firmware: cs_dsp: Add version checks on coefficient loading

The firmware coefficient files contain version information that is
currently ignored by the cs_dsp code. This information specifies which
version of the firmware the coefficient were generated for. Add a check
into the code which prints a warning in the case the coefficient and
firmware differ in version, in many cases this will be ok but it is not
always, so best to let the user know there is a potential issue.

Co-authored-by: Simon Trimmer <simont@opensource.cirrus.com>
Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20211117132300.1290-3-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

2 files changed, 38 insertions, 13 deletions

diff --git a/drivers/firmware/cirrus/cs_dsp.c b/drivers/firmware/cirrus/cs_dsp.c
index 0d1ba7d8efa4..0da454a8498d 100644
--- a/drivers/firmware/cirrus/cs_dsp.c
+++ b/drivers/firmware/cirrus/cs_dsp.c
@@ -1569,7 +1569,7 @@ EXPORT_SYMBOL_GPL(cs_dsp_find_alg_region);
 
 static struct cs_dsp_alg_region *cs_dsp_create_region(struct cs_dsp *dsp,
 						      int type, __be32 id,
-						      __be32 base)
+						      __be32 ver, __be32 base)
 {
 	struct cs_dsp_alg_region *alg_region;
 
@@ -1579,6 +1579,7 @@ static struct cs_dsp_alg_region *cs_dsp_create_region(struct cs_dsp *dsp,
 
 	alg_region->type = type;
 	alg_region->alg = be32_to_cpu(id);
+	alg_region->ver = be32_to_cpu(ver);
 	alg_region->base = be32_to_cpu(base);
 
 	list_add_tail(&alg_region->list, &dsp->alg_regions);
@@ -1628,14 +1629,14 @@ static void cs_dsp_parse_wmfw_v3_id_header(struct cs_dsp *dsp,
 		    nalgs);
 }
 
-static int cs_dsp_create_regions(struct cs_dsp *dsp, __be32 id, int nregions,
-				 const int *type, __be32 *base)
+static int cs_dsp_create_regions(struct cs_dsp *dsp, __be32 id, __be32 ver,
+				 int nregions, const int *type, __be32 *base)
 {
 	struct cs_dsp_alg_region *alg_region;
 	int i;
 
 	for (i = 0; i < nregions; i++) {
-		alg_region = cs_dsp_create_region(dsp, type[i], id, base[i]);
+		alg_region = cs_dsp_create_region(dsp, type[i], id, ver, base[i]);
 		if (IS_ERR(alg_region))
 			return PTR_ERR(alg_region);
 	}
@@ -1670,12 +1671,14 @@ static int cs_dsp_adsp1_setup_algs(struct cs_dsp *dsp)
 	cs_dsp_parse_wmfw_id_header(dsp, &adsp1_id.fw, n_algs);
 
 	alg_region = cs_dsp_create_region(dsp, WMFW_ADSP1_ZM,
-					  adsp1_id.fw.id, adsp1_id.zm);
+					  adsp1_id.fw.id, adsp1_id.fw.ver,
+					  adsp1_id.zm);
 	if (IS_ERR(alg_region))
 		return PTR_ERR(alg_region);
 
 	alg_region = cs_dsp_create_region(dsp, WMFW_ADSP1_DM,
-					  adsp1_id.fw.id, adsp1_id.dm);
+					  adsp1_id.fw.id, adsp1_id.fw.ver,
+					  adsp1_id.dm);
 	if (IS_ERR(alg_region))
 		return PTR_ERR(alg_region);
 
