Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 1 | /* |
Jeff Johnson | 6875531 | 2017-02-10 11:46:55 -0800 | [diff] [blame] | 2 | * Copyright (c) 2016-2017 The Linux Foundation. All rights reserved. |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 3 | * |
| 4 | * Previously licensed under the ISC license by Qualcomm Atheros, Inc. |
| 5 | * |
| 6 | * |
| 7 | * Permission to use, copy, modify, and/or distribute this software for |
| 8 | * any purpose with or without fee is hereby granted, provided that the |
| 9 | * above copyright notice and this permission notice appear in all |
| 10 | * copies. |
| 11 | * |
| 12 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
| 13 | * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
| 14 | * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
| 15 | * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| 16 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| 17 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 18 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 19 | * PERFORMANCE OF THIS SOFTWARE. |
| 20 | */ |
| 21 | |
| 22 | /* |
| 23 | * This file was originally distributed by Qualcomm Atheros, Inc. |
| 24 | * under proprietary terms before Copyright ownership was assigned |
| 25 | * to the Linux Foundation. |
| 26 | */ |
| 27 | |
| 28 | /** |
| 29 | * DOC : wlan_hdd_memdump.c |
| 30 | * |
| 31 | * WLAN Host Device Driver file for dumping firmware memory |
| 32 | * |
| 33 | */ |
| 34 | |
| 35 | #include <sme_api.h> |
| 36 | #include <wlan_hdd_includes.h> |
| 37 | #include "wlan_hdd_memdump.h" |
| 38 | #include <linux/module.h> |
| 39 | #include <linux/kernel.h> |
| 40 | #include <linux/version.h> |
| 41 | #include <linux/proc_fs.h> /* Necessary because we use the proc fs */ |
| 42 | #include <linux/uaccess.h> /* for copy_to_user */ |
| 43 | |
| 44 | /** |
| 45 | * hdd_fw_dump_context - hdd firmware memory dump context |
| 46 | * |
| 47 | * @request_id: userspace assigned firmware memory dump request ID |
| 48 | * @response_event: firmware memory dump request wait event |
| 49 | */ |
| 50 | struct hdd_fw_dump_context { |
| 51 | uint32_t request_id; |
| 52 | struct completion response_event; |
| 53 | }; |
| 54 | static struct hdd_fw_dump_context fw_dump_context; |
| 55 | |
| 56 | /** |
| 57 | * memdump_cleanup_timer_cb() - Timer callback function for memory dump cleanup. |
| 58 | * |
| 59 | * @data: Callback data (used to stored HDD context) |
| 60 | * |
| 61 | * Callback function registered for memory dump cleanup VOS timer. |
| 62 | * |
| 63 | * Return: none |
| 64 | */ |
| 65 | |
| 66 | static void memdump_cleanup_timer_cb(void *data) |
| 67 | { |
| 68 | int status; |
| 69 | hdd_context_t *hdd_ctx = data; |
Anurag Chouhan | 6d76066 | 2016-02-20 16:05:43 +0530 | [diff] [blame] | 70 | qdf_dma_addr_t paddr; |
| 71 | qdf_dma_addr_t dma_ctx = 0; |
Anurag Chouhan | df2b268 | 2016-02-29 14:15:27 +0530 | [diff] [blame] | 72 | qdf_device_t qdf_ctx; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 73 | |
| 74 | status = wlan_hdd_validate_context(hdd_ctx); |
Abhishek Singh | 23edd1c | 2016-05-05 11:56:06 +0530 | [diff] [blame] | 75 | if (status) |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 76 | return; |
Abhishek Singh | 23edd1c | 2016-05-05 11:56:06 +0530 | [diff] [blame] | 77 | |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 78 | |
| 79 | if (!hdd_ctx->fw_dump_loc) { |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame^] | 80 | hdd_debug("Memory dump already freed"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 81 | return; |
| 82 | } |
| 83 | |
Anurag Chouhan | df2b268 | 2016-02-29 14:15:27 +0530 | [diff] [blame] | 84 | qdf_ctx = cds_get_context(QDF_MODULE_ID_QDF_DEVICE); |
| 85 | if (!qdf_ctx) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 86 | hdd_err("QDF context is NULL"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 87 | return; |
| 88 | } |
| 89 | |
| 90 | paddr = hdd_ctx->dump_loc_paddr; |
| 91 | mutex_lock(&hdd_ctx->memdump_lock); |
Anurag Chouhan | f04e84f | 2016-03-03 10:12:12 +0530 | [diff] [blame] | 92 | qdf_mem_free_consistent(qdf_ctx, qdf_ctx->dev, |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 93 | FW_MEM_DUMP_SIZE, hdd_ctx->fw_dump_loc, paddr, dma_ctx); |
| 94 | hdd_ctx->fw_dump_loc = NULL; |
| 95 | hdd_ctx->memdump_in_progress = false; |
| 96 | mutex_unlock(&hdd_ctx->memdump_lock); |
| 97 | |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * wlan_hdd_cfg80211_fw_mem_dump_cb() - Callback to receive FW memory dump |
| 102 | * @ctx: pointer to HDD context. |
Arun Khandavalli | 4b55da7 | 2016-07-19 19:55:01 +0530 | [diff] [blame] | 103 | * @dump_rsp: pointer to fw dump copy complete response |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 104 | * |
| 105 | * This is a callback function used to indicate user space about the |
| 106 | * availability for firmware memory dump via vendor event. |
| 107 | * |
| 108 | * Return: None |
| 109 | */ |
Arun Khandavalli | 4b55da7 | 2016-07-19 19:55:01 +0530 | [diff] [blame] | 110 | void wlan_hdd_cfg80211_fw_mem_dump_cb(void *ctx, |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 111 | struct fw_dump_rsp *dump_rsp) |
