/* * 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 * Zou Nan hai * Xiang Hai hao * */ #include "drmP.h" #include "drm.h" #include "i915_drv.h" #include "i915_drm.h" #include "i915_trace.h" #include "intel_drv.h" static u32 i915_gem_get_seqno(struct drm_device *dev) { drm_i915_private_t *dev_priv = dev->dev_private; u32 seqno; seqno = dev_priv->next_seqno; /* reserve 0 for non-seqno */ if (++dev_priv->next_seqno == 0) dev_priv->next_seqno = 1; return seqno; } static void render_ring_flush(struct drm_device *dev, struct intel_ring_buffer *ring, u32 invalidate_domains, u32 flush_domains) { drm_i915_private_t *dev_priv = dev->dev_private; u32 cmd; #if WATCH_EXEC DRM_INFO("%s: invalidate %08x flush %08x\n", __func__, invalidate_domains, flush_domains); #endif trace_i915_gem_request_flush(dev, dev_priv->next_seqno, invalidate_domains, flush_domains); if ((invalidate_domains | flush_domains) & I915_GEM_GPU_DOMAINS) { /* * 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 (INTEL_INFO(dev)->gen < 4) { /* * On the 965, the sampler cache always gets flushed * and this bit is reserved. */ if (invalidate_domains & I915_GEM_DOMAIN_SAMPLER) cmd |= MI_READ_FLUSH; } if (invalidate_domains & I915_GEM_DOMAIN_INSTRUCTION) cmd |= MI_EXE_FLUSH; #if WATCH_EXEC DRM_INFO("%s: queue flush %08x to ring\n", __func__, cmd); #endif intel_ring_begin(dev, ring, 2); intel_ring_emit(dev, ring, cmd); intel_ring_emit(dev, ring, MI_NOOP); intel_ring_advance(dev, ring); } } static void ring_set_tail(struct drm_device *dev, struct intel_ring_buffer *ring, u32 value) { drm_i915_private_t *dev_priv = dev->dev_private; I915_WRITE_TAIL(ring, ring->tail); } static unsigned int render_ring_get_active_head(struct drm_device *dev, struct intel_ring_buffer *ring) { drm_i915_private_t *dev_priv = dev->dev_private; u32 acthd_reg = INTEL_INFO(dev)->gen ? ACTHD_I965 : ACTHD; return I915_READ(acthd_reg); } static int init_ring_common(struct drm_device *dev, struct intel_ring_buffer *ring) { u32 head; drm_i915_private_t *dev_priv = dev->dev_private; struct drm_i915_gem_object *obj_priv; obj_priv = to_intel_bo(ring->gem_object); /* Stop the ring if it's running. */ I915_WRITE_CTL(ring, 0); I915_WRITE_HEAD(ring, 0); ring->set_tail(dev, ring, 0); /* Initialize the ring. */ I915_WRITE_START(ring, obj_priv->gtt_offset); head = I915_READ_HEAD(ring) & HEAD_ADDR; /* G45 ring initialization fails to reset head to zero */ if (head != 0) { DRM_ERROR("%s head not reset to zero " "ctl %08x head %08x tail %08x start %08x\n", ring->name, I915_READ_CTL(ring), I915_READ_HEAD(ring), I915_READ_TAIL(ring), I915_READ_START(ring)); I915_WRITE_HEAD(ring, 0); DRM_ERROR("%s head forced to zero " "ctl %08x head %08x tail %08x start %08x\n", ring->name, I915_READ_CTL(ring), I915_READ_HEAD(ring), I915_READ_TAIL(ring), I915_READ_START(ring)); } I915_WRITE_CTL(ring, ((ring->gem_object->size - PAGE_SIZE) & RING_NR_PAGES) | RING_NO_REPORT | RING_VALID); head = I915_READ_HEAD(ring) & HEAD_ADDR; /* If the head is still not zero, the ring is dead */ if (head != 0) { DRM_ERROR("%s initialization failed " "ctl %08x head %08x tail %08x start %08x\n", ring->name, I915_READ_CTL(ring), I915_READ_HEAD(ring), I915_READ_TAIL(ring), I915_READ_START(ring)); return -EIO; } if (!drm_core_check_feature(dev, DRIVER_MODESET)) i915_kernel_lost_context(dev); else { ring->head = I915_READ_HEAD(ring) & HEAD_ADDR; ring->tail = I915_READ_TAIL(ring) & TAIL_ADDR; ring->space = ring->head - (ring->tail + 8); if (ring->space < 0) ring->space += ring->size; } return 0; } static int init_render_ring(struct drm_device *dev, struct intel_ring_buffer *ring) { drm_i915_private_t *dev_priv = dev->dev_private; int ret = init_ring_common(dev, ring); int mode; if (INTEL_INFO(dev)->gen > 3) { mode = VS_TIMER_DISPATCH << 16 | VS_TIMER_DISPATCH; if (IS_GEN6(dev)) mode |= MI_FLUSH_ENABLE << 16 | MI_FLUSH_ENABLE; I915_WRITE(MI_MODE, mode); } return ret; } #define PIPE_CONTROL_FLUSH(addr) \ do { \ OUT_RING(GFX_OP_PIPE_CONTROL | PIPE_CONTROL_QW_WRITE | \ PIPE_CONTROL_DEPTH_STALL | 2); \ OUT_RING(addr | PIPE_CONTROL_GLOBAL_GTT); \ OUT_RING(0); \ OUT_RING(0); \ } while (0) /** * Creates a new sequence number, emitting a write of it to the status page * plus an interrupt, which will trigger i915_user_interrupt_handler. * * Must be called with struct_lock held. * * Returned sequence numbers are nonzero on success. */ static u32 render_ring_add_request(struct drm_device *dev, struct intel_ring_buffer *ring, struct drm_file *file_priv, u32 flush_domains) { drm_i915_private_t *dev_priv = dev->dev_private; u32 seqno; seqno = i915_gem_get_seqno(dev); if (IS_GEN6(dev)) { BEGIN_LP_RING(6); OUT_RING(GFX_OP_PIPE_CONTROL | 3); OUT_RING(PIPE_CONTROL_QW_WRITE | PIPE_CONTROL_WC_FLUSH | PIPE_CONTROL_IS_FLUSH | PIPE_CONTROL_NOTIFY); OUT_RING(dev_priv->seqno_gfx_addr | PIPE_CONTROL_GLOBAL_GTT); OUT_RING(seqno); OUT_RING(0); OUT_RING(0); ADVANCE_LP_RING(); } else if (HAS_PIPE_CONTROL(dev)) { u32 scratch_addr = dev_priv->seqno_gfx_addr + 128; /* * Workaround qword write incoherence by flushing the * PIPE_NOTIFY buffers out to memory before requesting * an interrupt. */ BEGIN_LP_RING(32); OUT_RING(GFX_OP_PIPE_CONTROL | PIPE_CONTROL_QW_WRITE | PIPE_CONTROL_WC_FLUSH | PIPE_CONTROL_TC_FLUSH); OUT_RING(dev_priv->seqno_gfx_addr | PIPE_CONTROL_GLOBAL_GTT); OUT_RING(seqno); OUT_RING(0); PIPE_CONTROL_FLUSH(scratch_addr); scratch_addr += 128; /* write to separate cachelines */ PIPE_CONTROL_FLUSH(scratch_addr); scratch_addr += 128; PIPE_CONTROL_FLUSH(scratch_addr); scratch_addr += 128; PIPE_CONTROL_FLUSH(scratch_addr); scratch_addr += 128; PIPE_CONTROL_FLUSH(scratch_addr); scratch_addr += 128; PIPE_CONTROL_FLUSH(scratch_addr); OUT_RING(GFX_OP_PIPE_CONTROL | PIPE_CONTROL_QW_WRITE | PIPE_CONTROL_WC_FLUSH | PIPE_CONTROL_TC_FLUSH | PIPE_CONTROL_NOTIFY); OUT_RING(dev_priv->seqno_gfx_addr | PIPE_CONTROL_GLOBAL_GTT); OUT_RING(seqno); OUT_RING(0); ADVANCE_LP_RING(); } else { BEGIN_LP_RING(4); OUT_RING(MI_STORE_DWORD_INDEX); OUT_RING(I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT); OUT_RING(seqno); OUT_RING(MI_USER_INTERRUPT); ADVANCE_LP_RING(); } return