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Message-Id: <1519210220-22437-4-git-send-email-arend.vanspriel@broadcom.com>
Date: Wed, 21 Feb 2018 11:50:20 +0100
From: Arend van Spriel <arend.vanspriel@...adcom.com>
To: Kalle Valo <kvalo@...eaurora.org>,
Marcel Holtmann <marcel@...tmann.org>
Cc: linux-wireless@...r.kernel.org, linux-bluetooth@...r.kernel.org,
linux-kernel@...r.kernel.org,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Arend van Spriel <arend.vanspriel@...adcom.com>
Subject: [PATCH 3/3] btmrvl: support sysfs initiated firmware coredump
Since commit 3c47d19ff4dc ("drivers: base: add coredump driver ops")
it is possible to initiate a device coredump from user-space. This
patch adds support for it in btmrvl_sdio adding the .coredump()
driver callback. This makes dump through debugfs obsolete so removing
it.
Signed-off-by: Arend van Spriel <arend.vanspriel@...adcom.com>
---
drivers/bluetooth/btmrvl_debugfs.c | 31 -------------------------------
drivers/bluetooth/btmrvl_drv.h | 2 --
drivers/bluetooth/btmrvl_main.c | 6 ------
drivers/bluetooth/btmrvl_sdio.c | 18 ++++++++++++------
4 files changed, 12 insertions(+), 45 deletions(-)
diff --git a/drivers/bluetooth/btmrvl_debugfs.c b/drivers/bluetooth/btmrvl_debugfs.c
index 1828ed8..023d35e 100644
--- a/drivers/bluetooth/btmrvl_debugfs.c
+++ b/drivers/bluetooth/btmrvl_debugfs.c
@@ -167,35 +167,6 @@ static ssize_t btmrvl_hscmd_read(struct file *file, char __user *userbuf,
.llseek = default_llseek,
};
-static ssize_t btmrvl_fwdump_write(struct file *file, const char __user *ubuf,
- size_t count, loff_t *ppos)
-{
- struct btmrvl_private *priv = file->private_data;
- char buf[16];
- bool result;
-
- memset(buf, 0, sizeof(buf));
-
- if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
- return -EFAULT;
-
- if (strtobool(buf, &result))
- return -EINVAL;
-
- if (!result)
- return -EINVAL;
-
- btmrvl_firmware_dump(priv);
-
- return count;
-}
-
-static const struct file_operations btmrvl_fwdump_fops = {
- .write = btmrvl_fwdump_write,
- .open = simple_open,
- .llseek = default_llseek,
-};
-
void btmrvl_debugfs_init(struct hci_dev *hdev)
{
struct btmrvl_private *priv = hci_get_drvdata(hdev);
@@ -226,8 +197,6 @@ void btmrvl_debugfs_init(struct hci_dev *hdev)
priv, &btmrvl_hscmd_fops);
debugfs_create_file("hscfgcmd", 0644, dbg->config_dir,
priv, &btmrvl_hscfgcmd_fops);
- debugfs_create_file("fw_dump", 0200, dbg->config_dir,
- priv, &btmrvl_fwdump_fops);
dbg->status_dir = debugfs_create_dir("status", hdev->debugfs);
debugfs_create_u8("curpsmode", 0444, dbg->status_dir,
diff --git a/drivers/bluetooth/btmrvl_drv.h b/drivers/bluetooth/btmrvl_drv.h
index fc3caf4..f045454 100644
--- a/drivers/bluetooth/btmrvl_drv.h
+++ b/drivers/bluetooth/btmrvl_drv.h
@@ -110,7 +110,6 @@ struct btmrvl_private {
u8 *payload, u16 nb);
int (*hw_wakeup_firmware)(struct btmrvl_private *priv);
int (*hw_process_int_status)(struct btmrvl_private *priv);
- void (*firmware_dump)(struct btmrvl_private *priv);
spinlock_t driver_lock; /* spinlock used by driver */
#ifdef CONFIG_DEBUG_FS
void *debugfs_data;
@@ -183,7 +182,6 @@ struct btmrvl_event {
int btmrvl_enable_ps(struct btmrvl_private *priv);
