From: Amitkumar Karwar <akarwar@xxxxxxxxxxx>
Firmware dump feature is added for PCIe based chipsets.
Separate file will be created at /var/log/fw_dump_*
for each memory segment.
Signed-off-by: Amitkumar Karwar <akarwar@xxxxxxxxxxx>
Signed-off-by: Bing Zhao <bzhao@xxxxxxxxxxx>
---
drivers/net/wireless/mwifiex/cmdevt.c | 3 +
drivers/net/wireless/mwifiex/main.c | 2 +
drivers/net/wireless/mwifiex/main.h | 2 +
drivers/net/wireless/mwifiex/pcie.c | 227 ++++++++++++++++++++++++++++++++++
drivers/net/wireless/mwifiex/pcie.h | 27 ++++
5 files changed, 261 insertions(+)
diff --git a/drivers/net/wireless/mwifiex/cmdevt.c b/drivers/net/wireless/mwifiex/cmdevt.c
index 8dee6c8..421322f 100644
--- a/drivers/net/wireless/mwifiex/cmdevt.c
+++ b/drivers/net/wireless/mwifiex/cmdevt.c
@@ -960,6 +960,9 @@ mwifiex_cmd_timeout_func(unsigned long function_context)
if (adapter->hw_status == MWIFIEX_HW_STATUS_INITIALIZING)
mwifiex_init_fw_complete(adapter);
+ if (adapter->if_ops.fw_dump)
+ adapter->if_ops.fw_dump(adapter);
+
if (adapter->if_ops.card_reset)
adapter->if_ops.card_reset(adapter);
}
diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c
index cbabc12..6bc645a 100644
--- a/drivers/net/wireless/mwifiex/main.c
+++ b/drivers/net/wireless/mwifiex/main.c
@@ -881,6 +881,8 @@ mwifiex_add_card(void *card, struct semaphore *sem,
goto err_kmalloc;
INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
+ if (adapter->if_ops.iface_work)
+ INIT_WORK(&adapter->iface_work, adapter->if_ops.iface_work);
/* Register the device. Fill up the private data structure with relevant
information from the card. */
diff --git a/drivers/net/wireless/mwifiex/main.h b/drivers/net/wireless/mwifiex/main.h
index 3418119..d70457b 100644
--- a/drivers/net/wireless/mwifiex/main.h
+++ b/drivers/net/wireless/mwifiex/main.h
@@ -674,6 +674,7 @@ struct mwifiex_if_ops {
void (*card_reset) (struct mwifiex_adapter *);
void (*fw_dump)(struct mwifiex_adapter *);
int (*clean_pcie_ring) (struct mwifiex_adapter *adapter);
+ void (*iface_work)(struct work_struct *work);
};
struct mwifiex_adapter {
@@ -809,6 +810,7 @@ struct mwifiex_adapter {
bool ext_scan;
u8 fw_api_ver;
u8 fw_key_api_major_ver, fw_key_api_minor_ver;
+ struct work_struct iface_work;
};
int mwifiex_init_lock_list(struct mwifiex_adapter *adapter);
diff --git a/drivers/net/wireless/mwifiex/pcie.c b/drivers/net/wireless/mwifiex/pcie.c
index c2cfeec..51989b3 100644
--- a/drivers/net/wireless/mwifiex/pcie.c
+++ b/drivers/net/wireless/mwifiex/pcie.c
@@ -37,6 +37,9 @@ static struct mwifiex_if_ops pcie_ops;
static struct semaphore add_remove_card_sem;
+/* enum mwifiex_pcie_work_flags bitmap */
+static unsigned long pcie_work_flags;
+
static int
mwifiex_map_pci_memory(struct mwifiex_adapter *adapter, struct sk_buff *skb,
size_t size, int flags)
@@ -221,6 +224,8 @@ static void mwifiex_pcie_remove(struct pci_dev *pdev)
if (!adapter || !adapter->priv_num)
return;
+ cancel_work_sync(&adapter->iface_work);
+
if (user_rmmod) {
#ifdef CONFIG_PM_SLEEP
if (adapter->is_suspended)
@@ -307,6 +312,17 @@ static int mwifiex_read_reg(struct mwifiex_adapter *adapter, int reg, u32 *data)
return 0;
}
+/* This function reads u8 data from PCIE card register. */
+static int mwifiex_read_reg_byte(struct mwifiex_adapter *adapter,
+ int reg, u8 *data)
+{
+ struct pcie_service_card *card = adapter->card;
+
+ *data = ioread8(card->pci_mmap1 + reg);
+
+ return 0;
+}
+
/*
* This function adds delay loop to ensure FW is awake before proceeding.