seqno; } static u32 render_ring_get_gem_seqno(struct drm_device *dev, struct intel_ring_buffer *ring) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; if (HAS_PIPE_CONTROL(dev)) return ((volatile u32 *)(dev_priv->seqno_page))[0]; else return intel_read_status_page(ring, I915_GEM_HWS_INDEX); } static void render_ring_get_user_irq(struct drm_device *dev, struct intel_ring_buffer *ring) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; unsigned long irqflags; spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); if (dev->irq_enabled && (++ring->user_irq_refcount == 1)) { if (HAS_PCH_SPLIT(dev)) ironlake_enable_graphics_irq(dev_priv, GT_PIPE_NOTIFY); else i915_enable_irq(dev_priv, I915_USER_INTERRUPT); } spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); } static void render_ring_put_user_irq(struct drm_device *dev, struct intel_ring_buffer *ring) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; unsigned long irqflags; spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); BUG_ON(dev->irq_enabled && ring->user_irq_refcount <= 0); if (dev->irq_enabled && (--ring->user_irq_refcount == 0)) { if (HAS_PCH_SPLIT(dev)) ironlake_disable_graphics_irq(dev_priv, GT_PIPE_NOTIFY); else i915_disable_irq(dev_priv, I915_USER_INTERRUPT); } spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); } static void render_setup_status_page(struct drm_device *dev, struct intel_ring_buffer *ring) { drm_i915_private_t *dev_priv = dev->dev_private; if (IS_GEN6(dev)) { I915_WRITE(HWS_PGA_GEN6, ring->status_page.gfx_addr); I915_READ(HWS_PGA_GEN6); /* posting read */ } else { I915_WRITE(HWS_PGA, ring->status_page.gfx_addr); I915_READ(HWS_PGA); /* posting read */ } } static void bsd_ring_flush(struct drm_device *dev, struct intel_ring_buffer *ring, u32 invalidate_domains, u32 flush_domains) { intel_ring_begin(dev, ring, 2); intel_ring_emit(dev, ring, MI_FLUSH); intel_ring_emit(dev, ring, MI_NOOP); intel_ring_advance(dev, ring); } static unsigned int bsd_ring_get_active_head(struct drm_device *dev, struct intel_ring_buffer *ring) { drm_i915_private_t *dev_priv = dev->dev_private; return I915_READ(BSD_RING_ACTHD); } static int init_bsd_ring(struct drm_device *dev, struct intel_ring_buffer *ring) { return init_ring_common(dev, ring); } static u32 bsd_ring_add_request(struct drm_device *dev, struct intel_ring_buffer *ring, struct drm_file *file_priv, u32 flush_domains) { u32 seqno; seqno = i915_gem_get_seqno(dev); intel_ring_begin(dev, ring, 4); intel_ring_emit(dev, ring, MI_STORE_DWORD_INDEX); intel_ring_emit(dev, ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT); intel_ring_emit(dev, ring, seqno); intel_ring_emit(dev, ring, MI_USER_INTERRUPT); intel_ring_advance(dev, ring); DRM_DEBUG_DRIVER("%s %d\n", ring->name, seqno); return seqno; } static void bsd_setup_status_page(struct drm_device *dev, struct intel_ring_buffer *ring) { drm_i915_private_t *dev_priv = dev->dev_private; I915_WRITE(BSD_HWS_PGA, ring->status_page.gfx_addr); I915_READ(BSD_HWS_PGA); } static