cregit-Linux how code gets into the kernel

Release 4.17 drivers/gpu/drm/i915/intel_ringbuffer.c

Directory: drivers/gpu/drm/i915
/*
 * Copyright © 2008-2010 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * Authors:
 *    Eric Anholt <eric@anholt.net>
 *    Zou Nan hai <nanhai.zou@intel.com>
 *    Xiang Hai hao<haihao.xiang@intel.com>
 *
 */

#include <linux/log2.h>

#include <drm/drmP.h>
#include <drm/i915_drm.h>

#include "i915_drv.h"
#include "i915_gem_render_state.h"
#include "i915_trace.h"
#include "intel_drv.h"

/* Rough estimate of the typical request size, performing a flush,
 * set-context and then emitting the batch.
 */

#define LEGACY_REQUEST_SIZE 200




static unsigned int __intel_ring_space(unsigned int head,
				       unsigned int tail,
				       unsigned int size)
{
	/*
         * "If the Ring Buffer Head Pointer and the Tail Pointer are on the
         * same cacheline, the Head Pointer must not be greater than the Tail
         * Pointer."
         */
	GEM_BUG_ON(!is_power_of_2(size));
	return (head - tail - CACHELINE_BYTES) & (size - 1);
}


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Chris Wilson4193.18%350.00%


Tvrtko A. Ursulin12.27%116.67%


Oscar Mateo12.27%116.67%


Dave Gordon12.27%116.67%


Total44100.00%6100.00%






unsigned int intel_ring_update_space(struct intel_ring *ring)
{
	unsigned int space;

	space = __intel_ring_space(ring->head, ring->emit, ring->size);

	ring->space = space;
	return space;
}


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Chris Wilson2868.29%550.00%


Oscar Mateo819.51%440.00%


Dave Gordon512.20%110.00%


Total41100.00%10100.00%





static int

gen2_render_ring_flush(struct i915_request *rq, u32 mode)
{
	u32 cmd, *cs;

	cmd = MI_FLUSH;

	if (mode & EMIT_INVALIDATE)
		cmd |= MI_READ_FLUSH;

	cs = intel_ring_begin(rq, 2);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	*cs++ = cmd;
	*cs++ = MI_NOOP;
	intel_ring_advance(rq, cs);

	return 0;
}


Contributors
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Chris Wilson5570.51%466.67%


Tvrtko A. Ursulin2228.21%116.67%


Zou Nan hai11.28%116.67%


Total78100.00%6100.00%





static int

gen4_render_ring_flush(struct i915_request *rq, u32 mode)
{
	u32 cmd, *cs;

	/*
         * read/write caches:
         *
         * I915_GEM_DOMAIN_RENDER is always invalidated, but is
         * only flushed if MI_NO_WRITE_FLUSH is unset.  On 965, it is
         * also flushed at 2d versus 3d pipeline switches.
         *
         * read-only caches:
         *
         * I915_GEM_DOMAIN_SAMPLER is flushed on pre-965 if
         * MI_READ_FLUSH is set, and is always flushed on 965.
         *
         * I915_GEM_DOMAIN_COMMAND may not exist?
         *
         * I915_GEM_DOMAIN_INSTRUCTION, which exists on 965, is
         * invalidated when MI_EXE_FLUSH is set.
         *
         * I915_GEM_DOMAIN_VERTEX, which exists on 965, is
         * invalidated with every MI_FLUSH.
         *
         * TLBs:
         *
         * On 965, TLBs associated with I915_GEM_DOMAIN_COMMAND
         * and I915_GEM_DOMAIN_CPU in are invalidated at PTE write and
         * I915_GEM_DOMAIN_RENDER and I915_GEM_DOMAIN_SAMPLER
         * are flushed at any MI_FLUSH.
         */

	cmd = MI_FLUSH;
	if (mode & EMIT_INVALIDATE) {
		cmd |= MI_EXE_FLUSH;
		if (IS_G4X(rq->i915) || IS_GEN5(rq->i915))
			cmd |= MI_INVALIDATE_ISP;
	}

	cs = intel_ring_begin(rq, 2);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	*cs++ = cmd;
	*cs++ = MI_NOOP;
	intel_ring_advance(rq, cs);

	return 0;
}


Contributors
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Chris Wilson4746.53%1071.43%


Eric Anholt2322.77%17.14%


Tvrtko A. Ursulin2221.78%17.14%


Zou Nan hai98.91%214.29%


Total101100.00%14100.00%



/*
 * Emits a PIPE_CONTROL with a non-zero post-sync operation, for
 * implementing two workarounds on gen6.  From section 1.4.7.1
 * "PIPE_CONTROL" of the Sandy Bridge PRM volume 2 part 1:
 *
 * [DevSNB-C+{W/A}] Before any depth stall flush (including those
 * produced by non-pipelined state commands), software needs to first
 * send a PIPE_CONTROL with no bits set except Post-Sync Operation !=
 * 0.
 *
 * [Dev-SNB{W/A}]: Before a PIPE_CONTROL with Write Cache Flush Enable
 * =1, a PIPE_CONTROL with any non-zero post-sync-op is required.
 *
 * And the workaround for these two requires this workaround first:
 *
 * [Dev-SNB{W/A}]: Pipe-control with CS-stall bit set must be sent
 * BEFORE the pipe-control with a post-sync op and no write-cache
 * flushes.
 *
 * And this last workaround is tricky because of the requirements on
 * that bit.  From section 1.4.7.2.3 "Stall" of the Sandy Bridge PRM
 * volume 2 part 1:
 *
 *     "1 of the following must also be set:
 *      - Render Target Cache Flush Enable ([12] of DW1)
 *      - Depth Cache Flush Enable ([0] of DW1)
 *      - Stall at Pixel Scoreboard ([1] of DW1)
 *      - Depth Stall ([13] of DW1)
 *      - Post-Sync Operation ([13] of DW1)
 *      - Notify Enable ([8] of DW1)"
 *
 * The cache flushes require the workaround flush that triggered this
 * one, so we can't use it.  Depth stall would trigger the same.
 * Post-sync nonzero is what triggered this second workaround, so we
 * can't use that one either.  Notify enable is IRQs, which aren't
 * really our business.  That leaves only stall at scoreboard.
 */


static int

intel_emit_post_sync_nonzero_flush(struct i915_request *rq)
{
	u32 scratch_addr =
		i915_ggtt_offset(rq->engine->scratch) + 2 * CACHELINE_BYTES;
	u32 *cs;

	cs = intel_ring_begin(rq, 6);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	*cs++ = GFX_OP_PIPE_CONTROL(5);
	*cs++ = PIPE_CONTROL_CS_STALL | PIPE_CONTROL_STALL_AT_SCOREBOARD;
	*cs++ = scratch_addr | PIPE_CONTROL_GLOBAL_GTT;
	*cs++ = 0; /* low dword */
	*cs++ = 0; /* high dword */
	*cs++ = MI_NOOP;
	intel_ring_advance(rq, cs);

	cs = intel_ring_begin(rq, 6);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	*cs++ = GFX_OP_PIPE_CONTROL(5);
	*cs++ = PIPE_CONTROL_QW_WRITE;
	*cs++ = scratch_addr | PIPE_CONTROL_GLOBAL_GTT;
	*cs++ = 0;
	*cs++ = 0;
	*cs++ = MI_NOOP;
	intel_ring_advance(rq, cs);

	return 0;
}


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Tvrtko A. Ursulin7441.57%225.00%


Chris Wilson158.43%562.50%


Total178100.00%8100.00%





static int

gen6_render_ring_flush(struct i915_request *rq, u32 mode)
{
	u32 scratch_addr =
		i915_ggtt_offset(rq->engine->scratch) + 2 * CACHELINE_BYTES;
	u32 *cs, flags = 0;
	int ret;

	/* Force SNB workarounds for PIPE_CONTROL flushes */
	ret = intel_emit_post_sync_nonzero_flush(rq);
	if (ret)
		return ret;

	/* Just flush everything.  Experiments have shown that reducing the
         * number of bits based on the write domains has little performance
         * impact.
         */
	if (mode & EMIT_FLUSH) {
		flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH;
		flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH;
		/*
                 * Ensure that any following seqno writes only happen
                 * when the render cache is indeed flushed.
                 */
		flags |= PIPE_CONTROL_CS_STALL;
	}
	if (mode & EMIT_INVALIDATE) {
		flags |= PIPE_CONTROL_TLB_INVALIDATE;
		flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE;
		flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE;
		flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE;
		flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE;
		flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE;
		/*
                 * TLB invalidate requires a post-sync write.
                 */
		flags |= PIPE_CONTROL_QW_WRITE | PIPE_CONTROL_CS_STALL;
	}

	cs = intel_ring_begin(rq, 4);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	*cs++ = GFX_OP_PIPE_CONTROL(4);
	*cs++ = flags;
	*cs++ = scratch_addr | PIPE_CONTROL_GLOBAL_GTT;
	*cs++ = 0;
	intel_ring_advance(rq, cs);

	return 0;
}


Contributors
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Jesse Barnes7341.01%213.33%


Chris Wilson5430.34%853.33%


Tvrtko A. Ursulin3117.42%213.33%


Paulo Zanoni147.87%16.67%


Ben Widawsky31.69%16.67%


Daniel Vetter31.69%16.67%


Total178100.00%15100.00%





static int

gen7_render_ring_cs_stall_wa(struct i915_request *rq)
{
	u32 *cs;

	cs = intel_ring_begin(rq, 4);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	*cs++ = GFX_OP_PIPE_CONTROL(4);
	*cs++ = PIPE_CONTROL_CS_STALL | PIPE_CONTROL_STALL_AT_SCOREBOARD;
	*cs++ = 0;
	*cs++ = 0;
	intel_ring_advance(rq, cs);

	return 0;
}


Contributors
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Paulo Zanoni3951.32%120.00%


Tvrtko A. Ursulin2938.16%120.00%


Chris Wilson67.89%240.00%


John Harrison22.63%120.00%


Total76100.00%5100.00%





static int

gen7_render_ring_flush(struct i915_request *rq, u32 mode)
{
	u32 scratch_addr =
		i915_ggtt_offset(rq->engine->scratch) + 2 * CACHELINE_BYTES;
	u32 *cs, flags = 0;

	/*
         * Ensure that any following seqno writes only happen when the render
         * cache is indeed flushed.
         *
         * Workaround: 4th PIPE_CONTROL command (except the ones with only
         * read-cache invalidate bits set) must have the CS_STALL bit set. We
         * don't try to be clever and just set it unconditionally.
         */
	flags |= PIPE_CONTROL_CS_STALL;

