Nitesh Gupta | dd7321f | 2020-02-18 15:06:12 +0530 | [diff] [blame] | 1 | /* Copyright (c) 2015-2020, The Linux Foundation. All rights reserved. |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [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/module.h> |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/of.h> |
| 16 | #include <linux/err.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/slab.h> |
| 19 | #include <linux/delay.h> |
| 20 | #include <linux/mutex.h> |
| 21 | #include <linux/types.h> |
| 22 | #include <linux/io.h> |
| 23 | #include <linux/of_irq.h> |
| 24 | #include <linux/interrupt.h> |
| 25 | #include <linux/workqueue.h> |
| 26 | #include <linux/completion.h> |
| 27 | #include <linux/platform_device.h> |
| 28 | #include <linux/msm_ep_pcie.h> |
| 29 | #include <linux/ipa_mhi.h> |
| 30 | #include <linux/vmalloc.h> |
Nitesh Gupta | dd7321f | 2020-02-18 15:06:12 +0530 | [diff] [blame] | 31 | #include <soc/qcom/boot_stats.h> |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 32 | |
| 33 | #include "mhi.h" |
| 34 | #include "mhi_hwio.h" |
| 35 | #include "mhi_sm.h" |
| 36 | |
| 37 | /* Wait time on the device for Host to set M0 state */ |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 38 | #define MHI_DEV_M0_MAX_CNT 30 |
| 39 | /* Wait time before suspend/resume is complete */ |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 40 | #define MHI_SUSPEND_MIN 100 |
| 41 | #define MHI_SUSPEND_TIMEOUT 600 |
Siddartha Mohanadoss | 1a1d8f0 | 2018-04-02 19:52:35 -0700 | [diff] [blame] | 42 | #define MHI_WAKEUP_TIMEOUT_CNT 20 |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 43 | #define MHI_MASK_CH_EV_LEN 32 |
| 44 | #define MHI_RING_CMD_ID 0 |
| 45 | #define MHI_RING_PRIMARY_EVT_ID 1 |
| 46 | #define MHI_1K_SIZE 0x1000 |
| 47 | /* Updated Specification for event start is NER - 2 and end - NER -1 */ |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 48 | #define MHI_HW_ACC_EVT_RING_END 1 |
| 49 | |
| 50 | #define MHI_HOST_REGION_NUM 2 |
| 51 | |
| 52 | #define MHI_MMIO_CTRL_INT_STATUS_A7_MSK 0x1 |
| 53 | #define MHI_MMIO_CTRL_CRDB_STATUS_MSK 0x2 |
| 54 | |
| 55 | #define HOST_ADDR(lsb, msb) ((lsb) | ((uint64_t)(msb) << 32)) |
| 56 | #define HOST_ADDR_LSB(addr) (addr & 0xFFFFFFFF) |
| 57 | #define HOST_ADDR_MSB(addr) ((addr >> 32) & 0xFFFFFFFF) |
| 58 | |
| 59 | #define MHI_IPC_LOG_PAGES (100) |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 60 | #define MHI_REGLEN 0x100 |
| 61 | #define MHI_INIT 0 |
| 62 | #define MHI_REINIT 1 |
| 63 | |
| 64 | #define TR_RING_ELEMENT_SZ sizeof(struct mhi_dev_transfer_ring_element) |
| 65 | #define RING_ELEMENT_TYPE_SZ sizeof(union mhi_dev_ring_element_type) |
| 66 | |
Siva Kumar Akkireddi | 0f82ea3 | 2019-11-11 14:56:01 +0530 | [diff] [blame] | 67 | #define MHI_DEV_CH_CLOSE_TIMEOUT_MIN 5000 |
| 68 | #define MHI_DEV_CH_CLOSE_TIMEOUT_MAX 5100 |
| 69 | #define MHI_DEV_CH_CLOSE_TIMEOUT_COUNT 30 |
| 70 | |
Siva Kumar Akkireddi | 4e38821 | 2019-02-05 19:53:19 +0530 | [diff] [blame] | 71 | uint32_t bhi_imgtxdb; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 72 | enum mhi_msg_level mhi_msg_lvl = MHI_MSG_ERROR; |
| 73 | enum mhi_msg_level mhi_ipc_msg_lvl = MHI_MSG_VERBOSE; |
| 74 | void *mhi_ipc_log; |
| 75 | |
| 76 | static struct mhi_dev *mhi_ctx; |
| 77 | static void mhi_hwc_cb(void *priv, enum ipa_mhi_event_type event, |
| 78 | unsigned long data); |
| 79 | static void mhi_ring_init_cb(void *user_data); |
Siddartha Mohanadoss | ba314f2 | 2018-03-19 15:43:50 -0700 | [diff] [blame] | 80 | static void mhi_update_state_info(uint32_t uevent_idx, enum mhi_ctrl_info info); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 81 | static int mhi_deinit(struct mhi_dev *mhi); |
| 82 | static void mhi_dev_resume_init_with_link_up(struct ep_pcie_notify *notify); |
| 83 | static int mhi_dev_pcie_notify_event; |
| 84 | static void mhi_dev_transfer_completion_cb(void *mreq); |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 85 | static int mhi_dev_alloc_evt_buf_evt_req(struct mhi_dev *mhi, |
| 86 | struct mhi_dev_channel *ch, struct mhi_dev_ring *evt_ring); |
Siddartha Mohanadoss | ba314f2 | 2018-03-19 15:43:50 -0700 | [diff] [blame] | 87 | static struct mhi_dev_uevent_info channel_state_info[MHI_MAX_CHANNELS]; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 88 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 89 | /* |
| 90 | * mhi_dev_ring_cache_completion_cb () - Call back function called |
| 91 | * by IPA driver when ring element cache is done |
| 92 | * |
| 93 | * @req : ring cache request |
| 94 | */ |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 95 | static void mhi_dev_ring_cache_completion_cb(void *req) |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 96 | { |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 97 | struct ring_cache_req *ring_req = req; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 98 | |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 99 | if (ring_req) |
| 100 | complete(ring_req->done); |
| 101 | else |
| 102 | mhi_log(MHI_MSG_ERROR, "ring cache req is NULL\n"); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 103 | } |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 104 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 105 | void mhi_dev_read_from_host(struct mhi_dev *mhi, struct mhi_addr *transfer) |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 106 | { |
| 107 | int rc = 0; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 108 | uint64_t bit_40 = ((u64) 1) << 40, host_addr_pa = 0, offset = 0; |
| 109 | struct ring_cache_req ring_req; |
| 110 | |
| 111 | DECLARE_COMPLETION(done); |
| 112 | |
| 113 | ring_req.done = &done; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 114 | |
| 115 | if (!mhi) { |
| 116 | pr_err("invalid MHI ctx\n"); |
| 117 | return; |
| 118 | } |
| 119 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 120 | if (mhi->config_iatu) { |
| 121 | offset = (uint64_t) transfer->host_pa - mhi->ctrl_base.host_pa; |
| 122 | /* Mapping the translated physical address on the device */ |
| 123 | host_addr_pa = (uint64_t) mhi->ctrl_base.device_pa + offset; |
| 124 | } else { |
| 125 | host_addr_pa = transfer->host_pa | bit_40; |
| 126 | } |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 127 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 128 | mhi_log(MHI_MSG_VERBOSE, |
| 129 | "device 0x%x <<-- host 0x%llx, size %d\n", |
| 130 | transfer->phy_addr, host_addr_pa, |
| 131 | (int) transfer->size); |
| 132 | rc = ipa_dma_async_memcpy((u64)transfer->phy_addr, host_addr_pa, |
| 133 | (int)transfer->size, |
| 134 | mhi_dev_ring_cache_completion_cb, &ring_req); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 135 | if (rc) |
| 136 | pr_err("error while reading from host:%d\n", rc); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 137 | |
| 138 | wait_for_completion(&done); |
| 139 | } |
| 140 | EXPORT_SYMBOL(mhi_dev_read_from_host); |
| 141 | |
| 142 | void mhi_dev_write_to_host(struct mhi_dev *mhi, struct mhi_addr *transfer, |
| 143 | struct event_req *ereq, enum mhi_dev_transfer_type tr_type) |
| 144 | { |
| 145 | int rc = 0; |
| 146 | uint64_t bit_40 = ((u64) 1) << 40, host_addr_pa = 0, offset = 0; |
| 147 | dma_addr_t dma; |
| 148 | |
| 149 | if (!mhi) { |
| 150 | pr_err("invalid MHI ctx\n"); |
| 151 | return; |
| 152 | } |
| 153 | if (mhi->config_iatu) { |
| 154 | offset = (uint64_t) transfer->host_pa - mhi->ctrl_base.host_pa; |
| 155 | /* Mapping the translated physical address on the device */ |
| 156 | host_addr_pa = (uint64_t) mhi->ctrl_base.device_pa + offset; |
| 157 | } else { |
| 158 | host_addr_pa = transfer->host_pa | bit_40; |
| 159 | } |
| 160 | |
| 161 | mhi_log(MHI_MSG_VERBOSE, |
| 162 | "device 0x%llx --> host 0x%llx, size %d\n", |
| 163 | (uint64_t) mhi->cache_dma_handle, host_addr_pa, |
| 164 | (int) transfer->size); |
| 165 | if (tr_type == MHI_DEV_DMA_ASYNC) { |
| 166 | dma = dma_map_single(&mhi->pdev->dev, |
| 167 | transfer->virt_addr, transfer->size, |
| 168 | DMA_TO_DEVICE); |
| 169 | if (ereq->event_type == SEND_EVENT_BUFFER) { |
| 170 | ereq->dma = dma; |
| 171 | ereq->dma_len = transfer->size; |
| 172 | } else if (ereq->event_type == SEND_EVENT_RD_OFFSET) { |
| 173 | ereq->event_rd_dma = dma; |
| 174 | } |
| 175 | rc = ipa_dma_async_memcpy(host_addr_pa, (uint64_t) dma, |
| 176 | (int)transfer->size, |
| 177 | ereq->client_cb, ereq); |
| 178 | if (rc) |
| 179 | pr_err("error while writing to host:%d\n", rc); |
| 180 | } else if (tr_type == MHI_DEV_DMA_SYNC) { |
| 181 | /* Copy the device content to a local device |
| 182 | * physical address. |
| 183 | */ |
| 184 | memcpy(mhi->dma_cache, transfer->virt_addr, |
| 185 | transfer->size); |
| 186 | rc = ipa_dma_sync_memcpy(host_addr_pa, |
| 187 | (u64) mhi->cache_dma_handle, |
| 188 | (int) transfer->size); |
| 189 | if (rc) |
| 190 | pr_err("error while writing to host:%d\n", rc); |
| 191 | } |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 192 | } |
| 193 | EXPORT_SYMBOL(mhi_dev_write_to_host); |
| 194 | |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 195 | /* |
| 196 | * mhi_dev_event_buf_completion_cb() - CB function called by IPA driver |
| 197 | * when transfer completion event buffer copy to host is done. |
| 198 | * |
| 199 | * @req - event_req structure |
| 200 | */ |
| 201 | static void mhi_dev_event_buf_completion_cb(void *req) |
| 202 | { |
| 203 | struct event_req *ereq = req; |
| 204 | |
| 205 | if (ereq) |
| 206 | dma_unmap_single(&mhi_ctx->pdev->dev, ereq->dma, |
| 207 | ereq->dma_len, DMA_TO_DEVICE); |
| 208 | else |
| 209 | mhi_log(MHI_MSG_ERROR, "event req is null\n"); |
| 210 | } |
| 211 | |
| 212 | /* |
| 213 | * mhi_dev_event_rd_offset_completion_cb() - CB function called by IPA driver |
| 214 | * when event ring rd_offset transfer is done. |
| 215 | * |
| 216 | * @req - event_req structure |
| 217 | */ |
| 218 | static void mhi_dev_event_rd_offset_completion_cb(void *req) |
| 219 | { |
| 220 | union mhi_dev_ring_ctx *ctx; |
| 221 | int rc; |
| 222 | struct event_req *ereq = req; |
| 223 | struct mhi_dev_channel *ch = ereq->context; |
| 224 | struct mhi_dev *mhi = ch->ring->mhi_dev; |
| 225 | unsigned long flags; |
| 226 | |
| 227 | if (ereq->event_rd_dma) |
| 228 | dma_unmap_single(&mhi_ctx->pdev->dev, ereq->event_rd_dma, |
| 229 | sizeof(uint64_t), DMA_TO_DEVICE); |
| 230 | /* rp update in host memory should be flushed before sending an MSI */ |
| 231 | wmb(); |
| 232 | ctx = (union mhi_dev_ring_ctx *)&mhi->ev_ctx_cache[ereq->event_ring]; |
| 233 | rc = ep_pcie_trigger_msi(mhi_ctx->phandle, ctx->ev.msivec); |
| 234 | if (rc) |
| 235 | pr_err("%s: error sending in msi\n", __func__); |
| 236 | |
| 237 | /* Add back the flushed events space to the event buffer */ |
| 238 | ch->evt_buf_wp = ereq->start + ereq->num_events; |
| 239 | if (ch->evt_buf_wp == ch->evt_buf_size) |
| 240 | ch->evt_buf_wp = 0; |
| 241 | /* Return the event req to the list */ |
| 242 | spin_lock_irqsave(&mhi->lock, flags); |
| 243 | if (ch->curr_ereq == NULL) |
| 244 | ch->curr_ereq = ereq; |
| 245 | else |
| 246 | list_add_tail(&ereq->list, &ch->event_req_buffers); |
| 247 | spin_unlock_irqrestore(&mhi->lock, flags); |
| 248 | } |
| 249 | |
| 250 | static int mhi_dev_send_multiple_tr_events(struct mhi_dev *mhi, int evnt_ring, |
| 251 | struct event_req *ereq, uint32_t evt_len) |
| 252 | { |
| 253 | int rc = 0; |
| 254 | uint64_t evnt_ring_idx = mhi->ev_ring_start + evnt_ring; |
| 255 | struct mhi_dev_ring *ring = &mhi->ring[evnt_ring_idx]; |
| 256 | union mhi_dev_ring_ctx *ctx; |
| 257 | struct mhi_addr transfer_addr; |
| 258 | struct mhi_dev_channel *ch; |
| 259 | |
| 260 | if (!ereq) { |
| 261 | pr_err("%s(): invalid event req\n", __func__); |
| 262 | return -EINVAL; |
| 263 | } |
| 264 | |
| 265 | if (evnt_ring_idx > mhi->cfg.event_rings) { |
| 266 | pr_err("Invalid event ring idx: %lld\n", evnt_ring_idx); |
| 267 | return -EINVAL; |
| 268 | } |
| 269 | |
| 270 | if (mhi_ring_get_state(ring) == RING_STATE_UINT) { |
| 271 | ctx = (union mhi_dev_ring_ctx *)&mhi->ev_ctx_cache[evnt_ring]; |
| 272 | rc = mhi_ring_start(ring, ctx, mhi); |
| 273 | if (rc) { |
| 274 | mhi_log(MHI_MSG_ERROR, |
| 275 | "error starting event ring %d\n", evnt_ring); |
| 276 | return rc; |
| 277 | } |
| 278 | } |
| 279 | ch = ereq->context; |
| 280 | /* Check the limits of the buffer to be flushed */ |
| 281 | if (ereq->tr_events < ch->tr_events || |
| 282 | (ereq->tr_events + ereq->num_events) > |
| 283 | (ch->tr_events + ch->evt_buf_size)) { |
| 284 | pr_err("%s: Invalid completion event buffer!\n", __func__); |
| 285 | mhi_log(MHI_MSG_ERROR, |
| 286 | "Invalid cmpl evt buf - start %pK, end %pK\n", |
| 287 | ereq->tr_events, ereq->tr_events + ereq->num_events); |
| 288 | return -EINVAL; |
| 289 | } |
| 290 | |
| 291 | mhi_log(MHI_MSG_VERBOSE, "Flushing %d cmpl events of ch %d\n", |
| 292 | ereq->num_events, ch->ch_id); |
| 293 | /* add the events */ |
| 294 | ereq->client_cb = mhi_dev_event_buf_completion_cb; |
| 295 | ereq->event_type = SEND_EVENT_BUFFER; |
| 296 | rc = mhi_dev_add_element(ring, ereq->tr_events, ereq, evt_len); |
| 297 | if (rc) { |
| 298 | pr_err("%s(): error in adding element rc %d\n", __func__, rc); |
| 299 | return rc; |
| 300 | } |
| 301 | ring->ring_ctx_shadow->ev.rp = (ring->rd_offset * |
| 302 | sizeof(union mhi_dev_ring_element_type)) + |
| 303 | ring->ring_ctx->generic.rbase; |
| 304 | |
| 305 | mhi_log(MHI_MSG_VERBOSE, "ev.rp = %llx for %lld\n", |
| 306 | ring->ring_ctx_shadow->ev.rp, evnt_ring_idx); |
| 307 | |
| 308 | if (mhi->use_ipa) { |
| 309 | transfer_addr.host_pa = (mhi->ev_ctx_shadow.host_pa + |
| 310 | sizeof(struct mhi_dev_ev_ctx) * |
| 311 | evnt_ring) + (size_t)&ring->ring_ctx->ev.rp - |
| 312 | (size_t)ring->ring_ctx; |
| 313 | /* |
| 314 | * As ev_ctx_cache memory is dma_alloc_coherent, dma_map_single |
| 315 | * should not be called. Pass physical address to write to host. |
| 316 | */ |
| 317 | transfer_addr.phy_addr = (mhi->ev_ctx_cache_dma_handle + |
| 318 | sizeof(struct mhi_dev_ev_ctx) * evnt_ring) + |
| 319 | (size_t)&ring->ring_ctx->ev.rp - |
| 320 | (size_t)ring->ring_ctx; |
| 321 | } else { |
| 322 | transfer_addr.device_va = (mhi->ev_ctx_shadow.device_va + |
| 323 | sizeof(struct mhi_dev_ev_ctx) * |
| 324 | evnt_ring) + (size_t)&ring->ring_ctx->ev.rp - |
| 325 | (size_t)ring->ring_ctx; |
| 326 | } |
| 327 | |
| 328 | transfer_addr.virt_addr = &ring->ring_ctx_shadow->ev.rp; |
| 329 | transfer_addr.size = sizeof(uint64_t); |
| 330 | ereq->event_type = SEND_EVENT_RD_OFFSET; |
| 331 | ereq->client_cb = mhi_dev_event_rd_offset_completion_cb; |
| 332 | ereq->event_ring = evnt_ring; |
| 333 | mhi_dev_write_to_host(mhi, &transfer_addr, ereq, MHI_DEV_DMA_ASYNC); |
| 334 | return rc; |
| 335 | } |
| 336 | |
| 337 | static int mhi_dev_flush_transfer_completion_events(struct mhi_dev *mhi, |
| 338 | struct mhi_dev_channel *ch) |
| 339 | { |
| 340 | int rc = 0; |
| 341 | unsigned long flags; |
| 342 | struct event_req *flush_ereq; |
| 343 | |
| 344 | /* |
| 345 | * Channel got closed with transfers pending |
| 346 | * Do not send completion events to host |
| 347 | */ |
| 348 | if (ch->state == MHI_DEV_CH_CLOSED) { |
| 349 | mhi_log(MHI_MSG_DBG, "Ch %d closed with %d writes pending\n", |
| 350 | ch->ch_id, ch->pend_wr_count + 1); |
| 351 | return -ENODEV; |
| 352 | } |
| 353 | |
| 354 | do { |
| 355 | spin_lock_irqsave(&mhi->lock, flags); |
| 356 | if (list_empty(&ch->flush_event_req_buffers)) { |
| 357 | spin_unlock_irqrestore(&mhi->lock, flags); |
| 358 | break; |
| 359 | } |
| 360 | flush_ereq = container_of(ch->flush_event_req_buffers.next, |
| 361 | struct event_req, list); |
| 362 | list_del_init(&flush_ereq->list); |
| 363 | spin_unlock_irqrestore(&mhi->lock, flags); |
| 364 | |
| 365 | mhi_log(MHI_MSG_DBG, "Flush called for ch %d\n", ch->ch_id); |
| 366 | rc = mhi_dev_send_multiple_tr_events(mhi, |
| 367 | mhi->ch_ctx_cache[ch->ch_id].err_indx, |
| 368 | flush_ereq, |
| 369 | (flush_ereq->num_events * |
| 370 | sizeof(union mhi_dev_ring_element_type))); |
| 371 | if (rc) { |
| 372 | mhi_log(MHI_MSG_ERROR, "failed to send compl evts\n"); |
| 373 | break; |
| 374 | } |
| 375 | } while (true); |
| 376 | |
| 377 | return rc; |
| 378 | } |
| 379 | |
| 380 | static bool mhi_dev_is_full_compl_evt_buf(struct mhi_dev_channel *ch) |
| 381 | { |
| 382 | if (((ch->evt_buf_rp + 1) % ch->evt_buf_size) == ch->evt_buf_wp) |
| 383 | return true; |
| 384 | |
| 385 | return false; |
| 386 | } |
| 387 | |
| 388 | static void mhi_dev_rollback_compl_evt(struct mhi_dev_channel *ch) |
| 389 | { |
| 390 | if (ch->evt_buf_rp) |
| 391 | ch->evt_buf_rp--; |
| 392 | else |
| 393 | ch->evt_buf_rp = ch->evt_buf_size - 1; |
| 394 | } |
| 395 | |
| 396 | /* |
| 397 | * mhi_dev_queue_transfer_completion() - Queues a transfer completion |
| 398 | * event to the event buffer (where events are stored until they get |
| 399 | * flushed to host). Also determines when the completion events are |
| 400 | * to be flushed (sent) to host. |
| 401 | * |
| 402 | * @req - event_req structure |
| 403 | * @flush - Set to true when completion events are to be flushed. |
| 404 | */ |
| 405 | |
| 406 | static int mhi_dev_queue_transfer_completion(struct mhi_req *mreq, bool *flush) |
| 407 | { |
| 408 | union mhi_dev_ring_element_type *compl_ev; |
| 409 | struct mhi_dev_channel *ch = mreq->client->channel; |
| 410 | unsigned long flags; |
| 411 | |
| 412 | if (mhi_dev_is_full_compl_evt_buf(ch) || ch->curr_ereq == NULL) { |
| 413 | mhi_log(MHI_MSG_VERBOSE, "Ran out of %s\n", |
| 414 | (ch->curr_ereq ? "compl evts" : "ereqs")); |
| 415 | return -EBUSY; |
| 416 | } |
| 417 | |
| 418 | if (mreq->el->tre.ieot) { |
| 419 | compl_ev = ch->tr_events + ch->evt_buf_rp; |
| 420 | compl_ev->evt_tr_comp.chid = ch->ch_id; |
| 421 | compl_ev->evt_tr_comp.type = |
| 422 | MHI_DEV_RING_EL_TRANSFER_COMPLETION_EVENT; |
| 423 | compl_ev->evt_tr_comp.len = mreq->transfer_len; |
| 424 | compl_ev->evt_tr_comp.code = MHI_CMD_COMPL_CODE_EOT; |
| 425 | compl_ev->evt_tr_comp.ptr = ch->ring->ring_ctx->generic.rbase + |
| 426 | mreq->rd_offset * TR_RING_ELEMENT_SZ; |
| 427 | ch->evt_buf_rp++; |
| 428 | if (ch->evt_buf_rp == ch->evt_buf_size) |
| 429 | ch->evt_buf_rp = 0; |
| 430 | ch->curr_ereq->num_events++; |
| 431 | /* |
| 432 | * It is not necessary to flush when we need to wrap-around, if |
| 433 | * we do have free space in the buffer upon wrap-around. |
| 434 | * But when we really need to flush, we need a separate dma op |
| 435 | * anyway for the current chunk (from flush_start to the |
| 436 | * physical buffer end) since the buffer is circular. So we |
| 437 | * might as well flush on wrap-around. |
| 438 | * Also, we flush when we hit the threshold as well. The flush |
| 439 | * threshold is based on the channel's event ring size. |
| 440 | * |
| 441 | * In summary, completion event buffer flush is done if |
| 442 | * * Client requests it (snd_cmpl was set to 1) OR |
| 443 | * * Physical end of the event buffer is reached OR |
| 444 | * * Flush threshold is reached for the current ereq |
| 445 | * |
| 446 | * When events are to be flushed, the current ereq is moved to |
| 447 | * the flush list, and the flush param is set to true for the |
| 448 | * second and third cases above. The actual flush of the events |
| 449 | * is done in the write_to_host API (for the write path) or |
| 450 | * in the transfer completion callback (for the read path). |
| 451 | */ |
| 452 | if (ch->evt_buf_rp == 0 || |
| 453 | ch->curr_ereq->num_events >= |
| 454 | MHI_CMPL_EVT_FLUSH_THRSHLD(ch->evt_buf_size) |
| 455 | || mreq->snd_cmpl) { |
| 456 | if (flush) |
