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path: root/drivers/gpu/drm/i915/intel_lrc.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_lrc.c')
-rw-r--r--drivers/gpu/drm/i915/intel_lrc.c943
1 files changed, 350 insertions, 593 deletions
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 47517a02f0a4..dac4e003c1f3 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -190,13 +190,7 @@
#define CTX_R_PWR_CLK_STATE 0x42
#define CTX_GPGPU_CSR_BASE_ADDRESS 0x44
-#define GEN8_CTX_VALID (1<<0)
-#define GEN8_CTX_FORCE_PD_RESTORE (1<<1)
-#define GEN8_CTX_FORCE_RESTORE (1<<2)
-#define GEN8_CTX_L3LLC_COHERENT (1<<5)
-#define GEN8_CTX_PRIVILEGE (1<<8)
-
-#define ASSIGN_CTX_REG(reg_state, pos, reg, val) do { \
+#define CTX_REG(reg_state, pos, reg, val) do { \
(reg_state)[(pos)+0] = i915_mmio_reg_offset(reg); \
(reg_state)[(pos)+1] = (val); \
} while (0)
@@ -212,14 +206,6 @@
reg_state[CTX_PDP0_LDW + 1] = lower_32_bits(px_dma(&ppgtt->pml4)); \
} while (0)
-enum {
- FAULT_AND_HANG = 0,
- FAULT_AND_HALT, /* Debug only */
- FAULT_AND_STREAM,
- FAULT_AND_CONTINUE /* Unsupported */
-};
-#define GEN8_CTX_ID_SHIFT 32
-#define GEN8_CTX_ID_WIDTH 21
#define GEN8_CTX_RCS_INDIRECT_CTX_OFFSET_DEFAULT 0x17
#define GEN9_CTX_RCS_INDIRECT_CTX_OFFSET_DEFAULT 0x26
@@ -267,30 +253,6 @@ int intel_sanitize_enable_execlists(struct drm_i915_private *dev_priv, int enabl
return 0;
}
-static void
-logical_ring_init_platform_invariants(struct intel_engine_cs *engine)
-{
- struct drm_i915_private *dev_priv = engine->i915;
-
- engine->disable_lite_restore_wa =
- IS_BXT_REVID(dev_priv, 0, BXT_REVID_A1) &&
- (engine->id == VCS || engine->id == VCS2);
-
- engine->ctx_desc_template = GEN8_CTX_VALID;
- if (IS_GEN8(dev_priv))
- engine->ctx_desc_template |= GEN8_CTX_L3LLC_COHERENT;
- engine->ctx_desc_template |= GEN8_CTX_PRIVILEGE;
-
- /* TODO: WaDisableLiteRestore when we start using semaphore
- * signalling between Command Streamers */
- /* ring->ctx_desc_template |= GEN8_CTX_FORCE_RESTORE; */
-
- /* WaEnableForceRestoreInCtxtDescForVCS:skl */
- /* WaEnableForceRestoreInCtxtDescForVCS:bxt */
- if (engine->disable_lite_restore_wa)
- engine->ctx_desc_template |= GEN8_CTX_FORCE_RESTORE;
-}
-
/**
* intel_lr_context_descriptor_update() - calculate & cache the descriptor
* descriptor for a pinned context
@@ -304,7 +266,7 @@ logical_ring_init_platform_invariants(struct intel_engine_cs *engine)
*
* This is what a descriptor looks like, from LSB to MSB::
*
- * bits 0-11: flags, GEN8_CTX_* (cached in ctx_desc_template)
+ * bits 0-11: flags, GEN8_CTX_* (cached in ctx->desc_template)
* bits 12-31: LRCA, GTT address of (the HWSP of) this context
* bits 32-52: ctx ID, a globally unique tag
* bits 53-54: mbz, reserved for use by hardware
@@ -319,8 +281,7 @@ intel_lr_context_descriptor_update(struct i915_gem_context *ctx,
BUILD_BUG_ON(MAX_CONTEXT_HW_ID > (1<<GEN8_CTX_ID_WIDTH));
- desc = ctx->desc_template; /* bits 3-4 */
- desc |= engine->ctx_desc_template; /* bits 0-11 */
+ desc = ctx->desc_template; /* bits 0-11 */
desc |= i915_ggtt_offset(ce->state) + LRC_PPHWSP_PN * PAGE_SIZE;
/* bits 12-31 */
desc |= (u64)ctx->hw_id << GEN8_CTX_ID_SHIFT; /* bits 32-52 */
@@ -365,6 +326,7 @@ static u64 execlists_update_context(struct drm_i915_gem_request *rq)
rq->ctx->ppgtt ?: rq->i915->mm.aliasing_ppgtt;
u32 *reg_state = ce->lrc_reg_state;
+ assert_ring_tail_valid(rq->ring, rq->tail);
reg_state[CTX_RING_TAIL+1] = rq->tail;
/* True 32b PPGTT with dynamic page allocation: update PDP
@@ -372,7 +334,7 @@ static u64 execlists_update_context(struct drm_i915_gem_request *rq)
* PML4 is allocated during ppgtt init, so this is not needed
* in 48-bit mode.
*/
- if (ppgtt && !USES_FULL_48BIT_PPGTT(ppgtt->base.dev))
+ if (ppgtt && !i915_vm_is_48bit(&ppgtt->base))
execlists_update_context_pdps(ppgtt, reg_state);
return ce->lrc_desc;
@@ -386,17 +348,20 @@ static void execlists_submit_ports(struct intel_engine_cs *engine)
dev_priv->regs + i915_mmio_reg_offset(RING_ELSP(engine));
u64 desc[2];
+ GEM_BUG_ON(port[0].count > 1);
if (!port[0].count)
execlists_context_status_change(port[0].request,
INTEL_CONTEXT_SCHEDULE_IN);
desc[0] = execlists_update_context(port[0].request);
- engine->preempt_wa = port[0].count++; /* bdw only? fixed on skl? */
+ GEM_DEBUG_EXEC(port[0].context_id = upper_32_bits(desc[0]));
+ port[0].count++;
if (port[1].request) {
GEM_BUG_ON(port[1].count);
execlists_context_status_change(port[1].request,
INTEL_CONTEXT_SCHEDULE_IN);
desc[1] = execlists_update_context(port[1].request);
+ GEM_DEBUG_EXEC(port[1].context_id = upper_32_bits(desc[1]));
port[1].count = 1;
} else {
desc[1] = 0;
@@ -434,7 +399,6 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
{
struct drm_i915_gem_request *last;
struct execlist_port *port = engine->execlist_port;
- unsigned long flags;
struct rb_node *rb;
bool submit = false;
@@ -471,7 +435,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
* and context switches) submission.
*/
- spin_lock_irqsave(&engine->timeline->lock, flags);
+ spin_lock_irq(&engine->timeline->lock);
rb = engine->execlist_first;
while (rb) {
struct drm_i915_gem_request *cursor =
@@ -515,6 +479,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
cursor->priotree.priority = INT_MAX;
__i915_gem_request_submit(cursor);
+ trace_i915_gem_request_in(cursor, port - engine->execlist_port);
last = cursor;
submit = true;
}
@@ -522,7 +487,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
i915_gem_request_assign(&port->request, last);
engine->execlist_first = rb;
}
- spin_unlock_irqrestore(&engine->timeline->lock, flags);
+ spin_unlock_irq(&engine->timeline->lock);
if (submit)
execlists_submit_ports(engine);
@@ -533,37 +498,11 @@ static bool execlists_elsp_idle(struct intel_engine_cs *engine)
return !engine->execlist_port[0].request;
}
-/**
- * intel_execlists_idle() - Determine if all engine submission ports are idle
- * @dev_priv: i915 device private
- *
- * Return true if there are no requests pending on any of the submission ports
- * of any engines.
- */
-bool intel_execlists_idle(struct drm_i915_private *dev_priv)
-{
- struct intel_engine_cs *engine;
- enum intel_engine_id id;
-
- if (!i915.enable_execlists)
- return true;
-
- for_each_engine(engine, dev_priv, id)
- if (!execlists_elsp_idle(engine))
- return false;
-
- return true;
-}
-
-static bool execlists_elsp_ready(struct intel_engine_cs *engine)
+static bool execlists_elsp_ready(const struct intel_engine_cs *engine)
{
- int port;
-
- port = 1; /* wait for a free slot */
- if (engine->disable_lite_restore_wa || engine->preempt_wa)
- port = 0; /* wait for GPU to be idle before continuing */
+ const struct execlist_port *port = engine->execlist_port;
- return !engine->execlist_port[port].request;
+ return port[0].count + port[1].count < 2;
}
/*
@@ -578,44 +517,80 @@ static void intel_lrc_irq_handler(unsigned long data)
intel_uncore_forcewake_get(dev_priv, engine->fw_domains);
- if (!execlists_elsp_idle(engine)) {
+ /* Prefer doing test_and_clear_bit() as a two stage operation to avoid
+ * imposing the cost of a locked atomic transaction when submitting a
+ * new request (outside of the context-switch interrupt).