	/* Just flush everything.  Experiments have shown that reducing the
         * number of bits based on the write domains has little performance
         * impact.
         */
	if (mode & EMIT_FLUSH) {
		flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH;
		flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH;
		flags |= PIPE_CONTROL_DC_FLUSH_ENABLE;
		flags |= PIPE_CONTROL_FLUSH_ENABLE;
	}
	if (mode & EMIT_INVALIDATE) {
		flags |= PIPE_CONTROL_TLB_INVALIDATE;
		flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE;
		flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE;
		flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE;
		flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE;
		flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE;
		flags |= PIPE_CONTROL_MEDIA_STATE_CLEAR;
		/*
                 * TLB invalidate requires a post-sync write.
                 */
		flags |= PIPE_CONTROL_QW_WRITE;
		flags |= PIPE_CONTROL_GLOBAL_GTT_IVB;

		flags |= PIPE_CONTROL_STALL_AT_SCOREBOARD;

		/* Workaround: we must issue a pipe_control with CS-stall bit
                 * set before a pipe_control command that has the state cache
                 * invalidate bit set. */
		gen7_render_ring_cs_stall_wa(rq);
	}

	cs = intel_ring_begin(rq, 4);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	*cs++ = GFX_OP_PIPE_CONTROL(4);
	*cs++ = flags;
	*cs++ = scratch_addr;
	*cs++ = 0;
	intel_ring_advance(rq, cs);

	return 0;
}


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Paulo Zanoni10557.69%213.33%


Chris Wilson3820.88%960.00%


Tvrtko A. Ursulin3117.03%213.33%


Ville Syrjälä42.20%16.67%


Francisco Jerez42.20%16.67%


Total182100.00%15100.00%






static void ring_setup_phys_status_page(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;
	u32 addr;

	addr = dev_priv->status_page_dmah->busaddr;
	if (INTEL_GEN(dev_priv) >= 4)
		addr |= (dev_priv->status_page_dmah->busaddr >> 28) & 0xf0;
	I915_WRITE(HWS_PGA, addr);
}


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Daniel Vetter5590.16%125.00%


Chris Wilson34.92%125.00%


Tvrtko A. Ursulin23.28%125.00%


Oscar Mateo11.64%125.00%


Total61100.00%4100.00%






static void intel_ring_setup_status_page(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;
	i915_reg_t mmio;

	/* The ring status page addresses are no longer next to the rest of
         * the ring registers as of gen7.
         */
	if (IS_GEN7(dev_priv)) {
		switch (engine->id) {
		/*
                 * No more rings exist on Gen7. Default case is only to shut up
                 * gcc switch check warning.
                 */
		default:
			GEM_BUG_ON(engine->id);
		case RCS:
			mmio = RENDER_HWS_PGA_GEN7;
			break;
		case BCS:
			mmio = BLT_HWS_PGA_GEN7;
			break;
		case VCS:
			mmio = BSD_HWS_PGA_GEN7;
			break;
		case VECS:
			mmio = VEBOX_HWS_PGA_GEN7;
			break;
		}
	} else if (IS_GEN6(dev_priv)) {
		mmio = RING_HWS_PGA_GEN6(engine->mmio_base);
	} else {
		mmio = RING_HWS_PGA(engine->mmio_base);
	}

	if (INTEL_GEN(dev_priv) >= 6)
		I915_WRITE(RING_HWSTAM(engine->mmio_base), 0xffffffff);

	I915_WRITE(mmio, engine->status_page.ggtt_offset);
	POSTING_READ(mmio);

	/* Flush the TLB for this page */
	if (IS_GEN(dev_priv, 6, 7)) {
		i915_reg_t reg = RING_INSTPM(engine->mmio_base);

		/* ring should be idle before issuing a sync flush*/
		WARN_ON((I915_READ_MODE(engine) & MODE_IDLE) == 0);

		I915_WRITE(reg,
			   _MASKED_BIT_ENABLE(INSTPM_TLB_INVALIDATE |
					      INSTPM_SYNC_FLUSH));
		if (intel_wait_for_register(dev_priv,
					    reg, INSTPM_SYNC_FLUSH, 0,
					    1000))
			DRM_ERROR("%s: wait for SyncFlush to complete for TLB invalidation timed out\n",
				  engine->name);
	}
}


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Damien Lespiau16975.11%110.00%


Ville Syrjälä2310.22%220.00%


Tvrtko A. Ursulin135.78%220.00%


Chris Wilson114.89%440.00%


Michel Thierry94.00%110.00%


Total225100.00%10100.00%






static bool stop_ring(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;

	if (INTEL_GEN(dev_priv) > 2) {
		I915_WRITE_MODE(engine, _MASKED_BIT_ENABLE(STOP_RING));
		if (intel_wait_for_register(dev_priv,
					    RING_MI_MODE(engine->mmio_base),
					    MODE_IDLE,
					    MODE_IDLE,
					    1000)) {
			DRM_ERROR("%s : timed out trying to stop ring\n",
				  engine->name);
			/* Sometimes we observe that the idle flag is not
                         * set even though the ring is empty. So double
                         * check before giving up.
                         */
			if (I915_READ_HEAD(engine) != I915_READ_TAIL(engine))
				return false;
		}
	}

	I915_WRITE_HEAD(engine, I915_READ_TAIL(engine));

	I915_WRITE_HEAD(engine, 0);
	I915_WRITE_TAIL(engine, 0);

	/* The ring must be empty before it is disabled */
	I915_WRITE_CTL(engine, 0);

	return (I915_READ_HEAD(engine) & HEAD_ADDR) == 0;
}


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Chris Wilson7859.09%738.89%


Naresh Kumar Kachhi1712.88%211.11%


Tvrtko A. Ursulin118.33%15.56%


Daniel Vetter86.06%316.67%


Zou Nan hai86.06%15.56%


Eric Anholt75.30%15.56%


Xiang, Haihao10.76%15.56%


Oscar Mateo10.76%15.56%


Jani Nikula10.76%15.56%


Total132100.00%18100.00%






static int init_ring_common(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;
	struct intel_ring *ring = engine->buffer;
	int ret = 0;

	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);

	if (!stop_ring(engine)) {
		/* G45 ring initialization often fails to reset head to zero */
		DRM_DEBUG_DRIVER("%s head not reset to zero "
				"ctl %08x head %08x tail %08x start %08x\n",
				engine->name,
				I915_READ_CTL(engine),
				I915_READ_HEAD(engine),
				I915_READ_TAIL(engine),
				I915_READ_START(engine));

		if (!stop_ring(engine)) {
			DRM_ERROR("failed to set %s head to zero "
				  "ctl %08x head %08x tail %08x start %08x\n",
				  engine->name,
				  I915_READ_CTL(engine),
				  I915_READ_HEAD(engine),
				  I915_READ_TAIL(engine),
				  I915_READ_START(engine));
			ret = -EIO;
			goto out;
		}
	}

	if (HWS_NEEDS_PHYSICAL(dev_priv))
		ring_setup_phys_status_page(engine);
	else
		intel_ring_setup_status_page(engine);

	intel_engine_reset_breadcrumbs(engine);

	/* Enforce ordering by reading HEAD register back */
	I915_READ_HEAD(engine);

	/* Initialize the ring. This must happen _after_ we've cleared the ring
         * registers with the above sequence (the readback of the HEAD registers
         * also enforces ordering), otherwise the hw might lose the new ring
         * register values. */
	I915_WRITE_START(engine, i915_ggtt_offset(ring->vma));

	/* WaClearRingBufHeadRegAtInit:ctg,elk */
	if (I915_READ_HEAD(engine))
		DRM_DEBUG_DRIVER("%s initialization failed [head=%08x], fudging\n",
				 engine->name, I915_READ_HEAD(engine));

	intel_ring_update_space(ring);
	I915_WRITE_HEAD(engine, ring->head);
	I915_WRITE_TAIL(engine, ring->tail);
	(void)I915_READ_TAIL(engine);

	I915_WRITE_CTL(engine, RING_CTL_SIZE(ring->size) | RING_VALID);

	/* If the head is still not zero, the ring is dead */
	if (intel_wait_for_register(dev_priv, RING_CTL(engine->mmio_base),
				    RING_VALID, RING_VALID,
				    50)) {
		DRM_ERROR("%s initialization failed "
			  "ctl %08x (valid? %d) head %08x [%08x] tail %08x [%08x] start %08x [expected %08x]\n",
			  engine->name,
			  I915_READ_CTL(engine),
			  I915_READ_CTL(engine) & RING_VALID,
			  I915_READ_HEAD(engine), ring->head,
			  I915_READ_TAIL(engine), ring->tail,
			  I915_READ_START(engine),
			  i915_ggtt_offset(ring->vma));
		ret = -EIO;
		goto out;
	}

	intel_engine_init_hangcheck(engine);

	if (INTEL_GEN(dev_priv) > 2)
		I915_WRITE_MODE(engine, _MASKED_BIT_DISABLE(STOP_RING));

out:
	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);

	return ret;
}


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Chris Wilson19253.63%1647.06%


Zou Nan hai5615.64%12.94%


Daniel Vetter328.94%617.65%


Tvrtko A. Ursulin328.94%12.94%


Eric Anholt267.26%12.94%


Jiri Kosina51.40%12.94%


Oscar Mateo41.12%38.82%


Sean Paul30.84%12.94%


Carlos Santa30.84%12.94%


Mika Kuoppala20.56%12.94%


Deepak S20.56%12.94%


Tomas Elf10.28%12.94%


Total358100.00%34100.00%






static void reset_ring_common(struct intel_engine_cs *engine,
			      struct i915_request *request)
{
	/*
         * RC6 must be prevented until the reset is complete and the engine
         * reinitialised. If it occurs in the middle of this sequence, the
         * state written to/loaded from the power context is ill-defined (e.g.
         * the PP_BASE_DIR may be lost).
         */
	assert_forcewakes_active(engine->i915, FORCEWAKE_ALL);

	/*
         * Try to restore the logical GPU state to match the continuation
         * of the request queue. If we skip the context/PD restore, then
         * the next request may try to execute assuming that its context
         * is valid and loaded on the GPU and so may try to access invalid
         * memory, prompting repeated GPU hangs.
         *
         * If the request was guilty, we still restore the logical state
         * in case the next request requires it (e.g. the aliasing ppgtt),
         * but skip over the hung batch.
         *
         * If the request was innocent, we try to replay the request with
         * the restored context.
         */
	if (request) {
		struct drm_i915_private *dev_priv = request->i915;
		struct intel_context *ce = &request->ctx->engine[engine->id];
		struct i915_hw_ppgtt *ppgtt;

		if (ce->state) {
			I915_WRITE(CCID,
				   i915_ggtt_offset(ce->state) |
				   BIT(8) /* must be set! */ |
				   CCID_EXTENDED_STATE_SAVE |
				   CCID_EXTENDED_STATE_RESTORE |
				   CCID_EN);
		}

		ppgtt = request->ctx->ppgtt ?: engine->i915->mm.aliasing_ppgtt;
		if (ppgtt) {
			u32 pd_offset = ppgtt->pd.base.ggtt_offset << 10;

