1 /* 2 * Copyright (c) 2013-2014, 2016-2020 The Linux Foundation. All rights reserved. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for 5 * any purpose with or without fee is hereby granted, provided that the 6 * above copyright notice and this permission notice appear in all 7 * copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL 10 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED 11 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE 12 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 13 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 14 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 15 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 16 * PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #if defined(CONFIG_ATH_PROCFS_DIAG_SUPPORT) 20 #include <linux/module.h> /* Specifically, a module */ 21 #include <linux/kernel.h> /* We're doing kernel work */ 22 #include <linux/version.h> /* We're doing kernel work */ 23 #include <linux/proc_fs.h> /* Necessary because we use the proc fs */ 24 #include <linux/uaccess.h> /* for copy_from_user */ 25 #include "hif.h" 26 #include "hif_main.h" 27 #if defined(HIF_USB) 28 #include "if_usb.h" 29 #endif 30 #if defined(HIF_SDIO) 31 #include "if_sdio.h" 32 #endif 33 #include "hif_debug.h" 34 #include "pld_common.h" 35 #include "target_type.h" 36 37 #define PROCFS_NAME "athdiagpfs" 38 #ifdef MULTI_IF_NAME 39 #define PROCFS_DIR "cld" MULTI_IF_NAME 40 #else 41 #define PROCFS_DIR "cld" 42 #endif 43 44 /** 45 * This structure hold information about the /proc file 46 * 47 */ 48 static struct proc_dir_entry *proc_file, *proc_dir; 49 50 static void *get_hif_hdl_from_file(struct file *file) 51 { 52 struct hif_opaque_softc *scn; 53 54 scn = (struct hif_opaque_softc *)PDE_DATA(file_inode(file)); 55 return (void *)scn; 56 } 57 58 static ssize_t ath_procfs_diag_read(struct file *file, char __user *buf, 59 size_t count, loff_t *pos) 60 { 61 hif_handle_t hif_hdl; 62 int rv; 63 uint8_t *read_buffer = NULL; 64 struct hif_softc *scn; 65 uint32_t offset = 0, memtype = 0; 66 struct hif_target_info *tgt_info; 67 68 hif_hdl = get_hif_hdl_from_file(file); 69 scn = HIF_GET_SOFTC(hif_hdl); 70 71 if (scn->bus_ops.hif_addr_in_boundary(hif_hdl, (uint32_t)(*pos))) 72 return -EINVAL; 73 74 read_buffer = qdf_mem_malloc(count); 75 if (!read_buffer) 76 return -ENOMEM; 77 78 HIF_DBG("rd buff 0x%pK cnt %zu offset 0x%x buf 0x%pK", 79 read_buffer, count, (int)*pos, buf); 80 81 tgt_info = hif_get_target_info_handle(GET_HIF_OPAQUE_HDL(hif_hdl)); 82 if ((scn->bus_type == QDF_BUS_TYPE_SNOC) || 83 (scn->bus_type == QDF_BUS_TYPE_PCI && 84 ((tgt_info->target_type == TARGET_TYPE_QCA6290) || 85 (tgt_info->target_type == TARGET_TYPE_QCA6390) || 86 (tgt_info->target_type == TARGET_TYPE_QCA6490) || 87 (tgt_info->target_type == TARGET_TYPE_QCA8074) || 88 (tgt_info->target_type == TARGET_TYPE_QCA8074V2) || 89 (tgt_info->target_type == TARGET_TYPE_QCN9000) || 90 (tgt_info->target_type == TARGET_TYPE_QCA6018))) || 91 (scn->bus_type == QDF_BUS_TYPE_IPCI && 92 (tgt_info->target_type == TARGET_TYPE_QCA6750))) { 93 memtype = ((uint32_t)(*pos) & 0xff000000) >> 24; 94 offset = (uint32_t)(*pos) & 0xffffff; 95 HIF_DBG("%s: offset 0x%x memtype 0x%x, datalen %zu\n", 96 __func__, offset, memtype, count); 97 rv = pld_athdiag_read(scn->qdf_dev->dev, 98 offset, memtype, count, 99 (uint8_t *)read_buffer); 100 goto out; 101 } 102 103 if ((count == 4) && ((((uint32_t) (*pos)) & 3) == 0)) { 104 /* reading a word? */ 105 rv = hif_diag_read_access(hif_hdl, (uint32_t)(*pos), 106 (uint32_t *)read_buffer); 107 } else { 108 rv = hif_diag_read_mem(hif_hdl, (uint32_t)(*pos), 109 (uint8_t *)read_buffer, count); 110 } 111 112 out: 113 if (rv) { 114 qdf_mem_free(read_buffer); 115 return -EIO; 116 } 117 118 if (copy_to_user(buf, read_buffer, count)) { 119 qdf_mem_free(read_buffer); 