diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gt/intel_renderstate.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_renderstate.c | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_renderstate.c b/drivers/gpu/drm/i915/gt/intel_renderstate.c new file mode 100644 index 000000000000..5121e6dc2fa5 --- /dev/null +++ b/drivers/gpu/drm/i915/gt/intel_renderstate.c @@ -0,0 +1,254 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2014 Intel Corporation + */ + +#include "gem/i915_gem_internal.h" + +#include "i915_drv.h" +#include "intel_renderstate.h" +#include "intel_context.h" +#include "intel_gpu_commands.h" +#include "intel_ring.h" + +static const struct intel_renderstate_rodata * +render_state_get_rodata(const struct intel_engine_cs *engine) +{ + if (engine->class != RENDER_CLASS) + return NULL; + + switch (GRAPHICS_VER(engine->i915)) { + case 6: + return &gen6_null_state; + case 7: + return &gen7_null_state; + case 8: + return &gen8_null_state; + case 9: + return &gen9_null_state; + } + + return NULL; +} + +/* + * Macro to add commands to auxiliary batch. + * This macro only checks for page overflow before inserting the commands, + * this is sufficient as the null state generator makes the final batch + * with two passes to build command and state separately. At this point + * the size of both are known and it compacts them by relocating the state + * right after the commands taking care of alignment so we should sufficient + * space below them for adding new commands. + */ +#define OUT_BATCH(batch, i, val) \ + do { \ + if ((i) >= PAGE_SIZE / sizeof(u32)) \ + goto out; \ + (batch)[(i)++] = (val); \ + } while (0) + +static int render_state_setup(struct intel_renderstate *so, + struct drm_i915_private *i915) +{ + const struct intel_renderstate_rodata *rodata = so->rodata; + unsigned int i = 0, reloc_index = 0; + int ret = -EINVAL; + u32 *d; + + d = i915_gem_object_pin_map(so->vma->obj, I915_MAP_WB); + if (IS_ERR(d)) + return PTR_ERR(d); + + while (i < rodata->batch_items) { + u32 s = rodata->batch[i]; + + if (i * 4 == rodata->reloc[reloc_index]) { + u64 r = s + so->vma->node.start; + + s = lower_32_bits(r); + if (HAS_64BIT_RELOC(i915)) { + if (i + 1 >= rodata->batch_items || + rodata->batch[i + 1] != 0) + goto out; + + d[i++] = s; + s = upper_32_bits(r); + } + + reloc_index++; + } + + d[i++] = s; + } + + if (rodata->reloc[reloc_index] != -1) { + drm_err(&i915->drm, "only %d relocs resolved\n", reloc_index); + goto out; + } + + so->batch_offset = i915_ggtt_offset(so->vma); + so->batch_size = rodata->batch_items * sizeof(u32); + + while (i % CACHELINE_DWORDS) + OUT_BATCH(d, i, MI_NOOP); + + so->aux_offset = i * sizeof(u32); + + if (HAS_POOLED_EU(i915)) { + /* + * We always program 3x6 pool config but depending upon which + * subslice is disabled HW drops down to appropriate config + * shown below. + * + * In the below table 2x6 config always refers to + * fused-down version, native 2x6 is not available and can + * be ignored + * + * SNo subslices config eu pool configuration + * ----------------------------------------------------------- + * 1 3 subslices enabled (3x6) - 0x00777000 (9+9) + * 2 ss0 disabled (2x6) - 0x00777000 (3+9) + * 3 ss1 disabled (2x6) - 0x00770000 (6+6) + * 4 ss2 disabled (2x6) - 0x00007000 (9+3) + */ + u32 eu_pool_config = 0x00777000; + + OUT_BATCH(d, i, GEN9_MEDIA_POOL_STATE); + OUT_BATCH(d, i, GEN9_MEDIA_POOL_ENABLE); + OUT_BATCH(d, i, eu_pool_config); + OUT_BATCH(d, i, 0); + OUT_BATCH(d, i, 0); + OUT_BATCH(d, i, 0); + } + + OUT_BATCH(d, i, MI_BATCH_BUFFER_END); + so->aux_size = i * sizeof(u32) - so->aux_offset; + so->aux_offset += so->batch_offset; + /* + * Since we are sending length, we need to strictly conform to + * all requirements. For Gen2 this must be a multiple of 8. + */ + so->aux_size = ALIGN(so->aux_size, 8); + + ret = 0; +out: + __i915_gem_object_flush_map(so->vma->obj, 0, i * sizeof(u32)); + __i915_gem_object_release_map(so->vma->obj); + return ret; +} + +#undef OUT_BATCH + +int intel_renderstate_init(struct intel_renderstate *so, + struct intel_context *ce) +{ + struct intel_engine_cs *engine = ce->engine; + struct drm_i915_gem_object *obj = NULL; + int err; + + memset(so, 0, sizeof(*so)); + + so->rodata = render_state_get_rodata(engine); + if (so->rodata) { + if (so->rodata->batch_items * 4 > PAGE_SIZE) + return -EINVAL; + + obj = i915_gem_object_create_internal(engine->i915, PAGE_SIZE); + if (IS_ERR(obj)) + return PTR_ERR(obj); + + so->vma = i915_vma_instance(obj, &engine->gt->ggtt->vm, NULL); + if (IS_ERR(so->vma)) { + err = PTR_ERR(so->vma); + goto err_obj; + } + } + + i915_gem_ww_ctx_init(&so->ww, true); +retry: + err = intel_context_pin_ww(ce, &so->ww); + if (err) + goto err_fini; + + /* return early if there's nothing to setup */ + if (!err && !so->rodata) + return 0; + + err = i915_gem_object_lock(so->vma->obj, &so->ww); + if (err) + goto err_context; + + err = i915_vma_pin_ww(so->vma, &so->ww, 0, 0, PIN_GLOBAL | PIN_HIGH); + if (err) + goto err_context; + + err = render_state_setup(so, engine->i915); + if (err) + goto err_unpin; + + return 0; + +err_unpin: + i915_vma_unpin(so->vma); +err_context: + intel_context_unpin(ce); +err_fini: + if (err == -EDEADLK) { + err = i915_gem_ww_ctx_backoff(&so->ww); + if (!err) + goto retry; + } + i915_gem_ww_ctx_fini(&so->ww); +err_obj: + if (obj) + i915_gem_object_put(obj); + so->vma = NULL; + return err; +} + +int intel_renderstate_emit(struct intel_renderstate *so, + struct i915_request *rq) +{ + struct intel_engine_cs *engine = rq->engine; + int err; + + if (!so->vma) + return 0; + + err = i915_request_await_object(rq, so->vma->obj, false); + if (err == 0) + err = i915_vma_move_to_active(so->vma, rq, 0); + if (err) + return err; + + err = engine->emit_bb_start(rq, + so->batch_offset, so->batch_size, + I915_DISPATCH_SECURE); + if (err) + return err; + + if (so->aux_size > 8) { + err = engine->emit_bb_start(rq, + so->aux_offset, so->aux_size, + I915_DISPATCH_SECURE); + if (err) + return err; + } + + return 0; +} + +void intel_renderstate_fini(struct intel_renderstate *so, + struct intel_context *ce) +{ + if (so->vma) { + i915_vma_unpin(so->vma); + i915_vma_close(so->vma); + } + + intel_context_unpin(ce); + i915_gem_ww_ctx_fini(&so->ww); + + if (so->vma) + i915_gem_object_put(so->vma->obj); +} |