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| author | Joshua Bakita <bakitajoshua@gmail.com> | 2024-09-25 16:09:09 -0400 |
|---|---|---|
| committer | Joshua Bakita <bakitajoshua@gmail.com> | 2024-09-25 16:09:09 -0400 |
| commit | f347fde22f1297e4f022600d201780d5ead78114 (patch) | |
| tree | 76be305d6187003a1e0486ff6e91efb1062ae118 /include/nvgpu/semaphore.h | |
| parent | 8340d234d78a7d0f46c11a584de538148b78b7cb (diff) | |
Delete no-longer-needed nvgpu headers
The dependency on these was removed in commit 8340d234.
Diffstat (limited to 'include/nvgpu/semaphore.h')
| -rw-r--r-- | include/nvgpu/semaphore.h | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/include/nvgpu/semaphore.h b/include/nvgpu/semaphore.h deleted file mode 100644 index 94e3be0..0000000 --- a/include/nvgpu/semaphore.h +++ /dev/null | |||
| @@ -1,206 +0,0 @@ | |||
| 1 | /* | ||
| 2 | * Copyright (c) 2014-2018, NVIDIA CORPORATION. All rights reserved. | ||
| 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 shall be included in | ||
| 12 | * all copies or substantial portions of the Software. | ||
| 13 | * | ||
| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | ||
| 17 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| 18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | ||
| 19 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | ||
| 20 | * DEALINGS IN THE SOFTWARE. | ||
| 21 | */ | ||
| 22 | |||
| 23 | #ifndef SEMAPHORE_GK20A_H | ||
| 24 | #define SEMAPHORE_GK20A_H | ||
| 25 | |||
| 26 | #include <nvgpu/log.h> | ||
| 27 | #include <nvgpu/atomic.h> | ||
| 28 | #include <nvgpu/kref.h> | ||
| 29 | #include <nvgpu/list.h> | ||
| 30 | #include <nvgpu/nvgpu_mem.h> | ||
| 31 | |||
| 32 | #include "gk20a/mm_gk20a.h" | ||
| 33 | |||
| 34 | struct gk20a; | ||
| 35 | |||
| 36 | #define gpu_sema_dbg(g, fmt, args...) \ | ||
| 37 | nvgpu_log(g, gpu_dbg_sema, fmt, ##args) | ||
| 38 | #define gpu_sema_verbose_dbg(g, fmt, args...) \ | ||
| 39 | nvgpu_log(g, gpu_dbg_sema_v, fmt, ##args) | ||
| 40 | |||
| 41 | /* | ||
| 42 | * Max number of channels that can be used is 512. This of course needs to be | ||
| 43 | * fixed to be dynamic but still fast. | ||
| 44 | */ | ||
| 45 | #define SEMAPHORE_POOL_COUNT 512U | ||
| 46 | #define SEMAPHORE_SIZE 16U | ||
| 47 | #define SEMAPHORE_SEA_GROWTH_RATE 32U | ||
| 48 | |||
| 49 | struct nvgpu_semaphore_sea; | ||
| 50 | |||
| 51 | struct nvgpu_semaphore_loc { | ||
| 52 | struct nvgpu_semaphore_pool *pool; /* Pool that owns this sema. */ | ||
| 53 | u32 offset; /* Byte offset into the pool. */ | ||
| 54 | }; | ||
| 55 | |||
| 56 | /* | ||
| 57 | * Underlying semaphore data structure. This semaphore can be shared amongst | ||
| 58 | * other semaphore instances. | ||
| 59 | */ | ||
| 60 | struct nvgpu_semaphore_int { | ||
| 61 | struct nvgpu_semaphore_loc location; | ||
| 62 | nvgpu_atomic_t next_value; /* Next available value. */ | ||
| 63 | struct channel_gk20a *ch; /* Channel that owns this sema. */ | ||
| 64 | }; | ||
| 65 | |||
| 66 | /* | ||
| 67 | * A semaphore which the rest of the driver actually uses. This consists of a | ||
