forked from Minki/linux
0c7dd53b84
Any given ringbuffer is unequivocally tied to one context and one engine. By setting the appropriate pointers to them, the ringbuffer struct holds all the infromation you might need to submit a workload for processing, Execlists style. v2: Drop ring->ctx since that looks terribly ill-defined for legacy ringbuffer submission. Signed-off-by: Oscar Mateo <oscar.mateo@intel.com> (v1) Acked-by: Damien Lespiau <damien.lespiau@intel.com> (v2) Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
165 lines
4.6 KiB
C
165 lines
4.6 KiB
C
/*
|
|
* Copyright © 2014 Intel Corporation
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* IN THE SOFTWARE.
|
|
*
|
|
* Authors:
|
|
* Ben Widawsky <ben@bwidawsk.net>
|
|
* Michel Thierry <michel.thierry@intel.com>
|
|
* Thomas Daniel <thomas.daniel@intel.com>
|
|
* Oscar Mateo <oscar.mateo@intel.com>
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* GEN8 brings an expansion of the HW contexts: "Logical Ring Contexts".
|
|
* These expanded contexts enable a number of new abilities, especially
|
|
* "Execlists" (also implemented in this file).
|
|
*
|
|
* Execlists are the new method by which, on gen8+ hardware, workloads are
|
|
* submitted for execution (as opposed to the legacy, ringbuffer-based, method).
|
|
*/
|
|
|
|
#include <drm/drmP.h>
|
|
#include <drm/i915_drm.h>
|
|
#include "i915_drv.h"
|
|
|
|
#define GEN8_LR_CONTEXT_RENDER_SIZE (20 * PAGE_SIZE)
|
|
#define GEN8_LR_CONTEXT_OTHER_SIZE (2 * PAGE_SIZE)
|
|
|
|
#define GEN8_LR_CONTEXT_ALIGN 4096
|
|
|
|
int intel_sanitize_enable_execlists(struct drm_device *dev, int enable_execlists)
|
|
{
|
|
WARN_ON(i915.enable_ppgtt == -1);
|
|
|
|
if (enable_execlists == 0)
|
|
return 0;
|
|
|
|
if (HAS_LOGICAL_RING_CONTEXTS(dev) && USES_PPGTT(dev))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void intel_lr_context_free(struct intel_context *ctx)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < I915_NUM_RINGS; i++) {
|
|
struct drm_i915_gem_object *ctx_obj = ctx->engine[i].state;
|
|
struct intel_ringbuffer *ringbuf = ctx->engine[i].ringbuf;
|
|
|
|
if (ctx_obj) {
|
|
intel_destroy_ringbuffer_obj(ringbuf);
|
|
kfree(ringbuf);
|
|
i915_gem_object_ggtt_unpin(ctx_obj);
|
|
drm_gem_object_unreference(&ctx_obj->base);
|
|
}
|
|
}
|
|
}
|
|
|
|
static uint32_t get_lr_context_size(struct intel_engine_cs *ring)
|
|
{
|
|
int ret = 0;
|
|
|
|
WARN_ON(INTEL_INFO(ring->dev)->gen != 8);
|
|
|
|
switch (ring->id) {
|
|
case RCS:
|
|
ret = GEN8_LR_CONTEXT_RENDER_SIZE;
|
|
break;
|
|
case VCS:
|
|
case BCS:
|
|
case VECS:
|
|
case VCS2:
|
|
ret = GEN8_LR_CONTEXT_OTHER_SIZE;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int intel_lr_context_deferred_create(struct intel_context *ctx,
|
|
struct intel_engine_cs *ring)
|
|
{
|
|
struct drm_device *dev = ring->dev;
|
|
struct drm_i915_gem_object *ctx_obj;
|
|
uint32_t context_size;
|
|
struct intel_ringbuffer *ringbuf;
|
|
int ret;
|
|
|
|
WARN_ON(ctx->legacy_hw_ctx.rcs_state != NULL);
|
|
|
|
context_size = round_up(get_lr_context_size(ring), 4096);
|
|
|
|
ctx_obj = i915_gem_alloc_context_obj(dev, context_size);
|
|
if (IS_ERR(ctx_obj)) {
|
|
ret = PTR_ERR(ctx_obj);
|
|
DRM_DEBUG_DRIVER("Alloc LRC backing obj failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = i915_gem_obj_ggtt_pin(ctx_obj, GEN8_LR_CONTEXT_ALIGN, 0);
|
|
if (ret) {
|
|
DRM_DEBUG_DRIVER("Pin LRC backing obj failed: %d\n", ret);
|
|
drm_gem_object_unreference(&ctx_obj->base);
|
|
return ret;
|
|
}
|
|
|
|
ringbuf = kzalloc(sizeof(*ringbuf), GFP_KERNEL);
|
|
if (!ringbuf) {
|
|
DRM_DEBUG_DRIVER("Failed to allocate ringbuffer %s\n",
|
|
ring->name);
|
|
i915_gem_object_ggtt_unpin(ctx_obj);
|
|
drm_gem_object_unreference(&ctx_obj->base);
|
|
ret = -ENOMEM;
|
|
return ret;
|
|
}
|
|
|
|
ringbuf->ring = ring;
|
|
ringbuf->size = 32 * PAGE_SIZE;
|
|
ringbuf->effective_size = ringbuf->size;
|
|
ringbuf->head = 0;
|
|
ringbuf->tail = 0;
|
|
ringbuf->space = ringbuf->size;
|
|
ringbuf->last_retired_head = -1;
|
|
|
|
/* TODO: For now we put this in the mappable region so that we can reuse
|
|
* the existing ringbuffer code which ioremaps it. When we start
|
|
* creating many contexts, this will no longer work and we must switch
|
|
* to a kmapish interface.
|
|
*/
|
|
ret = intel_alloc_ringbuffer_obj(dev, ringbuf);
|
|
if (ret) {
|
|
DRM_DEBUG_DRIVER("Failed to allocate ringbuffer obj %s: %d\n",
|
|
ring->name, ret);
|
|
kfree(ringbuf);
|
|
i915_gem_object_ggtt_unpin(ctx_obj);
|
|
drm_gem_object_unreference(&ctx_obj->base);
|
|
return ret;
|
|
}
|
|
|
|
ctx->engine[ring->id].ringbuf = ringbuf;
|
|
ctx->engine[ring->id].state = ctx_obj;
|
|
|
|
return 0;
|
|
}
|