mirror of https://gitee.com/openkylin/linux.git
2752 lines
81 KiB
C
2752 lines
81 KiB
C
/*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/circ_buf.h>
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#include <linux/device.h>
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#include <scsi/sas.h>
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#include "host.h"
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#include "isci.h"
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#include "port.h"
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#include "host.h"
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#include "probe_roms.h"
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#include "remote_device.h"
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#include "request.h"
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#include "scu_completion_codes.h"
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#include "scu_event_codes.h"
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#include "registers.h"
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#include "scu_remote_node_context.h"
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#include "scu_task_context.h"
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#define SCU_CONTEXT_RAM_INIT_STALL_TIME 200
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#define smu_max_ports(dcc_value) \
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(\
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(((dcc_value) & SMU_DEVICE_CONTEXT_CAPACITY_MAX_LP_MASK) \
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>> SMU_DEVICE_CONTEXT_CAPACITY_MAX_LP_SHIFT) + 1 \
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)
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#define smu_max_task_contexts(dcc_value) \
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(\
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(((dcc_value) & SMU_DEVICE_CONTEXT_CAPACITY_MAX_TC_MASK) \
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>> SMU_DEVICE_CONTEXT_CAPACITY_MAX_TC_SHIFT) + 1 \
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)
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#define smu_max_rncs(dcc_value) \
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(\
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(((dcc_value) & SMU_DEVICE_CONTEXT_CAPACITY_MAX_RNC_MASK) \
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>> SMU_DEVICE_CONTEXT_CAPACITY_MAX_RNC_SHIFT) + 1 \
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)
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#define SCIC_SDS_CONTROLLER_PHY_START_TIMEOUT 100
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/**
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*
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*
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* The number of milliseconds to wait while a given phy is consuming power
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* before allowing another set of phys to consume power. Ultimately, this will
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* be specified by OEM parameter.
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*/
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#define SCIC_SDS_CONTROLLER_POWER_CONTROL_INTERVAL 500
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/**
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* NORMALIZE_PUT_POINTER() -
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*
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* This macro will normalize the completion queue put pointer so its value can
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* be used as an array inde
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*/
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#define NORMALIZE_PUT_POINTER(x) \
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((x) & SMU_COMPLETION_QUEUE_PUT_POINTER_MASK)
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/**
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* NORMALIZE_EVENT_POINTER() -
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*
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* This macro will normalize the completion queue event entry so its value can
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* be used as an index.
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*/
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#define NORMALIZE_EVENT_POINTER(x) \
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(\
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((x) & SMU_COMPLETION_QUEUE_GET_EVENT_POINTER_MASK) \
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>> SMU_COMPLETION_QUEUE_GET_EVENT_POINTER_SHIFT \
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)
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/**
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* NORMALIZE_GET_POINTER() -
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*
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* This macro will normalize the completion queue get pointer so its value can
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* be used as an index into an array
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*/
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#define NORMALIZE_GET_POINTER(x) \
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((x) & SMU_COMPLETION_QUEUE_GET_POINTER_MASK)
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/**
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* NORMALIZE_GET_POINTER_CYCLE_BIT() -
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*
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* This macro will normalize the completion queue cycle pointer so it matches
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* the completion queue cycle bit
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*/
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#define NORMALIZE_GET_POINTER_CYCLE_BIT(x) \
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((SMU_CQGR_CYCLE_BIT & (x)) << (31 - SMU_COMPLETION_QUEUE_GET_CYCLE_BIT_SHIFT))
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/**
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* COMPLETION_QUEUE_CYCLE_BIT() -
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*
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* This macro will return the cycle bit of the completion queue entry
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*/
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#define COMPLETION_QUEUE_CYCLE_BIT(x) ((x) & 0x80000000)
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/* Init the state machine and call the state entry function (if any) */
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void sci_init_sm(struct sci_base_state_machine *sm,
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const struct sci_base_state *state_table, u32 initial_state)
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{
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sci_state_transition_t handler;
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sm->initial_state_id = initial_state;
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sm->previous_state_id = initial_state;
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sm->current_state_id = initial_state;
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sm->state_table = state_table;
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handler = sm->state_table[initial_state].enter_state;
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if (handler)
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handler(sm);
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}
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/* Call the state exit fn, update the current state, call the state entry fn */
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void sci_change_state(struct sci_base_state_machine *sm, u32 next_state)
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{
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sci_state_transition_t handler;
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handler = sm->state_table[sm->current_state_id].exit_state;
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if (handler)
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handler(sm);
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sm->previous_state_id = sm->current_state_id;
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sm->current_state_id = next_state;
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handler = sm->state_table[sm->current_state_id].enter_state;
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if (handler)
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handler(sm);
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}
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static bool sci_controller_completion_queue_has_entries(struct isci_host *ihost)
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{
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u32 get_value = ihost->completion_queue_get;
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u32 get_index = get_value & SMU_COMPLETION_QUEUE_GET_POINTER_MASK;
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if (NORMALIZE_GET_POINTER_CYCLE_BIT(get_value) ==
