] & (1 << 10);
 }
 
-static inline int ata_id_lba48_enabled(const u16 *id)
+static inline bool ata_id_lba48_enabled(const u16 *id)
 {
         if (ata_id_has_lba48(id) == 0)
-                return 0;
+                return false;
         if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
-                return 0;
+                return false;
         return id[ATA_ID_CFS_ENABLE_2] & (1 << 10);
 }
 
-static inline int ata_id_hpa_enabled(const u16 *id)
+static inline bool ata_id_hpa_enabled(const u16 *id)
 {
         /* Yes children, word 83 valid bits cover word 82 data */
         if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
-                return 0;
+                return false;
         /* And 87 covers 85-87 */
         if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
-                return 0;
+                return false;
         /* Check command sets enabled as well as supported */
         if ((id[ATA_ID_CFS_ENABLE_1] & (1 << 10)) == 0)
-                return 0;
+                return false;
         return id[ATA_ID_COMMAND_SET_1] & (1 << 10);
 }
 
-static inline int ata_id_has_wcache(const u16 *id)
+static inline bool ata_id_has_wcache(const u16 *id)
 {
         /* Yes children, word 83 valid bits cover word 82 data */
         if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
-                return 0;
+                return false;
         return id[ATA_ID_COMMAND_SET_1] & (1 << 5);
 }
 
-static inline int ata_id_has_pm(const u16 *id)
+static inline bool ata_id_has_pm(const u16 *id)
 {
         if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
-                return 0;
+                return false;
         return id[ATA_ID_COMMAND_SET_1] & (1 << 3);
 }
 
-static inline int ata_id_rahead_enabled(const u16 *id)
+static inline bool ata_id_rahead_enabled(const u16 *id)
 {
         if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
-                return 0;
+                return false;
         return id[ATA_ID_CFS_ENABLE_1] & (1 << 6);
 }
 
-static inline int ata_id_wcache_enabled(const u16 *id)
+static inline bool ata_id_wcache_enabled(const u16 *id)
 {
         if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
-                return 0;
+                return false;
         return id[ATA_ID_CFS_ENABLE_1] & (1 << 5);
 }
 
@@ -739,7 +775,7 @@ static inline unsigned int ata_id_major_version(const u16 *id)
         return mver;
 }
 
-static inline int ata_id_is_sata(const u16 *id)
+static inline bool ata_id_is_sata(const u16 *id)
 {
         /*
          * See if word 93 is 0 AND drive is at least ATA-5 compatible
@@ -748,37 +784,40 @@ static inline int ata_id_is_sata(const u16 *id)
          * 0x0000 and 0xffff along with the earlier ATA revisions...
          */
         if (id[ATA_ID_HW_CONFIG] == 0 && (short)id[ATA_ID_MAJOR_VER] >= 0x0020)
-                return 1;
-        return 0;
+                return true;
+        return false;
 }
 
-static inline int ata_id_has_tpm(const u16 *id)
+static inline bool ata_id_has_tpm(const u16 *id)
 {
         /* The TPM bits are only valid on ATA8 */
         if (ata_id_major_version(id) < 8)
-                return 0;
+                return false;
         if ((id[48] & 0xC000) != 0x4000)
-                return 0;
+                return false;
         return id[48] & (1 << 0);
 }
 
-static inline int ata_id_has_dword_io(const u16 *id)
+static inline bool ata_id_has_dword_io(const u16 *id)
 {
         /* ATA 8 reuses this flag for "trusted" computing */
         if (ata_id_major_version(id) > 7)
-                return 0;
-        if (id[ATA_ID_DWORD_IO] & (1 << 0))
-                return 1;
-        return 0;
+                return false;
+        return id[ATA_ID_DWORD_IO] & (1 << 0);
 }
 
