From: Ben Widawsky Date: Tue, 5 Nov 2013 06:29:36 +0000 (-0800) Subject: drm/i915/bdw: Implement PPGTT enable X-Git-Tag: v3.13-rc1~69^2~8^2~48 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=94e409c1449858b893c55d22f4e9ea9e845a91ed;p=platform%2Fkernel%2Flinux-exynos.git drm/i915/bdw: Implement PPGTT enable Legacy PPGTT on GEN8 requires programming 4 PDP registers per ring. Since all rings are using the same address space with the current code the logic is simply to program all the tables we've setup for the PPGTT. v2: Turn on PPGTT in GFX_MODE v3: v2 was the wrong patch v4: Resolve conflicts due to patch series reordering. v5: Squash in fixup from Ben: Use LRI to write PDPs The docs (and simulator seems to back up) suggest that we can only program legacy PPGTT PDPs with LRI commands. v6: Rebase around context differences conflicts. v7: Use #defines for per ring PDPs. (Damien) v8: Don't use typede'f private_t. Signed-off-by: Ben Widawsky (up to v3 and v7) Reviewed-by: Imre Deak Reviewed-by: Damien Lespiau Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 39bfaf2..60f3981 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -195,6 +195,55 @@ static gen6_gtt_pte_t iris_pte_encode(dma_addr_t addr, return pte; } +/* Broadwell Page Directory Pointer Descriptors */ +static int gen8_write_pdp(struct intel_ring_buffer *ring, unsigned entry, + uint64_t val) +{ + int ret; + + BUG_ON(entry >= 4); + + ret = intel_ring_begin(ring, 6); + if (ret) + return ret; + + intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1)); + intel_ring_emit(ring, GEN8_RING_PDP_UDW(ring, entry)); + intel_ring_emit(ring, (u32)(val >> 32)); + intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1)); + intel_ring_emit(ring, GEN8_RING_PDP_LDW(ring, entry)); + intel_ring_emit(ring, (u32)(val)); + intel_ring_advance(ring); + + return 0; +} + +static int gen8_ppgtt_enable(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_ring_buffer *ring; + struct i915_hw_ppgtt *ppgtt = dev_priv->mm.aliasing_ppgtt; + int i, j, ret; + + /* bit of a hack to find the actual last used pd */ + int used_pd = ppgtt->num_pd_entries / GEN8_PDES_PER_PAGE; + + for_each_ring(ring, dev_priv, j) { + I915_WRITE(RING_MODE_GEN7(ring), + _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE)); + } + + for (i = used_pd - 1; i >= 0; i--) { + dma_addr_t addr = ppgtt->pd_dma_addr[i]; + for_each_ring(ring, dev_priv, j) { + ret = gen8_write_pdp(ring, i, addr); + if (ret) + return ret; + } + } + return 0; +} + static void gen8_ppgtt_clear_range(struct i915_address_space *vm, unsigned first_entry, unsigned num_entries, @@ -326,6 +375,7 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt, uint64_t size) ppgtt->num_pd_pages = 1 << get_order(max_pdp << PAGE_SHIFT); ppgtt->num_pt_pages = 1 << get_order(num_pt_pages << PAGE_SHIFT); ppgtt->num_pd_entries = max_pdp * GEN8_PDES_PER_PAGE; + ppgtt->enable = gen8_ppgtt_enable; ppgtt->base.clear_range = gen8_ppgtt_clear_range; ppgtt->base.insert_entries = gen8_ppgtt_insert_entries; ppgtt->base.cleanup = gen8_ppgtt_cleanup; diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 132b5d0..d186c77 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -110,6 +110,9 @@ #define RING_PP_DIR_DCLV(ring) ((ring)->mmio_base+0x220) #define PP_DIR_DCLV_2G 0xffffffff +#define GEN8_RING_PDP_UDW(ring, n) ((ring)->mmio_base+0x270 + ((n) * 8 + 4)) +#define GEN8_RING_PDP_LDW(ring, n) ((ring)->mmio_base+0x270 + (n) * 8) + #define GAM_ECOCHK 0x4090 #define ECOCHK_SNB_BIT (1<<10) #define HSW_ECOCHK_ARB_PRIO_SOL (1<<6)