All of lore.kernel.org
 help / color / mirror / Atom feed
From: Bhaumik Bhatt <bbhatt@codeaurora.org>
To: manivannan.sadhasivam@linaro.org
Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org,
	jhugo@codeaurora.org, linux-kernel@vger.kernel.org,
	loic.poulain@linaro.org, carl.yin@quectel.com,
	naveen.kumar@quectel.com, Bhaumik Bhatt <bbhatt@codeaurora.org>
Subject: [PATCH v6 2/4] bus: mhi: core: Download AMSS image from appropriate function
Date: Wed, 24 Feb 2021 15:23:03 -0800	[thread overview]
Message-ID: <1614208985-20851-3-git-send-email-bbhatt@codeaurora.org> (raw)
In-Reply-To: <1614208985-20851-1-git-send-email-bbhatt@codeaurora.org>

During full boot chain firmware download, the PM state worker
downloads the AMSS image after a blocking wait for the SBL
execution environment change when running in PBL transition
itself. Improve this design by having the host download the AMSS
image from the SBL transition of PM state worker thread when a
DEV_ST_TRANSITION_SBL is queued instead of the blocking wait.

Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 drivers/bus/mhi/core/boot.c     | 51 +++++++++++++++++++----------------------
 drivers/bus/mhi/core/internal.h |  1 +
 drivers/bus/mhi/core/pm.c       |  2 ++
 3 files changed, 27 insertions(+), 27 deletions(-)

diff --git a/drivers/bus/mhi/core/boot.c b/drivers/bus/mhi/core/boot.c
index c2546bf..08c2874 100644
--- a/drivers/bus/mhi/core/boot.c
+++ b/drivers/bus/mhi/core/boot.c
@@ -389,7 +389,6 @@ static void mhi_firmware_copy(struct mhi_controller *mhi_cntrl,
 void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl)
 {
 	const struct firmware *firmware = NULL;
-	struct image_info *image_info;
 	struct device *dev = &mhi_cntrl->mhi_dev->dev;
 	const char *fw_name;
 	void *buf;
@@ -491,44 +490,42 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl)
 fw_load_ee_pthru:
 	/* Transitioning into MHI RESET->READY state */
 	ret = mhi_ready_state_transition(mhi_cntrl);
-
-	if (!mhi_cntrl->fbc_download)
-		return;
-
 	if (ret) {
 		dev_err(dev, "MHI did not enter READY state\n");
 		goto error_ready_state;
 	}
 
-	/* Wait for the SBL event */
-	ret = wait_event_timeout(mhi_cntrl->state_event,
-				 mhi_cntrl->ee == MHI_EE_SBL ||
-				 MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state),
-				 msecs_to_jiffies(mhi_cntrl->timeout_ms));
+	dev_info(dev, "Wait for device to enter SBL or Mission mode\n");
+	return;
 
-	if (!ret || MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
-		dev_err(dev, "MHI did not enter SBL\n");
-		goto error_ready_state;
+error_ready_state:
+	if (mhi_cntrl->fbc_download) {
+		mhi_free_bhie_table(mhi_cntrl, mhi_cntrl->fbc_image);
+		mhi_cntrl->fbc_image = NULL;
 	}
 
-	/* Start full firmware image download */
-	image_info = mhi_cntrl->fbc_image;
+error_fw_load:
+	mhi_cntrl->pm_state = MHI_PM_FW_DL_ERR;
+	wake_up_all(&mhi_cntrl->state_event);
+}
+
+int mhi_download_amss_image(struct mhi_controller *mhi_cntrl)
+{
+	struct image_info *image_info = mhi_cntrl->fbc_image;
+	struct device *dev = &mhi_cntrl->mhi_dev->dev;
+	int ret;
+
+	if (!image_info)
+		return -EIO;
+
 	ret = mhi_fw_load_bhie(mhi_cntrl,
 			       /* Vector table is the last entry */
 			       &image_info->mhi_buf[image_info->entries - 1]);
 	if (ret) {
-		dev_err(dev, "MHI did not load image over BHIe, ret: %d\n",
-			ret);
-		goto error_fw_load;
+		dev_err(dev, "MHI did not load AMSS, ret:%d\n", ret);
+		mhi_cntrl->pm_state = MHI_PM_FW_DL_ERR;
+		wake_up_all(&mhi_cntrl->state_event);
 	}
 
