| /* |
| * Copyright © 2008-2010 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| * IN THE SOFTWARE. |
| * |
| * Authors: |
| * Eric Anholt <eric@anholt.net> |
| * Zou Nan hai <nanhai.zou@intel.com> |
| * Xiang Hai hao<haihao.xiang@intel.com> |
| * |
| */ |
| |
| #include <linux/log2.h> |
| #include <drm/drmP.h> |
| #include "i915_drv.h" |
| #include <drm/i915_drm.h> |
| #include "i915_trace.h" |
| #include "intel_drv.h" |
| |
| /* Rough estimate of the typical request size, performing a flush, |
| * set-context and then emitting the batch. |
| */ |
| #define LEGACY_REQUEST_SIZE 200 |
| |
| int __intel_ring_space(int head, int tail, int size) |
| { |
| int space = head - tail; |
| if (space <= 0) |
| space += size; |
| return space - I915_RING_FREE_SPACE; |
| } |
| |
| void intel_ring_update_space(struct intel_ringbuffer *ringbuf) |
| { |
| if (ringbuf->last_retired_head != -1) { |
| ringbuf->head = ringbuf->last_retired_head; |
| ringbuf->last_retired_head = -1; |
| } |
| |
| ringbuf->space = __intel_ring_space(ringbuf->head & HEAD_ADDR, |
| ringbuf->tail, ringbuf->size); |
| } |
| |
| bool intel_engine_stopped(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| return dev_priv->gpu_error.stop_rings & intel_engine_flag(engine); |
| } |
| |
| static void __intel_ring_advance(struct intel_engine_cs *engine) |
| { |
| struct intel_ringbuffer *ringbuf = engine->buffer; |
| ringbuf->tail &= ringbuf->size - 1; |
| if (intel_engine_stopped(engine)) |
| return; |
| engine->write_tail(engine, ringbuf->tail); |
| } |
| |
| static int |
| gen2_render_ring_flush(struct drm_i915_gem_request *req, |
| u32 invalidate_domains, |
| u32 flush_domains) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| u32 cmd; |
| int ret; |
| |
| cmd = MI_FLUSH; |
| if (((invalidate_domains|flush_domains) & I915_GEM_DOMAIN_RENDER) == 0) |
| cmd |= MI_NO_WRITE_FLUSH; |
| |
| if (invalidate_domains & I915_GEM_DOMAIN_SAMPLER) |
| cmd |= MI_READ_FLUSH; |
| |
| ret = intel_ring_begin(req, 2); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, cmd); |
| intel_ring_emit(engine, MI_NOOP); |
| intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| static int |
| gen4_render_ring_flush(struct drm_i915_gem_request *req, |
| u32 invalidate_domains, |
| u32 flush_domains) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| u32 cmd; |
| int ret; |
| |
| /* |
| * read/write caches: |
| * |
| * I915_GEM_DOMAIN_RENDER is always invalidated, but is |
| * only flushed if MI_NO_WRITE_FLUSH is unset. On 965, it is |
| * also flushed at 2d versus 3d pipeline switches. |
| * |
| * read-only caches: |
| * |
| * I915_GEM_DOMAIN_SAMPLER is flushed on pre-965 if |
| * MI_READ_FLUSH is set, and is always flushed on 965. |
| * |
| * I915_GEM_DOMAIN_COMMAND may not exist? |
| * |
| * I915_GEM_DOMAIN_INSTRUCTION, which exists on 965, is |
| * invalidated when MI_EXE_FLUSH is set. |
| * |
| * I915_GEM_DOMAIN_VERTEX, which exists on 965, is |
| * invalidated with every MI_FLUSH. |
| * |
| * TLBs: |
| * |
| * On 965, TLBs associated with I915_GEM_DOMAIN_COMMAND |
| * and I915_GEM_DOMAIN_CPU in are invalidated at PTE write and |
| * I915_GEM_DOMAIN_RENDER and I915_GEM_DOMAIN_SAMPLER |
| * are flushed at any MI_FLUSH. |
| */ |
| |
| cmd = MI_FLUSH | MI_NO_WRITE_FLUSH; |
| if ((invalidate_domains|flush_domains) & I915_GEM_DOMAIN_RENDER) |
| cmd &= ~MI_NO_WRITE_FLUSH; |
| if (invalidate_domains & I915_GEM_DOMAIN_INSTRUCTION) |
| cmd |= MI_EXE_FLUSH; |
| |
| if (invalidate_domains & I915_GEM_DOMAIN_COMMAND && |
| (IS_G4X(req->i915) || IS_GEN5(req->i915))) |
| cmd |= MI_INVALIDATE_ISP; |
| |
| ret = intel_ring_begin(req, 2); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, cmd); |
| intel_ring_emit(engine, MI_NOOP); |
| intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| /** |
| * Emits a PIPE_CONTROL with a non-zero post-sync operation, for |
| * implementing two workarounds on gen6. From section 1.4.7.1 |
| * "PIPE_CONTROL" of the Sandy Bridge PRM volume 2 part 1: |
| * |
| * [DevSNB-C+{W/A}] Before any depth stall flush (including those |
| * produced by non-pipelined state commands), software needs to first |
| * send a PIPE_CONTROL with no bits set except Post-Sync Operation != |
| * 0. |
| * |
| * [Dev-SNB{W/A}]: Before a PIPE_CONTROL with Write Cache Flush Enable |
| * =1, a PIPE_CONTROL with any non-zero post-sync-op is required. |
| * |
| * And the workaround for these two requires this workaround first: |
| * |
| * [Dev-SNB{W/A}]: Pipe-control with CS-stall bit set must be sent |
| * BEFORE the pipe-control with a post-sync op and no write-cache |
| * flushes. |
| * |
| * And this last workaround is tricky because of the requirements on |
| * that bit. From section 1.4.7.2.3 "Stall" of the Sandy Bridge PRM |
| * volume 2 part 1: |
| * |
| * "1 of the following must also be set: |
| * - Render Target Cache Flush Enable ([12] of DW1) |
| * - Depth Cache Flush Enable ([0] of DW1) |
| * - Stall at Pixel Scoreboard ([1] of DW1) |
| * - Depth Stall ([13] of DW1) |
| * - Post-Sync Operation ([13] of DW1) |
| * - Notify Enable ([8] of DW1)" |
| * |
| * The cache flushes require the workaround flush that triggered this |
| * one, so we can't use it. Depth stall would trigger the same. |
| * Post-sync nonzero is what triggered this second workaround, so we |
| * can't use that one either. Notify enable is IRQs, which aren't |
| * really our business. That leaves only stall at scoreboard. |
| */ |
| static int |
| intel_emit_post_sync_nonzero_flush(struct drm_i915_gem_request *req) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| u32 scratch_addr = engine->scratch.gtt_offset + 2 * CACHELINE_BYTES; |
| int ret; |
| |
| ret = intel_ring_begin(req, 6); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, GFX_OP_PIPE_CONTROL(5)); |
| intel_ring_emit(engine, PIPE_CONTROL_CS_STALL | |
| PIPE_CONTROL_STALL_AT_SCOREBOARD); |
| intel_ring_emit(engine, scratch_addr | PIPE_CONTROL_GLOBAL_GTT); /* address */ |
| intel_ring_emit(engine, 0); /* low dword */ |
| intel_ring_emit(engine, 0); /* high dword */ |
| intel_ring_emit(engine, MI_NOOP); |
| intel_ring_advance(engine); |
| |
| ret = intel_ring_begin(req, 6); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, GFX_OP_PIPE_CONTROL(5)); |
| intel_ring_emit(engine, PIPE_CONTROL_QW_WRITE); |
| intel_ring_emit(engine, scratch_addr | PIPE_CONTROL_GLOBAL_GTT); /* address */ |
| intel_ring_emit(engine, 0); |
| intel_ring_emit(engine, 0); |
| intel_ring_emit(engine, MI_NOOP); |
| intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| static int |
| gen6_render_ring_flush(struct drm_i915_gem_request *req, |
| u32 invalidate_domains, u32 flush_domains) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| u32 flags = 0; |
| u32 scratch_addr = engine->scratch.gtt_offset + 2 * CACHELINE_BYTES; |
| int ret; |
| |
| /* Force SNB workarounds for PIPE_CONTROL flushes */ |
| ret = intel_emit_post_sync_nonzero_flush(req); |
| if (ret) |
| return ret; |
| |
| /* Just flush everything. Experiments have shown that reducing the |
| * number of bits based on the write domains has little performance |
| * impact. |
| */ |
| if (flush_domains) { |
| flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH; |
| flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH; |
| /* |
| * Ensure that any following seqno writes only happen |
| * when the render cache is indeed flushed. |
| */ |
| flags |= PIPE_CONTROL_CS_STALL; |
| } |
| if (invalidate_domains) { |
| flags |= PIPE_CONTROL_TLB_INVALIDATE; |
| flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE; |
| flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE; |
| flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE; |
| flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE; |
| flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE; |
| /* |
| * TLB invalidate requires a post-sync write. |
| */ |
| flags |= PIPE_CONTROL_QW_WRITE | PIPE_CONTROL_CS_STALL; |
| } |
| |
| ret = intel_ring_begin(req, 4); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, GFX_OP_PIPE_CONTROL(4)); |
| intel_ring_emit(engine, flags); |
| intel_ring_emit(engine, scratch_addr | PIPE_CONTROL_GLOBAL_GTT); |
| intel_ring_emit(engine, 0); |
| intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| static int |
| gen7_render_ring_cs_stall_wa(struct drm_i915_gem_request *req) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| int ret; |
| |
| ret = intel_ring_begin(req, 4); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, GFX_OP_PIPE_CONTROL(4)); |
| intel_ring_emit(engine, PIPE_CONTROL_CS_STALL | |
| PIPE_CONTROL_STALL_AT_SCOREBOARD); |
| intel_ring_emit(engine, 0); |
| intel_ring_emit(engine, 0); |
| intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| static int |
| gen7_render_ring_flush(struct drm_i915_gem_request *req, |
| u32 invalidate_domains, u32 flush_domains) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| u32 flags = 0; |
| u32 scratch_addr = engine->scratch.gtt_offset + 2 * CACHELINE_BYTES; |
| int ret; |
| |
| /* |
| * Ensure that any following seqno writes only happen when the render |
| * cache is indeed flushed. |
| * |
| * Workaround: 4th PIPE_CONTROL command (except the ones with only |
| * read-cache invalidate bits set) must have the CS_STALL bit set. We |
| * don't try to be clever and just set it unconditionally. |
| */ |
| flags |= PIPE_CONTROL_CS_STALL; |
| |
| /* Just flush everything. Experiments have shown that reducing the |
| * number of bits based on the write domains has little performance |
| * impact. |
| */ |
| if (flush_domains) { |
| flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH; |
| flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH; |
| flags |= PIPE_CONTROL_DC_FLUSH_ENABLE; |
| flags |= PIPE_CONTROL_FLUSH_ENABLE; |
| } |
| if (invalidate_domains) { |
| flags |= PIPE_CONTROL_TLB_INVALIDATE; |
| flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE; |
| flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE; |
| flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE; |
| flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE; |
| flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE; |
| flags |= PIPE_CONTROL_MEDIA_STATE_CLEAR; |
| /* |
| * TLB invalidate requires a post-sync write. |
| */ |
| flags |= PIPE_CONTROL_QW_WRITE; |
| flags |= PIPE_CONTROL_GLOBAL_GTT_IVB; |
| |
| flags |= PIPE_CONTROL_STALL_AT_SCOREBOARD; |
| |
| /* Workaround: we must issue a pipe_control with CS-stall bit |
| * set before a pipe_control command that has the state cache |
| * invalidate bit set. */ |
| gen7_render_ring_cs_stall_wa(req); |
| } |
| |
| ret = intel_ring_begin(req, 4); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, GFX_OP_PIPE_CONTROL(4)); |
| intel_ring_emit(engine, flags); |
| intel_ring_emit(engine, scratch_addr); |
| intel_ring_emit(engine, 0); |
| intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| static int |
| gen8_emit_pipe_control(struct drm_i915_gem_request *req, |
| u32 flags, u32 scratch_addr) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| int ret; |
| |
| ret = intel_ring_begin(req, 6); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, GFX_OP_PIPE_CONTROL(6)); |
| intel_ring_emit(engine, flags); |
| intel_ring_emit(engine, scratch_addr); |
| intel_ring_emit(engine, 0); |
| intel_ring_emit(engine, 0); |
| intel_ring_emit(engine, 0); |
| intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| static int |
| gen8_render_ring_flush(struct drm_i915_gem_request *req, |
| u32 invalidate_domains, u32 flush_domains) |
| { |
| u32 flags = 0; |
| u32 scratch_addr = req->engine->scratch.gtt_offset + 2 * CACHELINE_BYTES; |
| int ret; |
| |
| flags |= PIPE_CONTROL_CS_STALL; |
| |
| if (flush_domains) { |
| flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH; |
| flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH; |
| flags |= PIPE_CONTROL_DC_FLUSH_ENABLE; |
| flags |= PIPE_CONTROL_FLUSH_ENABLE; |
| } |
| if (invalidate_domains) { |
| flags |= PIPE_CONTROL_TLB_INVALIDATE; |
| flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE; |
| flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE; |
| flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE; |
| flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE; |
| flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE; |
| flags |= PIPE_CONTROL_QW_WRITE; |
| flags |= PIPE_CONTROL_GLOBAL_GTT_IVB; |
| |
| /* WaCsStallBeforeStateCacheInvalidate:bdw,chv */ |
| ret = gen8_emit_pipe_control(req, |
| PIPE_CONTROL_CS_STALL | |
| PIPE_CONTROL_STALL_AT_SCOREBOARD, |
| 0); |
| if (ret) |
| return ret; |
| } |
| |
| return gen8_emit_pipe_control(req, flags, scratch_addr); |
| } |
| |
| static void ring_write_tail(struct intel_engine_cs *engine, |
| u32 value) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| I915_WRITE_TAIL(engine, value); |
| } |
| |
| u64 intel_ring_get_active_head(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| u64 acthd; |
| |
| if (INTEL_GEN(dev_priv) >= 8) |
| acthd = I915_READ64_2x32(RING_ACTHD(engine->mmio_base), |
| RING_ACTHD_UDW(engine->mmio_base)); |
| else if (INTEL_GEN(dev_priv) >= 4) |
| acthd = I915_READ(RING_ACTHD(engine->mmio_base)); |
| else |
| acthd = I915_READ(ACTHD); |
| |
| return acthd; |
| } |
| |
| static void ring_setup_phys_status_page(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| u32 addr; |
| |
| addr = dev_priv->status_page_dmah->busaddr; |
| if (INTEL_GEN(dev_priv) >= 4) |
| addr |= (dev_priv->status_page_dmah->busaddr >> 28) & 0xf0; |
| I915_WRITE(HWS_PGA, addr); |
| } |
| |
| static void intel_ring_setup_status_page(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| i915_reg_t mmio; |
| |
| /* The ring status page addresses are no longer next to the rest of |
| * the ring registers as of gen7. |
| */ |
| if (IS_GEN7(dev_priv)) { |
| switch (engine->id) { |
| case RCS: |
| mmio = RENDER_HWS_PGA_GEN7; |
| break; |
| case BCS: |
| mmio = BLT_HWS_PGA_GEN7; |
| break; |
| /* |
| * VCS2 actually doesn't exist on Gen7. Only shut up |
| * gcc switch check warning |
| */ |
| case VCS2: |
| case VCS: |
| mmio = BSD_HWS_PGA_GEN7; |
| break; |
| case VECS: |
| mmio = VEBOX_HWS_PGA_GEN7; |
| break; |
| } |
| } else if (IS_GEN6(dev_priv)) { |
| mmio = RING_HWS_PGA_GEN6(engine->mmio_base); |
| } else { |
| /* XXX: gen8 returns to sanity */ |
| mmio = RING_HWS_PGA(engine->mmio_base); |
| } |
| |
| I915_WRITE(mmio, (u32)engine->status_page.gfx_addr); |
| POSTING_READ(mmio); |
| |
| /* |
| * Flush the TLB for this page |
| * |
| * FIXME: These two bits have disappeared on gen8, so a question |
| * arises: do we still need this and if so how should we go about |
| * invalidating the TLB? |
| */ |
| if (IS_GEN(dev_priv, 6, 7)) { |
| i915_reg_t reg = RING_INSTPM(engine->mmio_base); |
| |
| /* ring should be idle before issuing a sync flush*/ |
| WARN_ON((I915_READ_MODE(engine) & MODE_IDLE) == 0); |
| |
| I915_WRITE(reg, |
| _MASKED_BIT_ENABLE(INSTPM_TLB_INVALIDATE | |
| INSTPM_SYNC_FLUSH)); |
| if (intel_wait_for_register(dev_priv, |
| reg, INSTPM_SYNC_FLUSH, 0, |
| 1000)) |
| DRM_ERROR("%s: wait for SyncFlush to complete for TLB invalidation timed out\n", |
| engine->name); |
| } |
| } |
| |
| static bool stop_ring(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| if (!IS_GEN2(dev_priv)) { |
| I915_WRITE_MODE(engine, _MASKED_BIT_ENABLE(STOP_RING)); |
| if (intel_wait_for_register(dev_priv, |
| RING_MI_MODE(engine->mmio_base), |
| MODE_IDLE, |
| MODE_IDLE, |
| 1000)) { |
| DRM_ERROR("%s : timed out trying to stop ring\n", |
| engine->name); |
| /* Sometimes we observe that the idle flag is not |
| * set even though the ring is empty. So double |
| * check before giving up. |
| */ |
| if (I915_READ_HEAD(engine) != I915_READ_TAIL(engine)) |
| return false; |
| } |
| } |
| |
| I915_WRITE_CTL(engine, 0); |
| I915_WRITE_HEAD(engine, 0); |
| engine->write_tail(engine, 0); |
| |
| if (!IS_GEN2(dev_priv)) { |
| (void)I915_READ_CTL(engine); |
| I915_WRITE_MODE(engine, _MASKED_BIT_DISABLE(STOP_RING)); |
| } |
| |
| return (I915_READ_HEAD(engine) & HEAD_ADDR) == 0; |
| } |
| |
| void intel_engine_init_hangcheck(struct intel_engine_cs *engine) |
| { |
| memset(&engine->hangcheck, 0, sizeof(engine->hangcheck)); |
| } |
| |
| static int init_ring_common(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| struct intel_ringbuffer *ringbuf = engine->buffer; |
| struct drm_i915_gem_object *obj = ringbuf->obj; |
| int ret = 0; |
| |
| intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL); |
| |
| if (!stop_ring(engine)) { |
| /* G45 ring initialization often fails to reset head to zero */ |
| DRM_DEBUG_KMS("%s head not reset to zero " |
| "ctl %08x head %08x tail %08x start %08x\n", |
| engine->name, |
| I915_READ_CTL(engine), |
| I915_READ_HEAD(engine), |
| I915_READ_TAIL(engine), |
| I915_READ_START(engine)); |
| |
| if (!stop_ring(engine)) { |
| DRM_ERROR("failed to set %s head to zero " |
| "ctl %08x head %08x tail %08x start %08x\n", |
| engine->name, |
| I915_READ_CTL(engine), |
| I915_READ_HEAD(engine), |
| I915_READ_TAIL(engine), |
| I915_READ_START(engine)); |
| ret = -EIO; |
| goto out; |
| } |
| } |
| |
| if (I915_NEED_GFX_HWS(dev_priv)) |
| intel_ring_setup_status_page(engine); |
| else |
| ring_setup_phys_status_page(engine); |
| |
| /* Enforce ordering by reading HEAD register back */ |
| I915_READ_HEAD(engine); |
| |
| /* Initialize the ring. This must happen _after_ we've cleared the ring |
| * registers with the above sequence (the readback of the HEAD registers |
| * also enforces ordering), otherwise the hw might lose the new ring |
| * register values. */ |
| I915_WRITE_START(engine, i915_gem_obj_ggtt_offset(obj)); |
| |
| /* WaClearRingBufHeadRegAtInit:ctg,elk */ |
| if (I915_READ_HEAD(engine)) |
| DRM_DEBUG("%s initialization failed [head=%08x], fudging\n", |
| engine->name, I915_READ_HEAD(engine)); |
| I915_WRITE_HEAD(engine, 0); |
| (void)I915_READ_HEAD(engine); |
| |
| I915_WRITE_CTL(engine, |
| ((ringbuf->size - PAGE_SIZE) & RING_NR_PAGES) |
| | RING_VALID); |
| |
| /* If the head is still not zero, the ring is dead */ |
| if (wait_for((I915_READ_CTL(engine) & RING_VALID) != 0 && |
| I915_READ_START(engine) == i915_gem_obj_ggtt_offset(obj) && |
| (I915_READ_HEAD(engine) & HEAD_ADDR) == 0, 50)) { |
| DRM_ERROR("%s initialization failed " |
| "ctl %08x (valid? %d) head %08x tail %08x start %08x [expected %08lx]\n", |
| engine->name, |
| I915_READ_CTL(engine), |
| I915_READ_CTL(engine) & RING_VALID, |
| I915_READ_HEAD(engine), I915_READ_TAIL(engine), |
| I915_READ_START(engine), |
| (unsigned long)i915_gem_obj_ggtt_offset(obj)); |
| ret = -EIO; |
| goto out; |
| } |
| |
| ringbuf->last_retired_head = -1; |
| ringbuf->head = I915_READ_HEAD(engine); |
| ringbuf->tail = I915_READ_TAIL(engine) & TAIL_ADDR; |
| intel_ring_update_space(ringbuf); |
| |
| intel_engine_init_hangcheck(engine); |
| |
| out: |
| intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); |
| |
| return ret; |
| } |
| |
| void |
| intel_fini_pipe_control(struct intel_engine_cs *engine) |
| { |
| if (engine->scratch.obj == NULL) |
| return; |
| |
| if (INTEL_GEN(engine->i915) >= 5) { |
| kunmap(sg_page(engine->scratch.obj->pages->sgl)); |
| i915_gem_object_ggtt_unpin(engine->scratch.obj); |
| } |
| |
| drm_gem_object_unreference(&engine->scratch.obj->base); |
| engine->scratch.obj = NULL; |
| } |
| |
| int |
| intel_init_pipe_control(struct intel_engine_cs *engine) |
| { |
| int ret; |
| |
| WARN_ON(engine->scratch.obj); |
| |
| engine->scratch.obj = i915_gem_object_create(engine->i915->dev, 4096); |
| if (IS_ERR(engine->scratch.obj)) { |
| DRM_ERROR("Failed to allocate seqno page\n"); |
| ret = PTR_ERR(engine->scratch.obj); |
| engine->scratch.obj = NULL; |
| goto err; |
| } |
| |
| ret = i915_gem_object_set_cache_level(engine->scratch.obj, |
| I915_CACHE_LLC); |
| if (ret) |
| goto err_unref; |
| |
| ret = i915_gem_obj_ggtt_pin(engine->scratch.obj, 4096, 0); |
| if (ret) |
| goto err_unref; |
| |
| engine->scratch.gtt_offset = i915_gem_obj_ggtt_offset(engine->scratch.obj); |
| engine->scratch.cpu_page = kmap(sg_page(engine->scratch.obj->pages->sgl)); |
| if (engine->scratch.cpu_page == NULL) { |
| ret = -ENOMEM; |
| goto err_unpin; |
| } |
| |
| DRM_DEBUG_DRIVER("%s pipe control offset: 0x%08x\n", |
| engine->name, engine->scratch.gtt_offset); |
| return 0; |
| |
| err_unpin: |
| i915_gem_object_ggtt_unpin(engine->scratch.obj); |
| err_unref: |
| drm_gem_object_unreference(&engine->scratch.obj->base); |
| err: |
| return ret; |
| } |
| |
| static int intel_ring_workarounds_emit(struct drm_i915_gem_request *req) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| struct i915_workarounds *w = &req->i915->workarounds; |
| int ret, i; |
| |
| if (w->count == 0) |
| return 0; |
| |
| engine->gpu_caches_dirty = true; |
| ret = intel_ring_flush_all_caches(req); |
| if (ret) |
| return ret; |
| |
| ret = intel_ring_begin(req, (w->count * 2 + 2)); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, MI_LOAD_REGISTER_IMM(w->count)); |
| for (i = 0; i < w->count; i++) { |
| intel_ring_emit_reg(engine, w->reg[i].addr); |
| intel_ring_emit(engine, w->reg[i].value); |
| } |
| intel_ring_emit(engine, MI_NOOP); |
| |
| intel_ring_advance(engine); |
| |
| engine->gpu_caches_dirty = true; |
| ret = intel_ring_flush_all_caches(req); |
| if (ret) |
| return ret; |
| |
| DRM_DEBUG_DRIVER("Number of Workarounds emitted: %d\n", w->count); |
| |
| return 0; |
| } |
| |
| static int intel_rcs_ctx_init(struct drm_i915_gem_request *req) |
| { |
| int ret; |
| |
| ret = intel_ring_workarounds_emit(req); |
| if (ret != 0) |
| return ret; |
| |
| ret = i915_gem_render_state_init(req); |
| if (ret) |
| return ret; |
| |
| return 0; |
| } |
| |
| static int wa_add(struct drm_i915_private *dev_priv, |
| i915_reg_t addr, |
| const u32 mask, const u32 val) |
| { |
| const u32 idx = dev_priv->workarounds.count; |
| |
| if (WARN_ON(idx >= I915_MAX_WA_REGS)) |
| return -ENOSPC; |
| |
| dev_priv->workarounds.reg[idx].addr = addr; |
| dev_priv->workarounds.reg[idx].value = val; |
| dev_priv->workarounds.reg[idx].mask = mask; |
| |
| dev_priv->workarounds.count++; |
| |
| return 0; |
| } |
| |
| #define WA_REG(addr, mask, val) do { \ |
| const int r = wa_add(dev_priv, (addr), (mask), (val)); \ |
| if (r) \ |
| return r; \ |
| } while (0) |
| |
| #define WA_SET_BIT_MASKED(addr, mask) \ |
| WA_REG(addr, (mask), _MASKED_BIT_ENABLE(mask)) |
| |
| #define WA_CLR_BIT_MASKED(addr, mask) \ |
| WA_REG(addr, (mask), _MASKED_BIT_DISABLE(mask)) |
| |
| #define WA_SET_FIELD_MASKED(addr, mask, value) \ |
| WA_REG(addr, mask, _MASKED_FIELD(mask, value)) |
| |
| #define WA_SET_BIT(addr, mask) WA_REG(addr, mask, I915_READ(addr) | (mask)) |
| #define WA_CLR_BIT(addr, mask) WA_REG(addr, mask, I915_READ(addr) & ~(mask)) |
| |
| #define WA_WRITE(addr, val) WA_REG(addr, 0xffffffff, val) |
| |
| static int wa_ring_whitelist_reg(struct intel_engine_cs *engine, |
| i915_reg_t reg) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| struct i915_workarounds *wa = &dev_priv->workarounds; |
| const uint32_t index = wa->hw_whitelist_count[engine->id]; |
| |
| if (WARN_ON(index >= RING_MAX_NONPRIV_SLOTS)) |
| return -EINVAL; |
| |
| WA_WRITE(RING_FORCE_TO_NONPRIV(engine->mmio_base, index), |
| i915_mmio_reg_offset(reg)); |
| wa->hw_whitelist_count[engine->id]++; |
| |
| return 0; |
| } |
| |
| static int gen8_init_workarounds(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| WA_SET_BIT_MASKED(INSTPM, INSTPM_FORCE_ORDERING); |
| |
| /* WaDisableAsyncFlipPerfMode:bdw,chv */ |
| WA_SET_BIT_MASKED(MI_MODE, ASYNC_FLIP_PERF_DISABLE); |
| |
| /* WaDisablePartialInstShootdown:bdw,chv */ |
| WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, |
| PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE); |
| |
| /* Use Force Non-Coherent whenever executing a 3D context. This is a |
| * workaround for for a possible hang in the unlikely event a TLB |
| * invalidation occurs during a PSD flush. |
| */ |
| /* WaForceEnableNonCoherent:bdw,chv */ |
| /* WaHdcDisableFetchWhenMasked:bdw,chv */ |
| WA_SET_BIT_MASKED(HDC_CHICKEN0, |
| HDC_DONOT_FETCH_MEM_WHEN_MASKED | |
| HDC_FORCE_NON_COHERENT); |
| |
| /* From the Haswell PRM, Command Reference: Registers, CACHE_MODE_0: |
| * "The Hierarchical Z RAW Stall Optimization allows non-overlapping |
| * polygons in the same 8x4 pixel/sample area to be processed without |