@@ -1698,6 +1701,7 @@ static int cs_dsp_adsp1_setup_algs(struct cs_dsp *dsp)
 
 		alg_region = cs_dsp_create_region(dsp, WMFW_ADSP1_DM,
 						  adsp1_alg[i].alg.id,
+						  adsp1_alg[i].alg.ver,
 						  adsp1_alg[i].dm);
 		if (IS_ERR(alg_region)) {
 			ret = PTR_ERR(alg_region);
@@ -1719,6 +1723,7 @@ static int cs_dsp_adsp1_setup_algs(struct cs_dsp *dsp)
 
 		alg_region = cs_dsp_create_region(dsp, WMFW_ADSP1_ZM,
 						  adsp1_alg[i].alg.id,
+						  adsp1_alg[i].alg.ver,
 						  adsp1_alg[i].zm);
 		if (IS_ERR(alg_region)) {
 			ret = PTR_ERR(alg_region);
@@ -1771,17 +1776,20 @@ static int cs_dsp_adsp2_setup_algs(struct cs_dsp *dsp)
 	cs_dsp_parse_wmfw_id_header(dsp, &adsp2_id.fw, n_algs);
 
 	alg_region = cs_dsp_create_region(dsp, WMFW_ADSP2_XM,
-					  adsp2_id.fw.id, adsp2_id.xm);
+					  adsp2_id.fw.id, adsp2_id.fw.ver,
+					  adsp2_id.xm);
 	if (IS_ERR(alg_region))
 		return PTR_ERR(alg_region);
 
 	alg_region = cs_dsp_create_region(dsp, WMFW_ADSP2_YM,
-					  adsp2_id.fw.id, adsp2_id.ym);
+					  adsp2_id.fw.id, adsp2_id.fw.ver,
+					  adsp2_id.ym);
 	if (IS_ERR(alg_region))
 		return PTR_ERR(alg_region);
 
 	alg_region = cs_dsp_create_region(dsp, WMFW_ADSP2_ZM,
-					  adsp2_id.fw.id, adsp2_id.zm);
+					  adsp2_id.fw.id, adsp2_id.fw.ver,
+					  adsp2_id.zm);
 	if (IS_ERR(alg_region))
 		return PTR_ERR(alg_region);
 
@@ -1806,6 +1814,7 @@ static int cs_dsp_adsp2_setup_algs(struct cs_dsp *dsp)
 
 		alg_region = cs_dsp_create_region(dsp, WMFW_ADSP2_XM,
 						  adsp2_alg[i].alg.id,
+						  adsp2_alg[i].alg.ver,
 						  adsp2_alg[i].xm);
 		if (IS_ERR(alg_region)) {
 			ret = PTR_ERR(alg_region);
@@ -1827,6 +1836,7 @@ static int cs_dsp_adsp2_setup_algs(struct cs_dsp *dsp)
 
 		alg_region = cs_dsp_create_region(dsp, WMFW_ADSP2_YM,
 						  adsp2_alg[i].alg.id,
+						  adsp2_alg[i].alg.ver,
 						  adsp2_alg[i].ym);
 		if (IS_ERR(alg_region)) {
 			ret = PTR_ERR(alg_region);
@@ -1848,6 +1858,7 @@ static int cs_dsp_adsp2_setup_algs(struct cs_dsp *dsp)
 
 		alg_region = cs_dsp_create_region(dsp, WMFW_ADSP2_ZM,
 						  adsp2_alg[i].alg.id,
+						  adsp2_alg[i].alg.ver,
 						  adsp2_alg[i].zm);
 		if (IS_ERR(alg_region)) {
 			ret = PTR_ERR(alg_region);
@@ -1873,7 +1884,7 @@ out:
 	return ret;
 }
 
-static int cs_dsp_halo_create_regions(struct cs_dsp *dsp, __be32 id,
+static int cs_dsp_halo_create_regions(struct cs_dsp *dsp, __be32 id, __be32 ver,
 				      __be32 xm_base, __be32 ym_base)
 {
 	static const int types[] = {
@@ -1882,7 +1893,7 @@ static int cs_dsp_halo_create_regions(struct cs_dsp *dsp, __be32 id,
 	};
 	__be32 bases[] = { xm_base, xm_base, ym_base, ym_base };
 
