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isci: merge smp request substates into primary state machine 

Remove usage of the request substate machine for smp requests identified by:
	task->task_proto == SAS_PROTOCOL_SMP

While merging over the smp_request infrastructure noticed that all the
assign buffer implementations are now equal, so moved it to
scic_sds_general_request_construct.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2011-05-10 02:28:48 -07:00
Родитель f139303d17
Коммит c72086e3c2
5 изменённых файлов: 436 добавлений и 593 удалений
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1
drivers/scsi/isci/Makefile
Просмотреть файл

@ -7,5 +7,4 @@ isci-objs := init.o phy.o request.o sata.o \
remote_node_table.o \
unsolicited_frame_control.o \
stp_request.o \
smp_request.o \
port_config.o \

458
drivers/scsi/isci/request.c
Просмотреть файл

@ -158,12 +158,6 @@ void scic_sds_request_build_sgl(struct scic_sds_request *sds_request)
}
}
static void scic_sds_ssp_io_request_assign_buffers(struct scic_sds_request *sci_req)
{
if (sci_req->was_tag_assigned_by_user == false)
sci_req->task_context_buffer = &sci_req->tc;
}
static void scic_sds_io_request_build_ssp_command_iu(struct scic_sds_request *sci_req)
{
struct ssp_cmd_iu *cmd_iu;
@ -341,12 +335,6 @@ static void scu_ssp_io_request_construct_task_context(
scic_sds_request_build_sgl(sci_req);
}
static void scic_sds_ssp_task_request_assign_buffers(struct scic_sds_request *sci_req)
{
if (sci_req->was_tag_assigned_by_user == false)
sci_req->task_context_buffer = &sci_req->tc;
}
/**
* This method will fill in the SCU Task Context for a SSP Task request. The
* following important settings are utilized: -# priority ==
@ -1261,6 +1249,196 @@ static enum sci_status scic_sds_ssp_task_request_await_tc_response_frame_handler
return SCI_SUCCESS;
}
/**
* This method processes an abnormal TC completion while the SMP request is
* waiting for a response frame. It decides what happened to the IO based
* on TC completion status.
* @sci_req: This parameter specifies the request for which the TC
* completion was received.
* @completion_code: This parameter indicates the completion status information
* for the TC.
*
* Indicate if the tc completion handler was successful. SCI_SUCCESS currently
* this method always returns success.
*/
static enum sci_status scic_sds_smp_request_await_response_tc_completion_handler(
struct scic_sds_request *sci_req,
u32 completion_code)
{
switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
/*
* In the AWAIT RESPONSE state, any TC completion is unexpected.
* but if the TC has success status, we complete the IO anyway. */
scic_sds_request_set_status(
sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS
);
sci_base_state_machine_change_state(
&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
break;
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_RESP_TO_ERR):
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_UFI_ERR):
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_FRM_TYPE_ERR):
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_LL_RX_ERR):
/*
* These status has been seen in a specific LSI expander, which sometimes
* is not able to send smp response within 2 ms. This causes our hardware
* break the connection and set TC completion with one of these SMP_XXX_XX_ERR
* status. For these type of error, we ask scic user to retry the request. */
scic_sds_request_set_status(
sci_req, SCU_TASK_DONE_SMP_RESP_TO_ERR, SCI_FAILURE_RETRY_REQUIRED
);
sci_base_state_machine_change_state(
&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
break;
default:
/*
* All other completion status cause the IO to be complete. If a NAK
* was received, then it is up to the user to retry the request. */
scic_sds_request_set_status(
sci_req,
SCU_NORMALIZE_COMPLETION_STATUS(completion_code),
SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR
);
sci_base_state_machine_change_state(
&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
break;
}
return SCI_SUCCESS;
}
/*
* This function processes an unsolicited frame while the SMP request is waiting
* for a response frame. It will copy the response data, release the
* unsolicited frame, and transition the request to the
* SCI_BASE_REQUEST_STATE_COMPLETED state.
* @sci_req: This parameter specifies the request for which the
* unsolicited frame was received.
* @frame_index: This parameter indicates the unsolicited frame index that
* should contain the response.
*
* This function returns an indication of whether the response frame was handled
* successfully or not. SCI_SUCCESS Currently this value is always returned and
* indicates successful processing of the TC response.
