diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_ringbuffer.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.c | 1931 |
1 files changed, 1931 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c new file mode 100644 index 0000000..48fe23e --- /dev/null +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -0,0 +1,1931 @@ +/* + * 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 <drm/drmP.h> +#include "i915_drv.h" +#include <drm/i915_drm.h> +#include "i915_trace.h" +#include "intel_drv.h" + +/* + * 965+ support PIPE_CONTROL commands, which provide finer grained control + * over cache flushing. + */ +struct pipe_control { + struct drm_i915_gem_object *obj; + volatile u32 *cpu_page; + u32 gtt_offset; +}; + +static inline int ring_space(struct intel_ring_buffer *ring) +{ + int space = (ring->head & HEAD_ADDR) - (ring->tail + I915_RING_FREE_SPACE); + if (space < 0) + space += ring->size; + return space; +} + +static int +gen2_render_ring_flush(struct intel_ring_buffer *ring, + u32 invalidate_domains, + u32 flush_domains) +{ + u32 cmd; + int ret; + + cmd = MI_FLUSH; + if (((invalidate_domains|flush_domains) & I915_GEM_DOMAIN_RENDER) == 0) + cmd |= MI_NO_WRITE_FLUSH; + + if (invalidate_domains & I915_GEM_DOMAIN_SAMPLER) + cmd |= MI_READ_FLUSH; + + ret = intel_ring_begin(ring, 2); + if (ret) + return ret; + + intel_ring_emit(ring, cmd); + intel_ring_emit(ring, MI_NOOP); + intel_ring_advance(ring); + + return 0; +} + +static int +gen4_render_ring_flush(struct intel_ring_buffer *ring, + u32 invalidate_domains, + u32 flush_domains) +{ + struct drm_device *dev = ring->dev; + u32 cmd; + int ret; + + /* + * read/write caches: + * + * I915_GEM_DOMAIN_RENDER is always invalidated, but is + * only flushed if MI_NO_WRITE_FLUSH is unset. On 965, it is + * also flushed at 2d versus 3d pipeline switches. + * + * read-only caches: + * + * I915_GEM_DOMAIN_SAMPLER is flushed on pre-965 if + * MI_READ_FLUSH is set, and is always flushed on 965. + * + * I915_GEM_DOMAIN_COMMAND may not exist? + * + * I915_GEM_DOMAIN_INSTRUCTION, which exists on 965, is + * invalidated when MI_EXE_FLUSH is set. + * + * I915_GEM_DOMAIN_VERTEX, which exists on 965, is + * invalidated with every MI_FLUSH. + * + * TLBs: + * + * On 965, TLBs associated with I915_GEM_DOMAIN_COMMAND + * and I915_GEM_DOMAIN_CPU in are invalidated at PTE write and + * I915_GEM_DOMAIN_RENDER and I915_GEM_DOMAIN_SAMPLER + * are flushed at any MI_FLUSH. + */ + + cmd = MI_FLUSH | MI_NO_WRITE_FLUSH; + if ((invalidate_domains|flush_domains) & I915_GEM_DOMAIN_RENDER) + cmd &= ~MI_NO_WRITE_FLUSH; + if (invalidate_domains & I915_GEM_DOMAIN_INSTRUCTION) + cmd |= MI_EXE_FLUSH; + + if (invalidate_domains & I915_GEM_DOMAIN_COMMAND && + (IS_G4X(dev) || IS_GEN5(dev))) + cmd |= MI_INVALIDATE_ISP; + + ret = intel_ring_begin(ring, 2); + if (ret) + return ret; + + intel_ring_emit(ring, cmd); + intel_ring_emit(ring, MI_NOOP); + intel_ring_advance(ring); + + 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 intel_ring_buffer *ring) +{ + struct pipe_control *pc = ring->private; + u32 scratch_addr = pc->gtt_offset + 128; + int ret; + + + ret = intel_ring_begin(ring, 6); + if (ret) + return ret; + + intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(5)); + intel_ring_emit(ring, PIPE_CONTROL_CS_STALL | + PIPE_CONTROL_STALL_AT_SCOREBOARD); + intel_ring_emit(ring, scratch_addr | PIPE_CONTROL_GLOBAL_GTT); /* address */ + intel_ring_emit(ring, 0); /* low dword */ + intel_ring_emit(ring, 0); /* high dword */ + intel_ring_emit(ring, MI_NOOP); + intel_ring_advance(ring); + + ret = intel_ring_begin(ring, 6); + if (ret) + return ret; + + intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(5)); + intel_ring_emit(ring, PIPE_CONTROL_QW_WRITE); + intel_ring_emit(ring, scratch_addr | PIPE_CONTROL_GLOBAL_GTT); /* address */ + intel_ring_emit(ring, 0); + intel_ring_emit(ring, 0); + intel_ring_emit(ring, MI_NOOP); + intel_ring_advance(ring); + + return 0; +} + +static int +gen6_render_ring_flush(struct intel_ring_buffer *ring, + u32 invalidate_domains, u32 flush_domains) +{ + u32 flags = 0; + struct pipe_control *pc = ring->private; + u32 scratch_addr = pc->gtt_offset + 128; + int ret; + + /* Force SNB workarounds for PIPE_CONTROL flushes */ + ret = intel_emit_post_sync_nonzero_flush(ring); + if (ret) + return ret; + + /* Just flush everything. Experiments have shown that reducing the + * number of bits based on the write domains has little performance + * impact. + */ + if (flush_domains) { + flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH; + flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH; + /* + * Ensure that any following seqno writes only happen + * when the render cache is indeed flushed. + */ + flags |= PIPE_CONTROL_CS_STALL; + } + if (invalidate_domains) { + flags |= PIPE_CONTROL_TLB_INVALIDATE; + flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE; + flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE; + flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE; + flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE; + flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE; + /* + * TLB invalidate requires a post-sync write. + */ + flags |= PIPE_CONTROL_QW_WRITE | PIPE_CONTROL_CS_STALL; + } + + ret = intel_ring_begin(ring, 4); + if (ret) + return ret; + + intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(4)); + intel_ring_emit(ring, flags); + intel_ring_emit(ring, scratch_addr | PIPE_CONTROL_GLOBAL_GTT); + intel_ring_emit(ring, 0); + intel_ring_advance(ring); + + return 0; +} + +static int +gen7_render_ring_cs_stall_wa(struct intel_ring_buffer *ring) +{ + int ret; + + ret = intel_ring_begin(ring, 4); + if (ret) + return ret; + + intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(4)); + intel_ring_emit(ring, PIPE_CONTROL_CS_STALL | + PIPE_CONTROL_STALL_AT_SCOREBOARD); + intel_ring_emit(ring, 0); + intel_ring_emit(ring, 0); + intel_ring_advance(ring); + + return 