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 #include "intel_ringbuffer.h"
  28
  29 #define GEN8_LR_CONTEXT_ALIGN I915_GTT_MIN_ALIGNMENT
  30
  31 /* Execlists regs */
  32 #define RING_ELSP(engine)                       _MMIO((engine)->mmio_base + 0x230)
  33 #define RING_EXECLIST_STATUS_LO(engine)         _MMIO((engine)->mmio_base + 0x234)
  34 #define RING_EXECLIST_STATUS_HI(engine)         _MMIO((engine)->mmio_base + 0x234 + 4)
  35 #define RING_CONTEXT_CONTROL(engine)            _MMIO((engine)->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_BASE(engine)    _MMIO((engine)->mmio_base + 0x370)
  40 #define RING_CONTEXT_STATUS_BUF_LO(engine, i)   _MMIO((engine)->mmio_base + 0x370 + (i) * 8)
  41 #define RING_CONTEXT_STATUS_BUF_HI(engine, i)   _MMIO((engine)->mmio_base + 0x370 + (i) * 8 + 4)
  42 #define RING_CONTEXT_STATUS_PTR(engine)         _MMIO((engine)->mmio_base + 0x3a0)
  43
  44 /* The docs specify that the write pointer wraps around after 5h, "After status
  45  * is written out to the last available status QW at offset 5h, this pointer
  46  * wraps to 0."
  47  *
  48  * Therefore, one must infer than even though there are 3 bits available, 6 and
  49  * 7 appear to be * reserved.
  50  */
  51 #define GEN8_CSB_ENTRIES 6
  52 #define GEN8_CSB_PTR_MASK 0x7
  53 #define GEN8_CSB_READ_PTR_MASK (GEN8_CSB_PTR_MASK << 8)
  54 #define GEN8_CSB_WRITE_PTR_MASK (GEN8_CSB_PTR_MASK << 0)
  55 #define GEN8_CSB_WRITE_PTR(csb_status) \
  56         (((csb_status) & GEN8_CSB_WRITE_PTR_MASK) >> 0)
  57 #define GEN8_CSB_READ_PTR(csb_status) \
  58         (((csb_status) & GEN8_CSB_READ_PTR_MASK) >> 8)
  59
  60 enum {
  61         INTEL_CONTEXT_SCHEDULE_IN = 0,
  62         INTEL_CONTEXT_SCHEDULE_OUT,
  63 };
  64
  65 /* Logical Rings */
  66 void intel_logical_ring_cleanup(struct intel_engine_cs *engine);
  67 int logical_render_ring_init(struct intel_engine_cs *engine);
  68 int logical_xcs_ring_init(struct intel_engine_cs *engine);
  69
  70 /* Logical Ring Contexts */
  71
  72 /* One extra page is added before LRC for GuC as shared data */
  73 #define LRC_GUCSHR_PN   (0)
  74 #define LRC_PPHWSP_PN   (LRC_GUCSHR_PN + 1)
  75 #define LRC_STATE_PN    (LRC_PPHWSP_PN + 1)
  76
  77 struct drm_i915_private;
  78 struct i915_gem_context;
  79
  80 void intel_lr_context_resume(struct drm_i915_private *dev_priv);
  81 uint64_t intel_lr_context_descriptor(struct i915_gem_context *ctx,
  82                                      struct intel_engine_cs *engine);
  83
  84 /* Execlists */
  85 int intel_sanitize_enable_execlists(struct drm_i915_private *dev_priv,
  86                                     int enable_execlists);
  87
  88 #endif /* _INTEL_LRC_H_ */