Changeset 125 for trunk/src/os2ahci/os2ahci.c

Timestamp:

Oct 8, 2011, 10:28:48 PM (14 years ago)

Author:

cjm

Message:

Version 1.21

---

• Triggered by reports of performance loss with NCQ
• New command line flag "/F" to force using write buffers even when upstream I/O requested non-buffered I/O; the primary purpose of this flag is to debug the NCQ performance drop but the flag may or may not remain.

File:

• trunk/src/os2ahci/os2ahci.c (modified) (4 diffs)

trunk/src/os2ahci/os2ahci.c

@@ -73 +73 @@
 int             thorough_scan = 1; /* if != 0, perform thorough PCI scan */
 int             init_reset;        /* if != 0, reset ports during init */
+int             force_write_cache; /* if != 0, force write cache */
 int             verbosity = 1;     /* == 1 -> show sign on banner
                                     *  > 1 -> show adapter info during boot */
@@ -233 +234 @@
         /* reset ports during initialization */
         init_reset = 1;
+        break;
+
+      case 'f':
+        /* force write cache regardless of IORB flags */
+        force_write_cache = 1;
         break;
 
@@ -387 +393 @@
  * Generic IOCTL via character device driver. IOCTLs are used to control the
  * driver operation and to execute native ATA and ATAPI (SCSI) commands from
- * ring 3 applications.
+ * ring 3 applications. On top of that, some predefined IOCTLs (e.g. SMART
+ * commands for ATA disks) are implemented here.
  */
 USHORT gen_ioctl(RP_GENIOCTL _far *ioctl)
 {
+  dprintf("IOCTL 0x%x/0x%x\n", (u16) ioctl->Category, (u16) ioctl->Function);
+
   switch (ioctl->Category) {
 
   case OS2AHCI_IOCTL_CATEGORY:
-
     switch (ioctl->Function) {
 
@@ -404 +412 @@
 
     }
-  }
+
+  case DSKSP_CAT_GENERIC:
+    return(ioctl_gen_dsk(ioctl));
+    
+  case DSKSP_CAT_SMART:
+    return(ioctl_smart(ioctl));
+
+  }
+
   return(STDON | STATUS_ERR_UNKCMD);
 }