Thomas Gleixner | 1802d0b | 2019-05-27 08:55:21 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 2 | /* |
| 3 | * Keystone Queue Manager subsystem driver |
| 4 | * |
| 5 | * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com |
| 6 | * Authors: Sandeep Nair <sandeep_n@ti.com> |
| 7 | * Cyril Chemparathy <cyril@ti.com> |
| 8 | * Santosh Shilimkar <santosh.shilimkar@ti.com> |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 9 | */ |
| 10 | |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 11 | #include <linux/debugfs.h> |
Murali Karicheri | 6e03f65 | 2017-01-06 11:05:45 -0800 | [diff] [blame] | 12 | #include <linux/dma-mapping.h> |
| 13 | #include <linux/firmware.h> |
| 14 | #include <linux/interrupt.h> |
| 15 | #include <linux/io.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/of_address.h> |
| 18 | #include <linux/of_device.h> |
| 19 | #include <linux/of_irq.h> |
| 20 | #include <linux/pm_runtime.h> |
| 21 | #include <linux/slab.h> |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 22 | #include <linux/soc/ti/knav_qmss.h> |
| 23 | |
| 24 | #include "knav_qmss.h" |
| 25 | |
| 26 | static struct knav_device *kdev; |
| 27 | static DEFINE_MUTEX(knav_dev_lock); |
| 28 | |
| 29 | /* Queue manager register indices in DTS */ |
| 30 | #define KNAV_QUEUE_PEEK_REG_INDEX 0 |
| 31 | #define KNAV_QUEUE_STATUS_REG_INDEX 1 |
| 32 | #define KNAV_QUEUE_CONFIG_REG_INDEX 2 |
| 33 | #define KNAV_QUEUE_REGION_REG_INDEX 3 |
| 34 | #define KNAV_QUEUE_PUSH_REG_INDEX 4 |
| 35 | #define KNAV_QUEUE_POP_REG_INDEX 5 |
| 36 | |
Murali Karicheri | 350601b | 2018-04-17 17:30:30 -0400 | [diff] [blame] | 37 | /* Queue manager register indices in DTS for QMSS in K2G NAVSS. |
| 38 | * There are no status and vbusm push registers on this version |
| 39 | * of QMSS. Push registers are same as pop, So all indices above 1 |
| 40 | * are to be re-defined |
| 41 | */ |
| 42 | #define KNAV_L_QUEUE_CONFIG_REG_INDEX 1 |
| 43 | #define KNAV_L_QUEUE_REGION_REG_INDEX 2 |
| 44 | #define KNAV_L_QUEUE_PUSH_REG_INDEX 3 |
| 45 | |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 46 | /* PDSP register indices in DTS */ |
| 47 | #define KNAV_QUEUE_PDSP_IRAM_REG_INDEX 0 |
| 48 | #define KNAV_QUEUE_PDSP_REGS_REG_INDEX 1 |
| 49 | #define KNAV_QUEUE_PDSP_INTD_REG_INDEX 2 |
| 50 | #define KNAV_QUEUE_PDSP_CMD_REG_INDEX 3 |
| 51 | |
| 52 | #define knav_queue_idx_to_inst(kdev, idx) \ |
| 53 | (kdev->instances + (idx << kdev->inst_shift)) |
| 54 | |
| 55 | #define for_each_handle_rcu(qh, inst) \ |
| 56 | list_for_each_entry_rcu(qh, &inst->handles, list) |
| 57 | |
| 58 | #define for_each_instance(idx, inst, kdev) \ |
| 59 | for (idx = 0, inst = kdev->instances; \ |
| 60 | idx < (kdev)->num_queues_in_use; \ |
| 61 | idx++, inst = knav_queue_idx_to_inst(kdev, idx)) |
| 62 | |
Murali Karicheri | 96ee19b | 2015-10-13 13:49:04 -0700 | [diff] [blame] | 63 | /* All firmware file names end up here. List the firmware file names below. |
| 64 | * Newest followed by older ones. Search is done from start of the array |
| 65 | * until a firmware file is found. |
| 66 | */ |
| 67 | const char *knav_acc_firmwares[] = {"ks2_qmss_pdsp_acc48.bin"}; |
| 68 | |
Murali Karicheri | a2dd687 | 2018-04-17 17:30:31 -0400 | [diff] [blame] | 69 | static bool device_ready; |
| 70 | bool knav_qmss_device_ready(void) |
| 71 | { |
| 72 | return device_ready; |
| 73 | } |
| 74 | EXPORT_SYMBOL_GPL(knav_qmss_device_ready); |
| 75 | |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 76 | /** |
| 77 | * knav_queue_notify: qmss queue notfier call |
| 78 | * |
| 79 | * @inst: qmss queue instance like accumulator |
| 80 | */ |
| 81 | void knav_queue_notify(struct knav_queue_inst *inst) |
| 82 | { |
| 83 | struct knav_queue *qh; |
| 84 | |
| 85 | if (!inst) |
| 86 | return; |
| 87 | |
| 88 | rcu_read_lock(); |
| 89 | for_each_handle_rcu(qh, inst) { |
| 90 | if (atomic_read(&qh->notifier_enabled) <= 0) |
| 91 | continue; |
| 92 | if (WARN_ON(!qh->notifier_fn)) |
| 93 | continue; |
Vasyl Gomonovych | bc3acbb | 2018-04-20 10:20:36 -0700 | [diff] [blame] | 94 | this_cpu_inc(qh->stats->notifies); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 95 | qh->notifier_fn(qh->notifier_fn_arg); |
| 96 | } |
| 97 | rcu_read_unlock(); |
| 98 | } |
| 99 | EXPORT_SYMBOL_GPL(knav_queue_notify); |
| 100 | |
| 101 | static irqreturn_t knav_queue_int_handler(int irq, void *_instdata) |
| 102 | { |
| 103 | struct knav_queue_inst *inst = _instdata; |
| 104 | |
| 105 | knav_queue_notify(inst); |
| 106 | return IRQ_HANDLED; |
| 107 | } |
| 108 | |
| 109 | static int knav_queue_setup_irq(struct knav_range_info *range, |
| 110 | struct knav_queue_inst *inst) |
| 111 | { |
| 112 | unsigned queue = inst->id - range->queue_base; |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 113 | int ret = 0, irq; |
| 114 | |
| 115 | if (range->flags & RANGE_HAS_IRQ) { |
| 116 | irq = range->irqs[queue].irq; |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 117 | ret = request_irq(irq, knav_queue_int_handler, 0, |
| 118 | inst->irq_name, inst); |
| 119 | if (ret) |
| 120 | return ret; |
| 121 | disable_irq(irq); |
Marc Zyngier | 832ad0e | 2018-10-31 08:41:34 +0000 | [diff] [blame] | 122 | if (range->irqs[queue].cpu_mask) { |
| 123 | ret = irq_set_affinity_hint(irq, range->irqs[queue].cpu_mask); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 124 | if (ret) { |
| 125 | dev_warn(range->kdev->dev, |
| 126 | "Failed to set IRQ affinity\n"); |
| 127 | return ret; |
| 128 | } |
| 129 | } |
| 130 | } |
| 131 | return ret; |
| 132 | } |
| 133 | |
| 134 | static void knav_queue_free_irq(struct knav_queue_inst *inst) |
| 135 | { |
| 136 | struct knav_range_info *range = inst->range; |
| 137 | unsigned queue = inst->id - inst->range->queue_base; |
| 138 | int irq; |
| 139 | |
| 140 | if (range->flags & RANGE_HAS_IRQ) { |
| 141 | irq = range->irqs[queue].irq; |
| 142 | irq_set_affinity_hint(irq, NULL); |
| 143 | free_irq(irq, inst); |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | static inline bool knav_queue_is_busy(struct knav_queue_inst *inst) |
| 148 | { |
| 149 | return !list_empty(&inst->handles); |
| 150 | } |
| 151 | |
| 152 | static inline bool knav_queue_is_reserved(struct knav_queue_inst *inst) |
| 153 | { |
| 154 | return inst->range->flags & RANGE_RESERVED; |
| 155 | } |
| 156 | |
| 157 | static inline bool knav_queue_is_shared(struct knav_queue_inst *inst) |
| 158 | { |
| 159 | struct knav_queue *tmp; |
| 160 | |
| 161 | rcu_read_lock(); |
| 162 | for_each_handle_rcu(tmp, inst) { |
| 163 | if (tmp->flags & KNAV_QUEUE_SHARED) { |
| 164 | rcu_read_unlock(); |
| 165 | return true; |
| 166 | } |
| 167 | } |
| 168 | rcu_read_unlock(); |
| 169 | return false; |
| 170 | } |
| 171 | |
| 172 | static inline bool knav_queue_match_type(struct knav_queue_inst *inst, |
| 173 | unsigned type) |
| 174 | { |
| 175 | if ((type == KNAV_QUEUE_QPEND) && |
| 176 | (inst->range->flags & RANGE_HAS_IRQ)) { |
| 177 | return true; |
| 178 | } else if ((type == KNAV_QUEUE_ACC) && |
| 179 | (inst->range->flags & RANGE_HAS_ACCUMULATOR)) { |
| 180 | return true; |
| 181 | } else if ((type == KNAV_QUEUE_GP) && |
| 182 | !(inst->range->flags & |
| 183 | (RANGE_HAS_ACCUMULATOR | RANGE_HAS_IRQ))) { |
| 184 | return true; |
| 185 | } |
| 186 | return false; |
| 187 | } |
| 188 | |
| 189 | static inline struct knav_queue_inst * |
| 190 | knav_queue_match_id_to_inst(struct knav_device *kdev, unsigned id) |
| 191 | { |
| 192 | struct knav_queue_inst *inst; |
| 193 | int idx; |
| 194 | |
| 195 | for_each_instance(idx, inst, kdev) { |
| 196 | if (inst->id == id) |
| 197 | return inst; |
| 198 | } |
| 199 | return NULL; |
| 200 | } |
| 201 | |
| 202 | static inline struct knav_queue_inst *knav_queue_find_by_id(int id) |
| 203 | { |
| 204 | if (kdev->base_id <= id && |
| 205 | kdev->base_id + kdev->num_queues > id) { |
| 206 | id -= kdev->base_id; |
| 207 | return knav_queue_match_id_to_inst(kdev, id); |
| 208 | } |
| 209 | return NULL; |
| 210 | } |
| 211 | |
| 212 | static struct knav_queue *__knav_queue_open(struct knav_queue_inst *inst, |
| 213 | const char *name, unsigned flags) |
| 214 | { |
| 215 | struct knav_queue *qh; |
| 216 | unsigned id; |
| 217 | int ret = 0; |
| 218 | |
| 219 | qh = devm_kzalloc(inst->kdev->dev, sizeof(*qh), GFP_KERNEL); |
| 220 | if (!qh) |
| 221 | return ERR_PTR(-ENOMEM); |
| 222 | |
Vasyl Gomonovych | bc3acbb | 2018-04-20 10:20:36 -0700 | [diff] [blame] | 223 | qh->stats = alloc_percpu(struct knav_queue_stats); |
| 224 | if (!qh->stats) { |
| 225 | ret = -ENOMEM; |
| 226 | goto err; |
| 227 | } |
| 228 | |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 229 | qh->flags = flags; |
| 230 | qh->inst = inst; |
| 231 | id = inst->id - inst->qmgr->start_queue; |
| 232 | qh->reg_push = &inst->qmgr->reg_push[id]; |
| 233 | qh->reg_pop = &inst->qmgr->reg_pop[id]; |
| 234 | qh->reg_peek = &inst->qmgr->reg_peek[id]; |
| 235 | |
| 236 | /* first opener? */ |
| 237 | if (!knav_queue_is_busy(inst)) { |
| 238 | struct knav_range_info *range = inst->range; |
| 239 | |
Ma Shimiao | aefc581 | 2017-12-16 14:45:33 -0800 | [diff] [blame] | 240 | inst->name = kstrndup(name, KNAV_NAME_SIZE - 1, GFP_KERNEL); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 241 | if (range->ops && range->ops->open_queue) |