| * stalling waiting for the earlier ones to write to Hierarchical Z |
| * buffer." |
| * |
| * This optimization is off by default for BDW and CHV; turn it on. |
| */ |
| WA_CLR_BIT_MASKED(CACHE_MODE_0_GEN7, HIZ_RAW_STALL_OPT_DISABLE); |
| |
| /* Wa4x4STCOptimizationDisable:bdw,chv */ |
| WA_SET_BIT_MASKED(CACHE_MODE_1, GEN8_4x4_STC_OPTIMIZATION_DISABLE); |
| |
| /* |
| * BSpec recommends 8x4 when MSAA is used, |
| * however in practice 16x4 seems fastest. |
| * |
| * Note that PS/WM thread counts depend on the WIZ hashing |
| * disable bit, which we don't touch here, but it's good |
| * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM). |
| */ |
| WA_SET_FIELD_MASKED(GEN7_GT_MODE, |
| GEN6_WIZ_HASHING_MASK, |
| GEN6_WIZ_HASHING_16x4); |
| |
| return 0; |
| } |
| |
| static int bdw_init_workarounds(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| int ret; |
| |
| ret = gen8_init_workarounds(engine); |
| if (ret) |
| return ret; |
| |
| /* WaDisableThreadStallDopClockGating:bdw (pre-production) */ |
| WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, STALL_DOP_GATING_DISABLE); |
| |
| /* WaDisableDopClockGating:bdw */ |
| WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2, |
| DOP_CLOCK_GATING_DISABLE); |
| |
| WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3, |
| GEN8_SAMPLER_POWER_BYPASS_DIS); |
| |
| WA_SET_BIT_MASKED(HDC_CHICKEN0, |
| /* WaForceContextSaveRestoreNonCoherent:bdw */ |
| HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT | |
| /* WaDisableFenceDestinationToSLM:bdw (pre-prod) */ |
| (IS_BDW_GT3(dev_priv) ? HDC_FENCE_DEST_SLM_DISABLE : 0)); |
| |
| return 0; |
| } |
| |
| static int chv_init_workarounds(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| int ret; |
| |
| ret = gen8_init_workarounds(engine); |
| if (ret) |
| return ret; |
| |
| /* WaDisableThreadStallDopClockGating:chv */ |
| WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, STALL_DOP_GATING_DISABLE); |
| |
| /* Improve HiZ throughput on CHV. */ |
| WA_SET_BIT_MASKED(HIZ_CHICKEN, CHV_HZ_8X8_MODE_IN_1X); |
| |
| return 0; |
| } |
| |
| static int gen9_init_workarounds(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| int ret; |
| |
| /* WaConextSwitchWithConcurrentTLBInvalidate:skl,bxt,kbl */ |
| I915_WRITE(GEN9_CSFE_CHICKEN1_RCS, _MASKED_BIT_ENABLE(GEN9_PREEMPT_GPGPU_SYNC_SWITCH_DISABLE)); |
| |
| /* WaEnableLbsSlaRetryTimerDecrement:skl,bxt,kbl */ |
| I915_WRITE(BDW_SCRATCH1, I915_READ(BDW_SCRATCH1) | |
| GEN9_LBS_SLA_RETRY_TIMER_DECREMENT_ENABLE); |
| |
| /* WaDisableKillLogic:bxt,skl,kbl */ |
| I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | |
| ECOCHK_DIS_TLB); |
| |
| /* WaClearFlowControlGpgpuContextSave:skl,bxt,kbl */ |
| /* WaDisablePartialInstShootdown:skl,bxt,kbl */ |
| WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, |
| FLOW_CONTROL_ENABLE | |
| PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE); |
| |
| /* Syncing dependencies between camera and graphics:skl,bxt,kbl */ |
| WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3, |
| GEN9_DISABLE_OCL_OOB_SUPPRESS_LOGIC); |
| |
| /* WaDisableDgMirrorFixInHalfSliceChicken5:skl,bxt */ |
| if (IS_SKL_REVID(dev_priv, 0, SKL_REVID_B0) || |
| IS_BXT_REVID(dev_priv, 0, BXT_REVID_A1)) |
| WA_CLR_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN5, |
| GEN9_DG_MIRROR_FIX_ENABLE); |
| |
| /* WaSetDisablePixMaskCammingAndRhwoInCommonSliceChicken:skl,bxt */ |
| if (IS_SKL_REVID(dev_priv, 0, SKL_REVID_B0) || |
| IS_BXT_REVID(dev_priv, 0, BXT_REVID_A1)) { |
| WA_SET_BIT_MASKED(GEN7_COMMON_SLICE_CHICKEN1, |
| GEN9_RHWO_OPTIMIZATION_DISABLE); |
| /* |
| * WA also requires GEN9_SLICE_COMMON_ECO_CHICKEN0[14:14] to be set |
| * but we do that in per ctx batchbuffer as there is an issue |
| * with this register not getting restored on ctx restore |
| */ |
| } |
| |
| /* WaEnableYV12BugFixInHalfSliceChicken7:skl,bxt,kbl */ |
| /* WaEnableSamplerGPGPUPreemptionSupport:skl,bxt,kbl */ |
| WA_SET_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN7, |
| GEN9_ENABLE_YV12_BUGFIX | |
| GEN9_ENABLE_GPGPU_PREEMPTION); |
| |
| /* Wa4x4STCOptimizationDisable:skl,bxt,kbl */ |
| /* WaDisablePartialResolveInVc:skl,bxt,kbl */ |
| WA_SET_BIT_MASKED(CACHE_MODE_1, (GEN8_4x4_STC_OPTIMIZATION_DISABLE | |
| GEN9_PARTIAL_RESOLVE_IN_VC_DISABLE)); |
| |
| /* WaCcsTlbPrefetchDisable:skl,bxt,kbl */ |
| WA_CLR_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN5, |
| GEN9_CCS_TLB_PREFETCH_ENABLE); |
| |
| /* WaDisableMaskBasedCammingInRCC:skl,bxt */ |
| if (IS_SKL_REVID(dev_priv, SKL_REVID_C0, SKL_REVID_C0) || |
| IS_BXT_REVID(dev_priv, 0, BXT_REVID_A1)) |
| WA_SET_BIT_MASKED(SLICE_ECO_CHICKEN0, |
| PIXEL_MASK_CAMMING_DISABLE); |
| |
| /* WaForceContextSaveRestoreNonCoherent:skl,bxt,kbl */ |
| WA_SET_BIT_MASKED(HDC_CHICKEN0, |
| HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT | |
| HDC_FORCE_CSR_NON_COHERENT_OVR_DISABLE); |
| |
| /* WaForceEnableNonCoherent and WaDisableHDCInvalidation are |
| * both tied to WaForceContextSaveRestoreNonCoherent |
| * in some hsds for skl. We keep the tie for all gen9. The |
| * documentation is a bit hazy and so we want to get common behaviour, |
| * even though there is no clear evidence we would need both on kbl/bxt. |
| * This area has been source of system hangs so we play it safe |
| * and mimic the skl regardless of what bspec says. |
| * |
| * Use Force Non-Coherent whenever executing a 3D context. This |
| * is a workaround for a possible hang in the unlikely event |
| * a TLB invalidation occurs during a PSD flush. |
| */ |
| |
| /* WaForceEnableNonCoherent:skl,bxt,kbl */ |
| WA_SET_BIT_MASKED(HDC_CHICKEN0, |
| HDC_FORCE_NON_COHERENT); |
| |
| /* WaDisableHDCInvalidation:skl,bxt,kbl */ |
| I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | |
| BDW_DISABLE_HDC_INVALIDATION); |
| |
| /* WaDisableSamplerPowerBypassForSOPingPong:skl,bxt,kbl */ |
| if (IS_SKYLAKE(dev_priv) || |
| IS_KABYLAKE(dev_priv) || |
| IS_BXT_REVID(dev_priv, 0, BXT_REVID_B0)) |
| WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3, |
| GEN8_SAMPLER_POWER_BYPASS_DIS); |
| |
| /* WaDisableSTUnitPowerOptimization:skl,bxt,kbl */ |
| WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN2, GEN8_ST_PO_DISABLE); |
| |
| /* WaOCLCoherentLineFlush:skl,bxt,kbl */ |
| I915_WRITE(GEN8_L3SQCREG4, (I915_READ(GEN8_L3SQCREG4) | |
| GEN8_LQSC_FLUSH_COHERENT_LINES)); |
| |
| /* WaVFEStateAfterPipeControlwithMediaStateClear:skl,bxt */ |
| ret = wa_ring_whitelist_reg(engine, GEN9_CTX_PREEMPT_REG); |
| if (ret) |
| return ret; |
| |
| /* WaEnablePreemptionGranularityControlByUMD:skl,bxt,kbl */ |
| ret= wa_ring_whitelist_reg(engine, GEN8_CS_CHICKEN1); |
| if (ret) |
| return ret; |
| |
| /* WaAllowUMDToModifyHDCChicken1:skl,bxt,kbl */ |
| ret = wa_ring_whitelist_reg(engine, GEN8_HDC_CHICKEN1); |
| if (ret) |
| return ret; |
| |
| return 0; |
| } |
| |
| static int skl_tune_iz_hashing(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| u8 vals[3] = { 0, 0, 0 }; |
| unsigned int i; |
| |
| for (i = 0; i < 3; i++) { |
| u8 ss; |
| |
| /* |
| * Only consider slices where one, and only one, subslice has 7 |
| * EUs |
| */ |
| if (!is_power_of_2(dev_priv->info.subslice_7eu[i])) |
| continue; |
| |
| /* |
| * subslice_7eu[i] != 0 (because of the check above) and |
| * ss_max == 4 (maximum number of subslices possible per slice) |
| * |
| * -> 0 <= ss <= 3; |
| */ |
| ss = ffs(dev_priv->info.subslice_7eu[i]) - 1; |
| vals[i] = 3 - ss; |
| } |
| |
| if (vals[0] == 0 && vals[1] == 0 && vals[2] == 0) |
| return 0; |
| |
| /* Tune IZ hashing. See intel_device_info_runtime_init() */ |
| WA_SET_FIELD_MASKED(GEN7_GT_MODE, |
| GEN9_IZ_HASHING_MASK(2) | |
| GEN9_IZ_HASHING_MASK(1) | |
| GEN9_IZ_HASHING_MASK(0), |
| GEN9_IZ_HASHING(2, vals[2]) | |
| GEN9_IZ_HASHING(1, vals[1]) | |
| GEN9_IZ_HASHING(0, vals[0])); |
| |
| return 0; |
| } |
| |
| static int skl_init_workarounds(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| int ret; |
| |
| ret = gen9_init_workarounds(engine); |
| if (ret) |
| return ret; |
| |
| /* |
| * Actual WA is to disable percontext preemption granularity control |
| * until D0 which is the default case so this is equivalent to |
| * !WaDisablePerCtxtPreemptionGranularityControl:skl |
| */ |
| if (IS_SKL_REVID(dev_priv, SKL_REVID_E0, REVID_FOREVER)) { |
| I915_WRITE(GEN7_FF_SLICE_CS_CHICKEN1, |
| _MASKED_BIT_ENABLE(GEN9_FFSC_PERCTX_PREEMPT_CTRL)); |
| } |
| |
| if (IS_SKL_REVID(dev_priv, 0, SKL_REVID_E0)) { |
| /* WaDisableChickenBitTSGBarrierAckForFFSliceCS:skl */ |
| I915_WRITE(FF_SLICE_CS_CHICKEN2, |
| _MASKED_BIT_ENABLE(GEN9_TSG_BARRIER_ACK_DISABLE)); |
| } |
| |
| /* GEN8_L3SQCREG4 has a dependency with WA batch so any new changes |
| * involving this register should also be added to WA batch as required. |
| */ |
| if (IS_SKL_REVID(dev_priv, 0, SKL_REVID_E0)) |
| /* WaDisableLSQCROPERFforOCL:skl */ |
| I915_WRITE(GEN8_L3SQCREG4, I915_READ(GEN8_L3SQCREG4) | |
| GEN8_LQSC_RO_PERF_DIS); |
| |
| /* WaEnableGapsTsvCreditFix:skl */ |
| if (IS_SKL_REVID(dev_priv, SKL_REVID_C0, REVID_FOREVER)) { |
| I915_WRITE(GEN8_GARBCNTL, (I915_READ(GEN8_GARBCNTL) | |
| GEN9_GAPS_TSV_CREDIT_DISABLE)); |
| } |
| |
| /* WaDisablePowerCompilerClockGating:skl */ |
| if (IS_SKL_REVID(dev_priv, SKL_REVID_B0, SKL_REVID_B0)) |
| WA_SET_BIT_MASKED(HIZ_CHICKEN, |
| BDW_HIZ_POWER_COMPILER_CLOCK_GATING_DISABLE); |
| |
| /* WaBarrierPerformanceFixDisable:skl */ |
| if (IS_SKL_REVID(dev_priv, SKL_REVID_C0, SKL_REVID_D0)) |
| WA_SET_BIT_MASKED(HDC_CHICKEN0, |
| HDC_FENCE_DEST_SLM_DISABLE | |
| HDC_BARRIER_PERFORMANCE_DISABLE); |
| |
| /* WaDisableSbeCacheDispatchPortSharing:skl */ |
| if (IS_SKL_REVID(dev_priv, 0, SKL_REVID_F0)) |
| WA_SET_BIT_MASKED( |
| GEN7_HALF_SLICE_CHICKEN1, |
| GEN7_SBE_SS_CACHE_DISPATCH_PORT_SHARING_DISABLE); |
| |
| /* WaDisableGafsUnitClkGating:skl */ |
| WA_SET_BIT(GEN7_UCGCTL4, GEN8_EU_GAUNIT_CLOCK_GATE_DISABLE); |
| |
| /* WaDisableLSQCROPERFforOCL:skl */ |
| ret = wa_ring_whitelist_reg(engine, GEN8_L3SQCREG4); |
| if (ret) |
| return ret; |
| |
| return skl_tune_iz_hashing(engine); |
| } |
| |
| static int bxt_init_workarounds(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| int ret; |
| |
| ret = gen9_init_workarounds(engine); |
| if (ret) |
| return ret; |
| |
| /* WaStoreMultiplePTEenable:bxt */ |
| /* This is a requirement according to Hardware specification */ |
| if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_A1)) |
| I915_WRITE(TILECTL, I915_READ(TILECTL) | TILECTL_TLBPF); |
| |
| /* WaSetClckGatingDisableMedia:bxt */ |
| if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_A1)) { |
| I915_WRITE(GEN7_MISCCPCTL, (I915_READ(GEN7_MISCCPCTL) & |
| ~GEN8_DOP_CLOCK_GATE_MEDIA_ENABLE)); |
| } |
| |
| /* WaDisableThreadStallDopClockGating:bxt */ |
| WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, |
| STALL_DOP_GATING_DISABLE); |
| |
| /* WaDisablePooledEuLoadBalancingFix:bxt */ |
| if (IS_BXT_REVID(dev_priv, BXT_REVID_B0, REVID_FOREVER)) { |
| WA_SET_BIT_MASKED(FF_SLICE_CS_CHICKEN2, |
| GEN9_POOLED_EU_LOAD_BALANCING_FIX_DISABLE); |
| } |
| |
| /* WaDisableSbeCacheDispatchPortSharing:bxt */ |
| if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_B0)) { |
| WA_SET_BIT_MASKED( |
| GEN7_HALF_SLICE_CHICKEN1, |
| GEN7_SBE_SS_CACHE_DISPATCH_PORT_SHARING_DISABLE); |
| } |
| |
| /* WaDisableObjectLevelPreemptionForTrifanOrPolygon:bxt */ |
| /* WaDisableObjectLevelPreemptionForInstancedDraw:bxt */ |
| /* WaDisableObjectLevelPreemtionForInstanceId:bxt */ |
| /* WaDisableLSQCROPERFforOCL:bxt */ |
| if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_A1)) { |
| ret = wa_ring_whitelist_reg(engine, GEN9_CS_DEBUG_MODE1); |
| if (ret) |
| return ret; |
| |
| ret = wa_ring_whitelist_reg(engine, GEN8_L3SQCREG4); |
| if (ret) |
| return ret; |
| } |
| |
| /* WaProgramL3SqcReg1DefaultForPerf:bxt */ |
| if (IS_BXT_REVID(dev_priv, BXT_REVID_B0, REVID_FOREVER)) |
| I915_WRITE(GEN8_L3SQCREG1, L3_GENERAL_PRIO_CREDITS(62) | |
| L3_HIGH_PRIO_CREDITS(2)); |
| |
| /* WaInsertDummyPushConstPs:bxt */ |
| if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_B0)) |
| WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2, |
| GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION); |