| 457 | *flush = true; |
| 458 | |
| 459 | if (!mreq->snd_cmpl) |
| 460 | mreq->snd_cmpl = 1; |
| 461 | |
| 462 | ch->curr_ereq->tr_events = ch->tr_events + |
| 463 | ch->curr_ereq->start; |
| 464 | ch->curr_ereq->context = ch; |
| 465 | |
| 466 | /* Move current event req to flush list*/ |
| 467 | spin_lock_irqsave(&mhi_ctx->lock, flags); |
| 468 | list_add_tail(&ch->curr_ereq->list, |
| 469 | &ch->flush_event_req_buffers); |
| 470 | |
| 471 | if (!list_empty(&ch->event_req_buffers)) { |
| 472 | ch->curr_ereq = |
| 473 | container_of(ch->event_req_buffers.next, |
| 474 | struct event_req, list); |
| 475 | list_del_init(&ch->curr_ereq->list); |
| 476 | ch->curr_ereq->num_events = 0; |
| 477 | ch->curr_ereq->start = ch->evt_buf_rp; |
| 478 | } else { |
| 479 | pr_err("%s evt req buffers empty\n", __func__); |
| 480 | mhi_log(MHI_MSG_ERROR, |
| 481 | "evt req buffers empty\n"); |
| 482 | ch->curr_ereq = NULL; |
| 483 | } |
| 484 | spin_unlock_irqrestore(&mhi_ctx->lock, flags); |
| 485 | } |
| 486 | return 0; |
| 487 | } |
| 488 | |
| 489 | mhi_log(MHI_MSG_ERROR, "ieot is not valid\n"); |
| 490 | return -EINVAL; |
| 491 | } |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 492 | int mhi_transfer_host_to_device(void *dev, uint64_t host_pa, uint32_t len, |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 493 | struct mhi_dev *mhi, struct mhi_req *mreq) |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 494 | { |
| 495 | int rc = 0; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 496 | uint64_t bit_40 = ((u64) 1) << 40, host_addr_pa = 0, offset = 0; |
| 497 | struct mhi_dev_ring *ring = NULL; |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 498 | struct mhi_dev_channel *ch; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 499 | |
| 500 | if (!mhi || !dev || !host_pa || !mreq) { |
| 501 | pr_err("%s():Invalid parameters\n", __func__); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 502 | return -EINVAL; |
| 503 | } |
| 504 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 505 | if (mhi->config_iatu) { |
| 506 | offset = (uint64_t)host_pa - mhi->data_base.host_pa; |
| 507 | /* Mapping the translated physical address on the device */ |
| 508 | host_addr_pa = (uint64_t) mhi->data_base.device_pa + offset; |
| 509 | } else { |
| 510 | host_addr_pa = host_pa | bit_40; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 511 | } |
| 512 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 513 | mhi_log(MHI_MSG_VERBOSE, "device 0x%llx <-- host 0x%llx, size %d\n", |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 514 | (uint64_t) mhi->read_dma_handle, host_addr_pa, (int) len); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 515 | |
| 516 | if (mreq->mode == IPA_DMA_SYNC) { |
| 517 | rc = ipa_dma_sync_memcpy((u64) mhi->read_dma_handle, |
| 518 | host_addr_pa, (int) len); |
| 519 | if (rc) { |
| 520 | pr_err("error while reading chan using sync:%d\n", rc); |
| 521 | return rc; |
| 522 | } |
| 523 | memcpy(dev, mhi->read_handle, len); |
| 524 | } else if (mreq->mode == IPA_DMA_ASYNC) { |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 525 | ch = mreq->client->channel; |
| 526 | ring = ch->ring; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 527 | mreq->dma = dma_map_single(&mhi->pdev->dev, dev, len, |
| 528 | DMA_FROM_DEVICE); |
| 529 | mhi_dev_ring_inc_index(ring, ring->rd_offset); |
| 530 | |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 531 | if (ring->rd_offset == ring->wr_offset) { |
| 532 | mhi_log(MHI_MSG_VERBOSE, |
| 533 | "Setting snd_cmpl to 1 for ch %d\n", ch->ch_id); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 534 | mreq->snd_cmpl = 1; |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 535 | } |
| 536 | |
| 537 | /* Queue the completion event for the current transfer */ |
| 538 | rc = mhi_dev_queue_transfer_completion(mreq, NULL); |
| 539 | if (rc) { |
| 540 | mhi_log(MHI_MSG_ERROR, |
| 541 | "Failed to queue completion for ch %d, rc %d\n", |
| 542 | ch->ch_id, rc); |
| 543 | return rc; |
| 544 | } |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 545 | rc = ipa_dma_async_memcpy(mreq->dma, host_addr_pa, |
| 546 | (int) len, mhi_dev_transfer_completion_cb, |
| 547 | mreq); |
| 548 | if (rc) { |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 549 | mhi_log(MHI_MSG_ERROR, |
| 550 | "DMA read error %d for ch %d\n", rc, ch->ch_id); |
| 551 | /* Roll back the completion event that we wrote above */ |
| 552 | mhi_dev_rollback_compl_evt(ch); |
| 553 | /* Unmap the buffer */ |
| 554 | dma_unmap_single(&mhi_ctx->pdev->dev, mreq->dma, |
| 555 | len, DMA_FROM_DEVICE); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 556 | return rc; |
| 557 | } |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 558 | } |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 559 | return rc; |
| 560 | } |
| 561 | EXPORT_SYMBOL(mhi_transfer_host_to_device); |
| 562 | |
| 563 | int mhi_transfer_device_to_host(uint64_t host_addr, void *dev, uint32_t len, |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 564 | struct mhi_dev *mhi, struct mhi_req *req) |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 565 | { |
| 566 | int rc = 0; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 567 | uint64_t bit_40 = ((u64) 1) << 40, host_addr_pa = 0, offset = 0; |
| 568 | struct mhi_dev_ring *ring = NULL; |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 569 | bool flush = false; |
| 570 | struct mhi_dev_channel *ch; |
| 571 | u32 snd_cmpl; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 572 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 573 | if (!mhi || !dev || !req || !host_addr) { |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 574 | pr_err("%sInvalid parameters\n", __func__); |
| 575 | return -EINVAL; |
| 576 | } |
| 577 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 578 | if (mhi->config_iatu) { |
| 579 | offset = (uint64_t)host_addr - mhi->data_base.host_pa; |
| 580 | /* Mapping the translated physical address on the device */ |
| 581 | host_addr_pa = (uint64_t) mhi->data_base.device_pa + offset; |
| 582 | } else { |
| 583 | host_addr_pa = host_addr | bit_40; |
| 584 | } |
| 585 | mhi_log(MHI_MSG_VERBOSE, "device 0x%llx ---> host 0x%llx, size %d\n", |
| 586 | (uint64_t) mhi->write_dma_handle, |
| 587 | host_addr_pa, (int) len); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 588 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 589 | if (req->mode == IPA_DMA_SYNC) { |
| 590 | memcpy(mhi->write_handle, dev, len); |
| 591 | rc = ipa_dma_sync_memcpy(host_addr_pa, |
| 592 | (u64) mhi->write_dma_handle, (int) len); |
| 593 | } else if (req->mode == IPA_DMA_ASYNC) { |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 594 | ch = req->client->channel; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 595 | req->dma = dma_map_single(&mhi->pdev->dev, req->buf, |
| 596 | req->len, DMA_TO_DEVICE); |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 597 | |
| 598 | ring = ch->ring; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 599 | mhi_dev_ring_inc_index(ring, ring->rd_offset); |
| 600 | if (ring->rd_offset == ring->wr_offset) |
| 601 | req->snd_cmpl = 1; |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 602 | snd_cmpl = req->snd_cmpl; |
| 603 | |
| 604 | /* Queue the completion event for the current transfer */ |
| 605 | rc = mhi_dev_queue_transfer_completion(req, &flush); |
| 606 | if (rc) { |
| 607 | pr_err("Failed to queue completion: %d\n", rc); |
| 608 | return rc; |
| 609 | } |
| 610 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 611 | rc = ipa_dma_async_memcpy(host_addr_pa, |
| 612 | (uint64_t) req->dma, (int) len, |
| 613 | mhi_dev_transfer_completion_cb, req); |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 614 | if (rc) { |
| 615 | mhi_log(MHI_MSG_ERROR, "Error sending data to host\n"); |
| 616 | /* Roll back the completion event that we wrote above */ |
| 617 | mhi_dev_rollback_compl_evt(ch); |
| 618 | /* Unmap the buffer */ |
| 619 | dma_unmap_single(&mhi_ctx->pdev->dev, req->dma, |
| 620 | req->len, DMA_TO_DEVICE); |
| 621 | return rc; |
| 622 | } |
| 623 | if (snd_cmpl || flush) { |
| 624 | rc = mhi_dev_flush_transfer_completion_events(mhi, ch); |
| 625 | if (rc) { |
| 626 | mhi_log(MHI_MSG_ERROR, |
| 627 | "Failed to flush write completions to host\n"); |
| 628 | return rc; |
| 629 | } |
| 630 | } |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 631 | } |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 632 | return 0; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 633 | } |
| 634 | EXPORT_SYMBOL(mhi_transfer_device_to_host); |
| 635 | |
| 636 | int mhi_dev_is_list_empty(void) |
| 637 | { |
| 638 | |
| 639 | if (list_empty(&mhi_ctx->event_ring_list) && |
| 640 | list_empty(&mhi_ctx->process_ring_list)) |
| 641 | return 0; |
| 642 | else |
| 643 | return 1; |
| 644 | } |
| 645 | EXPORT_SYMBOL(mhi_dev_is_list_empty); |
| 646 | |
| 647 | static void mhi_dev_get_erdb_db_cfg(struct mhi_dev *mhi, |
| 648 | struct ep_pcie_db_config *erdb_cfg) |
| 649 | { |
| 650 | switch (mhi->cfg.event_rings) { |
| 651 | case NUM_CHANNELS: |
| 652 | erdb_cfg->base = HW_CHANNEL_BASE; |
| 653 | erdb_cfg->end = HW_CHANNEL_END; |
| 654 | break; |
| 655 | default: |
| 656 | erdb_cfg->base = mhi->cfg.event_rings - |
Rama Krishna Phani A | 1b235ff | 2019-06-25 15:13:48 +0530 | [diff] [blame] | 657 | (mhi->cfg.hw_event_rings); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 658 | erdb_cfg->end = mhi->cfg.event_rings - |
| 659 | MHI_HW_ACC_EVT_RING_END; |
| 660 | break; |
| 661 | } |
| 662 | } |
| 663 | |
| 664 | int mhi_pcie_config_db_routing(struct mhi_dev *mhi) |
| 665 | { |
| 666 | int rc = 0; |
| 667 | struct ep_pcie_db_config chdb_cfg, erdb_cfg; |
| 668 | |
| 669 | if (!mhi) { |
| 670 | pr_err("Invalid MHI context\n"); |
| 671 | return -EINVAL; |
| 672 | } |
| 673 | |
| 674 | /* Configure Doorbell routing */ |
| 675 | chdb_cfg.base = HW_CHANNEL_BASE; |
| 676 | chdb_cfg.end = HW_CHANNEL_END; |
| 677 | chdb_cfg.tgt_addr = (uint32_t) mhi->ipa_uc_mbox_crdb; |
| 678 | |
| 679 | mhi_dev_get_erdb_db_cfg(mhi, &erdb_cfg); |
| 680 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 681 | mhi_log(MHI_MSG_VERBOSE, |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 682 | "Event rings 0x%x => er_base 0x%x, er_end %d\n", |
| 683 | mhi->cfg.event_rings, erdb_cfg.base, erdb_cfg.end); |
| 684 | erdb_cfg.tgt_addr = (uint32_t) mhi->ipa_uc_mbox_erdb; |
| 685 | ep_pcie_config_db_routing(mhi_ctx->phandle, chdb_cfg, erdb_cfg); |
| 686 | |
| 687 | return rc; |
| 688 | } |
| 689 | EXPORT_SYMBOL(mhi_pcie_config_db_routing); |
| 690 | |
| 691 | static int mhi_hwc_init(struct mhi_dev *mhi) |
| 692 | { |
| 693 | int rc = 0; |
| 694 | struct ep_pcie_msi_config cfg; |
| 695 | struct ipa_mhi_init_params ipa_init_params; |
| 696 | struct ep_pcie_db_config erdb_cfg; |
| 697 | |
| 698 | /* Call IPA HW_ACC Init with MSI Address and db routing info */ |
| 699 | rc = ep_pcie_get_msi_config(mhi_ctx->phandle, &cfg); |
| 700 | if (rc) { |
| 701 | pr_err("Error retrieving pcie msi logic\n"); |
| 702 | return rc; |
| 703 | } |
| 704 | |
| 705 | rc = mhi_pcie_config_db_routing(mhi); |
| 706 | if (rc) { |
| 707 | pr_err("Error configuring DB routing\n"); |
| 708 | return rc; |
| 709 | } |
| 710 | |
| 711 | mhi_dev_get_erdb_db_cfg(mhi, &erdb_cfg); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 712 | mhi_log(MHI_MSG_VERBOSE, |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 713 | "Event rings 0x%x => er_base 0x%x, er_end %d\n", |
| 714 | mhi->cfg.event_rings, erdb_cfg.base, erdb_cfg.end); |
| 715 | |
| 716 | erdb_cfg.tgt_addr = (uint32_t) mhi->ipa_uc_mbox_erdb; |
| 717 | memset(&ipa_init_params, 0, sizeof(ipa_init_params)); |
| 718 | ipa_init_params.msi.addr_hi = cfg.upper; |
| 719 | ipa_init_params.msi.addr_low = cfg.lower; |
| 720 | ipa_init_params.msi.data = cfg.data; |
| 721 | ipa_init_params.msi.mask = ((1 << cfg.msg_num) - 1); |
| 722 | ipa_init_params.first_er_idx = erdb_cfg.base; |
| 723 | ipa_init_params.first_ch_idx = HW_CHANNEL_BASE; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 724 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 725 | if (mhi_ctx->config_iatu) |
| 726 | ipa_init_params.mmio_addr = |
| 727 | ((uint32_t) mhi_ctx->mmio_base_pa_addr) + MHI_REGLEN; |
| 728 | else |
| 729 | ipa_init_params.mmio_addr = |
| 730 | ((uint32_t) mhi_ctx->mmio_base_pa_addr); |
| 731 | |
| 732 | if (!mhi_ctx->config_iatu) |
| 733 | ipa_init_params.assert_bit40 = true; |
| 734 | |
| 735 | mhi_log(MHI_MSG_VERBOSE, |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 736 | "MMIO Addr 0x%x, MSI config: U:0x%x L: 0x%x D: 0x%x\n", |
| 737 | ipa_init_params.mmio_addr, cfg.upper, cfg.lower, cfg.data); |
| 738 | ipa_init_params.notify = mhi_hwc_cb; |
| 739 | ipa_init_params.priv = mhi; |
| 740 | |
| 741 | rc = ipa_mhi_init(&ipa_init_params); |
| 742 | if (rc) { |
| 743 | pr_err("Error initializing IPA\n"); |
| 744 | return rc; |
| 745 | } |
| 746 | |
| 747 | return rc; |
| 748 | } |
| 749 | |
| 750 | static int mhi_hwc_start(struct mhi_dev *mhi) |
| 751 | { |
| 752 | int rc = 0; |
| 753 | struct ipa_mhi_start_params ipa_start_params; |
| 754 | |
| 755 | memset(&ipa_start_params, 0, sizeof(ipa_start_params)); |
| 756 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 757 | if (mhi->config_iatu) { |
| 758 | ipa_start_params.host_ctrl_addr = mhi->ctrl_base.device_pa; |
| 759 | ipa_start_params.host_data_addr = mhi->data_base.device_pa; |
| 760 | } else { |
| 761 | ipa_start_params.channel_context_array_addr = |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 762 | mhi->ch_ctx_shadow.host_pa; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 763 | ipa_start_params.event_context_array_addr = |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 764 | mhi->ev_ctx_shadow.host_pa; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 765 | } |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 766 | |
| 767 | rc = ipa_mhi_start(&ipa_start_params); |
| 768 | if (rc) |
| 769 | pr_err("Error starting IPA (rc = 0x%X)\n", rc); |
| 770 | |
| 771 | return rc; |
| 772 | } |
| 773 | |
| 774 | static void mhi_hwc_cb(void *priv, enum ipa_mhi_event_type event, |
| 775 | unsigned long data) |
| 776 | { |
| 777 | int rc = 0; |
| 778 | |
| 779 | switch (event) { |
| 780 | case IPA_MHI_EVENT_READY: |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 781 | mhi_log(MHI_MSG_INFO, |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 782 | "HW Channel uC is ready event=0x%X\n", event); |
| 783 | rc = mhi_hwc_start(mhi_ctx); |
| 784 | if (rc) { |
| 785 | pr_err("hwc_init start failed with %d\n", rc); |
| 786 | return; |
| 787 | } |
| 788 | |
| 789 | rc = mhi_dev_mmio_enable_chdb_interrupts(mhi_ctx); |
| 790 | if (rc) { |
| 791 | pr_err("Failed to enable channel db\n"); |
| 792 | return; |
| 793 | } |
| 794 | |
| 795 | rc = mhi_dev_mmio_enable_ctrl_interrupt(mhi_ctx); |
| 796 | if (rc) { |
| 797 | pr_err("Failed to enable control interrupt\n"); |
| 798 | return; |
| 799 | } |
| 800 | |
| 801 | rc = mhi_dev_mmio_enable_cmdb_interrupt(mhi_ctx); |
| 802 | |
| 803 | if (rc) { |
| 804 | pr_err("Failed to enable command db\n"); |
| 805 | return; |
| 806 | } |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 807 | |
Siddartha Mohanadoss | ba314f2 | 2018-03-19 15:43:50 -0700 | [diff] [blame] | 808 | mhi_update_state_info(MHI_DEV_UEVENT_CTRL, MHI_STATE_CONNECTED); |
Nitesh Gupta | dd7321f | 2020-02-18 15:06:12 +0530 | [diff] [blame] | 809 | mhi_log(MHI_MSG_CRITICAL, "Device in M0 State\n"); |
| 810 | place_marker("MHI - Device in M0 State\n"); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 811 | |
Siva Kumar Akkireddi | dd7c6ed | 2018-09-07 15:04:17 +0530 | [diff] [blame] | 812 | if (!mhi_ctx->mhi_int) |
| 813 | ep_pcie_mask_irq_event(mhi_ctx->phandle, |
| 814 | EP_PCIE_INT_EVT_MHI_A7, true); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 815 | break; |
| 816 | case IPA_MHI_EVENT_DATA_AVAILABLE: |
| 817 | rc = mhi_dev_notify_sm_event(MHI_DEV_EVENT_HW_ACC_WAKEUP); |
| 818 | if (rc) { |
| 819 | pr_err("Event HW_ACC_WAKEUP failed with %d\n", rc); |
| 820 | return; |
| 821 | } |
| 822 | break; |
| 823 | default: |
| 824 | pr_err("HW Channel uC unknown event 0x%X\n", event); |
| 825 | break; |
| 826 | } |
| 827 | } |
| 828 | |
| 829 | static int mhi_hwc_chcmd(struct mhi_dev *mhi, uint chid, |
| 830 | enum mhi_dev_ring_element_type_id type) |
| 831 | { |
| 832 | int rc = 0; |
| 833 | struct ipa_mhi_connect_params connect_params; |
| 834 | |
| 835 | memset(&connect_params, 0, sizeof(connect_params)); |
| 836 | |
| 837 | switch (type) { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 838 | case MHI_DEV_RING_EL_RESET: |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 839 | case MHI_DEV_RING_EL_STOP: |
Nitesh Gupta | 67c5c61 | 2020-04-30 23:28:38 +0530 | [diff] [blame] | 840 | if ((chid-HW_CHANNEL_BASE) > NUM_HW_CHANNELS) { |
| 841 | pr_err("Invalid Channel ID = 0x%X\n", chid); |
| 842 | return -EINVAL; |
| 843 | } |
| 844 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 845 | rc = ipa_mhi_disconnect_pipe( |
| 846 | mhi->ipa_clnt_hndl[chid-HW_CHANNEL_BASE]); |
| 847 | if (rc) |
| 848 | pr_err("Stopping HW Channel%d failed 0x%X\n", |
| 849 | chid, rc); |
| 850 | break; |
| 851 | case MHI_DEV_RING_EL_START: |
| 852 | connect_params.channel_id = chid; |
| 853 | connect_params.sys.skip_ep_cfg = true; |
Rama Krishna Phani A | 1b235ff | 2019-06-25 15:13:48 +0530 | [diff] [blame] | 854 | |
| 855 | switch (chid) { |
| 856 | case MHI_CLIENT_ADPL_IN: |
Siva Kumar Akkireddi | 859701c | 2018-10-03 17:35:30 +0530 | [diff] [blame] | 857 | connect_params.sys.client = IPA_CLIENT_MHI_DPL_CONS; |
Rama Krishna Phani A | 1b235ff | 2019-06-25 15:13:48 +0530 | [diff] [blame] | 858 | break; |
| 859 | case MHI_CLIENT_IP_HW_0_OUT: |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 860 | connect_params.sys.client = IPA_CLIENT_MHI_PROD; |
Rama Krishna Phani A | 1b235ff | 2019-06-25 15:13:48 +0530 | [diff] [blame] | 861 | break; |
| 862 | case MHI_CLIENT_IP_HW_0_IN: |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 863 | connect_params.sys.client = IPA_CLIENT_MHI_CONS; |
Rama Krishna Phani A | 1b235ff | 2019-06-25 15:13:48 +0530 | [diff] [blame] | 864 | break; |
| 865 | case MHI_CLIENT_IP_HW_1_OUT: |
| 866 | connect_params.sys.client = IPA_CLIENT_MHI2_PROD; |
| 867 | break; |
| 868 | case MHI_CLIENT_IP_HW_1_IN: |
| 869 | connect_params.sys.client = IPA_CLIENT_MHI2_CONS; |
| 870 | break; |
| 871 | default: |
| 872 | pr_err("Invalid channel = 0x%X\n", chid); |
| 873 | return -EINVAL; |
| 874 | } |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 875 | |
Nitesh Gupta | 67c5c61 | 2020-04-30 23:28:38 +0530 | [diff] [blame] | 876 | if ((chid-HW_CHANNEL_BASE) > NUM_HW_CHANNELS) { |
| 877 | pr_err("Invalid Channel = 0x%X\n", chid); |
| 878 | return -EINVAL; |
| 879 | } |
| 880 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 881 | rc = ipa_mhi_connect_pipe(&connect_params, |
| 882 | &mhi->ipa_clnt_hndl[chid-HW_CHANNEL_BASE]); |
| 883 | if (rc) |
Rama Krishna Phani A | 1b235ff | 2019-06-25 15:13:48 +0530 | [diff] [blame] | 884 | pr_err("HW Channel%d start failed : %d\n", |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 885 | chid, rc); |
| 886 | break; |
| 887 | case MHI_DEV_RING_EL_INVALID: |
| 888 | default: |
| 889 | pr_err("Invalid Ring Element type = 0x%X\n", type); |
| 890 | break; |
| 891 | } |
| 892 | |
| 893 | return rc; |
| 894 | } |
| 895 | |
| 896 | static void mhi_dev_core_ack_ctrl_interrupts(struct mhi_dev *dev, |
| 897 | uint32_t *int_value) |