int btmrvl_prepare_command(struct btmrvl_private *priv);
int btmrvl_enable_hs(struct btmrvl_private *priv);
-void btmrvl_firmware_dump(struct btmrvl_private *priv);
#ifdef CONFIG_DEBUG_FS
void btmrvl_debugfs_init(struct hci_dev *hdev);
diff --git a/drivers/bluetooth/btmrvl_main.c b/drivers/bluetooth/btmrvl_main.c
index b280d46..e5cf14d 100644
--- a/drivers/bluetooth/btmrvl_main.c
+++ b/drivers/bluetooth/btmrvl_main.c
@@ -358,12 +358,6 @@ int btmrvl_prepare_command(struct btmrvl_private *priv)
return ret;
}
-void btmrvl_firmware_dump(struct btmrvl_private *priv)
-{
- if (priv->firmware_dump)
- priv->firmware_dump(priv);
-}
-
static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb)
{
int ret = 0;
diff --git a/drivers/bluetooth/btmrvl_sdio.c b/drivers/bluetooth/btmrvl_sdio.c
index 7dbb446..0f02025 100644
--- a/drivers/bluetooth/btmrvl_sdio.c
+++ b/drivers/bluetooth/btmrvl_sdio.c
@@ -1311,9 +1311,11 @@ rdwr_status btmrvl_sdio_rdwr_firmware(struct btmrvl_private *priv,
}
/* This function dump sdio register and memory data */
-static void btmrvl_sdio_dump_firmware(struct btmrvl_private *priv)
+static int btmrvl_sdio_coredump(struct device *dev)
{
- struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
+ struct sdio_func *func = dev_to_sdio_func(dev);
+ struct btmrvl_sdio_card *card;
+ struct btmrvl_private *priv;
int ret = 0;
unsigned int reg, reg_start, reg_end;
enum rdwr_status stat;
@@ -1321,12 +1323,15 @@ static void btmrvl_sdio_dump_firmware(struct btmrvl_private *priv)
u8 dump_num = 0, idx, i, read_reg, doneflag = 0;
u32 memory_size, fw_dump_len = 0;
+ card = sdio_get_drvdata(func);
+ priv = card->priv;
+
/* dump sdio register first */
btmrvl_sdio_dump_regs(priv);
if (!card->supports_fw_dump) {
BT_ERR("Firmware dump not supported for this card!");
- return;
+ return -ENODATA;
}
for (idx = 0; idx < ARRAY_SIZE(mem_type_mapping_tbl); idx++) {
@@ -1445,12 +1450,12 @@ static void btmrvl_sdio_dump_firmware(struct btmrvl_private *priv)
sdio_release_host(card->func);
if (fw_dump_len == 0)
- return;
+ return -ENODATA;
fw_dump_data = vzalloc(fw_dump_len+1);
if (!fw_dump_data) {
BT_ERR("Vzalloc fw_dump_data fail!");
- return;
+ return -ENOMEM;
}
fw_dump_ptr = fw_dump_data;
@@ -1487,6 +1492,7 @@ static void btmrvl_sdio_dump_firmware(struct btmrvl_private *priv)
*/
dev_coredumpv(&card->func->dev, fw_dump_data, fw_dump_len, GFP_KERNEL);
BT_INFO("== btmrvl firmware dump to /sys/class/devcoredump end");
+ return 0;
}
static int btmrvl_sdio_probe(struct sdio_func *func,
@@ -1547,7 +1553,6 @@ static int btmrvl_sdio_probe(struct sdio_func *func,
priv->hw_host_to_card = btmrvl_sdio_host_to_card;
priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw;
priv->hw_process_int_status = btmrvl_sdio_process_int_status;
- priv->firmware_dump = btmrvl_sdio_dump_firmware;
if (btmrvl_register_hdev(priv)) {
BT_ERR("Register hdev failed!");
@@ -1717,6 +1722,7 @@ static int btmrvl_sdio_resume(struct device *dev)
.remove = btmrvl_sdio_remove,
.drv = {
.owner = THIS_MODULE,
+ .coredump = btmrvl_sdio_coredump,
.pm = &btmrvl_sdio_pm_ops,
}
};
--
1.9.1
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