| |
| return 0; |
| } |
| |
| static int kbl_init_workarounds(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| int ret; |
| |
| ret = gen9_init_workarounds(engine); |
| if (ret) |
| return ret; |
| |
| /* WaEnableGapsTsvCreditFix:kbl */ |
| I915_WRITE(GEN8_GARBCNTL, (I915_READ(GEN8_GARBCNTL) | |
| GEN9_GAPS_TSV_CREDIT_DISABLE)); |
| |
| /* WaDisableDynamicCreditSharing:kbl */ |
| if (IS_KBL_REVID(dev_priv, 0, KBL_REVID_B0)) |
| WA_SET_BIT(GAMT_CHKN_BIT_REG, |
| GAMT_CHKN_DISABLE_DYNAMIC_CREDIT_SHARING); |
| |
| /* WaDisableFenceDestinationToSLM:kbl (pre-prod) */ |
| if (IS_KBL_REVID(dev_priv, KBL_REVID_A0, KBL_REVID_A0)) |
| WA_SET_BIT_MASKED(HDC_CHICKEN0, |
| HDC_FENCE_DEST_SLM_DISABLE); |
| |
| /* GEN8_L3SQCREG4 has a dependency with WA batch so any new changes |
| * involving this register should also be added to WA batch as required. |
| */ |
| if (IS_KBL_REVID(dev_priv, 0, KBL_REVID_E0)) |
| /* WaDisableLSQCROPERFforOCL:kbl */ |
| I915_WRITE(GEN8_L3SQCREG4, I915_READ(GEN8_L3SQCREG4) | |
| GEN8_LQSC_RO_PERF_DIS); |
| |
| /* WaInsertDummyPushConstPs:kbl */ |
| if (IS_KBL_REVID(dev_priv, 0, KBL_REVID_B0)) |
| WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2, |
| GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION); |
| |
| /* WaDisableGafsUnitClkGating:kbl */ |
| WA_SET_BIT(GEN7_UCGCTL4, GEN8_EU_GAUNIT_CLOCK_GATE_DISABLE); |
| |
| /* WaDisableSbeCacheDispatchPortSharing:kbl */ |
| WA_SET_BIT_MASKED( |
| GEN7_HALF_SLICE_CHICKEN1, |
| GEN7_SBE_SS_CACHE_DISPATCH_PORT_SHARING_DISABLE); |
| |
| /* WaDisableLSQCROPERFforOCL:kbl */ |
| ret = wa_ring_whitelist_reg(engine, GEN8_L3SQCREG4); |
| if (ret) |
| return ret; |
| |
| return 0; |
| } |
| |
| int init_workarounds_ring(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| WARN_ON(engine->id != RCS); |
| |
| dev_priv->workarounds.count = 0; |
| dev_priv->workarounds.hw_whitelist_count[RCS] = 0; |
| |
| if (IS_BROADWELL(dev_priv)) |
| return bdw_init_workarounds(engine); |
| |
| if (IS_CHERRYVIEW(dev_priv)) |
| return chv_init_workarounds(engine); |
| |
| if (IS_SKYLAKE(dev_priv)) |
| return skl_init_workarounds(engine); |
| |
| if (IS_BROXTON(dev_priv)) |
| return bxt_init_workarounds(engine); |
| |
| if (IS_KABYLAKE(dev_priv)) |
| return kbl_init_workarounds(engine); |
| |
| return 0; |
| } |
| |
| static int init_render_ring(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| int ret = init_ring_common(engine); |
| if (ret) |
| return ret; |
| |
| /* WaTimedSingleVertexDispatch:cl,bw,ctg,elk,ilk,snb */ |
| if (IS_GEN(dev_priv, 4, 6)) |
| I915_WRITE(MI_MODE, _MASKED_BIT_ENABLE(VS_TIMER_DISPATCH)); |
| |
| /* We need to disable the AsyncFlip performance optimisations in order |
| * to use MI_WAIT_FOR_EVENT within the CS. It should already be |
| * programmed to '1' on all products. |
| * |
| * WaDisableAsyncFlipPerfMode:snb,ivb,hsw,vlv |
| */ |
| if (IS_GEN(dev_priv, 6, 7)) |
| I915_WRITE(MI_MODE, _MASKED_BIT_ENABLE(ASYNC_FLIP_PERF_DISABLE)); |
| |
| /* Required for the hardware to program scanline values for waiting */ |
| /* WaEnableFlushTlbInvalidationMode:snb */ |
| if (IS_GEN6(dev_priv)) |
| I915_WRITE(GFX_MODE, |
| _MASKED_BIT_ENABLE(GFX_TLB_INVALIDATE_EXPLICIT)); |
| |
| /* WaBCSVCSTlbInvalidationMode:ivb,vlv,hsw */ |
| if (IS_GEN7(dev_priv)) |
| I915_WRITE(GFX_MODE_GEN7, |
| _MASKED_BIT_ENABLE(GFX_TLB_INVALIDATE_EXPLICIT) | |
| _MASKED_BIT_ENABLE(GFX_REPLAY_MODE)); |
| |
| if (IS_GEN6(dev_priv)) { |
| /* From the Sandybridge PRM, volume 1 part 3, page 24: |
| * "If this bit is set, STCunit will have LRA as replacement |
| * policy. [...] This bit must be reset. LRA replacement |
| * policy is not supported." |
| */ |
| I915_WRITE(CACHE_MODE_0, |
| _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB)); |
| } |
| |
| if (IS_GEN(dev_priv, 6, 7)) |
| I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_FORCE_ORDERING)); |
| |
| if (HAS_L3_DPF(dev_priv)) |
| I915_WRITE_IMR(engine, ~GT_PARITY_ERROR(dev_priv)); |
| |
| return init_workarounds_ring(engine); |
| } |
| |
| static void render_ring_cleanup(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| if (dev_priv->semaphore_obj) { |
| i915_gem_object_ggtt_unpin(dev_priv->semaphore_obj); |
| drm_gem_object_unreference(&dev_priv->semaphore_obj->base); |
| dev_priv->semaphore_obj = NULL; |
| } |
| |
| intel_fini_pipe_control(engine); |
| } |
| |
| static int gen8_rcs_signal(struct drm_i915_gem_request *signaller_req, |
| unsigned int num_dwords) |
| { |
| #define MBOX_UPDATE_DWORDS 8 |
| struct intel_engine_cs *signaller = signaller_req->engine; |
| struct drm_i915_private *dev_priv = signaller_req->i915; |
| struct intel_engine_cs *waiter; |
| enum intel_engine_id id; |
| int ret, num_rings; |
| |
| num_rings = hweight32(INTEL_INFO(dev_priv)->ring_mask); |
| num_dwords += (num_rings-1) * MBOX_UPDATE_DWORDS; |
| #undef MBOX_UPDATE_DWORDS |
| |
| ret = intel_ring_begin(signaller_req, num_dwords); |
| if (ret) |
| return ret; |
| |
| for_each_engine_id(waiter, dev_priv, id) { |
| u32 seqno; |
| u64 gtt_offset = signaller->semaphore.signal_ggtt[id]; |
| if (gtt_offset == MI_SEMAPHORE_SYNC_INVALID) |
| continue; |
| |
| seqno = i915_gem_request_get_seqno(signaller_req); |
| intel_ring_emit(signaller, GFX_OP_PIPE_CONTROL(6)); |
| intel_ring_emit(signaller, PIPE_CONTROL_GLOBAL_GTT_IVB | |
| PIPE_CONTROL_QW_WRITE | |
| PIPE_CONTROL_CS_STALL); |
| intel_ring_emit(signaller, lower_32_bits(gtt_offset)); |
| intel_ring_emit(signaller, upper_32_bits(gtt_offset)); |
| intel_ring_emit(signaller, seqno); |
| intel_ring_emit(signaller, 0); |
| intel_ring_emit(signaller, MI_SEMAPHORE_SIGNAL | |
| MI_SEMAPHORE_TARGET(waiter->hw_id)); |
| intel_ring_emit(signaller, 0); |
| } |
| |
| return 0; |
| } |
| |
| static int gen8_xcs_signal(struct drm_i915_gem_request *signaller_req, |
| unsigned int num_dwords) |
| { |
| #define MBOX_UPDATE_DWORDS 6 |
| struct intel_engine_cs *signaller = signaller_req->engine; |
| struct drm_i915_private *dev_priv = signaller_req->i915; |
| struct intel_engine_cs *waiter; |
| enum intel_engine_id id; |
| int ret, num_rings; |
| |
| num_rings = hweight32(INTEL_INFO(dev_priv)->ring_mask); |
| num_dwords += (num_rings-1) * MBOX_UPDATE_DWORDS; |
| #undef MBOX_UPDATE_DWORDS |
| |
| ret = intel_ring_begin(signaller_req, num_dwords); |
| if (ret) |
| return ret; |
| |
| for_each_engine_id(waiter, dev_priv, id) { |
| u32 seqno; |
| u64 gtt_offset = signaller->semaphore.signal_ggtt[id]; |
| if (gtt_offset == MI_SEMAPHORE_SYNC_INVALID) |
| continue; |
| |
| seqno = i915_gem_request_get_seqno(signaller_req); |
| intel_ring_emit(signaller, (MI_FLUSH_DW + 1) | |
| MI_FLUSH_DW_OP_STOREDW); |
| intel_ring_emit(signaller, lower_32_bits(gtt_offset) | |
| MI_FLUSH_DW_USE_GTT); |
| intel_ring_emit(signaller, upper_32_bits(gtt_offset)); |
| intel_ring_emit(signaller, seqno); |
| intel_ring_emit(signaller, MI_SEMAPHORE_SIGNAL | |
| MI_SEMAPHORE_TARGET(waiter->hw_id)); |
| intel_ring_emit(signaller, 0); |
| } |
| |
| return 0; |
| } |
| |
| static int gen6_signal(struct drm_i915_gem_request *signaller_req, |
| unsigned int num_dwords) |
| { |
| struct intel_engine_cs *signaller = signaller_req->engine; |
| struct drm_i915_private *dev_priv = signaller_req->i915; |
| struct intel_engine_cs *useless; |
| enum intel_engine_id id; |
| int ret, num_rings; |
| |
| #define MBOX_UPDATE_DWORDS 3 |
| num_rings = hweight32(INTEL_INFO(dev_priv)->ring_mask); |
| num_dwords += round_up((num_rings-1) * MBOX_UPDATE_DWORDS, 2); |
| #undef MBOX_UPDATE_DWORDS |
| |
| ret = intel_ring_begin(signaller_req, num_dwords); |
| if (ret) |
| return ret; |
| |
| for_each_engine_id(useless, dev_priv, id) { |
| i915_reg_t mbox_reg = signaller->semaphore.mbox.signal[id]; |
| |
| if (i915_mmio_reg_valid(mbox_reg)) { |
| u32 seqno = i915_gem_request_get_seqno(signaller_req); |
| |
| intel_ring_emit(signaller, MI_LOAD_REGISTER_IMM(1)); |
| intel_ring_emit_reg(signaller, mbox_reg); |
| intel_ring_emit(signaller, seqno); |
| } |
| } |
| |
| /* If num_dwords was rounded, make sure the tail pointer is correct */ |
| if (num_rings % 2 == 0) |
| intel_ring_emit(signaller, MI_NOOP); |
| |
| return 0; |
| } |
| |
| /** |
| * gen6_add_request - Update the semaphore mailbox registers |
| * |
| * @request - request to write to the ring |
| * |
| * Update the mailbox registers in the *other* rings with the current seqno. |
| * This acts like a signal in the canonical semaphore. |
| */ |
| static int |
| gen6_add_request(struct drm_i915_gem_request *req) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| int ret; |
| |
| if (engine->semaphore.signal) |
| ret = engine->semaphore.signal(req, 4); |
| else |
| ret = intel_ring_begin(req, 4); |
| |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, MI_STORE_DWORD_INDEX); |
| intel_ring_emit(engine, |
| I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT); |
| intel_ring_emit(engine, i915_gem_request_get_seqno(req)); |
| intel_ring_emit(engine, MI_USER_INTERRUPT); |
| __intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| static int |
| gen8_render_add_request(struct drm_i915_gem_request *req) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| int ret; |
| |
| if (engine->semaphore.signal) |
| ret = engine->semaphore.signal(req, 8); |
| else |
| ret = intel_ring_begin(req, 8); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, GFX_OP_PIPE_CONTROL(6)); |
| intel_ring_emit(engine, (PIPE_CONTROL_GLOBAL_GTT_IVB | |
| PIPE_CONTROL_CS_STALL | |
| PIPE_CONTROL_QW_WRITE)); |
| intel_ring_emit(engine, intel_hws_seqno_address(req->engine)); |
| intel_ring_emit(engine, 0); |
| intel_ring_emit(engine, i915_gem_request_get_seqno(req)); |
| /* We're thrashing one dword of HWS. */ |
| intel_ring_emit(engine, 0); |
| intel_ring_emit(engine, MI_USER_INTERRUPT); |
| intel_ring_emit(engine, MI_NOOP); |
| __intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| static inline bool i915_gem_has_seqno_wrapped(struct drm_i915_private *dev_priv, |
| u32 seqno) |
| { |
| return dev_priv->last_seqno < seqno; |
| } |
| |
| /** |
| * intel_ring_sync - sync the waiter to the signaller on seqno |
| * |
| * @waiter - ring that is waiting |
| * @signaller - ring which has, or will signal |
| * @seqno - seqno which the waiter will block on |
| */ |
| |
| static int |
| gen8_ring_sync(struct drm_i915_gem_request *waiter_req, |
| struct intel_engine_cs *signaller, |
| u32 seqno) |
| { |
| struct intel_engine_cs *waiter = waiter_req->engine; |
| struct drm_i915_private *dev_priv = waiter_req->i915; |
| struct i915_hw_ppgtt *ppgtt; |
| int ret; |
| |
| ret = intel_ring_begin(waiter_req, 4); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(waiter, MI_SEMAPHORE_WAIT | |
| MI_SEMAPHORE_GLOBAL_GTT | |
| MI_SEMAPHORE_SAD_GTE_SDD); |
| intel_ring_emit(waiter, seqno); |
| intel_ring_emit(waiter, |
| lower_32_bits(GEN8_WAIT_OFFSET(waiter, signaller->id))); |
| intel_ring_emit(waiter, |
| upper_32_bits(GEN8_WAIT_OFFSET(waiter, signaller->id))); |
| intel_ring_advance(waiter); |
| |
| /* When the !RCS engines idle waiting upon a semaphore, they lose their |
| * pagetables and we must reload them before executing the batch. |
| * We do this on the i915_switch_context() following the wait and |
| * before the dispatch. |
| */ |
| ppgtt = waiter_req->ctx->ppgtt; |
| if (ppgtt && waiter_req->engine->id != RCS) |
| ppgtt->pd_dirty_rings |= intel_engine_flag(waiter_req->engine); |
| return 0; |
| } |
| |
| static int |
| gen6_ring_sync(struct drm_i915_gem_request *waiter_req, |
| struct intel_engine_cs *signaller, |
| u32 seqno) |
| { |
| struct intel_engine_cs *waiter = waiter_req->engine; |
| u32 dw1 = MI_SEMAPHORE_MBOX | |
| MI_SEMAPHORE_COMPARE | |
| MI_SEMAPHORE_REGISTER; |
| u32 wait_mbox = signaller->semaphore.mbox.wait[waiter->id]; |
| int ret; |
| |
| /* Throughout all of the GEM code, seqno passed implies our current |
| * seqno is >= the last seqno executed. However for hardware the |
| * comparison is strictly greater than. |
| */ |
| seqno -= 1; |
| |
| WARN_ON(wait_mbox == MI_SEMAPHORE_SYNC_INVALID); |
| |
| ret = intel_ring_begin(waiter_req, 4); |
| if (ret) |
| return ret; |
| |
| /* If seqno wrap happened, omit the wait with no-ops */ |
