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Commit bf7c781d authored by Hariprasad Shenai's avatar Hariprasad Shenai Committed by David S. Miller
Browse files

cxgb4: Add support to dump mailbox content in debugfs 



Adds support to dump the current contents of mailbox and the driver which owns
it.

Signed-off-by: default avatarHariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 797ff0f5

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

+85 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ 


#include "cxgb4.h"

#include "t4_regs.h"

#include "t4_values.h"

#include "t4fw_api.h"

#include "cxgb4_debugfs.h"

#include "clip_tbl.h"
@@ -920,6 +921,82 @@ static const struct file_operations devlog_fops = { 
	.release = seq_release_private

};



static int mbox_show(struct seq_file *seq, void *v)

{

	static const char * const owner[] = { "none", "FW", "driver",

					      "unknown" };



	int i;

	unsigned int mbox = (uintptr_t)seq->private & 7;

	struct adapter *adap = seq->private - mbox;

	void __iomem *addr = adap->regs + PF_REG(mbox, CIM_PF_MAILBOX_DATA_A);

	unsigned int ctrl_reg = (is_t4(adap->params.chip)

				 ? CIM_PF_MAILBOX_CTRL_A

				 : CIM_PF_MAILBOX_CTRL_SHADOW_COPY_A);

	void __iomem *ctrl = adap->regs + PF_REG(mbox, ctrl_reg);



	i = MBOWNER_G(readl(ctrl));

	seq_printf(seq, "mailbox owned by %s\n\n", owner[i]);



	for (i = 0; i < MBOX_LEN; i += 8)

		seq_printf(seq, "%016llx\n",

			   (unsigned long long)readq(addr + i));

	return 0;

}



static int mbox_open(struct inode *inode, struct file *file)

{

	return single_open(file, mbox_show, inode->i_private);

}



static ssize_t mbox_write(struct file *file, const char __user *buf,

			  size_t count, loff_t *pos)

{

	int i;

	char c = '\n', s[256];

	unsigned long long data[8];

	const struct inode *ino;

	unsigned int mbox;

	struct adapter *adap;

	void __iomem *addr;

	void __iomem *ctrl;



	if (count > sizeof(s) - 1 || !count)

		return -EINVAL;

	if (copy_from_user(s, buf, count))

		return -EFAULT;

	s[count] = '\0';



	if (sscanf(s, "%llx %llx %llx %llx %llx %llx %llx %llx%c", &data[0],

		   &data[1], &data[2], &data[3], &data[4], &data[5], &data[6],

		   &data[7], &c) < 8 || c != '\n')

		return -EINVAL;



	ino = FILE_DATA(file);

	mbox = (uintptr_t)ino->i_private & 7;

	adap = ino->i_private - mbox;

	addr = adap->regs + PF_REG(mbox, CIM_PF_MAILBOX_DATA_A);

	ctrl = addr + MBOX_LEN;



	if (MBOWNER_G(readl(ctrl)) != X_MBOWNER_PL)

		return -EBUSY;



	for (i = 0; i < 8; i++)

		writeq(data[i], addr + 8 * i);



	writel(MBMSGVALID_F | MBOWNER_V(X_MBOWNER_FW), ctrl);

	return count;

}



static const struct file_operations mbox_debugfs_fops = {

	.owner   = THIS_MODULE,

	.open    = mbox_open,

	.read    = seq_read,

	.llseek  = seq_lseek,

	.release = single_release,

	.write   = mbox_write

};



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

			  loff_t *ppos)

{
@@ -1881,6 +1958,14 @@ int t4_setup_debugfs(struct adapter *adap) 
		{ "cim_qcfg", &cim_qcfg_fops, S_IRUSR, 0 },

		{ "clk", &clk_debugfs_fops, S_IRUSR, 0 },

		{ "devlog", &devlog_fops, S_IRUSR, 0 },

		{ "mbox0", &mbox_debugfs_fops, S_IRUSR | S_IWUSR, 0 },

		{ "mbox1", &mbox_debugfs_fops, S_IRUSR | S_IWUSR, 1 },

		{ "mbox2", &mbox_debugfs_fops, S_IRUSR | S_IWUSR, 2 },

		{ "mbox3", &mbox_debugfs_fops, S_IRUSR | S_IWUSR, 3 },

		{ "mbox4", &mbox_debugfs_fops, S_IRUSR | S_IWUSR, 4 },

		{ "mbox5", &mbox_debugfs_fops, S_IRUSR | S_IWUSR, 5 },

		{ "mbox6", &mbox_debugfs_fops, S_IRUSR | S_IWUSR, 6 },

		{ "mbox7", &mbox_debugfs_fops, S_IRUSR | S_IWUSR, 7 },

		{ "l2t", &t4_l2t_fops, S_IRUSR, 0},

		{ "mps_tcam", &mps_tcam_debugfs_fops, S_IRUSR, 0 },

		{ "rss", &rss_debugfs_fops, S_IRUSR, 0 },

drivers/net/ethernet/chelsio/cxgb4/t4_regs.h

+1 −0
Original line number Diff line number Diff line
@@ -947,6 +947,7 @@ 


/* registers for module CIM */

#define CIM_BOOT_CFG_A 0x7b00

#define CIM_PF_MAILBOX_CTRL_SHADOW_COPY_A 0x290



#define  BOOTADDR_M	0xffffff00U

drivers/net/ethernet/chelsio/cxgb4/t4_values.h

+5 −0
Original line number Diff line number Diff line
@@ -79,6 +79,11 @@ 
#define SGE_UDB_GTS		20

#define SGE_UDB_WCDOORBELL	64



/* CIM register field values.

 */

#define X_MBOWNER_FW			1

#define X_MBOWNER_PL			2



/* PCI-E definitions */

#define WINDOW_SHIFT_X		10

#define PCIEOFST_SHIFT_X	10