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Commit 01bec778 authored by Dan Williams's avatar Dan Williams
Browse files

isci: unify remote_device frame_handlers 



Implement all states in scic_sds_remote_device_frame() and delete
the state handler.

Reported-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent e622571f

drivers/scsi/isci/remote_device.c

+89 −176
Original line number Diff line number Diff line
@@ -277,20 +277,96 @@ enum sci_status scic_sds_remote_device_suspend(struct scic_sds_remote_device *sc 
						    suspend_type, NULL, NULL);

}



/**

 *

 * @sci_dev: The remote device for which the event handling is being

 *    requested.

 * @frame_index: This is the frame index that is being processed.

 *

 * This method invokes the frame handler for the remote device state machine

 * enum sci_status

 */

enum sci_status scic_sds_remote_device_frame_handler(

	struct scic_sds_remote_device *sci_dev,

enum sci_status scic_sds_remote_device_frame_handler(struct scic_sds_remote_device *sci_dev,

						     u32 frame_index)

{

	return sci_dev->state_handlers->frame_handler(sci_dev, frame_index);

	struct sci_base_state_machine *sm = &sci_dev->state_machine;

	enum scic_sds_remote_device_states state = sm->current_state_id;

	struct scic_sds_controller *scic = sci_dev->owning_port->owning_controller;

	enum sci_status status;



	switch (state) {

	case SCI_BASE_REMOTE_DEVICE_STATE_INITIAL:

	case SCI_BASE_REMOTE_DEVICE_STATE_STOPPED:

	case SCI_BASE_REMOTE_DEVICE_STATE_STARTING:

	case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_IDLE:

	case SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE:

	case SCI_BASE_REMOTE_DEVICE_STATE_FINAL:

	default:

		dev_warn(scirdev_to_dev(sci_dev), "%s: in wrong state: %d\n",

			 __func__, state);

		/* Return the frame back to the controller */

		scic_sds_controller_release_frame(scic, frame_index);

		return SCI_FAILURE_INVALID_STATE;

	case SCI_BASE_REMOTE_DEVICE_STATE_READY:

	case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ_ERROR:

	case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_AWAIT_RESET:

	case SCI_BASE_REMOTE_DEVICE_STATE_STOPPING:

	case SCI_BASE_REMOTE_DEVICE_STATE_FAILED:

	case SCI_BASE_REMOTE_DEVICE_STATE_RESETTING: {

		struct scic_sds_request *sci_req;

		struct sci_ssp_frame_header *hdr;



		status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,

								       frame_index,

								       (void **)&hdr);

		if (status != SCI_SUCCESS)

			return status;



		sci_req = scic_sds_controller_get_io_request_from_tag(scic, hdr->tag);

		if (sci_req && sci_req->target_device == sci_dev) {

			/* The IO request is now in charge of releasing the frame */

			status = sci_req->state_handlers->frame_handler(sci_req,

									frame_index);

		} else {

			/* We could not map this tag to a valid IO

			 * request Just toss the frame and continue

			 */

			scic_sds_controller_release_frame(scic, frame_index);

		}

		break;

	}

	case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ: {

		struct sata_fis_header *hdr;



		status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,

								       frame_index,

								       (void **)&hdr);

		if (status != SCI_SUCCESS)

			return status;



		if (hdr->fis_type == SATA_FIS_TYPE_SETDEVBITS &&

		    (hdr->status & ATA_STATUS_REG_ERROR_BIT)) {

			sci_dev->not_ready_reason = SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED;



			/* TODO Check sactive and complete associated IO if any. */

			sci_base_state_machine_change_state(sm, SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ_ERROR);

		} else if (hdr->fis_type == SATA_FIS_TYPE_REGD2H &&

			   (hdr->status & ATA_STATUS_REG_ERROR_BIT)) {

			/*

			 * Some devices return D2H FIS when an NCQ error is detected.

			 * Treat this like an SDB error FIS ready reason.

			 */

			sci_dev->not_ready_reason = SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED;

			sci_base_state_machine_change_state(&sci_dev->state_machine,

							    SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ_ERROR);

		} else

			status = SCI_FAILURE;



		scic_sds_controller_release_frame(scic, frame_index);

		break;

	}

	case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_CMD:

	case SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_CMD:

		/* The device does not process any UF received from the hardware while

		 * in this state.  All unsolicited frames are forwarded to the io request

		 * object.

