#include <linux/dcache.h> #include <linux/debugfs.h> #include <linux/delay.h> #include <linux/mm.h> #include <linux/string.h> #include <linux/slab.h> #include "decl.h" #include "cmd.h" #include "debugfs.h" static struct dentry *lbs_dir; static char *szStates[] = { "Connected", "Disconnected" }; #ifdef PROC_DEBUG static void lbs_debug_init(struct lbs_private *priv); #endif static int open_file_generic(struct inode *inode, struct file *file) { file->private_data = inode->i_private; return 0; } static ssize_t write_file_dummy(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { return -EINVAL; } static const size_t len = PAGE_SIZE; static ssize_t lbs_dev_info(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { struct lbs_private *priv = file->private_data; size_t pos = 0; unsigned long addr = get_zeroed_page(GFP_KERNEL); char *buf = (char *)addr; ssize_t res; if (!buf) return -ENOMEM; pos += snprintf(buf+pos, len-pos, "state = %s\n", szStates[priv->connect_status]); pos += snprintf(buf+pos, len-pos, "region_code = %02x\n", (u32) priv->regioncode); res = simple_read_from_buffer(userbuf, count, ppos, buf, pos); free_page(addr); return res; } static ssize_t lbs_sleepparams_write(struct file *file, const char __user *user_buf, size_t count, loff_t *ppos) { struct lbs_private *priv = file->private_data; ssize_t buf_size, ret; struct sleep_params sp; int p1, p2, p3, p4, p5, p6; unsigned long addr = get_zeroed_page(GFP_KERNEL); char *buf = (char *)addr; if (!buf) return -ENOMEM; buf_size = min(count, len - 1); if (copy_from_user(buf, user_buf, buf_size)) { ret = -EFAULT; goto out_unlock; } ret = sscanf(buf, "%d %d %d %d %d %d", &p1, &p2, &p3, &p4, &p5, &p6); if (ret != 6) { ret = -EINVAL; goto out_unlock; } sp.sp_error = p1; sp.sp_offset = p2; sp.sp_stabletime = p3; sp.sp_calcontrol = p4; sp.sp_extsleepclk = p5; sp.sp_reserved = p6; ret = lbs_cmd_802_11_sleep_params(priv, CMD_ACT_SET, &sp); if (!ret) ret = count; else if (ret > 0) ret = -EINVAL; out_unlock: free_page(addr); return ret; } static ssize_t lbs_sleepparams_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { struct lbs_private *priv = file->private_data; ssize_t ret; size_t pos = 0; struct sleep_params sp; unsigned long addr = get_zeroed_page(GFP_KERNEL); char *buf = (char *)addr; if (!buf) return -ENOMEM; ret = lbs_cmd_802_11_sleep_params(priv, CMD_ACT_GET, &sp); if (ret) goto out_unlock; pos += snprintf(buf, len, "%d %d %d %d %d %d\n", sp.sp_error, sp.sp_offset, sp.sp_stabletime, sp.sp_calcontrol, sp.sp_extsleepclk, sp.sp_reserved); ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos); out_unlock: free_page(addr); return ret; } static ssize_t lbs_host_sleep_write(struct file *file, const char __user *user_buf, size_t count, loff_t *ppos) { struct lbs_private *priv = file->private_data; ssize_t buf_size, ret; int host_sleep; unsigned long addr = get_zeroed_page(GFP_KERNEL); char *buf = (char *)addr; if (!buf) return -ENOMEM; buf_size = min(count, len - 1); if (copy_from_user(buf, user_buf, buf_size)) { ret = -EFAULT; goto out_unlock; } ret = sscanf(buf, "%d", &host_sleep); if (ret != 1) { ret = -EINVAL; goto out_unlock; } if (host_sleep == 0) ret = lbs_set_host_sleep(priv, 0); else if (host_sleep == 1) { if (priv->wol_criteria == EHS_REMOVE_WAKEUP) { lbs_pr_info("wake parameters not configured"); ret = -EINVAL; goto out_unlock; } ret = lbs_set_host_sleep(priv, 1); } else { lbs_pr_err("invalid option\n"); ret = -EINVAL; } if (!ret) ret = count; out_unlock: free_page(addr); return ret; } static ssize_t lbs_host_sleep_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { struct lbs_private *priv = file->private_data; ssize_t ret; size_t pos = 0; unsigned long addr = get_zeroed_page(GFP_KERNEL); char *buf = (char *)addr; if (!buf) return -ENOMEM; pos += snprintf(buf, len, "%d\n", priv->is_host_sleep_activated); ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos); free_page(addr); return ret; } /* * When calling CMD_802_11_SUBSCRIBE_EVENT with CMD_ACT_GET, me might * get a bunch of vendor-specific TLVs (a.k.a. IEs) back from the * firmware. Here's an example: * 04 01 02 00 00 00 05 01 02 00 00 00 06 01 02 00 * 00 00 07 01 02 00 3c 00 00 00 00 00 00 00 03 03 * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 * * The 04 01 is the TLV type (here TLV_TYPE_RSSI_LOW), 02 00 is the length, * 00 00 are the data bytes of this TLV. For this TLV, their meaning is * defined in mrvlietypes_thresholds * * This function searches in this TLV data chunk for a given TLV type * and returns a pointer to the first data byte of the TLV, or to NULL * if the TLV hasn't been found. */ static void *lbs_tlv_find(uint16_t tlv_type, const uint8_t *tlv, uint16_t size) { struct mrvl_ie_header *tlv_h; uint16_t length; ssize_t pos = 0; while (pos < size) { tlv_h = (struct mrvl_ie_header *) tlv; if (!tlv_h->len) return NULL; if (tlv_h->type == cpu_to_le16(tlv_type)) return tlv_h; length = le16_to_cpu(tlv_h->len) + sizeof(*tlv_h); pos += length; tlv += length; } return NULL; } static ssize_t lbs_threshold_read(uint16_t tlv_type, uint16_t event_mask, struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { struct cmd_ds_802_11_subscribe_event *subscribed; struct mrvl_ie_thresholds *got; struct lbs_private *priv = file->private_data; ssize_t ret = 0; size_t pos = 0; char *buf; u8 value; u8 freq; int events = 0; buf = (char *)get_zeroed_page(GFP_KERNEL); if (!buf) return -ENOMEM; subscribed = kzalloc(sizeof(*subscribed), GFP_KERNEL); if (!subscribed) { ret = -ENOMEM; goto out_page; } subscribed->hdr.size = cpu_to_le16(sizeof(*subscribed)); subscribed->action = cpu_to_le16(CMD_ACT_GET); ret = lbs_cmd_with_response(priv, CMD_802_11_SUBSCRIBE_EVENT, subscribed); if (ret) goto out_cmd; got = lbs_tlv_find(tlv_type, subscribed->tlv, sizeof(subscribed->tlv)); if (got) { value = got->value; freq = got->freq; events = le16_to_cpu(subscribed->events); pos += snprintf(buf, len, "%d %d %d\n", value, freq, !!(events & event_mask)); } ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos); out_cmd: kfree(subscribed); out_page: free_page((unsigned long)buf); return ret; } static ssize_t lbs_threshold_write(uint16_t tlv_type, uint16_t event_mask, struct file *file, const char __user *userbuf, size_t count, loff_t *ppos) { struct cmd_ds_802_11_subscribe_event *events; struct mrvl_ie_thresholds *tlv; struct lbs_private *priv = file->private_data; ssize_t buf_size; int value, freq, new_mask; uint16_t curr_mask; char *buf; int ret; buf = (char *)get_zeroed_page(GFP_KERNEL); if (!buf) return -ENOMEM; buf_size = min(count, len - 1); if (copy_from_user(buf, userbuf, buf_size)) { ret = -EFAULT; goto out_page; } ret = sscanf(buf, "%d %d %d", &value, &freq, &new_mask); if (ret != 3) { ret = -EINVAL; goto out_page; } events = kzalloc(sizeof(*events), GFP_KERNEL); if (!events) { ret = -ENOMEM; goto out_page; } events->hdr.size = cpu_to_le16(sizeof(*events)); events->action = cpu_to_le16(CMD_ACT_GET); ret = lbs_cmd_with_response(priv, CMD_802_11_SUBSCRIBE_EVENT, events); if (ret) goto out_events; curr_mask = le16_to_cpu(events->events); if (new_mask) new_mask = curr_mask | event_mask; else new_mask = curr_mask & ~event_mask; /* Now everything is set and we can send stuff down to the firmware */ tlv = (void *)events->tlv; events->action = cpu_to_le16(CMD_ACT_SET); events->events = cpu_to_le16(new_mask); tlv->header.type = cpu_to_le16(tlv_type); tlv->header.len = cpu_to_le16(sizeof(*tlv) - sizeof(tlv->header)); tlv->value = value; if (tlv_type != TLV_TYPE_BCNMISS) tlv->freq = freq; /* The command header, the action, the event mask, and one TLV */ events->hdr.size = cpu_to_le16(sizeof(events->hdr) + 4 + sizeof(*tlv)); ret = lbs_cmd_with_response(priv, CMD_802_11_SUBSCRIBE_EVENT, events); if (!ret) ret = count; out_events: kfree(events); out_page: free_page((unsigned long)buf); return ret; } static ssize_t lbs_lowrssi_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { return lbs_threshold_read(TLV_TYPE_RSSI_LOW, CMD_SUBSCRIBE_RSSI_LOW, file, userbuf, count, ppos); } static ssize_t lbs_lowrssi_write(struct file *file, const char __user *userbuf, size_t count, loff_t *ppos) { return lbs_threshold_write(TLV_TYPE_RSSI_LOW, CMD_SUBSCRIBE_RSSI_LOW, file, userbuf, count, ppos); } static ssize_t lbs_lowsnr_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { return lbs_threshold_read(TLV_TYPE_SNR_LOW, CMD_SUBSCRIBE_SNR_LOW, file, userbuf, count, ppos); } static ssize_t lbs_lowsnr_write(struct file *file, const char __user *userbuf, size_t count, loff_t *ppos) { return lbs_threshold_write(TLV_TYPE_SNR_LOW, CMD_SUBSCRIBE_SNR_LOW, file, userbuf, count, ppos); } static ssize_t lbs_failcount_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { return lbs_threshold_read(TLV_TYPE_FAILCOUNT, CMD_SUBSCRIBE_FAILCOUNT, file, userbuf, count, ppos); } static ssize_t lbs_failcount_write(struct file *file, const char __user *userbuf, size_t count, loff_t *ppos) { return lbs_threshold_write(TLV_TYPE_FAILCOUNT, CMD_SUBSCRIBE_FAILCOUNT, file, userbuf, count, ppos); } static ssize_t lbs_highrssi_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { return lbs_threshold_read(TLV_TYPE_RSSI_HIGH, CMD_SUBSCRIBE_RSSI_HIGH, file, userbuf, count, ppos); } static ssize_t lbs_highrssi_write(struct file *file, const char __user *userbuf, size_t count, loff_t *ppos) { return lbs_threshold_write(TLV_TYPE_RSSI_HIGH, CMD_SUBSCRIBE_RSSI_HIGH, file, userbuf, count, ppos); } static ssize_t lbs_highsnr_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { return lbs_threshold_read(TLV_TYPE_SNR_HIGH, CMD_SUBSCRIBE_SNR_HIGH, file, userbuf, count, ppos); } static ssize_t lbs_highsnr_write(struct file *file, const char __user *userbuf, size_t count, loff_t *ppos) { return lbs_threshold_write(TLV_TYPE_SNR_HIGH, CMD_SUBSCRIBE_SNR_HIGH, file, userbuf, count, ppos); } static ssize_t lbs_bcnmiss_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { return lbs_threshold_read(TLV_TYPE_BCNMISS, CMD_SUBSCRIBE_BCNMISS, file, userbuf, count, ppos); } static ssize_t lbs_bcnmiss_write(struct file *file, const char __user *userbuf, size_t count, loff_t *ppos) { return lbs_threshold_write(TLV_TYPE_BCNMISS, CMD_SUBSCRIBE_BCNMISS, file, userbuf, count, ppos); } static ssize_t lbs_rdmac_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { struct lbs_private *priv = file->private_data; ssize_t pos = 0; int ret; unsigned long addr = get_zeroed_page(GFP_KERNEL); char *buf = (char *)addr; u32 val = 0; if (!buf) return -ENOMEM; ret = lbs_get_reg(priv, CMD_MAC_REG_ACCESS, priv->mac_offset, &val); mdelay(10); if (!ret) { pos = snprintf(buf, len, "MAC[0x%x] = 0x%08x\n", priv->mac_offset, val); ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos); } free_page(addr); return