| /* |
| * 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 <drm/i915_drm.h> |
| |
| #include "i915_drv.h" |
| #include "i915_gem_render_state.h" |
| #include "i915_trace.h" |
| #include "intel_drv.h" |
| #include "intel_workarounds.h" |
| |
| /* Rough estimate of the typical request size, performing a flush, |
| * set-context and then emitting the batch. |
| */ |
| #define LEGACY_REQUEST_SIZE 200 |
| |
| static unsigned int __intel_ring_space(unsigned int head, |
| unsigned int tail, |
| unsigned int size) |
| { |
| /* |
| * "If the Ring Buffer Head Pointer and the Tail Pointer are on the |
| * same cacheline, the Head Pointer must not be greater than the Tail |
| * Pointer." |
| */ |
| GEM_BUG_ON(!is_power_of_2(size)); |
| return (head - tail - CACHELINE_BYTES) & (size - 1); |
| } |
| |
| unsigned int intel_ring_update_space(struct intel_ring *ring) |
| { |
| unsigned int space; |
| |
| space = __intel_ring_space(ring->head, ring->emit, ring->size); |
| |
| ring->space = space; |
| return space; |
| } |
| |
| static int |
| gen2_render_ring_flush(struct i915_request *rq, u32 mode) |
| { |
| unsigned int num_store_dw; |
| u32 cmd, *cs; |
| |
| cmd = MI_FLUSH; |
| num_store_dw = 0; |
| if (mode & EMIT_INVALIDATE) |
| cmd |= MI_READ_FLUSH; |
| if (mode & EMIT_FLUSH) |
| num_store_dw = 4; |
| |
| cs = intel_ring_begin(rq, 2 + 3 * num_store_dw); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| *cs++ = cmd; |
| while (num_store_dw--) { |
| *cs++ = MI_STORE_DWORD_IMM | MI_MEM_VIRTUAL; |
| *cs++ = i915_scratch_offset(rq->i915); |
| *cs++ = 0; |
| } |
| *cs++ = MI_FLUSH | MI_NO_WRITE_FLUSH; |
| |
| intel_ring_advance(rq, cs); |
| |
| return 0; |
| } |
| |
| static int |
| gen4_render_ring_flush(struct i915_request *rq, u32 mode) |
| { |
| u32 cmd, *cs; |
| int i; |
| |
| /* |
| * 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; |
| if (mode & EMIT_INVALIDATE) { |
| cmd |= MI_EXE_FLUSH; |
| if (IS_G4X(rq->i915) || IS_GEN5(rq->i915)) |
| cmd |= MI_INVALIDATE_ISP; |
| } |
| |
| i = 2; |
| if (mode & EMIT_INVALIDATE) |
| i += 20; |
| |
| cs = intel_ring_begin(rq, i); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| *cs++ = cmd; |
| |
| /* |
| * A random delay to let the CS invalidate take effect? Without this |
| * delay, the GPU relocation path fails as the CS does not see |
| * the updated contents. Just as important, if we apply the flushes |
| * to the EMIT_FLUSH branch (i.e. immediately after the relocation |
| * write and before the invalidate on the next batch), the relocations |
| * still fail. This implies that is a delay following invalidation |
| * that is required to reset the caches as opposed to a delay to |
| * ensure the memory is written. |
| */ |
| if (mode & EMIT_INVALIDATE) { |
| *cs++ = GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE; |
| *cs++ = i915_scratch_offset(rq->i915) | PIPE_CONTROL_GLOBAL_GTT; |
| *cs++ = 0; |
| *cs++ = 0; |
| |
| for (i = 0; i < 12; i++) |
| *cs++ = MI_FLUSH; |
| |
| *cs++ = GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE; |
| *cs++ = i915_scratch_offset(rq->i915) | PIPE_CONTROL_GLOBAL_GTT; |
| *cs++ = 0; |
| *cs++ = 0; |
| } |
| |
| *cs++ = cmd; |
| |
| intel_ring_advance(rq, cs); |
| |
| 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 i915_request *rq) |
| { |
| u32 scratch_addr = i915_scratch_offset(rq->i915) + 2 * CACHELINE_BYTES; |
| u32 *cs; |
| |
| cs = intel_ring_begin(rq, 6); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| *cs++ = GFX_OP_PIPE_CONTROL(5); |
| *cs++ = PIPE_CONTROL_CS_STALL | PIPE_CONTROL_STALL_AT_SCOREBOARD; |
| *cs++ = scratch_addr | PIPE_CONTROL_GLOBAL_GTT; |
| *cs++ = 0; /* low dword */ |
| *cs++ = 0; /* high dword */ |
| *cs++ = MI_NOOP; |
| intel_ring_advance(rq, cs); |
| |
| cs = intel_ring_begin(rq, 6); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| *cs++ = GFX_OP_PIPE_CONTROL(5); |
| *cs++ = PIPE_CONTROL_QW_WRITE; |
| *cs++ = scratch_addr | PIPE_CONTROL_GLOBAL_GTT; |
| *cs++ = 0; |
| *cs++ = 0; |
| *cs++ = MI_NOOP; |
| intel_ring_advance(rq, cs); |
| |
| return 0; |
| } |
| |
| static int |
| gen6_render_ring_flush(struct i915_request *rq, u32 mode) |
| { |
| u32 scratch_addr = i915_scratch_offset(rq->i915) + 2 * CACHELINE_BYTES; |
| u32 *cs, flags = 0; |
| int ret; |
| |
| /* Force SNB workarounds for PIPE_CONTROL flushes */ |
| ret = intel_emit_post_sync_nonzero_flush(rq); |
| 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 (mode & EMIT_FLUSH) { |
| 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 (mode & EMIT_INVALIDATE) { |
| 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; |
| } |
| |
| cs = intel_ring_begin(rq, 4); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| *cs++ = GFX_OP_PIPE_CONTROL(4); |
| *cs++ = flags; |
| *cs++ = scratch_addr | PIPE_CONTROL_GLOBAL_GTT; |
| *cs++ = 0; |
| intel_ring_advance(rq, cs); |
| |
| return 0; |
| } |
| |
| static int |
| gen7_render_ring_cs_stall_wa(struct i915_request *rq) |
| { |
| u32 *cs; |
| |
| cs = intel_ring_begin(rq, 4); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| *cs++ = GFX_OP_PIPE_CONTROL(4); |
| *cs++ = PIPE_CONTROL_CS_STALL | PIPE_CONTROL_STALL_AT_SCOREBOARD; |
| *cs++ = 0; |
| *cs++ = 0; |
| intel_ring_advance(rq, cs); |
| |
| return 0; |
| } |
| |
| static int |
| gen7_render_ring_flush(struct i915_request *rq, u32 mode) |
| { |
| u32 scratch_addr = i915_scratch_offset(rq->i915) + 2 * CACHELINE_BYTES; |
| u32 *cs, flags = 0; |
| |
| /* |
| * 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 (mode & EMIT_FLUSH) { |
| 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 (mode & EMIT_INVALIDATE) { |
| 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(rq); |
| } |
| |
| cs = intel_ring_begin(rq, 4); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| *cs++ = GFX_OP_PIPE_CONTROL(4); |
| *cs++ = flags; |
| *cs++ = scratch_addr; |
| *cs++ = 0; |
| intel_ring_advance(rq, cs); |
| |
| return 0; |
| } |
| |
| static void ring_setup_phys_status_page(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| struct page *page = virt_to_page(engine->status_page.page_addr); |
| phys_addr_t phys = PFN_PHYS(page_to_pfn(page)); |
| u32 addr; |
| |
| addr = lower_32_bits(phys); |
| if (INTEL_GEN(dev_priv) >= 4) |
| addr |= (phys >> 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) { |
| /* |
| * No more rings exist on Gen7. Default case is only to shut up |
| * gcc switch check warning. |
| */ |
| default: |
| GEM_BUG_ON(engine->id); |
| case RCS: |
| mmio = RENDER_HWS_PGA_GEN7; |
| break; |
| case BCS: |
| mmio = BLT_HWS_PGA_GEN7; |
| break; |
| 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 { |