| 242 | ret = range->ops->open_queue(range, inst, flags); |
| 243 | |
Vasyl Gomonovych | bc3acbb | 2018-04-20 10:20:36 -0700 | [diff] [blame] | 244 | if (ret) |
| 245 | goto err; |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 246 | } |
| 247 | list_add_tail_rcu(&qh->list, &inst->handles); |
| 248 | return qh; |
Vasyl Gomonovych | bc3acbb | 2018-04-20 10:20:36 -0700 | [diff] [blame] | 249 | |
| 250 | err: |
| 251 | if (qh->stats) |
| 252 | free_percpu(qh->stats); |
| 253 | devm_kfree(inst->kdev->dev, qh); |
| 254 | return ERR_PTR(ret); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 255 | } |
| 256 | |
| 257 | static struct knav_queue * |
| 258 | knav_queue_open_by_id(const char *name, unsigned id, unsigned flags) |
| 259 | { |
| 260 | struct knav_queue_inst *inst; |
| 261 | struct knav_queue *qh; |
| 262 | |
| 263 | mutex_lock(&knav_dev_lock); |
| 264 | |
| 265 | qh = ERR_PTR(-ENODEV); |
| 266 | inst = knav_queue_find_by_id(id); |
| 267 | if (!inst) |
| 268 | goto unlock_ret; |
| 269 | |
| 270 | qh = ERR_PTR(-EEXIST); |
| 271 | if (!(flags & KNAV_QUEUE_SHARED) && knav_queue_is_busy(inst)) |
| 272 | goto unlock_ret; |
| 273 | |
| 274 | qh = ERR_PTR(-EBUSY); |
| 275 | if ((flags & KNAV_QUEUE_SHARED) && |
| 276 | (knav_queue_is_busy(inst) && !knav_queue_is_shared(inst))) |
| 277 | goto unlock_ret; |
| 278 | |
| 279 | qh = __knav_queue_open(inst, name, flags); |
| 280 | |
| 281 | unlock_ret: |
| 282 | mutex_unlock(&knav_dev_lock); |
| 283 | |
| 284 | return qh; |
| 285 | } |
| 286 | |
| 287 | static struct knav_queue *knav_queue_open_by_type(const char *name, |
| 288 | unsigned type, unsigned flags) |
| 289 | { |
| 290 | struct knav_queue_inst *inst; |
| 291 | struct knav_queue *qh = ERR_PTR(-EINVAL); |
| 292 | int idx; |
| 293 | |
| 294 | mutex_lock(&knav_dev_lock); |
| 295 | |
| 296 | for_each_instance(idx, inst, kdev) { |
| 297 | if (knav_queue_is_reserved(inst)) |
| 298 | continue; |
| 299 | if (!knav_queue_match_type(inst, type)) |
| 300 | continue; |
| 301 | if (knav_queue_is_busy(inst)) |
| 302 | continue; |
| 303 | qh = __knav_queue_open(inst, name, flags); |
| 304 | goto unlock_ret; |
| 305 | } |
| 306 | |
| 307 | unlock_ret: |
| 308 | mutex_unlock(&knav_dev_lock); |
| 309 | return qh; |
| 310 | } |
| 311 | |
| 312 | static void knav_queue_set_notify(struct knav_queue_inst *inst, bool enabled) |
| 313 | { |
| 314 | struct knav_range_info *range = inst->range; |
| 315 | |
| 316 | if (range->ops && range->ops->set_notify) |
| 317 | range->ops->set_notify(range, inst, enabled); |
| 318 | } |
| 319 | |
| 320 | static int knav_queue_enable_notifier(struct knav_queue *qh) |
| 321 | { |
| 322 | struct knav_queue_inst *inst = qh->inst; |
| 323 | bool first; |
| 324 | |
| 325 | if (WARN_ON(!qh->notifier_fn)) |
| 326 | return -EINVAL; |
| 327 | |
| 328 | /* Adjust the per handle notifier count */ |
| 329 | first = (atomic_inc_return(&qh->notifier_enabled) == 1); |
| 330 | if (!first) |
| 331 | return 0; /* nothing to do */ |
| 332 | |
| 333 | /* Now adjust the per instance notifier count */ |
| 334 | first = (atomic_inc_return(&inst->num_notifiers) == 1); |
| 335 | if (first) |
| 336 | knav_queue_set_notify(inst, true); |
| 337 | |
| 338 | return 0; |
| 339 | } |
| 340 | |
| 341 | static int knav_queue_disable_notifier(struct knav_queue *qh) |
| 342 | { |
| 343 | struct knav_queue_inst *inst = qh->inst; |
| 344 | bool last; |
| 345 | |
| 346 | last = (atomic_dec_return(&qh->notifier_enabled) == 0); |
| 347 | if (!last) |
| 348 | return 0; /* nothing to do */ |
| 349 | |
| 350 | last = (atomic_dec_return(&inst->num_notifiers) == 0); |
| 351 | if (last) |
| 352 | knav_queue_set_notify(inst, false); |
| 353 | |
| 354 | return 0; |
| 355 | } |
| 356 | |
| 357 | static int knav_queue_set_notifier(struct knav_queue *qh, |
| 358 | struct knav_queue_notify_config *cfg) |
| 359 | { |
| 360 | knav_queue_notify_fn old_fn = qh->notifier_fn; |
| 361 | |
| 362 | if (!cfg) |
| 363 | return -EINVAL; |
| 364 | |
| 365 | if (!(qh->inst->range->flags & (RANGE_HAS_ACCUMULATOR | RANGE_HAS_IRQ))) |
| 366 | return -ENOTSUPP; |
| 367 | |
| 368 | if (!cfg->fn && old_fn) |
| 369 | knav_queue_disable_notifier(qh); |
| 370 | |
| 371 | qh->notifier_fn = cfg->fn; |
| 372 | qh->notifier_fn_arg = cfg->fn_arg; |
| 373 | |
| 374 | if (cfg->fn && !old_fn) |
| 375 | knav_queue_enable_notifier(qh); |
| 376 | |
| 377 | return 0; |
| 378 | } |
| 379 | |
| 380 | static int knav_gp_set_notify(struct knav_range_info *range, |
| 381 | struct knav_queue_inst *inst, |
| 382 | bool enabled) |
| 383 | { |
| 384 | unsigned queue; |
| 385 | |
| 386 | if (range->flags & RANGE_HAS_IRQ) { |
| 387 | queue = inst->id - range->queue_base; |
| 388 | if (enabled) |
| 389 | enable_irq(range->irqs[queue].irq); |
| 390 | else |
| 391 | disable_irq_nosync(range->irqs[queue].irq); |
| 392 | } |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | static int knav_gp_open_queue(struct knav_range_info *range, |
| 397 | struct knav_queue_inst *inst, unsigned flags) |
| 398 | { |
| 399 | return knav_queue_setup_irq(range, inst); |
| 400 | } |
| 401 | |
| 402 | static int knav_gp_close_queue(struct knav_range_info *range, |
| 403 | struct knav_queue_inst *inst) |
| 404 | { |
| 405 | knav_queue_free_irq(inst); |
| 406 | return 0; |
| 407 | } |
| 408 | |
| 409 | struct knav_range_ops knav_gp_range_ops = { |
| 410 | .set_notify = knav_gp_set_notify, |
| 411 | .open_queue = knav_gp_open_queue, |
| 412 | .close_queue = knav_gp_close_queue, |
| 413 | }; |
| 414 | |
| 415 | |
| 416 | static int knav_queue_get_count(void *qhandle) |
| 417 | { |
| 418 | struct knav_queue *qh = qhandle; |
| 419 | struct knav_queue_inst *inst = qh->inst; |
| 420 | |
| 421 | return readl_relaxed(&qh->reg_peek[0].entry_count) + |
| 422 | atomic_read(&inst->desc_count); |
| 423 | } |
| 424 | |
| 425 | static void knav_queue_debug_show_instance(struct seq_file *s, |
| 426 | struct knav_queue_inst *inst) |
| 427 | { |
| 428 | struct knav_device *kdev = inst->kdev; |
| 429 | struct knav_queue *qh; |
Vasyl Gomonovych | bc3acbb | 2018-04-20 10:20:36 -0700 | [diff] [blame] | 430 | int cpu = 0; |
| 431 | int pushes = 0; |
| 432 | int pops = 0; |
| 433 | int push_errors = 0; |
| 434 | int pop_errors = 0; |
| 435 | int notifies = 0; |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 436 | |
| 437 | if (!knav_queue_is_busy(inst)) |
| 438 | return; |
| 439 | |
| 440 | seq_printf(s, "\tqueue id %d (%s)\n", |
| 441 | kdev->base_id + inst->id, inst->name); |
| 442 | for_each_handle_rcu(qh, inst) { |
Vasyl Gomonovych | bc3acbb | 2018-04-20 10:20:36 -0700 | [diff] [blame] | 443 | for_each_possible_cpu(cpu) { |
| 444 | pushes += per_cpu_ptr(qh->stats, cpu)->pushes; |
| 445 | pops += per_cpu_ptr(qh->stats, cpu)->pops; |
| 446 | push_errors += per_cpu_ptr(qh->stats, cpu)->push_errors; |
| 447 | pop_errors += per_cpu_ptr(qh->stats, cpu)->pop_errors; |
| 448 | notifies += per_cpu_ptr(qh->stats, cpu)->notifies; |
| 449 | } |
| 450 | |
| 451 | seq_printf(s, "\t\thandle %p: pushes %8d, pops %8d, count %8d, notifies %8d, push errors %8d, pop errors %8d\n", |
| 452 | qh, |
| 453 | pushes, |
| 454 | pops, |
| 455 | knav_queue_get_count(qh), |
| 456 | notifies, |
| 457 | push_errors, |
| 458 | pop_errors); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 459 | } |
| 460 | } |
| 461 | |
| 462 | static int knav_queue_debug_show(struct seq_file *s, void *v) |
| 463 | { |
| 464 | struct knav_queue_inst *inst; |
| 465 | int idx; |
| 466 | |
| 467 | mutex_lock(&knav_dev_lock); |
| 468 | seq_printf(s, "%s: %u-%u\n", |
| 469 | dev_name(kdev->dev), kdev->base_id, |
| 470 | kdev->base_id + kdev->num_queues - 1); |
| 471 | for_each_instance(idx, inst, kdev) |
| 472 | knav_queue_debug_show_instance(s, inst); |
| 473 | mutex_unlock(&knav_dev_lock); |
| 474 | |
| 475 | return 0; |
| 476 | } |
| 477 | |
| 478 | static int knav_queue_debug_open(struct inode *inode, struct file *file) |
| 479 | { |
| 480 | return single_open(file, knav_queue_debug_show, NULL); |
| 481 | } |
| 482 | |
| 483 | static const struct file_operations knav_queue_debug_ops = { |
| 484 | .open = knav_queue_debug_open, |
| 485 | .read = seq_read, |
| 486 | .llseek = seq_lseek, |
| 487 | .release = single_release, |
| 488 | }; |
| 489 | |
| 490 | static inline int knav_queue_pdsp_wait(u32 * __iomem addr, unsigned timeout, |
| 491 | u32 flags) |
| 492 | { |
| 493 | unsigned long end; |
| 494 | u32 val = 0; |
| 495 | |
| 496 | end = jiffies + msecs_to_jiffies(timeout); |
| 497 | while (time_after(end, jiffies)) { |
| 498 | val = readl_relaxed(addr); |
| 499 | if (flags) |
| 500 | val &= flags; |
| 501 | if (!val) |
| 502 | break; |
| 503 | cpu_relax(); |
| 504 | } |
| 505 | return val ? -ETIMEDOUT : 0; |
| 506 | } |
| 507 | |
| 508 | |
| 509 | static int knav_queue_flush(struct knav_queue *qh) |
| 510 | { |
| 511 | struct knav_queue_inst *inst = qh->inst; |
| 512 | unsigned id = inst->id - inst->qmgr->start_queue; |
| 513 | |
| 514 | atomic_set(&inst->desc_count, 0); |
| 515 | writel_relaxed(0, &inst->qmgr->reg_push[id].ptr_size_thresh); |
| 516 | return 0; |
