From a0a53aa8c7b491a43e2ef66786f9511bae8cbc35 Mon Sep 17 00:00:00 2001 From: Samuel Li Date: Mon, 8 Apr 2013 17:25:47 -0400 Subject: [PATCH] drm/radeon: Use direct mapping for fast fb access on RS690 MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This patch allows the CPU to map the stolen vram segment directly rather than going through the PCI BAR. This significantly improves performance for certain workloads with a properly patched ddx. Use radeon.fastfb=1 to enable it (disabled by default). Currently only supported on RS690, but support for RS780/880 and newer APUs may be added eventually. Signed-off-by: Samuel Li Reviewed-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/radeon/radeon.h | 2 ++ drivers/gpu/drm/radeon/radeon_drv.c | 7 ++++++- drivers/gpu/drm/radeon/radeon_kms.c | 3 +++ drivers/gpu/drm/radeon/radeon_object.c | 4 +++- drivers/gpu/drm/radeon/rs690.c | 23 +++++++++++++++++++++++ drivers/gpu/drm/radeon/rs690d.h | 3 +++ include/uapi/drm/radeon_drm.h | 3 +++ 7 files changed, 43 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h index 8bd875304441..730d3359af60 100644 --- a/drivers/gpu/drm/radeon/radeon.h +++ b/drivers/gpu/drm/radeon/radeon.h @@ -95,6 +95,7 @@ extern int radeon_hw_i2c; extern int radeon_pcie_gen2; extern int radeon_msi; extern int radeon_lockup_timeout; +extern int radeon_fastfb; /* * Copy from radeon_drv.h so we don't have to include both and have conflicting @@ -1616,6 +1617,7 @@ struct radeon_device { bool suspend; bool need_dma32; bool accel_working; + bool fastfb_working; /* IGP feature*/ struct radeon_surface_reg surface_regs[RADEON_GEM_MAX_SURFACES]; const struct firmware *me_fw; /* all family ME firmware */ const struct firmware *pfp_fw; /* r6/700 PFP firmware */ diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c index 66a7f0fd9620..b500bbc3e411 100644 --- a/drivers/gpu/drm/radeon/radeon_drv.c +++ b/drivers/gpu/drm/radeon/radeon_drv.c @@ -71,9 +71,10 @@ * 2.28.0 - r600-eg: Add MEM_WRITE packet support * 2.29.0 - R500 FP16 color clear registers * 2.30.0 - fix for FMASK texturing + * 2.31.0 - Add fastfb support for rs690 */ #define KMS_DRIVER_MAJOR 2 -#define KMS_DRIVER_MINOR 30 +#define KMS_DRIVER_MINOR 31 #define KMS_DRIVER_PATCHLEVEL 0 int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags); int radeon_driver_unload_kms(struct drm_device *dev); @@ -160,6 +161,7 @@ int radeon_hw_i2c = 0; int radeon_pcie_gen2 = -1; int radeon_msi = -1; int radeon_lockup_timeout = 10000; +int radeon_fastfb = 0; MODULE_PARM_DESC(no_wb, "Disable AGP writeback for scratch registers"); module_param_named(no_wb, radeon_no_wb, int, 0444); @@ -212,6 +214,9 @@ module_param_named(msi, radeon_msi, int, 0444); MODULE_PARM_DESC(lockup_timeout, "GPU lockup timeout in ms (defaul 10000 = 10 seconds, 0 = disable)"); module_param_named(lockup_timeout, radeon_lockup_timeout, int, 0444); +MODULE_PARM_DESC(fastfb, "Direct FB access for IGP chips (0 = disable, 1 = enable)"); +module_param_named(fastfb, radeon_fastfb, int, 0444); + static struct pci_device_id pciidlist[] = { radeon_PCI_IDS }; diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c