| 898 | { |
| 899 | int rc = 0; |
| 900 | |
| 901 | rc = mhi_dev_mmio_read(dev, MHI_CTRL_INT_STATUS_A7, int_value); |
| 902 | if (rc) { |
| 903 | pr_err("Failed to read A7 status\n"); |
| 904 | return; |
| 905 | } |
| 906 | |
| 907 | mhi_dev_mmio_write(dev, MHI_CTRL_INT_CLEAR_A7, *int_value); |
| 908 | if (rc) { |
| 909 | pr_err("Failed to clear A7 status\n"); |
| 910 | return; |
| 911 | } |
| 912 | } |
| 913 | |
| 914 | static void mhi_dev_fetch_ch_ctx(struct mhi_dev *mhi, uint32_t ch_id) |
| 915 | { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 916 | struct mhi_addr data_transfer; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 917 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 918 | if (mhi->use_ipa) { |
| 919 | data_transfer.host_pa = mhi->ch_ctx_shadow.host_pa + |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 920 | sizeof(struct mhi_dev_ch_ctx) * ch_id; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 921 | data_transfer.phy_addr = mhi->ch_ctx_cache_dma_handle + |
| 922 | sizeof(struct mhi_dev_ch_ctx) * ch_id; |
| 923 | } |
| 924 | |
| 925 | data_transfer.size = sizeof(struct mhi_dev_ch_ctx); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 926 | /* Fetch the channel ctx (*dst, *src, size) */ |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 927 | mhi_dev_read_from_host(mhi, &data_transfer); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 928 | } |
| 929 | |
| 930 | int mhi_dev_syserr(struct mhi_dev *mhi) |
| 931 | { |
| 932 | |
| 933 | if (!mhi) { |
| 934 | pr_err("%s: Invalid MHI ctx\n", __func__); |
| 935 | return -EINVAL; |
| 936 | } |
| 937 | |
| 938 | mhi_dev_dump_mmio(mhi); |
| 939 | pr_err("MHI dev sys error\n"); |
| 940 | |
| 941 | return 0; |
| 942 | } |
| 943 | EXPORT_SYMBOL(mhi_dev_syserr); |
| 944 | |
| 945 | int mhi_dev_send_event(struct mhi_dev *mhi, int evnt_ring, |
| 946 | union mhi_dev_ring_element_type *el) |
| 947 | { |
| 948 | int rc = 0; |
| 949 | uint64_t evnt_ring_idx = mhi->ev_ring_start + evnt_ring; |
| 950 | struct mhi_dev_ring *ring = &mhi->ring[evnt_ring_idx]; |
| 951 | union mhi_dev_ring_ctx *ctx; |
| 952 | struct ep_pcie_msi_config cfg; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 953 | struct mhi_addr transfer_addr; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 954 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 955 | rc = ep_pcie_get_msi_config(mhi->phandle, &cfg); |
| 956 | if (rc) { |
| 957 | pr_err("Error retrieving pcie msi logic\n"); |
| 958 | return rc; |
| 959 | } |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 960 | |
| 961 | if (evnt_ring_idx > mhi->cfg.event_rings) { |
| 962 | pr_err("Invalid event ring idx: %lld\n", evnt_ring_idx); |
| 963 | return -EINVAL; |
| 964 | } |
| 965 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 966 | ctx = (union mhi_dev_ring_ctx *)&mhi->ev_ctx_cache[evnt_ring]; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 967 | if (mhi_ring_get_state(ring) == RING_STATE_UINT) { |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 968 | rc = mhi_ring_start(ring, ctx, mhi); |
| 969 | if (rc) { |
| 970 | mhi_log(MHI_MSG_ERROR, |
| 971 | "error starting event ring %d\n", evnt_ring); |
| 972 | return rc; |
| 973 | } |
| 974 | } |
| 975 | |
| 976 | mutex_lock(&mhi->mhi_event_lock); |
| 977 | /* add the ring element */ |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 978 | mhi_dev_add_element(ring, el, NULL, 0); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 979 | |
| 980 | ring->ring_ctx_shadow->ev.rp = (ring->rd_offset * |
| 981 | sizeof(union mhi_dev_ring_element_type)) + |
| 982 | ring->ring_ctx->generic.rbase; |
| 983 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 984 | mhi_log(MHI_MSG_VERBOSE, "ev.rp = %llx for %lld\n", |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 985 | ring->ring_ctx_shadow->ev.rp, evnt_ring_idx); |
| 986 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 987 | if (mhi->use_ipa) |
| 988 | transfer_addr.host_pa = (mhi->ev_ctx_shadow.host_pa + |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 989 | sizeof(struct mhi_dev_ev_ctx) * |
| 990 | evnt_ring) + (uint32_t) &ring->ring_ctx->ev.rp - |
| 991 | (uint32_t) ring->ring_ctx; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 992 | else |
| 993 | transfer_addr.device_va = (mhi->ev_ctx_shadow.device_va + |
| 994 | sizeof(struct mhi_dev_ev_ctx) * |
| 995 | evnt_ring) + (uint32_t) &ring->ring_ctx->ev.rp - |
| 996 | (uint32_t) ring->ring_ctx; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 997 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 998 | transfer_addr.virt_addr = &ring->ring_ctx_shadow->ev.rp; |
| 999 | transfer_addr.size = sizeof(uint64_t); |
| 1000 | |
| 1001 | mhi_dev_write_to_host(mhi, &transfer_addr, NULL, MHI_DEV_DMA_SYNC); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1002 | /* |
| 1003 | * rp update in host memory should be flushed |
| 1004 | * before sending a MSI to the host |
| 1005 | */ |
| 1006 | wmb(); |
| 1007 | |
| 1008 | mutex_unlock(&mhi->mhi_event_lock); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1009 | mhi_log(MHI_MSG_VERBOSE, "event sent:\n"); |
| 1010 | mhi_log(MHI_MSG_VERBOSE, "evnt ptr : 0x%llx\n", el->evt_tr_comp.ptr); |
| 1011 | mhi_log(MHI_MSG_VERBOSE, "evnt len : 0x%x\n", el->evt_tr_comp.len); |
| 1012 | mhi_log(MHI_MSG_VERBOSE, "evnt code :0x%x\n", el->evt_tr_comp.code); |
| 1013 | mhi_log(MHI_MSG_VERBOSE, "evnt type :0x%x\n", el->evt_tr_comp.type); |
| 1014 | mhi_log(MHI_MSG_VERBOSE, "evnt chid :0x%x\n", el->evt_tr_comp.chid); |
| 1015 | rc = ep_pcie_trigger_msi(mhi_ctx->phandle, ctx->ev.msivec); |
| 1016 | if (rc) { |
| 1017 | pr_err("%s: error sending msi\n", __func__); |
| 1018 | return rc; |
| 1019 | } |
| 1020 | return rc; |
| 1021 | } |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1022 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1023 | static int mhi_dev_send_completion_event(struct mhi_dev_channel *ch, |
| 1024 | uint32_t rd_ofst, uint32_t len, |
| 1025 | enum mhi_dev_cmd_completion_code code) |
| 1026 | { |
| 1027 | int rc = 0; |
| 1028 | union mhi_dev_ring_element_type compl_event; |
| 1029 | struct mhi_dev *mhi = ch->ring->mhi_dev; |
| 1030 | |
| 1031 | compl_event.evt_tr_comp.chid = ch->ch_id; |
| 1032 | compl_event.evt_tr_comp.type = |
| 1033 | MHI_DEV_RING_EL_TRANSFER_COMPLETION_EVENT; |
| 1034 | compl_event.evt_tr_comp.len = len; |
| 1035 | compl_event.evt_tr_comp.code = code; |
| 1036 | compl_event.evt_tr_comp.ptr = ch->ring->ring_ctx->generic.rbase + |
| 1037 | rd_ofst * sizeof(struct mhi_dev_transfer_ring_element); |
| 1038 | |
| 1039 | rc = mhi_dev_send_event(mhi, |
| 1040 | mhi->ch_ctx_cache[ch->ch_id].err_indx, &compl_event); |
| 1041 | |
| 1042 | return rc; |
| 1043 | } |
| 1044 | |
| 1045 | int mhi_dev_send_state_change_event(struct mhi_dev *mhi, |
| 1046 | enum mhi_dev_state state) |
| 1047 | { |
| 1048 | union mhi_dev_ring_element_type event; |
| 1049 | int rc = 0; |
| 1050 | |
| 1051 | event.evt_state_change.type = MHI_DEV_RING_EL_MHI_STATE_CHG; |
| 1052 | event.evt_state_change.mhistate = state; |
| 1053 | |
| 1054 | rc = mhi_dev_send_event(mhi, 0, &event); |
| 1055 | if (rc) { |
| 1056 | pr_err("Sending state change event failed\n"); |
| 1057 | return rc; |
| 1058 | } |
| 1059 | |
| 1060 | return rc; |
| 1061 | } |
| 1062 | EXPORT_SYMBOL(mhi_dev_send_state_change_event); |
| 1063 | |
| 1064 | int mhi_dev_send_ee_event(struct mhi_dev *mhi, enum mhi_dev_execenv exec_env) |
| 1065 | { |
| 1066 | union mhi_dev_ring_element_type event; |
| 1067 | int rc = 0; |
| 1068 | |
| 1069 | event.evt_ee_state.type = MHI_DEV_RING_EL_EE_STATE_CHANGE_NOTIFY; |
| 1070 | event.evt_ee_state.execenv = exec_env; |
| 1071 | |
| 1072 | rc = mhi_dev_send_event(mhi, 0, &event); |
| 1073 | if (rc) { |
| 1074 | pr_err("Sending EE change event failed\n"); |
| 1075 | return rc; |
| 1076 | } |
| 1077 | |
| 1078 | return rc; |
| 1079 | } |
| 1080 | EXPORT_SYMBOL(mhi_dev_send_ee_event); |
| 1081 | |
Siva Kumar Akkireddi | 6a719ae | 2018-06-11 22:44:14 +0530 | [diff] [blame] | 1082 | static void mhi_dev_trigger_cb(enum mhi_client_channel ch_id) |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1083 | { |
| 1084 | struct mhi_dev_ready_cb_info *info; |
Siddartha Mohanadoss | f0aab7a | 2018-03-19 15:19:22 -0700 | [diff] [blame] | 1085 | enum mhi_ctrl_info state_data; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1086 | |
Siddartha Mohanadoss | 32b0249 | 2020-03-19 22:12:00 -0700 | [diff] [blame] | 1087 | /* Currently no clients register for HW channel notify */ |
| 1088 | if (ch_id >= MHI_MAX_SOFTWARE_CHANNELS) |
| 1089 | return; |
| 1090 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1091 | list_for_each_entry(info, &mhi_ctx->client_cb_list, list) |
Siva Kumar Akkireddi | 6a719ae | 2018-06-11 22:44:14 +0530 | [diff] [blame] | 1092 | if (info->cb && info->cb_data.channel == ch_id) { |
Siddartha Mohanadoss | ba314f2 | 2018-03-19 15:43:50 -0700 | [diff] [blame] | 1093 | mhi_ctrl_state_info(info->cb_data.channel, &state_data); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1094 | info->cb_data.ctrl_info = state_data; |
| 1095 | info->cb(&info->cb_data); |
| 1096 | } |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1097 | } |
| 1098 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1099 | int mhi_dev_trigger_hw_acc_wakeup(struct mhi_dev *mhi) |
| 1100 | { |
| 1101 | int rc = 0; |
| 1102 | |
| 1103 | /* |
| 1104 | * Expected usuage is when there is HW ACC traffic IPA uC notifes |
| 1105 | * Q6 -> IPA A7 -> MHI core -> MHI SM |
| 1106 | */ |
| 1107 | rc = mhi_dev_notify_sm_event(MHI_DEV_EVENT_HW_ACC_WAKEUP); |
| 1108 | if (rc) { |
| 1109 | pr_err("error sending SM event\n"); |
| 1110 | return rc; |
| 1111 | } |
| 1112 | |
| 1113 | return rc; |
| 1114 | } |
| 1115 | EXPORT_SYMBOL(mhi_dev_trigger_hw_acc_wakeup); |
| 1116 | |
Siddartha Mohanadoss | b9fc547 | 2018-03-19 14:23:10 -0700 | [diff] [blame] | 1117 | static int mhi_dev_send_cmd_comp_event(struct mhi_dev *mhi, |
| 1118 | enum mhi_dev_cmd_completion_code code) |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1119 | { |
| 1120 | int rc = 0; |
| 1121 | union mhi_dev_ring_element_type event; |
| 1122 | |
Siddartha Mohanadoss | b9fc547 | 2018-03-19 14:23:10 -0700 | [diff] [blame] | 1123 | if (code > MHI_CMD_COMPL_CODE_RES) { |
| 1124 | mhi_log(MHI_MSG_ERROR, |
| 1125 | "Invalid cmd compl code: %d\n", code); |
| 1126 | return -EINVAL; |
| 1127 | } |
| 1128 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1129 | /* send the command completion event to the host */ |
| 1130 | event.evt_cmd_comp.ptr = mhi->cmd_ctx_cache->rbase |
| 1131 | + (mhi->ring[MHI_RING_CMD_ID].rd_offset * |
| 1132 | (sizeof(union mhi_dev_ring_element_type))); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1133 | mhi_log(MHI_MSG_VERBOSE, "evt cmd comp ptr :%d\n", |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1134 | (uint32_t) event.evt_cmd_comp.ptr); |
| 1135 | event.evt_cmd_comp.type = MHI_DEV_RING_EL_CMD_COMPLETION_EVT; |
Siddartha Mohanadoss | b9fc547 | 2018-03-19 14:23:10 -0700 | [diff] [blame] | 1136 | event.evt_cmd_comp.code = code; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1137 | rc = mhi_dev_send_event(mhi, 0, &event); |
| 1138 | if (rc) |
Siddartha Mohanadoss | b9fc547 | 2018-03-19 14:23:10 -0700 | [diff] [blame] | 1139 | mhi_log(MHI_MSG_ERROR, "Send completion failed\n"); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1140 | |
| 1141 | return rc; |
| 1142 | } |
| 1143 | |
| 1144 | static int mhi_dev_process_stop_cmd(struct mhi_dev_ring *ring, uint32_t ch_id, |
| 1145 | struct mhi_dev *mhi) |
| 1146 | { |
| 1147 | int rc = 0; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1148 | struct mhi_addr data_transfer; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1149 | |
| 1150 | if (ring->rd_offset != ring->wr_offset && |
| 1151 | mhi->ch_ctx_cache[ch_id].ch_type == |
| 1152 | MHI_DEV_CH_TYPE_OUTBOUND_CHANNEL) { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1153 | mhi_log(MHI_MSG_INFO, "Pending outbound transaction\n"); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1154 | return 0; |
| 1155 | } else if (mhi->ch_ctx_cache[ch_id].ch_type == |
| 1156 | MHI_DEV_CH_TYPE_INBOUND_CHANNEL && |
Siva Kumar Akkireddi | 0f82ea3 | 2019-11-11 14:56:01 +0530 | [diff] [blame] | 1157 | (mhi->ch[ch_id].pend_wr_count > 0)) { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1158 | mhi_log(MHI_MSG_INFO, "Pending inbound transaction\n"); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1159 | return 0; |
| 1160 | } |
| 1161 | |
| 1162 | /* set the channel to stop */ |
| 1163 | mhi->ch_ctx_cache[ch_id].ch_state = MHI_DEV_CH_STATE_STOP; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1164 | mhi->ch[ch_id].state = MHI_DEV_CH_STOPPED; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1165 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1166 | if (mhi->use_ipa) { |
| 1167 | data_transfer.host_pa = mhi->ch_ctx_shadow.host_pa + |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1168 | sizeof(struct mhi_dev_ch_ctx) * ch_id; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1169 | } else { |
| 1170 | data_transfer.device_va = mhi->ch_ctx_shadow.device_va + |
| 1171 | sizeof(struct mhi_dev_ch_ctx) * ch_id; |
| 1172 | data_transfer.device_pa = mhi->ch_ctx_shadow.device_pa + |
| 1173 | sizeof(struct mhi_dev_ch_ctx) * ch_id; |
| 1174 | } |
| 1175 | data_transfer.size = sizeof(enum mhi_dev_ch_ctx_state); |
| 1176 | data_transfer.virt_addr = &mhi->ch_ctx_cache[ch_id].ch_state; |
| 1177 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1178 | /* update the channel state in the host */ |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1179 | mhi_dev_write_to_host(mhi, &data_transfer, NULL, MHI_DEV_DMA_SYNC); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1180 | |
| 1181 | /* send the completion event to the host */ |
Siddartha Mohanadoss | b9fc547 | 2018-03-19 14:23:10 -0700 | [diff] [blame] | 1182 | rc = mhi_dev_send_cmd_comp_event(mhi, |
| 1183 | MHI_CMD_COMPL_CODE_SUCCESS); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1184 | if (rc) |
| 1185 | pr_err("Error sending command completion event\n"); |
| 1186 | |
| 1187 | return rc; |
| 1188 | } |
| 1189 | |
| 1190 | static void mhi_dev_process_cmd_ring(struct mhi_dev *mhi, |
| 1191 | union mhi_dev_ring_element_type *el, void *ctx) |
| 1192 | { |
| 1193 | int rc = 0; |
| 1194 | uint32_t ch_id = 0; |
| 1195 | union mhi_dev_ring_element_type event; |
| 1196 | struct mhi_addr host_addr; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1197 | struct mhi_dev_channel *ch; |
| 1198 | struct mhi_dev_ring *ring; |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 1199 | union mhi_dev_ring_ctx *evt_ctx; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1200 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1201 | ch_id = el->generic.chid; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1202 | mhi_log(MHI_MSG_VERBOSE, "for channel:%d and cmd:%d\n", |
| 1203 | ch_id, el->generic.type); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1204 | |
| 1205 | switch (el->generic.type) { |
| 1206 | case MHI_DEV_RING_EL_START: |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1207 | mhi_log(MHI_MSG_VERBOSE, "recived start cmd for channel %d\n", |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1208 | ch_id); |
| 1209 | if (ch_id >= (HW_CHANNEL_BASE)) { |
| 1210 | rc = mhi_hwc_chcmd(mhi, ch_id, el->generic.type); |
| 1211 | if (rc) { |
Siddartha Mohanadoss | b9fc547 | 2018-03-19 14:23:10 -0700 | [diff] [blame] | 1212 | mhi_log(MHI_MSG_ERROR, |
| 1213 | "Error with HW channel cmd %d\n", rc); |
| 1214 | rc = mhi_dev_send_cmd_comp_event(mhi, |
| 1215 | MHI_CMD_COMPL_CODE_UNDEFINED); |
| 1216 | if (rc) |
| 1217 | mhi_log(MHI_MSG_ERROR, |
| 1218 | "Error with compl event\n"); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1219 | return; |
| 1220 | } |
| 1221 | goto send_start_completion_event; |
| 1222 | } |
| 1223 | |
| 1224 | /* fetch the channel context from host */ |
| 1225 | mhi_dev_fetch_ch_ctx(mhi, ch_id); |
| 1226 | |
| 1227 | /* Initialize and configure the corresponding channel ring */ |
| 1228 | rc = mhi_ring_start(&mhi->ring[mhi->ch_ring_start + ch_id], |
| 1229 | (union mhi_dev_ring_ctx *)&mhi->ch_ctx_cache[ch_id], |
| 1230 | mhi); |
| 1231 | if (rc) { |
| 1232 | mhi_log(MHI_MSG_ERROR, |
| 1233 | "start ring failed for ch %d\n", ch_id); |
Siddartha Mohanadoss | b9fc547 | 2018-03-19 14:23:10 -0700 | [diff] [blame] | 1234 | rc = mhi_dev_send_cmd_comp_event(mhi, |
| 1235 | MHI_CMD_COMPL_CODE_UNDEFINED); |
| 1236 | if (rc) |
| 1237 | mhi_log(MHI_MSG_ERROR, |
| 1238 | "Error with compl event\n"); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1239 | return; |
| 1240 | } |
| 1241 | |
| 1242 | mhi->ring[mhi->ch_ring_start + ch_id].state = |
| 1243 | RING_STATE_PENDING; |
| 1244 | |
| 1245 | /* set the channel to running */ |
| 1246 | mhi->ch_ctx_cache[ch_id].ch_state = MHI_DEV_CH_STATE_RUNNING; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1247 | mhi->ch[ch_id].state = MHI_DEV_CH_STARTED; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1248 | mhi->ch[ch_id].ch_id = ch_id; |
| 1249 | mhi->ch[ch_id].ring = &mhi->ring[mhi->ch_ring_start + ch_id]; |
| 1250 | mhi->ch[ch_id].ch_type = mhi->ch_ctx_cache[ch_id].ch_type; |
| 1251 | |
| 1252 | /* enable DB for event ring */ |
| 1253 | rc = mhi_dev_mmio_enable_chdb_a7(mhi, ch_id); |
| 1254 | if (rc) { |
| 1255 | pr_err("Failed to enable channel db\n"); |
Siddartha Mohanadoss | b9fc547 | 2018-03-19 14:23:10 -0700 | [diff] [blame] | 1256 | rc = mhi_dev_send_cmd_comp_event(mhi, |
| 1257 | MHI_CMD_COMPL_CODE_UNDEFINED); |
| 1258 | if (rc) |
| 1259 | mhi_log(MHI_MSG_ERROR, |
| 1260 | "Error with compl event\n"); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1261 | return; |
| 1262 | } |
| 1263 | |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 1264 | if (mhi->use_ipa) { |
| 1265 | uint32_t evnt_ring_idx = mhi->ev_ring_start + |
| 1266 | mhi->ch_ctx_cache[ch_id].err_indx; |
| 1267 | struct mhi_dev_ring *evt_ring = |
| 1268 | &mhi->ring[evnt_ring_idx]; |
| 1269 | evt_ctx = (union mhi_dev_ring_ctx *)&mhi->ev_ctx_cache |
| 1270 | [mhi->ch_ctx_cache[ch_id].err_indx]; |
| 1271 | if (mhi_ring_get_state(evt_ring) == RING_STATE_UINT) { |
| 1272 | rc = mhi_ring_start(evt_ring, evt_ctx, mhi); |
| 1273 | if (rc) { |
| 1274 | mhi_log(MHI_MSG_ERROR, |
| 1275 | "error starting event ring %d\n", |
| 1276 | mhi->ch_ctx_cache[ch_id].err_indx); |
| 1277 | return; |
| 1278 | } |
| 1279 | } |
| 1280 | mhi_dev_alloc_evt_buf_evt_req(mhi, &mhi->ch[ch_id], |
| 1281 | evt_ring); |
| 1282 | } |
| 1283 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1284 | if (mhi->use_ipa) |
| 1285 | host_addr.host_pa = mhi->ch_ctx_shadow.host_pa + |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1286 | sizeof(struct mhi_dev_ch_ctx) * ch_id; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1287 | else |
| 1288 | host_addr.device_va = mhi->ch_ctx_shadow.device_va + |
| 1289 | sizeof(struct mhi_dev_ch_ctx) * ch_id; |
| 1290 | |
| 1291 | host_addr.virt_addr = &mhi->ch_ctx_cache[ch_id].ch_state; |
| 1292 | host_addr.size = sizeof(enum mhi_dev_ch_ctx_state); |
| 1293 | |
| 1294 | mhi_dev_write_to_host(mhi, &host_addr, NULL, MHI_DEV_DMA_SYNC); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1295 | |
| 1296 | send_start_completion_event: |
Siddartha Mohanadoss | b9fc547 | 2018-03-19 14:23:10 -0700 | [diff] [blame] | 1297 | rc = mhi_dev_send_cmd_comp_event(mhi, |
| 1298 | MHI_CMD_COMPL_CODE_SUCCESS); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1299 | if (rc) |
