Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* |
Sumukh Hallymysore Ravindra | 709d212 | 2020-05-20 12:53:14 +0530 | [diff] [blame^] | 3 | * Copyright (c) 2019-2020, The Linux Foundation. All rights reserved. |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 4 | */ |
| 5 | #define pr_fmt(fmt) "synx: " fmt |
| 6 | |
| 7 | #include <linux/fs.h> |
| 8 | #include <linux/module.h> |
| 9 | #include <linux/poll.h> |
| 10 | #include <linux/slab.h> |
| 11 | #include <linux/uaccess.h> |
| 12 | |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 13 | #include "synx_api.h" |
| 14 | #include "synx_util.h" |
Carlos Hopkins | 81eb341 | 2019-02-22 13:57:54 -0800 | [diff] [blame] | 15 | #include "synx_debugfs.h" |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 16 | |
| 17 | struct synx_device *synx_dev; |
| 18 | |
| 19 | void synx_external_callback(s32 sync_obj, int status, void *data) |
| 20 | { |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 21 | s32 synx_obj; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 22 | struct synx_table_row *row = NULL; |
| 23 | struct synx_external_data *bind_data = data; |
| 24 | |
| 25 | if (bind_data) { |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 26 | synx_obj = bind_data->synx_obj; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 27 | row = synx_from_key(bind_data->synx_obj, bind_data->secure_key); |
| 28 | kfree(bind_data); |
| 29 | } |
| 30 | |
| 31 | if (row) { |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 32 | mutex_lock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 33 | row->signaling_id = sync_obj; |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 34 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 35 | |
| 36 | pr_debug("signaling synx 0x%x from external callback %d\n", |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 37 | synx_obj, sync_obj); |
Sumukh Hallymysore Ravindra | eb85bfd | 2019-02-14 12:01:18 -0800 | [diff] [blame] | 38 | synx_signal_core(row, status); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 39 | } else { |
| 40 | pr_err("invalid callback from sync external obj %d\n", |
| 41 | sync_obj); |
| 42 | } |
| 43 | } |
| 44 | |
| 45 | bool synx_fence_enable_signaling(struct dma_fence *fence) |
| 46 | { |
| 47 | return true; |
| 48 | } |
| 49 | |
| 50 | const char *synx_fence_driver_name(struct dma_fence *fence) |
| 51 | { |
| 52 | return "Global Synx driver"; |
| 53 | } |
| 54 | |
| 55 | void synx_fence_release(struct dma_fence *fence) |
| 56 | { |
| 57 | struct synx_table_row *row = NULL; |
| 58 | |
| 59 | pr_debug("Enter %s\n", __func__); |
| 60 | |
| 61 | row = synx_from_fence(fence); |
| 62 | if (row) { |
| 63 | /* metadata (row) will be cleared in the deinit function */ |
| 64 | synx_deinit_object(row); |
| 65 | } |
| 66 | |
| 67 | pr_debug("Exit %s\n", __func__); |
| 68 | } |
| 69 | |
| 70 | static struct dma_fence_ops synx_fence_ops = { |
| 71 | .wait = dma_fence_default_wait, |
| 72 | .enable_signaling = synx_fence_enable_signaling, |
| 73 | .get_driver_name = synx_fence_driver_name, |
| 74 | .get_timeline_name = synx_fence_driver_name, |
| 75 | .release = synx_fence_release, |
| 76 | }; |
| 77 | |
| 78 | int synx_create(s32 *synx_obj, const char *name) |
| 79 | { |
| 80 | int rc; |
| 81 | long idx; |
| 82 | bool bit; |
| 83 | s32 id; |
| 84 | struct synx_table_row *row = NULL; |
| 85 | |
| 86 | pr_debug("Enter %s\n", __func__); |
| 87 | |
| 88 | do { |
| 89 | idx = find_first_zero_bit(synx_dev->bitmap, SYNX_MAX_OBJS); |
| 90 | if (idx >= SYNX_MAX_OBJS) |
| 91 | return -ENOMEM; |
| 92 | pr_debug("index location available at idx: %ld\n", idx); |
| 93 | bit = test_and_set_bit(idx, synx_dev->bitmap); |
| 94 | } while (bit); |
| 95 | |
| 96 | /* global synx id */ |
| 97 | id = synx_create_handle(synx_dev->synx_table + idx); |
Sumukh Hallymysore Ravindra | 29edeb7 | 2019-04-12 17:50:45 -0700 | [diff] [blame] | 98 | if (id < 0) { |
| 99 | pr_err("unable to allocate the synx handle\n"); |
| 100 | clear_bit(idx, synx_dev->bitmap); |
| 101 | return -EINVAL; |
| 102 | } |
| 103 | |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 104 | rc = synx_init_object(synx_dev->synx_table, |
| 105 | idx, id, name, &synx_fence_ops); |
Sumukh Hallymysore Ravindra | 29edeb7 | 2019-04-12 17:50:45 -0700 | [diff] [blame] | 106 | if (rc < 0) { |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 107 | pr_err("unable to init row at idx = %ld\n", idx); |
| 108 | clear_bit(idx, synx_dev->bitmap); |
| 109 | return -EINVAL; |
| 110 | } |
| 111 | |
| 112 | row = synx_dev->synx_table + idx; |
| 113 | rc = synx_activate(row); |
| 114 | if (rc) { |
| 115 | pr_err("unable to activate row at idx = %ld\n", idx); |
| 116 | synx_deinit_object(row); |
| 117 | return -EINVAL; |
| 118 | } |
| 119 | |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 120 | *synx_obj = id; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 121 | |
Jordan Crouse | 1d790b7 | 2019-02-14 16:08:29 -0700 | [diff] [blame] | 122 | pr_debug("row: synx id: 0x%x, index: %d\n", |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 123 | id, row->index); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 124 | pr_debug("Exit %s\n", __func__); |
| 125 | |
| 126 | return rc; |
| 127 | } |
| 128 | |
| 129 | int synx_register_callback(s32 synx_obj, |
| 130 | void *userdata, synx_callback cb_func) |
| 131 | { |
| 132 | u32 state = SYNX_STATE_INVALID; |
| 133 | struct synx_callback_info *synx_cb; |
| 134 | struct synx_callback_info *temp_cb_info; |
| 135 | struct synx_table_row *row = NULL; |
| 136 | |
| 137 | row = synx_from_handle(synx_obj); |
| 138 | if (!row || !cb_func) |
| 139 | return -EINVAL; |
| 140 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 141 | mutex_lock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 142 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 143 | state = synx_status(row); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 144 | /* do not register if callback registered earlier */ |
| 145 | list_for_each_entry(temp_cb_info, &row->callback_list, list) { |
| 146 | if (temp_cb_info->callback_func == cb_func && |
| 147 | temp_cb_info->cb_data == userdata) { |
| 148 | pr_err("duplicate registration for synx 0x%x\n", |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 149 | synx_obj); |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 150 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 151 | return -EALREADY; |
| 152 | } |
| 153 | } |
| 154 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 155 | synx_cb = kzalloc(sizeof(*synx_cb), GFP_KERNEL); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 156 | if (!synx_cb) { |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 157 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 158 | return -ENOMEM; |
| 159 | } |
| 160 | |
| 161 | synx_cb->callback_func = cb_func; |
| 162 | synx_cb->cb_data = userdata; |
| 163 | synx_cb->synx_obj = synx_obj; |
| 164 | INIT_WORK(&synx_cb->cb_dispatch_work, synx_util_cb_dispatch); |
| 165 | |
| 166 | /* trigger callback if synx object is already in SIGNALED state */ |
| 167 | if (state == SYNX_STATE_SIGNALED_SUCCESS || |
| 168 | state == SYNX_STATE_SIGNALED_ERROR) { |
| 169 | synx_cb->status = state; |
| 170 | pr_debug("callback triggered for synx 0x%x\n", |
| 171 | synx_cb->synx_obj); |
| 172 | queue_work(synx_dev->work_queue, |
| 173 | &synx_cb->cb_dispatch_work); |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 174 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 175 | return 0; |
| 176 | } |
| 177 | |
| 178 | list_add_tail(&synx_cb->list, &row->callback_list); |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 179 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 180 | |
| 181 | return 0; |
| 182 | } |
| 183 | |
| 184 | int synx_deregister_callback(s32 synx_obj, |
| 185 | synx_callback cb_func, |
| 186 | void *userdata, |
| 187 | synx_callback cancel_cb_func) |
| 188 | { |
| 189 | u32 state = SYNX_STATE_INVALID; |
| 190 | struct synx_table_row *row = NULL; |
| 191 | struct synx_callback_info *synx_cb, *temp; |
| 192 | |
| 193 | row = synx_from_handle(synx_obj); |
| 194 | if (!row) { |
| 195 | pr_err("invalid synx 0x%x\n", synx_obj); |
| 196 | return -EINVAL; |
| 197 | } |
| 198 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 199 | mutex_lock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 200 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 201 | state = synx_status(row); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 202 | pr_debug("de-registering callback for synx 0x%x\n", |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 203 | synx_obj); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 204 | list_for_each_entry_safe(synx_cb, temp, &row->callback_list, list) { |