*/
static enum sci_status
scic_sds_smp_request_await_response_frame_handler(struct scic_sds_request *sci_req,
u32 frame_index)
{
enum sci_status status;
void *frame_header;
struct smp_resp *rsp_hdr = &sci_req->smp.rsp;
ssize_t word_cnt = SMP_RESP_HDR_SZ / sizeof(u32);
status = scic_sds_unsolicited_frame_control_get_header(
&(scic_sds_request_get_controller(sci_req)->uf_control),
frame_index,
&frame_header);
/* byte swap the header. */
sci_swab32_cpy(rsp_hdr, frame_header, word_cnt);
if (rsp_hdr->frame_type == SMP_RESPONSE) {
void *smp_resp;
status = scic_sds_unsolicited_frame_control_get_buffer(
&(scic_sds_request_get_controller(sci_req)->uf_control),
frame_index,
&smp_resp);
word_cnt = (sizeof(struct smp_req) - SMP_RESP_HDR_SZ) /
sizeof(u32);
sci_swab32_cpy(((u8 *) rsp_hdr) + SMP_RESP_HDR_SZ,
smp_resp, word_cnt);
scic_sds_request_set_status(
sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS);
sci_base_state_machine_change_state(&sci_req->state_machine,
SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION);
} else {
/* This was not a response frame why did it get forwarded? */
dev_err(scic_to_dev(sci_req->owning_controller),
"%s: SCIC SMP Request 0x%p received unexpected frame "
"%d type 0x%02x\n",
__func__,
sci_req,
frame_index,
rsp_hdr->frame_type);
scic_sds_request_set_status(
sci_req,
SCU_TASK_DONE_SMP_FRM_TYPE_ERR,
SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR);
sci_base_state_machine_change_state(
&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
}
scic_sds_controller_release_frame(sci_req->owning_controller,
frame_index);
return SCI_SUCCESS;
}
/**
* This method processes the completions transport layer (TL) status to
* determine if the SMP request was sent successfully. If the SMP request
* was sent successfully, then the state for the SMP request transits to
* waiting for a response frame.
* @sci_req: This parameter specifies the request for which the TC
* completion was received.
* @completion_code: This parameter indicates the completion status information
* for the TC.
*
* Indicate if the tc completion handler was successful. SCI_SUCCESS currently
* this method always returns success.
*/
static enum sci_status scic_sds_smp_request_await_tc_completion_tc_completion_handler(
struct scic_sds_request *sci_req,
u32 completion_code)
{
switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
scic_sds_request_set_status(
sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS
);
sci_base_state_machine_change_state(
&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
break;
default:
/*
* All other completion status cause the IO to be complete. If a NAK
* was received, then it is up to the user to retry the request. */
scic_sds_request_set_status(
sci_req,
SCU_NORMALIZE_COMPLETION_STATUS(completion_code),
SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR
);
sci_base_state_machine_change_state(
&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
break;
}
return SCI_SUCCESS;
}
static const struct scic_sds_io_request_state_handler scic_sds_request_state_handler_table[] = {
[SCI_BASE_REQUEST_STATE_INITIAL] = { },
[SCI_BASE_REQUEST_STATE_CONSTRUCTED] = {
@ -1280,6 +1458,15 @@ static const struct scic_sds_io_request_state_handler scic_sds_request_state_han
.abort_handler = scic_sds_ssp_task_request_await_tc_response_abort_handler,
.frame_handler = scic_sds_ssp_task_request_await_tc_response_frame_handler,
},
[SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE] = {
.abort_handler = scic_sds_request_started_state_abort_handler,
.tc_completion_handler = scic_sds_smp_request_await_response_tc_completion_handler,
.frame_handler = scic_sds_smp_request_await_response_frame_handler,
},
[SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION] = {
.abort_handler = scic_sds_request_started_state_abort_handler,
.tc_completion_handler = scic_sds_smp_request_await_tc_completion_tc_completion_handler,
},
[SCI_BASE_REQUEST_STATE_COMPLETED] = {
.complete_handler = scic_sds_request_completed_state_complete_handler,
},
@ -2038,6 +2225,12 @@ static void scic_sds_request_started_state_enter(void *object)
struct sci_base_state_machine *sm = &sci_req->state_machine;
struct isci_request *ireq = sci_req_to_ireq(sci_req);
struct domain_device *dev = sci_dev_to_domain(sci_req->target_device);
struct sas_task *task;
/* XXX as hch said always creating an internal sas_task for tmf
* requests would simplify the driver
*/
task = ireq->ttype == io_task ? isci_request_access_task(ireq) : NULL;
SET_STATE_HANDLER(
sci_req,
@ -2045,15 +2238,19 @@ static void scic_sds_request_started_state_enter(void *object)
SCI_BASE_REQUEST_STATE_STARTED
);
if (ireq->ttype == tmf_task && dev->dev_type == SAS_END_DEV)
sci_base_state_machine_change_state(sm,
SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION);
/* Most of the request state machines have a started substate machine so
* start its execution on the entry to the started state.
