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Commit b3b3c9e0 authored by Rama Krishna Phani A's avatar Rama Krishna Phani A Committed by Gerrit - the friendly Code Review server
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msm: sps: Add debugfs support for IPC logging in SPS driver 



IPC logging for SPS driver, helps monitoring the interactions
between BAM clients and SPS driver and helps tracking the BAM
status. Add debugfs support such that clients can specify the
loglevel at runtime for IPC logging through debugfs.

Change-Id: Ie5b833a211c8decdcc8c41c376a2adc07ab4ba65
Signed-off-by: default avatarRama Krishna Phani A <rphani@codeaurora.org>
parent ff03d8c3

drivers/platform/msm/sps/sps.c

+18 −0
Original line number Diff line number Diff line
@@ -57,6 +57,11 @@ u8 reg_dump_option; 
u32 testbus_sel;

u32 bam_pipe_sel;

u32 desc_option;

/**

 * Specifies range of log level from level 0 to level 3 to have fine-granularity for logging

 * to serve all BAM use cases.

 */

u32 log_level_sel;



static char *debugfs_buf;

static u32 debugfs_buf_size;
@@ -73,6 +78,7 @@ struct dentry *dfile_testbus_sel; 
struct dentry *dfile_bam_pipe_sel;

struct dentry *dfile_desc_option;

struct dentry *dfile_bam_addr;

struct dentry *dfile_log_level_sel;



static struct sps_bam *phy2bam(phys_addr_t phys_addr);
@@ -283,6 +289,7 @@ static ssize_t sps_set_bam_addr(struct file *file, const char __user *buf, 
	} else {

		vir_addr = &bam->base;

		num_pipes = bam->props.num_pipes;

		bam->ipc_loglevel = log_level_sel;

	}



	switch (reg_dump_option) {
@@ -493,6 +500,7 @@ static void sps_debugfs_init(void) 
	debugfs_buf_size = 0;

	debugfs_buf_used = 0;

	wraparound = false;

	log_level_sel = 0;



	dent = debugfs_create_dir("sps", 0);

	if (IS_ERR(dent)) {
@@ -568,8 +576,17 @@ static void sps_debugfs_init(void) 
		goto bam_addr_err;

	}



	dfile_log_level_sel = debugfs_create_u32("log_level_sel", 0664,

						dent, &log_level_sel);

	if (!dfile_log_level_sel || IS_ERR(dfile_log_level_sel)) {

		pr_err("sps:fail to create debug_fs file for log_level_sel.\n");

		goto bam_log_level_err;

	}



	return;



bam_log_level_err:

	debugfs_remove(dfile_bam_addr);

bam_addr_err:

	debugfs_remove(dfile_desc_option);

desc_option_err:
@@ -612,6 +629,7 @@ static void sps_debugfs_exit(void) 
		debugfs_remove(dfile_bam_addr);

	if (dent)

		debugfs_remove(dent);

	debugfs_remove(dfile_log_level_sel);

	kfree(debugfs_buf);

	debugfs_buf = NULL;

}