drivers/gpu/drm/i915/intel_guc.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 DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  */
  24 #ifndef _INTEL_GUC_H_
  25 #define _INTEL_GUC_H_
  26
  27 #include "intel_guc_fwif.h"
  28 #include "i915_guc_reg.h"
  29 #include "intel_ringbuffer.h"
  30
  31 struct drm_i915_gem_request;
  32
  33 /*
  34  * This structure primarily describes the GEM object shared with the GuC.
  35  * The GEM object is held for the entire lifetime of our interaction with
  36  * the GuC, being allocated before the GuC is loaded with its firmware.
  37  * Because there's no way to update the address used by the GuC after
  38  * initialisation, the shared object must stay pinned into the GGTT as
  39  * long as the GuC is in use. We also keep the first page (only) mapped
  40  * into kernel address space, as it includes shared data that must be
  41  * updated on every request submission.
  42  *
  43  * The single GEM object described here is actually made up of several
  44  * separate areas, as far as the GuC is concerned. The first page (kept
  45  * kmap'd) includes the "process decriptor" which holds sequence data for
  46  * the doorbell, and one cacheline which actually *is* the doorbell; a
  47  * write to this will "ring the doorbell" (i.e. send an interrupt to the
  48  * GuC). The subsequent  pages of the client object constitute the work
  49  * queue (a circular array of work items), again described in the process
  50  * descriptor. Work queue pages are mapped momentarily as required.
  51  *
  52  * We also keep a few statistics on failures. Ideally, these should all
  53  * be zero!
  54  *   no_wq_space: times that the submission pre-check found no space was
  55  *                available in the work queue (note, the queue is shared,
  56  *                not per-engine). It is OK for this to be nonzero, but
  57  *                it should not be huge!
  58  *   q_fail: failed to enqueue a work item. This should never happen,
  59  *           because we check for space beforehand.
  60  *   b_fail: failed to ring the doorbell. This should never happen, unless
  61  *           somehow the hardware misbehaves, or maybe if the GuC firmware
  62  *           crashes? We probably need to reset the GPU to recover.
  63  *   retcode: errno from last guc_submit()
  64  */
  65 struct i915_guc_client {
  66         struct drm_i915_gem_object *client_obj;
  67         void *client_base;              /* first page (only) of above   */
  68         struct i915_gem_context *owner;
  69         struct intel_guc *guc;
  70         uint32_t priority;
  71         uint32_t ctx_index;
  72
  73         uint32_t proc_desc_offset;
  74         uint32_t doorbell_offset;
  75         uint32_t cookie;
  76         uint16_t doorbell_id;
  77         uint16_t padding;               /* Maintain alignment           */
  78
  79         uint32_t wq_offset;
  80         uint32_t wq_size;
  81         uint32_t wq_tail;
  82         uint32_t unused;                /* Was 'wq_head'                */
  83
  84         uint32_t no_wq_space;
  85         uint32_t q_fail;                /* No longer used               */
  86         uint32_t b_fail;
  87         int retcode;
  88
  89         /* Per-engine counts of GuC submissions */
  90         uint64_t submissions[I915_NUM_ENGINES];
  91 };
  92
  93 enum intel_guc_fw_status {
  94         GUC_FIRMWARE_FAIL = -1,
  95         GUC_FIRMWARE_NONE = 0,
  96         GUC_FIRMWARE_PENDING,
  97         GUC_FIRMWARE_SUCCESS
  98 };
  99
 100 /*
 101  * This structure encapsulates all the data needed during the process
 102  * of fetching, caching, and loading the firmware image into the GuC.
 103  */
 104 struct intel_guc_fw {
 105         struct drm_device *             guc_dev;
 106         const char *                    guc_fw_path;
 107         size_t                          guc_fw_size;
 108         struct drm_i915_gem_object *    guc_fw_obj;
 109         enum intel_guc_fw_status        guc_fw_fetch_status;
 110         enum intel_guc_fw_status        guc_fw_load_status;
 111
 112         uint16_t                        guc_fw_major_wanted;
 113         uint16_t                        guc_fw_minor_wanted;
 114         uint16_t                        guc_fw_major_found;
 115         uint16_t                        guc_fw_minor_found;
 116
 117         uint32_t header_size;
 118         uint32_t header_offset;
 119         uint32_t rsa_size;
 120         uint32_t rsa_offset;
 121         uint32_t ucode_size;
 122         uint32_t ucode_offset;
 123 };
 124
 125 struct intel_guc {
 126         struct intel_guc_fw guc_fw;
 127         uint32_t log_flags;
 128         struct drm_i915_gem_object *log_obj;
 129
 130         struct drm_i915_gem_object *ads_obj;
 131
 132         struct drm_i915_gem_object *ctx_pool_obj;
 133         struct ida ctx_ids;
 134
 135         struct i915_guc_client *execbuf_client;
 136
 137         DECLARE_BITMAP(doorbell_bitmap, GUC_MAX_DOORBELLS);
 138         uint32_t db_cacheline;          /* Cyclic counter mod pagesize  */
 139
 140         /* Action status & statistics */
 141         uint64_t action_count;          /* Total commands issued        */
 142         uint32_t action_cmd;            /* Last command word            */
 143         uint32_t action_status;         /* Last return status           */
 144         uint32_t action_fail;           /* Total number of failures     */
 145         int32_t action_err;             /* Last error code              */
 146
 147         uint64_t submissions[I915_NUM_ENGINES];
 148         uint32_t last_seqno[I915_NUM_ENGINES];
 149 };
 150
 151 /* intel_guc_loader.c */
 152 extern void intel_guc_init(struct drm_device *dev);
 153 extern int intel_guc_setup(struct drm_device *dev);
 154 extern void intel_guc_fini(struct drm_device *dev);
 155 extern const char *intel_guc_fw_status_repr(enum intel_guc_fw_status status);
 156 extern int intel_guc_suspend(struct drm_device *dev);
 157 extern int intel_guc_resume(struct drm_device *dev);
 158
 159 /* i915_guc_submission.c */
 160 int i915_guc_submission_init(struct drm_i915_private *dev_priv);
 161 int i915_guc_submission_enable(struct drm_i915_private *dev_priv);
 162 int i915_guc_wq_check_space(struct drm_i915_gem_request *rq);
 163 int i915_guc_submit(struct drm_i915_gem_request *rq);
 164 void i915_guc_submission_disable(struct drm_i915_private *dev_priv);
 165 void i915_guc_submission_fini(struct drm_i915_private *dev_priv);
 166
 167 #endif