[PATCH 0/4] firmware: cs_dsp: Some small coding improvements

[PATCH 0/4] firmware: cs_dsp: Some small coding improvements

[Richard Fitzgerald]

Commit series that makes some small improvements to code and the
kernel log messages.

Richard Fitzgerald (4):
  firmware: cs_dsp: Don't allocate temporary buffer for info text
  firmware: cs_dsp: Make wmfw and bin filename arguments const char *
  firmware: cs_dsp: Merge wmfw format log message into INFO message
  firmware: cs_dsp: Rename fw_ver to wmfw_ver

 drivers/firmware/cirrus/cs_dsp.c       | 64 +++++++++-----------------
 include/linux/firmware/cirrus/cs_dsp.h | 10 ++--
 sound/soc/codecs/wm_adsp.c             |  2 +-
 3 files changed, 27 insertions(+), 49 deletions(-)

-- 
2.39.2

[PATCH 1/4] firmware: cs_dsp: Don't allocate temporary buffer for info text

[Richard Fitzgerald]

Don't allocate a temporary buffer to hold a NUL-terminated copy
of the NAME/INFO string from the wmfw/bin. It can be printed
directly to the log. Also limit the maximum number of characters
that will be logged from this string.

The NAME/INFO blocks in the firmware files are an array of
characters with a length, not a NUL-terminated C string. The
original code allocated a temporary buffer to make a
NUL-terminated copy of the string and then passed that to
dev_info(). There's no need for this: printf formatting can
use "%.*s" to print a character array of a given length.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
---
 drivers/firmware/cirrus/cs_dsp.c | 35 +++++++-------------------------
 1 file changed, 7 insertions(+), 28 deletions(-)

diff --git a/drivers/firmware/cirrus/cs_dsp.c b/drivers/firmware/cirrus/cs_dsp.c
index 89fd63205a6e..bf25107a98ee 100644
--- a/drivers/firmware/cirrus/cs_dsp.c
+++ b/drivers/firmware/cirrus/cs_dsp.c
@@ -12,6 +12,7 @@
 #include <linux/ctype.h>
 #include <linux/debugfs.h>
 #include <linux/delay.h>
+#include <linux/minmax.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/seq_file.h>
@@ -1473,7 +1474,6 @@ static int cs_dsp_load(struct cs_dsp *dsp, const struct firmware *firmware,
 	const struct wmfw_region *region;
 	const struct cs_dsp_region *mem;
 	const char *region_name;
-	char *text = NULL;
 	struct cs_dsp_buf *buf;
 	unsigned int reg;
 	int regions = 0;
@@ -1545,15 +1545,15 @@ static int cs_dsp_load(struct cs_dsp *dsp, const struct firmware *firmware,
 
 		region_name = "Unknown";
 		reg = 0;
-		text = NULL;
 		offset = le32_to_cpu(region->offset) & 0xffffff;
 		type = be32_to_cpu(region->type) & 0xff;
 
 		switch (type) {
+		case WMFW_INFO_TEXT:
 		case WMFW_NAME_TEXT:
-			region_name = "Firmware name";
-			text = kzalloc(le32_to_cpu(region->len) + 1,
-				       GFP_KERNEL);
+			region_name = "Info/Name";
+			cs_dsp_info(dsp, "%s: %.*s\n", file,
+				    min(le32_to_cpu(region->len), 100), region->data);
 			break;
 		case WMFW_ALGORITHM_DATA:
 			region_name = "Algorithm";
@@ -1561,11 +1561,6 @@ static int cs_dsp_load(struct cs_dsp *dsp, const struct firmware *firmware,
 			if (ret != 0)
 				goto out_fw;
 			break;
-		case WMFW_INFO_TEXT:
-			region_name = "Information";
-			text = kzalloc(le32_to_cpu(region->len) + 1,
-				       GFP_KERNEL);
-			break;
 		case WMFW_ABSOLUTE:
 			region_name = "Absolute";
 			reg = offset;
@@ -1599,13 +1594,6 @@ static int cs_dsp_load(struct cs_dsp *dsp, const struct firmware *firmware,
 			   regions, le32_to_cpu(region->len), offset,
 			   region_name);
 