			I915_WRITE(RING_PP_DIR_DCLV(engine), PP_DIR_DCLV_2G);
			I915_WRITE(RING_PP_DIR_BASE(engine), pd_offset);

			/* Wait for the PD reload to complete */
			if (intel_wait_for_register(dev_priv,
						    RING_PP_DIR_BASE(engine),
						    BIT(0), 0,
						    10))
				DRM_ERROR("Wait for reload of ppgtt page-directory timed out\n");

			ppgtt->pd_dirty_rings &= ~intel_engine_flag(engine);
		}

		/* If the rq hung, jump to its breadcrumb and skip the batch */
		if (request->fence.error == -EIO)
			request->ring->head = request->postfix;
	} else {
		engine->legacy_active_context = NULL;
		engine->legacy_active_ppgtt = NULL;
	}
}


Contributors
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Chris Wilson226100.00%5100.00%


Total226100.00%5100.00%






static int intel_rcs_ctx_init(struct i915_request *rq)
{
	int ret;

	ret = intel_ring_workarounds_emit(rq);
	if (ret != 0)
		return ret;

	ret = i915_gem_render_state_emit(rq);
	if (ret)
		return ret;

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Daniel Vetter3982.98%125.00%


Chris Wilson817.02%375.00%


Total47100.00%4100.00%






static int init_render_ring(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;
	int ret = init_ring_common(engine);
	if (ret)
		return ret;

	/* WaTimedSingleVertexDispatch:cl,bw,ctg,elk,ilk,snb */
	if (IS_GEN(dev_priv, 4, 6))
		I915_WRITE(MI_MODE, _MASKED_BIT_ENABLE(VS_TIMER_DISPATCH));

	/* We need to disable the AsyncFlip performance optimisations in order
         * to use MI_WAIT_FOR_EVENT within the CS. It should already be
         * programmed to '1' on all products.
         *
         * WaDisableAsyncFlipPerfMode:snb,ivb,hsw,vlv
         */
	if (IS_GEN(dev_priv, 6, 7))
		I915_WRITE(MI_MODE, _MASKED_BIT_ENABLE(ASYNC_FLIP_PERF_DISABLE));

	/* Required for the hardware to program scanline values for waiting */
	/* WaEnableFlushTlbInvalidationMode:snb */
	if (IS_GEN6(dev_priv))
		I915_WRITE(GFX_MODE,
			   _MASKED_BIT_ENABLE(GFX_TLB_INVALIDATE_EXPLICIT));

	/* WaBCSVCSTlbInvalidationMode:ivb,vlv,hsw */
	if (IS_GEN7(dev_priv))
		I915_WRITE(GFX_MODE_GEN7,
			   _MASKED_BIT_ENABLE(GFX_TLB_INVALIDATE_EXPLICIT) |
			   _MASKED_BIT_ENABLE(GFX_REPLAY_MODE));

	if (IS_GEN6(dev_priv)) {
		/* From the Sandybridge PRM, volume 1 part 3, page 24:
                 * "If this bit is set, STCunit will have LRA as replacement
                 *  policy. [...] This bit must be reset.  LRA replacement
                 *  policy is not supported."
                 */
		I915_WRITE(CACHE_MODE_0,
			   _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB));
	}

	if (IS_GEN(dev_priv, 6, 7))
		I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_FORCE_ORDERING));

	if (INTEL_GEN(dev_priv) >= 6)
		I915_WRITE_IMR(engine, ~engine->irq_keep_mask);

	return init_workarounds_ring(engine);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson6233.16%1034.48%


Daniel Vetter2714.44%26.90%


Jesse Barnes189.63%13.45%


Tvrtko A. Ursulin179.09%310.34%


Ben Widawsky168.56%26.90%


Ville Syrjälä105.35%310.34%


Eric Anholt105.35%13.45%


Zou Nan hai94.81%13.45%


Konrad Zapalowicz73.74%13.45%


Akash Goel63.21%26.90%


Mika Kuoppala31.60%13.45%


Imre Deak10.53%13.45%


Oscar Mateo10.53%13.45%


Total187100.00%29100.00%






static u32 *gen6_signal(struct i915_request *rq, u32 *cs)
{
	struct drm_i915_private *dev_priv = rq->i915;
	struct intel_engine_cs *engine;
	enum intel_engine_id id;
	int num_rings = 0;

	for_each_engine(engine, dev_priv, id) {
		i915_reg_t mbox_reg;

		if (!(BIT(engine->hw_id) & GEN6_SEMAPHORES_MASK))
			continue;

		mbox_reg = rq->engine->semaphore.mbox.signal[engine->hw_id];
		if (i915_mmio_reg_valid(mbox_reg)) {
			*cs++ = MI_LOAD_REGISTER_IMM(1);
			*cs++ = i915_mmio_reg_offset(mbox_reg);
			*cs++ = rq->global_seqno;
			num_rings++;
		}
	}
	if (num_rings & 1)
		*cs++ = MI_NOOP;

	return cs;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson8259.85%763.64%


Ben Widawsky4331.39%19.09%


Tvrtko A. Ursulin64.38%19.09%


Dave Gordon53.65%19.09%


Akash Goel10.73%19.09%


Total137100.00%11100.00%






static void cancel_requests(struct intel_engine_cs *engine)
{
	struct i915_request *request;
	unsigned long flags;

	spin_lock_irqsave(&engine->timeline->lock, flags);

	/* Mark all submitted requests as skipped. */
	list_for_each_entry(request, &engine->timeline->requests, link) {
		GEM_BUG_ON(!request->global_seqno);
		if (!i915_request_completed(request))
			dma_fence_set_error(&request->fence, -EIO);
	}
	/* Remaining _unready_ requests will be nop'ed when submitted */

	spin_unlock_irqrestore(&engine->timeline->lock, flags);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson5971.08%660.00%


Ben Widawsky1821.69%110.00%


Daniel Vetter56.02%220.00%


Dave Gordon11.20%110.00%


Total83100.00%10100.00%






static void i9xx_submit_request(struct i915_request *request)
{
	struct drm_i915_private *dev_priv = request->i915;

	i915_request_submit(request);

	I915_WRITE_TAIL(request->engine,
			intel_ring_set_tail(request->ring, request->tail));
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson2762.79%650.00%


Ben Widawsky920.93%216.67%


Eric Anholt36.98%18.33%


Tvrtko A. Ursulin24.65%18.33%


John Harrison12.33%18.33%


Zou Nan hai12.33%18.33%


Total43100.00%12100.00%






static void i9xx_emit_breadcrumb(struct i915_request *rq, u32 *cs)
{
	*cs++ = MI_STORE_DWORD_INDEX;
	*cs++ = I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT;
	*cs++ = rq->global_seqno;
	*cs++ = MI_USER_INTERRUPT;

	rq->tail = intel_ring_offset(rq, cs);
	assert_ring_tail_valid(rq->ring, rq->tail);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson5686.15%1178.57%


Tvrtko A. Ursulin69.23%17.14%


Zhenyu Wang23.08%17.14%


Ben Widawsky11.54%17.14%


Total65100.00%14100.00%




static const int i9xx_emit_breadcrumb_sz = 4;




static void gen6_sema_emit_breadcrumb(struct i915_request *rq, u32 *cs)
{
	return i9xx_emit_breadcrumb(rq, rq->engine->semaphore.signal(rq, cs));
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson3294.12%480.00%


Tvrtko A. Ursulin25.88%120.00%


Total34100.00%5100.00%





static int

gen6_ring_sync_to(struct i915_request *rq, struct i915_request *signal)
{
	u32 dw1 = MI_SEMAPHORE_MBOX |
		  MI_SEMAPHORE_COMPARE |
		  MI_SEMAPHORE_REGISTER;
	u32 wait_mbox = signal->engine->semaphore.mbox.wait[rq->engine->hw_id];
	u32 *cs;

	WARN_ON(wait_mbox == MI_SEMAPHORE_SYNC_INVALID);

	cs = intel_ring_begin(rq, 4);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	*cs++ = dw1 | wait_mbox;
	/* Throughout all of the GEM code, seqno passed implies our current
         * seqno is >= the last seqno executed. However for hardware the
         * comparison is strictly greater than.
         */
	*cs++ = signal->global_seqno - 1;
	*cs++ = 0;
	*cs++ = MI_NOOP;
	intel_ring_advance(rq, cs);

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson11193.28%787.50%


Tvrtko A. Ursulin86.72%112.50%


Total119100.00%8100.00%





static void

gen5_seqno_barrier(struct intel_engine_cs *engine)
{
	/* MI_STORE are internally buffered by the GPU and not flushed
         * either by MI_FLUSH or SyncFlush or any other combination of
         * MI commands.
         *
         * "Only the submission of the store operation is guaranteed.
         * The write result will be complete (coherent) some time later
         * (this is practically a finite period but there is no guaranteed
         * latency)."
         *
         * Empirically, we observe that we need a delay of at least 75us to
         * be sure that the seqno write is visible by the CPU.
         */
	usleep_range(125, 250);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson19100.00%4100.00%


Total19100.00%4100.00%





static void

gen6_seqno_barrier(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;

	/* Workaround to force correct ordering between irq and seqno writes on
         * ivb (and maybe also on snb) by reading from a CS register (like
         * ACTHD) before reading the status page.
         *
         * Note that this effectively stalls the read by the time it takes to
         * do a memory transaction, which more or less ensures that the write
         * from the GPU has sufficient time to invalidate the CPU cacheline.
         * Alternatively we could delay the interrupt from the CS ring to give
         * the write time to land, but that would incur a delay after every
         * batch i.e. much more frequent than a delay when waiting for the
         * interrupt (with the same net latency).
         *
         * Also note that to prevent whole machine hangs on gen7, we have to
         * take the spinlock to guard against concurrent cacheline access.
         */
	spin_lock_irq(&dev_priv->uncore.lock);
	POSTING_READ_FW(RING_ACTHD(engine->mmio_base));
	spin_unlock_irq(&dev_priv->uncore.lock);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson2854.90%450.00%


Ben Widawsky2039.22%225.00%


Tvrtko A. Ursulin35.88%225.00%


Total51100.00%8100.00%





static void

gen5_irq_enable(struct intel_engine_cs *engine)
{
	gen5_enable_gt_irq(engine->i915, engine->irq_enable_mask);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson2195.45%266.67%