*/
if (sci_req->has_started_substate_machine == true)
sci_base_state_machine_start(&sci_req->started_substate_machine);
if (!task && dev->dev_type == SAS_END_DEV) {
sci_base_state_machine_change_state(sm,
SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION);
} else if (task && task->task_proto == SAS_PROTOCOL_SMP) {
sci_base_state_machine_change_state(sm,
SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE);
}
}
/**
@ -2173,6 +2370,28 @@ static void scic_sds_io_request_started_task_mgmt_await_task_response_substate_e
);
}
static void scic_sds_smp_request_started_await_response_substate_enter(void *object)
{
struct scic_sds_request *sci_req = object;
SET_STATE_HANDLER(
sci_req,
scic_sds_request_state_handler_table,
SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE
);
}
static void scic_sds_smp_request_started_await_tc_completion_substate_enter(void *object)
{
struct scic_sds_request *sci_req = object;
SET_STATE_HANDLER(
sci_req,
scic_sds_request_state_handler_table,
SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION
);
}
static const struct sci_base_state scic_sds_request_state_table[] = {
[SCI_BASE_REQUEST_STATE_INITIAL] = {
.enter_state = scic_sds_request_initial_state_enter,
@ -2190,6 +2409,12 @@ static const struct sci_base_state scic_sds_request_state_table[] = {
[SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE] = {
.enter_state = scic_sds_io_request_started_task_mgmt_await_task_response_substate_enter,
},
[SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE] = {
.enter_state = scic_sds_smp_request_started_await_response_substate_enter,
},
[SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION] = {
.enter_state = scic_sds_smp_request_started_await_tc_completion_substate_enter,
},
[SCI_BASE_REQUEST_STATE_COMPLETED] = {
.enter_state = scic_sds_request_completed_state_enter,
},
@ -2225,7 +2450,7 @@ static void scic_sds_general_request_construct(struct scic_sds_controller *scic,
if (io_tag == SCI_CONTROLLER_INVALID_IO_TAG) {
sci_req->was_tag_assigned_by_user = false;
sci_req->task_context_buffer = NULL;
sci_req->task_context_buffer = &sci_req->tc;
} else {
sci_req->was_tag_assigned_by_user = true;
@ -2245,26 +2470,20 @@ scic_io_request_construct(struct scic_sds_controller *scic,
/* Build the common part of the request */
scic_sds_general_request_construct(scic, sci_dev, io_tag, sci_req);
if (sci_dev->rnc.remote_node_index ==
SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX)
if (sci_dev->rnc.remote_node_index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX)
return SCI_FAILURE_INVALID_REMOTE_DEVICE;
if (dev->dev_type == SAS_END_DEV)
scic_sds_ssp_io_request_assign_buffers(sci_req);
else if ((dev->dev_type == SATA_DEV) ||
(dev->tproto & SAS_PROTOCOL_STP)) {
scic_sds_stp_request_assign_buffers(sci_req);
/* pass */;
else if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP))
memset(&sci_req->stp.cmd, 0, sizeof(sci_req->stp.cmd));
} else if (dev_is_expander(dev)) {
scic_sds_smp_request_assign_buffers(sci_req);
else if (dev_is_expander(dev))
memset(&sci_req->smp.cmd, 0, sizeof(sci_req->smp.cmd));
} else
status = SCI_FAILURE_UNSUPPORTED_PROTOCOL;
else
return SCI_FAILURE_UNSUPPORTED_PROTOCOL;
if (status == SCI_SUCCESS) {
memset(sci_req->task_context_buffer, 0,
offsetof(struct scu_task_context, sgl_pair_ab));
}
return status;
}
@ -2279,17 +2498,12 @@ enum sci_status scic_task_request_construct(struct scic_sds_controller *scic,
/* Build the common part of the request */
scic_sds_general_request_construct(scic, sci_dev, io_tag, sci_req);
if (dev->dev_type == SAS_END_DEV)
scic_sds_ssp_task_request_assign_buffers(sci_req);
else if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP))
scic_sds_stp_request_assign_buffers(sci_req);
else
status = SCI_FAILURE_UNSUPPORTED_PROTOCOL;
if (status == SCI_SUCCESS) {
if (dev->dev_type == SAS_END_DEV ||
dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) {
sci_req->is_task_management_request = true;
memset(sci_req->task_context_buffer, 0, sizeof(struct scu_task_context));
}
} else
status = SCI_FAILURE_UNSUPPORTED_PROTOCOL;
return status;
}
@ -2340,6 +2554,174 @@ static enum sci_status isci_request_stp_request_construct(
return status;
}
/*
* This function will fill in the SCU Task Context for a SMP request. The
* following important settings are utilized: -# task_type ==
* SCU_TASK_TYPE_SMP. This simply indicates that a normal request type
* (i.e. non-raw frame) is being utilized to perform task management. -#
* control_frame == 1. This ensures that the proper endianess is set so
* that the bytes are transmitted in the right order for a smp request frame.