| 517 | } |
| 518 | |
| 519 | /** |
| 520 | * knav_queue_open() - open a hardware queue |
| 521 | * @name - name to give the queue handle |
| 522 | * @id - desired queue number if any or specifes the type |
| 523 | * of queue |
| 524 | * @flags - the following flags are applicable to queues: |
| 525 | * KNAV_QUEUE_SHARED - allow the queue to be shared. Queues are |
| 526 | * exclusive by default. |
| 527 | * Subsequent attempts to open a shared queue should |
| 528 | * also have this flag. |
| 529 | * |
| 530 | * Returns a handle to the open hardware queue if successful. Use IS_ERR() |
| 531 | * to check the returned value for error codes. |
| 532 | */ |
| 533 | void *knav_queue_open(const char *name, unsigned id, |
| 534 | unsigned flags) |
| 535 | { |
| 536 | struct knav_queue *qh = ERR_PTR(-EINVAL); |
| 537 | |
| 538 | switch (id) { |
| 539 | case KNAV_QUEUE_QPEND: |
| 540 | case KNAV_QUEUE_ACC: |
| 541 | case KNAV_QUEUE_GP: |
| 542 | qh = knav_queue_open_by_type(name, id, flags); |
| 543 | break; |
| 544 | |
| 545 | default: |
| 546 | qh = knav_queue_open_by_id(name, id, flags); |
| 547 | break; |
| 548 | } |
| 549 | return qh; |
| 550 | } |
| 551 | EXPORT_SYMBOL_GPL(knav_queue_open); |
| 552 | |
| 553 | /** |
| 554 | * knav_queue_close() - close a hardware queue handle |
| 555 | * @qh - handle to close |
| 556 | */ |
| 557 | void knav_queue_close(void *qhandle) |
| 558 | { |
| 559 | struct knav_queue *qh = qhandle; |
| 560 | struct knav_queue_inst *inst = qh->inst; |
| 561 | |
| 562 | while (atomic_read(&qh->notifier_enabled) > 0) |
| 563 | knav_queue_disable_notifier(qh); |
| 564 | |
| 565 | mutex_lock(&knav_dev_lock); |
| 566 | list_del_rcu(&qh->list); |
| 567 | mutex_unlock(&knav_dev_lock); |
| 568 | synchronize_rcu(); |
| 569 | if (!knav_queue_is_busy(inst)) { |
| 570 | struct knav_range_info *range = inst->range; |
| 571 | |
| 572 | if (range->ops && range->ops->close_queue) |
| 573 | range->ops->close_queue(range, inst); |
| 574 | } |
Vasyl Gomonovych | bc3acbb | 2018-04-20 10:20:36 -0700 | [diff] [blame] | 575 | free_percpu(qh->stats); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 576 | devm_kfree(inst->kdev->dev, qh); |
| 577 | } |
| 578 | EXPORT_SYMBOL_GPL(knav_queue_close); |
| 579 | |
| 580 | /** |
| 581 | * knav_queue_device_control() - Perform control operations on a queue |
| 582 | * @qh - queue handle |
| 583 | * @cmd - control commands |
| 584 | * @arg - command argument |
| 585 | * |
| 586 | * Returns 0 on success, errno otherwise. |
| 587 | */ |
| 588 | int knav_queue_device_control(void *qhandle, enum knav_queue_ctrl_cmd cmd, |
| 589 | unsigned long arg) |
| 590 | { |
| 591 | struct knav_queue *qh = qhandle; |
| 592 | struct knav_queue_notify_config *cfg; |
| 593 | int ret; |
| 594 | |
| 595 | switch ((int)cmd) { |
| 596 | case KNAV_QUEUE_GET_ID: |
| 597 | ret = qh->inst->kdev->base_id + qh->inst->id; |
| 598 | break; |
| 599 | |
| 600 | case KNAV_QUEUE_FLUSH: |
| 601 | ret = knav_queue_flush(qh); |
| 602 | break; |
| 603 | |
| 604 | case KNAV_QUEUE_SET_NOTIFIER: |
| 605 | cfg = (void *)arg; |
| 606 | ret = knav_queue_set_notifier(qh, cfg); |
| 607 | break; |
| 608 | |
| 609 | case KNAV_QUEUE_ENABLE_NOTIFY: |
| 610 | ret = knav_queue_enable_notifier(qh); |
| 611 | break; |
| 612 | |
| 613 | case KNAV_QUEUE_DISABLE_NOTIFY: |
| 614 | ret = knav_queue_disable_notifier(qh); |
| 615 | break; |
| 616 | |
| 617 | case KNAV_QUEUE_GET_COUNT: |
| 618 | ret = knav_queue_get_count(qh); |
| 619 | break; |
| 620 | |
| 621 | default: |
| 622 | ret = -ENOTSUPP; |
| 623 | break; |
| 624 | } |
| 625 | return ret; |
| 626 | } |
| 627 | EXPORT_SYMBOL_GPL(knav_queue_device_control); |
| 628 | |
| 629 | |
| 630 | |
| 631 | /** |
| 632 | * knav_queue_push() - push data (or descriptor) to the tail of a queue |
| 633 | * @qh - hardware queue handle |
| 634 | * @data - data to push |
| 635 | * @size - size of data to push |
| 636 | * @flags - can be used to pass additional information |
| 637 | * |
| 638 | * Returns 0 on success, errno otherwise. |
| 639 | */ |
| 640 | int knav_queue_push(void *qhandle, dma_addr_t dma, |
| 641 | unsigned size, unsigned flags) |
| 642 | { |
| 643 | struct knav_queue *qh = qhandle; |
| 644 | u32 val; |
| 645 | |
| 646 | val = (u32)dma | ((size / 16) - 1); |
| 647 | writel_relaxed(val, &qh->reg_push[0].ptr_size_thresh); |
| 648 | |
Vasyl Gomonovych | bc3acbb | 2018-04-20 10:20:36 -0700 | [diff] [blame] | 649 | this_cpu_inc(qh->stats->pushes); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 650 | return 0; |
| 651 | } |
Murali Karicheri | 97f39af | 2015-01-29 09:04:26 -0800 | [diff] [blame] | 652 | EXPORT_SYMBOL_GPL(knav_queue_push); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 653 | |
| 654 | /** |
| 655 | * knav_queue_pop() - pop data (or descriptor) from the head of a queue |
| 656 | * @qh - hardware queue handle |
| 657 | * @size - (optional) size of the data pop'ed. |
| 658 | * |
| 659 | * Returns a DMA address on success, 0 on failure. |
| 660 | */ |
| 661 | dma_addr_t knav_queue_pop(void *qhandle, unsigned *size) |
| 662 | { |
| 663 | struct knav_queue *qh = qhandle; |
| 664 | struct knav_queue_inst *inst = qh->inst; |
| 665 | dma_addr_t dma; |
| 666 | u32 val, idx; |
| 667 | |
| 668 | /* are we accumulated? */ |
| 669 | if (inst->descs) { |
| 670 | if (unlikely(atomic_dec_return(&inst->desc_count) < 0)) { |
| 671 | atomic_inc(&inst->desc_count); |
| 672 | return 0; |
| 673 | } |
| 674 | idx = atomic_inc_return(&inst->desc_head); |
| 675 | idx &= ACC_DESCS_MASK; |
| 676 | val = inst->descs[idx]; |
| 677 | } else { |
| 678 | val = readl_relaxed(&qh->reg_pop[0].ptr_size_thresh); |
| 679 | if (unlikely(!val)) |
| 680 | return 0; |
| 681 | } |
| 682 | |
| 683 | dma = val & DESC_PTR_MASK; |
| 684 | if (size) |
| 685 | *size = ((val & DESC_SIZE_MASK) + 1) * 16; |
| 686 | |
Vasyl Gomonovych | bc3acbb | 2018-04-20 10:20:36 -0700 | [diff] [blame] | 687 | this_cpu_inc(qh->stats->pops); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 688 | return dma; |
| 689 | } |
Murali Karicheri | 97f39af | 2015-01-29 09:04:26 -0800 | [diff] [blame] | 690 | EXPORT_SYMBOL_GPL(knav_queue_pop); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 691 | |
| 692 | /* carve out descriptors and push into queue */ |
| 693 | static void kdesc_fill_pool(struct knav_pool *pool) |
| 694 | { |
| 695 | struct knav_region *region; |
| 696 | int i; |
| 697 | |
| 698 | region = pool->region; |
| 699 | pool->desc_size = region->desc_size; |
| 700 | for (i = 0; i < pool->num_desc; i++) { |
| 701 | int index = pool->region_offset + i; |
| 702 | dma_addr_t dma_addr; |
| 703 | unsigned dma_size; |
| 704 | dma_addr = region->dma_start + (region->desc_size * index); |
| 705 | dma_size = ALIGN(pool->desc_size, SMP_CACHE_BYTES); |
| 706 | dma_sync_single_for_device(pool->dev, dma_addr, dma_size, |
| 707 | DMA_TO_DEVICE); |
| 708 | knav_queue_push(pool->queue, dma_addr, dma_size, 0); |
| 709 | } |
| 710 | } |
| 711 | |
| 712 | /* pop out descriptors and close the queue */ |
| 713 | static void kdesc_empty_pool(struct knav_pool *pool) |
| 714 | { |
| 715 | dma_addr_t dma; |
| 716 | unsigned size; |
| 717 | void *desc; |
| 718 | int i; |
| 719 | |
| 720 | if (!pool->queue) |
| 721 | return; |
| 722 | |
| 723 | for (i = 0;; i++) { |
| 724 | dma = knav_queue_pop(pool->queue, &size); |
| 725 | if (!dma) |
| 726 | break; |
| 727 | desc = knav_pool_desc_dma_to_virt(pool, dma); |
| 728 | if (!desc) { |
| 729 | dev_dbg(pool->kdev->dev, |
| 730 | "couldn't unmap desc, continuing\n"); |
| 731 | continue; |
| 732 | } |
| 733 | } |
| 734 | WARN_ON(i != pool->num_desc); |
| 735 | knav_queue_close(pool->queue); |
| 736 | } |
| 737 | |
| 738 | |
| 739 | /* Get the DMA address of a descriptor */ |
| 740 | dma_addr_t knav_pool_desc_virt_to_dma(void *ph, void *virt) |
| 741 | { |
| 742 | struct knav_pool *pool = ph; |
| 743 | return pool->region->dma_start + (virt - pool->region->virt_start); |
| 744 | } |
Murali Karicheri | 97f39af | 2015-01-29 09:04:26 -0800 | [diff] [blame] | 745 | EXPORT_SYMBOL_GPL(knav_pool_desc_virt_to_dma); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 746 | |
| 747 | void *knav_pool_desc_dma_to_virt(void *ph, dma_addr_t dma) |
| 748 | { |
| 749 | struct knav_pool *pool = ph; |
| 750 | return pool->region->virt_start + (dma - pool->region->dma_start); |
| 751 | } |
Murali Karicheri | 97f39af | 2015-01-29 09:04:26 -0800 | [diff] [blame] | 752 | EXPORT_SYMBOL_GPL(knav_pool_desc_dma_to_virt); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 753 | |
| 754 | /** |
| 755 | * knav_pool_create() - Create a pool of descriptors |
| 756 | * @name - name to give the pool handle |
| 757 | * @num_desc - numbers of descriptors in the pool |
| 758 | * @region_id - QMSS region id from which the descriptors are to be |
| 759 | * allocated. |
| 760 | * |
| 761 | * Returns a pool handle on success. |
| 762 | * Use IS_ERR_OR_NULL() to identify error values on return. |
| 763 | */ |
| 764 | void *knav_pool_create(const char *name, |
| 765 | int num_desc, int region_id) |
| 766 | { |
| 767 | struct knav_region *reg_itr, *region = NULL; |
| 768 | struct knav_pool *pool, *pi; |
