Utkarsh Saxena | 4badc04 | 2017-03-03 15:38:45 +0530 | [diff] [blame] | 1 | /* Copyright (c) 2012-2017, The Linux Foundation. All rights reserved. |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/delay.h> |
| 14 | #include <linux/device.h> |
| 15 | #include <linux/dmapool.h> |
| 16 | #include <linux/list.h> |
| 17 | #include <linux/netdevice.h> |
| 18 | #include "ipa_i.h" |
| 19 | #include "ipa_trace.h" |
| 20 | |
Sunil Paidimarri | 226cf03 | 2016-10-14 13:33:08 -0700 | [diff] [blame^] | 21 | #define IPA_WAN_AGGR_PKT_CNT 5 |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 22 | #define IPA_LAST_DESC_CNT 0xFFFF |
| 23 | #define POLLING_INACTIVITY_RX 40 |
| 24 | #define POLLING_INACTIVITY_TX 40 |
| 25 | #define POLLING_MIN_SLEEP_TX 400 |
| 26 | #define POLLING_MAX_SLEEP_TX 500 |
| 27 | /* 8K less 1 nominal MTU (1500 bytes) rounded to units of KB */ |
| 28 | #define IPA_MTU 1500 |
| 29 | #define IPA_GENERIC_AGGR_BYTE_LIMIT 6 |
| 30 | #define IPA_GENERIC_AGGR_TIME_LIMIT 1 |
| 31 | #define IPA_GENERIC_AGGR_PKT_LIMIT 0 |
| 32 | |
| 33 | #define IPA_GENERIC_RX_BUFF_BASE_SZ 8192 |
| 34 | #define IPA_REAL_GENERIC_RX_BUFF_SZ(X) (SKB_DATA_ALIGN(\ |
| 35 | (X) + NET_SKB_PAD) +\ |
| 36 | SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) |
| 37 | #define IPA_GENERIC_RX_BUFF_SZ(X) ((X) -\ |
| 38 | (IPA_REAL_GENERIC_RX_BUFF_SZ(X) - (X))) |
| 39 | #define IPA_GENERIC_RX_BUFF_LIMIT (\ |
| 40 | IPA_REAL_GENERIC_RX_BUFF_SZ(\ |
| 41 | IPA_GENERIC_RX_BUFF_BASE_SZ) -\ |
| 42 | IPA_GENERIC_RX_BUFF_BASE_SZ) |
| 43 | |
| 44 | #define IPA_RX_BUFF_CLIENT_HEADROOM 256 |
| 45 | |
| 46 | /* less 1 nominal MTU (1500 bytes) rounded to units of KB */ |
| 47 | #define IPA_ADJUST_AGGR_BYTE_LIMIT(X) (((X) - IPA_MTU)/1000) |
| 48 | |
| 49 | #define IPA_WLAN_RX_POOL_SZ 100 |
| 50 | #define IPA_WLAN_RX_POOL_SZ_LOW_WM 5 |
| 51 | #define IPA_WLAN_RX_BUFF_SZ 2048 |
| 52 | #define IPA_WLAN_COMM_RX_POOL_LOW 100 |
| 53 | #define IPA_WLAN_COMM_RX_POOL_HIGH 900 |
| 54 | |
| 55 | #define IPA_ODU_RX_BUFF_SZ 2048 |
| 56 | #define IPA_ODU_RX_POOL_SZ 32 |
| 57 | #define IPA_SIZE_DL_CSUM_META_TRAILER 8 |
| 58 | |
| 59 | #define IPA_HEADROOM 128 |
| 60 | |
| 61 | static struct sk_buff *ipa_get_skb_ipa_rx(unsigned int len, gfp_t flags); |
| 62 | static void ipa_replenish_wlan_rx_cache(struct ipa_sys_context *sys); |
| 63 | static void ipa_replenish_rx_cache(struct ipa_sys_context *sys); |
| 64 | static void replenish_rx_work_func(struct work_struct *work); |
| 65 | static void ipa_wq_handle_rx(struct work_struct *work); |
| 66 | static void ipa_wq_handle_tx(struct work_struct *work); |
| 67 | static void ipa_wq_rx_common(struct ipa_sys_context *sys, u32 size); |
| 68 | static void ipa_wlan_wq_rx_common(struct ipa_sys_context *sys, |
| 69 | u32 size); |
| 70 | static int ipa_assign_policy(struct ipa_sys_connect_params *in, |
| 71 | struct ipa_sys_context *sys); |
| 72 | static void ipa_cleanup_rx(struct ipa_sys_context *sys); |
| 73 | static void ipa_wq_rx_avail(struct work_struct *work); |
| 74 | static void ipa_alloc_wlan_rx_common_cache(u32 size); |
| 75 | static void ipa_cleanup_wlan_rx_common_cache(void); |
| 76 | static void ipa_wq_repl_rx(struct work_struct *work); |
| 77 | static void ipa_dma_memcpy_notify(struct ipa_sys_context *sys, |
| 78 | struct sps_iovec *iovec); |
| 79 | |
| 80 | static u32 ipa_adjust_ra_buff_base_sz(u32 aggr_byte_limit); |
| 81 | static void ipa_fast_replenish_rx_cache(struct ipa_sys_context *sys); |
| 82 | |
| 83 | static void ipa_wq_write_done_common(struct ipa_sys_context *sys, u32 cnt) |
| 84 | { |
| 85 | struct ipa_tx_pkt_wrapper *tx_pkt_expected; |
| 86 | int i; |
| 87 | |
| 88 | for (i = 0; i < cnt; i++) { |
| 89 | spin_lock_bh(&sys->spinlock); |
| 90 | if (unlikely(list_empty(&sys->head_desc_list))) { |
| 91 | spin_unlock_bh(&sys->spinlock); |
| 92 | return; |
| 93 | } |
| 94 | tx_pkt_expected = list_first_entry(&sys->head_desc_list, |
| 95 | struct ipa_tx_pkt_wrapper, |
| 96 | link); |
| 97 | list_del(&tx_pkt_expected->link); |
| 98 | sys->len--; |
| 99 | spin_unlock_bh(&sys->spinlock); |
| 100 | if (!tx_pkt_expected->no_unmap_dma) { |
| 101 | if (tx_pkt_expected->type != IPA_DATA_DESC_SKB_PAGED) { |
| 102 | dma_unmap_single(ipa_ctx->pdev, |
| 103 | tx_pkt_expected->mem.phys_base, |
| 104 | tx_pkt_expected->mem.size, |
| 105 | DMA_TO_DEVICE); |
| 106 | } else { |
| 107 | dma_unmap_page(ipa_ctx->pdev, |
| 108 | tx_pkt_expected->mem.phys_base, |
| 109 | tx_pkt_expected->mem.size, |
| 110 | DMA_TO_DEVICE); |
| 111 | } |
| 112 | } |
| 113 | if (tx_pkt_expected->callback) |
| 114 | tx_pkt_expected->callback(tx_pkt_expected->user1, |
| 115 | tx_pkt_expected->user2); |
| 116 | if (tx_pkt_expected->cnt > 1 && |
| 117 | tx_pkt_expected->cnt != IPA_LAST_DESC_CNT) { |
| 118 | if (tx_pkt_expected->cnt == IPA_NUM_DESC_PER_SW_TX) { |
| 119 | dma_pool_free(ipa_ctx->dma_pool, |
| 120 | tx_pkt_expected->mult.base, |
| 121 | tx_pkt_expected->mult.phys_base); |
| 122 | } else { |
| 123 | dma_unmap_single(ipa_ctx->pdev, |
| 124 | tx_pkt_expected->mult.phys_base, |
| 125 | tx_pkt_expected->mult.size, |
| 126 | DMA_TO_DEVICE); |
| 127 | kfree(tx_pkt_expected->mult.base); |
| 128 | } |
| 129 | } |
| 130 | kmem_cache_free(ipa_ctx->tx_pkt_wrapper_cache, tx_pkt_expected); |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | static void ipa_wq_write_done_status(int src_pipe) |
| 135 | { |
| 136 | struct ipa_tx_pkt_wrapper *tx_pkt_expected; |
| 137 | struct ipa_sys_context *sys; |
| 138 | u32 cnt; |
| 139 | |
| 140 | WARN_ON(src_pipe >= ipa_ctx->ipa_num_pipes); |
| 141 | |
| 142 | if (!ipa_ctx->ep[src_pipe].status.status_en) |
| 143 | return; |
| 144 | |
| 145 | sys = ipa_ctx->ep[src_pipe].sys; |
| 146 | if (!sys) |
| 147 | return; |
| 148 | |
| 149 | spin_lock_bh(&sys->spinlock); |
| 150 | if (unlikely(list_empty(&sys->head_desc_list))) { |
| 151 | spin_unlock_bh(&sys->spinlock); |
| 152 | return; |
| 153 | } |
| 154 | tx_pkt_expected = list_first_entry(&sys->head_desc_list, |
| 155 | struct ipa_tx_pkt_wrapper, |
| 156 | link); |
| 157 | cnt = tx_pkt_expected->cnt; |
| 158 | spin_unlock_bh(&sys->spinlock); |
| 159 | ipa_wq_write_done_common(sys, cnt); |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * ipa_write_done() - this function will be (eventually) called when a Tx |
| 164 | * operation is complete |
| 165 | * * @work: work_struct used by the work queue |
| 166 | * |
| 167 | * Will be called in deferred context. |
| 168 | * - invoke the callback supplied by the client who sent this command |
| 169 | * - iterate over all packets and validate that |
| 170 | * the order for sent packet is the same as expected |
| 171 | * - delete all the tx packet descriptors from the system |
| 172 | * pipe context (not needed anymore) |
| 173 | * - return the tx buffer back to dma_pool |
| 174 | */ |
| 175 | static void ipa_wq_write_done(struct work_struct *work) |
| 176 | { |
| 177 | struct ipa_tx_pkt_wrapper *tx_pkt; |
| 178 | u32 cnt; |
| 179 | struct ipa_sys_context *sys; |
| 180 | |
| 181 | tx_pkt = container_of(work, struct ipa_tx_pkt_wrapper, work); |
| 182 | cnt = tx_pkt->cnt; |
| 183 | sys = tx_pkt->sys; |
| 184 | |
| 185 | ipa_wq_write_done_common(sys, cnt); |
| 186 | } |
| 187 | |
| 188 | static int ipa_handle_tx_core(struct ipa_sys_context *sys, bool process_all, |
| 189 | bool in_poll_state) |
| 190 | { |
| 191 | struct sps_iovec iov; |
| 192 | int ret; |
| 193 | int cnt = 0; |
| 194 | |
| 195 | while ((in_poll_state ? atomic_read(&sys->curr_polling_state) : |
| 196 | !atomic_read(&sys->curr_polling_state))) { |
| 197 | if (cnt && !process_all) |
| 198 | break; |
| 199 | ret = sps_get_iovec(sys->ep->ep_hdl, &iov); |
| 200 | if (ret) { |
| 201 | IPAERR("sps_get_iovec failed %d\n", ret); |
| 202 | break; |
| 203 | } |
| 204 | |
| 205 | if (iov.addr == 0) |
| 206 | break; |
| 207 | |
| 208 | ipa_wq_write_done_common(sys, 1); |
| 209 | cnt++; |
| 210 | }; |
| 211 | |
| 212 | return cnt; |
| 213 | } |
| 214 | |
| 215 | /** |
| 216 | * ipa_tx_switch_to_intr_mode() - Operate the Tx data path in interrupt mode |
| 217 | */ |
| 218 | static void ipa_tx_switch_to_intr_mode(struct ipa_sys_context *sys) |
| 219 | { |
| 220 | int ret; |
| 221 | |
| 222 | if (!atomic_read(&sys->curr_polling_state)) { |
| 223 | IPAERR("already in intr mode\n"); |
| 224 | goto fail; |
| 225 | } |
| 226 | |
| 227 | ret = sps_get_config(sys->ep->ep_hdl, &sys->ep->connect); |
| 228 | if (ret) { |
| 229 | IPAERR("sps_get_config() failed %d\n", ret); |
| 230 | goto fail; |
| 231 | } |
| 232 | sys->event.options = SPS_O_EOT; |
| 233 | ret = sps_register_event(sys->ep->ep_hdl, &sys->event); |
| 234 | if (ret) { |
| 235 | IPAERR("sps_register_event() failed %d\n", ret); |
| 236 | goto fail; |
| 237 | } |
| 238 | sys->ep->connect.options = |
| 239 | SPS_O_AUTO_ENABLE | SPS_O_ACK_TRANSFERS | SPS_O_EOT; |
| 240 | ret = sps_set_config(sys->ep->ep_hdl, &sys->ep->connect); |
| 241 | if (ret) { |
| 242 | IPAERR("sps_set_config() failed %d\n", ret); |
| 243 | goto fail; |
| 244 | } |
| 245 | atomic_set(&sys->curr_polling_state, 0); |
| 246 | ipa_handle_tx_core(sys, true, false); |
| 247 | return; |
| 248 | |
| 249 | fail: |
| 250 | queue_delayed_work(sys->wq, &sys->switch_to_intr_work, |
| 251 | msecs_to_jiffies(1)); |
| 252 | } |
| 253 | |
| 254 | static void ipa_handle_tx(struct ipa_sys_context *sys) |
| 255 | { |
| 256 | int inactive_cycles = 0; |
| 257 | int cnt; |
| 258 | |
| 259 | IPA_ACTIVE_CLIENTS_INC_SIMPLE(); |
| 260 | do { |
| 261 | cnt = ipa_handle_tx_core(sys, true, true); |
| 262 | if (cnt == 0) { |
| 263 | inactive_cycles++; |
| 264 | usleep_range(POLLING_MIN_SLEEP_TX, |
| 265 | POLLING_MAX_SLEEP_TX); |
| 266 | } else { |
| 267 | inactive_cycles = 0; |
| 268 | } |
| 269 | } while (inactive_cycles <= POLLING_INACTIVITY_TX); |
| 270 | |
| 271 | ipa_tx_switch_to_intr_mode(sys); |
| 272 | IPA_ACTIVE_CLIENTS_DEC_SIMPLE(); |
| 273 | } |
| 274 | |
| 275 | static void ipa_wq_handle_tx(struct work_struct *work) |
| 276 | { |
| 277 | struct ipa_sys_context *sys; |
| 278 | |
| 279 | sys = container_of(work, struct ipa_sys_context, work); |
| 280 | |
| 281 | ipa_handle_tx(sys); |
| 282 | } |
| 283 | |
| 284 | /** |
| 285 | * ipa_send_one() - Send a single descriptor |
| 286 | * @sys: system pipe context |
| 287 | * @desc: descriptor to send |
| 288 | * @in_atomic: whether caller is in atomic context |
| 289 | * |
| 290 | * - Allocate tx_packet wrapper |
| 291 | * - transfer data to the IPA |
| 292 | * - after the transfer was done the SPS will |
| 293 | * notify the sending user via ipa_sps_irq_comp_tx() |
| 294 | * |
| 295 | * Return codes: 0: success, -EFAULT: failure |
| 296 | */ |
| 297 | int ipa_send_one(struct ipa_sys_context *sys, struct ipa_desc *desc, |
| 298 | bool in_atomic) |
| 299 | { |
| 300 | struct ipa_tx_pkt_wrapper *tx_pkt; |
| 301 | int result; |
| 302 | u16 sps_flags = SPS_IOVEC_FLAG_EOT; |
| 303 | dma_addr_t dma_address; |
| 304 | u16 len; |
| 305 | u32 mem_flag = GFP_ATOMIC; |
| 306 | struct sps_iovec iov; |
| 307 | int ret; |
| 308 | |
| 309 | if (unlikely(!in_atomic)) |
| 310 | mem_flag = GFP_KERNEL; |
| 311 | |
| 312 | tx_pkt = kmem_cache_zalloc(ipa_ctx->tx_pkt_wrapper_cache, mem_flag); |
| 313 | if (!tx_pkt) { |
| 314 | IPAERR("failed to alloc tx wrapper\n"); |
| 315 | goto fail_mem_alloc; |
| 316 | } |
| 317 | |
| 318 | if (!desc->dma_address_valid) { |
| 319 | dma_address = dma_map_single(ipa_ctx->pdev, desc->pyld, |
| 320 | desc->len, DMA_TO_DEVICE); |
| 321 | } else { |
| 322 | dma_address = desc->dma_address; |
| 323 | tx_pkt->no_unmap_dma = true; |
| 324 | } |
| 325 | if (!dma_address) { |
| 326 | IPAERR("failed to DMA wrap\n"); |
| 327 | goto fail_dma_map; |
| 328 | } |
| 329 | |
| 330 | INIT_LIST_HEAD(&tx_pkt->link); |
| 331 | tx_pkt->type = desc->type; |
| 332 | tx_pkt->cnt = 1; /* only 1 desc in this "set" */ |
| 333 | |
| 334 | tx_pkt->mem.phys_base = dma_address; |
| 335 | tx_pkt->mem.base = desc->pyld; |
| 336 | tx_pkt->mem.size = desc->len; |
| 337 | tx_pkt->sys = sys; |
| 338 | tx_pkt->callback = desc->callback; |
| 339 | tx_pkt->user1 = desc->user1; |
| 340 | tx_pkt->user2 = desc->user2; |
| 341 | |
| 342 | /* |
| 343 | * Special treatment for immediate commands, where the structure of the |
| 344 | * descriptor is different |
| 345 | */ |
| 346 | if (desc->type == IPA_IMM_CMD_DESC) { |
| 347 | sps_flags |= SPS_IOVEC_FLAG_IMME; |
| 348 | len = desc->opcode; |
| 349 | IPADBG("sending cmd=%d pyld_len=%d sps_flags=%x\n", |
| 350 | desc->opcode, desc->len, sps_flags); |
| 351 | IPA_DUMP_BUFF(desc->pyld, dma_address, desc->len); |
| 352 | } else { |
| 353 | len = desc->len; |
| 354 | } |
| 355 | |
| 356 | INIT_WORK(&tx_pkt->work, ipa_wq_write_done); |
| 357 | |
| 358 | spin_lock_bh(&sys->spinlock); |
| 359 | list_add_tail(&tx_pkt->link, &sys->head_desc_list); |
| 360 | if (sys->policy == IPA_POLICY_NOINTR_MODE) { |
| 361 | do { |
| 362 | ret = sps_get_iovec(sys->ep->ep_hdl, &iov); |
| 363 | if (ret) { |
| 364 | IPADBG("sps_get_iovec failed %d\n", ret); |
| 365 | break; |
| 366 | } |
| 367 | if ((iov.addr == 0x0) && (iov.size == 0x0)) |
| 368 | break; |
| 369 | } while (1); |
| 370 | } |
| 371 | result = sps_transfer_one(sys->ep->ep_hdl, dma_address, len, tx_pkt, |
| 372 | sps_flags); |
| 373 | if (result) { |
| 374 | IPAERR("sps_transfer_one failed rc=%d\n", result); |
| 375 | goto fail_sps_send; |
| 376 | } |
| 377 | |
| 378 | spin_unlock_bh(&sys->spinlock); |
| 379 | |
| 380 | return 0; |
| 381 | |
| 382 | fail_sps_send: |
| 383 | list_del(&tx_pkt->link); |
| 384 | spin_unlock_bh(&sys->spinlock); |
| 385 | dma_unmap_single(ipa_ctx->pdev, dma_address, desc->len, DMA_TO_DEVICE); |
| 386 | fail_dma_map: |
| 387 | kmem_cache_free(ipa_ctx->tx_pkt_wrapper_cache, tx_pkt); |
| 388 | fail_mem_alloc: |
| 389 | return -EFAULT; |
| 390 | } |
| 391 | |
| 392 | /** |
| 393 | * ipa_send() - Send multiple descriptors in one HW transaction |
| 394 | * @sys: system pipe context |
| 395 | * @num_desc: number of packets |
| 396 | * @desc: packets to send (may be immediate command or data) |
| 397 | * @in_atomic: whether caller is in atomic context |
| 398 | * |
| 399 | * This function is used for system-to-bam connection. |
| 400 | * - SPS driver expect struct sps_transfer which will contain all the data |
| 401 | * for a transaction |
| 402 | * - ipa_tx_pkt_wrapper will be used for each ipa |
| 403 | * descriptor (allocated from wrappers cache) |
| 404 | * - The wrapper struct will be configured for each ipa-desc payload and will |
| 405 | * contain information which will be later used by the user callbacks |
| 406 | * - each transfer will be made by calling to sps_transfer() |
| 407 | * - Each packet (command or data) that will be sent will also be saved in |
| 408 | * ipa_sys_context for later check that all data was sent |
| 409 | * |
| 410 | * Return codes: 0: success, -EFAULT: failure |
| 411 | */ |
| 412 | int ipa_send(struct ipa_sys_context *sys, u32 num_desc, struct ipa_desc *desc, |
| 413 | bool in_atomic) |
| 414 | { |
| 415 | struct ipa_tx_pkt_wrapper *tx_pkt; |
| 416 | struct ipa_tx_pkt_wrapper *next_pkt; |
| 417 | struct sps_transfer transfer = { 0 }; |
| 418 | struct sps_iovec *iovec; |
| 419 | dma_addr_t dma_addr; |
| 420 | int i = 0; |
| 421 | int j; |
| 422 | int result; |
| 423 | int fail_dma_wrap = 0; |
| 424 | uint size = num_desc * sizeof(struct sps_iovec); |
| 425 | u32 mem_flag = GFP_ATOMIC; |
| 426 | struct sps_iovec iov; |
| 427 | int ret; |
| 428 | |
| 429 | if (unlikely(!in_atomic)) |
| 430 | mem_flag = GFP_KERNEL; |
| 431 | |
| 432 | if (num_desc == IPA_NUM_DESC_PER_SW_TX) { |
| 433 | transfer.iovec = dma_pool_alloc(ipa_ctx->dma_pool, mem_flag, |
| 434 | &dma_addr); |
| 435 | if (!transfer.iovec) { |
| 436 | IPAERR("fail to alloc dma mem for sps xfr buff\n"); |
| 437 | return -EFAULT; |
| 438 | } |
| 439 | } else { |
| 440 | transfer.iovec = kmalloc(size, mem_flag); |
| 441 | if (!transfer.iovec) { |
| 442 | IPAERR("fail to alloc mem for sps xfr buff "); |
| 443 | IPAERR("num_desc = %d size = %d\n", num_desc, size); |
| 444 | return -EFAULT; |
| 445 | } |
| 446 | dma_addr = dma_map_single(ipa_ctx->pdev, |
| 447 | transfer.iovec, size, DMA_TO_DEVICE); |
| 448 | if (!dma_addr) { |
| 449 | IPAERR("dma_map_single failed for sps xfr buff\n"); |
| 450 | kfree(transfer.iovec); |
| 451 | return -EFAULT; |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | transfer.iovec_phys = dma_addr; |
| 456 | transfer.iovec_count = num_desc; |
| 457 | spin_lock_bh(&sys->spinlock); |
| 458 | |
| 459 | for (i = 0; i < num_desc; i++) { |
| 460 | fail_dma_wrap = 0; |
| 461 | tx_pkt = kmem_cache_zalloc(ipa_ctx->tx_pkt_wrapper_cache, |
| 462 | mem_flag); |
| 463 | if (!tx_pkt) { |
| 464 | IPAERR("failed to alloc tx wrapper\n"); |
| 465 | goto failure; |
| 466 | } |
| 467 | /* |
| 468 | * first desc of set is "special" as it holds the count and |
| 469 | * other info |
| 470 | */ |
| 471 | if (i == 0) { |
| 472 | transfer.user = tx_pkt; |
| 473 | tx_pkt->mult.phys_base = dma_addr; |
| 474 | tx_pkt->mult.base = transfer.iovec; |