| 205 | if (synx_cb->callback_func == cb_func && |
| 206 | synx_cb->cb_data == userdata) { |
| 207 | list_del_init(&synx_cb->list); |
| 208 | if (cancel_cb_func) { |
| 209 | synx_cb->status = SYNX_CALLBACK_RESULT_CANCELED; |
| 210 | synx_cb->callback_func = cancel_cb_func; |
| 211 | queue_work(synx_dev->work_queue, |
| 212 | &synx_cb->cb_dispatch_work); |
| 213 | } else { |
| 214 | kfree(synx_cb); |
| 215 | } |
| 216 | } |
| 217 | } |
| 218 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 219 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 220 | return 0; |
| 221 | } |
| 222 | |
Sumukh Hallymysore Ravindra | eb85bfd | 2019-02-14 12:01:18 -0800 | [diff] [blame] | 223 | int synx_signal_core(struct synx_table_row *row, u32 status) |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 224 | { |
Sumukh Hallymysore Ravindra | 3c6ef89 | 2019-02-11 15:49:33 -0800 | [diff] [blame] | 225 | int rc, ret; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 226 | u32 i = 0; |
| 227 | u32 idx = 0; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 228 | s32 sync_id; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 229 | struct synx_external_data *data = NULL; |
| 230 | struct synx_bind_desc bind_descs[SYNX_MAX_NUM_BINDINGS]; |
| 231 | struct bind_operations *bind_ops = NULL; |
| 232 | |
| 233 | pr_debug("Enter %s\n", __func__); |
| 234 | |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 235 | if (!row) { |
Sumukh Hallymysore Ravindra | eb85bfd | 2019-02-14 12:01:18 -0800 | [diff] [blame] | 236 | pr_err("invalid synx row\n"); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 237 | return -EINVAL; |
| 238 | } |
| 239 | |
| 240 | if (status != SYNX_STATE_SIGNALED_SUCCESS && |
| 241 | status != SYNX_STATE_SIGNALED_ERROR) { |
| 242 | pr_err("signaling with undefined status = %d\n", |
| 243 | status); |
| 244 | return -EINVAL; |
| 245 | } |
| 246 | |
| 247 | if (is_merged_synx(row)) { |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 248 | pr_err("signaling a composite synx object at %d\n", |
| 249 | row->index); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 250 | return -EINVAL; |
| 251 | } |
| 252 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 253 | mutex_lock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 254 | |
Sumukh Hallymysore Ravindra | bd281fb | 2019-09-25 13:33:08 -0700 | [diff] [blame] | 255 | if (!row->index) { |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 256 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | bd281fb | 2019-09-25 13:33:08 -0700 | [diff] [blame] | 257 | pr_err("object already cleaned up at %d\n", |
| 258 | row->index); |
| 259 | return -EINVAL; |
| 260 | } |
| 261 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 262 | if (synx_status(row) != SYNX_STATE_ACTIVE) { |
| 263 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 264 | pr_err("object already signaled synx at %d\n", |
| 265 | row->index); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 266 | return -EALREADY; |
| 267 | } |
| 268 | |
| 269 | /* set fence error to model {signal w/ error} */ |
| 270 | if (status == SYNX_STATE_SIGNALED_ERROR) |
| 271 | dma_fence_set_error(row->fence, -EINVAL); |
| 272 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 273 | rc = dma_fence_signal(row->fence); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 274 | if (rc < 0) { |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 275 | pr_err("unable to signal synx at %d, err: %d\n", |
| 276 | row->index, rc); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 277 | if (status != SYNX_STATE_SIGNALED_ERROR) { |
| 278 | dma_fence_set_error(row->fence, -EINVAL); |
| 279 | status = SYNX_STATE_SIGNALED_ERROR; |
| 280 | } |
| 281 | } |
| 282 | |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 283 | synx_callback_dispatch(row); |
| 284 | |
| 285 | /* |
| 286 | * signal the external bound sync obj/s even if fence signal fails, |
| 287 | * w/ error signal state (set above) to prevent deadlock |
| 288 | */ |
| 289 | if (row->num_bound_synxs > 0) { |
| 290 | memset(bind_descs, 0, |
| 291 | sizeof(struct synx_bind_desc) * SYNX_MAX_NUM_BINDINGS); |
| 292 | for (i = 0; i < row->num_bound_synxs; i++) { |
| 293 | /* signal invoked by external sync obj */ |
| 294 | if (row->signaling_id == |
| 295 | row->bound_synxs[i].external_desc.id[0]) { |
| 296 | pr_debug("signaling_bound_sync: %d, skipping\n", |
| 297 | row->signaling_id); |
| 298 | memset(&row->bound_synxs[i], 0, |
| 299 | sizeof(struct synx_bind_desc)); |
| 300 | continue; |
| 301 | } |
| 302 | memcpy(&bind_descs[idx++], |
| 303 | &row->bound_synxs[i], |
| 304 | sizeof(struct synx_bind_desc)); |
| 305 | /* clear the memory, its been backed up above */ |
| 306 | memset(&row->bound_synxs[i], 0, |
| 307 | sizeof(struct synx_bind_desc)); |
| 308 | } |
| 309 | row->num_bound_synxs = 0; |
| 310 | } |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 311 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 312 | |
| 313 | for (i = 0; i < idx; i++) { |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 314 | sync_id = bind_descs[i].external_desc.id[0]; |
| 315 | data = bind_descs[i].external_data; |
Sumukh Hallymysore Ravindra | 6b7d025 | 2019-06-12 14:05:18 -0700 | [diff] [blame] | 316 | bind_ops = synx_get_bind_ops( |
| 317 | bind_descs[i].external_desc.type); |
| 318 | if (!bind_ops) { |
| 319 | pr_err("invalid bind ops for %u\n", |
| 320 | bind_descs[i].external_desc.type); |
| 321 | kfree(data); |
| 322 | continue; |
| 323 | } |
| 324 | /* |
| 325 | * we are already signaled, so don't want to |
| 326 | * recursively be signaled |
| 327 | */ |
| 328 | ret = bind_ops->deregister_callback( |
| 329 | synx_external_callback, data, sync_id); |
| 330 | if (ret < 0) |
| 331 | pr_err("de-registration fail on sync: %d, err: %d\n", |
| 332 | sync_id, ret); |
| 333 | pr_debug("signaling external sync: %d, status: %u\n", |
| 334 | sync_id, status); |
| 335 | /* optional function to enable external signaling */ |
| 336 | if (bind_ops->enable_signaling) { |
| 337 | ret = bind_ops->enable_signaling(sync_id); |
| 338 | if (ret < 0) { |
| 339 | pr_err("enable signaling fail on sync: %d, err: %d\n", |
| 340 | sync_id, ret); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 341 | continue; |
| 342 | } |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 343 | } |
| 344 | |
Sumukh Hallymysore Ravindra | 6b7d025 | 2019-06-12 14:05:18 -0700 | [diff] [blame] | 345 | ret = bind_ops->signal(sync_id, status); |
| 346 | if (ret < 0) |
| 347 | pr_err("signaling fail on sync: %d, err: %d\n", |
| 348 | sync_id, ret); |
| 349 | |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 350 | /* |
| 351 | * release the memory allocated for external data. |
| 352 | * It is safe to release this memory as external cb |
| 353 | * has been already deregistered before this. |
| 354 | */ |
| 355 | kfree(data); |
| 356 | } |
| 357 | |
| 358 | pr_debug("Exit %s\n", __func__); |
| 359 | return rc; |
| 360 | } |
| 361 | |
Sumukh Hallymysore Ravindra | eb85bfd | 2019-02-14 12:01:18 -0800 | [diff] [blame] | 362 | int synx_signal(s32 synx_obj, u32 status) |
| 363 | { |
| 364 | struct synx_table_row *row = NULL; |
| 365 | |
| 366 | row = synx_from_handle(synx_obj); |
| 367 | if (!row) { |
| 368 | pr_err("invalid synx: 0x%x\n", synx_obj); |
| 369 | return -EINVAL; |
| 370 | } |
| 371 | |
| 372 | return synx_signal_core(row, status); |
| 373 | } |
| 374 | |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 375 | int synx_merge(s32 *synx_objs, u32 num_objs, s32 *synx_merged) |
| 376 | { |
| 377 | int rc; |
| 378 | long idx = 0; |
| 379 | bool bit; |
| 380 | s32 id; |
| 381 | u32 count = 0; |
| 382 | struct dma_fence **fences = NULL; |
| 383 | struct synx_table_row *row = NULL; |
| 384 | |
| 385 | pr_debug("Enter %s\n", __func__); |
| 386 | |
| 387 | if (!synx_objs || !synx_merged) { |
| 388 | pr_err("invalid pointer(s)\n"); |
| 389 | return -EINVAL; |
| 390 | } |
| 391 | |
| 392 | rc = synx_util_validate_merge(synx_objs, num_objs, &fences, &count); |
| 393 | if (rc < 0) { |
| 394 | pr_err("validation failed, merge not allowed\n"); |
| 395 | rc = -EINVAL; |
| 396 | goto free; |
| 397 | } |
| 398 | |
| 399 | do { |
| 400 | idx = find_first_zero_bit(synx_dev->bitmap, SYNX_MAX_OBJS); |
| 401 | if (idx >= SYNX_MAX_OBJS) { |
| 402 | rc = -ENOMEM; |
| 403 | goto free; |
| 404 | } |
| 405 | bit = test_and_set_bit(idx, synx_dev->bitmap); |
