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Commit 49216c1c authored by Hariprasad Shenai's avatar Hariprasad Shenai Committed by David S. Miller
Browse files

cxgb4: Add debugfs entry to dump the contents of the flash 



Adds support to dump the contents of the flash in the adapter

Signed-off-by: default avatarHariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1650d545

drivers/net/ethernet/chelsio/cxgb4/cxgb4.h

+3 −0
Original line number Diff line number Diff line
@@ -1008,7 +1008,10 @@ static inline int t4_memory_write(struct adapter *adap, int mtype, u32 addr, 


int t4_seeprom_wp(struct adapter *adapter, bool enable);

int get_vpd_params(struct adapter *adapter, struct vpd_params *p);

int t4_read_flash(struct adapter *adapter, unsigned int addr,

		  unsigned int nwords, u32 *data, int byte_oriented);

int t4_load_fw(struct adapter *adapter, const u8 *fw_data, unsigned int size);

int t4_fwcache(struct adapter *adap, enum fw_params_param_dev_fwcache op);

int t4_fw_upgrade(struct adapter *adap, unsigned int mbox,

		  const u8 *fw_data, unsigned int size, int force);

unsigned int t4_flash_cfg_addr(struct adapter *adapter);

drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c

+72 −1
Original line number Diff line number Diff line
@@ -434,6 +434,51 @@ static const struct file_operations devlog_fops = { 
	.release = seq_release_private

};



static ssize_t flash_read(struct file *file, char __user *buf, size_t count,

			  loff_t *ppos)

{

	loff_t pos = *ppos;

	loff_t avail = FILE_DATA(file)->i_size;

	struct adapter *adap = file->private_data;



	if (pos < 0)

		return -EINVAL;

	if (pos >= avail)

		return 0;

	if (count > avail - pos)

		count = avail - pos;



	while (count) {

		size_t len;

		int ret, ofst;

		u8 data[256];



		ofst = pos & 3;

		len = min(count + ofst, sizeof(data));

		ret = t4_read_flash(adap, pos - ofst, (len + 3) / 4,

				    (u32 *)data, 1);

		if (ret)

			return ret;



		len -= ofst;

		if (copy_to_user(buf, data + ofst, len))

			return -EFAULT;



		buf += len;

		pos += len;

		count -= len;

	}

	count = pos - *ppos;

	*ppos = pos;

	return count;

}



static const struct file_operations flash_debugfs_fops = {

	.owner   = THIS_MODULE,

	.open    = mem_open,

	.read    = flash_read,

};



static inline void tcamxy2valmask(u64 x, u64 y, u8 *addr, u64 *mask)

{

	*mask = x | y;
@@ -579,6 +624,21 @@ static const struct file_operations clip_tbl_debugfs_fops = { 
};

#endif



int mem_open(struct inode *inode, struct file *file)

{

	unsigned int mem;

	struct adapter *adap;



	file->private_data = inode->i_private;



	mem = (uintptr_t)file->private_data & 0x3;

	adap = file->private_data - mem;



	(void)t4_fwcache(adap, FW_PARAM_DEV_FWCACHE_FLUSH);



	return 0;

}



static ssize_t mem_read(struct file *file, char __user *buf, size_t count,

			loff_t *ppos)

{
@@ -616,7 +676,6 @@ static ssize_t mem_read(struct file *file, char __user *buf, size_t count, 
	*ppos = pos + count;

	return count;

}



static const struct file_operations mem_debugfs_fops = {

	.owner   = THIS_MODULE,

	.open    = simple_open,
@@ -624,6 +683,12 @@ static const struct file_operations mem_debugfs_fops = { 
	.llseek  = default_llseek,

};



static void set_debugfs_file_size(struct dentry *de, loff_t size)

{

	if (!IS_ERR(de) && de->d_inode)

		de->d_inode->i_size = size;

}



static void add_debugfs_mem(struct adapter *adap, const char *name,

			    unsigned int idx, unsigned int size_mb)

{
@@ -655,6 +720,7 @@ int t4_setup_debugfs(struct adapter *adap) 
{

	int i;

	u32 size;

	struct dentry *de;



	static struct t4_debugfs_entry t4_debugfs_files[] = {

		{ "cim_la", &cim_la_fops, S_IRUSR, 0 },
@@ -697,5 +763,10 @@ int t4_setup_debugfs(struct adapter *adap) 
					EXT_MEM1_SIZE_G(size));

