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; |
Jeff Johnson | 6654917 | 2017-08-28 11:53:14 -0700 | [diff] [blame^] | 69 | struct hdd_context *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 | { |
Jeff Johnson | 6654917 | 2017-08-28 11:53:14 -0700 | [diff] [blame^] | 113 | struct hdd_context *hdd_ctx = ctx; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 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 | */ |
Jeff Johnson | 6654917 | 2017-08-28 11:53:14 -0700 | [diff] [blame^] | 145 | static int wlan_hdd_send_memdump_rsp(struct hdd_context *hdd_ctx) |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 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; |
Jeff Johnson | 6654917 | 2017-08-28 11:53:14 -0700 | [diff] [blame^] | 196 | struct hdd_context *hdd_ctx = wiphy_priv(wiphy); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 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; |
Jeff Johnson | 6654917 | 2017-08-28 11:53:14 -0700 | [diff] [blame^] | 389 | struct hdd_context *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 | |
Ashish Kumar Dhanotiya | 1f75a53 | 2017-04-07 13:03:36 +0530 | [diff] [blame] | 407 | mutex_lock(&hdd_ctx->memdump_lock); |
| 408 | |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 409 | if (!hdd_ctx->memdump_in_progress) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 410 | hdd_err("Current mem dump request timed out/failed"); |
Ashish Kumar Dhanotiya | 1f75a53 | 2017-04-07 13:03:36 +0530 | [diff] [blame] | 411 | status = -EINVAL; |
| 412 | goto memdump_read_fail; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 413 | } |
| 414 | |
| 415 | if (*pos < 0) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 416 | hdd_err("Invalid start offset for memdump read"); |
Ashish Kumar Dhanotiya | 1f75a53 | 2017-04-07 13:03:36 +0530 | [diff] [blame] | 417 | status = -EINVAL; |
| 418 | goto memdump_read_fail; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 419 | } else if (*pos >= FW_MEM_DUMP_SIZE || !count) { |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame] | 420 | hdd_debug("No more data to copy"); |
Ashish Kumar Dhanotiya | 1f75a53 | 2017-04-07 13:03:36 +0530 | [diff] [blame] | 421 | status = 0; |
| 422 | goto memdump_read_fail; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 423 | } else if (count > FW_MEM_DUMP_SIZE - *pos) { |
| 424 | count = FW_MEM_DUMP_SIZE - *pos; |
| 425 | } |
| 426 | |
| 427 | if (!hdd_ctx->fw_dump_loc) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 428 | hdd_err("Invalid fw mem dump location"); |
Ashish Kumar Dhanotiya | 1f75a53 | 2017-04-07 13:03:36 +0530 | [diff] [blame] | 429 | status = -EINVAL; |
| 430 | goto memdump_read_fail; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 431 | } |
| 432 | |
| 433 | if (copy_to_user(buf, hdd_ctx->fw_dump_loc + *pos, count)) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 434 | hdd_err("copy to user space failed"); |
Ashish Kumar Dhanotiya | 1f75a53 | 2017-04-07 13:03:36 +0530 | [diff] [blame] | 435 | status = -EFAULT; |
| 436 | goto memdump_read_fail; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 437 | } |
| 438 | |
| 439 | /* offset(pos) should be updated here based on the copy done*/ |
| 440 | *pos += count; |
| 441 | |
| 442 | /* Entire FW memory dump copy completed */ |
| 443 | if (*pos >= FW_MEM_DUMP_SIZE) { |
| 444 | paddr = hdd_ctx->dump_loc_paddr; |
