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, 11 insertions, 27 deletions

diff --git a/drivers/gpu/drm/radeon/rs400.c b/drivers/gpu/drm/radeon/rs400.c
index 1e4582e27c14..626d51891ee9 100644
--- a/drivers/gpu/drm/radeon/rs400.c
+++ b/drivers/gpu/drm/radeon/rs400.c
@@ -151,9 +151,8 @@ int rs400_gart_enable(struct radeon_device *rdev)
 		WREG32(RADEON_AGP_BASE, 0xFFFFFFFF);
 		WREG32(RS480_AGP_BASE_2, 0);
 	}
-	tmp = rdev->mc.gtt_location + rdev->mc.gtt_size - 1;
-	tmp = REG_SET(RS690_MC_AGP_TOP, tmp >> 16);
-	tmp |= REG_SET(RS690_MC_AGP_START, rdev->mc.gtt_location >> 16);
+	tmp = REG_SET(RS690_MC_AGP_TOP, rdev->mc.gtt_end >> 16);
+	tmp |= REG_SET(RS690_MC_AGP_START, rdev->mc.gtt_start >> 16);
 	if ((rdev->family == CHIP_RS690) || (rdev->family == CHIP_RS740)) {
 		WREG32_MC(RS690_MCCFG_AGP_LOCATION, tmp);
 		tmp = RREG32(RADEON_BUS_CNTL) & ~RS600_BUS_MASTER_DIS;
@@ -252,14 +251,19 @@ void rs400_gpu_init(struct radeon_device *rdev)
 	}
 }
 
-void rs400_vram_info(struct radeon_device *rdev)
+void rs400_mc_init(struct radeon_device *rdev)
 {
+	u64 base;
+
 	rs400_gart_adjust_size(rdev);
+	rdev->mc.igp_sideport_enabled = radeon_combios_sideport_present(rdev);
 	/* DDR for all card after R300 & IGP */
 	rdev->mc.vram_is_ddr = true;
 	rdev->mc.vram_width = 128;
-
 	r100_vram_init_sizes(rdev);
+	base = (RREG32(RADEON_NB_TOM) & 0xffff) << 16;
+	radeon_vram_location(rdev, &rdev->mc, base);
+	radeon_gtt_location(rdev, &rdev->mc);
 }
 
 uint32_t rs400_mc_rreg(struct radeon_device *rdev, uint32_t reg)
@@ -363,22 +367,6 @@ static int rs400_debugfs_pcie_gart_info_init(struct radeon_device *rdev)
 #endif
 }
 
-static int rs400_mc_init(struct radeon_device *rdev)
-{
-	int r;
-	u32 tmp;
-
-	/* Setup GPU memory space */
-	tmp = RREG32(R_00015C_NB_TOM);
-	rdev->mc.vram_location = G_00015C_MC_FB_START(tmp) << 16;
-	rdev->mc.gtt_location = 0xFFFFFFFFUL;
-	r = radeon_mc_setup(rdev);
-	rdev->mc.igp_sideport_enabled = radeon_combios_sideport_present(rdev);
-	if (r)
-		return r;
-	return 0;
-}
-
 void rs400_mc_program(struct radeon_device *rdev)
 {
 	struct r100_mc_save save;
@@ -517,12 +505,8 @@ int rs400_init(struct radeon_device *rdev)
 	radeon_get_clock_info(rdev->ddev);
 	/* Initialize power management */
 	radeon_pm_init(rdev);
-	/* Get vram informations */
-	rs400_vram_info(rdev);
-	/* Initialize memory controller (also test AGP) */
-	r = rs400_mc_init(rdev);
-	if (r)
-		return r;
+	/* initialize memory controller */
+	rs400_mc_init(rdev);
 	/* Fence driver */
 	r = radeon_fence_driver_init(rdev);
 	if (r)