| 769 | struct list_head *node; |
| 770 | unsigned last_offset; |
| 771 | bool slot_found; |
| 772 | int ret; |
| 773 | |
Keerthy | 4459398 | 2017-07-31 10:01:36 +0530 | [diff] [blame] | 774 | if (!kdev) |
| 775 | return ERR_PTR(-EPROBE_DEFER); |
| 776 | |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 777 | if (!kdev->dev) |
| 778 | return ERR_PTR(-ENODEV); |
| 779 | |
| 780 | pool = devm_kzalloc(kdev->dev, sizeof(*pool), GFP_KERNEL); |
| 781 | if (!pool) { |
| 782 | dev_err(kdev->dev, "out of memory allocating pool\n"); |
| 783 | return ERR_PTR(-ENOMEM); |
| 784 | } |
| 785 | |
| 786 | for_each_region(kdev, reg_itr) { |
| 787 | if (reg_itr->id != region_id) |
| 788 | continue; |
| 789 | region = reg_itr; |
| 790 | break; |
| 791 | } |
| 792 | |
| 793 | if (!region) { |
| 794 | dev_err(kdev->dev, "region-id(%d) not found\n", region_id); |
| 795 | ret = -EINVAL; |
| 796 | goto err; |
| 797 | } |
| 798 | |
| 799 | pool->queue = knav_queue_open(name, KNAV_QUEUE_GP, 0); |
| 800 | if (IS_ERR_OR_NULL(pool->queue)) { |
| 801 | dev_err(kdev->dev, |
| 802 | "failed to open queue for pool(%s), error %ld\n", |
| 803 | name, PTR_ERR(pool->queue)); |
| 804 | ret = PTR_ERR(pool->queue); |
| 805 | goto err; |
| 806 | } |
| 807 | |
Ma Shimiao | aefc581 | 2017-12-16 14:45:33 -0800 | [diff] [blame] | 808 | pool->name = kstrndup(name, KNAV_NAME_SIZE - 1, GFP_KERNEL); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 809 | pool->kdev = kdev; |
| 810 | pool->dev = kdev->dev; |
| 811 | |
| 812 | mutex_lock(&knav_dev_lock); |
| 813 | |
| 814 | if (num_desc > (region->num_desc - region->used_desc)) { |
| 815 | dev_err(kdev->dev, "out of descs in region(%d) for pool(%s)\n", |
| 816 | region_id, name); |
| 817 | ret = -ENOMEM; |
Axel Lin | ea6d4c0 | 2014-10-27 09:37:35 -0700 | [diff] [blame] | 818 | goto err_unlock; |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 819 | } |
| 820 | |
| 821 | /* Region maintains a sorted (by region offset) list of pools |
| 822 | * use the first free slot which is large enough to accomodate |
| 823 | * the request |
| 824 | */ |
| 825 | last_offset = 0; |
| 826 | slot_found = false; |
| 827 | node = ®ion->pools; |
| 828 | list_for_each_entry(pi, ®ion->pools, region_inst) { |
| 829 | if ((pi->region_offset - last_offset) >= num_desc) { |
| 830 | slot_found = true; |
| 831 | break; |
| 832 | } |
| 833 | last_offset = pi->region_offset + pi->num_desc; |
| 834 | } |
| 835 | node = &pi->region_inst; |
| 836 | |
| 837 | if (slot_found) { |
| 838 | pool->region = region; |
| 839 | pool->num_desc = num_desc; |
| 840 | pool->region_offset = last_offset; |
| 841 | region->used_desc += num_desc; |
| 842 | list_add_tail(&pool->list, &kdev->pools); |
| 843 | list_add_tail(&pool->region_inst, node); |
| 844 | } else { |
| 845 | dev_err(kdev->dev, "pool(%s) create failed: fragmented desc pool in region(%d)\n", |
| 846 | name, region_id); |
| 847 | ret = -ENOMEM; |
Axel Lin | ea6d4c0 | 2014-10-27 09:37:35 -0700 | [diff] [blame] | 848 | goto err_unlock; |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 849 | } |
| 850 | |
| 851 | mutex_unlock(&knav_dev_lock); |
| 852 | kdesc_fill_pool(pool); |
| 853 | return pool; |
| 854 | |
Axel Lin | ea6d4c0 | 2014-10-27 09:37:35 -0700 | [diff] [blame] | 855 | err_unlock: |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 856 | mutex_unlock(&knav_dev_lock); |
Axel Lin | ea6d4c0 | 2014-10-27 09:37:35 -0700 | [diff] [blame] | 857 | err: |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 858 | kfree(pool->name); |
| 859 | devm_kfree(kdev->dev, pool); |
| 860 | return ERR_PTR(ret); |
| 861 | } |
| 862 | EXPORT_SYMBOL_GPL(knav_pool_create); |
| 863 | |
| 864 | /** |
| 865 | * knav_pool_destroy() - Free a pool of descriptors |
| 866 | * @pool - pool handle |
| 867 | */ |
| 868 | void knav_pool_destroy(void *ph) |
| 869 | { |
| 870 | struct knav_pool *pool = ph; |
| 871 | |
| 872 | if (!pool) |
| 873 | return; |
| 874 | |
| 875 | if (!pool->region) |
| 876 | return; |
| 877 | |
| 878 | kdesc_empty_pool(pool); |
| 879 | mutex_lock(&knav_dev_lock); |
| 880 | |
| 881 | pool->region->used_desc -= pool->num_desc; |
| 882 | list_del(&pool->region_inst); |
| 883 | list_del(&pool->list); |
| 884 | |
| 885 | mutex_unlock(&knav_dev_lock); |
| 886 | kfree(pool->name); |
| 887 | devm_kfree(kdev->dev, pool); |
| 888 | } |
| 889 | EXPORT_SYMBOL_GPL(knav_pool_destroy); |
| 890 | |
| 891 | |
| 892 | /** |
| 893 | * knav_pool_desc_get() - Get a descriptor from the pool |
| 894 | * @pool - pool handle |
| 895 | * |
| 896 | * Returns descriptor from the pool. |
| 897 | */ |
| 898 | void *knav_pool_desc_get(void *ph) |
| 899 | { |
| 900 | struct knav_pool *pool = ph; |
| 901 | dma_addr_t dma; |
| 902 | unsigned size; |
| 903 | void *data; |
| 904 | |
| 905 | dma = knav_queue_pop(pool->queue, &size); |
| 906 | if (unlikely(!dma)) |
| 907 | return ERR_PTR(-ENOMEM); |
| 908 | data = knav_pool_desc_dma_to_virt(pool, dma); |
| 909 | return data; |
| 910 | } |
Murali Karicheri | 97f39af | 2015-01-29 09:04:26 -0800 | [diff] [blame] | 911 | EXPORT_SYMBOL_GPL(knav_pool_desc_get); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 912 | |
| 913 | /** |
| 914 | * knav_pool_desc_put() - return a descriptor to the pool |
| 915 | * @pool - pool handle |
| 916 | */ |
| 917 | void knav_pool_desc_put(void *ph, void *desc) |
| 918 | { |
| 919 | struct knav_pool *pool = ph; |
| 920 | dma_addr_t dma; |
| 921 | dma = knav_pool_desc_virt_to_dma(pool, desc); |
| 922 | knav_queue_push(pool->queue, dma, pool->region->desc_size, 0); |
| 923 | } |
Murali Karicheri | 97f39af | 2015-01-29 09:04:26 -0800 | [diff] [blame] | 924 | EXPORT_SYMBOL_GPL(knav_pool_desc_put); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 925 | |
| 926 | /** |
| 927 | * knav_pool_desc_map() - Map descriptor for DMA transfer |
| 928 | * @pool - pool handle |
| 929 | * @desc - address of descriptor to map |
| 930 | * @size - size of descriptor to map |
| 931 | * @dma - DMA address return pointer |
| 932 | * @dma_sz - adjusted return pointer |
| 933 | * |
| 934 | * Returns 0 on success, errno otherwise. |
| 935 | */ |
| 936 | int knav_pool_desc_map(void *ph, void *desc, unsigned size, |
| 937 | dma_addr_t *dma, unsigned *dma_sz) |
| 938 | { |
| 939 | struct knav_pool *pool = ph; |
| 940 | *dma = knav_pool_desc_virt_to_dma(pool, desc); |
| 941 | size = min(size, pool->region->desc_size); |
| 942 | size = ALIGN(size, SMP_CACHE_BYTES); |
| 943 | *dma_sz = size; |
| 944 | dma_sync_single_for_device(pool->dev, *dma, size, DMA_TO_DEVICE); |
| 945 | |
| 946 | /* Ensure the descriptor reaches to the memory */ |
| 947 | __iowmb(); |
| 948 | |
| 949 | return 0; |
| 950 | } |
Murali Karicheri | 97f39af | 2015-01-29 09:04:26 -0800 | [diff] [blame] | 951 | EXPORT_SYMBOL_GPL(knav_pool_desc_map); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 952 | |
| 953 | /** |
| 954 | * knav_pool_desc_unmap() - Unmap descriptor after DMA transfer |
| 955 | * @pool - pool handle |
| 956 | * @dma - DMA address of descriptor to unmap |
| 957 | * @dma_sz - size of descriptor to unmap |
| 958 | * |
| 959 | * Returns descriptor address on success, Use IS_ERR_OR_NULL() to identify |
| 960 | * error values on return. |
| 961 | */ |
| 962 | void *knav_pool_desc_unmap(void *ph, dma_addr_t dma, unsigned dma_sz) |
| 963 | { |
| 964 | struct knav_pool *pool = ph; |
| 965 | unsigned desc_sz; |
| 966 | void *desc; |
| 967 | |
| 968 | desc_sz = min(dma_sz, pool->region->desc_size); |
| 969 | desc = knav_pool_desc_dma_to_virt(pool, dma); |
| 970 | dma_sync_single_for_cpu(pool->dev, dma, desc_sz, DMA_FROM_DEVICE); |
| 971 | prefetch(desc); |
| 972 | return desc; |
| 973 | } |
Murali Karicheri | 97f39af | 2015-01-29 09:04:26 -0800 | [diff] [blame] | 974 | EXPORT_SYMBOL_GPL(knav_pool_desc_unmap); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 975 | |
| 976 | /** |
| 977 | * knav_pool_count() - Get the number of descriptors in pool. |
| 978 | * @pool - pool handle |
| 979 | * Returns number of elements in the pool. |
| 980 | */ |
| 981 | int knav_pool_count(void *ph) |
| 982 | { |
| 983 | struct knav_pool *pool = ph; |
| 984 | return knav_queue_get_count(pool->queue); |
| 985 | } |
Murali Karicheri | 97f39af | 2015-01-29 09:04:26 -0800 | [diff] [blame] | 986 | EXPORT_SYMBOL_GPL(knav_pool_count); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 987 | |
| 988 | static void knav_queue_setup_region(struct knav_device *kdev, |
| 989 | struct knav_region *region) |
| 990 | { |
| 991 | unsigned hw_num_desc, hw_desc_size, size; |
| 992 | struct knav_reg_region __iomem *regs; |
| 993 | struct knav_qmgr_info *qmgr; |
| 994 | struct knav_pool *pool; |
| 995 | int id = region->id; |
| 996 | struct page *page; |
| 997 | |
| 998 | /* unused region? */ |
| 999 | if (!region->num_desc) { |
| 1000 | dev_warn(kdev->dev, "unused region %s\n", region->name); |
| 1001 | return; |
| 1002 | } |
| 1003 | |
| 1004 | /* get hardware descriptor value */ |
| 1005 | hw_num_desc = ilog2(region->num_desc - 1) + 1; |
| 1006 | |
| 1007 | /* did we force fit ourselves into nothingness? */ |
| 1008 | if (region->num_desc < 32) { |
| 1009 | region->num_desc = 0; |
| 1010 | dev_warn(kdev->dev, "too few descriptors in region %s\n", |
