From 91d57de5adfc40184ef7cb8974104459c5211add Mon Sep 17 00:00:00 2001 From: Vasanthakumar Thiagarajan Date: Fri, 2 Sep 2011 10:40:06 +0300 Subject: [PATCH] ath6kl: Add debugfs interface to dump diagnostic registers from firmware To dump a particular register: echo > /ieee80211/phyX/ath6kl/reg_addr To dump the entire register set: echo 0 > /ieee80211/phyX/ath6kl/reg_addr Register values will be available at: cat /ieee80211/phyX/ath6kl/reg_dump kvalo: commit log cleanup, renamed few functions, removed a warning message Signed-off-by: Vasanthakumar Thiagarajan Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath6kl/core.h | 1 + drivers/net/wireless/ath/ath6kl/debug.c | 192 ++++++++++++++++++++++++ 2 files changed, 193 insertions(+) diff --git a/drivers/net/wireless/ath/ath6kl/core.h b/drivers/net/wireless/ath/ath6kl/core.h index 65d0d84b476..de5308727b6 100644 --- a/drivers/net/wireless/ath/ath6kl/core.h +++ b/drivers/net/wireless/ath/ath6kl/core.h @@ -476,6 +476,7 @@ struct ath6kl { spinlock_t fwlog_lock; void *fwlog_tmp; u32 fwlog_mask; + unsigned int dbgfs_diag_reg; } debug; #endif /* CONFIG_ATH6KL_DEBUG */ }; diff --git a/drivers/net/wireless/ath/ath6kl/debug.c b/drivers/net/wireless/ath/ath6kl/debug.c index 87de44d0ee3..cb89776f948 100644 --- a/drivers/net/wireless/ath/ath6kl/debug.c +++ b/drivers/net/wireless/ath/ath6kl/debug.c @@ -54,6 +54,27 @@ int ath6kl_printk(const char *level, const char *fmt, ...) } #ifdef CONFIG_ATH6KL_DEBUG + +#define REG_OUTPUT_LEN_PER_LINE 25 +#define REGTYPE_STR_LEN 100 + +struct ath6kl_diag_reg_info { + u32 reg_start; + u32 reg_end; + const char *reg_info; +}; + +static const struct ath6kl_diag_reg_info diag_reg[] = { + { 0x20000, 0x200fc, "General DMA and Rx registers" }, + { 0x28000, 0x28900, "MAC PCU register & keycache" }, + { 0x20800, 0x20a40, "QCU" }, + { 0x21000, 0x212f0, "DCU" }, + { 0x4000, 0x42e4, "RTC" }, + { 0x540000, 0x540000 + (256 * 1024), "RAM" }, + { 0x29800, 0x2B210, "Base Band" }, + { 0x1C000, 0x1C748, "Analog" }, +}; + void ath6kl_dump_registers(struct ath6kl_device *dev, struct ath6kl_irq_proc_registers *irq_proc_reg, struct ath6kl_irq_enable_reg *irq_enable_reg) @@ -528,6 +549,171 @@ static const struct file_operations fops_credit_dist_stats = { .llseek = default_llseek, }; +static unsigned long ath6kl_get_num_reg(void) +{ + int i; + unsigned long n_reg = 0; + + for (i = 0; i < ARRAY_SIZE(diag_reg); i++) + n_reg = n_reg + + (diag_reg[i].reg_end - diag_reg[i].reg_start) / 4 + 1; + + return n_reg; +} + +static bool ath6kl_dbg_is_diag_reg_valid(u32 reg_addr) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(diag_reg); i++) { + if (reg_addr >= diag_reg[i].reg_start && + reg_addr <= diag_reg[i].reg_end) + return true; + } + + return false; +} + +static ssize_t ath6kl_regread_read(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct ath6kl *ar = file->private_data; + u8 buf[50]; + unsigned int len = 0; + + if (ar->debug.dbgfs_diag_reg) + len += scnprintf(buf + len, sizeof(buf) - len, "0x%x\n", + ar->debug.dbgfs_diag_reg); + else + len += scnprintf(buf + len, sizeof(buf) - len, + "All diag registers\n"); + + return simple_read_from_buffer(user_buf, count, ppos, buf, len); +} + +static