| 475 | tx_pkt->mult.size = size; |
| 476 | tx_pkt->cnt = num_desc; |
| 477 | INIT_WORK(&tx_pkt->work, ipa_wq_write_done); |
| 478 | } |
| 479 | |
| 480 | iovec = &transfer.iovec[i]; |
| 481 | iovec->flags = 0; |
| 482 | |
| 483 | INIT_LIST_HEAD(&tx_pkt->link); |
| 484 | tx_pkt->type = desc[i].type; |
| 485 | |
| 486 | if (desc[i].type != IPA_DATA_DESC_SKB_PAGED) { |
| 487 | tx_pkt->mem.base = desc[i].pyld; |
| 488 | tx_pkt->mem.size = desc[i].len; |
| 489 | |
| 490 | if (!desc[i].dma_address_valid) { |
| 491 | tx_pkt->mem.phys_base = |
| 492 | dma_map_single(ipa_ctx->pdev, |
| 493 | tx_pkt->mem.base, |
| 494 | tx_pkt->mem.size, |
| 495 | DMA_TO_DEVICE); |
| 496 | } else { |
| 497 | tx_pkt->mem.phys_base = desc[i].dma_address; |
| 498 | tx_pkt->no_unmap_dma = true; |
| 499 | } |
| 500 | } else { |
| 501 | tx_pkt->mem.base = desc[i].frag; |
| 502 | tx_pkt->mem.size = desc[i].len; |
| 503 | |
| 504 | if (!desc[i].dma_address_valid) { |
| 505 | tx_pkt->mem.phys_base = |
| 506 | skb_frag_dma_map(ipa_ctx->pdev, |
| 507 | desc[i].frag, |
| 508 | 0, tx_pkt->mem.size, |
| 509 | DMA_TO_DEVICE); |
| 510 | } else { |
| 511 | tx_pkt->mem.phys_base = desc[i].dma_address; |
| 512 | tx_pkt->no_unmap_dma = true; |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | if (!tx_pkt->mem.phys_base) { |
| 517 | IPAERR("failed to alloc tx wrapper\n"); |
| 518 | fail_dma_wrap = 1; |
| 519 | goto failure; |
| 520 | } |
| 521 | |
| 522 | tx_pkt->sys = sys; |
| 523 | tx_pkt->callback = desc[i].callback; |
| 524 | tx_pkt->user1 = desc[i].user1; |
| 525 | tx_pkt->user2 = desc[i].user2; |
| 526 | |
| 527 | /* |
| 528 | * Point the iovec to the buffer and |
| 529 | * add this packet to system pipe context. |
| 530 | */ |
| 531 | iovec->addr = tx_pkt->mem.phys_base; |
| 532 | list_add_tail(&tx_pkt->link, &sys->head_desc_list); |
| 533 | |
| 534 | /* |
| 535 | * Special treatment for immediate commands, where the structure |
| 536 | * of the descriptor is different |
| 537 | */ |
| 538 | if (desc[i].type == IPA_IMM_CMD_DESC) { |
| 539 | iovec->size = desc[i].opcode; |
| 540 | iovec->flags |= SPS_IOVEC_FLAG_IMME; |
| 541 | IPA_DUMP_BUFF(desc[i].pyld, |
| 542 | tx_pkt->mem.phys_base, desc[i].len); |
| 543 | } else { |
| 544 | iovec->size = desc[i].len; |
| 545 | } |
| 546 | |
| 547 | if (i == (num_desc - 1)) { |
| 548 | iovec->flags |= SPS_IOVEC_FLAG_EOT; |
| 549 | /* "mark" the last desc */ |
| 550 | tx_pkt->cnt = IPA_LAST_DESC_CNT; |
| 551 | } |
| 552 | } |
| 553 | |
| 554 | if (sys->policy == IPA_POLICY_NOINTR_MODE) { |
| 555 | do { |
| 556 | ret = sps_get_iovec(sys->ep->ep_hdl, &iov); |
| 557 | if (ret) { |
| 558 | IPADBG("sps_get_iovec failed %d\n", ret); |
| 559 | break; |
| 560 | } |
| 561 | if ((iov.addr == 0x0) && (iov.size == 0x0)) |
| 562 | break; |
| 563 | } while (1); |
| 564 | } |
| 565 | result = sps_transfer(sys->ep->ep_hdl, &transfer); |
| 566 | if (result) { |
| 567 | IPAERR("sps_transfer failed rc=%d\n", result); |
| 568 | goto failure; |
| 569 | } |
| 570 | |
| 571 | spin_unlock_bh(&sys->spinlock); |
| 572 | return 0; |
| 573 | |
| 574 | failure: |
| 575 | tx_pkt = transfer.user; |
| 576 | for (j = 0; j < i; j++) { |
| 577 | next_pkt = list_next_entry(tx_pkt, link); |
| 578 | list_del(&tx_pkt->link); |
| 579 | if (desc[j].type != IPA_DATA_DESC_SKB_PAGED) { |
| 580 | dma_unmap_single(ipa_ctx->pdev, tx_pkt->mem.phys_base, |
| 581 | tx_pkt->mem.size, |
| 582 | DMA_TO_DEVICE); |
| 583 | } else { |
| 584 | dma_unmap_page(ipa_ctx->pdev, tx_pkt->mem.phys_base, |
| 585 | tx_pkt->mem.size, |
| 586 | DMA_TO_DEVICE); |
| 587 | } |
| 588 | kmem_cache_free(ipa_ctx->tx_pkt_wrapper_cache, tx_pkt); |
| 589 | tx_pkt = next_pkt; |
| 590 | } |
| 591 | if (j < num_desc) |
| 592 | /* last desc failed */ |
| 593 | if (fail_dma_wrap) |
| 594 | kmem_cache_free(ipa_ctx->tx_pkt_wrapper_cache, tx_pkt); |
| 595 | if (transfer.iovec_phys) { |
| 596 | if (num_desc == IPA_NUM_DESC_PER_SW_TX) { |
| 597 | dma_pool_free(ipa_ctx->dma_pool, transfer.iovec, |
| 598 | transfer.iovec_phys); |
| 599 | } else { |
| 600 | dma_unmap_single(ipa_ctx->pdev, transfer.iovec_phys, |
| 601 | size, DMA_TO_DEVICE); |
| 602 | kfree(transfer.iovec); |
| 603 | } |
| 604 | } |
| 605 | spin_unlock_bh(&sys->spinlock); |
| 606 | return -EFAULT; |
| 607 | } |
| 608 | |
| 609 | /** |
| 610 | * ipa_sps_irq_cmd_ack - callback function which will be called by SPS driver |
| 611 | * after an immediate command is complete. |
| 612 | * @user1: pointer to the descriptor of the transfer |
| 613 | * @user2: |
| 614 | * |
| 615 | * Complete the immediate commands completion object, this will release the |
| 616 | * thread which waits on this completion object (ipa_send_cmd()) |
| 617 | */ |
| 618 | static void ipa_sps_irq_cmd_ack(void *user1, int user2) |
| 619 | { |
| 620 | struct ipa_desc *desc = (struct ipa_desc *)user1; |
| 621 | |
| 622 | if (!desc) { |
| 623 | IPAERR("desc is NULL\n"); |
| 624 | WARN_ON(1); |
| 625 | return; |
| 626 | } |
| 627 | IPADBG("got ack for cmd=%d\n", desc->opcode); |
| 628 | complete(&desc->xfer_done); |
| 629 | } |
| 630 | |
| 631 | /** |
| 632 | * ipa_send_cmd - send immediate commands |
| 633 | * @num_desc: number of descriptors within the desc struct |
| 634 | * @descr: descriptor structure |
| 635 | * |
| 636 | * Function will block till command gets ACK from IPA HW, caller needs |
| 637 | * to free any resources it allocated after function returns |
| 638 | * The callback in ipa_desc should not be set by the caller |
| 639 | * for this function. |
| 640 | */ |
| 641 | int ipa_send_cmd(u16 num_desc, struct ipa_desc *descr) |
| 642 | { |
| 643 | struct ipa_desc *desc; |
| 644 | int result = 0; |
| 645 | struct ipa_sys_context *sys; |
| 646 | int ep_idx; |
| 647 | |
| 648 | IPADBG("sending command\n"); |
| 649 | |
| 650 | ep_idx = ipa2_get_ep_mapping(IPA_CLIENT_APPS_CMD_PROD); |
| 651 | if (-1 == ep_idx) { |
| 652 | IPAERR("Client %u is not mapped\n", |
| 653 | IPA_CLIENT_APPS_CMD_PROD); |
| 654 | return -EFAULT; |
| 655 | } |
| 656 | sys = ipa_ctx->ep[ep_idx].sys; |
| 657 | |
| 658 | IPA_ACTIVE_CLIENTS_INC_SIMPLE(); |
| 659 | |
| 660 | if (num_desc == 1) { |
| 661 | init_completion(&descr->xfer_done); |
| 662 | |
| 663 | if (descr->callback || descr->user1) |
| 664 | WARN_ON(1); |
| 665 | |
| 666 | descr->callback = ipa_sps_irq_cmd_ack; |
| 667 | descr->user1 = descr; |
| 668 | if (ipa_send_one(sys, descr, true)) { |
| 669 | IPAERR("fail to send immediate command\n"); |
| 670 | result = -EFAULT; |
| 671 | goto bail; |
| 672 | } |
| 673 | wait_for_completion(&descr->xfer_done); |
| 674 | } else { |
| 675 | desc = &descr[num_desc - 1]; |
| 676 | init_completion(&desc->xfer_done); |
| 677 | |
| 678 | if (desc->callback || desc->user1) |
| 679 | WARN_ON(1); |
| 680 | |
| 681 | desc->callback = ipa_sps_irq_cmd_ack; |
| 682 | desc->user1 = desc; |
| 683 | if (ipa_send(sys, num_desc, descr, true)) { |
| 684 | IPAERR("fail to send multiple immediate command set\n"); |
| 685 | result = -EFAULT; |
| 686 | goto bail; |
| 687 | } |
| 688 | wait_for_completion(&desc->xfer_done); |
| 689 | } |
| 690 | |
| 691 | bail: |
| 692 | IPA_ACTIVE_CLIENTS_DEC_SIMPLE(); |
| 693 | return result; |
| 694 | } |
| 695 | |
| 696 | /** |
| 697 | * ipa_sps_irq_tx_notify() - Callback function which will be called by |
| 698 | * the SPS driver to start a Tx poll operation. |
| 699 | * Called in an interrupt context. |
| 700 | * @notify: SPS driver supplied notification struct |
| 701 | * |
| 702 | * This function defer the work for this event to the tx workqueue. |
| 703 | */ |
| 704 | static void ipa_sps_irq_tx_notify(struct sps_event_notify *notify) |
| 705 | { |
| 706 | struct ipa_sys_context *sys = (struct ipa_sys_context *)notify->user; |
| 707 | int ret; |
| 708 | |
| 709 | IPADBG("event %d notified\n", notify->event_id); |
| 710 | |
| 711 | switch (notify->event_id) { |
| 712 | case SPS_EVENT_EOT: |
| 713 | if (IPA_CLIENT_IS_APPS_CONS(sys->ep->client)) |
| 714 | atomic_set(&ipa_ctx->sps_pm.eot_activity, 1); |
| 715 | if (!atomic_read(&sys->curr_polling_state)) { |
| 716 | ret = sps_get_config(sys->ep->ep_hdl, |
| 717 | &sys->ep->connect); |
| 718 | if (ret) { |
| 719 | IPAERR("sps_get_config() failed %d\n", ret); |
| 720 | break; |
| 721 | } |
| 722 | sys->ep->connect.options = SPS_O_AUTO_ENABLE | |
| 723 | SPS_O_ACK_TRANSFERS | SPS_O_POLL; |
| 724 | ret = sps_set_config(sys->ep->ep_hdl, |
| 725 | &sys->ep->connect); |
| 726 | if (ret) { |
| 727 | IPAERR("sps_set_config() failed %d\n", ret); |
| 728 | break; |
| 729 | } |
| 730 | atomic_set(&sys->curr_polling_state, 1); |
| 731 | queue_work(sys->wq, &sys->work); |
| 732 | } |
| 733 | break; |
| 734 | default: |
| 735 | IPAERR("received unexpected event id %d\n", notify->event_id); |
| 736 | } |
| 737 | } |
| 738 | |
| 739 | /** |
| 740 | * ipa_sps_irq_tx_no_aggr_notify() - Callback function which will be called by |
| 741 | * the SPS driver after a Tx operation is complete. |
| 742 | * Called in an interrupt context. |
| 743 | * @notify: SPS driver supplied notification struct |
| 744 | * |
| 745 | * This function defer the work for this event to the tx workqueue. |
| 746 | * This event will be later handled by ipa_write_done. |
| 747 | */ |
| 748 | static void ipa_sps_irq_tx_no_aggr_notify(struct sps_event_notify *notify) |
| 749 | { |
| 750 | struct ipa_tx_pkt_wrapper *tx_pkt; |
| 751 | |
| 752 | IPADBG("event %d notified\n", notify->event_id); |
| 753 | |
| 754 | switch (notify->event_id) { |
| 755 | case SPS_EVENT_EOT: |
| 756 | tx_pkt = notify->data.transfer.user; |
| 757 | if (IPA_CLIENT_IS_APPS_CONS(tx_pkt->sys->ep->client)) |
| 758 | atomic_set(&ipa_ctx->sps_pm.eot_activity, 1); |
| 759 | queue_work(tx_pkt->sys->wq, &tx_pkt->work); |
| 760 | break; |
| 761 | default: |
| 762 | IPAERR("received unexpected event id %d\n", notify->event_id); |
| 763 | } |
| 764 | } |
| 765 | |
| 766 | /** |
| 767 | * ipa_poll_pkt() - Poll packet from SPS BAM |
| 768 | * return 0 to caller on poll successfully |
| 769 | * else -EIO |
| 770 | * |
| 771 | */ |
| 772 | static int ipa_poll_pkt(struct ipa_sys_context *sys, |
| 773 | struct sps_iovec *iov) |
| 774 | { |
| 775 | int ret; |
| 776 | |
| 777 | ret = sps_get_iovec(sys->ep->ep_hdl, iov); |
| 778 | if (ret) { |
| 779 | IPAERR("sps_get_iovec failed %d\n", ret); |
| 780 | return ret; |
| 781 | } |
| 782 | |
| 783 | if (iov->addr == 0) |
| 784 | return -EIO; |
| 785 | |
| 786 | return 0; |
| 787 | } |
| 788 | |
| 789 | /** |
| 790 | * ipa_handle_rx_core() - The core functionality of packet reception. This |
| 791 | * function is read from multiple code paths. |
| 792 | * |
| 793 | * All the packets on the Rx data path are received on the IPA_A5_LAN_WAN_IN |
| 794 | * endpoint. The function runs as long as there are packets in the pipe. |
| 795 | * For each packet: |
| 796 | * - Disconnect the packet from the system pipe linked list |
| 797 | * - Unmap the packets skb, make it non DMAable |
| 798 | * - Free the packet from the cache |
| 799 | * - Prepare a proper skb |
| 800 | * - Call the endpoints notify function, passing the skb in the parameters |
| 801 | * - Replenish the rx cache |
| 802 | */ |
| 803 | static int ipa_handle_rx_core(struct ipa_sys_context *sys, bool process_all, |
| 804 | bool in_poll_state) |
| 805 | { |
| 806 | struct sps_iovec iov; |
| 807 | int ret; |
| 808 | int cnt = 0; |
| 809 | |
| 810 | while ((in_poll_state ? atomic_read(&sys->curr_polling_state) : |
| 811 | !atomic_read(&sys->curr_polling_state))) { |
| 812 | if (cnt && !process_all) |
| 813 | break; |
| 814 | |
| 815 | ret = ipa_poll_pkt(sys, &iov); |
| 816 | if (ret) |
| 817 | break; |
| 818 | |
| 819 | if (IPA_CLIENT_IS_MEMCPY_DMA_CONS(sys->ep->client)) |
| 820 | ipa_dma_memcpy_notify(sys, &iov); |
| 821 | else if (IPA_CLIENT_IS_WLAN_CONS(sys->ep->client)) |
| 822 | ipa_wlan_wq_rx_common(sys, iov.size); |
| 823 | else |
| 824 | ipa_wq_rx_common(sys, iov.size); |
| 825 | |
| 826 | cnt++; |
| 827 | }; |
| 828 | |
| 829 | return cnt; |
| 830 | } |
| 831 | |
| 832 | /** |
| 833 | * ipa_rx_switch_to_intr_mode() - Operate the Rx data path in interrupt mode |
| 834 | */ |
| 835 | static void ipa_rx_switch_to_intr_mode(struct ipa_sys_context *sys) |
| 836 | { |
| 837 | int ret; |
| 838 | |
| 839 | if (!sys->ep || !sys->ep->valid) { |
| 840 | IPAERR("EP Not Valid, no need to cleanup.\n"); |
| 841 | return; |
| 842 | } |
| 843 | |
| 844 | ret = sps_get_config(sys->ep->ep_hdl, &sys->ep->connect); |
| 845 | if (ret) { |
| 846 | IPAERR("sps_get_config() failed %d\n", ret); |
| 847 | goto fail; |
| 848 | } |
| 849 | |
| 850 | if (!atomic_read(&sys->curr_polling_state) && |
| 851 | ((sys->ep->connect.options & SPS_O_EOT) == SPS_O_EOT)) { |
| 852 | IPADBG("already in intr mode\n"); |
| 853 | return; |
| 854 | } |
| 855 | |
| 856 | if (!atomic_read(&sys->curr_polling_state)) { |
| 857 | IPAERR("already in intr mode\n"); |
| 858 | goto fail; |
| 859 | } |
| 860 | |
| 861 | sys->event.options = SPS_O_EOT; |
| 862 | ret = sps_register_event(sys->ep->ep_hdl, &sys->event); |
| 863 | if (ret) { |
| 864 | IPAERR("sps_register_event() failed %d\n", ret); |
| 865 | goto fail; |
| 866 | } |
| 867 | sys->ep->connect.options = |
| 868 | SPS_O_AUTO_ENABLE | SPS_O_ACK_TRANSFERS | SPS_O_EOT; |
| 869 | ret = sps_set_config(sys->ep->ep_hdl, &sys->ep->connect); |
| 870 | if (ret) { |
| 871 | IPAERR("sps_set_config() failed %d\n", ret); |
| 872 | goto fail; |
| 873 | } |
| 874 | atomic_set(&sys->curr_polling_state, 0); |
| 875 | if (!sys->ep->napi_enabled) |
| 876 | ipa_handle_rx_core(sys, true, false); |
| 877 | ipa_dec_release_wakelock(sys->ep->wakelock_client); |
| 878 | return; |
| 879 | |
| 880 | fail: |
| 881 | queue_delayed_work(sys->wq, &sys->switch_to_intr_work, |
| 882 | msecs_to_jiffies(1)); |
| 883 | } |
| 884 | |
| 885 | |
| 886 | /** |
| 887 | * ipa_sps_irq_control() - Function to enable or disable BAM IRQ. |
| 888 | */ |
| 889 | static void ipa_sps_irq_control(struct ipa_sys_context *sys, bool enable) |
| 890 | { |
| 891 | int ret; |
| 892 | |
| 893 | /* |
| 894 | * Do not change sps config in case we are in polling mode as this |
| 895 | * indicates that sps driver already notified EOT event and sps config |
| 896 | * should not change until ipa driver processes the packet. |
| 897 | */ |
| 898 | if (atomic_read(&sys->curr_polling_state)) { |
| 899 | IPADBG("in polling mode, do not change config\n"); |
| 900 | return; |
| 901 | } |
| 902 | |
| 903 | if (enable) { |
| 904 | ret = sps_get_config(sys->ep->ep_hdl, &sys->ep->connect); |
| 905 | if (ret) { |
| 906 | IPAERR("sps_get_config() failed %d\n", ret); |
| 907 | return; |
| 908 | } |
| 909 | sys->event.options = SPS_O_EOT; |
| 910 | ret = sps_register_event(sys->ep->ep_hdl, &sys->event); |
| 911 | if (ret) { |
| 912 | IPAERR("sps_register_event() failed %d\n", ret); |
| 913 | return; |
| 914 | } |
| 915 | sys->ep->connect.options = |
| 916 | SPS_O_AUTO_ENABLE | SPS_O_ACK_TRANSFERS | SPS_O_EOT; |
| 917 | ret = sps_set_config(sys->ep->ep_hdl, &sys->ep->connect); |
| 918 | if (ret) { |
| 919 | IPAERR("sps_set_config() failed %d\n", ret); |
| 920 | return; |
| 921 | } |
| 922 | } else { |
| 923 | ret = sps_get_config(sys->ep->ep_hdl, |
| 924 | &sys->ep->connect); |
| 925 | if (ret) { |
| 926 | IPAERR("sps_get_config() failed %d\n", ret); |
| 927 | return; |
| 928 | } |
| 929 | sys->ep->connect.options = SPS_O_AUTO_ENABLE | |
| 930 | SPS_O_ACK_TRANSFERS | SPS_O_POLL; |
| 931 | ret = sps_set_config(sys->ep->ep_hdl, |
| 932 | &sys->ep->connect); |
| 933 | if (ret) { |
| 934 | IPAERR("sps_set_config() failed %d\n", ret); |
| 935 | return; |
| 936 | } |
| 937 | } |
| 938 | } |
| 939 | |
| 940 | void ipa_sps_irq_control_all(bool enable) |
| 941 | { |
| 942 | struct ipa_ep_context *ep; |
| 943 | int ipa_ep_idx, client_num; |
| 944 | |
| 945 | IPADBG("\n"); |
| 946 | |
| 947 | for (client_num = IPA_CLIENT_CONS; |
| 948 | client_num < IPA_CLIENT_MAX; client_num++) { |
| 949 | if (!IPA_CLIENT_IS_APPS_CONS(client_num)) |
| 950 | continue; |
| 951 | |
| 952 | ipa_ep_idx = ipa_get_ep_mapping(client_num); |
| 953 | if (ipa_ep_idx == -1) { |
| 954 | IPAERR("Invalid client.\n"); |
| 955 | continue; |
| 956 | } |
| 957 | ep = &ipa_ctx->ep[ipa_ep_idx]; |
| 958 | if (!ep->valid) { |
| 959 | IPAERR("EP (%d) not allocated.\n", ipa_ep_idx); |
| 960 | continue; |
| 961 | } |
| 962 | ipa_sps_irq_control(ep->sys, enable); |
| 963 | } |
| 964 | } |
| 965 | |
| 966 | /** |
| 967 | * ipa_rx_notify() - Callback function which is called by the SPS driver when a |
| 968 | * a packet is received |
| 969 | * @notify: SPS driver supplied notification information |
| 970 | * |
| 971 | * Called in an interrupt context, therefore the majority of the work is |
| 972 | * deffered using a work queue. |
| 973 | * |
| 974 | * After receiving a packet, the driver goes to polling mode and keeps pulling |
| 975 | * packets until the rx buffer is empty, then it goes back to interrupt mode. |
| 976 | * This comes to prevent the CPU from handling too many interrupts when the |