| 112 | { |
| 113 | hdd_context_t *hdd_ctx = ctx; |
| 114 | struct hdd_fw_dump_context *context; |
| 115 | int status; |
| 116 | |
| 117 | status = wlan_hdd_validate_context(hdd_ctx); |
Abhishek Singh | 23edd1c | 2016-05-05 11:56:06 +0530 | [diff] [blame] | 118 | if (status) |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 119 | return; |
Abhishek Singh | 23edd1c | 2016-05-05 11:56:06 +0530 | [diff] [blame] | 120 | |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 121 | |
| 122 | spin_lock(&hdd_context_lock); |
| 123 | context = &fw_dump_context; |
| 124 | /* validate the response received */ |
| 125 | if (!dump_rsp->dump_complete || |
| 126 | context->request_id != dump_rsp->request_id) { |
| 127 | spin_unlock(&hdd_context_lock); |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame^] | 128 | hdd_err("request_id: %d response_id: %d status: %d", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 129 | context->request_id, dump_rsp->request_id, |
| 130 | dump_rsp->dump_complete); |
| 131 | return; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 132 | } |
Jeff Johnson | 6875531 | 2017-02-10 11:46:55 -0800 | [diff] [blame] | 133 | complete(&context->response_event); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 134 | spin_unlock(&hdd_context_lock); |
| 135 | |
| 136 | return; |
| 137 | } |
| 138 | |
| 139 | /** |
| 140 | * wlan_hdd_send_memdump_rsp - send memory dump response to user space |
| 141 | * @hdd_ctx: Pointer to hdd context |
| 142 | * |
| 143 | * Return: 0 for success; non-zero for failure |
| 144 | */ |
| 145 | static int wlan_hdd_send_memdump_rsp(hdd_context_t *hdd_ctx) |
| 146 | { |
| 147 | struct sk_buff *skb; |
| 148 | int status; |
| 149 | |
| 150 | status = wlan_hdd_validate_context(hdd_ctx); |
Abhishek Singh | 23edd1c | 2016-05-05 11:56:06 +0530 | [diff] [blame] | 151 | if (status) |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 152 | return status; |
Abhishek Singh | 23edd1c | 2016-05-05 11:56:06 +0530 | [diff] [blame] | 153 | |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 154 | |
| 155 | skb = cfg80211_vendor_cmd_alloc_reply_skb(hdd_ctx->wiphy, |
| 156 | NLMSG_HDRLEN + NLA_HDRLEN + sizeof(uint32_t)); |
| 157 | |
| 158 | if (!skb) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 159 | hdd_err("cfg80211_vendor_cmd_alloc_reply_skb failed"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 160 | return -ENOMEM; |
| 161 | } |
| 162 | |
| 163 | if (nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_MEMDUMP_SIZE, |
| 164 | FW_MEM_DUMP_SIZE)) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 165 | hdd_err("nla put fail"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 166 | goto nla_put_failure; |
| 167 | } |
| 168 | |
| 169 | cfg80211_vendor_cmd_reply(skb); |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame^] | 170 | hdd_debug("Memdump event sent successfully to user space"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 171 | return 0; |
| 172 | |
| 173 | nla_put_failure: |
| 174 | kfree_skb(skb); |
| 175 | return -EINVAL; |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * __wlan_hdd_cfg80211_get_fw_mem_dump() - Get FW memory dump |
| 180 | * @wiphy: pointer to wireless wiphy structure. |
| 181 | * @wdev: pointer to wireless_dev structure. |
| 182 | * @data: Pointer to the NL data. |
| 183 | * @data_len:Length of @data |
| 184 | * |
| 185 | * This is called when wlan driver needs to get the firmware memory dump |
| 186 | * via vendor specific command. |
| 187 | * |
| 188 | * Return: 0 on success, error number otherwise. |
| 189 | */ |
| 190 | static int __wlan_hdd_cfg80211_get_fw_mem_dump(struct wiphy *wiphy, |
| 191 | struct wireless_dev *wdev, |
| 192 | const void *data, int data_len) |
| 193 | { |
| 194 | int status; |
Anurag Chouhan | fb54ab0 | 2016-02-18 18:00:46 +0530 | [diff] [blame] | 195 | QDF_STATUS sme_status; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 196 | hdd_context_t *hdd_ctx = wiphy_priv(wiphy); |
| 197 | struct fw_dump_req fw_mem_dump_req; |
| 198 | struct fw_dump_seg_req *seg_req; |
| 199 | uint8_t loop; |
Anurag Chouhan | 6d76066 | 2016-02-20 16:05:43 +0530 | [diff] [blame] | 200 | qdf_dma_addr_t paddr; |
| 201 | qdf_dma_addr_t dma_ctx = 0; |
Anurag Chouhan | df2b268 | 2016-02-29 14:15:27 +0530 | [diff] [blame] | 202 | qdf_device_t qdf_ctx; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 203 | unsigned long rc; |
| 204 | struct hdd_fw_dump_context *context; |
| 205 | |
Jeff Johnson | 1f61b61 | 2016-02-12 16:28:33 -0800 | [diff] [blame] | 206 | ENTER_DEV(wdev->netdev); |
| 207 | |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 208 | status = wlan_hdd_validate_context(hdd_ctx); |
Abhishek Singh | 23edd1c | 2016-05-05 11:56:06 +0530 | [diff] [blame] | 209 | if (status) |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 210 | return status; |
Abhishek Singh | 23edd1c | 2016-05-05 11:56:06 +0530 | [diff] [blame] | 211 | |
