blob: 40c6aff57256140a3dccd780356cfcd859f377ba [file] [log] [blame]
/*
* Copyright © 2008-2010 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Eric Anholt <eric@anholt.net>
* Zou Nan hai <nanhai.zou@intel.com>
* Xiang Hai hao<haihao.xiang@intel.com>
*
*/
#include <linux/log2.h>
#include <drm/drmP.h>
#include "i915_drv.h"
#include <drm/i915_drm.h>
#include "i915_trace.h"
#include "intel_drv.h"
int __intel_ring_space(int head, int tail, int size)
{
int space = head - tail;
if (space <= 0)
space += size;
return space - I915_RING_FREE_SPACE;
}
void intel_ring_update_space(struct intel_ringbuffer *ringbuf)
{
if (ringbuf->last_retired_head != -1) {
ringbuf->head = ringbuf->last_retired_head;
ringbuf->last_retired_head = -1;
}
ringbuf->space = __intel_ring_space(ringbuf->head & HEAD_ADDR,
ringbuf->tail, ringbuf->size);
}
int intel_ring_space(struct intel_ringbuffer *ringbuf)
{
intel_ring_update_space(ringbuf);
return ringbuf->space;
}
bool intel_ring_stopped(struct intel_engine_cs *ring)
{
struct drm_i915_private *dev_priv = ring->dev->dev_private;
return dev_priv->gpu_error.stop_rings & intel_ring_flag(ring);
}
static void __intel_ring_advance(struct intel_engine_cs *ring)
{
struct intel_ringbuffer *ringbuf = ring->buffer;
ringbuf->tail &= ringbuf->size - 1;
if (intel_ring_stopped(ring))
return;
ring->write_tail(ring, ringbuf->tail);
}
static int
gen2_render_ring_flush(struct drm_i915_gem_request *req,
u32 invalidate_domains,
u32 flush_domains)
{
struct intel_engine_cs *ring = req->ring;
u32 cmd;
int ret;
cmd = MI_FLUSH;
if (((invalidate_domains|flush_domains) & I915_GEM_DOMAIN_RENDER) == 0)
cmd |= MI_NO_WRITE_FLUSH;
if (invalidate_domains & I915_GEM_DOMAIN_SAMPLER)
cmd |= MI_READ_FLUSH;
ret = intel_ring_begin(req, 2);
if (ret)
return ret;
intel_ring_emit(ring, cmd);
intel_ring_emit(ring, MI_NOOP);
intel_ring_advance(ring);
return 0;
}
static int
gen4_render_ring_flush(struct drm_i915_gem_request *req,
u32 invalidate_domains,
u32 flush_domains)
{
struct intel_engine_cs *ring = req->ring;
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(req, 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 drm_i915_gem_request *req)
{
struct intel_engine_cs *ring = req->ring;
u32 scratch_addr = ring->scratch.gtt_offset + 2 * CACHELINE_BYTES;
int ret;
ret = intel_ring_begin(req, 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(req, 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 drm_i915_gem_request *req,
u32 invalidate_domains, u32 flush_domains)
{
struct intel_engine_cs *ring = req->ring;
u32 flags = 0;
u32 scratch_addr = ring->scratch.gtt_offset + 2 * CACHELINE_BYTES;
int ret;
/* Force SNB workarounds for PIPE_CONTROL flushes */
ret = intel_emit_post_sync_nonzero_flush(req);
if (ret)
return ret;
/* Just flush everything. Experiments have shown that reducing the
* number of bits based on the write domains has little performance
* impact.
*/
if (flush_domains) {
flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH;
flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH;
/*
* Ensure that any following seqno writes only happen
* when the render cache is indeed flushed.
*/
flags |= PIPE_CONTROL_CS_STALL;
}
if (invalidate_domains) {
flags |= PIPE_CONTROL_TLB_INVALIDATE;
flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE;
flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE;
flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE;
flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE;
flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE;
/*
* TLB invalidate requires a post-sync write.
*/
flags |= PIPE_CONTROL_QW_WRITE | PIPE_CONTROL_CS_STALL;
}
ret = intel_ring_begin(req, 4);
if (ret)
return ret;
intel_ring_emit(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 drm_i915_gem_request *req)
{
struct intel_engine_cs *ring = req->ring;
int ret;
ret = intel_ring_begin(req, 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 drm_i915_gem_request *req,
u32 invalidate_domains, u32 flush_domains)
{
struct intel_engine_cs *ring = req->ring;
u32 flags = 0;
u32 scratch_addr = ring->scratch.gtt_offset + 2 * CACHELINE_BYTES;
int ret;
/*
* Ensure that any following seqno writes only happen when the render
* cache is indeed flushed.
*
* Workaround: 4th PIPE_CONTROL command (except the ones with only
* read-cache invalidate bits set) must have the CS_STALL bit set. We
* don't try to be clever and just set it unconditionally.
*/
flags |= PIPE_CONTROL_CS_STALL;
/* Just flush everything. Experiments have shown that reducing the
* number of bits based on the write domains has little performance
* impact.
*/
if (flush_domains) {
flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH;
flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH;
flags |= PIPE_CONTROL_DC_FLUSH_ENABLE;
flags |= PIPE_CONTROL_FLUSH_ENABLE;
}
if (invalidate_domains) {
flags |= PIPE_CONTROL_TLB_INVALIDATE;
flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE;
flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE;
flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE;
flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE;
flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE;
flags |= PIPE_CONTROL_MEDIA_STATE_CLEAR;
/*
* TLB invalidate requires a post-sync write.
*/
flags |= PIPE_CONTROL_QW_WRITE;
flags |= PIPE_CONTROL_GLOBAL_GTT_IVB;
flags |= PIPE_CONTROL_STALL_AT_SCOREBOARD;
/* Workaround: we must issue a pipe_control with CS-stall bit
* set before a pipe_control command that has the state cache
* invalidate bit set. */
gen7_render_ring_cs_stall_wa(req);
}
ret = intel_ring_begin(req, 4);
if (ret)
return ret;
intel_ring_emit(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 int
gen8_emit_pipe_control(struct drm_i915_gem_request *req,
u32 flags, u32 scratch_addr)
{
struct intel_engine_cs *ring = req->ring;
int ret;
ret = intel_ring_begin(req, 6);
if (ret)
return ret;
intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(6));
intel_ring_emit(ring, flags);
intel_ring_emit(ring, scratch_addr);
intel_ring_emit(ring, 0);
intel_ring_emit(ring, 0);
intel_ring_emit(ring, 0);
intel_ring_advance(ring);
return 0;
}
static int
gen8_render_ring_flush(struct drm_i915_gem_request *req,
u32 invalidate_domains, u32 flush_domains)
{
u32 flags = 0;
u32 scratch_addr = req->ring->scratch.gtt_offset + 2 * CACHELINE_BYTES;
int ret;
flags |= PIPE_CONTROL_CS_STALL;
if (flush_domains) {
flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH;
flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH;
flags |= PIPE_CONTROL_DC_FLUSH_ENABLE;
flags |= PIPE_CONTROL_FLUSH_ENABLE;
}
if (invalidate_domains) {
flags |= PIPE_CONTROL_TLB_INVALIDATE;
flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE;
flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE;
flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE;
flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE;
flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE;
flags |= PIPE_CONTROL_QW_WRITE;
flags |= PIPE_CONTROL_GLOBAL_GTT_IVB;
/* WaCsStallBeforeStateCacheInvalidate:bdw,chv */
ret = gen8_emit_pipe_control(req,
PIPE_CONTROL_CS_STALL |
PIPE_CONTROL_STALL_AT_SCOREBOARD,
0);
if (ret)
return ret;
}
return gen8_emit_pipe_control(req, flags, scratch_addr);
}
static void ring_write_tail(struct intel_engine_cs *ring,
u32 value)
{
struct drm_i915_private *dev_priv = ring->dev->dev_private;
I915_WRITE_TAIL(ring, value);
}
u64 intel_ring_get_active_head(struct intel_engine_cs *ring)
{
struct drm_i915_private *dev_priv = ring->dev->dev_private;
u64 acthd;
if (INTEL_INFO(ring->dev)->gen >= 8)
acthd = I915_READ64_2x32(RING_ACTHD(ring->mmio_base),
RING_ACTHD_UDW(ring->mmio_base));
else if (INTEL_INFO(ring->dev)->gen >= 4)
acthd = I915_READ(RING_ACTHD(ring->mmio_base));
else
acthd = I915_READ(ACTHD);
return acthd;
}
static void ring_setup_phys_status_page(struct intel_engine_cs *ring)
{
struct drm_i915_private *dev_priv = ring->dev->dev_private;
u32 addr;
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);
}
static void intel_ring_setup_status_page(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = ring->dev->dev_private;
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)) {
switch (ring->id) {
case RCS:
mmio = RENDER_HWS_PGA_GEN7;
break;
case BCS:
mmio = BLT_HWS_PGA_GEN7;
break;
/*
* VCS2 actually doesn't exist on Gen7. Only shut up
* gcc switch check warning
*/
case VCS2:
case VCS:
mmio = BSD_HWS_PGA_GEN7;
break;
case VECS:
mmio = VEBOX_HWS_PGA_GEN7;
break;
}
} else if (IS_GEN6(ring->dev)) {
mmio = RING_HWS_PGA_GEN6(ring->mmio_base);
} else {
/* XXX: gen8 returns to sanity */
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
*
* FIXME: These two bits have disappeared on gen8, so a question
* arises: do we still need this and if so how should we go about
* invalidating the TLB?