0; +} + +static int +gen7_render_ring_flush(struct intel_ring_buffer *ring, + u32 invalidate_domains, u32 flush_domains) +{ + u32 flags = 0; + struct pipe_control *pc = ring->private; + u32 scratch_addr = pc->gtt_offset + 128; + int ret; + + /* + * Ensure that any following seqno writes only happen when the render + * cache is indeed flushed. + * + * Workaround: 4th PIPE_CONTROL command (except the ones with only + * read-cache invalidate bits set) must have the CS_STALL bit set. We + * don't try to be clever and just set it unconditionally. + */ + flags |= PIPE_CONTROL_CS_STALL; + + /* Just flush everything. Experiments have shown that reducing the + * number of bits based on the write domains has little performance + * impact. + */ + if (flush_domains) { + flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH; + flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH; + } + if (invalidate_domains) { + flags |= PIPE_CONTROL_TLB_INVALIDATE; + flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE; + flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE; + flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE; + flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE; + flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE; + /* + * TLB invalidate requires a post-sync write. + */ + flags |= PIPE_CONTROL_QW_WRITE; + flags |= PIPE_CONTROL_GLOBAL_GTT_IVB; + + /* 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(ring); + } + + ret = intel_ring_begin(ring, 4); + if (ret) + return ret; + + intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(4)); + intel_ring_emit(ring, flags); + intel_ring_emit(ring, scratch_addr); + intel_ring_emit(ring, 0); + intel_ring_advance(ring); + + return 0; +} + +static void ring_write_tail(struct intel_ring_buffer *ring, + u32 value) +{ + drm_i915_private_t *dev_priv = ring->dev->dev_private; + I915_WRITE_TAIL(ring, value); +} + +u32 intel_ring_get_active_head(struct intel_ring_buffer *ring) +{ + drm_i915_private_t *dev_priv = ring->dev->dev_private; + u32 acthd_reg = INTEL_INFO(ring->dev)->gen >= 4 ? + RING_ACTHD(ring->mmio_base) : ACTHD; + + return I915_READ(acthd_reg); +} + +static int init_ring_common(struct intel_ring_buffer *ring) +{ + struct drm_device *dev = ring->dev; + drm_i915_private_t *dev_priv = dev->dev_private; + struct drm_i915_gem_object *obj = ring->obj; + int ret = 0; + u32 head; + + if (HAS_FORCE_WAKE(dev)) + gen6_gt_force_wake_get(dev_priv); + + /* Stop the ring if it's running. */ + I915_WRITE_CTL(ring, 0); + I915_WRITE_HEAD(ring, 0); + ring->write_tail(ring, 0); + + head = I915_READ_HEAD(ring) & HEAD_ADDR; + + /* G45 ring initialization fails to reset head to zero */ + if (head != 0) { + DRM_DEBUG_KMS("%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); + + if (I915_READ_HEAD(ring) & HEAD_ADDR) { + DRM_ERROR("failed to set %s head 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)); + } + } + + /* 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(ring, obj->gtt_offset); + I915_WRITE_CTL(ring, + ((ring->size - PAGE_SIZE) & RING_NR_PAGES) + | RING_VALID); + + /* If the head is still not zero, the ring is dead */ + if (wait_for((I915_READ_CTL(ring) & RING_VALID) != 0 && + I915_READ_START(ring) == obj->gtt_offset && + (I915_READ_HEAD(ring) & HEAD_ADDR) == 0, 50)) { + 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)); + ret = -EIO; + goto out; + } + + if (!drm_core_check_feature(ring->dev, DRIVER_MODESET)) + i915_kernel_lost_context(ring->dev); + else { + ring->head = I915_READ_HEAD(ring); + ring->tail = I915_READ_TAIL(ring) & TAIL_ADDR; + ring->space = ring_space(ring); + ring->last_retired_head = -1; + } + +out: + if (HAS_FORCE_WAKE(dev)) + gen6_gt_force_wake_put(dev_priv); + + return ret; +} + +static int +init_pipe_control(struct intel_ring_buffer *ring) +{ + struct pipe_control *pc; + struct drm_i915_gem_object *obj; + int ret; + + if (ring->private) + return 0; + + pc = kmalloc(sizeof(*pc), GFP_KERNEL); + if (!pc) + return -ENOMEM; + + obj = i915_gem_alloc_object(ring->dev, 4096); + if (obj == NULL) { + DRM_ERROR("Failed to allocate seqno page\n"); + ret = -ENOMEM; + goto err; + } + + i915_gem_object_set_cache_level(obj, I915_CACHE_LLC); + + ret = i915_gem_object_pin(obj, 4096, true, false); + if (ret) + goto err_unref; + + pc->gtt_offset = obj->gtt_offset; + pc->cpu_page = kmap(sg_page(obj->pages->sgl)); + if (pc->cpu_page == NULL) + goto err_unpin; + + DRM_DEBUG_DRIVER("%s pipe control offset: 0x%08x\n", + ring->name, pc->gtt_offset); + + pc->obj = obj; + ring->private = pc; + return 0; + +err_unpin: + i915_gem_object_unpin(obj); +err_unref: + drm_gem_object_unreference(&obj->base); +err: + kfree(pc); + return ret; +} + +static void +cleanup_pipe_control(struct intel_ring_buffer *ring) +{ + struct pipe_control *pc = ring->private; + struct drm_i915_gem_object *obj; + + obj = pc->obj; + + kunmap(sg_page(obj->pages->sgl)); + i915_gem_object_unpin(obj); + drm_gem_object_unreference(&obj->base); + + kfree(pc); +} + +static int init_render_ring(struct intel_ring_buffer *ring) +{ + struct drm_device *dev = ring->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + int ret = init_ring_common(ring); + + if (INTEL_INFO(dev)->gen > 3) + 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. + */ + if (INTEL_INFO(dev)->gen >= 6) + I915_WRITE(MI_MODE, _MASKED_BIT_ENABLE(ASYNC_FLIP_PERF_DISABLE)); + + /* Required for the hardware to program scanline values for waiting */ + if (INTEL_INFO(dev)->gen == 6) + I915_WRITE(GFX_MODE, + _MASKED_BIT_ENABLE(GFX_TLB_INVALIDATE_ALWAYS)); + + if (IS_GEN7(dev)) + I915_WRITE(GFX_MODE_GEN7, + _MASKED_BIT_DISABLE(GFX_TLB_INVALIDATE_ALWAYS) | + _MASKED_BIT_ENABLE(GFX_REPLAY_MODE)); + + if (INTEL_INFO(dev)->gen >= 5) { + ret = init_pipe_control(ring); + if (ret) + return ret; + } + + if (IS_GEN6(dev)) { + /* 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)); + + /* This is not explicitly set for GEN6, so read the register. + * see intel_ring_mi_set_context() for why we care. + * TODO: consider explicitly setting the bit for GEN5 + */ + ring->itlb_before_ctx_switch = + !!