| 1300 | pr_err("Error sending command completion event\n"); |
| 1301 | |
Siva Kumar Akkireddi | 8fd5e6c | 2018-05-21 14:53:10 +0530 | [diff] [blame] | 1302 | mhi_update_state_info(ch_id, MHI_STATE_CONNECTED); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1303 | /* Trigger callback to clients */ |
Siva Kumar Akkireddi | 6a719ae | 2018-06-11 22:44:14 +0530 | [diff] [blame] | 1304 | mhi_dev_trigger_cb(ch_id); |
Siva Kumar Akkireddi | 9ca7e34 | 2018-12-14 04:53:01 +0530 | [diff] [blame] | 1305 | mhi_uci_chan_state_notify(mhi, ch_id, MHI_STATE_CONNECTED); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1306 | break; |
| 1307 | case MHI_DEV_RING_EL_STOP: |
| 1308 | if (ch_id >= HW_CHANNEL_BASE) { |
| 1309 | rc = mhi_hwc_chcmd(mhi, ch_id, el->generic.type); |
Siddartha Mohanadoss | b9fc547 | 2018-03-19 14:23:10 -0700 | [diff] [blame] | 1310 | if (rc) |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1311 | mhi_log(MHI_MSG_ERROR, |
| 1312 | "send channel stop cmd event failed\n"); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1313 | |
| 1314 | /* send the completion event to the host */ |
| 1315 | event.evt_cmd_comp.ptr = mhi->cmd_ctx_cache->rbase + |
| 1316 | (mhi->ring[MHI_RING_CMD_ID].rd_offset * |
| 1317 | (sizeof(union mhi_dev_ring_element_type))); |
| 1318 | event.evt_cmd_comp.type = |
| 1319 | MHI_DEV_RING_EL_CMD_COMPLETION_EVT; |
| 1320 | if (rc == 0) |
| 1321 | event.evt_cmd_comp.code = |
| 1322 | MHI_CMD_COMPL_CODE_SUCCESS; |
| 1323 | else |
| 1324 | event.evt_cmd_comp.code = |
| 1325 | MHI_CMD_COMPL_CODE_UNDEFINED; |
| 1326 | |
| 1327 | rc = mhi_dev_send_event(mhi, 0, &event); |
| 1328 | if (rc) { |
| 1329 | pr_err("stop event send failed\n"); |
| 1330 | return; |
| 1331 | } |
| 1332 | } else { |
| 1333 | /* |
| 1334 | * Check if there are any pending transactions for the |
| 1335 | * ring associated with the channel. If no, proceed to |
| 1336 | * write disable the channel state else send stop |
| 1337 | * channel command to check if one can suspend the |
| 1338 | * command. |
| 1339 | */ |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1340 | ring = &mhi->ring[ch_id + mhi->ch_ring_start]; |
| 1341 | if (ring->state == RING_STATE_UINT) { |
| 1342 | pr_err("Channel not opened for %d\n", ch_id); |
| 1343 | return; |
| 1344 | } |
| 1345 | |
| 1346 | ch = &mhi->ch[ch_id]; |
| 1347 | |
| 1348 | mutex_lock(&ch->ch_lock); |
| 1349 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1350 | mhi->ch[ch_id].state = MHI_DEV_CH_PENDING_STOP; |
| 1351 | rc = mhi_dev_process_stop_cmd( |
| 1352 | &mhi->ring[mhi->ch_ring_start + ch_id], |
| 1353 | ch_id, mhi); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1354 | if (rc) |
| 1355 | pr_err("stop event send failed\n"); |
| 1356 | |
| 1357 | mutex_unlock(&ch->ch_lock); |
Siddartha Mohanadoss | ba314f2 | 2018-03-19 15:43:50 -0700 | [diff] [blame] | 1358 | mhi_update_state_info(ch_id, MHI_STATE_DISCONNECTED); |
Siva Kumar Akkireddi | 9ca7e34 | 2018-12-14 04:53:01 +0530 | [diff] [blame] | 1359 | /* Trigger callback to clients */ |
| 1360 | mhi_dev_trigger_cb(ch_id); |
| 1361 | mhi_uci_chan_state_notify(mhi, ch_id, |
| 1362 | MHI_STATE_DISCONNECTED); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1363 | } |
| 1364 | break; |
| 1365 | case MHI_DEV_RING_EL_RESET: |
| 1366 | mhi_log(MHI_MSG_VERBOSE, |
| 1367 | "received reset cmd for channel %d\n", ch_id); |
| 1368 | if (ch_id >= HW_CHANNEL_BASE) { |
| 1369 | rc = mhi_hwc_chcmd(mhi, ch_id, el->generic.type); |
Siddartha Mohanadoss | b9fc547 | 2018-03-19 14:23:10 -0700 | [diff] [blame] | 1370 | if (rc) |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1371 | mhi_log(MHI_MSG_ERROR, |
| 1372 | "send channel stop cmd event failed\n"); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1373 | |
| 1374 | /* send the completion event to the host */ |
| 1375 | event.evt_cmd_comp.ptr = mhi->cmd_ctx_cache->rbase + |
| 1376 | (mhi->ring[MHI_RING_CMD_ID].rd_offset * |
| 1377 | (sizeof(union mhi_dev_ring_element_type))); |
| 1378 | event.evt_cmd_comp.type = |
| 1379 | MHI_DEV_RING_EL_CMD_COMPLETION_EVT; |
| 1380 | if (rc == 0) |
| 1381 | event.evt_cmd_comp.code = |
| 1382 | MHI_CMD_COMPL_CODE_SUCCESS; |
| 1383 | else |
| 1384 | event.evt_cmd_comp.code = |
| 1385 | MHI_CMD_COMPL_CODE_UNDEFINED; |
| 1386 | |
| 1387 | rc = mhi_dev_send_event(mhi, 0, &event); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1388 | if (rc) { |
| 1389 | pr_err("stop event send failed\n"); |
| 1390 | return; |
| 1391 | } |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1392 | } else { |
| 1393 | |
| 1394 | mhi_log(MHI_MSG_VERBOSE, |
| 1395 | "received reset cmd for channel %d\n", |
| 1396 | ch_id); |
| 1397 | |
| 1398 | ring = &mhi->ring[ch_id + mhi->ch_ring_start]; |
| 1399 | if (ring->state == RING_STATE_UINT) { |
| 1400 | pr_err("Channel not opened for %d\n", ch_id); |
| 1401 | return; |
| 1402 | } |
| 1403 | |
| 1404 | ch = &mhi->ch[ch_id]; |
| 1405 | |
| 1406 | mutex_lock(&ch->ch_lock); |
| 1407 | |
| 1408 | /* hard stop and set the channel to stop */ |
| 1409 | mhi->ch_ctx_cache[ch_id].ch_state = |
| 1410 | MHI_DEV_CH_STATE_DISABLED; |
| 1411 | mhi->ch[ch_id].state = MHI_DEV_CH_STOPPED; |
| 1412 | if (mhi->use_ipa) |
| 1413 | host_addr.host_pa = |
| 1414 | mhi->ch_ctx_shadow.host_pa + |
| 1415 | (sizeof(struct mhi_dev_ch_ctx) * ch_id); |
| 1416 | else |
| 1417 | host_addr.device_va = |
| 1418 | mhi->ch_ctx_shadow.device_va + |
| 1419 | (sizeof(struct mhi_dev_ch_ctx) * ch_id); |
| 1420 | |
| 1421 | host_addr.virt_addr = |
| 1422 | &mhi->ch_ctx_cache[ch_id].ch_state; |
| 1423 | host_addr.size = sizeof(enum mhi_dev_ch_ctx_state); |
| 1424 | |
| 1425 | /* update the channel state in the host */ |
| 1426 | mhi_dev_write_to_host(mhi, &host_addr, NULL, |
| 1427 | MHI_DEV_DMA_SYNC); |
| 1428 | |
| 1429 | /* send the completion event to the host */ |
Siddartha Mohanadoss | b9fc547 | 2018-03-19 14:23:10 -0700 | [diff] [blame] | 1430 | rc = mhi_dev_send_cmd_comp_event(mhi, |
| 1431 | MHI_CMD_COMPL_CODE_SUCCESS); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1432 | if (rc) |
| 1433 | pr_err("Error sending command completion event\n"); |
| 1434 | mutex_unlock(&ch->ch_lock); |
Siddartha Mohanadoss | ba314f2 | 2018-03-19 15:43:50 -0700 | [diff] [blame] | 1435 | mhi_update_state_info(ch_id, MHI_STATE_DISCONNECTED); |
Siva Kumar Akkireddi | 9ca7e34 | 2018-12-14 04:53:01 +0530 | [diff] [blame] | 1436 | mhi_dev_trigger_cb(ch_id); |
| 1437 | mhi_uci_chan_state_notify(mhi, ch_id, |
| 1438 | MHI_STATE_DISCONNECTED); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1439 | } |
| 1440 | break; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1441 | default: |
| 1442 | pr_err("%s: Invalid command:%d\n", __func__, el->generic.type); |
| 1443 | break; |
| 1444 | } |
| 1445 | } |
| 1446 | |
| 1447 | static void mhi_dev_process_tre_ring(struct mhi_dev *mhi, |
| 1448 | union mhi_dev_ring_element_type *el, void *ctx) |
| 1449 | { |
| 1450 | struct mhi_dev_ring *ring = (struct mhi_dev_ring *)ctx; |
| 1451 | struct mhi_dev_channel *ch; |
| 1452 | struct mhi_dev_client_cb_reason reason; |
| 1453 | |
| 1454 | if (ring->id < mhi->ch_ring_start) { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1455 | mhi_log(MHI_MSG_VERBOSE, |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1456 | "invalid channel ring id (%d), should be < %d\n", |
| 1457 | ring->id, mhi->ch_ring_start); |
| 1458 | return; |
| 1459 | } |
| 1460 | |
| 1461 | ch = &mhi->ch[ring->id - mhi->ch_ring_start]; |
| 1462 | reason.ch_id = ch->ch_id; |
| 1463 | reason.reason = MHI_DEV_TRE_AVAILABLE; |
| 1464 | |
| 1465 | /* Invoke a callback to let the client know its data is ready. |
| 1466 | * Copy this event to the clients context so that it can be |
| 1467 | * sent out once the client has fetch the data. Update the rp |
| 1468 | * before sending the data as part of the event completion |
| 1469 | */ |
| 1470 | if (ch->active_client && ch->active_client->event_trigger != NULL) |
| 1471 | ch->active_client->event_trigger(&reason); |
| 1472 | } |
| 1473 | |
| 1474 | static void mhi_dev_process_ring_pending(struct work_struct *work) |
| 1475 | { |
| 1476 | struct mhi_dev *mhi = container_of(work, |
| 1477 | struct mhi_dev, pending_work); |
| 1478 | struct list_head *cp, *q; |
| 1479 | struct mhi_dev_ring *ring; |
| 1480 | struct mhi_dev_channel *ch; |
| 1481 | int rc = 0; |
| 1482 | |
| 1483 | mutex_lock(&mhi_ctx->mhi_lock); |
| 1484 | rc = mhi_dev_process_ring(&mhi->ring[mhi->cmd_ring_idx]); |
| 1485 | if (rc) { |
| 1486 | mhi_log(MHI_MSG_ERROR, "error processing command ring\n"); |
| 1487 | goto exit; |
| 1488 | } |
| 1489 | |
| 1490 | list_for_each_safe(cp, q, &mhi->process_ring_list) { |
| 1491 | ring = list_entry(cp, struct mhi_dev_ring, list); |
| 1492 | list_del(cp); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1493 | mhi_log(MHI_MSG_VERBOSE, "processing ring %d\n", ring->id); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1494 | rc = mhi_dev_process_ring(ring); |
| 1495 | if (rc) { |
| 1496 | mhi_log(MHI_MSG_ERROR, |
| 1497 | "error processing ring %d\n", ring->id); |
| 1498 | goto exit; |
| 1499 | } |
| 1500 | |
| 1501 | if (ring->id < mhi->ch_ring_start) { |
| 1502 | mhi_log(MHI_MSG_ERROR, |
| 1503 | "ring (%d) is not a channel ring\n", ring->id); |
| 1504 | goto exit; |
| 1505 | } |
| 1506 | |
| 1507 | ch = &mhi->ch[ring->id - mhi->ch_ring_start]; |
| 1508 | rc = mhi_dev_mmio_enable_chdb_a7(mhi, ch->ch_id); |
| 1509 | if (rc) { |
| 1510 | mhi_log(MHI_MSG_ERROR, |
| 1511 | "error enabling chdb interrupt for %d\n", ch->ch_id); |
| 1512 | goto exit; |
| 1513 | } |
| 1514 | } |
| 1515 | |
| 1516 | exit: |
| 1517 | mutex_unlock(&mhi_ctx->mhi_lock); |
| 1518 | } |
| 1519 | |
| 1520 | static int mhi_dev_get_event_notify(enum mhi_dev_state state, |
| 1521 | enum mhi_dev_event *event) |
| 1522 | { |
| 1523 | int rc = 0; |
| 1524 | |
| 1525 | switch (state) { |
| 1526 | case MHI_DEV_M0_STATE: |
| 1527 | *event = MHI_DEV_EVENT_M0_STATE; |
| 1528 | break; |
| 1529 | case MHI_DEV_M1_STATE: |
| 1530 | *event = MHI_DEV_EVENT_M1_STATE; |
| 1531 | break; |
| 1532 | case MHI_DEV_M2_STATE: |
| 1533 | *event = MHI_DEV_EVENT_M2_STATE; |
| 1534 | break; |
| 1535 | case MHI_DEV_M3_STATE: |
| 1536 | *event = MHI_DEV_EVENT_M3_STATE; |
| 1537 | break; |
| 1538 | default: |
| 1539 | rc = -EINVAL; |
| 1540 | break; |
| 1541 | } |
| 1542 | |
| 1543 | return rc; |
| 1544 | } |
| 1545 | |
| 1546 | static void mhi_dev_queue_channel_db(struct mhi_dev *mhi, |
| 1547 | uint32_t chintr_value, uint32_t ch_num) |
| 1548 | { |
| 1549 | struct mhi_dev_ring *ring; |
| 1550 | int rc = 0; |
| 1551 | |
| 1552 | for (; chintr_value; ch_num++, chintr_value >>= 1) { |
| 1553 | if (chintr_value & 1) { |
| 1554 | ring = &mhi->ring[ch_num + mhi->ch_ring_start]; |
| 1555 | if (ring->state == RING_STATE_UINT) { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1556 | pr_debug("Channel not opened for %d\n", ch_num); |
Siva Kumar Akkireddi | 3d6d73d | 2018-10-30 15:23:41 +0530 | [diff] [blame] | 1557 | continue; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1558 | } |
| 1559 | mhi_ring_set_state(ring, RING_STATE_PENDING); |
| 1560 | list_add(&ring->list, &mhi->process_ring_list); |
| 1561 | rc = mhi_dev_mmio_disable_chdb_a7(mhi, ch_num); |
| 1562 | if (rc) { |
| 1563 | pr_err("Error disabling chdb\n"); |
| 1564 | return; |
| 1565 | } |
| 1566 | queue_work(mhi->pending_ring_wq, &mhi->pending_work); |
| 1567 | } |
| 1568 | } |
| 1569 | } |
| 1570 | |
| 1571 | static void mhi_dev_check_channel_interrupt(struct mhi_dev *mhi) |
| 1572 | { |
| 1573 | int i, rc = 0; |
| 1574 | uint32_t chintr_value = 0, ch_num = 0; |
| 1575 | |
| 1576 | rc = mhi_dev_mmio_read_chdb_status_interrupts(mhi); |
| 1577 | if (rc) { |
| 1578 | pr_err("Read channel db\n"); |
| 1579 | return; |
| 1580 | } |
| 1581 | |
| 1582 | for (i = 0; i < MHI_MASK_ROWS_CH_EV_DB; i++) { |
| 1583 | ch_num = i * MHI_MASK_CH_EV_LEN; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1584 | /* Process channel status whose mask is enabled */ |
| 1585 | chintr_value = (mhi->chdb[i].status & mhi->chdb[i].mask); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1586 | if (chintr_value) { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1587 | mhi_log(MHI_MSG_VERBOSE, |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1588 | "processing id: %d, ch interrupt 0x%x\n", |
| 1589 | i, chintr_value); |
| 1590 | mhi_dev_queue_channel_db(mhi, chintr_value, ch_num); |
| 1591 | rc = mhi_dev_mmio_write(mhi, MHI_CHDB_INT_CLEAR_A7_n(i), |
| 1592 | mhi->chdb[i].status); |
| 1593 | if (rc) { |
| 1594 | pr_err("Error writing interrupt clear for A7\n"); |
| 1595 | return; |
| 1596 | } |
| 1597 | } |
| 1598 | } |
| 1599 | } |
| 1600 | |
Siva Kumar Akkireddi | 9ca7e34 | 2018-12-14 04:53:01 +0530 | [diff] [blame] | 1601 | static void mhi_update_state_info_all(enum mhi_ctrl_info info) |
| 1602 | { |
| 1603 | int i; |
| 1604 | struct mhi_dev_client_cb_reason reason; |
| 1605 | |
| 1606 | mhi_ctx->ctrl_info = info; |
Siddartha Mohanadoss | 32b0249 | 2020-03-19 22:12:00 -0700 | [diff] [blame] | 1607 | for (i = 0; i < MHI_MAX_SOFTWARE_CHANNELS; ++i) { |
Siva Kumar Akkireddi | 9ca7e34 | 2018-12-14 04:53:01 +0530 | [diff] [blame] | 1608 | channel_state_info[i].ctrl_info = info; |
Siva Kumar Akkireddi | 8ca68e6 | 2019-01-16 21:38:13 +0530 | [diff] [blame] | 1609 | /* Notify kernel clients */ |
| 1610 | mhi_dev_trigger_cb(i); |
| 1611 | } |
Siva Kumar Akkireddi | 9ca7e34 | 2018-12-14 04:53:01 +0530 | [diff] [blame] | 1612 | |
| 1613 | /* For legacy reasons for QTI client */ |
| 1614 | reason.reason = MHI_DEV_CTRL_UPDATE; |
| 1615 | uci_ctrl_update(&reason); |
| 1616 | } |
| 1617 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1618 | static int mhi_dev_abort(struct mhi_dev *mhi) |
| 1619 | { |
| 1620 | struct mhi_dev_channel *ch; |
| 1621 | struct mhi_dev_ring *ring; |
| 1622 | int ch_id = 0, rc = 0; |
| 1623 | |
| 1624 | /* Hard stop all the channels */ |
| 1625 | for (ch_id = 0; ch_id < mhi->cfg.channels; ch_id++) { |
| 1626 | ring = &mhi->ring[ch_id + mhi->ch_ring_start]; |
| 1627 | if (ring->state == RING_STATE_UINT) |
| 1628 | continue; |
| 1629 | |
| 1630 | ch = &mhi->ch[ch_id]; |
| 1631 | mutex_lock(&ch->ch_lock); |
| 1632 | mhi->ch[ch_id].state = MHI_DEV_CH_STOPPED; |
| 1633 | mutex_unlock(&ch->ch_lock); |
| 1634 | } |
| 1635 | |
Siva Kumar Akkireddi | 9ca7e34 | 2018-12-14 04:53:01 +0530 | [diff] [blame] | 1636 | /* Update channel state and notify clients */ |
| 1637 | mhi_update_state_info_all(MHI_STATE_DISCONNECTED); |
| 1638 | mhi_uci_chan_state_notify_all(mhi, MHI_STATE_DISCONNECTED); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1639 | |
| 1640 | flush_workqueue(mhi->ring_init_wq); |
| 1641 | flush_workqueue(mhi->pending_ring_wq); |
| 1642 | |
| 1643 | /* Initiate MHI IPA reset */ |
| 1644 | ipa_mhi_destroy(); |
| 1645 | |
| 1646 | /* Clean up initialized channels */ |
| 1647 | rc = mhi_deinit(mhi); |
| 1648 | if (rc) { |
| 1649 | pr_err("Error during mhi_deinit with %d\n", rc); |
| 1650 | return rc; |
| 1651 | } |
| 1652 | |
| 1653 | rc = mhi_dev_mmio_mask_chdb_interrupts(mhi_ctx); |
| 1654 | if (rc) { |
| 1655 | pr_err("Failed to enable channel db\n"); |
| 1656 | return rc; |
| 1657 | } |
| 1658 | |
| 1659 | rc = mhi_dev_mmio_disable_ctrl_interrupt(mhi_ctx); |
| 1660 | if (rc) { |
| 1661 | pr_err("Failed to enable control interrupt\n"); |
| 1662 | return rc; |
| 1663 | } |
| 1664 | |
| 1665 | rc = mhi_dev_mmio_disable_cmdb_interrupt(mhi_ctx); |
| 1666 | if (rc) { |
| 1667 | pr_err("Failed to enable command db\n"); |
| 1668 | return rc; |
| 1669 | } |
| 1670 | |
| 1671 | |
| 1672 | atomic_set(&mhi_ctx->re_init_done, 0); |
| 1673 | |
| 1674 | mhi_log(MHI_MSG_INFO, |
| 1675 | "Register a PCIe callback during re-init\n"); |
| 1676 | mhi_ctx->event_reg.events = EP_PCIE_EVENT_LINKUP; |
| 1677 | mhi_ctx->event_reg.user = mhi_ctx; |
| 1678 | mhi_ctx->event_reg.mode = EP_PCIE_TRIGGER_CALLBACK; |
| 1679 | mhi_ctx->event_reg.callback = mhi_dev_resume_init_with_link_up; |
| 1680 | mhi_ctx->event_reg.options = MHI_REINIT; |
| 1681 | |
| 1682 | rc = ep_pcie_register_event(mhi_ctx->phandle, |
| 1683 | &mhi_ctx->event_reg); |
| 1684 | if (rc) { |
| 1685 | pr_err("Failed to register for events from PCIe\n"); |
| 1686 | return rc; |
| 1687 | } |
| 1688 | |
| 1689 | /* Set RESET field to 0 */ |
| 1690 | mhi_dev_mmio_reset(mhi_ctx); |
| 1691 | |
| 1692 | return rc; |
| 1693 | } |
| 1694 | |
| 1695 | static void mhi_dev_transfer_completion_cb(void *mreq) |
| 1696 | { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1697 | int rc = 0; |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 1698 | struct mhi_req *req = mreq; |
| 1699 | struct mhi_dev_channel *ch = req->client->channel; |
| 1700 | u32 snd_cmpl = req->snd_cmpl; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1701 | |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 1702 | if (mhi_ctx->ch_ctx_cache[ch->ch_id].ch_type == |
Siva Kumar Akkireddi | 0f82ea3 | 2019-11-11 14:56:01 +0530 | [diff] [blame] | 1703 | MHI_DEV_CH_TYPE_INBOUND_CHANNEL) |
| 1704 | ch->pend_wr_count--; |
| 1705 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1706 | dma_unmap_single(&mhi_ctx->pdev->dev, req->dma, |
| 1707 | req->len, DMA_FROM_DEVICE); |
| 1708 | |
Siva Kumar Akkireddi | 0f82ea3 | 2019-11-11 14:56:01 +0530 | [diff] [blame] | 1709 | /* |
| 1710 | * Channel got closed with transfers pending |
| 1711 | * Do not trigger callback or send cmpl to host |
| 1712 | */ |
| 1713 | if (ch->state == MHI_DEV_CH_CLOSED) { |
| 1714 | mhi_log(MHI_MSG_DBG, "Ch %d closed with %d writes pending\n", |
| 1715 | ch->ch_id, ch->pend_wr_count + 1); |
| 1716 | return; |
| 1717 | } |
| 1718 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1719 | /* Trigger client call back */ |
| 1720 | req->client_cb(req); |
| 1721 | |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 1722 | /* Flush read completions to host */ |
| 1723 | if (snd_cmpl && mhi_ctx->ch_ctx_cache[ch->ch_id].ch_type == |
| 1724 | MHI_DEV_CH_TYPE_OUTBOUND_CHANNEL) { |
| 1725 | mhi_log(MHI_MSG_DBG, "Calling flush for ch %d\n", ch->ch_id); |
| 1726 | rc = mhi_dev_flush_transfer_completion_events(mhi_ctx, ch); |
| 1727 | if (rc) { |
| 1728 | mhi_log(MHI_MSG_ERROR, |
| 1729 | "Failed to flush read completions to host\n"); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1730 | } |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 1731 | } |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1732 | |
| 1733 | if (ch->state == MHI_DEV_CH_PENDING_STOP) { |
| 1734 | ch->state = MHI_DEV_CH_STOPPED; |
| 1735 | rc = mhi_dev_process_stop_cmd(ch->ring, ch->ch_id, mhi_ctx); |
| 1736 | if (rc) |
| 1737 | mhi_log(MHI_MSG_ERROR, |
| 1738 | "Error while stopping channel (%d)\n", ch->ch_id); |
| 1739 | } |
| 1740 | } |
| 1741 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1742 | static void mhi_dev_scheduler(struct work_struct *work) |
| 1743 | { |
| 1744 | struct mhi_dev *mhi = container_of(work, |
| 1745 | struct mhi_dev, chdb_ctrl_work); |
| 1746 | int rc = 0; |
| 1747 | uint32_t int_value = 0; |
| 1748 | struct mhi_dev_ring *ring; |
| 1749 | enum mhi_dev_state state; |
| 1750 | enum mhi_dev_event event = 0; |
Siddartha Mohanadoss | e81dee9 | 2018-12-06 18:22:28 -0800 | [diff] [blame] | 1751 | u32 mhi_reset; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1752 | |
| 1753 | mutex_lock(&mhi_ctx->mhi_lock); |
| 1754 | /* Check for interrupts */ |
| 1755 | mhi_dev_core_ack_ctrl_interrupts(mhi, &int_value); |
| 1756 | |