| if (likely(!i915_gem_has_seqno_wrapped(waiter_req->i915, seqno))) { |
| intel_ring_emit(waiter, dw1 | wait_mbox); |
| intel_ring_emit(waiter, seqno); |
| intel_ring_emit(waiter, 0); |
| intel_ring_emit(waiter, MI_NOOP); |
| } else { |
| intel_ring_emit(waiter, MI_NOOP); |
| intel_ring_emit(waiter, MI_NOOP); |
| intel_ring_emit(waiter, MI_NOOP); |
| intel_ring_emit(waiter, MI_NOOP); |
| } |
| intel_ring_advance(waiter); |
| |
| return 0; |
| } |
| |
| #define PIPE_CONTROL_FLUSH(ring__, addr__) \ |
| do { \ |
| intel_ring_emit(ring__, GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE | \ |
| PIPE_CONTROL_DEPTH_STALL); \ |
| intel_ring_emit(ring__, (addr__) | PIPE_CONTROL_GLOBAL_GTT); \ |
| intel_ring_emit(ring__, 0); \ |
| intel_ring_emit(ring__, 0); \ |
| } while (0) |
| |
| static int |
| pc_render_add_request(struct drm_i915_gem_request *req) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| u32 scratch_addr = engine->scratch.gtt_offset + 2 * CACHELINE_BYTES; |
| int ret; |
| |
| /* For Ironlake, MI_USER_INTERRUPT was deprecated and apparently |
| * incoherent with writes to memory, i.e. completely fubar, |
| * so we need to use PIPE_NOTIFY instead. |
| * |
| * However, we also need to workaround the qword write |
| * incoherence by flushing the 6 PIPE_NOTIFY buffers out to |
| * memory before requesting an interrupt. |
| */ |
| ret = intel_ring_begin(req, 32); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, |
| GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE | |
| PIPE_CONTROL_WRITE_FLUSH | |
| PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE); |
| intel_ring_emit(engine, |
| engine->scratch.gtt_offset | PIPE_CONTROL_GLOBAL_GTT); |
| intel_ring_emit(engine, i915_gem_request_get_seqno(req)); |
| intel_ring_emit(engine, 0); |
| PIPE_CONTROL_FLUSH(engine, scratch_addr); |
| scratch_addr += 2 * CACHELINE_BYTES; /* write to separate cachelines */ |
| PIPE_CONTROL_FLUSH(engine, scratch_addr); |
| scratch_addr += 2 * CACHELINE_BYTES; |
| PIPE_CONTROL_FLUSH(engine, scratch_addr); |
| scratch_addr += 2 * CACHELINE_BYTES; |
| PIPE_CONTROL_FLUSH(engine, scratch_addr); |
| scratch_addr += 2 * CACHELINE_BYTES; |
| PIPE_CONTROL_FLUSH(engine, scratch_addr); |
| scratch_addr += 2 * CACHELINE_BYTES; |
| PIPE_CONTROL_FLUSH(engine, scratch_addr); |
| |
| intel_ring_emit(engine, |
| GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE | |
| PIPE_CONTROL_WRITE_FLUSH | |
| PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE | |
| PIPE_CONTROL_NOTIFY); |
| intel_ring_emit(engine, |
| engine->scratch.gtt_offset | PIPE_CONTROL_GLOBAL_GTT); |
| intel_ring_emit(engine, i915_gem_request_get_seqno(req)); |
| intel_ring_emit(engine, 0); |
| __intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| static void |
| gen6_seqno_barrier(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| /* Workaround to force correct ordering between irq and seqno writes on |
| * ivb (and maybe also on snb) by reading from a CS register (like |
| * ACTHD) before reading the status page. |
| * |
| * Note that this effectively stalls the read by the time it takes to |
| * do a memory transaction, which more or less ensures that the write |
| * from the GPU has sufficient time to invalidate the CPU cacheline. |
| * Alternatively we could delay the interrupt from the CS ring to give |
| * the write time to land, but that would incur a delay after every |
| * batch i.e. much more frequent than a delay when waiting for the |
| * interrupt (with the same net latency). |
| * |
| * Also note that to prevent whole machine hangs on gen7, we have to |
| * take the spinlock to guard against concurrent cacheline access. |
| */ |
| spin_lock_irq(&dev_priv->uncore.lock); |
| POSTING_READ_FW(RING_ACTHD(engine->mmio_base)); |
| spin_unlock_irq(&dev_priv->uncore.lock); |
| } |
| |
| static u32 |
| ring_get_seqno(struct intel_engine_cs *engine) |
| { |
| return intel_read_status_page(engine, I915_GEM_HWS_INDEX); |
| } |
| |
| static void |
| ring_set_seqno(struct intel_engine_cs *engine, u32 seqno) |
| { |
| intel_write_status_page(engine, I915_GEM_HWS_INDEX, seqno); |
| } |
| |
| static u32 |
| pc_render_get_seqno(struct intel_engine_cs *engine) |
| { |
| return engine->scratch.cpu_page[0]; |
| } |
| |
| static void |
| pc_render_set_seqno(struct intel_engine_cs *engine, u32 seqno) |
| { |
| engine->scratch.cpu_page[0] = seqno; |
| } |
| |
| static bool |
| gen5_ring_get_irq(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| unsigned long flags; |
| |
| if (WARN_ON(!intel_irqs_enabled(dev_priv))) |
| return false; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| if (engine->irq_refcount++ == 0) |
| gen5_enable_gt_irq(dev_priv, engine->irq_enable_mask); |
| spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| |
| return true; |
| } |
| |
| static void |
| gen5_ring_put_irq(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| if (--engine->irq_refcount == 0) |
| gen5_disable_gt_irq(dev_priv, engine->irq_enable_mask); |
| spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| } |
| |
| static bool |
| i9xx_ring_get_irq(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| unsigned long flags; |
| |
| if (!intel_irqs_enabled(dev_priv)) |
| return false; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| if (engine->irq_refcount++ == 0) { |
| dev_priv->irq_mask &= ~engine->irq_enable_mask; |
| I915_WRITE(IMR, dev_priv->irq_mask); |
| POSTING_READ(IMR); |
| } |
| spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| |
| return true; |
| } |
| |
| static void |
| i9xx_ring_put_irq(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| if (--engine->irq_refcount == 0) { |
| dev_priv->irq_mask |= engine->irq_enable_mask; |
| I915_WRITE(IMR, dev_priv->irq_mask); |
| POSTING_READ(IMR); |
| } |
| spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| } |
| |
| static bool |
| i8xx_ring_get_irq(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| unsigned long flags; |
| |
| if (!intel_irqs_enabled(dev_priv)) |
| return false; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| if (engine->irq_refcount++ == 0) { |
| dev_priv->irq_mask &= ~engine->irq_enable_mask; |
| I915_WRITE16(IMR, dev_priv->irq_mask); |
| POSTING_READ16(IMR); |
| } |
| spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| |
| return true; |
| } |
| |
| static void |
| i8xx_ring_put_irq(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| if (--engine->irq_refcount == 0) { |
| dev_priv->irq_mask |= engine->irq_enable_mask; |
| I915_WRITE16(IMR, dev_priv->irq_mask); |
| POSTING_READ16(IMR); |
| } |
| spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| } |
| |
| static int |
| bsd_ring_flush(struct drm_i915_gem_request *req, |
| u32 invalidate_domains, |
| u32 flush_domains) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| int ret; |
| |
| ret = intel_ring_begin(req, 2); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, MI_FLUSH); |
| intel_ring_emit(engine, MI_NOOP); |
| intel_ring_advance(engine); |
| return 0; |
| } |
| |
| static int |
| i9xx_add_request(struct drm_i915_gem_request *req) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| int ret; |
| |
| ret = intel_ring_begin(req, 4); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, MI_STORE_DWORD_INDEX); |
| intel_ring_emit(engine, |
| I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT); |
| intel_ring_emit(engine, i915_gem_request_get_seqno(req)); |
| intel_ring_emit(engine, MI_USER_INTERRUPT); |
| __intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| static bool |
| gen6_ring_get_irq(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| unsigned long flags; |
| |
| if (WARN_ON(!intel_irqs_enabled(dev_priv))) |
| return false; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| if (engine->irq_refcount++ == 0) { |
| if (HAS_L3_DPF(dev_priv) && engine->id == RCS) |
| I915_WRITE_IMR(engine, |
| ~(engine->irq_enable_mask | |
| GT_PARITY_ERROR(dev_priv))); |
| else |
| I915_WRITE_IMR(engine, ~engine->irq_enable_mask); |
| gen5_enable_gt_irq(dev_priv, engine->irq_enable_mask); |
| } |
| spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| |
| return true; |
| } |
| |
| static void |
| gen6_ring_put_irq(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| if (--engine->irq_refcount == 0) { |
| if (HAS_L3_DPF(dev_priv) && engine->id == RCS) |
| I915_WRITE_IMR(engine, ~GT_PARITY_ERROR(dev_priv)); |
| else |
| I915_WRITE_IMR(engine, ~0); |
| gen5_disable_gt_irq(dev_priv, engine->irq_enable_mask); |
| } |
| spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| } |
| |
| static bool |
| hsw_vebox_get_irq(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| unsigned long flags; |
| |
| if (WARN_ON(!intel_irqs_enabled(dev_priv))) |
| return false; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| if (engine->irq_refcount++ == 0) { |
| I915_WRITE_IMR(engine, ~engine->irq_enable_mask); |
| gen6_enable_pm_irq(dev_priv, engine->irq_enable_mask); |
| } |
| spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| |
| return true; |
| } |
| |
| static void |
| hsw_vebox_put_irq(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| if (--engine->irq_refcount == 0) { |
| I915_WRITE_IMR(engine, ~0); |
| gen6_disable_pm_irq(dev_priv, engine->irq_enable_mask); |
| } |
| spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| } |
| |
| static bool |
| gen8_ring_get_irq(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| unsigned long flags; |
| |
| if (WARN_ON(!intel_irqs_enabled(dev_priv))) |
| return false; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| if (engine->irq_refcount++ == 0) { |
| if (HAS_L3_DPF(dev_priv) && engine->id == RCS) { |
| I915_WRITE_IMR(engine, |
| ~(engine->irq_enable_mask | |
| GT_RENDER_L3_PARITY_ERROR_INTERRUPT)); |
| } else { |
| I915_WRITE_IMR(engine, ~engine->irq_enable_mask); |
| } |
| POSTING_READ(RING_IMR(engine->mmio_base)); |
| } |
| spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| |
| return true; |
| } |
| |
| static void |
| gen8_ring_put_irq(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| if (--engine->irq_refcount == 0) { |
| if (HAS_L3_DPF(dev_priv) && engine->id == RCS) { |
| I915_WRITE_IMR(engine, |
| ~GT_RENDER_L3_PARITY_ERROR_INTERRUPT); |
| } else { |
| I915_WRITE_IMR(engine, ~0); |
| } |
| POSTING_READ(RING_IMR(engine->mmio_base)); |
| } |
| spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| } |
| |
| static int |
| i965_dispatch_execbuffer(struct drm_i915_gem_request *req, |
| u64 offset, u32 length, |
| unsigned dispatch_flags) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| int ret; |
| |
| ret = intel_ring_begin(req, 2); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, |
| MI_BATCH_BUFFER_START | |
| MI_BATCH_GTT | |
| (dispatch_flags & I915_DISPATCH_SECURE ? |
| 0 : MI_BATCH_NON_SECURE_I965)); |
| intel_ring_emit(engine, offset); |
| intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| /* Just userspace ABI convention to limit the wa batch bo to a resonable size */ |
| #define I830_BATCH_LIMIT (256*1024) |
| #define I830_TLB_ENTRIES (2) |
| #define I830_WA_SIZE max(I830_TLB_ENTRIES*4096, I830_BATCH_LIMIT) |
| static int |
| i830_dispatch_execbuffer(struct drm_i915_gem_request *req, |
| u64 offset, u32 len, |
| unsigned dispatch_flags) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| u32 cs_offset = engine->scratch.gtt_offset; |
| int ret; |
| |
| ret = intel_ring_begin(req, 6); |
| if (ret) |
| return ret; |
| |
| /* Evict the invalid PTE TLBs */ |
| intel_ring_emit(engine, COLOR_BLT_CMD | BLT_WRITE_RGBA); |
| intel_ring_emit(engine, BLT_DEPTH_32 | BLT_ROP_COLOR_COPY | 4096); |
| intel_ring_emit(engine, I830_TLB_ENTRIES << 16 | 4); /* load each page */ |
| intel_ring_emit(engine, cs_offset); |
| intel_ring_emit(engine, 0xdeadbeef); |
| intel_ring_emit(engine, MI_NOOP); |
| intel_ring_advance(engine); |
| |
| if ((dispatch_flags & I915_DISPATCH_PINNED) == 0) { |
| if (len > I830_BATCH_LIMIT) |
| return -ENOSPC; |
| |
| ret = intel_ring_begin(req, 6 + 2); |
| if (ret) |
| return ret; |
| |
| /* Blit the batch (which has now all relocs applied) to the |
| * stable batch scratch bo area (so that the CS never |