(I915_READ(GFX_MODE) & GFX_TLB_INVALIDATE_ALWAYS); + } + + if (INTEL_INFO(dev)->gen >= 6) + I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_FORCE_ORDERING)); + + if (HAS_L3_GPU_CACHE(dev)) + I915_WRITE_IMR(ring, ~GEN6_RENDER_L3_PARITY_ERROR); + + return ret; +} + +static void render_ring_cleanup(struct intel_ring_buffer *ring) +{ + struct drm_device *dev = ring->dev; + + if (!ring->private) + return; + + if (HAS_BROKEN_CS_TLB(dev)) + drm_gem_object_unreference(to_gem_object(ring->private)); + + if (INTEL_INFO(dev)->gen >= 5) + cleanup_pipe_control(ring); + + ring->private = NULL; +} + +static void +update_mboxes(struct intel_ring_buffer *ring, + u32 mmio_offset) +{ + intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1)); + intel_ring_emit(ring, mmio_offset); + intel_ring_emit(ring, ring->outstanding_lazy_request); +} + +/** + * gen6_add_request - Update the semaphore mailbox registers + * + * @ring - ring that is adding a request + * @seqno - return seqno stuck into the ring + * + * Update the mailbox registers in the *other* rings with the current seqno. + * This acts like a signal in the canonical semaphore. + */ +static int +gen6_add_request(struct intel_ring_buffer *ring) +{ + u32 mbox1_reg; + u32 mbox2_reg; + int ret; + + ret = intel_ring_begin(ring, 10); + if (ret) + return ret; + + mbox1_reg = ring->signal_mbox[0]; + mbox2_reg = ring->signal_mbox[1]; + + update_mboxes(ring, mbox1_reg); + update_mboxes(ring, mbox2_reg); + intel_ring_emit(ring, MI_STORE_DWORD_INDEX); + intel_ring_emit(ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT); + intel_ring_emit(ring, ring->outstanding_lazy_request); + intel_ring_emit(ring, MI_USER_INTERRUPT); + intel_ring_advance(ring); + + return 0; +} + +static inline bool i915_gem_has_seqno_wrapped(struct drm_device *dev, + u32 seqno) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + return dev_priv->last_seqno < seqno; +} + +/** + * intel_ring_sync - sync the waiter to the signaller on seqno + * + * @waiter - ring that is waiting + * @signaller - ring which has, or will signal + * @seqno - seqno which the waiter will block on + */ +static int +gen6_ring_sync(struct intel_ring_buffer *waiter, + struct intel_ring_buffer *signaller, + u32 seqno) +{ + int ret; + u32 dw1 = MI_SEMAPHORE_MBOX | + MI_SEMAPHORE_COMPARE | + MI_SEMAPHORE_REGISTER; + + /* Throughout all of the GEM code, seqno passed implies our current + * seqno is >= the last seqno executed. However for hardware the + * comparison is strictly greater than. + */ + seqno -= 1; + + WARN_ON(signaller->semaphore_register[waiter->id] == + MI_SEMAPHORE_SYNC_INVALID); + + ret = intel_ring_begin(waiter, 4); + if (ret) + return ret; + + /* If seqno wrap happened, omit the wait with no-ops */ + if (likely(!i915_gem_has_seqno_wrapped(waiter->dev, seqno))) { + intel_ring_emit(waiter, + dw1 | + signaller->semaphore_register[waiter->id]); + intel_ring_emit(waiter, seqno); + intel_ring_emit(waiter, 0); + intel_ring_emit(waiter, MI_NOOP); + } else { + intel_ring_emit(waiter, MI_NOOP); + intel_ring_emit(waiter, MI_NOOP); + intel_ring_emit(waiter, MI_NOOP); + intel_ring_emit(waiter, MI_NOOP); + } + intel_ring_advance(waiter); + + return 0; +} + +#define PIPE_CONTROL_FLUSH(ring__, addr__) \ +do { \ + intel_ring_emit(ring__, GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE | \ + PIPE_CONTROL_DEPTH_STALL); \ + intel_ring_emit(ring__, (addr__) | PIPE_CONTROL_GLOBAL_GTT); \ + intel_ring_emit(ring__, 0); \ + intel_ring_emit(ring__, 0); \ +} while (0) + +static int +pc_render_add_request(struct intel_ring_buffer *ring) +{ + struct pipe_control *pc = ring->private; + u32 scratch_addr = pc->gtt_offset + 128; + int ret; + + /* For Ironlake, MI_USER_INTERRUPT was deprecated and apparently + * incoherent with writes to memory, i.e. completely fubar, + * so we need to use PIPE_NOTIFY instead. + * + * However, we also need to workaround the qword write + * incoherence by flushing the 6 PIPE_NOTIFY buffers out to + * memory before requesting an interrupt. + */ + ret = intel_ring_begin(ring, 32); + if (ret) + return ret; + + intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE | + PIPE_CONTROL_WRITE_FLUSH | + PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE); + intel_ring_emit(ring, pc->gtt_offset | PIPE_CONTROL_GLOBAL_GTT); + intel_ring_emit(ring, ring->outstanding_lazy_request); + intel_ring_emit(ring, 0); + PIPE_CONTROL_FLUSH(ring, scratch_addr); + scratch_addr += 128; /* write to separate cachelines */ + PIPE_CONTROL_FLUSH(ring, scratch_addr); + scratch_addr += 128; + PIPE_CONTROL_FLUSH(ring, scratch_addr); + scratch_addr += 128; + PIPE_CONTROL_FLUSH(ring, scratch_addr); + scratch_addr += 128; + PIPE_CONTROL_FLUSH(ring, scratch_addr); + scratch_addr += 128; + PIPE_CONTROL_FLUSH(ring, scratch_addr); + + intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE | + PIPE_CONTROL_WRITE_FLUSH | + PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE | + PIPE_CONTROL_NOTIFY); + intel_ring_emit(ring, pc->gtt_offset | PIPE_CONTROL_GLOBAL_GTT); + intel_ring_emit(ring, ring->outstanding_lazy_request); + intel_ring_emit(ring, 0); + intel_ring_advance(ring); + + return 0; +} + +static u32 +gen6_ring_get_seqno(struct intel_ring_buffer *ring, bool lazy_coherency) +{ + /* 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. */ + if (!lazy_coherency) + intel_ring_get_active_head(ring); + return intel_read_status_page(ring, I915_GEM_HWS_INDEX); +} + +static u32 +ring_get_seqno(struct intel_ring_buffer *ring, bool lazy_coherency) +{ + return intel_read_status_page(ring, I915_GEM_HWS_INDEX); +} + +static void +ring_set_seqno(struct intel_ring_buffer *ring, u32 seqno) +{ + intel_write_status_page(ring, I915_GEM_HWS_INDEX, seqno); +} + +static u32 +pc_render_get_seqno(struct intel_ring_buffer *ring, bool lazy_coherency) +{ + struct pipe_control *pc = ring->private; + return pc->cpu_page[0]; +} + +static void +pc_render_set_seqno(struct intel_ring_buffer *ring, u32 seqno) +{ + struct pipe_control *pc = ring->private; + pc->cpu_page[0] = seqno; +} + +static bool +gen5_ring_get_irq(struct intel_ring_buffer *ring) +{ + struct drm_device *dev = ring->dev; + drm_i915_private_t *dev_priv = dev->dev_private; + unsigned long flags; + + if (!dev->irq_enabled) + return false; + + spin_lock_irqsave(&dev_priv->irq_lock, flags); + if (ring->irq_refcount++ == 0) { + dev_priv->gt_irq_mask &= ~ring->irq_enable_mask; + I915_WRITE(GTIMR, dev_priv->gt_irq_mask); + POSTING_READ(GTIMR); + } + spin_unlock_irqrestore(&dev_priv->irq_lock, flags); + + return true; +} + +static void +gen5_ring_put_irq(struct intel_ring_buffer *ring) +{ + struct drm_device *dev = ring->dev; + drm_i915_private_t *dev_priv = dev->dev_private; + unsigned long flags; + + spin_lock_irqsave(&dev_priv->irq_lock, flags); + if (--ring->irq_refcount == 0) { + dev_priv->gt_irq_mask |= ring->irq_enable_mask; + I915_WRITE(GTIMR, dev_priv->gt_irq_mask); + POSTING_READ(GTIMR); + } + spin_unlock_irqrestore(&dev_priv->irq_lock, flags); +} + +static bool +i9xx_ring_get_irq(struct intel_ring_buffer *ring) +{ + struct drm_device *dev = ring->dev; + drm_i915_private_t *dev_priv = dev->dev_private; + unsigned long flags; + + if (!dev->irq_enabled) + return false; + + spin_lock_irqsave(&dev_priv->irq_lock, flags); + if (ring->irq_refcount++ == 0) { + dev_priv->irq_mask &= ~ring->irq_enable_mask; + I915_WRITE(IMR, dev_priv->irq_mask); + POSTING_READ(IMR); + } + spin_unlock_irqrestore(&dev_priv->irq_lock, flags); + + return true; +} + +static void +i9xx_ring_put_irq(struct intel_ring_buffer *ring) +{ + struct drm_device *dev = ring->dev; + drm_i915_private_t *dev_priv = dev->dev_private; + unsigned long flags; + + spin_lock_irqsave(&dev_priv->irq_lock, flags); + if (--ring->irq_refcount == 0) { + dev_priv->irq_mask |= ring->irq_enable_mask; + I915_WRITE(IMR, dev_priv->irq_mask); + POSTING_READ(IMR); + } + spin_unlock_irqrestore(&dev_priv->irq_lock, flags); +} + +static bool +i8xx_ring_get_irq(struct intel_ring_buffer *ring) +{ + struct drm_device *dev = ring->dev; + drm_i915_private_t *dev_priv = dev->dev_private; + unsigned long flags; + + if (!dev->irq_enabled) + return false; + + spin_lock_irqsave(&dev_priv->irq_lock, flags); + if (ring->irq_refcount++ == 0) { + dev_priv->irq_mask &= ~ring->irq_enable_mask; + I915_WRITE16(IMR, dev_priv->irq_mask); + POSTING_READ16(IMR); + } + spin_unlock_irqrestore(&dev_priv->irq_lock, flags); + + return true; +} + +static void +i8xx_ring_put_irq(struct intel_ring_buffer *ring) +{ + struct drm_device *dev = ring->dev; + drm_i915_private_t *dev_priv = dev->dev_private; + unsigned long flags; + + spin_lock_irqsave(&dev_priv->irq_lock, flags); + if (--ring->irq_refcount == 0) { + dev_priv->irq_mask |= ring->irq_enable_mask; + I915_WRITE16(IMR, dev_priv->irq_mask); + POSTING_READ16(IMR); + } + spin_unlock_irqrestore(&dev_priv->irq_lock, flags); +} + +void intel_ring_setup_status_page(struct intel_ring_buffer *ring) +{ + struct drm_device *dev = ring->dev; + drm_i915_private_t *dev_priv = ring->dev->dev_private; + u32 mmio = 0; + + /* The ring status page addresses are no longer next to the rest of + * the ring registers as of gen7. + */ + if (IS_GEN7(dev)) { + switch (ring->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; + } + } else if (IS_GEN6(ring->dev)) { + mmio = RING_HWS_PGA_GEN6(ring->mmio_base); + } else { + mmio = RING_HWS_PGA(ring->mmio_base); + } + + I915_WRITE(mmio, (u32)ring->status_page.gfx_addr); + POSTING_READ(mmio); + + /* Flush the TLB for this page */ + if (INTEL_INFO(dev)->gen >= 6) { + u32 reg = RING_INSTPM(ring->mmio_base); + I915_WRITE(reg, + _MASKED_BIT_ENABLE(INSTPM_TLB_INVALIDATE | + INSTPM_SYNC_FLUSH)); + if (wait_for((I915_READ(reg) & INSTPM_SYNC_FLUSH) == 0, + 1000)) + DRM_ERROR("%s: wait for SyncFlush to complete for TLB invalidation timed out\n", + ring->name); + } +} + +static int +bsd_ring_flush(struct intel_ring_buffer *ring, + u32 invalidate_domains, + u32 flush_domains) +{ + int ret; + + ret = intel_ring_begin(ring, 2); + if (ret) + return ret; + + intel_ring_emit(ring, MI_FLUSH); + intel_ring_emit(ring, MI_NOOP); + intel_ring_advance(ring); + return 0; +} + +static int +i9xx_add_request(struct intel_ring_buffer *ring) +{ + int ret; + + ret = intel_ring_begin(ring, 4); + if (ret) + return ret; + + intel_ring_emit(ring, MI_STORE_DWORD_INDEX); + intel_ring_emit(ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT); + intel_ring_emit(ring, ring->outstanding_lazy_request); + intel_ring_emit(ring, MI_USER_INTERRUPT); + intel_ring_advance(ring); + + return 0; +} + +static bool +gen6_ring_get_irq(struct intel_ring_buffer *ring) +{ + struct drm_device *dev = ring->dev; + drm_i915_private_t *dev_priv = dev->dev_private; + unsigned long flags; + + if (!dev->irq_enabled) + return false; + + /* It looks like we need to prevent the gt from suspending while waiting + * for an notifiy irq, otherwise irqs seem to get lost on at least the + * blt/bsd rings on ivb. */ + gen6_gt_force_wake_get(dev_priv); + + spin_lock_irqsave(&dev_priv->irq_lock, flags); + if (ring->irq_refcount++ == 0) { + if (HAS_L3_GPU_CACHE(dev) && ring->id == RCS) + I915_WRITE_IMR(ring, ~(ring->irq_enable_mask | + GEN6_RENDER_L3_PARITY_ERROR)); + else + I915_WRITE_IMR(ring, ~ring->irq_enable_mask); + dev_priv->gt_irq_mask &= ~ring->irq_enable_mask; + I915_WRITE(GTIMR, dev_priv->gt_irq_mask); + POSTING_READ(GTIMR); + } + spin_unlock_irqrestore(&dev_priv->irq_lock, flags); + + return true; +} + +static void +gen6_ring_put_irq(struct intel_ring_buffer *ring) +{ + struct drm_device *dev = ring->dev; + drm_i915_private_t *dev_priv = dev->dev_private; + unsigned long flags; + + spin_lock_irqsave(&dev_priv->irq_lock, flags); + if (--ring->irq_refcount == 0) { + if (HAS_L3_GPU_CACHE(dev) && ring->id == RCS) + I915_WRITE_IMR(ring, ~GEN6_RENDER_L3_PARITY_ERROR); + else + I915_WRITE_IMR(ring, ~0); + dev_priv->gt_irq_mask |= ring->irq_enable_mask; + I915_WRITE(GTIMR, dev_priv->gt_irq_mask); + POSTING_READ(GTIMR); + } + spin_unlock_irqrestore(&dev_priv->irq_lock, flags); + + gen6_gt_force_wake_put(dev_priv); +} + +static int +i965_dispatch_execbuffer(struct intel_ring_buffer *ring, + u32 offset, u32 length, + unsigned flags) +{ + int ret; + + ret = intel_ring_begin(ring, 2); + if (ret) + return ret; + + intel_ring_emit(ring, + MI_BATCH_BUFFER_START | + MI_BATCH_GTT | + (flags & I915_DISPATCH_SECURE ? 