| 1757 | if (int_value & MHI_MMIO_CTRL_INT_STATUS_A7_MSK) { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1758 | mhi_log(MHI_MSG_VERBOSE, |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1759 | "processing ctrl interrupt with %d\n", int_value); |
Siva Kumar Akkireddi | 4e38821 | 2019-02-05 19:53:19 +0530 | [diff] [blame] | 1760 | |
| 1761 | rc = mhi_dev_mmio_read(mhi, BHI_IMGTXDB, &bhi_imgtxdb); |
| 1762 | mhi_log(MHI_MSG_DBG, "BHI_IMGTXDB = 0x%x\n", bhi_imgtxdb); |
| 1763 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1764 | rc = mhi_dev_mmio_get_mhi_state(mhi, &state, &mhi_reset); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1765 | if (rc) { |
| 1766 | pr_err("%s: get mhi state failed\n", __func__); |
| 1767 | mutex_unlock(&mhi_ctx->mhi_lock); |
| 1768 | return; |
| 1769 | } |
| 1770 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1771 | if (mhi_reset) { |
| 1772 | mhi_log(MHI_MSG_VERBOSE, |
| 1773 | "processing mhi device reset\n"); |
| 1774 | rc = mhi_dev_abort(mhi); |
| 1775 | if (rc) |
| 1776 | pr_err("device reset failed:%d\n", rc); |
| 1777 | mutex_unlock(&mhi_ctx->mhi_lock); |
| 1778 | queue_work(mhi->ring_init_wq, &mhi->re_init); |
| 1779 | return; |
| 1780 | } |
| 1781 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1782 | rc = mhi_dev_get_event_notify(state, &event); |
| 1783 | if (rc) { |
| 1784 | pr_err("unsupported state :%d\n", state); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1785 | goto fail; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1786 | } |
| 1787 | |
| 1788 | rc = mhi_dev_notify_sm_event(event); |
| 1789 | if (rc) { |
| 1790 | pr_err("error sending SM event\n"); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1791 | goto fail; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1792 | } |
| 1793 | } |
| 1794 | |
| 1795 | if (int_value & MHI_MMIO_CTRL_CRDB_STATUS_MSK) { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1796 | mhi_log(MHI_MSG_VERBOSE, |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1797 | "processing cmd db interrupt with %d\n", int_value); |
| 1798 | ring = &mhi->ring[MHI_RING_CMD_ID]; |
| 1799 | ring->state = RING_STATE_PENDING; |
| 1800 | queue_work(mhi->pending_ring_wq, &mhi->pending_work); |
| 1801 | } |
| 1802 | |
| 1803 | /* get the specific channel interrupts */ |
| 1804 | mhi_dev_check_channel_interrupt(mhi); |
| 1805 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1806 | fail: |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1807 | mutex_unlock(&mhi_ctx->mhi_lock); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1808 | |
| 1809 | if (mhi->config_iatu || mhi->mhi_int) |
| 1810 | enable_irq(mhi->mhi_irq); |
| 1811 | else |
| 1812 | ep_pcie_mask_irq_event(mhi->phandle, |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1813 | EP_PCIE_INT_EVT_MHI_A7, true); |
| 1814 | } |
| 1815 | |
| 1816 | void mhi_dev_notify_a7_event(struct mhi_dev *mhi) |
| 1817 | { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1818 | |
| 1819 | if (!atomic_read(&mhi->mhi_dev_wake)) { |
| 1820 | pm_stay_awake(mhi->dev); |
| 1821 | atomic_set(&mhi->mhi_dev_wake, 1); |
| 1822 | } |
| 1823 | mhi_log(MHI_MSG_VERBOSE, "acquiring mhi wakelock\n"); |
| 1824 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1825 | schedule_work(&mhi->chdb_ctrl_work); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1826 | mhi_log(MHI_MSG_VERBOSE, "mhi irq triggered\n"); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1827 | } |
| 1828 | EXPORT_SYMBOL(mhi_dev_notify_a7_event); |
| 1829 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1830 | static irqreturn_t mhi_dev_isr(int irq, void *dev_id) |
| 1831 | { |
| 1832 | struct mhi_dev *mhi = dev_id; |
| 1833 | |
Rama Krishna Phani A | 62cedde | 2018-06-11 19:57:00 +0530 | [diff] [blame] | 1834 | if (!atomic_read(&mhi->mhi_dev_wake)) { |
| 1835 | pm_stay_awake(mhi->dev); |
| 1836 | atomic_set(&mhi->mhi_dev_wake, 1); |
| 1837 | mhi_log(MHI_MSG_VERBOSE, "acquiring mhi wakelock in ISR\n"); |
| 1838 | } |
| 1839 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1840 | disable_irq_nosync(mhi->mhi_irq); |
| 1841 | schedule_work(&mhi->chdb_ctrl_work); |
| 1842 | mhi_log(MHI_MSG_VERBOSE, "mhi irq triggered\n"); |
| 1843 | |
| 1844 | return IRQ_HANDLED; |
| 1845 | } |
| 1846 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1847 | int mhi_dev_config_outbound_iatu(struct mhi_dev *mhi) |
| 1848 | { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1849 | struct ep_pcie_iatu control, data; |
| 1850 | int rc = 0; |
| 1851 | struct ep_pcie_iatu entries[MHI_HOST_REGION_NUM]; |
| 1852 | |
| 1853 | data.start = mhi->data_base.device_pa; |
| 1854 | data.end = mhi->data_base.device_pa + mhi->data_base.size - 1; |
| 1855 | data.tgt_lower = HOST_ADDR_LSB(mhi->data_base.host_pa); |
| 1856 | data.tgt_upper = HOST_ADDR_MSB(mhi->data_base.host_pa); |
| 1857 | |
| 1858 | control.start = mhi->ctrl_base.device_pa; |
| 1859 | control.end = mhi->ctrl_base.device_pa + mhi->ctrl_base.size - 1; |
| 1860 | control.tgt_lower = HOST_ADDR_LSB(mhi->ctrl_base.host_pa); |
| 1861 | control.tgt_upper = HOST_ADDR_MSB(mhi->ctrl_base.host_pa); |
| 1862 | |
| 1863 | entries[0] = data; |
| 1864 | entries[1] = control; |
| 1865 | |
| 1866 | rc = ep_pcie_config_outbound_iatu(mhi_ctx->phandle, entries, |
| 1867 | MHI_HOST_REGION_NUM); |
| 1868 | if (rc) { |
| 1869 | pr_err("error configure iATU\n"); |
| 1870 | return rc; |
| 1871 | } |
| 1872 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1873 | return 0; |
| 1874 | } |
| 1875 | EXPORT_SYMBOL(mhi_dev_config_outbound_iatu); |
| 1876 | |
| 1877 | static int mhi_dev_cache_host_cfg(struct mhi_dev *mhi) |
| 1878 | { |
| 1879 | int rc = 0; |
| 1880 | struct platform_device *pdev; |
| 1881 | uint64_t addr1 = 0; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1882 | struct mhi_addr data_transfer; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1883 | |
| 1884 | pdev = mhi->pdev; |
| 1885 | |
| 1886 | /* Get host memory region configuration */ |
| 1887 | mhi_dev_get_mhi_addr(mhi); |
| 1888 | |
| 1889 | mhi->ctrl_base.host_pa = HOST_ADDR(mhi->host_addr.ctrl_base_lsb, |
| 1890 | mhi->host_addr.ctrl_base_msb); |
| 1891 | mhi->data_base.host_pa = HOST_ADDR(mhi->host_addr.data_base_lsb, |
| 1892 | mhi->host_addr.data_base_msb); |
| 1893 | |
| 1894 | addr1 = HOST_ADDR(mhi->host_addr.ctrl_limit_lsb, |
| 1895 | mhi->host_addr.ctrl_limit_msb); |
| 1896 | mhi->ctrl_base.size = addr1 - mhi->ctrl_base.host_pa; |
| 1897 | addr1 = HOST_ADDR(mhi->host_addr.data_limit_lsb, |
| 1898 | mhi->host_addr.data_limit_msb); |
| 1899 | mhi->data_base.size = addr1 - mhi->data_base.host_pa; |
| 1900 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1901 | if (mhi->config_iatu) { |
| 1902 | if (mhi->ctrl_base.host_pa > mhi->data_base.host_pa) { |
| 1903 | mhi->data_base.device_pa = mhi->device_local_pa_base; |
| 1904 | mhi->ctrl_base.device_pa = mhi->device_local_pa_base + |
| 1905 | mhi->ctrl_base.host_pa - mhi->data_base.host_pa; |
| 1906 | } else { |
| 1907 | mhi->ctrl_base.device_pa = mhi->device_local_pa_base; |
| 1908 | mhi->data_base.device_pa = mhi->device_local_pa_base + |
| 1909 | mhi->data_base.host_pa - mhi->ctrl_base.host_pa; |
| 1910 | } |
| 1911 | |
| 1912 | if (!mhi->use_ipa) { |
| 1913 | mhi->ctrl_base.device_va = |
| 1914 | (uintptr_t) devm_ioremap_nocache(&pdev->dev, |
| 1915 | mhi->ctrl_base.device_pa, |
| 1916 | mhi->ctrl_base.size); |
| 1917 | if (!mhi->ctrl_base.device_va) { |
| 1918 | pr_err("io remap failed for mhi address\n"); |
| 1919 | return -EINVAL; |
| 1920 | } |
| 1921 | } |
| 1922 | } |
| 1923 | |
| 1924 | if (mhi->config_iatu) { |
| 1925 | rc = mhi_dev_config_outbound_iatu(mhi); |
| 1926 | if (rc) { |
| 1927 | pr_err("Configuring iATU failed\n"); |
| 1928 | return rc; |
| 1929 | } |
| 1930 | } |
| 1931 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1932 | /* Get Channel, event and command context base pointer */ |
| 1933 | rc = mhi_dev_mmio_get_chc_base(mhi); |
| 1934 | if (rc) { |
| 1935 | pr_err("Fetching channel context failed\n"); |
| 1936 | return rc; |
| 1937 | } |
| 1938 | |
| 1939 | rc = mhi_dev_mmio_get_erc_base(mhi); |
| 1940 | if (rc) { |
| 1941 | pr_err("Fetching event ring context failed\n"); |
| 1942 | return rc; |
| 1943 | } |
| 1944 | |
| 1945 | rc = mhi_dev_mmio_get_crc_base(mhi); |
| 1946 | if (rc) { |
| 1947 | pr_err("Fetching command ring context failed\n"); |
| 1948 | return rc; |
| 1949 | } |
| 1950 | |
| 1951 | rc = mhi_dev_update_ner(mhi); |
| 1952 | if (rc) { |
| 1953 | pr_err("Fetching NER failed\n"); |
| 1954 | return rc; |
| 1955 | } |
| 1956 | |
| 1957 | mhi->cmd_ctx_shadow.size = sizeof(struct mhi_dev_cmd_ctx); |
| 1958 | mhi->ev_ctx_shadow.size = sizeof(struct mhi_dev_ev_ctx) * |
| 1959 | mhi->cfg.event_rings; |
| 1960 | mhi->ch_ctx_shadow.size = sizeof(struct mhi_dev_ch_ctx) * |
| 1961 | mhi->cfg.channels; |
| 1962 | |
| 1963 | mhi->cmd_ctx_cache = dma_alloc_coherent(&pdev->dev, |
| 1964 | sizeof(struct mhi_dev_cmd_ctx), |
| 1965 | &mhi->cmd_ctx_cache_dma_handle, |
| 1966 | GFP_KERNEL); |
| 1967 | if (!mhi->cmd_ctx_cache) { |
| 1968 | pr_err("no memory while allocating cmd ctx\n"); |
| 1969 | return -ENOMEM; |
| 1970 | } |
| 1971 | memset(mhi->cmd_ctx_cache, 0, sizeof(struct mhi_dev_cmd_ctx)); |
| 1972 | |
| 1973 | mhi->ev_ctx_cache = dma_alloc_coherent(&pdev->dev, |
| 1974 | sizeof(struct mhi_dev_ev_ctx) * |
| 1975 | mhi->cfg.event_rings, |
| 1976 | &mhi->ev_ctx_cache_dma_handle, |
| 1977 | GFP_KERNEL); |
| 1978 | if (!mhi->ev_ctx_cache) |
| 1979 | return -ENOMEM; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1980 | memset(mhi->ev_ctx_cache, 0, sizeof(struct mhi_dev_ev_ctx) * |
| 1981 | mhi->cfg.event_rings); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1982 | |
| 1983 | mhi->ch_ctx_cache = dma_alloc_coherent(&pdev->dev, |
| 1984 | sizeof(struct mhi_dev_ch_ctx) * |
| 1985 | mhi->cfg.channels, |
| 1986 | &mhi->ch_ctx_cache_dma_handle, |
| 1987 | GFP_KERNEL); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1988 | if (!mhi->ch_ctx_cache) |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1989 | return -ENOMEM; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 1990 | memset(mhi->ch_ctx_cache, 0, sizeof(struct mhi_dev_ch_ctx) * |
| 1991 | mhi->cfg.channels); |
| 1992 | |
| 1993 | if (mhi->use_ipa) { |
| 1994 | data_transfer.phy_addr = mhi->cmd_ctx_cache_dma_handle; |
| 1995 | data_transfer.host_pa = mhi->cmd_ctx_shadow.host_pa; |
| 1996 | } |
| 1997 | |
| 1998 | data_transfer.size = mhi->cmd_ctx_shadow.size; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 1999 | |
| 2000 | /* Cache the command and event context */ |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2001 | mhi_dev_read_from_host(mhi, &data_transfer); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2002 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2003 | if (mhi->use_ipa) { |
| 2004 | data_transfer.phy_addr = mhi->ev_ctx_cache_dma_handle; |
| 2005 | data_transfer.host_pa = mhi->ev_ctx_shadow.host_pa; |
| 2006 | } |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2007 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2008 | data_transfer.size = mhi->ev_ctx_shadow.size; |
| 2009 | |
| 2010 | mhi_dev_read_from_host(mhi, &data_transfer); |
| 2011 | |
| 2012 | mhi_log(MHI_MSG_VERBOSE, |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2013 | "cmd ring_base:0x%llx, rp:0x%llx, wp:0x%llx\n", |
| 2014 | mhi->cmd_ctx_cache->rbase, |
| 2015 | mhi->cmd_ctx_cache->rp, |
| 2016 | mhi->cmd_ctx_cache->wp); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2017 | mhi_log(MHI_MSG_VERBOSE, |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2018 | "ev ring_base:0x%llx, rp:0x%llx, wp:0x%llx\n", |
| 2019 | mhi_ctx->ev_ctx_cache->rbase, |
| 2020 | mhi->ev_ctx_cache->rp, |
| 2021 | mhi->ev_ctx_cache->wp); |
| 2022 | |
| 2023 | rc = mhi_ring_start(&mhi->ring[0], |
| 2024 | (union mhi_dev_ring_ctx *)mhi->cmd_ctx_cache, mhi); |
| 2025 | if (rc) { |
| 2026 | pr_err("error in ring start\n"); |
| 2027 | return rc; |
| 2028 | } |
| 2029 | |
| 2030 | return 0; |
| 2031 | } |
| 2032 | |
| 2033 | int mhi_dev_suspend(struct mhi_dev *mhi) |
| 2034 | { |
| 2035 | int ch_id = 0, rc = 0; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2036 | struct mhi_addr data_transfer; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2037 | |
| 2038 | mutex_lock(&mhi_ctx->mhi_write_test); |
| 2039 | atomic_set(&mhi->is_suspended, 1); |
| 2040 | |
| 2041 | for (ch_id = 0; ch_id < mhi->cfg.channels; ch_id++) { |
| 2042 | if (mhi->ch_ctx_cache[ch_id].ch_state != |
| 2043 | MHI_DEV_CH_STATE_RUNNING) |
| 2044 | continue; |
| 2045 | |
| 2046 | mhi->ch_ctx_cache[ch_id].ch_state = MHI_DEV_CH_STATE_SUSPENDED; |
| 2047 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2048 | if (mhi->use_ipa) { |
| 2049 | data_transfer.host_pa = mhi->ch_ctx_shadow.host_pa + |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2050 | sizeof(struct mhi_dev_ch_ctx) * ch_id; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2051 | } else { |
| 2052 | data_transfer.device_va = mhi->ch_ctx_shadow.device_va + |
| 2053 | sizeof(struct mhi_dev_ch_ctx) * ch_id; |
| 2054 | data_transfer.device_pa = mhi->ch_ctx_shadow.device_pa + |
| 2055 | sizeof(struct mhi_dev_ch_ctx) * ch_id; |
| 2056 | } |
| 2057 | |
| 2058 | data_transfer.size = sizeof(enum mhi_dev_ch_ctx_state); |
| 2059 | data_transfer.virt_addr = &mhi->ch_ctx_cache[ch_id].ch_state; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2060 | |
| 2061 | /* update the channel state in the host */ |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2062 | mhi_dev_write_to_host(mhi, &data_transfer, NULL, |
| 2063 | MHI_DEV_DMA_SYNC); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2064 | |
| 2065 | } |
| 2066 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2067 | atomic_set(&mhi->mhi_dev_wake, 0); |
| 2068 | pm_relax(mhi->dev); |
| 2069 | mhi_log(MHI_MSG_VERBOSE, "releasing mhi wakelock\n"); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2070 | |
| 2071 | mutex_unlock(&mhi_ctx->mhi_write_test); |
| 2072 | |
| 2073 | return rc; |
| 2074 | } |
| 2075 | EXPORT_SYMBOL(mhi_dev_suspend); |
| 2076 | |
| 2077 | int mhi_dev_resume(struct mhi_dev *mhi) |
| 2078 | { |
| 2079 | int ch_id = 0, rc = 0; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2080 | struct mhi_addr data_transfer; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2081 | |
| 2082 | for (ch_id = 0; ch_id < mhi->cfg.channels; ch_id++) { |
| 2083 | if (mhi->ch_ctx_cache[ch_id].ch_state != |
| 2084 | MHI_DEV_CH_STATE_SUSPENDED) |
| 2085 | continue; |
| 2086 | |
| 2087 | mhi->ch_ctx_cache[ch_id].ch_state = MHI_DEV_CH_STATE_RUNNING; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2088 | if (mhi->use_ipa) { |
| 2089 | data_transfer.host_pa = mhi->ch_ctx_shadow.host_pa + |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2090 | sizeof(struct mhi_dev_ch_ctx) * ch_id; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2091 | } else { |
| 2092 | data_transfer.device_va = mhi->ch_ctx_shadow.device_va + |
| 2093 | sizeof(struct mhi_dev_ch_ctx) * ch_id; |
| 2094 | data_transfer.device_pa = mhi->ch_ctx_shadow.device_pa + |
| 2095 | sizeof(struct mhi_dev_ch_ctx) * ch_id; |
| 2096 | } |
| 2097 | |
| 2098 | data_transfer.size = sizeof(enum mhi_dev_ch_ctx_state); |
| 2099 | data_transfer.virt_addr = &mhi->ch_ctx_cache[ch_id].ch_state; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2100 | |
| 2101 | /* update the channel state in the host */ |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2102 | mhi_dev_write_to_host(mhi, &data_transfer, NULL, |
| 2103 | MHI_DEV_DMA_SYNC); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2104 | } |
Siddartha Mohanadoss | ba314f2 | 2018-03-19 15:43:50 -0700 | [diff] [blame] | 2105 | mhi_update_state_info(MHI_DEV_UEVENT_CTRL, MHI_STATE_CONNECTED); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2106 | |
| 2107 | atomic_set(&mhi->is_suspended, 0); |
| 2108 | |
| 2109 | return rc; |
| 2110 | } |
| 2111 | EXPORT_SYMBOL(mhi_dev_resume); |
| 2112 | |
| 2113 | static int mhi_dev_ring_init(struct mhi_dev *dev) |
| 2114 | { |
| 2115 | int i = 0; |
| 2116 | |
| 2117 | mhi_log(MHI_MSG_INFO, "initializing all rings"); |
| 2118 | dev->cmd_ring_idx = 0; |
| 2119 | dev->ev_ring_start = 1; |
| 2120 | dev->ch_ring_start = dev->ev_ring_start + dev->cfg.event_rings; |
| 2121 | |
| 2122 | /* Initialize CMD ring */ |
| 2123 | mhi_ring_init(&dev->ring[dev->cmd_ring_idx], |
| 2124 | RING_TYPE_CMD, dev->cmd_ring_idx); |
| 2125 | |
| 2126 | mhi_ring_set_cb(&dev->ring[dev->cmd_ring_idx], |
| 2127 | mhi_dev_process_cmd_ring); |
| 2128 | |
| 2129 | /* Initialize Event ring */ |
| 2130 | for (i = dev->ev_ring_start; i < (dev->cfg.event_rings |
| 2131 | + dev->ev_ring_start); i++) |
| 2132 | mhi_ring_init(&dev->ring[i], RING_TYPE_ER, i); |
| 2133 | |
| 2134 | /* Initialize CH */ |
| 2135 | for (i = dev->ch_ring_start; i < (dev->cfg.channels |
| 2136 | + dev->ch_ring_start); i++) { |
| 2137 | mhi_ring_init(&dev->ring[i], RING_TYPE_CH, i); |
| 2138 | mhi_ring_set_cb(&dev->ring[i], mhi_dev_process_tre_ring); |
| 2139 | } |
| 2140 | |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 2141 | return 0; |
| 2142 | } |
| 2143 | |
| 2144 | static uint32_t mhi_dev_get_evt_ring_size(struct mhi_dev *mhi, uint32_t ch_id) |
| 2145 | { |
| 2146 | uint32_t info; |
| 2147 | int rc; |
| 2148 | |
| 2149 | /* If channel was started by host, get event ring size */ |
| 2150 | rc = mhi_ctrl_state_info(ch_id, &info); |
| 2151 | if (rc || (info != MHI_STATE_CONNECTED)) |
| 2152 | return NUM_TR_EVENTS_DEFAULT; |
| 2153 | |
| 2154 | return mhi->ring[mhi->ev_ring_start + |
| 2155 | mhi->ch_ctx_cache[ch_id].err_indx].ring_size; |
| 2156 | } |
| 2157 | |
| 2158 | static int mhi_dev_alloc_evt_buf_evt_req(struct mhi_dev *mhi, |
| 2159 | struct mhi_dev_channel *ch, struct mhi_dev_ring *evt_ring) |
| 2160 | { |
| 2161 | int rc; |
| 2162 | uint32_t size, i; |
| 2163 | |
| 2164 | if (evt_ring) |
| 2165 | size = evt_ring->ring_size; |
| 2166 | else |
| 2167 | size = mhi_dev_get_evt_ring_size(mhi, ch->ch_id); |
| 2168 | |
| 2169 | if (!size) { |
| 2170 | mhi_log(MHI_MSG_ERROR, |
| 2171 | "Evt buf size is 0 for channel %d", ch->ch_id); |
| 2172 | return -EINVAL; |
| 2173 | } |
| 2174 | |
| 2175 | /* Previous allocated evt buf size matches requested size */ |
| 2176 | if (size == ch->evt_buf_size) |
| 2177 | return 0; |
| 2178 | |
| 2179 | /* |
| 2180 | * Either evt buf and evt reqs were not allocated yet or |
| 2181 | * they were allocated with a different size |
| 2182 | */ |
| 2183 | if (ch->evt_buf_size) { |
| 2184 | kfree(ch->ereqs); |
| 2185 | kfree(ch->tr_events); |
| 2186 | } |
| 2187 | /* |
| 2188 | * Set number of event flush req buffers equal to size of |
| 2189 | * event buf since in the worst case we may need to flush |
| 2190 | * every event ring element individually |
| 2191 | */ |
| 2192 | ch->evt_buf_size = size; |
| 2193 | ch->evt_req_size = size; |
| 2194 | |
| 2195 | mhi_log(MHI_MSG_INFO, |
| 2196 | "Channel %d evt buf size is %d\n", ch->ch_id, ch->evt_buf_size); |
| 2197 | |
| 2198 | /* Allocate event requests */ |
| 2199 | ch->ereqs = kcalloc(ch->evt_req_size, sizeof(*ch->ereqs), GFP_KERNEL); |
| 2200 | if (!ch->ereqs) |
| 2201 | return -ENOMEM; |
| 2202 | |
| 2203 | /* Allocate buffers to queue transfer completion events */ |
| 2204 | ch->tr_events = kcalloc(ch->evt_buf_size, sizeof(*ch->tr_events), |
| 2205 | GFP_KERNEL); |
| 2206 | if (!ch->tr_events) { |
| 2207 | rc = -ENOMEM; |
| 2208 | goto free_ereqs; |
| 2209 | } |
| 2210 | |
| 2211 | /* Organize event flush requests into a linked list */ |
| 2212 | INIT_LIST_HEAD(&ch->event_req_buffers); |
