drivers/gpu/drm/vmwgfx/vmwgfx_validation.h

   1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
   2 /**************************************************************************
   3  *
   4  * Copyright © 2018 VMware, Inc., Palo Alto, CA., USA
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  22  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  23  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  24  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  25  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  **************************************************************************/
  28 #ifndef _VMWGFX_VALIDATION_H_
  29 #define _VMWGFX_VALIDATION_H_
  30
  31 #include <linux/list.h>
  32 #include <linux/ww_mutex.h>
  33
  34 #include <drm/drm_hashtab.h>
  35 #include <drm/ttm/ttm_execbuf_util.h>
  36
  37 #define VMW_RES_DIRTY_NONE 0
  38 #define VMW_RES_DIRTY_SET BIT(0)
  39 #define VMW_RES_DIRTY_CLEAR BIT(1)
  40
  41 /**
  42  * struct vmw_validation_mem - Custom interface to provide memory reservations
  43  * for the validation code.
  44  * @reserve_mem: Callback to reserve memory
  45  * @unreserve_mem: Callback to unreserve memory
  46  * @gran: Reservation granularity. Contains a hint how much memory should
  47  * be reserved in each call to @reserve_mem(). A slow implementation may want
  48  * reservation to be done in large batches.
  49  */
  50 struct vmw_validation_mem {
  51         int (*reserve_mem)(struct vmw_validation_mem *m, size_t size);
  52         void (*unreserve_mem)(struct vmw_validation_mem *m, size_t size);
  53         size_t gran;
  54 };
  55
  56 /**
  57  * struct vmw_validation_context - Per command submission validation context
  58  * @ht: Hash table used to find resource- or buffer object duplicates
  59  * @resource_list: List head for resource validation metadata
  60  * @resource_ctx_list: List head for resource validation metadata for
  61  * resources that need to be validated before those in @resource_list
  62  * @bo_list: List head for buffer objects
  63  * @page_list: List of pages used by the memory allocator
  64  * @ticket: Ticked used for ww mutex locking
  65  * @res_mutex: Pointer to mutex used for resource reserving
  66  * @merge_dups: Whether to merge metadata for duplicate resources or
  67  * buffer objects
  68  * @mem_size_left: Free memory left in the last page in @page_list
  69  * @page_address: Kernel virtual address of the last page in @page_list
  70  * @vm: A pointer to the memory reservation interface or NULL if no
  71  * memory reservation is needed.
  72  * @vm_size_left: Amount of reserved memory that so far has not been allocated.
  73  * @total_mem: Amount of reserved memory.
  74  */
  75 struct vmw_validation_context {
  76         struct drm_open_hash *ht;
  77         struct list_head resource_list;
  78         struct list_head resource_ctx_list;
  79         struct list_head bo_list;
  80         struct list_head page_list;
  81         struct ww_acquire_ctx ticket;
  82         struct mutex *res_mutex;
  83         unsigned int merge_dups;
  84         unsigned int mem_size_left;
  85         u8 *page_address;
  86         struct vmw_validation_mem *vm;
  87         size_t vm_size_left;
  88         size_t total_mem;
  89 };
  90
  91 struct vmw_buffer_object;
  92 struct vmw_resource;
  93 struct vmw_fence_obj;
  94
  95 #if 0
  96 /**
  97  * DECLARE_VAL_CONTEXT - Declare a validation context with initialization
  98  * @_name: The name of the variable
  99  * @_ht: The hash table used to find dups or NULL if none
 100  * @_merge_dups: Whether to merge duplicate buffer object- or resource
 101  * entries. If set to true, ideally a hash table pointer should be supplied
 102  * as well unless the number of resources and buffer objects per validation
 103  * is known to be very small
 104  */
 105 #endif
 106 #define DECLARE_VAL_CONTEXT(_name, _ht, _merge_dups)                    \
 107         struct vmw_validation_context _name =                           \
 108         { .ht = _ht,                                                    \
 109           .resource_list = LIST_HEAD_INIT((_name).resource_list),       \
 110           .resource_ctx_list = LIST_HEAD_INIT((_name).resource_ctx_list), \
 111           .bo_list = LIST_HEAD_INIT((_name).bo_list),                   \
 112           .page_list = LIST_HEAD_INIT((_name).page_list),               \
 113           .res_mutex = NULL,                                            \
 114           .merge_dups = _merge_dups,                                    \
 115           .mem_size_left = 0,                                           \
 116         }
 117
 118 /**
 119  * vmw_validation_has_bos - return whether the validation context has
 120  * any buffer objects registered.
 121  *
 122  * @ctx: The validation context
 123  * Returns: Whether any buffer objects are registered
 124  */
 125 static inline bool
 126 vmw_validation_has_bos(struct vmw_validation_context *ctx)
 127 {
 128         return !list_empty(&ctx->bo_list);
 129 }
 130
 131 /**
 132  * vmw_validation_set_val_mem - Register a validation mem object for
 133  * validation memory reservation
 134  * @ctx: The validation context
 135  * @vm: Pointer to a struct vmw_validation_mem
 136  *
 137  * Must be set before the first attempt to allocate validation memory.
