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