| 2213 | INIT_LIST_HEAD(&ch->flush_event_req_buffers); |
| 2214 | for (i = 0; i < ch->evt_req_size; ++i) |
| 2215 | list_add_tail(&ch->ereqs[i].list, &ch->event_req_buffers); |
| 2216 | |
| 2217 | ch->curr_ereq = |
| 2218 | container_of(ch->event_req_buffers.next, |
| 2219 | struct event_req, list); |
| 2220 | list_del_init(&ch->curr_ereq->list); |
| 2221 | ch->curr_ereq->start = 0; |
| 2222 | |
| 2223 | /* |
| 2224 | * Initialize cmpl event buffer indexes - evt_buf_rp and |
| 2225 | * evt_buf_wp point to the first and last free index available. |
| 2226 | */ |
| 2227 | ch->evt_buf_rp = 0; |
| 2228 | ch->evt_buf_wp = ch->evt_buf_size - 1; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2229 | |
| 2230 | return 0; |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 2231 | |
| 2232 | free_ereqs: |
| 2233 | kfree(ch->ereqs); |
| 2234 | ch->ereqs = NULL; |
| 2235 | ch->evt_buf_size = 0; |
| 2236 | ch->evt_req_size = 0; |
| 2237 | |
| 2238 | return rc; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2239 | } |
| 2240 | |
| 2241 | int mhi_dev_open_channel(uint32_t chan_id, |
| 2242 | struct mhi_dev_client **handle_client, |
| 2243 | void (*mhi_dev_client_cb_reason) |
| 2244 | (struct mhi_dev_client_cb_reason *cb)) |
| 2245 | { |
| 2246 | int rc = 0; |
| 2247 | struct mhi_dev_channel *ch; |
| 2248 | struct platform_device *pdev; |
| 2249 | |
| 2250 | pdev = mhi_ctx->pdev; |
| 2251 | ch = &mhi_ctx->ch[chan_id]; |
| 2252 | |
| 2253 | mutex_lock(&ch->ch_lock); |
| 2254 | |
| 2255 | if (ch->active_client) { |
| 2256 | mhi_log(MHI_MSG_ERROR, |
| 2257 | "Channel (%d) already opened by client\n", chan_id); |
| 2258 | rc = -EINVAL; |
| 2259 | goto exit; |
| 2260 | } |
| 2261 | |
| 2262 | /* Initialize the channel, client and state information */ |
| 2263 | *handle_client = kzalloc(sizeof(struct mhi_dev_client), GFP_KERNEL); |
| 2264 | if (!(*handle_client)) { |
| 2265 | dev_err(&pdev->dev, "can not allocate mhi_dev memory\n"); |
| 2266 | rc = -ENOMEM; |
| 2267 | goto exit; |
| 2268 | } |
| 2269 | |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 2270 | rc = mhi_dev_alloc_evt_buf_evt_req(mhi_ctx, ch, NULL); |
| 2271 | if (rc) |
Siva Kumar Akkireddi | 6c694d3 | 2018-06-01 20:22:30 +0530 | [diff] [blame] | 2272 | goto free_client; |
Siva Kumar Akkireddi | 6c694d3 | 2018-06-01 20:22:30 +0530 | [diff] [blame] | 2273 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2274 | ch->active_client = (*handle_client); |
| 2275 | (*handle_client)->channel = ch; |
| 2276 | (*handle_client)->event_trigger = mhi_dev_client_cb_reason; |
| 2277 | |
| 2278 | if (ch->state == MHI_DEV_CH_UNINT) { |
| 2279 | ch->ring = &mhi_ctx->ring[chan_id + mhi_ctx->ch_ring_start]; |
| 2280 | ch->state = MHI_DEV_CH_PENDING_START; |
| 2281 | } else if (ch->state == MHI_DEV_CH_CLOSED) |
| 2282 | ch->state = MHI_DEV_CH_STARTED; |
| 2283 | else if (ch->state == MHI_DEV_CH_STOPPED) |
| 2284 | ch->state = MHI_DEV_CH_PENDING_START; |
| 2285 | |
Siva Kumar Akkireddi | 6c694d3 | 2018-06-01 20:22:30 +0530 | [diff] [blame] | 2286 | goto exit; |
| 2287 | |
Siva Kumar Akkireddi | 6c694d3 | 2018-06-01 20:22:30 +0530 | [diff] [blame] | 2288 | free_client: |
| 2289 | kfree(*handle_client); |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 2290 | *handle_client = NULL; |
| 2291 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2292 | exit: |
| 2293 | mutex_unlock(&ch->ch_lock); |
| 2294 | return rc; |
| 2295 | } |
| 2296 | EXPORT_SYMBOL(mhi_dev_open_channel); |
| 2297 | |
| 2298 | int mhi_dev_channel_isempty(struct mhi_dev_client *handle) |
| 2299 | { |
| 2300 | struct mhi_dev_channel *ch; |
| 2301 | int rc; |
| 2302 | |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 2303 | if (!handle) { |
| 2304 | mhi_log(MHI_MSG_ERROR, "Invalid channel access\n"); |
| 2305 | return -EINVAL; |
| 2306 | } |
| 2307 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2308 | ch = handle->channel; |
Siva Kumar Akkireddi | ad59887 | 2018-12-03 19:17:54 +0530 | [diff] [blame] | 2309 | if (!ch) |
| 2310 | return -EINVAL; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2311 | |
| 2312 | rc = ch->ring->rd_offset == ch->ring->wr_offset; |
| 2313 | |
| 2314 | return rc; |
| 2315 | } |
| 2316 | EXPORT_SYMBOL(mhi_dev_channel_isempty); |
| 2317 | |
Siva Kumar Akkireddi | 0f82ea3 | 2019-11-11 14:56:01 +0530 | [diff] [blame] | 2318 | bool mhi_dev_channel_has_pending_write(struct mhi_dev_client *handle) |
| 2319 | { |
| 2320 | struct mhi_dev_channel *ch; |
| 2321 | |
| 2322 | if (!handle) { |
| 2323 | mhi_log(MHI_MSG_ERROR, "Invalid channel access\n"); |
| 2324 | return -EINVAL; |
| 2325 | } |
| 2326 | |
| 2327 | ch = handle->channel; |
| 2328 | if (!ch) |
| 2329 | return -EINVAL; |
| 2330 | |
| 2331 | return ch->pend_wr_count ? true : false; |
| 2332 | } |
| 2333 | EXPORT_SYMBOL(mhi_dev_channel_has_pending_write); |
| 2334 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2335 | int mhi_dev_close_channel(struct mhi_dev_client *handle) |
| 2336 | { |
| 2337 | struct mhi_dev_channel *ch; |
Siva Kumar Akkireddi | 0f82ea3 | 2019-11-11 14:56:01 +0530 | [diff] [blame] | 2338 | int count = 0; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2339 | int rc = 0; |
| 2340 | |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 2341 | if (!handle) { |
| 2342 | mhi_log(MHI_MSG_ERROR, "Invalid channel access:%d\n", -ENODEV); |
| 2343 | return -EINVAL; |
| 2344 | } |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2345 | ch = handle->channel; |
| 2346 | |
Siva Kumar Akkireddi | 0f82ea3 | 2019-11-11 14:56:01 +0530 | [diff] [blame] | 2347 | do { |
| 2348 | if (ch->pend_wr_count) { |
| 2349 | usleep_range(MHI_DEV_CH_CLOSE_TIMEOUT_MIN, |
| 2350 | MHI_DEV_CH_CLOSE_TIMEOUT_MAX); |
| 2351 | } else |
| 2352 | break; |
| 2353 | } while (++count < MHI_DEV_CH_CLOSE_TIMEOUT_COUNT); |
| 2354 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2355 | mutex_lock(&ch->ch_lock); |
Siva Kumar Akkireddi | 0f82ea3 | 2019-11-11 14:56:01 +0530 | [diff] [blame] | 2356 | |
| 2357 | if (ch->pend_wr_count) |
| 2358 | mhi_log(MHI_MSG_ERROR, "%d writes pending for channel %d\n", |
| 2359 | ch->pend_wr_count, ch->ch_id); |
| 2360 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2361 | if (ch->state != MHI_DEV_CH_PENDING_START) { |
Siva Kumar Akkireddi | 0f82ea3 | 2019-11-11 14:56:01 +0530 | [diff] [blame] | 2362 | if ((ch->ch_type == MHI_DEV_CH_TYPE_OUTBOUND_CHANNEL && |
| 2363 | !mhi_dev_channel_isempty(handle)) || ch->tre_loc) { |
| 2364 | mhi_log(MHI_MSG_DBG, |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2365 | "Trying to close an active channel (%d)\n", |
| 2366 | ch->ch_id); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2367 | rc = -EAGAIN; |
| 2368 | goto exit; |
| 2369 | } else if (ch->tre_loc) { |
| 2370 | mhi_log(MHI_MSG_ERROR, |
| 2371 | "Trying to close channel (%d) when a TRE is active", |
| 2372 | ch->ch_id); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2373 | rc = -EAGAIN; |
| 2374 | goto exit; |
| 2375 | } |
| 2376 | } |
| 2377 | |
| 2378 | ch->state = MHI_DEV_CH_CLOSED; |
| 2379 | ch->active_client = NULL; |
Siva Kumar Akkireddi | 6c694d3 | 2018-06-01 20:22:30 +0530 | [diff] [blame] | 2380 | kfree(ch->ereqs); |
| 2381 | kfree(ch->tr_events); |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 2382 | ch->evt_buf_size = 0; |
| 2383 | ch->evt_req_size = 0; |
Siva Kumar Akkireddi | 6c694d3 | 2018-06-01 20:22:30 +0530 | [diff] [blame] | 2384 | ch->ereqs = NULL; |
| 2385 | ch->tr_events = NULL; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2386 | kfree(handle); |
| 2387 | exit: |
| 2388 | mutex_unlock(&ch->ch_lock); |
| 2389 | return rc; |
| 2390 | } |
| 2391 | EXPORT_SYMBOL(mhi_dev_close_channel); |
| 2392 | |
| 2393 | static int mhi_dev_check_tre_bytes_left(struct mhi_dev_channel *ch, |
| 2394 | struct mhi_dev_ring *ring, union mhi_dev_ring_element_type *el, |
| 2395 | uint32_t *chain) |
| 2396 | { |
| 2397 | uint32_t td_done = 0; |
| 2398 | |
| 2399 | /* |
| 2400 | * A full TRE worth of data was consumed. |
| 2401 | * Check if we are at a TD boundary. |
| 2402 | */ |
| 2403 | if (ch->tre_bytes_left == 0) { |
| 2404 | if (el->tre.chain) { |
| 2405 | if (el->tre.ieob) |
| 2406 | mhi_dev_send_completion_event(ch, |
| 2407 | ring->rd_offset, el->tre.len, |
| 2408 | MHI_CMD_COMPL_CODE_EOB); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2409 | *chain = 1; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2410 | } else { |
| 2411 | if (el->tre.ieot) |
| 2412 | mhi_dev_send_completion_event( |
| 2413 | ch, ring->rd_offset, el->tre.len, |
| 2414 | MHI_CMD_COMPL_CODE_EOT); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2415 | td_done = 1; |
| 2416 | *chain = 0; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2417 | } |
| 2418 | mhi_dev_ring_inc_index(ring, ring->rd_offset); |
| 2419 | ch->tre_bytes_left = 0; |
| 2420 | ch->tre_loc = 0; |
| 2421 | } |
| 2422 | |
| 2423 | return td_done; |
| 2424 | } |
| 2425 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2426 | int mhi_dev_read_channel(struct mhi_req *mreq) |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2427 | { |
| 2428 | struct mhi_dev_channel *ch; |
| 2429 | struct mhi_dev_ring *ring; |
| 2430 | union mhi_dev_ring_element_type *el; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2431 | size_t bytes_to_read, addr_offset; |
| 2432 | uint64_t read_from_loc; |
| 2433 | ssize_t bytes_read = 0; |
| 2434 | uint32_t write_to_loc = 0; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2435 | size_t usr_buf_remaining; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2436 | int td_done = 0, rc = 0; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2437 | struct mhi_dev_client *handle_client; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2438 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2439 | if (!mreq) { |
| 2440 | mhi_log(MHI_MSG_ERROR, "invalid mhi request\n"); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2441 | return -ENXIO; |
| 2442 | } |
| 2443 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2444 | if (mhi_ctx->ctrl_info != MHI_STATE_CONNECTED) { |
| 2445 | pr_err("Channel not connected:%d\n", mhi_ctx->ctrl_info); |
| 2446 | return -ENODEV; |
| 2447 | } |
| 2448 | |
| 2449 | if (!mreq->client) { |
| 2450 | mhi_log(MHI_MSG_ERROR, "invalid mhi request\n"); |
| 2451 | return -ENXIO; |
| 2452 | } |
| 2453 | handle_client = mreq->client; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2454 | ch = handle_client->channel; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2455 | usr_buf_remaining = mreq->len; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2456 | ring = ch->ring; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2457 | mreq->chain = 0; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2458 | |
| 2459 | mutex_lock(&ch->ch_lock); |
| 2460 | |
| 2461 | do { |
| 2462 | el = &ring->ring_cache[ring->rd_offset]; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2463 | mhi_log(MHI_MSG_VERBOSE, "evtptr : 0x%llx\n", |
| 2464 | el->tre.data_buf_ptr); |
| 2465 | mhi_log(MHI_MSG_VERBOSE, "evntlen : 0x%x, offset:%d\n", |
| 2466 | el->tre.len, ring->rd_offset); |
| 2467 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2468 | if (ch->tre_loc) { |
| 2469 | bytes_to_read = min(usr_buf_remaining, |
| 2470 | ch->tre_bytes_left); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2471 | mreq->chain = 1; |
| 2472 | mhi_log(MHI_MSG_VERBOSE, |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2473 | "remaining buffered data size %d\n", |
| 2474 | (int) ch->tre_bytes_left); |
| 2475 | } else { |
| 2476 | if (ring->rd_offset == ring->wr_offset) { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2477 | mhi_log(MHI_MSG_VERBOSE, |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2478 | "nothing to read, returning\n"); |
| 2479 | bytes_read = 0; |
| 2480 | goto exit; |
| 2481 | } |
| 2482 | |
| 2483 | if (ch->state == MHI_DEV_CH_STOPPED) { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2484 | mhi_log(MHI_MSG_VERBOSE, |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2485 | "channel (%d) already stopped\n", |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2486 | mreq->chan); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2487 | bytes_read = -1; |
| 2488 | goto exit; |
| 2489 | } |
| 2490 | |
| 2491 | ch->tre_loc = el->tre.data_buf_ptr; |
| 2492 | ch->tre_size = el->tre.len; |
| 2493 | ch->tre_bytes_left = ch->tre_size; |
| 2494 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2495 | mhi_log(MHI_MSG_VERBOSE, |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2496 | "user_buf_remaining %d, ch->tre_size %d\n", |
| 2497 | usr_buf_remaining, ch->tre_size); |
| 2498 | bytes_to_read = min(usr_buf_remaining, ch->tre_size); |
| 2499 | } |
| 2500 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2501 | bytes_read += bytes_to_read; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2502 | addr_offset = ch->tre_size - ch->tre_bytes_left; |
| 2503 | read_from_loc = ch->tre_loc + addr_offset; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2504 | write_to_loc = (uint32_t) mreq->buf + |
| 2505 | (mreq->len - usr_buf_remaining); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2506 | ch->tre_bytes_left -= bytes_to_read; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2507 | mreq->el = el; |
Siva Kumar Akkireddi | fc10c67 | 2018-09-27 13:15:02 +0530 | [diff] [blame] | 2508 | mreq->transfer_len = bytes_to_read; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2509 | mreq->rd_offset = ring->rd_offset; |
| 2510 | mhi_log(MHI_MSG_VERBOSE, "reading %d bytes from chan %d\n", |
| 2511 | bytes_to_read, mreq->chan); |
| 2512 | rc = mhi_transfer_host_to_device((void *) write_to_loc, |
| 2513 | read_from_loc, bytes_to_read, mhi_ctx, mreq); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2514 | if (rc) { |
| 2515 | mhi_log(MHI_MSG_ERROR, |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2516 | "Error while reading chan (%d) rc %d\n", |
| 2517 | mreq->chan, rc); |
| 2518 | mutex_unlock(&ch->ch_lock); |
| 2519 | return rc; |
| 2520 | } |
| 2521 | usr_buf_remaining -= bytes_to_read; |
| 2522 | |
| 2523 | if (mreq->mode == IPA_DMA_ASYNC) { |
| 2524 | ch->tre_bytes_left = 0; |
| 2525 | ch->tre_loc = 0; |
| 2526 | goto exit; |
| 2527 | } else { |
| 2528 | td_done = mhi_dev_check_tre_bytes_left(ch, ring, |
| 2529 | el, &mreq->chain); |
| 2530 | } |
| 2531 | } while (usr_buf_remaining && !td_done); |
| 2532 | if (td_done && ch->state == MHI_DEV_CH_PENDING_STOP) { |
| 2533 | ch->state = MHI_DEV_CH_STOPPED; |
| 2534 | rc = mhi_dev_process_stop_cmd(ring, mreq->chan, mhi_ctx); |
| 2535 | if (rc) { |
| 2536 | mhi_log(MHI_MSG_ERROR, |
| 2537 | "Error while stopping channel (%d)\n", |
| 2538 | mreq->chan); |
| 2539 | bytes_read = -EIO; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2540 | } |
| 2541 | } |
| 2542 | exit: |
| 2543 | mutex_unlock(&ch->ch_lock); |
| 2544 | return bytes_read; |
| 2545 | } |
| 2546 | EXPORT_SYMBOL(mhi_dev_read_channel); |
| 2547 | |
| 2548 | static void skip_to_next_td(struct mhi_dev_channel *ch) |
| 2549 | { |
| 2550 | struct mhi_dev_ring *ring = ch->ring; |
| 2551 | union mhi_dev_ring_element_type *el; |
| 2552 | uint32_t td_boundary_reached = 0; |
| 2553 | |
| 2554 | ch->skip_td = 1; |
| 2555 | el = &ring->ring_cache[ring->rd_offset]; |
| 2556 | while (ring->rd_offset != ring->wr_offset) { |
| 2557 | if (td_boundary_reached) { |
| 2558 | ch->skip_td = 0; |
| 2559 | break; |
| 2560 | } |
| 2561 | if (!el->tre.chain) |
| 2562 | td_boundary_reached = 1; |
| 2563 | mhi_dev_ring_inc_index(ring, ring->rd_offset); |
| 2564 | el = &ring->ring_cache[ring->rd_offset]; |
| 2565 | } |
| 2566 | } |
| 2567 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2568 | int mhi_dev_write_channel(struct mhi_req *wreq) |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2569 | { |
| 2570 | struct mhi_dev_channel *ch; |
| 2571 | struct mhi_dev_ring *ring; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2572 | struct mhi_dev_client *handle_client; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2573 | union mhi_dev_ring_element_type *el; |
| 2574 | enum mhi_dev_cmd_completion_code code = MHI_CMD_COMPL_CODE_INVALID; |
| 2575 | int rc = 0; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2576 | uint64_t skip_tres = 0, write_to_loc; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2577 | uint32_t read_from_loc; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2578 | size_t usr_buf_remaining; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2579 | size_t usr_buf_offset = 0; |
| 2580 | size_t bytes_to_write = 0; |
| 2581 | size_t bytes_written = 0; |
| 2582 | uint32_t tre_len = 0, suspend_wait_timeout = 0; |
Siva Kumar Akkireddi | 0f82ea3 | 2019-11-11 14:56:01 +0530 | [diff] [blame] | 2583 | bool async_wr_sched = false; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2584 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2585 | if (!wreq || !wreq->client || !wreq->buf) { |
| 2586 | pr_err("%s: invalid parameters\n", __func__); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2587 | return -ENXIO; |
| 2588 | } |
| 2589 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2590 | if (mhi_ctx->ctrl_info != MHI_STATE_CONNECTED) { |
| 2591 | pr_err("Channel not connected:%d\n", mhi_ctx->ctrl_info); |
| 2592 | return -ENODEV; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2593 | } |
| 2594 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2595 | usr_buf_remaining = wreq->len; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2596 | mutex_lock(&mhi_ctx->mhi_write_test); |
| 2597 | |
| 2598 | if (atomic_read(&mhi_ctx->is_suspended)) { |
| 2599 | /* |
| 2600 | * Expected usage is when there is a write |
| 2601 | * to the MHI core -> notify SM. |
| 2602 | */ |
| 2603 | rc = mhi_dev_notify_sm_event(MHI_DEV_EVENT_CORE_WAKEUP); |
| 2604 | if (rc) { |
| 2605 | pr_err("error sending core wakeup event\n"); |
| 2606 | mutex_unlock(&mhi_ctx->mhi_write_test); |
| 2607 | return rc; |
| 2608 | } |
| 2609 | } |
| 2610 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2611 | while (atomic_read(&mhi_ctx->is_suspended) && |
Siddartha Mohanadoss | 1a1d8f0 | 2018-04-02 19:52:35 -0700 | [diff] [blame] | 2612 | suspend_wait_timeout < MHI_WAKEUP_TIMEOUT_CNT) { |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2613 | /* wait for the suspend to finish */ |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2614 | msleep(MHI_SUSPEND_MIN); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2615 | suspend_wait_timeout++; |
| 2616 | } |
Siddartha Mohanadoss | 1a1d8f0 | 2018-04-02 19:52:35 -0700 | [diff] [blame] | 2617 | |
| 2618 | if (suspend_wait_timeout >= MHI_WAKEUP_TIMEOUT_CNT || |
| 2619 | mhi_ctx->ctrl_info != MHI_STATE_CONNECTED) { |
| 2620 | pr_err("Failed to wake up core\n"); |
| 2621 | mutex_unlock(&mhi_ctx->mhi_write_test); |
| 2622 | return -ENODEV; |
| 2623 | } |
| 2624 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2625 | handle_client = wreq->client; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2626 | ch = handle_client->channel; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2627 | |
| 2628 | ring = ch->ring; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2629 | |
| 2630 | mutex_lock(&ch->ch_lock); |
| 2631 | |
Siva Kumar Akkireddi | 0f82ea3 | 2019-11-11 14:56:01 +0530 | [diff] [blame] | 2632 | ch->pend_wr_count++; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2633 | if (ch->state == MHI_DEV_CH_STOPPED) { |
| 2634 | mhi_log(MHI_MSG_ERROR, |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2635 | "channel %d already stopped\n", wreq->chan); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2636 | bytes_written = -1; |