Ben Widawsky14.55%133.33%


Total22100.00%3100.00%





static void

gen5_irq_disable(struct intel_engine_cs *engine)
{
	gen5_disable_gt_irq(engine->i915, engine->irq_enable_mask);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson1150.00%444.44%


Daniel Vetter522.73%111.11%


Tvrtko A. Ursulin29.09%111.11%


Eric Anholt29.09%111.11%


Ben Widawsky14.55%111.11%


Paulo Zanoni14.55%111.11%


Total22100.00%9100.00%





static void

i9xx_irq_enable(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;

	dev_priv->irq_mask &= ~engine->irq_enable_mask;
	I915_WRITE(IMR, dev_priv->irq_mask);
	POSTING_READ_FW(RING_IMR(engine->mmio_base));
}


Contributors
PersonTokensPropCommitsCommitProp
Daniel Vetter3164.58%327.27%


Chris Wilson1020.83%327.27%


Eric Anholt24.17%19.09%


Tvrtko A. Ursulin24.17%19.09%


Jani Nikula12.08%19.09%


Zou Nan hai12.08%19.09%


Oscar Mateo12.08%19.09%


Total48100.00%11100.00%





static void

i9xx_irq_disable(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;

	dev_priv->irq_mask |= engine->irq_enable_mask;
	I915_WRITE(IMR, dev_priv->irq_mask);
}


Contributors
PersonTokensPropCommitsCommitProp
Daniel Vetter2875.68%330.00%


Chris Wilson38.11%220.00%


Tvrtko A. Ursulin25.41%110.00%


Oscar Mateo12.70%110.00%


Zou Nan hai12.70%110.00%


Jani Nikula12.70%110.00%


Eric Anholt12.70%110.00%


Total37100.00%10100.00%





static void

i8xx_irq_enable(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;

	dev_priv->irq_mask &= ~engine->irq_enable_mask;
	I915_WRITE16(IMR, dev_priv->irq_mask);
	POSTING_READ16(RING_IMR(engine->mmio_base));
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson4491.67%350.00%


Tvrtko A. Ursulin24.17%116.67%


Jani Nikula12.08%116.67%


Oscar Mateo12.08%116.67%


Total48100.00%6100.00%





static void

i8xx_irq_disable(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;

	dev_priv->irq_mask |= engine->irq_enable_mask;
	I915_WRITE16(IMR, dev_priv->irq_mask);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson3389.19%350.00%


Tvrtko A. Ursulin25.41%116.67%


Jani Nikula12.70%116.67%


Oscar Mateo12.70%116.67%


Total37100.00%6100.00%





static int

bsd_ring_flush(struct i915_request *rq, u32 mode)
{
	u32 *cs;

	cs = intel_ring_begin(rq, 2);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	*cs++ = MI_FLUSH;
	*cs++ = MI_NOOP;
	intel_ring_advance(rq, cs);
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Tvrtko A. Ursulin2133.87%110.00%


Zou Nan hai2133.87%220.00%


Chris Wilson1829.03%660.00%


John Harrison23.23%110.00%


Total62100.00%10100.00%





static void

gen6_irq_enable(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;

	I915_WRITE_IMR(engine,
		       ~(engine->irq_enable_mask |
			 engine->irq_keep_mask));
	gen5_enable_gt_irq(dev_priv, engine->irq_enable_mask);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson2453.33%538.46%


Ben Widawsky817.78%17.69%


Tvrtko A. Ursulin511.11%17.69%


Daniel Vetter36.67%215.38%


Paulo Zanoni24.44%17.69%


Oscar Mateo12.22%17.69%


Zou Nan hai12.22%17.69%


Jani Nikula12.22%17.69%


Total45100.00%13100.00%





static void

gen6_irq_disable(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;

	I915_WRITE_IMR(engine, ~engine->irq_keep_mask);
	gen5_disable_gt_irq(dev_priv, engine->irq_enable_mask);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson2461.54%541.67%


Ben Widawsky410.26%18.33%


Tvrtko A. Ursulin410.26%18.33%


Daniel Vetter37.69%216.67%


Paulo Zanoni25.13%18.33%


Jani Nikula12.56%18.33%


Oscar Mateo12.56%18.33%


Total39100.00%12100.00%





static void

hsw_vebox_irq_enable(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;

	I915_WRITE_IMR(engine, ~engine->irq_enable_mask);
	gen6_unmask_pm_irq(dev_priv, engine->irq_enable_mask);
}


Contributors
PersonTokensPropCommitsCommitProp
Ben Widawsky2769.23%112.50%


Chris Wilson512.82%337.50%


Tvrtko A. Ursulin410.26%112.50%


Paulo Zanoni12.56%112.50%


Akash Goel12.56%112.50%


Oscar Mateo12.56%112.50%


Total39100.00%8100.00%





static void

hsw_vebox_irq_disable(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;

	I915_WRITE_IMR(engine, ~0);
	gen6_mask_pm_irq(dev_priv, engine->irq_enable_mask);
}


Contributors
PersonTokensPropCommitsCommitProp
Ben Widawsky2875.68%114.29%


Tvrtko A. Ursulin38.11%114.29%


Chris Wilson38.11%228.57%


Oscar Mateo12.70%114.29%


Akash Goel12.70%114.29%


Paulo Zanoni12.70%114.29%


Total37100.00%7100.00%





static int

i965_emit_bb_start(struct i915_request *rq,
		   u64 offset, u32 length,
		   unsigned int dispatch_flags)
{
	u32 *cs;

	cs = intel_ring_begin(rq, 2);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	*cs++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT | (dispatch_flags &
		I915_DISPATCH_SECURE ? 0 : MI_BATCH_NON_SECURE_I965);
	*cs++ = offset;
	intel_ring_advance(rq, cs);

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson3441.98%654.55%


Zou Nan hai1923.46%19.09%


Tvrtko A. Ursulin1822.22%19.09%


Ben Widawsky911.11%218.18%


John Harrison11.23%19.09%


Total81100.00%11100.00%



/* 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_emit_bb_start(struct i915_request *rq,
		   u64 offset, u32 len,
		   unsigned int dispatch_flags)
{
	u32 *cs, cs_offset = i915_ggtt_offset(rq->engine->scratch);

	cs = intel_ring_begin(rq, 6);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	/* Evict the invalid PTE TLBs */
	*cs++ = COLOR_BLT_CMD | BLT_WRITE_RGBA;
	*cs++ = BLT_DEPTH_32 | BLT_ROP_COLOR_COPY | 4096;
	*cs++ = I830_TLB_ENTRIES << 16 | 4; /* load each page */
	*cs++ = cs_offset;
	*cs++ = 0xdeadbeef;
	*cs++ = MI_NOOP;
	intel_ring_advance(rq, cs);

	if ((dispatch_flags & I915_DISPATCH_PINNED) == 0) {
		if (len > I830_BATCH_LIMIT)
			return -ENOSPC;

		cs = intel_ring_begin(rq, 6 + 2);
		if (IS_ERR(cs))
			return PTR_ERR(cs);

		/* Blit the batch (which has now all relocs applied) to the
                 * stable batch scratch bo area (so that the CS never
                 * stumbles over its tlb invalidation bug) ...
                 */
		*cs++ = SRC_COPY_BLT_CMD | BLT_WRITE_RGBA;
		*cs++ = BLT_DEPTH_32 | BLT_ROP_SRC_COPY | 4096;
		*cs++ = DIV_ROUND_UP(len, 4096) << 16 | 4096;
		*cs++ = cs_offset;
		*cs++ = 4096;
		*cs++ = offset;

		*cs++ = MI_FLUSH;
		*cs++ = MI_NOOP;
		intel_ring_advance(rq, cs);

		/* ... and execute it. */
		offset = cs_offset;
	}

	cs = intel_ring_begin(rq, 2);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	*cs++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT;
	*cs++ = offset | (dispatch_flags & I915_DISPATCH_SECURE ? 0 :
		MI_BATCH_NON_SECURE);
	intel_ring_advance(rq, cs);

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Tvrtko A. Ursulin10134.71%211.11%


Chris Wilson9030.93%950.00%


Daniel Vetter7224.74%211.11%


Zou Nan hai113.78%15.56%


Eric Anholt93.09%15.56%


Ville Syrjälä41.37%15.56%


John Harrison31.03%15.56%


Ben Widawsky10.34%15.56%


Total291100.00%18100.00%





static int

i915_emit_bb_start(struct i915_request *rq,
		   u64 offset, u32 len,
		   unsigned int dispatch_flags)
{
	u32 *cs;

	cs = intel_ring_begin(rq, 2);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	*cs++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT;
	*cs++ = offset | (dispatch_flags & I915_DISPATCH_SECURE ? 0 :
		MI_BATCH_NON_SECURE);
	intel_ring_advance(rq, cs);

	return 0;
}




Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson2125.93%750.00%


Tvrtko A. Ursulin2125.93%17.14%


Zou Nan hai1518.52%17.14%


Daniel Vetter1113.58%17.14%


Eric Anholt89.88%17.14%


John Harrison44.94%214.29%


Ben Widawsky11.23%17.14%


Total81100.00%14100.00%






int intel_ring_pin(struct intel_ring *ring,
		   struct drm_i915_private *i915,
		   unsigned int offset_bias)
{
	enum i915_map_type map = HAS_LLC(i915) ? I915_MAP_WB : I915_MAP_WC;
	struct i915_vma *vma = ring->vma;
	unsigned int flags;
	void *addr;
	int ret;

	GEM_BUG_ON(ring->vaddr);


	flags = PIN_GLOBAL;
	if (offset_bias)
		flags |= PIN_OFFSET_BIAS | offset_bias;
	if (vma->obj->stolen)
		flags |= PIN_MAPPABLE;

	if (!(vma->flags & I915_VMA_GLOBAL_BIND)) {
		if (flags & PIN_MAPPABLE || map == I915_MAP_WC)
			ret = i915_gem_object_set_to_gtt_domain(vma->obj, true);
		else
			ret = i915_gem_object_set_to_cpu_domain(vma->obj, true);
		if (unlikely(ret))
			return ret;
	}

	ret = i915_vma_pin(vma, 0, PAGE_SIZE, flags);
	if (unlikely(ret))
		return ret;

	if (i915_vma_is_map_and_fenceable(vma))
		addr = (void __force *)i915_vma_pin_iomap(vma);
	else
		addr = i915_gem_object_pin_map(vma->obj, map);
	if (IS_ERR(addr))
		goto err;

	vma->obj->pin_global++;

	ring->vaddr = addr;
	return 0;

err:
	i915_vma_unpin(vma);
	return PTR_ERR(addr);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson18679.49%1976.00%