* @sci_req: This parameter specifies the smp request object being
* constructed.
*
*/
static void
scu_smp_request_construct_task_context(struct scic_sds_request *sci_req,
struct smp_req *smp_req)
{
dma_addr_t dma_addr;
struct scic_sds_controller *scic;
struct scic_sds_remote_device *sci_dev;
struct scic_sds_port *sci_port;
struct scu_task_context *task_context;
ssize_t word_cnt = sizeof(struct smp_req) / sizeof(u32);
/* byte swap the smp request. */
sci_swab32_cpy(&sci_req->smp.cmd, smp_req,
word_cnt);
task_context = scic_sds_request_get_task_context(sci_req);
scic = scic_sds_request_get_controller(sci_req);
sci_dev = scic_sds_request_get_device(sci_req);
sci_port = scic_sds_request_get_port(sci_req);
/*
* Fill in the TC with the its required data
* 00h
*/
task_context->priority = 0;
task_context->initiator_request = 1;
task_context->connection_rate = sci_dev->connection_rate;
task_context->protocol_engine_index =
scic_sds_controller_get_protocol_engine_group(scic);
task_context->logical_port_index = scic_sds_port_get_index(sci_port);
task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SMP;
task_context->abort = 0;
task_context->valid = SCU_TASK_CONTEXT_VALID;
task_context->context_type = SCU_TASK_CONTEXT_TYPE;
/* 04h */
task_context->remote_node_index = sci_dev->rnc.remote_node_index;
task_context->command_code = 0;
task_context->task_type = SCU_TASK_TYPE_SMP_REQUEST;
/* 08h */
task_context->link_layer_control = 0;
task_context->do_not_dma_ssp_good_response = 1;
task_context->strict_ordering = 0;
task_context->control_frame = 1;
task_context->timeout_enable = 0;
task_context->block_guard_enable = 0;
/* 0ch */
task_context->address_modifier = 0;
/* 10h */
task_context->ssp_command_iu_length = smp_req->req_len;
/* 14h */
task_context->transfer_length_bytes = 0;
/*
* 18h ~ 30h, protocol specific
* since commandIU has been build by framework at this point, we just
* copy the frist DWord from command IU to this location. */
memcpy(&task_context->type.smp, &sci_req->smp.cmd, sizeof(u32));
/*
* 40h
* "For SMP you could program it to zero. We would prefer that way
* so that done code will be consistent." - Venki
*/
task_context->task_phase = 0;
if (sci_req->was_tag_assigned_by_user) {
/*
* Build the task context now since we have already read
* the data
*/
sci_req->post_context =
(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
(scic_sds_controller_get_protocol_engine_group(scic) <<
SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
(scic_sds_port_get_index(sci_port) <<
SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) |
scic_sds_io_tag_get_index(sci_req->io_tag));
} else {
/*
* Build the task context now since we have already read
* the data.
* I/O tag index is not assigned because we have to wait
* until we get a TCi.
*/
sci_req->post_context =
(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
(scic_sds_controller_get_protocol_engine_group(scic) <<
SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
(scic_sds_port_get_index(sci_port) <<
SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT));
}
/*
* Copy the physical address for the command buffer to the SCU Task
* Context command buffer should not contain command header.
*/
dma_addr = scic_io_request_get_dma_addr(sci_req,
((char *) &sci_req->smp.cmd) +
sizeof(u32));
task_context->command_iu_upper = upper_32_bits(dma_addr);
task_context->command_iu_lower = lower_32_bits(dma_addr);
/* SMP response comes as UF, so no need to set response IU address. */
task_context->response_iu_upper = 0;
task_context->response_iu_lower = 0;
}
static enum sci_status scic_io_request_construct_smp(struct scic_sds_request *sci_req)
{
struct smp_req *smp_req = kmalloc(sizeof(*smp_req), GFP_KERNEL);
if (!smp_req)
return SCI_FAILURE_INSUFFICIENT_RESOURCES;
sci_req->protocol = SCIC_SMP_PROTOCOL;
/* Construct the SMP SCU Task Context */
memcpy(smp_req, &sci_req->smp.cmd, sizeof(*smp_req));
/*
* Look at the SMP requests' header fields; for certain SAS 1.x SMP
* functions under SAS 2.0, a zero request length really indicates
* a non-zero default length. */
if (smp_req->req_len == 0) {
switch (smp_req->func) {
case SMP_DISCOVER:
case SMP_REPORT_PHY_ERR_LOG:
case SMP_REPORT_PHY_SATA:
case SMP_REPORT_ROUTE_INFO:
smp_req->req_len = 2;
break;
case SMP_CONF_ROUTE_INFO:
case SMP_PHY_CONTROL:
case SMP_PHY_TEST_FUNCTION:
smp_req->req_len = 9;
break;
/* Default - zero is a valid default for 2.0. */
}
}
scu_smp_request_construct_task_context(sci_req, smp_req);
sci_base_state_machine_change_state(&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_CONSTRUCTED);
kfree(smp_req);
return SCI_SUCCESS;
}
/*
* isci_smp_request_build() - This function builds the smp request.