Anurag Chouhan | df2b268 | 2016-02-29 14:15:27 +0530 | [diff] [blame] | 212 | qdf_ctx = cds_get_context(QDF_MODULE_ID_QDF_DEVICE); |
| 213 | if (!qdf_ctx) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 214 | hdd_err("QDF context is NULL"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 215 | return -EINVAL; |
| 216 | } |
| 217 | |
| 218 | if (hdd_ctx->memdump_in_progress) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 219 | hdd_err("Already a memdump req in progress."); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 220 | return -EBUSY; |
| 221 | } |
| 222 | |
| 223 | /* |
| 224 | * Allocate memory for fw memory dump. Memory allocated should be |
| 225 | * contiguous. Physical address of the allocated memory is passed |
| 226 | * to the FW for copy |
| 227 | * |
| 228 | * Reuse the memory if available. |
| 229 | */ |
| 230 | mutex_lock(&hdd_ctx->memdump_lock); |
| 231 | if (!hdd_ctx->fw_dump_loc) { |
Anurag Chouhan | 600c3a0 | 2016-03-01 10:33:54 +0530 | [diff] [blame] | 232 | hdd_ctx->fw_dump_loc = qdf_mem_alloc_consistent( |
| 233 | qdf_ctx, qdf_ctx->dev, FW_MEM_DUMP_SIZE, &paddr); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 234 | if (!hdd_ctx->fw_dump_loc) { |
| 235 | mutex_unlock(&hdd_ctx->memdump_lock); |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 236 | hdd_err("qdf_mem_alloc_consistent failed"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 237 | return -ENOMEM; |
| 238 | } |
| 239 | hdd_ctx->dump_loc_paddr = paddr; |
Manjeet Singh | 0e617d6 | 2016-11-09 16:08:41 +0530 | [diff] [blame] | 240 | } else { |
| 241 | paddr = hdd_ctx->dump_loc_paddr; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 242 | } |
| 243 | mutex_unlock(&hdd_ctx->memdump_lock); |
| 244 | |
| 245 | /* |
| 246 | * Currently request_id and num_seg is assumed to be default(1) |
| 247 | * It is assumed that firmware dump requested is for DRAM section |
| 248 | * only |
| 249 | */ |
| 250 | |
| 251 | fw_mem_dump_req.request_id = FW_MEM_DUMP_REQ_ID; |
| 252 | fw_mem_dump_req.num_seg = FW_MEM_DUMP_NUM_SEG; |
| 253 | |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame^] | 254 | hdd_debug("request_id:%d num_seg:%d", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 255 | fw_mem_dump_req.request_id, fw_mem_dump_req.num_seg); |
| 256 | seg_req = (struct fw_dump_seg_req *) fw_mem_dump_req.segment; |
| 257 | for (loop = 0; loop < fw_mem_dump_req.num_seg; loop++) { |
| 258 | seg_req->seg_id = 1; |
| 259 | seg_req->seg_start_addr_lo = FW_DRAM_LOCATION; |
| 260 | seg_req->seg_start_addr_hi = 0; |
| 261 | seg_req->seg_length = FW_MEM_DUMP_SIZE; |
| 262 | seg_req->dst_addr_lo = hdd_ctx->dump_loc_paddr; |
| 263 | seg_req->dst_addr_hi = 0; |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame^] | 264 | hdd_debug("seg_number:%d", loop); |
| 265 | hdd_debug("seg_id:%d start_addr_lo:0x%x start_addr_hi:0x%x", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 266 | seg_req->seg_id, seg_req->seg_start_addr_lo, |
| 267 | seg_req->seg_start_addr_hi); |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame^] | 268 | hdd_debug("seg_length:%d dst_addr_lo:0x%x dst_addr_hi:0x%x", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 269 | seg_req->seg_length, seg_req->dst_addr_lo, |
| 270 | seg_req->dst_addr_hi); |
| 271 | seg_req++; |
| 272 | } |
| 273 | |
| 274 | /** |
| 275 | * Start the cleanup timer. |
| 276 | * Memory allocated for this request will be freed up |
| 277 | * once the timer expires. Memory dump request is expected to be |
| 278 | * completed by this time. |
| 279 | * |
| 280 | * User space will not be able to access the dump after this time. |
| 281 | * New request should be issued to get the dump again. |
| 282 | */ |
Anurag Chouhan | 210db07 | 2016-02-22 18:42:15 +0530 | [diff] [blame] | 283 | qdf_mc_timer_start(&hdd_ctx->memdump_cleanup_timer, |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 284 | MEMDUMP_COMPLETION_TIME_MS); |
| 285 | hdd_ctx->memdump_in_progress = true; |
| 286 | |
| 287 | spin_lock(&hdd_context_lock); |
| 288 | context = &fw_dump_context; |
| 289 | context->request_id = fw_mem_dump_req.request_id; |
| 290 | INIT_COMPLETION(context->response_event); |
| 291 | spin_unlock(&hdd_context_lock); |
| 292 | |
| 293 | sme_status = sme_fw_mem_dump(hdd_ctx->hHal, &fw_mem_dump_req); |
Anurag Chouhan | fb54ab0 | 2016-02-18 18:00:46 +0530 | [diff] [blame] | 294 | if (QDF_STATUS_SUCCESS != sme_status) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 295 | hdd_err("sme_fw_mem_dump Failed"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 296 | mutex_lock(&hdd_ctx->memdump_lock); |
Anurag Chouhan | f04e84f | 2016-03-03 10:12:12 +0530 | [diff] [blame] | 297 | qdf_mem_free_consistent(qdf_ctx, qdf_ctx->dev, |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 298 | FW_MEM_DUMP_SIZE, hdd_ctx->fw_dump_loc, paddr, dma_ctx); |
| 299 | hdd_ctx->fw_dump_loc = NULL; |
| 300 | mutex_unlock(&hdd_ctx->memdump_lock); |
| 301 | hdd_ctx->memdump_in_progress = false; |
Anurag Chouhan | 210db07 | 2016-02-22 18:42:15 +0530 | [diff] [blame] | 302 | if (QDF_TIMER_STATE_RUNNING == |
