[PATCH 6/8] wifi: ath12k: migrate firmware loading to qcom_mdt_pas_load() and qcom_pas_prepare_and_auth_reset()

[Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>]

ath12k_ahb_power_up() and ath12k_ahb_load_auth_shared_fw() call
qcom_mdt_load() for SCM-authenticated paths and then
qcom_pas_auth_and_reset() which skips the shmbridge prepare step
required before TrustZone authentication.

Replace `qcom_mdt_load()` with `devm_qcom_pas_context_alloc()` and
`qcom_mdt_pas_load()` in both call sites. In `ath12k_ahb_power_up()` the
PAS context was allocated inside the first `scm_auth_enabled` block; hoist
it to function scope so it remains visible at the authentication step in
the second `scm_auth_enabled` block, then replace
`qcom_pas_auth_and_reset()` with `qcom_pas_prepare_and_auth_reset()`.

The non-SCM-authenticated fw2 path and no-auth path retain their existing
qcom_mdt_load_no_init() calls with the persistent mem_region mapping.

Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
---
 drivers/net/wireless/ath/ath12k/ahb.c | 31 +++++++++++++++++++--------
 1 file changed, 22 insertions(+), 9 deletions(-)

diff --git a/drivers/net/wireless/ath/ath12k/ahb.c b/drivers/net/wireless/ath/ath12k/ahb.c
index 85360365aa4b..6f0ad29a83f8 100644
--- a/drivers/net/wireless/ath/ath12k/ahb.c
+++ b/drivers/net/wireless/ath/ath12k/ahb.c
@@ -391,6 +391,7 @@ static int ath12k_ahb_power_up(struct ath12k_base *ab)
 	struct ath12k_ahb_rproc_info *rproc_info = ab_ahb->rproc_info;
 	char fw_name[ATH12K_USERPD_FW_NAME_LEN];
 	char fw2_name[ATH12K_USERPD_FW_NAME_LEN];
+	struct qcom_pas_context *ctx = NULL;
 	struct device *dev = ab->dev;
 	const struct firmware *fw, *fw2;
 	unsigned long time_left;
@@ -424,14 +425,20 @@ static int ath12k_ahb_power_up(struct ath12k_base *ab)
 		ATH12K_AHB_UPD_SWID;
 
 	/* Load FW image to a reserved memory location */
-	if (ab_ahb->scm_auth_enabled)
-		ret = qcom_mdt_load(dev, fw, fw_name, pasid, rproc_info->mem_region,
-				    rproc_info->mem_phys, rproc_info->mem_size,
-				    NULL);
-	else
+	if (ab_ahb->scm_auth_enabled) {
+		ctx = devm_qcom_pas_context_alloc(dev, pasid,
+						  rproc_info->mem_phys,
+						  rproc_info->mem_size);
+		if (IS_ERR(ctx)) {
+			ret = PTR_ERR(ctx);
+			goto err_fw;
+		}
+		ret = qcom_mdt_pas_load(ctx, fw, fw_name, NULL);
+	} else {
 		ret = qcom_mdt_load_no_init(dev, fw, fw_name, rproc_info->mem_region,
 					    rproc_info->mem_phys, rproc_info->mem_size,
 					    NULL);
+	}
 	if (ret) {
 		ath12k_err(ab, "Failed to load MDT segments: %d\n", ret);
 		goto err_fw;
@@ -465,7 +472,7 @@ static int ath12k_ahb_power_up(struct ath12k_base *ab)
 
 	if (ab_ahb->scm_auth_enabled) {
 		/* Authenticate FW image using peripheral ID */
-		ret = qcom_pas_auth_and_reset(pasid);
+		ret = qcom_pas_prepare_and_auth_reset(ctx);
 		if (ret) {
 			ath12k_err(ab, "failed to boot the remote processor %d\n", ret);
 			goto err_fw2;
@@ -994,6 +1001,7 @@ static int ath12k_ahb_load_auth_shared_fw(struct ath12k_base *ab,
 					  struct ath12k_ahb_rproc_info *rproc_info,
 					  const char *fw_name, u32 pasid)
 {
+	struct qcom_pas_context *ctx;
 	int ret;
 
 	const struct firmware *fw __free(firmware) = NULL;
@@ -1012,14 +1020,19 @@ static int ath12k_ahb_load_auth_shared_fw(struct ath12k_base *ab,
 	ath12k_dbg(ab, ATH12K_DBG_AHB, "loading firmware %s, size %zd\n", fw_name,
 		   fw->size);
 
-	ret = qcom_mdt_load(ab->dev, fw, fw_name, pasid, rproc_info->mem_region,
-			    rproc_info->mem_phys, rproc_info->mem_size, NULL);
+	ctx = devm_qcom_pas_context_alloc(ab->dev, pasid,
+					  rproc_info->mem_phys,
+					  rproc_info->mem_size);
+	if (IS_ERR(ctx))
+		return PTR_ERR(ctx);
+
+	ret = qcom_mdt_pas_load(ctx, fw, fw_name, NULL);
 	if (ret) {
 		ath12k_err(ab, "failed to load RO firmware %s: %d\n", fw_name, ret);
 		return ret;
 	}
 
-	ret = qcom_pas_auth_and_reset(pasid);
+	ret = qcom_pas_prepare_and_auth_reset(ctx);
 	if (ret)
 		ath12k_err(ab, "failed to authenticate and boot shared firmware: %d\n",
 			   ret);
-- 
2.55.0