-		if (text) {
-			memcpy(text, region->data, le32_to_cpu(region->len));
-			cs_dsp_info(dsp, "%s: %s\n", file, text);
-			kfree(text);
-			text = NULL;
-		}
-
 		if (reg) {
 			buf = cs_dsp_buf_alloc(region->data,
 					       le32_to_cpu(region->len),
@@ -1647,7 +1635,6 @@ static int cs_dsp_load(struct cs_dsp *dsp, const struct firmware *firmware,
 out_fw:
 	regmap_async_complete(regmap);
 	cs_dsp_buf_free(&buf_list);
-	kfree(text);
 
 	if (ret == -EOVERFLOW)
 		cs_dsp_err(dsp, "%s: file content overflows file data\n", file);
@@ -2180,7 +2167,6 @@ static int cs_dsp_load_coeff(struct cs_dsp *dsp, const struct firmware *firmware
 	struct cs_dsp_alg_region *alg_region;
 	const char *region_name;
 	int ret, pos, blocks, type, offset, reg, version;
-	char *text = NULL;
 	struct cs_dsp_buf *buf;
 
 	if (!firmware)
@@ -2249,7 +2235,8 @@ static int cs_dsp_load_coeff(struct cs_dsp *dsp, const struct firmware *firmware
 		region_name = "Unknown";
 		switch (type) {
 		case (WMFW_NAME_TEXT << 8):
-			text = kzalloc(le32_to_cpu(blk->len) + 1, GFP_KERNEL);
+			cs_dsp_info(dsp, "%s: %.*s\n", dsp->fw_name,
+				    min(le32_to_cpu(blk->len), 100), blk->data);
 			break;
 		case (WMFW_INFO_TEXT << 8):
 		case (WMFW_METADATA << 8):
@@ -2321,13 +2308,6 @@ static int cs_dsp_load_coeff(struct cs_dsp *dsp, const struct firmware *firmware
 			break;
 		}
 
-		if (text) {
-			memcpy(text, blk->data, le32_to_cpu(blk->len));
-			cs_dsp_info(dsp, "%s: %s\n", dsp->fw_name, text);
-			kfree(text);
-			text = NULL;
-		}
-
 		if (reg) {
 			buf = cs_dsp_buf_alloc(blk->data,
 					       le32_to_cpu(blk->len),
@@ -2367,7 +2347,6 @@ static int cs_dsp_load_coeff(struct cs_dsp *dsp, const struct firmware *firmware
 out_fw:
 	regmap_async_complete(regmap);
 	cs_dsp_buf_free(&buf_list);
-	kfree(text);
 
 	if (ret == -EOVERFLOW)
 		cs_dsp_err(dsp, "%s: file content overflows file data\n", file);
-- 
2.39.2

[PATCH 2/4] firmware: cs_dsp: Make wmfw and bin filename arguments const char *

[Richard Fitzgerald]