| 303 | qdf_mc_timer_get_current_state( |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 304 | &hdd_ctx->memdump_cleanup_timer)) { |
Anurag Chouhan | 210db07 | 2016-02-22 18:42:15 +0530 | [diff] [blame] | 305 | qdf_mc_timer_stop(&hdd_ctx->memdump_cleanup_timer); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 306 | } |
| 307 | return -EINVAL; |
| 308 | } |
| 309 | |
| 310 | rc = wait_for_completion_timeout(&context->response_event, |
| 311 | msecs_to_jiffies(MEMDUMP_COMPLETION_TIME_MS)); |
| 312 | if (!rc) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 313 | hdd_err("Target response timed out for request_id: %d", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 314 | context->request_id); |
| 315 | return -ETIMEDOUT; |
| 316 | } |
| 317 | |
| 318 | status = wlan_hdd_send_memdump_rsp(hdd_ctx); |
| 319 | if (status) |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 320 | hdd_err("Failed to send FW memory dump rsp to user space"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 321 | |
| 322 | return status; |
| 323 | } |
| 324 | |
| 325 | /** |
| 326 | * wlan_hdd_cfg80211_get_fw_mem_dump() - Get FW memory dump |
| 327 | * @wiphy: pointer to wireless wiphy structure. |
| 328 | * @wdev: pointer to wireless_dev structure. |
| 329 | * @data: Pointer to the NL data. |
| 330 | * @data_len:Length of @data |
| 331 | * |
| 332 | * This is called when wlan driver needs to get the firmware memory dump |
| 333 | * via vendor specific command. |
| 334 | * |
| 335 | * Return: 0 on success, error number otherwise. |
| 336 | */ |
| 337 | int wlan_hdd_cfg80211_get_fw_mem_dump(struct wiphy *wiphy, |
| 338 | struct wireless_dev *wdev, |
| 339 | const void *data, int data_len) |
| 340 | { |
| 341 | int ret; |
| 342 | |
| 343 | cds_ssr_protect(__func__); |
| 344 | ret = __wlan_hdd_cfg80211_get_fw_mem_dump(wiphy, wdev, data, data_len); |
| 345 | cds_ssr_unprotect(__func__); |
| 346 | |
| 347 | return ret; |
| 348 | } |
| 349 | |
| 350 | #define PROCFS_MEMDUMP_DIR "debug" |
| 351 | #define PROCFS_MEMDUMP_NAME "fwdump" |
| 352 | #define PROCFS_MEMDUMP_PERM 0444 |
| 353 | |
| 354 | static struct proc_dir_entry *proc_file, *proc_dir; |
| 355 | |
| 356 | /** memdump_get_file_data() - get data available in proc file |
| 357 | * |
| 358 | * @file - handle for the proc file. |
| 359 | * |
| 360 | * This function is used to retrieve the data passed while |
| 361 | * creating proc file entry. |
| 362 | * |
| 363 | * Return: void pointer to hdd_context |
| 364 | */ |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 365 | static void *memdump_get_file_data(struct file *file) |
| 366 | { |
| 367 | void *hdd_ctx; |
| 368 | |
| 369 | hdd_ctx = PDE_DATA(file_inode(file)); |
| 370 | return hdd_ctx; |
| 371 | } |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 372 | |
| 373 | /** |
| 374 | * memdump_read() - perform read operation in memory dump proc file |
| 375 | * |
| 376 | * @file - handle for the proc file. |
| 377 | * @buf - pointer to user space buffer. |
| 378 | * @count - number of bytes to be read. |
| 379 | * @pos - offset in the from buffer. |
| 380 | * |
| 381 | * This function performs read operation for the memory dump proc file. |
| 382 | * |
| 383 | * Return: number of bytes read on success, error code otherwise. |
| 384 | */ |
| 385 | static ssize_t memdump_read(struct file *file, char __user *buf, |
| 386 | size_t count, loff_t *pos) |
| 387 | { |
| 388 | int status; |
| 389 | hdd_context_t *hdd_ctx; |
Anurag Chouhan | 6d76066 | 2016-02-20 16:05:43 +0530 | [diff] [blame] | 390 | qdf_dma_addr_t paddr; |
| 391 | qdf_dma_addr_t dma_ctx = 0; |
Anurag Chouhan | df2b268 | 2016-02-29 14:15:27 +0530 | [diff] [blame] | 392 | qdf_device_t qdf_ctx; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 393 | |
| 394 | hdd_ctx = memdump_get_file_data(file); |
| 395 | |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame^] | 396 | hdd_debug("Read req for size:%zu pos:%llu", count, *pos); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 397 | status = wlan_hdd_validate_context(hdd_ctx); |
Abhishek Singh | 23edd1c | 2016-05-05 11:56:06 +0530 | [diff] [blame] | 398 | if (status) |
| 399 | return status; |
| 400 | |
Anurag Chouhan | df2b268 | 2016-02-29 14:15:27 +0530 | [diff] [blame] | 401 | qdf_ctx = cds_get_context(QDF_MODULE_ID_QDF_DEVICE); |
| 402 | if (!qdf_ctx) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 403 | hdd_err("QDF context is NULL"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 404 | return -EINVAL; |
| 405 | } |
| 406 | |
| 407 | if (!hdd_ctx->memdump_in_progress) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 408 | hdd_err("Current mem dump request timed out/failed"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 409 | return -EINVAL; |
| 410 | } |
| 411 | |
| 412 | if (*pos < 0) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 413 | hdd_err("Invalid start offset for memdump read"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 414 | return -EINVAL; |
| 415 | } else if (*pos >= FW_MEM_DUMP_SIZE || !count) { |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame^] | 416 | hdd_debug("No more data to copy"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 417 | return 0; |