void bsd_ring_get_user_irq(struct drm_device *dev, struct intel_ring_buffer *ring) { /* do nothing */ } static void bsd_ring_put_user_irq(struct drm_device *dev, struct intel_ring_buffer *ring) { /* do nothing */ } static u32 bsd_ring_get_gem_seqno(struct drm_device *dev, struct intel_ring_buffer *ring) { return intel_read_status_page(ring, I915_GEM_HWS_INDEX); } static int bsd_ring_dispatch_gem_execbuffer(struct drm_device *dev, struct intel_ring_buffer *ring, struct drm_i915_gem_execbuffer2 *exec, struct drm_clip_rect *cliprects, uint64_t exec_offset) { uint32_t exec_start; exec_start = (uint32_t) exec_offset + exec->batch_start_offset; intel_ring_begin(dev, ring, 2); intel_ring_emit(dev, ring, MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965); intel_ring_emit(dev, ring, exec_start); intel_ring_advance(dev, ring); return 0; } static int render_ring_dispatch_gem_execbuffer(struct drm_device *dev, struct intel_ring_buffer *ring, struct drm_i915_gem_execbuffer2 *exec, struct drm_clip_rect *cliprects, uint64_t exec_offset) { drm_i915_private_t *dev_priv = dev->dev_private; int nbox = exec->num_cliprects; int i = 0, count; uint32_t exec_start, exec_len; exec_start = (uint32_t) exec_offset + exec->batch_start_offset; exec_len = (uint32_t) exec->batch_len; trace_i915_gem_request_submit(dev, dev_priv->next_seqno + 1); count = nbox ? nbox : 1; for (i = 0; i < count; i++) { if (i < nbox) { int ret = i915_emit_box(dev, cliprects, i, exec->DR1, exec->DR4); if (ret) return ret; } if (IS_I830(dev) || IS_845G(dev)) { intel_ring_begin(dev, ring, 4); intel_ring_emit(dev, ring, MI_BATCH_BUFFER); intel_ring_emit(dev, ring, exec_start | MI_BATCH_NON_SECURE); intel_ring_emit(dev, ring, exec_start + exec_len - 4); intel_ring_emit(dev, ring, 0); } else { intel_ring_begin(dev, ring, 4); if (INTEL_INFO(dev)->gen >= 4) { intel_ring_emit(dev, ring, MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965); intel_ring_emit(dev, ring, exec_start); } else { intel_ring_emit(dev, ring, MI_BATCH_BUFFER_START | (2 << 6)); intel_ring_emit(dev, ring, exec_start | MI_BATCH_NON_SECURE); } } intel_ring_advance(dev, ring); } if (IS_G4X(dev) || IS_IRONLAKE(dev)) { intel_ring_begin(dev, ring, 2); intel_ring_emit(dev, ring, MI_FLUSH | MI_NO_WRITE_FLUSH | MI_INVALIDATE_ISP ); intel_ring_emit(dev, ring, MI_NOOP); intel_ring_advance(dev, ring); } /* XXX breadcrumb */ return 0; } static void cleanup_status_page(struct drm_device *dev, struct intel_ring_buffer *ring) { drm_i915_private_t *dev_priv = dev->dev_private; struct drm_gem_object *obj; struct drm_i915_gem_object *obj_priv; obj = ring->status_page.obj; if (obj == NULL) return; obj_priv = to_intel_bo(obj); kunmap(obj_priv->pages[0]); i915_gem_object_unpin(obj); drm_gem_object_unreference(obj); ring->status_page.obj = NULL; memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map)); } static int init_status_page(struct drm_device *dev, struct intel_ring_buffer *ring) { drm_i915_private_t *dev_priv = dev->dev_private; struct drm_gem_object *obj; struct drm_i915_gem_object *obj_priv; int ret; obj = i915_gem_alloc_object(dev, 4096); if (obj == NULL) { DRM_ERROR("Failed to allocate status page\n"); ret = -ENOMEM; goto err; } obj_priv = to_intel_bo(obj); obj_priv->agp_type = AGP_USER_CACHED_MEMORY; ret = i915_gem_object_pin(obj, 4096); if (ret != 0) { goto err_unref; } ring->status_page.gfx_addr = obj_priv->gtt_offset; ring->status_page.page_addr = kmap(obj_priv->pages[0]); if (ring->status_page.page_addr == NULL) { memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map)); goto err_unpin; } ring->status_page.obj = obj; memset(ring->status_page.page_addr, 0, PAGE_SIZE); ring->setup_status_page(dev, ring); DRM_DEBUG_DRIVER("%s hws offset: 0x%08x\n", ring->name, ring->status_page.gfx_addr); return 0; err_unpin: i915_gem_object_unpin(obj); err_unref: drm_gem_object_unreference(obj); err: return ret; } int intel_init_ring_buffer(struct drm_device *dev, struct intel_ring_buffer *ring) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_gem_object *obj_priv; struct drm_gem_object *obj; int ret; ring->dev = dev; if (I915_NEED_GFX_HWS(dev)) { ret = init_status_page(dev, ring); if (ret) return ret; } obj = i915_gem_alloc_object(dev, ring->size); if (obj == NULL) { DRM_ERROR("Failed to allocate ringbuffer\n"); ret = -ENOMEM; goto err_hws; } ring->gem_object = obj; ret = i915_gem_object_pin(obj, PAGE_SIZE); if (ret) goto err_unref; obj_priv = to_intel_bo(obj); ring->map.size = ring->size; ring->map.offset = dev->agp->base + obj_priv->gtt_offset; ring->map.type = 0; ring->map.flags = 0; ring->map.mtrr = 0; drm_core_ioremap_wc(&ring->map, dev); if (ring->map.handle == NULL) { DRM_ERROR("Failed to map ringbuffer.\n"); ret = -EINVAL; goto err_unpin; } ring->virtual_start = ring->map.handle; ret = ring->init(dev, ring); if (ret) goto err_unmap; if (!drm_core_check_feature(dev, DRIVER_MODESET)) i915_kernel_lost_context(dev); else { ring->head = I915_READ_HEAD(ring) & HEAD_ADDR; ring->tail = I915_READ_TAIL(ring) & TAIL_ADDR; ring->space = ring->head - (ring->tail + 8); if (ring->space < 0) ring->space += ring->size; } INIT_LIST_HEAD(&ring->active_list); INIT_LIST_HEAD(&ring->request_list); return ret; err_unmap: drm_core_ioremapfree(&ring->map, dev); err_unpin: i915_gem_object_unpin(obj); err_unref: drm_gem_object_unreference(obj); ring->gem_object = NULL; err_hws: cleanup_status_page(dev, ring); return ret; } void intel_cleanup_ring_buffer(struct drm_device *dev, struct intel_ring_buffer *ring) { if (ring->gem_object == NULL) return; drm_core_ioremapfree(&ring->map, dev); i915_gem_object_unpin(ring->gem_object); drm_gem_object_unreference(ring->gem_object); ring->gem_object = NULL; cleanup_status_page(dev, ring); } static int intel_wrap_ring_buffer(struct drm_device *dev, struct intel_ring_buffer *ring) { unsigned int *virt; int rem; rem = ring->size - ring->tail; if (ring->space < rem) { int ret = intel_wait_ring_buffer(dev, ring, rem); if (ret) return ret; } virt = (unsigned int *)(ring->virtual_start + ring->tail); rem /= 8; while (rem--) { *virt++ = MI_NOOP; *virt++ = MI_NOOP; } ring->tail = 0; ring->space = ring->head - 8; return 0; } int intel_wait_ring_buffer(struct drm_device *dev, struct intel_ring_buffer *ring, int n) { unsigned long end; drm_i915_private_t *dev_priv = dev->dev_private; trace_i915_ring_wait_begin (dev); end = jiffies + 3 * HZ; do { ring->head = I915_READ_HEAD(ring) & HEAD_ADDR; ring->space = ring->head - (ring->tail + 8); if (ring->space < 0) ring->space += ring->size; if (ring->space >= n) { trace_i915_ring_wait_end (dev); return 0; } if (dev->primary->master) { struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; if (master_priv->sarea_priv) master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT; } yield(); } while (!time_after(jiffies, end)); trace_i915_ring_wait_end (dev); return -EBUSY; } void intel_ring_begin(struct drm_device *dev, struct intel_ring_buffer *ring, int num_dwords) { int n = 4*num_dwords; if (unlikely(ring->tail + n > ring->size)) intel_wrap_ring_buffer(dev, ring); if (unlikely(ring->space < n)) intel_wait_ring_buffer(dev, ring, n); ring->space -= n; } void intel_ring_advance(struct drm_device *dev, struct intel_ring_buffer *ring) { ring->tail &= ring->size - 1; ring->set_tail(dev, ring, ring->tail); } void intel_fill_struct(struct drm_device *dev, struct intel_ring_buffer *ring, void *data, unsigned int len) { unsigned int *virt = ring->virtual_start + ring->tail; BUG_ON((len&~(4-1)) != 0); intel_ring_begin(dev, ring, len/4); memcpy(virt, data, len); ring->tail += len; ring->tail &= ring->size - 1; ring->space -= len; intel_ring_advance(dev, ring); } static const struct intel_ring_buffer render_ring = { .name = "render ring", .id = RING_RENDER, .mmio_base = RENDER_RING_BASE, .size = 32 * PAGE_SIZE, .setup_status_page = render_setup_status_page, .init = init_render_ring, .set_tail = ring_set_tail, .get_active_head = render_ring_get_active_head, .flush = render_ring_flush, .add_request = render_ring_add_request, .get_gem_seqno = render_ring_get_gem_seqno, .user_irq_get = render_ring_get_user_irq, .user_irq_put = render_ring_put_user_irq, .dispatch_gem_execbuffer = render_ring_dispatch_gem_execbuffer, }; /* ring buffer for bit-stream decoder */ static const struct intel_ring_buffer bsd_ring = { .name = "bsd ring", .id = RING_BSD, .mmio_base = BSD_RING_BASE, .size = 32 * PAGE_SIZE, .setup_status_page = bsd_setup_status_page, .init = init_bsd_ring, .set_tail = ring_set_tail, .get_active_head = bsd_ring_get_active_head, .flush = bsd_ring_flush, .add_request = bsd_ring_add_request, .get_gem_seqno = bsd_ring_get_gem_seqno, .user_irq_get = bsd_ring_get_user_irq, .user_irq_put = bsd_ring_put_user_irq, .dispatch_gem_execbuffer = bsd_ring_dispatch_gem_execbuffer, }; static void gen6_bsd_setup_status_page(struct drm_device *dev, struct intel_ring_buffer *ring) { drm_i915_private_t *dev_priv = dev->dev_private; I915_WRITE(GEN6_BSD_HWS_PGA, ring->status_page.gfx_addr); I915_READ(GEN6_BSD_HWS_PGA); } static