[PATCH 5/8] accel/ivpu: Print CMDQ errors after consumer timeout

[Stanislaw Gruszka]

From: Karol Wachowski <karol.wachow...@linux.intel.com>

Add checking of error reason bits in IVPU_MMU_CMDQ_CONS
register when waiting for consumer timeout occurred.

Signed-off-by: Karol Wachowski <karol.wachow...@linux.intel.com>
Reviewed-by: Stanislaw Gruszka <stanislaw.grus...@linux.intel.com>
Signed-off-by: Stanislaw Gruszka <stanislaw.grus...@linux.intel.com>
---
 drivers/accel/ivpu/ivpu_mmu.c | 34 +++++++++++++++++++++++++++++++---
 1 file changed, 31 insertions(+), 3 deletions(-)

diff --git a/drivers/accel/ivpu/ivpu_mmu.c b/drivers/accel/ivpu/ivpu_mmu.c
index 2538c78fbebe..b15cf9cc9c43 100644
--- a/drivers/accel/ivpu/ivpu_mmu.c
+++ b/drivers/accel/ivpu/ivpu_mmu.c
@@ -230,7 +230,12 @@
                                  (REG_FLD(IVPU_MMU_REG_GERROR, MSI_PRIQ_ABT)) 
| \
                                  (REG_FLD(IVPU_MMU_REG_GERROR, MSI_ABT)))
 
-static char *ivpu_mmu_event_to_str(u32 cmd)
+#define IVPU_MMU_CERROR_NONE         0x0
+#define IVPU_MMU_CERROR_ILL          0x1
+#define IVPU_MMU_CERROR_ABT          0x2
+#define IVPU_MMU_CERROR_ATC_INV_SYNC 0x3
+
+static const char *ivpu_mmu_event_to_str(u32 cmd)
 {
        switch (cmd) {
        case IVPU_MMU_EVT_F_UUT:
@@ -276,6 +281,22 @@ static char *ivpu_mmu_event_to_str(u32 cmd)
        }
 }
 
+static const char *ivpu_mmu_cmdq_err_to_str(u32 err)
+{
+       switch (err) {
+       case IVPU_MMU_CERROR_NONE:
+               return "No CMDQ Error";
+       case IVPU_MMU_CERROR_ILL:
+               return "Illegal command";
+       case IVPU_MMU_CERROR_ABT:
+               return "External abort on CMDQ read";
+       case IVPU_MMU_CERROR_ATC_INV_SYNC:
+               return "Sync failed to complete ATS invalidation";
+       default:
+               return "Unknown CMDQ Error";
+       }
+}
+
 static void ivpu_mmu_config_check(struct ivpu_device *vdev)
 {
        u32 val_ref;
@@ -492,8 +513,15 @@ static int ivpu_mmu_cmdq_sync(struct ivpu_device *vdev)
        REGV_WR32(IVPU_MMU_REG_CMDQ_PROD, q->prod);
 
        ret = ivpu_mmu_cmdq_wait_for_cons(vdev);
-       if (ret)
-               ivpu_err(vdev, "Timed out waiting for consumer: %d\n", ret);
+       if (ret) {
+               u32 err;
+
+               val = REGV_RD32(IVPU_MMU_REG_CMDQ_CONS);
+               err = REG_GET_FLD(IVPU_MMU_REG_CMDQ_CONS, ERR, val);
+
+               ivpu_err(vdev, "Timed out waiting for MMU consumer: %d, error: 
%s\n", ret,
+                        ivpu_mmu_cmdq_err_to_str(err));
+       }
 
        return ret;
 }
-- 
2.25.1