| 406 | } while (bit); |
| 407 | |
| 408 | /* global synx id */ |
| 409 | id = synx_create_handle(synx_dev->synx_table + idx); |
| 410 | |
| 411 | rc = synx_init_group_object(synx_dev->synx_table, |
| 412 | idx, id, fences, count); |
| 413 | if (rc < 0) { |
| 414 | pr_err("unable to init row at idx = %ld\n", idx); |
| 415 | goto clear; |
| 416 | } |
| 417 | |
| 418 | row = synx_dev->synx_table + idx; |
| 419 | rc = synx_activate(row); |
| 420 | if (rc) { |
| 421 | pr_err("unable to activate row at idx = %ld, synx 0x%x\n", |
| 422 | idx, id); |
| 423 | goto clear; |
| 424 | } |
| 425 | |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 426 | *synx_merged = id; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 427 | |
Jordan Crouse | 1d790b7 | 2019-02-14 16:08:29 -0700 | [diff] [blame] | 428 | pr_debug("row (merged): synx 0x%x, index: %d\n", |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 429 | id, row->index); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 430 | pr_debug("Exit %s\n", __func__); |
| 431 | |
| 432 | return 0; |
| 433 | |
| 434 | clear: |
| 435 | clear_bit(idx, synx_dev->bitmap); |
| 436 | free: |
| 437 | synx_merge_error(synx_objs, count); |
| 438 | if (num_objs <= count) |
| 439 | kfree(fences); |
| 440 | return rc; |
| 441 | } |
| 442 | |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 443 | static int synx_release_core(struct synx_table_row *row) |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 444 | { |
| 445 | s32 idx; |
| 446 | struct dma_fence *fence = NULL; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 447 | |
| 448 | /* |
| 449 | * metadata might be cleared after invoking dma_fence_put |
| 450 | * (definitely for merged synx on invoing deinit) |
| 451 | * be carefull while accessing the metadata |
| 452 | */ |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 453 | mutex_lock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 454 | fence = row->fence; |
| 455 | idx = row->index; |
Sumukh Hallymysore Ravindra | bd281fb | 2019-09-25 13:33:08 -0700 | [diff] [blame] | 456 | if (!idx) { |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 457 | mutex_unlock(&synx_dev->row_locks[idx]); |
Sumukh Hallymysore Ravindra | bd281fb | 2019-09-25 13:33:08 -0700 | [diff] [blame] | 458 | pr_err("object already cleaned up at %d\n", idx); |
| 459 | return -EINVAL; |
| 460 | } |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 461 | /* |
| 462 | * we need to clear the metadata for merged synx obj upon synx_release |
| 463 | * itself as it does not invoke the synx_fence_release function. |
| 464 | * See synx_export for more explanation. |
| 465 | */ |
| 466 | if (is_merged_synx(row)) |
| 467 | synx_deinit_object(row); |
| 468 | |
| 469 | /* do not reference fence and row in the function after this */ |
| 470 | dma_fence_put(fence); |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 471 | mutex_unlock(&synx_dev->row_locks[idx]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 472 | pr_debug("Exit %s\n", __func__); |
| 473 | |
| 474 | return 0; |
| 475 | } |
| 476 | |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 477 | int synx_release(s32 synx_obj) |
| 478 | { |
| 479 | struct synx_table_row *row = NULL; |
| 480 | |
| 481 | pr_debug("Enter %s\n", __func__); |
| 482 | |
| 483 | row = synx_from_handle(synx_obj); |
| 484 | if (!row) { |
| 485 | pr_err("invalid synx: 0x%x\n", synx_obj); |
| 486 | return -EINVAL; |
| 487 | } |
| 488 | |
| 489 | return synx_release_core(row); |
| 490 | } |
| 491 | |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 492 | int synx_wait(s32 synx_obj, u64 timeout_ms) |
| 493 | { |
| 494 | unsigned long timeleft; |
| 495 | struct synx_table_row *row = NULL; |
| 496 | |
| 497 | pr_debug("Enter %s\n", __func__); |
| 498 | |
| 499 | row = synx_from_handle(synx_obj); |
| 500 | if (!row) { |
| 501 | pr_err("invalid synx: 0x%x\n", synx_obj); |
| 502 | return -EINVAL; |
| 503 | } |
| 504 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 505 | mutex_lock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | bd281fb | 2019-09-25 13:33:08 -0700 | [diff] [blame] | 506 | if (!row->index) { |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 507 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | bd281fb | 2019-09-25 13:33:08 -0700 | [diff] [blame] | 508 | pr_err("object already cleaned up at %d\n", |
| 509 | row->index); |
| 510 | return -EINVAL; |
| 511 | } |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 512 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | bd281fb | 2019-09-25 13:33:08 -0700 | [diff] [blame] | 513 | |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 514 | timeleft = dma_fence_wait_timeout(row->fence, (bool) 0, |
| 515 | msecs_to_jiffies(timeout_ms)); |
| 516 | if (timeleft <= 0) { |
| 517 | pr_err("timed out for synx obj 0x%x\n", synx_obj); |
| 518 | return -ETIMEDOUT; |
| 519 | } |
| 520 | |
| 521 | if (synx_status(row) != SYNX_STATE_SIGNALED_SUCCESS) { |
| 522 | pr_err("signaled error on synx obj 0x%x\n", synx_obj); |
| 523 | return -EINVAL; |
| 524 | } |
| 525 | |
| 526 | pr_debug("Exit %s\n", __func__); |
| 527 | |
| 528 | return 0; |
| 529 | } |
| 530 | |
| 531 | int synx_bind(s32 synx_obj, struct synx_external_desc external_sync) |
| 532 | { |
| 533 | int rc = 0; |
| 534 | u32 i = 0; |
| 535 | struct synx_table_row *row = NULL; |
| 536 | struct synx_external_data *data = NULL; |
| 537 | struct bind_operations *bind_ops = NULL; |
| 538 | |
| 539 | pr_debug("Enter %s\n", __func__); |
| 540 | |
| 541 | row = (struct synx_table_row *)synx_from_handle(synx_obj); |
| 542 | if (!row) { |
| 543 | pr_err("invalid synx: 0x%x\n", synx_obj); |
| 544 | return -EINVAL; |
| 545 | } |
| 546 | |
| 547 | if (is_merged_synx(row)) { |
| 548 | pr_err("cannot bind to merged fence: 0x%x\n", synx_obj); |
| 549 | return -EINVAL; |
| 550 | } |
| 551 | |
Sumukh Hallymysore Ravindra | 6b7d025 | 2019-06-12 14:05:18 -0700 | [diff] [blame] | 552 | bind_ops = synx_get_bind_ops(external_sync.type); |
| 553 | if (!bind_ops) { |
| 554 | pr_err("invalid bind ops for %u\n", |
| 555 | external_sync.type); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 556 | return -EINVAL; |
| 557 | } |
| 558 | |
| 559 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
| 560 | if (!data) |
| 561 | return -ENOMEM; |
| 562 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 563 | mutex_lock(&synx_dev->row_locks[row->index]); |
| 564 | if (synx_status(row) != SYNX_STATE_ACTIVE) { |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 565 | pr_err("bind to non-active synx is prohibited 0x%x\n", |
| 566 | synx_obj); |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 567 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 568 | kfree(data); |
| 569 | return -EINVAL; |
| 570 | } |
| 571 | |
| 572 | if (row->num_bound_synxs >= SYNX_MAX_NUM_BINDINGS) { |
| 573 | pr_err("max number of bindings reached for synx_objs 0x%x\n", |
| 574 | synx_obj); |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 575 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 576 | kfree(data); |
| 577 | return -ENOMEM; |
| 578 | } |
| 579 | |
| 580 | /* don't bind external sync obj is already done */ |
| 581 | for (i = 0; i < row->num_bound_synxs; i++) { |
| 582 | if (external_sync.id[0] == |
| 583 | row->bound_synxs[i].external_desc.id[0]) { |
| 584 | pr_err("duplicate binding for external sync %d\n", |
| 585 | external_sync.id[0]); |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 586 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 587 | kfree(data); |
| 588 | return -EALREADY; |
| 589 | } |
| 590 | } |
| 591 | |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 592 | /* data passed to external callback */ |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 593 | data->synx_obj = synx_obj; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 594 | data->secure_key = synx_generate_secure_key(row); |
| 595 | |
| 596 | rc = bind_ops->register_callback(synx_external_callback, |
| 597 | data, external_sync.id[0]); |
| 598 | if (rc < 0) { |
| 599 | pr_err("callback registration failed for %d\n", |
| 600 | external_sync.id[0]); |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 601 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 602 | kfree(data); |
| 603 | return rc; |
| 604 | } |
| 605 | |
| 606 | memcpy(&row->bound_synxs[row->num_bound_synxs], |
| 607 | &external_sync, sizeof(struct synx_external_desc)); |
| 608 | row->bound_synxs[row->num_bound_synxs].external_data = data; |