| mmio = RING_HWS_PGA(engine->mmio_base); |
| } |
| |
| if (INTEL_GEN(dev_priv) >= 6) { |
| u32 mask = ~0u; |
| |
| /* |
| * Keep the render interrupt unmasked as this papers over |
| * lost interrupts following a reset. |
| */ |
| if (engine->id == RCS) |
| mask &= ~BIT(0); |
| |
| I915_WRITE(RING_HWSTAM(engine->mmio_base), mask); |
| } |
| |
| I915_WRITE(mmio, engine->status_page.ggtt_offset); |
| POSTING_READ(mmio); |
| |
| /* Flush the TLB for this page */ |
| 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 (INTEL_GEN(dev_priv) > 2) { |
| 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_HEAD(engine, I915_READ_TAIL(engine)); |
| |
| I915_WRITE_HEAD(engine, 0); |
| I915_WRITE_TAIL(engine, 0); |
| |
| /* The ring must be empty before it is disabled */ |
| I915_WRITE_CTL(engine, 0); |
| |
| return (I915_READ_HEAD(engine) & HEAD_ADDR) == 0; |
| } |
| |
| static int init_ring_common(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| struct intel_ring *ring = engine->buffer; |
| 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_DRIVER("%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 (HWS_NEEDS_PHYSICAL(dev_priv)) |
| ring_setup_phys_status_page(engine); |
| else |
| intel_ring_setup_status_page(engine); |
| |
| intel_engine_reset_breadcrumbs(engine); |
| |
| if (HAS_LEGACY_SEMAPHORES(engine->i915)) { |
| 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); |
| } |
| |
| /* 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_ggtt_offset(ring->vma)); |
| |
| /* WaClearRingBufHeadRegAtInit:ctg,elk */ |
| if (I915_READ_HEAD(engine)) |
| DRM_DEBUG_DRIVER("%s initialization failed [head=%08x], fudging\n", |
| engine->name, I915_READ_HEAD(engine)); |
| |
| /* Check that the ring offsets point within the ring! */ |
| GEM_BUG_ON(!intel_ring_offset_valid(ring, ring->head)); |
| GEM_BUG_ON(!intel_ring_offset_valid(ring, ring->tail)); |
| intel_ring_update_space(ring); |
| |
| /* First wake the ring up to an empty/idle ring */ |
| I915_WRITE_HEAD(engine, ring->head); |
| I915_WRITE_TAIL(engine, ring->head); |
| (void)I915_READ_TAIL(engine); |
| |
| I915_WRITE_CTL(engine, RING_CTL_SIZE(ring->size) | RING_VALID); |
| |
| /* If the head is still not zero, the ring is dead */ |
| if (intel_wait_for_register(dev_priv, RING_CTL(engine->mmio_base), |
| RING_VALID, RING_VALID, |
| 50)) { |
| DRM_ERROR("%s initialization failed " |
| "ctl %08x (valid? %d) head %08x [%08x] tail %08x [%08x] start %08x [expected %08x]\n", |
| engine->name, |
| I915_READ_CTL(engine), |
| I915_READ_CTL(engine) & RING_VALID, |
| I915_READ_HEAD(engine), ring->head, |
| I915_READ_TAIL(engine), ring->tail, |
| I915_READ_START(engine), |
| i915_ggtt_offset(ring->vma)); |
| ret = -EIO; |
| goto out; |
| } |
| |
| if (INTEL_GEN(dev_priv) > 2) |
| I915_WRITE_MODE(engine, _MASKED_BIT_DISABLE(STOP_RING)); |
| |
| /* Now awake, let it get started */ |
| if (ring->tail != ring->head) { |
| I915_WRITE_TAIL(engine, ring->tail); |
| (void)I915_READ_TAIL(engine); |
| } |
| |
| /* Papering over lost _interrupts_ immediately following the restart */ |
| intel_engine_wakeup(engine); |
| out: |
| intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); |
| |
| return ret; |
| } |
| |
| static struct i915_request *reset_prepare(struct intel_engine_cs *engine) |
| { |
| intel_engine_stop_cs(engine); |
| |
| if (engine->irq_seqno_barrier) |
| engine->irq_seqno_barrier(engine); |
| |
| return i915_gem_find_active_request(engine); |
| } |
| |
| static void skip_request(struct i915_request *rq) |
| { |
| void *vaddr = rq->ring->vaddr; |
| u32 head; |
| |
| head = rq->infix; |
| if (rq->postfix < head) { |
| memset32(vaddr + head, MI_NOOP, |
| (rq->ring->size - head) / sizeof(u32)); |
| head = 0; |
| } |
| memset32(vaddr + head, MI_NOOP, (rq->postfix - head) / sizeof(u32)); |
| } |
| |
| static void reset_ring(struct intel_engine_cs *engine, struct i915_request *rq) |
| { |
| GEM_TRACE("%s request global=%d, current=%d\n", |
| engine->name, rq ? rq->global_seqno : 0, |
| intel_engine_get_seqno(engine)); |
| |
| /* |
| * Try to restore the logical GPU state to match the continuation |
| * of the request queue. If we skip the context/PD restore, then |
| * the next request may try to execute assuming that its context |
| * is valid and loaded on the GPU and so may try to access invalid |
| * memory, prompting repeated GPU hangs. |
| * |
| * If the request was guilty, we still restore the logical state |
| * in case the next request requires it (e.g. the aliasing ppgtt), |
| * but skip over the hung batch. |
| * |
| * If the request was innocent, we try to replay the request with |
| * the restored context. |
| */ |
| if (rq) { |
| /* If the rq hung, jump to its breadcrumb and skip the batch */ |
| rq->ring->head = intel_ring_wrap(rq->ring, rq->head); |
| if (rq->fence.error == -EIO) |
| skip_request(rq); |
| } |
| } |
| |
| static void reset_finish(struct intel_engine_cs *engine) |
| { |
| } |
| |
| static int intel_rcs_ctx_init(struct i915_request *rq) |
| { |
| int ret; |
| |
| ret = intel_engine_emit_ctx_wa(rq); |
| if (ret != 0) |
| return ret; |
| |
| ret = i915_gem_render_state_emit(rq); |
| if (ret) |
| return ret; |
| |
| 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 (INTEL_GEN(dev_priv) >= 6) |
| I915_WRITE_IMR(engine, ~engine->irq_keep_mask); |
| |
| return 0; |
| } |
| |
| static u32 *gen6_signal(struct i915_request *rq, u32 *cs) |
| { |
| struct drm_i915_private *dev_priv = rq->i915; |
| struct intel_engine_cs *engine; |
| enum intel_engine_id id; |
| int num_rings = 0; |
| |
| for_each_engine(engine, dev_priv, id) { |
| i915_reg_t mbox_reg; |
| |
| if (!(BIT(engine->hw_id) & GEN6_SEMAPHORES_MASK)) |
| continue; |
| |
| mbox_reg = rq->engine->semaphore.mbox.signal[engine->hw_id]; |
| if (i915_mmio_reg_valid(mbox_reg)) { |
| *cs++ = MI_LOAD_REGISTER_IMM(1); |
| *cs++ = i915_mmio_reg_offset(mbox_reg); |
| *cs++ = rq->global_seqno; |
| num_rings++; |
| } |
| } |
| if (num_rings & 1) |
| *cs++ = MI_NOOP; |
| |
| return cs; |
| } |
| |
| static void cancel_requests(struct intel_engine_cs *engine) |
| { |
| struct i915_request *request; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&engine->timeline.lock, flags); |
| |
| /* Mark all submitted requests as skipped. */ |
| list_for_each_entry(request, &engine->timeline.requests, link) { |
| GEM_BUG_ON(!request->global_seqno); |
| |
| if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, |
| &request->fence.flags)) |
| continue; |
| |
| dma_fence_set_error(&request->fence, -EIO); |
| } |
| |
| intel_write_status_page(engine, |
| I915_GEM_HWS_INDEX, |
| intel_engine_last_submit(engine)); |
| |