| 418 | } else if (count > FW_MEM_DUMP_SIZE - *pos) { |
| 419 | count = FW_MEM_DUMP_SIZE - *pos; |
| 420 | } |
| 421 | |
| 422 | if (!hdd_ctx->fw_dump_loc) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 423 | hdd_err("Invalid fw mem dump location"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 424 | return -EINVAL; |
| 425 | } |
| 426 | |
| 427 | if (copy_to_user(buf, hdd_ctx->fw_dump_loc + *pos, count)) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 428 | hdd_err("copy to user space failed"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 429 | return -EFAULT; |
| 430 | } |
| 431 | |
| 432 | /* offset(pos) should be updated here based on the copy done*/ |
| 433 | *pos += count; |
| 434 | |
| 435 | /* Entire FW memory dump copy completed */ |
| 436 | if (*pos >= FW_MEM_DUMP_SIZE) { |
| 437 | paddr = hdd_ctx->dump_loc_paddr; |
| 438 | mutex_lock(&hdd_ctx->memdump_lock); |
Anurag Chouhan | f04e84f | 2016-03-03 10:12:12 +0530 | [diff] [blame] | 439 | qdf_mem_free_consistent(qdf_ctx, qdf_ctx->dev, |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 440 | FW_MEM_DUMP_SIZE, hdd_ctx->fw_dump_loc, paddr, dma_ctx); |
| 441 | hdd_ctx->fw_dump_loc = NULL; |
| 442 | hdd_ctx->memdump_in_progress = false; |
Anurag Chouhan | 210db07 | 2016-02-22 18:42:15 +0530 | [diff] [blame] | 443 | if (QDF_TIMER_STATE_RUNNING == |
| 444 | qdf_mc_timer_get_current_state( |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 445 | &hdd_ctx->memdump_cleanup_timer)) { |
Anurag Chouhan | 210db07 | 2016-02-22 18:42:15 +0530 | [diff] [blame] | 446 | qdf_mc_timer_stop(&hdd_ctx->memdump_cleanup_timer); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 447 | } |
| 448 | mutex_unlock(&hdd_ctx->memdump_lock); |
| 449 | } |
| 450 | |
| 451 | return count; |
| 452 | } |
| 453 | |
| 454 | /** |
| 455 | * struct memdump_fops - file operations for memory dump feature |
| 456 | * @read - read function for memory dump operation. |
| 457 | * |
| 458 | * This structure initialize the file operation handle for memory |
| 459 | * dump feature |
| 460 | */ |
| 461 | static const struct file_operations memdump_fops = { |
| 462 | read: memdump_read |
| 463 | }; |
| 464 | |
| 465 | /** |
| 466 | * memdump_procfs_init() - Initialize procfs for memory dump |
| 467 | * |
| 468 | * This function create file under proc file system to be used later for |
| 469 | * processing firmware memory dump |
| 470 | * |
| 471 | * Return: 0 on success, error code otherwise. |
| 472 | */ |
| 473 | static int memdump_procfs_init(void) |
| 474 | { |
| 475 | hdd_context_t *hdd_ctx; |
| 476 | |
Anurag Chouhan | 6d76066 | 2016-02-20 16:05:43 +0530 | [diff] [blame] | 477 | hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 478 | if (!hdd_ctx) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 479 | hdd_err("Invalid HDD context"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 480 | return -EINVAL; |
| 481 | } |
| 482 | |
| 483 | proc_dir = proc_mkdir(PROCFS_MEMDUMP_DIR, NULL); |
| 484 | if (proc_dir == NULL) { |
| 485 | remove_proc_entry(PROCFS_MEMDUMP_DIR, NULL); |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame^] | 486 | pr_debug("Could not initialize /proc/%s\n", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 487 | PROCFS_MEMDUMP_DIR); |
| 488 | return -ENOMEM; |
| 489 | } |
| 490 | |
| 491 | proc_file = proc_create_data(PROCFS_MEMDUMP_NAME, |
| 492 | PROCFS_MEMDUMP_PERM, proc_dir, |
| 493 | &memdump_fops, hdd_ctx); |
| 494 | if (proc_file == NULL) { |
| 495 | remove_proc_entry(PROCFS_MEMDUMP_NAME, proc_dir); |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame^] | 496 | pr_debug("Could not initialize /proc/%s\n", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 497 | PROCFS_MEMDUMP_NAME); |
| 498 | return -ENOMEM; |
| 499 | } |
| 500 | |
| 501 | pr_debug("/proc/%s/%s created\n", PROCFS_MEMDUMP_DIR, |
| 502 | PROCFS_MEMDUMP_NAME); |
| 503 | return 0; |
| 504 | } |
| 505 | |
| 506 | /** |
| 507 | * memdump_procfs_remove() - Remove file/dir under procfs for memory dump |
| 508 | * |
| 509 | * This function removes file/dir under proc file system that was |
| 510 | * processing firmware memory dump |
| 511 | * |
| 512 | * Return: None |
| 513 | */ |
| 514 | static void memdump_procfs_remove(void) |
| 515 | { |
| 516 | remove_proc_entry(PROCFS_MEMDUMP_NAME, proc_dir); |
| 517 | pr_debug("/proc/%s/%s removed\n", PROCFS_MEMDUMP_DIR, |
| 518 | PROCFS_MEMDUMP_NAME); |
| 519 | remove_proc_entry(PROCFS_MEMDUMP_DIR, NULL); |
| 520 | pr_debug("/proc/%s removed\n", PROCFS_MEMDUMP_DIR); |
| 521 | } |
| 522 | |
| 523 | /** |
| 524 | * memdump_init() - Intialization function for memory dump feature |
| 525 | * |
| 526 | * This function creates proc file for memdump feature and registers |
| 527 | * HDD callback function with SME. |
| 528 | * |
| 529 | * Return - 0 on success, error otherwise |
| 530 | */ |
| 531 | int memdump_init(void) |
| 532 | { |
| 533 | hdd_context_t *hdd_ctx; |
| 534 | int status = 0; |
