1 /* 2 * Copyright (c) 2013-2014, 2016-2018 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 (NULL == read_buffer) { 76 HIF_ERROR("%s: cdf_mem_alloc failed", __func__); 77 return -ENOMEM; 78 } 79 80 HIF_DBG("rd buff 0x%pK cnt %zu offset 0x%x buf 0x%pK", 81 read_buffer, count, (int)*pos, buf); 82 83 tgt_info = hif_get_target_info_handle(GET_HIF_OPAQUE_HDL(hif_hdl)); 84 if ((scn->bus_type == QDF_BUS_TYPE_SNOC) || 85 (scn->bus_type == QDF_BUS_TYPE_PCI && 86 ((tgt_info->target_type == TARGET_TYPE_QCA6290) || 87 (tgt_info->target_type == TARGET_TYPE_QCA6390) || 88 (tgt_info->target_type == TARGET_TYPE_QCA8074) || 89 (tgt_info->target_type == TARGET_TYPE_QCA8074V2) || 90 (tgt_info->target_type == TARGET_TYPE_QCA6018)))) { 91 memtype = ((uint32_t)(*pos) & 0xff000000) >> 24; 92 offset = (uint32_t)(*pos) & 0xffffff; 93 HIF_TRACE("%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 (NULL == write_buffer) { 145 HIF_ERROR("%s: cdf_mem_alloc failed", __func__); 146 return -ENOMEM; 147 } 148 if (copy_from_user(write_buffer, buf, count)) { 149 qdf_mem_free(write_buffer); 150 HIF_ERROR("%s: copy_to_user error in /proc/%s", 151 __func__, PROCFS_NAME); 152 return -EFAULT; 153 } 154 155 HIF_DBG("wr buff 0x%pK buf 0x%pK cnt %zu offset 0x%x value 0x%x", 156 write_buffer, buf, count, 157 (int)*pos, *((uint32_t *) write_buffer)); 158 159 tgt_info = hif_get_target_info_handle(GET_HIF_OPAQUE_HDL(hif_hdl)); 160 if ((scn->bus_type == QDF_BUS_TYPE_SNOC) || 161 ((scn->bus_type == QDF_BUS_TYPE_PCI) && 162 ((tgt_info->target_type == TARGET_TYPE_QCA6290) || 163 (tgt_info->target_type == TARGET_TYPE_QCA6390) || 164 (tgt_info->target_type == TARGET_TYPE_QCA8074) || 165 (tgt_info->target_type == TARGET_TYPE_QCA8074V2) || 166 (tgt_info->target_type == TARGET_TYPE_QCA6018)))) { 167 memtype = ((uint32_t)(*pos) & 0xff000000) >> 24; 168 offset = (uint32_t)(*pos) & 0xffffff; 169 HIF_TRACE("%s: offset 0x%x memtype 0x%x, datalen %zu\n", 170 __func__, offset, memtype, count); 171 rv = pld_athdiag_write(scn->qdf_dev->dev, 172 offset, memtype, count, 173 (uint8_t *)write_buffer); 174 goto out; 175 } 176 177 if ((count == 4) && ((((uint32_t) (*pos)) & 3) == 0)) { 178 /* reading a word? */ 179 uint32_t value = *((uint32_t *)write_buffer); 180 181 rv = hif_diag_write_access(hif_hdl, (uint32_t)(*pos), value); 182 } else { 183 rv = hif_diag_write_mem(hif_hdl, (uint32_t)(*pos), 184 (uint8_t *)write_buffer, count); 185 } 186 187 out: 188 189 qdf_mem_free(write_buffer); 190 if (rv == 0) 191 return count; 192 else 193 return -EIO; 194 } 195 196 static const struct file_operations athdiag_fops = { 197 .read = ath_procfs_diag_read, 198 .write = ath_procfs_diag_write, 199 }; 200 201 /* 202 * This function is called when the module is loaded 203 * 204 */ 205 int athdiag_procfs_init(void *scn) 206 { 207 proc_dir = proc_mkdir(PROCFS_DIR, NULL); 208 if (proc_dir == NULL) { 209 remove_proc_entry(PROCFS_DIR, NULL); 210 HIF_ERROR("%s: Error: Could not initialize /proc/%s", 211 __func__, PROCFS_DIR); 212 return -ENOMEM; 213 } 214 215 proc_file = proc_create_data(PROCFS_NAME, 0600, proc_dir, 216 &athdiag_fops, (void *)scn); 217 if (proc_file == NULL) { 218 remove_proc_entry(PROCFS_NAME, proc_dir); 219 HIF_ERROR("%s: Could not initialize /proc/%s", 220 __func__, PROCFS_NAME); 221 return -ENOMEM; 222 } 223 224 HIF_DBG("/proc/%s/%s created", PROCFS_DIR, PROCFS_NAME); 225 return 0; /* everything is ok */ 226 } 227 228 /* 229 * This function is called when the module is unloaded 230 * 231 */ 232 void athdiag_procfs_remove(void) 233 { 234 if (proc_dir != NULL) { 235 remove_proc_entry(PROCFS_NAME, proc_dir); 236 HIF_DBG("/proc/%s/%s removed", PROCFS_DIR, PROCFS_NAME); 237 remove_proc_entry(PROCFS_DIR, NULL); 238 HIF_DBG("/proc/%s removed", PROCFS_DIR); 239 proc_dir = NULL; 240 } 241 } 242 #else 243 int athdiag_procfs_init(void *scn) 244 { 245 return 0; 246 } 247 void athdiag_procfs_remove(void) {} 248 #endif 249