 138  */
 139 static inline void
 140 vmw_validation_set_val_mem(struct vmw_validation_context *ctx,
 141                            struct vmw_validation_mem *vm)
 142 {
 143         ctx->vm = vm;
 144 }
 145
 146 /**
 147  * vmw_validation_set_ht - Register a hash table for duplicate finding
 148  * @ctx: The validation context
 149  * @ht: Pointer to a hash table to use for duplicate finding
 150  * This function is intended to be used if the hash table wasn't
 151  * available at validation context declaration time
 152  */
 153 static inline void vmw_validation_set_ht(struct vmw_validation_context *ctx,
 154                                          struct drm_open_hash *ht)
 155 {
 156         ctx->ht = ht;
 157 }
 158
 159 /**
 160  * vmw_validation_bo_reserve - Reserve buffer objects registered with a
 161  * validation context
 162  * @ctx: The validation context
 163  * @intr: Perform waits interruptible
 164  *
 165  * Return: Zero on success, -ERESTARTSYS when interrupted, negative error
 166  * code on failure
 167  */
 168 static inline int
 169 vmw_validation_bo_reserve(struct vmw_validation_context *ctx,
 170                           bool intr)
 171 {
 172         return ttm_eu_reserve_buffers(&ctx->ticket, &ctx->bo_list, intr,
 173                                       NULL);
 174 }
 175
 176 /**
 177  * vmw_validation_bo_fence - Unreserve and fence buffer objects registered
 178  * with a validation context
 179  * @ctx: The validation context
 180  *
 181  * This function unreserves the buffer objects previously reserved using
 182  * vmw_validation_bo_reserve, and fences them with a fence object.
 183  */
 184 static inline void
 185 vmw_validation_bo_fence(struct vmw_validation_context *ctx,
 186                         struct vmw_fence_obj *fence)
 187 {
 188         ttm_eu_fence_buffer_objects(&ctx->ticket, &ctx->bo_list,
 189                                     (void *) fence);
 190 }
 191
 192 /**
 193  * vmw_validation_context_init - Initialize a validation context
 194  * @ctx: Pointer to the validation context to initialize
 195  *
 196  * This function initializes a validation context with @merge_dups set
 197  * to false
 198  */
 199 static inline void
 200 vmw_validation_context_init(struct vmw_validation_context *ctx)
 201 {
 202         memset(ctx, 0, sizeof(*ctx));
 203         INIT_LIST_HEAD(&ctx->resource_list);
 204         INIT_LIST_HEAD(&ctx->resource_ctx_list);
 205         INIT_LIST_HEAD(&ctx->bo_list);
 206 }
 207
 208 /**
 209  * vmw_validation_align - Align a validation memory allocation
 210  * @val: The size to be aligned
 211  *
 212  * Returns: @val aligned to the granularity used by the validation memory
 213  * allocator.
 214  */
 215 static inline unsigned int vmw_validation_align(unsigned int val)
 216 {
 217         return ALIGN(val, sizeof(long));
 218 }
 219
 220 int vmw_validation_add_bo(struct vmw_validation_context *ctx,
 221                           struct vmw_buffer_object *vbo,
 222                           bool as_mob, bool cpu_blit);
 223 int vmw_validation_bo_validate_single(struct ttm_buffer_object *bo,
 224                                       bool interruptible,
 225                                       bool validate_as_mob);
 226 int vmw_validation_bo_validate(struct vmw_validation_context *ctx, bool intr);
 227 void vmw_validation_unref_lists(struct vmw_validation_context *ctx);
 228 int vmw_validation_add_resource(struct vmw_validation_context *ctx,
 229                                 struct vmw_resource *res,
 230                                 size_t priv_size,
 231                                 u32 dirty,
 232                                 void **p_node,
 233                                 bool *first_usage);
 234 void vmw_validation_drop_ht(struct vmw_validation_context *ctx);
 235 int vmw_validation_res_reserve(struct vmw_validation_context *ctx,
 236                                bool intr);
 237 void vmw_validation_res_unreserve(struct vmw_validation_context *ctx,
 238                                   bool backoff);
 239 void vmw_validation_res_switch_backup(struct vmw_validation_context *ctx,
 240                                       void *val_private,
 241                                       struct vmw_buffer_object *vbo,
 242                                       unsigned long backup_offset);
 243 int vmw_validation_res_validate(struct vmw_validation_context *ctx, bool intr);
 244
 245 int vmw_validation_prepare(struct vmw_validation_context *ctx,
 246                            struct mutex *mutex, bool intr);
 247 void vmw_validation_revert(struct vmw_validation_context *ctx);
 248 void vmw_validation_done(struct vmw_validation_context *ctx,
 249                          struct vmw_fence_obj *fence);
 250
 251 void *vmw_validation_mem_alloc(struct vmw_validation_context *ctx,
 252                                unsigned int size);
 253 int vmw_validation_preload_bo(struct vmw_validation_context *ctx);
 254 int vmw_validation_preload_res(struct vmw_validation_context *ctx,
 255                                unsigned int size);
 256 void vmw_validation_res_set_dirty(struct vmw_validation_context *ctx,
 257                                   void *val_private, u32 dirty);
 258 void vmw_validation_bo_backoff(struct vmw_validation_context *ctx);
 259
 260 #endif