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 #define GEN8_CSB_ENTRIES 6
  29 #define GEN8_CSB_PTR_MASK 0x07
  30
  31 /* Execlists regs */
  32 #define RING_ELSP(ring)                 ((ring)->mmio_base+0x230)
  33 #define RING_EXECLIST_STATUS_LO(ring)   ((ring)->mmio_base+0x234)
  34 #define RING_EXECLIST_STATUS_HI(ring)   ((ring)->mmio_base+0x234 + 4)
  35 #define RING_CONTEXT_CONTROL(ring)      ((ring)->mmio_base+0x244)
  36 #define   CTX_CTRL_INHIBIT_SYN_CTX_SWITCH       (1 << 3)
  37 #define   CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT   (1 << 0)
  38 #define   CTX_CTRL_RS_CTX_ENABLE                (1 << 1)
  39 #define RING_CONTEXT_STATUS_BUF_LO(ring, i)     ((ring)->mmio_base+0x370 + (i) * 8)
  40 #define RING_CONTEXT_STATUS_BUF_HI(ring, i)     ((ring)->mmio_base+0x370 + (i) * 8 + 4)
  41 #define RING_CONTEXT_STATUS_PTR(ring)   ((ring)->mmio_base+0x3a0)
  42
  43 /* Logical Rings */
  44 int intel_logical_ring_alloc_request_extras(struct drm_i915_gem_request *request);
  45 int intel_logical_ring_reserve_space(struct drm_i915_gem_request *request);
  46 void intel_logical_ring_stop(struct intel_engine_cs *ring);
  47 void intel_logical_ring_cleanup(struct intel_engine_cs *ring);
  48 int intel_logical_rings_init(struct drm_device *dev);
  49 int intel_logical_ring_begin(struct drm_i915_gem_request *req, int num_dwords);
  50
  51 int logical_ring_flush_all_caches(struct drm_i915_gem_request *req);
  52 /**
  53  * intel_logical_ring_advance() - advance the ringbuffer tail
  54  * @ringbuf: Ringbuffer to advance.
  55  *
  56  * The tail is only updated in our logical ringbuffer struct.
  57  */
  58 static inline void intel_logical_ring_advance(struct intel_ringbuffer *ringbuf)
  59 {
  60         ringbuf->tail &= ringbuf->size - 1;
  61 }
  62 /**
  63  * intel_logical_ring_emit() - write a DWORD to the ringbuffer.
  64  * @ringbuf: Ringbuffer to write to.
  65  * @data: DWORD to write.
  66  */
  67 static inline void intel_logical_ring_emit(struct intel_ringbuffer *ringbuf,
  68                                            u32 data)
  69 {
  70         iowrite32(data, ringbuf->virtual_start + ringbuf->tail);
  71         ringbuf->tail += 4;
  72 }
  73
  74 /* Logical Ring Contexts */
  75
  76 /* One extra page is added before LRC for GuC as shared data */
  77 #define LRC_GUCSHR_PN   (0)
  78 #define LRC_PPHWSP_PN   (LRC_GUCSHR_PN + 1)
  79 #define LRC_STATE_PN    (LRC_PPHWSP_PN + 1)
  80
  81 void intel_lr_context_free(struct intel_context *ctx);
  82 int intel_lr_context_deferred_alloc(struct intel_context *ctx,
  83                                     struct intel_engine_cs *ring);
  84 void intel_lr_context_unpin(struct drm_i915_gem_request *req);
  85 void intel_lr_context_reset(struct drm_device *dev,
  86                         struct intel_context *ctx);
  87 uint64_t intel_lr_context_descriptor(struct intel_context *ctx,
  88                                      struct intel_engine_cs *ring);
  89
  90 /* Execlists */
  91 int intel_sanitize_enable_execlists(struct drm_device *dev, int enable_execlists);
  92 struct i915_execbuffer_params;
  93 int intel_execlists_submission(struct i915_execbuffer_params *params,
  94                                struct drm_i915_gem_execbuffer2 *args,
  95                                struct list_head *vmas);
  96 u32 intel_execlists_ctx_id(struct drm_i915_gem_object *ctx_obj);
  97
  98 void intel_lrc_irq_handler(struct intel_engine_cs *ring);
  99 void intel_execlists_retire_requests(struct intel_engine_cs *ring);
 100
 101 #endif /* _INTEL_LRC_H_ */