[Qemu-devel] [PATCH 06/16] ahci: record ncq failures

[John Snow <jsnow@redhat.com>]

Handle NCQ failures for cases where we want to halt the VM on IO errors.

Signed-off-by: John Snow <jsnow@redhat.com>
---
 hw/ide/ahci.c     | 17 +++++++++++++++--
 hw/ide/ahci.h     |  1 +
 hw/ide/internal.h |  1 +
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c
index 71b5085..a838317 100644
--- a/hw/ide/ahci.c
+++ b/hw/ide/ahci.c
@@ -959,13 +959,25 @@ static void ncq_cb(void *opaque, int ret)
         return;
     }
 
+    ncq_tfs->halt = false;
     if (ret < 0) {
-        ncq_err(ncq_tfs);
+        bool is_read = ncq_tfs->cmd == READ_FPDMA_QUEUED;
+        BlockErrorAction action = blk_get_error_action(ide_state->blk,
+                                                       is_read, -ret);
+        if (action == BLOCK_ERROR_ACTION_STOP) {
+            ncq_tfs->halt = true;
+            ide_state->bus->error_status = IDE_RETRY_HBA;
+        } else if (action == BLOCK_ERROR_ACTION_REPORT) {
+            ncq_err(ncq_tfs);
+        }
+        blk_error_action(ide_state->blk, action, is_read, -ret);
     } else {
         ide_state->status = READY_STAT | SEEK_STAT;
     }
 
-    ncq_finish(ncq_tfs);
+    if (!ncq_tfs->halt) {
+        ncq_finish(ncq_tfs);
+    }
 }
 
 static int is_ncq(uint8_t ata_cmd)
@@ -1042,6 +1054,7 @@ static void process_ncq_command(AHCIState *s, int port, uint8_t *cmd_fis,
     }
 
     ncq_tfs->used = 1;
+    ncq_tfs->halt = false;
     ncq_tfs->drive = ad;
     ncq_tfs->slot = slot;
     ncq_tfs->cmd = ncq_fis->command;
diff --git a/hw/ide/ahci.h b/hw/ide/ahci.h
index 33607d7..47a3122 100644
--- a/hw/ide/ahci.h
+++ b/hw/ide/ahci.h
@@ -262,6 +262,7 @@ typedef struct NCQTransferState {
     uint8_t cmd;
     int slot;
     int used;
+    bool halt;
 } NCQTransferState;
 
 struct AHCIDevice {
diff --git a/hw/ide/internal.h b/hw/ide/internal.h
index 7a4a86d..5abee19 100644
--- a/hw/ide/internal.h
+++ b/hw/ide/internal.h
@@ -499,6 +499,7 @@ struct IDEDevice {
 #define IDE_RETRY_READ  0x20
 #define IDE_RETRY_FLUSH 0x40
 #define IDE_RETRY_TRIM 0x80
+#define IDE_RETRY_HBA  0x100
 
 static inline IDEState *idebus_active_if(IDEBus *bus)
 {
-- 
2.1.0