[PATCH 5/8] net: ipa: migrate firmware loading to qcom_mdt_pas_load() and qcom_pas_prepare_and_auth_reset()

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

ipa_firmware_load() calls qcom_mdt_load() which bundles metadata init,
memory setup, and segment loading with no PAS context, then calls
qcom_pas_auth_and_reset() which skips the shmbridge prepare step required
before TrustZone authentication.

Replace the open-coded memremap()/qcom_mdt_load()/memunmap() sequence
with devm_qcom_pas_context_alloc() and qcom_mdt_pas_load(), then pass
the same context to qcom_pas_prepare_and_auth_reset().

Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
---
 drivers/net/ipa/ipa_main.c | 24 +++++++++++-------------
 1 file changed, 11 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c
index 14ac2d2faf7c..6964395caedd 100644
--- a/drivers/net/ipa/ipa_main.c
+++ b/drivers/net/ipa/ipa_main.c
@@ -585,12 +585,11 @@ static void ipa_deconfig(struct ipa *ipa)
 
 static int ipa_firmware_load(struct device *dev)
 {
+	struct qcom_pas_context *ctx;
 	const struct firmware *fw;
 	struct resource res;
 	phys_addr_t phys;
 	const char *path;
-	ssize_t size;
-	void *virt;
 	int ret;
 
 	ret = of_reserved_mem_region_to_resource(dev->of_node, 0, &res);
@@ -615,24 +614,23 @@ static int ipa_firmware_load(struct device *dev)
 	}
 
 	phys = res.start;
-	size = (size_t)resource_size(&res);
-	virt = memremap(phys, size, MEMREMAP_WC);
-	if (!virt) {
-		dev_err(dev, "unable to remap firmware memory\n");
-		ret = -ENOMEM;
+	ctx = devm_qcom_pas_context_alloc(dev, IPA_PAS_ID, phys,
+					  resource_size(&res));
+	if (IS_ERR(ctx)) {
+		ret = PTR_ERR(ctx);
 		goto out_release_firmware;
 	}
 
-	ret = qcom_mdt_load(dev, fw, path, IPA_PAS_ID, virt, phys, size, NULL);
+	ret = qcom_mdt_pas_load(ctx, fw, path, NULL);
 	if (ret) {
 		dev_err(dev, "error %d loading \"%s\"\n", ret, path);
-	} else {
-		ret = qcom_pas_auth_and_reset(IPA_PAS_ID);
-		if (ret)
-			dev_err(dev, "error %d authenticating \"%s\"\n", ret, path);
+		goto out_release_firmware;
 	}
 
-	memunmap(virt);
+	ret = qcom_pas_prepare_and_auth_reset(ctx);
+	if (ret)
+		dev_err(dev, "error %d authenticating \"%s\"\n", ret, path);
+
 out_release_firmware:
 	release_firmware(fw);
 
-- 
2.55.0