Daniele Ceraolo Spurio187.69%14.00%


Dave Gordon114.70%14.00%


Zou Nan hai93.85%14.00%


Thomas Daniel62.56%14.00%


Eric Anholt31.28%14.00%


Tvrtko A. Ursulin10.43%14.00%


Total234100.00%25100.00%






void intel_ring_reset(struct intel_ring *ring, u32 tail)
{
	GEM_BUG_ON(!list_empty(&ring->request_list));
	ring->tail = tail;
	ring->head = tail;
	ring->emit = tail;
	intel_ring_update_space(ring);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson48100.00%1100.00%


Total48100.00%1100.00%






void intel_ring_unpin(struct intel_ring *ring)
{
	GEM_BUG_ON(!ring->vma);
	GEM_BUG_ON(!ring->vaddr);

	/* Discard any unused bytes beyond that submitted to hw. */
	intel_ring_reset(ring, ring->tail);

	if (i915_vma_is_map_and_fenceable(ring->vma))
		i915_vma_unpin_iomap(ring->vma);
	else
		i915_gem_object_unpin_map(ring->vma->obj);
	ring->vaddr = NULL;

	ring->vma->obj->pin_global--;
	i915_vma_unpin(ring->vma);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson84100.00%5100.00%


Total84100.00%5100.00%





static struct i915_vma *

intel_ring_create_vma(struct drm_i915_private *dev_priv, int size)
{
	struct drm_i915_gem_object *obj;
	struct i915_vma *vma;

	obj = i915_gem_object_create_stolen(dev_priv, size);
	if (!obj)
		obj = i915_gem_object_create_internal(dev_priv, size);
	if (IS_ERR(obj))
		return ERR_CAST(obj);

	/* mark ring buffers as read-only from GPU side by default */
	obj->gt_ro = 1;

	vma = i915_vma_instance(obj, &dev_priv->ggtt.base, NULL);
	if (IS_ERR(vma))
		goto err;

	return vma;

err:
	i915_gem_object_put(obj);
	return vma;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson6762.04%777.78%


Thomas Daniel4037.04%111.11%


Zou Nan hai10.93%111.11%


Total108100.00%9100.00%





struct intel_ring *

intel_engine_create_ring(struct intel_engine_cs *engine, int size)
{
	struct intel_ring *ring;
	struct i915_vma *vma;

	GEM_BUG_ON(!is_power_of_2(size));
	GEM_BUG_ON(RING_CTL_SIZE(size) & ~RING_NR_PAGES);

	ring = kzalloc(sizeof(*ring), GFP_KERNEL);
	if (!ring)
		return ERR_PTR(-ENOMEM);

	INIT_LIST_HEAD(&ring->request_list);

	ring->size = size;
	/* Workaround an erratum on the i830 which causes a hang if
         * the TAIL pointer points to within the last 2 cachelines
         * of the buffer.
         */
	ring->effective_size = size;
	if (IS_I830(engine->i915) || IS_I845G(engine->i915))
		ring->effective_size -= 2 * CACHELINE_BYTES;

	intel_ring_update_space(ring);

	vma = intel_ring_create_vma(engine->i915, size);
	if (IS_ERR(vma)) {
		kfree(ring);
		return ERR_CAST(vma);
	}
	ring->vma = vma;

	return ring;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson13584.38%969.23%


Oscar Mateo2314.38%215.38%


Daniel Vetter10.62%17.69%


Jani Nikula10.62%17.69%


Total160100.00%13100.00%





void

intel_ring_free(struct intel_ring *ring)
{
	struct drm_i915_gem_object *obj = ring->vma->obj;

	i915_vma_close(ring->vma);
	__i915_gem_object_release_unless_active(obj);

	kfree(ring);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson38100.00%4100.00%


Total38100.00%4100.00%






static int context_pin(struct i915_gem_context *ctx)
{
	struct i915_vma *vma = ctx->engine[RCS].state;
	int ret;

	/*
         * Clear this page out of any CPU caches for coherent swap-in/out.
         * We only want to do this on the first bind so that we do not stall
         * on an active context (which by nature is already on the GPU).
         */
	if (!(vma->flags & I915_VMA_GLOBAL_BIND)) {
		ret = i915_gem_object_set_to_gtt_domain(vma->obj, true);
		if (ret)
			return ret;
	}

	return i915_vma_pin(vma, 0, I915_GTT_MIN_ALIGNMENT,
			    PIN_GLOBAL | PIN_HIGH);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson74100.00%5100.00%


Total74100.00%5100.00%





static struct i915_vma *

alloc_context_vma(struct intel_engine_cs *engine)
{
	struct drm_i915_private *i915 = engine->i915;
	struct drm_i915_gem_object *obj;
	struct i915_vma *vma;
	int err;

	obj = i915_gem_object_create(i915, engine->context_size);
	if (IS_ERR(obj))
		return ERR_CAST(obj);

	if (engine->default_state) {
		void *defaults, *vaddr;

		vaddr = i915_gem_object_pin_map(obj, I915_MAP_WB);
		if (IS_ERR(vaddr)) {
			err = PTR_ERR(vaddr);
			goto err_obj;
		}

		defaults = i915_gem_object_pin_map(engine->default_state,
						   I915_MAP_WB);
		if (IS_ERR(defaults)) {
			err = PTR_ERR(defaults);
			goto err_map;
		}

		memcpy(vaddr, defaults, engine->context_size);

		i915_gem_object_unpin_map(engine->default_state);
		i915_gem_object_unpin_map(obj);
	}

	/*
         * Try to make the context utilize L3 as well as LLC.
         *
         * On VLV we don't have L3 controls in the PTEs so we
         * shouldn't touch the cache level, especially as that
         * would make the object snooped which might have a
         * negative performance impact.
         *
         * Snooping is required on non-llc platforms in execlist
         * mode, but since all GGTT accesses use PAT entry 0 we
         * get snooping anyway regardless of cache_level.
         *
         * This is only applicable for Ivy Bridge devices since
         * later platforms don't have L3 control bits in the PTE.
         */
	if (IS_IVYBRIDGE(i915)) {
		/* Ignore any error, regard it as a simple optimisation */
		i915_gem_object_set_cache_level(obj, I915_CACHE_L3_LLC);
	}

	vma = i915_vma_instance(obj, &i915->ggtt.base, NULL);
	if (IS_ERR(vma)) {
		err = PTR_ERR(vma);
		goto err_obj;
	}

	return vma;

err_map:
	i915_gem_object_unpin_map(obj);
err_obj:
	i915_gem_object_put(obj);
	return ERR_PTR(err);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson22999.13%266.67%


Joonas Lahtinen20.87%133.33%


Total231100.00%3100.00%





static struct intel_ring *

intel_ring_context_pin(struct intel_engine_cs *engine,
		       struct i915_gem_context *ctx)
{
	struct intel_context *ce = &ctx->engine[engine->id];
	int ret;

	lockdep_assert_held(&ctx->i915->drm.struct_mutex);

	if (likely(ce->pin_count++))
		goto out;
	GEM_BUG_ON(!ce->pin_count); /* no overflow please! */

	if (!ce->state && engine->context_size) {
		struct i915_vma *vma;

		vma = alloc_context_vma(engine);
		if (IS_ERR(vma)) {
			ret = PTR_ERR(vma);
			goto err;
		}

		ce->state = vma;
	}

	if (ce->state) {
		ret = context_pin(ctx);
		if (ret)
			goto err;

		ce->state->obj->pin_global++;
	}

	i915_gem_context_get(ctx);

out:
	/* One ringbuffer to rule them all */
	return engine->buffer;

err:
	ce->pin_count = 0;
	return ERR_PTR(ret);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson17799.44%1090.91%


Joonas Lahtinen10.56%19.09%


Total178100.00%11100.00%






static void intel_ring_context_unpin(struct intel_engine_cs *engine,
				     struct i915_gem_context *ctx)
{
	struct intel_context *ce = &ctx->engine[engine->id];

	lockdep_assert_held(&ctx->i915->drm.struct_mutex);
	GEM_BUG_ON(ce->pin_count == 0);

	if (--ce->pin_count)
		return;

	if (ce->state) {
		ce->state->obj->pin_global--;
		i915_vma_unpin(ce->state);
	}

	i915_gem_context_put(ctx);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson89100.00%6100.00%


Total89100.00%6100.00%






static int intel_init_ring_buffer(struct intel_engine_cs *engine)
{
	struct intel_ring *ring;
	int err;

	intel_engine_setup_common(engine);

	err = intel_engine_init_common(engine);
	if (err)
		goto err;

	ring = intel_engine_create_ring(engine, 32 * PAGE_SIZE);
	if (IS_ERR(ring)) {
		err = PTR_ERR(ring);
		goto err;
	}

	/* Ring wraparound at offset 0 sometimes hangs. No idea why. */
	err = intel_ring_pin(ring, engine->i915, I915_GTT_PAGE_SIZE);
	if (err)
		goto err_ring;

	GEM_BUG_ON(engine->buffer);
	engine->buffer = ring;

	return 0;

err_ring:
	intel_ring_free(ring);
err:
	intel_engine_cleanup_common(engine);
	return err;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson9073.77%1155.00%


Thomas Daniel108.20%15.00%


Oscar Mateo75.74%15.00%


Tvrtko A. Ursulin64.92%210.00%


Zou Nan hai32.46%15.00%


Daniele Ceraolo Spurio32.46%210.00%


Eric Anholt21.64%15.00%


Dave Gordon10.82%15.00%


Total122100.00%20100.00%






void intel_engine_cleanup(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;

	WARN_ON(INTEL_GEN(dev_priv) > 2 &&
		(I915_READ_MODE(engine) & MODE_IDLE) == 0);

	intel_ring_unpin(engine->buffer);
	intel_ring_free(engine->buffer);

	if (engine->cleanup)
		engine->cleanup(engine);

	intel_engine_cleanup_common(engine);

	dev_priv->engine[engine->id] = NULL;
	kfree(engine);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson3539.77%1152.38%


Akash Goel1618.18%14.76%


Zou Nan hai1112.50%29.52%


Eric Anholt910.23%14.76%


Tvrtko A. Ursulin89.09%14.76%


Thomas Daniel33.41%14.76%


Ville Syrjälä33.41%14.76%


John Harrison11.14%14.76%


Oscar Mateo11.14%14.76%


Ben Widawsky11.14%14.76%


Total88100.00%21100.00%






void intel_legacy_submission_resume(struct drm_i915_private *dev_priv)
{
	struct intel_engine_cs *engine;
	enum intel_engine_id id;