The wmfw_filename and bin_filename strings passed into cs_dsp_power_up()
and cs_dsp_adsp1_power_up() should be const char *.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
---
 drivers/firmware/cirrus/cs_dsp.c       | 8 ++++----
 include/linux/firmware/cirrus/cs_dsp.h | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/firmware/cirrus/cs_dsp.c b/drivers/firmware/cirrus/cs_dsp.c
index bf25107a98ee..1bc2e0b6d40b 100644
--- a/drivers/firmware/cirrus/cs_dsp.c
+++ b/drivers/firmware/cirrus/cs_dsp.c
@@ -2413,8 +2413,8 @@ EXPORT_SYMBOL_NS_GPL(cs_dsp_adsp1_init, FW_CS_DSP);
  * Return: Zero for success, a negative number on error.
  */
 int cs_dsp_adsp1_power_up(struct cs_dsp *dsp,
-			  const struct firmware *wmfw_firmware, char *wmfw_filename,
-			  const struct firmware *coeff_firmware, char *coeff_filename,
+			  const struct firmware *wmfw_firmware, const char *wmfw_filename,
+			  const struct firmware *coeff_firmware, const char *coeff_filename,
 			  const char *fw_name)
 {
 	unsigned int val;
@@ -2707,8 +2707,8 @@ static void cs_dsp_halo_stop_watchdog(struct cs_dsp *dsp)
  * Return: Zero for success, a negative number on error.
  */
 int cs_dsp_power_up(struct cs_dsp *dsp,
-		    const struct firmware *wmfw_firmware, char *wmfw_filename,
-		    const struct firmware *coeff_firmware, char *coeff_filename,
+		    const struct firmware *wmfw_firmware, const char *wmfw_filename,
+		    const struct firmware *coeff_firmware, const char *coeff_filename,
 		    const char *fw_name)
 {
 	int ret;
diff --git a/include/linux/firmware/cirrus/cs_dsp.h b/include/linux/firmware/cirrus/cs_dsp.h
index 82687e07a7c2..8078dc377948 100644
--- a/include/linux/firmware/cirrus/cs_dsp.h
+++ b/include/linux/firmware/cirrus/cs_dsp.h
@@ -213,13 +213,13 @@ int cs_dsp_adsp2_init(struct cs_dsp *dsp);
 int cs_dsp_halo_init(struct cs_dsp *dsp);
 
 int cs_dsp_adsp1_power_up(struct cs_dsp *dsp,
-			  const struct firmware *wmfw_firmware, char *wmfw_filename,
-			  const struct firmware *coeff_firmware, char *coeff_filename,
+			  const struct firmware *wmfw_firmware, const char *wmfw_filename,
+			  const struct firmware *coeff_firmware, const char *coeff_filename,
 			  const char *fw_name);
 void cs_dsp_adsp1_power_down(struct cs_dsp *dsp);
 int cs_dsp_power_up(struct cs_dsp *dsp,
-		    const struct firmware *wmfw_firmware, char *wmfw_filename,
-		    const struct firmware *coeff_firmware, char *coeff_filename,
+		    const struct firmware *wmfw_firmware, const char *wmfw_filename,
+		    const struct firmware *coeff_firmware, const char *coeff_filename,
 		    const char *fw_name);
 void cs_dsp_power_down(struct cs_dsp *dsp);
 int cs_dsp_run(struct cs_dsp *dsp);
-- 
2.39.2

[PATCH 3/4] firmware: cs_dsp: Merge wmfw format log message into INFO message

[Richard Fitzgerald]

Log the WMFW file format version with the INFO_TEST message.

The behaviour of firmware controls depends on the WMFW format version,
so this is useful information to log for debugging. But there's no
need to use a separate log line just for this value.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
---
 drivers/firmware/cirrus/cs_dsp.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/firmware/cirrus/cs_dsp.c b/drivers/firmware/cirrus/cs_dsp.c
index 1bc2e0b6d40b..141a6c9d6737 100644
--- a/drivers/firmware/cirrus/cs_dsp.c
+++ b/drivers/firmware/cirrus/cs_dsp.c
@@ -1502,7 +1502,6 @@ static int cs_dsp_load(struct cs_dsp *dsp, const struct firmware *firmware,
 		goto out_fw;
 	}
 
-	cs_dsp_info(dsp, "Firmware version: %d\n", header->ver);
 	dsp->fw_ver = header->ver;
 
 	if (header->core != dsp->type) {
@@ -1552,7 +1551,7 @@ static int cs_dsp_load(struct cs_dsp *dsp, const struct firmware *firmware,
 		case WMFW_INFO_TEXT:
 		case WMFW_NAME_TEXT:
 			region_name = "Info/Name";
-			cs_dsp_info(dsp, "%s: %.*s\n", file,
+			cs_dsp_info(dsp, "%s (rev %d): %.*s\n", file, dsp->fw_ver,
 				    min(le32_to_cpu(region->len), 100), region->data);
 			break;
 		case WMFW_ALGORITHM_DATA:
-- 
2.39.2