+ */
+ while (test_bit(ENGINE_IRQ_EXECLIST, &engine->irq_posted)) {
u32 __iomem *csb_mmio =
dev_priv->regs + i915_mmio_reg_offset(RING_CONTEXT_STATUS_PTR(engine));
u32 __iomem *buf =
dev_priv->regs + i915_mmio_reg_offset(RING_CONTEXT_STATUS_BUF_LO(engine, 0));
- unsigned int csb, head, tail;
-
- csb = readl(csb_mmio);
- head = GEN8_CSB_READ_PTR(csb);
- tail = GEN8_CSB_WRITE_PTR(csb);
- if (tail < head)
- tail += GEN8_CSB_ENTRIES;
- while (head < tail) {
- unsigned int idx = ++head % GEN8_CSB_ENTRIES;
- unsigned int status = readl(buf + 2 * idx);
+ unsigned int head, tail;
+
+ /* The write will be ordered by the uncached read (itself
+ * a memory barrier), so we do not need another in the form
+ * of a locked instruction. The race between the interrupt
+ * handler and the split test/clear is harmless as we order
+ * our clear before the CSB read. If the interrupt arrived
+ * first between the test and the clear, we read the updated
+ * CSB and clear the bit. If the interrupt arrives as we read
+ * the CSB or later (i.e. after we had cleared the bit) the bit
+ * is set and we do a new loop.
+ */
+ __clear_bit(ENGINE_IRQ_EXECLIST, &engine->irq_posted);
+ head = readl(csb_mmio);
+ tail = GEN8_CSB_WRITE_PTR(head);
+ head = GEN8_CSB_READ_PTR(head);
+ while (head != tail) {
+ unsigned int status;
+
+ if (++head == GEN8_CSB_ENTRIES)
+ head = 0;
+
+ /* We are flying near dragons again.
+ *
+ * We hold a reference to the request in execlist_port[]
+ * but no more than that. We are operating in softirq
+ * context and so cannot hold any mutex or sleep. That
+ * prevents us stopping the requests we are processing
+ * in port[] from being retired simultaneously (the
+ * breadcrumb will be complete before we see the
+ * context-switch). As we only hold the reference to the
+ * request, any pointer chasing underneath the request
+ * is subject to a potential use-after-free. Thus we
+ * store all of the bookkeeping within port[] as
+ * required, and avoid using unguarded pointers beneath
+ * request itself. The same applies to the atomic
+ * status notifier.
+ */
+ status = readl(buf + 2 * head);
if (!(status & GEN8_CTX_STATUS_COMPLETED_MASK))
continue;
+ /* Check the context/desc id for this event matches */
+ GEM_DEBUG_BUG_ON(readl(buf + 2 * head + 1) !=
+ port[0].context_id);
+
GEM_BUG_ON(port[0].count == 0);
if (--port[0].count == 0) {
GEM_BUG_ON(status & GEN8_CTX_STATUS_PREEMPTED);
+ GEM_BUG_ON(!i915_gem_request_completed(port[0].request));
execlists_context_status_change(port[0].request,
INTEL_CONTEXT_SCHEDULE_OUT);
+ trace_i915_gem_request_out(port[0].request);
i915_gem_request_put(port[0].request);
port[0] = port[1];
memset(&port[1], 0, sizeof(port[1]));
-
- engine->preempt_wa = false;
}
GEM_BUG_ON(port[0].count == 0 &&
!(status & GEN8_CTX_STATUS_ACTIVE_IDLE));
}
- writel(_MASKED_FIELD(GEN8_CSB_READ_PTR_MASK,
- GEN8_CSB_WRITE_PTR(csb) << 8),
+ writel(_MASKED_FIELD(GEN8_CSB_READ_PTR_MASK, head << 8),
csb_mmio);
}
@@ -659,10 +634,11 @@ static void execlists_submit_request(struct drm_i915_gem_request *request)
/* Will be called from irq-context when using foreign fences. */
spin_lock_irqsave(&engine->timeline->lock, flags);
- if (insert_request(&request->priotree, &engine->execlist_queue))
+ if (insert_request(&request->priotree, &engine->execlist_queue)) {
engine->execlist_first = &request->priotree.node;
- if (execlists_elsp_idle(engine))
- tasklet_hi_schedule(&engine->irq_tasklet);
+ if (execlists_elsp_ready(engine))
+ tasklet_hi_schedule(&engine->irq_tasklet);
+ }
spin_unlock_irqrestore(&engine->timeline->lock, flags);
}
@@ -772,6 +748,7 @@ static int execlists_context_pin(struct intel_engine_cs *engine,
if (ce->pin_count++)
return 0;
+ GEM_BUG_ON(!ce->pin_count); /* no overflow please! */
if (!ce->state) {
ret = execlists_context_deferred_alloc(ctx, engine);
@@ -780,11 +757,9 @@ static int execlists_context_pin(struct intel_engine_cs *engine,
}
GEM_BUG_ON(!ce->state);
- flags = PIN_GLOBAL;
+ flags = PIN_GLOBAL | PIN_HIGH;
if (ctx->ggtt_offset_bias)
flags |= PIN_OFFSET_BIAS | ctx->ggtt_offset_bias;
- if (i915_gem_context_is_kernel(ctx))
- flags |= PIN_HIGH;
ret = i915_vma_pin(ce->state, 0, GEN8_LR_CONTEXT_ALIGN, flags);
if (ret)
@@ -843,6 +818,7 @@ static int execlists_request_alloc(struct drm_i915_gem_request *request)
{
struct intel_engine_cs *engine = request->engine;
struct intel_context *ce = &request->ctx->engine[engine->id];
+ u32 *cs;
int ret;
GEM_BUG_ON(!ce->pin_count);
@@ -867,9 +843,11 @@ static int execlists_request_alloc(struct drm_i915_gem_request *request)
goto err;
}
- ret = intel_ring_begin(request, 0);
- if (ret)
+ cs = intel_ring_begin(request, 0);
+ if (IS_ERR(cs)) {
+ ret = PTR_ERR(cs);
goto err_unreserve;
+ }
if (!ce->initialised) {
ret = engine->init_context(request);
@@ -896,51 +874,6 @@ err:
return ret;
}
-static int intel_logical_ring_workarounds_emit(struct drm_i915_gem_request *req)
-{
- int ret, i;
- struct intel_ring *ring = req->ring;
- struct i915_workarounds *w = &req->i915->workarounds;
-
- if (w->count == 0)
- return 0;
-
- ret = req->engine->emit_flush(req, EMIT_BARRIER);
- 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);
-
- ret = req->engine->emit_flush(req, EMIT_BARRIER);
- if (ret)
- return ret;
-
- return 0;
-}
-
-#define wa_ctx_emit(batch, index, cmd) \
- do { \
- int __index = (index)++; \
- if (WARN_ON(__index >= (PAGE_SIZE / sizeof(uint32_t)))) { \
- return -ENOSPC; \
- } \
- batch[__index] = (cmd); \
- } while (0)
-
-#define wa_ctx_emit_reg(batch, index, reg) \
- wa_ctx_emit((batch), (index), i915_mmio_reg_offset(reg))
-
/*
* In this WA we need to set GEN8_L3SQCREG4[21:21] and reset it after
* PIPE_CONTROL instruction. This is required for the flush to happen correctly
@@ -957,56 +890,29 @@ static int intel_logical_ring_workarounds_emit(struct drm_i915_gem_request *req)
* This WA is also required for Gen9 so extracting as a function avoids
* code duplication.