	/* Restart from the beginning of the rings for convenience */
	for_each_engine(engine, dev_priv, id)
		intel_ring_reset(engine->buffer, 0);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson3183.78%266.67%


Akash Goel616.22%133.33%


Total37100.00%3100.00%






static inline int mi_set_context(struct i915_request *rq, u32 flags)
{
	struct drm_i915_private *i915 = rq->i915;
	struct intel_engine_cs *engine = rq->engine;
	enum intel_engine_id id;
	const int num_rings =
		/* Use an extended w/a on gen7 if signalling from other rings */
		(HAS_LEGACY_SEMAPHORES(i915) && IS_GEN7(i915)) ?
		INTEL_INFO(i915)->num_rings - 1 :
		0;
	int len;
	u32 *cs;

	flags |= MI_MM_SPACE_GTT;
	if (IS_HASWELL(i915))
		/* These flags are for resource streamer on HSW+ */
		flags |= HSW_MI_RS_SAVE_STATE_EN | HSW_MI_RS_RESTORE_STATE_EN;
	else
		flags |= MI_SAVE_EXT_STATE_EN | MI_RESTORE_EXT_STATE_EN;

	len = 4;
	if (IS_GEN7(i915))
		len += 2 + (num_rings ? 4*num_rings + 6 : 0);

	cs = intel_ring_begin(rq, len);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	/* WaProgramMiArbOnOffAroundMiSetContext:ivb,vlv,hsw,bdw,chv */
	if (IS_GEN7(i915)) {
		*cs++ = MI_ARB_ON_OFF | MI_ARB_DISABLE;
		if (num_rings) {
			struct intel_engine_cs *signaller;

			*cs++ = MI_LOAD_REGISTER_IMM(num_rings);
			for_each_engine(signaller, i915, id) {
				if (signaller == engine)
					continue;

				*cs++ = i915_mmio_reg_offset(
					   RING_PSMI_CTL(signaller->mmio_base));
				*cs++ = _MASKED_BIT_ENABLE(
						GEN6_PSMI_SLEEP_MSG_DISABLE);
			}
		}
	}

	*cs++ = MI_NOOP;
	*cs++ = MI_SET_CONTEXT;
	*cs++ = i915_ggtt_offset(rq->ctx->engine[RCS].state) | flags;
	/*
         * w/a: MI_SET_CONTEXT must always be followed by MI_NOOP
         * WaMiSetContext_Hang:snb,ivb,vlv
         */
	*cs++ = MI_NOOP;

	if (IS_GEN7(i915)) {
		if (num_rings) {
			struct intel_engine_cs *signaller;
			i915_reg_t last_reg = {}; /* keep gcc quiet */

			*cs++ = MI_LOAD_REGISTER_IMM(num_rings);
			for_each_engine(signaller, i915, id) {
				if (signaller == engine)
					continue;

				last_reg = RING_PSMI_CTL(signaller->mmio_base);
				*cs++ = i915_mmio_reg_offset(last_reg);
				*cs++ = _MASKED_BIT_DISABLE(
						GEN6_PSMI_SLEEP_MSG_DISABLE);
			}

			/* Insert a delay before the next switch! */
			*cs++ = MI_STORE_REGISTER_MEM | MI_SRM_LRM_GLOBAL_GTT;
			*cs++ = i915_mmio_reg_offset(last_reg);
			*cs++ = i915_ggtt_offset(engine->scratch);
			*cs++ = MI_NOOP;
		}
		*cs++ = MI_ARB_ON_OFF | MI_ARB_ENABLE;
	}

	intel_ring_advance(rq, cs);

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson395100.00%2100.00%


Total395100.00%2100.00%






static int remap_l3(struct i915_request *rq, int slice)
{
	u32 *cs, *remap_info = rq->i915->l3_parity.remap_info[slice];
	int i;

	if (!remap_info)
		return 0;

	cs = intel_ring_begin(rq, GEN7_L3LOG_SIZE/4 * 2 + 2);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	/*
         * Note: We do not worry about the concurrent register cacheline hang
         * here because no other code should access these registers other than
         * at initialization time.
         */
	*cs++ = MI_LOAD_REGISTER_IMM(GEN7_L3LOG_SIZE/4);
	for (i = 0; i < GEN7_L3LOG_SIZE/4; i++) {
		*cs++ = i915_mmio_reg_offset(GEN7_L3LOG(slice, i));
		*cs++ = remap_info[i];
	}
	*cs++ = MI_NOOP;
	intel_ring_advance(rq, cs);

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson139100.00%2100.00%


Total139100.00%2100.00%






static int switch_context(struct i915_request *rq)
{
	struct intel_engine_cs *engine = rq->engine;
	struct i915_gem_context *to_ctx = rq->ctx;
	struct i915_hw_ppgtt *to_mm =
		to_ctx->ppgtt ?: rq->i915->mm.aliasing_ppgtt;
	struct i915_gem_context *from_ctx = engine->legacy_active_context;
	struct i915_hw_ppgtt *from_mm = engine->legacy_active_ppgtt;
	u32 hw_flags = 0;
	int ret, i;

	lockdep_assert_held(&rq->i915->drm.struct_mutex);
	GEM_BUG_ON(HAS_EXECLISTS(rq->i915));

	if (to_mm != from_mm ||
	    (to_mm && intel_engine_flag(engine) & to_mm->pd_dirty_rings)) {
		trace_switch_mm(engine, to_ctx);
		ret = to_mm->switch_mm(to_mm, rq);
		if (ret)
			goto err;

		to_mm->pd_dirty_rings &= ~intel_engine_flag(engine);
		engine->legacy_active_ppgtt = to_mm;
		hw_flags = MI_FORCE_RESTORE;
	}

	if (to_ctx->engine[engine->id].state &&
	    (to_ctx != from_ctx || hw_flags & MI_FORCE_RESTORE)) {
		GEM_BUG_ON(engine->id != RCS);

		/*
                 * The kernel context(s) is treated as pure scratch and is not
                 * expected to retain any state (as we sacrifice it during
                 * suspend and on resume it may be corrupted). This is ok,
                 * as nothing actually executes using the kernel context; it
                 * is purely used for flushing user contexts.
                 */
		if (i915_gem_context_is_kernel(to_ctx))
			hw_flags = MI_RESTORE_INHIBIT;

		ret = mi_set_context(rq, hw_flags);
		if (ret)
			goto err_mm;

		engine->legacy_active_context = to_ctx;
	}

	if (to_ctx->remap_slice) {
		for (i = 0; i < MAX_L3_SLICES; i++) {
			if (!(to_ctx->remap_slice & BIT(i)))
				continue;

			ret = remap_l3(rq, i);
			if (ret)
				goto err_ctx;
		}

		to_ctx->remap_slice = 0;
	}

	return 0;

err_ctx:
	engine->legacy_active_context = from_ctx;
err_mm:
	engine->legacy_active_ppgtt = from_mm;
err:
	return ret;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson315100.00%2100.00%


Total315100.00%2100.00%






static int ring_request_alloc(struct i915_request *request)
{
	int ret;

	GEM_BUG_ON(!request->ctx->engine[request->engine->id].pin_count);

	/* Flush enough space to reduce the likelihood of waiting after
         * we start building the request - in which case we will just
         * have to repeat work.
         */
	request->reserved_space += LEGACY_REQUEST_SIZE;

	ret = intel_ring_wait_for_space(request->ring, request->reserved_space);
	if (ret)
		return ret;

	ret = switch_context(request);
	if (ret)
		return ret;

	request->reserved_space -= LEGACY_REQUEST_SIZE;
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson7995.18%1083.33%


John Harrison44.82%216.67%


Total83100.00%12100.00%






static noinline int wait_for_space(struct intel_ring *ring, unsigned int bytes)
{
	struct i915_request *target;
	long timeout;

	lockdep_assert_held(&ring->vma->vm->i915->drm.struct_mutex);

	if (intel_ring_update_space(ring) >= bytes)
		return 0;

	list_for_each_entry(target, &ring->request_list, ring_link) {
		/* Would completion of this request free enough space? */
		if (bytes <= __intel_ring_space(target->postfix,
						ring->emit, ring->size))
			break;
	}

	if (WARN_ON(&target->ring_link == &ring->request_list))
		return -ENOSPC;

	timeout = i915_request_wait(target,
				    I915_WAIT_INTERRUPTIBLE | I915_WAIT_LOCKED,
				    MAX_SCHEDULE_TIMEOUT);
	if (timeout < 0)
		return timeout;

	i915_request_retire_upto(target);

	intel_ring_update_space(ring);
	GEM_BUG_ON(ring->space < bytes);
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson14397.95%1386.67%


John Harrison32.05%213.33%


Total146100.00%15100.00%






int intel_ring_wait_for_space(struct intel_ring *ring, unsigned int bytes)
{
	GEM_BUG_ON(bytes > ring->effective_size);
	if (unlikely(bytes > ring->effective_size - ring->emit))
		bytes += ring->size - ring->emit;

	if (unlikely(bytes > ring->space)) {
		int ret = wait_for_space(ring, bytes);
		if (unlikely(ret))
			return ret;
	}

	GEM_BUG_ON(ring->space < bytes);
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson93100.00%1100.00%


Total93100.00%1100.00%






u32 *intel_ring_begin(struct i915_request *rq, unsigned int num_dwords)
{
	struct intel_ring *ring = rq->ring;
	const unsigned int remain_usable = ring->effective_size - ring->emit;
	const unsigned int bytes = num_dwords * sizeof(u32);
	unsigned int need_wrap = 0;
	unsigned int total_bytes;
	u32 *cs;

	/* Packets must be qword aligned. */
	GEM_BUG_ON(num_dwords & 1);

	total_bytes = bytes + rq->reserved_space;
	GEM_BUG_ON(total_bytes > ring->effective_size);

	if (unlikely(total_bytes > remain_usable)) {
		const int remain_actual = ring->size - ring->emit;

		if (bytes > remain_usable) {
			/*
                         * Not enough space for the basic request. So need to
                         * flush out the remainder and then wait for
                         * base + reserved.
                         */
			total_bytes += remain_actual;
			need_wrap = remain_actual | 1;
		} else  {
			/*
                         * The base request will fit but the reserved space
                         * falls off the end. So we don't need an immediate
                         * wrap and only need to effectively wait for the
                         * reserved size from the start of ringbuffer.
                         */
			total_bytes = rq->reserved_space + remain_actual;
		}
	}

	if (unlikely(total_bytes > ring->space)) {
		int ret;

