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drm/i915: Rename engines to match their user interface

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During engine setup, we may find that some engines are fused off causing
a misalignment between internal names and the instances seen by users,
e.g. (I915_ENGINE_CLASS_VIDEO_DECODE, 1) may be vcs2 in hardware.
Normally this is invisible to the user, but a few debug interfaces (and
our own internal tracing) use the original HW name not the name the user
would expect as formed from their class:instance tuple. Replace our
internal name with the uabi name for consistency with, for example, error
states.

v2: Keep the pretty printing of class name in the selftest

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111311
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190807110431.8130-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-08-07 12:04:31 +01:00
parent fdde309748
commit 2edda80db3
4 changed files with 51 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
drivers/gpu/drm/i915/gt/intel_engine_cs.c
View File

@ -55,30 +55,6 @@
#define GEN8_LR_CONTEXT_OTHER_SIZE ( 2 * PAGE_SIZE)
struct engine_class_info {
const char *name;
u8 uabi_class;
};
static const struct engine_class_info intel_engine_classes[] = {
[RENDER_CLASS] = {
.name = "rcs",
.uabi_class = I915_ENGINE_CLASS_RENDER,
},
[COPY_ENGINE_CLASS] = {
.name = "bcs",
.uabi_class = I915_ENGINE_CLASS_COPY,
},
[VIDEO_DECODE_CLASS] = {
.name = "vcs",
.uabi_class = I915_ENGINE_CLASS_VIDEO,
},
[VIDEO_ENHANCEMENT_CLASS] = {
.name = "vecs",
.uabi_class = I915_ENGINE_CLASS_VIDEO_ENHANCE,
},
};
#define MAX_MMIO_BASES 3
struct engine_info {
unsigned int hw_id;
@ -259,11 +235,16 @@ static u32 __engine_mmio_base(struct drm_i915_private *i915,
return bases[i].base;
}
static void __sprint_engine_name(char *name, const struct engine_info *info)
static void __sprint_engine_name(struct intel_engine_cs *engine)
{
WARN_ON(snprintf(name, INTEL_ENGINE_CS_MAX_NAME, "%s%u",
intel_engine_classes[info->class].name,
info->instance) >= INTEL_ENGINE_CS_MAX_NAME);
/*
* Before we know what the uABI name for this engine will be,
* we still would like to keep track of this engine in the debug logs.
* We throw in a ' here as a reminder that this isn't its final name.
*/
GEM_WARN_ON(snprintf(engine->name, sizeof(engine->name), "%s'%u",
intel_engine_class_repr(engine->class),
engine->instance) >= sizeof(engine->name));
}
void intel_engine_set_hwsp_writemask(struct intel_engine_cs *engine, u32 mask)
@ -292,8 +273,6 @@ static int intel_engine_setup(struct intel_gt *gt, enum intel_engine_id id)
const struct engine_info *info = &intel_engines[id];
struct intel_engine_cs *engine;
GEM_BUG_ON(info->class >= ARRAY_SIZE(intel_engine_classes));
BUILD_BUG_ON(MAX_ENGINE_CLASS >= BIT(GEN11_ENGINE_CLASS_WIDTH));
BUILD_BUG_ON(MAX_ENGINE_INSTANCE >= BIT(GEN11_ENGINE_INSTANCE_WIDTH));
@ -317,11 +296,12 @@ static int intel_engine_setup(struct intel_gt *gt, enum intel_engine_id id)
engine->i915 = gt->i915;
engine->gt = gt;
engine->uncore = gt->uncore;
__sprint_engine_name(engine->name, info);
engine->hw_id = engine->guc_id = info->hw_id;
engine->mmio_base = __engine_mmio_base(gt->i915, info->mmio_bases);
engine->class = info->class;
engine->instance = info->instance;
__sprint_engine_name(engine);
/*
* To be overridden by the backend on setup. However to facilitate

