drm/radeon/kms: simplify & improve GPU reset V2

This simplify and improve GPU reset for R1XX-R6XX hw, it's
not 100% reliable here are result:
- R1XX/R2XX works bunch of time in a row, sometimes it
  seems it can work indifinitly
- R3XX/R3XX the most unreliable one, sometimes you will be
  able to reset few times, sometimes not even once
- R5XX more reliable than previous hw, seems to work most
  of the times but once in a while it fails for no obvious
  reasons (same status than previous reset just no same
  happy ending)
- R6XX/R7XX are lot more reliable with this patch, still
  it seems that it can fail after a bunch (reset every
  2sec for 3hour bring down the GPU & computer)

This have been tested on various hw, for some odd reasons
i wasn't able to lockup RS480/RS690 (while they use to
love locking up).

Note that on R1XX-R5XX the cursor will disapear after
lockup haven't checked why, switch to console and back
to X will restore cursor.

Next step is to record the bogus command that leaded to
the lockup.

V2 Fix r6xx resume path to avoid reinitializing blit
module, use the gpu_lockup boolean to avoid entering
inifinite waiting loop on fence while reiniting the GPU

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index 011ac6d86581..0d7664b8e489 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -367,7 +367,7 @@ static struct radeon_asic rs600_asic = {
 	.resume = &rs600_resume,
 	.vga_set_state = &r100_vga_set_state,
 	.gpu_is_lockup = &r300_gpu_is_lockup,
-	.asic_reset = &r300_asic_reset,
+	.asic_reset = &rs600_asic_reset,
 	.gart_tlb_flush = &rs600_gart_tlb_flush,
 	.gart_set_page = &rs600_gart_set_page,
 	.cp_commit = &r100_cp_commit,
@@ -406,7 +406,7 @@ static struct radeon_asic rs690_asic = {
 	.resume = &rs690_resume,
 	.vga_set_state = &r100_vga_set_state,
 	.gpu_is_lockup = &r300_gpu_is_lockup,
-	.asic_reset = &r300_asic_reset,
+	.asic_reset = &rs600_asic_reset,
 	.gart_tlb_flush = &rs400_gart_tlb_flush,
 	.gart_set_page = &rs400_gart_set_page,
 	.cp_commit = &r100_cp_commit,
@@ -445,7 +445,7 @@ static struct radeon_asic rv515_asic = {
 	.resume = &rv515_resume,
 	.vga_set_state = &r100_vga_set_state,
 	.gpu_is_lockup = &r300_gpu_is_lockup,
-	.asic_reset = &rv515_asic_reset,
+	.asic_reset = &rs600_asic_reset,
 	.gart_tlb_flush = &rv370_pcie_gart_tlb_flush,
 	.gart_set_page = &rv370_pcie_gart_set_page,
 	.cp_commit = &r100_cp_commit,
@@ -484,7 +484,7 @@ static struct radeon_asic r520_asic = {
 	.resume = &r520_resume,
 	.vga_set_state = &r100_vga_set_state,
 	.gpu_is_lockup = &r300_gpu_is_lockup,
-	.asic_reset = &rv515_asic_reset,
+	.asic_reset = &rs600_asic_reset,
 	.gart_tlb_flush = &rv370_pcie_gart_tlb_flush,
 	.gart_set_page = &rv370_pcie_gart_set_page,
 	.cp_commit = &r100_cp_commit,
@@ -560,6 +560,7 @@ static struct radeon_asic rs780_asic = {
 	.suspend = &r600_suspend,
 	.resume = &r600_resume,
 	.cp_commit = &r600_cp_commit,
+	.gpu_is_lockup = &r600_gpu_is_lockup,
 	.vga_set_state = &r600_vga_set_state,
 	.asic_reset = &r600_asic_reset,
 	.gart_tlb_flush = &r600_pcie_gart_tlb_flush,