[BLOCK] add FUA support to libata

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>

1 files changed, 26 insertions, 6 deletions

diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
index e0439be4b573..2c644cbb6e9c 100644
--- a/drivers/scsi/libata-scsi.c
+++ b/drivers/scsi/libata-scsi.c
@@ -1080,11 +1080,13 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicm
             scsicmd[0] == WRITE_16)
                 tf->flags |= ATA_TFLAG_WRITE;
 
-        /* Calculate the SCSI LBA and transfer length. */
+        /* Calculate the SCSI LBA, transfer length and FUA. */
         switch (scsicmd[0]) {
         case READ_10:
         case WRITE_10:
                 scsi_10_lba_len(scsicmd, &block, &n_block);
+                if (unlikely(scsicmd[1] & (1 << 3)))
+                        tf->flags |= ATA_TFLAG_FUA;
                 break;
         case READ_6:
         case WRITE_6:
@@ -1099,6 +1101,8 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicm
         case READ_16:
         case WRITE_16:
                 scsi_16_lba_len(scsicmd, &block, &n_block);
+                if (unlikely(scsicmd[1] & (1 << 3)))
+                        tf->flags |= ATA_TFLAG_FUA;
                 break;
         default:
                 DPRINTK("no-byte command\n");
@@ -1142,7 +1146,8 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicm
                         tf->device |= (block >> 24) & 0xf;
                 }
 
-                ata_rwcmd_protocol(qc);
+                if (unlikely(ata_rwcmd_protocol(qc) < 0))
+                        goto invalid_fld;
 
                 qc->nsect = n_block;
                 tf->nsect = n_block & 0xff;
@@ -1160,7 +1165,8 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicm
                 if ((block >> 28) || (n_block > 256))
                         goto out_of_range;
 
-                ata_rwcmd_protocol(qc);
+                if (unlikely(ata_rwcmd_protocol(qc) < 0))
+                        goto invalid_fld;
 
                 /* Convert LBA to CHS */
                 track = (u32)block / dev->sectors;
@@ -1695,6 +1701,7 @@ static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
                                   unsigned int buflen)
 {
+        struct ata_device *dev = args->dev;
         u8 *scsicmd = args->cmd->cmnd, *p, *last;
         const u8 sat_blk_desc[] = {
                 0, 0, 0, 0,     /* number of blocks: sat unspecified */
@@ -1703,6 +1710,7 @@ unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
         };
         u8 pg, spg;
         unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
+        u8 dpofua;
 
         VPRINTK("ENTER\n");
 
@@ -1771,9 +1779,17 @@ unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
 
         if (minlen < 1)
                 return 0;
+
+        dpofua = 0;
+        if (ata_id_has_fua(args->id) && dev->flags & ATA_DFLAG_LBA48 &&
+            (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
+                dpofua = 1 << 4;
+
         if (six_byte) {
                 output_len--;
                 rbuf[0] = output_len;
+                if (minlen > 2)
+                        rbuf[2] |= dpofua;
                 if (ebd) {
                         if (minlen > 3)
                                 rbuf[3] = sizeof(sat_blk_desc);
@@ -1786,6 +1802,8 @@ unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
                 rbuf[0] = output_len >> 8;
                 if (minlen > 1)
                         rbuf[1] = output_len;
+                if (minlen > 3)
+                        rbuf[3] |= dpofua;
                 if (ebd) {
                         if (minlen > 7)
                                 rbuf[7] = sizeof(sat_blk_desc);
@@ -2446,7 +2464,7 @@ int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
                 if (xlat_func)
                         ata_scsi_translate(ap, dev, cmd, done, xlat_func);
                 else
-                        ata_scsi_simulate(dev->id, cmd, done);
+                        ata_scsi_simulate(ap, dev, cmd, done);
         } else
                 ata_scsi_translate(ap, dev, cmd, done, atapi_xlat);
 
@@ -2469,14 +2487,16 @@ out_unlock:
  *      spin_lock_irqsave(host_set lock)
  */
 
-void ata_scsi_simulate(u16 *id,
+void ata_scsi_simulate(struct ata_port *ap, struct ata_device *dev,
                       struct scsi_cmnd *cmd,
                       void (*done)(struct scsi_cmnd *))
 {
         struct ata_scsi_args args;
         const u8 *scsicmd = cmd->cmnd;
 
-        args.id = id;
+        args.ap = ap;
+        args.dev = dev;
+        args.id = dev->id;
         args.cmd = cmd;
         args.done = done;