drm/radeon/kms: simplify memory controller setup V2

Get rid of _location and use _start/_end also simplify the
computation of vram_start|end & gtt_start|end. For R1XX-R2XX
we place VRAM at the same address of PCI aperture, those GPU
shouldn't have much memory and seems to behave better when
setup that way. For R3XX and newer we place VRAM at 0. For
R6XX-R7XX AGP we place VRAM before or after AGP aperture this
might limit to limit the VRAM size but it's very unlikely.
For IGP we don't change the VRAM placement.

Tested on (compiz,quake3,suspend/resume):
PCI/PCIE:RV280,R420,RV515,RV570,RV610,RV710
AGP:RV100,RV280,R420,RV350,RV620(RPB*),RV730
IGP:RS480(RPB*),RS690,RS780(RPB*),RS880

RPB: resume previously broken

V2 correct commit message to reflect more accurately the bug
and move VRAM placement to 0 for most of the GPU to avoid
limiting VRAM.

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

1 files changed, 15 insertions, 12 deletions

diff --git a/drivers/gpu/drm/radeon/r300.c b/drivers/gpu/drm/radeon/r300.c
index a4f3952..7e9f956 100644
--- a/drivers/gpu/drm/radeon/r300.c
+++ b/drivers/gpu/drm/radeon/r300.c
@@ -121,15 +121,15 @@ int rv370_pcie_gart_enable(struct radeon_device *rdev)
 	/* discard memory request outside of configured range */
 	tmp = RADEON_PCIE_TX_GART_UNMAPPED_ACCESS_DISCARD;
 	WREG32_PCIE(RADEON_PCIE_TX_GART_CNTL, tmp);
-	WREG32_PCIE(RADEON_PCIE_TX_GART_START_LO, rdev->mc.gtt_location);
-	tmp = rdev->mc.gtt_location + rdev->mc.gtt_size - RADEON_GPU_PAGE_SIZE;
+	WREG32_PCIE(RADEON_PCIE_TX_GART_START_LO, rdev->mc.gtt_start);
+	tmp = rdev->mc.gtt_end & ~RADEON_GPU_PAGE_MASK;
 	WREG32_PCIE(RADEON_PCIE_TX_GART_END_LO, tmp);
 	WREG32_PCIE(RADEON_PCIE_TX_GART_START_HI, 0);
 	WREG32_PCIE(RADEON_PCIE_TX_GART_END_HI, 0);
 	table_addr = rdev->gart.table_addr;
 	WREG32_PCIE(RADEON_PCIE_TX_GART_BASE, table_addr);
 	/* FIXME: setup default page */
-	WREG32_PCIE(RADEON_PCIE_TX_DISCARD_RD_ADDR_LO, rdev->mc.vram_location);
+	WREG32_PCIE(RADEON_PCIE_TX_DISCARD_RD_ADDR_LO, rdev->mc.vram_start);
 	WREG32_PCIE(RADEON_PCIE_TX_DISCARD_RD_ADDR_HI, 0);
 	/* Clear error */
 	WREG32_PCIE(0x18, 0);
@@ -459,13 +459,12 @@ int r300_gpu_reset(struct radeon_device *rdev)
 /*
  * r300,r350,rv350,rv380 VRAM info
  */
-void r300_vram_info(struct radeon_device *rdev)
+void r300_mc_init(struct radeon_device *rdev)
 {
 	uint32_t tmp;
 
 	/* DDR for all card after R300 & IGP */
 	rdev->mc.vram_is_ddr = true;
-
 	tmp = RREG32(RADEON_MEM_CNTL);
 	tmp &= R300_MEM_NUM_CHANNELS_MASK;
 	switch (tmp) {
@@ -474,8 +473,9 @@ void r300_vram_info(struct radeon_device *rdev)
 	case 2: rdev->mc.vram_width = 256; break;
 	default:  rdev->mc.vram_width = 128; break;
 	}
-
 	r100_vram_init_sizes(rdev);
+	if (!(rdev->flags & RADEON_IS_AGP))
+		radeon_gtt_location(rdev, &rdev->mc);
 }
 
 void rv370_set_pcie_lanes(struct radeon_device *rdev, int lanes)
@@ -1377,12 +1377,15 @@ int r300_init(struct radeon_device *rdev)
 	radeon_get_clock_info(rdev->ddev);
 	/* Initialize power management */
 	radeon_pm_init(rdev);
-	/* Get vram informations */
-	r300_vram_info(rdev);
-	/* Initialize memory controller (also test AGP) */
-	r = r420_mc_init(rdev);
-	if (r)
-		return r;
+	/* initialize AGP */
+	if (rdev->flags & RADEON_IS_AGP) {
+		r = radeon_agp_init(rdev);
+		if (r) {
+			radeon_agp_disable(rdev);
+		}
+	}
+	/* initialize memory controller */
+	r300_mc_init(rdev);
 	/* Fence driver */
 	r = radeon_fence_driver_init(rdev);
 	if (r)