* @ireq: This parameter points to the isci_request allocated in the

42
drivers/scsi/isci/request.h
Просмотреть файл

@ -88,7 +88,7 @@ enum sci_request_protocol {
SCIC_SMP_PROTOCOL,
SCIC_SSP_PROTOCOL,
SCIC_STP_PROTOCOL
}; /* XXX remove me, use sas_task.dev instead */;
}; /* XXX remove me, use sas_task.{dev|task_proto} instead */;
struct scic_sds_request {
/**
@ -309,6 +309,19 @@ enum sci_base_request_states {
*/
SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE,
/**
* This sub-state indicates that the started task management request
* is waiting for the reception of an unsolicited frame
* (i.e. response IU).
*/
SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE,
/**
* The AWAIT_TC_COMPLETION sub-state indicates that the started SMP request is
* waiting for the transmission of the initial frame (i.e. command, task, etc.).
*/
SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION,
/**
* This state indicates that the request has completed.
* This state is entered from the STARTED state. This state is entered from
@ -461,8 +474,6 @@ scic_sds_io_request_tc_completion(struct scic_sds_request *request, u32 completi
}
void scic_sds_request_build_sgl(struct scic_sds_request *sci_req);
void scic_sds_stp_request_assign_buffers(struct scic_sds_request *sci_req);
void scic_sds_smp_request_assign_buffers(struct scic_sds_request *sci_req);
enum sci_status scic_sds_request_start(struct scic_sds_request *sci_req);
enum sci_status scic_sds_io_request_terminate(struct scic_sds_request *sci_req);
enum sci_status scic_sds_io_request_event_handler(struct scic_sds_request *sci_req,
@ -473,30 +484,6 @@ enum sci_status scic_sds_task_request_terminate(struct scic_sds_request *sci_req
enum sci_status scic_sds_request_started_state_abort_handler(struct scic_sds_request *sci_req);
/**
* enum _scic_sds_smp_request_started_substates - This enumeration depicts all
* of the substates for a SMP request to be performed in the STARTED
* super-state.
*
*
*/
enum scic_sds_smp_request_started_substates {
/**
* This sub-state indicates that the started task management request
* is waiting for the reception of an unsolicited frame
* (i.e. response IU).
*/
SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE,
/**
* The AWAIT_TC_COMPLETION sub-state indicates that the started SMP request is
* waiting for the transmission of the initial frame (i.e. command, task, etc.).
*/
SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION,
};
/* XXX open code in caller */
static inline void *scic_request_get_virt_addr(struct scic_sds_request *sci_req,
dma_addr_t phys_addr)
@ -791,7 +778,6 @@ enum sci_status scic_task_request_construct(struct scic_sds_controller *scic,
struct scic_sds_request *sci_req);
enum sci_status scic_task_request_construct_ssp(struct scic_sds_request *sci_req);
enum sci_status scic_task_request_construct_sata(struct scic_sds_request *sci_req);
enum sci_status scic_io_request_construct_smp(struct scic_sds_request *sci_req);
void scic_stp_io_request_set_ncq_tag(struct scic_sds_request *sci_req, u16 ncq_tag);
void scic_sds_smp_request_copy_response(struct scic_sds_request *sci_req);
#endif /* !defined(_ISCI_REQUEST_H_) */

518
drivers/scsi/isci/smp_request.c
Просмотреть файл

@ -1,518 +0,0 @@
/*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*
* BSD LICENSE
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <scsi/sas.h>
#include "state_machine.h"
#include "remote_device.h"
#include "request.h"
#include "scu_completion_codes.h"
#include "scu_task_context.h"
#include "host.h"
static void scu_smp_request_construct_task_context(
struct scic_sds_request *sci_req,
struct smp_req *smp_req);
void scic_sds_smp_request_assign_buffers(struct scic_sds_request *sci_req)
{
if (sci_req->was_tag_assigned_by_user == false)
sci_req->task_context_buffer = &sci_req->tc;
}
/*
* This function will fill in the SCU Task Context for a SMP request. The
* following important settings are utilized: -# task_type ==
* SCU_TASK_TYPE_SMP. This simply indicates that a normal request type
* (i.e. non-raw frame) is being utilized to perform task management. -#
* control_frame == 1. This ensures that the proper endianess is set so
* that the bytes are transmitted in the right order for a smp request frame.
