Changeset dd8b6a8 in mainline for uspace/drv/bus/usb/usbmast/scsi_ms.c

Timestamp:

2014-08-27T23:56:16Z (11 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

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

Children:

95fe55ca

Parents:

f27f3fd

Message:

Add synchronize cache operation to block layer and usbmast.

File:

• uspace/drv/bus/usb/usbmast/scsi_ms.c (modified) (1 diff)

uspace/drv/bus/usb/usbmast/scsi_ms.c

@@ -383 +383 @@
 }
 
+/** Perform SCSI Synchronize Cache command on USB mass storage device.
+ *
+ * @param mfun          Mass storage function
+ * @param ba            Address of first block
+ * @param nblocks       Number of blocks to read
+ * @param data          Data to write
+ *
+ * @return              Error code
+ */
+int usbmast_sync_cache(usbmast_fun_t *mfun, uint64_t ba, size_t nblocks)
+{
+        scsi_cmd_t cmd;
+        scsi_cdb_sync_cache_10_t cdb;
+        int rc;
+
+        if (ba > UINT32_MAX)
+                return ELIMIT;
+
+        if (nblocks > UINT16_MAX)
+                return ELIMIT;
+
+        memset(&cdb, 0, sizeof(cdb));
+        cdb.op_code = SCSI_CMD_SYNC_CACHE_10;
+        cdb.lba = host2uint32_t_be(ba);
+        cdb.numlb = host2uint16_t_be(nblocks);
+
+        memset(&cmd, 0, sizeof(cmd));
+        cmd.cdb = &cdb;
+        cmd.cdb_size = sizeof(cdb);
+
+        rc = usbmast_run_cmd(mfun, &cmd);
+
+        if (rc != EOK) {
+                usb_log_error("Synchronize Cache (10) transport failed, device %s: %s.\n",
+                   ddf_dev_get_name(mfun->mdev->ddf_dev), str_error(rc));
+                return rc;
+        }
+
+        if (cmd.status != CMDS_GOOD) {
+                usb_log_error("Synchronize Cache (10) command failed, device %s.\n",
+                   ddf_dev_get_name(mfun->mdev->ddf_dev));
+                return EIO;
+        }
+
+        return EOK;
+}
+
 /**
  * @}