Anurag Chouhan | fb54ab0 | 2016-02-18 18:00:46 +0530 | [diff] [blame] | 535 | QDF_STATUS qdf_status; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 536 | |
Anurag Chouhan | 6d76066 | 2016-02-20 16:05:43 +0530 | [diff] [blame] | 537 | hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 538 | if (!hdd_ctx) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 539 | hdd_err("Invalid HDD context"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 540 | return -EINVAL; |
| 541 | } |
| 542 | |
Anurag Chouhan | 6d76066 | 2016-02-20 16:05:43 +0530 | [diff] [blame] | 543 | if (QDF_GLOBAL_FTM_MODE == hdd_get_conparam()) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 544 | hdd_err("Not initializing memdump in FTM mode"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 545 | return -EINVAL; |
| 546 | } |
| 547 | |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 548 | status = memdump_procfs_init(); |
| 549 | if (status) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 550 | hdd_err("Failed to create proc file"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 551 | return status; |
| 552 | } |
| 553 | |
| 554 | init_completion(&fw_dump_context.response_event); |
| 555 | |
Anurag Chouhan | 210db07 | 2016-02-22 18:42:15 +0530 | [diff] [blame] | 556 | qdf_status = qdf_mc_timer_init(&hdd_ctx->memdump_cleanup_timer, |
Anurag Chouhan | 6d76066 | 2016-02-20 16:05:43 +0530 | [diff] [blame] | 557 | QDF_TIMER_TYPE_SW, memdump_cleanup_timer_cb, |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 558 | (void *)hdd_ctx); |
Anurag Chouhan | fb54ab0 | 2016-02-18 18:00:46 +0530 | [diff] [blame] | 559 | if (!QDF_IS_STATUS_SUCCESS(qdf_status)) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 560 | hdd_err("Failed to init memdump cleanup timer"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 561 | return -EINVAL; |
| 562 | } |
| 563 | |
| 564 | mutex_init(&hdd_ctx->memdump_lock); |
Sachin Ahuja | 02dd2e7 | 2016-09-03 16:17:51 +0530 | [diff] [blame] | 565 | hdd_ctx->memdump_init_done = true; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 566 | |
| 567 | return 0; |
| 568 | } |
| 569 | |
| 570 | /** |
| 571 | * memdump_deinit() - De initialize memdump feature |
| 572 | * |
| 573 | * This function removes proc file created for memdump feature. |
| 574 | * |
| 575 | * Return: None |
| 576 | */ |
| 577 | void memdump_deinit(void) |
| 578 | { |
| 579 | hdd_context_t *hdd_ctx; |
Anurag Chouhan | 6d76066 | 2016-02-20 16:05:43 +0530 | [diff] [blame] | 580 | qdf_dma_addr_t paddr; |
| 581 | qdf_dma_addr_t dma_ctx = 0; |
Anurag Chouhan | df2b268 | 2016-02-29 14:15:27 +0530 | [diff] [blame] | 582 | qdf_device_t qdf_ctx; |
Anurag Chouhan | fb54ab0 | 2016-02-18 18:00:46 +0530 | [diff] [blame] | 583 | QDF_STATUS qdf_status; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 584 | |
Anurag Chouhan | 6d76066 | 2016-02-20 16:05:43 +0530 | [diff] [blame] | 585 | hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 586 | if (!hdd_ctx) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 587 | hdd_err("Invalid HDD context"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 588 | return; |
| 589 | } |
| 590 | |
Anurag Chouhan | 6d76066 | 2016-02-20 16:05:43 +0530 | [diff] [blame] | 591 | if (QDF_GLOBAL_FTM_MODE == hdd_get_conparam()) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 592 | hdd_err("Not deinitializing memdump in FTM mode"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 593 | return; |
| 594 | } |
| 595 | |
Sachin Ahuja | 02dd2e7 | 2016-09-03 16:17:51 +0530 | [diff] [blame] | 596 | if (!hdd_ctx->memdump_init_done) { |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame^] | 597 | hdd_warn("MemDump not initialized"); |
Sachin Ahuja | 02dd2e7 | 2016-09-03 16:17:51 +0530 | [diff] [blame] | 598 | return; |
| 599 | } |
| 600 | hdd_ctx->memdump_init_done = false; |
| 601 | |
Anurag Chouhan | df2b268 | 2016-02-29 14:15:27 +0530 | [diff] [blame] | 602 | qdf_ctx = cds_get_context(QDF_MODULE_ID_QDF_DEVICE); |
| 603 | if (!qdf_ctx) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 604 | hdd_err("QDF context is NULL"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 605 | return; |
| 606 | } |
| 607 | |
| 608 | memdump_procfs_remove(); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 609 | |
| 610 | mutex_lock(&hdd_ctx->memdump_lock); |
| 611 | if (hdd_ctx->fw_dump_loc) { |
| 612 | paddr = hdd_ctx->dump_loc_paddr; |
Anurag Chouhan | f04e84f | 2016-03-03 10:12:12 +0530 | [diff] [blame] | 613 | qdf_mem_free_consistent(qdf_ctx, qdf_ctx->dev, |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 614 | FW_MEM_DUMP_SIZE, hdd_ctx->fw_dump_loc, paddr, dma_ctx); |
| 615 | hdd_ctx->fw_dump_loc = NULL; |
| 616 | hdd_ctx->memdump_in_progress = false; |
| 617 | } |
| 618 | mutex_unlock(&hdd_ctx->memdump_lock); |
Sachin Ahuja | 02dd2e7 | 2016-09-03 16:17:51 +0530 | [diff] [blame] | 619 | mutex_destroy(&hdd_ctx->memdump_lock); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 620 | |
Anurag Chouhan | 210db07 | 2016-02-22 18:42:15 +0530 | [diff] [blame] | 621 | if (QDF_TIMER_STATE_RUNNING == |
| 622 | qdf_mc_timer_get_current_state(&hdd_ctx->memdump_cleanup_timer)) { |
