1 /* 2 * Copyright (c) 2013-2014, 2016-2019 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 memtype = ((uint32_t)(*pos) & 0xff000000) >> 24; 92 offset = (uint32_t)(*pos) & 0xffffff; 93 HIF_DBG("%s: offset 0x%x memtype 0x%x, datalen %zu\n", 94 __func__, offset, memtype, count); 95 rv = pld_athdiag_read(scn->qdf_dev->dev, 96 offset, memtype, count, 97 (uint8_t *)read_buffer); 98 goto out; 99 } 100 101 if ((count == 4) && ((((uint32_t) (*pos)) & 3) == 0)) { 102 /* reading a word? */ 103 rv = hif_diag_read_access(hif_hdl, (uint32_t)(*pos), 104 (uint32_t *)read_buffer); 105 } else { 106 rv = hif_diag_read_mem(hif_hdl, (uint32_t)(*pos), 107 (uint8_t *)read_buffer, count); 108 } 109 110 out: 111 if (rv) { 112 qdf_mem_free(read_buffer); 113 return -EIO; 114 } 115 116 if (copy_to_user(buf, read_buffer, count)) { 117 qdf_mem_free(read_buffer); 118 HIF_ERROR("%s: copy_to_user error in /proc/%s", 119 __func__, PROCFS_NAME); 120 return -EFAULT; 121 } 122 qdf_mem_free(read_buffer); 123 return count; 124 } 125 126 static ssize_t ath_procfs_diag_write(struct file *file, 127 const char __user *buf, 128 size_t count, loff_t *pos) 129 { 130 hif_handle_t hif_hdl; 131 int rv; 132 uint8_t *write_buffer = NULL; 133 struct hif_softc *scn; 134 uint32_t offset = 0, memtype = 0; 135 struct hif_target_info *tgt_info; 136 137 hif_hdl = get_hif_hdl_from_file(file); 138 scn = HIF_GET_SOFTC(hif_hdl); 139 140 if (scn->bus_ops.hif_addr_in_boundary(hif_hdl, (uint32_t)(*pos))) 141 return -EINVAL; 142 143 write_buffer = qdf_mem_malloc(count); 144 if (!write_buffer) 145 return -ENOMEM; 146 147 if (copy_from_user(write_buffer, buf, count)) { 148 qdf_mem_free(write_buffer); 149 HIF_ERROR("%s: copy_to_user error in /proc/%s", 150 __func__, PROCFS_NAME); 151 return -EFAULT; 152 } 153 154 HIF_DBG("wr buff 0x%pK buf 0x%pK cnt %zu offset 0x%x value 0x%x", 155 write_buffer, buf, count, 156 (int)*pos, *((uint32_t *) write_buffer)); 157 158 tgt_info = hif_get_target_info_handle(GET_HIF_OPAQUE_HDL(hif_hdl)); 159 if ((scn->bus_type == QDF_BUS_TYPE_SNOC) || 160 ((scn->bus_type == QDF_BUS_TYPE_PCI) && 161 ((tgt_info->target_type == TARGET_TYPE_QCA6290) || 162 (tgt_info->target_type == TARGET_TYPE_QCA6390) || 163 (tgt_info->target_type == TARGET_TYPE_QCA6490) || 164 (tgt_info->target_type == TARGET_TYPE_QCA8074) || 165 (tgt_info->target_type == TARGET_TYPE_QCA8074V2) || 166 (tgt_info->target_type == TARGET_TYPE_QCN9000) || 167 (tgt_info->target_type == TARGET_TYPE_QCA6018)))) { 168 memtype = ((uint32_t)(*pos) & 0xff000000) >> 24; 169 offset = (uint32_t)(*pos) & 0xffffff; 170 HIF_DBG("%s: offset 0x%x memtype 0x%x, datalen %zu\n", 171 __func__, offset, memtype, count); 172 rv = pld_athdiag_write(scn->qdf_dev->dev, 173 offset, memtype, count, 174 (uint8_t *)write_buffer); 175 goto out; 176 } 177 178 if ((count == 4) && ((((uint32_t) (*pos)) & 3) == 0)) { 179 /* reading a word? */ 180 uint32_t value = *((uint32_t *)write_buffer); 181 182 rv = hif_diag_write_access(hif_hdl, (uint32_t)(*pos), value); 183 } else { 184 rv = hif_diag_write_mem(hif_hdl, (uint32_t)(*pos), 185 (uint8_t *)write_buffer, count); 186 } 187 188 out: 189 190 qdf_mem_free(write_buffer); 191 if (rv == 0) 192 return count; 193 else 194 return -EIO; 195 } 196 197 static const struct file_operations athdiag_fops = { 198 .read = ath_procfs_diag_read, 199 .write = ath_procfs_diag_write, 200 }; 201 202 /* 203 * This function is called when the module is loaded 204 * 205 */ 206 int athdiag_procfs_init(void *scn) 207 { 208 proc_dir = proc_mkdir(PROCFS_DIR, NULL); 209 if (!proc_dir) { 210 remove_proc_entry(PROCFS_DIR, NULL); 211 HIF_ERROR("%s: Error: Could not initialize /proc/%s", 212 __func__, PROCFS_DIR); 213 return -ENOMEM; 214 } 215 216 proc_file = proc_create_data(PROCFS_NAME, 0600, proc_dir, 217 &athdiag_fops, (void *)scn); 218 if (!proc_file) { 219 remove_proc_entry(PROCFS_NAME, proc_dir); 220 HIF_ERROR("%s: Could not initialize /proc/%s", 221 __func__, PROCFS_NAME); 222 return -ENOMEM; 223 } 224 225 HIF_DBG("/proc/%s/%s created", PROCFS_DIR, PROCFS_NAME); 226 return 0; /* everything is ok */ 227 } 228 229 /* 230 * This function is called when the module is unloaded 231 * 232 */ 233 void athdiag_procfs_remove(void) 234 { 235 if (proc_dir) { 236 remove_proc_entry(PROCFS_NAME, proc_dir); 237 HIF_DBG("/proc/%s/%s removed", PROCFS_DIR, PROCFS_NAME); 238 remove_proc_entry(PROCFS_DIR, NULL); 239 HIF_DBG("/proc/%s removed", PROCFS_DIR); 240 proc_dir = NULL; 241 } 242 } 243 #else 244 int athdiag_procfs_init(void *scn) 245 { 246 return 0; 247 } 248 void athdiag_procfs_remove(void) {} 249 #endif 250