| /* Remaining _unready_ requests will be nop'ed when submitted */ |
| |
| spin_unlock_irqrestore(&engine->timeline.lock, flags); |
| } |
| |
| static void i9xx_submit_request(struct i915_request *request) |
| { |
| struct drm_i915_private *dev_priv = request->i915; |
| |
| i915_request_submit(request); |
| |
| I915_WRITE_TAIL(request->engine, |
| intel_ring_set_tail(request->ring, request->tail)); |
| } |
| |
| static void i9xx_emit_breadcrumb(struct i915_request *rq, u32 *cs) |
| { |
| *cs++ = MI_STORE_DWORD_INDEX; |
| *cs++ = I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT; |
| *cs++ = rq->global_seqno; |
| *cs++ = MI_USER_INTERRUPT; |
| |
| rq->tail = intel_ring_offset(rq, cs); |
| assert_ring_tail_valid(rq->ring, rq->tail); |
| } |
| |
| static const int i9xx_emit_breadcrumb_sz = 4; |
| |
| static void gen6_sema_emit_breadcrumb(struct i915_request *rq, u32 *cs) |
| { |
| return i9xx_emit_breadcrumb(rq, rq->engine->semaphore.signal(rq, cs)); |
| } |
| |
| static int |
| gen6_ring_sync_to(struct i915_request *rq, struct i915_request *signal) |
| { |
| u32 dw1 = MI_SEMAPHORE_MBOX | |
| MI_SEMAPHORE_COMPARE | |
| MI_SEMAPHORE_REGISTER; |
| u32 wait_mbox = signal->engine->semaphore.mbox.wait[rq->engine->hw_id]; |
| u32 *cs; |
| |
| WARN_ON(wait_mbox == MI_SEMAPHORE_SYNC_INVALID); |
| |
| cs = intel_ring_begin(rq, 4); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| *cs++ = dw1 | wait_mbox; |
| /* 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. |
| */ |
| *cs++ = signal->global_seqno - 1; |
| *cs++ = 0; |
| *cs++ = MI_NOOP; |
| intel_ring_advance(rq, cs); |
| |
| return 0; |
| } |
| |
| static void |
| gen5_seqno_barrier(struct intel_engine_cs *engine) |
| { |
| /* MI_STORE are internally buffered by the GPU and not flushed |
| * either by MI_FLUSH or SyncFlush or any other combination of |
| * MI commands. |
| * |
| * "Only the submission of the store operation is guaranteed. |
| * The write result will be complete (coherent) some time later |
| * (this is practically a finite period but there is no guaranteed |
| * latency)." |
| * |
| * Empirically, we observe that we need a delay of at least 75us to |
| * be sure that the seqno write is visible by the CPU. |
| */ |
| usleep_range(125, 250); |
| } |
| |
| 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 void |
| gen5_irq_enable(struct intel_engine_cs *engine) |
| { |
| gen5_enable_gt_irq(engine->i915, engine->irq_enable_mask); |
| } |
| |
| static void |
| gen5_irq_disable(struct intel_engine_cs *engine) |
| { |
| gen5_disable_gt_irq(engine->i915, engine->irq_enable_mask); |
| } |
| |
| static void |
| i9xx_irq_enable(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| dev_priv->irq_mask &= ~engine->irq_enable_mask; |
| I915_WRITE(IMR, dev_priv->irq_mask); |
| POSTING_READ_FW(RING_IMR(engine->mmio_base)); |
| } |
| |
| static void |
| i9xx_irq_disable(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| dev_priv->irq_mask |= engine->irq_enable_mask; |
| I915_WRITE(IMR, dev_priv->irq_mask); |
| } |
| |
| static void |
| i8xx_irq_enable(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| dev_priv->irq_mask &= ~engine->irq_enable_mask; |
| I915_WRITE16(IMR, dev_priv->irq_mask); |
| POSTING_READ16(RING_IMR(engine->mmio_base)); |
| } |
| |
| static void |
| i8xx_irq_disable(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| dev_priv->irq_mask |= engine->irq_enable_mask; |
| I915_WRITE16(IMR, dev_priv->irq_mask); |
| } |
| |
| static int |
| bsd_ring_flush(struct i915_request *rq, u32 mode) |
| { |
| u32 *cs; |
| |
| cs = intel_ring_begin(rq, 2); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| *cs++ = MI_FLUSH; |
| *cs++ = MI_NOOP; |
| intel_ring_advance(rq, cs); |
| return 0; |
| } |
| |
| static void |
| gen6_irq_enable(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| I915_WRITE_IMR(engine, |
| ~(engine->irq_enable_mask | |
| engine->irq_keep_mask)); |
| gen5_enable_gt_irq(dev_priv, engine->irq_enable_mask); |
| } |
| |
| static void |
| gen6_irq_disable(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| I915_WRITE_IMR(engine, ~engine->irq_keep_mask); |
| gen5_disable_gt_irq(dev_priv, engine->irq_enable_mask); |
| } |
| |
| static void |
| hsw_vebox_irq_enable(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| I915_WRITE_IMR(engine, ~engine->irq_enable_mask); |
| gen6_unmask_pm_irq(dev_priv, engine->irq_enable_mask); |
| } |
| |
| static void |
| hsw_vebox_irq_disable(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| I915_WRITE_IMR(engine, ~0); |
| gen6_mask_pm_irq(dev_priv, engine->irq_enable_mask); |
| } |
| |
| static int |
| i965_emit_bb_start(struct i915_request *rq, |
| u64 offset, u32 length, |
| unsigned int dispatch_flags) |
| { |
| u32 *cs; |
| |
| cs = intel_ring_begin(rq, 2); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| *cs++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT | (dispatch_flags & |
| I915_DISPATCH_SECURE ? 0 : MI_BATCH_NON_SECURE_I965); |
| *cs++ = offset; |
| intel_ring_advance(rq, cs); |
| |
| return 0; |
| } |
| |
| /* Just userspace ABI convention to limit the wa batch bo to a resonable size */ |
| #define I830_BATCH_LIMIT SZ_256K |
| #define I830_TLB_ENTRIES (2) |
| #define I830_WA_SIZE max(I830_TLB_ENTRIES*4096, I830_BATCH_LIMIT) |
| static int |
| i830_emit_bb_start(struct i915_request *rq, |
| u64 offset, u32 len, |
| unsigned int dispatch_flags) |
| { |
| u32 *cs, cs_offset = i915_scratch_offset(rq->i915); |
| |
| GEM_BUG_ON(rq->i915->gt.scratch->size < I830_WA_SIZE); |
| |
| cs = intel_ring_begin(rq, 6); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| /* Evict the invalid PTE TLBs */ |
| *cs++ = COLOR_BLT_CMD | BLT_WRITE_RGBA; |
| *cs++ = BLT_DEPTH_32 | BLT_ROP_COLOR_COPY | 4096; |
| *cs++ = I830_TLB_ENTRIES << 16 | 4; /* load each page */ |
| *cs++ = cs_offset; |
| *cs++ = 0xdeadbeef; |
| *cs++ = MI_NOOP; |
| intel_ring_advance(rq, cs); |
| |
| if ((dispatch_flags & I915_DISPATCH_PINNED) == 0) { |
| if (len > I830_BATCH_LIMIT) |
| return -ENOSPC; |
| |
| cs = intel_ring_begin(rq, 6 + 2); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| /* 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) ... |
| */ |
| *cs++ = SRC_COPY_BLT_CMD | BLT_WRITE_RGBA; |
| *cs++ = BLT_DEPTH_32 | BLT_ROP_SRC_COPY | 4096; |
| *cs++ = DIV_ROUND_UP(len, 4096) << 16 | 4096; |
| *cs++ = cs_offset; |
| *cs++ = 4096; |
| *cs++ = offset; |
| |
| *cs++ = MI_FLUSH; |
| *cs++ = MI_NOOP; |
| intel_ring_advance(rq, cs); |
| |
| /* ... and execute it. */ |
| offset = cs_offset; |
| } |
| |
| cs = intel_ring_begin(rq, 2); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| *cs++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT; |
