drivers/gpu/drm/i915/intel_lrc.h

   1 /*
   2  * Copyright © 2014 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #ifndef _INTEL_LRC_H_
  25 #define _INTEL_LRC_H_
  26
  27 #define GEN8_LR_CONTEXT_ALIGN 4096
  28
  29 /* Execlists regs */
  30 #define RING_ELSP(ring)                 ((ring)->mmio_base+0x230)
  31 #define RING_EXECLIST_STATUS_LO(ring)   ((ring)->mmio_base+0x234)
  32 #define RING_EXECLIST_STATUS_HI(ring)   ((ring)->mmio_base+0x234 + 4)
  33 #define RING_CONTEXT_CONTROL(ring)      ((ring)->mmio_base+0x244)
  34 #define   CTX_CTRL_INHIBIT_SYN_CTX_SWITCH       (1 << 3)
  35 #define   CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT   (1 << 0)
  36 #define   CTX_CTRL_RS_CTX_ENABLE                (1 << 1)
  37 #define RING_CONTEXT_STATUS_BUF_LO(ring, i)     ((ring)->mmio_base+0x370 + (i) * 8)
  38 #define RING_CONTEXT_STATUS_BUF_HI(ring, i)     ((ring)->mmio_base+0x370 + (i) * 8 + 4)
  39 #define RING_CONTEXT_STATUS_PTR(ring)   ((ring)->mmio_base+0x3a0)
  40
  41 /* Logical Rings */
  42 int intel_logical_ring_alloc_request_extras(struct drm_i915_gem_request *request);
  43 int intel_logical_ring_reserve_space(struct drm_i915_gem_request *request);
  44 void intel_logical_ring_stop(struct intel_engine_cs *ring);
  45 void intel_logical_ring_cleanup(struct intel_engine_cs *ring);
  46 int intel_logical_rings_init(struct drm_device *dev);
  47 int intel_logical_ring_begin(struct drm_i915_gem_request *req, int num_dwords);
  48
  49 int logical_ring_flush_all_caches(struct drm_i915_gem_request *req);
  50 /**
  51  * intel_logical_ring_advance() - advance the ringbuffer tail
  52  * @ringbuf: Ringbuffer to advance.
  53  *
  54  * The tail is only updated in our logical ringbuffer struct.
  55  */
  56 static inline void intel_logical_ring_advance(struct intel_ringbuffer *ringbuf)
  57 {
  58         ringbuf->tail &= ringbuf->size - 1;
  59 }
  60 /**
  61  * intel_logical_ring_emit() - write a DWORD to the ringbuffer.
  62  * @ringbuf: Ringbuffer to write to.
  63  * @data: DWORD to write.
  64  */
  65 static inline void intel_logical_ring_emit(struct intel_ringbuffer *ringbuf,
  66                                            u32 data)
  67 {
  68         iowrite32(data, ringbuf->virtual_start + ringbuf->tail);
  69         ringbuf->tail += 4;
  70 }
  71
  72 /* Logical Ring Contexts */
  73
  74 /* One extra page is added before LRC for GuC as shared data */
  75 #define LRC_GUCSHR_PN   (0)
  76 #define LRC_PPHWSP_PN   (LRC_GUCSHR_PN + 1)
  77 #define LRC_STATE_PN    (LRC_PPHWSP_PN + 1)
  78
  79 void intel_lr_context_free(struct intel_context *ctx);
  80 int intel_lr_context_deferred_alloc(struct intel_context *ctx,
  81                                     struct intel_engine_cs *ring);
  82 void intel_lr_context_unpin(struct drm_i915_gem_request *req);
  83 void intel_lr_context_reset(struct drm_device *dev,
  84                         struct intel_context *ctx);
  85 uint64_t intel_lr_context_descriptor(struct intel_context *ctx,
  86                                      struct intel_engine_cs *ring);
  87
  88 /* Execlists */
  89 int intel_sanitize_enable_execlists(struct drm_device *dev, int enable_execlists);
  90 struct i915_execbuffer_params;
  91 int intel_execlists_submission(struct i915_execbuffer_params *params,
  92                                struct drm_i915_gem_execbuffer2 *args,
  93                                struct list_head *vmas);
  94 u32 intel_execlists_ctx_id(struct drm_i915_gem_object *ctx_obj);
  95
  96 void intel_lrc_irq_handler(struct intel_engine_cs *ring);
  97 void intel_execlists_retire_requests(struct intel_engine_cs *ring);
  98
  99 #endif /* _INTEL_LRC_H_ */