325 lines
8.3 KiB
C
325 lines
8.3 KiB
C
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// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2019 Intel Corporation
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*/
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#include <linux/list.h>
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#include <linux/list_sort.h>
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#include <linux/llist.h>
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#include "i915_drv.h"
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#include "intel_engine.h"
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#include "intel_engine_user.h"
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#include "intel_gt.h"
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#include "uc/intel_guc_submission.h"
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struct intel_engine_cs *
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intel_engine_lookup_user(struct drm_i915_private *i915, u8 class, u8 instance)
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{
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struct rb_node *p = i915->uabi_engines.rb_node;
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while (p) {
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struct intel_engine_cs *it =
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rb_entry(p, typeof(*it), uabi_node);
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if (class < it->uabi_class)
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p = p->rb_left;
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else if (class > it->uabi_class ||
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instance > it->uabi_instance)
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p = p->rb_right;
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else if (instance < it->uabi_instance)
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p = p->rb_left;
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else
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return it;
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}
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return NULL;
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}
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void intel_engine_add_user(struct intel_engine_cs *engine)
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{
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llist_add((struct llist_node *)&engine->uabi_node,
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(struct llist_head *)&engine->i915->uabi_engines);
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}
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static const u8 uabi_classes[] = {
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[RENDER_CLASS] = I915_ENGINE_CLASS_RENDER,
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[COPY_ENGINE_CLASS] = I915_ENGINE_CLASS_COPY,
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[VIDEO_DECODE_CLASS] = I915_ENGINE_CLASS_VIDEO,
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[VIDEO_ENHANCEMENT_CLASS] = I915_ENGINE_CLASS_VIDEO_ENHANCE,
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[COMPUTE_CLASS] = I915_ENGINE_CLASS_COMPUTE,
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};
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static int engine_cmp(void *priv, const struct list_head *A,
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const struct list_head *B)
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{
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const struct intel_engine_cs *a =
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container_of((struct rb_node *)A, typeof(*a), uabi_node);
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const struct intel_engine_cs *b =
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container_of((struct rb_node *)B, typeof(*b), uabi_node);
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if (uabi_classes[a->class] < uabi_classes[b->class])
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return -1;
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if (uabi_classes[a->class] > uabi_classes[b->class])
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return 1;
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if (a->instance < b->instance)
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return -1;
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if (a->instance > b->instance)
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return 1;
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return 0;
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}
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static struct llist_node *get_engines(struct drm_i915_private *i915)
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{
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return llist_del_all((struct llist_head *)&i915->uabi_engines);
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}
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static void sort_engines(struct drm_i915_private *i915,
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struct list_head *engines)
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{
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struct llist_node *pos, *next;
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llist_for_each_safe(pos, next, get_engines(i915)) {
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struct intel_engine_cs *engine =
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container_of((struct rb_node *)pos, typeof(*engine),
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uabi_node);
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list_add((struct list_head *)&engine->uabi_node, engines);
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}
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list_sort(NULL, engines, engine_cmp);
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}
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static void set_scheduler_caps(struct drm_i915_private *i915)
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{
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static const struct {
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u8 engine;
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u8 sched;
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} map[] = {
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#define MAP(x, y) { ilog2(I915_ENGINE_##x), ilog2(I915_SCHEDULER_CAP_##y) }
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MAP(HAS_PREEMPTION, PREEMPTION),
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MAP(HAS_SEMAPHORES, SEMAPHORES),
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MAP(SUPPORTS_STATS, ENGINE_BUSY_STATS),
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#undef MAP
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};
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struct intel_engine_cs *engine;
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u32 enabled, disabled;
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enabled = 0;
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disabled = 0;
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for_each_uabi_engine(engine, i915) { /* all engines must agree! */
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int i;
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if (engine->sched_engine->schedule)
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enabled |= (I915_SCHEDULER_CAP_ENABLED |
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I915_SCHEDULER_CAP_PRIORITY);
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else
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disabled |= (I915_SCHEDULER_CAP_ENABLED |
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I915_SCHEDULER_CAP_PRIORITY);
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if (intel_uc_uses_guc_submission(&to_gt(i915)->uc))
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enabled |= I915_SCHEDULER_CAP_STATIC_PRIORITY_MAP;
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for (i = 0; i < ARRAY_SIZE(map); i++) {
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if (engine->flags & BIT(map[i].engine))
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enabled |= BIT(map[i].sched);
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else
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disabled |= BIT(map[i].sched);
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}
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}
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i915->caps.scheduler = enabled & ~disabled;
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if (!(i915->caps.scheduler & I915_SCHEDULER_CAP_ENABLED))
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i915->caps.scheduler = 0;
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}
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const char *intel_engine_class_repr(u8 class)
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{
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static const char * const uabi_names[] = {
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[RENDER_CLASS] = "rcs",
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[COPY_ENGINE_CLASS] = "bcs",
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[VIDEO_DECODE_CLASS] = "vcs",
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[VIDEO_ENHANCEMENT_CLASS] = "vecs",
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[OTHER_CLASS] = "other",
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[COMPUTE_CLASS] = "ccs",
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};
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if (class >= ARRAY_SIZE(uabi_names) || !uabi_names[class])
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return "xxx";
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return uabi_names[class];
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}
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struct legacy_ring {
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struct intel_gt *gt;
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u8 class;
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u8 instance;
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};
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static int legacy_ring_idx(const struct legacy_ring *ring)
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{
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static const struct {
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u8 base, max;
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} map[] = {
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[RENDER_CLASS] = { RCS0, 1 },