		/*
                 * Space is reserved in the ringbuffer for finalising the
                 * request, as that cannot be allowed to fail. During request
                 * finalisation, reserved_space is set to 0 to stop the
                 * overallocation and the assumption is that then we never need
                 * to wait (which has the risk of failing with EINTR).
                 *
                 * See also i915_request_alloc() and i915_request_add().
                 */
		GEM_BUG_ON(!rq->reserved_space);

		ret = wait_for_space(ring, total_bytes);
		if (unlikely(ret))
			return ERR_PTR(ret);
	}

	if (unlikely(need_wrap)) {
		need_wrap &= ~1;
		GEM_BUG_ON(need_wrap > ring->space);
		GEM_BUG_ON(ring->emit + need_wrap > ring->size);

		/* Fill the tail with MI_NOOP */
		memset(ring->vaddr + ring->emit, 0, need_wrap);
		ring->emit = 0;
		ring->space -= need_wrap;
	}

	GEM_BUG_ON(ring->emit > ring->size - bytes);
	GEM_BUG_ON(ring->space < bytes);
	cs = ring->vaddr + ring->emit;
	GEM_DEBUG_EXEC(memset(cs, POISON_INUSE, bytes));
	ring->emit += bytes;
	ring->space -= bytes;

	return cs;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson21468.59%1565.22%


John Harrison3711.86%28.70%


Tvrtko A. Ursulin3711.86%28.70%


Zou Nan hai165.13%14.35%


Oscar Mateo61.92%28.70%


Mika Kuoppala20.64%14.35%


Total312100.00%23100.00%



/* Align the ring tail to a cacheline boundary */



int intel_ring_cacheline_align(struct i915_request *rq)
{
	int num_dwords = (rq->ring->emit & (CACHELINE_BYTES - 1)) / sizeof(u32);
	u32 *cs;

	if (num_dwords == 0)
		return 0;

	num_dwords = CACHELINE_BYTES / sizeof(u32) - num_dwords;
	cs = intel_ring_begin(rq, num_dwords);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	while (num_dwords--)
		*cs++ = MI_NOOP;

	intel_ring_advance(rq, cs);

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Ville Syrjälä5656.57%114.29%


Chris Wilson2323.23%457.14%


Tvrtko A. Ursulin1919.19%114.29%


Oscar Mateo11.01%114.29%


Total99100.00%7100.00%






static void gen6_bsd_submit_request(struct i915_request *request)
{
	struct drm_i915_private *dev_priv = request->i915;

	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);

       /* Every tail move must follow the sequence below */

	/* Disable notification that the ring is IDLE. The GT
         * will then assume that it is busy and bring it out of rc6.
         */
	I915_WRITE_FW(GEN6_BSD_SLEEP_PSMI_CONTROL,
		      _MASKED_BIT_ENABLE(GEN6_BSD_SLEEP_MSG_DISABLE));

	/* Clear the context id. Here be magic! */
	I915_WRITE64_FW(GEN6_BSD_RNCID, 0x0);

	/* Wait for the ring not to be idle, i.e. for it to wake up. */
	if (__intel_wait_for_register_fw(dev_priv,
					 GEN6_BSD_SLEEP_PSMI_CONTROL,
					 GEN6_BSD_SLEEP_INDICATOR,
					 0,
					 1000, 0, NULL))
		DRM_ERROR("timed out waiting for the BSD ring to wake up\n");

	/* Now that the ring is fully powered up, update the tail */
	i9xx_submit_request(request);

	/* Let the ring send IDLE messages to the GT again,
         * and so let it sleep to conserve power when idle.
         */
	I915_WRITE_FW(GEN6_BSD_SLEEP_PSMI_CONTROL,
		      _MASKED_BIT_DISABLE(GEN6_BSD_SLEEP_MSG_DISABLE));

	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson5355.21%969.23%


Xiang, Haihao4041.67%215.38%


Jani Nikula22.08%17.69%


Daniel Vetter11.04%17.69%


Total96100.00%13100.00%






static int gen6_bsd_ring_flush(struct i915_request *rq, u32 mode)
{
	u32 cmd, *cs;

	cs = intel_ring_begin(rq, 4);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	cmd = MI_FLUSH_DW;

	/* We always require a command barrier so that subsequent
         * commands, such as breadcrumb interrupts, are strictly ordered
         * wrt the contents of the write cache being flushed to memory
         * (and thus being coherent from the CPU).
         */
	cmd |= MI_FLUSH_DW_STORE_INDEX | MI_FLUSH_DW_OP_STOREDW;

	/*
         * Bspec vol 1c.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 (mode & EMIT_INVALIDATE)
		cmd |= MI_INVALIDATE_TLB | MI_INVALIDATE_BSD;

	*cs++ = cmd;
	*cs++ = I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT;
	*cs++ = 0;
	*cs++ = MI_NOOP;
	intel_ring_advance(rq, cs);
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson3938.24%650.00%


Tvrtko A. Ursulin3130.39%18.33%


Xiang, Haihao1514.71%18.33%


Ben Widawsky1211.76%216.67%


Jesse Barnes43.92%18.33%


Abdiel Janulgue10.98%18.33%


Total102100.00%12100.00%





static int

hsw_emit_bb_start(struct i915_request *rq,
		  u64 offset, u32 len,
		  unsigned int dispatch_flags)
{
	u32 *cs;

	cs = intel_ring_begin(rq, 2);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	*cs++ = MI_BATCH_BUFFER_START | (dispatch_flags & I915_DISPATCH_SECURE ?
		0 : MI_BATCH_PPGTT_HSW | MI_BATCH_NON_SECURE_HSW) |
		(dispatch_flags & I915_DISPATCH_RS ?
		MI_BATCH_RESOURCE_STREAMER : 0);
	/* bit0-7 is the length on GEN6+ */
	*cs++ = offset;
	intel_ring_advance(rq, cs);

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson5458.70%440.00%


Tvrtko A. Ursulin2122.83%110.00%


Abdiel Janulgue1010.87%110.00%


John Harrison44.35%220.00%


Ben Widawsky33.26%220.00%


Total92100.00%10100.00%





static int

gen6_emit_bb_start(struct i915_request *rq,
		   u64 offset, u32 len,
		   unsigned int dispatch_flags)
{
	u32 *cs;

	cs = intel_ring_begin(rq, 2);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	*cs++ = MI_BATCH_BUFFER_START | (dispatch_flags & I915_DISPATCH_SECURE ?
		0 : MI_BATCH_NON_SECURE_I965);
	/* bit0-7 is the length on GEN6+ */
	*cs++ = offset;
	intel_ring_advance(rq, cs);

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson3645.00%654.55%


Tvrtko A. Ursulin2126.25%19.09%


Xiang, Haihao1923.75%19.09%


John Harrison33.75%218.18%


Ben Widawsky11.25%19.09%


Total80100.00%11100.00%



/* Blitter support (SandyBridge+) */




static int gen6_ring_flush(struct i915_request *rq, u32 mode)
{
	u32 cmd, *cs;

	cs = intel_ring_begin(rq, 4);
	if (IS_ERR(cs))
		return PTR_ERR(cs);

	cmd = MI_FLUSH_DW;

	/* We always require a command barrier so that subsequent
         * commands, such as breadcrumb interrupts, are strictly ordered
         * wrt the contents of the write cache being flushed to memory
         * (and thus being coherent from the CPU).
         */
	cmd |= MI_FLUSH_DW_STORE_INDEX | MI_FLUSH_DW_OP_STOREDW;

	/*
         * Bspec vol 1c.3 - blitter engine command streamer:
         * "If ENABLED, all TLBs will be invalidated once the flush
         * operation is complete. This bit is only valid when the
         * Post-Sync Operation field is a value of 1h or 3h."
         */
	if (mode & EMIT_INVALIDATE)
		cmd |= MI_INVALIDATE_TLB;
	*cs++ = cmd;
	*cs++ = I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT;
	*cs++ = 0;
	*cs++ = MI_NOOP;
	intel_ring_advance(rq, cs);

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson4242.00%650.00%


Tvrtko A. Ursulin3232.00%216.67%


Zou Nan hai2020.00%18.33%


Jesse Barnes44.00%18.33%


Ben Widawsky11.00%18.33%


Daniel Vetter11.00%18.33%


Total100100.00%12100.00%






static void intel_ring_init_semaphores(struct drm_i915_private *dev_priv,
				       struct intel_engine_cs *engine)
{
	int i;

	if (!HAS_LEGACY_SEMAPHORES(dev_priv))
		return;

	GEM_BUG_ON(INTEL_GEN(dev_priv) < 6);
	engine->semaphore.sync_to = gen6_ring_sync_to;
	engine->semaphore.signal = gen6_signal;

	/*
         * The current semaphore is only applied on pre-gen8
         * platform.  And there is no VCS2 ring on the pre-gen8
         * platform. So the semaphore between RCS and VCS2 is
         * initialized as INVALID.
         */
	for (i = 0; i < GEN6_NUM_SEMAPHORES; i++) {
		
static const struct {
			
u32 wait_mbox;
			
i915_reg_t mbox_reg;
		} sem_data[GEN6_NUM_SEMAPHORES][GEN6_NUM_SEMAPHORES] = {
			[RCS_HW] = {
				[VCS_HW] =  { .wait_mbox = MI_SEMAPHORE_SYNC_RV,  .mbox_reg = GEN6_VRSYNC },
				[BCS_HW] =  { .wait_mbox = MI_SEMAPHORE_SYNC_RB,  .mbox_reg = GEN6_BRSYNC },
				[VECS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_RVE, .mbox_reg = GEN6_VERSYNC },
                        },
			[VCS_HW] = {
				[RCS_HW] =  { .wait_mbox = MI_SEMAPHORE_SYNC_VR,  .mbox_reg = GEN6_RVSYNC },
				[BCS_HW] =  { .wait_mbox = MI_SEMAPHORE_SYNC_VB,  .mbox_reg = GEN6_BVSYNC },
				[VECS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_VVE, .mbox_reg = GEN6_VEVSYNC },
                        },
			[BCS_HW] = {
				[RCS_HW] =  { .wait_mbox = MI_SEMAPHORE_SYNC_BR,  .mbox_reg = GEN6_RBSYNC },
				[VCS_HW] =  { .wait_mbox = MI_SEMAPHORE_SYNC_BV,  .mbox_reg = GEN6_VBSYNC },
				[VECS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_BVE, .mbox_reg = GEN6_VEBSYNC },
                        },
			[VECS_HW] = {
				[RCS_HW] =  { .wait_mbox = MI_SEMAPHORE_SYNC_VER, .mbox_reg = GEN6_RVESYNC },
				[VCS_HW] =  { .wait_mbox = MI_SEMAPHORE_SYNC_VEV, .mbox_reg = GEN6_VVESYNC },
				[BCS_HW] =  { .wait_mbox = MI_SEMAPHORE_SYNC_VEB, .mbox_reg = GEN6_BVESYNC },
                        },
                };
		u32 wait_mbox;
		i915_reg_t mbox_reg;

		if (i == engine->hw_id) {
			wait_mbox = MI_SEMAPHORE_SYNC_INVALID;
			mbox_reg = GEN6_NOSYNC;
		} else {
			wait_mbox = sem_data[engine->hw_id][i].wait_mbox;
			mbox_reg = sem_data[engine->hw_id][i].mbox_reg;
		}

		engine->semaphore.mbox.wait[i] = wait_mbox;
		engine->semaphore.mbox.signal[i] = mbox_reg;
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Tvrtko A. Ursulin28272.68%1139.29%