Anurag Chouhan | f04e84f | 2016-03-03 10:12:12 +0530 | [diff] [blame] | 445 | qdf_mem_free_consistent(qdf_ctx, qdf_ctx->dev, |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 446 | FW_MEM_DUMP_SIZE, hdd_ctx->fw_dump_loc, paddr, dma_ctx); |
| 447 | hdd_ctx->fw_dump_loc = NULL; |
| 448 | hdd_ctx->memdump_in_progress = false; |
Anurag Chouhan | 210db07 | 2016-02-22 18:42:15 +0530 | [diff] [blame] | 449 | if (QDF_TIMER_STATE_RUNNING == |
| 450 | qdf_mc_timer_get_current_state( |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 451 | &hdd_ctx->memdump_cleanup_timer)) { |
Anurag Chouhan | 210db07 | 2016-02-22 18:42:15 +0530 | [diff] [blame] | 452 | qdf_mc_timer_stop(&hdd_ctx->memdump_cleanup_timer); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 453 | } |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 454 | |
Ashish Kumar Dhanotiya | 1f75a53 | 2017-04-07 13:03:36 +0530 | [diff] [blame] | 455 | } |
| 456 | status = count; |
| 457 | memdump_read_fail: |
| 458 | mutex_unlock(&hdd_ctx->memdump_lock); |
| 459 | return status; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 460 | } |
| 461 | |
| 462 | /** |
| 463 | * struct memdump_fops - file operations for memory dump feature |
| 464 | * @read - read function for memory dump operation. |
| 465 | * |
| 466 | * This structure initialize the file operation handle for memory |
| 467 | * dump feature |
| 468 | */ |
| 469 | static const struct file_operations memdump_fops = { |
| 470 | read: memdump_read |
| 471 | }; |
| 472 | |
| 473 | /** |
| 474 | * memdump_procfs_init() - Initialize procfs for memory dump |
| 475 | * |
| 476 | * This function create file under proc file system to be used later for |
| 477 | * processing firmware memory dump |
| 478 | * |
| 479 | * Return: 0 on success, error code otherwise. |
| 480 | */ |
| 481 | static int memdump_procfs_init(void) |
| 482 | { |
Jeff Johnson | 6654917 | 2017-08-28 11:53:14 -0700 | [diff] [blame^] | 483 | struct hdd_context *hdd_ctx; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 484 | |
Anurag Chouhan | 6d76066 | 2016-02-20 16:05:43 +0530 | [diff] [blame] | 485 | hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 486 | if (!hdd_ctx) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 487 | hdd_err("Invalid HDD context"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 488 | return -EINVAL; |
| 489 | } |
| 490 | |
| 491 | proc_dir = proc_mkdir(PROCFS_MEMDUMP_DIR, NULL); |
| 492 | if (proc_dir == NULL) { |
| 493 | remove_proc_entry(PROCFS_MEMDUMP_DIR, NULL); |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame] | 494 | pr_debug("Could not initialize /proc/%s\n", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 495 | PROCFS_MEMDUMP_DIR); |
| 496 | return -ENOMEM; |
| 497 | } |
| 498 | |
| 499 | proc_file = proc_create_data(PROCFS_MEMDUMP_NAME, |
| 500 | PROCFS_MEMDUMP_PERM, proc_dir, |
| 501 | &memdump_fops, hdd_ctx); |
| 502 | if (proc_file == NULL) { |
| 503 | remove_proc_entry(PROCFS_MEMDUMP_NAME, proc_dir); |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame] | 504 | pr_debug("Could not initialize /proc/%s\n", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 505 | PROCFS_MEMDUMP_NAME); |
| 506 | return -ENOMEM; |
| 507 | } |
| 508 | |
| 509 | pr_debug("/proc/%s/%s created\n", PROCFS_MEMDUMP_DIR, |
| 510 | PROCFS_MEMDUMP_NAME); |
| 511 | return 0; |
| 512 | } |
| 513 | |
| 514 | /** |