-	return;
-
-error_ready_state:
-	mhi_free_bhie_table(mhi_cntrl, mhi_cntrl->fbc_image);
-	mhi_cntrl->fbc_image = NULL;
-
-error_fw_load:
-	mhi_cntrl->pm_state = MHI_PM_FW_DL_ERR;
-	wake_up_all(&mhi_cntrl->state_event);
+	return ret;
 }
diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/core/internal.h
index 6f80ec3..6f37439 100644
--- a/drivers/bus/mhi/core/internal.h
+++ b/drivers/bus/mhi/core/internal.h
@@ -619,6 +619,7 @@ int mhi_pm_m3_transition(struct mhi_controller *mhi_cntrl);
 int __mhi_device_get_sync(struct mhi_controller *mhi_cntrl);
 int mhi_send_cmd(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan,
 		 enum mhi_cmd_type cmd);
+int mhi_download_amss_image(struct mhi_controller *mhi_cntrl);
 static inline bool mhi_is_active(struct mhi_controller *mhi_cntrl)
 {
 	return (mhi_cntrl->dev_state >= MHI_STATE_M0 &&
diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c
index 3bd81d0..c09ec13 100644
--- a/drivers/bus/mhi/core/pm.c
+++ b/drivers/bus/mhi/core/pm.c
@@ -758,6 +758,8 @@ void mhi_pm_st_worker(struct work_struct *work)
 			 * either SBL or AMSS states
 			 */
 			mhi_create_devices(mhi_cntrl);
+			if (mhi_cntrl->fbc_download)
+				mhi_download_amss_image(mhi_cntrl);
 			break;
 		case DEV_ST_TRANSITION_MISSION_MODE:
 			mhi_pm_mission_mode_transition(mhi_cntrl);
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


  parent reply	other threads:[~2021-02-24 23:24 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-24 23:23 [PATCH v6 0/4] Serialize execution environment changes for MHI Bhaumik Bhatt
2021-02-24 23:23 ` [PATCH v6 1/4] bus: mhi: core: Destroy SBL devices when moving to mission mode Bhaumik Bhatt
2021-02-26 22:06   ` Hemant Kumar
2021-03-04  8:41   ` Loic Poulain
2021-03-10 14:03   ` Manivannan Sadhasivam
2021-02-24 23:23 ` Bhaumik Bhatt [this message]
2021-03-04  8:42   ` [PATCH v6 2/4] bus: mhi: core: Download AMSS image from appropriate function Loic Poulain
2021-02-24 23:23 ` [PATCH v6 3/4] bus: mhi: core: Process execution environment changes serially Bhaumik Bhatt
2021-03-04  8:43   ` Loic Poulain
2021-03-10 14:04   ` Manivannan Sadhasivam
2021-08-23 18:43   ` Jeffrey Hugo
2021-08-23 19:19     ` Bhaumik Bhatt
2021-08-23 19:38       ` Jeffrey Hugo
2021-08-26 18:04         ` Bhaumik Bhatt
2021-02-24 23:23 ` [PATCH v6 4/4] bus: mhi: core: Update debug prints to include local device state Bhaumik Bhatt
2021-03-04  8:45   ` Loic Poulain
2021-03-10 14:07 ` [PATCH v6 0/4] Serialize execution environment changes for MHI Manivannan Sadhasivam
2021-05-26 19:03 ` patchwork-bot+linux-arm-msm

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1614208985-20851-3-git-send-email-bbhatt@codeaurora.org \
    --to=bbhatt@codeaurora.org \
    --cc=carl.yin@quectel.com \
    --cc=hemantk@codeaurora.org \
    --cc=jhugo@codeaurora.org \
    --cc=linux-arm-msm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=loic.poulain@linaro.org \
    --cc=manivannan.sadhasivam@linaro.org \
    --cc=naveen.kumar@quectel.com \
    --subject='Re: [PATCH v6 2/4] bus: mhi: core: Download AMSS image from appropriate function' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.