ret; } static ssize_t lbs_rdmac_write(struct file *file, const char __user *userbuf, size_t count, loff_t *ppos) { struct lbs_private *priv = file->private_data; ssize_t res, buf_size; unsigned long addr = get_zeroed_page(GFP_KERNEL); char *buf = (char *)addr; if (!buf) return -ENOMEM; buf_size = min(count, len - 1); if (copy_from_user(buf, userbuf, buf_size)) { res = -EFAULT; goto out_unlock; } priv->mac_offset = simple_strtoul((char *)buf, NULL, 16); res = count; out_unlock: free_page(addr); return res; } static ssize_t lbs_wrmac_write(struct file *file, const char __user *userbuf, size_t count, loff_t *ppos) { struct lbs_private *priv = file->private_data; ssize_t res, buf_size; u32 offset, value; unsigned long addr = get_zeroed_page(GFP_KERNEL); char *buf = (char *)addr; if (!buf) return -ENOMEM; buf_size = min(count, len - 1); if (copy_from_user(buf, userbuf, buf_size)) { res = -EFAULT; goto out_unlock; } res = sscanf(buf, "%x %x", &offset, &value); if (res != 2) { res = -EFAULT; goto out_unlock; } res = lbs_set_reg(priv, CMD_MAC_REG_ACCESS, offset, value); mdelay(10); if (!res) res = count; out_unlock: free_page(addr); return res; } static ssize_t lbs_rdbbp_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { struct lbs_private *priv = file->private_data; ssize_t pos = 0; int ret; unsigned long addr = get_zeroed_page(GFP_KERNEL); char *buf = (char *)addr; u32 val; if (!buf) return -ENOMEM; ret = lbs_get_reg(priv, CMD_BBP_REG_ACCESS, priv->bbp_offset, &val); mdelay(10); if (!ret) { pos = snprintf(buf, len, "BBP[0x%x] = 0x%08x\n", priv->bbp_offset, val); ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos); } free_page(addr); return ret; } static ssize_t lbs_rdbbp_write(struct file *file, const char __user *userbuf, size_t count, loff_t *ppos) { struct lbs_private *priv = file->private_data; ssize_t res, buf_size; unsigned long addr = get_zeroed_page(GFP_KERNEL); char *buf = (char *)addr; if (!buf) return -ENOMEM; buf_size = min(count, len - 1); if (copy_from_user(buf, userbuf, buf_size)) { res = -EFAULT; goto out_unlock; } priv->bbp_offset = simple_strtoul((char *)buf, NULL, 16); res = count; out_unlock: free_page(addr); return res; } static ssize_t lbs_wrbbp_write(struct file *file, const char __user *userbuf, size_t count, loff_t *ppos) { struct lbs_private *priv = file->private_data; ssize_t res, buf_size; u32 offset, value; unsigned long addr = get_zeroed_page(GFP_KERNEL); char *buf = (char *)addr; if (!buf) return -ENOMEM; buf_size = min(count, len - 1); if (copy_from_user(buf, userbuf, buf_size)) { res = -EFAULT; goto out_unlock; } res = sscanf(buf, "%x %x", &offset, &value); if (res != 2) { res = -EFAULT; goto out_unlock; } res = lbs_set_reg(priv, CMD_BBP_REG_ACCESS, offset, value); mdelay(10); if (!res) res = count; out_unlock: free_page(addr); return res; } static ssize_t lbs_rdrf_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { struct lbs_private *priv = file->private_data; ssize_t pos = 0; int ret; unsigned long addr = get_zeroed_page(GFP_KERNEL); char *buf = (char *)addr; u32 val; if (!buf) return -ENOMEM; ret = lbs_get_reg(priv, CMD_RF_REG_ACCESS, priv->rf_offset, &val); mdelay(10); if (!ret) { pos = snprintf(buf, len, "RF[0x%x] = 0x%08x\n", priv->rf_offset, val); ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos); } free_page(addr); return ret; } static ssize_t lbs_rdrf_write(struct file *file, const char __user *userbuf, size_t count, loff_t *ppos) { struct lbs_private *priv = file->private_data; ssize_t res, buf_size; unsigned long addr = get_zeroed_page(GFP_KERNEL); char *buf = (char *)addr; if (!buf) return -ENOMEM; buf_size = min(count, len - 1); if (copy_from_user(buf, userbuf, buf_size)) { res = -EFAULT; goto out_unlock; } priv->rf_offset = simple_strtoul(buf, NULL, 16); res = count; out_unlock: free_page(addr); return res; } static ssize_t lbs_wrrf_write(struct file *file, const char __user *userbuf, size_t count, loff_t *ppos) { struct lbs_private *priv = file->private_data; ssize_t res, buf_size; u32 offset, value; unsigned long addr = get_zeroed_page(GFP_KERNEL); char *buf = (char *)addr; if (!buf) return -ENOMEM; buf_size = min(count, len - 1); if (copy_from_user(buf, userbuf, buf_size)) { res = -EFAULT; goto out_unlock; } res = sscanf(buf, "%x %x", &offset, &value); if (res != 2) { res = -EFAULT; goto out_unlock; } res = lbs_set_reg(priv, CMD_RF_REG_ACCESS, offset, value); mdelay(10); if (!res) res = count; out_unlock: free_page(addr); return res; } #define FOPS(fread, fwrite) { \ .owner = THIS_MODULE, \ .open = open_file_generic, \ .read = (fread), \ .write = (fwrite), \ .llseek = generic_file_llseek, \ } struct lbs_debugfs_files { const char *name; int perm; struct file_operations fops; }; static const struct lbs_debugfs_files debugfs_files[] = { { "info", 0444, FOPS(lbs_dev_info, write_file_dummy), }, { "sleepparams", 0644, FOPS(lbs_sleepparams_read, lbs_sleepparams_write), }, { "hostsleep", 0644, FOPS(lbs_host_sleep_read, lbs_host_sleep_write), }, }; static const struct lbs_debugfs_files debugfs_events_files[] = { {"low_rssi", 0644, FOPS(lbs_lowrssi_read, lbs_lowrssi_write), }, {"low_snr", 0644, FOPS(lbs_lowsnr_read, lbs_lowsnr_write), }, {"failure_count", 0644, FOPS(lbs_failcount_read, lbs_failcount_write), }, {"beacon_missed", 0644, FOPS(lbs_bcnmiss_read, lbs_bcnmiss_write), }, {"high_rssi", 0644, FOPS(lbs_highrssi_read, lbs_highrssi_write), }, {"high_snr", 0644, FOPS(lbs_highsnr_read, lbs_highsnr_write), }, }; static const struct lbs_debugfs_files debugfs_regs_files[] = { {"rdmac", 0644, FOPS(lbs_rdmac_read, lbs_rdmac_write), }, {"wrmac", 0600, FOPS(NULL, lbs_wrmac_write), }, {"rdbbp", 0644, FOPS(lbs_rdbbp_read, lbs_rdbbp_write), }, {"wrbbp", 0600, FOPS(NULL, lbs_wrbbp_write), }, {"rdrf", 0644, FOPS(lbs_rdrf_read, lbs_rdrf_write), }, {"wrrf", 0600, FOPS(NULL, lbs_wrrf_write), }, }; void lbs_debugfs_init(void) { if (!lbs_dir) lbs_dir = debugfs_create_dir("lbs_wireless", NULL); } void lbs_debugfs_remove(void) { if (lbs_dir) debugfs_remove(lbs_dir); } void lbs_debugfs_init_one(struct lbs_private *priv, struct net_device *dev) { int i; const struct lbs_debugfs_files *files; if (!lbs_dir) goto exit; priv->debugfs_dir = debugfs_create_dir(dev->name, lbs_dir); if (!priv->debugfs_dir) goto exit; for (i=0; i<ARRAY_SIZE(debugfs_files); i++) { files = &debugfs_files[i]; priv->debugfs_files[i] = debugfs_create_file(files->name, files->perm, priv->debugfs_dir, priv, &files->fops); } priv->events_dir = debugfs_create_dir("subscribed_events", priv->debugfs_dir); if (!priv->events_dir) goto exit; for (i=0; i<ARRAY_SIZE(debugfs_events_files); i++) { files = &debugfs_events_files[i]; priv->debugfs_events_files[i] = debugfs_create_file(files->name, files->perm, priv->events_dir, priv, &files->fops); } priv->regs_dir = debugfs_create_dir("registers", priv->debugfs_dir); if (!priv->regs_dir) goto exit; for (i=0; i<ARRAY_SIZE(debugfs_regs_files); i++) { files = &debugfs_regs_files[i]; priv->debugfs_regs_files[i] = debugfs_create_file(files->name, files->perm, priv->regs_dir, priv, &files->fops); } #ifdef PROC_DEBUG lbs_debug_init(priv); #endif exit: return; } void lbs_debugfs_remove_one(struct lbs_private *priv) { int i; for(i=0; i<ARRAY_SIZE(debugfs_regs_files); i++) debugfs_remove(priv->debugfs_regs_files[i]); debugfs_remove(priv->regs_dir); for(i=0; i<ARRAY_SIZE(debugfs_events_files); i++) debugfs_remove(priv->debugfs_events_files[i]); debugfs_remove(priv->events_dir); #ifdef PROC_DEBUG debugfs_remove(priv->debugfs_debug); #endif for(i=0; i<ARRAY_SIZE(debugfs_files); i++) debugfs_remove(priv->debugfs_files[i]); debugfs_remove(priv->debugfs_dir); } /* debug entry */ #ifdef PROC_DEBUG #define item_size(n) (FIELD_SIZEOF(struct lbs_private, n)) #define item_addr(n) (offsetof(struct lbs_private, n)) struct debug_data { char name[32]; u32 size; size_t addr; }; /* To debug any member of struct lbs_private, simply add one line here. */ static struct debug_data items[] = { {"psmode", item_size(psmode), item_addr(psmode)}, {"psstate", item_size(psstate), item_addr(psstate)}, }; static int num_of_items = ARRAY_SIZE(items); /** * @brief proc read function * * @param page pointer to buffer * @param s read data starting position * @param off offset * @param cnt counter * @param eof end of file flag * @param data data to output * @return number of output data */ static ssize_t lbs_debugfs_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { int val = 0; size_t pos = 0; ssize_t res; char *p; int i; struct debug_data *d; unsigned long addr = get_zeroed_page(GFP_KERNEL); char *buf = (char *)addr; if (!buf) return -ENOMEM; p = buf; d = file->private_data; for (i = 0; i < num_of_items; i++) { if (d[i].size == 1) val = *((u8 *) d[i].addr); else if (d[i].size == 2) val = *((u16 *) d[i].addr); else if (d[i].size == 4) val = *((u32 *) d[i].addr); else if (d[i].size == 8) val = *((u64 *) d[i].addr); pos += sprintf(p + pos, "%s=%d\n", d[i].name, val); } res = simple_read_from_buffer(userbuf, count, ppos, p, pos); free_page(addr); return res; } /** * @brief proc write function * * @param f file pointer * @param buf pointer to data buffer * @param cnt data number to write * @param data data to write * @return number of data */ static ssize_t lbs_debugfs_write(struct file *f, const char __user *buf, size_t cnt, loff_t *ppos) { int r, i; char *pdata; char *p; char *p0; char *p1; char *p2; struct debug_data *d = f->private_data; pdata = kmalloc(cnt, GFP_KERNEL); if (pdata == NULL) return 0; if (copy_from_user(pdata, buf, cnt)) { lbs_deb_debugfs("Copy from user failed\n"); kfree(pdata); return 0; } p0 = pdata; for (i = 0; i < num_of_items; i++) { do { p = strstr(p0, d[i].name); if (p == NULL) break; p1 = strchr(p, '\n'); if (p1 == NULL) break; p0 = p1++; p2 = strchr(p, '='); if (!p2) break; p2++; r = simple_strtoul(p2, NULL, 0); if (d[i].size == 1) *((u8 *) d[i].addr) = (u8) r; else if (d[i].size == 2) *((u16 *) d[i].addr) = (u16) r; else if (d[i].size == 4) *((u32 *) d[i].addr) = (u32) r; else if (d[i].size == 8) *((u64 *) d[i].addr) = (u64) r; break; } while (1); } kfree(pdata); return (ssize_t)cnt; } static const struct file_operations lbs_debug_fops = { .owner = THIS_MODULE, .open = open_file_generic, .write = lbs_debugfs_write, .read = lbs_debugfs_read, .llseek = default_llseek, }; /** * @brief create debug proc file * * @param priv pointer struct lbs_private * @param dev pointer net_device * @return N/A */ static void lbs_debug_init(struct lbs_private *priv) { int i; if (!priv->debugfs_dir) return; for (i = 0; i < num_of_items; i++) items[i].addr += (size_t) priv; priv->debugfs_debug = debugfs_create_file("debug", 0644, priv->debugfs_dir, &items[0], &lbs_debug_fops); } #endif