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