| 515 | * memdump_procfs_remove() - Remove file/dir under procfs for memory dump |
| 516 | * |
| 517 | * This function removes file/dir under proc file system that was |
| 518 | * processing firmware memory dump |
| 519 | * |
| 520 | * Return: None |
| 521 | */ |
| 522 | static void memdump_procfs_remove(void) |
| 523 | { |
| 524 | remove_proc_entry(PROCFS_MEMDUMP_NAME, proc_dir); |
| 525 | pr_debug("/proc/%s/%s removed\n", PROCFS_MEMDUMP_DIR, |
| 526 | PROCFS_MEMDUMP_NAME); |
| 527 | remove_proc_entry(PROCFS_MEMDUMP_DIR, NULL); |
| 528 | pr_debug("/proc/%s removed\n", PROCFS_MEMDUMP_DIR); |
| 529 | } |
| 530 | |
| 531 | /** |
| 532 | * memdump_init() - Intialization function for memory dump feature |
| 533 | * |
| 534 | * This function creates proc file for memdump feature and registers |
| 535 | * HDD callback function with SME. |
| 536 | * |
| 537 | * Return - 0 on success, error otherwise |
| 538 | */ |
| 539 | int memdump_init(void) |
| 540 | { |
Jeff Johnson | 6654917 | 2017-08-28 11:53:14 -0700 | [diff] [blame^] | 541 | struct hdd_context *hdd_ctx; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 542 | int status = 0; |
Anurag Chouhan | fb54ab0 | 2016-02-18 18:00:46 +0530 | [diff] [blame] | 543 | QDF_STATUS qdf_status; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 544 | |
Anurag Chouhan | 6d76066 | 2016-02-20 16:05:43 +0530 | [diff] [blame] | 545 | hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 546 | if (!hdd_ctx) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 547 | hdd_err("Invalid HDD context"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 548 | return -EINVAL; |
| 549 | } |
| 550 | |
Anurag Chouhan | 6d76066 | 2016-02-20 16:05:43 +0530 | [diff] [blame] | 551 | if (QDF_GLOBAL_FTM_MODE == hdd_get_conparam()) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 552 | hdd_err("Not initializing memdump in FTM mode"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 553 | return -EINVAL; |
| 554 | } |
| 555 | |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 556 | status = memdump_procfs_init(); |
| 557 | if (status) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 558 | hdd_err("Failed to create proc file"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 559 | return status; |
| 560 | } |
| 561 | |
| 562 | init_completion(&fw_dump_context.response_event); |
| 563 | |
Anurag Chouhan | 210db07 | 2016-02-22 18:42:15 +0530 | [diff] [blame] | 564 | qdf_status = qdf_mc_timer_init(&hdd_ctx->memdump_cleanup_timer, |
Anurag Chouhan | 6d76066 | 2016-02-20 16:05:43 +0530 | [diff] [blame] | 565 | QDF_TIMER_TYPE_SW, memdump_cleanup_timer_cb, |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 566 | (void *)hdd_ctx); |
Anurag Chouhan | fb54ab0 | 2016-02-18 18:00:46 +0530 | [diff] [blame] | 567 | if (!QDF_IS_STATUS_SUCCESS(qdf_status)) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 568 | hdd_err("Failed to init memdump cleanup timer"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 569 | return -EINVAL; |
| 570 | } |
| 571 | |
| 572 | mutex_init(&hdd_ctx->memdump_lock); |
Sachin Ahuja | 02dd2e7 | 2016-09-03 16:17:51 +0530 | [diff] [blame] | 573 | hdd_ctx->memdump_init_done = true; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 574 | |
| 575 | return 0; |
| 576 | } |
| 577 | |
| 578 | /** |
| 579 | * memdump_deinit() - De initialize memdump feature |
| 580 | * |
| 581 | * This function removes proc file created for memdump feature. |