| 2637 | goto exit; |
| 2638 | } |
| 2639 | |
| 2640 | if (ch->state == MHI_DEV_CH_PENDING_STOP) { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2641 | if (mhi_dev_process_stop_cmd(ring, wreq->chan, mhi_ctx) < 0) |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2642 | bytes_written = -1; |
| 2643 | goto exit; |
| 2644 | } |
| 2645 | |
| 2646 | if (ch->skip_td) |
| 2647 | skip_to_next_td(ch); |
| 2648 | |
| 2649 | do { |
| 2650 | if (ring->rd_offset == ring->wr_offset) { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2651 | mhi_log(MHI_MSG_ERROR, |
| 2652 | "%s():rd & wr offsets are equal\n", |
| 2653 | __func__); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2654 | mhi_log(MHI_MSG_INFO, "No TREs available\n"); |
| 2655 | break; |
| 2656 | } |
| 2657 | |
| 2658 | el = &ring->ring_cache[ring->rd_offset]; |
| 2659 | tre_len = el->tre.len; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2660 | if (wreq->len > tre_len) { |
| 2661 | pr_err("%s(): rlen = %d, tlen = %d: client buf > tre len\n", |
| 2662 | __func__, wreq->len, tre_len); |
| 2663 | bytes_written = -ENOMEM; |
| 2664 | goto exit; |
| 2665 | } |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2666 | |
| 2667 | bytes_to_write = min(usr_buf_remaining, tre_len); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2668 | usr_buf_offset = wreq->len - bytes_to_write; |
| 2669 | read_from_loc = (uint32_t) wreq->buf + usr_buf_offset; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2670 | write_to_loc = el->tre.data_buf_ptr; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2671 | wreq->rd_offset = ring->rd_offset; |
| 2672 | wreq->el = el; |
Siva Kumar Akkireddi | fc10c67 | 2018-09-27 13:15:02 +0530 | [diff] [blame] | 2673 | wreq->transfer_len = bytes_to_write; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2674 | rc = mhi_transfer_device_to_host(write_to_loc, |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2675 | (void *) read_from_loc, |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2676 | bytes_to_write, |
| 2677 | mhi_ctx, wreq); |
| 2678 | if (rc) { |
| 2679 | mhi_log(MHI_MSG_ERROR, |
| 2680 | "Error while writing chan (%d) rc %d\n", |
| 2681 | wreq->chan, rc); |
| 2682 | goto exit; |
Siva Kumar Akkireddi | 0f82ea3 | 2019-11-11 14:56:01 +0530 | [diff] [blame] | 2683 | } else if (wreq->mode == DMA_ASYNC) |
| 2684 | async_wr_sched = true; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2685 | bytes_written += bytes_to_write; |
| 2686 | usr_buf_remaining -= bytes_to_write; |
| 2687 | |
| 2688 | if (usr_buf_remaining) { |
| 2689 | if (!el->tre.chain) |
| 2690 | code = MHI_CMD_COMPL_CODE_OVERFLOW; |
| 2691 | else if (el->tre.ieob) |
| 2692 | code = MHI_CMD_COMPL_CODE_EOB; |
| 2693 | } else { |
| 2694 | if (el->tre.chain) |
| 2695 | skip_tres = 1; |
| 2696 | code = MHI_CMD_COMPL_CODE_EOT; |
| 2697 | } |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2698 | if (wreq->mode == IPA_DMA_SYNC) { |
| 2699 | rc = mhi_dev_send_completion_event(ch, |
| 2700 | ring->rd_offset, bytes_to_write, code); |
| 2701 | if (rc) |
| 2702 | mhi_log(MHI_MSG_VERBOSE, |
| 2703 | "err in snding cmpl evt ch:%d\n", |
| 2704 | wreq->chan); |
| 2705 | mhi_dev_ring_inc_index(ring, ring->rd_offset); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2706 | } |
| 2707 | |
| 2708 | if (ch->state == MHI_DEV_CH_PENDING_STOP) |
| 2709 | break; |
| 2710 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2711 | } while (!skip_tres && usr_buf_remaining); |
| 2712 | |
| 2713 | if (skip_tres) |
| 2714 | skip_to_next_td(ch); |
| 2715 | |
| 2716 | if (ch->state == MHI_DEV_CH_PENDING_STOP) { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2717 | rc = mhi_dev_process_stop_cmd(ring, wreq->chan, mhi_ctx); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2718 | if (rc) { |
| 2719 | mhi_log(MHI_MSG_ERROR, |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2720 | "channel %d stop failed\n", wreq->chan); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2721 | } |
| 2722 | } |
| 2723 | exit: |
Siva Kumar Akkireddi | 0f82ea3 | 2019-11-11 14:56:01 +0530 | [diff] [blame] | 2724 | if (wreq->mode == DMA_SYNC || !async_wr_sched) |
| 2725 | ch->pend_wr_count--; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2726 | mutex_unlock(&ch->ch_lock); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2727 | mutex_unlock(&mhi_ctx->mhi_write_test); |
| 2728 | return bytes_written; |
| 2729 | } |
| 2730 | EXPORT_SYMBOL(mhi_dev_write_channel); |
| 2731 | |
Rama Krishna Phani A | 090bbd1 | 2018-10-16 20:36:34 +0530 | [diff] [blame] | 2732 | static int mhi_dev_recover(struct mhi_dev *mhi) |
| 2733 | { |
| 2734 | int rc = 0; |
| 2735 | uint32_t syserr, max_cnt = 0, bhi_intvec = 0; |
Siddartha Mohanadoss | e81dee9 | 2018-12-06 18:22:28 -0800 | [diff] [blame] | 2736 | u32 mhi_reset; |
Rama Krishna Phani A | 090bbd1 | 2018-10-16 20:36:34 +0530 | [diff] [blame] | 2737 | enum mhi_dev_state state; |
| 2738 | |
| 2739 | /* Check if MHI is in syserr */ |
| 2740 | mhi_dev_mmio_masked_read(mhi, MHISTATUS, |
| 2741 | MHISTATUS_SYSERR_MASK, |
| 2742 | MHISTATUS_SYSERR_SHIFT, &syserr); |
| 2743 | |
| 2744 | mhi_log(MHI_MSG_VERBOSE, "mhi_syserr = 0x%X\n", syserr); |
| 2745 | if (syserr) { |
Siddartha Mohanadoss | e81dee9 | 2018-12-06 18:22:28 -0800 | [diff] [blame] | 2746 | /* Poll for the host to set the reset bit */ |
| 2747 | rc = mhi_dev_mmio_get_mhi_state(mhi, &state, &mhi_reset); |
| 2748 | if (rc) { |
| 2749 | pr_err("%s: get mhi state failed\n", __func__); |
| 2750 | return rc; |
| 2751 | } |
| 2752 | |
| 2753 | mhi_log(MHI_MSG_VERBOSE, "mhi_state = 0x%X, reset = %d\n", |
| 2754 | state, mhi_reset); |
| 2755 | |
Rama Krishna Phani A | 090bbd1 | 2018-10-16 20:36:34 +0530 | [diff] [blame] | 2756 | rc = mhi_dev_mmio_read(mhi, BHI_INTVEC, &bhi_intvec); |
| 2757 | if (rc) |
| 2758 | return rc; |
| 2759 | |
| 2760 | if (bhi_intvec != 0xffffffff) { |
| 2761 | /* Indicate the host that the device is ready */ |
| 2762 | rc = ep_pcie_trigger_msi(mhi->phandle, bhi_intvec); |
| 2763 | if (rc) { |
| 2764 | pr_err("%s: error sending msi\n", __func__); |
Siva Kumar Akkireddi | fb33bcb | 2019-03-01 19:42:50 +0530 | [diff] [blame] | 2765 | /* |
| 2766 | * MSIs are not enabled by host yet, set |
| 2767 | * mhistatus to syserr and exit. |
| 2768 | * Expected mhi host driver behaviour |
| 2769 | * is to check the device state and |
| 2770 | * issue a reset after it finds the device. |
| 2771 | */ |
| 2772 | goto mask_intr; |
Rama Krishna Phani A | 090bbd1 | 2018-10-16 20:36:34 +0530 | [diff] [blame] | 2773 | } |
| 2774 | } |
| 2775 | |
| 2776 | /* Poll for the host to set the reset bit */ |
| 2777 | rc = mhi_dev_mmio_get_mhi_state(mhi, &state, &mhi_reset); |
| 2778 | if (rc) { |
| 2779 | pr_err("%s: get mhi state failed\n", __func__); |
| 2780 | return rc; |
| 2781 | } |
Siddartha Mohanadoss | e81dee9 | 2018-12-06 18:22:28 -0800 | [diff] [blame] | 2782 | |
| 2783 | mhi_log(MHI_MSG_VERBOSE, "mhi_state = 0x%X, reset = %d\n", |
| 2784 | state, mhi_reset); |
| 2785 | |
| 2786 | while (mhi_reset != 0x1 && max_cnt < MHI_SUSPEND_TIMEOUT) { |
Rama Krishna Phani A | 090bbd1 | 2018-10-16 20:36:34 +0530 | [diff] [blame] | 2787 | /* Wait for Host to set the reset */ |
| 2788 | msleep(MHI_SUSPEND_MIN); |
| 2789 | rc = mhi_dev_mmio_get_mhi_state(mhi, &state, |
| 2790 | &mhi_reset); |
| 2791 | if (rc) { |
| 2792 | pr_err("%s: get mhi state failed\n", __func__); |
| 2793 | return rc; |
| 2794 | } |
| 2795 | max_cnt++; |
| 2796 | } |
| 2797 | |
| 2798 | if (!mhi_reset) { |
| 2799 | mhi_log(MHI_MSG_VERBOSE, "Host failed to set reset\n"); |
| 2800 | return -EINVAL; |
| 2801 | } |
| 2802 | } |
Siva Kumar Akkireddi | fb33bcb | 2019-03-01 19:42:50 +0530 | [diff] [blame] | 2803 | mask_intr: |
Rama Krishna Phani A | 090bbd1 | 2018-10-16 20:36:34 +0530 | [diff] [blame] | 2804 | /* |
| 2805 | * Now mask the interrupts so that the state machine moves |
| 2806 | * only after IPA is ready |
| 2807 | */ |
| 2808 | mhi_dev_mmio_mask_interrupts(mhi); |
| 2809 | return 0; |
| 2810 | } |
| 2811 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2812 | static void mhi_dev_enable(struct work_struct *work) |
| 2813 | { |
| 2814 | int rc = 0; |
| 2815 | struct ep_pcie_msi_config msi_cfg; |
| 2816 | struct mhi_dev *mhi = container_of(work, |
| 2817 | struct mhi_dev, ring_init_cb_work); |
Siddartha Mohanadoss | e81dee9 | 2018-12-06 18:22:28 -0800 | [diff] [blame] | 2818 | u32 mhi_reset; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2819 | enum mhi_dev_state state; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2820 | uint32_t max_cnt = 0, bhi_intvec = 0; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2821 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2822 | if (mhi->use_ipa) { |
| 2823 | rc = ipa_dma_init(); |
| 2824 | if (rc) { |
| 2825 | pr_err("ipa dma init failed\n"); |
| 2826 | return; |
| 2827 | } |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2828 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2829 | rc = ipa_dma_enable(); |
| 2830 | if (rc) { |
| 2831 | pr_err("ipa enable failed\n"); |
| 2832 | return; |
| 2833 | } |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2834 | } |
| 2835 | |
| 2836 | rc = mhi_dev_ring_init(mhi); |
| 2837 | if (rc) { |
| 2838 | pr_err("MHI dev ring init failed\n"); |
| 2839 | return; |
| 2840 | } |
| 2841 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2842 | rc = mhi_dev_mmio_read(mhi, BHI_INTVEC, &bhi_intvec); |
| 2843 | if (rc) |
| 2844 | return; |
| 2845 | |
| 2846 | if (bhi_intvec != 0xffffffff) { |
| 2847 | /* Indicate the host that the device is ready */ |
| 2848 | rc = ep_pcie_get_msi_config(mhi->phandle, &msi_cfg); |
| 2849 | if (!rc) { |
| 2850 | rc = ep_pcie_trigger_msi(mhi_ctx->phandle, bhi_intvec); |
| 2851 | if (rc) { |
| 2852 | pr_err("%s: error sending msi\n", __func__); |
| 2853 | return; |
| 2854 | } |
| 2855 | } else { |
| 2856 | pr_err("MHI: error geting msi configs\n"); |
| 2857 | } |
| 2858 | } |
| 2859 | |
| 2860 | rc = mhi_dev_mmio_get_mhi_state(mhi, &state, &mhi_reset); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2861 | if (rc) { |
| 2862 | pr_err("%s: get mhi state failed\n", __func__); |
| 2863 | return; |
| 2864 | } |
| 2865 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2866 | while (state != MHI_DEV_M0_STATE && max_cnt < MHI_SUSPEND_TIMEOUT) { |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2867 | /* Wait for Host to set the M0 state */ |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2868 | msleep(MHI_SUSPEND_MIN); |
| 2869 | rc = mhi_dev_mmio_get_mhi_state(mhi, &state, &mhi_reset); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2870 | if (rc) { |
| 2871 | pr_err("%s: get mhi state failed\n", __func__); |
| 2872 | return; |
| 2873 | } |
| 2874 | max_cnt++; |
| 2875 | } |
| 2876 | |
| 2877 | mhi_log(MHI_MSG_INFO, "state:%d\n", state); |
| 2878 | |
| 2879 | if (state == MHI_DEV_M0_STATE) { |
| 2880 | rc = mhi_dev_cache_host_cfg(mhi); |
| 2881 | if (rc) { |
| 2882 | pr_err("Failed to cache the host config\n"); |
| 2883 | return; |
| 2884 | } |
| 2885 | |
| 2886 | rc = mhi_dev_mmio_set_env(mhi, MHI_ENV_VALUE); |
| 2887 | if (rc) { |
| 2888 | pr_err("%s: env setting failed\n", __func__); |
| 2889 | return; |
| 2890 | } |
| 2891 | } else { |
| 2892 | pr_err("MHI device failed to enter M0\n"); |
| 2893 | return; |
| 2894 | } |
| 2895 | |
| 2896 | rc = mhi_hwc_init(mhi_ctx); |
| 2897 | if (rc) { |
| 2898 | pr_err("error during hwc_init\n"); |
| 2899 | return; |
| 2900 | } |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2901 | |
Rama Krishna Phani A | 69494ec | 2018-06-05 19:15:56 +0530 | [diff] [blame] | 2902 | if (mhi_ctx->config_iatu || mhi_ctx->mhi_int) { |
| 2903 | mhi_ctx->mhi_int_en = true; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2904 | enable_irq(mhi_ctx->mhi_irq); |
Rama Krishna Phani A | 69494ec | 2018-06-05 19:15:56 +0530 | [diff] [blame] | 2905 | } |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2906 | |
Siddartha Mohanadoss | ba314f2 | 2018-03-19 15:43:50 -0700 | [diff] [blame] | 2907 | mhi_update_state_info(MHI_DEV_UEVENT_CTRL, MHI_STATE_CONFIGURED); |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 2908 | |
| 2909 | /*Enable MHI dev network stack Interface*/ |
| 2910 | rc = mhi_dev_net_interface_init(); |
| 2911 | if (rc) |
| 2912 | pr_err("%s Failed to initialize mhi_dev_net iface\n", __func__); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 2913 | } |
| 2914 | |
| 2915 | static void mhi_ring_init_cb(void *data) |
| 2916 | { |
| 2917 | struct mhi_dev *mhi = data; |
| 2918 | |
| 2919 | if (!mhi) { |
| 2920 | pr_err("Invalid MHI ctx\n"); |
| 2921 | return; |
| 2922 | } |
| 2923 | |
| 2924 | queue_work(mhi->ring_init_wq, &mhi->ring_init_cb_work); |
| 2925 | } |
| 2926 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2927 | int mhi_register_state_cb(void (*mhi_state_cb) |
| 2928 | (struct mhi_dev_client_cb_data *cb_data), |
| 2929 | void *data, enum mhi_client_channel channel) |
| 2930 | { |
| 2931 | struct mhi_dev_ready_cb_info *cb_info = NULL; |
| 2932 | |
| 2933 | if (!mhi_ctx) { |
| 2934 | pr_err("MHI device not ready\n"); |
| 2935 | return -ENXIO; |
| 2936 | } |
| 2937 | |
Siddartha Mohanadoss | 32b0249 | 2020-03-19 22:12:00 -0700 | [diff] [blame] | 2938 | if (channel >= MHI_MAX_SOFTWARE_CHANNELS) { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2939 | pr_err("Invalid channel :%d\n", channel); |
| 2940 | return -EINVAL; |
| 2941 | } |
| 2942 | |
| 2943 | mutex_lock(&mhi_ctx->mhi_lock); |
| 2944 | cb_info = kmalloc(sizeof(struct mhi_dev_ready_cb_info), GFP_KERNEL); |
| 2945 | if (!cb_info) { |
| 2946 | mutex_unlock(&mhi_ctx->mhi_lock); |
| 2947 | return -ENOMEM; |
| 2948 | } |
| 2949 | |
| 2950 | cb_info->cb = mhi_state_cb; |
| 2951 | cb_info->cb_data.user_data = data; |
| 2952 | cb_info->cb_data.channel = channel; |
| 2953 | |
| 2954 | list_add_tail(&cb_info->list, &mhi_ctx->client_cb_list); |
| 2955 | |
| 2956 | /** |
| 2957 | * If channel is open during registration, no callback is issued. |
| 2958 | * Instead return -EEXIST to notify the client. Clients request |
| 2959 | * is added to the list to notify future state change notification. |
Siva Kumar Akkireddi | 8fd5e6c | 2018-05-21 14:53:10 +0530 | [diff] [blame] | 2960 | * Channel struct may not be allocated yet if this function is called |
| 2961 | * early during boot - add an explicit check for non-null "ch". |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2962 | */ |
Siva Kumar Akkireddi | 8fd5e6c | 2018-05-21 14:53:10 +0530 | [diff] [blame] | 2963 | if (mhi_ctx->ch && (mhi_ctx->ch[channel].state == MHI_DEV_CH_STARTED)) { |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2964 | mutex_unlock(&mhi_ctx->mhi_lock); |
| 2965 | return -EEXIST; |
| 2966 | } |
| 2967 | |
| 2968 | mutex_unlock(&mhi_ctx->mhi_lock); |
| 2969 | |
| 2970 | return 0; |
| 2971 | } |
| 2972 | EXPORT_SYMBOL(mhi_register_state_cb); |
| 2973 | |
Siddartha Mohanadoss | ba314f2 | 2018-03-19 15:43:50 -0700 | [diff] [blame] | 2974 | static void mhi_update_state_info(uint32_t uevent_idx, enum mhi_ctrl_info info) |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2975 | { |
| 2976 | struct mhi_dev_client_cb_reason reason; |
| 2977 | |
Siddartha Mohanadoss | 32b0249 | 2020-03-19 22:12:00 -0700 | [diff] [blame] | 2978 | /* Currently no clients register for HW channel notify */ |
| 2979 | if (uevent_idx >= MHI_MAX_SOFTWARE_CHANNELS) |
| 2980 | return; |
| 2981 | |
Siddartha Mohanadoss | ba314f2 | 2018-03-19 15:43:50 -0700 | [diff] [blame] | 2982 | if (uevent_idx == MHI_DEV_UEVENT_CTRL) |
| 2983 | mhi_ctx->ctrl_info = info; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2984 | |
Siddartha Mohanadoss | ba314f2 | 2018-03-19 15:43:50 -0700 | [diff] [blame] | 2985 | channel_state_info[uevent_idx].ctrl_info = info; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2986 | |
Siddartha Mohanadoss | ba314f2 | 2018-03-19 15:43:50 -0700 | [diff] [blame] | 2987 | if (uevent_idx == MHI_CLIENT_QMI_OUT || |
| 2988 | uevent_idx == MHI_CLIENT_QMI_IN) { |
| 2989 | /* For legacy reasons for QTI client */ |
| 2990 | reason.reason = MHI_DEV_CTRL_UPDATE; |
| 2991 | uci_ctrl_update(&reason); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 2992 | } |
| 2993 | |
Siddartha Mohanadoss | ba314f2 | 2018-03-19 15:43:50 -0700 | [diff] [blame] | 2994 | } |
| 2995 | |
| 2996 | int mhi_ctrl_state_info(uint32_t idx, uint32_t *info) |
| 2997 | { |
| 2998 | if (idx == MHI_DEV_UEVENT_CTRL) |
| 2999 | *info = mhi_ctx->ctrl_info; |
| 3000 | else |
Siddartha Mohanadoss | 32b0249 | 2020-03-19 22:12:00 -0700 | [diff] [blame] | 3001 | if (idx < MHI_MAX_SOFTWARE_CHANNELS) |
| 3002 | *info = channel_state_info[idx].ctrl_info; |
| 3003 | else |
| 3004 | return -EINVAL; |
Siddartha Mohanadoss | ba314f2 | 2018-03-19 15:43:50 -0700 | [diff] [blame] | 3005 | |
| 3006 | mhi_log(MHI_MSG_VERBOSE, "idx:%d, ctrl:%d", idx, *info); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3007 | |
| 3008 | return 0; |
| 3009 | } |
| 3010 | EXPORT_SYMBOL(mhi_ctrl_state_info); |
| 3011 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3012 | static int get_device_tree_data(struct platform_device *pdev) |
| 3013 | { |
| 3014 | struct mhi_dev *mhi; |
| 3015 | int rc = 0; |
| 3016 | struct resource *res_mem = NULL; |
| 3017 | |
| 3018 | mhi = devm_kzalloc(&pdev->dev, |
| 3019 | sizeof(struct mhi_dev), GFP_KERNEL); |
| 3020 | if (!mhi) |
| 3021 | return -ENOMEM; |
| 3022 | |
| 3023 | mhi->pdev = pdev; |
| 3024 | mhi->dev = &pdev->dev; |
| 3025 | res_mem = platform_get_resource_byname(pdev, |
| 3026 | IORESOURCE_MEM, "mhi_mmio_base"); |
| 3027 | if (!res_mem) { |
| 3028 | rc = -EINVAL; |
| 3029 | pr_err("Request MHI MMIO physical memory region failed\n"); |
| 3030 | return rc; |
| 3031 | } |
| 3032 | |
| 3033 | mhi->mmio_base_pa_addr = res_mem->start; |
| 3034 | mhi->mmio_base_addr = ioremap_nocache(res_mem->start, MHI_1K_SIZE); |
| 3035 | if (!mhi->mmio_base_addr) { |
| 3036 | pr_err("Failed to IO map MMIO registers.\n"); |
| 3037 | rc = -EINVAL; |
| 3038 | return rc; |
| 3039 | } |
| 3040 | |
| 3041 | res_mem = platform_get_resource_byname(pdev, |
| 3042 | IORESOURCE_MEM, "ipa_uc_mbox_crdb"); |
| 3043 | if (!res_mem) { |
| 3044 | rc = -EINVAL; |
| 3045 | pr_err("Request IPA_UC_MBOX CRDB physical region failed\n"); |
| 3046 | return rc; |
| 3047 | } |
| 3048 | |
| 3049 | mhi->ipa_uc_mbox_crdb = res_mem->start; |
| 3050 | |
| 3051 | res_mem = platform_get_resource_byname(pdev, |
| 3052 | IORESOURCE_MEM, "ipa_uc_mbox_erdb"); |
| 3053 | if (!res_mem) { |
| 3054 | rc = -EINVAL; |
| 3055 | pr_err("Request IPA_UC_MBOX ERDB physical region failed\n"); |
| 3056 | return rc; |
| 3057 | } |
| 3058 | |
| 3059 | mhi->ipa_uc_mbox_erdb = res_mem->start; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3060 | mhi_ctx = mhi; |
| 3061 | |
| 3062 | rc = of_property_read_u32((&pdev->dev)->of_node, |
| 3063 | "qcom,mhi-ifc-id", |
| 3064 | &mhi_ctx->ifc_id); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3065 | if (rc) { |
| 3066 | pr_err("qcom,mhi-ifc-id does not exist.\n"); |
| 3067 | return rc; |
| 3068 | } |
| 3069 | |
| 3070 | rc = of_property_read_u32((&pdev->dev)->of_node, |
| 3071 | "qcom,mhi-ep-msi", |
| 3072 | &mhi_ctx->mhi_ep_msi_num); |
| 3073 | if (rc) { |
| 3074 | pr_err("qcom,mhi-ep-msi does not exist.\n"); |
| 3075 | return rc; |
| 3076 | } |
| 3077 | |
| 3078 | rc = of_property_read_u32((&pdev->dev)->of_node, |
| 3079 | "qcom,mhi-version", |
| 3080 | &mhi_ctx->mhi_version); |
| 3081 | if (rc) { |
