v6:
-Add patch to improve debug message
-Fix switch-case fall through warning for EE serialization patch
-Address review comments and update commit text
v5:
-Update commit text for "clear devices when moving execution environments" patch
-Added test platform details that were missed out in the cover letter
-Merged two if checks in to a single one for EE serialization patch
v4:
-Addressed review comments for additional info logging for EE movements
-Updated switch case for EE handling in mhi_intvec_threaded_handler()
v3:
-Update commit text to accurately reflect changes and reasoning based on reviews
v2:
-Add patch to clear devices when moving execution environments
Note: This patch is first in series of execution environment related changes.
During full boot chain firmware download, the PM state worker downloads the AMSS
image after waiting for the SBL execution environment change in PBL mode itself.
Since getting rid of the firmware load worker thread, this design needs to
change and MHI host must download the AMSS image from the SBL mode of PM state
worker thread instead of blocking waits for SBL EE in PBL transition processing.
Ensure that EE changes are handled only from appropriate places and occur
one after another and handle only PBL or RDDM EE changes as critical events
directly from the interrupt handler and the status callback is given to the
controller drivers promptly.
When moving from SBL to AMSS EE, clear SBL specific client devices by calling
remove callbacks for them so they are not left opened in a different execution
environment.
This patchset was tested on ARM64.
Bhaumik Bhatt (4):
bus: mhi: core: Destroy SBL devices when moving to mission mode
bus: mhi: core: Download AMSS image from appropriate function
bus: mhi: core: Process execution environment changes serially
bus: mhi: core: Update debug prints to include local device state
drivers/bus/mhi/core/boot.c | 51 +++++++++++++--------------
drivers/bus/mhi/core/internal.h | 1 +
drivers/bus/mhi/core/main.c | 76 +++++++++++++++++++++++++++--------------
drivers/bus/mhi/core/pm.c | 10 ++++--
4 files changed, 83 insertions(+), 55 deletions(-)
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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 <[email protected]>
Reviewed-by: Manivannan Sadhasivam <[email protected]>
---
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
On Thu, 25 Feb 2021 at 00:23, Bhaumik Bhatt <[email protected]> wrote:
>
> 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 <[email protected]>
> Reviewed-by: Manivannan Sadhasivam <[email protected]>
Reviewed-by: Loic Poulain <[email protected]>