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_QCA8074) || 87 (tgt_info->target_type == TARGET_TYPE_QCA8074V2) || 88 (tgt_info->target_type == TARGET_TYPE_QCA6018)))) { 89 memtype = ((uint32_t)(*pos) & 0xff000000) >> 24; 90 offset = (uint32_t)(*pos) & 0xffffff; 91 HIF_DBG("%s: offset 0x%x memtype 0x%x, datalen %zu\n", 92 __func__, offset, memtype, count); 93 rv = pld_athdiag_read(scn->qdf_dev->dev, 94 offset, memtype, count, 95 (uint8_t *)read_buffer); 96 goto out; 97 } 98 99 if ((count == 4) && ((((uint32_t) (*pos)) & 3) == 0)) { 100 /* reading a word? */ 101 rv = hif_diag_read_access(hif_hdl, (uint32_t)(*pos), 102 (uint32_t *)read_buffer); 103 } else { 104 rv = hif_diag_read_mem(hif_hdl, (uint32_t)(*pos), 105 (uint8_t *)read_buffer, count); 106 } 107 108 out: 109 if (rv) { 110 qdf_mem_free(read_buffer); 111 return -EIO; 112 } 113 114 if (copy_to_user(buf, read_buffer, count)) { 115 qdf_mem_free(read_buffer); 116 HIF_ERROR("%s: copy_to_user error in /proc/%s", 117 __func__, PROCFS_NAME); 118 return -EFAULT; 119 } 120 qdf_mem_free(read_buffer); 121 return count; 122 } 123 124 static ssize_t ath_procfs_diag_write(struct file *file, 125 const char __user *buf, 126 size_t count, loff_t *pos) 127 { 128 hif_handle_t hif_hdl; 129 int rv; 130 uint8_t *write_buffer = NULL; 131 struct hif_softc *scn; 132 uint32_t offset = 0, memtype = 0; 133 struct hif_target_info *tgt_info; 134 135 hif_hdl = get_hif_hdl_from_file(file); 136 scn = HIF_GET_SOFTC(hif_hdl); 137 138 if (scn->bus_ops.hif_addr_in_boundary(hif_hdl, (uint32_t)(*pos))) 139 return -EINVAL; 140 141 write_buffer = qdf_mem_malloc(count); 142 if (!write_buffer) 143 return -ENOMEM; 144 145 if (copy_from_user(write_buffer, buf, count)) { 146 qdf_mem_free(write_buffer); 147 HIF_ERROR("%s: copy_to_user error in /proc/%s", 148 __func__, PROCFS_NAME); 149 return -EFAULT; 150 } 151 152 HIF_DBG("wr buff 0x%pK buf 0x%pK cnt %zu offset 0x%x value 0x%x", 153 write_buffer, buf, count, 154 (int)*pos, *((uint32_t *) write_buffer)); 155 156 tgt_info = hif_get_target_info_handle(GET_HIF_OPAQUE_HDL(hif_hdl)); 157 if ((scn->bus_type == QDF_BUS_TYPE_SNOC) || 158 ((scn->bus_type == QDF_BUS_TYPE_PCI) && 159 ((tgt_info->target_type == TARGET_TYPE_QCA6290) || 160 (tgt_info->target_type == TARGET_TYPE_QCA6390) || 161 (tgt_info->target_type == TARGET_TYPE_QCA8074) || 162 (tgt_info->target_type == TARGET_TYPE_QCA8074V2) || 163 (tgt_info->target_type == TARGET_TYPE_QCA6018)))) { 164 memtype = ((uint32_t)(*pos) & 0xff000000) >> 24; 165 offset = (uint32_t)(*pos) & 0xffffff; 166 HIF_DBG("%s: offset 0x%x memtype 0x%x, datalen %zu\n", 167 __func__, offset, memtype, count); 168 rv = pld_athdiag_write(scn->qdf_dev->dev, 169 offset, memtype, count, 170 (uint8_t *)write_buffer); 171 goto out; 172 } 173 174 if ((count == 4) && ((((uint32_t) (*pos)) & 3) == 0)) { 175 /* reading a word? */ 176 uint32_t value = *((uint32_t *)write_buffer); 177 178 rv = hif_diag_write_access(hif_hdl, (uint32_t)(*pos), value); 179 } else { 180 rv = hif_diag_write_mem(hif_hdl, (uint32_t)(*pos), 181 (uint8_t *)write_buffer, count); 182 } 183 184 out: 185 186 qdf_mem_free(write_buffer); 187 if (rv == 0) 188 return count; 189 else 190 return -EIO; 191 } 192 193 static const struct file_operations athdiag_fops = { 194 .read = ath_procfs_diag_read, 195 .write = ath_procfs_diag_write, 196 }; 197 198 /* 199 * This function is called when the module is loaded 200 * 201 */ 202 int athdiag_procfs_init(void *scn) 203 { 204 proc_dir = proc_mkdir(PROCFS_DIR, NULL); 205 if (proc_dir == NULL) { 206 remove_proc_entry(PROCFS_DIR, NULL); 207 HIF_ERROR("%s: Error: Could not initialize /proc/%s", 208 __func__, PROCFS_DIR); 209 return -ENOMEM; 210 } 211 212 proc_file = proc_create_data(PROCFS_NAME, 0600, proc_dir, 213 &athdiag_fops, (void *)scn); 214 if (proc_file == NULL) { 215 remove_proc_entry(PROCFS_NAME, proc_dir); 216 HIF_ERROR("%s: Could not initialize /proc/%s", 217 __func__, PROCFS_NAME); 218 return -ENOMEM; 219 } 220 221 HIF_DBG("/proc/%s/%s created", PROCFS_DIR, PROCFS_NAME); 222 return 0; /* everything is ok */ 223 } 224 225 /* 226 * This function is called when the module is unloaded 227 * 228 */ 229 void athdiag_procfs_remove(void) 230 { 231 if (proc_dir != NULL) { 232 remove_proc_entry(PROCFS_NAME, proc_dir); 233 HIF_DBG("/proc/%s/%s removed", PROCFS_DIR, PROCFS_NAME); 234 remove_proc_entry(PROCFS_DIR, NULL); 235 HIF_DBG("/proc/%s removed", PROCFS_DIR); 236 proc_dir = NULL; 237 } 238 } 239 #else 240 int athdiag_procfs_init(void *scn) 241 { 242 return 0; 243 } 244 void athdiag_procfs_remove(void) {} 245 #endif 246