| 582 | * |
| 583 | * Return: None |
| 584 | */ |
| 585 | void memdump_deinit(void) |
| 586 | { |
Jeff Johnson | 6654917 | 2017-08-28 11:53:14 -0700 | [diff] [blame^] | 587 | struct hdd_context *hdd_ctx; |
Anurag Chouhan | 6d76066 | 2016-02-20 16:05:43 +0530 | [diff] [blame] | 588 | qdf_dma_addr_t paddr; |
| 589 | qdf_dma_addr_t dma_ctx = 0; |
Anurag Chouhan | df2b268 | 2016-02-29 14:15:27 +0530 | [diff] [blame] | 590 | qdf_device_t qdf_ctx; |
Anurag Chouhan | fb54ab0 | 2016-02-18 18:00:46 +0530 | [diff] [blame] | 591 | QDF_STATUS qdf_status; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 592 | |
Anurag Chouhan | 6d76066 | 2016-02-20 16:05:43 +0530 | [diff] [blame] | 593 | hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 594 | if (!hdd_ctx) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 595 | hdd_err("Invalid HDD context"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 596 | return; |
| 597 | } |
| 598 | |
Anurag Chouhan | 6d76066 | 2016-02-20 16:05:43 +0530 | [diff] [blame] | 599 | if (QDF_GLOBAL_FTM_MODE == hdd_get_conparam()) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 600 | hdd_err("Not deinitializing memdump in FTM mode"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 601 | return; |
| 602 | } |
| 603 | |
Sachin Ahuja | 02dd2e7 | 2016-09-03 16:17:51 +0530 | [diff] [blame] | 604 | if (!hdd_ctx->memdump_init_done) { |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame] | 605 | hdd_warn("MemDump not initialized"); |
Sachin Ahuja | 02dd2e7 | 2016-09-03 16:17:51 +0530 | [diff] [blame] | 606 | return; |
| 607 | } |
| 608 | hdd_ctx->memdump_init_done = false; |
| 609 | |
Anurag Chouhan | df2b268 | 2016-02-29 14:15:27 +0530 | [diff] [blame] | 610 | qdf_ctx = cds_get_context(QDF_MODULE_ID_QDF_DEVICE); |
| 611 | if (!qdf_ctx) { |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 612 | hdd_err("QDF context is NULL"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 613 | return; |
| 614 | } |
| 615 | |
| 616 | memdump_procfs_remove(); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 617 | |
| 618 | mutex_lock(&hdd_ctx->memdump_lock); |
| 619 | if (hdd_ctx->fw_dump_loc) { |
| 620 | paddr = hdd_ctx->dump_loc_paddr; |
Anurag Chouhan | f04e84f | 2016-03-03 10:12:12 +0530 | [diff] [blame] | 621 | qdf_mem_free_consistent(qdf_ctx, qdf_ctx->dev, |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 622 | FW_MEM_DUMP_SIZE, hdd_ctx->fw_dump_loc, paddr, dma_ctx); |
| 623 | hdd_ctx->fw_dump_loc = NULL; |
| 624 | hdd_ctx->memdump_in_progress = false; |
| 625 | } |
| 626 | mutex_unlock(&hdd_ctx->memdump_lock); |
Sachin Ahuja | 02dd2e7 | 2016-09-03 16:17:51 +0530 | [diff] [blame] | 627 | mutex_destroy(&hdd_ctx->memdump_lock); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 628 | |
Anurag Chouhan | 210db07 | 2016-02-22 18:42:15 +0530 | [diff] [blame] | 629 | if (QDF_TIMER_STATE_RUNNING == |
| 630 | qdf_mc_timer_get_current_state(&hdd_ctx->memdump_cleanup_timer)) { |
| 631 | qdf_mc_timer_stop(&hdd_ctx->memdump_cleanup_timer); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 632 | } |
| 633 | |
Anurag Chouhan | 210db07 | 2016-02-22 18:42:15 +0530 | [diff] [blame] | 634 | qdf_status = qdf_mc_timer_destroy(&hdd_ctx->memdump_cleanup_timer); |
Anurag Chouhan | fb54ab0 | 2016-02-18 18:00:46 +0530 | [diff] [blame] | 635 | if (!QDF_IS_STATUS_SUCCESS(qdf_status)) |
