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Commit 5e803bd9 authored by Bhaumik Bhatt's avatar Bhaumik Bhatt
Browse files

mhi: cntrl: qcom: Add support for fatal error processing 



MHI controller needs to handle the fatal error callback issued by the
bus in case reset separation needs to be supported. This state will
occur as a SYS ERROR state with the device being in PBL. Perform a
full power cycle and issue an MHI RESET during power down.

Change-Id: I467943924302ba773c8f6d0c4ad09b51faaeb490
Signed-off-by: default avatarBhaumik Bhatt <bbhatt@codeaurora.org>
parent b101ff3a

drivers/bus/mhi/controllers/mhi_qcom.c

+21 −0
Original line number Diff line number Diff line
@@ -525,6 +525,22 @@ static int mhi_qcom_power_up(struct mhi_controller *mhi_cntrl) 
	return ret;

}



static void mhi_qcom_fatal_worker(struct work_struct *work)

{

	struct mhi_dev *mhi_dev = container_of(work, struct mhi_dev,

					       fatal_worker);

	struct device *dev = &mhi_dev->pci_dev->dev;

	struct mhi_controller *mhi_cntrl = dev_get_drvdata(dev);

	int ret;



	mhi_power_down(mhi_cntrl, true);



	ret = mhi_qcom_power_up(mhi_cntrl);

	if (ret)

		MHI_ERR("Power up failure after SYS ERROR in PBL, ret:%d\n",

			ret);

}



static int mhi_runtime_get(struct mhi_controller *mhi_cntrl, void *priv)

{

	struct mhi_dev *mhi_dev = priv;
@@ -569,6 +585,10 @@ static void mhi_status_cb(struct mhi_controller *mhi_cntrl, 
		pm_runtime_put(dev);

		mhi_arch_mission_mode_enter(mhi_cntrl);

		break;

	case MHI_CB_FATAL_ERROR:

		MHI_CNTRL_ERR("Perform power cycle due to SYS ERROR in PBL\n");

		schedule_work(&mhi_dev->fatal_worker);

		break;

	default:

		MHI_CNTRL_LOG("Unhandled cb:0x%x\n", reason);

	}
@@ -782,6 +802,7 @@ static struct mhi_controller *mhi_register_controller(struct pci_dev *pci_dev) 
		goto error_register;



	INIT_WORK(&mhi_cntrl->reg_write_work, mhi_reg_write_work);

	INIT_WORK(&mhi_dev->fatal_worker, mhi_qcom_fatal_worker);



	mhi_cntrl->reg_write_q = kcalloc(REG_WRITE_QUEUE_LEN,

					sizeof(*mhi_cntrl->reg_write_q),

drivers/bus/mhi/controllers/mhi_qcom.h

+1 −0
Original line number Diff line number Diff line
@@ -63,6 +63,7 @@ struct mhi_dev { 
	dma_addr_t iova_start;

	dma_addr_t iova_stop;

	enum mhi_suspend_mode suspend_mode;

	struct work_struct fatal_worker;



	/* hardware info */

	u32 serial_num;