drm/radeon/kms: check if vm is supported in VA ioctl

Add a VM manager enabled field and use it to check if
vm is enabled.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: jglisse@redhat.com
Signed-off-by: Dave Airlie <airlied@redhat.com>

4 files changed, 18 insertions, 3 deletions

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 7cb63cd2e738..73e05cb85eca 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -668,6 +668,8 @@ struct radeon_vm_manager {
         unsigned                        nvm;
         /* vram base address for page table entry  */
         u64                             vram_base_offset;
+        /* is vm enabled? */
+        bool                            enabled;
 };
 
 /*
diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c
index 17af0e83c328..435a3d970ab8 100644
--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -234,8 +234,8 @@ int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data)
         }
 
         if ((p->cs_flags & RADEON_CS_USE_VM) &&
-            (p->rdev->family < CHIP_CAYMAN)) {
-                DRM_ERROR("VM not supported on asic!\n");
+            !p->rdev->vm_manager.enabled) {
+                DRM_ERROR("VM not active on asic!\n");
                 if (p->chunk_relocs_idx != -1)
                         kfree(p->chunks[p->chunk_relocs_idx].kdata);
                 if (p->chunk_flags_idx != -1)
diff --git a/drivers/gpu/drm/radeon/radeon_gart.c b/drivers/gpu/drm/radeon/radeon_gart.c
index 3ef58cab18c9..8597d2c016e6 100644
--- a/drivers/gpu/drm/radeon/radeon_gart.c
+++ b/drivers/gpu/drm/radeon/radeon_gart.c
@@ -286,6 +286,8 @@ int radeon_vm_manager_init(struct radeon_device *rdev)
 {
         int r;
 
+        rdev->vm_manager.enabled = false;
+
         /* mark first vm as always in use, it's the system one */
         r = radeon_sa_bo_manager_init(rdev, &rdev->vm_manager.sa_manager,
                                       rdev->vm_manager.max_pfn * 8,
@@ -295,7 +297,12 @@ int radeon_vm_manager_init(struct radeon_device *rdev)
                         (rdev->vm_manager.max_pfn * 8) >> 10);
                 return r;
         }
-        return rdev->vm_manager.funcs->init(rdev);
+
+        r = rdev->vm_manager.funcs->init(rdev);
+        if (r == 0)
+                rdev->vm_manager.enabled = true;
+
+        return r;
 }
 
 /* cs mutex must be lock */
@@ -334,6 +341,7 @@ void radeon_vm_manager_fini(struct radeon_device *rdev)
         radeon_vm_manager_suspend(rdev);
         rdev->vm_manager.funcs->fini(rdev);
         radeon_sa_bo_manager_fini(rdev, &rdev->vm_manager.sa_manager);
+        rdev->vm_manager.enabled = false;
 }
 
 int radeon_vm_manager_start(struct radeon_device *rdev)
diff --git a/drivers/gpu/drm/radeon/radeon_gem.c b/drivers/gpu/drm/radeon/radeon_gem.c
index 003eeec1b688..7337850af2fa 100644
--- a/drivers/gpu/drm/radeon/radeon_gem.c
+++ b/drivers/gpu/drm/radeon/radeon_gem.c
@@ -404,6 +404,11 @@ int radeon_gem_va_ioctl(struct drm_device *dev, void *data,
         u32 invalid_flags;
         int r = 0;
 
+        if (!rdev->vm_manager.enabled) {
+                args->operation = RADEON_VA_RESULT_ERROR;
+                return -ENOTTY;
+        }
+
         /* !! DONT REMOVE !!
          * We don't support vm_id yet, to be sure we don't have have broken
          * userspace, reject anyone trying to use non 0 value thus moving