*/
if (INTEL_INFO(dev)->gen >= 6 && INTEL_INFO(dev)->gen < 8) {
i915_reg_t reg = RING_INSTPM(ring->mmio_base);
/* ring should be idle before issuing a sync flush*/
WARN_ON((I915_READ_MODE(ring) & MODE_IDLE) == 0);
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 bool stop_ring(struct intel_engine_cs *ring)
{
struct drm_i915_private *dev_priv = to_i915(ring->dev);
if (!IS_GEN2(ring->dev)) {
I915_WRITE_MODE(ring, _MASKED_BIT_ENABLE(STOP_RING));
if (wait_for((I915_READ_MODE(ring) & MODE_IDLE) != 0, 1000)) {
DRM_ERROR("%s : timed out trying to stop ring\n", ring->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(ring) != I915_READ_TAIL(ring))
return false;
}
}
I915_WRITE_CTL(ring, 0);
I915_WRITE_HEAD(ring, 0);
ring->write_tail(ring, 0);
if (!IS_GEN2(ring->dev)) {
(void)I915_READ_CTL(ring);
I915_WRITE_MODE(ring, _MASKED_BIT_DISABLE(STOP_RING));
}
return (I915_READ_HEAD(ring) & HEAD_ADDR) == 0;
}
static int init_ring_common(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_ringbuffer *ringbuf = ring->buffer;
struct drm_i915_gem_object *obj = ringbuf->obj;
int ret = 0;
intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
if (!stop_ring(ring)) {
/* G45 ring initialization often fails to reset head to zero */
DRM_DEBUG_KMS("%s head not reset to zero "
"ctl %08x head %08x tail %08x start %08x\n",
ring->name,
I915_READ_CTL(ring),
I915_READ_HEAD(ring),
I915_READ_TAIL(ring),
I915_READ_START(ring));
if (!stop_ring(ring)) {
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));
ret = -EIO;
goto out;
}
}
if (I915_NEED_GFX_HWS(dev))
intel_ring_setup_status_page(ring);
else
ring_setup_phys_status_page(ring);
/* Enforce ordering by reading HEAD register back */
I915_READ_HEAD(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, i915_gem_obj_ggtt_offset(obj));
/* WaClearRingBufHeadRegAtInit:ctg,elk */
if (I915_READ_HEAD(ring))
DRM_DEBUG("%s initialization failed [head=%08x], fudging\n",
ring->name, I915_READ_HEAD(ring));
I915_WRITE_HEAD(ring, 0);
(void)I915_READ_HEAD(ring);
I915_WRITE_CTL(ring,
((ringbuf->size - PAGE_SIZE) & RING_NR_PAGES)
| RING_VALID);
/* If the head is still not zero, the ring is dead */
if (wait_for((I915_READ_CTL(ring) & RING_VALID) != 0 &&
I915_READ_START(ring) == i915_gem_obj_ggtt_offset(obj) &&
(I915_READ_HEAD(ring) & HEAD_ADDR) == 0, 50)) {
DRM_ERROR("%s initialization failed "
"ctl %08x (valid? %d) head %08x tail %08x start %08x [expected %08lx]\n",
ring->name,
I915_READ_CTL(ring), I915_READ_CTL(ring) & RING_VALID,
I915_READ_HEAD(ring), I915_READ_TAIL(ring),
I915_READ_START(ring), (unsigned long)i915_gem_obj_ggtt_offset(obj));
ret = -EIO;
goto out;
}
ringbuf->last_retired_head = -1;
ringbuf->head = I915_READ_HEAD(ring);
ringbuf->tail = I915_READ_TAIL(ring) & TAIL_ADDR;
intel_ring_update_space(ringbuf);
memset(&ring->hangcheck, 0, sizeof(ring->hangcheck));
out:
intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
return ret;
}
void
intel_fini_pipe_control(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
if (ring->scratch.obj == NULL)
return;
if (INTEL_INFO(dev)->gen >= 5) {
kunmap(sg_page(ring->scratch.obj->pages->sgl));
i915_gem_object_ggtt_unpin(ring->scratch.obj);
}
drm_gem_object_unreference(&ring->scratch.obj->base);
ring->scratch.obj = NULL;
}
int
intel_init_pipe_control(struct intel_engine_cs *ring)
{
int ret;
WARN_ON(ring->scratch.obj);
ring->scratch.obj = i915_gem_alloc_object(ring->dev, 4096);
if (ring->scratch.obj == NULL) {
DRM_ERROR("Failed to allocate seqno page\n");
ret = -ENOMEM;
goto err;
}
ret = i915_gem_object_set_cache_level(ring->scratch.obj, I915_CACHE_LLC);
if (ret)
goto err_unref;
ret = i915_gem_obj_ggtt_pin(ring->scratch.obj, 4096, 0);
if (ret)
goto err_unref;
ring->scratch.gtt_offset = i915_gem_obj_ggtt_offset(ring->scratch.obj);
ring->scratch.cpu_page = kmap(sg_page(ring->scratch.obj->pages->sgl));
if (ring->scratch.cpu_page == NULL) {
ret = -ENOMEM;
goto err_unpin;
}
DRM_DEBUG_DRIVER("%s pipe control offset: 0x%08x\n",
ring->name, ring->scratch.gtt_offset);
return 0;
err_unpin:
i915_gem_object_ggtt_unpin(ring->scratch.obj);
err_unref:
drm_gem_object_unreference(&ring->scratch.obj->base);
err:
return ret;
}
static int intel_ring_workarounds_emit(struct drm_i915_gem_request *req)
{
int ret, i;
struct intel_engine_cs *ring = req->ring;
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct i915_workarounds *w = &dev_priv->workarounds;
if (w->count == 0)
return 0;
ring->gpu_caches_dirty = true;
ret = intel_ring_flush_all_caches(req);
if (ret)
return ret;
ret = intel_ring_begin(req, (w->count * 2 + 2));
if (ret)
return ret;
intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(w->count));
for (i = 0; i < w->count; i++) {
intel_ring_emit_reg(ring, w->reg[i].addr);
intel_ring_emit(ring, w->reg[i].value);
}
intel_ring_emit(ring, MI_NOOP);
intel_ring_advance(ring);
ring->gpu_caches_dirty = true;
ret = intel_ring_flush_all_caches(req);
if (ret)
return ret;
DRM_DEBUG_DRIVER("Number of Workarounds emitted: %d\n", w->count);
return 0;
}
static int intel_rcs_ctx_init(struct drm_i915_gem_request *req)
{
int ret;
ret = intel_ring_workarounds_emit(req);
if (ret != 0)
return ret;
ret = i915_gem_render_state_init(req);
if (ret)
DRM_ERROR("init render state: %d\n", ret);
return ret;
}
static int wa_add(struct drm_i915_private *dev_priv,
i915_reg_t addr,
const u32 mask, const u32 val)
{
const u32 idx = dev_priv->workarounds.count;
if (WARN_ON(idx >= I915_MAX_WA_REGS))
return -ENOSPC;
dev_priv->workarounds.reg[idx].addr = addr;
dev_priv->workarounds.reg[idx].value = val;
dev_priv->workarounds.reg[idx].mask = mask;
dev_priv->workarounds.count++;
return 0;
}
#define WA_REG(addr, mask, val) do { \
const int r = wa_add(dev_priv, (addr), (mask), (val)); \
if (r) \
return r; \
} while (0)
#define WA_SET_BIT_MASKED(addr, mask) \
WA_REG(addr, (mask), _MASKED_BIT_ENABLE(mask))
#define WA_CLR_BIT_MASKED(addr, mask) \
WA_REG(addr, (mask), _MASKED_BIT_DISABLE(mask))
#define WA_SET_FIELD_MASKED(addr, mask, value) \
WA_REG(addr, mask, _MASKED_FIELD(mask, value))
#define WA_SET_BIT(addr, mask) WA_REG(addr, mask, I915_READ(addr) | (mask))
#define WA_CLR_BIT(addr, mask) WA_REG(addr, mask, I915_READ(addr) & ~(mask))
#define WA_WRITE(addr, val) WA_REG(addr, 0xffffffff, val)
static int gen8_init_workarounds(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
WA_SET_BIT_MASKED(INSTPM, INSTPM_FORCE_ORDERING);
/* WaDisableAsyncFlipPerfMode:bdw,chv */
WA_SET_BIT_MASKED(MI_MODE, ASYNC_FLIP_PERF_DISABLE);
/* WaDisablePartialInstShootdown:bdw,chv */
WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN,
PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE);
/* Use Force Non-Coherent whenever executing a 3D context. This is a
* workaround for for a possible hang in the unlikely event a TLB
* invalidation occurs during a PSD flush.
*/
/* WaForceEnableNonCoherent:bdw,chv */
/* WaHdcDisableFetchWhenMasked:bdw,chv */
WA_SET_BIT_MASKED(HDC_CHICKEN0,
HDC_DONOT_FETCH_MEM_WHEN_MASKED |
HDC_FORCE_NON_COHERENT);
/* From the Haswell PRM, Command Reference: Registers, CACHE_MODE_0:
* "The Hierarchical Z RAW Stall Optimization allows non-overlapping
* polygons in the same 8x4 pixel/sample area to be processed without
* stalling waiting for the earlier ones to write to Hierarchical Z
* buffer."
*
* This optimization is off by default for BDW and CHV; turn it on.
*/
WA_CLR_BIT_MASKED(CACHE_MODE_0_GEN7, HIZ_RAW_STALL_OPT_DISABLE);
/* Wa4x4STCOptimizationDisable:bdw,chv */
WA_SET_BIT_MASKED(CACHE_MODE_1, GEN8_4x4_STC_OPTIMIZATION_DISABLE);
/*
* BSpec recommends 8x4 when MSAA is used,
* however in practice 16x4 seems fastest.