| 977 | * throughput is high. |
| 978 | */ |
| 979 | static void ipa_sps_irq_rx_notify(struct sps_event_notify *notify) |
| 980 | { |
| 981 | struct ipa_sys_context *sys = (struct ipa_sys_context *)notify->user; |
| 982 | int ret; |
| 983 | |
| 984 | IPADBG("event %d notified\n", notify->event_id); |
| 985 | |
| 986 | switch (notify->event_id) { |
| 987 | case SPS_EVENT_EOT: |
| 988 | if (IPA_CLIENT_IS_APPS_CONS(sys->ep->client)) |
| 989 | atomic_set(&ipa_ctx->sps_pm.eot_activity, 1); |
| 990 | |
| 991 | if (atomic_read(&sys->curr_polling_state)) { |
| 992 | sys->ep->eot_in_poll_err++; |
| 993 | break; |
| 994 | } |
| 995 | |
| 996 | ret = sps_get_config(sys->ep->ep_hdl, |
| 997 | &sys->ep->connect); |
| 998 | if (ret) { |
| 999 | IPAERR("sps_get_config() failed %d\n", ret); |
| 1000 | break; |
| 1001 | } |
| 1002 | sys->ep->connect.options = SPS_O_AUTO_ENABLE | |
| 1003 | SPS_O_ACK_TRANSFERS | SPS_O_POLL; |
| 1004 | ret = sps_set_config(sys->ep->ep_hdl, |
| 1005 | &sys->ep->connect); |
| 1006 | if (ret) { |
| 1007 | IPAERR("sps_set_config() failed %d\n", ret); |
| 1008 | break; |
| 1009 | } |
| 1010 | ipa_inc_acquire_wakelock(sys->ep->wakelock_client); |
| 1011 | atomic_set(&sys->curr_polling_state, 1); |
| 1012 | trace_intr_to_poll(sys->ep->client); |
| 1013 | queue_work(sys->wq, &sys->work); |
| 1014 | break; |
| 1015 | default: |
| 1016 | IPAERR("received unexpected event id %d\n", notify->event_id); |
| 1017 | } |
| 1018 | } |
| 1019 | |
| 1020 | static void switch_to_intr_tx_work_func(struct work_struct *work) |
| 1021 | { |
| 1022 | struct delayed_work *dwork; |
| 1023 | struct ipa_sys_context *sys; |
| 1024 | |
| 1025 | dwork = container_of(work, struct delayed_work, work); |
| 1026 | sys = container_of(dwork, struct ipa_sys_context, switch_to_intr_work); |
| 1027 | ipa_handle_tx(sys); |
| 1028 | } |
| 1029 | |
| 1030 | /** |
| 1031 | * ipa_handle_rx() - handle packet reception. This function is executed in the |
| 1032 | * context of a work queue. |
| 1033 | * @work: work struct needed by the work queue |
| 1034 | * |
| 1035 | * ipa_handle_rx_core() is run in polling mode. After all packets has been |
| 1036 | * received, the driver switches back to interrupt mode. |
| 1037 | */ |
| 1038 | static void ipa_handle_rx(struct ipa_sys_context *sys) |
| 1039 | { |
| 1040 | int inactive_cycles = 0; |
| 1041 | int cnt; |
| 1042 | |
| 1043 | IPA_ACTIVE_CLIENTS_INC_SIMPLE(); |
| 1044 | do { |
| 1045 | cnt = ipa_handle_rx_core(sys, true, true); |
| 1046 | if (cnt == 0) { |
| 1047 | inactive_cycles++; |
| 1048 | trace_idle_sleep_enter(sys->ep->client); |
| 1049 | usleep_range(ipa_ctx->ipa_rx_min_timeout_usec, |
| 1050 | ipa_ctx->ipa_rx_max_timeout_usec); |
| 1051 | trace_idle_sleep_exit(sys->ep->client); |
| 1052 | } else { |
| 1053 | inactive_cycles = 0; |
| 1054 | } |
| 1055 | |
| 1056 | /* if pipe is out of buffers there is no point polling for |
| 1057 | * completed descs; release the worker so delayed work can |
| 1058 | * run in a timely manner |
| 1059 | */ |
| 1060 | if (sys->len == 0) |
| 1061 | break; |
| 1062 | |
| 1063 | } while (inactive_cycles <= ipa_ctx->ipa_polling_iteration); |
| 1064 | |
| 1065 | trace_poll_to_intr(sys->ep->client); |
| 1066 | ipa_rx_switch_to_intr_mode(sys); |
| 1067 | IPA_ACTIVE_CLIENTS_DEC_SIMPLE(); |
| 1068 | } |
| 1069 | |
| 1070 | /** |
| 1071 | * ipa2_rx_poll() - Poll the rx packets from IPA HW. This |
| 1072 | * function is exectued in the softirq context |
| 1073 | * |
| 1074 | * if input budget is zero, the driver switches back to |
| 1075 | * interrupt mode |
| 1076 | * |
| 1077 | * return number of polled packets, on error 0(zero) |
| 1078 | */ |
| 1079 | int ipa2_rx_poll(u32 clnt_hdl, int weight) |
| 1080 | { |
| 1081 | struct ipa_ep_context *ep; |
| 1082 | int ret; |
| 1083 | int cnt = 0; |
| 1084 | unsigned int delay = 1; |
| 1085 | struct sps_iovec iov; |
| 1086 | |
| 1087 | IPADBG("\n"); |
| 1088 | if (clnt_hdl >= ipa_ctx->ipa_num_pipes || |
| 1089 | ipa_ctx->ep[clnt_hdl].valid == 0) { |
| 1090 | IPAERR("bad parm 0x%x\n", clnt_hdl); |
| 1091 | return cnt; |
| 1092 | } |
| 1093 | |
| 1094 | ep = &ipa_ctx->ep[clnt_hdl]; |
| 1095 | while (cnt < weight && |
| 1096 | atomic_read(&ep->sys->curr_polling_state)) { |
| 1097 | |
| 1098 | ret = ipa_poll_pkt(ep->sys, &iov); |
| 1099 | if (ret) |
| 1100 | break; |
| 1101 | |
| 1102 | ipa_wq_rx_common(ep->sys, iov.size); |
Sunil Paidimarri | 226cf03 | 2016-10-14 13:33:08 -0700 | [diff] [blame^] | 1103 | cnt += IPA_WAN_AGGR_PKT_CNT; |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 1104 | }; |
| 1105 | |
Sunil Paidimarri | 226cf03 | 2016-10-14 13:33:08 -0700 | [diff] [blame^] | 1106 | if (cnt == 0 || cnt < weight) { |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 1107 | ep->inactive_cycles++; |
| 1108 | ep->client_notify(ep->priv, IPA_CLIENT_COMP_NAPI, 0); |
| 1109 | |
| 1110 | if (ep->inactive_cycles > 3 || ep->sys->len == 0) { |
| 1111 | ep->switch_to_intr = true; |
| 1112 | delay = 0; |
Sunil Paidimarri | 226cf03 | 2016-10-14 13:33:08 -0700 | [diff] [blame^] | 1113 | } else if (cnt < weight) { |
| 1114 | delay = 0; |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 1115 | } |
| 1116 | queue_delayed_work(ep->sys->wq, |
| 1117 | &ep->sys->switch_to_intr_work, msecs_to_jiffies(delay)); |
| 1118 | } else |
| 1119 | ep->inactive_cycles = 0; |
| 1120 | |
| 1121 | return cnt; |
| 1122 | } |
| 1123 | |
| 1124 | static void switch_to_intr_rx_work_func(struct work_struct *work) |
| 1125 | { |
| 1126 | struct delayed_work *dwork; |
| 1127 | struct ipa_sys_context *sys; |
| 1128 | |
| 1129 | dwork = container_of(work, struct delayed_work, work); |
| 1130 | sys = container_of(dwork, struct ipa_sys_context, switch_to_intr_work); |
| 1131 | |
| 1132 | if (sys->ep->napi_enabled) { |
| 1133 | if (sys->ep->switch_to_intr) { |
| 1134 | ipa_rx_switch_to_intr_mode(sys); |
| 1135 | IPA_ACTIVE_CLIENTS_DEC_SPECIAL("NAPI"); |
| 1136 | sys->ep->switch_to_intr = false; |
| 1137 | sys->ep->inactive_cycles = 0; |
| 1138 | } else |
| 1139 | sys->ep->client_notify(sys->ep->priv, |
| 1140 | IPA_CLIENT_START_POLL, 0); |
| 1141 | } else |
| 1142 | ipa_handle_rx(sys); |
| 1143 | } |
| 1144 | |
| 1145 | /** |
| 1146 | * ipa_update_repl_threshold()- Update the repl_threshold for the client. |
| 1147 | * |
| 1148 | * Return value: None. |
| 1149 | */ |
| 1150 | void ipa_update_repl_threshold(enum ipa_client_type ipa_client) |
| 1151 | { |
| 1152 | int ep_idx; |
| 1153 | struct ipa_ep_context *ep; |
| 1154 | |
| 1155 | /* Check if ep is valid. */ |
| 1156 | ep_idx = ipa2_get_ep_mapping(ipa_client); |
| 1157 | if (ep_idx == -1) { |
| 1158 | IPADBG("Invalid IPA client\n"); |
| 1159 | return; |
| 1160 | } |
| 1161 | |
| 1162 | ep = &ipa_ctx->ep[ep_idx]; |
| 1163 | if (!ep->valid) { |
| 1164 | IPADBG("EP not valid/Not applicable for client.\n"); |
| 1165 | return; |
| 1166 | } |
| 1167 | /* |
| 1168 | * Determine how many buffers/descriptors remaining will |
| 1169 | * cause to drop below the yellow WM bar. |
| 1170 | */ |
Skylar Chang | 50b2169 | 2016-11-01 16:48:30 -0700 | [diff] [blame] | 1171 | if (ep->sys->rx_buff_sz) |
| 1172 | ep->rx_replenish_threshold = ipa_get_sys_yellow_wm(ep->sys) |
| 1173 | / ep->sys->rx_buff_sz; |
| 1174 | else |
| 1175 | ep->rx_replenish_threshold = 0; |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 1176 | } |
| 1177 | |
| 1178 | /** |
| 1179 | * ipa2_setup_sys_pipe() - Setup an IPA end-point in system-BAM mode and perform |
| 1180 | * IPA EP configuration |
| 1181 | * @sys_in: [in] input needed to setup BAM pipe and configure EP |
| 1182 | * @clnt_hdl: [out] client handle |
| 1183 | * |
| 1184 | * - configure the end-point registers with the supplied |
| 1185 | * parameters from the user. |
| 1186 | * - call SPS APIs to create a system-to-bam connection with IPA. |
| 1187 | * - allocate descriptor FIFO |
| 1188 | * - register callback function(ipa_sps_irq_rx_notify or |
| 1189 | * ipa_sps_irq_tx_notify - depends on client type) in case the driver is |
| 1190 | * not configured to pulling mode |
| 1191 | * |
| 1192 | * Returns: 0 on success, negative on failure |
| 1193 | */ |
| 1194 | int ipa2_setup_sys_pipe(struct ipa_sys_connect_params *sys_in, u32 *clnt_hdl) |
| 1195 | { |
| 1196 | struct ipa_ep_context *ep; |
| 1197 | int ipa_ep_idx; |
| 1198 | int result = -EINVAL; |
| 1199 | dma_addr_t dma_addr; |
| 1200 | char buff[IPA_RESOURCE_NAME_MAX]; |
| 1201 | struct iommu_domain *smmu_domain; |
| 1202 | |
| 1203 | if (unlikely(!ipa_ctx)) { |
| 1204 | IPAERR("IPA driver was not initialized\n"); |
| 1205 | return -EINVAL; |
| 1206 | } |
| 1207 | |
| 1208 | if (sys_in == NULL || clnt_hdl == NULL) { |
| 1209 | IPAERR("NULL args\n"); |
| 1210 | goto fail_gen; |
| 1211 | } |
| 1212 | |
| 1213 | if (sys_in->client >= IPA_CLIENT_MAX || sys_in->desc_fifo_sz == 0) { |
| 1214 | IPAERR("bad parm client:%d fifo_sz:%d\n", |
| 1215 | sys_in->client, sys_in->desc_fifo_sz); |
| 1216 | goto fail_gen; |
| 1217 | } |
| 1218 | |
| 1219 | ipa_ep_idx = ipa2_get_ep_mapping(sys_in->client); |
| 1220 | if (ipa_ep_idx == -1) { |
| 1221 | IPAERR("Invalid client.\n"); |
| 1222 | goto fail_gen; |
| 1223 | } |
| 1224 | |
| 1225 | ep = &ipa_ctx->ep[ipa_ep_idx]; |
| 1226 | |
| 1227 | IPA_ACTIVE_CLIENTS_INC_EP(sys_in->client); |
| 1228 | |
| 1229 | if (ep->valid == 1) { |
| 1230 | if (sys_in->client != IPA_CLIENT_APPS_LAN_WAN_PROD) { |
| 1231 | IPAERR("EP already allocated.\n"); |
| 1232 | goto fail_and_disable_clocks; |
| 1233 | } else { |
| 1234 | if (ipa2_cfg_ep_hdr(ipa_ep_idx, |
| 1235 | &sys_in->ipa_ep_cfg.hdr)) { |
| 1236 | IPAERR("fail to configure hdr prop of EP.\n"); |
| 1237 | result = -EFAULT; |
| 1238 | goto fail_and_disable_clocks; |
| 1239 | } |
| 1240 | if (ipa2_cfg_ep_cfg(ipa_ep_idx, |
| 1241 | &sys_in->ipa_ep_cfg.cfg)) { |
| 1242 | IPAERR("fail to configure cfg prop of EP.\n"); |
| 1243 | result = -EFAULT; |
| 1244 | goto fail_and_disable_clocks; |
| 1245 | } |
| 1246 | IPADBG("client %d (ep: %d) overlay ok sys=%p\n", |
| 1247 | sys_in->client, ipa_ep_idx, ep->sys); |
| 1248 | ep->client_notify = sys_in->notify; |
| 1249 | ep->priv = sys_in->priv; |
| 1250 | *clnt_hdl = ipa_ep_idx; |
| 1251 | if (!ep->keep_ipa_awake) |
| 1252 | IPA_ACTIVE_CLIENTS_DEC_EP(sys_in->client); |
| 1253 | |
| 1254 | return 0; |
| 1255 | } |
| 1256 | } |
| 1257 | |
| 1258 | memset(ep, 0, offsetof(struct ipa_ep_context, sys)); |
| 1259 | |
| 1260 | if (!ep->sys) { |
| 1261 | ep->sys = kzalloc(sizeof(struct ipa_sys_context), GFP_KERNEL); |
| 1262 | if (!ep->sys) { |
| 1263 | IPAERR("failed to sys ctx for client %d\n", |
| 1264 | sys_in->client); |
| 1265 | result = -ENOMEM; |
| 1266 | goto fail_and_disable_clocks; |
| 1267 | } |
| 1268 | |
| 1269 | ep->sys->ep = ep; |
| 1270 | snprintf(buff, IPA_RESOURCE_NAME_MAX, "ipawq%d", |
| 1271 | sys_in->client); |
| 1272 | ep->sys->wq = alloc_workqueue(buff, |
| 1273 | WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1); |
| 1274 | if (!ep->sys->wq) { |
| 1275 | IPAERR("failed to create wq for client %d\n", |
| 1276 | sys_in->client); |
| 1277 | result = -EFAULT; |
| 1278 | goto fail_wq; |
| 1279 | } |
| 1280 | |
| 1281 | snprintf(buff, IPA_RESOURCE_NAME_MAX, "iparepwq%d", |
| 1282 | sys_in->client); |
| 1283 | ep->sys->repl_wq = alloc_workqueue(buff, |
| 1284 | WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1); |
| 1285 | if (!ep->sys->repl_wq) { |
| 1286 | IPAERR("failed to create rep wq for client %d\n", |
| 1287 | sys_in->client); |
| 1288 | result = -EFAULT; |
| 1289 | goto fail_wq2; |
| 1290 | } |
| 1291 | |
| 1292 | INIT_LIST_HEAD(&ep->sys->head_desc_list); |
| 1293 | INIT_LIST_HEAD(&ep->sys->rcycl_list); |
| 1294 | spin_lock_init(&ep->sys->spinlock); |
| 1295 | } else { |
| 1296 | memset(ep->sys, 0, offsetof(struct ipa_sys_context, ep)); |
| 1297 | } |
| 1298 | |
| 1299 | ep->skip_ep_cfg = sys_in->skip_ep_cfg; |
| 1300 | if (ipa_assign_policy(sys_in, ep->sys)) { |
| 1301 | IPAERR("failed to sys ctx for client %d\n", sys_in->client); |
| 1302 | result = -ENOMEM; |
| 1303 | goto fail_gen2; |
| 1304 | } |
| 1305 | |
| 1306 | ep->valid = 1; |
| 1307 | ep->client = sys_in->client; |
| 1308 | ep->client_notify = sys_in->notify; |
| 1309 | ep->napi_enabled = sys_in->napi_enabled; |
| 1310 | ep->priv = sys_in->priv; |
| 1311 | ep->keep_ipa_awake = sys_in->keep_ipa_awake; |
| 1312 | atomic_set(&ep->avail_fifo_desc, |
| 1313 | ((sys_in->desc_fifo_sz/sizeof(struct sps_iovec))-1)); |
| 1314 | |
| 1315 | if (ep->status.status_en && IPA_CLIENT_IS_CONS(ep->client) && |
| 1316 | ep->sys->status_stat == NULL) { |
| 1317 | ep->sys->status_stat = |
| 1318 | kzalloc(sizeof(struct ipa_status_stats), GFP_KERNEL); |
| 1319 | if (!ep->sys->status_stat) { |
| 1320 | IPAERR("no memory\n"); |
| 1321 | goto fail_gen2; |
| 1322 | } |
| 1323 | } |
| 1324 | |
| 1325 | result = ipa_enable_data_path(ipa_ep_idx); |
| 1326 | if (result) { |
| 1327 | IPAERR("enable data path failed res=%d clnt=%d.\n", result, |
| 1328 | ipa_ep_idx); |
| 1329 | goto fail_gen2; |
| 1330 | } |
| 1331 | |
| 1332 | if (!ep->skip_ep_cfg) { |
| 1333 | if (ipa2_cfg_ep(ipa_ep_idx, &sys_in->ipa_ep_cfg)) { |
| 1334 | IPAERR("fail to configure EP.\n"); |
| 1335 | goto fail_gen2; |
| 1336 | } |
| 1337 | if (ipa2_cfg_ep_status(ipa_ep_idx, &ep->status)) { |
| 1338 | IPAERR("fail to configure status of EP.\n"); |
| 1339 | goto fail_gen2; |
| 1340 | } |
| 1341 | IPADBG("ep configuration successful\n"); |
| 1342 | } else { |
| 1343 | IPADBG("skipping ep configuration\n"); |
| 1344 | } |
| 1345 | |
| 1346 | /* Default Config */ |
| 1347 | ep->ep_hdl = sps_alloc_endpoint(); |
| 1348 | if (ep->ep_hdl == NULL) { |
| 1349 | IPAERR("SPS EP allocation failed.\n"); |
| 1350 | goto fail_gen2; |
| 1351 | } |
| 1352 | |
| 1353 | result = sps_get_config(ep->ep_hdl, &ep->connect); |
| 1354 | if (result) { |
| 1355 | IPAERR("fail to get config.\n"); |
| 1356 | goto fail_sps_cfg; |
| 1357 | } |
| 1358 | |
| 1359 | /* Specific Config */ |
| 1360 | if (IPA_CLIENT_IS_CONS(sys_in->client)) { |
| 1361 | ep->connect.mode = SPS_MODE_SRC; |
| 1362 | ep->connect.destination = SPS_DEV_HANDLE_MEM; |
| 1363 | ep->connect.source = ipa_ctx->bam_handle; |
| 1364 | ep->connect.dest_pipe_index = ipa_ctx->a5_pipe_index++; |
| 1365 | ep->connect.src_pipe_index = ipa_ep_idx; |
| 1366 | /* |
| 1367 | * Determine how many buffers/descriptors remaining will |
| 1368 | * cause to drop below the yellow WM bar. |
| 1369 | */ |
Skylar Chang | 50b2169 | 2016-11-01 16:48:30 -0700 | [diff] [blame] | 1370 | if (ep->sys->rx_buff_sz) |
| 1371 | ep->rx_replenish_threshold = |
| 1372 | ipa_get_sys_yellow_wm(ep->sys) / ep->sys->rx_buff_sz; |
| 1373 | else |
| 1374 | ep->rx_replenish_threshold = 0; |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 1375 | /* Only when the WAN pipes are setup, actual threshold will |
| 1376 | * be read from the register. So update LAN_CONS ep again with |
| 1377 | * right value. |
| 1378 | */ |
| 1379 | if (sys_in->client == IPA_CLIENT_APPS_WAN_CONS) |
| 1380 | ipa_update_repl_threshold(IPA_CLIENT_APPS_LAN_CONS); |
| 1381 | } else { |
| 1382 | ep->connect.mode = SPS_MODE_DEST; |
| 1383 | ep->connect.source = SPS_DEV_HANDLE_MEM; |
| 1384 | ep->connect.destination = ipa_ctx->bam_handle; |
| 1385 | ep->connect.src_pipe_index = ipa_ctx->a5_pipe_index++; |
| 1386 | ep->connect.dest_pipe_index = ipa_ep_idx; |
| 1387 | } |
| 1388 | |
| 1389 | IPADBG("client:%d ep:%d", |
| 1390 | sys_in->client, ipa_ep_idx); |
| 1391 | |
| 1392 | IPADBG("dest_pipe_index:%d src_pipe_index:%d\n", |
| 1393 | ep->connect.dest_pipe_index, |
| 1394 | ep->connect.src_pipe_index); |
| 1395 | |
| 1396 | ep->connect.options = ep->sys->sps_option; |
| 1397 | ep->connect.desc.size = sys_in->desc_fifo_sz; |
| 1398 | ep->connect.desc.base = dma_alloc_coherent(ipa_ctx->pdev, |
| 1399 | ep->connect.desc.size, &dma_addr, GFP_KERNEL); |
| 1400 | if (ipa_ctx->smmu_s1_bypass) { |
| 1401 | ep->connect.desc.phys_base = dma_addr; |
| 1402 | } else { |
| 1403 | ep->connect.desc.iova = dma_addr; |
| 1404 | smmu_domain = ipa2_get_smmu_domain(); |
| 1405 | if (smmu_domain != NULL) { |
| 1406 | ep->connect.desc.phys_base = |
| 1407 | iommu_iova_to_phys(smmu_domain, dma_addr); |
| 1408 | } |
| 1409 | } |
| 1410 | if (ep->connect.desc.base == NULL) { |
| 1411 | IPAERR("fail to get DMA desc memory.\n"); |
| 1412 | goto fail_sps_cfg; |
| 1413 | } |
| 1414 | |
| 1415 | ep->connect.event_thresh = IPA_EVENT_THRESHOLD; |
| 1416 | |
| 1417 | result = ipa_sps_connect_safe(ep->ep_hdl, &ep->connect, sys_in->client); |
| 1418 | if (result) { |
| 1419 | IPAERR("sps_connect fails.\n"); |
| 1420 | goto fail_sps_connect; |
| 1421 | } |
| 1422 | |
| 1423 | ep->sys->event.options = SPS_O_EOT; |
| 1424 | ep->sys->event.mode = SPS_TRIGGER_CALLBACK; |
| 1425 | ep->sys->event.xfer_done = NULL; |
| 1426 | ep->sys->event.user = ep->sys; |
| 1427 | ep->sys->event.callback = ep->sys->sps_callback; |
| 1428 | result = sps_register_event(ep->ep_hdl, &ep->sys->event); |
| 1429 | if (result < 0) { |
| 1430 | IPAERR("register event error %d\n", result); |