| 1011 | region->name); |
| 1012 | return; |
| 1013 | } |
| 1014 | |
| 1015 | size = region->num_desc * region->desc_size; |
| 1016 | region->virt_start = alloc_pages_exact(size, GFP_KERNEL | GFP_DMA | |
| 1017 | GFP_DMA32); |
| 1018 | if (!region->virt_start) { |
| 1019 | region->num_desc = 0; |
| 1020 | dev_err(kdev->dev, "memory alloc failed for region %s\n", |
| 1021 | region->name); |
| 1022 | return; |
| 1023 | } |
| 1024 | region->virt_end = region->virt_start + size; |
| 1025 | page = virt_to_page(region->virt_start); |
| 1026 | |
| 1027 | region->dma_start = dma_map_page(kdev->dev, page, 0, size, |
| 1028 | DMA_BIDIRECTIONAL); |
| 1029 | if (dma_mapping_error(kdev->dev, region->dma_start)) { |
| 1030 | dev_err(kdev->dev, "dma map failed for region %s\n", |
| 1031 | region->name); |
| 1032 | goto fail; |
| 1033 | } |
| 1034 | region->dma_end = region->dma_start + size; |
| 1035 | |
| 1036 | pool = devm_kzalloc(kdev->dev, sizeof(*pool), GFP_KERNEL); |
| 1037 | if (!pool) { |
| 1038 | dev_err(kdev->dev, "out of memory allocating dummy pool\n"); |
| 1039 | goto fail; |
| 1040 | } |
| 1041 | pool->num_desc = 0; |
| 1042 | pool->region_offset = region->num_desc; |
| 1043 | list_add(&pool->region_inst, ®ion->pools); |
| 1044 | |
| 1045 | dev_dbg(kdev->dev, |
Arnd Bergmann | cc0336e | 2015-12-07 15:46:59 +0100 | [diff] [blame] | 1046 | "region %s (%d): size:%d, link:%d@%d, dma:%pad-%pad, virt:%p-%p\n", |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1047 | region->name, id, region->desc_size, region->num_desc, |
Arnd Bergmann | cc0336e | 2015-12-07 15:46:59 +0100 | [diff] [blame] | 1048 | region->link_index, ®ion->dma_start, ®ion->dma_end, |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1049 | region->virt_start, region->virt_end); |
| 1050 | |
| 1051 | hw_desc_size = (region->desc_size / 16) - 1; |
| 1052 | hw_num_desc -= 5; |
| 1053 | |
| 1054 | for_each_qmgr(kdev, qmgr) { |
| 1055 | regs = qmgr->reg_region + id; |
Arnd Bergmann | cc0336e | 2015-12-07 15:46:59 +0100 | [diff] [blame] | 1056 | writel_relaxed((u32)region->dma_start, ®s->base); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1057 | writel_relaxed(region->link_index, ®s->start_index); |
| 1058 | writel_relaxed(hw_desc_size << 16 | hw_num_desc, |
| 1059 | ®s->size_count); |
| 1060 | } |
| 1061 | return; |
| 1062 | |
| 1063 | fail: |
| 1064 | if (region->dma_start) |
| 1065 | dma_unmap_page(kdev->dev, region->dma_start, size, |
| 1066 | DMA_BIDIRECTIONAL); |
| 1067 | if (region->virt_start) |
| 1068 | free_pages_exact(region->virt_start, size); |
| 1069 | region->num_desc = 0; |
| 1070 | return; |
| 1071 | } |
| 1072 | |
| 1073 | static const char *knav_queue_find_name(struct device_node *node) |
| 1074 | { |
| 1075 | const char *name; |
| 1076 | |
| 1077 | if (of_property_read_string(node, "label", &name) < 0) |
| 1078 | name = node->name; |
| 1079 | if (!name) |
| 1080 | name = "unknown"; |
| 1081 | return name; |
| 1082 | } |
| 1083 | |
| 1084 | static int knav_queue_setup_regions(struct knav_device *kdev, |
| 1085 | struct device_node *regions) |
| 1086 | { |
| 1087 | struct device *dev = kdev->dev; |
| 1088 | struct knav_region *region; |
| 1089 | struct device_node *child; |
| 1090 | u32 temp[2]; |
| 1091 | int ret; |
| 1092 | |
| 1093 | for_each_child_of_node(regions, child) { |
| 1094 | region = devm_kzalloc(dev, sizeof(*region), GFP_KERNEL); |
| 1095 | if (!region) { |
| 1096 | dev_err(dev, "out of memory allocating region\n"); |
| 1097 | return -ENOMEM; |
| 1098 | } |
| 1099 | |
| 1100 | region->name = knav_queue_find_name(child); |
| 1101 | of_property_read_u32(child, "id", ®ion->id); |
| 1102 | ret = of_property_read_u32_array(child, "region-spec", temp, 2); |
| 1103 | if (!ret) { |
| 1104 | region->num_desc = temp[0]; |
| 1105 | region->desc_size = temp[1]; |
| 1106 | } else { |
| 1107 | dev_err(dev, "invalid region info %s\n", region->name); |
| 1108 | devm_kfree(dev, region); |
| 1109 | continue; |
| 1110 | } |
| 1111 | |
| 1112 | if (!of_get_property(child, "link-index", NULL)) { |
| 1113 | dev_err(dev, "No link info for %s\n", region->name); |
| 1114 | devm_kfree(dev, region); |
| 1115 | continue; |
| 1116 | } |
| 1117 | ret = of_property_read_u32(child, "link-index", |
| 1118 | ®ion->link_index); |
| 1119 | if (ret) { |
| 1120 | dev_err(dev, "link index not found for %s\n", |
| 1121 | region->name); |
| 1122 | devm_kfree(dev, region); |
| 1123 | continue; |
| 1124 | } |
| 1125 | |
| 1126 | INIT_LIST_HEAD(®ion->pools); |
| 1127 | list_add_tail(®ion->list, &kdev->regions); |
| 1128 | } |
| 1129 | if (list_empty(&kdev->regions)) { |
| 1130 | dev_err(dev, "no valid region information found\n"); |
| 1131 | return -ENODEV; |
| 1132 | } |
| 1133 | |
| 1134 | /* Next, we run through the regions and set things up */ |
| 1135 | for_each_region(kdev, region) |
| 1136 | knav_queue_setup_region(kdev, region); |
| 1137 | |
| 1138 | return 0; |
| 1139 | } |
| 1140 | |
| 1141 | static int knav_get_link_ram(struct knav_device *kdev, |
| 1142 | const char *name, |
| 1143 | struct knav_link_ram_block *block) |
| 1144 | { |
| 1145 | struct platform_device *pdev = to_platform_device(kdev->dev); |
| 1146 | struct device_node *node = pdev->dev.of_node; |
| 1147 | u32 temp[2]; |
| 1148 | |
| 1149 | /* |
| 1150 | * Note: link ram resources are specified in "entry" sized units. In |
| 1151 | * reality, although entries are ~40bits in hardware, we treat them as |
| 1152 | * 64-bit entities here. |
| 1153 | * |
| 1154 | * For example, to specify the internal link ram for Keystone-I class |
| 1155 | * devices, we would set the linkram0 resource to 0x80000-0x83fff. |
| 1156 | * |
| 1157 | * This gets a bit weird when other link rams are used. For example, |
| 1158 | * if the range specified is 0x0c000000-0x0c003fff (i.e., 16K entries |
| 1159 | * in MSMC SRAM), the actual memory used is 0x0c000000-0x0c020000, |
| 1160 | * which accounts for 64-bits per entry, for 16K entries. |
| 1161 | */ |
| 1162 | if (!of_property_read_u32_array(node, name , temp, 2)) { |
| 1163 | if (temp[0]) { |
| 1164 | /* |
| 1165 | * queue_base specified => using internal or onchip |
| 1166 | * link ram WARNING - we do not "reserve" this block |
| 1167 | */ |
Arnd Bergmann | cc0336e | 2015-12-07 15:46:59 +0100 | [diff] [blame] | 1168 | block->dma = (dma_addr_t)temp[0]; |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1169 | block->virt = NULL; |
| 1170 | block->size = temp[1]; |
| 1171 | } else { |
| 1172 | block->size = temp[1]; |
| 1173 | /* queue_base not specific => allocate requested size */ |
| 1174 | block->virt = dmam_alloc_coherent(kdev->dev, |
Arnd Bergmann | cc0336e | 2015-12-07 15:46:59 +0100 | [diff] [blame] | 1175 | 8 * block->size, &block->dma, |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1176 | GFP_KERNEL); |
| 1177 | if (!block->virt) { |
| 1178 | dev_err(kdev->dev, "failed to alloc linkram\n"); |
| 1179 | return -ENOMEM; |
| 1180 | } |
| 1181 | } |
| 1182 | } else { |
| 1183 | return -ENODEV; |
| 1184 | } |
| 1185 | return 0; |
| 1186 | } |
| 1187 | |
| 1188 | static int knav_queue_setup_link_ram(struct knav_device *kdev) |
| 1189 | { |
| 1190 | struct knav_link_ram_block *block; |
| 1191 | struct knav_qmgr_info *qmgr; |
| 1192 | |
| 1193 | for_each_qmgr(kdev, qmgr) { |
| 1194 | block = &kdev->link_rams[0]; |
Arnd Bergmann | cc0336e | 2015-12-07 15:46:59 +0100 | [diff] [blame] | 1195 | dev_dbg(kdev->dev, "linkram0: dma:%pad, virt:%p, size:%x\n", |
| 1196 | &block->dma, block->virt, block->size); |
| 1197 | writel_relaxed((u32)block->dma, &qmgr->reg_config->link_ram_base0); |
Murali Karicheri | 350601b | 2018-04-17 17:30:30 -0400 | [diff] [blame] | 1198 | if (kdev->version == QMSS_66AK2G) |
| 1199 | writel_relaxed(block->size, |
| 1200 | &qmgr->reg_config->link_ram_size0); |
| 1201 | else |
| 1202 | writel_relaxed(block->size - 1, |
| 1203 | &qmgr->reg_config->link_ram_size0); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1204 | block++; |
| 1205 | if (!block->size) |
Michal Morawiec | f7f2bcc | 2015-11-23 10:35:21 -0800 | [diff] [blame] | 1206 | continue; |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1207 | |
Arnd Bergmann | cc0336e | 2015-12-07 15:46:59 +0100 | [diff] [blame] | 1208 | dev_dbg(kdev->dev, "linkram1: dma:%pad, virt:%p, size:%x\n", |
| 1209 | &block->dma, block->virt, block->size); |
| 1210 | writel_relaxed(block->dma, &qmgr->reg_config->link_ram_base1); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1211 | } |
| 1212 | |
| 1213 | return 0; |
| 1214 | } |
| 1215 | |
| 1216 | static int knav_setup_queue_range(struct knav_device *kdev, |
| 1217 | struct device_node *node) |
| 1218 | { |
| 1219 | struct device *dev = kdev->dev; |
| 1220 | struct knav_range_info *range; |
| 1221 | struct knav_qmgr_info *qmgr; |
| 1222 | u32 temp[2], start, end, id, index; |
| 1223 | int ret, i; |
| 1224 | |
| 1225 | range = devm_kzalloc(dev, sizeof(*range), GFP_KERNEL); |
| 1226 | if (!range) { |
| 1227 | dev_err(dev, "out of memory allocating range\n"); |
| 1228 | return -ENOMEM; |
| 1229 | } |
| 1230 | |
| 1231 | range->kdev = kdev; |
| 1232 | range->name = knav_queue_find_name(node); |