		 */

		status = scic_sds_io_request_frame_handler(sci_dev->working_request, frame_index);

		break;

	}



	return status;

}



static bool is_remote_device_ready(struct scic_sds_remote_device *sci_dev)
@@ -720,136 +796,6 @@ static void remote_device_resume_done(void *_dev) 
					    SCI_BASE_REMOTE_DEVICE_STATE_READY);

}



/**

 *

 * @device: The struct scic_sds_remote_device which is then cast into a

 *    struct scic_sds_remote_device.

 * @frame_index: The frame index for which the struct scic_sds_controller wants this

 *    device object to process.

 *

 * This method is the default unsolicited frame handler.  It logs a warning,

 * releases the frame and returns a failure. enum sci_status

 * SCI_FAILURE_INVALID_STATE

 */

static enum sci_status scic_sds_remote_device_default_frame_handler(

	struct scic_sds_remote_device *sci_dev,

	u32 frame_index)

{

	dev_warn(scirdev_to_dev(sci_dev),

		 "%s: SCIC Remote Device requested to handle frame %x "

		 "while in wrong state %d\n",

		 __func__,

		 frame_index,

		 sci_base_state_machine_get_state(

			 &sci_dev->state_machine));



	/* Return the frame back to the controller */

	scic_sds_controller_release_frame(

		scic_sds_remote_device_get_controller(sci_dev), frame_index

		);



	return SCI_FAILURE_INVALID_STATE;

}



/**

 *

 * @device: The struct scic_sds_remote_device which is then cast into a

 *    struct scic_sds_remote_device.

 * @frame_index: The frame index for which the struct scic_sds_controller wants this

 *    device object to process.

 *

 * This method is a general ssp frame handler.  In most cases the device object

 * needs to route the unsolicited frame processing to the io request object.

 * This method decodes the tag for the io request object and routes the

 * unsolicited frame to that object. enum sci_status SCI_FAILURE_INVALID_STATE

 */

static enum sci_status scic_sds_remote_device_general_frame_handler(

	struct scic_sds_remote_device *sci_dev,

	u32 frame_index)

{

	enum sci_status result;

	struct sci_ssp_frame_header *frame_header;

	struct scic_sds_request *io_request;



	result = scic_sds_unsolicited_frame_control_get_header(

		&(scic_sds_remote_device_get_controller(sci_dev)->uf_control),

		frame_index,

		(void **)&frame_header

		);



	if (SCI_SUCCESS == result) {

		io_request = scic_sds_controller_get_io_request_from_tag(

			scic_sds_remote_device_get_controller(sci_dev), frame_header->tag);



		if ((io_request == NULL)

		    || (io_request->target_device != sci_dev)) {

			/*

			 * We could not map this tag to a valid IO request

			 * Just toss the frame and continue */

			scic_sds_controller_release_frame(

				scic_sds_remote_device_get_controller(sci_dev), frame_index

				);

		} else {

			/* The IO request is now in charge of releasing the frame */

			result = io_request->state_handlers->frame_handler(

				io_request, frame_index);

		}

	}



	return result;

}



static enum sci_status scic_sds_stp_remote_device_ready_ncq_substate_frame_handler(struct scic_sds_remote_device *sci_dev,

										   u32 frame_index)

{

	enum sci_status status;

	struct sata_fis_header *frame_header;

	struct scic_sds_controller *scic = sci_dev->owning_port->owning_controller;



	status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,

							       frame_index,

							       (void **)&frame_header);

	if (status != SCI_SUCCESS)

		return status;



	if (frame_header->fis_type == SATA_FIS_TYPE_SETDEVBITS &&

	    (frame_header->status & ATA_STATUS_REG_ERROR_BIT)) {

		sci_dev->not_ready_reason = SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED;



		/* TODO Check sactive and complete associated IO if any. */



		sci_base_state_machine_change_state(&sci_dev->state_machine,

						    SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ_ERROR);

	} else if (frame_header->fis_type == SATA_FIS_TYPE_REGD2H &&

		   (frame_header->status & ATA_STATUS_REG_ERROR_BIT)) {

		/*

		 * Some devices return D2H FIS when an NCQ error is detected.