*/
-static inline int gen8_emit_flush_coherentl3_wa(struct intel_engine_cs *engine,
- uint32_t *batch,
- uint32_t index)
+static u32 *
+gen8_emit_flush_coherentl3_wa(struct intel_engine_cs *engine, u32 *batch)
{
- uint32_t l3sqc4_flush = (0x40400000 | GEN8_LQSC_FLUSH_COHERENT_LINES);
-
- wa_ctx_emit(batch, index, (MI_STORE_REGISTER_MEM_GEN8 |
- MI_SRM_LRM_GLOBAL_GTT));
- wa_ctx_emit_reg(batch, index, GEN8_L3SQCREG4);
- wa_ctx_emit(batch, index, i915_ggtt_offset(engine->scratch) + 256);
- wa_ctx_emit(batch, index, 0);
-
- wa_ctx_emit(batch, index, MI_LOAD_REGISTER_IMM(1));
- wa_ctx_emit_reg(batch, index, GEN8_L3SQCREG4);
- wa_ctx_emit(batch, index, l3sqc4_flush);
-
- wa_ctx_emit(batch, index, GFX_OP_PIPE_CONTROL(6));
- wa_ctx_emit(batch, index, (PIPE_CONTROL_CS_STALL |
- PIPE_CONTROL_DC_FLUSH_ENABLE));
- wa_ctx_emit(batch, index, 0);
- wa_ctx_emit(batch, index, 0);
- wa_ctx_emit(batch, index, 0);
- wa_ctx_emit(batch, index, 0);
-
- wa_ctx_emit(batch, index, (MI_LOAD_REGISTER_MEM_GEN8 |
- MI_SRM_LRM_GLOBAL_GTT));
- wa_ctx_emit_reg(batch, index, GEN8_L3SQCREG4);
- wa_ctx_emit(batch, index, i915_ggtt_offset(engine->scratch) + 256);
- wa_ctx_emit(batch, index, 0);
-
- return index;
-}
+ *batch++ = MI_STORE_REGISTER_MEM_GEN8 | MI_SRM_LRM_GLOBAL_GTT;
+ *batch++ = i915_mmio_reg_offset(GEN8_L3SQCREG4);
+ *batch++ = i915_ggtt_offset(engine->scratch) + 256;
+ *batch++ = 0;
-static inline uint32_t wa_ctx_start(struct i915_wa_ctx_bb *wa_ctx,
- uint32_t offset,
- uint32_t start_alignment)
-{
- return wa_ctx->offset = ALIGN(offset, start_alignment);
-}
+ *batch++ = MI_LOAD_REGISTER_IMM(1);
+ *batch++ = i915_mmio_reg_offset(GEN8_L3SQCREG4);
+ *batch++ = 0x40400000 | GEN8_LQSC_FLUSH_COHERENT_LINES;
-static inline int wa_ctx_end(struct i915_wa_ctx_bb *wa_ctx,
- uint32_t offset,
- uint32_t size_alignment)
-{
- wa_ctx->size = offset - wa_ctx->offset;
+ batch = gen8_emit_pipe_control(batch,
+ PIPE_CONTROL_CS_STALL |
+ PIPE_CONTROL_DC_FLUSH_ENABLE,
+ 0);
- WARN(wa_ctx->size % size_alignment,
- "wa_ctx_bb failed sanity checks: size %d is not aligned to %d\n",
- wa_ctx->size, size_alignment);
- return 0;
+ *batch++ = MI_LOAD_REGISTER_MEM_GEN8 | MI_SRM_LRM_GLOBAL_GTT;
+ *batch++ = i915_mmio_reg_offset(GEN8_L3SQCREG4);
+ *batch++ = i915_ggtt_offset(engine->scratch) + 256;
+ *batch++ = 0;
+
+ return batch;
}
/*
@@ -1024,42 +930,28 @@ static inline int wa_ctx_end(struct i915_wa_ctx_bb *wa_ctx,
* MI_BATCH_BUFFER_END will be added to perctx batch and both of them together
* makes a complete batch buffer.
*/
-static int gen8_init_indirectctx_bb(struct intel_engine_cs *engine,
- struct i915_wa_ctx_bb *wa_ctx,
- uint32_t *batch,
- uint32_t *offset)
+static u32 *gen8_init_indirectctx_bb(struct intel_engine_cs *engine, u32 *batch)
{
- uint32_t scratch_addr;
- uint32_t index = wa_ctx_start(wa_ctx, *offset, CACHELINE_DWORDS);
-
/* WaDisableCtxRestoreArbitration:bdw,chv */
- wa_ctx_emit(batch, index, MI_ARB_ON_OFF | MI_ARB_DISABLE);
+ *batch++ = MI_ARB_ON_OFF | MI_ARB_DISABLE;
/* WaFlushCoherentL3CacheLinesAtContextSwitch:bdw */
- if (IS_BROADWELL(engine->i915)) {
- int rc = gen8_emit_flush_coherentl3_wa(engine, batch, index);
- if (rc < 0)
- return rc;
- index = rc;
- }
+ if (IS_BROADWELL(engine->i915))
+ batch = gen8_emit_flush_coherentl3_wa(engine, batch);
/* WaClearSlmSpaceAtContextSwitch:bdw,chv */
/* Actual scratch location is at 128 bytes offset */
- scratch_addr = i915_ggtt_offset(engine->scratch) + 2 * CACHELINE_BYTES;
-
- wa_ctx_emit(batch, index, GFX_OP_PIPE_CONTROL(6));
- wa_ctx_emit(batch, index, (PIPE_CONTROL_FLUSH_L3 |
- PIPE_CONTROL_GLOBAL_GTT_IVB |
- PIPE_CONTROL_CS_STALL |
- PIPE_CONTROL_QW_WRITE));
- wa_ctx_emit(batch, index, scratch_addr);
- wa_ctx_emit(batch, index, 0);
- wa_ctx_emit(batch, index, 0);
- wa_ctx_emit(batch, index, 0);
+ batch = gen8_emit_pipe_control(batch,
+ PIPE_CONTROL_FLUSH_L3 |
+ PIPE_CONTROL_GLOBAL_GTT_IVB |
+ PIPE_CONTROL_CS_STALL |
+ PIPE_CONTROL_QW_WRITE,
+ i915_ggtt_offset(engine->scratch) +
+ 2 * CACHELINE_BYTES);
/* Pad to end of cacheline */
- while (index % CACHELINE_DWORDS)
- wa_ctx_emit(batch, index, MI_NOOP);
+ while ((unsigned long)batch % CACHELINE_BYTES)
+ *batch++ = MI_NOOP;
/*
* MI_BATCH_BUFFER_END is not required in Indirect ctx BB because
@@ -1067,7 +959,7 @@ static int gen8_init_indirectctx_bb(struct intel_engine_cs *engine,
* in the register CTX_RCS_INDIRECT_CTX
*/
- return wa_ctx_end(wa_ctx, *offset = index, CACHELINE_DWORDS);
+ return batch;
}
/*
@@ -1079,65 +971,40 @@ static int gen8_init_indirectctx_bb(struct intel_engine_cs *engine,
* This batch is terminated with MI_BATCH_BUFFER_END and so we need not add padding
* to align it with cacheline as padding after MI_BATCH_BUFFER_END is redundant.
