drm/radeon/kms: clear confusion in GART init/deinit path
GART static one time initialization was mixed up with GART
enabling/disabling which could happen several time for instance
during suspend/resume cycles. This patch splits all GART
handling into 4 differents function. gart_init is for one
time initialization, gart_deinit is called upon module unload
to free resources allocated by gart_init, gart_enable enable
the GART and is intented to be call after first initialization
and at each resume cycle or reset cycle. Finaly gart_disable
stop the GART and is intended to be call at suspend time or
when unloading the module.
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c
index 1b8d62f..c31bd84 100644
--- a/drivers/gpu/drm/radeon/rs600.c
+++ b/drivers/gpu/drm/radeon/rs600.c
@@ -68,22 +68,35 @@
tmp = RREG32_MC(RS600_MC_PT0_CNTL);
}
-int rs600_gart_enable(struct radeon_device *rdev)
+int rs600_gart_init(struct radeon_device *rdev)
{
- uint32_t tmp;
- int i;
int r;
+ if (rdev->gart.table.vram.robj) {
+ WARN(1, "RS600 GART already initialized.\n");
+ return 0;
+ }
/* Initialize common gart structure */
r = radeon_gart_init(rdev);
if (r) {
return r;
}
rdev->gart.table_size = rdev->gart.num_gpu_pages * 8;
- r = radeon_gart_table_vram_alloc(rdev);
- if (r) {
- return r;
+ return radeon_gart_table_vram_alloc(rdev);
+}
+
+int rs600_gart_enable(struct radeon_device *rdev)
+{
+ uint32_t tmp;
+ int r, i;
+
+ if (rdev->gart.table.vram.robj == NULL) {
+ dev_err(rdev->dev, "No VRAM object for PCIE GART.\n");
+ return -EINVAL;
}
+ r = radeon_gart_table_vram_pin(rdev);
+ if (r)
+ return r;
/* FIXME: setup default page */
WREG32_MC(RS600_MC_PT0_CNTL,
(RS600_EFFECTIVE_L2_CACHE_SIZE(6) |
@@ -138,8 +151,17 @@
tmp = RREG32_MC(RS600_MC_CNTL1);
tmp &= ~RS600_ENABLE_PAGE_TABLES;
WREG32_MC(RS600_MC_CNTL1, tmp);
- radeon_object_kunmap(rdev->gart.table.vram.robj);
- radeon_object_unpin(rdev->gart.table.vram.robj);
+ if (rdev->gart.table.vram.robj) {
+ radeon_object_kunmap(rdev->gart.table.vram.robj);
+ radeon_object_unpin(rdev->gart.table.vram.robj);
+ }
+}
+
+void rs600_gart_fini(struct radeon_device *rdev)
+{
+ rs600_gart_disable(rdev);
+ radeon_gart_table_vram_free(rdev);
+ radeon_gart_fini(rdev);
}
#define R600_PTE_VALID (1 << 0)
@@ -235,9 +257,6 @@
void rs600_mc_fini(struct radeon_device *rdev)
{
- rs600_gart_disable(rdev);
- radeon_gart_table_vram_free(rdev);
- radeon_gart_fini(rdev);
}