* @sci_req: This parameter specifies the smp request object being
* constructed.
*
*/
static void
scu_smp_request_construct_task_context(struct scic_sds_request *sci_req,
struct smp_req *smp_req)
{
dma_addr_t dma_addr;
struct scic_sds_controller *scic;
struct scic_sds_remote_device *sci_dev;
struct scic_sds_port *sci_port;
struct scu_task_context *task_context;
ssize_t word_cnt = sizeof(struct smp_req) / sizeof(u32);
/* byte swap the smp request. */
sci_swab32_cpy(&sci_req->smp.cmd, smp_req,
word_cnt);
task_context = scic_sds_request_get_task_context(sci_req);
scic = scic_sds_request_get_controller(sci_req);
sci_dev = scic_sds_request_get_device(sci_req);
sci_port = scic_sds_request_get_port(sci_req);
/*
* Fill in the TC with the its required data
* 00h
*/
task_context->priority = 0;
task_context->initiator_request = 1;
task_context->connection_rate = sci_dev->connection_rate;
task_context->protocol_engine_index =
scic_sds_controller_get_protocol_engine_group(scic);
task_context->logical_port_index = scic_sds_port_get_index(sci_port);
task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SMP;
task_context->abort = 0;
task_context->valid = SCU_TASK_CONTEXT_VALID;
task_context->context_type = SCU_TASK_CONTEXT_TYPE;
/* 04h */
task_context->remote_node_index = sci_dev->rnc.remote_node_index;
task_context->command_code = 0;
task_context->task_type = SCU_TASK_TYPE_SMP_REQUEST;
/* 08h */
task_context->link_layer_control = 0;
task_context->do_not_dma_ssp_good_response = 1;
task_context->strict_ordering = 0;
task_context->control_frame = 1;
task_context->timeout_enable = 0;
task_context->block_guard_enable = 0;
/* 0ch */
task_context->address_modifier = 0;
/* 10h */
task_context->ssp_command_iu_length = smp_req->req_len;
/* 14h */
task_context->transfer_length_bytes = 0;
/*
* 18h ~ 30h, protocol specific
* since commandIU has been build by framework at this point, we just
* copy the frist DWord from command IU to this location. */
memcpy(&task_context->type.smp, &sci_req->smp.cmd, sizeof(u32));
/*
* 40h
* "For SMP you could program it to zero. We would prefer that way
* so that done code will be consistent." - Venki
*/
task_context->task_phase = 0;
if (sci_req->was_tag_assigned_by_user) {
/*
* Build the task context now since we have already read
* the data
*/
sci_req->post_context =
(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
(scic_sds_controller_get_protocol_engine_group(scic) <<
SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
(scic_sds_port_get_index(sci_port) <<
SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) |
scic_sds_io_tag_get_index(sci_req->io_tag));
} else {
/*
* Build the task context now since we have already read
* the data.
* I/O tag index is not assigned because we have to wait
* until we get a TCi.
*/
sci_req->post_context =
(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
(scic_sds_controller_get_protocol_engine_group(scic) <<
SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
(scic_sds_port_get_index(sci_port) <<
SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT));
}
/*
* Copy the physical address for the command buffer to the SCU Task
* Context command buffer should not contain command header.
*/
dma_addr = scic_io_request_get_dma_addr(sci_req,
((char *) &sci_req->smp.cmd) +
sizeof(u32));
task_context->command_iu_upper = upper_32_bits(dma_addr);
task_context->command_iu_lower = lower_32_bits(dma_addr);
/* SMP response comes as UF, so no need to set response IU address. */
task_context->response_iu_upper = 0;
task_context->response_iu_lower = 0;
}
/*
* This function processes an unsolicited frame while the SMP request is waiting
* for a response frame. It will copy the response data, release the
* unsolicited frame, and transition the request to the
* SCI_BASE_REQUEST_STATE_COMPLETED state.
* @sci_req: This parameter specifies the request for which the
* unsolicited frame was received.
* @frame_index: This parameter indicates the unsolicited frame index that
* should contain the response.
*
* This function returns an indication of whether the response frame was handled
* successfully or not. SCI_SUCCESS Currently this value is always returned and
* indicates successful processing of the TC response.
