Changeset 4abe919 in mainline

Timestamp:

2014-08-28T10:52:08Z (10 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

3a7db87

Parents:

4236b18

Message:

Add sync cache operation for ATA devices.

Location:

uspace/drv/block/ata_bd

Files:

• ata_bd.c (modified) (6 diffs)
• ata_hw.h (modified) (1 diff)

uspace/drv/block/ata_bd/ata_bd.c

@@ -97 +97 @@
 static int ata_bd_get_block_size(bd_srv_t *, size_t *);
 static int ata_bd_get_num_blocks(bd_srv_t *, aoff64_t *);
+static int ata_bd_sync_cache(bd_srv_t *, aoff64_t, size_t);
 
 static int ata_rcmd_read(disk_t *disk, uint64_t ba, size_t cnt,
@@ -102 +103 @@
 static int ata_rcmd_write(disk_t *disk, uint64_t ba, size_t cnt,
     const void *buf);
+static int ata_rcmd_flush_cache(disk_t *disk);
 static int disk_init(ata_ctrl_t *ctrl, disk_t *d, int disk_id);
 static int ata_identify_dev(disk_t *disk, void *buf);
@@ -129 +131 @@
         .write_blocks = ata_bd_write_blocks,
         .get_block_size = ata_bd_get_block_size,
-        .get_num_blocks = ata_bd_get_num_blocks
+        .get_num_blocks = ata_bd_get_num_blocks,
+        .sync_cache = ata_bd_sync_cache
 };
 
@@ -586 +589 @@
 }
 
+/** Flush cache. */
+static int ata_bd_sync_cache(bd_srv_t *bd, uint64_t ba, size_t cnt)
+{
+        disk_t *disk = bd_srv_disk(bd);
+
+        /* ATA cannot flush just some blocks, we just flush everything. */
+        (void)ba;
+        (void)cnt;
+
+        return ata_rcmd_flush_cache(disk);
+}
+
 /** PIO data-in command protocol. */
 static int ata_pio_data_in(disk_t *disk, void *obuf, size_t obuf_size,
@@ -639 +654 @@
                 }
         }
+
+        if (status & SR_ERR)
+                return EIO;
+
+        return EOK;
+}
+
+/** PIO non-data command protocol. */
+static int ata_pio_nondata(disk_t *disk)
+{
+        ata_ctrl_t *ctrl = disk->ctrl;
+        uint8_t status;
+
+        if (wait_status(ctrl, 0, ~SR_BSY, &status, TIMEOUT_BSY) != EOK)
+                return EIO;
 
         if (status & SR_ERR)
@@ -1076 +1106 @@
         rc = ata_pio_data_out(disk, buf, cnt * disk->block_size,
             disk->block_size, cnt);
+
+        fibril_mutex_unlock(&ctrl->lock);
+        return rc;
+}
+
+/** Flush cached data to nonvolatile storage.
+ *
+ * @param disk          Disk
+ *
+ * @return EOK on success, EIO on error.
+ */
+static int ata_rcmd_flush_cache(disk_t *disk)
+{
+        ata_ctrl_t *ctrl = disk->ctrl;
+        uint8_t drv_head;
+        int rc;
+
+        /* New value for Drive/Head register */
+        drv_head =
+            (disk_dev_idx(disk) != 0) ? DHR_DRV : 0;
+
+        fibril_mutex_lock(&ctrl->lock);
+
+        /* Program a Flush Cache operation. */
+
+        if (wait_status(ctrl, 0, ~SR_BSY, NULL, TIMEOUT_BSY) != EOK) {
+                fibril_mutex_unlock(&ctrl->lock);
+                return EIO;
+        }
+
+        pio_write_8(&ctrl->cmd->drive_head, drv_head);
+
+        if (wait_status(ctrl, SR_DRDY, ~SR_BSY, NULL, TIMEOUT_DRDY) != EOK) {
+                fibril_mutex_unlock(&ctrl->lock);
+                return EIO;
+        }
+
+        pio_write_8(&ctrl->cmd->command, CMD_FLUSH_CACHE);
+
+        rc = ata_pio_nondata(disk);
 
         fibril_mutex_unlock(&ctrl->lock);

uspace/drv/block/ata_bd/ata_hw.h

@@ -136 +136 @@
         CMD_PACKET              = 0xA0,
         CMD_IDENTIFY_PKT_DEV    = 0xA1,
-        CMD_IDENTIFY_DRIVE      = 0xEC
+        CMD_IDENTIFY_DRIVE      = 0xEC,
+        CMD_FLUSH_CACHE         = 0xE7
 };