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/*
* 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.
*/
#ifndef _INTEL_LRC_H_
#define _INTEL_LRC_H_
/* Execlists regs */
#define RING_ELSP(ring) ((ring)->mmio_base+0x230)
#define RING_EXECLIST_STATUS(ring) ((ring)->mmio_base+0x234)
#define RING_CONTEXT_CONTROL(ring) ((ring)->mmio_base+0x244)
#define RING_CONTEXT_STATUS_BUF(ring) ((ring)->mmio_base+0x370)
#define RING_CONTEXT_STATUS_PTR(ring) ((ring)->mmio_base+0x3a0)
/* Logical Rings */
void intel_logical_ring_stop(struct intel_engine_cs *ring);
void intel_logical_ring_cleanup(struct intel_engine_cs *ring);
int intel_logical_rings_init(struct drm_device *dev);
int logical_ring_flush_all_caches(struct intel_ringbuffer *ringbuf);
void intel_logical_ring_advance_and_submit(struct intel_ringbuffer *ringbuf);
/**
* intel_logical_ring_advance() - advance the ringbuffer tail
* @ringbuf: Ringbuffer to advance.
*
* The tail is only updated in our logical ringbuffer struct.
*/
static inline void intel_logical_ring_advance(struct intel_ringbuffer *ringbuf)
{
ringbuf->tail &= ringbuf->size - 1;
}
/**
* intel_logical_ring_emit() - write a DWORD to the ringbuffer.
* @ringbuf: Ringbuffer to write to.
* @data: DWORD to write.
*/
static inline void intel_logical_ring_emit(struct intel_ringbuffer *ringbuf,
u32 data)
{
iowrite32(data, ringbuf->virtual_start + ringbuf->tail);
ringbuf->tail += 4;
}
int intel_logical_ring_begin(struct intel_ringbuffer *ringbuf, int num_dwords);
/* Logical Ring Contexts */
void intel_lr_context_free(struct intel_context *ctx);
int intel_lr_context_deferred_create(struct intel_context *ctx,
struct intel_engine_cs *ring);
/* Execlists */
int intel_sanitize_enable_execlists(struct drm_device *dev, int enable_execlists);
int intel_execlists_submission(struct drm_device *dev, struct drm_file *file,
struct intel_engine_cs *ring,
struct intel_context *ctx,
struct drm_i915_gem_execbuffer2 *args,
struct list_head *vmas,
struct drm_i915_gem_object *batch_obj,
u64 exec_start, u32 flags);
u32 intel_execlists_ctx_id(struct drm_i915_gem_object *ctx_obj);
/**
* struct intel_ctx_submit_request - queued context submission request
* @ctx: Context to submit to the ELSP.
* @ring: Engine to submit it to.
* @tail: how far in the context's ringbuffer this request goes to.
* @execlist_link: link in the submission queue.
* @work: workqueue for processing this request in a bottom half.
* @elsp_submitted: no. of times this request has been sent to the ELSP.
*
* The ELSP only accepts two elements at a time, so we queue context/tail
* pairs on a given queue (ring->execlist_queue) until the hardware is
* available. The queue serves a double purpose: we also use it to keep track
* of the up to 2 contexts currently in the hardware (usually one in execution
* and the other queued up by the GPU): We only remove elements from the head
* of the queue when the hardware informs us that an element has been
* completed.
*
* All accesses to the queue are mediated by a spinlock (ring->execlist_lock).
*/
struct intel_ctx_submit_request {
struct intel_context *ctx;
struct intel_engine_cs *ring;
u32 tail;
struct list_head execlist_link;
struct work_struct work;
int elsp_submitted;
};
void intel_execlists_handle_ctx_events(struct intel_engine_cs *ring);
#endif /* _INTEL_LRC_H_ */
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