| 1431 | goto fail_register_event; |
| 1432 | } |
| 1433 | |
| 1434 | *clnt_hdl = ipa_ep_idx; |
| 1435 | |
| 1436 | if (ep->sys->repl_hdlr == ipa_fast_replenish_rx_cache) { |
| 1437 | ep->sys->repl.capacity = ep->sys->rx_pool_sz + 1; |
| 1438 | ep->sys->repl.cache = kzalloc(ep->sys->repl.capacity * |
| 1439 | sizeof(void *), GFP_KERNEL); |
| 1440 | if (!ep->sys->repl.cache) { |
| 1441 | IPAERR("ep=%d fail to alloc repl cache\n", ipa_ep_idx); |
| 1442 | ep->sys->repl_hdlr = ipa_replenish_rx_cache; |
| 1443 | ep->sys->repl.capacity = 0; |
| 1444 | } else { |
| 1445 | atomic_set(&ep->sys->repl.head_idx, 0); |
| 1446 | atomic_set(&ep->sys->repl.tail_idx, 0); |
| 1447 | ipa_wq_repl_rx(&ep->sys->repl_work); |
| 1448 | } |
| 1449 | } |
| 1450 | |
| 1451 | if (IPA_CLIENT_IS_CONS(sys_in->client)) |
| 1452 | ipa_replenish_rx_cache(ep->sys); |
| 1453 | |
| 1454 | if (IPA_CLIENT_IS_WLAN_CONS(sys_in->client)) { |
| 1455 | ipa_alloc_wlan_rx_common_cache(IPA_WLAN_COMM_RX_POOL_LOW); |
| 1456 | atomic_inc(&ipa_ctx->wc_memb.active_clnt_cnt); |
| 1457 | } |
| 1458 | |
| 1459 | ipa_ctx->skip_ep_cfg_shadow[ipa_ep_idx] = ep->skip_ep_cfg; |
| 1460 | if (!ep->skip_ep_cfg && IPA_CLIENT_IS_PROD(sys_in->client)) { |
| 1461 | if (ipa_ctx->modem_cfg_emb_pipe_flt && |
| 1462 | sys_in->client == IPA_CLIENT_APPS_LAN_WAN_PROD) |
| 1463 | IPADBG("modem cfg emb pipe flt\n"); |
| 1464 | else |
| 1465 | ipa_install_dflt_flt_rules(ipa_ep_idx); |
| 1466 | } |
| 1467 | |
| 1468 | if (!ep->keep_ipa_awake) |
| 1469 | IPA_ACTIVE_CLIENTS_DEC_EP(sys_in->client); |
| 1470 | |
| 1471 | IPADBG("client %d (ep: %d) connected sys=%p\n", sys_in->client, |
| 1472 | ipa_ep_idx, ep->sys); |
| 1473 | |
| 1474 | return 0; |
| 1475 | |
| 1476 | fail_register_event: |
| 1477 | sps_disconnect(ep->ep_hdl); |
| 1478 | fail_sps_connect: |
| 1479 | dma_free_coherent(ipa_ctx->pdev, ep->connect.desc.size, |
| 1480 | ep->connect.desc.base, |
| 1481 | ep->connect.desc.phys_base); |
| 1482 | fail_sps_cfg: |
| 1483 | sps_free_endpoint(ep->ep_hdl); |
| 1484 | fail_gen2: |
| 1485 | destroy_workqueue(ep->sys->repl_wq); |
| 1486 | fail_wq2: |
| 1487 | destroy_workqueue(ep->sys->wq); |
| 1488 | fail_wq: |
| 1489 | kfree(ep->sys); |
| 1490 | memset(&ipa_ctx->ep[ipa_ep_idx], 0, sizeof(struct ipa_ep_context)); |
| 1491 | fail_and_disable_clocks: |
| 1492 | IPA_ACTIVE_CLIENTS_DEC_EP(sys_in->client); |
| 1493 | fail_gen: |
| 1494 | return result; |
| 1495 | } |
| 1496 | |
| 1497 | /** |
| 1498 | * ipa2_teardown_sys_pipe() - Teardown the system-BAM pipe and cleanup IPA EP |
| 1499 | * @clnt_hdl: [in] the handle obtained from ipa2_setup_sys_pipe |
| 1500 | * |
| 1501 | * Returns: 0 on success, negative on failure |
| 1502 | */ |
| 1503 | int ipa2_teardown_sys_pipe(u32 clnt_hdl) |
| 1504 | { |
| 1505 | struct ipa_ep_context *ep; |
| 1506 | int empty; |
| 1507 | |
| 1508 | if (unlikely(!ipa_ctx)) { |
| 1509 | IPAERR("IPA driver was not initialized\n"); |
| 1510 | return -EINVAL; |
| 1511 | } |
| 1512 | |
| 1513 | if (clnt_hdl >= ipa_ctx->ipa_num_pipes || |
| 1514 | ipa_ctx->ep[clnt_hdl].valid == 0) { |
| 1515 | IPAERR("bad parm.\n"); |
| 1516 | return -EINVAL; |
| 1517 | } |
| 1518 | |
| 1519 | ep = &ipa_ctx->ep[clnt_hdl]; |
| 1520 | |
| 1521 | if (!ep->keep_ipa_awake) |
| 1522 | IPA_ACTIVE_CLIENTS_INC_EP(ipa2_get_client_mapping(clnt_hdl)); |
| 1523 | |
| 1524 | ipa_disable_data_path(clnt_hdl); |
| 1525 | if (ep->napi_enabled) { |
| 1526 | ep->switch_to_intr = true; |
| 1527 | do { |
| 1528 | usleep_range(95, 105); |
| 1529 | } while (atomic_read(&ep->sys->curr_polling_state)); |
| 1530 | } |
| 1531 | |
| 1532 | if (IPA_CLIENT_IS_PROD(ep->client)) { |
| 1533 | do { |
| 1534 | spin_lock_bh(&ep->sys->spinlock); |
| 1535 | empty = list_empty(&ep->sys->head_desc_list); |
| 1536 | spin_unlock_bh(&ep->sys->spinlock); |
| 1537 | if (!empty) |
| 1538 | usleep_range(95, 105); |
| 1539 | else |
| 1540 | break; |
| 1541 | } while (1); |
| 1542 | } |
| 1543 | |
| 1544 | if (IPA_CLIENT_IS_CONS(ep->client)) { |
| 1545 | cancel_delayed_work_sync(&ep->sys->replenish_rx_work); |
| 1546 | cancel_delayed_work_sync(&ep->sys->switch_to_intr_work); |
| 1547 | } |
| 1548 | |
| 1549 | flush_workqueue(ep->sys->wq); |
| 1550 | sps_disconnect(ep->ep_hdl); |
| 1551 | dma_free_coherent(ipa_ctx->pdev, ep->connect.desc.size, |
| 1552 | ep->connect.desc.base, |
| 1553 | ep->connect.desc.phys_base); |
| 1554 | sps_free_endpoint(ep->ep_hdl); |
| 1555 | if (ep->sys->repl_wq) |
| 1556 | flush_workqueue(ep->sys->repl_wq); |
| 1557 | if (IPA_CLIENT_IS_CONS(ep->client)) |
| 1558 | ipa_cleanup_rx(ep->sys); |
| 1559 | |
| 1560 | if (!ep->skip_ep_cfg && IPA_CLIENT_IS_PROD(ep->client)) { |
| 1561 | if (ipa_ctx->modem_cfg_emb_pipe_flt && |
| 1562 | ep->client == IPA_CLIENT_APPS_LAN_WAN_PROD) |
| 1563 | IPADBG("modem cfg emb pipe flt\n"); |
| 1564 | else |
| 1565 | ipa_delete_dflt_flt_rules(clnt_hdl); |
| 1566 | } |
| 1567 | |
| 1568 | if (IPA_CLIENT_IS_WLAN_CONS(ep->client)) |
| 1569 | atomic_dec(&ipa_ctx->wc_memb.active_clnt_cnt); |
| 1570 | |
| 1571 | memset(&ep->wstats, 0, sizeof(struct ipa_wlan_stats)); |
| 1572 | |
| 1573 | if (!atomic_read(&ipa_ctx->wc_memb.active_clnt_cnt)) |
| 1574 | ipa_cleanup_wlan_rx_common_cache(); |
| 1575 | |
| 1576 | ep->valid = 0; |
| 1577 | IPA_ACTIVE_CLIENTS_DEC_EP(ipa2_get_client_mapping(clnt_hdl)); |
| 1578 | |
| 1579 | IPADBG("client (ep: %d) disconnected\n", clnt_hdl); |
| 1580 | |
| 1581 | return 0; |
| 1582 | } |
| 1583 | |
| 1584 | /** |
| 1585 | * ipa_tx_comp_usr_notify_release() - Callback function which will call the |
| 1586 | * user supplied callback function to release the skb, or release it on |
| 1587 | * its own if no callback function was supplied. |
| 1588 | * @user1 |
| 1589 | * @user2 |
| 1590 | * |
| 1591 | * This notified callback is for the destination client. |
| 1592 | * This function is supplied in ipa_connect. |
| 1593 | */ |
| 1594 | static void ipa_tx_comp_usr_notify_release(void *user1, int user2) |
| 1595 | { |
| 1596 | struct sk_buff *skb = (struct sk_buff *)user1; |
| 1597 | int ep_idx = user2; |
| 1598 | |
| 1599 | IPADBG("skb=%p ep=%d\n", skb, ep_idx); |
| 1600 | |
| 1601 | IPA_STATS_INC_CNT(ipa_ctx->stats.tx_pkts_compl); |
| 1602 | |
| 1603 | if (ipa_ctx->ep[ep_idx].client_notify) |
| 1604 | ipa_ctx->ep[ep_idx].client_notify(ipa_ctx->ep[ep_idx].priv, |
| 1605 | IPA_WRITE_DONE, (unsigned long)skb); |
| 1606 | else |
| 1607 | dev_kfree_skb_any(skb); |
| 1608 | } |
| 1609 | |
| 1610 | static void ipa_tx_cmd_comp(void *user1, int user2) |
| 1611 | { |
| 1612 | kfree(user1); |
| 1613 | } |
| 1614 | |
| 1615 | /** |
| 1616 | * ipa2_tx_dp() - Data-path tx handler |
| 1617 | * @dst: [in] which IPA destination to route tx packets to |
| 1618 | * @skb: [in] the packet to send |
| 1619 | * @metadata: [in] TX packet meta-data |
| 1620 | * |
| 1621 | * Data-path tx handler, this is used for both SW data-path which by-passes most |
| 1622 | * IPA HW blocks AND the regular HW data-path for WLAN AMPDU traffic only. If |
| 1623 | * dst is a "valid" CONS type, then SW data-path is used. If dst is the |
| 1624 | * WLAN_AMPDU PROD type, then HW data-path for WLAN AMPDU is used. Anything else |
| 1625 | * is an error. For errors, client needs to free the skb as needed. For success, |
| 1626 | * IPA driver will later invoke client callback if one was supplied. That |
| 1627 | * callback should free the skb. If no callback supplied, IPA driver will free |
| 1628 | * the skb internally |
| 1629 | * |
| 1630 | * The function will use two descriptors for this send command |
| 1631 | * (for A5_WLAN_AMPDU_PROD only one desciprtor will be sent), |
| 1632 | * the first descriptor will be used to inform the IPA hardware that |
| 1633 | * apps need to push data into the IPA (IP_PACKET_INIT immediate command). |
| 1634 | * Once this send was done from SPS point-of-view the IPA driver will |
| 1635 | * get notified by the supplied callback - ipa_sps_irq_tx_comp() |
| 1636 | * |
| 1637 | * ipa_sps_irq_tx_comp will call to the user supplied |
| 1638 | * callback (from ipa_connect) |
| 1639 | * |
| 1640 | * Returns: 0 on success, negative on failure |
| 1641 | */ |
| 1642 | int ipa2_tx_dp(enum ipa_client_type dst, struct sk_buff *skb, |
| 1643 | struct ipa_tx_meta *meta) |
| 1644 | { |
| 1645 | struct ipa_desc *desc; |
| 1646 | struct ipa_desc _desc[2]; |
| 1647 | int dst_ep_idx; |
| 1648 | struct ipa_ip_packet_init *cmd; |
| 1649 | struct ipa_sys_context *sys; |
| 1650 | int src_ep_idx; |
| 1651 | int num_frags, f; |
| 1652 | |
| 1653 | if (unlikely(!ipa_ctx)) { |
| 1654 | IPAERR("IPA driver was not initialized\n"); |
| 1655 | return -EINVAL; |
| 1656 | } |
| 1657 | |
| 1658 | if (skb->len == 0) { |
| 1659 | IPAERR("packet size is 0\n"); |
| 1660 | return -EINVAL; |
| 1661 | } |
| 1662 | |
| 1663 | num_frags = skb_shinfo(skb)->nr_frags; |
| 1664 | if (num_frags) { |
| 1665 | /* 1 desc is needed for the linear portion of skb; |
| 1666 | * 1 desc may be needed for the PACKET_INIT; |
| 1667 | * 1 desc for each frag |
| 1668 | */ |
| 1669 | desc = kzalloc(sizeof(*desc) * (num_frags + 2), GFP_ATOMIC); |
| 1670 | if (!desc) { |
| 1671 | IPAERR("failed to alloc desc array\n"); |
| 1672 | goto fail_mem; |
| 1673 | } |
| 1674 | } else { |
| 1675 | memset(_desc, 0, 2 * sizeof(struct ipa_desc)); |
| 1676 | desc = &_desc[0]; |
| 1677 | } |
| 1678 | |
| 1679 | /* |
| 1680 | * USB_CONS: PKT_INIT ep_idx = dst pipe |
| 1681 | * Q6_CONS: PKT_INIT ep_idx = sender pipe |
| 1682 | * A5_LAN_WAN_PROD: HW path ep_idx = sender pipe |
| 1683 | * |
| 1684 | * LAN TX: all PKT_INIT |
| 1685 | * WAN TX: PKT_INIT (cmd) + HW (data) |
| 1686 | * |
| 1687 | */ |
| 1688 | if (IPA_CLIENT_IS_CONS(dst)) { |
| 1689 | src_ep_idx = ipa2_get_ep_mapping(IPA_CLIENT_APPS_LAN_WAN_PROD); |
| 1690 | if (-1 == src_ep_idx) { |
| 1691 | IPAERR("Client %u is not mapped\n", |
| 1692 | IPA_CLIENT_APPS_LAN_WAN_PROD); |
| 1693 | goto fail_gen; |
| 1694 | } |
| 1695 | dst_ep_idx = ipa2_get_ep_mapping(dst); |
| 1696 | } else { |
| 1697 | src_ep_idx = ipa2_get_ep_mapping(dst); |
| 1698 | if (-1 == src_ep_idx) { |
| 1699 | IPAERR("Client %u is not mapped\n", dst); |
| 1700 | goto fail_gen; |
| 1701 | } |
| 1702 | if (meta && meta->pkt_init_dst_ep_valid) |
| 1703 | dst_ep_idx = meta->pkt_init_dst_ep; |
| 1704 | else |
| 1705 | dst_ep_idx = -1; |
| 1706 | } |
| 1707 | |
| 1708 | sys = ipa_ctx->ep[src_ep_idx].sys; |
| 1709 | |
| 1710 | if (!sys->ep->valid) { |
| 1711 | IPAERR("pipe not valid\n"); |
| 1712 | goto fail_gen; |
| 1713 | } |
| 1714 | |
| 1715 | if (dst_ep_idx != -1) { |
| 1716 | /* SW data path */ |
| 1717 | cmd = kzalloc(sizeof(struct ipa_ip_packet_init), GFP_ATOMIC); |
| 1718 | if (!cmd) { |
| 1719 | IPAERR("failed to alloc immediate command object\n"); |
| 1720 | goto fail_gen; |
| 1721 | } |
| 1722 | |
| 1723 | cmd->destination_pipe_index = dst_ep_idx; |
| 1724 | desc[0].opcode = IPA_IP_PACKET_INIT; |
| 1725 | desc[0].pyld = cmd; |
| 1726 | desc[0].len = sizeof(struct ipa_ip_packet_init); |
| 1727 | desc[0].type = IPA_IMM_CMD_DESC; |
| 1728 | desc[0].callback = ipa_tx_cmd_comp; |
| 1729 | desc[0].user1 = cmd; |
| 1730 | desc[1].pyld = skb->data; |
| 1731 | desc[1].len = skb_headlen(skb); |
| 1732 | desc[1].type = IPA_DATA_DESC_SKB; |
| 1733 | desc[1].callback = ipa_tx_comp_usr_notify_release; |
| 1734 | desc[1].user1 = skb; |
| 1735 | desc[1].user2 = (meta && meta->pkt_init_dst_ep_valid && |
| 1736 | meta->pkt_init_dst_ep_remote) ? |
| 1737 | src_ep_idx : |
| 1738 | dst_ep_idx; |
| 1739 | if (meta && meta->dma_address_valid) { |
| 1740 | desc[1].dma_address_valid = true; |
| 1741 | desc[1].dma_address = meta->dma_address; |
| 1742 | } |
| 1743 | |
| 1744 | for (f = 0; f < num_frags; f++) { |
| 1745 | desc[2+f].frag = &skb_shinfo(skb)->frags[f]; |
| 1746 | desc[2+f].type = IPA_DATA_DESC_SKB_PAGED; |
| 1747 | desc[2+f].len = skb_frag_size(desc[2+f].frag); |
| 1748 | } |
| 1749 | |
| 1750 | /* don't free skb till frag mappings are released */ |
| 1751 | if (num_frags) { |
| 1752 | desc[2+f-1].callback = desc[1].callback; |
| 1753 | desc[2+f-1].user1 = desc[1].user1; |
| 1754 | desc[2+f-1].user2 = desc[1].user2; |
| 1755 | desc[1].callback = NULL; |
| 1756 | } |
| 1757 | |
| 1758 | if (ipa_send(sys, num_frags + 2, desc, true)) { |
| 1759 | IPAERR("fail to send skb %p num_frags %u SWP\n", |
| 1760 | skb, num_frags); |
| 1761 | goto fail_send; |
| 1762 | } |
| 1763 | IPA_STATS_INC_CNT(ipa_ctx->stats.tx_sw_pkts); |
| 1764 | } else { |
| 1765 | /* HW data path */ |
| 1766 | desc[0].pyld = skb->data; |
| 1767 | desc[0].len = skb_headlen(skb); |
| 1768 | desc[0].type = IPA_DATA_DESC_SKB; |
| 1769 | desc[0].callback = ipa_tx_comp_usr_notify_release; |
| 1770 | desc[0].user1 = skb; |
| 1771 | desc[0].user2 = src_ep_idx; |
| 1772 | |
| 1773 | if (meta && meta->dma_address_valid) { |
| 1774 | desc[0].dma_address_valid = true; |
| 1775 | desc[0].dma_address = meta->dma_address; |
| 1776 | } |
| 1777 | |
| 1778 | if (num_frags == 0) { |
| 1779 | if (ipa_send_one(sys, desc, true)) { |
| 1780 | IPAERR("fail to send skb %p HWP\n", skb); |
| 1781 | goto fail_gen; |
| 1782 | } |
| 1783 | } else { |
| 1784 | for (f = 0; f < num_frags; f++) { |
| 1785 | desc[1+f].frag = &skb_shinfo(skb)->frags[f]; |
| 1786 | desc[1+f].type = IPA_DATA_DESC_SKB_PAGED; |
| 1787 | desc[1+f].len = skb_frag_size(desc[1+f].frag); |
| 1788 | } |
| 1789 | |
| 1790 | /* don't free skb till frag mappings are released */ |
| 1791 | desc[1+f-1].callback = desc[0].callback; |
| 1792 | desc[1+f-1].user1 = desc[0].user1; |
| 1793 | desc[1+f-1].user2 = desc[0].user2; |
| 1794 | desc[0].callback = NULL; |
| 1795 | |
| 1796 | if (ipa_send(sys, num_frags + 1, desc, true)) { |
| 1797 | IPAERR("fail to send skb %p num_frags %u HWP\n", |
| 1798 | skb, num_frags); |
| 1799 | goto fail_gen; |
| 1800 | } |
| 1801 | } |
| 1802 | |
| 1803 | IPA_STATS_INC_CNT(ipa_ctx->stats.tx_hw_pkts); |
| 1804 | } |
| 1805 | |
| 1806 | if (num_frags) { |
| 1807 | kfree(desc); |
| 1808 | IPA_STATS_INC_CNT(ipa_ctx->stats.tx_non_linear); |
| 1809 | } |
| 1810 | |
| 1811 | return 0; |
| 1812 | |
| 1813 | fail_send: |
| 1814 | kfree(cmd); |
| 1815 | fail_gen: |
| 1816 | if (num_frags) |
| 1817 | kfree(desc); |
| 1818 | fail_mem: |
| 1819 | return -EFAULT; |
| 1820 | } |
| 1821 | |
| 1822 | static void ipa_wq_handle_rx(struct work_struct *work) |
| 1823 | { |
| 1824 | struct ipa_sys_context *sys; |
| 1825 | |
| 1826 | sys = container_of(work, struct ipa_sys_context, work); |
| 1827 | |
| 1828 | if (sys->ep->napi_enabled) { |
| 1829 | IPA_ACTIVE_CLIENTS_INC_SPECIAL("NAPI"); |
| 1830 | sys->ep->client_notify(sys->ep->priv, |
| 1831 | IPA_CLIENT_START_POLL, 0); |
| 1832 | } else |
| 1833 | ipa_handle_rx(sys); |
| 1834 | } |
| 1835 | |
| 1836 | static void ipa_wq_repl_rx(struct work_struct *work) |
| 1837 | { |
| 1838 | struct ipa_sys_context *sys; |
| 1839 | void *ptr; |
| 1840 | struct ipa_rx_pkt_wrapper *rx_pkt; |
| 1841 | gfp_t flag = GFP_KERNEL | (ipa_ctx->use_dma_zone ? GFP_DMA : 0); |
| 1842 | u32 next; |
| 1843 | u32 curr; |
| 1844 | |
| 1845 | sys = container_of(work, struct ipa_sys_context, repl_work); |
| 1846 | curr = atomic_read(&sys->repl.tail_idx); |
| 1847 | |
| 1848 | begin: |
| 1849 | while (1) { |
| 1850 | next = (curr + 1) % sys->repl.capacity; |
| 1851 | if (next == atomic_read(&sys->repl.head_idx)) |
| 1852 | goto fail_kmem_cache_alloc; |
| 1853 | |
| 1854 | rx_pkt = kmem_cache_zalloc(ipa_ctx->rx_pkt_wrapper_cache, |
| 1855 | flag); |
| 1856 | if (!rx_pkt) { |
| 1857 | pr_err_ratelimited("%s fail alloc rx wrapper sys=%p\n", |
| 1858 | __func__, sys); |
| 1859 | goto fail_kmem_cache_alloc; |
| 1860 | } |
| 1861 | |
| 1862 | INIT_LIST_HEAD(&rx_pkt->link); |
| 1863 | INIT_WORK(&rx_pkt->work, ipa_wq_rx_avail); |
| 1864 | rx_pkt->sys = sys; |
| 1865 | |
| 1866 | rx_pkt->data.skb = sys->get_skb(sys->rx_buff_sz, flag); |
| 1867 | if (rx_pkt->data.skb == NULL) { |
| 1868 | pr_err_ratelimited("%s fail alloc skb sys=%p\n", |
| 1869 | __func__, sys); |
| 1870 | goto fail_skb_alloc; |
| 1871 | } |
| 1872 | ptr = skb_put(rx_pkt->data.skb, sys->rx_buff_sz); |
| 1873 | rx_pkt->data.dma_addr = dma_map_single(ipa_ctx->pdev, ptr, |
| 1874 | sys->rx_buff_sz, |
| 1875 | DMA_FROM_DEVICE); |
| 1876 | if (rx_pkt->data.dma_addr == 0 || |
| 1877 | rx_pkt->data.dma_addr == ~0) { |
| 1878 | pr_err_ratelimited("%s dma map fail %p for %p sys=%p\n", |
| 1879 | __func__, (void *)rx_pkt->data.dma_addr, |
| 1880 | ptr, sys); |
| 1881 | goto fail_dma_mapping; |
| 1882 | } |
| 1883 | |
| 1884 | sys->repl.cache[curr] = rx_pkt; |
| 1885 | curr = next; |
| 1886 | /* ensure write is done before setting tail index */ |
| 1887 | mb(); |
| 1888 | atomic_set(&sys->repl.tail_idx, next); |
| 1889 | } |
| 1890 | |
| 1891 | return; |
| 1892 | |
| 1893 | fail_dma_mapping: |
| 1894 | sys->free_skb(rx_pkt->data.skb); |
| 1895 | fail_skb_alloc: |
| 1896 | kmem_cache_free(ipa_ctx->rx_pkt_wrapper_cache, rx_pkt); |
| 1897 | fail_kmem_cache_alloc: |
| 1898 | if (atomic_read(&sys->repl.tail_idx) == |
| 1899 | atomic_read(&sys->repl.head_idx)) { |