| * stumbles over its tlb invalidation bug) ... |
| */ |
| intel_ring_emit(engine, SRC_COPY_BLT_CMD | BLT_WRITE_RGBA); |
| intel_ring_emit(engine, |
| BLT_DEPTH_32 | BLT_ROP_SRC_COPY | 4096); |
| intel_ring_emit(engine, DIV_ROUND_UP(len, 4096) << 16 | 4096); |
| intel_ring_emit(engine, cs_offset); |
| intel_ring_emit(engine, 4096); |
| intel_ring_emit(engine, offset); |
| |
| intel_ring_emit(engine, MI_FLUSH); |
| intel_ring_emit(engine, MI_NOOP); |
| intel_ring_advance(engine); |
| |
| /* ... and execute it. */ |
| offset = cs_offset; |
| } |
| |
| ret = intel_ring_begin(req, 2); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, MI_BATCH_BUFFER_START | MI_BATCH_GTT); |
| intel_ring_emit(engine, offset | (dispatch_flags & I915_DISPATCH_SECURE ? |
| 0 : MI_BATCH_NON_SECURE)); |
| intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| static int |
| i915_dispatch_execbuffer(struct drm_i915_gem_request *req, |
| u64 offset, u32 len, |
| unsigned dispatch_flags) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| int ret; |
| |
| ret = intel_ring_begin(req, 2); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, MI_BATCH_BUFFER_START | MI_BATCH_GTT); |
| intel_ring_emit(engine, offset | (dispatch_flags & I915_DISPATCH_SECURE ? |
| 0 : MI_BATCH_NON_SECURE)); |
| intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| static void cleanup_phys_status_page(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| if (!dev_priv->status_page_dmah) |
| return; |
| |
| drm_pci_free(dev_priv->dev, dev_priv->status_page_dmah); |
| engine->status_page.page_addr = NULL; |
| } |
| |
| static void cleanup_status_page(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_gem_object *obj; |
| |
| obj = engine->status_page.obj; |
| if (obj == NULL) |
| return; |
| |
| kunmap(sg_page(obj->pages->sgl)); |
| i915_gem_object_ggtt_unpin(obj); |
| drm_gem_object_unreference(&obj->base); |
| engine->status_page.obj = NULL; |
| } |
| |
| static int init_status_page(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_gem_object *obj = engine->status_page.obj; |
| |
| if (obj == NULL) { |
| unsigned flags; |
| int ret; |
| |
| obj = i915_gem_object_create(engine->i915->dev, 4096); |
| if (IS_ERR(obj)) { |
| DRM_ERROR("Failed to allocate status page\n"); |
| return PTR_ERR(obj); |
| } |
| |
| ret = i915_gem_object_set_cache_level(obj, I915_CACHE_LLC); |
| if (ret) |
| goto err_unref; |
| |
| flags = 0; |
| if (!HAS_LLC(engine->i915)) |
| /* On g33, we cannot place HWS above 256MiB, so |
| * restrict its pinning to the low mappable arena. |
| * Though this restriction is not documented for |
| * gen4, gen5, or byt, they also behave similarly |
| * and hang if the HWS is placed at the top of the |
| * GTT. To generalise, it appears that all !llc |
| * platforms have issues with us placing the HWS |
| * above the mappable region (even though we never |
| * actualy map it). |
| */ |
| flags |= PIN_MAPPABLE; |
| ret = i915_gem_obj_ggtt_pin(obj, 4096, flags); |
| if (ret) { |
| err_unref: |
| drm_gem_object_unreference(&obj->base); |
| return ret; |
| } |
| |
| engine->status_page.obj = obj; |
| } |
| |
| engine->status_page.gfx_addr = i915_gem_obj_ggtt_offset(obj); |
| engine->status_page.page_addr = kmap(sg_page(obj->pages->sgl)); |
| memset(engine->status_page.page_addr, 0, PAGE_SIZE); |
| |
| DRM_DEBUG_DRIVER("%s hws offset: 0x%08x\n", |
| engine->name, engine->status_page.gfx_addr); |
| |
| return 0; |
| } |
| |
| static int init_phys_status_page(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| if (!dev_priv->status_page_dmah) { |
| dev_priv->status_page_dmah = |
| drm_pci_alloc(dev_priv->dev, PAGE_SIZE, PAGE_SIZE); |
| if (!dev_priv->status_page_dmah) |
| return -ENOMEM; |
| } |
| |
| engine->status_page.page_addr = dev_priv->status_page_dmah->vaddr; |
| memset(engine->status_page.page_addr, 0, PAGE_SIZE); |
| |
| return 0; |
| } |
| |
| void intel_unpin_ringbuffer_obj(struct intel_ringbuffer *ringbuf) |
| { |
| GEM_BUG_ON(ringbuf->vma == NULL); |
| GEM_BUG_ON(ringbuf->virtual_start == NULL); |
| |
| if (HAS_LLC(ringbuf->obj->base.dev) && !ringbuf->obj->stolen) |
| i915_gem_object_unpin_map(ringbuf->obj); |
| else |
| i915_vma_unpin_iomap(ringbuf->vma); |
| ringbuf->virtual_start = NULL; |
| |
| i915_gem_object_ggtt_unpin(ringbuf->obj); |
| ringbuf->vma = NULL; |
| } |
| |
| int intel_pin_and_map_ringbuffer_obj(struct drm_i915_private *dev_priv, |
| struct intel_ringbuffer *ringbuf) |
| { |
| struct drm_i915_gem_object *obj = ringbuf->obj; |
| /* Ring wraparound at offset 0 sometimes hangs. No idea why. */ |
| unsigned flags = PIN_OFFSET_BIAS | 4096; |
| void *addr; |
| int ret; |
| |
| if (HAS_LLC(dev_priv) && !obj->stolen) { |
| ret = i915_gem_obj_ggtt_pin(obj, PAGE_SIZE, flags); |
| if (ret) |
| return ret; |
| |
| ret = i915_gem_object_set_to_cpu_domain(obj, true); |
| if (ret) |
| goto err_unpin; |
| |
| addr = i915_gem_object_pin_map(obj); |
| if (IS_ERR(addr)) { |
| ret = PTR_ERR(addr); |
| goto err_unpin; |
| } |
| } else { |
| ret = i915_gem_obj_ggtt_pin(obj, PAGE_SIZE, |
| flags | PIN_MAPPABLE); |
| if (ret) |
| return ret; |
| |
| ret = i915_gem_object_set_to_gtt_domain(obj, true); |
| if (ret) |
| goto err_unpin; |
| |
| /* Access through the GTT requires the device to be awake. */ |
| assert_rpm_wakelock_held(dev_priv); |
| |
| addr = i915_vma_pin_iomap(i915_gem_obj_to_ggtt(obj)); |
| if (IS_ERR(addr)) { |
| ret = PTR_ERR(addr); |
| goto err_unpin; |
| } |
| } |
| |
| ringbuf->virtual_start = addr; |
| ringbuf->vma = i915_gem_obj_to_ggtt(obj); |
| return 0; |
| |
| err_unpin: |
| i915_gem_object_ggtt_unpin(obj); |
| return ret; |
| } |
| |
| static void intel_destroy_ringbuffer_obj(struct intel_ringbuffer *ringbuf) |
| { |
| drm_gem_object_unreference(&ringbuf->obj->base); |
| ringbuf->obj = NULL; |
| } |
| |
| static int intel_alloc_ringbuffer_obj(struct drm_device *dev, |
| struct intel_ringbuffer *ringbuf) |
| { |
| struct drm_i915_gem_object *obj; |
| |
| obj = NULL; |
| if (!HAS_LLC(dev)) |
| obj = i915_gem_object_create_stolen(dev, ringbuf->size); |
| if (obj == NULL) |
| obj = i915_gem_object_create(dev, ringbuf->size); |
| if (IS_ERR(obj)) |
| return PTR_ERR(obj); |
| |
| /* mark ring buffers as read-only from GPU side by default */ |
| obj->gt_ro = 1; |
| |
| ringbuf->obj = obj; |
| |
| return 0; |
| } |
| |
| struct intel_ringbuffer * |
| intel_engine_create_ringbuffer(struct intel_engine_cs *engine, int size) |
| { |
| struct intel_ringbuffer *ring; |
| int ret; |
| |
| ring = kzalloc(sizeof(*ring), GFP_KERNEL); |
| if (ring == NULL) { |
| DRM_DEBUG_DRIVER("Failed to allocate ringbuffer %s\n", |
| engine->name); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| ring->engine = engine; |
| list_add(&ring->link, &engine->buffers); |
| |
| ring->size = size; |
| /* Workaround an erratum on the i830 which causes a hang if |
| * the TAIL pointer points to within the last 2 cachelines |
| * of the buffer. |
| */ |
| ring->effective_size = size; |
| if (IS_I830(engine->i915) || IS_845G(engine->i915)) |
| ring->effective_size -= 2 * CACHELINE_BYTES; |
| |
| ring->last_retired_head = -1; |
| intel_ring_update_space(ring); |
| |
| ret = intel_alloc_ringbuffer_obj(engine->i915->dev, ring); |
| if (ret) { |
| DRM_DEBUG_DRIVER("Failed to allocate ringbuffer %s: %d\n", |
| engine->name, ret); |
| list_del(&ring->link); |
| kfree(ring); |
| return ERR_PTR(ret); |
| } |
| |
| return ring; |
| } |
| |
| void |
| intel_ringbuffer_free(struct intel_ringbuffer *ring) |
| { |
| intel_destroy_ringbuffer_obj(ring); |
| list_del(&ring->link); |
| kfree(ring); |
| } |
| |
| static int intel_ring_context_pin(struct i915_gem_context *ctx, |
| struct intel_engine_cs *engine) |
| { |
| struct intel_context *ce = &ctx->engine[engine->id]; |
| int ret; |
| |
| lockdep_assert_held(&ctx->i915->dev->struct_mutex); |
| |
| if (ce->pin_count++) |
| return 0; |
| |
| if (ce->state) { |
| ret = i915_gem_obj_ggtt_pin(ce->state, ctx->ggtt_alignment, 0); |
| if (ret) |
| goto error; |
| } |
| |
| /* The kernel context is only used as a placeholder for flushing the |
| * active context. It is never used for submitting user rendering and |
| * as such never requires the golden render context, and so we can skip |
| * emitting it when we switch to the kernel context. This is required |
| * as during eviction we cannot allocate and pin the renderstate in |
| * order to initialise the context. |
| */ |
| if (ctx == ctx->i915->kernel_context) |
| ce->initialised = true; |
| |
| i915_gem_context_reference(ctx); |
| return 0; |
| |
| error: |
| ce->pin_count = 0; |
| return ret; |
| } |
| |
| static void intel_ring_context_unpin(struct i915_gem_context *ctx, |
| struct intel_engine_cs *engine) |
| { |
| struct intel_context *ce = &ctx->engine[engine->id]; |
| |
| lockdep_assert_held(&ctx->i915->dev->struct_mutex); |
| |
| if (--ce->pin_count) |
| return; |
| |
| if (ce->state) |
| i915_gem_object_ggtt_unpin(ce->state); |
| |
| i915_gem_context_unreference(ctx); |
| } |
| |
| static int intel_init_ring_buffer(struct drm_device *dev, |
| struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = to_i915(dev); |
| struct intel_ringbuffer *ringbuf; |
| int ret; |
| |
| WARN_ON(engine->buffer); |
| |
| engine->i915 = dev_priv; |
| INIT_LIST_HEAD(&engine->active_list); |
| INIT_LIST_HEAD(&engine->request_list); |
| INIT_LIST_HEAD(&engine->execlist_queue); |
| INIT_LIST_HEAD(&engine->buffers); |
| i915_gem_batch_pool_init(dev, &engine->batch_pool); |
| memset(engine->semaphore.sync_seqno, 0, |
| sizeof(engine->semaphore.sync_seqno)); |
| |
| init_waitqueue_head(&engine->irq_queue); |
| |
| /* We may need to do things with the shrinker which |
| * require us to immediately switch back to the default |
| * context. This can cause a problem as pinning the |
| * default context also requires GTT space which may not |
| * be available. To avoid this we always pin the default |
| * context. |
| */ |
| ret = intel_ring_context_pin(dev_priv->kernel_context, engine); |
| if (ret) |
| goto error; |
| |
| ringbuf = intel_engine_create_ringbuffer(engine, 32 * PAGE_SIZE); |
| if (IS_ERR(ringbuf)) { |
| ret = PTR_ERR(ringbuf); |
| goto error; |
| } |
| engine->buffer = ringbuf; |
| |
| if (I915_NEED_GFX_HWS(dev_priv)) { |
| ret = init_status_page(engine); |
| if (ret) |
| goto error; |
| } else { |
| WARN_ON(engine->id != RCS); |
| ret = init_phys_status_page(engine); |
| if (ret) |
| goto error; |
| } |
| |
| ret = intel_pin_and_map_ringbuffer_obj(dev_priv, ringbuf); |
| if (ret) { |
| DRM_ERROR("Failed to pin and map ringbuffer %s: %d\n", |
| engine->name, ret); |
| intel_destroy_ringbuffer_obj(ringbuf); |
| goto error; |
| } |
| |
| ret = i915_cmd_parser_init_ring(engine); |
| if (ret) |
| goto error; |
| |
| return 0; |
| |
| error: |
| intel_cleanup_engine(engine); |
| return ret; |
| } |
| |
| void intel_cleanup_engine(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv; |
| |
| if (!intel_engine_initialized(engine)) |
| return; |
| |
| dev_priv = engine->i915; |
| |
| if (engine->buffer) { |
| intel_stop_engine(engine); |
| WARN_ON(!IS_GEN2(dev_priv) && (I915_READ_MODE(engine) & MODE_IDLE) == 0); |
| |
| intel_unpin_ringbuffer_obj(engine->buffer); |
| intel_ringbuffer_free(engine->buffer); |
| engine->buffer = NULL; |
| } |
| |
| if (engine->cleanup) |
| engine->cleanup(engine); |
| |
| if (I915_NEED_GFX_HWS(dev_priv)) { |
| cleanup_status_page(engine); |
| } else { |
| WARN_ON(engine->id != RCS); |
| cleanup_phys_status_page(engine); |
| } |
| |
| i915_cmd_parser_fini_ring(engine); |
| i915_gem_batch_pool_fini(&engine->batch_pool); |
| |
| intel_ring_context_unpin(dev_priv->kernel_context, engine); |
| |
| engine->i915 = NULL; |
| } |
| |
| int intel_engine_idle(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_gem_request *req; |
| |
| /* Wait upon the last request to be completed */ |
| if (list_empty(&engine->request_list)) |
| return 0; |
| |
| req = list_entry(engine->request_list.prev, |
| struct drm_i915_gem_request, |
| list); |
| |
| /* Make sure we do not trigger any retires */ |
| return __i915_wait_request(req, |
| req->i915->mm.interruptible, |
| NULL, NULL); |
| } |
| |
| int intel_ring_alloc_request_extras(struct drm_i915_gem_request *request) |