		 * Treat this like an SDB error FIS ready reason.

		 */

		sci_dev->not_ready_reason = SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED;



		sci_base_state_machine_change_state(&sci_dev->state_machine,

						    SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ_ERROR);

	} else

		status = SCI_FAILURE;



	scic_sds_controller_release_frame(scic, frame_index);



	return status;

}



static enum sci_status scic_sds_stp_remote_device_ready_cmd_substate_frame_handler(

	struct scic_sds_remote_device *sci_dev,

	u32 frame_index)

{

	/* The device doe not process any UF received from the hardware while

	 * in this state.  All unsolicited frames are forwarded to the io

	 * request object.

	 */

	return scic_sds_io_request_frame_handler(sci_dev->working_request,

						 frame_index);

}



static void scic_sds_stp_remote_device_ready_idle_substate_resume_complete_handler(void *_dev)

{

	struct scic_sds_remote_device *sci_dev = _dev;
@@ -863,69 +809,36 @@ static void scic_sds_stp_remote_device_ready_idle_substate_resume_complete_handl 
		isci_remote_device_ready(scic->ihost, idev);

}



static enum sci_status scic_sds_smp_remote_device_ready_cmd_substate_frame_handler(

	struct scic_sds_remote_device *sci_dev,

	u32 frame_index)

{

	enum sci_status status;



	/* The device does not process any UF received from the hardware while

	 * in this state.  All unsolicited frames are forwarded to the io request

	 * object.

	 */

	status = scic_sds_io_request_frame_handler(

		sci_dev->working_request,

		frame_index

		);



	return status;

}



static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_state_handler_table[] = {

	[SCI_BASE_REMOTE_DEVICE_STATE_INITIAL] = {

		.frame_handler		= scic_sds_remote_device_default_frame_handler

	},

	[SCI_BASE_REMOTE_DEVICE_STATE_STOPPED] = {

		.frame_handler		= scic_sds_remote_device_default_frame_handler

	},

	[SCI_BASE_REMOTE_DEVICE_STATE_STARTING] = {

		.frame_handler		= scic_sds_remote_device_default_frame_handler

	},

	[SCI_BASE_REMOTE_DEVICE_STATE_READY] = {

		.frame_handler		= scic_sds_remote_device_general_frame_handler,

	},

	[SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_IDLE] = {

		.frame_handler			= scic_sds_remote_device_default_frame_handler

	},

	[SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_CMD] = {

		.frame_handler			= scic_sds_stp_remote_device_ready_cmd_substate_frame_handler

	},

	[SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ] = {

		.frame_handler			= scic_sds_stp_remote_device_ready_ncq_substate_frame_handler

	},

	[SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ_ERROR] = {

		.frame_handler			= scic_sds_remote_device_general_frame_handler

	},

	[SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_AWAIT_RESET] = {

		.frame_handler			= scic_sds_remote_device_general_frame_handler

	},

	[SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE] = {

		.frame_handler		= scic_sds_remote_device_default_frame_handler

	},

	[SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_CMD] = {

		.frame_handler		= scic_sds_smp_remote_device_ready_cmd_substate_frame_handler

	},

	[SCI_BASE_REMOTE_DEVICE_STATE_STOPPING] = {

		.frame_handler		= scic_sds_remote_device_general_frame_handler

	},

	[SCI_BASE_REMOTE_DEVICE_STATE_FAILED] = {

		.frame_handler		= scic_sds_remote_device_general_frame_handler

	},

	[SCI_BASE_REMOTE_DEVICE_STATE_RESETTING] = {

		.frame_handler		= scic_sds_remote_device_general_frame_handler

	},

	[SCI_BASE_REMOTE_DEVICE_STATE_FINAL] = {

		.frame_handler		= scic_sds_remote_device_default_frame_handler

	}

};

drivers/scsi/isci/remote_device.h

+0 −1
Original line number Diff line number Diff line
@@ -386,7 +386,6 @@ typedef void (*scic_sds_remote_device_ready_not_ready_handler_t)( 
 *

 */

struct scic_sds_remote_device_state_handler {

	scic_sds_remote_device_frame_handler_t frame_handler;

};



/**