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[COPY_ENGINE_CLASS] = { BCS0, 1 },
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[VIDEO_DECODE_CLASS] = { VCS0, I915_MAX_VCS },
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[VIDEO_ENHANCEMENT_CLASS] = { VECS0, I915_MAX_VECS },
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[COMPUTE_CLASS] = { CCS0, I915_MAX_CCS },
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};
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if (GEM_DEBUG_WARN_ON(ring->class >= ARRAY_SIZE(map)))
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return INVALID_ENGINE;
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if (GEM_DEBUG_WARN_ON(ring->instance >= map[ring->class].max))
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return INVALID_ENGINE;
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return map[ring->class].base + ring->instance;
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}
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static void add_legacy_ring(struct legacy_ring *ring,
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struct intel_engine_cs *engine)
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{
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if (engine->gt != ring->gt || engine->class != ring->class) {
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ring->gt = engine->gt;
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ring->class = engine->class;
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ring->instance = 0;
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}
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engine->legacy_idx = legacy_ring_idx(ring);
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if (engine->legacy_idx != INVALID_ENGINE)
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ring->instance++;
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}
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static void engine_rename(struct intel_engine_cs *engine, const char *name, u16 instance)
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{
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char old[sizeof(engine->name)];
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memcpy(old, engine->name, sizeof(engine->name));
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scnprintf(engine->name, sizeof(engine->name), "%s%u", name, instance);
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drm_dbg(&engine->i915->drm, "renamed %s to %s\n", old, engine->name);
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}
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void intel_engines_driver_register(struct drm_i915_private *i915)
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{
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struct legacy_ring ring = {};
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struct list_head *it, *next;
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struct rb_node **p, *prev;
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LIST_HEAD(engines);
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sort_engines(i915, &engines);
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prev = NULL;
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p = &i915->uabi_engines.rb_node;
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list_for_each_safe(it, next, &engines) {
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struct intel_engine_cs *engine =
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container_of((struct rb_node *)it, typeof(*engine),
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uabi_node);
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if (intel_gt_has_unrecoverable_error(engine->gt))
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continue; /* ignore incomplete engines */
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/*
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* We don't want to expose the GSC engine to the users, but we
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* still rename it so it is easier to identify in the debug logs
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*/
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if (engine->id == GSC0) {
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engine_rename(engine, "gsc", 0);
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continue;
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}
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GEM_BUG_ON(engine->class >= ARRAY_SIZE(uabi_classes));
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engine->uabi_class = uabi_classes[engine->class];
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GEM_BUG_ON(engine->uabi_class >=
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ARRAY_SIZE(i915->engine_uabi_class_count));
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engine->uabi_instance =
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i915->engine_uabi_class_count[engine->uabi_class]++;
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/* Replace the internal name with the final user facing name */
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engine_rename(engine,
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intel_engine_class_repr(engine->class),
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engine->uabi_instance);
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rb_link_node(&engine->uabi_node, prev, p);
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rb_insert_color(&engine->uabi_node, &i915->uabi_engines);
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GEM_BUG_ON(intel_engine_lookup_user(i915,
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engine->uabi_class,
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engine->uabi_instance) != engine);
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/* Fix up the mapping to match default execbuf::user_map[] */
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add_legacy_ring(&ring, engine);
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prev = &engine->uabi_node;
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p = &prev->rb_right;
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}
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if (IS_ENABLED(CONFIG_DRM_I915_SELFTESTS) &&
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IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)) {
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struct intel_engine_cs *engine;
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unsigned int isolation;
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int class, inst;
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int errors = 0;
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for (class = 0; class < ARRAY_SIZE(i915->engine_uabi_class_count); class++) {
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for (inst = 0; inst < i915->engine_uabi_class_count[class]; inst++) {
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engine = intel_engine_lookup_user(i915,
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class, inst);
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if (!engine) {
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pr_err("UABI engine not found for { class:%d, instance:%d }\n",
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class, inst);
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errors++;
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continue;
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}
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if (engine->uabi_class != class ||
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engine->uabi_instance != inst) {
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pr_err("Wrong UABI engine:%s { class:%d, instance:%d } found for { class:%d, instance:%d }\n",
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engine->name,
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engine->uabi_class,
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engine->uabi_instance,
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class, inst);
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errors++;
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continue;
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}
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}
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}
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/*
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* Make sure that classes with multiple engine instances all
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* share the same basic configuration.
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*/
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isolation = intel_engines_has_context_isolation(i915);
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for_each_uabi_engine(engine, i915) {
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unsigned int bit = BIT(engine->uabi_class);
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unsigned int expected = engine->default_state ? bit : 0;
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if ((isolation & bit) != expected) {
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pr_err("mismatching default context state for class %d on engine %s\n",
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engine->uabi_class, engine->name);
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errors++;
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}
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}
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if (drm_WARN(&i915->drm, errors,
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"Invalid UABI engine mapping found"))
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i915->uabi_engines = RB_ROOT;
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}
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set_scheduler_caps(i915);
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}
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unsigned int intel_engines_has_context_isolation(struct drm_i915_private *i915)
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{
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struct intel_engine_cs *engine;
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unsigned int which;
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which = 0;
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for_each_uabi_engine(engine, i915)
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if (engine->default_state)
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which |= BIT(engine->uabi_class);
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return which;
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}
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