| 3082 | pr_err("qcom,mhi-version does not exist.\n"); |
| 3083 | return rc; |
| 3084 | } |
| 3085 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3086 | mhi_ctx->use_ipa = of_property_read_bool((&pdev->dev)->of_node, |
| 3087 | "qcom,use-ipa-software-channel"); |
| 3088 | |
| 3089 | mhi_ctx->config_iatu = of_property_read_bool((&pdev->dev)->of_node, |
| 3090 | "qcom,mhi-config-iatu"); |
| 3091 | |
| 3092 | if (mhi_ctx->config_iatu) { |
| 3093 | rc = of_property_read_u32((&pdev->dev)->of_node, |
| 3094 | "qcom,mhi-local-pa-base", |
| 3095 | &mhi_ctx->device_local_pa_base); |
| 3096 | if (rc) { |
| 3097 | pr_err("qcom,mhi-local-pa-base does not exist\n"); |
| 3098 | return rc; |
| 3099 | } |
| 3100 | } |
| 3101 | |
| 3102 | mhi_ctx->mhi_int = of_property_read_bool((&pdev->dev)->of_node, |
| 3103 | "qcom,mhi-interrupt"); |
| 3104 | |
| 3105 | if (mhi->config_iatu || mhi_ctx->mhi_int) { |
| 3106 | mhi->mhi_irq = platform_get_irq_byname(pdev, "mhi-device-inta"); |
| 3107 | if (mhi->mhi_irq < 0) { |
| 3108 | pr_err("Invalid MHI device interrupt\n"); |
| 3109 | rc = mhi->mhi_irq; |
| 3110 | return rc; |
| 3111 | } |
| 3112 | } |
| 3113 | |
| 3114 | device_init_wakeup(mhi->dev, true); |
| 3115 | /* MHI device will be woken up from PCIe event */ |
| 3116 | device_set_wakeup_capable(mhi->dev, false); |
| 3117 | /* Hold a wakelock until completion of M0 */ |
| 3118 | pm_stay_awake(mhi->dev); |
| 3119 | atomic_set(&mhi->mhi_dev_wake, 1); |
| 3120 | |
| 3121 | mhi_log(MHI_MSG_VERBOSE, "acquiring wakelock\n"); |
| 3122 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3123 | return 0; |
| 3124 | } |
| 3125 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3126 | static int mhi_deinit(struct mhi_dev *mhi) |
| 3127 | { |
| 3128 | int rc = 0, i = 0, ring_id = 0; |
| 3129 | struct mhi_dev_ring *ring; |
| 3130 | struct platform_device *pdev = mhi->pdev; |
| 3131 | |
| 3132 | ring_id = mhi->cfg.channels + mhi->cfg.event_rings + 1; |
| 3133 | |
| 3134 | for (i = 0; i < ring_id; i++) { |
| 3135 | ring = &mhi->ring[i]; |
| 3136 | if (ring->state == RING_STATE_UINT) |
| 3137 | continue; |
| 3138 | |
| 3139 | dma_free_coherent(mhi->dev, ring->ring_size * |
| 3140 | sizeof(union mhi_dev_ring_element_type), |
| 3141 | ring->ring_cache, |
| 3142 | ring->ring_cache_dma_handle); |
| 3143 | } |
| 3144 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3145 | devm_kfree(&pdev->dev, mhi->mmio_backup); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3146 | devm_kfree(&pdev->dev, mhi->ring); |
| 3147 | |
| 3148 | mhi_dev_sm_exit(mhi); |
| 3149 | |
| 3150 | mhi->mmio_initialized = false; |
| 3151 | |
| 3152 | return rc; |
| 3153 | } |
| 3154 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3155 | static int mhi_init(struct mhi_dev *mhi) |
| 3156 | { |
| 3157 | int rc = 0, i = 0; |
| 3158 | struct platform_device *pdev = mhi->pdev; |
| 3159 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3160 | rc = mhi_dev_mmio_init(mhi); |
| 3161 | if (rc) { |
| 3162 | pr_err("Failed to update the MMIO init\n"); |
| 3163 | return rc; |
| 3164 | } |
| 3165 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3166 | mhi->ring = devm_kzalloc(&pdev->dev, |
| 3167 | (sizeof(struct mhi_dev_ring) * |
| 3168 | (mhi->cfg.channels + mhi->cfg.event_rings + 1)), |
| 3169 | GFP_KERNEL); |
| 3170 | if (!mhi->ring) |
| 3171 | return -ENOMEM; |
| 3172 | |
Siva Kumar Akkireddi | ad59887 | 2018-12-03 19:17:54 +0530 | [diff] [blame] | 3173 | /* |
| 3174 | * mhi_init is also called during device reset, in |
| 3175 | * which case channel mem will already be allocated. |
| 3176 | */ |
| 3177 | if (!mhi->ch) { |
| 3178 | mhi->ch = devm_kzalloc(&pdev->dev, |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3179 | (sizeof(struct mhi_dev_channel) * |
| 3180 | (mhi->cfg.channels)), GFP_KERNEL); |
Siva Kumar Akkireddi | ad59887 | 2018-12-03 19:17:54 +0530 | [diff] [blame] | 3181 | if (!mhi->ch) |
| 3182 | return -ENOMEM; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3183 | |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 3184 | for (i = 0; i < mhi->cfg.channels; i++) { |
| 3185 | mhi->ch[i].ch_id = i; |
Siva Kumar Akkireddi | ad59887 | 2018-12-03 19:17:54 +0530 | [diff] [blame] | 3186 | mutex_init(&mhi->ch[i].ch_lock); |
Siva Kumar Akkireddi | e7d055b | 2018-10-11 22:27:55 +0530 | [diff] [blame] | 3187 | } |
Siva Kumar Akkireddi | ad59887 | 2018-12-03 19:17:54 +0530 | [diff] [blame] | 3188 | } |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3189 | |
| 3190 | spin_lock_init(&mhi->lock); |
| 3191 | mhi->mmio_backup = devm_kzalloc(&pdev->dev, |
| 3192 | MHI_DEV_MMIO_RANGE, GFP_KERNEL); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3193 | if (!mhi->mmio_backup) |
| 3194 | return -ENOMEM; |
| 3195 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3196 | return 0; |
| 3197 | } |
| 3198 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3199 | static int mhi_dev_resume_mmio_mhi_reinit(struct mhi_dev *mhi_ctx) |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3200 | { |
| 3201 | int rc = 0; |
| 3202 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3203 | mutex_lock(&mhi_ctx->mhi_lock); |
| 3204 | if (atomic_read(&mhi_ctx->re_init_done)) { |
| 3205 | mhi_log(MHI_MSG_INFO, "Re_init done, return\n"); |
| 3206 | mutex_unlock(&mhi_ctx->mhi_lock); |
| 3207 | return 0; |
| 3208 | } |
| 3209 | |
| 3210 | rc = mhi_init(mhi_ctx); |
| 3211 | if (rc) { |
| 3212 | pr_err("Error initializing MHI MMIO with %d\n", rc); |
| 3213 | goto fail; |
| 3214 | } |
| 3215 | |
| 3216 | mhi_ctx->event_reg.events = EP_PCIE_EVENT_PM_D3_HOT | |
| 3217 | EP_PCIE_EVENT_PM_D3_COLD | |
| 3218 | EP_PCIE_EVENT_PM_D0 | |
| 3219 | EP_PCIE_EVENT_PM_RST_DEAST | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3220 | EP_PCIE_EVENT_LINKDOWN; |
Siva Kumar Akkireddi | dd7c6ed | 2018-09-07 15:04:17 +0530 | [diff] [blame] | 3221 | if (!mhi_ctx->mhi_int) |
| 3222 | mhi_ctx->event_reg.events |= EP_PCIE_EVENT_MHI_A7; |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3223 | mhi_ctx->event_reg.user = mhi_ctx; |
| 3224 | mhi_ctx->event_reg.mode = EP_PCIE_TRIGGER_CALLBACK; |
| 3225 | mhi_ctx->event_reg.callback = mhi_dev_sm_pcie_handler; |
| 3226 | |
| 3227 | rc = ep_pcie_register_event(mhi_ctx->phandle, &mhi_ctx->event_reg); |
| 3228 | if (rc) { |
| 3229 | pr_err("Failed to register for events from PCIe\n"); |
| 3230 | goto fail; |
| 3231 | } |
| 3232 | |
| 3233 | rc = ipa_register_ipa_ready_cb(mhi_ring_init_cb, mhi_ctx); |
| 3234 | if (rc < 0) { |
| 3235 | if (rc == -EEXIST) { |
| 3236 | mhi_ring_init_cb(mhi_ctx); |
| 3237 | } else { |
| 3238 | pr_err("Error calling IPA cb with %d\n", rc); |
| 3239 | goto fail; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3240 | } |
| 3241 | } |
| 3242 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3243 | /* Invoke MHI SM when device is in RESET state */ |
| 3244 | rc = mhi_dev_sm_init(mhi_ctx); |
| 3245 | if (rc) { |
| 3246 | pr_err("%s: Error during SM init\n", __func__); |
| 3247 | goto fail; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3248 | } |
| 3249 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3250 | /* set the env before setting the ready bit */ |
| 3251 | rc = mhi_dev_mmio_set_env(mhi_ctx, MHI_ENV_VALUE); |
| 3252 | if (rc) { |
| 3253 | pr_err("%s: env setting failed\n", __func__); |
| 3254 | goto fail; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3255 | } |
| 3256 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3257 | /* All set, notify the host */ |
| 3258 | rc = mhi_dev_sm_set_ready(); |
| 3259 | if (rc) { |
| 3260 | pr_err("%s: unable to set ready bit\n", __func__); |
| 3261 | goto fail; |
| 3262 | } |
| 3263 | |
| 3264 | atomic_set(&mhi_ctx->is_suspended, 0); |
| 3265 | fail: |
| 3266 | atomic_set(&mhi_ctx->re_init_done, 1); |
| 3267 | mutex_unlock(&mhi_ctx->mhi_lock); |
| 3268 | return rc; |
| 3269 | } |
| 3270 | |
| 3271 | static void mhi_dev_reinit(struct work_struct *work) |
| 3272 | { |
| 3273 | struct mhi_dev *mhi_ctx = container_of(work, |
| 3274 | struct mhi_dev, re_init); |
| 3275 | enum ep_pcie_link_status link_state; |
| 3276 | int rc = 0; |
| 3277 | |
| 3278 | link_state = ep_pcie_get_linkstatus(mhi_ctx->phandle); |
| 3279 | if (link_state == EP_PCIE_LINK_ENABLED) { |
| 3280 | /* PCIe link is up with BME set */ |
| 3281 | rc = mhi_dev_resume_mmio_mhi_reinit(mhi_ctx); |
| 3282 | if (rc) { |
| 3283 | pr_err("Failed to register for events from PCIe\n"); |
| 3284 | return; |
| 3285 | } |
| 3286 | } |
| 3287 | |
| 3288 | mhi_log(MHI_MSG_VERBOSE, "Wait for PCIe linkup\n"); |
| 3289 | } |
| 3290 | |
| 3291 | static int mhi_dev_resume_mmio_mhi_init(struct mhi_dev *mhi_ctx) |
| 3292 | { |
| 3293 | struct platform_device *pdev; |
| 3294 | int rc = 0; |
| 3295 | |
Siva Kumar Akkireddi | daedab7 | 2018-12-29 21:17:01 +0530 | [diff] [blame] | 3296 | /* |
| 3297 | * There could be multiple calls to this function if device gets |
| 3298 | * multiple link-up events (bme irqs). |
| 3299 | */ |
| 3300 | if (mhi_ctx->init_done) { |
| 3301 | mhi_log(MHI_MSG_INFO, "mhi init already done, returning\n"); |
| 3302 | return 0; |
| 3303 | } |
| 3304 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3305 | pdev = mhi_ctx->pdev; |
| 3306 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3307 | INIT_WORK(&mhi_ctx->chdb_ctrl_work, mhi_dev_scheduler); |
| 3308 | |
| 3309 | mhi_ctx->pending_ring_wq = alloc_workqueue("mhi_pending_wq", |
| 3310 | WQ_HIGHPRI, 0); |
| 3311 | if (!mhi_ctx->pending_ring_wq) { |
| 3312 | rc = -ENOMEM; |
| 3313 | return rc; |
| 3314 | } |
| 3315 | |
| 3316 | INIT_WORK(&mhi_ctx->pending_work, mhi_dev_process_ring_pending); |
| 3317 | |
| 3318 | INIT_WORK(&mhi_ctx->ring_init_cb_work, mhi_dev_enable); |
| 3319 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3320 | INIT_WORK(&mhi_ctx->re_init, mhi_dev_reinit); |
| 3321 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3322 | mhi_ctx->ring_init_wq = alloc_workqueue("mhi_ring_init_cb_wq", |
| 3323 | WQ_HIGHPRI, 0); |
| 3324 | if (!mhi_ctx->ring_init_wq) { |
| 3325 | rc = -ENOMEM; |
| 3326 | return rc; |
| 3327 | } |
| 3328 | |
| 3329 | INIT_LIST_HEAD(&mhi_ctx->event_ring_list); |
| 3330 | INIT_LIST_HEAD(&mhi_ctx->process_ring_list); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3331 | mutex_init(&mhi_ctx->mhi_event_lock); |
| 3332 | mutex_init(&mhi_ctx->mhi_write_test); |
| 3333 | |
Rama Krishna Phani A | 090bbd1 | 2018-10-16 20:36:34 +0530 | [diff] [blame] | 3334 | mhi_ctx->phandle = ep_pcie_get_phandle(mhi_ctx->ifc_id); |
| 3335 | if (!mhi_ctx->phandle) { |
| 3336 | pr_err("PCIe driver get handle failed.\n"); |
| 3337 | return -EINVAL; |
| 3338 | } |
| 3339 | |
| 3340 | rc = mhi_dev_recover(mhi_ctx); |
| 3341 | if (rc) { |
| 3342 | pr_err("%s: get mhi state failed\n", __func__); |
| 3343 | return rc; |
| 3344 | } |
| 3345 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3346 | rc = mhi_init(mhi_ctx); |
| 3347 | if (rc) |
| 3348 | return rc; |
| 3349 | |
| 3350 | mhi_ctx->dma_cache = dma_alloc_coherent(&pdev->dev, |
| 3351 | (TRB_MAX_DATA_SIZE * 4), |
| 3352 | &mhi_ctx->cache_dma_handle, GFP_KERNEL); |
| 3353 | if (!mhi_ctx->dma_cache) |
| 3354 | return -ENOMEM; |
| 3355 | |
| 3356 | mhi_ctx->read_handle = dma_alloc_coherent(&pdev->dev, |
| 3357 | (TRB_MAX_DATA_SIZE * 4), |
| 3358 | &mhi_ctx->read_dma_handle, |
| 3359 | GFP_KERNEL); |
| 3360 | if (!mhi_ctx->read_handle) |
| 3361 | return -ENOMEM; |
| 3362 | |
| 3363 | mhi_ctx->write_handle = dma_alloc_coherent(&pdev->dev, |
| 3364 | (TRB_MAX_DATA_SIZE * 24), |
| 3365 | &mhi_ctx->write_dma_handle, |
| 3366 | GFP_KERNEL); |
| 3367 | if (!mhi_ctx->write_handle) |
| 3368 | return -ENOMEM; |
| 3369 | |
| 3370 | rc = mhi_dev_mmio_write(mhi_ctx, MHIVER, mhi_ctx->mhi_version); |
| 3371 | if (rc) { |
| 3372 | pr_err("Failed to update the MHI version\n"); |
| 3373 | return rc; |
| 3374 | } |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3375 | mhi_ctx->event_reg.events = EP_PCIE_EVENT_PM_D3_HOT | |
| 3376 | EP_PCIE_EVENT_PM_D3_COLD | |
| 3377 | EP_PCIE_EVENT_PM_D0 | |
| 3378 | EP_PCIE_EVENT_PM_RST_DEAST | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3379 | EP_PCIE_EVENT_LINKDOWN; |
Siva Kumar Akkireddi | dd7c6ed | 2018-09-07 15:04:17 +0530 | [diff] [blame] | 3380 | if (!mhi_ctx->mhi_int) |
| 3381 | mhi_ctx->event_reg.events |= EP_PCIE_EVENT_MHI_A7; |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3382 | mhi_ctx->event_reg.user = mhi_ctx; |
| 3383 | mhi_ctx->event_reg.mode = EP_PCIE_TRIGGER_CALLBACK; |
| 3384 | mhi_ctx->event_reg.callback = mhi_dev_sm_pcie_handler; |
| 3385 | |
| 3386 | rc = ep_pcie_register_event(mhi_ctx->phandle, &mhi_ctx->event_reg); |
| 3387 | if (rc) { |
| 3388 | pr_err("Failed to register for events from PCIe\n"); |
| 3389 | return rc; |
| 3390 | } |
| 3391 | |
| 3392 | pr_err("Registering with IPA\n"); |
| 3393 | |
| 3394 | rc = ipa_register_ipa_ready_cb(mhi_ring_init_cb, mhi_ctx); |
| 3395 | if (rc < 0) { |
| 3396 | if (rc == -EEXIST) { |
| 3397 | mhi_ring_init_cb(mhi_ctx); |
| 3398 | } else { |
| 3399 | pr_err("Error calling IPA cb with %d\n", rc); |
| 3400 | return rc; |
| 3401 | } |
| 3402 | } |
| 3403 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3404 | /* Invoke MHI SM when device is in RESET state */ |
| 3405 | rc = mhi_dev_sm_init(mhi_ctx); |
| 3406 | if (rc) { |
| 3407 | pr_err("%s: Error during SM init\n", __func__); |
| 3408 | return rc; |
| 3409 | } |
| 3410 | |
| 3411 | /* set the env before setting the ready bit */ |
| 3412 | rc = mhi_dev_mmio_set_env(mhi_ctx, MHI_ENV_VALUE); |
| 3413 | if (rc) { |
| 3414 | pr_err("%s: env setting failed\n", __func__); |
| 3415 | return rc; |
| 3416 | } |
| 3417 | |
| 3418 | /* All set, notify the host */ |
| 3419 | mhi_dev_sm_set_ready(); |
| 3420 | |
| 3421 | if (mhi_ctx->config_iatu || mhi_ctx->mhi_int) { |
| 3422 | rc = devm_request_irq(&pdev->dev, mhi_ctx->mhi_irq, mhi_dev_isr, |
| 3423 | IRQF_TRIGGER_HIGH, "mhi_isr", mhi_ctx); |
| 3424 | if (rc) { |
| 3425 | dev_err(&pdev->dev, "request mhi irq failed %d\n", rc); |
| 3426 | return -EINVAL; |
| 3427 | } |
| 3428 | |
| 3429 | disable_irq(mhi_ctx->mhi_irq); |
| 3430 | } |
| 3431 | |
Siva Kumar Akkireddi | daedab7 | 2018-12-29 21:17:01 +0530 | [diff] [blame] | 3432 | mhi_ctx->init_done = true; |
| 3433 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3434 | return 0; |
| 3435 | } |
| 3436 | |
| 3437 | static void mhi_dev_resume_init_with_link_up(struct ep_pcie_notify *notify) |
| 3438 | { |
| 3439 | if (!notify || !notify->user) { |
| 3440 | pr_err("Null argument for notify\n"); |
| 3441 | return; |
| 3442 | } |
| 3443 | |
| 3444 | mhi_ctx = notify->user; |
| 3445 | mhi_dev_pcie_notify_event = notify->options; |
| 3446 | mhi_log(MHI_MSG_INFO, |
| 3447 | "PCIe event=0x%x\n", notify->options); |
| 3448 | queue_work(mhi_ctx->pcie_event_wq, &mhi_ctx->pcie_event); |
| 3449 | } |
| 3450 | |
| 3451 | static void mhi_dev_pcie_handle_event(struct work_struct *work) |
| 3452 | { |
| 3453 | struct mhi_dev *mhi_ctx = container_of(work, struct mhi_dev, |
| 3454 | pcie_event); |
| 3455 | int rc = 0; |
| 3456 | |
| 3457 | if (mhi_dev_pcie_notify_event == MHI_INIT) { |
| 3458 | rc = mhi_dev_resume_mmio_mhi_init(mhi_ctx); |
| 3459 | if (rc) { |
| 3460 | pr_err("Error during MHI device initialization\n"); |
| 3461 | return; |
| 3462 | } |
| 3463 | } else if (mhi_dev_pcie_notify_event == MHI_REINIT) { |
| 3464 | rc = mhi_dev_resume_mmio_mhi_reinit(mhi_ctx); |
| 3465 | if (rc) { |
| 3466 | pr_err("Error during MHI device re-initialization\n"); |
| 3467 | return; |
| 3468 | } |
| 3469 | } |
| 3470 | } |
| 3471 | |
| 3472 | static int mhi_dev_probe(struct platform_device *pdev) |
| 3473 | { |
| 3474 | int rc = 0; |
| 3475 | |
| 3476 | if (pdev->dev.of_node) { |
| 3477 | rc = get_device_tree_data(pdev); |
| 3478 | if (rc) { |
| 3479 | pr_err("Error reading MHI Dev DT\n"); |
| 3480 | return rc; |
| 3481 | } |
| 3482 | mhi_ipc_log = ipc_log_context_create(MHI_IPC_LOG_PAGES, |
| 3483 | "mhi", 0); |
| 3484 | if (mhi_ipc_log == NULL) { |
| 3485 | dev_err(&pdev->dev, |
| 3486 | "Failed to create IPC logging context\n"); |
| 3487 | } |
Siva Kumar Akkireddi | 8fd5e6c | 2018-05-21 14:53:10 +0530 | [diff] [blame] | 3488 | /* |
| 3489 | * The below list and mutex should be initialized |
| 3490 | * before calling mhi_uci_init to avoid crash in |
| 3491 | * mhi_register_state_cb when accessing these. |
| 3492 | */ |
| 3493 | INIT_LIST_HEAD(&mhi_ctx->client_cb_list); |
| 3494 | mutex_init(&mhi_ctx->mhi_lock); |
| 3495 | |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3496 | mhi_uci_init(); |
Siddartha Mohanadoss | ba314f2 | 2018-03-19 15:43:50 -0700 | [diff] [blame] | 3497 | mhi_update_state_info(MHI_DEV_UEVENT_CTRL, |
| 3498 | MHI_STATE_CONFIGURED); |
Siddartha Mohanadoss | e095433 | 2018-01-15 14:03:03 -0800 | [diff] [blame] | 3499 | } |
| 3500 | |
| 3501 | INIT_WORK(&mhi_ctx->pcie_event, mhi_dev_pcie_handle_event); |
| 3502 | mhi_ctx->pcie_event_wq = alloc_workqueue("mhi_dev_pcie_event_wq", |
| 3503 | WQ_HIGHPRI, 0); |
| 3504 | if (!mhi_ctx->pcie_event_wq) { |
| 3505 | pr_err("no memory\n"); |
| 3506 | rc = -ENOMEM; |
| 3507 | return rc; |
| 3508 | } |
| 3509 | |
| 3510 | mhi_ctx->phandle = ep_pcie_get_phandle(mhi_ctx->ifc_id); |
| 3511 | if (mhi_ctx->phandle) { |
| 3512 | /* PCIe link is already up */ |
| 3513 | rc = mhi_dev_resume_mmio_mhi_init(mhi_ctx); |
| 3514 | if (rc) { |
| 3515 | pr_err("Error during MHI device initialization\n"); |
| 3516 | return rc; |
| 3517 | } |
| 3518 | } else { |
| 3519 | pr_debug("Register a PCIe callback\n"); |
| 3520 | mhi_ctx->event_reg.events = EP_PCIE_EVENT_LINKUP; |
| 3521 | mhi_ctx->event_reg.user = mhi_ctx; |
| 3522 | mhi_ctx->event_reg.mode = EP_PCIE_TRIGGER_CALLBACK; |
| 3523 | mhi_ctx->event_reg.callback = mhi_dev_resume_init_with_link_up; |
| 3524 | mhi_ctx->event_reg.options = MHI_INIT; |
| 3525 | |
| 3526 | rc = ep_pcie_register_event(mhi_ctx->phandle, |
| 3527 | &mhi_ctx->event_reg); |
| 3528 | if (rc) { |
| 3529 | pr_err("Failed to register for events from PCIe\n"); |
| 3530 | return rc; |
| 3531 | } |
| 3532 | } |
| 3533 | |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3534 | return 0; |
| 3535 | } |
| 3536 | |
| 3537 | static int mhi_dev_remove(struct platform_device *pdev) |
| 3538 | { |
| 3539 | platform_set_drvdata(pdev, NULL); |
| 3540 | |
| 3541 | return 0; |
| 3542 | } |
| 3543 | |
| 3544 | static const struct of_device_id mhi_dev_match_table[] = { |
| 3545 | { .compatible = "qcom,msm-mhi-dev" }, |
| 3546 | {} |
| 3547 | }; |
| 3548 | |
| 3549 | static struct platform_driver mhi_dev_driver = { |
| 3550 | .driver = { |
| 3551 | .name = "qcom,msm-mhi-dev", |
| 3552 | .of_match_table = mhi_dev_match_table, |
| 3553 | }, |
| 3554 | .probe = mhi_dev_probe, |
| 3555 | .remove = mhi_dev_remove, |
| 3556 | }; |
| 3557 | |
| 3558 | module_param(mhi_msg_lvl, uint, 0644); |
| 3559 | module_param(mhi_ipc_msg_lvl, uint, 0644); |
| 3560 | |
| 3561 | MODULE_PARM_DESC(mhi_msg_lvl, "mhi msg lvl"); |
| 3562 | MODULE_PARM_DESC(mhi_ipc_msg_lvl, "mhi ipc msg lvl"); |
| 3563 | |
| 3564 | static int __init mhi_dev_init(void) |
| 3565 | { |
| 3566 | return platform_driver_register(&mhi_dev_driver); |
| 3567 | } |
Siva Kumar Akkireddi | 016b09f | 2018-10-25 21:30:37 +0530 | [diff] [blame] | 3568 | subsys_initcall(mhi_dev_init); |
Siddartha Mohanadoss | 603f765 | 2017-01-26 15:59:41 -0800 | [diff] [blame] | 3569 | |
| 3570 | static void __exit mhi_dev_exit(void) |
| 3571 | { |
| 3572 | platform_driver_unregister(&mhi_dev_driver); |
| 3573 | } |
| 3574 | module_exit(mhi_dev_exit); |
| 3575 | |
| 3576 | MODULE_DESCRIPTION("MHI device driver"); |
| 3577 | MODULE_LICENSE("GPL v2"); |