Chris Wilson4010.31%621.43%


Ben Widawsky389.79%621.43%


Daniel Vetter184.64%27.14%


Yakui Zhao82.06%13.57%


Xiang, Haihao10.26%13.57%


Ville Syrjälä10.26%13.57%


Total388100.00%28100.00%






static void intel_ring_init_irq(struct drm_i915_private *dev_priv,
				struct intel_engine_cs *engine)
{
	engine->irq_enable_mask = GT_RENDER_USER_INTERRUPT << engine->irq_shift;

	if (INTEL_GEN(dev_priv) >= 6) {
		engine->irq_enable = gen6_irq_enable;
		engine->irq_disable = gen6_irq_disable;
		engine->irq_seqno_barrier = gen6_seqno_barrier;
	} else if (INTEL_GEN(dev_priv) >= 5) {
		engine->irq_enable = gen5_irq_enable;
		engine->irq_disable = gen5_irq_disable;
		engine->irq_seqno_barrier = gen5_seqno_barrier;
	} else if (INTEL_GEN(dev_priv) >= 3) {
		engine->irq_enable = i9xx_irq_enable;
		engine->irq_disable = i9xx_irq_disable;
	} else {
		engine->irq_enable = i8xx_irq_enable;
		engine->irq_disable = i8xx_irq_disable;
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson7762.10%857.14%


Tvrtko A. Ursulin3225.81%321.43%


Daniel Vetter1512.10%321.43%


Total124100.00%14100.00%






static void i9xx_set_default_submission(struct intel_engine_cs *engine)
{
	engine->submit_request = i9xx_submit_request;
	engine->cancel_requests = cancel_requests;

	engine->park = NULL;
	engine->unpark = NULL;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson35100.00%3100.00%


Total35100.00%3100.00%






static void gen6_bsd_set_default_submission(struct intel_engine_cs *engine)
{
	i9xx_set_default_submission(engine);
	engine->submit_request = gen6_bsd_submit_request;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson22100.00%3100.00%


Total22100.00%3100.00%






static void intel_ring_default_vfuncs(struct drm_i915_private *dev_priv,
				      struct intel_engine_cs *engine)
{
	/* gen8+ are only supported with execlists */
	GEM_BUG_ON(INTEL_GEN(dev_priv) >= 8);

	intel_ring_init_irq(dev_priv, engine);
	intel_ring_init_semaphores(dev_priv, engine);

	engine->init_hw = init_ring_common;
	engine->reset_hw = reset_ring_common;

	engine->context_pin = intel_ring_context_pin;
	engine->context_unpin = intel_ring_context_unpin;

	engine->request_alloc = ring_request_alloc;

	engine->emit_breadcrumb = i9xx_emit_breadcrumb;
	engine->emit_breadcrumb_sz = i9xx_emit_breadcrumb_sz;
	if (HAS_LEGACY_SEMAPHORES(dev_priv)) {
		int num_rings;

		engine->emit_breadcrumb = gen6_sema_emit_breadcrumb;

		num_rings = INTEL_INFO(dev_priv)->num_rings - 1;
		engine->emit_breadcrumb_sz += num_rings * 3;
		if (num_rings & 1)
			engine->emit_breadcrumb_sz++;
	}

	engine->set_default_submission = i9xx_set_default_submission;

	if (INTEL_GEN(dev_priv) >= 6)
		engine->emit_bb_start = gen6_emit_bb_start;
	else if (INTEL_GEN(dev_priv) >= 4)
		engine->emit_bb_start = i965_emit_bb_start;
	else if (IS_I830(dev_priv) || IS_I845G(dev_priv))
		engine->emit_bb_start = i830_emit_bb_start;
	else
		engine->emit_bb_start = i915_emit_bb_start;
}


Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson15278.35%1466.67%


Tvrtko A. Ursulin2311.86%314.29%


Daniel Vetter178.76%29.52%


Xiang, Haihao10.52%14.76%


Jani Nikula10.52%14.76%


Total194100.00%21100.00%






int intel_init_render_ring_buffer(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;
	int ret;

	intel_ring_default_vfuncs(dev_priv, engine);

	if (HAS_L3_DPF(dev_priv))
		engine->irq_keep_mask = GT_RENDER_L3_PARITY_ERROR_INTERRUPT;

	if (INTEL_GEN(dev_priv) >= 6) {
		engine->init_context = intel_rcs_ctx_init;
		engine->emit_flush = gen7_render_ring_flush;
		if (IS_GEN6(dev_priv))
			engine->emit_flush = gen6_render_ring_flush;
	} else if (IS_GEN5(dev_priv)) {
		engine->emit_flush = gen4_render_ring_flush;
	} else {
		if (INTEL_GEN(dev_priv) < 4)
			engine->emit_flush = gen2_render_ring_flush;
		else
			engine->emit_flush = gen4_render_ring_flush;
		engine->irq_enable_mask = I915_USER_INTERRUPT;
	}

	if (IS_HASWELL(dev_priv))
		engine->emit_bb_start = hsw_emit_bb_start;

	engine->init_hw = init_render_ring;

	ret = intel_init_ring_buffer(engine);
	if (ret)
		return ret;

	if (INTEL_GEN(dev_priv) >= 6) {
		ret = intel_engine_create_scratch(engine, PAGE_SIZE);
		if (ret)
			return ret;
	} else if (HAS_BROKEN_CS_TLB(dev_priv)) {
		ret = intel_engine_create_scratch(engine, I830_WA_SIZE);
		if (ret)
			return ret;
	}

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Tvrtko A. Ursulin11654.21%414.81%


Chris Wilson4721.96%1140.74%


Daniel Vetter188.41%414.81%


Xiang, Haihao125.61%27.41%


Yakui Zhao104.67%13.70%


Ben Widawsky73.27%311.11%


Jesse Barnes20.93%13.70%


Jani Nikula20.93%13.70%


Total214100.00%27100.00%






int intel_init_bsd_ring_buffer(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;

	intel_ring_default_vfuncs(dev_priv, engine);

	if (INTEL_GEN(dev_priv) >= 6) {
		/* gen6 bsd needs a special wa for tail updates */
		if (IS_GEN6(dev_priv))
			engine->set_default_submission = gen6_bsd_set_default_submission;
		engine->emit_flush = gen6_bsd_ring_flush;
		engine->irq_enable_mask = GT_BSD_USER_INTERRUPT;
	} else {
		engine->mmio_base = BSD_RING_BASE;
		engine->emit_flush = bsd_ring_flush;
		if (IS_GEN5(dev_priv))
			engine->irq_enable_mask = ILK_BSD_USER_INTERRUPT;
		else
			engine->irq_enable_mask = I915_BSD_USER_INTERRUPT;
	}

	return intel_init_ring_buffer(engine);
}


Contributors
PersonTokensPropCommitsCommitProp
Tvrtko A. Ursulin6259.62%426.67%


Chris Wilson1817.31%640.00%


Ben Widawsky1312.50%320.00%


Daniel Vetter98.65%16.67%


Jani Nikula21.92%16.67%


Total104100.00%15100.00%






int intel_init_blt_ring_buffer(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;

	intel_ring_default_vfuncs(dev_priv, engine);

	engine->emit_flush = gen6_ring_flush;
	engine->irq_enable_mask = GT_BLT_USER_INTERRUPT;

	return intel_init_ring_buffer(engine);
}


Contributors
PersonTokensPropCommitsCommitProp
Ben Widawsky2147.73%333.33%


Tvrtko A. Ursulin2045.45%444.44%


Jani Nikula24.55%111.11%


Chris Wilson12.27%111.11%


Total44100.00%9100.00%






int intel_init_vebox_ring_buffer(struct intel_engine_cs *engine)
{
	struct drm_i915_private *dev_priv = engine->i915;

	intel_ring_default_vfuncs(dev_priv, engine);

	engine->emit_flush = gen6_ring_flush;
	engine->irq_enable_mask = PM_VEBOX_USER_INTERRUPT;
	engine->irq_enable = hsw_vebox_irq_enable;
	engine->irq_disable = hsw_vebox_irq_disable;

	return intel_init_ring_buffer(engine);
}

Contributors
PersonTokensPropCommitsCommitProp
Tvrtko A. Ursulin3155.36%333.33%


Ben Widawsky1323.21%222.22%


Chris Wilson814.29%333.33%


Yakui Zhao47.14%111.11%


Total56100.00%9100.00%




Overall Contributors
PersonTokensPropCommitsCommitProp
Chris Wilson495359.47%17453.54%


Tvrtko A. Ursulin124114.90%237.08%


Daniel Vetter4074.89%288.62%


Ben Widawsky3003.60%216.46%


Zou Nan hai2142.57%41.23%


Jesse Barnes1902.28%51.54%


Damien Lespiau1692.03%10.31%


Paulo Zanoni1651.98%51.54%


Eric Anholt1151.38%10.31%


Ville Syrjälä1021.22%103.08%


Xiang, Haihao921.10%30.92%


John Harrison650.78%103.08%


Oscar Mateo620.74%61.85%


Thomas Daniel590.71%10.31%


Akash Goel310.37%41.23%


Dave Gordon240.29%51.54%


Yakui Zhao220.26%10.31%


Daniele Ceraolo Spurio210.25%20.62%


Naresh Kumar Kachhi170.20%20.62%


Jani Nikula170.20%20.62%


Abdiel Janulgue110.13%10.31%


Michel Thierry90.11%10.31%


Mika Kuoppala70.08%30.92%


Konrad Zapalowicz70.08%10.31%


Jiri Kosina50.06%10.31%


Francisco Jerez40.05%10.31%


Zeng Zhaoxiu30.04%10.31%


Sean Paul30.04%10.31%


Joonas Lahtinen30.04%10.31%


Carlos Santa30.04%10.31%


Deepak S20.02%10.31%


Zhenyu Wang20.02%10.31%


Imre Deak10.01%10.31%


David Howells10.01%10.31%


Tomas Elf10.01%10.31%


Total8328100.00%325100.00%


Directory: drivers/gpu/drm/i915



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