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drm/radeon: Use direct mapping for fast fb access on RS780/RS880 (v2)

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v2: fix trailing whitespace

Signed-off-by: Samuel Li <samuel.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Samuel Li
2013-04-05 17:50:53 -04:00
committed by Alex Deucher
parent e49f3959a9
commit 65337e60a7
4 changed files with 57 additions and 0 deletions
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43
drivers/gpu/drm/radeon/r600.c
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@@ -1046,6 +1046,24 @@ int r600_mc_wait_for_idle(struct radeon_device *rdev)
return -1;
}
uint32_t rs780_mc_rreg(struct radeon_device *rdev, uint32_t reg)
{
uint32_t r;
WREG32(R_0028F8_MC_INDEX, S_0028F8_MC_IND_ADDR(reg));
r = RREG32(R_0028FC_MC_DATA);
WREG32(R_0028F8_MC_INDEX, ~C_0028F8_MC_IND_ADDR);
return r;
}
void rs780_mc_wreg(struct radeon_device *rdev, uint32_t reg, uint32_t v)
{
WREG32(R_0028F8_MC_INDEX, S_0028F8_MC_IND_ADDR(reg) |
S_0028F8_MC_IND_WR_EN(1));
WREG32(R_0028FC_MC_DATA, v);
WREG32(R_0028F8_MC_INDEX, 0x7F);
}
static void r600_mc_program(struct radeon_device *rdev)
{
struct rv515_mc_save save;
@@ -1181,6 +1199,8 @@ static int r600_mc_init(struct radeon_device *rdev)
{
u32 tmp;
int chansize, numchan;
uint32_t h_addr, l_addr;
unsigned long long k8_addr;
/* Get VRAM informations */
rdev->mc.vram_is_ddr = true;
@@ -1221,7 +1241,30 @@ static int r600_mc_init(struct radeon_device *rdev)
if (rdev->flags & RADEON_IS_IGP) {
rs690_pm_info(rdev);
rdev->mc.igp_sideport_enabled = radeon_atombios_sideport_present(rdev);
if (rdev->family == CHIP_RS780 || rdev->family == CHIP_RS880) {
/* Use K8 direct mapping for fast fb access. */
rdev->fastfb_working = false;
h_addr = G_000012_K8_ADDR_EXT(RREG32_MC(R_000012_MC_MISC_UMA_CNTL));
l_addr = RREG32_MC(R_000011_K8_FB_LOCATION);
k8_addr = ((unsigned long long)h_addr) << 32 | l_addr;
#if defined(CONFIG_X86_32) && !defined(CONFIG_X86_PAE)
if (k8_addr + rdev->mc.visible_vram_size < 0x100000000ULL)
#endif
{
/* FastFB shall be used with UMA memory. Here it is simply disabled when sideport
* memory is present.
*/
if (rdev->mc.igp_sideport_enabled == false && radeon_fastfb == 1) {
DRM_INFO("Direct mapping: aper base at 0x%llx, replaced by direct mapping base 0x%llx.\n",
(unsigned long long)rdev->mc.aper_base, k8_addr);
rdev->mc.aper_base = (resource_size_t)k8_addr;
rdev->fastfb_working = true;
}
}
}
}
radeon_update_bandwidth_info(rdev);
return 0;
}