| *cs++ = offset | (dispatch_flags & I915_DISPATCH_SECURE ? 0 : |
| MI_BATCH_NON_SECURE); |
| intel_ring_advance(rq, cs); |
| |
| return 0; |
| } |
| |
| static int |
| i915_emit_bb_start(struct i915_request *rq, |
| u64 offset, u32 len, |
| unsigned int dispatch_flags) |
| { |
| u32 *cs; |
| |
| cs = intel_ring_begin(rq, 2); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| *cs++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT; |
| *cs++ = offset | (dispatch_flags & I915_DISPATCH_SECURE ? 0 : |
| MI_BATCH_NON_SECURE); |
| intel_ring_advance(rq, cs); |
| |
| return 0; |
| } |
| |
| int intel_ring_pin(struct intel_ring *ring) |
| { |
| struct i915_vma *vma = ring->vma; |
| enum i915_map_type map = i915_coherent_map_type(vma->vm->i915); |
| unsigned int flags; |
| void *addr; |
| int ret; |
| |
| GEM_BUG_ON(ring->vaddr); |
| |
| flags = PIN_GLOBAL; |
| |
| /* Ring wraparound at offset 0 sometimes hangs. No idea why. */ |
| flags |= PIN_OFFSET_BIAS | i915_ggtt_pin_bias(vma); |
| |
| if (vma->obj->stolen) |
| flags |= PIN_MAPPABLE; |
| else |
| flags |= PIN_HIGH; |
| |
| if (!(vma->flags & I915_VMA_GLOBAL_BIND)) { |
| if (flags & PIN_MAPPABLE || map == I915_MAP_WC) |
| ret = i915_gem_object_set_to_gtt_domain(vma->obj, true); |
| else |
| ret = i915_gem_object_set_to_cpu_domain(vma->obj, true); |
| if (unlikely(ret)) |
| return ret; |
| } |
| |
| ret = i915_vma_pin(vma, 0, 0, flags); |
| if (unlikely(ret)) |
| return ret; |
| |
| if (i915_vma_is_map_and_fenceable(vma)) |
| addr = (void __force *)i915_vma_pin_iomap(vma); |
| else |
| addr = i915_gem_object_pin_map(vma->obj, map); |
| if (IS_ERR(addr)) |
| goto err; |
| |
| vma->obj->pin_global++; |
| |
| ring->vaddr = addr; |
| return 0; |
| |
| err: |
| i915_vma_unpin(vma); |
| return PTR_ERR(addr); |
| } |
| |
| void intel_ring_reset(struct intel_ring *ring, u32 tail) |
| { |
| GEM_BUG_ON(!intel_ring_offset_valid(ring, tail)); |
| |
| ring->tail = tail; |
| ring->head = tail; |
| ring->emit = tail; |
| intel_ring_update_space(ring); |
| } |
| |
| void intel_ring_unpin(struct intel_ring *ring) |
| { |
| GEM_BUG_ON(!ring->vma); |
| GEM_BUG_ON(!ring->vaddr); |
| |
| /* Discard any unused bytes beyond that submitted to hw. */ |
| intel_ring_reset(ring, ring->tail); |
| |
| if (i915_vma_is_map_and_fenceable(ring->vma)) |
| i915_vma_unpin_iomap(ring->vma); |
| else |
| i915_gem_object_unpin_map(ring->vma->obj); |
| ring->vaddr = NULL; |
| |
| ring->vma->obj->pin_global--; |
| i915_vma_unpin(ring->vma); |
| } |
| |
| static struct i915_vma * |
| intel_ring_create_vma(struct drm_i915_private *dev_priv, int size) |
| { |
| struct i915_address_space *vm = &dev_priv->ggtt.vm; |
| struct drm_i915_gem_object *obj; |
| struct i915_vma *vma; |
| |
| obj = i915_gem_object_create_stolen(dev_priv, size); |
| if (!obj) |
| obj = i915_gem_object_create_internal(dev_priv, size); |
| if (IS_ERR(obj)) |
| return ERR_CAST(obj); |
| |
| /* |
| * Mark ring buffers as read-only from GPU side (so no stray overwrites) |
| * if supported by the platform's GGTT. |
| */ |
| if (vm->has_read_only) |
| i915_gem_object_set_readonly(obj); |
| |
| vma = i915_vma_instance(obj, vm, NULL); |
| if (IS_ERR(vma)) |
| goto err; |
| |
| return vma; |
| |
| err: |
| i915_gem_object_put(obj); |
| return vma; |
| } |
| |
| struct intel_ring * |
| intel_engine_create_ring(struct intel_engine_cs *engine, |
| struct i915_timeline *timeline, |
| int size) |
| { |
| struct intel_ring *ring; |
| struct i915_vma *vma; |
| |
| GEM_BUG_ON(!is_power_of_2(size)); |
| GEM_BUG_ON(RING_CTL_SIZE(size) & ~RING_NR_PAGES); |
| GEM_BUG_ON(timeline == &engine->timeline); |
| lockdep_assert_held(&engine->i915->drm.struct_mutex); |
| |
| ring = kzalloc(sizeof(*ring), GFP_KERNEL); |
| if (!ring) |
| return ERR_PTR(-ENOMEM); |
| |
| INIT_LIST_HEAD(&ring->request_list); |
| ring->timeline = i915_timeline_get(timeline); |
| |
| 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_I845G(engine->i915)) |
| ring->effective_size -= 2 * CACHELINE_BYTES; |
| |
| intel_ring_update_space(ring); |
| |
| vma = intel_ring_create_vma(engine->i915, size); |
| if (IS_ERR(vma)) { |
| kfree(ring); |
| return ERR_CAST(vma); |
| } |
| ring->vma = vma; |
| |
| return ring; |
| } |
| |
| void |
| intel_ring_free(struct intel_ring *ring) |
| { |
| struct drm_i915_gem_object *obj = ring->vma->obj; |
| |
| i915_vma_close(ring->vma); |
| __i915_gem_object_release_unless_active(obj); |
| |
| i915_timeline_put(ring->timeline); |
| kfree(ring); |
| } |
| |
| static void intel_ring_context_destroy(struct intel_context *ce) |
| { |
| GEM_BUG_ON(ce->pin_count); |
| |
| if (!ce->state) |
| return; |
| |
| GEM_BUG_ON(i915_gem_object_is_active(ce->state->obj)); |
| i915_gem_object_put(ce->state->obj); |
| } |
| |
| static int __context_pin_ppgtt(struct i915_gem_context *ctx) |
| { |
| struct i915_hw_ppgtt *ppgtt; |
| int err = 0; |
| |
| ppgtt = ctx->ppgtt ?: ctx->i915->mm.aliasing_ppgtt; |
| if (ppgtt) |
| err = gen6_ppgtt_pin(ppgtt); |
| |
| return err; |
| } |
| |
| static void __context_unpin_ppgtt(struct i915_gem_context *ctx) |
| { |
| struct i915_hw_ppgtt *ppgtt; |
| |
| ppgtt = ctx->ppgtt ?: ctx->i915->mm.aliasing_ppgtt; |
| if (ppgtt) |
| gen6_ppgtt_unpin(ppgtt); |
| } |
| |
| static int __context_pin(struct intel_context *ce) |
| { |
| struct i915_vma *vma; |
| int err; |
| |
| vma = ce->state; |
| if (!vma) |
| return 0; |
| |
| /* |
| * Clear this page out of any CPU caches for coherent swap-in/out. |
| * We only want to do this on the first bind so that we do not stall |
| * on an active context (which by nature is already on the GPU). |
| */ |
| if (!(vma->flags & I915_VMA_GLOBAL_BIND)) { |
| err = i915_gem_object_set_to_gtt_domain(vma->obj, true); |
| if (err) |
| return err; |
| } |
| |
| err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL | PIN_HIGH); |
| if (err) |
| return err; |
| |
| /* |
| * And mark is as a globally pinned object to let the shrinker know |
| * it cannot reclaim the object until we release it. |
| */ |
| vma->obj->pin_global++; |
| |
| return 0; |
| } |
| |
| static void __context_unpin(struct intel_context *ce) |
| { |
| struct i915_vma *vma; |
| |
| vma = ce->state; |
| if (!vma) |
| return; |
| |
| vma->obj->pin_global--; |
| i915_vma_unpin(vma); |
| } |
| |
| static void intel_ring_context_unpin(struct intel_context *ce) |
| { |
| __context_unpin_ppgtt(ce->gem_context); |
| __context_unpin(ce); |
| |
| i915_gem_context_put(ce->gem_context); |
| } |
| |
| static struct i915_vma * |
| alloc_context_vma(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *i915 = engine->i915; |
| struct drm_i915_gem_object *obj; |