| 1233 | ret = of_property_read_u32_array(node, "qrange", temp, 2); |
| 1234 | if (!ret) { |
| 1235 | range->queue_base = temp[0] - kdev->base_id; |
| 1236 | range->num_queues = temp[1]; |
| 1237 | } else { |
| 1238 | dev_err(dev, "invalid queue range %s\n", range->name); |
| 1239 | devm_kfree(dev, range); |
| 1240 | return -EINVAL; |
| 1241 | } |
| 1242 | |
| 1243 | for (i = 0; i < RANGE_MAX_IRQS; i++) { |
| 1244 | struct of_phandle_args oirq; |
| 1245 | |
| 1246 | if (of_irq_parse_one(node, i, &oirq)) |
| 1247 | break; |
| 1248 | |
| 1249 | range->irqs[i].irq = irq_create_of_mapping(&oirq); |
| 1250 | if (range->irqs[i].irq == IRQ_NONE) |
| 1251 | break; |
| 1252 | |
| 1253 | range->num_irqs++; |
| 1254 | |
Marc Zyngier | 832ad0e | 2018-10-31 08:41:34 +0000 | [diff] [blame] | 1255 | if (IS_ENABLED(CONFIG_SMP) && oirq.args_count == 3) { |
| 1256 | unsigned long mask; |
| 1257 | int bit; |
| 1258 | |
| 1259 | range->irqs[i].cpu_mask = devm_kzalloc(dev, |
| 1260 | cpumask_size(), GFP_KERNEL); |
| 1261 | if (!range->irqs[i].cpu_mask) |
| 1262 | return -ENOMEM; |
| 1263 | |
| 1264 | mask = (oirq.args[2] & 0x0000ff00) >> 8; |
| 1265 | for_each_set_bit(bit, &mask, BITS_PER_LONG) |
| 1266 | cpumask_set_cpu(bit, range->irqs[i].cpu_mask); |
| 1267 | } |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1268 | } |
| 1269 | |
| 1270 | range->num_irqs = min(range->num_irqs, range->num_queues); |
| 1271 | if (range->num_irqs) |
| 1272 | range->flags |= RANGE_HAS_IRQ; |
| 1273 | |
| 1274 | if (of_get_property(node, "qalloc-by-id", NULL)) |
| 1275 | range->flags |= RANGE_RESERVED; |
| 1276 | |
| 1277 | if (of_get_property(node, "accumulator", NULL)) { |
| 1278 | ret = knav_init_acc_range(kdev, node, range); |
| 1279 | if (ret < 0) { |
| 1280 | devm_kfree(dev, range); |
| 1281 | return ret; |
| 1282 | } |
| 1283 | } else { |
| 1284 | range->ops = &knav_gp_range_ops; |
| 1285 | } |
| 1286 | |
| 1287 | /* set threshold to 1, and flush out the queues */ |
| 1288 | for_each_qmgr(kdev, qmgr) { |
| 1289 | start = max(qmgr->start_queue, range->queue_base); |
| 1290 | end = min(qmgr->start_queue + qmgr->num_queues, |
| 1291 | range->queue_base + range->num_queues); |
| 1292 | for (id = start; id < end; id++) { |
| 1293 | index = id - qmgr->start_queue; |
| 1294 | writel_relaxed(THRESH_GTE | 1, |
| 1295 | &qmgr->reg_peek[index].ptr_size_thresh); |
| 1296 | writel_relaxed(0, |
| 1297 | &qmgr->reg_push[index].ptr_size_thresh); |
| 1298 | } |
| 1299 | } |
| 1300 | |
| 1301 | list_add_tail(&range->list, &kdev->queue_ranges); |
| 1302 | dev_dbg(dev, "added range %s: %d-%d, %d irqs%s%s%s\n", |
| 1303 | range->name, range->queue_base, |
| 1304 | range->queue_base + range->num_queues - 1, |
| 1305 | range->num_irqs, |
| 1306 | (range->flags & RANGE_HAS_IRQ) ? ", has irq" : "", |
| 1307 | (range->flags & RANGE_RESERVED) ? ", reserved" : "", |
| 1308 | (range->flags & RANGE_HAS_ACCUMULATOR) ? ", acc" : ""); |
| 1309 | kdev->num_queues_in_use += range->num_queues; |
| 1310 | return 0; |
| 1311 | } |
| 1312 | |
| 1313 | static int knav_setup_queue_pools(struct knav_device *kdev, |
| 1314 | struct device_node *queue_pools) |
| 1315 | { |
| 1316 | struct device_node *type, *range; |
| 1317 | int ret; |
| 1318 | |
| 1319 | for_each_child_of_node(queue_pools, type) { |
| 1320 | for_each_child_of_node(type, range) { |
| 1321 | ret = knav_setup_queue_range(kdev, range); |
| 1322 | /* return value ignored, we init the rest... */ |
| 1323 | } |
| 1324 | } |
| 1325 | |
| 1326 | /* ... and barf if they all failed! */ |
| 1327 | if (list_empty(&kdev->queue_ranges)) { |
| 1328 | dev_err(kdev->dev, "no valid queue range found\n"); |
| 1329 | return -ENODEV; |
| 1330 | } |
| 1331 | return 0; |
| 1332 | } |
| 1333 | |
| 1334 | static void knav_free_queue_range(struct knav_device *kdev, |
| 1335 | struct knav_range_info *range) |
| 1336 | { |
| 1337 | if (range->ops && range->ops->free_range) |
| 1338 | range->ops->free_range(range); |
| 1339 | list_del(&range->list); |
| 1340 | devm_kfree(kdev->dev, range); |
| 1341 | } |
| 1342 | |
| 1343 | static void knav_free_queue_ranges(struct knav_device *kdev) |
| 1344 | { |
| 1345 | struct knav_range_info *range; |
| 1346 | |
| 1347 | for (;;) { |
| 1348 | range = first_queue_range(kdev); |
| 1349 | if (!range) |
| 1350 | break; |
| 1351 | knav_free_queue_range(kdev, range); |
| 1352 | } |
| 1353 | } |
| 1354 | |
| 1355 | static void knav_queue_free_regions(struct knav_device *kdev) |
| 1356 | { |
| 1357 | struct knav_region *region; |
Axel Lin | 148bb04 | 2014-11-03 10:21:54 -0800 | [diff] [blame] | 1358 | struct knav_pool *pool, *tmp; |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1359 | unsigned size; |
| 1360 | |
| 1361 | for (;;) { |
| 1362 | region = first_region(kdev); |
| 1363 | if (!region) |
| 1364 | break; |
Axel Lin | 148bb04 | 2014-11-03 10:21:54 -0800 | [diff] [blame] | 1365 | list_for_each_entry_safe(pool, tmp, ®ion->pools, region_inst) |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1366 | knav_pool_destroy(pool); |
| 1367 | |
| 1368 | size = region->virt_end - region->virt_start; |
| 1369 | if (size) |
| 1370 | free_pages_exact(region->virt_start, size); |
| 1371 | list_del(®ion->list); |
| 1372 | devm_kfree(kdev->dev, region); |
| 1373 | } |
| 1374 | } |
| 1375 | |
| 1376 | static void __iomem *knav_queue_map_reg(struct knav_device *kdev, |
| 1377 | struct device_node *node, int index) |
| 1378 | { |
| 1379 | struct resource res; |
| 1380 | void __iomem *regs; |
| 1381 | int ret; |
| 1382 | |
| 1383 | ret = of_address_to_resource(node, index, &res); |
| 1384 | if (ret) { |
Rob Herring | dc37a25 | 2018-08-27 20:02:33 -0500 | [diff] [blame] | 1385 | dev_err(kdev->dev, "Can't translate of node(%pOFn) address for index(%d)\n", |
| 1386 | node, index); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1387 | return ERR_PTR(ret); |
| 1388 | } |
| 1389 | |
| 1390 | regs = devm_ioremap_resource(kdev->dev, &res); |
| 1391 | if (IS_ERR(regs)) |
Rob Herring | dc37a25 | 2018-08-27 20:02:33 -0500 | [diff] [blame] | 1392 | dev_err(kdev->dev, "Failed to map register base for index(%d) node(%pOFn)\n", |
| 1393 | index, node); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1394 | return regs; |
| 1395 | } |
| 1396 | |
| 1397 | static int knav_queue_init_qmgrs(struct knav_device *kdev, |
| 1398 | struct device_node *qmgrs) |
| 1399 | { |
| 1400 | struct device *dev = kdev->dev; |
| 1401 | struct knav_qmgr_info *qmgr; |
| 1402 | struct device_node *child; |
| 1403 | u32 temp[2]; |
| 1404 | int ret; |
| 1405 | |
| 1406 | for_each_child_of_node(qmgrs, child) { |
| 1407 | qmgr = devm_kzalloc(dev, sizeof(*qmgr), GFP_KERNEL); |
| 1408 | if (!qmgr) { |
| 1409 | dev_err(dev, "out of memory allocating qmgr\n"); |
| 1410 | return -ENOMEM; |
| 1411 | } |
| 1412 | |
| 1413 | ret = of_property_read_u32_array(child, "managed-queues", |
| 1414 | temp, 2); |
| 1415 | if (!ret) { |
| 1416 | qmgr->start_queue = temp[0]; |
| 1417 | qmgr->num_queues = temp[1]; |
| 1418 | } else { |
| 1419 | dev_err(dev, "invalid qmgr queue range\n"); |
| 1420 | devm_kfree(dev, qmgr); |
| 1421 | continue; |
| 1422 | } |
| 1423 | |
| 1424 | dev_info(dev, "qmgr start queue %d, number of queues %d\n", |
| 1425 | qmgr->start_queue, qmgr->num_queues); |
| 1426 | |
| 1427 | qmgr->reg_peek = |
| 1428 | knav_queue_map_reg(kdev, child, |
| 1429 | KNAV_QUEUE_PEEK_REG_INDEX); |
Murali Karicheri | 350601b | 2018-04-17 17:30:30 -0400 | [diff] [blame] | 1430 | |
| 1431 | if (kdev->version == QMSS) { |
| 1432 | qmgr->reg_status = |
| 1433 | knav_queue_map_reg(kdev, child, |
| 1434 | KNAV_QUEUE_STATUS_REG_INDEX); |
| 1435 | } |
| 1436 | |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1437 | qmgr->reg_config = |
| 1438 | knav_queue_map_reg(kdev, child, |
Murali Karicheri | 350601b | 2018-04-17 17:30:30 -0400 | [diff] [blame] | 1439 | (kdev->version == QMSS_66AK2G) ? |
| 1440 | KNAV_L_QUEUE_CONFIG_REG_INDEX : |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1441 | KNAV_QUEUE_CONFIG_REG_INDEX); |
| 1442 | qmgr->reg_region = |
| 1443 | knav_queue_map_reg(kdev, child, |
Murali Karicheri | 350601b | 2018-04-17 17:30:30 -0400 | [diff] [blame] | 1444 | (kdev->version == QMSS_66AK2G) ? |
| 1445 | KNAV_L_QUEUE_REGION_REG_INDEX : |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1446 | KNAV_QUEUE_REGION_REG_INDEX); |
Murali Karicheri | 350601b | 2018-04-17 17:30:30 -0400 | [diff] [blame] | 1447 | |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1448 | qmgr->reg_push = |
| 1449 | knav_queue_map_reg(kdev, child, |
Murali Karicheri | 350601b | 2018-04-17 17:30:30 -0400 | [diff] [blame] | 1450 | (kdev->version == QMSS_66AK2G) ? |
| 1451 | KNAV_L_QUEUE_PUSH_REG_INDEX : |
| 1452 | KNAV_QUEUE_PUSH_REG_INDEX); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1453 | |
Murali Karicheri | 350601b | 2018-04-17 17:30:30 -0400 | [diff] [blame] | 1454 | if (kdev->version == QMSS) { |
| 1455 | qmgr->reg_pop = |
| 1456 | knav_queue_map_reg(kdev, child, |
| 1457 | KNAV_QUEUE_POP_REG_INDEX); |
| 1458 | } |
| 1459 | |
| 1460 | if (IS_ERR(qmgr->reg_peek) || |
| 1461 | ((kdev->version == QMSS) && |
