drm/xe: Implement HW workaround 14016763929

To workaround a HW bug on DG2, driver is required to map the whole
ppgtt virtual address space before GPU workload submission. Thus
set the XE_VM_FLAG_SCRATCH_PAGE flag during vm create so the whole
address space is mapped to point to scratch page.

v1:
  - Move the workaround implementation from xe_vm_create to
    xe_vm_create_ioctl - Brian
  - Reorder error checking in xe_vm_create_ioctl - Jose
  - Implement WA only for DG2-G10 and DG2-G12

Signed-off-by: Oak Zeng <oak.zeng@intel.com>
Reviewed-by: Brian Welty <brian.welty@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

diff --git a/drivers/gpu/drm/xe/Makefile b/drivers/gpu/drm/xe/Makefile
index 2373832..b470c23 100644 (file)
--- a/drivers/gpu/drm/xe/Makefile
+++ b/drivers/gpu/drm/xe/Makefile
@@ -40,7 +40,7 @@ quiet_cmd_wa_oob = GEN     $(notdir $(generated_oob))
 $(generated_oob) &: $(obj)/xe_gen_wa_oob $(srctree)/$(src)/xe_wa_oob.rules
        $(call cmd,wa_oob)
 
-$(obj)/xe_guc.o $(obj)/xe_wa.o $(obj)/xe_ring_ops.o: $(generated_oob)
+$(obj)/xe_guc.o $(obj)/xe_wa.o $(obj)/xe_ring_ops.o $(obj)/xe_vm.o: $(generated_oob)
 
 # Please keep these build lists sorted!
 

diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index ff7fafe..8b75595 100644 (file)
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -29,6 +29,8 @@
 #include "xe_res_cursor.h"
 #include "xe_sync.h"
 #include "xe_trace.h"
+#include "generated/xe_wa_oob.h"
+#include "xe_wa.h"
 
 #define TEST_VM_ASYNC_OPS_ERROR
 
@@ -1979,6 +1981,13 @@ int xe_vm_create_ioctl(struct drm_device *dev, void *data,
        int err;
        u32 flags = 0;
 
+       if (XE_WA(xe_root_mmio_gt(xe), 14016763929))
+               args->flags |= DRM_XE_VM_CREATE_SCRATCH_PAGE;
+
+       if (XE_IOCTL_DBG(xe, args->flags & DRM_XE_VM_CREATE_FAULT_MODE &&
+                        !xe->info.supports_usm))
+               return -EINVAL;
+
        if (XE_IOCTL_DBG(xe, args->reserved[0] || args->reserved[1]))
                return -EINVAL;
 
@@ -2001,10 +2010,6 @@ int xe_vm_create_ioctl(struct drm_device *dev, void *data,
                         xe_device_in_fault_mode(xe)))
                return -EINVAL;
 
-       if (XE_IOCTL_DBG(xe, args->flags & DRM_XE_VM_CREATE_FAULT_MODE &&
-                        !xe->info.supports_usm))
-               return -EINVAL;
-
        if (args->flags & DRM_XE_VM_CREATE_SCRATCH_PAGE)
                flags |= XE_VM_FLAG_SCRATCH_PAGE;
        if (args->flags & DRM_XE_VM_CREATE_COMPUTE_MODE)

diff --git a/drivers/gpu/drm/xe/xe_wa_oob.rules b/drivers/gpu/drm/xe/xe_wa_oob.rules
index 15c2381..ea90dcc 100644 (file)
--- a/drivers/gpu/drm/xe/xe_wa_oob.rules
+++ b/drivers/gpu/drm/xe/xe_wa_oob.rules
@@ -15,3 +15,5 @@
 18020744125    PLATFORM(PVC)
 1509372804     PLATFORM(PVC), GRAPHICS_STEP(A0, C0)
 1409600907     GRAPHICS_VERSION_RANGE(1200, 1250)
+14016763929    SUBPLATFORM(DG2, G10)
+               SUBPLATFORM(DG2, G12)