Jeff Johnson | ca1b32b | 2016-08-02 15:25:05 -0700 | [diff] [blame] | 636 | hdd_err("Failed to deallocate timer"); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 637 | } |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 638 | |
| 639 | #ifdef MULTI_IF_NAME |
| 640 | #define PROCFS_DRIVER_DUMP_DIR "debugdriver" MULTI_IF_NAME |
| 641 | #else |
| 642 | #define PROCFS_DRIVER_DUMP_DIR "debugdriver" |
| 643 | #endif |
| 644 | #define PROCFS_DRIVER_DUMP_NAME "driverdump" |
| 645 | #define PROCFS_DRIVER_DUMP_PERM 0444 |
| 646 | |
| 647 | static struct proc_dir_entry *proc_file_driver, *proc_dir_driver; |
| 648 | |
| 649 | /** |
| 650 | * hdd_driver_mem_cleanup() - Frees memory allocated for |
| 651 | * driver dump |
| 652 | * |
| 653 | * This function unallocates driver dump memory. |
| 654 | * |
| 655 | * Return: None |
| 656 | */ |
| 657 | static void hdd_driver_mem_cleanup(void) |
| 658 | { |
Jeff Johnson | 6654917 | 2017-08-28 11:53:14 -0700 | [diff] [blame^] | 659 | struct hdd_context *hdd_ctx; |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 660 | |
| 661 | hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD); |
| 662 | if (!hdd_ctx) { |
| 663 | hdd_err("Invalid HDD context"); |
| 664 | return; |
| 665 | } |
| 666 | |
| 667 | if (hdd_ctx->driver_dump_mem) { |
| 668 | qdf_mem_free(hdd_ctx->driver_dump_mem); |
| 669 | hdd_ctx->driver_dump_mem = NULL; |
| 670 | } |
| 671 | } |
| 672 | |
| 673 | |
| 674 | /** |
| 675 | * hdd_driver_memdump_read() - perform read operation in driver |
| 676 | * memory dump proc file |
| 677 | * @file - handle for the proc file. |
| 678 | * @buf - pointer to user space buffer. |
| 679 | * @count - number of bytes to be read. |
| 680 | * @pos - offset in the from buffer. |
| 681 | * |
| 682 | * This function performs read operation for the driver memory dump proc file. |
| 683 | * |
| 684 | * Return: number of bytes read on success, error code otherwise. |
| 685 | */ |
| 686 | static ssize_t hdd_driver_memdump_read(struct file *file, char __user *buf, |
| 687 | size_t count, loff_t *pos) |
| 688 | { |
| 689 | int status; |
| 690 | QDF_STATUS qdf_status; |
Jeff Johnson | 6654917 | 2017-08-28 11:53:14 -0700 | [diff] [blame^] | 691 | struct hdd_context *hdd_ctx; |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 692 | size_t no_of_bytes_read = 0; |
| 693 | |
| 694 | hdd_ctx = memdump_get_file_data(file); |
| 695 | |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame] | 696 | hdd_debug("Read req for size:%zu pos:%llu", count, *pos); |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 697 | status = wlan_hdd_validate_context(hdd_ctx); |
| 698 | if (status != 0) |
| 699 | return -EINVAL; |
| 700 | |
SaidiReddy Yenuga | c3a74ba | 2017-03-08 16:17:55 +0530 | [diff] [blame] | 701 | mutex_lock(&hdd_ctx->memdump_lock); |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 702 | if (*pos < 0) { |
| 703 | hdd_err("Invalid start offset for memdump read"); |
SaidiReddy Yenuga | c3a74ba | 2017-03-08 16:17:55 +0530 | [diff] [blame] | 704 | mutex_unlock(&hdd_ctx->memdump_lock); |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 705 | return -EINVAL; |
| 706 | } else if (!count || (hdd_ctx->driver_dump_size && |
| 707 | (*pos >= hdd_ctx->driver_dump_size))) { |
SaidiReddy Yenuga | c3a74ba | 2017-03-08 16:17:55 +0530 | [diff] [blame] | 708 | mutex_unlock(&hdd_ctx->memdump_lock); |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame] | 709 | hdd_debug("No more data to copy"); |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 710 | return 0; |