| 609 | row->num_bound_synxs = row->num_bound_synxs + 1; |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 610 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 611 | |
| 612 | pr_debug("added external sync %d to bindings of 0x%x\n", |
| 613 | external_sync.id[0], synx_obj); |
| 614 | |
| 615 | pr_debug("Exit %s\n", __func__); |
| 616 | return rc; |
| 617 | } |
| 618 | |
| 619 | int synx_get_status(s32 synx_obj) |
| 620 | { |
| 621 | struct synx_table_row *row = NULL; |
| 622 | |
| 623 | pr_debug("getting the status for synx 0x%x\n", synx_obj); |
| 624 | |
| 625 | row = (struct synx_table_row *)synx_from_handle(synx_obj); |
| 626 | if (!row) { |
| 627 | pr_err("invalid synx: 0x%x\n", synx_obj); |
| 628 | return SYNX_STATE_INVALID; |
| 629 | } |
| 630 | |
| 631 | return synx_status(row); |
| 632 | } |
| 633 | |
| 634 | int synx_addrefcount(s32 synx_obj, s32 count) |
| 635 | { |
| 636 | struct synx_table_row *row = NULL; |
| 637 | |
| 638 | row = synx_from_handle(synx_obj); |
| 639 | if (!row) { |
| 640 | pr_err("invalid synx: 0x%x\n", synx_obj); |
| 641 | return -EINVAL; |
| 642 | } |
| 643 | |
| 644 | if ((count < 0) || (count > SYNX_MAX_REF_COUNTS)) { |
| 645 | pr_err("invalid count, consider reducing : 0x%x\n", |
| 646 | synx_obj); |
| 647 | return -EINVAL; |
| 648 | } |
| 649 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 650 | mutex_lock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 651 | while (count--) |
| 652 | dma_fence_get(row->fence); |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 653 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 654 | |
| 655 | return 0; |
| 656 | } |
| 657 | |
Sumukh Hallymysore Ravindra | 9e0b697 | 2019-06-24 14:36:34 -0700 | [diff] [blame] | 658 | int synx_import(s32 synx_obj, u32 import_key, s32 *new_synx_obj) |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 659 | { |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 660 | s32 id; |
Sumukh Hallymysore Ravindra | 9e0b697 | 2019-06-24 14:36:34 -0700 | [diff] [blame] | 661 | struct dma_fence *fence; |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 662 | struct synx_obj_node *obj_node; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 663 | struct synx_table_row *row = NULL; |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 664 | u32 index; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 665 | |
| 666 | pr_debug("Enter %s\n", __func__); |
| 667 | |
Sumukh Hallymysore Ravindra | 17d0816 | 2019-02-20 14:00:47 -0800 | [diff] [blame] | 668 | if (!new_synx_obj) |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 669 | return -EINVAL; |
| 670 | |
Sumukh Hallymysore Ravindra | 9e0b697 | 2019-06-24 14:36:34 -0700 | [diff] [blame] | 671 | row = synx_from_import_key(synx_obj, import_key); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 672 | if (!row) |
| 673 | return -EINVAL; |
| 674 | |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 675 | obj_node = kzalloc(sizeof(*obj_node), GFP_KERNEL); |
| 676 | if (!obj_node) |
| 677 | return -ENOMEM; |
| 678 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 679 | mutex_lock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | bd281fb | 2019-09-25 13:33:08 -0700 | [diff] [blame] | 680 | if (!row->index) { |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 681 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | bd281fb | 2019-09-25 13:33:08 -0700 | [diff] [blame] | 682 | pr_err("object already cleaned up at %d\n", |
| 683 | row->index); |
| 684 | kfree(obj_node); |
| 685 | return -EINVAL; |
| 686 | } |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 687 | |
| 688 | /* new global synx id */ |
| 689 | id = synx_create_handle(row); |
| 690 | if (id < 0) { |
| 691 | fence = row->fence; |
| 692 | index = row->index; |
| 693 | if (is_merged_synx(row)) { |
| 694 | memset(row, 0, sizeof(*row)); |
| 695 | clear_bit(index, synx_dev->bitmap); |
| 696 | mutex_unlock(&synx_dev->row_locks[index]); |
| 697 | } |
| 698 | /* release the reference obtained during export */ |
| 699 | dma_fence_put(fence); |
| 700 | kfree(obj_node); |
| 701 | pr_err("error creating handle for import\n"); |
| 702 | return -EINVAL; |
| 703 | } |
| 704 | |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 705 | obj_node->synx_obj = id; |
| 706 | list_add(&obj_node->list, &row->synx_obj_list); |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 707 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 708 | |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 709 | *new_synx_obj = id; |
| 710 | pr_debug("Exit %s\n", __func__); |
| 711 | |
| 712 | return 0; |
| 713 | } |
| 714 | |
Sumukh Hallymysore Ravindra | 9e0b697 | 2019-06-24 14:36:34 -0700 | [diff] [blame] | 715 | int synx_export(s32 synx_obj, u32 *import_key) |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 716 | { |
Sumukh Hallymysore Ravindra | 9e0b697 | 2019-06-24 14:36:34 -0700 | [diff] [blame] | 717 | int rc; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 718 | struct synx_table_row *row = NULL; |
| 719 | |
Sumukh Hallymysore Ravindra | 9e0b697 | 2019-06-24 14:36:34 -0700 | [diff] [blame] | 720 | pr_debug("Enter %s\n", __func__); |
| 721 | |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 722 | row = synx_from_handle(synx_obj); |
| 723 | if (!row) |
| 724 | return -EINVAL; |
| 725 | |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 726 | rc = synx_generate_import_key(row, synx_obj, import_key); |
Sumukh Hallymysore Ravindra | 9e0b697 | 2019-06-24 14:36:34 -0700 | [diff] [blame] | 727 | if (rc < 0) |
| 728 | return rc; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 729 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 730 | mutex_lock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 731 | /* |
| 732 | * to make sure the synx is not lost if the process dies or |
| 733 | * synx is released before any other process gets a chance to |
| 734 | * import it. The assumption is that an import will match this |
| 735 | * and account for the extra reference. Otherwise, this will |
| 736 | * be a dangling reference and needs to be garbage collected. |
| 737 | */ |
| 738 | dma_fence_get(row->fence); |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 739 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | 9e0b697 | 2019-06-24 14:36:34 -0700 | [diff] [blame] | 740 | pr_debug("Exit %s\n", __func__); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 741 | |
| 742 | return 0; |
| 743 | } |
| 744 | |
| 745 | |
| 746 | static int synx_handle_create(struct synx_private_ioctl_arg *k_ioctl) |
| 747 | { |
| 748 | struct synx_info synx_create_info; |
| 749 | int result; |
| 750 | |
| 751 | if (k_ioctl->size != sizeof(synx_create_info)) |
| 752 | return -EINVAL; |
| 753 | |
| 754 | if (copy_from_user(&synx_create_info, |
| 755 | u64_to_user_ptr(k_ioctl->ioctl_ptr), |
| 756 | k_ioctl->size)) |
| 757 | return -EFAULT; |
| 758 | |
| 759 | result = synx_create(&synx_create_info.synx_obj, |
| 760 | synx_create_info.name); |
| 761 | |
| 762 | if (!result) |
| 763 | if (copy_to_user(u64_to_user_ptr(k_ioctl->ioctl_ptr), |
| 764 | &synx_create_info, |
| 765 | k_ioctl->size)) |
| 766 | return -EFAULT; |
| 767 | |
| 768 | return result; |
| 769 | } |
| 770 | |
| 771 | static int synx_handle_getstatus(struct synx_private_ioctl_arg *k_ioctl) |
| 772 | { |
| 773 | struct synx_signal synx_status; |
| 774 | |
| 775 | if (k_ioctl->size != sizeof(synx_status)) |
| 776 | return -EINVAL; |
| 777 | |
| 778 | if (copy_from_user(&synx_status, |
| 779 | u64_to_user_ptr(k_ioctl->ioctl_ptr), |
| 780 | k_ioctl->size)) |
| 781 | return -EFAULT; |
| 782 | |
| 783 | synx_status.synx_state = synx_get_status(synx_status.synx_obj); |
| 784 | |
| 785 | if (copy_to_user(u64_to_user_ptr(k_ioctl->ioctl_ptr), |
| 786 | &synx_status, |
| 787 | k_ioctl->size)) |
| 788 | return -EFAULT; |
| 789 | |
| 790 | return 0; |
| 791 | } |
| 792 | |
| 793 | static int synx_handle_import(struct synx_private_ioctl_arg *k_ioctl) |
| 794 | { |
| 795 | struct synx_id_info id_info; |
| 796 | |
| 797 | if (k_ioctl->size != sizeof(id_info)) |
| 798 | return -EINVAL; |
| 799 | |
| 800 | if (copy_from_user(&id_info, |
| 801 | u64_to_user_ptr(k_ioctl->ioctl_ptr), |
| 802 | k_ioctl->size)) |
| 803 | return -EFAULT; |
| 804 | |
| 805 | if (synx_import(id_info.synx_obj, id_info.secure_key, |
| 806 | &id_info.new_synx_obj)) |
| 807 | return -EINVAL; |
| 808 | |
| 809 | if (copy_to_user(u64_to_user_ptr(k_ioctl->ioctl_ptr), |
| 810 | &id_info, |
| 811 | k_ioctl->size)) |
| 812 | return -EFAULT; |
| 813 | |
| 814 | return 0; |
| 815 | } |
| 816 | |
| 817 | static int synx_handle_export(struct synx_private_ioctl_arg *k_ioctl) |
| 818 | { |