| struct i915_vma *vma; |
| int err; |
| |
| obj = i915_gem_object_create(i915, engine->context_size); |
| if (IS_ERR(obj)) |
| return ERR_CAST(obj); |
| |
| if (engine->default_state) { |
| void *defaults, *vaddr; |
| |
| vaddr = i915_gem_object_pin_map(obj, I915_MAP_WB); |
| if (IS_ERR(vaddr)) { |
| err = PTR_ERR(vaddr); |
| goto err_obj; |
| } |
| |
| defaults = i915_gem_object_pin_map(engine->default_state, |
| I915_MAP_WB); |
| if (IS_ERR(defaults)) { |
| err = PTR_ERR(defaults); |
| goto err_map; |
| } |
| |
| memcpy(vaddr, defaults, engine->context_size); |
| |
| i915_gem_object_unpin_map(engine->default_state); |
| i915_gem_object_unpin_map(obj); |
| } |
| |
| /* |
| * Try to make the context utilize L3 as well as LLC. |
| * |
| * On VLV we don't have L3 controls in the PTEs so we |
| * shouldn't touch the cache level, especially as that |
| * would make the object snooped which might have a |
| * negative performance impact. |
| * |
| * Snooping is required on non-llc platforms in execlist |
| * mode, but since all GGTT accesses use PAT entry 0 we |
| * get snooping anyway regardless of cache_level. |
| * |
| * This is only applicable for Ivy Bridge devices since |
| * later platforms don't have L3 control bits in the PTE. |
| */ |
| if (IS_IVYBRIDGE(i915)) { |
| /* Ignore any error, regard it as a simple optimisation */ |
| i915_gem_object_set_cache_level(obj, I915_CACHE_L3_LLC); |
| } |
| |
| vma = i915_vma_instance(obj, &i915->ggtt.vm, NULL); |
| if (IS_ERR(vma)) { |
| err = PTR_ERR(vma); |
| goto err_obj; |
| } |
| |
| return vma; |
| |
| err_map: |
| i915_gem_object_unpin_map(obj); |
| err_obj: |
| i915_gem_object_put(obj); |
| return ERR_PTR(err); |
| } |
| |
| static struct intel_context * |
| __ring_context_pin(struct intel_engine_cs *engine, |
| struct i915_gem_context *ctx, |
| struct intel_context *ce) |
| { |
| int err; |
| |
| if (!ce->state && engine->context_size) { |
| struct i915_vma *vma; |
| |
| vma = alloc_context_vma(engine); |
| if (IS_ERR(vma)) { |
| err = PTR_ERR(vma); |
| goto err; |
| } |
| |
| ce->state = vma; |
| } |
| |
| err = __context_pin(ce); |
| if (err) |
| goto err; |
| |
| err = __context_pin_ppgtt(ce->gem_context); |
| if (err) |
| goto err_unpin; |
| |
| i915_gem_context_get(ctx); |
| |
| /* One ringbuffer to rule them all */ |
| GEM_BUG_ON(!engine->buffer); |
| ce->ring = engine->buffer; |
| |
| return ce; |
| |
| err_unpin: |
| __context_unpin(ce); |
| err: |
| ce->pin_count = 0; |
| return ERR_PTR(err); |
| } |
| |
| static const struct intel_context_ops ring_context_ops = { |
| .unpin = intel_ring_context_unpin, |
| .destroy = intel_ring_context_destroy, |
| }; |
| |
| static struct intel_context * |
| intel_ring_context_pin(struct intel_engine_cs *engine, |
| struct i915_gem_context *ctx) |
| { |
| struct intel_context *ce = to_intel_context(ctx, engine); |
| |
| lockdep_assert_held(&ctx->i915->drm.struct_mutex); |
| |
| if (likely(ce->pin_count++)) |
| return ce; |
| GEM_BUG_ON(!ce->pin_count); /* no overflow please! */ |
| |
| ce->ops = &ring_context_ops; |
| |
| return __ring_context_pin(engine, ctx, ce); |
| } |
| |
| static int intel_init_ring_buffer(struct intel_engine_cs *engine) |
| { |
| struct i915_timeline *timeline; |
| struct intel_ring *ring; |
| int err; |
| |
| intel_engine_setup_common(engine); |
| |
| timeline = i915_timeline_create(engine->i915, engine->name); |
| if (IS_ERR(timeline)) { |
| err = PTR_ERR(timeline); |
| goto err; |
| } |
| |
| ring = intel_engine_create_ring(engine, timeline, 32 * PAGE_SIZE); |
| i915_timeline_put(timeline); |
| if (IS_ERR(ring)) { |
| err = PTR_ERR(ring); |
| goto err; |
| } |
| |
| err = intel_ring_pin(ring); |
| if (err) |
| goto err_ring; |
| |
| GEM_BUG_ON(engine->buffer); |
| engine->buffer = ring; |
| |
| err = intel_engine_init_common(engine); |
| if (err) |
| goto err_unpin; |
| |
| return 0; |
| |
| err_unpin: |
| intel_ring_unpin(ring); |
| err_ring: |
| intel_ring_free(ring); |
| err: |
| intel_engine_cleanup_common(engine); |
| return err; |
| } |
| |
| void intel_engine_cleanup(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| WARN_ON(INTEL_GEN(dev_priv) > 2 && |
| (I915_READ_MODE(engine) & MODE_IDLE) == 0); |
| |
| intel_ring_unpin(engine->buffer); |
| intel_ring_free(engine->buffer); |
| |
| if (engine->cleanup) |
| engine->cleanup(engine); |
| |
| intel_engine_cleanup_common(engine); |
| |
| dev_priv->engine[engine->id] = NULL; |
| kfree(engine); |
| } |
| |
| void intel_legacy_submission_resume(struct drm_i915_private *dev_priv) |
| { |
| struct intel_engine_cs *engine; |
| enum intel_engine_id id; |
| |
| /* Restart from the beginning of the rings for convenience */ |
| for_each_engine(engine, dev_priv, id) |
| intel_ring_reset(engine->buffer, 0); |
| } |
| |
| static int load_pd_dir(struct i915_request *rq, |
| const struct i915_hw_ppgtt *ppgtt) |
| { |
| const struct intel_engine_cs * const engine = rq->engine; |
| u32 *cs; |
| |
| cs = intel_ring_begin(rq, 6); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| *cs++ = MI_LOAD_REGISTER_IMM(1); |
| *cs++ = i915_mmio_reg_offset(RING_PP_DIR_DCLV(engine)); |
| *cs++ = PP_DIR_DCLV_2G; |
| |
| *cs++ = MI_LOAD_REGISTER_IMM(1); |
| *cs++ = i915_mmio_reg_offset(RING_PP_DIR_BASE(engine)); |
| *cs++ = ppgtt->pd.base.ggtt_offset << 10; |
| |
| intel_ring_advance(rq, cs); |
| |
| return 0; |
| } |
| |
| static int flush_pd_dir(struct i915_request *rq) |
| { |
| const struct intel_engine_cs * const engine = rq->engine; |
| u32 *cs; |
| |
| cs = intel_ring_begin(rq, 4); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| /* Stall until the page table load is complete */ |
| *cs++ = MI_STORE_REGISTER_MEM | MI_SRM_LRM_GLOBAL_GTT; |
| *cs++ = i915_mmio_reg_offset(RING_PP_DIR_BASE(engine)); |
| *cs++ = i915_scratch_offset(rq->i915); |
| *cs++ = MI_NOOP; |
| |
| intel_ring_advance(rq, cs); |
| return 0; |
| } |
| |
| static inline int mi_set_context(struct i915_request *rq, u32 flags) |
| { |
| struct drm_i915_private *i915 = rq->i915; |
| struct intel_engine_cs *engine = rq->engine; |
| enum intel_engine_id id; |
| const int num_rings = |
| /* Use an extended w/a on gen7 if signalling from other rings */ |
| (HAS_LEGACY_SEMAPHORES(i915) && IS_GEN7(i915)) ? |
| INTEL_INFO(i915)->num_rings - 1 : |
| 0; |
| bool force_restore = false; |
| int len; |
| u32 *cs; |
| |
| flags |= MI_MM_SPACE_GTT; |
| if (IS_HASWELL(i915)) |
| /* These flags are for resource streamer on HSW+ */ |
| flags |= HSW_MI_RS_SAVE_STATE_EN | HSW_MI_RS_RESTORE_STATE_EN; |
| else |
| flags |= MI_SAVE_EXT_STATE_EN | MI_RESTORE_EXT_STATE_EN; |
| |
| len = 4; |
| if (IS_GEN7(i915)) |