| 623 | qdf_mc_timer_stop(&hdd_ctx->memdump_cleanup_timer); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 624 | } |
| 625 | |
Anurag Chouhan | 210db07 | 2016-02-22 18:42:15 +0530 | [diff] [blame] | 626 | qdf_status = qdf_mc_timer_destroy(&hdd_ctx->memdump_cleanup_timer); |
Anurag Chouhan | fb54ab0 | 2016-02-18 18:00:46 +0530 | [diff] [blame] | 627 | if (!QDF_IS_STATUS_SUCCESS(qdf_status)) |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 628 | hdd_err("Failed to deallocate timer"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 629 | } |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 630 | |
| 631 | #ifdef MULTI_IF_NAME |
| 632 | #define PROCFS_DRIVER_DUMP_DIR "debugdriver" MULTI_IF_NAME |
| 633 | #else |
| 634 | #define PROCFS_DRIVER_DUMP_DIR "debugdriver" |
| 635 | #endif |
| 636 | #define PROCFS_DRIVER_DUMP_NAME "driverdump" |
| 637 | #define PROCFS_DRIVER_DUMP_PERM 0444 |
| 638 | |
| 639 | static struct proc_dir_entry *proc_file_driver, *proc_dir_driver; |
| 640 | |
| 641 | /** |
| 642 | * hdd_driver_mem_cleanup() - Frees memory allocated for |
| 643 | * driver dump |
| 644 | * |
| 645 | * This function unallocates driver dump memory. |
| 646 | * |
| 647 | * Return: None |
| 648 | */ |
| 649 | static void hdd_driver_mem_cleanup(void) |
| 650 | { |
| 651 | hdd_context_t *hdd_ctx; |
| 652 | |
| 653 | hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD); |
| 654 | if (!hdd_ctx) { |
| 655 | hdd_err("Invalid HDD context"); |
| 656 | return; |
| 657 | } |
| 658 | |
| 659 | if (hdd_ctx->driver_dump_mem) { |
| 660 | qdf_mem_free(hdd_ctx->driver_dump_mem); |
| 661 | hdd_ctx->driver_dump_mem = NULL; |
| 662 | } |
| 663 | } |
| 664 | |
| 665 | |
| 666 | /** |
| 667 | * hdd_driver_memdump_read() - perform read operation in driver |
| 668 | * memory dump proc file |
| 669 | * @file - handle for the proc file. |
| 670 | * @buf - pointer to user space buffer. |
| 671 | * @count - number of bytes to be read. |
| 672 | * @pos - offset in the from buffer. |
| 673 | * |
| 674 | * This function performs read operation for the driver memory dump proc file. |
| 675 | * |
| 676 | * Return: number of bytes read on success, error code otherwise. |
| 677 | */ |
| 678 | static ssize_t hdd_driver_memdump_read(struct file *file, char __user *buf, |
| 679 | size_t count, loff_t *pos) |
| 680 | { |
| 681 | int status; |
| 682 | QDF_STATUS qdf_status; |
| 683 | hdd_context_t *hdd_ctx; |
| 684 | size_t no_of_bytes_read = 0; |
| 685 | |
| 686 | hdd_ctx = memdump_get_file_data(file); |
| 687 | |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame^] | 688 | hdd_debug("Read req for size:%zu pos:%llu", count, *pos); |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 689 | status = wlan_hdd_validate_context(hdd_ctx); |
| 690 | if (status != 0) |
| 691 | return -EINVAL; |
| 692 | |
SaidiReddy Yenuga | c3a74ba | 2017-03-08 16:17:55 +0530 | [diff] [blame] | 693 | mutex_lock(&hdd_ctx->memdump_lock); |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 694 | if (*pos < 0) { |
| 695 | hdd_err("Invalid start offset for memdump read"); |
SaidiReddy Yenuga | c3a74ba | 2017-03-08 16:17:55 +0530 | [diff] [blame] | 696 | mutex_unlock(&hdd_ctx->memdump_lock); |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 697 | return -EINVAL; |
| 698 | } else if (!count || (hdd_ctx->driver_dump_size && |
| 699 | (*pos >= hdd_ctx->driver_dump_size))) { |
SaidiReddy Yenuga | c3a74ba | 2017-03-08 16:17:55 +0530 | [diff] [blame] | 700 | mutex_unlock(&hdd_ctx->memdump_lock); |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame^] | 701 | hdd_debug("No more data to copy"); |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 702 | return 0; |
| 703 | } else if ((*pos == 0) || (hdd_ctx->driver_dump_mem == NULL)) { |
| 704 | /* |
| 705 | * Allocate memory for Driver memory dump. |
| 706 | */ |
| 707 | if (!hdd_ctx->driver_dump_mem) { |
| 708 | hdd_ctx->driver_dump_mem = |
| 709 | qdf_mem_malloc(DRIVER_MEM_DUMP_SIZE); |
| 710 | if (!hdd_ctx->driver_dump_mem) { |
| 711 | hdd_err("qdf_mem_malloc failed"); |
SaidiReddy Yenuga | c3a74ba | 2017-03-08 16:17:55 +0530 | [diff] [blame] | 712 | mutex_unlock(&hdd_ctx->memdump_lock); |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 713 | return -ENOMEM; |
| 714 | } |
| 715 | } |
| 716 | |
| 717 | qdf_status = qdf_state_info_dump_all(hdd_ctx->driver_dump_mem, |
| 718 | DRIVER_MEM_DUMP_SIZE, |
| 719 | &hdd_ctx->driver_dump_size); |
| 720 | /* |
| 721 | * If qdf_status is QDF_STATUS_E_NOMEM, then memory allocated is |
| 722 | * insufficient to dump driver information. This print can give |
| 723 | * information to allocate more memory if more information from |
| 724 | * each layer is added in future. |
| 725 | */ |
| 726 | if (qdf_status != QDF_STATUS_SUCCESS) |
| 727 | hdd_err("Error in dump driver information, status %d", |
| 728 | qdf_status); |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame^] | 729 | hdd_debug("driver_dump_size: %d", |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 730 | hdd_ctx->driver_dump_size); |
| 731 | } |
| 732 | |