120 HIF_ERROR("%s: copy_to_user error in /proc/%s", 121 __func__, PROCFS_NAME); 122 return -EFAULT; 123 } 124 qdf_mem_free(read_buffer); 125 return count; 126 } 127 128 static ssize_t ath_procfs_diag_write(struct file *file, 129 const char __user *buf, 130 size_t count, loff_t *pos) 131 { 132 hif_handle_t hif_hdl; 133 int rv; 134 uint8_t *write_buffer = NULL; 135 struct hif_softc *scn; 136 uint32_t offset = 0, memtype = 0; 137 struct hif_target_info *tgt_info; 138 139 hif_hdl = get_hif_hdl_from_file(file); 140 scn = HIF_GET_SOFTC(hif_hdl); 141 142 if (scn->bus_ops.hif_addr_in_boundary(hif_hdl, (uint32_t)(*pos))) 143 return -EINVAL; 144 145 write_buffer = qdf_mem_malloc(count); 146 if (!write_buffer) 147 return -ENOMEM; 148 149 if (copy_from_user(write_buffer, buf, count)) { 150 qdf_mem_free(write_buffer); 151 HIF_ERROR("%s: copy_to_user error in /proc/%s", 152 __func__, PROCFS_NAME); 153 return -EFAULT; 154 } 155 156 HIF_DBG("wr buff 0x%pK buf 0x%pK cnt %zu offset 0x%x value 0x%x", 157 write_buffer, buf, count, 158 (int)*pos, *((uint32_t *) write_buffer)); 159 160 tgt_info = hif_get_target_info_handle(GET_HIF_OPAQUE_HDL(hif_hdl)); 161 if ((scn->bus_type == QDF_BUS_TYPE_SNOC) || 162 ((scn->bus_type == QDF_BUS_TYPE_PCI) && 163 ((tgt_info->target_type == TARGET_TYPE_QCA6290) || 164 (tgt_info->target_type == TARGET_TYPE_QCA6390) || 165 (tgt_info->target_type == TARGET_TYPE_QCA6490) || 166 (tgt_info->target_type == TARGET_TYPE_QCA8074) || 167 (tgt_info->target_type == TARGET_TYPE_QCA8074V2) || 168 (tgt_info->target_type == TARGET_TYPE_QCN9000) || 169 (tgt_info->target_type == TARGET_TYPE_QCA6018))) || 170 (scn->bus_type == QDF_BUS_TYPE_IPCI && 171 (tgt_info->target_type == TARGET_TYPE_QCA6750))) { 172 memtype = ((uint32_t)(*pos) & 0xff000000) >> 24; 173 offset = (uint32_t)(*pos) & 0xffffff; 174 HIF_DBG("%s: offset 0x%x memtype 0x%x, datalen %zu\n", 175 __func__, offset, memtype, count); 176 rv = pld_athdiag_write(scn->qdf_dev->dev, 177 offset, memtype, count, 178 (uint8_t *)write_buffer); 179 goto out; 180 } 181 182 if ((count == 4) && ((((uint32_t) (*pos)) & 3) == 0)) { 183 /* reading a word? */ 184 uint32_t value = *((uint32_t *)write_buffer); 185 186 rv = hif_diag_write_access(hif_hdl, (uint32_t)(*pos), value); 187 } else { 188 rv = hif_diag_write_mem(hif_hdl, (uint32_t)(*pos), 189 (uint8_t *)write_buffer, count); 190 } 191 192 out: 193 194 qdf_mem_free(write_buffer); 195 if (rv == 0) 196 return count; 197 else 198 return -EIO; 199 } 200 201 static const struct file_operations athdiag_fops = { 202 .read = ath_procfs_diag_read, 203 .write = ath_procfs_diag_write, 204 }; 205 206 /* 207 * This function is called when the module is loaded 208 * 209 */ 210 int athdiag_procfs_init(void *scn) 211 { 212 proc_dir = proc_mkdir(PROCFS_DIR, NULL); 213 if (!proc_dir) { 214 remove_proc_entry(PROCFS_DIR, NULL); 215 HIF_ERROR("%s: Error: Could not initialize /proc/%s", 216 __func__, PROCFS_DIR); 217 return -ENOMEM; 218 } 219 220 proc_file = proc_create_data(PROCFS_NAME, 0600, proc_dir, 221 &athdiag_fops, (void *)scn); 222 if (!proc_file) { 223 remove_proc_entry(PROCFS_NAME, proc_dir); 224 HIF_ERROR("%s: Could not initialize /proc/%s", 225 __func__, PROCFS_NAME); 226 return -ENOMEM; 227 } 228 229 HIF_DBG("/proc/%s/%s created", PROCFS_DIR, PROCFS_NAME); 230 return 0; /* everything is ok */ 231 } 232 233 /* 234 * This function is called when the module is unloaded 235 * 236 */ 237 void athdiag_procfs_remove(void) 238 { 239 if (proc_dir) { 240 remove_proc_entry(PROCFS_NAME, proc_dir); 241 HIF_DBG("/proc/%s/%s removed", PROCFS_DIR, PROCFS_NAME); 242 remove_proc_entry(PROCFS_DIR, NULL); 243 HIF_DBG("/proc/%s removed", PROCFS_DIR); 244 proc_dir = NULL; 245 } 246 } 247 #else 248 int athdiag_procfs_init(void *scn) 249 { 250 return 0; 251 } 252 void athdiag_procfs_remove(void) {} 253 #endif 254