-	return cs_dsp_create_regions(dsp, id, ARRAY_SIZE(types), types, bases);
+	return cs_dsp_create_regions(dsp, id, ver, ARRAY_SIZE(types), types, bases);
 }
 
 static int cs_dsp_halo_setup_algs(struct cs_dsp *dsp)
@@ -1910,7 +1921,7 @@ static int cs_dsp_halo_setup_algs(struct cs_dsp *dsp)
 
 	cs_dsp_parse_wmfw_v3_id_header(dsp, &halo_id.fw, n_algs);
 
-	ret = cs_dsp_halo_create_regions(dsp, halo_id.fw.id,
+	ret = cs_dsp_halo_create_regions(dsp, halo_id.fw.id, halo_id.fw.ver,
 					 halo_id.xm_base, halo_id.ym_base);
 	if (ret)
 		return ret;
@@ -1934,6 +1945,7 @@ static int cs_dsp_halo_setup_algs(struct cs_dsp *dsp)
 			    be32_to_cpu(halo_alg[i].ym_base));
 
 		ret = cs_dsp_halo_create_regions(dsp, halo_alg[i].alg.id,
+						 halo_alg[i].alg.ver,
 						 halo_alg[i].xm_base,
 						 halo_alg[i].ym_base);
 		if (ret)
@@ -1955,7 +1967,7 @@ static int cs_dsp_load_coeff(struct cs_dsp *dsp, const struct firmware *firmware
 	const struct cs_dsp_region *mem;
 	struct cs_dsp_alg_region *alg_region;
 	const char *region_name;
-	int ret, pos, blocks, type, offset, reg;
+	int ret, pos, blocks, type, offset, reg, version;
 	struct cs_dsp_buf *buf;
 
 	if (!firmware)
@@ -1999,6 +2011,7 @@ static int cs_dsp_load_coeff(struct cs_dsp *dsp, const struct firmware *firmware
 
 		type = le16_to_cpu(blk->type);
 		offset = le16_to_cpu(blk->offset);
+		version = le32_to_cpu(blk->ver) >> 8;
 
 		cs_dsp_dbg(dsp, "%s.%d: %x v%d.%d.%d\n",
 			   file, blocks, le32_to_cpu(blk->id),
@@ -2056,6 +2069,16 @@ static int cs_dsp_load_coeff(struct cs_dsp *dsp, const struct firmware *firmware
 			alg_region = cs_dsp_find_alg_region(dsp, type,
 							    le32_to_cpu(blk->id));
 			if (alg_region) {
+				if (version != alg_region->ver)
+					cs_dsp_warn(dsp,
+						    "Algorithm coefficient version %d.%d.%d but expected %d.%d.%d\n",
+						   (version >> 16) & 0xFF,
+						   (version >> 8) & 0xFF,
+						   version & 0xFF,
+						   (alg_region->ver >> 16) & 0xFF,
+						   (alg_region->ver >> 8) & 0xFF,
+						   alg_region->ver & 0xFF);
+
 				reg = alg_region->base;
 				reg = dsp->ops->region_to_reg(mem, reg);
 				reg += offset;
diff --git a/include/linux/firmware/cirrus/cs_dsp.h b/include/linux/firmware/cirrus/cs_dsp.h
index 3a54b1afc48f..ce54705e2bec 100644
--- a/include/linux/firmware/cirrus/cs_dsp.h
+++ b/include/linux/firmware/cirrus/cs_dsp.h
@@ -54,12 +54,14 @@ struct cs_dsp_region {
  * struct cs_dsp_alg_region - Describes a logical algorithm region in DSP address space
  * @list:	List node for internal use
  * @alg:	Algorithm id
+ * @ver:	Expected algorithm version
  * @type:	Memory region type
  * @base:	Address of region
  */
 struct cs_dsp_alg_region {
 	struct list_head list;
 	unsigned int alg;
+	unsigned int ver;
 	int type;
 	unsigned int base;
 };