*
* Note that PS/WM thread counts depend on the WIZ hashing
* disable bit, which we don't touch here, but it's good
* to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
*/
WA_SET_FIELD_MASKED(GEN7_GT_MODE,
GEN6_WIZ_HASHING_MASK,
GEN6_WIZ_HASHING_16x4);
return 0;
}
static int bdw_init_workarounds(struct intel_engine_cs *ring)
{
int ret;
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
ret = gen8_init_workarounds(ring);
if (ret)
return ret;
/* WaDisableThreadStallDopClockGating:bdw (pre-production) */
WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, STALL_DOP_GATING_DISABLE);
/* WaDisableDopClockGating:bdw */
WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2,
DOP_CLOCK_GATING_DISABLE);
WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3,
GEN8_SAMPLER_POWER_BYPASS_DIS);
WA_SET_BIT_MASKED(HDC_CHICKEN0,
/* WaForceContextSaveRestoreNonCoherent:bdw */
HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT |
/* WaDisableFenceDestinationToSLM:bdw (pre-prod) */
(IS_BDW_GT3(dev) ? HDC_FENCE_DEST_SLM_DISABLE : 0));
return 0;
}
static int chv_init_workarounds(struct intel_engine_cs *ring)
{
int ret;
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
ret = gen8_init_workarounds(ring);
if (ret)
return ret;
/* WaDisableThreadStallDopClockGating:chv */
WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, STALL_DOP_GATING_DISABLE);
/* Improve HiZ throughput on CHV. */
WA_SET_BIT_MASKED(HIZ_CHICKEN, CHV_HZ_8X8_MODE_IN_1X);
return 0;
}
static int gen9_init_workarounds(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
uint32_t tmp;
/* WaEnableLbsSlaRetryTimerDecrement:skl */
I915_WRITE(BDW_SCRATCH1, I915_READ(BDW_SCRATCH1) |
GEN9_LBS_SLA_RETRY_TIMER_DECREMENT_ENABLE);
/* WaDisableKillLogic:bxt,skl */
I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) |
ECOCHK_DIS_TLB);
/* WaDisablePartialInstShootdown:skl,bxt */
WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN,
PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE);
/* Syncing dependencies between camera and graphics:skl,bxt */
WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3,
GEN9_DISABLE_OCL_OOB_SUPPRESS_LOGIC);
/* WaDisableDgMirrorFixInHalfSliceChicken5:skl,bxt */
if (IS_SKL_REVID(dev, 0, SKL_REVID_B0) ||
IS_BXT_REVID(dev, 0, BXT_REVID_A1))
WA_CLR_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN5,
GEN9_DG_MIRROR_FIX_ENABLE);
/* WaSetDisablePixMaskCammingAndRhwoInCommonSliceChicken:skl,bxt */
if (IS_SKL_REVID(dev, 0, SKL_REVID_B0) ||
IS_BXT_REVID(dev, 0, BXT_REVID_A1)) {
WA_SET_BIT_MASKED(GEN7_COMMON_SLICE_CHICKEN1,
GEN9_RHWO_OPTIMIZATION_DISABLE);
/*
* WA also requires GEN9_SLICE_COMMON_ECO_CHICKEN0[14:14] to be set
* but we do that in per ctx batchbuffer as there is an issue
* with this register not getting restored on ctx restore
*/
}
/* WaEnableYV12BugFixInHalfSliceChicken7:skl,bxt */
if (IS_SKL_REVID(dev, SKL_REVID_C0, REVID_FOREVER) || IS_BROXTON(dev))
WA_SET_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN7,
GEN9_ENABLE_YV12_BUGFIX);
/* Wa4x4STCOptimizationDisable:skl,bxt */
/* WaDisablePartialResolveInVc:skl,bxt */
WA_SET_BIT_MASKED(CACHE_MODE_1, (GEN8_4x4_STC_OPTIMIZATION_DISABLE |
GEN9_PARTIAL_RESOLVE_IN_VC_DISABLE));
/* WaCcsTlbPrefetchDisable:skl,bxt */
WA_CLR_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN5,
GEN9_CCS_TLB_PREFETCH_ENABLE);
/* WaDisableMaskBasedCammingInRCC:skl,bxt */
if (IS_SKL_REVID(dev, SKL_REVID_C0, SKL_REVID_C0) ||
IS_BXT_REVID(dev, 0, BXT_REVID_A1))
WA_SET_BIT_MASKED(SLICE_ECO_CHICKEN0,
PIXEL_MASK_CAMMING_DISABLE);
/* WaForceContextSaveRestoreNonCoherent:skl,bxt */
tmp = HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT;
if (IS_SKL_REVID(dev, SKL_REVID_F0, SKL_REVID_F0) ||
IS_BXT_REVID(dev, BXT_REVID_B0, REVID_FOREVER))
tmp |= HDC_FORCE_CSR_NON_COHERENT_OVR_DISABLE;
WA_SET_BIT_MASKED(HDC_CHICKEN0, tmp);
/* WaDisableSamplerPowerBypassForSOPingPong:skl,bxt */
if (IS_SKYLAKE(dev) || IS_BXT_REVID(dev, 0, BXT_REVID_B0))
WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3,
GEN8_SAMPLER_POWER_BYPASS_DIS);
/* WaDisableSTUnitPowerOptimization:skl,bxt */
WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN2, GEN8_ST_PO_DISABLE);
return 0;
}
static int skl_tune_iz_hashing(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
u8 vals[3] = { 0, 0, 0 };
unsigned int i;
for (i = 0; i < 3; i++) {
u8 ss;
/*
* Only consider slices where one, and only one, subslice has 7
* EUs
*/
if (!is_power_of_2(dev_priv->info.subslice_7eu[i]))
continue;
/*
* subslice_7eu[i] != 0 (because of the check above) and
* ss_max == 4 (maximum number of subslices possible per slice)
*
* -> 0 <= ss <= 3;
*/
ss = ffs(dev_priv->info.subslice_7eu[i]) - 1;
vals[i] = 3 - ss;
}
if (vals[0] == 0 && vals[1] == 0 && vals[2] == 0)
return 0;
/* Tune IZ hashing. See intel_device_info_runtime_init() */
WA_SET_FIELD_MASKED(GEN7_GT_MODE,
GEN9_IZ_HASHING_MASK(2) |
GEN9_IZ_HASHING_MASK(1) |
GEN9_IZ_HASHING_MASK(0),
GEN9_IZ_HASHING(2, vals[2]) |
GEN9_IZ_HASHING(1, vals[1]) |
GEN9_IZ_HASHING(0, vals[0]));
return 0;
}
static int skl_init_workarounds(struct intel_engine_cs *ring)
{
int ret;
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
ret = gen9_init_workarounds(ring);
if (ret)
return ret;
if (IS_SKL_REVID(dev, 0, SKL_REVID_D0)) {
/* WaDisableChickenBitTSGBarrierAckForFFSliceCS:skl */
I915_WRITE(FF_SLICE_CS_CHICKEN2,
_MASKED_BIT_ENABLE(GEN9_TSG_BARRIER_ACK_DISABLE));
}
/* GEN8_L3SQCREG4 has a dependency with WA batch so any new changes
* involving this register should also be added to WA batch as required.
*/
if (IS_SKL_REVID(dev, 0, SKL_REVID_E0))
/* WaDisableLSQCROPERFforOCL:skl */
I915_WRITE(GEN8_L3SQCREG4, I915_READ(GEN8_L3SQCREG4) |
GEN8_LQSC_RO_PERF_DIS);
/* WaEnableGapsTsvCreditFix:skl */
if (IS_SKL_REVID(dev, SKL_REVID_C0, REVID_FOREVER)) {
I915_WRITE(GEN8_GARBCNTL, (I915_READ(GEN8_GARBCNTL) |
GEN9_GAPS_TSV_CREDIT_DISABLE));
}
/* WaDisablePowerCompilerClockGating:skl */
if (IS_SKL_REVID(dev, SKL_REVID_B0, SKL_REVID_B0))
WA_SET_BIT_MASKED(HIZ_CHICKEN,
BDW_HIZ_POWER_COMPILER_CLOCK_GATING_DISABLE);
if (IS_SKL_REVID(dev, 0, SKL_REVID_F0)) {
/*
*Use Force Non-Coherent whenever executing a 3D context. This
* is a workaround for a possible hang in the unlikely event
* a TLB invalidation occurs during a PSD flush.