*/
-static int gen8_init_perctx_bb(struct intel_engine_cs *engine,
- struct i915_wa_ctx_bb *wa_ctx,
- uint32_t *batch,
- uint32_t *offset)
+static u32 *gen8_init_perctx_bb(struct intel_engine_cs *engine, u32 *batch)
{
- uint32_t index = wa_ctx_start(wa_ctx, *offset, CACHELINE_DWORDS);
-
/* WaDisableCtxRestoreArbitration:bdw,chv */
- wa_ctx_emit(batch, index, MI_ARB_ON_OFF | MI_ARB_ENABLE);
-
- wa_ctx_emit(batch, index, MI_BATCH_BUFFER_END);
+ *batch++ = MI_ARB_ON_OFF | MI_ARB_ENABLE;
+ *batch++ = MI_BATCH_BUFFER_END;
- return wa_ctx_end(wa_ctx, *offset = index, 1);
+ return batch;
}
-static int gen9_init_indirectctx_bb(struct intel_engine_cs *engine,
- struct i915_wa_ctx_bb *wa_ctx,
- uint32_t *batch,
- uint32_t *offset)
+static u32 *gen9_init_indirectctx_bb(struct intel_engine_cs *engine, u32 *batch)
{
- int ret;
- struct drm_i915_private *dev_priv = engine->i915;
- uint32_t index = wa_ctx_start(wa_ctx, *offset, CACHELINE_DWORDS);
+ /* WaFlushCoherentL3CacheLinesAtContextSwitch:skl,bxt,glk */
+ batch = gen8_emit_flush_coherentl3_wa(engine, batch);
- /* WaDisableCtxRestoreArbitration:bxt */
- if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_A1))
- wa_ctx_emit(batch, index, MI_ARB_ON_OFF | MI_ARB_DISABLE);
-
- /* WaFlushCoherentL3CacheLinesAtContextSwitch:skl,bxt */
- ret = gen8_emit_flush_coherentl3_wa(engine, batch, index);
- if (ret < 0)
- return ret;
- index = ret;
-
- /* WaDisableGatherAtSetShaderCommonSlice:skl,bxt,kbl */
- wa_ctx_emit(batch, index, MI_LOAD_REGISTER_IMM(1));
- wa_ctx_emit_reg(batch, index, COMMON_SLICE_CHICKEN2);
- wa_ctx_emit(batch, index, _MASKED_BIT_DISABLE(
- GEN9_DISABLE_GATHER_AT_SET_SHADER_COMMON_SLICE));
- wa_ctx_emit(batch, index, MI_NOOP);
+ /* WaDisableGatherAtSetShaderCommonSlice:skl,bxt,kbl,glk */
+ *batch++ = MI_LOAD_REGISTER_IMM(1);
+ *batch++ = i915_mmio_reg_offset(COMMON_SLICE_CHICKEN2);
+ *batch++ = _MASKED_BIT_DISABLE(
+ GEN9_DISABLE_GATHER_AT_SET_SHADER_COMMON_SLICE);
+ *batch++ = MI_NOOP;
/* WaClearSlmSpaceAtContextSwitch:kbl */
/* Actual scratch location is at 128 bytes offset */
- if (IS_KBL_REVID(dev_priv, 0, KBL_REVID_A0)) {
- u32 scratch_addr =
- i915_ggtt_offset(engine->scratch) + 2 * CACHELINE_BYTES;
-
- wa_ctx_emit(batch, index, GFX_OP_PIPE_CONTROL(6));
- wa_ctx_emit(batch, index, (PIPE_CONTROL_FLUSH_L3 |
- PIPE_CONTROL_GLOBAL_GTT_IVB |
- PIPE_CONTROL_CS_STALL |
- PIPE_CONTROL_QW_WRITE));
- wa_ctx_emit(batch, index, scratch_addr);
- wa_ctx_emit(batch, index, 0);
- wa_ctx_emit(batch, index, 0);
- wa_ctx_emit(batch, index, 0);
+ if (IS_KBL_REVID(engine->i915, 0, KBL_REVID_A0)) {
+ batch = gen8_emit_pipe_control(batch,
+ PIPE_CONTROL_FLUSH_L3 |
+ PIPE_CONTROL_GLOBAL_GTT_IVB |
+ PIPE_CONTROL_CS_STALL |
+ PIPE_CONTROL_QW_WRITE,
+ i915_ggtt_offset(engine->scratch)
+ + 2 * CACHELINE_BYTES);
}
- /* WaMediaPoolStateCmdInWABB:bxt */
+ /* WaMediaPoolStateCmdInWABB:bxt,glk */
if (HAS_POOLED_EU(engine->i915)) {
/*
* EU pool configuration is setup along with golden context
@@ -1152,73 +1019,37 @@ static int gen9_init_indirectctx_bb(struct intel_engine_cs *engine,
* possible configurations, to avoid duplication they are
* not shown here again.
*/
- u32 eu_pool_config = 0x00777000;
- wa_ctx_emit(batch, index, GEN9_MEDIA_POOL_STATE);
- wa_ctx_emit(batch, index, GEN9_MEDIA_POOL_ENABLE);
- wa_ctx_emit(batch, index, eu_pool_config);
- wa_ctx_emit(batch, index, 0);
- wa_ctx_emit(batch, index, 0);
- wa_ctx_emit(batch, index, 0);
+ *batch++ = GEN9_MEDIA_POOL_STATE;
+ *batch++ = GEN9_MEDIA_POOL_ENABLE;
+ *batch++ = 0x00777000;
+ *batch++ = 0;
+ *batch++ = 0;
+ *batch++ = 0;
}
/* Pad to end of cacheline */
- while (index % CACHELINE_DWORDS)
- wa_ctx_emit(batch, index, MI_NOOP);
+ while ((unsigned long)batch % CACHELINE_BYTES)
+ *batch++ = MI_NOOP;
- return wa_ctx_end(wa_ctx, *offset = index, CACHELINE_DWORDS);
+ return batch;
}
-static int gen9_init_perctx_bb(struct intel_engine_cs *engine,
- struct i915_wa_ctx_bb *wa_ctx,
- uint32_t *batch,
- uint32_t *offset)
+static u32 *gen9_init_perctx_bb(struct intel_engine_cs *engine, u32 *batch)
{
- uint32_t index = wa_ctx_start(wa_ctx, *offset, CACHELINE_DWORDS);
-
- /* WaSetDisablePixMaskCammingAndRhwoInCommonSliceChicken:bxt */
- if (IS_BXT_REVID(engine->i915, 0, BXT_REVID_A1)) {
- wa_ctx_emit(batch, index, MI_LOAD_REGISTER_IMM(1));
- wa_ctx_emit_reg(batch, index, GEN9_SLICE_COMMON_ECO_CHICKEN0);
- wa_ctx_emit(batch, index,
- _MASKED_BIT_ENABLE(DISABLE_PIXEL_MASK_CAMMING));
- wa_ctx_emit(batch, index, MI_NOOP);
- }
+ *batch++ = MI_BATCH_BUFFER_END;
- /* WaClearTdlStateAckDirtyBits:bxt */
- if (IS_BXT_REVID(engine->i915, 0, BXT_REVID_B0)) {
- wa_ctx_emit(batch, index, MI_LOAD_REGISTER_IMM(4));
-
- wa_ctx_emit_reg(batch, index, GEN8_STATE_ACK);
- wa_ctx_emit(batch, index, _MASKED_BIT_DISABLE(GEN9_SUBSLICE_TDL_ACK_BITS));
-
- wa_ctx_emit_reg(batch, index, GEN9_STATE_ACK_SLICE1);
- wa_ctx_emit(batch, index, _MASKED_BIT_DISABLE(GEN9_SUBSLICE_TDL_ACK_BITS));
-
- wa_ctx_emit_reg(batch, index, GEN9_STATE_ACK_SLICE2);
- wa_ctx_emit(batch, index, _MASKED_BIT_DISABLE(GEN9_SUBSLICE_TDL_ACK_BITS));
-
- wa_ctx_emit_reg(batch, index, GEN7_ROW_CHICKEN2);
- /* dummy write to CS, mask bits are 0 to ensure the register is not modified */
- wa_ctx_emit(batch, index, 0x0);
- wa_ctx_emit(batch, index, MI_NOOP);
- }
-
- /* WaDisableCtxRestoreArbitration:bxt */
- if (IS_BXT_REVID(engine->i915, 0, BXT_REVID_A1))
- wa_ctx_emit(batch, index, MI_ARB_ON_OFF | MI_ARB_ENABLE);
-
- wa_ctx_emit(batch, index, MI_BATCH_BUFFER_END);
-
- return wa_ctx_end(wa_ctx, *offset = index, 1);
+ return batch;
}
-static int lrc_setup_wa_ctx_obj(struct intel_engine_cs *engine, u32 size)
+#define CTX_WA_BB_OBJ_SIZE (PAGE_SIZE)
+
+static int lrc_setup_wa_ctx(struct intel_engine_cs *engine)
{
struct drm_i915_gem_object *obj;
struct i915_vma *vma;
int err;
- obj = i915_gem_object_create(engine->i915, PAGE_ALIGN(size));
+ obj = i915_gem_object_create(engine->i915, CTX_WA_BB_OBJ_SIZE);
if (IS_ERR(obj))
return PTR_ERR(obj);
@@ -1240,82 +1071,79 @@ err:
return err;
}
-static void lrc_destroy_wa_ctx_obj(struct intel_engine_cs *engine)
+static void lrc_destroy_wa_ctx(struct intel_engine_cs *engine)
{
i915_vma_unpin_and_release(&engine->wa_ctx.vma);
}
+typedef u32 *(*wa_bb_func_t)(struct intel_engine_cs *engine, u32 *batch);
+
static int intel_init_workaround_bb(struct intel_engine_cs *engine)
{
struct i915_ctx_workarounds *wa_ctx = &engine->wa_ctx;