| len += 2 + (num_rings ? 4*num_rings + 6 : 0); |
| if (flags & MI_FORCE_RESTORE) { |
| GEM_BUG_ON(flags & MI_RESTORE_INHIBIT); |
| flags &= ~MI_FORCE_RESTORE; |
| force_restore = true; |
| len += 2; |
| } |
| |
| cs = intel_ring_begin(rq, len); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| /* WaProgramMiArbOnOffAroundMiSetContext:ivb,vlv,hsw,bdw,chv */ |
| if (IS_GEN7(i915)) { |
| *cs++ = MI_ARB_ON_OFF | MI_ARB_DISABLE; |
| if (num_rings) { |
| struct intel_engine_cs *signaller; |
| |
| *cs++ = MI_LOAD_REGISTER_IMM(num_rings); |
| for_each_engine(signaller, i915, id) { |
| if (signaller == engine) |
| continue; |
| |
| *cs++ = i915_mmio_reg_offset( |
| RING_PSMI_CTL(signaller->mmio_base)); |
| *cs++ = _MASKED_BIT_ENABLE( |
| GEN6_PSMI_SLEEP_MSG_DISABLE); |
| } |
| } |
| } |
| |
| if (force_restore) { |
| /* |
| * The HW doesn't handle being told to restore the current |
| * context very well. Quite often it likes goes to go off and |
| * sulk, especially when it is meant to be reloading PP_DIR. |
| * A very simple fix to force the reload is to simply switch |
| * away from the current context and back again. |
| * |
| * Note that the kernel_context will contain random state |
| * following the INHIBIT_RESTORE. We accept this since we |
| * never use the kernel_context state; it is merely a |
| * placeholder we use to flush other contexts. |
| */ |
| *cs++ = MI_SET_CONTEXT; |
| *cs++ = i915_ggtt_offset(to_intel_context(i915->kernel_context, |
| engine)->state) | |
| MI_MM_SPACE_GTT | |
| MI_RESTORE_INHIBIT; |
| } |
| |
| *cs++ = MI_NOOP; |
| *cs++ = MI_SET_CONTEXT; |
| *cs++ = i915_ggtt_offset(rq->hw_context->state) | flags; |
| /* |
| * w/a: MI_SET_CONTEXT must always be followed by MI_NOOP |
| * WaMiSetContext_Hang:snb,ivb,vlv |
| */ |
| *cs++ = MI_NOOP; |
| |
| if (IS_GEN7(i915)) { |
| if (num_rings) { |
| struct intel_engine_cs *signaller; |
| i915_reg_t last_reg = {}; /* keep gcc quiet */ |
| |
| *cs++ = MI_LOAD_REGISTER_IMM(num_rings); |
| for_each_engine(signaller, i915, id) { |
| if (signaller == engine) |
| continue; |
| |
| last_reg = RING_PSMI_CTL(signaller->mmio_base); |
| *cs++ = i915_mmio_reg_offset(last_reg); |
| *cs++ = _MASKED_BIT_DISABLE( |
| GEN6_PSMI_SLEEP_MSG_DISABLE); |
| } |
| |
| /* Insert a delay before the next switch! */ |
| *cs++ = MI_STORE_REGISTER_MEM | MI_SRM_LRM_GLOBAL_GTT; |
| *cs++ = i915_mmio_reg_offset(last_reg); |
| *cs++ = i915_scratch_offset(rq->i915); |
| *cs++ = MI_NOOP; |
| } |
| *cs++ = MI_ARB_ON_OFF | MI_ARB_ENABLE; |
| } |
| |
| intel_ring_advance(rq, cs); |
| |
| return 0; |
| } |
| |
| static int remap_l3(struct i915_request *rq, int slice) |
| { |
| u32 *cs, *remap_info = rq->i915->l3_parity.remap_info[slice]; |
| int i; |
| |
| if (!remap_info) |
| return 0; |
| |
| cs = intel_ring_begin(rq, GEN7_L3LOG_SIZE/4 * 2 + 2); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| /* |
| * Note: We do not worry about the concurrent register cacheline hang |
| * here because no other code should access these registers other than |
| * at initialization time. |
| */ |
| *cs++ = MI_LOAD_REGISTER_IMM(GEN7_L3LOG_SIZE/4); |
| for (i = 0; i < GEN7_L3LOG_SIZE/4; i++) { |
| *cs++ = i915_mmio_reg_offset(GEN7_L3LOG(slice, i)); |
| *cs++ = remap_info[i]; |
| } |
| *cs++ = MI_NOOP; |
| intel_ring_advance(rq, cs); |
| |
| return 0; |
| } |
| |
| static int switch_context(struct i915_request *rq) |
| { |
| struct intel_engine_cs *engine = rq->engine; |
| struct i915_gem_context *ctx = rq->gem_context; |
| struct i915_hw_ppgtt *ppgtt = ctx->ppgtt ?: rq->i915->mm.aliasing_ppgtt; |
| unsigned int unwind_mm = 0; |
| u32 hw_flags = 0; |
| int ret, i; |
| |
| lockdep_assert_held(&rq->i915->drm.struct_mutex); |
| GEM_BUG_ON(HAS_EXECLISTS(rq->i915)); |
| |
| if (ppgtt) { |
| int loops; |
| |
| /* |
| * Baytail takes a little more convincing that it really needs |
| * to reload the PD between contexts. It is not just a little |
| * longer, as adding more stalls after the load_pd_dir (i.e. |
| * adding a long loop around flush_pd_dir) is not as effective |
| * as reloading the PD umpteen times. 32 is derived from |
| * experimentation (gem_exec_parallel/fds) and has no good |
| * explanation. |
| */ |
| loops = 1; |
| if (engine->id == BCS && IS_VALLEYVIEW(engine->i915)) |
| loops = 32; |
| |
| do { |
| ret = load_pd_dir(rq, ppgtt); |
| if (ret) |
| goto err; |
| } while (--loops); |
| |
| if (intel_engine_flag(engine) & ppgtt->pd_dirty_rings) { |
| unwind_mm = intel_engine_flag(engine); |
| ppgtt->pd_dirty_rings &= ~unwind_mm; |
| hw_flags = MI_FORCE_RESTORE; |
| } |
| } |
| |
| if (rq->hw_context->state) { |
| GEM_BUG_ON(engine->id != RCS); |
| |
| /* |
| * The kernel context(s) is treated as pure scratch and is not |
| * expected to retain any state (as we sacrifice it during |
| * suspend and on resume it may be corrupted). This is ok, |
| * as nothing actually executes using the kernel context; it |
| * is purely used for flushing user contexts. |
| */ |
| if (i915_gem_context_is_kernel(ctx)) |
| hw_flags = MI_RESTORE_INHIBIT; |
| |
| ret = mi_set_context(rq, hw_flags); |
| if (ret) |
| goto err_mm; |
| } |
| |
| if (ppgtt) { |
| ret = engine->emit_flush(rq, EMIT_INVALIDATE); |
| if (ret) |
| goto err_mm; |
| |
| ret = flush_pd_dir(rq); |
| if (ret) |
| goto err_mm; |
| |
| /* |
| * Not only do we need a full barrier (post-sync write) after |
| * invalidating the TLBs, but we need to wait a little bit |
| * longer. Whether this is merely delaying us, or the |
| * subsequent flush is a key part of serialising with the |
| * post-sync op, this extra pass appears vital before a |
| * mm switch! |
| */ |
| ret = engine->emit_flush(rq, EMIT_INVALIDATE); |
| if (ret) |
| goto err_mm; |
| |
| ret = engine->emit_flush(rq, EMIT_FLUSH); |
| if (ret) |
| goto err_mm; |
| } |
| |
| if (ctx->remap_slice) { |
| for (i = 0; i < MAX_L3_SLICES; i++) { |
| if (!(ctx->remap_slice & BIT(i))) |
| continue; |
| |
| ret = remap_l3(rq, i); |
| if (ret) |
| goto err_mm; |
| } |
| |
| ctx->remap_slice = 0; |
| } |
| |
| return 0; |
| |
| err_mm: |
| if (unwind_mm) |
| ppgtt->pd_dirty_rings |= unwind_mm; |
| err: |
| return ret; |
| } |
| |
| static int ring_request_alloc(struct i915_request *request) |
| { |
| int ret; |
| |
| GEM_BUG_ON(!request->hw_context->pin_count); |
| |
| /* 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; |
| |
| ret = intel_ring_wait_for_space(request->ring, request->reserved_space); |
| if (ret) |
| return ret; |
| |
| ret = switch_context(request); |
| if (ret) |
| return ret; |
| |
| request->reserved_space -= LEGACY_REQUEST_SIZE; |
| return 0; |
| } |
| |
| static noinline int wait_for_space(struct intel_ring *ring, unsigned int bytes) |