| 819 | struct synx_id_info id_info; |
| 820 | |
| 821 | if (k_ioctl->size != sizeof(id_info)) |
| 822 | return -EINVAL; |
| 823 | |
| 824 | if (copy_from_user(&id_info, |
| 825 | u64_to_user_ptr(k_ioctl->ioctl_ptr), |
| 826 | k_ioctl->size)) |
| 827 | return -EFAULT; |
| 828 | |
| 829 | if (synx_export(id_info.synx_obj, &id_info.secure_key)) |
| 830 | return -EINVAL; |
| 831 | |
| 832 | if (copy_to_user(u64_to_user_ptr(k_ioctl->ioctl_ptr), |
| 833 | &id_info, |
| 834 | k_ioctl->size)) |
| 835 | return -EFAULT; |
| 836 | |
| 837 | return 0; |
| 838 | } |
| 839 | |
| 840 | static int synx_handle_signal(struct synx_private_ioctl_arg *k_ioctl) |
| 841 | { |
| 842 | struct synx_signal synx_signal_info; |
| 843 | |
| 844 | if (k_ioctl->size != sizeof(synx_signal_info)) |
| 845 | return -EINVAL; |
| 846 | |
| 847 | if (copy_from_user(&synx_signal_info, |
| 848 | u64_to_user_ptr(k_ioctl->ioctl_ptr), |
| 849 | k_ioctl->size)) |
| 850 | return -EFAULT; |
| 851 | |
| 852 | return synx_signal(synx_signal_info.synx_obj, |
| 853 | synx_signal_info.synx_state); |
| 854 | } |
| 855 | |
| 856 | static int synx_handle_merge(struct synx_private_ioctl_arg *k_ioctl) |
| 857 | { |
| 858 | struct synx_merge synx_merge_info; |
| 859 | s32 *synx_objs; |
| 860 | u32 num_objs; |
| 861 | u32 size; |
| 862 | int result; |
| 863 | |
| 864 | if (k_ioctl->size != sizeof(synx_merge_info)) |
| 865 | return -EINVAL; |
| 866 | |
| 867 | if (copy_from_user(&synx_merge_info, |
| 868 | u64_to_user_ptr(k_ioctl->ioctl_ptr), |
| 869 | k_ioctl->size)) |
| 870 | return -EFAULT; |
| 871 | |
| 872 | if (synx_merge_info.num_objs >= SYNX_MAX_OBJS) |
| 873 | return -EINVAL; |
| 874 | |
| 875 | size = sizeof(u32) * synx_merge_info.num_objs; |
| 876 | synx_objs = kcalloc(synx_merge_info.num_objs, |
| 877 | sizeof(*synx_objs), GFP_KERNEL); |
| 878 | if (!synx_objs) |
| 879 | return -ENOMEM; |
| 880 | |
| 881 | if (copy_from_user(synx_objs, |
| 882 | u64_to_user_ptr(synx_merge_info.synx_objs), |
| 883 | sizeof(u32) * synx_merge_info.num_objs)) { |
| 884 | kfree(synx_objs); |
| 885 | return -EFAULT; |
| 886 | } |
| 887 | |
| 888 | num_objs = synx_merge_info.num_objs; |
| 889 | |
| 890 | result = synx_merge(synx_objs, |
| 891 | num_objs, |
| 892 | &synx_merge_info.merged); |
| 893 | |
| 894 | if (!result) |
| 895 | if (copy_to_user(u64_to_user_ptr(k_ioctl->ioctl_ptr), |
| 896 | &synx_merge_info, |
| 897 | k_ioctl->size)) { |
| 898 | kfree(synx_objs); |
| 899 | return -EFAULT; |
| 900 | } |
| 901 | |
| 902 | kfree(synx_objs); |
| 903 | |
| 904 | return result; |
| 905 | } |
| 906 | |
| 907 | static int synx_handle_wait(struct synx_private_ioctl_arg *k_ioctl) |
| 908 | { |
| 909 | struct synx_wait synx_wait_info; |
| 910 | |
| 911 | if (k_ioctl->size != sizeof(synx_wait_info)) |
| 912 | return -EINVAL; |
| 913 | |
| 914 | if (copy_from_user(&synx_wait_info, |
| 915 | u64_to_user_ptr(k_ioctl->ioctl_ptr), |
| 916 | k_ioctl->size)) |
| 917 | return -EFAULT; |
| 918 | |
| 919 | k_ioctl->result = synx_wait(synx_wait_info.synx_obj, |
| 920 | synx_wait_info.timeout_ms); |
| 921 | |
| 922 | return 0; |
| 923 | } |
| 924 | |
| 925 | static int synx_handle_register_user_payload( |
Sumukh Hallymysore Ravindra | 91c79a6 | 2019-09-18 12:50:20 -0700 | [diff] [blame] | 926 | struct synx_private_ioctl_arg *k_ioctl, |
| 927 | struct synx_client *client) |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 928 | { |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 929 | s32 synx_obj; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 930 | u32 state = SYNX_STATE_INVALID; |
| 931 | struct synx_userpayload_info userpayload_info; |
| 932 | struct synx_cb_data *user_payload_kernel; |
| 933 | struct synx_cb_data *user_payload_iter, *temp; |
| 934 | struct synx_table_row *row = NULL; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 935 | |
| 936 | pr_debug("Enter %s\n", __func__); |
| 937 | |
| 938 | if (k_ioctl->size != sizeof(userpayload_info)) |
| 939 | return -EINVAL; |
| 940 | |
| 941 | if (copy_from_user(&userpayload_info, |
| 942 | u64_to_user_ptr(k_ioctl->ioctl_ptr), |
| 943 | k_ioctl->size)) |
| 944 | return -EFAULT; |
| 945 | |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 946 | synx_obj = userpayload_info.synx_obj; |
| 947 | row = synx_from_handle(synx_obj); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 948 | if (!row) { |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 949 | pr_err("invalid synx: 0x%x\n", synx_obj); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 950 | return -EINVAL; |
| 951 | } |
| 952 | |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 953 | if (!client) { |
Sumukh Hallymysore Ravindra | 91c79a6 | 2019-09-18 12:50:20 -0700 | [diff] [blame] | 954 | pr_err("invalid client for process %d\n", current->pid); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 955 | return -EINVAL; |
| 956 | } |
| 957 | |
| 958 | user_payload_kernel = kzalloc(sizeof(*user_payload_kernel), GFP_KERNEL); |
| 959 | if (!user_payload_kernel) |
| 960 | return -ENOMEM; |
| 961 | |
| 962 | user_payload_kernel->client = client; |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 963 | user_payload_kernel->data.synx_obj = synx_obj; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 964 | memcpy(user_payload_kernel->data.payload_data, |
| 965 | userpayload_info.payload, |
| 966 | SYNX_PAYLOAD_WORDS * sizeof(__u64)); |
| 967 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 968 | mutex_lock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 969 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 970 | state = synx_status(row); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 971 | if (state == SYNX_STATE_SIGNALED_SUCCESS || |
| 972 | state == SYNX_STATE_SIGNALED_ERROR) { |
| 973 | user_payload_kernel->data.status = state; |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 974 | mutex_lock(&client->eventq_lock); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 975 | list_add_tail(&user_payload_kernel->list, &client->eventq); |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 976 | mutex_unlock(&client->eventq_lock); |
| 977 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 978 | wake_up_all(&client->wq); |
| 979 | return 0; |
| 980 | } |
| 981 | |
| 982 | list_for_each_entry_safe(user_payload_iter, |
| 983 | temp, &row->user_payload_list, list) { |
| 984 | if (user_payload_iter->data.payload_data[0] == |
| 985 | user_payload_kernel->data.payload_data[0] && |
| 986 | user_payload_iter->data.payload_data[1] == |
| 987 | user_payload_kernel->data.payload_data[1]) { |
| 988 | pr_err("callback already registered on 0x%x\n", |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 989 | synx_obj); |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 990 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 991 | kfree(user_payload_kernel); |
| 992 | return -EALREADY; |
| 993 | } |
| 994 | } |
| 995 | |
| 996 | list_add_tail(&user_payload_kernel->list, &row->user_payload_list); |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 997 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 998 | |
| 999 | pr_debug("Exit %s\n", __func__); |
| 1000 | return 0; |
| 1001 | } |
| 1002 | |
| 1003 | static int synx_handle_deregister_user_payload( |
Sumukh Hallymysore Ravindra | 91c79a6 | 2019-09-18 12:50:20 -0700 | [diff] [blame] | 1004 | struct synx_private_ioctl_arg *k_ioctl, |
| 1005 | struct synx_client *client) |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1006 | { |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 1007 | s32 synx_obj; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1008 | u32 state = SYNX_STATE_INVALID; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1009 | struct synx_userpayload_info userpayload_info; |
| 1010 | struct synx_cb_data *user_payload_kernel, *temp; |
| 1011 | struct synx_table_row *row = NULL; |
| 1012 | struct synx_user_payload *data = NULL; |
| 1013 | u32 match_found = 0; |
| 1014 | |
| 1015 | pr_debug("Enter %s\n", __func__); |
| 1016 | if (k_ioctl->size != sizeof(userpayload_info)) |
| 1017 | return -EINVAL; |
| 1018 | |
| 1019 | if (copy_from_user(&userpayload_info, |
| 1020 | u64_to_user_ptr(k_ioctl->ioctl_ptr), |
| 1021 | k_ioctl->size)) |
| 1022 | return -EFAULT; |
| 1023 | |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 1024 | synx_obj = userpayload_info.synx_obj; |
| 1025 | row = synx_from_handle(synx_obj); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1026 | if (!row) { |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 1027 | pr_err("invalid synx: 0x%x\n", synx_obj); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1028 | return -EINVAL; |