*/
/* WaForceEnableNonCoherent:skl */
WA_SET_BIT_MASKED(HDC_CHICKEN0,
HDC_FORCE_NON_COHERENT);
/* WaDisableHDCInvalidation:skl */
I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) |
BDW_DISABLE_HDC_INVALIDATION);
}
/* WaBarrierPerformanceFixDisable:skl */
if (IS_SKL_REVID(dev, SKL_REVID_C0, SKL_REVID_D0))
WA_SET_BIT_MASKED(HDC_CHICKEN0,
HDC_FENCE_DEST_SLM_DISABLE |
HDC_BARRIER_PERFORMANCE_DISABLE);
/* WaDisableSbeCacheDispatchPortSharing:skl */
if (IS_SKL_REVID(dev, 0, SKL_REVID_F0))
WA_SET_BIT_MASKED(
GEN7_HALF_SLICE_CHICKEN1,
GEN7_SBE_SS_CACHE_DISPATCH_PORT_SHARING_DISABLE);
return skl_tune_iz_hashing(ring);
}
static int bxt_init_workarounds(struct intel_engine_cs *ring)
{
int ret;
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
ret = gen9_init_workarounds(ring);
if (ret)
return ret;
/* WaStoreMultiplePTEenable:bxt */
/* This is a requirement according to Hardware specification */
if (IS_BXT_REVID(dev, 0, BXT_REVID_A1))
I915_WRITE(TILECTL, I915_READ(TILECTL) | TILECTL_TLBPF);
/* WaSetClckGatingDisableMedia:bxt */
if (IS_BXT_REVID(dev, 0, BXT_REVID_A1)) {
I915_WRITE(GEN7_MISCCPCTL, (I915_READ(GEN7_MISCCPCTL) &
~GEN8_DOP_CLOCK_GATE_MEDIA_ENABLE));
}
/* WaDisableThreadStallDopClockGating:bxt */
WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN,
STALL_DOP_GATING_DISABLE);
/* WaDisableSbeCacheDispatchPortSharing:bxt */
if (IS_BXT_REVID(dev, 0, BXT_REVID_B0)) {
WA_SET_BIT_MASKED(
GEN7_HALF_SLICE_CHICKEN1,
GEN7_SBE_SS_CACHE_DISPATCH_PORT_SHARING_DISABLE);
}
return 0;
}
int init_workarounds_ring(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
WARN_ON(ring->id != RCS);
dev_priv->workarounds.count = 0;
if (IS_BROADWELL(dev))
return bdw_init_workarounds(ring);
if (IS_CHERRYVIEW(dev))
return chv_init_workarounds(ring);
if (IS_SKYLAKE(dev))
return skl_init_workarounds(ring);
if (IS_BROXTON(dev))
return bxt_init_workarounds(ring);
return 0;
}
static int init_render_ring(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
int ret = init_ring_common(ring);
if (ret)
return ret;
/* WaTimedSingleVertexDispatch:cl,bw,ctg,elk,ilk,snb */
if (INTEL_INFO(dev)->gen >= 4 && INTEL_INFO(dev)->gen < 7)
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 (INTEL_INFO(dev)->gen >= 6 && INTEL_INFO(dev)->gen < 8)
I915_WRITE(MI_MODE, _MASKED_BIT_ENABLE(ASYNC_FLIP_PERF_DISABLE));
/* Required for the hardware to program scanline values for waiting */
/* WaEnableFlushTlbInvalidationMode:snb */
if (INTEL_INFO(dev)->gen == 6)
I915_WRITE(GFX_MODE,
_MASKED_BIT_ENABLE(GFX_TLB_INVALIDATE_EXPLICIT));
/* WaBCSVCSTlbInvalidationMode:ivb,vlv,hsw */
if (IS_GEN7(dev))
I915_WRITE(GFX_MODE_GEN7,
_MASKED_BIT_ENABLE(GFX_TLB_INVALIDATE_EXPLICIT) |
_MASKED_BIT_ENABLE(GFX_REPLAY_MODE));
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));
}
if (INTEL_INFO(dev)->gen >= 6 && INTEL_INFO(dev)->gen < 8)
I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_FORCE_ORDERING));
if (HAS_L3_DPF(dev))
I915_WRITE_IMR(ring, ~GT_PARITY_ERROR(dev));
return init_workarounds_ring(ring);
}
static void render_ring_cleanup(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
if (dev_priv->semaphore_obj) {
i915_gem_object_ggtt_unpin(dev_priv->semaphore_obj);
drm_gem_object_unreference(&dev_priv->semaphore_obj->base);
dev_priv->semaphore_obj = NULL;
}
intel_fini_pipe_control(ring);
}
static int gen8_rcs_signal(struct drm_i915_gem_request *signaller_req,
unsigned int num_dwords)
{
#define MBOX_UPDATE_DWORDS 8
struct intel_engine_cs *signaller = signaller_req->ring;
struct drm_device *dev = signaller->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_engine_cs *waiter;
int i, ret, num_rings;
num_rings = hweight32(INTEL_INFO(dev)->ring_mask);
num_dwords += (num_rings-1) * MBOX_UPDATE_DWORDS;
#undef MBOX_UPDATE_DWORDS
ret = intel_ring_begin(signaller_req, num_dwords);
if (ret)
return ret;
for_each_ring(waiter, dev_priv, i) {
u32 seqno;
u64 gtt_offset = signaller->semaphore.signal_ggtt[i];
if (gtt_offset == MI_SEMAPHORE_SYNC_INVALID)
continue;
seqno = i915_gem_request_get_seqno(signaller_req);
intel_ring_emit(signaller, GFX_OP_PIPE_CONTROL(6));
intel_ring_emit(signaller, PIPE_CONTROL_GLOBAL_GTT_IVB |
PIPE_CONTROL_QW_WRITE |
PIPE_CONTROL_FLUSH_ENABLE);
intel_ring_emit(signaller, lower_32_bits(gtt_offset));
intel_ring_emit(signaller, upper_32_bits(gtt_offset));
intel_ring_emit(signaller, seqno);
intel_ring_emit(signaller, 0);
intel_ring_emit(signaller, MI_SEMAPHORE_SIGNAL |
MI_SEMAPHORE_TARGET(waiter->id));
intel_ring_emit(signaller, 0);
}
return 0;
}
static int gen8_xcs_signal(struct drm_i915_gem_request *signaller_req,
unsigned int num_dwords)
{
#define MBOX_UPDATE_DWORDS 6
struct intel_engine_cs *signaller = signaller_req->ring;
struct drm_device *dev = signaller->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_engine_cs *waiter;
int i, ret, num_rings;
num_rings = hweight32(INTEL_INFO(dev)->ring_mask);
num_dwords += (num_rings-1) * MBOX_UPDATE_DWORDS;
#undef MBOX_UPDATE_DWORDS
ret = intel_ring_begin(signaller_req, num_dwords);
if (ret)
return ret;
for_each_ring(waiter, dev_priv, i) {
u32 seqno;
u64 gtt_offset = signaller->semaphore.signal_ggtt[i];
if (gtt_offset == MI_SEMAPHORE_SYNC_INVALID)
continue;
seqno = i915_gem_request_get_seqno(signaller_req);
intel_ring_emit(signaller, (MI_FLUSH_DW + 1) |
MI_FLUSH_DW_OP_STOREDW);
intel_ring_emit(signaller, lower_32_bits(gtt_offset) |
MI_FLUSH_DW_USE_GTT);
intel_ring_emit(signaller, upper_32_bits(gtt_offset));
intel_ring_emit(signaller, seqno);
intel_ring_emit(signaller, MI_SEMAPHORE_SIGNAL |
MI_SEMAPHORE_TARGET(waiter->id));
intel_ring_emit(signaller, 0);
}
return 0;
}
static int gen6_signal(struct drm_i915_gem_request *signaller_req,
unsigned int num_dwords)
{
struct intel_engine_cs *signaller = signaller_req->ring;
struct drm_device *dev = signaller->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_engine_cs *useless;
int i, ret, num_rings;
#define MBOX_UPDATE_DWORDS 3
num_rings = hweight32(INTEL_INFO(dev)->ring_mask);
num_dwords += round_up((num_rings-1) * MBOX_UPDATE_DWORDS, 2);
#undef MBOX_UPDATE_DWORDS
ret = intel_ring_begin(signaller_req, num_dwords);
if (ret)
return ret;
for_each_ring(useless, dev_priv, i) {
i915_reg_t mbox_reg = signaller->semaphore.mbox.signal[i];
if (i915_mmio_reg_valid(mbox_reg)) {
u32 seqno = i915_gem_request_get_seqno(signaller_req);
intel_ring_emit(signaller, MI_LOAD_REGISTER_IMM(1));
intel_ring_emit_reg(signaller, mbox_reg);
intel_ring_emit(signaller, seqno);
}
}
/* If num_dwords was rounded, make sure the tail pointer is correct */
if (num_rings % 2 == 0)
intel_ring_emit(signaller, MI_NOOP);
return 0;
}
/**
* gen6_add_request - Update the semaphore mailbox registers
*
* @request - request to write to the ring
*
* Update the mailbox registers in the *other* rings with the current seqno.
* This acts like a signal in the canonical semaphore.
*/
static int
gen6_add_request(struct drm_i915_gem_request *req)
{
struct intel_engine_cs *ring = req->ring;
int ret;
if (ring->semaphore.signal)
ret = ring->semaphore.signal(req, 4);
else
ret = intel_ring_begin(req, 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, i915_gem_request_get_seqno(req));
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
gen8_ring_sync(struct drm_i915_gem_request *waiter_req,
struct intel_engine_cs *signaller,
u32 seqno)
{
struct intel_engine_cs *waiter = waiter_req->ring;
struct drm_i915_private *dev_priv = waiter->dev->dev_private;
int ret;
ret = intel_ring_begin(waiter_req, 4);
if (ret)
return ret;
intel_ring_emit(waiter, MI_SEMAPHORE_WAIT |
MI_SEMAPHORE_GLOBAL_GTT |
MI_SEMAPHORE_POLL |
MI_SEMAPHORE_SAD_GTE_SDD);
intel_ring_emit(waiter, seqno);
intel_ring_emit(waiter,
lower_32_bits(GEN8_WAIT_OFFSET(waiter, signaller->id)));
intel_ring_emit(waiter,
upper_32_bits(GEN8_WAIT_OFFSET(waiter, signaller->id)));
intel_ring_advance(waiter);
return 0;
}
static int
gen6_ring_sync(struct drm_i915_gem_request *waiter_req,
struct intel_engine_cs *signaller,
u32 seqno)
{
struct intel_engine_cs *waiter = waiter_req->ring;
u32 dw1 = MI_SEMAPHORE_MBOX |
MI_SEMAPHORE_COMPARE |
MI_SEMAPHORE_REGISTER;
u32 wait_mbox = signaller->semaphore.mbox.wait[waiter->id];
int ret;
/* Throughout all of the GEM code, seqno passed implies our current
* seqno is >= the last seqno executed. However for hardware the
* comparison is strictly greater than.
