linux-kernel - [RESEND: PATCH v4 2/4] remoteproc: qcom: refactor mss fw image loading sequence

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Date:   Tue, 16 May 2017 23:32:00 +0530
From:   Avaneesh Kumar Dwivedi <akdwived@...eaurora.org>
To:     bjorn.andersson@...aro.org
Cc:     sboyd@...eaurora.org, agross@...eaurora.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-remoteproc@...r.kernel.org,
        Avaneesh Kumar Dwivedi <akdwived@...eaurora.org>
Subject: [RESEND: PATCH v4 2/4] remoteproc: qcom: refactor mss fw image loading sequence

This patch refactor code to first load all firmware blobs
and then update modem proc to authenticate and boot fw.
Also make a trivial change in a error log.

Signed-off-by: Avaneesh Kumar Dwivedi <akdwived@...eaurora.org>
---
 drivers/remoteproc/qcom_q6v5_pil.c | 25 ++++++++++++-------------
 1 file changed, 12 insertions(+), 13 deletions(-)

diff --git a/drivers/remoteproc/qcom_q6v5_pil.c b/drivers/remoteproc/qcom_q6v5_pil.c
index 8fd697a..2626954 100644
--- a/drivers/remoteproc/qcom_q6v5_pil.c
+++ b/drivers/remoteproc/qcom_q6v5_pil.c
@@ -466,9 +466,10 @@ static int q6v5_mpss_init_image(struct q6v5 *qproc, const struct firmware *fw)
 
 	ret = q6v5_rmb_mba_wait(qproc, RMB_MBA_META_DATA_AUTH_SUCCESS, 1000);
 	if (ret == -ETIMEDOUT)
-		dev_err(qproc->dev, "MPSS header authentication timed out\n");
+		dev_err(qproc->dev, "metadata authentication timed out\n");
 	else if (ret < 0)
-		dev_err(qproc->dev, "MPSS header authentication failed: %d\n", ret);
+		dev_err(qproc->dev,
+			"metadata authentication failed: %d\n", ret);
 
 	dma_free_attrs(qproc->dev, fw->size, ptr, phys, dma_attrs);
 
@@ -503,7 +504,7 @@ static int q6v5_mpss_load(struct q6v5 *qproc)
 	bool relocate = false;
 	char seg_name[10];
 	ssize_t offset;
-	size_t size;
+	size_t size = 0;
 	void *ptr;
 	int ret;
 	int i;
@@ -541,7 +542,9 @@ static int q6v5_mpss_load(struct q6v5 *qproc)
 	}
 
 	mpss_reloc = relocate ? min_addr : qproc->mpss_phys;
-
+	/* Load firmware completely before letting mss to start
+	 * authentication and then boot firmware
+	 */
 	for (i = 0; i < ehdr->e_phnum; i++) {
 		phdr = &phdrs[i];
 
@@ -574,17 +577,13 @@ static int q6v5_mpss_load(struct q6v5 *qproc)
 			memset(ptr + phdr->p_filesz, 0,
 			       phdr->p_memsz - phdr->p_filesz);
 		}
-
-		size = readl(qproc->rmb_base + RMB_PMI_CODE_LENGTH_REG);
-		if (!size) {
-			boot_addr = relocate ? qproc->mpss_phys : min_addr;
-			writel(boot_addr, qproc->rmb_base + RMB_PMI_CODE_START_REG);
-			writel(RMB_CMD_LOAD_READY, qproc->rmb_base + RMB_MBA_COMMAND_REG);
-		}
-
 		size += phdr->p_memsz;
-		writel(size, qproc->rmb_base + RMB_PMI_CODE_LENGTH_REG);
 	}
+	/* Transfer ownership of modem region with modem fw */
+	boot_addr = relocate ? qproc->mpss_phys : min_addr;
+	writel(boot_addr, qproc->rmb_base + RMB_PMI_CODE_START_REG);
+	writel(RMB_CMD_LOAD_READY, qproc->rmb_base + RMB_MBA_COMMAND_REG);
+	writel(size, qproc->rmb_base + RMB_PMI_CODE_LENGTH_REG);
 
 	ret = q6v5_rmb_mba_wait(qproc, RMB_MBA_AUTH_COMPLETE, 10000);
 	if (ret == -ETIMEDOUT)
-- 
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