From 49216c1c170f07c138b043d67cd34c67d75a27cc Mon Sep 17 00:00:00 2001 From: Hariprasad Shenai Date: Tue, 20 Jan 2015 12:02:20 +0530 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- drivers/net/ethernet/chelsio/cxgb4/cxgb4.h | 3 + drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c | 73 +++++++++++++++++++++- drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.h | 3 + drivers/net/ethernet/chelsio/cxgb4/t4_hw.c | 28 ++++++++- drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h | 6 ++ 5 files changed, 110 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h index e468f92..29c5232 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h @@ -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); diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c index 6dabfe5..8b2e230 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c @@ -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; } diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.h index 70fcbc9..e162c61 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.h +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.h @@ -37,6 +37,8 @@ #include +#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 diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c index 734d33e..73da6f5 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c +++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c @@ -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 @@ out: 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) diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h index de82833..1e72cda 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h +++ b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h @@ -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) -- 2.7.4