*/
@@ -2172,6 +2188,215 @@ static int mwifiex_pcie_host_to_card(struct mwifiex_adapter *adapter, u8 type,
return 0;
}
+/* This function read/write firmware */
+static enum rdwr_status
+mwifiex_pcie_rdwr_firmware(struct mwifiex_adapter *adapter, u8 doneflag)
+{
+ int ret, tries;
+ u8 ctrl_data;
+
+ ret = mwifiex_write_reg(adapter, DEBUG_DUMP_CTRL_REG, DEBUG_HOST_READY);
+ if (ret) {
+ dev_err(adapter->dev, "PCIE write err\n");
+ return RDWR_STATUS_FAILURE;
+ }
+
+ for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
+ mwifiex_read_reg_byte(adapter, DEBUG_DUMP_CTRL_REG, &ctrl_data);
+ if (ctrl_data == DEBUG_FW_DONE)
+ return RDWR_STATUS_SUCCESS;
+ if (doneflag && ctrl_data == doneflag)
+ return RDWR_STATUS_DONE;
+ if (ctrl_data != DEBUG_HOST_READY) {
+ dev_info(adapter->dev,
+ "The ctrl reg was changed, re-try again!\n");
+ mwifiex_write_reg(adapter, DEBUG_DUMP_CTRL_REG,
+ DEBUG_HOST_READY);
+ if (ret) {
+ dev_err(adapter->dev, "PCIE write err\n");
+ return RDWR_STATUS_FAILURE;
+ }
+ }
+ usleep_range(100, 200);
+ }
+
+ dev_err(adapter->dev, "Fail to pull ctrl_data\n");
+ return RDWR_STATUS_FAILURE;
+}
+
+/* This function dump firmware memory to file */
+static void mwifiex_pcie_fw_dump_work(struct work_struct *work)
+{
+ struct mwifiex_adapter *adapter =
+ container_of(work, struct mwifiex_adapter, iface_work);
+ unsigned int reg, reg_start, reg_end;
+ u8 *dbg_ptr;
+ struct timeval t;
+ u8 dump_num = 0, idx, i, read_reg, doneflag = 0;
+ enum rdwr_status stat;
+ u32 memory_size;
+ u8 filename[MAX_FULL_NAME_LEN];
+ mm_segment_t fs;
+ loff_t pos;
+ u8 *end_ptr;
+ u8 *name_prefix = "/var/log/fw_dump_";
+ struct memory_type_mapping mem_type_mapping_tbl[] = {
+ {"ITCM", NULL, NULL, 0xF0},
+ {"DTCM", NULL, NULL, 0xF1},
+ {"SQRAM", NULL, NULL, 0xF2},
+ {"IRAM", NULL, NULL, 0xF3},
+ };
+
+ if (!adapter) {
+ dev_err(adapter->dev, "Could not dump firmwware info\n");
+ return;
+ }
+
+ do_gettimeofday(&t);
+ dev_info(adapter->dev, "== mwifiex firmware dump start: %u.%06u ==\n",
+ (u32)t.tv_sec, (u32)t.tv_usec);
+
+ /* Read the number of the memories which will dump */
+ stat = mwifiex_pcie_rdwr_firmware(adapter, doneflag);
+ if (stat == RDWR_STATUS_FAILURE)
+ goto done;
+
+ reg = DEBUG_DUMP_START_REG;
+ mwifiex_read_reg_byte(adapter, reg, &dump_num);
+
+ /* Read the length of every memory which will dump */
+ for (idx = 0; idx < dump_num; idx++) {
+ struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
+
+ stat = mwifiex_pcie_rdwr_firmware(adapter, doneflag);
+ if (stat == RDWR_STATUS_FAILURE)
+ goto done;
+
+ memory_size = 0;
+ reg = DEBUG_DUMP_START_REG;
+ for (i = 0; i < 4; i++) {
+ mwifiex_read_reg_byte(adapter, reg, &read_reg);
+ memory_size |= (read_reg << (i * 8));
+ reg++;
+ }
+
+ if (memory_size == 0) {
+ dev_info(adapter->dev, "Firmware dump Finished!\n");
+ break;
+ }
+
+ dev_info(adapter->dev,
+ "%s_SIZE=0x%x\n", entry->mem_name, memory_size);
+ entry->mem_ptr = vmalloc(memory_size + 1);
+ if (!entry->mem_ptr) {
+ dev_err(adapter->dev,
+ "Vmalloc %s failed\n", entry->mem_name);
+ goto done;
+ }
+ dbg_ptr = entry->mem_ptr;
+ end_ptr = dbg_ptr + memory_size;
+
+ doneflag = entry->done_flag;
+ do_gettimeofday(&t);
+ dev_info(adapter->dev, "Start %s output %u.%06u, please wait...\n",
+ entry->mem_name, (u32)t.tv_sec, (u32)t.tv_usec);
+
+ do {
+ stat = mwifiex_pcie_rdwr_firmware(adapter, doneflag);
+ if (RDWR_STATUS_FAILURE == stat)
+ goto done;
+
+ reg_start = DEBUG_DUMP_START_REG;
+ reg_end = DEBUG_DUMP_END_REG;
+ for (reg = reg_start; reg <= reg_end; reg++) {
+ mwifiex_read_reg_byte(adapter, reg, dbg_ptr);
+ if (dbg_ptr < end_ptr)
+ dbg_ptr++;
+ else
+ dev_err(adapter->dev,
+ "Allocated buf not enough\n");
+ }
+
+ if (stat != RDWR_STATUS_DONE)
+ continue;
+
+ dev_info(adapter->dev, "%s done: size=0x%lx\n",
+ entry->mem_name, dbg_ptr - entry->mem_ptr);
+ memset(filename, 0, sizeof(filename));
+ memcpy(filename, name_prefix, strlen(name_prefix));
+ strcat(filename, entry->mem_name);
+ do_gettimeofday(&t);
+ entry->file_mem = filp_open(filename, O_CREAT | O_RDWR,
+ 0644);
+ if (IS_ERR(entry->file_mem)) {
+ dev_info(adapter->dev,
+ "Create %s file failed at %s, opening another dir /tmp\n",
+ entry->mem_name, filename);
+ memset(filename, 0, sizeof(filename));
+ sprintf(filename, "%s%s", "/tmp/fw_dump_",
+ entry->mem_name);
+ entry->file_mem =
+ filp_open(filename,
+ O_CREAT | O_RDWR, 0644);
+ }
+ if (!IS_ERR(entry->file_mem)) {
+ dev_info(adapter->dev,
+ "Start to save the output : %u.%06u, please wait...\n",
+ (u32)t.tv_sec, (u32)t.tv_usec);
+ fs = get_fs();
+ set_fs(KERNEL_DS);
+ pos = 0;
+ vfs_write(entry->file_mem,
+ (char __user *)entry->mem_ptr,
+ memory_size, &pos);
+ filp_close(entry->file_mem, NULL);
+ set_fs(fs);
+ dev_info(adapter->dev,
+ "The output %s have been saved to file successfully!\n",