-static inline int ata_id_has_unload(const u16 *id)
+static inline bool ata_id_has_unload(const u16 *id)
 {
         if (ata_id_major_version(id) >= 7 &&
             (id[ATA_ID_CFSSE] & 0xC000) == 0x4000 &&
             id[ATA_ID_CFSSE] & (1 << 13))
-                return 1;
-        return 0;
+                return true;
+        return false;
+}
+
+static inline bool ata_id_has_wwn(const u16 *id)
+{
+        return (id[ATA_ID_CSF_DEFAULT] & 0xC100) == 0x4100;
 }
 
 static inline int ata_id_form_factor(const u16 *id)
@@ -809,25 +848,25 @@ static inline int ata_id_rotation_rate(const u16 *id)
         return val;
 }
 
-static inline int ata_id_has_trim(const u16 *id)
+static inline bool ata_id_has_trim(const u16 *id)
 {
         if (ata_id_major_version(id) >= 7 &&
             (id[ATA_ID_DATA_SET_MGMT] & 1))
-                return 1;
-        return 0;
+                return true;
+        return false;
 }
 
-static inline int ata_id_has_zero_after_trim(const u16 *id)
+static inline bool ata_id_has_zero_after_trim(const u16 *id)
 {
         /* DSM supported, deterministic read, and read zero after trim set */
         if (ata_id_has_trim(id) &&
             (id[ATA_ID_ADDITIONAL_SUPP] & 0x4020) == 0x4020)
-                return 1;
+                return true;
 
-        return 0;
+        return false;
 }
 
-static inline int ata_id_current_chs_valid(const u16 *id)
+static inline bool ata_id_current_chs_valid(const u16 *id)
 {
         /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
            has not been issued to the device then the values of
@@ -839,11 +878,11 @@ static inline int ata_id_current_chs_valid(const u16 *id)
                 id[ATA_ID_CUR_SECTORS];    /* sectors in current translation */
 }
 
-static inline int ata_id_is_cfa(const u16 *id)
+static inline bool ata_id_is_cfa(const u16 *id)
 {
         if ((id[ATA_ID_CONFIG] == 0x848A) ||    /* Traditional CF */
             (id[ATA_ID_CONFIG] == 0x844A))      /* Delkin Devices CF */
-                return 1;
+                return true;
         /*
          * CF specs don't require specific value in the word 0 anymore and yet
          * they forbid to report the ATA version in the word 80 and require the
@@ -852,44 +891,40 @@ static inline int ata_id_is_cfa(const u16 *id)
          * and while those that don't indicate CFA feature support need some
          * sort of quirk list, it seems impractical for the ones that do...
          */
-        if ((id[ATA_ID_COMMAND_SET_2] & 0xC004) == 0x4004)
-                return 1;
-        return 0;
+        return (id[ATA_ID_COMMAND_SET_2] & 0xC004) == 0x4004;
 }
 
-static inline int ata_id_is_ssd(const u16 *id)
+static inline bool ata_id_is_ssd(const u16 *id)
 {
         return id[ATA_ID_ROT_SPEED] == 0x01;
 }
 
-static inline int ata_id_pio_need_iordy(const u16 *id, const u8 pio)
+static inline bool ata_id_pio_need_iordy(const u16 *id, const u8 pio)
 {
         /* CF spec. r4.1 Table 22 says no IORDY on PIO5 and PIO6. */
         if (pio > 4 && ata_id_is_cfa(id))
-                return 0;
+                return false;
         /* For PIO3 and higher it is mandatory. */
         if (pio > 2)
-                return 1;
+                return true;
         /* Turn it on when possible. */
-        if (ata_id_has_iordy(id))
-                return 1;
-        return 0;
+        return ata_id_has_iordy(id);
 }
 
-static inline int ata_drive_40wire(const u16 *dev_id)
+static inline bool ata_drive_40wire(const u16 *dev_id)
 {
         if (ata_id_is_sata(dev_id))
-                return 0;       /* SATA */
+                return false;   /* SATA */
         if ((dev_id[ATA_ID_HW_CONFIG] & 0xE000) == 0x6000)
-                return 0;       /* 80 wire */
-        return 1;
+                return false;   /* 80 wire */
+        return true;
 }
 