*/
seqno -= 1;
WARN_ON(wait_mbox == MI_SEMAPHORE_SYNC_INVALID);
ret = intel_ring_begin(waiter_req, 4);
if (ret)
return ret;
/* If seqno wrap happened, omit the wait with no-ops */
if (likely(!i915_gem_has_seqno_wrapped(waiter->dev, seqno))) {
intel_ring_emit(waiter, dw1 | wait_mbox);
intel_ring_emit(waiter, seqno);
intel_ring_emit(waiter, 0);
intel_ring_emit(waiter, MI_NOOP);
} else {
intel_ring_emit(waiter, MI_NOOP);
intel_ring_emit(waiter, MI_NOOP);
intel_ring_emit(waiter, MI_NOOP);
intel_ring_emit(waiter, MI_NOOP);
}
intel_ring_advance(waiter);
return 0;
}
#define PIPE_CONTROL_FLUSH(ring__, addr__) \
do { \
intel_ring_emit(ring__, GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE | \
PIPE_CONTROL_DEPTH_STALL); \
intel_ring_emit(ring__, (addr__) | PIPE_CONTROL_GLOBAL_GTT); \
intel_ring_emit(ring__, 0); \
intel_ring_emit(ring__, 0); \
} while (0)
static int
pc_render_add_request(struct drm_i915_gem_request *req)
{
struct intel_engine_cs *ring = req->ring;
u32 scratch_addr = ring->scratch.gtt_offset + 2 * CACHELINE_BYTES;
int ret;
/* For Ironlake, MI_USER_INTERRUPT was deprecated and apparently
* incoherent with writes to memory, i.e. completely fubar,
* so we need to use PIPE_NOTIFY instead.
*
* However, we also need to workaround the qword write
* incoherence by flushing the 6 PIPE_NOTIFY buffers out to
* memory before requesting an interrupt.
*/
ret = intel_ring_begin(req, 32);
if (ret)
return ret;
intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE |
PIPE_CONTROL_WRITE_FLUSH |
PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE);
intel_ring_emit(ring, ring->scratch.gtt_offset | PIPE_CONTROL_GLOBAL_GTT);
intel_ring_emit(ring, i915_gem_request_get_seqno(req));
intel_ring_emit(ring, 0);
PIPE_CONTROL_FLUSH(ring, scratch_addr);
scratch_addr += 2 * CACHELINE_BYTES; /* write to separate cachelines */
PIPE_CONTROL_FLUSH(ring, scratch_addr);
scratch_addr += 2 * CACHELINE_BYTES;
PIPE_CONTROL_FLUSH(ring, scratch_addr);
scratch_addr += 2 * CACHELINE_BYTES;
PIPE_CONTROL_FLUSH(ring, scratch_addr);
scratch_addr += 2 * CACHELINE_BYTES;
PIPE_CONTROL_FLUSH(ring, scratch_addr);
scratch_addr += 2 * CACHELINE_BYTES;
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, ring->scratch.gtt_offset | PIPE_CONTROL_GLOBAL_GTT);
intel_ring_emit(ring, i915_gem_request_get_seqno(req));
intel_ring_emit(ring, 0);
__intel_ring_advance(ring);
return 0;
}
static u32
gen6_ring_get_seqno(struct intel_engine_cs *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) {
struct drm_i915_private *dev_priv = ring->dev->dev_private;
POSTING_READ(RING_ACTHD(ring->mmio_base));
}
return intel_read_status_page(ring, I915_GEM_HWS_INDEX);
}
static u32
ring_get_seqno(struct intel_engine_cs *ring, bool lazy_coherency)
{
return intel_read_status_page(ring, I915_GEM_HWS_INDEX);
}
static void
ring_set_seqno(struct intel_engine_cs *ring, u32 seqno)
{
intel_write_status_page(ring, I915_GEM_HWS_INDEX, seqno);
}
static u32
pc_render_get_seqno(struct intel_engine_cs *ring, bool lazy_coherency)
{
return ring->scratch.cpu_page[0];
}
static void
pc_render_set_seqno(struct intel_engine_cs *ring, u32 seqno)
{
ring->scratch.cpu_page[0] = seqno;
}
static bool
gen5_ring_get_irq(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
unsigned long flags;
if (WARN_ON(!intel_irqs_enabled(dev_priv)))
return false;
spin_lock_irqsave(&dev_priv->irq_lock, flags);
if (ring->irq_refcount++ == 0)
gen5_enable_gt_irq(dev_priv, ring->irq_enable_mask);
spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
return true;
}
static void
gen5_ring_put_irq(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
unsigned long flags;
spin_lock_irqsave(&dev_priv->irq_lock, flags);
if (--ring->irq_refcount == 0)
gen5_disable_gt_irq(dev_priv, ring->irq_enable_mask);
spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
}
static bool
i9xx_ring_get_irq(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
unsigned long flags;
if (!intel_irqs_enabled(dev_priv))
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_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *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_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
unsigned long flags;
if (!intel_irqs_enabled(dev_priv))
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_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *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);
}
static int
bsd_ring_flush(struct drm_i915_gem_request *req,
u32 invalidate_domains,
u32 flush_domains)
{
struct intel_engine_cs *ring = req->ring;
int ret;
ret = intel_ring_begin(req, 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 drm_i915_gem_request *req)
{
struct intel_engine_cs *ring = req->ring;
int ret;
ret = intel_ring_begin(req, 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, i915_gem_request_get_seqno(req));
intel_ring_emit(ring, MI_USER_INTERRUPT);
__intel_ring_advance(ring);
return 0;
}
static bool
gen6_ring_get_irq(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
unsigned long flags;
if (WARN_ON(!intel_irqs_enabled(dev_priv)))
return false;
spin_lock_irqsave(&dev_priv->irq_lock, flags);
if (ring->irq_refcount++ == 0) {
if (HAS_L3_DPF(dev) && ring->id == RCS)
I915_WRITE_IMR(ring,
~(ring->irq_enable_mask |
GT_PARITY_ERROR(dev)));
else
I915_WRITE_IMR(ring, ~ring->irq_enable_mask);
gen5_enable_gt_irq(dev_priv, ring->irq_enable_mask);
}
spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
return true;
}
static void
gen6_ring_put_irq(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
unsigned long flags;
spin_lock_irqsave(&dev_priv->irq_lock, flags);
if (--ring->irq_refcount == 0) {
if (HAS_L3_DPF(dev) && ring->id == RCS)
I915_WRITE_IMR(ring, ~GT_PARITY_ERROR(dev));
else
I915_WRITE_IMR(ring, ~0);
gen5_disable_gt_irq(dev_priv, ring->irq_enable_mask);
}
spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
}
static bool
hsw_vebox_get_irq(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
unsigned long flags;
if (WARN_ON(!intel_irqs_enabled(dev_priv)))
return false;
spin_lock_irqsave(&dev_priv->irq_lock, flags);
if (ring->irq_refcount++ == 0) {
I915_WRITE_IMR(ring, ~ring->irq_enable_mask);
gen6_enable_pm_irq(dev_priv, ring->irq_enable_mask);
}
spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
return true;
}
static void
hsw_vebox_put_irq(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
unsigned long flags;
spin_lock_irqsave(&dev_priv->irq_lock, flags);
if (--ring->irq_refcount == 0) {
I915_WRITE_IMR(ring, ~0);
gen6_disable_pm_irq(dev_priv, ring->irq_enable_mask);
}
spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
}
static bool
gen8_ring_get_irq(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
unsigned long flags;
if (WARN_ON(!intel_irqs_enabled(dev_priv)))
return false;
spin_lock_irqsave(&dev_priv->irq_lock, flags);
if (ring->irq_refcount++ == 0) {
if (HAS_L3_DPF(dev) && ring->id == RCS) {
I915_WRITE_IMR(ring,
~(ring->irq_enable_mask |
GT_RENDER_L3_PARITY_ERROR_INTERRUPT));
} else {
I915_WRITE_IMR(ring, ~ring->irq_enable_mask);
}
POSTING_READ(RING_IMR(ring->mmio_base));
}
spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
return true;
}
static void
gen8_ring_put_irq(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
unsigned long flags;
spin_lock_irqsave(&dev_priv->irq_lock, flags);
if (--ring->irq_refcount == 0) {
if (HAS_L3_DPF(dev) && ring->id == RCS) {
I915_WRITE_IMR(ring,
~GT_RENDER_L3_PARITY_ERROR_INTERRUPT);
} else {
I915_WRITE_IMR(ring, ~0);
}
POSTING_READ(RING_IMR(ring->mmio_base));
}
spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
}
static int
i965_dispatch_execbuffer(struct drm_i915_gem_request *req,
u64 offset, u32 length,
unsigned dispatch_flags)
{
struct intel_engine_cs *ring = req->ring;
int ret;
ret = intel_ring_begin(req, 2);
if (ret)
return ret;
intel_ring_emit(ring,
MI_BATCH_BUFFER_START |
MI_BATCH_GTT |
(dispatch_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)
#define I830_TLB_ENTRIES (2)
#define I830_WA_SIZE max(I830_TLB_ENTRIES*4096, I830_BATCH_LIMIT)
static int
i830_dispatch_execbuffer(struct drm_i915_gem_request *req,
u64 offset, u32 len,
unsigned dispatch_flags)
{
struct intel_engine_cs *ring = req->ring;
u32 cs_offset = ring->scratch.gtt_offset;
int ret;
ret = intel_ring_begin(req, 6);
if (ret)
return ret;
/* Evict the invalid PTE TLBs */
intel_ring_emit(ring, COLOR_BLT_CMD | BLT_WRITE_RGBA);
intel_ring_emit(ring, BLT_DEPTH_32 | BLT_ROP_COLOR_COPY | 4096);
intel_ring_emit(ring, I830_TLB_ENTRIES << 16 | 4); /* load each page */
intel_ring_emit(ring, cs_offset);
intel_ring_emit(ring, 0xdeadbeef);
intel_ring_emit(ring, MI_NOOP);
intel_ring_advance(ring);
if ((dispatch_flags & I915_DISPATCH_PINNED) == 0) {
if (len > I830_BATCH_LIMIT)
return -ENOSPC;
ret = intel_ring_begin(req, 6 + 2);
if (ret)
return ret;
/* Blit the batch (which has now all relocs applied) to the
* stable batch scratch bo area (so that the CS never
* stumbles over its tlb invalidation bug) ...