| { |
| struct i915_request *target; |
| long timeout; |
| |
| lockdep_assert_held(&ring->vma->vm->i915->drm.struct_mutex); |
| |
| if (intel_ring_update_space(ring) >= bytes) |
| return 0; |
| |
| GEM_BUG_ON(list_empty(&ring->request_list)); |
| list_for_each_entry(target, &ring->request_list, ring_link) { |
| /* Would completion of this request free enough space? */ |
| if (bytes <= __intel_ring_space(target->postfix, |
| ring->emit, ring->size)) |
| break; |
| } |
| |
| if (WARN_ON(&target->ring_link == &ring->request_list)) |
| return -ENOSPC; |
| |
| timeout = i915_request_wait(target, |
| I915_WAIT_INTERRUPTIBLE | I915_WAIT_LOCKED, |
| MAX_SCHEDULE_TIMEOUT); |
| if (timeout < 0) |
| return timeout; |
| |
| i915_request_retire_upto(target); |
| |
| intel_ring_update_space(ring); |
| GEM_BUG_ON(ring->space < bytes); |
| return 0; |
| } |
| |
| int intel_ring_wait_for_space(struct intel_ring *ring, unsigned int bytes) |
| { |
| GEM_BUG_ON(bytes > ring->effective_size); |
| if (unlikely(bytes > ring->effective_size - ring->emit)) |
| bytes += ring->size - ring->emit; |
| |
| if (unlikely(bytes > ring->space)) { |
| int ret = wait_for_space(ring, bytes); |
| if (unlikely(ret)) |
| return ret; |
| } |
| |
| GEM_BUG_ON(ring->space < bytes); |
| return 0; |
| } |
| |
| u32 *intel_ring_begin(struct i915_request *rq, unsigned int num_dwords) |
| { |
| struct intel_ring *ring = rq->ring; |
| const unsigned int remain_usable = ring->effective_size - ring->emit; |
| const unsigned int bytes = num_dwords * sizeof(u32); |
| unsigned int need_wrap = 0; |
| unsigned int total_bytes; |
| u32 *cs; |
| |
| /* Packets must be qword aligned. */ |
| GEM_BUG_ON(num_dwords & 1); |
| |
| total_bytes = bytes + rq->reserved_space; |
| GEM_BUG_ON(total_bytes > ring->effective_size); |
| |
| if (unlikely(total_bytes > remain_usable)) { |
| const int remain_actual = ring->size - ring->emit; |
| |
| if (bytes > remain_usable) { |
| /* |
| * Not enough space for the basic request. So need to |
| * flush out the remainder and then wait for |
| * base + reserved. |
| */ |
| total_bytes += remain_actual; |
| need_wrap = remain_actual | 1; |
| } else { |
| /* |
| * 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 from the start of ringbuffer. |
| */ |
| total_bytes = rq->reserved_space + remain_actual; |
| } |
| } |
| |
| if (unlikely(total_bytes > ring->space)) { |
| int ret; |
| |
| /* |
| * 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_request_alloc() and i915_request_add(). |
| */ |
| GEM_BUG_ON(!rq->reserved_space); |
| |
| ret = wait_for_space(ring, total_bytes); |
| if (unlikely(ret)) |
| return ERR_PTR(ret); |
| } |
| |
| if (unlikely(need_wrap)) { |
| need_wrap &= ~1; |
| GEM_BUG_ON(need_wrap > ring->space); |
| GEM_BUG_ON(ring->emit + need_wrap > ring->size); |
| GEM_BUG_ON(!IS_ALIGNED(need_wrap, sizeof(u64))); |
| |
| /* Fill the tail with MI_NOOP */ |
| memset64(ring->vaddr + ring->emit, 0, need_wrap / sizeof(u64)); |
| ring->space -= need_wrap; |
| ring->emit = 0; |
| } |
| |
| GEM_BUG_ON(ring->emit > ring->size - bytes); |
| GEM_BUG_ON(ring->space < bytes); |
| cs = ring->vaddr + ring->emit; |
| GEM_DEBUG_EXEC(memset32(cs, POISON_INUSE, bytes / sizeof(*cs))); |
| ring->emit += bytes; |
| ring->space -= bytes; |
| |
| return cs; |
| } |
| |
| /* Align the ring tail to a cacheline boundary */ |
| int intel_ring_cacheline_align(struct i915_request *rq) |
| { |
| int num_dwords; |
| void *cs; |
| |
| num_dwords = (rq->ring->emit & (CACHELINE_BYTES - 1)) / sizeof(u32); |
| if (num_dwords == 0) |
| return 0; |
| |
| num_dwords = CACHELINE_DWORDS - num_dwords; |
| GEM_BUG_ON(num_dwords & 1); |
| |
| cs = intel_ring_begin(rq, num_dwords); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| memset64(cs, (u64)MI_NOOP << 32 | MI_NOOP, num_dwords / 2); |
| intel_ring_advance(rq, cs); |
| |
| GEM_BUG_ON(rq->ring->emit & (CACHELINE_BYTES - 1)); |
| return 0; |
| } |
| |
| static void gen6_bsd_submit_request(struct i915_request *request) |
| { |
| struct drm_i915_private *dev_priv = request->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, |
| 1000, 0, NULL)) |
| DRM_ERROR("timed out waiting for the BSD ring to wake up\n"); |
| |
| /* Now that the ring is fully powered up, update the tail */ |
| i9xx_submit_request(request); |
| |
| /* 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 mi_flush_dw(struct i915_request *rq, u32 flags) |
| { |
| u32 cmd, *cs; |
| |
| cs = intel_ring_begin(rq, 4); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| cmd = MI_FLUSH_DW; |
| |
| /* |
| * 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." |
| */ |
| cmd |= flags; |
| |
| *cs++ = cmd; |
| *cs++ = I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT; |
| *cs++ = 0; |
| *cs++ = MI_NOOP; |
| |
| intel_ring_advance(rq, cs); |
| |
| return 0; |
| } |
| |
| static int gen6_flush_dw(struct i915_request *rq, u32 mode, u32 invflags) |
| { |
| return mi_flush_dw(rq, mode & EMIT_INVALIDATE ? invflags : 0); |
| } |
| |
| static int gen6_bsd_ring_flush(struct i915_request *rq, u32 mode) |
| { |
| return gen6_flush_dw(rq, mode, MI_INVALIDATE_TLB | MI_INVALIDATE_BSD); |
| } |
| |
| static int |
| hsw_emit_bb_start(struct i915_request *rq, |
| u64 offset, u32 len, |
| unsigned int dispatch_flags) |
| { |
| u32 *cs; |
| |
| cs = intel_ring_begin(rq, 2); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| *cs++ = MI_BATCH_BUFFER_START | (dispatch_flags & I915_DISPATCH_SECURE ? |
| 0 : MI_BATCH_PPGTT_HSW | MI_BATCH_NON_SECURE_HSW); |
| /* bit0-7 is the length on GEN6+ */ |
| *cs++ = offset; |
| intel_ring_advance(rq, cs); |
| |
| return 0; |
| } |
| |
| static int |
| gen6_emit_bb_start(struct i915_request *rq, |
| u64 offset, u32 len, |
| unsigned int dispatch_flags) |
| { |
| u32 *cs; |
| |
| cs = intel_ring_begin(rq, 2); |
| if (IS_ERR(cs)) |
| return PTR_ERR(cs); |
| |
| *cs++ = MI_BATCH_BUFFER_START | (dispatch_flags & I915_DISPATCH_SECURE ? |
| 0 : MI_BATCH_NON_SECURE_I965); |
| /* bit0-7 is the length on GEN6+ */ |
| *cs++ = offset; |
| intel_ring_advance(rq, cs); |
| |
| return 0; |
| } |
| |
| /* Blitter support (SandyBridge+) */ |
| |
| static int gen6_ring_flush(struct i915_request *rq, u32 mode) |
| { |
| return gen6_flush_dw(rq, mode, MI_INVALIDATE_TLB); |
| } |
| |
| static void intel_ring_init_semaphores(struct drm_i915_private *dev_priv, |
| struct intel_engine_cs *engine) |
| { |
| int i; |
| |
| if (!HAS_LEGACY_SEMAPHORES(dev_priv)) |
| return; |
| |
| GEM_BUG_ON(INTEL_GEN(dev_priv) < 6); |
| engine->semaphore.sync_to = gen6_ring_sync_to; |
| engine->semaphore.signal = gen6_signal; |
| |
| /* |