index c75cb2c6ba71..f5464482dee8 100644 --- a/drivers/gpu/drm/radeon/radeon_kms.c +++ b/drivers/gpu/drm/radeon/radeon_kms.c @@ -376,6 +376,9 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp) else return -EINVAL; break; + case RADEON_INFO_FASTFB_WORKING: + value = rdev->fastfb_working; + break; default: DRM_DEBUG_KMS("Invalid request %d\n", info->request); return -EINVAL; diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c index d3aface2d12d..58e026afec17 100644 --- a/drivers/gpu/drm/radeon/radeon_object.c +++ b/drivers/gpu/drm/radeon/radeon_object.c @@ -321,8 +321,10 @@ void radeon_bo_force_delete(struct radeon_device *rdev) int radeon_bo_init(struct radeon_device *rdev) { /* Add an MTRR for the VRAM */ - rdev->mc.vram_mtrr = mtrr_add(rdev->mc.aper_base, rdev->mc.aper_size, + if (!rdev->fastfb_working) { + rdev->mc.vram_mtrr = mtrr_add(rdev->mc.aper_base, rdev->mc.aper_size, MTRR_TYPE_WRCOMB, 1); + } DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n", rdev->mc.mc_vram_size >> 20, (unsigned long long)rdev->mc.aper_size >> 20); diff --git a/drivers/gpu/drm/radeon/rs690.c b/drivers/gpu/drm/radeon/rs690.c index 5706d2ac75ab..ab4c86cfd552 100644 --- a/drivers/gpu/drm/radeon/rs690.c +++ b/drivers/gpu/drm/radeon/rs690.c @@ -148,6 +148,8 @@ void rs690_pm_info(struct radeon_device *rdev) static void rs690_mc_init(struct radeon_device *rdev) { u64 base; + uint32_t h_addr, l_addr; + unsigned long long k8_addr; rs400_gart_adjust_size(rdev); rdev->mc.vram_is_ddr = true; @@ -160,6 +162,27 @@ static void rs690_mc_init(struct radeon_device *rdev) base = RREG32_MC(R_000100_MCCFG_FB_LOCATION); base = G_000100_MC_FB_START(base) << 16; rdev->mc.igp_sideport_enabled = radeon_atombios_sideport_present(rdev); + + /* Use K8 direct mapping for fast fb access. */ + rdev->fastfb_working = false; + h_addr = G_00005F_K8_ADDR_EXT(RREG32_MC(R_00005F_MC_MISC_UMA_CNTL)); + l_addr = RREG32_MC(R_00001E_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; + } + } + rs690_pm_info(rdev); radeon_vram_location(rdev, &rdev->mc, base); rdev->mc.gtt_base_align = rdev->mc.gtt_size - 1; diff --git a/drivers/gpu/drm/radeon/rs690d.h b/drivers/gpu/drm/radeon/rs690d.h index 36e6398a98ae..8af3ccf20cc0 100644 --- a/drivers/gpu/drm/radeon/rs690d.h +++ b/drivers/gpu/drm/radeon/rs690d.h @@ -29,6 +29,9 @@ #define __RS690D_H__ /* Registers */ +#define R_00001E_K8_FB_LOCATION 0x00001E +#define R_00005F_MC_MISC_UMA_CNTL 0x00005F +#define G_00005F_K8_ADDR_EXT(x) (((x) >> 0) & 0xFF) #define R_000078_MC_INDEX 0x000078 #define S_000078_MC_IND_ADDR(x) (((x) & 0x1FF) << 0) #define G_000078_MC_IND_ADDR(x) (((x) >> 0) & 0x1FF) diff --git a/include/uapi/drm/radeon_drm.h b/include/uapi/drm/radeon_drm.h index eeda91774c8a..6fd25563f301 100644 --- a/include/uapi/drm/radeon_drm.h +++ b/include/uapi/drm/radeon_drm.h @@ -972,6 +972,9 @@ struct drm_radeon_cs { #define RADEON_INFO_MAX_SE 0x12 /* max SH per SE */ #define RADEON_INFO_MAX_SH_PER_SE 0x13 +/* fast fb access is enabled */ +#define RADEON_INFO_FASTFB_WORKING 0x14 + struct drm_radeon_info { uint32_t request; -- 2.20.1