| 1900 | if (sys->ep->client == IPA_CLIENT_APPS_WAN_CONS) |
| 1901 | IPA_STATS_INC_CNT(ipa_ctx->stats.wan_repl_rx_empty); |
| 1902 | else if (sys->ep->client == IPA_CLIENT_APPS_LAN_CONS) |
| 1903 | IPA_STATS_INC_CNT(ipa_ctx->stats.lan_repl_rx_empty); |
| 1904 | else |
| 1905 | WARN_ON(1); |
| 1906 | pr_err_ratelimited("%s sys=%p repl ring empty\n", |
| 1907 | __func__, sys); |
| 1908 | goto begin; |
| 1909 | } |
| 1910 | } |
| 1911 | |
| 1912 | static void ipa_replenish_wlan_rx_cache(struct ipa_sys_context *sys) |
| 1913 | { |
| 1914 | struct ipa_rx_pkt_wrapper *rx_pkt = NULL; |
| 1915 | struct ipa_rx_pkt_wrapper *tmp; |
| 1916 | int ret; |
| 1917 | u32 rx_len_cached = 0; |
| 1918 | |
| 1919 | IPADBG("\n"); |
| 1920 | |
| 1921 | spin_lock_bh(&ipa_ctx->wc_memb.wlan_spinlock); |
| 1922 | rx_len_cached = sys->len; |
| 1923 | |
| 1924 | if (rx_len_cached < sys->rx_pool_sz) { |
| 1925 | list_for_each_entry_safe(rx_pkt, tmp, |
| 1926 | &ipa_ctx->wc_memb.wlan_comm_desc_list, link) { |
| 1927 | list_del(&rx_pkt->link); |
| 1928 | |
| 1929 | if (ipa_ctx->wc_memb.wlan_comm_free_cnt > 0) |
| 1930 | ipa_ctx->wc_memb.wlan_comm_free_cnt--; |
| 1931 | |
| 1932 | INIT_LIST_HEAD(&rx_pkt->link); |
| 1933 | rx_pkt->len = 0; |
| 1934 | rx_pkt->sys = sys; |
| 1935 | |
| 1936 | ret = sps_transfer_one(sys->ep->ep_hdl, |
| 1937 | rx_pkt->data.dma_addr, |
| 1938 | IPA_WLAN_RX_BUFF_SZ, rx_pkt, 0); |
| 1939 | |
| 1940 | if (ret) { |
| 1941 | IPAERR("sps_transfer_one failed %d\n", ret); |
| 1942 | goto fail_sps_transfer; |
| 1943 | } |
| 1944 | |
| 1945 | list_add_tail(&rx_pkt->link, &sys->head_desc_list); |
| 1946 | rx_len_cached = ++sys->len; |
| 1947 | |
| 1948 | if (rx_len_cached >= sys->rx_pool_sz) { |
| 1949 | spin_unlock_bh(&ipa_ctx->wc_memb.wlan_spinlock); |
| 1950 | return; |
| 1951 | } |
| 1952 | } |
| 1953 | } |
| 1954 | spin_unlock_bh(&ipa_ctx->wc_memb.wlan_spinlock); |
| 1955 | |
| 1956 | if (rx_len_cached < sys->rx_pool_sz && |
| 1957 | ipa_ctx->wc_memb.wlan_comm_total_cnt < |
| 1958 | IPA_WLAN_COMM_RX_POOL_HIGH) { |
| 1959 | ipa_replenish_rx_cache(sys); |
| 1960 | ipa_ctx->wc_memb.wlan_comm_total_cnt += |
| 1961 | (sys->rx_pool_sz - rx_len_cached); |
| 1962 | } |
| 1963 | |
| 1964 | return; |
| 1965 | |
| 1966 | fail_sps_transfer: |
| 1967 | list_del(&rx_pkt->link); |
| 1968 | spin_unlock_bh(&ipa_ctx->wc_memb.wlan_spinlock); |
| 1969 | } |
| 1970 | |
| 1971 | static void ipa_cleanup_wlan_rx_common_cache(void) |
| 1972 | { |
| 1973 | struct ipa_rx_pkt_wrapper *rx_pkt; |
| 1974 | struct ipa_rx_pkt_wrapper *tmp; |
| 1975 | |
Utkarsh Saxena | 69f307d | 2017-03-13 14:58:40 +0530 | [diff] [blame] | 1976 | spin_lock_bh(&ipa_ctx->wc_memb.wlan_spinlock); |
| 1977 | |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 1978 | list_for_each_entry_safe(rx_pkt, tmp, |
| 1979 | &ipa_ctx->wc_memb.wlan_comm_desc_list, link) { |
| 1980 | list_del(&rx_pkt->link); |
| 1981 | dma_unmap_single(ipa_ctx->pdev, rx_pkt->data.dma_addr, |
| 1982 | IPA_WLAN_COMM_RX_POOL_LOW, DMA_FROM_DEVICE); |
| 1983 | dev_kfree_skb_any(rx_pkt->data.skb); |
| 1984 | kmem_cache_free(ipa_ctx->rx_pkt_wrapper_cache, rx_pkt); |
| 1985 | ipa_ctx->wc_memb.wlan_comm_free_cnt--; |
| 1986 | ipa_ctx->wc_memb.wlan_comm_total_cnt--; |
| 1987 | } |
| 1988 | ipa_ctx->wc_memb.total_tx_pkts_freed = 0; |
| 1989 | |
| 1990 | if (ipa_ctx->wc_memb.wlan_comm_free_cnt != 0) |
| 1991 | IPAERR("wlan comm buff free cnt: %d\n", |
| 1992 | ipa_ctx->wc_memb.wlan_comm_free_cnt); |
| 1993 | |
| 1994 | if (ipa_ctx->wc_memb.wlan_comm_total_cnt != 0) |
| 1995 | IPAERR("wlan comm buff total cnt: %d\n", |
| 1996 | ipa_ctx->wc_memb.wlan_comm_total_cnt); |
| 1997 | |
Utkarsh Saxena | 69f307d | 2017-03-13 14:58:40 +0530 | [diff] [blame] | 1998 | spin_unlock_bh(&ipa_ctx->wc_memb.wlan_spinlock); |
| 1999 | |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 2000 | } |
| 2001 | |
| 2002 | static void ipa_alloc_wlan_rx_common_cache(u32 size) |
| 2003 | { |
| 2004 | void *ptr; |
| 2005 | struct ipa_rx_pkt_wrapper *rx_pkt; |
| 2006 | int rx_len_cached = 0; |
| 2007 | gfp_t flag = GFP_NOWAIT | __GFP_NOWARN | |
| 2008 | (ipa_ctx->use_dma_zone ? GFP_DMA : 0); |
| 2009 | |
| 2010 | rx_len_cached = ipa_ctx->wc_memb.wlan_comm_total_cnt; |
| 2011 | while (rx_len_cached < size) { |
| 2012 | rx_pkt = kmem_cache_zalloc(ipa_ctx->rx_pkt_wrapper_cache, |
| 2013 | flag); |
| 2014 | if (!rx_pkt) { |
| 2015 | IPAERR("failed to alloc rx wrapper\n"); |
| 2016 | goto fail_kmem_cache_alloc; |
| 2017 | } |
| 2018 | |
| 2019 | INIT_LIST_HEAD(&rx_pkt->link); |
| 2020 | INIT_WORK(&rx_pkt->work, ipa_wq_rx_avail); |
| 2021 | |
| 2022 | rx_pkt->data.skb = |
| 2023 | ipa_get_skb_ipa_rx(IPA_WLAN_RX_BUFF_SZ, |
| 2024 | flag); |
| 2025 | if (rx_pkt->data.skb == NULL) { |
| 2026 | IPAERR("failed to alloc skb\n"); |
| 2027 | goto fail_skb_alloc; |
| 2028 | } |
| 2029 | ptr = skb_put(rx_pkt->data.skb, IPA_WLAN_RX_BUFF_SZ); |
| 2030 | rx_pkt->data.dma_addr = dma_map_single(ipa_ctx->pdev, ptr, |
| 2031 | IPA_WLAN_RX_BUFF_SZ, DMA_FROM_DEVICE); |
| 2032 | if (rx_pkt->data.dma_addr == 0 || |
| 2033 | rx_pkt->data.dma_addr == ~0) { |
| 2034 | IPAERR("dma_map_single failure %p for %p\n", |
| 2035 | (void *)rx_pkt->data.dma_addr, ptr); |
| 2036 | goto fail_dma_mapping; |
| 2037 | } |
| 2038 | |
| 2039 | list_add_tail(&rx_pkt->link, |
| 2040 | &ipa_ctx->wc_memb.wlan_comm_desc_list); |
| 2041 | rx_len_cached = ++ipa_ctx->wc_memb.wlan_comm_total_cnt; |
| 2042 | |
| 2043 | ipa_ctx->wc_memb.wlan_comm_free_cnt++; |
| 2044 | |
| 2045 | } |
| 2046 | |
| 2047 | return; |
| 2048 | |
| 2049 | fail_dma_mapping: |
| 2050 | dev_kfree_skb_any(rx_pkt->data.skb); |
| 2051 | fail_skb_alloc: |
| 2052 | kmem_cache_free(ipa_ctx->rx_pkt_wrapper_cache, rx_pkt); |
| 2053 | fail_kmem_cache_alloc: |
| 2054 | return; |
| 2055 | } |
| 2056 | |
| 2057 | |
| 2058 | /** |
| 2059 | * ipa_replenish_rx_cache() - Replenish the Rx packets cache. |
| 2060 | * |
| 2061 | * The function allocates buffers in the rx_pkt_wrapper_cache cache until there |
| 2062 | * are IPA_RX_POOL_CEIL buffers in the cache. |
| 2063 | * - Allocate a buffer in the cache |
| 2064 | * - Initialized the packets link |
| 2065 | * - Initialize the packets work struct |
| 2066 | * - Allocate the packets socket buffer (skb) |
| 2067 | * - Fill the packets skb with data |
| 2068 | * - Make the packet DMAable |
| 2069 | * - Add the packet to the system pipe linked list |
| 2070 | * - Initiate a SPS transfer so that SPS driver will use this packet later. |
| 2071 | */ |
| 2072 | static void ipa_replenish_rx_cache(struct ipa_sys_context *sys) |
| 2073 | { |
| 2074 | void *ptr; |
| 2075 | struct ipa_rx_pkt_wrapper *rx_pkt; |
| 2076 | int ret; |
| 2077 | int rx_len_cached = 0; |
| 2078 | gfp_t flag = GFP_NOWAIT | __GFP_NOWARN | |
| 2079 | (ipa_ctx->use_dma_zone ? GFP_DMA : 0); |
| 2080 | |
| 2081 | rx_len_cached = sys->len; |
| 2082 | |
| 2083 | while (rx_len_cached < sys->rx_pool_sz) { |
| 2084 | rx_pkt = kmem_cache_zalloc(ipa_ctx->rx_pkt_wrapper_cache, |
| 2085 | flag); |
| 2086 | if (!rx_pkt) { |
| 2087 | IPAERR("failed to alloc rx wrapper\n"); |
| 2088 | goto fail_kmem_cache_alloc; |
| 2089 | } |
| 2090 | |
| 2091 | INIT_LIST_HEAD(&rx_pkt->link); |
| 2092 | INIT_WORK(&rx_pkt->work, ipa_wq_rx_avail); |
| 2093 | rx_pkt->sys = sys; |
| 2094 | |
| 2095 | rx_pkt->data.skb = sys->get_skb(sys->rx_buff_sz, flag); |
| 2096 | if (rx_pkt->data.skb == NULL) { |
| 2097 | IPAERR("failed to alloc skb\n"); |
| 2098 | goto fail_skb_alloc; |
| 2099 | } |
| 2100 | ptr = skb_put(rx_pkt->data.skb, sys->rx_buff_sz); |
| 2101 | rx_pkt->data.dma_addr = dma_map_single(ipa_ctx->pdev, ptr, |
| 2102 | sys->rx_buff_sz, |
| 2103 | DMA_FROM_DEVICE); |
| 2104 | if (rx_pkt->data.dma_addr == 0 || |
| 2105 | rx_pkt->data.dma_addr == ~0) { |
| 2106 | IPAERR("dma_map_single failure %p for %p\n", |
| 2107 | (void *)rx_pkt->data.dma_addr, ptr); |
| 2108 | goto fail_dma_mapping; |
| 2109 | } |
| 2110 | |
| 2111 | list_add_tail(&rx_pkt->link, &sys->head_desc_list); |
| 2112 | rx_len_cached = ++sys->len; |
| 2113 | |
| 2114 | ret = sps_transfer_one(sys->ep->ep_hdl, |
| 2115 | rx_pkt->data.dma_addr, sys->rx_buff_sz, rx_pkt, 0); |
| 2116 | |
| 2117 | if (ret) { |
| 2118 | IPAERR("sps_transfer_one failed %d\n", ret); |
| 2119 | goto fail_sps_transfer; |
| 2120 | } |
| 2121 | } |
| 2122 | |
| 2123 | return; |
| 2124 | |
| 2125 | fail_sps_transfer: |
| 2126 | list_del(&rx_pkt->link); |
| 2127 | rx_len_cached = --sys->len; |
| 2128 | dma_unmap_single(ipa_ctx->pdev, rx_pkt->data.dma_addr, |
| 2129 | sys->rx_buff_sz, DMA_FROM_DEVICE); |
| 2130 | fail_dma_mapping: |
| 2131 | sys->free_skb(rx_pkt->data.skb); |
| 2132 | fail_skb_alloc: |
| 2133 | kmem_cache_free(ipa_ctx->rx_pkt_wrapper_cache, rx_pkt); |
| 2134 | fail_kmem_cache_alloc: |
| 2135 | if (rx_len_cached == 0) |
| 2136 | queue_delayed_work(sys->wq, &sys->replenish_rx_work, |
| 2137 | msecs_to_jiffies(1)); |
| 2138 | } |
| 2139 | |
| 2140 | static void ipa_replenish_rx_cache_recycle(struct ipa_sys_context *sys) |
| 2141 | { |
| 2142 | void *ptr; |
| 2143 | struct ipa_rx_pkt_wrapper *rx_pkt; |
| 2144 | int ret; |
| 2145 | int rx_len_cached = 0; |
| 2146 | |
| 2147 | rx_len_cached = sys->len; |
| 2148 | |
| 2149 | while (rx_len_cached < sys->rx_pool_sz) { |
| 2150 | spin_lock_bh(&sys->spinlock); |
| 2151 | if (list_empty(&sys->rcycl_list)) |
| 2152 | goto fail_kmem_cache_alloc; |
| 2153 | |
| 2154 | rx_pkt = list_first_entry(&sys->rcycl_list, |
| 2155 | struct ipa_rx_pkt_wrapper, link); |
| 2156 | list_del(&rx_pkt->link); |
| 2157 | spin_unlock_bh(&sys->spinlock); |
| 2158 | INIT_LIST_HEAD(&rx_pkt->link); |
| 2159 | ptr = skb_put(rx_pkt->data.skb, sys->rx_buff_sz); |
| 2160 | rx_pkt->data.dma_addr = dma_map_single(ipa_ctx->pdev, |
| 2161 | ptr, sys->rx_buff_sz, DMA_FROM_DEVICE); |
| 2162 | if (rx_pkt->data.dma_addr == 0 || |
| 2163 | rx_pkt->data.dma_addr == ~0) |
| 2164 | goto fail_dma_mapping; |
| 2165 | |
| 2166 | list_add_tail(&rx_pkt->link, &sys->head_desc_list); |
| 2167 | rx_len_cached = ++sys->len; |
| 2168 | |
| 2169 | ret = sps_transfer_one(sys->ep->ep_hdl, |
| 2170 | rx_pkt->data.dma_addr, sys->rx_buff_sz, rx_pkt, 0); |
| 2171 | |
| 2172 | if (ret) { |
| 2173 | IPAERR("sps_transfer_one failed %d\n", ret); |
| 2174 | goto fail_sps_transfer; |
| 2175 | } |
| 2176 | } |
| 2177 | |
| 2178 | return; |
| 2179 | fail_sps_transfer: |
| 2180 | rx_len_cached = --sys->len; |
| 2181 | list_del(&rx_pkt->link); |
| 2182 | INIT_LIST_HEAD(&rx_pkt->link); |
| 2183 | dma_unmap_single(ipa_ctx->pdev, rx_pkt->data.dma_addr, |
| 2184 | sys->rx_buff_sz, DMA_FROM_DEVICE); |
| 2185 | fail_dma_mapping: |
| 2186 | spin_lock_bh(&sys->spinlock); |
| 2187 | list_add_tail(&rx_pkt->link, &sys->rcycl_list); |
| 2188 | INIT_LIST_HEAD(&rx_pkt->link); |
| 2189 | spin_unlock_bh(&sys->spinlock); |
| 2190 | fail_kmem_cache_alloc: |
| 2191 | spin_unlock_bh(&sys->spinlock); |
| 2192 | if (rx_len_cached == 0) |
| 2193 | queue_delayed_work(sys->wq, &sys->replenish_rx_work, |
| 2194 | msecs_to_jiffies(1)); |
| 2195 | } |
| 2196 | |
| 2197 | static void ipa_fast_replenish_rx_cache(struct ipa_sys_context *sys) |
| 2198 | { |
| 2199 | struct ipa_rx_pkt_wrapper *rx_pkt; |
| 2200 | int ret; |
| 2201 | int rx_len_cached = 0; |
| 2202 | u32 curr; |
| 2203 | |
| 2204 | rx_len_cached = sys->len; |
| 2205 | curr = atomic_read(&sys->repl.head_idx); |
| 2206 | |
| 2207 | while (rx_len_cached < sys->rx_pool_sz) { |
| 2208 | if (curr == atomic_read(&sys->repl.tail_idx)) { |
| 2209 | queue_work(sys->repl_wq, &sys->repl_work); |
| 2210 | break; |
| 2211 | } |
| 2212 | |
| 2213 | rx_pkt = sys->repl.cache[curr]; |
| 2214 | list_add_tail(&rx_pkt->link, &sys->head_desc_list); |
| 2215 | |
| 2216 | ret = sps_transfer_one(sys->ep->ep_hdl, |
| 2217 | rx_pkt->data.dma_addr, sys->rx_buff_sz, rx_pkt, 0); |
| 2218 | |
| 2219 | if (ret) { |
| 2220 | IPAERR("sps_transfer_one failed %d\n", ret); |
| 2221 | list_del(&rx_pkt->link); |
| 2222 | break; |
| 2223 | } |
| 2224 | rx_len_cached = ++sys->len; |
| 2225 | sys->repl_trig_cnt++; |
| 2226 | curr = (curr + 1) % sys->repl.capacity; |
| 2227 | /* ensure write is done before setting head index */ |
| 2228 | mb(); |
| 2229 | atomic_set(&sys->repl.head_idx, curr); |
| 2230 | } |
| 2231 | |
| 2232 | if (sys->repl_trig_cnt % sys->repl_trig_thresh == 0) |
| 2233 | queue_work(sys->repl_wq, &sys->repl_work); |
| 2234 | |
| 2235 | if (rx_len_cached <= sys->ep->rx_replenish_threshold) { |
| 2236 | if (rx_len_cached == 0) { |
| 2237 | if (sys->ep->client == IPA_CLIENT_APPS_WAN_CONS) |
| 2238 | IPA_STATS_INC_CNT(ipa_ctx->stats.wan_rx_empty); |
| 2239 | else if (sys->ep->client == IPA_CLIENT_APPS_LAN_CONS) |
| 2240 | IPA_STATS_INC_CNT(ipa_ctx->stats.lan_rx_empty); |
| 2241 | else |
| 2242 | WARN_ON(1); |
| 2243 | } |
| 2244 | sys->repl_trig_cnt = 0; |
| 2245 | queue_delayed_work(sys->wq, &sys->replenish_rx_work, |
| 2246 | msecs_to_jiffies(1)); |
| 2247 | } |
| 2248 | } |
| 2249 | |
| 2250 | static void replenish_rx_work_func(struct work_struct *work) |
| 2251 | { |
| 2252 | struct delayed_work *dwork; |
| 2253 | struct ipa_sys_context *sys; |
| 2254 | |
| 2255 | dwork = container_of(work, struct delayed_work, work); |
| 2256 | sys = container_of(dwork, struct ipa_sys_context, replenish_rx_work); |
| 2257 | IPA_ACTIVE_CLIENTS_INC_SIMPLE(); |
| 2258 | sys->repl_hdlr(sys); |
| 2259 | IPA_ACTIVE_CLIENTS_DEC_SIMPLE(); |
| 2260 | } |
| 2261 | |
| 2262 | /** |
| 2263 | * ipa_cleanup_rx() - release RX queue resources |
| 2264 | * |
| 2265 | */ |
| 2266 | static void ipa_cleanup_rx(struct ipa_sys_context *sys) |
| 2267 | { |
| 2268 | struct ipa_rx_pkt_wrapper *rx_pkt; |
| 2269 | struct ipa_rx_pkt_wrapper *r; |
| 2270 | u32 head; |
| 2271 | u32 tail; |
| 2272 | |
| 2273 | list_for_each_entry_safe(rx_pkt, r, |
| 2274 | &sys->head_desc_list, link) { |
| 2275 | list_del(&rx_pkt->link); |
| 2276 | dma_unmap_single(ipa_ctx->pdev, rx_pkt->data.dma_addr, |
| 2277 | sys->rx_buff_sz, DMA_FROM_DEVICE); |
| 2278 | sys->free_skb(rx_pkt->data.skb); |
| 2279 | kmem_cache_free(ipa_ctx->rx_pkt_wrapper_cache, rx_pkt); |
| 2280 | } |
| 2281 | |
| 2282 | list_for_each_entry_safe(rx_pkt, r, |
| 2283 | &sys->rcycl_list, link) { |
| 2284 | list_del(&rx_pkt->link); |
| 2285 | dma_unmap_single(ipa_ctx->pdev, rx_pkt->data.dma_addr, |
| 2286 | sys->rx_buff_sz, DMA_FROM_DEVICE); |
| 2287 | sys->free_skb(rx_pkt->data.skb); |
| 2288 | kmem_cache_free(ipa_ctx->rx_pkt_wrapper_cache, rx_pkt); |
| 2289 | } |
| 2290 | |
| 2291 | if (sys->repl.cache) { |
| 2292 | head = atomic_read(&sys->repl.head_idx); |
| 2293 | tail = atomic_read(&sys->repl.tail_idx); |
| 2294 | while (head != tail) { |
| 2295 | rx_pkt = sys->repl.cache[head]; |
| 2296 | dma_unmap_single(ipa_ctx->pdev, rx_pkt->data.dma_addr, |
| 2297 | sys->rx_buff_sz, DMA_FROM_DEVICE); |
| 2298 | sys->free_skb(rx_pkt->data.skb); |
| 2299 | kmem_cache_free(ipa_ctx->rx_pkt_wrapper_cache, rx_pkt); |
| 2300 | head = (head + 1) % sys->repl.capacity; |
| 2301 | } |
| 2302 | kfree(sys->repl.cache); |
| 2303 | } |
| 2304 | } |
| 2305 | |
| 2306 | static struct sk_buff *ipa_skb_copy_for_client(struct sk_buff *skb, int len) |
| 2307 | { |
| 2308 | struct sk_buff *skb2 = NULL; |
| 2309 | |
| 2310 | skb2 = __dev_alloc_skb(len + IPA_RX_BUFF_CLIENT_HEADROOM, GFP_KERNEL); |
| 2311 | if (likely(skb2)) { |
| 2312 | /* Set the data pointer */ |
| 2313 | skb_reserve(skb2, IPA_RX_BUFF_CLIENT_HEADROOM); |
| 2314 | memcpy(skb2->data, skb->data, len); |
| 2315 | skb2->len = len; |
| 2316 | skb_set_tail_pointer(skb2, len); |
| 2317 | } |
| 2318 | |
| 2319 | return skb2; |
| 2320 | } |
| 2321 | |
| 2322 | static int ipa_lan_rx_pyld_hdlr(struct sk_buff *skb, |
| 2323 | struct ipa_sys_context *sys) |
| 2324 | { |
| 2325 | int rc = 0; |
| 2326 | struct ipa_hw_pkt_status *status; |
| 2327 | struct sk_buff *skb2; |
| 2328 | int pad_len_byte; |
| 2329 | int len; |
| 2330 | unsigned char *buf; |
| 2331 | int src_pipe; |
| 2332 | unsigned int used = *(unsigned int *)skb->cb; |
| 2333 | unsigned int used_align = ALIGN(used, 32); |
| 2334 | unsigned long unused = IPA_GENERIC_RX_BUFF_BASE_SZ - used; |
Skylar Chang | e985d27 | 2016-12-05 18:10:19 -0800 | [diff] [blame] | 2335 | u32 skb2_len; |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 2336 | |
| 2337 | IPA_DUMP_BUFF(skb->data, 0, skb->len); |
| 2338 | |
| 2339 | if (skb->len == 0) { |
| 2340 | IPAERR("ZLT\n"); |
| 2341 | sys->free_skb(skb); |
| 2342 | return rc; |
| 2343 | } |
| 2344 | |
| 2345 | if (sys->len_partial) { |
| 2346 | IPADBG("len_partial %d\n", sys->len_partial); |
| 2347 | buf = skb_push(skb, sys->len_partial); |
| 2348 | memcpy(buf, sys->prev_skb->data, sys->len_partial); |
| 2349 | sys->len_partial = 0; |
| 2350 | sys->free_skb(sys->prev_skb); |
| 2351 | sys->prev_skb = NULL; |
| 2352 | goto begin; |
| 2353 | } |
| 2354 | |
| 2355 | /* this pipe has TX comp (status only) + mux-ed LAN RX data |
| 2356 | * (status+data) |
| 2357 | */ |
| 2358 | if (sys->len_rem) { |
| 2359 | IPADBG("rem %d skb %d pad %d\n", sys->len_rem, skb->len, |
| 2360 | sys->len_pad); |