- uint32_t *batch;
- uint32_t offset;
+ struct i915_wa_ctx_bb *wa_bb[2] = { &wa_ctx->indirect_ctx,
+ &wa_ctx->per_ctx };
+ wa_bb_func_t wa_bb_fn[2];
struct page *page;
+ void *batch, *batch_ptr;
+ unsigned int i;
int ret;
- WARN_ON(engine->id != RCS);
+ if (WARN_ON(engine->id != RCS || !engine->scratch))
+ return -EINVAL;
- /* update this when WA for higher Gen are added */
- if (INTEL_GEN(engine->i915) > 9) {
- DRM_ERROR("WA batch buffer is not initialized for Gen%d\n",
- INTEL_GEN(engine->i915));
+ switch (INTEL_GEN(engine->i915)) {
+ case 9:
+ wa_bb_fn[0] = gen9_init_indirectctx_bb;
+ wa_bb_fn[1] = gen9_init_perctx_bb;
+ break;
+ case 8:
+ wa_bb_fn[0] = gen8_init_indirectctx_bb;
+ wa_bb_fn[1] = gen8_init_perctx_bb;
+ break;
+ default:
+ MISSING_CASE(INTEL_GEN(engine->i915));
return 0;
}
- /* some WA perform writes to scratch page, ensure it is valid */
- if (!engine->scratch) {
- DRM_ERROR("scratch page not allocated for %s\n", engine->name);
- return -EINVAL;
- }
-
- ret = lrc_setup_wa_ctx_obj(engine, PAGE_SIZE);
+ ret = lrc_setup_wa_ctx(engine);
if (ret) {
DRM_DEBUG_DRIVER("Failed to setup context WA page: %d\n", ret);
return ret;
}
page = i915_gem_object_get_dirty_page(wa_ctx->vma->obj, 0);
- batch = kmap_atomic(page);
- offset = 0;
-
- if (IS_GEN8(engine->i915)) {
- ret = gen8_init_indirectctx_bb(engine,
- &wa_ctx->indirect_ctx,
- batch,
- &offset);
- if (ret)
- goto out;
+ batch = batch_ptr = kmap_atomic(page);
- ret = gen8_init_perctx_bb(engine,
- &wa_ctx->per_ctx,
- batch,
- &offset);
- if (ret)
- goto out;
- } else if (IS_GEN9(engine->i915)) {
- ret = gen9_init_indirectctx_bb(engine,
- &wa_ctx->indirect_ctx,
- batch,
- &offset);
- if (ret)
- goto out;
-
- ret = gen9_init_perctx_bb(engine,
- &wa_ctx->per_ctx,
- batch,
- &offset);
- if (ret)
- goto out;
+ /*
+ * Emit the two workaround batch buffers, recording the offset from the
+ * start of the workaround batch buffer object for each and their
+ * respective sizes.
+ */
+ for (i = 0; i < ARRAY_SIZE(wa_bb_fn); i++) {
+ wa_bb[i]->offset = batch_ptr - batch;
+ if (WARN_ON(!IS_ALIGNED(wa_bb[i]->offset, CACHELINE_BYTES))) {
+ ret = -EINVAL;
+ break;
+ }
+ batch_ptr = wa_bb_fn[i](engine, batch_ptr);
+ wa_bb[i]->size = batch_ptr - (batch + wa_bb[i]->offset);
}
-out:
+ BUG_ON(batch_ptr - batch > CTX_WA_BB_OBJ_SIZE);
+
kunmap_atomic(batch);
if (ret)
- lrc_destroy_wa_ctx_obj(engine);
+ lrc_destroy_wa_ctx(engine);
return ret;
}
+static u32 port_seqno(struct execlist_port *port)
+{
+ return port->request ? port->request->global_seqno : 0;
+}
+
static int gen8_init_common_ring(struct intel_engine_cs *engine)
{
struct drm_i915_private *dev_priv = engine->i915;
@@ -1330,7 +1158,6 @@ static int gen8_init_common_ring(struct intel_engine_cs *engine)
I915_WRITE(RING_HWSTAM(engine->mmio_base), 0xffffffff);
I915_WRITE(RING_MODE_GEN7(engine),
- _MASKED_BIT_DISABLE(GFX_REPLAY_MODE) |
_MASKED_BIT_ENABLE(GFX_RUN_LIST_ENABLE));
I915_WRITE(RING_HWS_PGA(engine->mmio_base),
engine->status_page.ggtt_offset);
@@ -1339,7 +1166,12 @@ static int gen8_init_common_ring(struct intel_engine_cs *engine)
DRM_DEBUG_DRIVER("Execlists enabled for %s\n", engine->name);
/* After a GPU reset, we may have requests to replay */
- if (!execlists_elsp_idle(engine)) {
+ clear_bit(ENGINE_IRQ_EXECLIST, &engine->irq_posted);
+ if (!i915.enable_guc_submission && !execlists_elsp_idle(engine)) {
+ DRM_DEBUG_DRIVER("Restarting %s from requests [0x%x, 0x%x]\n",
+ engine->name,
+ port_seqno(&engine->execlist_port[0]),
+ port_seqno(&engine->execlist_port[1]));
engine->execlist_port[0].count = 0;
engine->execlist_port[1].count = 0;
execlists_submit_ports(engine);
@@ -1384,7 +1216,6 @@ static int gen9_init_render_ring(struct intel_engine_cs *engine)
static void reset_common_ring(struct intel_engine_cs *engine,
struct drm_i915_gem_request *request)
{
- struct drm_i915_private *dev_priv = engine->i915;
struct execlist_port *port = engine->execlist_port;
struct intel_context *ce;
@@ -1418,14 +1249,9 @@ static void reset_common_ring(struct intel_engine_cs *engine,
ce->lrc_reg_state[CTX_RING_HEAD+1] = request->postfix;
request->ring->head = request->postfix;
- request->ring->last_retired_head = -1;
intel_ring_update_space(request->ring);
- if (i915.enable_guc_submission)
- return;
-
/* Catch up with any missed context-switch interrupts */
- I915_WRITE(RING_CONTEXT_STATUS_PTR(engine), _MASKED_FIELD(0xffff, 0));
if (request->ctx != port[0].request->ctx) {
i915_gem_request_put(port[0].request);
port[0] = port[1];
@@ -1438,42 +1264,42 @@ static void reset_common_ring(struct intel_engine_cs *engine,
request->tail =
intel_ring_wrap(request->ring,
request->wa_tail - WA_TAIL_DWORDS*sizeof(u32));
+ assert_ring_tail_valid(request->ring, request->tail);
}
static int intel_logical_ring_emit_pdps(struct drm_i915_gem_request *req)
{
struct i915_hw_ppgtt *ppgtt = req->ctx->ppgtt;
- struct intel_ring *ring = req->ring;
struct intel_engine_cs *engine = req->engine;
- const int num_lri_cmds = GEN8_LEGACY_PDPES * 2;
- int i, ret;
+ const int num_lri_cmds = GEN8_3LVL_PDPES * 2;
+ u32 *cs;
+ int i;
- ret = intel_ring_begin(req, num_lri_cmds * 2 + 2);
- if (ret)
- return ret;
+ cs = intel_ring_begin(req, num_lri_cmds * 2 + 2);
+ if (IS_ERR(cs))
+ return PTR_ERR(cs);
- intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(num_lri_cmds));
- for (i = GEN8_LEGACY_PDPES - 1; i >= 0; i--) {
+ *cs++ = MI_LOAD_REGISTER_IMM(num_lri_cmds);
+ for (i = GEN8_3LVL_PDPES - 1; i >= 0; i--) {
const dma_addr_t pd_daddr = i915_page_dir_dma_addr(ppgtt, i);
- intel_ring_emit_reg(ring, GEN8_RING_PDP_UDW(engine, i));
- intel_ring_emit(ring, upper_32_bits(pd_daddr));
- intel_ring_emit_reg(ring, GEN8_RING_PDP_LDW(engine, i));
- intel_ring_emit(ring, lower_32_bits(pd_daddr));
+ *cs++ = i915_mmio_reg_offset(GEN8_RING_PDP_UDW(engine, i));
+ *cs++ = upper_32_bits(pd_daddr);
+ *cs++ = i915_mmio_reg_offset(GEN8_RING_PDP_LDW(engine, i));
+ *cs++ = lower_32_bits(pd_daddr);
}
- intel_ring_emit(ring, MI_NOOP);
- intel_ring_advance(ring);
+ *cs++ = MI_NOOP;
+ intel_ring_advance(req, cs);
return 0;
}
static int gen8_emit_bb_start(struct drm_i915_gem_request *req,
u64 offset, u32 len,
- unsigned int dispatch_flags)
+ const unsigned int flags)
{
- struct intel_ring *ring = req->ring;
- bool ppgtt = !(dispatch_flags & I915_DISPATCH_SECURE);
+ u32 *cs;
int ret;
/* Don't rely in hw updating PDPs, specially in lite-restore.