| 711 | } else if ((*pos == 0) || (hdd_ctx->driver_dump_mem == NULL)) { |
| 712 | /* |
| 713 | * Allocate memory for Driver memory dump. |
| 714 | */ |
| 715 | if (!hdd_ctx->driver_dump_mem) { |
| 716 | hdd_ctx->driver_dump_mem = |
| 717 | qdf_mem_malloc(DRIVER_MEM_DUMP_SIZE); |
| 718 | if (!hdd_ctx->driver_dump_mem) { |
| 719 | hdd_err("qdf_mem_malloc failed"); |
SaidiReddy Yenuga | c3a74ba | 2017-03-08 16:17:55 +0530 | [diff] [blame] | 720 | mutex_unlock(&hdd_ctx->memdump_lock); |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 721 | return -ENOMEM; |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | qdf_status = qdf_state_info_dump_all(hdd_ctx->driver_dump_mem, |
| 726 | DRIVER_MEM_DUMP_SIZE, |
| 727 | &hdd_ctx->driver_dump_size); |
| 728 | /* |
| 729 | * If qdf_status is QDF_STATUS_E_NOMEM, then memory allocated is |
| 730 | * insufficient to dump driver information. This print can give |
| 731 | * information to allocate more memory if more information from |
| 732 | * each layer is added in future. |
| 733 | */ |
| 734 | if (qdf_status != QDF_STATUS_SUCCESS) |
| 735 | hdd_err("Error in dump driver information, status %d", |
| 736 | qdf_status); |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame] | 737 | hdd_debug("driver_dump_size: %d", |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 738 | hdd_ctx->driver_dump_size); |
| 739 | } |
| 740 | |
| 741 | if (count > hdd_ctx->driver_dump_size - *pos) |
| 742 | no_of_bytes_read = hdd_ctx->driver_dump_size - *pos; |
| 743 | else |
| 744 | no_of_bytes_read = count; |
| 745 | |
| 746 | if (copy_to_user(buf, hdd_ctx->driver_dump_mem + *pos, |
| 747 | no_of_bytes_read)) { |
| 748 | hdd_err("copy to user space failed"); |
SaidiReddy Yenuga | c3a74ba | 2017-03-08 16:17:55 +0530 | [diff] [blame] | 749 | mutex_unlock(&hdd_ctx->memdump_lock); |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 750 | return -EFAULT; |
| 751 | } |
| 752 | |
| 753 | /* offset(pos) should be updated here based on the copy done */ |
| 754 | *pos += no_of_bytes_read; |
| 755 | |
| 756 | /* Entire driver memory dump copy completed */ |
| 757 | if (*pos >= hdd_ctx->driver_dump_size) |
| 758 | hdd_driver_mem_cleanup(); |
| 759 | |
SaidiReddy Yenuga | c3a74ba | 2017-03-08 16:17:55 +0530 | [diff] [blame] | 760 | mutex_unlock(&hdd_ctx->memdump_lock); |
| 761 | |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 762 | return no_of_bytes_read; |
| 763 | } |
| 764 | |
| 765 | |
| 766 | /** |
| 767 | * struct driver_dump_fops - file operations for driver dump feature |
| 768 | * @read - read function for driver dump operation. |
| 769 | * |
| 770 | * This structure initialize the file operation handle for memory |
| 771 | * dump feature |
| 772 | */ |
| 773 | static const struct file_operations driver_dump_fops = { |
| 774 | read: hdd_driver_memdump_read |
| 775 | }; |
| 776 | |
| 777 | /** |
| 778 | * hdd_driver_memdump_procfs_init() - Initialize procfs for driver memory dump |
| 779 | * |
| 780 | * This function create file under proc file system to be used later for |
| 781 | * processing driver memory dump |
| 782 | * |
| 783 | * Return: 0 on success, error code otherwise. |
| 784 | */ |
| 785 | static int hdd_driver_memdump_procfs_init(void) |
| 786 | { |