| 1462 | (IS_ERR(qmgr->reg_status) || IS_ERR(qmgr->reg_pop))) || |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1463 | IS_ERR(qmgr->reg_config) || IS_ERR(qmgr->reg_region) || |
Murali Karicheri | 350601b | 2018-04-17 17:30:30 -0400 | [diff] [blame] | 1464 | IS_ERR(qmgr->reg_push)) { |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1465 | dev_err(dev, "failed to map qmgr regs\n"); |
Murali Karicheri | 350601b | 2018-04-17 17:30:30 -0400 | [diff] [blame] | 1466 | if (kdev->version == QMSS) { |
| 1467 | if (!IS_ERR(qmgr->reg_status)) |
| 1468 | devm_iounmap(dev, qmgr->reg_status); |
| 1469 | if (!IS_ERR(qmgr->reg_pop)) |
| 1470 | devm_iounmap(dev, qmgr->reg_pop); |
| 1471 | } |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1472 | if (!IS_ERR(qmgr->reg_peek)) |
| 1473 | devm_iounmap(dev, qmgr->reg_peek); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1474 | if (!IS_ERR(qmgr->reg_config)) |
| 1475 | devm_iounmap(dev, qmgr->reg_config); |
| 1476 | if (!IS_ERR(qmgr->reg_region)) |
| 1477 | devm_iounmap(dev, qmgr->reg_region); |
| 1478 | if (!IS_ERR(qmgr->reg_push)) |
| 1479 | devm_iounmap(dev, qmgr->reg_push); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1480 | devm_kfree(dev, qmgr); |
| 1481 | continue; |
| 1482 | } |
| 1483 | |
Murali Karicheri | 350601b | 2018-04-17 17:30:30 -0400 | [diff] [blame] | 1484 | /* Use same push register for pop as well */ |
| 1485 | if (kdev->version == QMSS_66AK2G) |
| 1486 | qmgr->reg_pop = qmgr->reg_push; |
| 1487 | |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1488 | list_add_tail(&qmgr->list, &kdev->qmgrs); |
| 1489 | dev_info(dev, "added qmgr start queue %d, num of queues %d, reg_peek %p, reg_status %p, reg_config %p, reg_region %p, reg_push %p, reg_pop %p\n", |
| 1490 | qmgr->start_queue, qmgr->num_queues, |
| 1491 | qmgr->reg_peek, qmgr->reg_status, |
| 1492 | qmgr->reg_config, qmgr->reg_region, |
| 1493 | qmgr->reg_push, qmgr->reg_pop); |
| 1494 | } |
| 1495 | return 0; |
| 1496 | } |
| 1497 | |
| 1498 | static int knav_queue_init_pdsps(struct knav_device *kdev, |
| 1499 | struct device_node *pdsps) |
| 1500 | { |
| 1501 | struct device *dev = kdev->dev; |
| 1502 | struct knav_pdsp_info *pdsp; |
| 1503 | struct device_node *child; |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1504 | |
| 1505 | for_each_child_of_node(pdsps, child) { |
| 1506 | pdsp = devm_kzalloc(dev, sizeof(*pdsp), GFP_KERNEL); |
| 1507 | if (!pdsp) { |
| 1508 | dev_err(dev, "out of memory allocating pdsp\n"); |
| 1509 | return -ENOMEM; |
| 1510 | } |
| 1511 | pdsp->name = knav_queue_find_name(child); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1512 | pdsp->iram = |
| 1513 | knav_queue_map_reg(kdev, child, |
| 1514 | KNAV_QUEUE_PDSP_IRAM_REG_INDEX); |
| 1515 | pdsp->regs = |
| 1516 | knav_queue_map_reg(kdev, child, |
| 1517 | KNAV_QUEUE_PDSP_REGS_REG_INDEX); |
| 1518 | pdsp->intd = |
| 1519 | knav_queue_map_reg(kdev, child, |
| 1520 | KNAV_QUEUE_PDSP_INTD_REG_INDEX); |
| 1521 | pdsp->command = |
| 1522 | knav_queue_map_reg(kdev, child, |
| 1523 | KNAV_QUEUE_PDSP_CMD_REG_INDEX); |
| 1524 | |
| 1525 | if (IS_ERR(pdsp->command) || IS_ERR(pdsp->iram) || |
| 1526 | IS_ERR(pdsp->regs) || IS_ERR(pdsp->intd)) { |
| 1527 | dev_err(dev, "failed to map pdsp %s regs\n", |
| 1528 | pdsp->name); |
| 1529 | if (!IS_ERR(pdsp->command)) |
| 1530 | devm_iounmap(dev, pdsp->command); |
| 1531 | if (!IS_ERR(pdsp->iram)) |
| 1532 | devm_iounmap(dev, pdsp->iram); |
| 1533 | if (!IS_ERR(pdsp->regs)) |
| 1534 | devm_iounmap(dev, pdsp->regs); |
| 1535 | if (!IS_ERR(pdsp->intd)) |
| 1536 | devm_iounmap(dev, pdsp->intd); |
| 1537 | devm_kfree(dev, pdsp); |
| 1538 | continue; |
| 1539 | } |
| 1540 | of_property_read_u32(child, "id", &pdsp->id); |
| 1541 | list_add_tail(&pdsp->list, &kdev->pdsps); |
Murali Karicheri | 96ee19b | 2015-10-13 13:49:04 -0700 | [diff] [blame] | 1542 | dev_dbg(dev, "added pdsp %s: command %p, iram %p, regs %p, intd %p\n", |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1543 | pdsp->name, pdsp->command, pdsp->iram, pdsp->regs, |
Murali Karicheri | 96ee19b | 2015-10-13 13:49:04 -0700 | [diff] [blame] | 1544 | pdsp->intd); |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1545 | } |
| 1546 | return 0; |
| 1547 | } |
| 1548 | |
| 1549 | static int knav_queue_stop_pdsp(struct knav_device *kdev, |
| 1550 | struct knav_pdsp_info *pdsp) |
| 1551 | { |
| 1552 | u32 val, timeout = 1000; |
| 1553 | int ret; |
| 1554 | |
| 1555 | val = readl_relaxed(&pdsp->regs->control) & ~PDSP_CTRL_ENABLE; |
| 1556 | writel_relaxed(val, &pdsp->regs->control); |
| 1557 | ret = knav_queue_pdsp_wait(&pdsp->regs->control, timeout, |
| 1558 | PDSP_CTRL_RUNNING); |
| 1559 | if (ret < 0) { |
| 1560 | dev_err(kdev->dev, "timed out on pdsp %s stop\n", pdsp->name); |
| 1561 | return ret; |
| 1562 | } |
Murali Karicheri | 0450169 | 2015-10-13 13:49:04 -0700 | [diff] [blame] | 1563 | pdsp->loaded = false; |
| 1564 | pdsp->started = false; |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1565 | return 0; |
| 1566 | } |
| 1567 | |
| 1568 | static int knav_queue_load_pdsp(struct knav_device *kdev, |
| 1569 | struct knav_pdsp_info *pdsp) |
| 1570 | { |
| 1571 | int i, ret, fwlen; |
| 1572 | const struct firmware *fw; |
Murali Karicheri | 96ee19b | 2015-10-13 13:49:04 -0700 | [diff] [blame] | 1573 | bool found = false; |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1574 | u32 *fwdata; |
| 1575 | |
Murali Karicheri | 96ee19b | 2015-10-13 13:49:04 -0700 | [diff] [blame] | 1576 | for (i = 0; i < ARRAY_SIZE(knav_acc_firmwares); i++) { |
| 1577 | if (knav_acc_firmwares[i]) { |
Murali Karicheri | 6af1a07 | 2015-10-19 11:09:34 -0700 | [diff] [blame] | 1578 | ret = request_firmware_direct(&fw, |
| 1579 | knav_acc_firmwares[i], |
| 1580 | kdev->dev); |
Murali Karicheri | 96ee19b | 2015-10-13 13:49:04 -0700 | [diff] [blame] | 1581 | if (!ret) { |
| 1582 | found = true; |
| 1583 | break; |
| 1584 | } |
| 1585 | } |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1586 | } |
Murali Karicheri | 96ee19b | 2015-10-13 13:49:04 -0700 | [diff] [blame] | 1587 | |
| 1588 | if (!found) { |
| 1589 | dev_err(kdev->dev, "failed to get firmware for pdsp\n"); |
| 1590 | return -ENODEV; |
| 1591 | } |
| 1592 | |
| 1593 | dev_info(kdev->dev, "firmware file %s downloaded for PDSP\n", |
| 1594 | knav_acc_firmwares[i]); |
| 1595 | |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1596 | writel_relaxed(pdsp->id + 1, pdsp->command + 0x18); |
| 1597 | /* download the firmware */ |
| 1598 | fwdata = (u32 *)fw->data; |
| 1599 | fwlen = (fw->size + sizeof(u32) - 1) / sizeof(u32); |
| 1600 | for (i = 0; i < fwlen; i++) |
| 1601 | writel_relaxed(be32_to_cpu(fwdata[i]), pdsp->iram + i); |
| 1602 | |
| 1603 | release_firmware(fw); |
| 1604 | return 0; |
| 1605 | } |
| 1606 | |
| 1607 | static int knav_queue_start_pdsp(struct knav_device *kdev, |
| 1608 | struct knav_pdsp_info *pdsp) |
| 1609 | { |
| 1610 | u32 val, timeout = 1000; |
| 1611 | int ret; |
| 1612 | |
| 1613 | /* write a command for sync */ |
| 1614 | writel_relaxed(0xffffffff, pdsp->command); |
| 1615 | while (readl_relaxed(pdsp->command) != 0xffffffff) |
| 1616 | cpu_relax(); |
| 1617 | |
| 1618 | /* soft reset the PDSP */ |
| 1619 | val = readl_relaxed(&pdsp->regs->control); |
| 1620 | val &= ~(PDSP_CTRL_PC_MASK | PDSP_CTRL_SOFT_RESET); |
| 1621 | writel_relaxed(val, &pdsp->regs->control); |
| 1622 | |
| 1623 | /* enable pdsp */ |
| 1624 | val = readl_relaxed(&pdsp->regs->control) | PDSP_CTRL_ENABLE; |
| 1625 | writel_relaxed(val, &pdsp->regs->control); |
| 1626 | |
| 1627 | /* wait for command register to clear */ |
| 1628 | ret = knav_queue_pdsp_wait(pdsp->command, timeout, 0); |
| 1629 | if (ret < 0) { |
| 1630 | dev_err(kdev->dev, |
| 1631 | "timed out on pdsp %s command register wait\n", |
| 1632 | pdsp->name); |
| 1633 | return ret; |
| 1634 | } |
| 1635 | return 0; |
| 1636 | } |
| 1637 | |
| 1638 | static void knav_queue_stop_pdsps(struct knav_device *kdev) |
| 1639 | { |
| 1640 | struct knav_pdsp_info *pdsp; |
| 1641 | |
| 1642 | /* disable all pdsps */ |
| 1643 | for_each_pdsp(kdev, pdsp) |
| 1644 | knav_queue_stop_pdsp(kdev, pdsp); |
| 1645 | } |
| 1646 | |
| 1647 | static int knav_queue_start_pdsps(struct knav_device *kdev) |
| 1648 | { |
| 1649 | struct knav_pdsp_info *pdsp; |
| 1650 | int ret; |
| 1651 | |
| 1652 | knav_queue_stop_pdsps(kdev); |
Murali Karicheri | 0450169 | 2015-10-13 13:49:04 -0700 | [diff] [blame] | 1653 | /* now load them all. We return success even if pdsp |
| 1654 | * is not loaded as acc channels are optional on having |
| 1655 | * firmware availability in the system. We set the loaded |
| 1656 | * and stated flag and when initialize the acc range, check |
| 1657 | * it and init the range only if pdsp is started. |
| 1658 | */ |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1659 | for_each_pdsp(kdev, pdsp) { |
| 1660 | ret = knav_queue_load_pdsp(kdev, pdsp); |
Murali Karicheri | 0450169 | 2015-10-13 13:49:04 -0700 | [diff] [blame] | 1661 | if (!ret) |
| 1662 | pdsp->loaded = true; |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1663 | } |
| 1664 | |
| 1665 | for_each_pdsp(kdev, pdsp) { |