| 68 | * pointer to a real semaphore and a value to wait for. This allows one physical | ||
| 69 | * semaphore to be shared among an essentially infinite number of submits. | ||
| 70 | */ | ||
| 71 | struct nvgpu_semaphore { | ||
| 72 | struct gk20a *g; | ||
| 73 | struct nvgpu_semaphore_loc location; | ||
| 74 | |||
| 75 | nvgpu_atomic_t value; | ||
| 76 | bool incremented; | ||
| 77 | |||
| 78 | struct nvgpu_ref ref; | ||
| 79 | }; | ||
| 80 | |||
| 81 | /* | ||
| 82 | * A semaphore pool. Each address space will own exactly one of these. | ||
| 83 | */ | ||
| 84 | struct nvgpu_semaphore_pool { | ||
| 85 | struct nvgpu_list_node pool_list_entry; /* Node for list of pools. */ | ||
| 86 | u64 gpu_va; /* GPU access to the pool. */ | ||
| 87 | u64 gpu_va_ro; /* GPU access to the pool. */ | ||
| 88 | u64 page_idx; /* Index into sea bitmap. */ | ||
| 89 | |||
| 90 | DECLARE_BITMAP(semas_alloced, PAGE_SIZE / SEMAPHORE_SIZE); | ||
| 91 | |||
| 92 | struct nvgpu_semaphore_sea *sema_sea; /* Sea that owns this pool. */ | ||
| 93 | |||
| 94 | struct nvgpu_mutex pool_lock; | ||
| 95 | |||
| 96 | /* | ||
| 97 | * This is the address spaces's personal RW table. Other channels will | ||
| 98 | * ultimately map this page as RO. This is a sub-nvgpu_mem from the | ||
| 99 | * sea's mem. | ||
| 100 | */ | ||
| 101 | struct nvgpu_mem rw_mem; | ||
| 102 | |||
| 103 | bool mapped; | ||
| 104 | |||
| 105 | /* | ||
| 106 | * Sometimes a channel can be released before other channels are | ||
| 107 | * done waiting on it. This ref count ensures that the pool doesn't | ||
| 108 | * go away until all semaphores using this pool are cleaned up first. | ||
| 109 | */ | ||
| 110 | struct nvgpu_ref ref; | ||
| 111 | }; | ||
| 112 | |||
| 113 | static inline struct nvgpu_semaphore_pool * | ||
| 114 | nvgpu_semaphore_pool_from_pool_list_entry(struct nvgpu_list_node *node) | ||
| 115 | { | ||
| 116 | return (struct nvgpu_semaphore_pool *) | ||
| 117 | ((uintptr_t)node - | ||
| 118 | offsetof(struct nvgpu_semaphore_pool, pool_list_entry)); | ||
| 119 | }; | ||
| 120 | |||
| 121 | /* | ||
| 122 | * A sea of semaphores pools. Each pool is owned by a single VM. Since multiple | ||
| 123 | * channels can share a VM each channel gets it's own HW semaphore from the | ||
| 124 | * pool. Channels then allocate regular semaphores - basically just a value that | ||
| 125 | * signifies when a particular job is done. | ||
| 126 | */ | ||
| 127 | struct nvgpu_semaphore_sea { | ||
| 128 | struct nvgpu_list_node pool_list; /* List of pools in this sea. */ | ||
| 129 | struct gk20a *gk20a; | ||
| 130 | |||
| 131 | size_t size; /* Number of pages available. */ | ||
| 132 | u64 gpu_va; /* GPU virtual address of sema sea. */ | ||
| 133 | u64 map_size; /* Size of the mapping. */ | ||
| 134 | |||
| 135 | /* | ||
| 136 | * TODO: | ||
| 137 | * List of pages that we use to back the pools. The number of pages | ||
| 138 | * can grow dynamically since allocating 512 pages for all channels at | ||
| 139 | * once would be a tremendous waste. | ||
| 140 | */ | ||
| 141 | int page_count; /* Pages allocated to pools. */ | ||
| 142 | |||
| 143 | /* | ||