| { |
| int ret; |
| |
| /* Flush enough space to reduce the likelihood of waiting after |
| * we start building the request - in which case we will just |
| * have to repeat work. |
| */ |
| request->reserved_space += LEGACY_REQUEST_SIZE; |
| |
| request->ringbuf = request->engine->buffer; |
| |
| ret = intel_ring_begin(request, 0); |
| if (ret) |
| return ret; |
| |
| request->reserved_space -= LEGACY_REQUEST_SIZE; |
| return 0; |
| } |
| |
| static int wait_for_space(struct drm_i915_gem_request *req, int bytes) |
| { |
| struct intel_ringbuffer *ringbuf = req->ringbuf; |
| struct intel_engine_cs *engine = req->engine; |
| struct drm_i915_gem_request *target; |
| |
| intel_ring_update_space(ringbuf); |
| if (ringbuf->space >= bytes) |
| return 0; |
| |
| /* |
| * Space is reserved in the ringbuffer for finalising the request, |
| * as that cannot be allowed to fail. During request finalisation, |
| * reserved_space is set to 0 to stop the overallocation and the |
| * assumption is that then we never need to wait (which has the |
| * risk of failing with EINTR). |
| * |
| * See also i915_gem_request_alloc() and i915_add_request(). |
| */ |
| GEM_BUG_ON(!req->reserved_space); |
| |
| list_for_each_entry(target, &engine->request_list, list) { |
| unsigned space; |
| |
| /* |
| * The request queue is per-engine, so can contain requests |
| * from multiple ringbuffers. Here, we must ignore any that |
| * aren't from the ringbuffer we're considering. |
| */ |
| if (target->ringbuf != ringbuf) |
| continue; |
| |
| /* Would completion of this request free enough space? */ |
| space = __intel_ring_space(target->postfix, ringbuf->tail, |
| ringbuf->size); |
| if (space >= bytes) |
| break; |
| } |
| |
| if (WARN_ON(&target->list == &engine->request_list)) |
| return -ENOSPC; |
| |
| return i915_wait_request(target); |
| } |
| |
| int intel_ring_begin(struct drm_i915_gem_request *req, int num_dwords) |
| { |
| struct intel_ringbuffer *ringbuf = req->ringbuf; |
| int remain_actual = ringbuf->size - ringbuf->tail; |
| int remain_usable = ringbuf->effective_size - ringbuf->tail; |
| int bytes = num_dwords * sizeof(u32); |
| int total_bytes, wait_bytes; |
| bool need_wrap = false; |
| |
| total_bytes = bytes + req->reserved_space; |
| |
| if (unlikely(bytes > remain_usable)) { |
| /* |
| * Not enough space for the basic request. So need to flush |
| * out the remainder and then wait for base + reserved. |
| */ |
| wait_bytes = remain_actual + total_bytes; |
| need_wrap = true; |
| } else if (unlikely(total_bytes > remain_usable)) { |
| /* |
| * The base request will fit but the reserved space |
| * falls off the end. So we don't need an immediate wrap |
| * and only need to effectively wait for the reserved |
| * size space from the start of ringbuffer. |
| */ |
| wait_bytes = remain_actual + req->reserved_space; |
| } else { |
| /* No wrapping required, just waiting. */ |
| wait_bytes = total_bytes; |
| } |
| |
| if (wait_bytes > ringbuf->space) { |
| int ret = wait_for_space(req, wait_bytes); |
| if (unlikely(ret)) |
| return ret; |
| |
| intel_ring_update_space(ringbuf); |
| if (unlikely(ringbuf->space < wait_bytes)) |
| return -EAGAIN; |
| } |
| |
| if (unlikely(need_wrap)) { |
| GEM_BUG_ON(remain_actual > ringbuf->space); |
| GEM_BUG_ON(ringbuf->tail + remain_actual > ringbuf->size); |
| |
| /* Fill the tail with MI_NOOP */ |
| memset(ringbuf->virtual_start + ringbuf->tail, |
| 0, remain_actual); |
| ringbuf->tail = 0; |
| ringbuf->space -= remain_actual; |
| } |
| |
| ringbuf->space -= bytes; |
| GEM_BUG_ON(ringbuf->space < 0); |
| return 0; |
| } |
| |
| /* Align the ring tail to a cacheline boundary */ |
| int intel_ring_cacheline_align(struct drm_i915_gem_request *req) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| int num_dwords = (engine->buffer->tail & (CACHELINE_BYTES - 1)) / sizeof(uint32_t); |
| int ret; |
| |
| if (num_dwords == 0) |
| return 0; |
| |
| num_dwords = CACHELINE_BYTES / sizeof(uint32_t) - num_dwords; |
| ret = intel_ring_begin(req, num_dwords); |
| if (ret) |
| return ret; |
| |
| while (num_dwords--) |
| intel_ring_emit(engine, MI_NOOP); |
| |
| intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| void intel_ring_init_seqno(struct intel_engine_cs *engine, u32 seqno) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| /* Our semaphore implementation is strictly monotonic (i.e. we proceed |
| * so long as the semaphore value in the register/page is greater |
| * than the sync value), so whenever we reset the seqno, |
| * so long as we reset the tracking semaphore value to 0, it will |
| * always be before the next request's seqno. If we don't reset |
| * the semaphore value, then when the seqno moves backwards all |
| * future waits will complete instantly (causing rendering corruption). |
| */ |
| if (IS_GEN6(dev_priv) || IS_GEN7(dev_priv)) { |
| I915_WRITE(RING_SYNC_0(engine->mmio_base), 0); |
| I915_WRITE(RING_SYNC_1(engine->mmio_base), 0); |
| if (HAS_VEBOX(dev_priv)) |
| I915_WRITE(RING_SYNC_2(engine->mmio_base), 0); |
| } |
| if (dev_priv->semaphore_obj) { |
| struct drm_i915_gem_object *obj = dev_priv->semaphore_obj; |
| struct page *page = i915_gem_object_get_dirty_page(obj, 0); |
| void *semaphores = kmap(page); |
| memset(semaphores + GEN8_SEMAPHORE_OFFSET(engine->id, 0), |
| 0, I915_NUM_ENGINES * gen8_semaphore_seqno_size); |
| kunmap(page); |
| } |
| memset(engine->semaphore.sync_seqno, 0, |
| sizeof(engine->semaphore.sync_seqno)); |
| |
| engine->set_seqno(engine, seqno); |
| engine->last_submitted_seqno = seqno; |
| |
| engine->hangcheck.seqno = seqno; |
| } |
| |
| static void gen6_bsd_ring_write_tail(struct intel_engine_cs *engine, |
| u32 value) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL); |
| |
| /* Every tail move must follow the sequence below */ |
| |
| /* Disable notification that the ring is IDLE. The GT |
| * will then assume that it is busy and bring it out of rc6. |
| */ |
| I915_WRITE_FW(GEN6_BSD_SLEEP_PSMI_CONTROL, |
| _MASKED_BIT_ENABLE(GEN6_BSD_SLEEP_MSG_DISABLE)); |
| |
| /* Clear the context id. Here be magic! */ |
| I915_WRITE64_FW(GEN6_BSD_RNCID, 0x0); |
| |
| /* Wait for the ring not to be idle, i.e. for it to wake up. */ |
| if (intel_wait_for_register_fw(dev_priv, |
| GEN6_BSD_SLEEP_PSMI_CONTROL, |
| GEN6_BSD_SLEEP_INDICATOR, |
| 0, |
| 50)) |
| DRM_ERROR("timed out waiting for the BSD ring to wake up\n"); |
| |
| /* Now that the ring is fully powered up, update the tail */ |
| I915_WRITE_FW(RING_TAIL(engine->mmio_base), value); |
| POSTING_READ_FW(RING_TAIL(engine->mmio_base)); |
| |
| /* Let the ring send IDLE messages to the GT again, |
| * and so let it sleep to conserve power when idle. |
| */ |
| I915_WRITE_FW(GEN6_BSD_SLEEP_PSMI_CONTROL, |
| _MASKED_BIT_DISABLE(GEN6_BSD_SLEEP_MSG_DISABLE)); |
| |
| intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); |
| } |
| |
| static int gen6_bsd_ring_flush(struct drm_i915_gem_request *req, |
| u32 invalidate, u32 flush) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| uint32_t cmd; |
| int ret; |
| |
| ret = intel_ring_begin(req, 4); |
| if (ret) |
| return ret; |
| |
| cmd = MI_FLUSH_DW; |
| if (INTEL_GEN(req->i915) >= 8) |
| cmd += 1; |
| |
| /* We always require a command barrier so that subsequent |
| * commands, such as breadcrumb interrupts, are strictly ordered |
| * wrt the contents of the write cache being flushed to memory |
| * (and thus being coherent from the CPU). |
| */ |
| cmd |= MI_FLUSH_DW_STORE_INDEX | MI_FLUSH_DW_OP_STOREDW; |
| |
| /* |
| * Bspec vol 1c.5 - video engine command streamer: |
| * "If ENABLED, all TLBs will be invalidated once the flush |
| * operation is complete. This bit is only valid when the |
| * Post-Sync Operation field is a value of 1h or 3h." |
| */ |
| if (invalidate & I915_GEM_GPU_DOMAINS) |
| cmd |= MI_INVALIDATE_TLB | MI_INVALIDATE_BSD; |
| |
| intel_ring_emit(engine, cmd); |
| intel_ring_emit(engine, |
| I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT); |
| if (INTEL_GEN(req->i915) >= 8) { |
| intel_ring_emit(engine, 0); /* upper addr */ |
| intel_ring_emit(engine, 0); /* value */ |
| } else { |
| intel_ring_emit(engine, 0); |
| intel_ring_emit(engine, MI_NOOP); |
| } |
| intel_ring_advance(engine); |
| return 0; |
| } |
| |
| static int |
| gen8_ring_dispatch_execbuffer(struct drm_i915_gem_request *req, |
| u64 offset, u32 len, |
| unsigned dispatch_flags) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| bool ppgtt = USES_PPGTT(engine->dev) && |
| !(dispatch_flags & I915_DISPATCH_SECURE); |
| int ret; |
| |
| ret = intel_ring_begin(req, 4); |
| if (ret) |
| return ret; |
| |
| /* FIXME(BDW): Address space and security selectors. */ |
| intel_ring_emit(engine, MI_BATCH_BUFFER_START_GEN8 | (ppgtt<<8) | |
| (dispatch_flags & I915_DISPATCH_RS ? |
| MI_BATCH_RESOURCE_STREAMER : 0)); |
| intel_ring_emit(engine, lower_32_bits(offset)); |
| intel_ring_emit(engine, upper_32_bits(offset)); |
| intel_ring_emit(engine, MI_NOOP); |
| intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| static int |
| hsw_ring_dispatch_execbuffer(struct drm_i915_gem_request *req, |
| u64 offset, u32 len, |
| unsigned dispatch_flags) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| int ret; |
| |
| ret = intel_ring_begin(req, 2); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, |
| MI_BATCH_BUFFER_START | |
| (dispatch_flags & I915_DISPATCH_SECURE ? |
| 0 : MI_BATCH_PPGTT_HSW | MI_BATCH_NON_SECURE_HSW) | |
| (dispatch_flags & I915_DISPATCH_RS ? |
| MI_BATCH_RESOURCE_STREAMER : 0)); |
| /* bit0-7 is the length on GEN6+ */ |
| intel_ring_emit(engine, offset); |
| intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| static int |
| gen6_ring_dispatch_execbuffer(struct drm_i915_gem_request *req, |
| u64 offset, u32 len, |
| unsigned dispatch_flags) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| int ret; |
| |
| ret = intel_ring_begin(req, 2); |
| if (ret) |
| return ret; |
| |
| intel_ring_emit(engine, |
| MI_BATCH_BUFFER_START | |
| (dispatch_flags & I915_DISPATCH_SECURE ? |
| 0 : MI_BATCH_NON_SECURE_I965)); |
| /* bit0-7 is the length on GEN6+ */ |
| intel_ring_emit(engine, offset); |
| intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| /* Blitter support (SandyBridge+) */ |
| |
| static int gen6_ring_flush(struct drm_i915_gem_request *req, |
| u32 invalidate, u32 flush) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| uint32_t cmd; |
| int ret; |
| |
| ret = intel_ring_begin(req, 4); |
| if (ret) |
| return ret; |
| |
| cmd = MI_FLUSH_DW; |
| if (INTEL_GEN(req->i915) >= 8) |
| cmd += 1; |
| |
| /* We always require a command barrier so that subsequent |
| * commands, such as breadcrumb interrupts, are strictly ordered |
| * wrt the contents of the write cache being flushed to memory |
| * (and thus being coherent from the CPU). |
| */ |
| cmd |= MI_FLUSH_DW_STORE_INDEX | MI_FLUSH_DW_OP_STOREDW; |
| |
| /* |
| * Bspec vol 1c.3 - blitter engine command streamer: |
| * "If ENABLED, all TLBs will be invalidated once the flush |
| * operation is complete. This bit is only valid when the |
| * Post-Sync Operation field is a value of 1h or 3h." |
| */ |
| if (invalidate & I915_GEM_DOMAIN_RENDER) |
| cmd |= MI_INVALIDATE_TLB; |
| intel_ring_emit(engine, cmd); |
| intel_ring_emit(engine, |
| I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT); |
| if (INTEL_GEN(req->i915) >= 8) { |
| intel_ring_emit(engine, 0); /* upper addr */ |
| intel_ring_emit(engine, 0); /* value */ |
| } else { |
| intel_ring_emit(engine, 0); |
| intel_ring_emit(engine, MI_NOOP); |
| } |
| intel_ring_advance(engine); |
| |
| return 0; |
| } |
| |
| static void intel_ring_init_semaphores(struct drm_i915_private *dev_priv, |
| struct intel_engine_cs *engine) |
| { |
| if (!i915_semaphore_is_enabled(dev_priv)) |
| return; |
| |
| if (INTEL_GEN(dev_priv) >= 8) { |
| engine->semaphore.sync_to = gen8_ring_sync; |
| engine->semaphore.signal = gen8_xcs_signal; |
| GEN8_RING_SEMAPHORE_INIT(engine); |
| } else if (INTEL_GEN(dev_priv) >= 6) { |
| engine->semaphore.sync_to = gen6_ring_sync; |
| engine->semaphore.signal = gen6_signal; |
| } |
| } |
| |
| static void intel_ring_default_vfuncs(struct drm_i915_private *dev_priv, |