| 1029 | } |
| 1030 | |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1031 | if (!client) { |
Sumukh Hallymysore Ravindra | 91c79a6 | 2019-09-18 12:50:20 -0700 | [diff] [blame] | 1032 | pr_err("invalid client for process %d\n", current->pid); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1033 | return -EINVAL; |
| 1034 | } |
| 1035 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 1036 | mutex_lock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1037 | |
| 1038 | state = synx_status_locked(row); |
| 1039 | list_for_each_entry_safe(user_payload_kernel, temp, |
| 1040 | &row->user_payload_list, list) { |
| 1041 | if (user_payload_kernel->data.payload_data[0] == |
| 1042 | userpayload_info.payload[0] && |
| 1043 | user_payload_kernel->data.payload_data[1] == |
| 1044 | userpayload_info.payload[1]) { |
| 1045 | list_del_init(&user_payload_kernel->list); |
| 1046 | match_found = 1; |
| 1047 | pr_debug("registered callback removed\n"); |
| 1048 | break; |
| 1049 | } |
| 1050 | } |
| 1051 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 1052 | mutex_unlock(&synx_dev->row_locks[row->index]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1053 | |
| 1054 | if (match_found) |
| 1055 | kfree(user_payload_kernel); |
| 1056 | |
| 1057 | /* registration of cancellation cb */ |
| 1058 | if (userpayload_info.payload[2] != 0) { |
| 1059 | user_payload_kernel = kzalloc(sizeof( |
| 1060 | *user_payload_kernel), |
| 1061 | GFP_KERNEL); |
| 1062 | if (!user_payload_kernel) |
| 1063 | return -ENOMEM; |
| 1064 | |
| 1065 | data = &user_payload_kernel->data; |
| 1066 | memcpy(data->payload_data, |
| 1067 | userpayload_info.payload, |
| 1068 | SYNX_PAYLOAD_WORDS * sizeof(__u64)); |
| 1069 | |
| 1070 | user_payload_kernel->client = client; |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 1071 | data->synx_obj = synx_obj; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1072 | data->status = SYNX_CALLBACK_RESULT_CANCELED; |
| 1073 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 1074 | mutex_lock(&client->eventq_lock); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1075 | list_add_tail(&user_payload_kernel->list, &client->eventq); |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 1076 | mutex_unlock(&client->eventq_lock); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1077 | pr_debug("registered cancellation callback\n"); |
| 1078 | wake_up_all(&client->wq); |
| 1079 | } |
| 1080 | |
| 1081 | pr_debug("Exit %s\n", __func__); |
| 1082 | return 0; |
| 1083 | } |
| 1084 | |
| 1085 | static int synx_handle_bind(struct synx_private_ioctl_arg *k_ioctl) |
| 1086 | { |
| 1087 | struct synx_bind synx_bind_info; |
| 1088 | |
| 1089 | if (k_ioctl->size != sizeof(synx_bind_info)) |
| 1090 | return -EINVAL; |
| 1091 | |
| 1092 | if (copy_from_user(&synx_bind_info, |
| 1093 | u64_to_user_ptr(k_ioctl->ioctl_ptr), |
| 1094 | k_ioctl->size)) |
| 1095 | return -EFAULT; |
| 1096 | |
Jordan Crouse | 1d790b7 | 2019-02-14 16:08:29 -0700 | [diff] [blame] | 1097 | pr_debug("calling synx_bind: 0x%x\n", synx_bind_info.synx_obj); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1098 | k_ioctl->result = synx_bind(synx_bind_info.synx_obj, |
| 1099 | synx_bind_info.ext_sync_desc); |
| 1100 | |
| 1101 | return k_ioctl->result; |
| 1102 | } |
| 1103 | |
| 1104 | static int synx_handle_addrefcount(struct synx_private_ioctl_arg *k_ioctl) |
| 1105 | { |
| 1106 | struct synx_addrefcount addrefcount_info; |
| 1107 | |
| 1108 | if (k_ioctl->size != sizeof(addrefcount_info)) |
| 1109 | return -EINVAL; |
| 1110 | |
| 1111 | if (copy_from_user(&addrefcount_info, |
| 1112 | u64_to_user_ptr(k_ioctl->ioctl_ptr), |
| 1113 | k_ioctl->size)) |
| 1114 | return -EFAULT; |
| 1115 | |
| 1116 | pr_debug("calling synx_addrefcount: 0x%x, %d\n", |
| 1117 | addrefcount_info.synx_obj, addrefcount_info.count); |
| 1118 | k_ioctl->result = synx_addrefcount(addrefcount_info.synx_obj, |
| 1119 | addrefcount_info.count); |
| 1120 | |
| 1121 | return k_ioctl->result; |
| 1122 | } |
| 1123 | |
| 1124 | static int synx_handle_release(struct synx_private_ioctl_arg *k_ioctl) |
| 1125 | { |
| 1126 | struct synx_info info; |
| 1127 | |
| 1128 | if (k_ioctl->size != sizeof(info)) |
| 1129 | return -EINVAL; |
| 1130 | |
| 1131 | if (copy_from_user(&info, |
| 1132 | u64_to_user_ptr(k_ioctl->ioctl_ptr), |
| 1133 | k_ioctl->size)) |
| 1134 | return -EFAULT; |
| 1135 | |
| 1136 | return synx_release(info.synx_obj); |
| 1137 | } |
| 1138 | |
| 1139 | static struct synx_device *get_synx_device(struct file *filep) |
| 1140 | { |
| 1141 | struct synx_client *client = filep->private_data; |
| 1142 | |
| 1143 | return client->device; |
| 1144 | } |
| 1145 | |
| 1146 | static long synx_ioctl(struct file *filep, |
| 1147 | unsigned int cmd, |
| 1148 | unsigned long arg) |
| 1149 | { |
| 1150 | s32 rc = 0; |
| 1151 | struct synx_device *synx_dev = NULL; |
Sumukh Hallymysore Ravindra | 91c79a6 | 2019-09-18 12:50:20 -0700 | [diff] [blame] | 1152 | struct synx_client *client; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1153 | struct synx_private_ioctl_arg k_ioctl; |
| 1154 | |
| 1155 | pr_debug("Enter %s\n", __func__); |
| 1156 | |
| 1157 | synx_dev = get_synx_device(filep); |
Sumukh Hallymysore Ravindra | 91c79a6 | 2019-09-18 12:50:20 -0700 | [diff] [blame] | 1158 | client = filep->private_data; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1159 | |
| 1160 | if (cmd != SYNX_PRIVATE_IOCTL_CMD) { |
| 1161 | pr_err("invalid ioctl cmd\n"); |
| 1162 | return -ENOIOCTLCMD; |
| 1163 | } |
| 1164 | |
| 1165 | if (copy_from_user(&k_ioctl, |
| 1166 | (struct synx_private_ioctl_arg *)arg, |
| 1167 | sizeof(k_ioctl))) { |
| 1168 | pr_err("invalid ioctl args\n"); |
| 1169 | return -EFAULT; |
| 1170 | } |
| 1171 | |
| 1172 | if (!k_ioctl.ioctl_ptr) |
| 1173 | return -EINVAL; |
| 1174 | |
| 1175 | switch (k_ioctl.id) { |
| 1176 | case SYNX_CREATE: |
| 1177 | rc = synx_handle_create(&k_ioctl); |
| 1178 | break; |
| 1179 | case SYNX_RELEASE: |
| 1180 | rc = synx_handle_release(&k_ioctl); |
| 1181 | break; |
| 1182 | case SYNX_REGISTER_PAYLOAD: |
| 1183 | rc = synx_handle_register_user_payload( |
Sumukh Hallymysore Ravindra | 91c79a6 | 2019-09-18 12:50:20 -0700 | [diff] [blame] | 1184 | &k_ioctl, client); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1185 | break; |
| 1186 | case SYNX_DEREGISTER_PAYLOAD: |
| 1187 | rc = synx_handle_deregister_user_payload( |
Sumukh Hallymysore Ravindra | 91c79a6 | 2019-09-18 12:50:20 -0700 | [diff] [blame] | 1188 | &k_ioctl, client); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1189 | break; |
| 1190 | case SYNX_SIGNAL: |
| 1191 | rc = synx_handle_signal(&k_ioctl); |
| 1192 | break; |
| 1193 | case SYNX_MERGE: |
| 1194 | rc = synx_handle_merge(&k_ioctl); |
| 1195 | break; |
| 1196 | case SYNX_WAIT: |
| 1197 | rc = synx_handle_wait(&k_ioctl); |
| 1198 | if (copy_to_user((void *)arg, |
| 1199 | &k_ioctl, |
| 1200 | sizeof(k_ioctl))) { |
| 1201 | pr_err("invalid ioctl args\n"); |
| 1202 | rc = -EFAULT; |
| 1203 | } |
| 1204 | break; |
| 1205 | case SYNX_BIND: |
| 1206 | rc = synx_handle_bind(&k_ioctl); |
| 1207 | break; |
| 1208 | case SYNX_ADDREFCOUNT: |
| 1209 | rc = synx_handle_addrefcount(&k_ioctl); |
| 1210 | break; |
| 1211 | case SYNX_GETSTATUS: |
| 1212 | rc = synx_handle_getstatus(&k_ioctl); |
| 1213 | break; |
| 1214 | case SYNX_IMPORT: |
| 1215 | rc = synx_handle_import(&k_ioctl); |
| 1216 | break; |
| 1217 | case SYNX_EXPORT: |
| 1218 | rc = synx_handle_export(&k_ioctl); |
| 1219 | break; |
| 1220 | default: |
| 1221 | rc = -EINVAL; |
| 1222 | } |
| 1223 | |
| 1224 | pr_debug("Exit %s\n", __func__); |
| 1225 | return rc; |
| 1226 | } |
| 1227 | |
| 1228 | static ssize_t synx_read(struct file *filep, |
| 1229 | char __user *buf, size_t size, loff_t *f_pos) |
| 1230 | { |
| 1231 | ssize_t rc = 0; |
| 1232 | struct synx_client *client = NULL; |
| 1233 | struct synx_cb_data *user_payload_kernel; |
| 1234 | |
| 1235 | pr_debug("Enter %s\n", __func__); |
| 1236 | |
| 1237 | client = filep->private_data; |
| 1238 | |
| 1239 | if (size != sizeof(struct synx_user_payload)) { |
| 1240 | pr_err("invalid read size\n"); |
| 1241 | return -EINVAL; |
| 1242 | } |
| 1243 | |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 1244 | mutex_lock(&client->eventq_lock); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1245 | user_payload_kernel = list_first_entry_or_null( |
| 1246 | &client->eventq, |
| 1247 | struct synx_cb_data, |
| 1248 | list); |