Re: [PATCH 3/4] firmware: cs_dsp: Merge wmfw format log message into INFO message

[Charles Keepax]

On Tue, Jul 09, 2024 at 03:51:55PM +0100, Richard Fitzgerald wrote:
> Log the WMFW file format version with the INFO_TEST message.
> 
> The behaviour of firmware controls depends on the WMFW format version,
> so this is useful information to log for debugging. But there's no
> need to use a separate log line just for this value.
> 
> Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
> ---
>  drivers/firmware/cirrus/cs_dsp.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/firmware/cirrus/cs_dsp.c b/drivers/firmware/cirrus/cs_dsp.c
> index 1bc2e0b6d40b..141a6c9d6737 100644
> --- a/drivers/firmware/cirrus/cs_dsp.c
> +++ b/drivers/firmware/cirrus/cs_dsp.c
> @@ -1502,7 +1502,6 @@ static int cs_dsp_load(struct cs_dsp *dsp, const struct firmware *firmware,
>  		goto out_fw;
>  	}
>  
> -	cs_dsp_info(dsp, "Firmware version: %d\n", header->ver);
>  	dsp->fw_ver = header->ver;
>  
>  	if (header->core != dsp->type) {
> @@ -1552,7 +1551,7 @@ static int cs_dsp_load(struct cs_dsp *dsp, const struct firmware *firmware,
>  		case WMFW_INFO_TEXT:
>  		case WMFW_NAME_TEXT:
>  			region_name = "Info/Name";
> -			cs_dsp_info(dsp, "%s: %.*s\n", file,
> +			cs_dsp_info(dsp, "%s (rev %d): %.*s\n", file, dsp->fw_ver,
>  				    min(le32_to_cpu(region->len), 100), region->data);

Are we sure on this one? I don't think a WMFW is required to
include an INFO/NAME block so it is now possible for this to not
get printed. Granted I have not seen one that doesn't include
at least one of these blocks but it isn't required. I think I
would lean towards keening the separate print personally.

Thanks,
Charles

Re: [PATCH 3/4] firmware: cs_dsp: Merge wmfw format log message into INFO message

[Richard Fitzgerald]

On 09/07/2024 16:33, Charles Keepax wrote:
> On Tue, Jul 09, 2024 at 03:51:55PM +0100, Richard Fitzgerald wrote:
>> Log the WMFW file format version with the INFO_TEST message.
>>
>> The behaviour of firmware controls depends on the WMFW format version,
>> so this is useful information to log for debugging. But there's no
>> need to use a separate log line just for this value.
>>
>> Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
>> ---
>>   drivers/firmware/cirrus/cs_dsp.c | 3 +--
>>   1 file changed, 1 insertion(+), 2 deletions(-)
>>
>> diff --git a/drivers/firmware/cirrus/cs_dsp.c b/drivers/firmware/cirrus/cs_dsp.c
>> index 1bc2e0b6d40b..141a6c9d6737 100644
>> --- a/drivers/firmware/cirrus/cs_dsp.c
>> +++ b/drivers/firmware/cirrus/cs_dsp.c
>> @@ -1502,7 +1502,6 @@ static int cs_dsp_load(struct cs_dsp *dsp, const struct firmware *firmware,
>>   		goto out_fw;
>>   	}
>>   
>> -	cs_dsp_info(dsp, "Firmware version: %d\n", header->ver);
>>   	dsp->fw_ver = header->ver;
>>   
>>   	if (header->core != dsp->type) {
>> @@ -1552,7 +1551,7 @@ static int cs_dsp_load(struct cs_dsp *dsp, const struct firmware *firmware,
>>   		case WMFW_INFO_TEXT:
>>   		case WMFW_NAME_TEXT:
>>   			region_name = "Info/Name";
>> -			cs_dsp_info(dsp, "%s: %.*s\n", file,
>> +			cs_dsp_info(dsp, "%s (rev %d): %.*s\n", file, dsp->fw_ver,
>>   				    min(le32_to_cpu(region->len), 100), region->data);
> 
> Are we sure on this one? I don't think a WMFW is required to
> include an INFO/NAME block so it is now possible for this to not
> get printed. Granted I have not seen one that doesn't include
> at least one of these blocks but it isn't required. I think I
> would lean towards keening the separate print personally.
> 
> Thanks,
> Charles