ssize_t ath6kl_regread_write(struct file *file, + const char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct ath6kl *ar = file->private_data; + u8 buf[50]; + unsigned int len; + unsigned long reg_addr; + + len = min(count, sizeof(buf) - 1); + if (copy_from_user(buf, user_buf, len)) + return -EFAULT; + + buf[len] = '\0'; + + if (strict_strtoul(buf, 0, ®_addr)) + return -EINVAL; + + if ((reg_addr % 4) != 0) + return -EINVAL; + + if (reg_addr && !ath6kl_dbg_is_diag_reg_valid(reg_addr)) + return -EINVAL; + + ar->debug.dbgfs_diag_reg = reg_addr; + + return count; +} + +static const struct file_operations fops_diag_reg_read = { + .read = ath6kl_regread_read, + .write = ath6kl_regread_write, + .open = ath6kl_debugfs_open, + .owner = THIS_MODULE, + .llseek = default_llseek, +}; + +static int ath6kl_regdump_open(struct inode *inode, struct file *file) +{ + struct ath6kl *ar = inode->i_private; + u8 *buf; + unsigned long int reg_len; + unsigned int len = 0, n_reg; + u32 addr; + __le32 reg_val; + int i, status; + + /* Dump all the registers if no register is specified */ + if (!ar->debug.dbgfs_diag_reg) + n_reg = ath6kl_get_num_reg(); + else + n_reg = 1; + + reg_len = n_reg * REG_OUTPUT_LEN_PER_LINE; + if (n_reg > 1) + reg_len += REGTYPE_STR_LEN; + + buf = vmalloc(reg_len); + if (!buf) + return -ENOMEM; + + if (n_reg == 1) { + addr = ar->debug.dbgfs_diag_reg; + + status = ath6kl_diag_read32(ar, + TARG_VTOP(ar->target_type, addr), + (u32 *)®_val); + if (status) + goto fail_reg_read; + + len += scnprintf(buf + len, reg_len - len, + "0x%06x 0x%08x\n", addr, le32_to_cpu(reg_val)); + goto done; + } + + for (i = 0; i < ARRAY_SIZE(diag_reg); i++) { + len += scnprintf(buf + len, reg_len - len, + "%s\n", diag_reg[i].reg_info); + for (addr = diag_reg[i].reg_start; + addr <= diag_reg[i].reg_end; addr += 4) { + status = ath6kl_diag_read32(ar, + TARG_VTOP(ar->target_type, addr), + (u32 *)®_val); + if (status) + goto fail_reg_read; + + len += scnprintf(buf + len, reg_len - len, + "0x%06x 0x%08x\n", + addr, le32_to_cpu(reg_val)); + } + } + +done: + file->private_data = buf; + return 0; + +fail_reg_read: + ath6kl_warn("Unable to read memory:%u\n", addr); + vfree(buf); + return -EIO; +} + +static ssize_t ath6kl_regdump_read(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) +{ + u8 *buf = file->private_data; + return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); +} + +static int ath6kl_regdump_release(struct inode *inode, struct file *file) +{ + vfree(file->private_data); + return 0; +} + +static const struct file_operations fops_reg_dump = { + .open = ath6kl_regdump_open, + .read = ath6kl_regdump_read, + .release = ath6kl_regdump_release, + .owner = THIS_MODULE, + .llseek = default_llseek, +}; + int ath6kl_debug_init(struct ath6kl *ar) { ar->debug.fwlog_buf.buf = vmalloc(ATH6KL_FWLOG_SIZE); @@ -568,6 +754,12 @@ int ath6kl_debug_init(struct ath6kl *ar) debugfs_create_file("fwlog_mask", S_IRUSR | S_IWUSR, ar->debugfs_phy, ar, &fops_fwlog_mask); + debugfs_create_file("reg_addr", S_IRUSR | S_IWUSR, ar->debugfs_phy, ar, + &fops_diag_reg_read); + + debugfs_create_file("reg_dump", S_IRUSR, ar->debugfs_phy, ar, + &fops_reg_dump); + return 0; } -- 2.41.0