0 : MI_BATCH_NON_SECURE_I965)); + intel_ring_emit(ring, offset); + intel_ring_advance(ring); + + return 0; +} + +/* Just userspace ABI convention to limit the wa batch bo to a resonable size */ +#define I830_BATCH_LIMIT (256*1024) +static int +i830_dispatch_execbuffer(struct intel_ring_buffer *ring, + u32 offset, u32 len, + unsigned flags) +{ + int ret; + + if (flags & I915_DISPATCH_PINNED) { + ret = intel_ring_begin(ring, 4); + if (ret) + return ret; + + intel_ring_emit(ring, MI_BATCH_BUFFER); + intel_ring_emit(ring, offset | (flags & I915_DISPATCH_SECURE ? 0 : MI_BATCH_NON_SECURE)); + intel_ring_emit(ring, offset + len - 8); + intel_ring_emit(ring, MI_NOOP); + intel_ring_advance(ring); + } else { + struct drm_i915_gem_object *obj = ring->private; + u32 cs_offset = obj->gtt_offset; + + if (len > I830_BATCH_LIMIT) + return -ENOSPC; + + ret = intel_ring_begin(ring, 9+3); + if (ret) + return ret; + /* Blit the batch (which has now all relocs applied) to the stable batch + * scratch bo area (so that the CS never stumbles over its tlb + * invalidation bug) ... */ + intel_ring_emit(ring, XY_SRC_COPY_BLT_CMD | + XY_SRC_COPY_BLT_WRITE_ALPHA | + XY_SRC_COPY_BLT_WRITE_RGB); + intel_ring_emit(ring, BLT_DEPTH_32 | BLT_ROP_GXCOPY | 4096); + intel_ring_emit(ring, 0); + intel_ring_emit(ring, (DIV_ROUND_UP(len, 4096) << 16) | 1024); + intel_ring_emit(ring, cs_offset); + intel_ring_emit(ring, 0); + intel_ring_emit(ring, 4096); + intel_ring_emit(ring, offset); + intel_ring_emit(ring, MI_FLUSH); + + /* ... and execute it. */ + intel_ring_emit(ring, MI_BATCH_BUFFER); + intel_ring_emit(ring, cs_offset | (flags & I915_DISPATCH_SECURE ? 0 : MI_BATCH_NON_SECURE)); + intel_ring_emit(ring, cs_offset + len - 8); + intel_ring_advance(ring); + } + + return 0; +} + +static int +i915_dispatch_execbuffer(struct intel_ring_buffer *ring, + u32 offset, u32 len, + unsigned flags) +{ + int ret; + + ret = intel_ring_begin(ring, 2); + if (ret) + return ret; + + intel_ring_emit(ring, MI_BATCH_BUFFER_START | MI_BATCH_GTT); + intel_ring_emit(ring, offset | (flags & I915_DISPATCH_SECURE ? 0 : MI_BATCH_NON_SECURE)); + intel_ring_advance(ring); + + return 0; +} + +static void cleanup_status_page(struct intel_ring_buffer *ring) +{ + struct drm_i915_gem_object *obj; + + obj = ring->status_page.obj; + if (obj == NULL) + return; + + kunmap(sg_page(obj->pages->sgl)); + i915_gem_object_unpin(obj); + drm_gem_object_unreference(&obj->base); + ring->status_page.obj = NULL; +} + +static int init_status_page(struct intel_ring_buffer *ring) +{ + struct drm_device *dev = ring->dev; + struct drm_i915_gem_object *obj; + int ret; + + obj = i915_gem_alloc_object(dev, 4096); + if (obj == NULL) { + DRM_ERROR("Failed to allocate status page\n"); + ret = -ENOMEM; + goto err; + } + + i915_gem_object_set_cache_level(obj, I915_CACHE_LLC); + + ret = i915_gem_object_pin(obj, 4096, true, false); + if (ret != 0) { + goto err_unref; + } + + ring->status_page.gfx_addr = obj->gtt_offset; + ring->status_page.page_addr = kmap(sg_page(obj->pages->sgl)); + if (ring->status_page.page_addr == NULL) { + ret = -ENOMEM; + goto err_unpin; + } + ring->status_page.obj = obj; + memset(ring->status_page.page_addr, 0, PAGE_SIZE); + + intel_ring_setup_status_page(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->base); +err: + return ret; +} + +static int init_phys_hws_pga(struct intel_ring_buffer *ring) +{ + struct drm_i915_private *dev_priv = ring->dev->dev_private; + u32 addr; + + if (!dev_priv->status_page_dmah) { + dev_priv->status_page_dmah = + drm_pci_alloc(ring->dev, PAGE_SIZE, PAGE_SIZE); + if (!dev_priv->status_page_dmah) + return -ENOMEM; + } + + addr = dev_priv->status_page_dmah->busaddr; + if (INTEL_INFO(ring->dev)->gen >= 4) + addr |= (dev_priv->status_page_dmah->busaddr >> 28) & 0xf0; + I915_WRITE(HWS_PGA, addr); + + ring->status_page.page_addr = dev_priv->status_page_dmah->vaddr; + memset(ring->status_page.page_addr, 0, PAGE_SIZE); + + return 0; +} + +static int intel_init_ring_buffer(struct drm_device *dev, + struct intel_ring_buffer *ring) +{ + struct drm_i915_gem_object *obj; + struct drm_i915_private *dev_priv = dev->dev_private; + int ret; + + ring->dev = dev; + INIT_LIST_HEAD(&ring->active_list); + INIT_LIST_HEAD(&ring->request_list); + ring->size = 32 * PAGE_SIZE; + memset(ring->sync_seqno, 0, sizeof(ring->sync_seqno)); + + init_waitqueue_head(&ring->irq_queue); + + if (I915_NEED_GFX_HWS(dev)) { + ret = init_status_page(ring); + if (ret) + return ret; + } else { + BUG_ON(ring->id != RCS); + ret = init_phys_hws_pga(ring); + if (ret) + return ret; + } + + obj = NULL; + if (!HAS_LLC(dev)) + obj = i915_gem_object_create_stolen(dev, ring->size); + if (obj == NULL) + obj = i915_gem_alloc_object(dev, ring->size); + if (obj == NULL) { + DRM_ERROR("Failed to allocate ringbuffer\n"); + ret = -ENOMEM; + goto err_hws; + } + + ring->obj = obj; + + ret = i915_gem_object_pin(obj, PAGE_SIZE, true, false); + if (ret) + goto err_unref; + + ret = i915_gem_object_set_to_gtt_domain(obj, true); + if (ret) + goto err_unpin; + + ring->virtual_start = + ioremap_wc(dev_priv->gtt.mappable_base + obj->gtt_offset, + ring->size); + if (ring->virtual_start == NULL) { + DRM_ERROR("Failed to map ringbuffer.