| 733 | if (count > hdd_ctx->driver_dump_size - *pos) |
| 734 | no_of_bytes_read = hdd_ctx->driver_dump_size - *pos; |
| 735 | else |
| 736 | no_of_bytes_read = count; |
| 737 | |
| 738 | if (copy_to_user(buf, hdd_ctx->driver_dump_mem + *pos, |
| 739 | no_of_bytes_read)) { |
| 740 | hdd_err("copy to user space failed"); |
SaidiReddy Yenuga | c3a74ba | 2017-03-08 16:17:55 +0530 | [diff] [blame] | 741 | mutex_unlock(&hdd_ctx->memdump_lock); |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 742 | return -EFAULT; |
| 743 | } |
| 744 | |
| 745 | /* offset(pos) should be updated here based on the copy done */ |
| 746 | *pos += no_of_bytes_read; |
| 747 | |
| 748 | /* Entire driver memory dump copy completed */ |
| 749 | if (*pos >= hdd_ctx->driver_dump_size) |
| 750 | hdd_driver_mem_cleanup(); |
| 751 | |
SaidiReddy Yenuga | c3a74ba | 2017-03-08 16:17:55 +0530 | [diff] [blame] | 752 | mutex_unlock(&hdd_ctx->memdump_lock); |
| 753 | |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 754 | return no_of_bytes_read; |
| 755 | } |
| 756 | |
| 757 | |
| 758 | /** |
| 759 | * struct driver_dump_fops - file operations for driver dump feature |
| 760 | * @read - read function for driver dump operation. |
| 761 | * |
| 762 | * This structure initialize the file operation handle for memory |
| 763 | * dump feature |
| 764 | */ |
| 765 | static const struct file_operations driver_dump_fops = { |
| 766 | read: hdd_driver_memdump_read |
| 767 | }; |
| 768 | |
| 769 | /** |
| 770 | * hdd_driver_memdump_procfs_init() - Initialize procfs for driver memory dump |
| 771 | * |
| 772 | * This function create file under proc file system to be used later for |
| 773 | * processing driver memory dump |
| 774 | * |
| 775 | * Return: 0 on success, error code otherwise. |
| 776 | */ |
| 777 | static int hdd_driver_memdump_procfs_init(void) |
| 778 | { |
| 779 | hdd_context_t *hdd_ctx; |
| 780 | |
| 781 | hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD); |
| 782 | if (!hdd_ctx) { |
| 783 | hdd_err("Invalid HDD context"); |
| 784 | return -EINVAL; |
| 785 | } |
| 786 | |
| 787 | proc_dir_driver = proc_mkdir(PROCFS_DRIVER_DUMP_DIR, NULL); |
| 788 | if (proc_dir_driver == NULL) { |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame^] | 789 | pr_debug("Could not initialize /proc/%s\n", |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 790 | PROCFS_DRIVER_DUMP_DIR); |
| 791 | return -ENOMEM; |
| 792 | } |
| 793 | |
| 794 | proc_file_driver = proc_create_data(PROCFS_DRIVER_DUMP_NAME, |
| 795 | PROCFS_DRIVER_DUMP_PERM, proc_dir_driver, |
| 796 | &driver_dump_fops, hdd_ctx); |
| 797 | if (proc_file_driver == NULL) { |
| 798 | remove_proc_entry(PROCFS_DRIVER_DUMP_NAME, proc_dir_driver); |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame^] | 799 | pr_debug("Could not initialize /proc/%s\n", |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 800 | PROCFS_DRIVER_DUMP_NAME); |
| 801 | return -ENOMEM; |
| 802 | } |
| 803 | |
| 804 | pr_debug("/proc/%s/%s created\n", PROCFS_DRIVER_DUMP_DIR, |
| 805 | PROCFS_DRIVER_DUMP_NAME); |
| 806 | return 0; |
| 807 | } |
| 808 | |
| 809 | /** |
| 810 | * hdd_driver_memdump_procfs_remove() - Remove file/dir under procfs |
| 811 | * for driver memory dump |
| 812 | * |
| 813 | * This function removes file/dir under proc file system that was |
| 814 | * processing driver memory dump |
| 815 | * |
| 816 | * Return: None |
| 817 | */ |
| 818 | static void hdd_driver_memdump_procfs_remove(void) |
| 819 | { |
| 820 | remove_proc_entry(PROCFS_DRIVER_DUMP_NAME, proc_dir_driver); |
| 821 | pr_debug("/proc/%s/%s removed\n", PROCFS_DRIVER_DUMP_DIR, |
| 822 | PROCFS_DRIVER_DUMP_NAME); |
| 823 | remove_proc_entry(PROCFS_DRIVER_DUMP_DIR, NULL); |
| 824 | pr_debug("/proc/%s removed\n", PROCFS_DRIVER_DUMP_DIR); |
| 825 | } |
| 826 | |
| 827 | /** |
| 828 | * hdd_driver_memdump_init() - Intialization function for driver |
| 829 | * memory dump feature |
| 830 | * |
| 831 | * This function creates proc file for driver memdump feature |
| 832 | * |
| 833 | * Return - 0 on success, error otherwise |
| 834 | */ |
| 835 | int hdd_driver_memdump_init(void) |
| 836 | { |
| 837 | int status; |
| 838 | |
| 839 | if (hdd_get_conparam() == QDF_GLOBAL_FTM_MODE) { |
| 840 | hdd_err("Not initializing memdump in FTM mode"); |
| 841 | return -EINVAL; |
| 842 | } |
| 843 | |
| 844 | status = hdd_driver_memdump_procfs_init(); |
| 845 | if (status) { |
| 846 | hdd_err("Failed to create proc file"); |
| 847 | return status; |
| 848 | } |
| 849 | |
| 850 | return 0; |
| 851 | } |
| 852 | |
| 853 | /** |
| 854 | * hdd_driver_memdump_deinit() - De initialize driver memdump feature |
| 855 | * |
| 856 | * This function removes proc file created for driver memdump feature. |
| 857 | * |
| 858 | * Return: None |
| 859 | */ |
| 860 | void hdd_driver_memdump_deinit(void) |
| 861 | { |
| 862 | if (hdd_get_conparam() == QDF_GLOBAL_FTM_MODE) { |
| 863 | hdd_err("Not deinitializing memdump in FTM mode"); |
| 864 | return; |
| 865 | } |
| 866 | |
| 867 | hdd_driver_memdump_procfs_remove(); |
| 868 | |
| 869 | hdd_driver_mem_cleanup(); |
| 870 | } |