// SPDX-License-Identifier: MIT
/*
* Copyright © 2020 Intel Corporation
*/
#include "gen2_engine_cs.h"
#include "i915_drv.h"
#include "i915_reg.h"
#include "intel_engine.h"
#include "intel_engine_regs.h"
#include "intel_gpu_commands.h"
#include "intel_gt.h"
#include "intel_gt_irq.h"
#include "intel_ring.h"
int gen2_emit_flush(struct i915_request *rq, u32 mode)
{
unsigned int num_store_dw = 12;
u32 cmd, *cs;
cmd = MI_FLUSH;
if (mode & EMIT_INVALIDATE)
cmd |= MI_READ_FLUSH;
cs = intel_ring_begin(rq, 2 + 4 * num_store_dw);
if (IS_ERR(cs))
return PTR_ERR(cs);
*cs++ = cmd;
while (num_store_dw--) {
*cs++ = MI_STORE_DWORD_INDEX;
*cs++ = I915_GEM_HWS_SCRATCH * sizeof(u32);
*cs++ = 0;
*cs++ = MI_FLUSH | MI_NO_WRITE_FLUSH;
}
*cs++ = cmd;
intel_ring_advance(rq, cs);
return 0;
}
int gen4_emit_flush_rcs(struct i915_request *rq, u32 mode)
{
u32 cmd, *cs;
int i;
/*
* 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) || GRAPHICS_VER(rq->i915) == 5)
cmd |= MI_INVALIDATE_ISP;
}
i = 2;
if (mode & EMIT_INVALIDATE)
i += 20;
cs = intel_ring_begin(rq, i);
if (IS_ERR(cs))
return PTR_ERR(cs);
*cs++ = cmd;
/*
* A random delay to let the CS invalidate take effect? Without this
* delay, the GPU relocation path fails as the CS does not see
* the updated contents. Just as important, if we apply the flushes
* to the EMIT_FLUSH branch (i.e. immediately after the relocation
* write and before the invalidate on the next batch), the relocations
* still fail. This implies that is a delay following invalidation
* that is required to reset the caches as opposed to a delay to
* ensure the memory is written.
*/
if (mode & EMIT_INVALIDATE) {
*cs++ = GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE;
*cs++ = intel_gt_scratch_offset(rq->engine->gt,
INTEL_GT_SCRATCH_FIELD_DEFAULT) |
PIPE_CONTROL_GLOBAL_GTT;
*cs++ = 0;
*cs++ = 0;
for (i = 0; i < 12; i++)
*cs++ = MI_FLUSH;
*cs++ = GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE;
*cs++ = intel_gt_scratch_offset(rq->engine->gt,
INTEL_GT_SCRATCH_FIELD_DEFAULT) |
PIPE_CONTROL_GLOBAL_GTT;
*cs++ = 0;
*cs++ = 0;
}
*cs++ = cmd;
intel_ring_advance(rq, cs);
return 0;
}
int gen4_emit_flush_vcs(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;
}
static u32 *__gen2_emit_breadcrumb(struct i915_request *rq, u32 *cs,
int flush, int post)
{
GEM_BUG_ON(i915_request_active_timeline(rq)->hwsp_ggtt != rq->engine->status_page.vma);
GEM_BUG_ON(offset_in_page(rq->hwsp_seqno) != I915_GEM_HWS_SEQNO_ADDR);
*cs++ = MI_FLUSH;
while (flush--) {
*cs++ = MI_STORE_DWORD_INDEX;
*cs++ = I915_GEM_HWS_SCRATCH * sizeof(u32);
*cs++ = rq->fence.seqno;
}
while (post--) {
*cs++ = MI_STORE_DWORD_INDEX;
*cs++ = I915_GEM_HWS_SEQNO_ADDR;
*cs++ = rq->fence.seqno;
}
*cs++ = MI_USER_INTERRUPT;
rq->tail = intel_ring_offset(rq, cs);
assert_ring_tail_valid(rq->ring, rq->tail);
return cs;
}
u32 *gen3_emit_breadcrumb(struct i915_request *rq, u32 *cs)
{
return __gen2_emit_breadcrumb(rq, cs, 16, 8);