| 2361 | if (sys->len_rem <= skb->len) { |
| 2362 | if (sys->prev_skb) { |
| 2363 | skb2 = skb_copy_expand(sys->prev_skb, 0, |
| 2364 | sys->len_rem, GFP_KERNEL); |
| 2365 | if (likely(skb2)) { |
| 2366 | memcpy(skb_put(skb2, sys->len_rem), |
| 2367 | skb->data, sys->len_rem); |
| 2368 | skb_trim(skb2, |
| 2369 | skb2->len - sys->len_pad); |
| 2370 | skb2->truesize = skb2->len + |
| 2371 | sizeof(struct sk_buff); |
| 2372 | if (sys->drop_packet) |
| 2373 | dev_kfree_skb_any(skb2); |
| 2374 | else |
| 2375 | sys->ep->client_notify( |
| 2376 | sys->ep->priv, |
| 2377 | IPA_RECEIVE, |
| 2378 | (unsigned long)(skb2)); |
| 2379 | } else { |
| 2380 | IPAERR("copy expand failed\n"); |
| 2381 | } |
| 2382 | dev_kfree_skb_any(sys->prev_skb); |
| 2383 | } |
| 2384 | skb_pull(skb, sys->len_rem); |
| 2385 | sys->prev_skb = NULL; |
| 2386 | sys->len_rem = 0; |
| 2387 | sys->len_pad = 0; |
| 2388 | } else { |
| 2389 | if (sys->prev_skb) { |
| 2390 | skb2 = skb_copy_expand(sys->prev_skb, 0, |
| 2391 | skb->len, GFP_KERNEL); |
| 2392 | if (likely(skb2)) { |
| 2393 | memcpy(skb_put(skb2, skb->len), |
| 2394 | skb->data, skb->len); |
| 2395 | } else { |
| 2396 | IPAERR("copy expand failed\n"); |
| 2397 | } |
| 2398 | dev_kfree_skb_any(sys->prev_skb); |
| 2399 | sys->prev_skb = skb2; |
| 2400 | } |
| 2401 | sys->len_rem -= skb->len; |
| 2402 | sys->free_skb(skb); |
| 2403 | return rc; |
| 2404 | } |
| 2405 | } |
| 2406 | |
| 2407 | begin: |
| 2408 | while (skb->len) { |
| 2409 | sys->drop_packet = false; |
| 2410 | IPADBG("LEN_REM %d\n", skb->len); |
| 2411 | |
| 2412 | if (skb->len < IPA_PKT_STATUS_SIZE) { |
| 2413 | WARN_ON(sys->prev_skb != NULL); |
| 2414 | IPADBG("status straddles buffer\n"); |
Gidon Studinski | 3021a6f | 2016-11-10 12:48:48 +0200 | [diff] [blame] | 2415 | sys->prev_skb = skb_copy(skb, GFP_KERNEL); |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 2416 | sys->len_partial = skb->len; |
| 2417 | return rc; |
| 2418 | } |
| 2419 | |
| 2420 | status = (struct ipa_hw_pkt_status *)skb->data; |
| 2421 | IPADBG("STATUS opcode=%d src=%d dst=%d len=%d\n", |
| 2422 | status->status_opcode, status->endp_src_idx, |
| 2423 | status->endp_dest_idx, status->pkt_len); |
| 2424 | if (sys->status_stat) { |
| 2425 | sys->status_stat->status[sys->status_stat->curr] = |
| 2426 | *status; |
| 2427 | sys->status_stat->curr++; |
| 2428 | if (sys->status_stat->curr == IPA_MAX_STATUS_STAT_NUM) |
| 2429 | sys->status_stat->curr = 0; |
| 2430 | } |
| 2431 | |
| 2432 | if (status->status_opcode != |
| 2433 | IPA_HW_STATUS_OPCODE_DROPPED_PACKET && |
| 2434 | status->status_opcode != |
| 2435 | IPA_HW_STATUS_OPCODE_PACKET && |
| 2436 | status->status_opcode != |
| 2437 | IPA_HW_STATUS_OPCODE_SUSPENDED_PACKET && |
| 2438 | status->status_opcode != |
| 2439 | IPA_HW_STATUS_OPCODE_XLAT_PACKET) { |
| 2440 | IPAERR("unsupported opcode(%d)\n", |
| 2441 | status->status_opcode); |
| 2442 | skb_pull(skb, IPA_PKT_STATUS_SIZE); |
| 2443 | continue; |
| 2444 | } |
| 2445 | IPA_STATS_EXCP_CNT(status->exception, |
| 2446 | ipa_ctx->stats.rx_excp_pkts); |
| 2447 | if (status->endp_dest_idx >= ipa_ctx->ipa_num_pipes || |
| 2448 | status->endp_src_idx >= ipa_ctx->ipa_num_pipes) { |
| 2449 | IPAERR("status fields invalid\n"); |
| 2450 | IPAERR("STATUS opcode=%d src=%d dst=%d len=%d\n", |
| 2451 | status->status_opcode, status->endp_src_idx, |
| 2452 | status->endp_dest_idx, status->pkt_len); |
| 2453 | WARN_ON(1); |
| 2454 | BUG(); |
| 2455 | } |
| 2456 | if (status->status_mask & IPA_HW_PKT_STATUS_MASK_TAG_VALID) { |
| 2457 | struct ipa_tag_completion *comp; |
| 2458 | |
| 2459 | IPADBG("TAG packet arrived\n"); |
| 2460 | if (status->tag_f_2 == IPA_COOKIE) { |
| 2461 | skb_pull(skb, IPA_PKT_STATUS_SIZE); |
| 2462 | if (skb->len < sizeof(comp)) { |
| 2463 | IPAERR("TAG arrived without packet\n"); |
| 2464 | return rc; |
| 2465 | } |
| 2466 | memcpy(&comp, skb->data, sizeof(comp)); |
| 2467 | skb_pull(skb, sizeof(comp) + |
| 2468 | IPA_SIZE_DL_CSUM_META_TRAILER); |
| 2469 | complete(&comp->comp); |
| 2470 | if (atomic_dec_return(&comp->cnt) == 0) |
| 2471 | kfree(comp); |
| 2472 | continue; |
| 2473 | } else { |
| 2474 | IPADBG("ignoring TAG with wrong cookie\n"); |
| 2475 | } |
| 2476 | } |
| 2477 | if (status->pkt_len == 0) { |
| 2478 | IPADBG("Skip aggr close status\n"); |
| 2479 | skb_pull(skb, IPA_PKT_STATUS_SIZE); |
| 2480 | IPA_STATS_INC_CNT(ipa_ctx->stats.aggr_close); |
| 2481 | IPA_STATS_DEC_CNT( |
| 2482 | ipa_ctx->stats.rx_excp_pkts[MAX_NUM_EXCP - 1]); |
| 2483 | continue; |
| 2484 | } |
| 2485 | if (status->endp_dest_idx == (sys->ep - ipa_ctx->ep)) { |
| 2486 | /* RX data */ |
| 2487 | src_pipe = status->endp_src_idx; |
| 2488 | |
| 2489 | /* |
| 2490 | * A packet which is received back to the AP after |
| 2491 | * there was no route match. |
| 2492 | */ |
| 2493 | if (!status->exception && !status->route_match) |
| 2494 | sys->drop_packet = true; |
| 2495 | |
| 2496 | if (skb->len == IPA_PKT_STATUS_SIZE && |
| 2497 | !status->exception) { |
| 2498 | WARN_ON(sys->prev_skb != NULL); |
| 2499 | IPADBG("Ins header in next buffer\n"); |
Gidon Studinski | 3021a6f | 2016-11-10 12:48:48 +0200 | [diff] [blame] | 2500 | sys->prev_skb = skb_copy(skb, GFP_KERNEL); |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 2501 | sys->len_partial = skb->len; |
| 2502 | return rc; |
| 2503 | } |
| 2504 | |
| 2505 | pad_len_byte = ((status->pkt_len + 3) & ~3) - |
| 2506 | status->pkt_len; |
| 2507 | |
| 2508 | len = status->pkt_len + pad_len_byte + |
| 2509 | IPA_SIZE_DL_CSUM_META_TRAILER; |
| 2510 | IPADBG("pad %d pkt_len %d len %d\n", pad_len_byte, |
| 2511 | status->pkt_len, len); |
| 2512 | |
| 2513 | if (status->exception == |
| 2514 | IPA_HW_PKT_STATUS_EXCEPTION_DEAGGR) { |
| 2515 | IPADBG("Dropping packet on DeAggr Exception\n"); |
| 2516 | sys->drop_packet = true; |
| 2517 | } |
| 2518 | |
Skylar Chang | e985d27 | 2016-12-05 18:10:19 -0800 | [diff] [blame] | 2519 | skb2_len = status->pkt_len + IPA_PKT_STATUS_SIZE; |
| 2520 | skb2_len = min(skb2_len, skb->len); |
| 2521 | skb2 = ipa_skb_copy_for_client(skb, skb2_len); |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 2522 | if (likely(skb2)) { |
| 2523 | if (skb->len < len + IPA_PKT_STATUS_SIZE) { |
| 2524 | IPADBG("SPL skb len %d len %d\n", |
| 2525 | skb->len, len); |
| 2526 | sys->prev_skb = skb2; |
| 2527 | sys->len_rem = len - skb->len + |
| 2528 | IPA_PKT_STATUS_SIZE; |
| 2529 | sys->len_pad = pad_len_byte; |
| 2530 | skb_pull(skb, skb->len); |
| 2531 | } else { |
| 2532 | skb_trim(skb2, status->pkt_len + |
| 2533 | IPA_PKT_STATUS_SIZE); |
| 2534 | IPADBG("rx avail for %d\n", |
| 2535 | status->endp_dest_idx); |
| 2536 | if (sys->drop_packet) { |
| 2537 | dev_kfree_skb_any(skb2); |
| 2538 | } else if (status->pkt_len > |
| 2539 | IPA_GENERIC_AGGR_BYTE_LIMIT * |
| 2540 | 1024) { |
| 2541 | IPAERR("packet size invalid\n"); |
| 2542 | IPAERR("STATUS opcode=%d\n", |
| 2543 | status->status_opcode); |
| 2544 | IPAERR("src=%d dst=%d len=%d\n", |
| 2545 | status->endp_src_idx, |
| 2546 | status->endp_dest_idx, |
| 2547 | status->pkt_len); |
| 2548 | BUG(); |
| 2549 | } else { |
| 2550 | skb2->truesize = skb2->len + |
| 2551 | sizeof(struct sk_buff) + |
| 2552 | (ALIGN(len + |
| 2553 | IPA_PKT_STATUS_SIZE, 32) * |
| 2554 | unused / used_align); |
| 2555 | sys->ep->client_notify( |
| 2556 | sys->ep->priv, |
| 2557 | IPA_RECEIVE, |
| 2558 | (unsigned long)(skb2)); |
| 2559 | } |
| 2560 | skb_pull(skb, len + |
| 2561 | IPA_PKT_STATUS_SIZE); |
| 2562 | } |
| 2563 | } else { |
| 2564 | IPAERR("fail to alloc skb\n"); |
| 2565 | if (skb->len < len) { |
| 2566 | sys->prev_skb = NULL; |
| 2567 | sys->len_rem = len - skb->len + |
| 2568 | IPA_PKT_STATUS_SIZE; |
| 2569 | sys->len_pad = pad_len_byte; |
| 2570 | skb_pull(skb, skb->len); |
| 2571 | } else { |
| 2572 | skb_pull(skb, len + |
| 2573 | IPA_PKT_STATUS_SIZE); |
| 2574 | } |
| 2575 | } |
| 2576 | /* TX comp */ |
| 2577 | ipa_wq_write_done_status(src_pipe); |
| 2578 | IPADBG("tx comp imp for %d\n", src_pipe); |
| 2579 | } else { |
| 2580 | /* TX comp */ |
| 2581 | ipa_wq_write_done_status(status->endp_src_idx); |
| 2582 | IPADBG("tx comp exp for %d\n", status->endp_src_idx); |
| 2583 | skb_pull(skb, IPA_PKT_STATUS_SIZE); |
| 2584 | IPA_STATS_INC_CNT(ipa_ctx->stats.stat_compl); |
| 2585 | IPA_STATS_DEC_CNT( |
| 2586 | ipa_ctx->stats.rx_excp_pkts[MAX_NUM_EXCP - 1]); |
| 2587 | } |
| 2588 | }; |
| 2589 | |
| 2590 | sys->free_skb(skb); |
| 2591 | return rc; |
| 2592 | } |
| 2593 | |
| 2594 | static struct sk_buff *join_prev_skb(struct sk_buff *prev_skb, |
| 2595 | struct sk_buff *skb, unsigned int len) |
| 2596 | { |
| 2597 | struct sk_buff *skb2; |
| 2598 | |
| 2599 | skb2 = skb_copy_expand(prev_skb, 0, |
| 2600 | len, GFP_KERNEL); |
| 2601 | if (likely(skb2)) { |
| 2602 | memcpy(skb_put(skb2, len), |
| 2603 | skb->data, len); |
| 2604 | } else { |
| 2605 | IPAERR("copy expand failed\n"); |
| 2606 | skb2 = NULL; |
| 2607 | } |
| 2608 | dev_kfree_skb_any(prev_skb); |
| 2609 | |
| 2610 | return skb2; |
| 2611 | } |
| 2612 | |
| 2613 | static void wan_rx_handle_splt_pyld(struct sk_buff *skb, |
| 2614 | struct ipa_sys_context *sys) |
| 2615 | { |
| 2616 | struct sk_buff *skb2; |
| 2617 | |
| 2618 | IPADBG("rem %d skb %d\n", sys->len_rem, skb->len); |
| 2619 | if (sys->len_rem <= skb->len) { |
| 2620 | if (sys->prev_skb) { |
| 2621 | skb2 = join_prev_skb(sys->prev_skb, skb, |
| 2622 | sys->len_rem); |
| 2623 | if (likely(skb2)) { |
| 2624 | IPADBG( |
| 2625 | "removing Status element from skb and sending to WAN client"); |
| 2626 | skb_pull(skb2, IPA_PKT_STATUS_SIZE); |
| 2627 | skb2->truesize = skb2->len + |
| 2628 | sizeof(struct sk_buff); |
| 2629 | sys->ep->client_notify(sys->ep->priv, |
| 2630 | IPA_RECEIVE, |
| 2631 | (unsigned long)(skb2)); |
| 2632 | } |
| 2633 | } |
| 2634 | skb_pull(skb, sys->len_rem); |
| 2635 | sys->prev_skb = NULL; |
| 2636 | sys->len_rem = 0; |
| 2637 | } else { |
| 2638 | if (sys->prev_skb) { |
| 2639 | skb2 = join_prev_skb(sys->prev_skb, skb, |
| 2640 | skb->len); |
| 2641 | sys->prev_skb = skb2; |
| 2642 | } |
| 2643 | sys->len_rem -= skb->len; |
| 2644 | skb_pull(skb, skb->len); |
| 2645 | } |
| 2646 | } |
| 2647 | |
| 2648 | static int ipa_wan_rx_pyld_hdlr(struct sk_buff *skb, |
| 2649 | struct ipa_sys_context *sys) |
| 2650 | { |
| 2651 | int rc = 0; |
| 2652 | struct ipa_hw_pkt_status *status; |
| 2653 | struct sk_buff *skb2; |
| 2654 | u16 pkt_len_with_pad; |
| 2655 | u32 qmap_hdr; |
| 2656 | int checksum_trailer_exists; |
| 2657 | int frame_len; |
| 2658 | int ep_idx; |
| 2659 | unsigned int used = *(unsigned int *)skb->cb; |
| 2660 | unsigned int used_align = ALIGN(used, 32); |
| 2661 | unsigned long unused = IPA_GENERIC_RX_BUFF_BASE_SZ - used; |
| 2662 | |
| 2663 | IPA_DUMP_BUFF(skb->data, 0, skb->len); |
| 2664 | if (skb->len == 0) { |
| 2665 | IPAERR("ZLT\n"); |
| 2666 | goto bail; |
| 2667 | } |
| 2668 | |
| 2669 | if (ipa_ctx->ipa_client_apps_wan_cons_agg_gro) { |
| 2670 | sys->ep->client_notify(sys->ep->priv, |
| 2671 | IPA_RECEIVE, (unsigned long)(skb)); |
| 2672 | return rc; |
| 2673 | } |
| 2674 | if (sys->repl_hdlr == ipa_replenish_rx_cache_recycle) { |
| 2675 | IPAERR("Recycle should enable only with GRO Aggr\n"); |
| 2676 | ipa_assert(); |
| 2677 | } |
| 2678 | /* |
| 2679 | * payload splits across 2 buff or more, |
| 2680 | * take the start of the payload from prev_skb |
| 2681 | */ |
| 2682 | if (sys->len_rem) |
| 2683 | wan_rx_handle_splt_pyld(skb, sys); |
| 2684 | |
| 2685 | |
| 2686 | while (skb->len) { |
| 2687 | IPADBG("LEN_REM %d\n", skb->len); |
| 2688 | if (skb->len < IPA_PKT_STATUS_SIZE) { |
| 2689 | IPAERR("status straddles buffer\n"); |
| 2690 | WARN_ON(1); |
| 2691 | goto bail; |
| 2692 | } |
| 2693 | status = (struct ipa_hw_pkt_status *)skb->data; |
| 2694 | IPADBG("STATUS opcode=%d src=%d dst=%d len=%d\n", |
| 2695 | status->status_opcode, status->endp_src_idx, |
| 2696 | status->endp_dest_idx, status->pkt_len); |
| 2697 | |
| 2698 | if (sys->status_stat) { |
| 2699 | sys->status_stat->status[sys->status_stat->curr] = |
| 2700 | *status; |
| 2701 | sys->status_stat->curr++; |
| 2702 | if (sys->status_stat->curr == IPA_MAX_STATUS_STAT_NUM) |
| 2703 | sys->status_stat->curr = 0; |
| 2704 | } |
| 2705 | |
| 2706 | if (status->status_opcode != |
| 2707 | IPA_HW_STATUS_OPCODE_DROPPED_PACKET && |
| 2708 | status->status_opcode != |
| 2709 | IPA_HW_STATUS_OPCODE_PACKET && |
| 2710 | status->status_opcode != |
| 2711 | IPA_HW_STATUS_OPCODE_XLAT_PACKET) { |
| 2712 | IPAERR("unsupported opcode\n"); |
| 2713 | skb_pull(skb, IPA_PKT_STATUS_SIZE); |
| 2714 | continue; |
| 2715 | } |
| 2716 | IPA_STATS_INC_CNT(ipa_ctx->stats.rx_pkts); |
| 2717 | if (status->endp_dest_idx >= ipa_ctx->ipa_num_pipes || |
| 2718 | status->endp_src_idx >= ipa_ctx->ipa_num_pipes || |
| 2719 | status->pkt_len > IPA_GENERIC_AGGR_BYTE_LIMIT * 1024) { |
| 2720 | IPAERR("status fields invalid\n"); |
| 2721 | WARN_ON(1); |
| 2722 | goto bail; |
| 2723 | } |
| 2724 | if (status->pkt_len == 0) { |
| 2725 | IPADBG("Skip aggr close status\n"); |
| 2726 | skb_pull(skb, IPA_PKT_STATUS_SIZE); |
| 2727 | IPA_STATS_DEC_CNT(ipa_ctx->stats.rx_pkts); |
| 2728 | IPA_STATS_INC_CNT(ipa_ctx->stats.wan_aggr_close); |
| 2729 | continue; |
| 2730 | } |
| 2731 | ep_idx = ipa2_get_ep_mapping(IPA_CLIENT_APPS_WAN_CONS); |
| 2732 | if (status->endp_dest_idx != ep_idx) { |
| 2733 | IPAERR("expected endp_dest_idx %d received %d\n", |
| 2734 | ep_idx, status->endp_dest_idx); |
| 2735 | WARN_ON(1); |
| 2736 | goto bail; |
| 2737 | } |
| 2738 | /* RX data */ |
| 2739 | if (skb->len == IPA_PKT_STATUS_SIZE) { |
| 2740 | IPAERR("Ins header in next buffer\n"); |
| 2741 | WARN_ON(1); |
| 2742 | goto bail; |
| 2743 | } |
| 2744 | qmap_hdr = *(u32 *)(status+1); |
| 2745 | /* |
| 2746 | * Take the pkt_len_with_pad from the last 2 bytes of the QMAP |
| 2747 | * header |
| 2748 | */ |
| 2749 | |
| 2750 | /*QMAP is BE: convert the pkt_len field from BE to LE*/ |
| 2751 | pkt_len_with_pad = ntohs((qmap_hdr>>16) & 0xffff); |
| 2752 | IPADBG("pkt_len with pad %d\n", pkt_len_with_pad); |
| 2753 | /*get the CHECKSUM_PROCESS bit*/ |
| 2754 | checksum_trailer_exists = status->status_mask & |
| 2755 | IPA_HW_PKT_STATUS_MASK_CKSUM_PROCESS; |
| 2756 | IPADBG("checksum_trailer_exists %d\n", |
| 2757 | checksum_trailer_exists); |
| 2758 | |
| 2759 | frame_len = IPA_PKT_STATUS_SIZE + |
| 2760 | IPA_QMAP_HEADER_LENGTH + |
| 2761 | pkt_len_with_pad; |
| 2762 | if (checksum_trailer_exists) |
| 2763 | frame_len += IPA_DL_CHECKSUM_LENGTH; |
| 2764 | IPADBG("frame_len %d\n", frame_len); |
| 2765 | |
| 2766 | skb2 = skb_clone(skb, GFP_KERNEL); |
| 2767 | if (likely(skb2)) { |
| 2768 | /* |
| 2769 | * the len of actual data is smaller than expected |
| 2770 | * payload split across 2 buff |
| 2771 | */ |
| 2772 | if (skb->len < frame_len) { |
| 2773 | IPADBG("SPL skb len %d len %d\n", |
| 2774 | skb->len, frame_len); |
| 2775 | sys->prev_skb = skb2; |
| 2776 | sys->len_rem = frame_len - skb->len; |
| 2777 | skb_pull(skb, skb->len); |
| 2778 | } else { |
| 2779 | skb_trim(skb2, frame_len); |
| 2780 | IPADBG("rx avail for %d\n", |
| 2781 | status->endp_dest_idx); |
| 2782 | IPADBG( |
| 2783 | "removing Status element from skb and sending to WAN client"); |
| 2784 | skb_pull(skb2, IPA_PKT_STATUS_SIZE); |
| 2785 | skb2->truesize = skb2->len + |
| 2786 | sizeof(struct sk_buff) + |
| 2787 | (ALIGN(frame_len, 32) * |
| 2788 | unused / used_align); |
| 2789 | sys->ep->client_notify(sys->ep->priv, |
| 2790 | IPA_RECEIVE, (unsigned long)(skb2)); |
| 2791 | skb_pull(skb, frame_len); |
| 2792 | } |
| 2793 | } else { |
| 2794 | IPAERR("fail to clone\n"); |
| 2795 | if (skb->len < frame_len) { |
| 2796 | sys->prev_skb = NULL; |
| 2797 | sys->len_rem = frame_len - skb->len; |
| 2798 | skb_pull(skb, skb->len); |
| 2799 | } else { |
| 2800 | skb_pull(skb, frame_len); |
| 2801 | } |
| 2802 | } |
| 2803 | }; |
| 2804 | bail: |
| 2805 | sys->free_skb(skb); |
| 2806 | return rc; |
| 2807 | } |
| 2808 | |
| 2809 | static int ipa_rx_pyld_hdlr(struct sk_buff *rx_skb, struct ipa_sys_context *sys) |
| 2810 | { |
| 2811 | struct ipa_a5_mux_hdr *mux_hdr; |
| 2812 | unsigned int pull_len; |
| 2813 | unsigned int padding; |
| 2814 | struct ipa_ep_context *ep; |
| 2815 | unsigned int src_pipe; |
| 2816 | |
| 2817 | mux_hdr = (struct ipa_a5_mux_hdr *)rx_skb->data; |
| 2818 | |
| 2819 | src_pipe = mux_hdr->src_pipe_index; |
| 2820 | |
| 2821 | IPADBG("RX pkt len=%d IID=0x%x src=%d, flags=0x%x, meta=0x%x\n", |
| 2822 | rx_skb->len, ntohs(mux_hdr->interface_id), |
| 2823 | src_pipe, mux_hdr->flags, ntohl(mux_hdr->metadata)); |
| 2824 | |
| 2825 | IPA_DUMP_BUFF(rx_skb->data, 0, rx_skb->len); |
| 2826 | |
| 2827 | IPA_STATS_INC_CNT(ipa_ctx->stats.rx_pkts); |
| 2828 | IPA_STATS_EXCP_CNT(mux_hdr->flags, ipa_ctx->stats.rx_excp_pkts); |
| 2829 | |
| 2830 | /* |
| 2831 | * Any packets arriving over AMPDU_TX should be dispatched |
| 2832 | * to the regular WLAN RX data-path. |
| 2833 | */ |