\n"); + ret = -EINVAL; + goto err_unpin; + } + + ret = ring->init(ring); + if (ret) + goto err_unmap; + + /* 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 = ring->size; + if (IS_I830(ring->dev) || IS_845G(ring->dev)) + ring->effective_size -= 128; + + return 0; + +err_unmap: + iounmap(ring->virtual_start); +err_unpin: + i915_gem_object_unpin(obj); +err_unref: + drm_gem_object_unreference(&obj->base); + ring->obj = NULL; +err_hws: + cleanup_status_page(ring); + return ret; +} + +void intel_cleanup_ring_buffer(struct intel_ring_buffer *ring) +{ + struct drm_i915_private *dev_priv; + int ret; + + if (ring->obj == NULL) + return; + + /* Disable the ring buffer. The ring must be idle at this point */ + dev_priv = ring->dev->dev_private; + ret = intel_ring_idle(ring); + if (ret) + DRM_ERROR("failed to quiesce %s whilst cleaning up: %d\n", + ring->name, ret); + + I915_WRITE_CTL(ring, 0); + + iounmap(ring->virtual_start); + + i915_gem_object_unpin(ring->obj); + drm_gem_object_unreference(&ring->obj->base); + ring->obj = NULL; + + if (ring->cleanup) + ring->cleanup(ring); + + cleanup_status_page(ring); +} + +static int intel_ring_wait_seqno(struct intel_ring_buffer *ring, u32 seqno) +{ + int ret; + + ret = i915_wait_seqno(ring, seqno); + if (!ret) + i915_gem_retire_requests_ring(ring); + + return ret; +} + +static int intel_ring_wait_request(struct intel_ring_buffer *ring, int n) +{ + struct drm_i915_gem_request *request; + u32 seqno = 0; + int ret; + + i915_gem_retire_requests_ring(ring); + + if (ring->last_retired_head != -1) { + ring->head = ring->last_retired_head; + ring->last_retired_head = -1; + ring->space = ring_space(ring); + if (ring->space >= n) + return 0; + } + + list_for_each_entry(request, &ring->request_list, list) { + int space; + + if (request->tail == -1) + continue; + + space = request->tail - (ring->tail + I915_RING_FREE_SPACE); + if (space < 0) + space += ring->size; + if (space >= n) { + seqno = request->seqno; + break; + } + + /* Consume this request in case we need more space than + * is available and so need to prevent a race between + * updating last_retired_head and direct reads of + * I915_RING_HEAD. It also provides a nice sanity check. + */ + request->tail = -1; + } + + if (seqno == 0) + return -ENOSPC; + + ret = intel_ring_wait_seqno(ring, seqno); + if (ret) + return ret; + + if (WARN_ON(ring->last_retired_head == -1)) + return -ENOSPC; + + ring->head = ring->last_retired_head; + ring->last_retired_head = -1; + ring->space = ring_space(ring); + if (WARN_ON(ring->space < n)) + return -ENOSPC; + + return 0; +} + +static int ring_wait_for_space(struct intel_ring_buffer *ring, int n) +{ + struct drm_device *dev = ring->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + unsigned long end; + int ret; + + ret = intel_ring_wait_request(ring, n); + if (ret != -ENOSPC) + return ret; + + trace_i915_ring_wait_begin(ring); + /* With GEM the hangcheck timer should kick us out of the loop, + * leaving it early runs the risk of corrupting GEM state (due + * to running on almost untested codepaths). But on resume + * timers don't work yet, so prevent a complete hang in that + * case by choosing an insanely large timeout. */ + end = jiffies + 60 * HZ; + + do { + ring->head = I915_READ_HEAD(ring); + ring->space = ring_space(ring); + if (ring->space >= n) { + trace_i915_ring_wait_end(ring); + 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; + } + + msleep(1); + + ret = i915_gem_check_wedge(&dev_priv->gpu_error, + dev_priv->mm.interruptible); + if (ret) + return ret; + } while (!time_after(jiffies, end)); + trace_i915_ring_wait_end(ring); + return -EBUSY; +} + +static int intel_wrap_ring_buffer(struct intel_ring_buffer *ring) +{ + uint32_t __iomem *virt; + int rem = ring->size - ring->tail; + + if (ring->space < rem) { + int ret = ring_wait_for_space(ring, rem); + if (ret) + return ret; + } + + virt = ring->virtual_start + ring->tail; + rem /= 4; + while (rem--) + iowrite32(MI_NOOP, virt++); + + ring->tail = 0; + ring->space = ring_space(ring); + + return 0; +} + +int intel_ring_idle(struct intel_ring_buffer *ring) +{ + u32 seqno; + int ret; + + /* We need to add any requests required to flush the objects and ring */ + if (ring->outstanding_lazy_request) { + ret = i915_add_request(ring, NULL, NULL); + if (ret) + return ret; + } + + /* Wait upon the last request to be completed */ + if (list_empty(&ring->request_list)) + return 0; + + seqno = list_entry(ring->request_list.prev, + struct drm_i915_gem_request, + list)->seqno; + + return i915_wait_seqno(ring, seqno); +} + +static int +intel_ring_alloc_seqno(struct intel_ring_buffer *ring) +{ + if (ring->outstanding_lazy_request) + return 0; + + return i915_gem_get_seqno(ring->dev, &ring->outstanding_lazy_request); +} + +static int __intel_ring_begin(struct intel_ring_buffer *ring, + int bytes) +{ + int ret; + + if (unlikely(ring->tail + bytes > ring->effective_size)) { + ret = intel_wrap_ring_buffer(ring); + if (unlikely(ret)) + return ret; + } + + if (unlikely(ring->space < bytes)) { + ret = ring_wait_for_space(ring, bytes); + if (unlikely(ret)) + return ret; + } + + ring->space -= bytes; + return 0; +} + +int intel_ring_begin(struct intel_ring_buffer *ring, + int num_dwords) +{ + drm_i915_private_t *dev_priv = ring->dev->dev_private; + int ret; + + ret = i915_gem_check_wedge(&dev_priv->gpu_error, + dev_priv->mm.interruptible); + if (ret) + return ret; + + /* Preallocate the olr before touching the ring */ + ret = intel_ring_alloc_seqno(ring); + if (ret) + return ret; + + return __intel_ring_begin(ring, num_dwords * sizeof(uint32_t)); +} + +void intel_ring_init_seqno(struct intel_ring_buffer *ring, u32 seqno) +{ + struct drm_i915_private *dev_priv = ring->dev->dev_private; + + BUG_ON(ring->outstanding_lazy_request); + + if (INTEL_INFO(ring->dev)->gen >= 6) { + I915_WRITE(RING_SYNC_0(ring->mmio_base), 0); + I915_WRITE(RING_SYNC_1(ring->mmio_base), 0); + } + + ring->set_seqno(ring, seqno); +} + +void