@@ -1483,30 +1309,28 @@ static int gen8_emit_bb_start(struct drm_i915_gem_request *req,
* not idle). PML4 is allocated during ppgtt init so this is
* not needed in 48-bit.*/
if (req->ctx->ppgtt &&
- (intel_engine_flag(req->engine) & req->ctx->ppgtt->pd_dirty_rings)) {
- if (!USES_FULL_48BIT_PPGTT(req->i915) &&
- !intel_vgpu_active(req->i915)) {
- ret = intel_logical_ring_emit_pdps(req);
- if (ret)
- return ret;
- }
+ (intel_engine_flag(req->engine) & req->ctx->ppgtt->pd_dirty_rings) &&
+ !i915_vm_is_48bit(&req->ctx->ppgtt->base) &&
+ !intel_vgpu_active(req->i915)) {
+ ret = intel_logical_ring_emit_pdps(req);
+ if (ret)
+ return ret;
req->ctx->ppgtt->pd_dirty_rings &= ~intel_engine_flag(req->engine);
}
- ret = intel_ring_begin(req, 4);
- if (ret)
- return ret;
+ cs = intel_ring_begin(req, 4);
+ if (IS_ERR(cs))
+ return PTR_ERR(cs);
/* 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);
+ *cs++ = MI_BATCH_BUFFER_START_GEN8 |
+ (flags & I915_DISPATCH_SECURE ? 0 : BIT(8)) |
+ (flags & I915_DISPATCH_RS ? MI_BATCH_RESOURCE_STREAMER : 0);
+ *cs++ = lower_32_bits(offset);
+ *cs++ = upper_32_bits(offset);
+ *cs++ = MI_NOOP;
+ intel_ring_advance(req, cs);
return 0;
}
@@ -1527,13 +1351,11 @@ static void gen8_logical_ring_disable_irq(struct intel_engine_cs *engine)
static int gen8_emit_flush(struct drm_i915_gem_request *request, u32 mode)
{
- struct intel_ring *ring = request->ring;
- u32 cmd;
- int ret;
+ u32 cmd, *cs;
- ret = intel_ring_begin(request, 4);
- if (ret)
- return ret;
+ cs = intel_ring_begin(request, 4);
+ if (IS_ERR(cs))
+ return PTR_ERR(cs);
cmd = MI_FLUSH_DW + 1;
@@ -1550,13 +1372,11 @@ static int gen8_emit_flush(struct drm_i915_gem_request *request, u32 mode)
cmd |= MI_INVALIDATE_BSD;
}
- intel_ring_emit(ring, cmd);
- intel_ring_emit(ring,
- I915_GEM_HWS_SCRATCH_ADDR |
- MI_FLUSH_DW_USE_GTT);
- intel_ring_emit(ring, 0); /* upper addr */
- intel_ring_emit(ring, 0); /* value */
- intel_ring_advance(ring);
+ *cs++ = cmd;
+ *cs++ = I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT;
+ *cs++ = 0; /* upper addr */
+ *cs++ = 0; /* value */
+ intel_ring_advance(request, cs);
return 0;
}
@@ -1564,13 +1384,11 @@ static int gen8_emit_flush(struct drm_i915_gem_request *request, u32 mode)
static int gen8_emit_flush_render(struct drm_i915_gem_request *request,
u32 mode)
{
- struct intel_ring *ring = request->ring;
struct intel_engine_cs *engine = request->engine;
u32 scratch_addr =
i915_ggtt_offset(engine->scratch) + 2 * CACHELINE_BYTES;
bool vf_flush_wa = false, dc_flush_wa = false;
- u32 flags = 0;
- int ret;
+ u32 *cs, flags = 0;
int len;
flags |= PIPE_CONTROL_CS_STALL;
@@ -1612,62 +1430,25 @@ static int gen8_emit_flush_render(struct drm_i915_gem_request *request,
if (dc_flush_wa)
len += 12;
- ret = intel_ring_begin(request, len);
- if (ret)
- return ret;
+ cs = intel_ring_begin(request, len);
+ if (IS_ERR(cs))
+ return PTR_ERR(cs);
- if (vf_flush_wa) {
- intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(6));
- intel_ring_emit(ring, 0);
- intel_ring_emit(ring, 0);
- intel_ring_emit(ring, 0);
- intel_ring_emit(ring, 0);
- intel_ring_emit(ring, 0);
- }
+ if (vf_flush_wa)
+ cs = gen8_emit_pipe_control(cs, 0, 0);
- if (dc_flush_wa) {
- intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(6));
- intel_ring_emit(ring, PIPE_CONTROL_DC_FLUSH_ENABLE);
- intel_ring_emit(ring, 0);
- intel_ring_emit(ring, 0);
- intel_ring_emit(ring, 0);
- intel_ring_emit(ring, 0);
- }
+ if (dc_flush_wa)
+ cs = gen8_emit_pipe_control(cs, PIPE_CONTROL_DC_FLUSH_ENABLE,
+ 0);
- 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);
-
- if (dc_flush_wa) {
- intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(6));
- intel_ring_emit(ring, PIPE_CONTROL_CS_STALL);
- intel_ring_emit(ring, 0);
- intel_ring_emit(ring, 0);
- intel_ring_emit(ring, 0);
- intel_ring_emit(ring, 0);
- }
+ cs = gen8_emit_pipe_control(cs, flags, scratch_addr);
- intel_ring_advance(ring);
+ if (dc_flush_wa)
+ cs = gen8_emit_pipe_control(cs, PIPE_CONTROL_CS_STALL, 0);
- return 0;
-}
+ intel_ring_advance(request, cs);
-static void bxt_a_seqno_barrier(struct intel_engine_cs *engine)
-{
- /*
- * On BXT A steppings there is a HW coherency issue whereby the
- * MI_STORE_DATA_IMM storing the completed request's seqno
- * occasionally doesn't invalidate the CPU cache. Work around this by
- * clflushing the corresponding cacheline whenever the caller wants
- * the coherency to be guaranteed. Note that this cacheline is known
- * to be clean at this point, since we only write it in
- * bxt_a_set_seqno(), where we also do a clflush after the write. So
- * this clflush in practice becomes an invalidate operation.
- */
- intel_flush_status_page(engine, I915_GEM_HWS_INDEX);
+ return 0;
}
/*
@@ -1675,34 +1456,34 @@ static void bxt_a_seqno_barrier(struct intel_engine_cs *engine)
* used as a workaround for not being allowed to do lite
* restore with HEAD==TAIL (WaIdleLiteRestore).
*/
-static void gen8_emit_wa_tail(struct drm_i915_gem_request *request, u32 *out)
+static void gen8_emit_wa_tail(struct drm_i915_gem_request *request, u32 *cs)
{
- *out++ = MI_NOOP;
- *out++ = MI_NOOP;
- request->wa_tail = intel_ring_offset(request->ring, out);
+ *cs++ = MI_NOOP;
+ *cs++ = MI_NOOP;
+ request->wa_tail = intel_ring_offset(request, cs);
}
-static void gen8_emit_breadcrumb(struct drm_i915_gem_request *request,
- u32 *out)
+static void gen8_emit_breadcrumb(struct drm_i915_gem_request *request, u32 *cs)
{
/* w/a: bit 5 needs to be zero for MI_FLUSH_DW address. */
BUILD_BUG_ON(I915_GEM_HWS_INDEX_ADDR & (1 << 5));
- *out++ = (MI_FLUSH_DW + 1) | MI_FLUSH_DW_OP_STOREDW;
- *out++ = intel_hws_seqno_address(request->engine) | MI_FLUSH_DW_USE_GTT;
- *out++ = 0;
- *out++ = request->global_seqno;
- *out++ = MI_USER_INTERRUPT;
- *out++ = MI_NOOP;
- request->tail = intel_ring_offset(request->ring, out);
+ *cs++ = (MI_FLUSH_DW + 1) | MI_FLUSH_DW_OP_STOREDW;
+ *cs++ = intel_hws_seqno_address(request->engine) | MI_FLUSH_DW_USE_GTT;
+ *cs++ = 0;
+ *cs++ = request->global_seqno;
+ *cs++ = MI_USER_INTERRUPT;
+ *cs++ = MI_NOOP;
+ request->tail = intel_ring_offset(request, cs);
+ assert_ring_tail_valid(request->ring, request->tail);
- gen8_emit_wa_tail(request, out);
+ gen8_emit_wa_tail(request, cs);
}
static const int gen8_emit_breadcrumb_sz = 6 + WA_TAIL_DWORDS;
static void gen8_emit_breadcrumb_render(struct drm_i915_gem_request *request,
- u32 *out)
+ u32 *cs)
{
/* We're using qword write, seqno should be aligned to 8 bytes. */
BUILD_BUG_ON(I915_GEM_HWS_INDEX & 1);
@@ -1711,20 +1492,20 @@ static void gen8_emit_breadcrumb_render(struct drm_i915_gem_request *request,
* need a prior CS_STALL, which is emitted by the flush
* following the batch.
