diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_engine_cs.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_engine_cs.c | 468 |
1 files changed, 468 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c new file mode 100644 index 000000000000..3da4d466e332 --- /dev/null +++ b/drivers/gpu/drm/i915/intel_engine_cs.c @@ -0,0 +1,468 @@ +/* + * Copyright © 2016 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. + * + */ + +#include "i915_drv.h" +#include "intel_ringbuffer.h" +#include "intel_lrc.h" + +static const struct engine_info { + const char *name; + unsigned exec_id; + enum intel_engine_hw_id hw_id; + u32 mmio_base; + unsigned irq_shift; + int (*init_legacy)(struct intel_engine_cs *engine); + int (*init_execlists)(struct intel_engine_cs *engine); +} intel_engines[] = { + [RCS] = { + .name = "render ring", + .exec_id = I915_EXEC_RENDER, + .hw_id = RCS_HW, + .mmio_base = RENDER_RING_BASE, + .irq_shift = GEN8_RCS_IRQ_SHIFT, + .init_execlists = logical_render_ring_init, + .init_legacy = intel_init_render_ring_buffer, + }, + [BCS] = { + .name = "blitter ring", + .exec_id = I915_EXEC_BLT, + .hw_id = BCS_HW, + .mmio_base = BLT_RING_BASE, + .irq_shift = GEN8_BCS_IRQ_SHIFT, + .init_execlists = logical_xcs_ring_init, + .init_legacy = intel_init_blt_ring_buffer, + }, + [VCS] = { + .name = "bsd ring", + .exec_id = I915_EXEC_BSD, + .hw_id = VCS_HW, + .mmio_base = GEN6_BSD_RING_BASE, + .irq_shift = GEN8_VCS1_IRQ_SHIFT, + .init_execlists = logical_xcs_ring_init, + .init_legacy = intel_init_bsd_ring_buffer, + }, + [VCS2] = { + .name = "bsd2 ring", + .exec_id = I915_EXEC_BSD, + .hw_id = VCS2_HW, + .mmio_base = GEN8_BSD2_RING_BASE, + .irq_shift = GEN8_VCS2_IRQ_SHIFT, + .init_execlists = logical_xcs_ring_init, + .init_legacy = intel_init_bsd2_ring_buffer, + }, + [VECS] = { + .name = "video enhancement ring", + .exec_id = I915_EXEC_VEBOX, + .hw_id = VECS_HW, + .mmio_base = VEBOX_RING_BASE, + .irq_shift = GEN8_VECS_IRQ_SHIFT, + .init_execlists = logical_xcs_ring_init, + .init_legacy = intel_init_vebox_ring_buffer, + }, +}; + +static int +intel_engine_setup(struct drm_i915_private *dev_priv, + enum intel_engine_id id) +{ + const struct engine_info *info = &intel_engines[id]; + struct intel_engine_cs *engine; + + GEM_BUG_ON(dev_priv->engine[id]); + engine = kzalloc(sizeof(*engine), GFP_KERNEL); + if (!engine) + return -ENOMEM; + + engine->id = id; + engine->i915 = dev_priv; + engine->name = info->name; + engine->exec_id = info->exec_id; + engine->hw_id = engine->guc_id = info->hw_id; + engine->mmio_base = info->mmio_base; + engine->irq_shift = info->irq_shift; + + /* Nothing to do here, execute in order of dependencies */ + engine->schedule = NULL; + + dev_priv->engine[id] = engine; + return 0; +} + +/** + * intel_engines_init() - allocate, populate and init the Engine Command Streamers + * @dev: DRM device. + * + * Return: non-zero if the initialization failed. + */ +int intel_engines_init(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = to_i915(dev); + struct intel_device_info *device_info = mkwrite_device_info(dev_priv); + unsigned int ring_mask = INTEL_INFO(dev_priv)->ring_mask; + unsigned int mask = 0; + int (*init)(struct intel_engine_cs *engine); + struct intel_engine_cs *engine; + enum intel_engine_id id; + unsigned int i; + int ret; + + WARN_ON(ring_mask == 0); + WARN_ON(ring_mask & + GENMASK(sizeof(mask) * BITS_PER_BYTE - 1, I915_NUM_ENGINES)); + + for (i = 0; i < ARRAY_SIZE(intel_engines); i++) { + if (!HAS_ENGINE(dev_priv, i)) + continue; + + if (i915.enable_execlists) + init = intel_engines[i].init_execlists; + else + init = intel_engines[i].init_legacy; + + if (!init) + continue; + + ret = intel_engine_setup(dev_priv, i); + if (ret) + goto cleanup; + + ret = init(dev_priv->engine[i]); + if (ret) + goto cleanup; + + mask |= ENGINE_MASK(i); + } + + /* + * Catch failures to update intel_engines table when the new engines + * are added to the driver by a warning and disabling the forgotten + * engines. + */ + if (WARN_ON(mask != ring_mask)) + device_info->ring_mask = mask; + + device_info->num_rings = hweight32(mask); + + return 0; + +cleanup: + for_each_engine(engine, dev_priv, id) { + if (i915.enable_execlists) + intel_logical_ring_cleanup(engine); + else + intel_engine_cleanup(engine); + } + + return ret; +} + +void intel_engine_init_global_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) { + struct page *page = i915_vma_first_page(dev_priv->semaphore); + void *semaphores; + + /* Semaphores are in noncoherent memory, flush to be safe */ + semaphores = kmap(page); + memset(semaphores + GEN8_SEMAPHORE_OFFSET(engine->id, 0), + 0, I915_NUM_ENGINES * gen8_semaphore_seqno_size); + drm_clflush_virt_range(semaphores + GEN8_SEMAPHORE_OFFSET(engine->id, 0), + I915_NUM_ENGINES * gen8_semaphore_seqno_size); + kunmap(page); + } + + intel_write_status_page(engine, I915_GEM_HWS_INDEX, seqno); + if (engine->irq_seqno_barrier) + engine->irq_seqno_barrier(engine); + + GEM_BUG_ON(i915_gem_active_isset(&engine->timeline->last_request)); + engine->timeline->last_submitted_seqno = seqno; + + engine->hangcheck.seqno = seqno; + + /* After manually advancing the seqno, fake the interrupt in case + * there are any waiters for that seqno. + */ + intel_engine_wakeup(engine); +} + +static void intel_engine_init_timeline(struct intel_engine_cs *engine) +{ + engine->timeline = &engine->i915->gt.global_timeline.engine[engine->id]; +} + +/** + * intel_engines_setup_common - setup engine state not requiring hw access + * @engine: Engine to setup. + * + * Initializes @engine@ structure members shared between legacy and execlists + * submission modes which do not require hardware access. + * + * Typically done early in the submission mode specific engine setup stage. + */ +void intel_engine_setup_common(struct intel_engine_cs *engine) +{ + engine->execlist_queue = RB_ROOT; + engine->execlist_first = NULL; + + intel_engine_init_timeline(engine); + intel_engine_init_hangcheck(engine); + i915_gem_batch_pool_init(engine, &engine->batch_pool); + + intel_engine_init_cmd_parser(engine); +} + +int intel_engine_create_scratch(struct intel_engine_cs *engine, int size) +{ + struct drm_i915_gem_object *obj; + struct i915_vma *vma; + int ret; + + WARN_ON(engine->scratch); + + obj = i915_gem_object_create_stolen(&engine->i915->drm, size); + if (!obj) + obj = i915_gem_object_create_internal(engine->i915, size); + if (IS_ERR(obj)) { + DRM_ERROR("Failed to allocate scratch page\n"); + return PTR_ERR(obj); + } + + vma = i915_vma_create(obj, &engine->i915->ggtt.base, NULL); + if (IS_ERR(vma)) { + ret = PTR_ERR(vma); + goto err_unref; + } + + ret = i915_vma_pin(vma, 0, 4096, PIN_GLOBAL | PIN_HIGH); + if (ret) + goto err_unref; + + engine->scratch = vma; + DRM_DEBUG_DRIVER("%s pipe control offset: 0x%08x\n", + engine->name, i915_ggtt_offset(vma)); + return 0; + +err_unref: + i915_gem_object_put(obj); + return ret; +} + +static void intel_engine_cleanup_scratch(struct intel_engine_cs *engine) +{ + i915_vma_unpin_and_release(&engine->scratch); +} + +/** + * intel_engines_init_common - initialize cengine state which might require hw access + * @engine: Engine to initialize. + * + * Initializes @engine@ structure members shared between legacy and execlists + * submission modes which do require hardware access. + * + * Typcally done at later stages of submission mode specific engine setup. + * + * Returns zero on success or an error code on failure. + */ +int intel_engine_init_common(struct intel_engine_cs *engine) +{ + int ret; + + ret = intel_engine_init_breadcrumbs(engine); + if (ret) + return ret; + + ret = i915_gem_render_state_init(engine); + if (ret) + return ret; + + return 0; +} + +/** + * intel_engines_cleanup_common - cleans up the engine state created by + * the common initiailizers. + * @engine: Engine to cleanup. + * + * This cleans up everything created by the common helpers. + */ +void intel_engine_cleanup_common(struct intel_engine_cs *engine) +{ + intel_engine_cleanup_scratch(engine); + + i915_gem_render_state_fini(engine); + intel_engine_fini_breadcrumbs(engine); + intel_engine_cleanup_cmd_parser(engine); + i915_gem_batch_pool_fini(&engine->batch_pool); +} + +u64 intel_engine_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; +} + +u64 intel_engine_get_last_batch_head(struct intel_engine_cs *engine) +{ + struct drm_i915_private *dev_priv = engine->i915; + u64 bbaddr; + + if (INTEL_GEN(dev_priv) >= 8) + bbaddr = I915_READ64_2x32(RING_BBADDR(engine->mmio_base), + RING_BBADDR_UDW(engine->mmio_base)); + else + bbaddr = I915_READ(RING_BBADDR(engine->mmio_base)); + + return bbaddr; +} + +const char *i915_cache_level_str(struct drm_i915_private *i915, int type) +{ + switch (type) { + case I915_CACHE_NONE: return " uncached"; + case I915_CACHE_LLC: return HAS_LLC(i915) ? " LLC" : " snooped"; + case I915_CACHE_L3_LLC: return " L3+LLC"; + case I915_CACHE_WT: return " WT"; + default: return ""; + } +} + +static inline uint32_t +read_subslice_reg(struct drm_i915_private *dev_priv, int slice, + int subslice, i915_reg_t reg) +{ + uint32_t mcr; + uint32_t ret; + enum forcewake_domains fw_domains; + + fw_domains = intel_uncore_forcewake_for_reg(dev_priv, reg, + FW_REG_READ); + fw_domains |= intel_uncore_forcewake_for_reg(dev_priv, + GEN8_MCR_SELECTOR, + FW_REG_READ | FW_REG_WRITE); + + spin_lock_irq(&dev_priv->uncore.lock); + intel_uncore_forcewake_get__locked(dev_priv, fw_domains); + + mcr = I915_READ_FW(GEN8_MCR_SELECTOR); + /* + * The HW expects the slice and sublice selectors to be reset to 0 + * after reading out the registers. + */ + WARN_ON_ONCE(mcr & (GEN8_MCR_SLICE_MASK | GEN8_MCR_SUBSLICE_MASK)); + mcr &= ~(GEN8_MCR_SLICE_MASK | GEN8_MCR_SUBSLICE_MASK); + mcr |= GEN8_MCR_SLICE(slice) | GEN8_MCR_SUBSLICE(subslice); + I915_WRITE_FW(GEN8_MCR_SELECTOR, mcr); + + ret = I915_READ_FW(reg); + + mcr &= ~(GEN8_MCR_SLICE_MASK | GEN8_MCR_SUBSLICE_MASK); + I915_WRITE_FW(GEN8_MCR_SELECTOR, mcr); + + intel_uncore_forcewake_put__locked(dev_priv, fw_domains); + spin_unlock_irq(&dev_priv->uncore.lock); + + return ret; +} + +/* NB: please notice the memset */ +void intel_engine_get_instdone(struct intel_engine_cs *engine, + struct intel_instdone *instdone) +{ + struct drm_i915_private *dev_priv = engine->i915; + u32 mmio_base = engine->mmio_base; + int slice; + int subslice; + + memset(instdone, 0, sizeof(*instdone)); + + switch (INTEL_GEN(dev_priv)) { + default: + instdone->instdone = I915_READ(RING_INSTDONE(mmio_base)); + + if (engine->id != RCS) + break; + + instdone->slice_common = I915_READ(GEN7_SC_INSTDONE); + for_each_instdone_slice_subslice(dev_priv, slice, subslice) { + instdone->sampler[slice][subslice] = + read_subslice_reg(dev_priv, slice, subslice, + GEN7_SAMPLER_INSTDONE); + instdone->row[slice][subslice] = + read_subslice_reg(dev_priv, slice, subslice, + GEN7_ROW_INSTDONE); + } + break; + case 7: + instdone->instdone = I915_READ(RING_INSTDONE(mmio_base)); + + if (engine->id != RCS) + break; + + instdone->slice_common = I915_READ(GEN7_SC_INSTDONE); + instdone->sampler[0][0] = I915_READ(GEN7_SAMPLER_INSTDONE); + instdone->row[0][0] = I915_READ(GEN7_ROW_INSTDONE); + + break; + case 6: + case 5: + case 4: + instdone->instdone = I915_READ(RING_INSTDONE(mmio_base)); + + if (engine->id == RCS) + /* HACK: Using the wrong struct member */ + instdone->slice_common = I915_READ(GEN4_INSTDONE1); + break; + case 3: + case 2: + instdone->instdone = I915_READ(GEN2_INSTDONE); + break; + } +} |