/* * 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 #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; }