*/
intel_ring_emit(ring, SRC_COPY_BLT_CMD | BLT_WRITE_RGBA);
intel_ring_emit(ring, BLT_DEPTH_32 | BLT_ROP_SRC_COPY | 4096);
intel_ring_emit(ring, DIV_ROUND_UP(len, 4096) << 16 | 4096);
intel_ring_emit(ring, cs_offset);
intel_ring_emit(ring, 4096);
intel_ring_emit(ring, offset);
intel_ring_emit(ring, MI_FLUSH);
intel_ring_emit(ring, MI_NOOP);
intel_ring_advance(ring);
/* ... and execute it. */
offset = cs_offset;
}
ret = intel_ring_begin(req, 4);
if (ret)
return ret;
intel_ring_emit(ring, MI_BATCH_BUFFER);
intel_ring_emit(ring, offset | (dispatch_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);
return 0;
}
static int
i915_dispatch_execbuffer(struct drm_i915_gem_request *req,
u64 offset, u32 len,
unsigned dispatch_flags)
{
struct intel_engine_cs *ring = req->ring;
int ret;
ret = intel_ring_begin(req, 2);
if (ret)
return ret;
intel_ring_emit(ring, MI_BATCH_BUFFER_START | MI_BATCH_GTT);
intel_ring_emit(ring, offset | (dispatch_flags & I915_DISPATCH_SECURE ?
0 : MI_BATCH_NON_SECURE));
intel_ring_advance(ring);
return 0;
}
static void cleanup_status_page(struct intel_engine_cs *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_ggtt_unpin(obj);
drm_gem_object_unreference(&obj->base);
ring->status_page.obj = NULL;
}
static int init_status_page(struct intel_engine_cs *ring)
{
struct drm_i915_gem_object *obj;
if ((obj = ring->status_page.obj) == NULL) {
unsigned flags;
int ret;
obj = i915_gem_alloc_object(ring->dev, 4096);
if (obj == NULL) {
DRM_ERROR("Failed to allocate status page\n");
return -ENOMEM;
}
ret = i915_gem_object_set_cache_level(obj, I915_CACHE_LLC);
if (ret)
goto err_unref;
flags = 0;
if (!HAS_LLC(ring->dev))
/* On g33, we cannot place HWS above 256MiB, so
* restrict its pinning to the low mappable arena.
* Though this restriction is not documented for
* gen4, gen5, or byt, they also behave similarly
* and hang if the HWS is placed at the top of the
* GTT. To generalise, it appears that all !llc
* platforms have issues with us placing the HWS
* above the mappable region (even though we never
* actualy map it).
*/
flags |= PIN_MAPPABLE;
ret = i915_gem_obj_ggtt_pin(obj, 4096, flags);
if (ret) {
err_unref:
drm_gem_object_unreference(&obj->base);
return ret;
}
ring->status_page.obj = obj;
}
ring->status_page.gfx_addr = i915_gem_obj_ggtt_offset(obj);
ring->status_page.page_addr = kmap(sg_page(obj->pages->sgl));
memset(ring->status_page.page_addr, 0, PAGE_SIZE);
DRM_DEBUG_DRIVER("%s hws offset: 0x%08x\n",
ring->name, ring->status_page.gfx_addr);
return 0;
}
static int init_phys_status_page(struct intel_engine_cs *ring)
{
struct drm_i915_private *dev_priv = ring->dev->dev_private;
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;
}
ring->status_page.page_addr = dev_priv->status_page_dmah->vaddr;
memset(ring->status_page.page_addr, 0, PAGE_SIZE);
return 0;
}
void intel_unpin_ringbuffer_obj(struct intel_ringbuffer *ringbuf)
{
if (HAS_LLC(ringbuf->obj->base.dev) && !ringbuf->obj->stolen)
vunmap(ringbuf->virtual_start);
else
iounmap(ringbuf->virtual_start);
ringbuf->virtual_start = NULL;
i915_gem_object_ggtt_unpin(ringbuf->obj);
}
static u32 *vmap_obj(struct drm_i915_gem_object *obj)
{
struct sg_page_iter sg_iter;
struct page **pages;
void *addr;
int i;
pages = drm_malloc_ab(obj->base.size >> PAGE_SHIFT, sizeof(*pages));
if (pages == NULL)
return NULL;
i = 0;
for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, 0)
pages[i++] = sg_page_iter_page(&sg_iter);
addr = vmap(pages, i, 0, PAGE_KERNEL);
drm_free_large(pages);
return addr;
}
int intel_pin_and_map_ringbuffer_obj(struct drm_device *dev,
struct intel_ringbuffer *ringbuf)
{
struct drm_i915_private *dev_priv = to_i915(dev);
struct drm_i915_gem_object *obj = ringbuf->obj;
int ret;
if (HAS_LLC(dev_priv) && !obj->stolen) {
ret = i915_gem_obj_ggtt_pin(obj, PAGE_SIZE, 0);
if (ret)
return ret;
ret = i915_gem_object_set_to_cpu_domain(obj, true);
if (ret) {
i915_gem_object_ggtt_unpin(obj);
return ret;
}
ringbuf->virtual_start = vmap_obj(obj);
if (ringbuf->virtual_start == NULL) {
i915_gem_object_ggtt_unpin(obj);
return -ENOMEM;
}
} else {
ret = i915_gem_obj_ggtt_pin(obj, PAGE_SIZE, PIN_MAPPABLE);
if (ret)
return ret;
ret = i915_gem_object_set_to_gtt_domain(obj, true);
if (ret) {
i915_gem_object_ggtt_unpin(obj);
return ret;
}
ringbuf->virtual_start = ioremap_wc(dev_priv->gtt.mappable_base +
i915_gem_obj_ggtt_offset(obj), ringbuf->size);
if (ringbuf->virtual_start == NULL) {
i915_gem_object_ggtt_unpin(obj);
return -EINVAL;
}
}
return 0;
}
static void intel_destroy_ringbuffer_obj(struct intel_ringbuffer *ringbuf)
{
drm_gem_object_unreference(&ringbuf->obj->base);
ringbuf->obj = NULL;
}
static int intel_alloc_ringbuffer_obj(struct drm_device *dev,
struct intel_ringbuffer *ringbuf)
{
struct drm_i915_gem_object *obj;
obj = NULL;
if (!HAS_LLC(dev))
obj = i915_gem_object_create_stolen(dev, ringbuf->size);
if (obj == NULL)
obj = i915_gem_alloc_object(dev, ringbuf->size);
if (obj == NULL)
return -ENOMEM;
/* mark ring buffers as read-only from GPU side by default */
obj->gt_ro = 1;
ringbuf->obj = obj;
return 0;
}
struct intel_ringbuffer *
intel_engine_create_ringbuffer(struct intel_engine_cs *engine, int size)
{
struct intel_ringbuffer *ring;
int ret;
ring = kzalloc(sizeof(*ring), GFP_KERNEL);
if (ring == NULL) {
DRM_DEBUG_DRIVER("Failed to allocate ringbuffer %s\n",
engine->name);
return ERR_PTR(-ENOMEM);
}
ring->ring = engine;
list_add(&ring->link, &engine->buffers);
ring->size = size;
/* Workaround an erratum on the i830 which causes a hang if
* the TAIL pointer points to within the last 2 cachelines
* of the buffer.