		}

	}



	de = debugfs_create_file("flash", S_IRUSR, adap->debugfs_root, adap,

				 &flash_debugfs_fops);

	set_debugfs_file_size(de, adap->params.sf_size);



	return 0;

}

drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.h

+3 −0
Original line number Diff line number Diff line
@@ -37,6 +37,8 @@ 


#include <linux/export.h>



#define FILE_DATA(_file) ((_file)->f_path.dentry->d_inode)



struct t4_debugfs_entry {

	const char *name;

	const struct file_operations *ops;
@@ -60,5 +62,6 @@ int t4_setup_debugfs(struct adapter *adap); 
void add_debugfs_files(struct adapter *adap,

		       struct t4_debugfs_entry *files,

		       unsigned int nfiles);

int mem_open(struct inode *inode, struct file *file);



#endif

drivers/net/ethernet/chelsio/cxgb4/t4_hw.c

+26 −2
Original line number Diff line number Diff line
@@ -835,7 +835,7 @@ static int flash_wait_op(struct adapter *adapter, int attempts, int delay) 
 *	(i.e., big-endian), otherwise as 32-bit words in the platform's

 *	natural endianess.

 */

static int t4_read_flash(struct adapter *adapter, unsigned int addr,

int t4_read_flash(struct adapter *adapter, unsigned int addr,

		  unsigned int nwords, u32 *data, int byte_oriented)

{

	int ret;
@@ -1239,6 +1239,30 @@ int t4_load_fw(struct adapter *adap, const u8 *fw_data, unsigned int size) 
	return ret;

}



/**

 *	t4_fwcache - firmware cache operation

 *	@adap: the adapter

 *	@op  : the operation (flush or flush and invalidate)

 */

int t4_fwcache(struct adapter *adap, enum fw_params_param_dev_fwcache op)

{

	struct fw_params_cmd c;



	memset(&c, 0, sizeof(c));

	c.op_to_vfn =

		cpu_to_be32(FW_CMD_OP_V(FW_PARAMS_CMD) |

			    FW_CMD_REQUEST_F | FW_CMD_WRITE_F |

			    FW_PARAMS_CMD_PFN_V(adap->fn) |

			    FW_PARAMS_CMD_VFN_V(0));

	c.retval_len16 = cpu_to_be32(FW_LEN16(c));

	c.param[0].mnem =

		cpu_to_be32(FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) |

			    FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_FWCACHE));

	c.param[0].val = (__force __be32)op;



	return t4_wr_mbox(adap, adap->mbox, &c, sizeof(c), NULL);

}



#define ADVERT_MASK (FW_PORT_CAP_SPEED_100M | FW_PORT_CAP_SPEED_1G |\

		     FW_PORT_CAP_SPEED_10G | FW_PORT_CAP_SPEED_40G | \

		     FW_PORT_CAP_ANEG)

drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h

+6 −0
Original line number Diff line number Diff line
@@ -1062,6 +1062,7 @@ enum fw_params_param_dev { 
	FW_PARAMS_PARAM_DEV_MAXORDIRD_QP = 0x13, /* max supported QP IRD/ORD */

	FW_PARAMS_PARAM_DEV_MAXIRD_ADAPTER = 0x14, /* max supported adap IRD */

	FW_PARAMS_PARAM_DEV_ULPTX_MEMWRITE_DSGL = 0x17,

	FW_PARAMS_PARAM_DEV_FWCACHE = 0x18,

};



/*
@@ -1121,6 +1122,11 @@ enum fw_params_param_dmaq { 
	FW_PARAMS_PARAM_DMAQ_EQ_DCBPRIO_ETH = 0x13,

};



enum fw_params_param_dev_fwcache {

	FW_PARAM_DEV_FWCACHE_FLUSH      = 0x00,

	FW_PARAM_DEV_FWCACHE_FLUSHINV   = 0x01,

};



#define FW_PARAMS_MNEM_S	24

#define FW_PARAMS_MNEM_V(x)	((x) << FW_PARAMS_MNEM_S)