Jeff Johnson | 6654917 | 2017-08-28 11:53:14 -0700 | [diff] [blame^] | 787 | struct hdd_context *hdd_ctx; |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 788 | |
| 789 | hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD); |
| 790 | if (!hdd_ctx) { |
| 791 | hdd_err("Invalid HDD context"); |
| 792 | return -EINVAL; |
| 793 | } |
| 794 | |
| 795 | proc_dir_driver = proc_mkdir(PROCFS_DRIVER_DUMP_DIR, NULL); |
| 796 | if (proc_dir_driver == NULL) { |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame] | 797 | pr_debug("Could not initialize /proc/%s\n", |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 798 | PROCFS_DRIVER_DUMP_DIR); |
| 799 | return -ENOMEM; |
| 800 | } |
| 801 | |
| 802 | proc_file_driver = proc_create_data(PROCFS_DRIVER_DUMP_NAME, |
| 803 | PROCFS_DRIVER_DUMP_PERM, proc_dir_driver, |
| 804 | &driver_dump_fops, hdd_ctx); |
| 805 | if (proc_file_driver == NULL) { |
| 806 | remove_proc_entry(PROCFS_DRIVER_DUMP_NAME, proc_dir_driver); |
Srinivas Girigowda | 87150ac | 2017-03-06 17:48:02 -0800 | [diff] [blame] | 807 | pr_debug("Could not initialize /proc/%s\n", |
Padma, Santhosh Kumar | 9aba02f | 2016-08-11 16:30:25 +0530 | [diff] [blame] | 808 | PROCFS_DRIVER_DUMP_NAME); |
| 809 | return -ENOMEM; |
| 810 | } |
| 811 | |
| 812 | pr_debug("/proc/%s/%s created\n", PROCFS_DRIVER_DUMP_DIR, |
| 813 | PROCFS_DRIVER_DUMP_NAME); |
| 814 | return 0; |
| 815 | } |
| 816 | |
| 817 | /** |
| 818 | * hdd_driver_memdump_procfs_remove() - Remove file/dir under procfs |
| 819 | * for driver memory dump |
| 820 | * |
| 821 | * This function removes file/dir under proc file system that was |
| 822 | * processing driver memory dump |
| 823 | * |
| 824 | * Return: None |
| 825 | */ |
| 826 | static void hdd_driver_memdump_procfs_remove(void) |
| 827 | { |
| 828 | remove_proc_entry(PROCFS_DRIVER_DUMP_NAME, proc_dir_driver); |
| 829 | pr_debug("/proc/%s/%s removed\n", PROCFS_DRIVER_DUMP_DIR, |
| 830 | PROCFS_DRIVER_DUMP_NAME); |
| 831 | remove_proc_entry(PROCFS_DRIVER_DUMP_DIR, NULL); |
| 832 | pr_debug("/proc/%s removed\n", PROCFS_DRIVER_DUMP_DIR); |
| 833 | } |
| 834 | |
| 835 | /** |
| 836 | * hdd_driver_memdump_init() - Intialization function for driver |
| 837 | * memory dump feature |
| 838 | * |
| 839 | * This function creates proc file for driver memdump feature |
| 840 | * |
| 841 | * Return - 0 on success, error otherwise |
| 842 | */ |
| 843 | int hdd_driver_memdump_init(void) |
| 844 | { |
| 845 | int status; |
| 846 | |
| 847 | if (hdd_get_conparam() == QDF_GLOBAL_FTM_MODE) { |
| 848 | hdd_err("Not initializing memdump in FTM mode"); |
| 849 | return -EINVAL; |
| 850 | } |
| 851 | |
| 852 | status = hdd_driver_memdump_procfs_init(); |
| 853 | if (status) { |
| 854 | hdd_err("Failed to create proc file"); |
| 855 | return status; |
| 856 | } |
| 857 | |
| 858 | return 0; |
| 859 | } |
| 860 | |
| 861 | /** |
| 862 | * hdd_driver_memdump_deinit() - De initialize driver memdump feature |
| 863 | * |
| 864 | * This function removes proc file created for driver memdump feature. |
| 865 | * |
| 866 | * Return: None |
| 867 | */ |
| 868 | void hdd_driver_memdump_deinit(void) |
| 869 | { |
| 870 | if (hdd_get_conparam() == QDF_GLOBAL_FTM_MODE) { |
| 871 | hdd_err("Not deinitializing memdump in FTM mode"); |
| 872 | return; |
| 873 | } |
| 874 | |
| 875 | hdd_driver_memdump_procfs_remove(); |
| 876 | |
| 877 | hdd_driver_mem_cleanup(); |
| 878 | } |