| struct intel_engine_cs *engine) |
| { |
| engine->init_hw = init_ring_common; |
| engine->write_tail = ring_write_tail; |
| engine->get_seqno = ring_get_seqno; |
| engine->set_seqno = ring_set_seqno; |
| |
| if (INTEL_GEN(dev_priv) >= 8) { |
| engine->dispatch_execbuffer = gen8_ring_dispatch_execbuffer; |
| engine->add_request = gen6_add_request; |
| engine->irq_seqno_barrier = gen6_seqno_barrier; |
| } else if (INTEL_GEN(dev_priv) >= 6) { |
| engine->dispatch_execbuffer = gen6_ring_dispatch_execbuffer; |
| engine->add_request = gen6_add_request; |
| engine->irq_seqno_barrier = gen6_seqno_barrier; |
| } else { |
| engine->dispatch_execbuffer = i965_dispatch_execbuffer; |
| engine->add_request = i9xx_add_request; |
| } |
| |
| if (INTEL_GEN(dev_priv) >= 8) { |
| engine->irq_get = gen8_ring_get_irq; |
| engine->irq_put = gen8_ring_put_irq; |
| } else if (INTEL_GEN(dev_priv) >= 6) { |
| engine->irq_get = gen6_ring_get_irq; |
| engine->irq_put = gen6_ring_put_irq; |
| } else if (INTEL_GEN(dev_priv) >= 5) { |
| engine->irq_get = gen5_ring_get_irq; |
| engine->irq_put = gen5_ring_put_irq; |
| } else if (INTEL_GEN(dev_priv) >= 3) { |
| engine->irq_get = i9xx_ring_get_irq; |
| engine->irq_put = i9xx_ring_put_irq; |
| } else { |
| engine->irq_get = i8xx_ring_get_irq; |
| engine->irq_put = i8xx_ring_put_irq; |
| } |
| |
| intel_ring_init_semaphores(dev_priv, engine); |
| } |
| |
| int intel_init_render_ring_buffer(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct intel_engine_cs *engine = &dev_priv->engine[RCS]; |
| struct drm_i915_gem_object *obj; |
| int ret; |
| |
| engine->name = "render ring"; |
| engine->id = RCS; |
| engine->exec_id = I915_EXEC_RENDER; |
| engine->hw_id = 0; |
| engine->mmio_base = RENDER_RING_BASE; |
| |
| intel_ring_default_vfuncs(dev_priv, engine); |
| |
| if (INTEL_GEN(dev_priv) >= 8) { |
| if (i915_semaphore_is_enabled(dev_priv)) { |
| obj = i915_gem_object_create(dev, 4096); |
| if (IS_ERR(obj)) { |
| DRM_ERROR("Failed to allocate semaphore bo. Disabling semaphores\n"); |
| i915.semaphores = 0; |
| } else { |
| i915_gem_object_set_cache_level(obj, I915_CACHE_LLC); |
| ret = i915_gem_obj_ggtt_pin(obj, 0, PIN_NONBLOCK); |
| if (ret != 0) { |
| drm_gem_object_unreference(&obj->base); |
| DRM_ERROR("Failed to pin semaphore bo. Disabling semaphores\n"); |
| i915.semaphores = 0; |
| } else |
| dev_priv->semaphore_obj = obj; |
| } |
| } |
| |
| engine->init_context = intel_rcs_ctx_init; |
| engine->add_request = gen8_render_add_request; |
| engine->flush = gen8_render_ring_flush; |
| engine->irq_enable_mask = GT_RENDER_USER_INTERRUPT; |
| if (i915_semaphore_is_enabled(dev_priv)) { |
| WARN_ON(!dev_priv->semaphore_obj); |
| engine->semaphore.signal = gen8_rcs_signal; |
| } |
| } else if (INTEL_GEN(dev_priv) >= 6) { |
| engine->init_context = intel_rcs_ctx_init; |
| engine->flush = gen7_render_ring_flush; |
| if (IS_GEN6(dev_priv)) |
| engine->flush = gen6_render_ring_flush; |
| engine->irq_enable_mask = GT_RENDER_USER_INTERRUPT; |
| if (i915_semaphore_is_enabled(dev_priv)) { |
| /* |
| * The current semaphore is only applied on pre-gen8 |
| * platform. And there is no VCS2 ring on the pre-gen8 |
| * platform. So the semaphore between RCS and VCS2 is |
| * initialized as INVALID. Gen8 will initialize the |
| * sema between VCS2 and RCS later. |
| */ |
| engine->semaphore.mbox.wait[RCS] = MI_SEMAPHORE_SYNC_INVALID; |
| engine->semaphore.mbox.wait[VCS] = MI_SEMAPHORE_SYNC_RV; |
| engine->semaphore.mbox.wait[BCS] = MI_SEMAPHORE_SYNC_RB; |
| engine->semaphore.mbox.wait[VECS] = MI_SEMAPHORE_SYNC_RVE; |
| engine->semaphore.mbox.wait[VCS2] = MI_SEMAPHORE_SYNC_INVALID; |
| engine->semaphore.mbox.signal[RCS] = GEN6_NOSYNC; |
| engine->semaphore.mbox.signal[VCS] = GEN6_VRSYNC; |
| engine->semaphore.mbox.signal[BCS] = GEN6_BRSYNC; |
| engine->semaphore.mbox.signal[VECS] = GEN6_VERSYNC; |
| engine->semaphore.mbox.signal[VCS2] = GEN6_NOSYNC; |
| } |
| } else if (IS_GEN5(dev_priv)) { |
| engine->add_request = pc_render_add_request; |
| engine->flush = gen4_render_ring_flush; |
| engine->get_seqno = pc_render_get_seqno; |
| engine->set_seqno = pc_render_set_seqno; |
| engine->irq_enable_mask = GT_RENDER_USER_INTERRUPT | |
| GT_RENDER_PIPECTL_NOTIFY_INTERRUPT; |
| } else { |
| if (INTEL_GEN(dev_priv) < 4) |
| engine->flush = gen2_render_ring_flush; |
| else |
| engine->flush = gen4_render_ring_flush; |
| engine->irq_enable_mask = I915_USER_INTERRUPT; |
| } |
| |
| if (IS_HASWELL(dev_priv)) |
| engine->dispatch_execbuffer = hsw_ring_dispatch_execbuffer; |
| else if (IS_I830(dev_priv) || IS_845G(dev_priv)) |
| engine->dispatch_execbuffer = i830_dispatch_execbuffer; |
| else if (INTEL_GEN(dev_priv) <= 3) |
| engine->dispatch_execbuffer = i915_dispatch_execbuffer; |
| engine->init_hw = init_render_ring; |
| engine->cleanup = render_ring_cleanup; |
| |
| /* Workaround batchbuffer to combat CS tlb bug. */ |
| if (HAS_BROKEN_CS_TLB(dev_priv)) { |
| obj = i915_gem_object_create(dev, I830_WA_SIZE); |
| if (IS_ERR(obj)) { |
| DRM_ERROR("Failed to allocate batch bo\n"); |
| return PTR_ERR(obj); |
| } |
| |
| ret = i915_gem_obj_ggtt_pin(obj, 0, 0); |
| if (ret != 0) { |
| drm_gem_object_unreference(&obj->base); |
| DRM_ERROR("Failed to ping batch bo\n"); |
| return ret; |
| } |
| |
| engine->scratch.obj = obj; |
| engine->scratch.gtt_offset = i915_gem_obj_ggtt_offset(obj); |
| } |
| |
| ret = intel_init_ring_buffer(dev, engine); |
| if (ret) |
| return ret; |
| |
| if (INTEL_GEN(dev_priv) >= 5) { |
| ret = intel_init_pipe_control(engine); |
| if (ret) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| int intel_init_bsd_ring_buffer(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct intel_engine_cs *engine = &dev_priv->engine[VCS]; |
| |
| engine->name = "bsd ring"; |
| engine->id = VCS; |
| engine->exec_id = I915_EXEC_BSD; |
| engine->hw_id = 1; |
| |
| intel_ring_default_vfuncs(dev_priv, engine); |
| |
| if (INTEL_GEN(dev_priv) >= 6) { |
| engine->mmio_base = GEN6_BSD_RING_BASE; |
| /* gen6 bsd needs a special wa for tail updates */ |
| if (IS_GEN6(dev_priv)) |
| engine->write_tail = gen6_bsd_ring_write_tail; |
| engine->flush = gen6_bsd_ring_flush; |
| if (INTEL_GEN(dev_priv) >= 8) { |
| engine->irq_enable_mask = |
| GT_RENDER_USER_INTERRUPT << GEN8_VCS1_IRQ_SHIFT; |
| } else { |
| engine->irq_enable_mask = GT_BSD_USER_INTERRUPT; |
| if (i915_semaphore_is_enabled(dev_priv)) { |
| engine->semaphore.mbox.wait[RCS] = MI_SEMAPHORE_SYNC_VR; |
| engine->semaphore.mbox.wait[VCS] = MI_SEMAPHORE_SYNC_INVALID; |
| engine->semaphore.mbox.wait[BCS] = MI_SEMAPHORE_SYNC_VB; |
| engine->semaphore.mbox.wait[VECS] = MI_SEMAPHORE_SYNC_VVE; |
| engine->semaphore.mbox.wait[VCS2] = MI_SEMAPHORE_SYNC_INVALID; |
| engine->semaphore.mbox.signal[RCS] = GEN6_RVSYNC; |
| engine->semaphore.mbox.signal[VCS] = GEN6_NOSYNC; |
| engine->semaphore.mbox.signal[BCS] = GEN6_BVSYNC; |
| engine->semaphore.mbox.signal[VECS] = GEN6_VEVSYNC; |
| engine->semaphore.mbox.signal[VCS2] = GEN6_NOSYNC; |
| } |
| } |
| } else { |
| engine->mmio_base = BSD_RING_BASE; |
| engine->flush = bsd_ring_flush; |
| if (IS_GEN5(dev_priv)) { |
| engine->irq_enable_mask = ILK_BSD_USER_INTERRUPT; |
| } else { |
| engine->irq_enable_mask = I915_BSD_USER_INTERRUPT; |
| } |
| } |
| |
| return intel_init_ring_buffer(dev, engine); |
| } |
| |
| /** |
| * Initialize the second BSD ring (eg. Broadwell GT3, Skylake GT3) |
| */ |
| int intel_init_bsd2_ring_buffer(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct intel_engine_cs *engine = &dev_priv->engine[VCS2]; |
| |
| engine->name = "bsd2 ring"; |
| engine->id = VCS2; |
| engine->exec_id = I915_EXEC_BSD; |
| engine->hw_id = 4; |
| engine->mmio_base = GEN8_BSD2_RING_BASE; |
| |
| intel_ring_default_vfuncs(dev_priv, engine); |
| |
| engine->flush = gen6_bsd_ring_flush; |
| engine->irq_enable_mask = |
| GT_RENDER_USER_INTERRUPT << GEN8_VCS2_IRQ_SHIFT; |
| |
| return intel_init_ring_buffer(dev, engine); |
| } |
| |
| int intel_init_blt_ring_buffer(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct intel_engine_cs *engine = &dev_priv->engine[BCS]; |
| |
| engine->name = "blitter ring"; |
| engine->id = BCS; |
| engine->exec_id = I915_EXEC_BLT; |
| engine->hw_id = 2; |
| engine->mmio_base = BLT_RING_BASE; |
| |
| intel_ring_default_vfuncs(dev_priv, engine); |
| |
| engine->flush = gen6_ring_flush; |
| if (INTEL_GEN(dev_priv) >= 8) { |
| engine->irq_enable_mask = |
| GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT; |
| } else { |
| engine->irq_enable_mask = GT_BLT_USER_INTERRUPT; |
| if (i915_semaphore_is_enabled(dev_priv)) { |
| /* |
| * The current semaphore is only applied on pre-gen8 |
| * platform. And there is no VCS2 ring on the pre-gen8 |
| * platform. So the semaphore between BCS and VCS2 is |
| * initialized as INVALID. Gen8 will initialize the |
| * sema between BCS and VCS2 later. |
| */ |
| engine->semaphore.mbox.wait[RCS] = MI_SEMAPHORE_SYNC_BR; |
| engine->semaphore.mbox.wait[VCS] = MI_SEMAPHORE_SYNC_BV; |
| engine->semaphore.mbox.wait[BCS] = MI_SEMAPHORE_SYNC_INVALID; |
| engine->semaphore.mbox.wait[VECS] = MI_SEMAPHORE_SYNC_BVE; |
| engine->semaphore.mbox.wait[VCS2] = MI_SEMAPHORE_SYNC_INVALID; |
| engine->semaphore.mbox.signal[RCS] = GEN6_RBSYNC; |
| engine->semaphore.mbox.signal[VCS] = GEN6_VBSYNC; |
| engine->semaphore.mbox.signal[BCS] = GEN6_NOSYNC; |
| engine->semaphore.mbox.signal[VECS] = GEN6_VEBSYNC; |
| engine->semaphore.mbox.signal[VCS2] = GEN6_NOSYNC; |
| } |
| } |
| |
| return intel_init_ring_buffer(dev, engine); |
| } |
| |
| int intel_init_vebox_ring_buffer(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct intel_engine_cs *engine = &dev_priv->engine[VECS]; |
| |
| engine->name = "video enhancement ring"; |
| engine->id = VECS; |
| engine->exec_id = I915_EXEC_VEBOX; |
| engine->hw_id = 3; |
| engine->mmio_base = VEBOX_RING_BASE; |
| |
| intel_ring_default_vfuncs(dev_priv, engine); |
| |
| engine->flush = gen6_ring_flush; |
| |
| if (INTEL_GEN(dev_priv) >= 8) { |
| engine->irq_enable_mask = |
| GT_RENDER_USER_INTERRUPT << GEN8_VECS_IRQ_SHIFT; |
| } else { |
| engine->irq_enable_mask = PM_VEBOX_USER_INTERRUPT; |
| engine->irq_get = hsw_vebox_get_irq; |
| engine->irq_put = hsw_vebox_put_irq; |
| if (i915_semaphore_is_enabled(dev_priv)) { |
| engine->semaphore.mbox.wait[RCS] = MI_SEMAPHORE_SYNC_VER; |
| engine->semaphore.mbox.wait[VCS] = MI_SEMAPHORE_SYNC_VEV; |
| engine->semaphore.mbox.wait[BCS] = MI_SEMAPHORE_SYNC_VEB; |
| engine->semaphore.mbox.wait[VECS] = MI_SEMAPHORE_SYNC_INVALID; |
| engine->semaphore.mbox.wait[VCS2] = MI_SEMAPHORE_SYNC_INVALID; |
| engine->semaphore.mbox.signal[RCS] = GEN6_RVESYNC; |
| engine->semaphore.mbox.signal[VCS] = GEN6_VVESYNC; |
| engine->semaphore.mbox.signal[BCS] = GEN6_BVESYNC; |
| engine->semaphore.mbox.signal[VECS] = GEN6_NOSYNC; |
| engine->semaphore.mbox.signal[VCS2] = GEN6_NOSYNC; |
| } |
| } |
| |
| return intel_init_ring_buffer(dev, engine); |
| } |
| |
| int |
| intel_ring_flush_all_caches(struct drm_i915_gem_request *req) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| int ret; |
| |
| if (!engine->gpu_caches_dirty) |
| return 0; |
| |
| ret = engine->flush(req, 0, I915_GEM_GPU_DOMAINS); |
| if (ret) |
| return ret; |
| |
| trace_i915_gem_ring_flush(req, 0, I915_GEM_GPU_DOMAINS); |
| |
| engine->gpu_caches_dirty = false; |
| return 0; |
| } |
| |
| int |
| intel_ring_invalidate_all_caches(struct drm_i915_gem_request *req) |
| { |
| struct intel_engine_cs *engine = req->engine; |
| uint32_t flush_domains; |
| int ret; |
| |
| flush_domains = 0; |
| if (engine->gpu_caches_dirty) |
| flush_domains = I915_GEM_GPU_DOMAINS; |
| |
| ret = engine->flush(req, I915_GEM_GPU_DOMAINS, flush_domains); |
| if (ret) |
| return ret; |
| |
| trace_i915_gem_ring_flush(req, I915_GEM_GPU_DOMAINS, flush_domains); |
| |
| engine->gpu_caches_dirty = false; |
| return 0; |
| } |
| |
| void |
| intel_stop_engine(struct intel_engine_cs *engine) |
| { |
| int ret; |
| |
| if (!intel_engine_initialized(engine)) |
| return; |
| |
| ret = intel_engine_idle(engine); |
| if (ret) |
| DRM_ERROR("failed to quiesce %s whilst cleaning up: %d\n", |
| engine->name, ret); |
| |
| stop_ring(engine); |
| } |