*/
- *out++ = GFX_OP_PIPE_CONTROL(6);
- *out++ = (PIPE_CONTROL_GLOBAL_GTT_IVB |
- PIPE_CONTROL_CS_STALL |
- PIPE_CONTROL_QW_WRITE);
- *out++ = intel_hws_seqno_address(request->engine);
- *out++ = 0;
- *out++ = request->global_seqno;
+ *cs++ = GFX_OP_PIPE_CONTROL(6);
+ *cs++ = PIPE_CONTROL_GLOBAL_GTT_IVB | PIPE_CONTROL_CS_STALL |
+ PIPE_CONTROL_QW_WRITE;
+ *cs++ = intel_hws_seqno_address(request->engine);
+ *cs++ = 0;
+ *cs++ = request->global_seqno;
/* We're thrashing one dword of HWS. */
- *out++ = 0;
- *out++ = MI_USER_INTERRUPT;
- *out++ = MI_NOOP;
- request->tail = intel_ring_offset(request->ring, out);
+ *cs++ = 0;
+ *cs++ = MI_USER_INTERRUPT;
+ *cs++ = MI_NOOP;
+ request->tail = intel_ring_offset(request, cs);
+ assert_ring_tail_valid(request->ring, request->tail);
- gen8_emit_wa_tail(request, out);
+ gen8_emit_wa_tail(request, cs);
}
static const int gen8_emit_breadcrumb_render_sz = 8 + WA_TAIL_DWORDS;
@@ -1733,7 +1514,7 @@ static int gen8_init_rcs_context(struct drm_i915_gem_request *req)
{
int ret;
- ret = intel_logical_ring_workarounds_emit(req);
+ ret = intel_ring_workarounds_emit(req);
if (ret)
return ret;
@@ -1779,21 +1560,17 @@ void intel_logical_ring_cleanup(struct intel_engine_cs *engine)
intel_engine_cleanup_common(engine);
- lrc_destroy_wa_ctx_obj(engine);
+ lrc_destroy_wa_ctx(engine);
engine->i915 = NULL;
dev_priv->engine[engine->id] = NULL;
kfree(engine);
}
-void intel_execlists_enable_submission(struct drm_i915_private *dev_priv)
+static void execlists_set_default_submission(struct intel_engine_cs *engine)
{
- struct intel_engine_cs *engine;
- enum intel_engine_id id;
-
- for_each_engine(engine, dev_priv, id) {
- engine->submit_request = execlists_submit_request;
- engine->schedule = execlists_schedule;
- }
+ engine->submit_request = execlists_submit_request;
+ engine->schedule = execlists_schedule;
+ engine->irq_tasklet.func = intel_lrc_irq_handler;
}
static void
@@ -1811,14 +1588,12 @@ logical_ring_default_vfuncs(struct intel_engine_cs *engine)
engine->emit_flush = gen8_emit_flush;
engine->emit_breadcrumb = gen8_emit_breadcrumb;
engine->emit_breadcrumb_sz = gen8_emit_breadcrumb_sz;
- engine->submit_request = execlists_submit_request;
- engine->schedule = execlists_schedule;
+
+ engine->set_default_submission = execlists_set_default_submission;
engine->irq_enable = gen8_logical_ring_enable_irq;
engine->irq_disable = gen8_logical_ring_disable_irq;
engine->emit_bb_start = gen8_emit_bb_start;
- if (IS_BXT_REVID(engine->i915, 0, BXT_REVID_A1))
- engine->irq_seqno_barrier = bxt_a_seqno_barrier;
}
static inline void
@@ -1875,7 +1650,6 @@ logical_ring_setup(struct intel_engine_cs *engine)
tasklet_init(&engine->irq_tasklet,
intel_lrc_irq_handler, (unsigned long)engine);
- logical_ring_init_platform_invariants(engine);
logical_ring_default_vfuncs(engine);
logical_ring_default_irqs(engine);
}
@@ -2013,105 +1787,89 @@ static u32 intel_lr_indirect_ctx_offset(struct intel_engine_cs *engine)
return indirect_ctx_offset;
}
-static void execlists_init_reg_state(u32 *reg_state,
+static void execlists_init_reg_state(u32 *regs,
struct i915_gem_context *ctx,
struct intel_engine_cs *engine,
struct intel_ring *ring)
{
struct drm_i915_private *dev_priv = engine->i915;
struct i915_hw_ppgtt *ppgtt = ctx->ppgtt ?: dev_priv->mm.aliasing_ppgtt;
+ u32 base = engine->mmio_base;
+ bool rcs = engine->id == RCS;
+
+ /* A context is actually a big batch buffer with several
+ * MI_LOAD_REGISTER_IMM commands followed by (reg, value) pairs. The
+ * values we are setting here are only for the first context restore:
+ * on a subsequent save, the GPU will recreate this batchbuffer with new
+ * values (including all the missing MI_LOAD_REGISTER_IMM commands that
+ * we are not initializing here).
+ */
+ regs[CTX_LRI_HEADER_0] = MI_LOAD_REGISTER_IMM(rcs ? 14 : 11) |
+ MI_LRI_FORCE_POSTED;
+
+ CTX_REG(regs, CTX_CONTEXT_CONTROL, RING_CONTEXT_CONTROL(engine),
+ _MASKED_BIT_ENABLE(CTX_CTRL_INHIBIT_SYN_CTX_SWITCH |
+ CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT |
+ (HAS_RESOURCE_STREAMER(dev_priv) ?
+ CTX_CTRL_RS_CTX_ENABLE : 0)));
+ CTX_REG(regs, CTX_RING_HEAD, RING_HEAD(base), 0);
+ CTX_REG(regs, CTX_RING_TAIL, RING_TAIL(base), 0);
+ CTX_REG(regs, CTX_RING_BUFFER_START, RING_START(base), 0);
+ CTX_REG(regs, CTX_RING_BUFFER_CONTROL, RING_CTL(base),
+ RING_CTL_SIZE(ring->size) | RING_VALID);
+ CTX_REG(regs, CTX_BB_HEAD_U, RING_BBADDR_UDW(base), 0);
+ CTX_REG(regs, CTX_BB_HEAD_L, RING_BBADDR(base), 0);
+ CTX_REG(regs, CTX_BB_STATE, RING_BBSTATE(base), RING_BB_PPGTT);
+ CTX_REG(regs, CTX_SECOND_BB_HEAD_U, RING_SBBADDR_UDW(base), 0);
+ CTX_REG(regs, CTX_SECOND_BB_HEAD_L, RING_SBBADDR(base), 0);
+ CTX_REG(regs, CTX_SECOND_BB_STATE, RING_SBBSTATE(base), 0);
+ if (rcs) {
+ CTX_REG(regs, CTX_BB_PER_CTX_PTR, RING_BB_PER_CTX_PTR(base), 0);
+ CTX_REG(regs, CTX_RCS_INDIRECT_CTX, RING_INDIRECT_CTX(base), 0);
+ CTX_REG(regs, CTX_RCS_INDIRECT_CTX_OFFSET,
+ RING_INDIRECT_CTX_OFFSET(base), 0);
- /* A context is actually a big batch buffer with several MI_LOAD_REGISTER_IMM
- * commands followed by (reg, value) pairs. The values we are setting here are
- * only for the first context restore: on a subsequent save, the GPU will
- * recreate this batchbuffer with new values (including all the missing
- * MI_LOAD_REGISTER_IMM commands that we are not initializing here). */
- reg_state[CTX_LRI_HEADER_0] =
- MI_LOAD_REGISTER_IMM(engine->id == RCS ? 14 : 11) | MI_LRI_FORCE_POSTED;
- ASSIGN_CTX_REG(reg_state, CTX_CONTEXT_CONTROL,
- RING_CONTEXT_CONTROL(engine),
- _MASKED_BIT_ENABLE(CTX_CTRL_INHIBIT_SYN_CTX_SWITCH |
- CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT |
- (HAS_RESOURCE_STREAMER(dev_priv) ?