| 2834 | if (unlikely(src_pipe == WLAN_AMPDU_TX_EP)) |
| 2835 | src_pipe = WLAN_PROD_TX_EP; |
| 2836 | |
| 2837 | ep = &ipa_ctx->ep[src_pipe]; |
| 2838 | spin_lock(&ipa_ctx->disconnect_lock); |
| 2839 | if (unlikely(src_pipe >= ipa_ctx->ipa_num_pipes || |
| 2840 | !ep->valid || !ep->client_notify)) { |
| 2841 | IPAERR("drop pipe=%d ep_valid=%d client_notify=%p\n", |
| 2842 | src_pipe, ep->valid, ep->client_notify); |
| 2843 | dev_kfree_skb_any(rx_skb); |
| 2844 | spin_unlock(&ipa_ctx->disconnect_lock); |
| 2845 | return 0; |
| 2846 | } |
| 2847 | |
| 2848 | pull_len = sizeof(struct ipa_a5_mux_hdr); |
| 2849 | |
| 2850 | /* |
| 2851 | * IP packet starts on word boundary |
| 2852 | * remove the MUX header and any padding and pass the frame to |
| 2853 | * the client which registered a rx callback on the "src pipe" |
| 2854 | */ |
| 2855 | padding = ep->cfg.hdr.hdr_len & 0x3; |
| 2856 | if (padding) |
| 2857 | pull_len += 4 - padding; |
| 2858 | |
| 2859 | IPADBG("pulling %d bytes from skb\n", pull_len); |
| 2860 | skb_pull(rx_skb, pull_len); |
| 2861 | ep->client_notify(ep->priv, IPA_RECEIVE, |
| 2862 | (unsigned long)(rx_skb)); |
| 2863 | spin_unlock(&ipa_ctx->disconnect_lock); |
| 2864 | return 0; |
| 2865 | } |
| 2866 | |
| 2867 | static struct sk_buff *ipa_get_skb_ipa_rx(unsigned int len, gfp_t flags) |
| 2868 | { |
| 2869 | return __dev_alloc_skb(len, flags); |
| 2870 | } |
| 2871 | |
| 2872 | static struct sk_buff *ipa_get_skb_ipa_rx_headroom(unsigned int len, |
| 2873 | gfp_t flags) |
| 2874 | { |
| 2875 | struct sk_buff *skb; |
| 2876 | |
| 2877 | skb = __dev_alloc_skb(len + IPA_HEADROOM, flags); |
| 2878 | if (skb) |
| 2879 | skb_reserve(skb, IPA_HEADROOM); |
| 2880 | |
| 2881 | return skb; |
| 2882 | } |
| 2883 | |
| 2884 | static void ipa_free_skb_rx(struct sk_buff *skb) |
| 2885 | { |
| 2886 | dev_kfree_skb_any(skb); |
| 2887 | } |
| 2888 | |
| 2889 | void ipa_lan_rx_cb(void *priv, enum ipa_dp_evt_type evt, unsigned long data) |
| 2890 | { |
| 2891 | struct sk_buff *rx_skb = (struct sk_buff *)data; |
| 2892 | struct ipa_hw_pkt_status *status; |
| 2893 | struct ipa_ep_context *ep; |
| 2894 | unsigned int src_pipe; |
| 2895 | u32 metadata; |
| 2896 | |
| 2897 | status = (struct ipa_hw_pkt_status *)rx_skb->data; |
| 2898 | src_pipe = status->endp_src_idx; |
| 2899 | metadata = status->metadata; |
| 2900 | ep = &ipa_ctx->ep[src_pipe]; |
| 2901 | if (unlikely(src_pipe >= ipa_ctx->ipa_num_pipes || |
| 2902 | !ep->valid || |
| 2903 | !ep->client_notify)) { |
| 2904 | IPAERR("drop pipe=%d ep_valid=%d client_notify=%p\n", |
| 2905 | src_pipe, ep->valid, ep->client_notify); |
| 2906 | dev_kfree_skb_any(rx_skb); |
| 2907 | return; |
| 2908 | } |
| 2909 | if (!status->exception) |
| 2910 | skb_pull(rx_skb, IPA_PKT_STATUS_SIZE + |
| 2911 | IPA_LAN_RX_HEADER_LENGTH); |
| 2912 | else |
| 2913 | skb_pull(rx_skb, IPA_PKT_STATUS_SIZE); |
| 2914 | |
| 2915 | /* |
| 2916 | * Metadata Info |
| 2917 | * ------------------------------------------ |
| 2918 | * | 3 | 2 | 1 | 0 | |
| 2919 | * | fw_desc | vdev_id | qmap mux id | Resv | |
| 2920 | * ------------------------------------------ |
| 2921 | */ |
| 2922 | *(u16 *)rx_skb->cb = ((metadata >> 16) & 0xFFFF); |
| 2923 | IPADBG("meta_data: 0x%x cb: 0x%x\n", |
| 2924 | metadata, *(u32 *)rx_skb->cb); |
| 2925 | |
| 2926 | ep->client_notify(ep->priv, IPA_RECEIVE, (unsigned long)(rx_skb)); |
| 2927 | } |
| 2928 | |
| 2929 | void ipa2_recycle_wan_skb(struct sk_buff *skb) |
| 2930 | { |
| 2931 | struct ipa_rx_pkt_wrapper *rx_pkt; |
| 2932 | int ep_idx = ipa2_get_ep_mapping( |
| 2933 | IPA_CLIENT_APPS_WAN_CONS); |
| 2934 | gfp_t flag = GFP_NOWAIT | __GFP_NOWARN | |
| 2935 | (ipa_ctx->use_dma_zone ? GFP_DMA : 0); |
| 2936 | |
| 2937 | if (unlikely(ep_idx == -1)) { |
| 2938 | IPAERR("dest EP does not exist\n"); |
| 2939 | ipa_assert(); |
| 2940 | } |
| 2941 | |
| 2942 | rx_pkt = kmem_cache_zalloc( |
| 2943 | ipa_ctx->rx_pkt_wrapper_cache, flag); |
| 2944 | if (!rx_pkt) |
| 2945 | ipa_assert(); |
| 2946 | |
| 2947 | INIT_WORK(&rx_pkt->work, ipa_wq_rx_avail); |
| 2948 | rx_pkt->sys = ipa_ctx->ep[ep_idx].sys; |
| 2949 | |
| 2950 | rx_pkt->data.skb = skb; |
| 2951 | rx_pkt->data.dma_addr = 0; |
| 2952 | ipa_skb_recycle(rx_pkt->data.skb); |
| 2953 | skb_reserve(rx_pkt->data.skb, IPA_HEADROOM); |
| 2954 | INIT_LIST_HEAD(&rx_pkt->link); |
| 2955 | spin_lock_bh(&rx_pkt->sys->spinlock); |
| 2956 | list_add_tail(&rx_pkt->link, &rx_pkt->sys->rcycl_list); |
| 2957 | spin_unlock_bh(&rx_pkt->sys->spinlock); |
| 2958 | } |
| 2959 | |
| 2960 | static void ipa_wq_rx_common(struct ipa_sys_context *sys, u32 size) |
| 2961 | { |
| 2962 | struct ipa_rx_pkt_wrapper *rx_pkt_expected; |
| 2963 | struct sk_buff *rx_skb; |
| 2964 | |
| 2965 | if (unlikely(list_empty(&sys->head_desc_list))) { |
| 2966 | WARN_ON(1); |
| 2967 | return; |
| 2968 | } |
| 2969 | rx_pkt_expected = list_first_entry(&sys->head_desc_list, |
| 2970 | struct ipa_rx_pkt_wrapper, |
| 2971 | link); |
| 2972 | list_del(&rx_pkt_expected->link); |
| 2973 | sys->len--; |
| 2974 | if (size) |
| 2975 | rx_pkt_expected->len = size; |
| 2976 | rx_skb = rx_pkt_expected->data.skb; |
| 2977 | dma_unmap_single(ipa_ctx->pdev, rx_pkt_expected->data.dma_addr, |
| 2978 | sys->rx_buff_sz, DMA_FROM_DEVICE); |
| 2979 | skb_set_tail_pointer(rx_skb, rx_pkt_expected->len); |
| 2980 | rx_skb->len = rx_pkt_expected->len; |
| 2981 | *(unsigned int *)rx_skb->cb = rx_skb->len; |
| 2982 | rx_skb->truesize = rx_pkt_expected->len + sizeof(struct sk_buff); |
| 2983 | sys->pyld_hdlr(rx_skb, sys); |
| 2984 | sys->repl_hdlr(sys); |
| 2985 | kmem_cache_free(ipa_ctx->rx_pkt_wrapper_cache, rx_pkt_expected); |
| 2986 | |
| 2987 | } |
| 2988 | |
| 2989 | static void ipa_wlan_wq_rx_common(struct ipa_sys_context *sys, u32 size) |
| 2990 | { |
| 2991 | struct ipa_rx_pkt_wrapper *rx_pkt_expected; |
| 2992 | struct sk_buff *rx_skb; |
| 2993 | |
| 2994 | if (unlikely(list_empty(&sys->head_desc_list))) { |
| 2995 | WARN_ON(1); |
| 2996 | return; |
| 2997 | } |
| 2998 | rx_pkt_expected = list_first_entry(&sys->head_desc_list, |
| 2999 | struct ipa_rx_pkt_wrapper, |
| 3000 | link); |
| 3001 | list_del(&rx_pkt_expected->link); |
| 3002 | sys->len--; |
| 3003 | |
| 3004 | if (size) |
| 3005 | rx_pkt_expected->len = size; |
| 3006 | |
| 3007 | rx_skb = rx_pkt_expected->data.skb; |
| 3008 | skb_set_tail_pointer(rx_skb, rx_pkt_expected->len); |
| 3009 | rx_skb->len = rx_pkt_expected->len; |
| 3010 | rx_skb->truesize = rx_pkt_expected->len + sizeof(struct sk_buff); |
| 3011 | sys->ep->wstats.tx_pkts_rcvd++; |
| 3012 | if (sys->len <= IPA_WLAN_RX_POOL_SZ_LOW_WM) { |
| 3013 | ipa2_free_skb(&rx_pkt_expected->data); |
| 3014 | sys->ep->wstats.tx_pkts_dropped++; |
| 3015 | } else { |
| 3016 | sys->ep->wstats.tx_pkts_sent++; |
| 3017 | sys->ep->client_notify(sys->ep->priv, IPA_RECEIVE, |
| 3018 | (unsigned long)(&rx_pkt_expected->data)); |
| 3019 | } |
| 3020 | ipa_replenish_wlan_rx_cache(sys); |
| 3021 | } |
| 3022 | |
| 3023 | static void ipa_dma_memcpy_notify(struct ipa_sys_context *sys, |
| 3024 | struct sps_iovec *iovec) |
| 3025 | { |
| 3026 | IPADBG("ENTER.\n"); |
| 3027 | if (unlikely(list_empty(&sys->head_desc_list))) { |
| 3028 | IPAERR("descriptor list is empty!\n"); |
| 3029 | WARN_ON(1); |
| 3030 | return; |
| 3031 | } |
| 3032 | if (!(iovec->flags & SPS_IOVEC_FLAG_EOT)) { |
| 3033 | IPAERR("received unexpected event. sps flag is 0x%x\n" |
| 3034 | , iovec->flags); |
| 3035 | WARN_ON(1); |
| 3036 | return; |
| 3037 | } |
| 3038 | sys->ep->client_notify(sys->ep->priv, IPA_RECEIVE, |
| 3039 | (unsigned long)(iovec)); |
| 3040 | IPADBG("EXIT\n"); |
| 3041 | } |
| 3042 | |
| 3043 | static void ipa_wq_rx_avail(struct work_struct *work) |
| 3044 | { |
| 3045 | struct ipa_rx_pkt_wrapper *rx_pkt; |
| 3046 | struct ipa_sys_context *sys; |
| 3047 | |
| 3048 | rx_pkt = container_of(work, struct ipa_rx_pkt_wrapper, work); |
| 3049 | if (unlikely(rx_pkt == NULL)) |
| 3050 | WARN_ON(1); |
| 3051 | sys = rx_pkt->sys; |
| 3052 | ipa_wq_rx_common(sys, 0); |
| 3053 | } |
| 3054 | |
| 3055 | /** |
| 3056 | * ipa_sps_irq_rx_no_aggr_notify() - Callback function which will be called by |
| 3057 | * the SPS driver after a Rx operation is complete. |
| 3058 | * Called in an interrupt context. |
| 3059 | * @notify: SPS driver supplied notification struct |
| 3060 | * |
| 3061 | * This function defer the work for this event to a workqueue. |
| 3062 | */ |
| 3063 | void ipa_sps_irq_rx_no_aggr_notify(struct sps_event_notify *notify) |
| 3064 | { |
| 3065 | struct ipa_rx_pkt_wrapper *rx_pkt; |
| 3066 | |
| 3067 | switch (notify->event_id) { |
| 3068 | case SPS_EVENT_EOT: |
| 3069 | rx_pkt = notify->data.transfer.user; |
| 3070 | if (IPA_CLIENT_IS_APPS_CONS(rx_pkt->sys->ep->client)) |
| 3071 | atomic_set(&ipa_ctx->sps_pm.eot_activity, 1); |
| 3072 | rx_pkt->len = notify->data.transfer.iovec.size; |
| 3073 | IPADBG("event %d notified sys=%p len=%u\n", notify->event_id, |
| 3074 | notify->user, rx_pkt->len); |
| 3075 | queue_work(rx_pkt->sys->wq, &rx_pkt->work); |
| 3076 | break; |
| 3077 | default: |
| 3078 | IPAERR("received unexpected event id %d sys=%p\n", |
| 3079 | notify->event_id, notify->user); |
| 3080 | } |
| 3081 | } |
| 3082 | |
| 3083 | static int ipa_odu_rx_pyld_hdlr(struct sk_buff *rx_skb, |
| 3084 | struct ipa_sys_context *sys) |
| 3085 | { |
| 3086 | if (sys->ep->client_notify) { |
| 3087 | sys->ep->client_notify(sys->ep->priv, IPA_RECEIVE, |
| 3088 | (unsigned long)(rx_skb)); |
| 3089 | } else { |
| 3090 | dev_kfree_skb_any(rx_skb); |
| 3091 | WARN_ON(1); |
| 3092 | } |
| 3093 | |
| 3094 | return 0; |
| 3095 | } |
| 3096 | |
| 3097 | static int ipa_assign_policy_v2(struct ipa_sys_connect_params *in, |
| 3098 | struct ipa_sys_context *sys) |
| 3099 | { |
| 3100 | unsigned long int aggr_byte_limit; |
| 3101 | |
| 3102 | sys->ep->status.status_en = true; |
| 3103 | sys->ep->wakelock_client = IPA_WAKELOCK_REF_CLIENT_MAX; |
| 3104 | if (IPA_CLIENT_IS_PROD(in->client)) { |
| 3105 | if (!sys->ep->skip_ep_cfg) { |
| 3106 | sys->policy = IPA_POLICY_NOINTR_MODE; |
| 3107 | sys->sps_option = SPS_O_AUTO_ENABLE; |
| 3108 | sys->sps_callback = NULL; |
| 3109 | sys->ep->status.status_ep = ipa2_get_ep_mapping( |
| 3110 | IPA_CLIENT_APPS_LAN_CONS); |
| 3111 | if (IPA_CLIENT_IS_MEMCPY_DMA_PROD(in->client)) |
| 3112 | sys->ep->status.status_en = false; |
| 3113 | } else { |
| 3114 | sys->policy = IPA_POLICY_INTR_MODE; |
| 3115 | sys->sps_option = (SPS_O_AUTO_ENABLE | |
| 3116 | SPS_O_EOT); |
| 3117 | sys->sps_callback = |
| 3118 | ipa_sps_irq_tx_no_aggr_notify; |
| 3119 | } |
| 3120 | return 0; |
| 3121 | } |
| 3122 | |
| 3123 | aggr_byte_limit = |
| 3124 | (unsigned long int)IPA_GENERIC_RX_BUFF_SZ( |
| 3125 | ipa_adjust_ra_buff_base_sz( |
| 3126 | in->ipa_ep_cfg.aggr.aggr_byte_limit)); |
| 3127 | |
| 3128 | if (in->client == IPA_CLIENT_APPS_LAN_CONS || |
| 3129 | in->client == IPA_CLIENT_APPS_WAN_CONS) { |
| 3130 | sys->policy = IPA_POLICY_INTR_POLL_MODE; |
| 3131 | sys->sps_option = (SPS_O_AUTO_ENABLE | SPS_O_EOT |
| 3132 | | SPS_O_ACK_TRANSFERS); |
| 3133 | sys->sps_callback = ipa_sps_irq_rx_notify; |
| 3134 | INIT_WORK(&sys->work, ipa_wq_handle_rx); |
| 3135 | INIT_DELAYED_WORK(&sys->switch_to_intr_work, |
| 3136 | switch_to_intr_rx_work_func); |
| 3137 | INIT_DELAYED_WORK(&sys->replenish_rx_work, |
| 3138 | replenish_rx_work_func); |
| 3139 | INIT_WORK(&sys->repl_work, ipa_wq_repl_rx); |
| 3140 | atomic_set(&sys->curr_polling_state, 0); |
| 3141 | sys->rx_buff_sz = IPA_GENERIC_RX_BUFF_SZ( |
| 3142 | IPA_GENERIC_RX_BUFF_BASE_SZ) - |
| 3143 | IPA_HEADROOM; |
| 3144 | sys->get_skb = ipa_get_skb_ipa_rx_headroom; |
| 3145 | sys->free_skb = ipa_free_skb_rx; |
| 3146 | in->ipa_ep_cfg.aggr.aggr_en = IPA_ENABLE_AGGR; |
| 3147 | in->ipa_ep_cfg.aggr.aggr = IPA_GENERIC; |
| 3148 | in->ipa_ep_cfg.aggr.aggr_time_limit = |
| 3149 | IPA_GENERIC_AGGR_TIME_LIMIT; |
| 3150 | if (in->client == IPA_CLIENT_APPS_LAN_CONS) { |
| 3151 | sys->pyld_hdlr = ipa_lan_rx_pyld_hdlr; |
Utkarsh Saxena | 4badc04 | 2017-03-03 15:38:45 +0530 | [diff] [blame] | 3152 | sys->rx_pool_sz = |
| 3153 | ipa_ctx->lan_rx_ring_size; |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 3154 | if (nr_cpu_ids > 1) { |
| 3155 | sys->repl_hdlr = |
| 3156 | ipa_fast_replenish_rx_cache; |
| 3157 | sys->repl_trig_thresh = |
| 3158 | sys->rx_pool_sz / 8; |
| 3159 | } else { |
| 3160 | sys->repl_hdlr = |
| 3161 | ipa_replenish_rx_cache; |
| 3162 | } |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 3163 | in->ipa_ep_cfg.aggr.aggr_byte_limit = |
| 3164 | IPA_GENERIC_AGGR_BYTE_LIMIT; |
| 3165 | in->ipa_ep_cfg.aggr.aggr_pkt_limit = |
| 3166 | IPA_GENERIC_AGGR_PKT_LIMIT; |
| 3167 | sys->ep->wakelock_client = |
| 3168 | IPA_WAKELOCK_REF_CLIENT_LAN_RX; |
| 3169 | } else if (in->client == |
| 3170 | IPA_CLIENT_APPS_WAN_CONS) { |
| 3171 | sys->pyld_hdlr = ipa_wan_rx_pyld_hdlr; |
Gidon Studinski | 3021a6f | 2016-11-10 12:48:48 +0200 | [diff] [blame] | 3172 | sys->rx_pool_sz = ipa_ctx->wan_rx_ring_size; |
| 3173 | if (nr_cpu_ids > 1) { |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 3174 | sys->repl_hdlr = |
Gidon Studinski | 3021a6f | 2016-11-10 12:48:48 +0200 | [diff] [blame] | 3175 | ipa_fast_replenish_rx_cache; |
| 3176 | sys->repl_trig_thresh = |
| 3177 | sys->rx_pool_sz / 8; |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 3178 | } else { |
Gidon Studinski | 3021a6f | 2016-11-10 12:48:48 +0200 | [diff] [blame] | 3179 | sys->repl_hdlr = |
| 3180 | ipa_replenish_rx_cache; |
| 3181 | } |
Sunil Paidimarri | 226cf03 | 2016-10-14 13:33:08 -0700 | [diff] [blame^] | 3182 | if (in->napi_enabled && in->recycle_enabled) |
| 3183 | sys->repl_hdlr = |
| 3184 | ipa_replenish_rx_cache_recycle; |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 3185 | sys->ep->wakelock_client = |
| 3186 | IPA_WAKELOCK_REF_CLIENT_WAN_RX; |
| 3187 | in->ipa_ep_cfg.aggr.aggr_sw_eof_active |
| 3188 | = true; |
| 3189 | if (ipa_ctx->ipa_client_apps_wan_cons_agg_gro) { |
| 3190 | IPAERR("get close-by %u\n", |
| 3191 | ipa_adjust_ra_buff_base_sz( |
| 3192 | in->ipa_ep_cfg.aggr. |
| 3193 | aggr_byte_limit)); |
| 3194 | IPAERR("set rx_buff_sz %lu\n", aggr_byte_limit); |
| 3195 | /* disable ipa_status */ |
| 3196 | sys->ep->status. |
| 3197 | status_en = false; |
| 3198 | sys->rx_buff_sz = |
| 3199 | IPA_GENERIC_RX_BUFF_SZ( |
| 3200 | ipa_adjust_ra_buff_base_sz( |
| 3201 | in->ipa_ep_cfg.aggr. |
| 3202 | aggr_byte_limit - IPA_HEADROOM)); |
| 3203 | in->ipa_ep_cfg.aggr. |
| 3204 | aggr_byte_limit = |
| 3205 | sys->rx_buff_sz < in-> |
| 3206 | ipa_ep_cfg.aggr.aggr_byte_limit ? |
| 3207 | IPA_ADJUST_AGGR_BYTE_LIMIT( |
| 3208 | sys->rx_buff_sz) : |
| 3209 | IPA_ADJUST_AGGR_BYTE_LIMIT( |
| 3210 | in->ipa_ep_cfg. |
| 3211 | aggr.aggr_byte_limit); |
| 3212 | IPAERR("set aggr_limit %lu\n", |
| 3213 | (unsigned long int) |
| 3214 | in->ipa_ep_cfg.aggr. |
| 3215 | aggr_byte_limit); |
| 3216 | } else { |
| 3217 | in->ipa_ep_cfg.aggr. |
| 3218 | aggr_byte_limit = |
| 3219 | IPA_GENERIC_AGGR_BYTE_LIMIT; |
| 3220 | in->ipa_ep_cfg.aggr. |
| 3221 | aggr_pkt_limit = |
| 3222 | IPA_GENERIC_AGGR_PKT_LIMIT; |
| 3223 | } |
| 3224 | } |
| 3225 | } else if (IPA_CLIENT_IS_WLAN_CONS(in->client)) { |
| 3226 | IPADBG("assigning policy to client:%d", |
| 3227 | in->client); |
| 3228 | |
| 3229 | sys->ep->status.status_en = false; |
| 3230 | sys->policy = IPA_POLICY_INTR_POLL_MODE; |
| 3231 | sys->sps_option = (SPS_O_AUTO_ENABLE | SPS_O_EOT |
| 3232 | | SPS_O_ACK_TRANSFERS); |
| 3233 | sys->sps_callback = ipa_sps_irq_rx_notify; |
| 3234 | INIT_WORK(&sys->work, ipa_wq_handle_rx); |
| 3235 | INIT_DELAYED_WORK(&sys->switch_to_intr_work, |
| 3236 | switch_to_intr_rx_work_func); |
| 3237 | INIT_DELAYED_WORK(&sys->replenish_rx_work, |
| 3238 | replenish_rx_work_func); |
| 3239 | atomic_set(&sys->curr_polling_state, 0); |
| 3240 | sys->rx_buff_sz = IPA_WLAN_RX_BUFF_SZ; |
| 3241 | sys->rx_pool_sz = in->desc_fifo_sz / |
| 3242 | sizeof(struct sps_iovec) - 1; |
| 3243 | if (sys->rx_pool_sz > IPA_WLAN_RX_POOL_SZ) |
| 3244 | sys->rx_pool_sz = IPA_WLAN_RX_POOL_SZ; |
| 3245 | sys->pyld_hdlr = NULL; |
| 3246 | sys->repl_hdlr = ipa_replenish_wlan_rx_cache; |
| 3247 | sys->get_skb = ipa_get_skb_ipa_rx; |
| 3248 | sys->free_skb = ipa_free_skb_rx; |
| 3249 | in->ipa_ep_cfg.aggr.aggr_en = IPA_BYPASS_AGGR; |
| 3250 | sys->ep->wakelock_client = |
| 3251 | IPA_WAKELOCK_REF_CLIENT_WLAN_RX; |
| 3252 | } else if (IPA_CLIENT_IS_ODU_CONS(in->client)) { |
| 3253 | IPADBG("assigning policy to client:%d", |
| 3254 | in->client); |
| 3255 | |
| 3256 | sys->ep->status.status_en = false; |
| 3257 | sys->policy = IPA_POLICY_INTR_POLL_MODE; |
| 3258 | sys->sps_option = (SPS_O_AUTO_ENABLE | SPS_O_EOT |
| 3259 | | SPS_O_ACK_TRANSFERS); |
| 3260 | sys->sps_callback = ipa_sps_irq_rx_notify; |
| 3261 | INIT_WORK(&sys->work, ipa_wq_handle_rx); |
| 3262 | INIT_DELAYED_WORK(&sys->switch_to_intr_work, |
| 3263 | switch_to_intr_rx_work_func); |
| 3264 | INIT_DELAYED_WORK(&sys->replenish_rx_work, |
| 3265 | replenish_rx_work_func); |