| 1249 | if (!user_payload_kernel) { |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 1250 | mutex_unlock(&client->eventq_lock); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1251 | return 0; |
| 1252 | } |
| 1253 | list_del_init(&user_payload_kernel->list); |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 1254 | mutex_unlock(&client->eventq_lock); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1255 | |
| 1256 | rc = size; |
| 1257 | if (copy_to_user(buf, |
| 1258 | &user_payload_kernel->data, |
| 1259 | sizeof(struct synx_user_payload))) { |
| 1260 | pr_err("couldn't copy user callback data\n"); |
| 1261 | rc = -EFAULT; |
| 1262 | } |
| 1263 | kfree(user_payload_kernel); |
| 1264 | |
| 1265 | pr_debug("Exit %s\n", __func__); |
| 1266 | return rc; |
| 1267 | } |
| 1268 | |
| 1269 | static unsigned int synx_poll(struct file *filep, |
| 1270 | struct poll_table_struct *poll_table) |
| 1271 | { |
| 1272 | int rc = 0; |
| 1273 | struct synx_client *client = NULL; |
| 1274 | |
| 1275 | pr_debug("Enter %s\n", __func__); |
| 1276 | |
| 1277 | client = filep->private_data; |
| 1278 | |
| 1279 | poll_wait(filep, &client->wq, poll_table); |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 1280 | mutex_lock(&client->eventq_lock); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1281 | /* if list has pending cb events, notify */ |
| 1282 | if (!list_empty(&client->eventq)) |
| 1283 | rc = POLLPRI; |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 1284 | mutex_unlock(&client->eventq_lock); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1285 | |
| 1286 | pr_debug("Exit %s\n", __func__); |
| 1287 | |
| 1288 | return rc; |
| 1289 | } |
| 1290 | |
| 1291 | static int synx_open(struct inode *inode, struct file *filep) |
| 1292 | { |
| 1293 | struct synx_device *synx_dev = NULL; |
| 1294 | struct synx_client *client = NULL; |
| 1295 | |
Sumukh Hallymysore Ravindra | 91c79a6 | 2019-09-18 12:50:20 -0700 | [diff] [blame] | 1296 | pr_debug("Enter %s from pid: %d\n", __func__, current->pid); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1297 | |
| 1298 | synx_dev = container_of(inode->i_cdev, struct synx_device, cdev); |
| 1299 | |
| 1300 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
| 1301 | if (!client) |
| 1302 | return -ENOMEM; |
| 1303 | |
| 1304 | client->device = synx_dev; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1305 | init_waitqueue_head(&client->wq); |
| 1306 | INIT_LIST_HEAD(&client->eventq); |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 1307 | mutex_init(&client->eventq_lock); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1308 | |
| 1309 | mutex_lock(&synx_dev->table_lock); |
| 1310 | list_add_tail(&client->list, &synx_dev->client_list); |
| 1311 | synx_dev->open_cnt++; |
| 1312 | mutex_unlock(&synx_dev->table_lock); |
| 1313 | |
| 1314 | filep->private_data = client; |
| 1315 | |
| 1316 | pr_debug("Exit %s\n", __func__); |
| 1317 | |
| 1318 | return 0; |
| 1319 | } |
| 1320 | |
Sumukh Hallymysore Ravindra | 38f7bb3 | 2019-12-04 15:31:50 -0800 | [diff] [blame] | 1321 | static void synx_object_cleanup(struct synx_client *client) |
| 1322 | { |
| 1323 | int i; |
| 1324 | struct synx_cb_data *payload_info, *temp_payload_info; |
| 1325 | |
| 1326 | for (i = 1; i < SYNX_MAX_OBJS; i++) { |
| 1327 | struct synx_table_row *row = |
| 1328 | synx_dev->synx_table + i; |
| 1329 | |
Sumukh Hallymysore Ravindra | 709d212 | 2020-05-20 12:53:14 +0530 | [diff] [blame^] | 1330 | mutex_lock(&synx_dev->row_locks[i]); |
Sumukh Hallymysore Ravindra | 38f7bb3 | 2019-12-04 15:31:50 -0800 | [diff] [blame] | 1331 | if (row->index) { |
| 1332 | list_for_each_entry_safe(payload_info, |
| 1333 | temp_payload_info, |
| 1334 | &row->user_payload_list, list) { |
| 1335 | if (payload_info->client == client) { |
| 1336 | list_del_init(&payload_info->list); |
| 1337 | kfree(payload_info); |
| 1338 | pr_debug("cleaned up client payload\n"); |
| 1339 | } |
| 1340 | } |
| 1341 | } |
Sumukh Hallymysore Ravindra | 709d212 | 2020-05-20 12:53:14 +0530 | [diff] [blame^] | 1342 | mutex_unlock(&synx_dev->row_locks[i]); |
Sumukh Hallymysore Ravindra | 38f7bb3 | 2019-12-04 15:31:50 -0800 | [diff] [blame] | 1343 | } |
| 1344 | } |
| 1345 | |
Sumukh Hallymysore Ravindra | 7df2622 | 2019-09-27 11:33:07 -0700 | [diff] [blame] | 1346 | static void synx_table_cleanup(void) |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1347 | { |
| 1348 | int rc = 0; |
| 1349 | int i; |
Sumukh Hallymysore Ravindra | b588aa1 | 2019-07-17 09:57:41 -0700 | [diff] [blame] | 1350 | struct synx_import_data *data, *tmp_data; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1351 | |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1352 | synx_dev->open_cnt--; |
| 1353 | if (!synx_dev->open_cnt) { |
| 1354 | for (i = 1; i < SYNX_MAX_OBJS; i++) { |
| 1355 | struct synx_table_row *row = |
| 1356 | synx_dev->synx_table + i; |
| 1357 | /* |
| 1358 | * signal all ACTIVE objects as ERR, but we don't care |
| 1359 | * about the return status here apart from logging it. |
| 1360 | */ |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 1361 | if (row->index && !is_merged_synx(row) && |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1362 | (synx_status(row) == SYNX_STATE_ACTIVE)) { |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 1363 | pr_debug("synx still active at shutdown at %d\n", |
| 1364 | row->index); |
Sumukh Hallymysore Ravindra | eb85bfd | 2019-02-14 12:01:18 -0800 | [diff] [blame] | 1365 | rc = synx_signal_core(row, |
| 1366 | SYNX_STATE_SIGNALED_ERROR); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1367 | if (rc < 0) |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 1368 | pr_err("cleanup signal fail at %d\n", |
| 1369 | row->index); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1370 | } |
| 1371 | } |
| 1372 | |
| 1373 | /* |
| 1374 | * flush the work queue to wait for pending signal callbacks |
| 1375 | * to finish |
| 1376 | */ |
| 1377 | flush_workqueue(synx_dev->work_queue); |
| 1378 | |
| 1379 | /* |
Sumukh Hallymysore Ravindra | b588aa1 | 2019-07-17 09:57:41 -0700 | [diff] [blame] | 1380 | * now that all objs have been signaled, destroy remaining |
| 1381 | * synx objs. |
| 1382 | * Start with merged synx objs, thereby releasing references |
| 1383 | * owned by the merged obj on its constituing synx objs. |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1384 | */ |
| 1385 | for (i = 1; i < SYNX_MAX_OBJS; i++) { |
| 1386 | struct synx_table_row *row = |
| 1387 | synx_dev->synx_table + i; |
| 1388 | |
Sumukh Hallymysore Ravindra | b588aa1 | 2019-07-17 09:57:41 -0700 | [diff] [blame] | 1389 | if (row->index && is_merged_synx(row)) { |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 1390 | rc = synx_release_core(row); |
Sumukh Hallymysore Ravindra | b588aa1 | 2019-07-17 09:57:41 -0700 | [diff] [blame] | 1391 | if (rc < 0) |
Sumukh Hallymysore Ravindra | b28b8b8 | 2019-07-16 16:11:05 -0700 | [diff] [blame] | 1392 | pr_err("cleanup destroy fail at %d\n", |
| 1393 | row->index); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1394 | } |
| 1395 | } |
Sumukh Hallymysore Ravindra | b588aa1 | 2019-07-17 09:57:41 -0700 | [diff] [blame] | 1396 | |
| 1397 | for (i = 1; i < SYNX_MAX_OBJS; i++) { |
| 1398 | struct synx_table_row *row = |
| 1399 | synx_dev->synx_table + i; |
| 1400 | /* |
| 1401 | * iterate till all un-cleared reference/s for |
| 1402 | * synx obj is released since synx_release_core |
| 1403 | * removes only one reference per invocation. |
| 1404 | */ |
| 1405 | while (row->index) { |
| 1406 | rc = synx_release_core(row); |
| 1407 | if (rc < 0) |
| 1408 | pr_err("cleanup destroy fail at %d\n", |
| 1409 | row->index); |
| 1410 | } |
| 1411 | } |
| 1412 | |
| 1413 | /* clean remaining un-imported synx data */ |
| 1414 | list_for_each_entry_safe(data, tmp_data, |
| 1415 | &synx_dev->import_list, list) { |
| 1416 | pr_debug("clearing import data 0x%x\n", |
| 1417 | data->synx_obj); |
| 1418 | list_del_init(&data->list); |
| 1419 | kfree(data); |
| 1420 | } |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1421 | } |
Sumukh Hallymysore Ravindra | 7df2622 | 2019-09-27 11:33:07 -0700 | [diff] [blame] | 1422 | } |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1423 | |
Sumukh Hallymysore Ravindra | 7df2622 | 2019-09-27 11:33:07 -0700 | [diff] [blame] | 1424 | static int synx_close(struct inode *inode, struct file *filep) |
| 1425 | { |
| 1426 | struct synx_device *synx_dev = NULL; |
| 1427 | struct synx_client *client; |
| 1428 | |
| 1429 | pr_debug("Enter %s from pid: %d\n", __func__, current->pid); |
| 1430 | |