*/
static enum sci_status
scic_sds_smp_request_await_response_frame_handler(struct scic_sds_request *sci_req,
u32 frame_index)
{
enum sci_status status;
void *frame_header;
struct smp_resp *rsp_hdr = &sci_req->smp.rsp;
ssize_t word_cnt = SMP_RESP_HDR_SZ / sizeof(u32);
status = scic_sds_unsolicited_frame_control_get_header(
&(scic_sds_request_get_controller(sci_req)->uf_control),
frame_index,
&frame_header);
/* byte swap the header. */
sci_swab32_cpy(rsp_hdr, frame_header, word_cnt);
if (rsp_hdr->frame_type == SMP_RESPONSE) {
void *smp_resp;
status = scic_sds_unsolicited_frame_control_get_buffer(
&(scic_sds_request_get_controller(sci_req)->uf_control),
frame_index,
&smp_resp);
word_cnt = (sizeof(struct smp_req) - SMP_RESP_HDR_SZ) /
sizeof(u32);
sci_swab32_cpy(((u8 *) rsp_hdr) + SMP_RESP_HDR_SZ,
smp_resp, word_cnt);
scic_sds_request_set_status(
sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS);
sci_base_state_machine_change_state(
&sci_req->started_substate_machine,
SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION);
} else {
/* This was not a response frame why did it get forwarded? */
dev_err(scic_to_dev(sci_req->owning_controller),
"%s: SCIC SMP Request 0x%p received unexpected frame "
"%d type 0x%02x\n",
__func__,
sci_req,
frame_index,
rsp_hdr->frame_type);
scic_sds_request_set_status(
sci_req,
SCU_TASK_DONE_SMP_FRM_TYPE_ERR,
SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR);
sci_base_state_machine_change_state(
&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
}
scic_sds_controller_release_frame(sci_req->owning_controller,
frame_index);
return SCI_SUCCESS;
}
/**
* This method processes an abnormal TC completion while the SMP request is
* waiting for a response frame. It decides what happened to the IO based
* on TC completion status.
* @sci_req: This parameter specifies the request for which the TC
* completion was received.
* @completion_code: This parameter indicates the completion status information
* for the TC.
*
* Indicate if the tc completion handler was successful. SCI_SUCCESS currently
* this method always returns success.
*/
static enum sci_status scic_sds_smp_request_await_response_tc_completion_handler(
struct scic_sds_request *sci_req,
u32 completion_code)
{
switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
/*
* In the AWAIT RESPONSE state, any TC completion is unexpected.
* but if the TC has success status, we complete the IO anyway. */
scic_sds_request_set_status(
sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS
);
sci_base_state_machine_change_state(
&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
break;
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_RESP_TO_ERR):
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_UFI_ERR):
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_FRM_TYPE_ERR):
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_LL_RX_ERR):
/*
* These status has been seen in a specific LSI expander, which sometimes
* is not able to send smp response within 2 ms. This causes our hardware
* break the connection and set TC completion with one of these SMP_XXX_XX_ERR
* status. For these type of error, we ask scic user to retry the request. */
scic_sds_request_set_status(
sci_req, SCU_TASK_DONE_SMP_RESP_TO_ERR, SCI_FAILURE_RETRY_REQUIRED
);
sci_base_state_machine_change_state(
&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
break;
default:
/*
* All other completion status cause the IO to be complete. If a NAK
* was received, then it is up to the user to retry the request. */
scic_sds_request_set_status(
sci_req,
SCU_NORMALIZE_COMPLETION_STATUS(completion_code),
SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR
);
sci_base_state_machine_change_state(
&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
break;
}
return SCI_SUCCESS;
}
/**
* This method processes the completions transport layer (TL) status to
* determine if the SMP request was sent successfully. If the SMP request
* was sent successfully, then the state for the SMP request transits to
* waiting for a response frame.
* @sci_req: This parameter specifies the request for which the TC
* completion was received.
* @completion_code: This parameter indicates the completion status information
* for the TC.
*
* Indicate if the tc completion handler was successful. SCI_SUCCESS currently
* this method always returns success.