intel_ring_advance(struct intel_ring_buffer *ring) +{ + struct drm_i915_private *dev_priv = ring->dev->dev_private; + + ring->tail &= ring->size - 1; + if (dev_priv->gpu_error.stop_rings & intel_ring_flag(ring)) + return; + ring->write_tail(ring, ring->tail); +} + + +static void gen6_bsd_ring_write_tail(struct intel_ring_buffer *ring, + u32 value) +{ + drm_i915_private_t *dev_priv = ring->dev->dev_private; + + /* 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(GEN6_BSD_SLEEP_PSMI_CONTROL, + _MASKED_BIT_ENABLE(GEN6_BSD_SLEEP_MSG_DISABLE)); + + /* Clear the context id. Here be magic! */ + I915_WRITE64(GEN6_BSD_RNCID, 0x0); + + /* Wait for the ring not to be idle, i.e. for it to wake up. */ + if (wait_for((I915_READ(GEN6_BSD_SLEEP_PSMI_CONTROL) & + GEN6_BSD_SLEEP_INDICATOR) == 0, + 50)) + DRM_ERROR("timed out waiting for the BSD ring to wake up\n"); + + /* Now that the ring is fully powered up, update the tail */ + I915_WRITE_TAIL(ring, value); + POSTING_READ(RING_TAIL(ring->mmio_base)); + + /* Let the ring send IDLE messages to the GT again, + * and so let it sleep to conserve power when idle. + */ + I915_WRITE(GEN6_BSD_SLEEP_PSMI_CONTROL, + _MASKED_BIT_DISABLE(GEN6_BSD_SLEEP_MSG_DISABLE)); +} + +static int gen6_ring_flush(struct intel_ring_buffer *ring, + u32 invalidate, u32 flush) +{ + uint32_t cmd; + int ret; + + ret = intel_ring_begin(ring, 4); + if (ret) + return ret; + + cmd = MI_FLUSH_DW; + /* + * Bspec vol 1c.5 - video engine command streamer: + * "If ENABLED, all TLBs will be invalidated once the flush + * operation is complete. This bit is only valid when the + * Post-Sync Operation field is a value of 1h or 3h." + */ + if (invalidate & I915_GEM_GPU_DOMAINS) + cmd |= MI_INVALIDATE_TLB | MI_INVALIDATE_BSD | + MI_FLUSH_DW_STORE_INDEX | MI_FLUSH_DW_OP_STOREDW; + intel_ring_emit(ring, cmd); + intel_ring_emit(ring, I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT); + intel_ring_emit(ring, 0); + intel_ring_emit(ring, MI_NOOP); + intel_ring_advance(ring); + return 0; +} + +static int +hsw_ring_dispatch_execbuffer(struct intel_ring_buffer *ring, + u32 offset, u32 len, + unsigned flags) +{ + int ret; + + ret = intel_ring_begin(ring, 2); + if (ret) + return ret; + + intel_ring_emit(ring, + MI_BATCH_BUFFER_START | MI_BATCH_PPGTT_HSW | + (flags & I915_DISPATCH_SECURE ? 0 : MI_BATCH_NON_SECURE_HSW)); + /* bit0-7 is the length on GEN6+ */ + intel_ring_emit(ring, offset); + intel_ring_advance(ring); + + return 0; +} + +static int +gen6_ring_dispatch_execbuffer(struct intel_ring_buffer *ring, + u32 offset, u32 len, + unsigned flags) +{ + int ret; + + ret = intel_ring_begin(ring, 2); + if (ret) + return ret; + + intel_ring_emit(ring, + MI_BATCH_BUFFER_START | + (flags & I915_DISPATCH_SECURE ? 0 : MI_BATCH_NON_SECURE_I965)); + /* bit0-7 is the length on GEN6+ */ + intel_ring_emit(ring, offset); + intel_ring_advance(ring); + + return 0; +} + +/* Blitter support (SandyBridge+) */ + +static int blt_ring_flush(struct intel_ring_buffer *ring, + u32 invalidate, u32 flush) +{ + uint32_t cmd; + int ret; + + ret = intel_ring_begin(ring, 4); + if (ret) + return ret; + + cmd = MI_FLUSH_DW; + /* + * Bspec vol 1c.3 - blitter engine command streamer: + * "If ENABLED, all TLBs will be invalidated once the flush + * operation is complete. This bit is only valid when the + * Post-Sync Operation field is a value of 1h or 3h." + */ + if (invalidate & I915_GEM_DOMAIN_RENDER) + cmd |= MI_INVALIDATE_TLB | MI_FLUSH_DW_STORE_INDEX | + MI_FLUSH_DW_OP_STOREDW; + intel_ring_emit(ring, cmd); + intel_ring_emit(ring, I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT); + intel_ring_emit(ring, 0); + intel_ring_emit(ring, MI_NOOP); + intel_ring_advance(ring); + return 0; +} + +int intel_init_render_ring_buffer(struct drm_device *dev) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + struct intel_ring_buffer *ring = &dev_priv->ring[RCS]; + + ring->name = "render ring"; + ring->id = RCS; + ring->mmio_base = RENDER_RING_BASE; + + if (INTEL_INFO(dev)->gen >= 6) { + ring->add_request = gen6_add_request; + ring->flush = gen7_render_ring_flush; + if (INTEL_INFO(dev)->gen == 6) + ring->flush = gen6_render_ring_flush; + ring->irq_get = gen6_ring_get_irq; + ring->irq_put = gen6_ring_put_irq; + ring->irq_enable_mask = GT_USER_INTERRUPT; + ring->get_seqno = gen6_ring_get_seqno; + ring->set_seqno = ring_set_seqno; + ring->sync_to = gen6_ring_sync; + ring->semaphore_register[0] = MI_SEMAPHORE_SYNC_INVALID; + ring->semaphore_register[1] = MI_SEMAPHORE_SYNC_RV; + ring->semaphore_register[2] = MI_SEMAPHORE_SYNC_RB; + ring->signal_mbox[0] = GEN6_VRSYNC; + ring->signal_mbox[1] = GEN6_BRSYNC; + } else if (IS_GEN5(dev)) { + ring->add_request = pc_render_add_request; + ring->flush = gen4_render_ring_flush; + ring->get_seqno = pc_render_get_seqno; + ring->set_seqno = pc_render_set_seqno; + ring->irq_get = gen5_ring_get_irq; + ring->irq_put = gen5_ring_put_irq; + ring->irq_enable_mask = GT_USER_INTERRUPT | GT_PIPE_NOTIFY; + } else { + ring->add_request = i9xx_add_request; + if (INTEL_INFO(dev)->gen < 4) + ring->flush = gen2_render_ring_flush; + else + ring->flush = gen4_render_ring_flush; + ring->get_seqno = ring_get_seqno; + ring->set_seqno = ring_set_seqno; + if (IS_GEN2(dev)) { + ring->irq_get = i8xx_ring_get_irq; + ring->irq_put = i8xx_ring_put_irq; + } else { + ring->irq_get = i9xx_ring_get_irq; + ring->irq_put = i9xx_ring_put_irq; + } + ring->irq_enable_mask = I915_USER_INTERRUPT; + } + ring->write_tail = ring_write_tail; + if (IS_HASWELL(dev)) + ring->dispatch_execbuffer = hsw_ring_dispatch_execbuffer; + else if (INTEL_INFO(dev)->gen >= 6) + ring->dispatch_execbuffer = gen6_ring_dispatch_execbuffer; + else if (INTEL_INFO(dev)->gen >= 4) + ring->dispatch_execbuffer = i965_dispatch_execbuffer; + else if (IS_I830(dev) || IS_845G(dev)) + ring->dispatch_execbuffer = i830_dispatch_execbuffer; + else + ring->dispatch_execbuffer = i915_dispatch_execbuffer; + ring->init = init_render_ring; + ring->cleanup = render_ring_cleanup; + + /* Workaround batchbuffer to combat CS tlb bug. */ + if (HAS_BROKEN_CS_TLB(dev)) { + struct drm_i915_gem_object *obj; + int ret; + + obj = i915_gem_alloc_object(dev, I830_BATCH_LIMIT); + if (obj == NULL) { + DRM_ERROR("Failed to allocate batch bo\n"); + return -ENOMEM; + } + + ret = i915_gem_object_pin(obj, 0, true, false); + if (ret != 0) { + drm_gem_object_unreference(&obj->base); + DRM_ERROR("Failed to ping batch bo\n"); + return ret; + } + + ring->private = obj; + } + + return intel_init_ring_buffer(dev, ring); +} + +int intel_render_ring_init_dri(struct drm_device *dev, u64 start, u32 size) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + struct intel_ring_buffer *ring = &dev_priv->ring[RCS]; + int ret; + + ring->name = "render ring"; + ring->id = RCS; + ring->mmio_base = RENDER_RING_BASE; + + if (INTEL_INFO(dev)->gen >= 6) { + /* non-kms not supported on gen6+ */ + return -ENODEV; + } + + /* Note: gem is not supported on gen5/ilk without kms (the corresponding + * gem_init ioctl returns with -ENODEV). Hence we do not need to set up + * the special gen5 functions. */ + ring->add_request = i9xx_add_request; + if (INTEL_INFO(dev)->gen < 4) + ring->flush = gen2_render_ring_flush; + else + ring->flush = gen4_render_ring_flush; + ring->get_seqno = ring_get_seqno; + ring->set_seqno = ring_set_seqno; + if (IS_GEN2(dev)) { + ring->irq_get = i8xx_ring_get_irq; + ring->irq_put = i8xx_ring_put_irq; + } else { + ring->irq_get = i9xx_ring_get_irq; + ring->irq_put = i9xx_ring_put_irq; + } + ring->irq_enable_mask = I915_USER_INTERRUPT; + ring->write_tail = ring_write_tail; + if (INTEL_INFO(dev)->gen >= 4) + ring->dispatch_execbuffer = i965_dispatch_execbuffer; + else if (IS_I830(dev) || IS_845G(dev)) + ring->dispatch_execbuffer = i830_dispatch_execbuffer; + else + ring->dispatch_execbuffer = i915_dispatch_execbuffer; + ring->init = init_render_ring; + ring->cleanup = render_ring_cleanup; + + ring->dev = dev; + INIT_LIST_HEAD(&ring->active_list); + INIT_LIST_HEAD(&ring->request_list); + + ring->size = size; + ring->effective_size = ring->size; + if (IS_I830(ring->dev) || IS_845G(ring->dev)) + ring->effective_size -= 128; + + ring->virtual_start = ioremap_wc(start, size); + if (ring->virtual_start == NULL) { + DRM_ERROR("can not ioremap virtual address for" + " ring buffer\n"); + return -ENOMEM; + } + + if (!I915_NEED_GFX_HWS(dev)) { + ret = init_phys_hws_pga(ring); + if (ret) + return ret; + } + + return 0; +} + +int intel_init_bsd_ring_buffer(struct drm_device *dev) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + struct intel_ring_buffer *ring = &dev_priv->ring[VCS]; + + ring->name = "bsd ring"; + ring->id = VCS; + + ring->write_tail = ring_write_tail; + if (IS_GEN6(dev) || IS_GEN7(dev)) { + ring->mmio_base = GEN6_BSD_RING_BASE; + /* gen6 bsd needs a special wa for tail updates */ + if (IS_GEN6(dev)) + ring->write_tail = gen6_bsd_ring_write_tail; + ring->flush = gen6_ring_flush; + ring->add_request = gen6_add_request; + ring->get_seqno = gen6_ring_get_seqno; + ring->set_seqno = ring_set_seqno; + ring->irq_enable_mask = GEN6_BSD_USER_INTERRUPT; + ring->irq_get = gen6_ring_get_irq; + ring->irq_put = gen6_ring_put_irq; + ring->dispatch_execbuffer = gen6_ring_dispatch_execbuffer; + ring->sync_to = gen6_ring_sync; + ring->semaphore_register[0] = MI_SEMAPHORE_SYNC_VR; + ring->semaphore_register[1] = MI_SEMAPHORE_SYNC_INVALID; + ring->semaphore_register[2] = MI_SEMAPHORE_SYNC_VB; + ring->signal_mbox[0] = GEN6_RVSYNC; + ring->signal_mbox[1] = GEN6_BVSYNC; + } else { + ring->mmio_base = BSD_RING_BASE; + ring->flush = bsd_ring_flush; + ring->add_request = i9xx_add_request; + ring->get_seqno = ring_get_seqno; + ring->set_seqno = ring_set_seqno; + if (IS_GEN5(dev)) { + ring->irq_enable_mask = GT_BSD_USER_INTERRUPT; + ring->irq_get = gen5_ring_get_irq; + ring->irq_put = gen5_ring_put_irq; + } else { + ring->irq_enable_mask = I915_BSD_USER_INTERRUPT; + ring->irq_get = i9xx_ring_get_irq; + ring->irq_put = i9xx_ring_put_irq; + } + ring->dispatch_execbuffer = i965_dispatch_execbuffer; + } + ring->init = init_ring_common; + + return intel_init_ring_buffer(dev, ring); +} + +int intel_init_blt_ring_buffer(struct drm_device *dev) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + struct intel_ring_buffer *ring = &dev_priv->ring[BCS]; + + ring->name = "blitter ring"; + ring->id = BCS; + + ring->mmio_base = BLT_RING_BASE; + ring->write_tail = ring_write_tail; + ring->flush = blt_ring_flush; + ring->add_request = gen6_add_request; + ring->get_seqno = gen6_ring_get_seqno; + ring->set_seqno = ring_set_seqno; + ring->irq_enable_mask = GEN6_BLITTER_USER_INTERRUPT; + ring->irq_get = gen6_ring_get_irq; + ring->irq_put = gen6_ring_put_irq; + ring->dispatch_execbuffer = gen6_ring_dispatch_execbuffer; + ring->sync_to = gen6_ring_sync; + ring->semaphore_register[0] = MI_SEMAPHORE_SYNC_BR; + ring->semaphore_register[1] = MI_SEMAPHORE_SYNC_BV; + ring->semaphore_register[2] = MI_SEMAPHORE_SYNC_INVALID; + ring->signal_mbox[0] = GEN6_RBSYNC; + ring->signal_mbox[1] = GEN6_VBSYNC; + ring->init = init_ring_common; + + return intel_init_ring_buffer(dev, ring); +} + +int +intel_ring_flush_all_caches(struct intel_ring_buffer *ring) +{ + int ret; + + if (!ring->gpu_caches_dirty) + return 0; + + ret = ring->flush(ring, 0, I915_GEM_GPU_DOMAINS); + if (ret) + return ret; + + trace_i915_gem_ring_flush(ring, 0, I915_GEM_GPU_DOMAINS); + + ring->gpu_caches_dirty = false; + return 0; +} + +int +intel_ring_invalidate_all_caches(struct intel_ring_buffer *ring) +{ + uint32_t flush_domains; + int ret; + + flush_domains = 0; + if (ring->gpu_caches_dirty) + flush_domains = I915_GEM_GPU_DOMAINS; + + ret = ring->flush(ring, I915_GEM_GPU_DOMAINS, flush_domains); + if (ret) + return ret; + + trace_i915_gem_ring_flush(ring, I915_GEM_GPU_DOMAINS, flush_domains); + + ring->gpu_caches_dirty = false; + return 0; +} |