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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: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hariprasad Shenai 2015-01-20 12:02:20 +05:30 committed by David S. Miller
parent 1650d5455b
commit 49216c1c17
5 changed files with 110 additions and 3 deletions
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3
drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
View File

@ -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);

73
drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
View File

@ -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;
}

3
drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.h
View File

@ -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

28
drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
View File

@ -835,8 +835,8 @@ 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,
unsigned int nwords, u32 *data, int byte_oriented)
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)

6
drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
View File

@ -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)