Murali Karicheri | 0450169 | 2015-10-13 13:49:04 -0700 | [diff] [blame] | 1666 | if (pdsp->loaded) { |
| 1667 | ret = knav_queue_start_pdsp(kdev, pdsp); |
| 1668 | if (!ret) |
| 1669 | pdsp->started = true; |
| 1670 | } |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1671 | } |
| 1672 | return 0; |
| 1673 | } |
| 1674 | |
| 1675 | static inline struct knav_qmgr_info *knav_find_qmgr(unsigned id) |
| 1676 | { |
| 1677 | struct knav_qmgr_info *qmgr; |
| 1678 | |
| 1679 | for_each_qmgr(kdev, qmgr) { |
| 1680 | if ((id >= qmgr->start_queue) && |
| 1681 | (id < qmgr->start_queue + qmgr->num_queues)) |
| 1682 | return qmgr; |
| 1683 | } |
| 1684 | return NULL; |
| 1685 | } |
| 1686 | |
| 1687 | static int knav_queue_init_queue(struct knav_device *kdev, |
| 1688 | struct knav_range_info *range, |
| 1689 | struct knav_queue_inst *inst, |
| 1690 | unsigned id) |
| 1691 | { |
| 1692 | char irq_name[KNAV_NAME_SIZE]; |
| 1693 | inst->qmgr = knav_find_qmgr(id); |
| 1694 | if (!inst->qmgr) |
| 1695 | return -1; |
| 1696 | |
| 1697 | INIT_LIST_HEAD(&inst->handles); |
| 1698 | inst->kdev = kdev; |
| 1699 | inst->range = range; |
| 1700 | inst->irq_num = -1; |
| 1701 | inst->id = id; |
| 1702 | scnprintf(irq_name, sizeof(irq_name), "hwqueue-%d", id); |
| 1703 | inst->irq_name = kstrndup(irq_name, sizeof(irq_name), GFP_KERNEL); |
| 1704 | |
| 1705 | if (range->ops && range->ops->init_queue) |
| 1706 | return range->ops->init_queue(range, inst); |
| 1707 | else |
| 1708 | return 0; |
| 1709 | } |
| 1710 | |
| 1711 | static int knav_queue_init_queues(struct knav_device *kdev) |
| 1712 | { |
| 1713 | struct knav_range_info *range; |
| 1714 | int size, id, base_idx; |
| 1715 | int idx = 0, ret = 0; |
| 1716 | |
| 1717 | /* how much do we need for instance data? */ |
| 1718 | size = sizeof(struct knav_queue_inst); |
| 1719 | |
| 1720 | /* round this up to a power of 2, keep the index to instance |
| 1721 | * arithmetic fast. |
| 1722 | * */ |
| 1723 | kdev->inst_shift = order_base_2(size); |
| 1724 | size = (1 << kdev->inst_shift) * kdev->num_queues_in_use; |
| 1725 | kdev->instances = devm_kzalloc(kdev->dev, size, GFP_KERNEL); |
| 1726 | if (!kdev->instances) |
Axel Lin | 39179cb | 2014-10-27 09:37:35 -0700 | [diff] [blame] | 1727 | return -ENOMEM; |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1728 | |
| 1729 | for_each_queue_range(kdev, range) { |
| 1730 | if (range->ops && range->ops->init_range) |
| 1731 | range->ops->init_range(range); |
| 1732 | base_idx = idx; |
| 1733 | for (id = range->queue_base; |
| 1734 | id < range->queue_base + range->num_queues; id++, idx++) { |
| 1735 | ret = knav_queue_init_queue(kdev, range, |
| 1736 | knav_queue_idx_to_inst(kdev, idx), id); |
| 1737 | if (ret < 0) |
| 1738 | return ret; |
| 1739 | } |
| 1740 | range->queue_base_inst = |
| 1741 | knav_queue_idx_to_inst(kdev, base_idx); |
| 1742 | } |
| 1743 | return 0; |
| 1744 | } |
| 1745 | |
Murali Karicheri | 350601b | 2018-04-17 17:30:30 -0400 | [diff] [blame] | 1746 | /* Match table for of_platform binding */ |
| 1747 | static const struct of_device_id keystone_qmss_of_match[] = { |
| 1748 | { |
| 1749 | .compatible = "ti,keystone-navigator-qmss", |
| 1750 | }, |
| 1751 | { |
| 1752 | .compatible = "ti,66ak2g-navss-qm", |
| 1753 | .data = (void *)QMSS_66AK2G, |
| 1754 | }, |
| 1755 | {}, |
| 1756 | }; |
| 1757 | MODULE_DEVICE_TABLE(of, keystone_qmss_of_match); |
| 1758 | |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1759 | static int knav_queue_probe(struct platform_device *pdev) |
| 1760 | { |
| 1761 | struct device_node *node = pdev->dev.of_node; |
| 1762 | struct device_node *qmgrs, *queue_pools, *regions, *pdsps; |
Murali Karicheri | 350601b | 2018-04-17 17:30:30 -0400 | [diff] [blame] | 1763 | const struct of_device_id *match; |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1764 | struct device *dev = &pdev->dev; |
| 1765 | u32 temp[2]; |
| 1766 | int ret; |
| 1767 | |
| 1768 | if (!node) { |
| 1769 | dev_err(dev, "device tree info unavailable\n"); |
| 1770 | return -ENODEV; |
| 1771 | } |
| 1772 | |
| 1773 | kdev = devm_kzalloc(dev, sizeof(struct knav_device), GFP_KERNEL); |
| 1774 | if (!kdev) { |
| 1775 | dev_err(dev, "memory allocation failed\n"); |
| 1776 | return -ENOMEM; |
| 1777 | } |
| 1778 | |
Murali Karicheri | 350601b | 2018-04-17 17:30:30 -0400 | [diff] [blame] | 1779 | match = of_match_device(of_match_ptr(keystone_qmss_of_match), dev); |
| 1780 | if (match && match->data) |
| 1781 | kdev->version = QMSS_66AK2G; |
| 1782 | |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1783 | platform_set_drvdata(pdev, kdev); |
| 1784 | kdev->dev = dev; |
| 1785 | INIT_LIST_HEAD(&kdev->queue_ranges); |
| 1786 | INIT_LIST_HEAD(&kdev->qmgrs); |
| 1787 | INIT_LIST_HEAD(&kdev->pools); |
| 1788 | INIT_LIST_HEAD(&kdev->regions); |
| 1789 | INIT_LIST_HEAD(&kdev->pdsps); |
| 1790 | |
| 1791 | pm_runtime_enable(&pdev->dev); |
| 1792 | ret = pm_runtime_get_sync(&pdev->dev); |
| 1793 | if (ret < 0) { |
| 1794 | dev_err(dev, "Failed to enable QMSS\n"); |
| 1795 | return ret; |
| 1796 | } |
| 1797 | |
| 1798 | if (of_property_read_u32_array(node, "queue-range", temp, 2)) { |
| 1799 | dev_err(dev, "queue-range not specified\n"); |
| 1800 | ret = -ENODEV; |
| 1801 | goto err; |
| 1802 | } |
| 1803 | kdev->base_id = temp[0]; |
| 1804 | kdev->num_queues = temp[1]; |
| 1805 | |
| 1806 | /* Initialize queue managers using device tree configuration */ |
| 1807 | qmgrs = of_get_child_by_name(node, "qmgrs"); |
| 1808 | if (!qmgrs) { |
| 1809 | dev_err(dev, "queue manager info not specified\n"); |
| 1810 | ret = -ENODEV; |
| 1811 | goto err; |
| 1812 | } |
| 1813 | ret = knav_queue_init_qmgrs(kdev, qmgrs); |
| 1814 | of_node_put(qmgrs); |
| 1815 | if (ret) |
| 1816 | goto err; |
| 1817 | |
| 1818 | /* get pdsp configuration values from device tree */ |
| 1819 | pdsps = of_get_child_by_name(node, "pdsps"); |
| 1820 | if (pdsps) { |
| 1821 | ret = knav_queue_init_pdsps(kdev, pdsps); |
| 1822 | if (ret) |
| 1823 | goto err; |
| 1824 | |
| 1825 | ret = knav_queue_start_pdsps(kdev); |
| 1826 | if (ret) |
| 1827 | goto err; |
| 1828 | } |
| 1829 | of_node_put(pdsps); |
| 1830 | |
| 1831 | /* get usable queue range values from device tree */ |
| 1832 | queue_pools = of_get_child_by_name(node, "queue-pools"); |
| 1833 | if (!queue_pools) { |
| 1834 | dev_err(dev, "queue-pools not specified\n"); |
| 1835 | ret = -ENODEV; |
| 1836 | goto err; |
| 1837 | } |
| 1838 | ret = knav_setup_queue_pools(kdev, queue_pools); |
| 1839 | of_node_put(queue_pools); |
| 1840 | if (ret) |
| 1841 | goto err; |
| 1842 | |
| 1843 | ret = knav_get_link_ram(kdev, "linkram0", &kdev->link_rams[0]); |
| 1844 | if (ret) { |
| 1845 | dev_err(kdev->dev, "could not setup linking ram\n"); |
| 1846 | goto err; |
| 1847 | } |
| 1848 | |
| 1849 | ret = knav_get_link_ram(kdev, "linkram1", &kdev->link_rams[1]); |
| 1850 | if (ret) { |
| 1851 | /* |
| 1852 | * nothing really, we have one linking ram already, so we just |
| 1853 | * live within our means |
| 1854 | */ |
| 1855 | } |
| 1856 | |
| 1857 | ret = knav_queue_setup_link_ram(kdev); |
| 1858 | if (ret) |
| 1859 | goto err; |
| 1860 | |
| 1861 | regions = of_get_child_by_name(node, "descriptor-regions"); |
| 1862 | if (!regions) { |
| 1863 | dev_err(dev, "descriptor-regions not specified\n"); |
| 1864 | goto err; |
| 1865 | } |
| 1866 | ret = knav_queue_setup_regions(kdev, regions); |
| 1867 | of_node_put(regions); |
| 1868 | if (ret) |
| 1869 | goto err; |
| 1870 | |
| 1871 | ret = knav_queue_init_queues(kdev); |
| 1872 | if (ret < 0) { |
| 1873 | dev_err(dev, "hwqueue initialization failed\n"); |
| 1874 | goto err; |
| 1875 | } |
| 1876 | |
| 1877 | debugfs_create_file("qmss", S_IFREG | S_IRUGO, NULL, NULL, |
| 1878 | &knav_queue_debug_ops); |
Murali Karicheri | a2dd687 | 2018-04-17 17:30:31 -0400 | [diff] [blame] | 1879 | device_ready = true; |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1880 | return 0; |
| 1881 | |
| 1882 | err: |
| 1883 | knav_queue_stop_pdsps(kdev); |
| 1884 | knav_queue_free_regions(kdev); |
| 1885 | knav_free_queue_ranges(kdev); |
| 1886 | pm_runtime_put_sync(&pdev->dev); |
| 1887 | pm_runtime_disable(&pdev->dev); |
| 1888 | return ret; |
| 1889 | } |
| 1890 | |
| 1891 | static int knav_queue_remove(struct platform_device *pdev) |
| 1892 | { |
| 1893 | /* TODO: Free resources */ |
| 1894 | pm_runtime_put_sync(&pdev->dev); |
| 1895 | pm_runtime_disable(&pdev->dev); |
| 1896 | return 0; |
| 1897 | } |
| 1898 | |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1899 | static struct platform_driver keystone_qmss_driver = { |
| 1900 | .probe = knav_queue_probe, |
| 1901 | .remove = knav_queue_remove, |
| 1902 | .driver = { |
| 1903 | .name = "keystone-navigator-qmss", |
Sandeep Nair | 41f93af | 2014-02-28 10:47:50 -0500 | [diff] [blame] | 1904 | .of_match_table = keystone_qmss_of_match, |
| 1905 | }, |
| 1906 | }; |
| 1907 | module_platform_driver(keystone_qmss_driver); |
| 1908 | |
| 1909 | MODULE_LICENSE("GPL v2"); |
| 1910 | MODULE_DESCRIPTION("TI QMSS driver for Keystone SOCs"); |
| 1911 | MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com>"); |
| 1912 | MODULE_AUTHOR("Santosh Shilimkar <santosh.shilimkar@ti.com>"); |