The specification says that the first INFO block is mandatory, but
specifications can change so I don't mind leaving it on its own line.

I've just noticed a typo in the commit description (INFO_TEST should be
INFO_TEXT) so I want to send a V2 chain anyway.

[PATCH 4/4] firmware: cs_dsp: Rename fw_ver to wmfw_ver

[Richard Fitzgerald]

Rename the confusingly named struct member fw_ver to wmfw_ver. It
contains the wmfw format version of the loaded wmfw file.

This commit also contains an update to wm_adsp for the new name.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
---
 drivers/firmware/cirrus/cs_dsp.c       | 22 +++++++++++-----------
 include/linux/firmware/cirrus/cs_dsp.h |  2 +-
 sound/soc/codecs/wm_adsp.c             |  2 +-
 3 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/firmware/cirrus/cs_dsp.c b/drivers/firmware/cirrus/cs_dsp.c
index 141a6c9d6737..b4dd1a768f1e 100644
--- a/drivers/firmware/cirrus/cs_dsp.c
+++ b/drivers/firmware/cirrus/cs_dsp.c
@@ -1051,7 +1051,7 @@ static int cs_dsp_create_control(struct cs_dsp *dsp,
 
 	ctl->fw_name = dsp->fw_name;
 	ctl->alg_region = *alg_region;
-	if (subname && dsp->fw_ver >= 2) {
+	if (subname && dsp->wmfw_ver >= 2) {
 		ctl->subname_len = subname_len;
 		ctl->subname = kasprintf(GFP_KERNEL, "%.*s", subname_len, subname);
 		if (!ctl->subname) {
@@ -1178,7 +1178,7 @@ static int cs_dsp_coeff_parse_alg(struct cs_dsp *dsp,
 
 	raw = (const struct wmfw_adsp_alg_data *)region->data;
 
-	switch (dsp->fw_ver) {
+	switch (dsp->wmfw_ver) {
 	case 0:
 	case 1:
 		if (sizeof(*raw) > data_len)
@@ -1255,7 +1255,7 @@ static int cs_dsp_coeff_parse_coeff(struct cs_dsp *dsp,
 	blk->offset = le16_to_cpu(raw->hdr.offset);
 	blk->mem_type = le16_to_cpu(raw->hdr.type);
 
-	switch (dsp->fw_ver) {
+	switch (dsp->wmfw_ver) {
 	case 0:
 	case 1:
 		if (sizeof(*raw) > (data_len - pos))
@@ -1502,7 +1502,7 @@ static int cs_dsp_load(struct cs_dsp *dsp, const struct firmware *firmware,
 		goto out_fw;
 	}
 
-	dsp->fw_ver = header->ver;
+	dsp->wmfw_ver = header->ver;
 
 	if (header->core != dsp->type) {
 		cs_dsp_err(dsp, "%s: invalid core %d != %d\n",
@@ -1551,7 +1551,7 @@ static int cs_dsp_load(struct cs_dsp *dsp, const struct firmware *firmware,
 		case WMFW_INFO_TEXT:
 		case WMFW_NAME_TEXT:
 			region_name = "Info/Name";
-			cs_dsp_info(dsp, "%s (rev %d): %.*s\n", file, dsp->fw_ver,
+			cs_dsp_info(dsp, "%s (rev %d): %.*s\n", file, dsp->wmfw_ver,
 				    min(le32_to_cpu(region->len), 100), region->data);
 			break;
 		case WMFW_ALGORITHM_DATA:
@@ -1782,7 +1782,7 @@ static struct cs_dsp_alg_region *cs_dsp_create_region(struct cs_dsp *dsp,
 
 	list_add_tail(&alg_region->list, &dsp->alg_regions);
 
