From 0f0105b98fe2e05862c62ea02fe7643b0e902982 Mon Sep 17 00:00:00 2001 From: Mika Kuoppala Date: Sat, 25 Apr 2020 02:06:32 +0300 Subject: [PATCH] drm/i915: Use indirect ctx bb to mend CMD_BUF_CCTL Use indirect ctx bb to load cmd buffer control value from context image to avoid corruption. v2: add to lrc layout (Chris) v3: end to a cacheline (Chris) v4: add to lrc fixed (Chris) v5: value in offset+1 Testcase: igt/i915_selftest/gt_lrc Signed-off-by: Mika Kuoppala Acked-by: Chris Wilson Signed-off-by: Chris Wilson Link: https://patchwork.freedesktop.org/patch/msgid/20200424230632.30333-1-mika.kuoppala@linux.intel.com --- drivers/gpu/drm/i915/gt/intel_lrc.c | 112 ++++++++++++++++++++++++- drivers/gpu/drm/i915/gt/selftest_lrc.c | 5 ++ drivers/gpu/drm/i915/i915_reg.h | 1 + 3 files changed, 115 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c index a2fc4ad06debc..c8014c265ffb8 100644 --- a/drivers/gpu/drm/i915/gt/intel_lrc.c +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c @@ -294,6 +294,19 @@ static int lrc_ring_indirect_offset(const struct intel_engine_cs *engine) return x + 2; } +static int lrc_ring_cmd_buf_cctl(const struct intel_engine_cs *engine) +{ + if (engine->class != RENDER_CLASS) + return -1; + + if (INTEL_GEN(engine->i915) >= 12) + return 0xb6; + else if (INTEL_GEN(engine->i915) >= 11) + return 0xaa; + else + return -1; +} + static u32 lrc_ring_indirect_offset_default(const struct intel_engine_cs *engine) { @@ -607,7 +620,7 @@ static void set_offsets(u32 *regs, #define REG16(x) \ (((x) >> 9) | BIT(7) | BUILD_BUG_ON_ZERO(x >= 0x10000)), \ (((x) >> 2) & 0x7f) -#define END(x) 0, (x) +#define END(total_state_size) 0, (total_state_size) { const u32 base = engine->mmio_base; @@ -1015,8 +1028,63 @@ static const u8 gen12_rcs_offsets[] = { NOP(6), LRI(1, 0), REG(0x0c8), + NOP(3 + 9 + 1), + + LRI(51, POSTED), + REG16(0x588), + REG16(0x588), + REG16(0x588), + REG16(0x588), + REG16(0x588), + REG16(0x588), + REG(0x028), + REG(0x09c), + REG(0x0c0), + REG(0x178), + REG(0x17c), + REG16(0x358), + REG(0x170), + REG(0x150), + REG(0x154), + REG(0x158), + REG16(0x41c), + REG16(0x600), + REG16(0x604), + REG16(0x608), + REG16(0x60c), + REG16(0x610), + REG16(0x614), + REG16(0x618), + REG16(0x61c), + REG16(0x620), + REG16(0x624), + REG16(0x628), + REG16(0x62c), + REG16(0x630), + REG16(0x634), + REG16(0x638), + REG16(0x63c), + REG16(0x640), + REG16(0x644), + REG16(0x648), + REG16(0x64c), + REG16(0x650), + REG16(0x654), + REG16(0x658), + REG16(0x65c), + REG16(0x660), + REG16(0x664), + REG16(0x668), + REG16(0x66c), + REG16(0x670), + REG16(0x674), + REG16(0x678), + REG16(0x67c), + REG(0x068), + REG(0x084), + NOP(1), - END(80) + END(192) }; #undef END @@ -3246,6 +3314,38 @@ gen12_emit_restore_scratch(const struct intel_context *ce, u32 *cs) return cs; } +static u32 * +gen12_emit_cmd_buf_wa(const struct intel_context *ce, u32 *cs) +{ + GEM_BUG_ON(lrc_ring_cmd_buf_cctl(ce->engine) == -1); + + *cs++ = MI_LOAD_REGISTER_MEM_GEN8 | + MI_SRM_LRM_GLOBAL_GTT | + MI_LRI_LRM_CS_MMIO; + *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0)); + *cs++ = i915_ggtt_offset(ce->state) + LRC_STATE_OFFSET + + (lrc_ring_cmd_buf_cctl(ce->engine) + 1) * sizeof(u32); + *cs++ = 0; + + *cs++ = MI_LOAD_REGISTER_REG | + MI_LRR_SOURCE_CS_MMIO | + MI_LRI_LRM_CS_MMIO; + *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0)); + *cs++ = i915_mmio_reg_offset(RING_CMD_BUF_CCTL(0)); + + return cs; +} + +static u32 * +gen12_emit_indirect_ctx_rcs(const struct intel_context *ce, u32 *cs) +{ + cs = gen12_emit_timestamp_wa(ce, cs); + cs = gen12_emit_cmd_buf_wa(ce, cs); + cs = gen12_emit_restore_scratch(ce, cs); + + return cs; +} + static u32 * gen12_emit_indirect_ctx_xcs(const struct intel_context *ce, u32 *cs) { @@ -3317,9 +3417,15 @@ __execlists_update_reg_state(const struct intel_context *ce, } if (ce->wa_bb_page) { + u32 *(*fn)(const struct intel_context *ce, u32 *cs); + + fn = gen12_emit_indirect_ctx_xcs; + if (ce->engine->class == RENDER_CLASS) + fn = gen12_emit_indirect_ctx_rcs; + /* Mutually exclusive wrt to global indirect bb */ GEM_BUG_ON(engine->wa_ctx.indirect_ctx.size); - setup_indirect_ctx_bb(ce, engine, gen12_emit_indirect_ctx_xcs); + setup_indirect_ctx_bb(ce, engine, fn); } } diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c index d47dcd754f654..d3fa91aed7dee 100644 --- a/drivers/gpu/drm/i915/gt/selftest_lrc.c +++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c @@ -4618,6 +4618,11 @@ static int live_lrc_fixed(void *arg) lrc_ring_gpr0(engine), "RING_CS_GPR0" }, + { + i915_mmio_reg_offset(RING_CMD_BUF_CCTL(engine->mmio_base)), + lrc_ring_cmd_buf_cctl(engine), + "RING_CMD_BUF_CCTL" + }, { }, }, *t; u32 *hw; diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 981b52aa5ed84..96d9f8853343b 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -2657,6 +2657,7 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg) #define RING_DMA_FADD_UDW(base) _MMIO((base) + 0x60) /* gen8+ */ #define RING_INSTPM(base) _MMIO((base) + 0xc0) #define RING_MI_MODE(base) _MMIO((base) + 0x9c) +#define RING_CMD_BUF_CCTL(base) _MMIO((base) + 0x84) #define INSTPS _MMIO(0x2070) /* 965+ only */ #define GEN4_INSTDONE1 _MMIO(0x207c) /* 965+ only, aka INSTDONE_2 on SNB */ #define ACTHD_I965 _MMIO(0x2074) -- 2.39.5