| 144 | * The read-only memory for the entire semaphore sea. Each semaphore | ||
| 145 | * pool needs a sub-nvgpu_mem that will be mapped as RW in its address | ||
| 146 | * space. This sea_mem cannot be freed until all semaphore_pools have | ||
| 147 | * been freed. | ||
| 148 | */ | ||
| 149 | struct nvgpu_mem sea_mem; | ||
| 150 | |||
| 151 | /* | ||
| 152 | * Can't use a regular allocator here since the full range of pools are | ||
| 153 | * not always allocated. Instead just use a bitmap. | ||
| 154 | */ | ||
| 155 | DECLARE_BITMAP(pools_alloced, SEMAPHORE_POOL_COUNT); | ||
| 156 | |||
| 157 | struct nvgpu_mutex sea_lock; /* Lock alloc/free calls. */ | ||
| 158 | }; | ||
| 159 | |||
| 160 | /* | ||
| 161 | * Semaphore sea functions. | ||
| 162 | */ | ||
| 163 | struct nvgpu_semaphore_sea *nvgpu_semaphore_sea_create(struct gk20a *gk20a); | ||
| 164 | void nvgpu_semaphore_sea_destroy(struct gk20a *g); | ||
| 165 | int nvgpu_semaphore_sea_map(struct nvgpu_semaphore_pool *sea, | ||
| 166 | struct vm_gk20a *vm); | ||
| 167 | void nvgpu_semaphore_sea_unmap(struct nvgpu_semaphore_pool *sea, | ||
| 168 | struct vm_gk20a *vm); | ||
| 169 | struct nvgpu_semaphore_sea *nvgpu_semaphore_get_sea(struct gk20a *g); | ||
| 170 | |||
| 171 | /* | ||
| 172 | * Semaphore pool functions. | ||
| 173 | */ | ||
| 174 | int nvgpu_semaphore_pool_alloc(struct nvgpu_semaphore_sea *sea, | ||
| 175 | struct nvgpu_semaphore_pool **pool); | ||
| 176 | int nvgpu_semaphore_pool_map(struct nvgpu_semaphore_pool *pool, | ||
| 177 | struct vm_gk20a *vm); | ||
| 178 | void nvgpu_semaphore_pool_unmap(struct nvgpu_semaphore_pool *pool, | ||
| 179 | struct vm_gk20a *vm); | ||
| 180 | u64 __nvgpu_semaphore_pool_gpu_va(struct nvgpu_semaphore_pool *p, bool global); | ||
| 181 | void nvgpu_semaphore_pool_get(struct nvgpu_semaphore_pool *p); | ||
| 182 | void nvgpu_semaphore_pool_put(struct nvgpu_semaphore_pool *p); | ||
| 183 | |||
| 184 | /* | ||
| 185 | * Semaphore functions. | ||
| 186 | */ | ||
| 187 | struct nvgpu_semaphore *nvgpu_semaphore_alloc(struct channel_gk20a *ch); | ||
| 188 | void nvgpu_semaphore_put(struct nvgpu_semaphore *s); | ||
| 189 | void nvgpu_semaphore_get(struct nvgpu_semaphore *s); | ||
| 190 | void nvgpu_semaphore_free_hw_sema(struct channel_gk20a *ch); | ||
| 191 | |||
| 192 | u64 nvgpu_semaphore_gpu_rw_va(struct nvgpu_semaphore *s); | ||
| 193 | u64 nvgpu_semaphore_gpu_ro_va(struct nvgpu_semaphore *s); | ||
| 194 | u64 nvgpu_hw_sema_addr(struct nvgpu_semaphore_int *hw_sema); | ||
| 195 | |||
| 196 | u32 __nvgpu_semaphore_read(struct nvgpu_semaphore_int *hw_sema); | ||
| 197 | u32 nvgpu_semaphore_read(struct nvgpu_semaphore *s); | ||
| 198 | u32 nvgpu_semaphore_get_value(struct nvgpu_semaphore *s); | ||
| 199 | bool nvgpu_semaphore_is_released(struct nvgpu_semaphore *s); | ||
| 200 | bool nvgpu_semaphore_is_acquired(struct nvgpu_semaphore *s); | ||
| 201 | |||
| 202 | bool nvgpu_semaphore_reset(struct nvgpu_semaphore_int *hw_sema); | ||
| 203 | void nvgpu_semaphore_prepare(struct nvgpu_semaphore *s, | ||
| 204 | struct nvgpu_semaphore_int *hw_sema); | ||
| 205 | |||
| 206 | #endif | ||