| 1431 | synx_dev = get_synx_device(filep); |
| 1432 | client = filep->private_data; |
| 1433 | |
| 1434 | mutex_lock(&synx_dev->table_lock); |
Sumukh Hallymysore Ravindra | 38f7bb3 | 2019-12-04 15:31:50 -0800 | [diff] [blame] | 1435 | synx_object_cleanup(client); |
Sumukh Hallymysore Ravindra | 7df2622 | 2019-09-27 11:33:07 -0700 | [diff] [blame] | 1436 | synx_table_cleanup(); |
Sumukh Hallymysore Ravindra | 91c79a6 | 2019-09-18 12:50:20 -0700 | [diff] [blame] | 1437 | list_del_init(&client->list); |
| 1438 | kfree(client); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1439 | mutex_unlock(&synx_dev->table_lock); |
| 1440 | |
| 1441 | pr_debug("Exit %s\n", __func__); |
| 1442 | |
| 1443 | return 0; |
| 1444 | } |
| 1445 | |
| 1446 | static const struct file_operations synx_fops = { |
| 1447 | .owner = THIS_MODULE, |
| 1448 | .open = synx_open, |
| 1449 | .read = synx_read, |
Sumukh Hallymysore Ravindra | a7c3414 | 2019-04-10 13:08:35 -0700 | [diff] [blame] | 1450 | .release = synx_close, |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1451 | .poll = synx_poll, |
| 1452 | .unlocked_ioctl = synx_ioctl, |
Sumukh Hallymysore Ravindra | 0be37d3 | 2019-03-13 19:57:42 -0700 | [diff] [blame] | 1453 | #ifdef CONFIG_COMPAT |
| 1454 | .compat_ioctl = synx_ioctl, |
| 1455 | #endif |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1456 | }; |
| 1457 | |
Sumukh Hallymysore Ravindra | 7df2622 | 2019-09-27 11:33:07 -0700 | [diff] [blame] | 1458 | int synx_initialize(struct synx_initialization_params *params) |
| 1459 | { |
| 1460 | pr_debug("Enter %s from pid: %d\n", __func__, current->pid); |
| 1461 | |
| 1462 | mutex_lock(&synx_dev->table_lock); |
| 1463 | synx_dev->open_cnt++; |
| 1464 | mutex_unlock(&synx_dev->table_lock); |
| 1465 | |
| 1466 | if (params) |
| 1467 | pr_debug("synx client session initialized for %s\n", |
| 1468 | params->name); |
| 1469 | return 0; |
| 1470 | } |
| 1471 | |
| 1472 | int synx_uninitialize(void) |
| 1473 | { |
| 1474 | pr_debug("Enter %s from pid: %d\n", |
| 1475 | __func__, current->pid); |
| 1476 | |
| 1477 | mutex_lock(&synx_dev->table_lock); |
| 1478 | synx_table_cleanup(); |
| 1479 | mutex_unlock(&synx_dev->table_lock); |
| 1480 | |
| 1481 | return 0; |
| 1482 | } |
| 1483 | |
Sumukh Hallymysore Ravindra | 6b7d025 | 2019-06-12 14:05:18 -0700 | [diff] [blame] | 1484 | int synx_register_ops(const struct synx_register_params *params) |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1485 | { |
Sumukh Hallymysore Ravindra | 6b7d025 | 2019-06-12 14:05:18 -0700 | [diff] [blame] | 1486 | s32 rc; |
| 1487 | struct synx_registered_ops *client_ops; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1488 | |
Sumukh Hallymysore Ravindra | 6b7d025 | 2019-06-12 14:05:18 -0700 | [diff] [blame] | 1489 | if (!params || !params->name || |
| 1490 | !is_valid_type(params->type) || |
| 1491 | !params->ops.register_callback || |
| 1492 | !params->ops.deregister_callback || |
| 1493 | !params->ops.signal) { |
| 1494 | pr_err("invalid register params\n"); |
| 1495 | return -EINVAL; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1496 | } |
Sumukh Hallymysore Ravindra | 6b7d025 | 2019-06-12 14:05:18 -0700 | [diff] [blame] | 1497 | |
Sumukh Hallymysore Ravindra | 25871fc | 2019-10-09 11:16:22 -0700 | [diff] [blame] | 1498 | mutex_lock(&synx_dev->vtbl_lock); |
Sumukh Hallymysore Ravindra | 6b7d025 | 2019-06-12 14:05:18 -0700 | [diff] [blame] | 1499 | client_ops = &synx_dev->bind_vtbl[params->type]; |
| 1500 | if (!client_ops->valid) { |
| 1501 | client_ops->valid = true; |
| 1502 | memcpy(&client_ops->ops, ¶ms->ops, |
| 1503 | sizeof(client_ops->ops)); |
| 1504 | strlcpy(client_ops->name, params->name, |
| 1505 | sizeof(client_ops->name)); |
| 1506 | client_ops->type = params->type; |
| 1507 | pr_info("registered bind ops for %s\n", |
| 1508 | params->name); |
| 1509 | rc = 0; |
| 1510 | } else { |
| 1511 | pr_info("client already registered by %s\n", |
| 1512 | client_ops->name); |
| 1513 | rc = -EINVAL; |
| 1514 | } |
Sumukh Hallymysore Ravindra | 25871fc | 2019-10-09 11:16:22 -0700 | [diff] [blame] | 1515 | mutex_unlock(&synx_dev->vtbl_lock); |
Sumukh Hallymysore Ravindra | 6b7d025 | 2019-06-12 14:05:18 -0700 | [diff] [blame] | 1516 | |
| 1517 | return rc; |
| 1518 | } |
| 1519 | |
| 1520 | int synx_deregister_ops(const struct synx_register_params *params) |
| 1521 | { |
| 1522 | struct synx_registered_ops *client_ops; |
| 1523 | |
| 1524 | if (!params || !params->name || |
| 1525 | !is_valid_type(params->type)) { |
| 1526 | pr_err("invalid params\n"); |
| 1527 | return -EINVAL; |
| 1528 | } |
| 1529 | |
Sumukh Hallymysore Ravindra | 25871fc | 2019-10-09 11:16:22 -0700 | [diff] [blame] | 1530 | mutex_lock(&synx_dev->vtbl_lock); |
Sumukh Hallymysore Ravindra | 6b7d025 | 2019-06-12 14:05:18 -0700 | [diff] [blame] | 1531 | client_ops = &synx_dev->bind_vtbl[params->type]; |
| 1532 | memset(client_ops, 0, sizeof(*client_ops)); |
| 1533 | pr_info("deregistered bind ops for %s\n", |
| 1534 | params->name); |
Sumukh Hallymysore Ravindra | 25871fc | 2019-10-09 11:16:22 -0700 | [diff] [blame] | 1535 | mutex_unlock(&synx_dev->vtbl_lock); |
Sumukh Hallymysore Ravindra | 6b7d025 | 2019-06-12 14:05:18 -0700 | [diff] [blame] | 1536 | |
| 1537 | return 0; |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1538 | } |
| 1539 | |
| 1540 | static int __init synx_init(void) |
| 1541 | { |
| 1542 | int rc; |
| 1543 | int idx; |
| 1544 | |
| 1545 | pr_info("synx device init start\n"); |
| 1546 | |
| 1547 | synx_dev = kzalloc(sizeof(*synx_dev), GFP_KERNEL); |
| 1548 | if (!synx_dev) |
| 1549 | return -ENOMEM; |
| 1550 | |
| 1551 | mutex_init(&synx_dev->table_lock); |
Sumukh Hallymysore Ravindra | 25871fc | 2019-10-09 11:16:22 -0700 | [diff] [blame] | 1552 | mutex_init(&synx_dev->vtbl_lock); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1553 | |
| 1554 | for (idx = 0; idx < SYNX_MAX_OBJS; idx++) |
Sumukh Hallymysore Ravindra | bc18e0f | 2019-12-12 13:51:45 -0800 | [diff] [blame] | 1555 | mutex_init(&synx_dev->row_locks[idx]); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1556 | |
| 1557 | idr_init(&synx_dev->synx_ids); |
Sumukh Hallymysore Ravindra | 29edeb7 | 2019-04-12 17:50:45 -0700 | [diff] [blame] | 1558 | spin_lock_init(&synx_dev->idr_lock); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1559 | |
| 1560 | rc = alloc_chrdev_region(&synx_dev->dev, 0, 1, SYNX_DEVICE_NAME); |
| 1561 | if (rc < 0) { |
| 1562 | pr_err("region allocation failed\n"); |
| 1563 | goto alloc_fail; |
| 1564 | } |
| 1565 | |
| 1566 | cdev_init(&synx_dev->cdev, &synx_fops); |
| 1567 | synx_dev->cdev.owner = THIS_MODULE; |
| 1568 | rc = cdev_add(&synx_dev->cdev, synx_dev->dev, 1); |
| 1569 | if (rc < 0) { |
| 1570 | pr_err("device registation failed\n"); |
| 1571 | goto reg_fail; |
| 1572 | } |
| 1573 | |
| 1574 | synx_dev->class = class_create(THIS_MODULE, SYNX_DEVICE_NAME); |
| 1575 | device_create(synx_dev->class, NULL, synx_dev->dev, |
| 1576 | NULL, SYNX_DEVICE_NAME); |
| 1577 | |
| 1578 | /* |
| 1579 | * we treat zero as invalid handle, so we will keep the 0th bit set |
| 1580 | * always |
| 1581 | */ |
| 1582 | set_bit(0, synx_dev->bitmap); |
| 1583 | |
| 1584 | synx_dev->work_queue = alloc_workqueue(SYNX_WORKQUEUE_NAME, |
| 1585 | WQ_HIGHPRI | WQ_UNBOUND, 1); |
| 1586 | if (!synx_dev->work_queue) { |
| 1587 | pr_err("high priority work queue creation failed\n"); |
| 1588 | rc = -EINVAL; |
| 1589 | goto fail; |
| 1590 | } |
| 1591 | |
| 1592 | INIT_LIST_HEAD(&synx_dev->client_list); |
Sumukh Hallymysore Ravindra | 9e0b697 | 2019-06-24 14:36:34 -0700 | [diff] [blame] | 1593 | INIT_LIST_HEAD(&synx_dev->import_list); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1594 | synx_dev->dma_context = dma_fence_context_alloc(1); |
| 1595 | |
Carlos Hopkins | 81eb341 | 2019-02-22 13:57:54 -0800 | [diff] [blame] | 1596 | synx_dev->debugfs_root = init_synx_debug_dir(synx_dev); |
Sumukh Hallymysore Ravindra | fdf150a | 2019-01-14 14:07:57 -0800 | [diff] [blame] | 1597 | pr_info("synx device init success\n"); |
| 1598 | |
| 1599 | return 0; |
| 1600 | |
| 1601 | fail: |
| 1602 | device_destroy(synx_dev->class, synx_dev->dev); |
| 1603 | class_destroy(synx_dev->class); |
| 1604 | reg_fail: |
| 1605 | unregister_chrdev_region(synx_dev->dev, 1); |
| 1606 | alloc_fail: |
| 1607 | mutex_destroy(&synx_dev->table_lock); |
| 1608 | idr_destroy(&synx_dev->synx_ids); |
| 1609 | kfree(synx_dev); |
| 1610 | return rc; |
| 1611 | } |
| 1612 | |
| 1613 | device_initcall(synx_init); |
| 1614 | |
| 1615 | MODULE_DESCRIPTION("Global Synx Driver"); |
| 1616 | MODULE_LICENSE("GPL v2"); |