| 3266 | atomic_set(&sys->curr_polling_state, 0); |
| 3267 | sys->rx_buff_sz = IPA_ODU_RX_BUFF_SZ; |
| 3268 | sys->rx_pool_sz = in->desc_fifo_sz / |
| 3269 | sizeof(struct sps_iovec) - 1; |
| 3270 | if (sys->rx_pool_sz > IPA_ODU_RX_POOL_SZ) |
| 3271 | sys->rx_pool_sz = IPA_ODU_RX_POOL_SZ; |
| 3272 | sys->pyld_hdlr = ipa_odu_rx_pyld_hdlr; |
| 3273 | sys->get_skb = ipa_get_skb_ipa_rx; |
| 3274 | sys->free_skb = ipa_free_skb_rx; |
| 3275 | sys->repl_hdlr = ipa_replenish_rx_cache; |
| 3276 | sys->ep->wakelock_client = |
| 3277 | IPA_WAKELOCK_REF_CLIENT_ODU_RX; |
| 3278 | } else if (in->client == |
| 3279 | IPA_CLIENT_MEMCPY_DMA_ASYNC_CONS) { |
| 3280 | IPADBG("assigning policy to client:%d", |
| 3281 | in->client); |
| 3282 | sys->ep->status.status_en = false; |
| 3283 | sys->policy = IPA_POLICY_INTR_POLL_MODE; |
| 3284 | sys->sps_option = (SPS_O_AUTO_ENABLE | SPS_O_EOT |
| 3285 | | SPS_O_ACK_TRANSFERS); |
| 3286 | sys->sps_callback = ipa_sps_irq_rx_notify; |
| 3287 | INIT_WORK(&sys->work, ipa_wq_handle_rx); |
| 3288 | INIT_DELAYED_WORK(&sys->switch_to_intr_work, |
| 3289 | switch_to_intr_rx_work_func); |
| 3290 | } else if (in->client == |
| 3291 | IPA_CLIENT_MEMCPY_DMA_SYNC_CONS) { |
| 3292 | IPADBG("assigning policy to client:%d", |
| 3293 | in->client); |
| 3294 | sys->ep->status.status_en = false; |
| 3295 | sys->policy = IPA_POLICY_NOINTR_MODE; |
| 3296 | sys->sps_option = SPS_O_AUTO_ENABLE | |
| 3297 | SPS_O_ACK_TRANSFERS | SPS_O_POLL; |
| 3298 | } else { |
| 3299 | IPAERR("Need to install a RX pipe hdlr\n"); |
| 3300 | WARN_ON(1); |
| 3301 | return -EINVAL; |
| 3302 | } |
| 3303 | return 0; |
| 3304 | } |
| 3305 | |
| 3306 | static int ipa_assign_policy(struct ipa_sys_connect_params *in, |
| 3307 | struct ipa_sys_context *sys) |
| 3308 | { |
| 3309 | if (in->client == IPA_CLIENT_APPS_CMD_PROD) { |
| 3310 | sys->policy = IPA_POLICY_INTR_MODE; |
| 3311 | sys->sps_option = (SPS_O_AUTO_ENABLE | SPS_O_EOT); |
| 3312 | sys->sps_callback = ipa_sps_irq_tx_no_aggr_notify; |
| 3313 | return 0; |
| 3314 | } |
| 3315 | |
| 3316 | if (ipa_ctx->ipa_hw_type == IPA_HW_v1_1) { |
| 3317 | if (in->client == IPA_CLIENT_APPS_LAN_WAN_PROD) { |
| 3318 | sys->policy = IPA_POLICY_INTR_POLL_MODE; |
| 3319 | sys->sps_option = (SPS_O_AUTO_ENABLE | SPS_O_EOT | |
| 3320 | SPS_O_ACK_TRANSFERS); |
| 3321 | sys->sps_callback = ipa_sps_irq_tx_notify; |
| 3322 | INIT_WORK(&sys->work, ipa_wq_handle_tx); |
| 3323 | INIT_DELAYED_WORK(&sys->switch_to_intr_work, |
| 3324 | switch_to_intr_tx_work_func); |
| 3325 | atomic_set(&sys->curr_polling_state, 0); |
| 3326 | } else if (in->client == IPA_CLIENT_APPS_LAN_CONS) { |
| 3327 | sys->policy = IPA_POLICY_INTR_POLL_MODE; |
| 3328 | sys->sps_option = (SPS_O_AUTO_ENABLE | SPS_O_EOT | |
| 3329 | SPS_O_ACK_TRANSFERS); |
| 3330 | sys->sps_callback = ipa_sps_irq_rx_notify; |
| 3331 | INIT_WORK(&sys->work, ipa_wq_handle_rx); |
| 3332 | INIT_DELAYED_WORK(&sys->switch_to_intr_work, |
| 3333 | switch_to_intr_rx_work_func); |
| 3334 | INIT_DELAYED_WORK(&sys->replenish_rx_work, |
| 3335 | replenish_rx_work_func); |
| 3336 | atomic_set(&sys->curr_polling_state, 0); |
| 3337 | sys->rx_buff_sz = IPA_RX_SKB_SIZE; |
| 3338 | sys->rx_pool_sz = IPA_RX_POOL_CEIL; |
| 3339 | sys->pyld_hdlr = ipa_rx_pyld_hdlr; |
| 3340 | sys->get_skb = ipa_get_skb_ipa_rx; |
| 3341 | sys->free_skb = ipa_free_skb_rx; |
| 3342 | sys->repl_hdlr = ipa_replenish_rx_cache; |
| 3343 | } else if (IPA_CLIENT_IS_PROD(in->client)) { |
| 3344 | sys->policy = IPA_POLICY_INTR_MODE; |
| 3345 | sys->sps_option = (SPS_O_AUTO_ENABLE | SPS_O_EOT); |
| 3346 | sys->sps_callback = ipa_sps_irq_tx_no_aggr_notify; |
| 3347 | } else { |
| 3348 | IPAERR("Need to install a RX pipe hdlr\n"); |
| 3349 | WARN_ON(1); |
| 3350 | return -EINVAL; |
| 3351 | } |
| 3352 | |
| 3353 | return 0; |
| 3354 | } else if (ipa_ctx->ipa_hw_type >= IPA_HW_v2_0) |
| 3355 | return ipa_assign_policy_v2(in, sys); |
| 3356 | |
| 3357 | IPAERR("Unsupported HW type %d\n", ipa_ctx->ipa_hw_type); |
| 3358 | WARN_ON(1); |
| 3359 | return -EINVAL; |
| 3360 | } |
| 3361 | |
| 3362 | /** |
| 3363 | * ipa_tx_client_rx_notify_release() - Callback function |
| 3364 | * which will call the user supplied callback function to |
| 3365 | * release the skb, or release it on its own if no callback |
| 3366 | * function was supplied |
| 3367 | * |
| 3368 | * @user1: [in] - Data Descriptor |
| 3369 | * @user2: [in] - endpoint idx |
| 3370 | * |
| 3371 | * This notified callback is for the destination client |
| 3372 | * This function is supplied in ipa_tx_dp_mul |
| 3373 | */ |
| 3374 | static void ipa_tx_client_rx_notify_release(void *user1, int user2) |
| 3375 | { |
| 3376 | struct ipa_tx_data_desc *dd = (struct ipa_tx_data_desc *)user1; |
| 3377 | int ep_idx = user2; |
| 3378 | |
| 3379 | IPADBG("Received data desc anchor:%p\n", dd); |
| 3380 | |
| 3381 | atomic_inc(&ipa_ctx->ep[ep_idx].avail_fifo_desc); |
| 3382 | ipa_ctx->ep[ep_idx].wstats.rx_pkts_status_rcvd++; |
| 3383 | |
| 3384 | /* wlan host driver waits till tx complete before unload */ |
| 3385 | IPADBG("ep=%d fifo_desc_free_count=%d\n", |
| 3386 | ep_idx, atomic_read(&ipa_ctx->ep[ep_idx].avail_fifo_desc)); |
| 3387 | IPADBG("calling client notify callback with priv:%p\n", |
| 3388 | ipa_ctx->ep[ep_idx].priv); |
| 3389 | |
| 3390 | if (ipa_ctx->ep[ep_idx].client_notify) { |
| 3391 | ipa_ctx->ep[ep_idx].client_notify(ipa_ctx->ep[ep_idx].priv, |
| 3392 | IPA_WRITE_DONE, (unsigned long)user1); |
| 3393 | ipa_ctx->ep[ep_idx].wstats.rx_hd_reply++; |
| 3394 | } |
| 3395 | } |
| 3396 | /** |
| 3397 | * ipa_tx_client_rx_pkt_status() - Callback function |
| 3398 | * which will call the user supplied callback function to |
| 3399 | * increase the available fifo descriptor |
| 3400 | * |
| 3401 | * @user1: [in] - Data Descriptor |
| 3402 | * @user2: [in] - endpoint idx |
| 3403 | * |
| 3404 | * This notified callback is for the destination client |
| 3405 | * This function is supplied in ipa_tx_dp_mul |
| 3406 | */ |
| 3407 | static void ipa_tx_client_rx_pkt_status(void *user1, int user2) |
| 3408 | { |
| 3409 | int ep_idx = user2; |
| 3410 | |
| 3411 | atomic_inc(&ipa_ctx->ep[ep_idx].avail_fifo_desc); |
| 3412 | ipa_ctx->ep[ep_idx].wstats.rx_pkts_status_rcvd++; |
| 3413 | } |
| 3414 | |
| 3415 | |
| 3416 | /** |
| 3417 | * ipa2_tx_dp_mul() - Data-path tx handler for multiple packets |
| 3418 | * @src: [in] - Client that is sending data |
| 3419 | * @ipa_tx_data_desc: [in] data descriptors from wlan |
| 3420 | * |
| 3421 | * this is used for to transfer data descriptors that received |
| 3422 | * from WLAN1_PROD pipe to IPA HW |
| 3423 | * |
| 3424 | * The function will send data descriptors from WLAN1_PROD (one |
| 3425 | * at a time) using sps_transfer_one. Will set EOT flag for last |
| 3426 | * descriptor Once this send was done from SPS point-of-view the |
| 3427 | * IPA driver will get notified by the supplied callback - |
| 3428 | * ipa_sps_irq_tx_no_aggr_notify() |
| 3429 | * |
| 3430 | * ipa_sps_irq_tx_no_aggr_notify will call to the user supplied |
| 3431 | * callback (from ipa_connect) |
| 3432 | * |
| 3433 | * Returns: 0 on success, negative on failure |
| 3434 | */ |
| 3435 | int ipa2_tx_dp_mul(enum ipa_client_type src, |
| 3436 | struct ipa_tx_data_desc *data_desc) |
| 3437 | { |
| 3438 | /* The second byte in wlan header holds qmap id */ |
| 3439 | #define IPA_WLAN_HDR_QMAP_ID_OFFSET 1 |
| 3440 | struct ipa_tx_data_desc *entry; |
| 3441 | struct ipa_sys_context *sys; |
| 3442 | struct ipa_desc desc = { 0 }; |
| 3443 | u32 num_desc, cnt; |
| 3444 | int ep_idx; |
| 3445 | |
| 3446 | if (unlikely(!ipa_ctx)) { |
| 3447 | IPAERR("IPA driver was not initialized\n"); |
| 3448 | return -EINVAL; |
| 3449 | } |
| 3450 | |
| 3451 | IPADBG("Received data desc anchor:%p\n", data_desc); |
| 3452 | |
| 3453 | spin_lock_bh(&ipa_ctx->wc_memb.ipa_tx_mul_spinlock); |
| 3454 | |
| 3455 | ep_idx = ipa2_get_ep_mapping(src); |
| 3456 | if (unlikely(ep_idx == -1)) { |
| 3457 | IPAERR("dest EP does not exist.\n"); |
| 3458 | goto fail_send; |
| 3459 | } |
| 3460 | IPADBG("ep idx:%d\n", ep_idx); |
| 3461 | sys = ipa_ctx->ep[ep_idx].sys; |
| 3462 | |
| 3463 | if (unlikely(ipa_ctx->ep[ep_idx].valid == 0)) { |
| 3464 | IPAERR("dest EP not valid.\n"); |
| 3465 | goto fail_send; |
| 3466 | } |
| 3467 | sys->ep->wstats.rx_hd_rcvd++; |
| 3468 | |
| 3469 | /* Calculate the number of descriptors */ |
| 3470 | num_desc = 0; |
| 3471 | list_for_each_entry(entry, &data_desc->link, link) { |
| 3472 | num_desc++; |
| 3473 | } |
| 3474 | IPADBG("Number of Data Descriptors:%d", num_desc); |
| 3475 | |
| 3476 | if (atomic_read(&sys->ep->avail_fifo_desc) < num_desc) { |
| 3477 | IPAERR("Insufficient data descriptors available\n"); |
| 3478 | goto fail_send; |
| 3479 | } |
| 3480 | |
| 3481 | /* Assign callback only for last data descriptor */ |
| 3482 | cnt = 0; |
| 3483 | list_for_each_entry(entry, &data_desc->link, link) { |
| 3484 | IPADBG("Parsing data desc :%d\n", cnt); |
| 3485 | cnt++; |
| 3486 | ((u8 *)entry->pyld_buffer)[IPA_WLAN_HDR_QMAP_ID_OFFSET] = |
| 3487 | (u8)sys->ep->cfg.meta.qmap_id; |
| 3488 | desc.pyld = entry->pyld_buffer; |
| 3489 | desc.len = entry->pyld_len; |
| 3490 | desc.type = IPA_DATA_DESC_SKB; |
| 3491 | desc.user1 = data_desc; |
| 3492 | desc.user2 = ep_idx; |
| 3493 | IPADBG("priv:%p pyld_buf:0x%p pyld_len:%d\n", |
| 3494 | entry->priv, desc.pyld, desc.len); |
| 3495 | |
| 3496 | /* In case of last descriptor populate callback */ |
| 3497 | if (cnt == num_desc) { |
| 3498 | IPADBG("data desc:%p\n", data_desc); |
| 3499 | desc.callback = ipa_tx_client_rx_notify_release; |
| 3500 | } else { |
| 3501 | desc.callback = ipa_tx_client_rx_pkt_status; |
| 3502 | } |
| 3503 | |
| 3504 | IPADBG("calling ipa_send_one()\n"); |
| 3505 | if (ipa_send_one(sys, &desc, true)) { |
| 3506 | IPAERR("fail to send skb\n"); |
| 3507 | sys->ep->wstats.rx_pkt_leak += (cnt-1); |
| 3508 | sys->ep->wstats.rx_dp_fail++; |
| 3509 | goto fail_send; |
| 3510 | } |
| 3511 | |
| 3512 | if (atomic_read(&sys->ep->avail_fifo_desc) >= 0) |
| 3513 | atomic_dec(&sys->ep->avail_fifo_desc); |
| 3514 | |
| 3515 | sys->ep->wstats.rx_pkts_rcvd++; |
| 3516 | IPADBG("ep=%d fifo desc=%d\n", |
| 3517 | ep_idx, atomic_read(&sys->ep->avail_fifo_desc)); |
| 3518 | } |
| 3519 | |
| 3520 | sys->ep->wstats.rx_hd_processed++; |
| 3521 | spin_unlock_bh(&ipa_ctx->wc_memb.ipa_tx_mul_spinlock); |
| 3522 | return 0; |
| 3523 | |
| 3524 | fail_send: |
| 3525 | spin_unlock_bh(&ipa_ctx->wc_memb.ipa_tx_mul_spinlock); |
| 3526 | return -EFAULT; |
| 3527 | |
| 3528 | } |
| 3529 | |
| 3530 | void ipa2_free_skb(struct ipa_rx_data *data) |
| 3531 | { |
| 3532 | struct ipa_rx_pkt_wrapper *rx_pkt; |
| 3533 | |
| 3534 | if (unlikely(!ipa_ctx)) { |
| 3535 | IPAERR("IPA driver was not initialized\n"); |
| 3536 | return; |
| 3537 | } |
| 3538 | |
| 3539 | spin_lock_bh(&ipa_ctx->wc_memb.wlan_spinlock); |
| 3540 | |
| 3541 | ipa_ctx->wc_memb.total_tx_pkts_freed++; |
| 3542 | rx_pkt = container_of(data, struct ipa_rx_pkt_wrapper, data); |
| 3543 | |
| 3544 | ipa_skb_recycle(rx_pkt->data.skb); |
| 3545 | (void)skb_put(rx_pkt->data.skb, IPA_WLAN_RX_BUFF_SZ); |
| 3546 | |
| 3547 | list_add_tail(&rx_pkt->link, |
| 3548 | &ipa_ctx->wc_memb.wlan_comm_desc_list); |
| 3549 | ipa_ctx->wc_memb.wlan_comm_free_cnt++; |
| 3550 | |
| 3551 | spin_unlock_bh(&ipa_ctx->wc_memb.wlan_spinlock); |
| 3552 | } |
| 3553 | |
| 3554 | |
| 3555 | /* Functions added to support kernel tests */ |
| 3556 | |
| 3557 | int ipa2_sys_setup(struct ipa_sys_connect_params *sys_in, |
| 3558 | unsigned long *ipa_bam_hdl, |
| 3559 | u32 *ipa_pipe_num, u32 *clnt_hdl, bool en_status) |
| 3560 | { |
| 3561 | struct ipa_ep_context *ep; |
| 3562 | int ipa_ep_idx; |
| 3563 | int result = -EINVAL; |
| 3564 | |
| 3565 | if (sys_in == NULL || clnt_hdl == NULL) { |
| 3566 | IPAERR("NULL args\n"); |
| 3567 | goto fail_gen; |
| 3568 | } |
| 3569 | |
| 3570 | if (ipa_bam_hdl == NULL || ipa_pipe_num == NULL) { |
| 3571 | IPAERR("NULL args\n"); |
| 3572 | goto fail_gen; |
| 3573 | } |
| 3574 | if (sys_in->client >= IPA_CLIENT_MAX) { |
| 3575 | IPAERR("bad parm client:%d\n", sys_in->client); |
| 3576 | goto fail_gen; |
| 3577 | } |
| 3578 | |
| 3579 | ipa_ep_idx = ipa2_get_ep_mapping(sys_in->client); |
| 3580 | if (ipa_ep_idx == -1) { |
| 3581 | IPAERR("Invalid client :%d\n", sys_in->client); |
| 3582 | goto fail_gen; |
| 3583 | } |
| 3584 | |
| 3585 | ep = &ipa_ctx->ep[ipa_ep_idx]; |
| 3586 | |
| 3587 | IPA_ACTIVE_CLIENTS_INC_EP(sys_in->client); |
| 3588 | |
| 3589 | if (ep->valid == 1) { |
| 3590 | if (sys_in->client != IPA_CLIENT_APPS_LAN_WAN_PROD) { |
| 3591 | IPAERR("EP %d already allocated\n", ipa_ep_idx); |
| 3592 | goto fail_and_disable_clocks; |
| 3593 | } else { |
| 3594 | if (ipa2_cfg_ep_hdr(ipa_ep_idx, |
| 3595 | &sys_in->ipa_ep_cfg.hdr)) { |
| 3596 | IPAERR("fail to configure hdr prop of EP %d\n", |
| 3597 | ipa_ep_idx); |
| 3598 | result = -EFAULT; |
| 3599 | goto fail_and_disable_clocks; |
| 3600 | } |
| 3601 | if (ipa2_cfg_ep_cfg(ipa_ep_idx, |
| 3602 | &sys_in->ipa_ep_cfg.cfg)) { |
| 3603 | IPAERR("fail to configure cfg prop of EP %d\n", |
| 3604 | ipa_ep_idx); |
| 3605 | result = -EFAULT; |
| 3606 | goto fail_and_disable_clocks; |
| 3607 | } |
| 3608 | IPAERR("client %d (ep: %d) overlay ok sys=%p\n", |
| 3609 | sys_in->client, ipa_ep_idx, ep->sys); |
| 3610 | ep->client_notify = sys_in->notify; |
| 3611 | ep->priv = sys_in->priv; |
| 3612 | *clnt_hdl = ipa_ep_idx; |
| 3613 | if (!ep->keep_ipa_awake) |
| 3614 | IPA_ACTIVE_CLIENTS_DEC_EP(sys_in->client); |
| 3615 | |
| 3616 | return 0; |
| 3617 | } |
| 3618 | } |
| 3619 | |
| 3620 | memset(ep, 0, offsetof(struct ipa_ep_context, sys)); |
| 3621 | |
| 3622 | ep->valid = 1; |
| 3623 | ep->client = sys_in->client; |
| 3624 | ep->client_notify = sys_in->notify; |
| 3625 | ep->priv = sys_in->priv; |
| 3626 | ep->keep_ipa_awake = true; |
| 3627 | |
| 3628 | result = ipa_enable_data_path(ipa_ep_idx); |
| 3629 | if (result) { |
| 3630 | IPAERR("enable data path failed res=%d clnt=%d.\n", |
| 3631 | result, ipa_ep_idx); |
| 3632 | goto fail_gen2; |
| 3633 | } |
| 3634 | |
| 3635 | if (!ep->skip_ep_cfg) { |
| 3636 | if (ipa2_cfg_ep(ipa_ep_idx, &sys_in->ipa_ep_cfg)) { |
| 3637 | IPAERR("fail to configure EP.\n"); |
| 3638 | goto fail_gen2; |
| 3639 | } |
| 3640 | if (ipa2_cfg_ep_status(ipa_ep_idx, &ep->status)) { |
| 3641 | IPAERR("fail to configure status of EP.\n"); |
| 3642 | goto fail_gen2; |
| 3643 | } |
| 3644 | IPADBG("ep configuration successful\n"); |
| 3645 | } else { |
| 3646 | IPADBG("skipping ep configuration\n"); |
| 3647 | } |
| 3648 | |
| 3649 | *clnt_hdl = ipa_ep_idx; |
| 3650 | |
| 3651 | *ipa_pipe_num = ipa_ep_idx; |
| 3652 | *ipa_bam_hdl = ipa_ctx->bam_handle; |
| 3653 | |
| 3654 | if (!ep->keep_ipa_awake) |
| 3655 | IPA_ACTIVE_CLIENTS_DEC_EP(sys_in->client); |
| 3656 | |
| 3657 | ipa_ctx->skip_ep_cfg_shadow[ipa_ep_idx] = ep->skip_ep_cfg; |
| 3658 | IPADBG("client %d (ep: %d) connected sys=%p\n", sys_in->client, |
| 3659 | ipa_ep_idx, ep->sys); |
| 3660 | |
| 3661 | return 0; |
| 3662 | |
| 3663 | fail_gen2: |
| 3664 | fail_and_disable_clocks: |
| 3665 | IPA_ACTIVE_CLIENTS_DEC_EP(sys_in->client); |
| 3666 | fail_gen: |
| 3667 | return result; |
| 3668 | } |
| 3669 | |
| 3670 | int ipa2_sys_teardown(u32 clnt_hdl) |
| 3671 | { |
| 3672 | struct ipa_ep_context *ep; |
| 3673 | |
| 3674 | if (clnt_hdl >= ipa_ctx->ipa_num_pipes || |
| 3675 | ipa_ctx->ep[clnt_hdl].valid == 0) { |
| 3676 | IPAERR("bad parm(Either endpoint or client hdl invalid)\n"); |
| 3677 | return -EINVAL; |
| 3678 | } |
| 3679 | |
| 3680 | ep = &ipa_ctx->ep[clnt_hdl]; |
| 3681 | |
| 3682 | if (!ep->keep_ipa_awake) |
| 3683 | IPA_ACTIVE_CLIENTS_INC_EP(ipa2_get_client_mapping(clnt_hdl)); |
| 3684 | |
| 3685 | ipa_disable_data_path(clnt_hdl); |
| 3686 | ep->valid = 0; |
| 3687 | |
| 3688 | IPA_ACTIVE_CLIENTS_DEC_EP(ipa2_get_client_mapping(clnt_hdl)); |
| 3689 | |
| 3690 | IPADBG("client (ep: %d) disconnected\n", clnt_hdl); |
| 3691 | |
| 3692 | return 0; |
| 3693 | } |
| 3694 | |
| 3695 | int ipa2_sys_update_gsi_hdls(u32 clnt_hdl, unsigned long gsi_ch_hdl, |
| 3696 | unsigned long gsi_ev_hdl) |
| 3697 | { |
| 3698 | IPAERR("GSI not supported in IPAv2"); |
| 3699 | return -EFAULT; |
| 3700 | } |
| 3701 | |
| 3702 | |
| 3703 | /** |
| 3704 | * ipa_adjust_ra_buff_base_sz() |
| 3705 | * |
| 3706 | * Return value: the largest power of two which is smaller |
| 3707 | * than the input value |
| 3708 | */ |
| 3709 | static u32 ipa_adjust_ra_buff_base_sz(u32 aggr_byte_limit) |
| 3710 | { |
| 3711 | aggr_byte_limit += IPA_MTU; |
| 3712 | aggr_byte_limit += IPA_GENERIC_RX_BUFF_LIMIT; |
| 3713 | aggr_byte_limit--; |
| 3714 | aggr_byte_limit |= aggr_byte_limit >> 1; |
| 3715 | aggr_byte_limit |= aggr_byte_limit >> 2; |
| 3716 | aggr_byte_limit |= aggr_byte_limit >> 4; |
| 3717 | aggr_byte_limit |= aggr_byte_limit >> 8; |
| 3718 | aggr_byte_limit |= aggr_byte_limit >> 16; |
| 3719 | aggr_byte_limit++; |
| 3720 | return aggr_byte_limit >> 1; |
| 3721 | } |