void gen6_bsd_ring_set_tail(struct drm_device *dev, struct intel_ring_buffer *ring, u32 value) { drm_i915_private_t *dev_priv = dev->dev_private; /* Every tail move must follow the sequence below */ I915_WRITE(GEN6_BSD_SLEEP_PSMI_CONTROL, GEN6_BSD_SLEEP_PSMI_CONTROL_RC_ILDL_MESSAGE_MODIFY_MASK | GEN6_BSD_SLEEP_PSMI_CONTROL_RC_ILDL_MESSAGE_DISABLE); I915_WRITE(GEN6_BSD_RNCID, 0x0); if (wait_for((I915_READ(GEN6_BSD_SLEEP_PSMI_CONTROL) & GEN6_BSD_SLEEP_PSMI_CONTROL_IDLE_INDICATOR) == 0, 50)) DRM_ERROR("timed out waiting for IDLE Indicator\n"); I915_WRITE_TAIL(ring, value); I915_WRITE(GEN6_BSD_SLEEP_PSMI_CONTROL, GEN6_BSD_SLEEP_PSMI_CONTROL_RC_ILDL_MESSAGE_MODIFY_MASK | GEN6_BSD_SLEEP_PSMI_CONTROL_RC_ILDL_MESSAGE_ENABLE); } static unsigned int gen6_bsd_ring_get_active_head(struct drm_device *dev, struct intel_ring_buffer *ring) { drm_i915_private_t *dev_priv = dev->dev_private; return I915_READ(GEN6_BSD_RING_ACTHD); } static void gen6_bsd_ring_flush(struct drm_device *dev, struct intel_ring_buffer *ring, u32 invalidate_domains, u32 flush_domains) { intel_ring_begin(dev, ring, 4); intel_ring_emit(dev, ring, MI_FLUSH_DW); intel_ring_emit(dev, ring, 0); intel_ring_emit(dev, ring, 0); intel_ring_emit(dev, ring, 0); intel_ring_advance(dev, ring); } static int gen6_bsd_ring_dispatch_gem_execbuffer(struct drm_device *dev, struct intel_ring_buffer *ring, struct drm_i915_gem_execbuffer2 *exec, struct drm_clip_rect *cliprects, uint64_t exec_offset) { uint32_t exec_start; exec_start = (uint32_t) exec_offset + exec->batch_start_offset; intel_ring_begin(dev, ring, 2); intel_ring_emit(dev, ring, MI_BATCH_BUFFER_START | MI_BATCH_NON_SECURE_I965); /* bit0-7 is the length on GEN6+ */ intel_ring_emit(dev, ring, exec_start); intel_ring_advance(dev, ring); return 0; } /* ring buffer for Video Codec for Gen6+ */ static const struct intel_ring_buffer gen6_bsd_ring = { .name = "gen6 bsd ring", .id = RING_BSD, .mmio_base = GEN6_BSD_RING_BASE, .size = 32 * PAGE_SIZE, .setup_status_page = gen6_bsd_setup_status_page, .init = init_bsd_ring, .set_tail = gen6_bsd_ring_set_tail, .get_active_head = gen6_bsd_ring_get_active_head, .flush = gen6_bsd_ring_flush, .add_request = bsd_ring_add_request, .get_gem_seqno = bsd_ring_get_gem_seqno, .user_irq_get = bsd_ring_get_user_irq, .user_irq_put = bsd_ring_put_user_irq, .dispatch_gem_execbuffer = gen6_bsd_ring_dispatch_gem_execbuffer, }; int intel_init_render_ring_buffer(struct drm_device *dev) { drm_i915_private_t *dev_priv = dev->dev_private; dev_priv->render_ring = render_ring; if (!I915_NEED_GFX_HWS(dev)) { dev_priv->render_ring.status_page.page_addr = dev_priv->status_page_dmah->vaddr; memset(dev_priv->render_ring.status_page.page_addr, 0, PAGE_SIZE); } return intel_init_ring_buffer(dev, &dev_priv->render_ring); } int intel_init_bsd_ring_buffer(struct drm_device *dev) { drm_i915_private_t *dev_priv = dev->dev_private; if (IS_GEN6(dev)) dev_priv->bsd_ring = gen6_bsd_ring; else dev_priv->bsd_ring = bsd_ring; return intel_init_ring_buffer(dev, &dev_priv->bsd_ring); }