- CTX_CTRL_RS_CTX_ENABLE : 0)));
- ASSIGN_CTX_REG(reg_state, CTX_RING_HEAD, RING_HEAD(engine->mmio_base),
- 0);
- ASSIGN_CTX_REG(reg_state, CTX_RING_TAIL, RING_TAIL(engine->mmio_base),
- 0);
- ASSIGN_CTX_REG(reg_state, CTX_RING_BUFFER_START,
- RING_START(engine->mmio_base), 0);
- ASSIGN_CTX_REG(reg_state, CTX_RING_BUFFER_CONTROL,
- RING_CTL(engine->mmio_base),
- RING_CTL_SIZE(ring->size) | RING_VALID);
- ASSIGN_CTX_REG(reg_state, CTX_BB_HEAD_U,
- RING_BBADDR_UDW(engine->mmio_base), 0);
- ASSIGN_CTX_REG(reg_state, CTX_BB_HEAD_L,
- RING_BBADDR(engine->mmio_base), 0);
- ASSIGN_CTX_REG(reg_state, CTX_BB_STATE,
- RING_BBSTATE(engine->mmio_base),
- RING_BB_PPGTT);
- ASSIGN_CTX_REG(reg_state, CTX_SECOND_BB_HEAD_U,
- RING_SBBADDR_UDW(engine->mmio_base), 0);
- ASSIGN_CTX_REG(reg_state, CTX_SECOND_BB_HEAD_L,
- RING_SBBADDR(engine->mmio_base), 0);
- ASSIGN_CTX_REG(reg_state, CTX_SECOND_BB_STATE,
- RING_SBBSTATE(engine->mmio_base), 0);
- if (engine->id == RCS) {
- ASSIGN_CTX_REG(reg_state, CTX_BB_PER_CTX_PTR,
- RING_BB_PER_CTX_PTR(engine->mmio_base), 0);
- ASSIGN_CTX_REG(reg_state, CTX_RCS_INDIRECT_CTX,
- RING_INDIRECT_CTX(engine->mmio_base), 0);
- ASSIGN_CTX_REG(reg_state, CTX_RCS_INDIRECT_CTX_OFFSET,
- RING_INDIRECT_CTX_OFFSET(engine->mmio_base), 0);
if (engine->wa_ctx.vma) {
struct i915_ctx_workarounds *wa_ctx = &engine->wa_ctx;
u32 ggtt_offset = i915_ggtt_offset(wa_ctx->vma);
- reg_state[CTX_RCS_INDIRECT_CTX+1] =
- (ggtt_offset + wa_ctx->indirect_ctx.offset * sizeof(uint32_t)) |
- (wa_ctx->indirect_ctx.size / CACHELINE_DWORDS);
+ regs[CTX_RCS_INDIRECT_CTX + 1] =
+ (ggtt_offset + wa_ctx->indirect_ctx.offset) |
+ (wa_ctx->indirect_ctx.size / CACHELINE_BYTES);
- reg_state[CTX_RCS_INDIRECT_CTX_OFFSET+1] =
+ regs[CTX_RCS_INDIRECT_CTX_OFFSET + 1] =
intel_lr_indirect_ctx_offset(engine) << 6;
- reg_state[CTX_BB_PER_CTX_PTR+1] =
- (ggtt_offset + wa_ctx->per_ctx.offset * sizeof(uint32_t)) |
- 0x01;
+ regs[CTX_BB_PER_CTX_PTR + 1] =
+ (ggtt_offset + wa_ctx->per_ctx.offset) | 0x01;
}
}
- reg_state[CTX_LRI_HEADER_1] = MI_LOAD_REGISTER_IMM(9) | MI_LRI_FORCE_POSTED;
- ASSIGN_CTX_REG(reg_state, CTX_CTX_TIMESTAMP,
- RING_CTX_TIMESTAMP(engine->mmio_base), 0);
+
+ regs[CTX_LRI_HEADER_1] = MI_LOAD_REGISTER_IMM(9) | MI_LRI_FORCE_POSTED;
+
+ CTX_REG(regs, CTX_CTX_TIMESTAMP, RING_CTX_TIMESTAMP(base), 0);
/* PDP values well be assigned later if needed */
- ASSIGN_CTX_REG(reg_state, CTX_PDP3_UDW, GEN8_RING_PDP_UDW(engine, 3),
- 0);
- ASSIGN_CTX_REG(reg_state, CTX_PDP3_LDW, GEN8_RING_PDP_LDW(engine, 3),
- 0);
- ASSIGN_CTX_REG(reg_state, CTX_PDP2_UDW, GEN8_RING_PDP_UDW(engine, 2),
- 0);
- ASSIGN_CTX_REG(reg_state, CTX_PDP2_LDW, GEN8_RING_PDP_LDW(engine, 2),
- 0);
- ASSIGN_CTX_REG(reg_state, CTX_PDP1_UDW, GEN8_RING_PDP_UDW(engine, 1),
- 0);
- ASSIGN_CTX_REG(reg_state, CTX_PDP1_LDW, GEN8_RING_PDP_LDW(engine, 1),
- 0);
- ASSIGN_CTX_REG(reg_state, CTX_PDP0_UDW, GEN8_RING_PDP_UDW(engine, 0),
- 0);
- ASSIGN_CTX_REG(reg_state, CTX_PDP0_LDW, GEN8_RING_PDP_LDW(engine, 0),
- 0);
-
- if (ppgtt && USES_FULL_48BIT_PPGTT(ppgtt->base.dev)) {
+ CTX_REG(regs, CTX_PDP3_UDW, GEN8_RING_PDP_UDW(engine, 3), 0);
+ CTX_REG(regs, CTX_PDP3_LDW, GEN8_RING_PDP_LDW(engine, 3), 0);
+ CTX_REG(regs, CTX_PDP2_UDW, GEN8_RING_PDP_UDW(engine, 2), 0);
+ CTX_REG(regs, CTX_PDP2_LDW, GEN8_RING_PDP_LDW(engine, 2), 0);
+ CTX_REG(regs, CTX_PDP1_UDW, GEN8_RING_PDP_UDW(engine, 1), 0);
+ CTX_REG(regs, CTX_PDP1_LDW, GEN8_RING_PDP_LDW(engine, 1), 0);
+ CTX_REG(regs, CTX_PDP0_UDW, GEN8_RING_PDP_UDW(engine, 0), 0);
+ CTX_REG(regs, CTX_PDP0_LDW, GEN8_RING_PDP_LDW(engine, 0), 0);
+
+ if (ppgtt && i915_vm_is_48bit(&ppgtt->base)) {
/* 64b PPGTT (48bit canonical)
* PDP0_DESCRIPTOR contains the base address to PML4 and
* other PDP Descriptors are ignored.
*/
- ASSIGN_CTX_PML4(ppgtt, reg_state);
+ ASSIGN_CTX_PML4(ppgtt, regs);
}
- if (engine->id == RCS) {
- reg_state[CTX_LRI_HEADER_2] = MI_LOAD_REGISTER_IMM(1);
- ASSIGN_CTX_REG(reg_state, CTX_R_PWR_CLK_STATE, GEN8_R_PWR_CLK_STATE,
- make_rpcs(dev_priv));
+ if (rcs) {
+ regs[CTX_LRI_HEADER_2] = MI_LOAD_REGISTER_IMM(1);
+ CTX_REG(regs, CTX_R_PWR_CLK_STATE, GEN8_R_PWR_CLK_STATE,
+ make_rpcs(dev_priv));
}
}
@@ -2231,7 +1989,7 @@ static int execlists_context_deferred_alloc(struct i915_gem_context *ctx,
ce->ring = ring;
ce->state = vma;
- ce->initialised = engine->init_context == NULL;
+ ce->initialised |= engine->init_context == NULL;
return 0;
@@ -2279,7 +2037,6 @@ void intel_lr_context_resume(struct drm_i915_private *dev_priv)
i915_gem_object_unpin_map(ce->state->obj);
ce->ring->head = ce->ring->tail = 0;
- ce->ring->last_retired_head = -1;
intel_ring_update_space(ce->ring);
}
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.