23
drivers/gpu/drm/i915/gt/intel_engine_user.c
View File

@ -127,6 +127,21 @@ static void set_scheduler_caps(struct drm_i915_private *i915)
i915->caps.scheduler = 0;
}
const char *intel_engine_class_repr(u8 class)
{
static const char * const uabi_names[] = {
[RENDER_CLASS] = "rcs",
[COPY_ENGINE_CLASS] = "bcs",
[VIDEO_DECODE_CLASS] = "vcs",
[VIDEO_ENHANCEMENT_CLASS] = "vecs",
};
if (class >= ARRAY_SIZE(uabi_names) || !uabi_names[class])
return "xxx";
return uabi_names[class];
}
void intel_engines_driver_register(struct drm_i915_private *i915)
{
u8 uabi_instances[4] = {};
@ -142,6 +157,7 @@ void intel_engines_driver_register(struct drm_i915_private *i915)
struct intel_engine_cs *engine =
container_of((struct rb_node *)it, typeof(*engine),
uabi_node);
char old[sizeof(engine->name)];
GEM_BUG_ON(engine->class >= ARRAY_SIZE(uabi_classes));
engine->uabi_class = uabi_classes[engine->class];
@ -149,6 +165,13 @@ void intel_engines_driver_register(struct drm_i915_private *i915)
GEM_BUG_ON(engine->uabi_class >= ARRAY_SIZE(uabi_instances));
engine->uabi_instance = uabi_instances[engine->uabi_class]++;
/* Replace the internal name with the final user facing name */
memcpy(old, engine->name, sizeof(engine->name));
scnprintf(engine->name, sizeof(engine->name), "%s%u",
intel_engine_class_repr(engine->class),
engine->uabi_instance);
DRM_DEBUG_DRIVER("renamed %s to %s\n", old, engine->name);
rb_link_node(&engine->uabi_node, prev, p);
rb_insert_color(&engine->uabi_node, &i915->uabi_engines);

2
drivers/gpu/drm/i915/gt/intel_engine_user.h
View File

@ -20,4 +20,6 @@ unsigned int intel_engines_has_context_isolation(struct drm_i915_private *i915);
void intel_engine_add_user(struct intel_engine_cs *engine);
void intel_engines_driver_register(struct drm_i915_private *i915);
const char *intel_engine_class_repr(u8 class);
#endif /* INTEL_ENGINE_USER_H */

26
drivers/gpu/drm/i915/gt/selftest_engine_cs.c
View File

@ -12,19 +12,18 @@ static int intel_mmio_bases_check(void *arg)
for (i = 0; i < ARRAY_SIZE(intel_engines); i++) {
const struct engine_info *info = &intel_engines[i];
char name[INTEL_ENGINE_CS_MAX_NAME];
u8 prev = U8_MAX;
__sprint_engine_name(name, info);
for (j = 0; j < MAX_MMIO_BASES; j++) {
u8 gen = info->mmio_bases[j].gen;
u32 base = info->mmio_bases[j].base;
if (gen >= prev) {
pr_err("%s: %s: mmio base for gen %x "
"is before the one for gen %x\n",
__func__, name, prev, gen);
pr_err("%s(%s, class:%d, instance:%d): mmio base for gen %x is before the one for gen %x\n",
__func__,
intel_engine_class_repr(info->class),
info->class, info->instance,
prev, gen);
return -EINVAL;
}
@ -32,17 +31,22 @@ static int intel_mmio_bases_check(void *arg)
break;
if (!base) {
pr_err("%s: %s: invalid mmio base (%x) "
"for gen %x at entry %u\n",
__func__, name, base, gen, j);
pr_err("%s(%s, class:%d, instance:%d): invalid mmio base (%x) for gen %x at entry %u\n",
__func__,
intel_engine_class_repr(info->class),
info->class, info->instance,
base, gen, j);
return -EINVAL;
}
prev = gen;
}
pr_info("%s: min gen supported for %s = %d\n",
__func__, name, prev);
pr_debug("%s: min gen supported for %s%d is %d\n",
__func__,
intel_engine_class_repr(info->class),
info->instance,
prev);
}
return 0;