*/
static enum sci_status scic_sds_smp_request_await_tc_completion_tc_completion_handler(
struct scic_sds_request *sci_req,
u32 completion_code)
{
switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
scic_sds_request_set_status(
sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS
);
sci_base_state_machine_change_state(
&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
break;
default:
/*
* All other completion status cause the IO to be complete. If a NAK
* was received, then it is up to the user to retry the request. */
scic_sds_request_set_status(
sci_req,
SCU_NORMALIZE_COMPLETION_STATUS(completion_code),
SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR
);
sci_base_state_machine_change_state(
&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
break;
}
return SCI_SUCCESS;
}
static const struct scic_sds_io_request_state_handler scic_sds_smp_request_started_substate_handler_table[] = {
[SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE] = {
.abort_handler = scic_sds_request_started_state_abort_handler,
.tc_completion_handler = scic_sds_smp_request_await_response_tc_completion_handler,
.frame_handler = scic_sds_smp_request_await_response_frame_handler,
},
[SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION] = {
.abort_handler = scic_sds_request_started_state_abort_handler,
.tc_completion_handler = scic_sds_smp_request_await_tc_completion_tc_completion_handler,
}
};
/**
* This method performs the actions required when entering the
* SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_RESPONSE sub-state. This
* includes setting the IO request state handlers for this sub-state.
* @object: This parameter specifies the request object for which the sub-state
* change is occurring.
*
* none.
*/
static void scic_sds_smp_request_started_await_response_substate_enter(
void *object)
{
struct scic_sds_request *sci_req = object;
SET_STATE_HANDLER(
sci_req,
scic_sds_smp_request_started_substate_handler_table,
SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE
);
}
/**
* This method performs the actions required when entering the
* SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION sub-state.
* This includes setting the SMP request state handlers for this sub-state.
* @object: This parameter specifies the request object for which the sub-state
* change is occurring.
*
* none.
*/
static void scic_sds_smp_request_started_await_tc_completion_substate_enter(
void *object)
{
struct scic_sds_request *sci_req = object;
SET_STATE_HANDLER(
sci_req,
scic_sds_smp_request_started_substate_handler_table,
SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION
);
}
static const struct sci_base_state scic_sds_smp_request_started_substate_table[] = {
[SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE] = {
.enter_state = scic_sds_smp_request_started_await_response_substate_enter,
},
[SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION] = {
.enter_state = scic_sds_smp_request_started_await_tc_completion_substate_enter,
},
};
/**
* This method is called by the SCI user to build an SMP IO request.
*
* - The user must have previously called scic_io_request_construct() on the
* supplied IO request. Indicate if the controller successfully built the IO
* request. SCI_SUCCESS This value is returned if the IO request was
* successfully built. SCI_FAILURE_UNSUPPORTED_PROTOCOL This value is returned
* if the remote_device does not support the SMP protocol.
* SCI_FAILURE_INVALID_ASSOCIATION This value is returned if the user did not
* properly set the association between the SCIC IO request and the user's IO
* request.
*/
enum sci_status scic_io_request_construct_smp(struct scic_sds_request *sci_req)
{
struct smp_req *smp_req = kmalloc(sizeof(*smp_req), GFP_KERNEL);
if (!smp_req)
return SCI_FAILURE_INSUFFICIENT_RESOURCES;
sci_req->protocol = SCIC_SMP_PROTOCOL;
sci_req->has_started_substate_machine = true;
/* Construct the started sub-state machine. */
sci_base_state_machine_construct(
&sci_req->started_substate_machine,
sci_req,
scic_sds_smp_request_started_substate_table,
SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE
);
/* Construct the SMP SCU Task Context */
memcpy(smp_req, &sci_req->smp.cmd, sizeof(*smp_req));
/*
* Look at the SMP requests' header fields; for certain SAS 1.x SMP
* functions under SAS 2.0, a zero request length really indicates
* a non-zero default length. */
if (smp_req->req_len == 0) {
switch (smp_req->func) {
case SMP_DISCOVER:
case SMP_REPORT_PHY_ERR_LOG:
case SMP_REPORT_PHY_SATA:
case SMP_REPORT_ROUTE_INFO:
smp_req->req_len = 2;
break;
case SMP_CONF_ROUTE_INFO:
case SMP_PHY_CONTROL:
case SMP_PHY_TEST_FUNCTION:
smp_req->req_len = 9;
break;
/* Default - zero is a valid default for 2.0. */
}
}
scu_smp_request_construct_task_context(sci_req, smp_req);
sci_base_state_machine_change_state(&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_CONSTRUCTED);
kfree(smp_req);
return SCI_SUCCESS;
}

6
drivers/scsi/isci/stp_request.c
Просмотреть файл

@ -64,12 +64,6 @@
#include "scu_task_context.h"
#include "request.h"
void scic_sds_stp_request_assign_buffers(struct scic_sds_request *sci_req)
{
if (sci_req->was_tag_assigned_by_user == false)
sci_req->task_context_buffer = &sci_req->tc;
}
/**
* This method is will fill in the SCU Task Context for any type of SATA
* request. This is called from the various SATA constructors.