-static inline int ata_drive_40wire_relaxed(const u16 *dev_id)
+static inline bool ata_drive_40wire_relaxed(const u16 *dev_id)
 {
         if ((dev_id[ATA_ID_HW_CONFIG] & 0x2000) == 0x2000)
-                return 0;       /* 80 wire */
-        return 1;
+                return false;   /* 80 wire */
+        return true;
 }
 
 static inline int atapi_cdb_len(const u16 *dev_id)
@@ -902,12 +937,12 @@ static inline int atapi_cdb_len(const u16 *dev_id)
         }
 }
 
-static inline int atapi_command_packet_set(const u16 *dev_id)
+static inline bool atapi_command_packet_set(const u16 *dev_id)
 {
         return (dev_id[ATA_ID_CONFIG] >> 8) & 0x1f;
 }
 
-static inline int atapi_id_dmadir(const u16 *dev_id)
+static inline bool atapi_id_dmadir(const u16 *dev_id)
 {
         return ata_id_major_version(dev_id) >= 7 && (dev_id[62] & 0x8000);
 }
@@ -920,13 +955,13 @@ static inline int atapi_id_dmadir(const u16 *dev_id)
  *
  * It is called only once for each device.
  */
-static inline int ata_id_is_lba_capacity_ok(u16 *id)
+static inline bool ata_id_is_lba_capacity_ok(u16 *id)
 {
         unsigned long lba_sects, chs_sects, head, tail;
 
         /* No non-LBA info .. so valid! */
         if (id[ATA_ID_CYLS] == 0)
-                return 1;
+                return true;
 
         lba_sects = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
 
@@ -941,13 +976,13 @@ static inline int ata_id_is_lba_capacity_ok(u16 *id)
             id[ATA_ID_SECTORS] == 63 &&
             (id[ATA_ID_HEADS] == 15 || id[ATA_ID_HEADS] == 16) &&
             (lba_sects >= 16383 * 63 * id[ATA_ID_HEADS]))
-                return 1;
+                return true;
 
         chs_sects = id[ATA_ID_CYLS] * id[ATA_ID_HEADS] * id[ATA_ID_SECTORS];
 
         /* perform a rough sanity check on lba_sects: within 10% is OK */
         if (lba_sects - chs_sects < chs_sects/10)
-                return 1;
+                return true;
 
         /* some drives have the word order reversed */
         head = (lba_sects >> 16) & 0xffff;
@@ -956,10 +991,10 @@ static inline int ata_id_is_lba_capacity_ok(u16 *id)
 
         if (lba_sects - chs_sects < chs_sects/10) {
                 *(__le32 *)&id[ATA_ID_LBA_CAPACITY] = __cpu_to_le32(lba_sects);
-                return 1;       /* LBA capacity is (now) good */
+                return true;    /* LBA capacity is (now) good */
         }
 
-        return 0;       /* LBA capacity value may be bad */
+        return false;   /* LBA capacity value may be bad */
 }
 
 static inline void ata_id_to_hd_driveid(u16 *id)
@@ -1017,19 +1052,19 @@ static inline int is_multi_taskfile(struct ata_taskfile *tf)
                (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
 }
 
-static inline int ata_ok(u8 status)
+static inline bool ata_ok(u8 status)
 {
         return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
                         == ATA_DRDY);
 }
 
-static inline int lba_28_ok(u64 block, u32 n_block)
+static inline bool lba_28_ok(u64 block, u32 n_block)
 {
         /* check the ending block number: must be LESS THAN 0x0fffffff */
         return ((block + n_block) < ((1 << 28) - 1)) && (n_block <= 256);
 }
 
-static inline int lba_48_ok(u64 block, u32 n_block)
+static inline bool lba_48_ok(u64 block, u32 n_block)
 {
         /* check the ending block number */
         return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);