| * 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. |
| */ |
| for (i = 0; i < GEN6_NUM_SEMAPHORES; i++) { |
| static const struct { |
| u32 wait_mbox; |
| i915_reg_t mbox_reg; |
| } sem_data[GEN6_NUM_SEMAPHORES][GEN6_NUM_SEMAPHORES] = { |
| [RCS_HW] = { |
| [VCS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_RV, .mbox_reg = GEN6_VRSYNC }, |
| [BCS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_RB, .mbox_reg = GEN6_BRSYNC }, |
| [VECS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_RVE, .mbox_reg = GEN6_VERSYNC }, |
| }, |
| [VCS_HW] = { |
| [RCS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_VR, .mbox_reg = GEN6_RVSYNC }, |
| [BCS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_VB, .mbox_reg = GEN6_BVSYNC }, |
| [VECS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_VVE, .mbox_reg = GEN6_VEVSYNC }, |
| }, |
| [BCS_HW] = { |
| [RCS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_BR, .mbox_reg = GEN6_RBSYNC }, |
| [VCS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_BV, .mbox_reg = GEN6_VBSYNC }, |
| [VECS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_BVE, .mbox_reg = GEN6_VEBSYNC }, |
| }, |
| [VECS_HW] = { |
| [RCS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_VER, .mbox_reg = GEN6_RVESYNC }, |
| [VCS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_VEV, .mbox_reg = GEN6_VVESYNC }, |
| [BCS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_VEB, .mbox_reg = GEN6_BVESYNC }, |
| }, |
| }; |
| u32 wait_mbox; |
| i915_reg_t mbox_reg; |
| |
| if (i == engine->hw_id) { |
| wait_mbox = MI_SEMAPHORE_SYNC_INVALID; |
| mbox_reg = GEN6_NOSYNC; |
| } else { |
| wait_mbox = sem_data[engine->hw_id][i].wait_mbox; |
| mbox_reg = sem_data[engine->hw_id][i].mbox_reg; |
| } |
| |
| engine->semaphore.mbox.wait[i] = wait_mbox; |
| engine->semaphore.mbox.signal[i] = mbox_reg; |
| } |
| } |
| |
| static void intel_ring_init_irq(struct drm_i915_private *dev_priv, |
| struct intel_engine_cs *engine) |
| { |
| if (INTEL_GEN(dev_priv) >= 6) { |
| engine->irq_enable = gen6_irq_enable; |
| engine->irq_disable = gen6_irq_disable; |
| engine->irq_seqno_barrier = gen6_seqno_barrier; |
| } else if (INTEL_GEN(dev_priv) >= 5) { |
| engine->irq_enable = gen5_irq_enable; |
| engine->irq_disable = gen5_irq_disable; |
| engine->irq_seqno_barrier = gen5_seqno_barrier; |
| } else if (INTEL_GEN(dev_priv) >= 3) { |
| engine->irq_enable = i9xx_irq_enable; |
| engine->irq_disable = i9xx_irq_disable; |
| } else { |
| engine->irq_enable = i8xx_irq_enable; |
| engine->irq_disable = i8xx_irq_disable; |
| } |
| } |
| |
| static void i9xx_set_default_submission(struct intel_engine_cs *engine) |
| { |
| engine->submit_request = i9xx_submit_request; |
| engine->cancel_requests = cancel_requests; |
| |
| engine->park = NULL; |
| engine->unpark = NULL; |
| } |
| |
| static void gen6_bsd_set_default_submission(struct intel_engine_cs *engine) |
| { |
| i9xx_set_default_submission(engine); |
| engine->submit_request = gen6_bsd_submit_request; |
| } |
| |
| static void intel_ring_default_vfuncs(struct drm_i915_private *dev_priv, |
| struct intel_engine_cs *engine) |
| { |
| /* gen8+ are only supported with execlists */ |
| GEM_BUG_ON(INTEL_GEN(dev_priv) >= 8); |
| |
| intel_ring_init_irq(dev_priv, engine); |
| intel_ring_init_semaphores(dev_priv, engine); |
| |
| engine->init_hw = init_ring_common; |
| engine->reset.prepare = reset_prepare; |
| engine->reset.reset = reset_ring; |
| engine->reset.finish = reset_finish; |
| |
| engine->context_pin = intel_ring_context_pin; |
| engine->request_alloc = ring_request_alloc; |
| |
| engine->emit_breadcrumb = i9xx_emit_breadcrumb; |
| engine->emit_breadcrumb_sz = i9xx_emit_breadcrumb_sz; |
| if (HAS_LEGACY_SEMAPHORES(dev_priv)) { |
| int num_rings; |
| |
| engine->emit_breadcrumb = gen6_sema_emit_breadcrumb; |
| |
| num_rings = INTEL_INFO(dev_priv)->num_rings - 1; |
| engine->emit_breadcrumb_sz += num_rings * 3; |
| if (num_rings & 1) |
| engine->emit_breadcrumb_sz++; |
| } |
| |
| engine->set_default_submission = i9xx_set_default_submission; |
| |
| if (INTEL_GEN(dev_priv) >= 6) |
| engine->emit_bb_start = gen6_emit_bb_start; |
| else if (INTEL_GEN(dev_priv) >= 4) |
| engine->emit_bb_start = i965_emit_bb_start; |
| else if (IS_I830(dev_priv) || IS_I845G(dev_priv)) |
| engine->emit_bb_start = i830_emit_bb_start; |
| else |
| engine->emit_bb_start = i915_emit_bb_start; |
| } |
| |
| int intel_init_render_ring_buffer(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| int ret; |
| |
| intel_ring_default_vfuncs(dev_priv, engine); |
| |
| if (HAS_L3_DPF(dev_priv)) |
| engine->irq_keep_mask = GT_RENDER_L3_PARITY_ERROR_INTERRUPT; |
| |
| engine->irq_enable_mask = GT_RENDER_USER_INTERRUPT; |
| |
| if (INTEL_GEN(dev_priv) >= 6) { |
| engine->init_context = intel_rcs_ctx_init; |
| engine->emit_flush = gen7_render_ring_flush; |
| if (IS_GEN6(dev_priv)) |
| engine->emit_flush = gen6_render_ring_flush; |
| } else if (IS_GEN5(dev_priv)) { |
| engine->emit_flush = gen4_render_ring_flush; |
| } else { |
| if (INTEL_GEN(dev_priv) < 4) |
| engine->emit_flush = gen2_render_ring_flush; |
| else |
| engine->emit_flush = gen4_render_ring_flush; |
| engine->irq_enable_mask = I915_USER_INTERRUPT; |
| } |
| |
| if (IS_HASWELL(dev_priv)) |
| engine->emit_bb_start = hsw_emit_bb_start; |
| |
| engine->init_hw = init_render_ring; |
| |
| ret = intel_init_ring_buffer(engine); |
| if (ret) |
| return ret; |
| |
| return 0; |
| } |
| |
| int intel_init_bsd_ring_buffer(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| intel_ring_default_vfuncs(dev_priv, engine); |
| |
| if (INTEL_GEN(dev_priv) >= 6) { |
| /* gen6 bsd needs a special wa for tail updates */ |
| if (IS_GEN6(dev_priv)) |
| engine->set_default_submission = gen6_bsd_set_default_submission; |
| engine->emit_flush = gen6_bsd_ring_flush; |
| engine->irq_enable_mask = GT_BSD_USER_INTERRUPT; |
| } else { |
| engine->emit_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(engine); |
| } |
| |
| int intel_init_blt_ring_buffer(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| intel_ring_default_vfuncs(dev_priv, engine); |
| |
| engine->emit_flush = gen6_ring_flush; |
| engine->irq_enable_mask = GT_BLT_USER_INTERRUPT; |
| |
| return intel_init_ring_buffer(engine); |
| } |
| |
| int intel_init_vebox_ring_buffer(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| intel_ring_default_vfuncs(dev_priv, engine); |
| |
| engine->emit_flush = gen6_ring_flush; |
| engine->irq_enable_mask = PM_VEBOX_USER_INTERRUPT; |
| engine->irq_enable = hsw_vebox_irq_enable; |
| engine->irq_disable = hsw_vebox_irq_disable; |
| |
| return intel_init_ring_buffer(engine); |
| } |