*/
ring->effective_size = size;
if (IS_I830(engine->dev) || IS_845G(engine->dev))
ring->effective_size -= 2 * CACHELINE_BYTES;
ring->last_retired_head = -1;
intel_ring_update_space(ring);
ret = intel_alloc_ringbuffer_obj(engine->dev, ring);
if (ret) {
DRM_DEBUG_DRIVER("Failed to allocate ringbuffer %s: %d\n",
engine->name, ret);
list_del(&ring->link);
kfree(ring);
return ERR_PTR(ret);
}
return ring;
}
void
intel_ringbuffer_free(struct intel_ringbuffer *ring)
{
intel_destroy_ringbuffer_obj(ring);
list_del(&ring->link);
kfree(ring);
}
static int intel_init_ring_buffer(struct drm_device *dev,
struct intel_engine_cs *ring)
{
struct intel_ringbuffer *ringbuf;
int ret;
WARN_ON(ring->buffer);
ring->dev = dev;
INIT_LIST_HEAD(&ring->active_list);
INIT_LIST_HEAD(&ring->request_list);
INIT_LIST_HEAD(&ring->execlist_queue);
INIT_LIST_HEAD(&ring->buffers);
i915_gem_batch_pool_init(dev, &ring->batch_pool);
memset(ring->semaphore.sync_seqno, 0, sizeof(ring->semaphore.sync_seqno));
init_waitqueue_head(&ring->irq_queue);
ringbuf = intel_engine_create_ringbuffer(ring, 32 * PAGE_SIZE);
if (IS_ERR(ringbuf)) {
ret = PTR_ERR(ringbuf);
goto error;
}
ring->buffer = ringbuf;
if (I915_NEED_GFX_HWS(dev)) {
ret = init_status_page(ring);
if (ret)
goto error;
} else {
BUG_ON(ring->id != RCS);
ret = init_phys_status_page(ring);
if (ret)
goto error;
}
ret = intel_pin_and_map_ringbuffer_obj(dev, ringbuf);
if (ret) {
DRM_ERROR("Failed to pin and map ringbuffer %s: %d\n",
ring->name, ret);
intel_destroy_ringbuffer_obj(ringbuf);
goto error;
}
ret = i915_cmd_parser_init_ring(ring);
if (ret)
goto error;
return 0;
error:
intel_cleanup_ring_buffer(ring);
return ret;
}
void intel_cleanup_ring_buffer(struct intel_engine_cs *ring)
{
struct drm_i915_private *dev_priv;
if (!intel_ring_initialized(ring))
return;
dev_priv = to_i915(ring->dev);
if (ring->buffer) {
intel_stop_ring_buffer(ring);
WARN_ON(!IS_GEN2(ring->dev) && (I915_READ_MODE(ring) & MODE_IDLE) == 0);
intel_unpin_ringbuffer_obj(ring->buffer);
intel_ringbuffer_free(ring->buffer);
ring->buffer = NULL;
}
if (ring->cleanup)
ring->cleanup(ring);
cleanup_status_page(ring);
i915_cmd_parser_fini_ring(ring);
i915_gem_batch_pool_fini(&ring->batch_pool);
ring->dev = NULL;
}
static int ring_wait_for_space(struct intel_engine_cs *ring, int n)
{
struct intel_ringbuffer *ringbuf = ring->buffer;
struct drm_i915_gem_request *request;
unsigned space;
int ret;
if (intel_ring_space(ringbuf) >= n)
return 0;
/* The whole point of reserving space is to not wait! */
WARN_ON(ringbuf->reserved_in_use);
list_for_each_entry(request, &ring->request_list, list) {
space = __intel_ring_space(request->postfix, ringbuf->tail,
ringbuf->size);
if (space >= n)
break;
}
if (WARN_ON(&request->list == &ring->request_list))
return -ENOSPC;
ret = i915_wait_request(request);
if (ret)
return ret;
ringbuf->space = space;
return 0;
}
static void __wrap_ring_buffer(struct intel_ringbuffer *ringbuf)
{
uint32_t __iomem *virt;
int rem = ringbuf->size - ringbuf->tail;
virt = ringbuf->virtual_start + ringbuf->tail;
rem /= 4;
while (rem--)
iowrite32(MI_NOOP, virt++);
ringbuf->tail = 0;
intel_ring_update_space(ringbuf);
}
int intel_ring_idle(struct intel_engine_cs *ring)
{
struct drm_i915_gem_request *req;
/* Wait upon the last request to be completed */
if (list_empty(&ring->request_list))
return 0;
req = list_entry(ring->request_list.prev,
struct drm_i915_gem_request,
list);
/* Make sure we do not trigger any retires */
return __i915_wait_request(req,
atomic_read(&to_i915(ring->dev)->gpu_error.reset_counter),
to_i915(ring->dev)->mm.interruptible,
NULL, NULL);
}
int intel_ring_alloc_request_extras(struct drm_i915_gem_request *request)
{
request->ringbuf = request->ring->buffer;
return 0;
}
int intel_ring_reserve_space(struct drm_i915_gem_request *request)
{
/*
* The first call merely notes the reserve request and is common for
* all back ends. The subsequent localised _begin() call actually
* ensures that the reservation is available. Without the begin, if
* the request creator immediately submitted the request without
* adding any commands to it then there might not actually be
* sufficient room for the submission commands.
*/
intel_ring_reserved_space_reserve(request->ringbuf, MIN_SPACE_FOR_ADD_REQUEST);
return intel_ring_begin(request, 0);
}
void intel_ring_reserved_space_reserve(struct intel_ringbuffer *ringbuf, int size)
{
WARN_ON(ringbuf->reserved_size);
WARN_ON(ringbuf->reserved_in_use);
ringbuf->reserved_size = size;
}
void intel_ring_reserved_space_cancel(struct intel_ringbuffer *ringbuf)
{
WARN_ON(ringbuf->reserved_in_use);
ringbuf->reserved_size = 0;
ringbuf->reserved_in_use = false;
}
void intel_ring_reserved_space_use(struct intel_ringbuffer *ringbuf)
{
WARN_ON(ringbuf->reserved_in_use);
ringbuf->reserved_in_use = true;
ringbuf->reserved_tail = ringbuf->tail;
}
void intel_ring_reserved_space_end(struct intel_ringbuffer *ringbuf)
{
WARN_ON(!ringbuf->reserved_in_use);
if (ringbuf->tail > ringbuf->reserved_tail) {
WARN(ringbuf->tail > ringbuf->reserved_tail + ringbuf->reserved_size,
"request reserved size too small: %d vs %d!\n",
ringbuf->tail - ringbuf->reserved_tail, ringbuf->reserved_size);
} else {
/*
* The ring was wrapped while the reserved space was in use.
* That means that some unknown amount of the ring tail was
* no-op filled and skipped. Thus simply adding the ring size
* to the tail and doing the above space check will not work.
* Rather than attempt to track how much tail was skipped,
* it is much simpler to say that also skipping the sanity
* check every once in a while is not a big issue.
*/
}
ringbuf->reserved_size = 0;
ringbuf->reserved_in_use = false;
}
static int __intel_ring_prepare(struct intel_engine_cs *ring, int bytes)
{
struct intel_ringbuffer *ringbuf = ring->buffer;
int remain_usable = ringbuf->effective_size - ringbuf->tail;
int remain_actual = ringbuf->size - ringbuf->tail;
int ret, total_bytes, wait_bytes = 0;
bool need_wrap = false;
if (ringbuf->reserved_in_use)
total_bytes = bytes;
else
total_bytes = bytes + ringbuf->reserved_size;
if (unlikely(bytes > remain_usable)) {
/*
* Not enough space for the basic request. So need to flush
* out the remainder and then wait for base + reserved.
*/
wait_bytes = remain_actual + total_bytes;
need_wrap = true;
} else {
if (unlikely(total_bytes > remain_usable)) {
/*
* The base request will fit but the reserved space
* falls off the end. So only need to to wait for the
* reserved size after flushing out the remainder.
*/
wait_bytes = remain_actual + ringbuf->reserved_size;
need_wrap = true;
} else if (total_bytes > ringbuf->space) {
/* No wrapping required, just waiting. */
wait_bytes = total_bytes;
}
}
if (wait_bytes) {
ret = ring_wait_for_space(ring, wait_bytes);
if (unlikely(ret))
return ret;
if (need_wrap)
__wrap_ring_buffer(ringbuf);
}
return 0;
}
int intel_ring_begin(struct drm_i915_gem_request *req,
int num_dwords)
{
struct intel_engine_cs *ring;
struct drm_i915_private *dev_priv;
int ret;
WARN_ON(req == NULL);
ring = req->ring;
dev_priv = ring->dev->dev_private;
ret = i915_gem_check_wedge(&dev_priv->gpu_error,
dev_priv->mm.interruptible);
if (ret)
return ret;
ret = __intel_ring_prepare(ring, num_dwords * sizeof(uint32_t));
if (ret)
return ret;
ring->buffer->space -= num_dwords * sizeof(uint32_t);
return 0;
}
/* Align the ring tail to a cacheline boundary */
int intel_ring_cacheline_align(struct drm_i915_gem_request *req)
{
struct intel_engine_cs *ring = req->ring;
int num_dwords = (ring->buffer->tail & (CACHELINE_BYTES - 1)) / sizeof(uint32_t);
int ret;
if (num_dwords == 0)
return 0;
num_dwords = CACHELINE_BYTES / sizeof(uint32_t) - num_dwords;
ret = intel_ring_begin(req, num_dwords);
if (ret)
return ret;
while (num_dwords--)
intel_ring_emit(ring, MI_NOOP);
intel_ring_advance(ring);
return 0;
}
void intel_ring_init_seqno(struct intel_engine_cs *ring, u32 seqno)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
if (INTEL_INFO(dev)->gen == 6 || INTEL_INFO(dev)->gen == 7) {
I915_WRITE(RING_SYNC_0(ring->mmio_base), 0);
I915_WRITE(RING_SYNC_1(ring->mmio_base), 0);
if (HAS_VEBOX(dev))
I915_WRITE(RING_SYNC_2(ring->mmio_base), 0);
}
ring->set_seqno(ring, seqno);
ring->hangcheck.seqno = seqno;
}
static void gen6_bsd_ring_write_tail(struct intel_engine_cs *ring,
u32 value)
{
struct drm_i915_private *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_bsd_ring_flush(struct drm_i915_gem_request *req,
u32 invalidate, u32 flush)
{
struct intel_engine_cs *ring = req->ring;
uint32_t cmd;
int ret;
ret = intel_ring_begin(req, 4);
if (ret)
return ret;
cmd = MI_FLUSH_DW;
if (INTEL_INFO(ring->dev)->gen >= 8)
cmd += 1;
/* We always require a command barrier so that subsequent
* commands, such as breadcrumb interrupts, are strictly ordered
* wrt the contents of the write cache being flushed to memory
* (and thus being coherent from the CPU).