-	if (dsp->fw_ver > 0)
+	if (dsp->wmfw_ver > 0)
 		cs_dsp_ctl_fixup_base(dsp, alg_region);
 
 	return alg_region;
@@ -1905,7 +1905,7 @@ static int cs_dsp_adsp1_setup_algs(struct cs_dsp *dsp)
 			ret = PTR_ERR(alg_region);
 			goto out;
 		}
-		if (dsp->fw_ver == 0) {
+		if (dsp->wmfw_ver == 0) {
 			if (i + 1 < n_algs) {
 				len = be32_to_cpu(adsp1_alg[i + 1].dm);
 				len -= be32_to_cpu(adsp1_alg[i].dm);
@@ -1927,7 +1927,7 @@ static int cs_dsp_adsp1_setup_algs(struct cs_dsp *dsp)
 			ret = PTR_ERR(alg_region);
 			goto out;
 		}
-		if (dsp->fw_ver == 0) {
+		if (dsp->wmfw_ver == 0) {
 			if (i + 1 < n_algs) {
 				len = be32_to_cpu(adsp1_alg[i + 1].zm);
 				len -= be32_to_cpu(adsp1_alg[i].zm);
@@ -2018,7 +2018,7 @@ static int cs_dsp_adsp2_setup_algs(struct cs_dsp *dsp)
 			ret = PTR_ERR(alg_region);
 			goto out;
 		}
-		if (dsp->fw_ver == 0) {
+		if (dsp->wmfw_ver == 0) {
 			if (i + 1 < n_algs) {
 				len = be32_to_cpu(adsp2_alg[i + 1].xm);
 				len -= be32_to_cpu(adsp2_alg[i].xm);
@@ -2040,7 +2040,7 @@ static int cs_dsp_adsp2_setup_algs(struct cs_dsp *dsp)
 			ret = PTR_ERR(alg_region);
 			goto out;
 		}
-		if (dsp->fw_ver == 0) {
+		if (dsp->wmfw_ver == 0) {
 			if (i + 1 < n_algs) {
 				len = be32_to_cpu(adsp2_alg[i + 1].ym);
 				len -= be32_to_cpu(adsp2_alg[i].ym);
@@ -2062,7 +2062,7 @@ static int cs_dsp_adsp2_setup_algs(struct cs_dsp *dsp)
 			ret = PTR_ERR(alg_region);
 			goto out;
 		}
-		if (dsp->fw_ver == 0) {
+		if (dsp->wmfw_ver == 0) {
 			if (i + 1 < n_algs) {
 				len = be32_to_cpu(adsp2_alg[i + 1].zm);
 				len -= be32_to_cpu(adsp2_alg[i].zm);
diff --git a/include/linux/firmware/cirrus/cs_dsp.h b/include/linux/firmware/cirrus/cs_dsp.h
index 8078dc377948..2e649810169f 100644
--- a/include/linux/firmware/cirrus/cs_dsp.h
+++ b/include/linux/firmware/cirrus/cs_dsp.h
@@ -167,7 +167,7 @@ struct cs_dsp {
 	const struct cs_dsp_region *mem;
 	int num_mems;
 
-	int fw_ver;
+	int wmfw_ver;
 
 	bool booted;
 	bool running;
diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index 68d2d6444533..9f8549b34e30 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -601,7 +601,7 @@ static int wm_adsp_control_add(struct cs_dsp_coeff_ctl *cs_ctl)
 		return -EINVAL;
 	}
 
-	switch (cs_dsp->fw_ver) {
+	switch (cs_dsp->wmfw_ver) {
 	case 0:
 	case 1:
 		ret = scnprintf(name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN,
-- 
2.39.2