+ entry->mem_name);
+ } else {
+ dev_err(adapter->dev,
+ "Failed to create file %s\n", filename);
+ }
+ vfree(entry->mem_ptr);
+ entry->mem_ptr = NULL;
+ break;
+ } while (true);
+ }
+ do_gettimeofday(&t);
+ dev_info(adapter->dev, "== mwifiex firmware dump end: %u.%06u ==\n",
+ (u32)t.tv_sec, (u32)t.tv_usec);
+
+done:
+ for (idx = 0; idx < ARRAY_SIZE(mem_type_mapping_tbl); idx++) {
+ struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
+
+ if (entry->mem_ptr) {
+ vfree(entry->mem_ptr);
+ entry->mem_ptr = NULL;
+ }
+ }
+
+ return;
+}
+
+static void mwifiex_pcie_work(struct work_struct *work)
+{
+ if (test_and_clear_bit(MWIFIEX_PCIE_WORK_FW_DUMP, &pcie_work_flags))
+ mwifiex_pcie_fw_dump_work(work);
+}
+
+/* This function dumps FW information */
+static void mwifiex_pcie_fw_dump(struct mwifiex_adapter *adapter)
+{
+ if (test_bit(MWIFIEX_PCIE_WORK_FW_DUMP, &pcie_work_flags))
+ return;
+
+ set_bit(MWIFIEX_PCIE_WORK_FW_DUMP, &pcie_work_flags);
+
+ schedule_work(&adapter->iface_work);
+}
+
/*
* This function initializes the PCI-E host memory space, WCB rings, etc.
*
@@ -2393,6 +2618,8 @@ static struct mwifiex_if_ops pcie_ops = {
.cleanup_mpa_buf = NULL,
.init_fw_port = mwifiex_pcie_init_fw_port,
.clean_pcie_ring = mwifiex_clean_pcie_ring_buf,
+ .fw_dump = mwifiex_pcie_fw_dump,
+ .iface_work = mwifiex_pcie_work,
};
/*
diff --git a/drivers/net/wireless/mwifiex/pcie.h b/drivers/net/wireless/mwifiex/pcie.h
index e8ec561..3abba32 100644
--- a/drivers/net/wireless/mwifiex/pcie.h
+++ b/drivers/net/wireless/mwifiex/pcie.h
@@ -100,6 +100,28 @@
#define MWIFIEX_DEF_SLEEP_COOKIE 0xBEEFBEEF
#define MWIFIEX_MAX_DELAY_COUNT 5
+#define DEBUG_DUMP_CTRL_REG 0xCF4
+#define DEBUG_DUMP_START_REG 0xCF8
+#define DEBUG_DUMP_END_REG 0xCFF
+#define DEBUG_HOST_READY 0xEE
+#define DEBUG_FW_DONE 0xFF
+
+#define MAX_NAME_LEN 8
+#define MAX_FULL_NAME_LEN 32
+
+struct memory_type_mapping {
+ u8 mem_name[MAX_NAME_LEN];
+ u8 *mem_ptr;
+ struct file *file_mem;
+ u8 done_flag;
+};
+
+enum rdwr_status {
+ RDWR_STATUS_SUCCESS = 0,
+ RDWR_STATUS_FAILURE = 1,
+ RDWR_STATUS_DONE = 2
+};
+
struct mwifiex_pcie_card_reg {
u16 cmd_addr_lo;
u16 cmd_addr_hi;
@@ -322,4 +344,9 @@ mwifiex_pcie_txbd_not_full(struct pcie_service_card *card)
return 0;
}
+
+enum mwifiex_pcie_work_flags {
+ MWIFIEX_PCIE_WORK_FW_DUMP,
+};
+
#endif /* _MWIFIEX_PCIE_H */
--
1.8.2.3
--
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