*/
cmd |= MI_FLUSH_DW_STORE_INDEX | MI_FLUSH_DW_OP_STOREDW;
/*
* Bspec vol 1c.5 - video engine command streamer:
* "If ENABLED, all TLBs will be invalidated once the flush
* operation is complete. This bit is only valid when the
* Post-Sync Operation field is a value of 1h or 3h."
*/
if (invalidate & I915_GEM_GPU_DOMAINS)
cmd |= MI_INVALIDATE_TLB | MI_INVALIDATE_BSD;
intel_ring_emit(ring, cmd);
intel_ring_emit(ring, I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT);
if (INTEL_INFO(ring->dev)->gen >= 8) {
intel_ring_emit(ring, 0); /* upper addr */
intel_ring_emit(ring, 0); /* value */
} else {
intel_ring_emit(ring, 0);
intel_ring_emit(ring, MI_NOOP);
}
intel_ring_advance(ring);
return 0;
}
static int
gen8_ring_dispatch_execbuffer(struct drm_i915_gem_request *req,
u64 offset, u32 len,
unsigned dispatch_flags)
{
struct intel_engine_cs *ring = req->ring;
bool ppgtt = USES_PPGTT(ring->dev) &&
!(dispatch_flags & I915_DISPATCH_SECURE);
int ret;
ret = intel_ring_begin(req, 4);
if (ret)
return ret;
/* FIXME(BDW): Address space and security selectors. */
intel_ring_emit(ring, MI_BATCH_BUFFER_START_GEN8 | (ppgtt<<8) |
(dispatch_flags & I915_DISPATCH_RS ?
MI_BATCH_RESOURCE_STREAMER : 0));
intel_ring_emit(ring, lower_32_bits(offset));
intel_ring_emit(ring, upper_32_bits(offset));
intel_ring_emit(ring, MI_NOOP);
intel_ring_advance(ring);
return 0;
}
static int
hsw_ring_dispatch_execbuffer(struct drm_i915_gem_request *req,
u64 offset, u32 len,
unsigned dispatch_flags)
{
struct intel_engine_cs *ring = req->ring;
int ret;
ret = intel_ring_begin(req, 2);
if (ret)
return ret;
intel_ring_emit(ring,
MI_BATCH_BUFFER_START |
(dispatch_flags & I915_DISPATCH_SECURE ?
0 : MI_BATCH_PPGTT_HSW | MI_BATCH_NON_SECURE_HSW) |
(dispatch_flags & I915_DISPATCH_RS ?
MI_BATCH_RESOURCE_STREAMER : 0));
/* bit0-7 is the length on GEN6+ */
intel_ring_emit(ring, offset);
intel_ring_advance(ring);
return 0;
}
static int
gen6_ring_dispatch_execbuffer(struct drm_i915_gem_request *req,
u64 offset, u32 len,
unsigned dispatch_flags)
{
struct intel_engine_cs *ring = req->ring;
int ret;
ret = intel_ring_begin(req, 2);
if (ret)
return ret;
intel_ring_emit(ring,
MI_BATCH_BUFFER_START |
(dispatch_flags & I915_DISPATCH_SECURE ?
0 : MI_BATCH_NON_SECURE_I965));
/* bit0-7 is the length on GEN6+ */
intel_ring_emit(ring, offset);
intel_ring_advance(ring);
return 0;
}
/* Blitter support (SandyBridge+) */
static int gen6_ring_flush(struct drm_i915_gem_request *req,
u32 invalidate, u32 flush)
{
struct intel_engine_cs *ring = req->ring;
struct drm_device *dev = ring->dev;
uint32_t cmd;
int ret;
ret = intel_ring_begin(req, 4);
if (ret)
return ret;
cmd = MI_FLUSH_DW;
if (INTEL_INFO(dev)->gen >= 8)
cmd += 1;
/* We always require a command barrier so that subsequent
* commands, such as breadcrumb interrupts, are strictly ordered
* wrt the contents of the write cache being flushed to memory
* (and thus being coherent from the CPU).
*/
cmd |= MI_FLUSH_DW_STORE_INDEX | MI_FLUSH_DW_OP_STOREDW;
/*
* Bspec vol 1c.3 - blitter engine command streamer:
* "If ENABLED, all TLBs will be invalidated once the flush
* operation is complete. This bit is only valid when the
* Post-Sync Operation field is a value of 1h or 3h."
*/
if (invalidate & I915_GEM_DOMAIN_RENDER)
cmd |= MI_INVALIDATE_TLB;
intel_ring_emit(ring, cmd);
intel_ring_emit(ring, I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT);
if (INTEL_INFO(dev)->gen >= 8) {
intel_ring_emit(ring, 0); /* upper addr */
intel_ring_emit(ring, 0); /* value */
} else {
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)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_engine_cs *ring = &dev_priv->ring[RCS];
struct drm_i915_gem_object *obj;
int ret;
ring->name = "render ring";
ring->id = RCS;
ring->mmio_base = RENDER_RING_BASE;
if (INTEL_INFO(dev)->gen >= 8) {
if (i915_semaphore_is_enabled(dev)) {
obj = i915_gem_alloc_object(dev, 4096);
if (obj == NULL) {
DRM_ERROR("Failed to allocate semaphore bo. Disabling semaphores\n");
i915.semaphores = 0;
} else {
i915_gem_object_set_cache_level(obj, I915_CACHE_LLC);
ret = i915_gem_obj_ggtt_pin(obj, 0, PIN_NONBLOCK);
if (ret != 0) {
drm_gem_object_unreference(&obj->base);
DRM_ERROR("Failed to pin semaphore bo. Disabling semaphores\n");
i915.semaphores = 0;
} else
dev_priv->semaphore_obj = obj;
}
}
ring->init_context = intel_rcs_ctx_init;
ring->add_request = gen6_add_request;
ring->flush = gen8_render_ring_flush;
ring->irq_get = gen8_ring_get_irq;
ring->irq_put = gen8_ring_put_irq;
ring->irq_enable_mask = GT_RENDER_USER_INTERRUPT;
ring->get_seqno = gen6_ring_get_seqno;
ring->set_seqno = ring_set_seqno;
if (i915_semaphore_is_enabled(dev)) {
WARN_ON(!dev_priv->semaphore_obj);
ring->semaphore.sync_to = gen8_ring_sync;
ring->semaphore.signal = gen8_rcs_signal;
GEN8_RING_SEMAPHORE_INIT;
}
} else if (INTEL_INFO(dev)->gen >= 6) {
ring->init_context = intel_rcs_ctx_init;
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_RENDER_USER_INTERRUPT;
ring->get_seqno = gen6_ring_get_seqno;
ring->set_seqno = ring_set_seqno;
if (i915_semaphore_is_enabled(dev)) {
ring->semaphore.sync_to = gen6_ring_sync;
ring->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. Gen8 will initialize the
* sema between VCS2 and RCS later.
*/
ring->semaphore.mbox.wait[RCS] = MI_SEMAPHORE_SYNC_INVALID;
ring->semaphore.mbox.wait[VCS] = MI_SEMAPHORE_SYNC_RV;
ring->semaphore.mbox.wait[BCS] = MI_SEMAPHORE_SYNC_RB;
ring->semaphore.mbox.wait[VECS] = MI_SEMAPHORE_SYNC_RVE;
ring->semaphore.mbox.wait[VCS2] = MI_SEMAPHORE_SYNC_INVALID;
ring->semaphore.mbox.signal[RCS] = GEN6_NOSYNC;
ring->semaphore.mbox.signal[VCS] = GEN6_VRSYNC;
ring->semaphore.mbox.signal[BCS] = GEN6_BRSYNC;
ring->semaphore.mbox.signal[VECS] = GEN6_VERSYNC;
ring->semaphore.mbox.signal[VCS2] = GEN6_NOSYNC;
}
} 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_RENDER_USER_INTERRUPT |
GT_RENDER_PIPECTL_NOTIFY_INTERRUPT;
} 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 (IS_GEN8(dev))
ring->dispatch_execbuffer = gen8_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_hw = init_render_ring;
ring->cleanup = render_ring_cleanup;
/* Workaround batchbuffer to combat CS tlb bug. */
if (HAS_BROKEN_CS_TLB(dev)) {
obj = i915_gem_alloc_object(dev, I830_WA_SIZE);
if (obj == NULL) {
DRM_ERROR("Failed to allocate batch bo\n");
return -ENOMEM;
}
ret = i915_gem_obj_ggtt_pin(obj, 0, 0);
if (ret != 0) {
drm_gem_object_unreference(&obj->base);
DRM_ERROR("Failed to ping batch bo\n");
return ret;
}
ring->scratch.obj = obj;
ring->scratch.gtt_offset = i915_gem_obj_ggtt_offset(obj);
}
ret = intel_init_ring_buffer(dev, ring);
if (ret)
return ret;
if (INTEL_INFO(dev)->gen >= 5) {
ret = intel_init_pipe_control(ring);
if (ret)
return ret;
}
return 0;
}
int intel_init_bsd_ring_buffer(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_engine_cs *ring = &dev_priv->ring[VCS];
ring->name = "bsd ring";
ring->id = VCS;
ring->write_tail = ring_write_tail;
if (INTEL_INFO(dev)->gen >= 6) {