}
u32 *gen5_emit_breadcrumb(struct i915_request *rq, u32 *cs)
{
return __gen2_emit_breadcrumb(rq, cs, 8, 8);
}
/* Just userspace ABI convention to limit the wa batch bo to a resonable size */
#define I830_BATCH_LIMIT SZ_256K
#define I830_TLB_ENTRIES (2)
#define I830_WA_SIZE max(I830_TLB_ENTRIES * SZ_4K, I830_BATCH_LIMIT)
int i830_emit_bb_start(struct i915_request *rq,
u64 offset, u32 len,
unsigned int dispatch_flags)
{
u32 *cs, cs_offset =
intel_gt_scratch_offset(rq->engine->gt,
INTEL_GT_SCRATCH_FIELD_DEFAULT);
GEM_BUG_ON(rq->engine->gt->scratch->size < I830_WA_SIZE);
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 | (6 - 2);
*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;
}
if (!(dispatch_flags & I915_DISPATCH_SECURE))
offset |= MI_BATCH_NON_SECURE;
cs = intel_ring_begin(rq, 2);
if (IS_ERR(cs))
return PTR_ERR(cs);
*cs++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT;
*cs++ = offset;
intel_ring_advance(rq, cs);
return 0;
}
int gen3_emit_bb_start(struct i915_request *rq,
u64 offset, u32 len,
unsigned int dispatch_flags)
{
u32 *cs;
if (!(dispatch_flags & I915_DISPATCH_SECURE))
offset |= MI_BATCH_NON_SECURE;
cs = intel_ring_begin(rq, 2);
if (IS_ERR(cs))
return PTR_ERR(cs);
*cs++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT;
*cs++ = offset;
intel_ring_advance(rq, cs);
return 0;
}
int gen4_emit_bb_start(struct i915_request *rq,
u64 offset, u32 length,
unsigned int dispatch_flags)
{
u32 security;
u32 *cs;
security = MI_BATCH_NON_SECURE_I965;
if (dispatch_flags & I915_DISPATCH_SECURE)
security = 0;
cs = intel_ring_begin(rq, 2);
if (IS_ERR(cs))
return PTR_ERR(cs);
*cs++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT | security;
*cs++ = offset;
intel_ring_advance(rq, cs);
return 0;
}
void gen2_irq_enable(struct intel_engine_cs *engine)
{
struct drm_i915_private *i915 = engine->i915;
i915->irq_mask &= ~engine->irq_enable_mask;
intel_uncore_write16(&i915->uncore, GEN2_IMR, i915->irq_mask);
ENGINE_POSTING_READ16(engine, RING_IMR);
}
void gen2_irq_disable(struct intel_engine_cs *engine)
{
struct drm_i915_private *i915 = engine->i915;
i915->irq_mask |= engine->irq_enable_mask;
intel_uncore_write16(&i915->uncore, GEN2_IMR, i915->irq_mask);
}
void gen3_irq_enable(struct intel_engine_cs *engine)
{
engine->i915->irq_mask &= ~engine->irq_enable_mask;
intel_uncore_write(engine->uncore, GEN2_IMR, engine->i915->irq_mask);
intel_uncore_posting_read_fw(engine->uncore, GEN2_IMR);
}
void gen3_irq_disable(struct intel_engine_cs *engine)
{
engine->i915->irq_mask |= engine->irq_enable_mask;
intel_uncore_write(engine->uncore, GEN2_IMR, engine->i915->irq_mask);
}
void gen5_irq_enable(struct intel_engine_cs *engine)
{
gen5_gt_enable_irq(engine->gt, engine->irq_enable_mask);
}
void gen5_irq_disable(struct intel_engine_cs *engine)
{
gen5_gt_disable_irq(engine->gt, engine->irq_enable_mask);
}
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