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COMPLETION_QUEUE_CYCLE_BIT(ihost->completion_queue[get_index]))
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return true;
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return false;
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}
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static bool sci_controller_isr(struct isci_host *ihost)
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{
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if (sci_controller_completion_queue_has_entries(ihost)) {
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return true;
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} else {
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/*
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* we have a spurious interrupt it could be that we have already
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* emptied the completion queue from a previous interrupt */
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writel(SMU_ISR_COMPLETION, &ihost->smu_registers->interrupt_status);
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/*
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* There is a race in the hardware that could cause us not to be notified
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* of an interrupt completion if we do not take this step. We will mask
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* then unmask the interrupts so if there is another interrupt pending
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* the clearing of the interrupt source we get the next interrupt message. */
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writel(0xFF000000, &ihost->smu_registers->interrupt_mask);
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writel(0, &ihost->smu_registers->interrupt_mask);
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}
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return false;
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}
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irqreturn_t isci_msix_isr(int vec, void *data)
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{
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struct isci_host *ihost = data;
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if (sci_controller_isr(ihost))
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tasklet_schedule(&ihost->completion_tasklet);
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return IRQ_HANDLED;
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}
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static bool sci_controller_error_isr(struct isci_host *ihost)
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{
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u32 interrupt_status;
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interrupt_status =
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readl(&ihost->smu_registers->interrupt_status);
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interrupt_status &= (SMU_ISR_QUEUE_ERROR | SMU_ISR_QUEUE_SUSPEND);
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if (interrupt_status != 0) {
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/*
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* There is an error interrupt pending so let it through and handle
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* in the callback */
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return true;
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}
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/*
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* There is a race in the hardware that could cause us not to be notified
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* of an interrupt completion if we do not take this step. We will mask
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* then unmask the error interrupts so if there was another interrupt
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* pending we will be notified.
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* Could we write the value of (SMU_ISR_QUEUE_ERROR | SMU_ISR_QUEUE_SUSPEND)? */
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writel(0xff, &ihost->smu_registers->interrupt_mask);
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writel(0, &ihost->smu_registers->interrupt_mask);
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return false;
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}
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static void sci_controller_task_completion(struct isci_host *ihost, u32 ent)
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{
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u32 index = SCU_GET_COMPLETION_INDEX(ent);
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struct isci_request *ireq = ihost->reqs[index];
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/* Make sure that we really want to process this IO request */
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if (test_bit(IREQ_ACTIVE, &ireq->flags) &&
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ireq->io_tag != SCI_CONTROLLER_INVALID_IO_TAG &&
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ISCI_TAG_SEQ(ireq->io_tag) == ihost->io_request_sequence[index])
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/* Yep this is a valid io request pass it along to the
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* io request handler
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*/
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sci_io_request_tc_completion(ireq, ent);
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}
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static void sci_controller_sdma_completion(struct isci_host *ihost, u32 ent)
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{
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u32 index;
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struct isci_request *ireq;
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struct isci_remote_device *idev;
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index = SCU_GET_COMPLETION_INDEX(ent);
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switch (scu_get_command_request_type(ent)) {
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case SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC:
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case SCU_CONTEXT_COMMAND_REQUEST_TYPE_DUMP_TC:
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ireq = ihost->reqs[index];
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dev_warn(&ihost->pdev->dev, "%s: %x for io request %p\n",
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__func__, ent, ireq);
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/* @todo For a post TC operation we need to fail the IO
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* request
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*/
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break;
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case SCU_CONTEXT_COMMAND_REQUEST_TYPE_DUMP_RNC:
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case SCU_CONTEXT_COMMAND_REQUEST_TYPE_OTHER_RNC:
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case SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_RNC:
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idev = ihost->device_table[index];
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dev_warn(&ihost->pdev->dev, "%s: %x for device %p\n",
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__func__, ent, idev);
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/* @todo For a port RNC operation we need to fail the
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* device
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*/
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break;
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default:
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dev_warn(&ihost->pdev->dev, "%s: unknown completion type %x\n",
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__func__, ent);
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break;
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}
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}
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static void sci_controller_unsolicited_frame(struct isci_host *ihost, u32 ent)
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{
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u32 index;
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u32 frame_index;
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struct scu_unsolicited_frame_header *frame_header;
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struct isci_phy *iphy;
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struct isci_remote_device *idev;
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enum sci_status result = SCI_FAILURE;
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frame_index = SCU_GET_FRAME_INDEX(ent);
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frame_header = ihost->uf_control.buffers.array[frame_index].header;
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ihost->uf_control.buffers.array[frame_index].state = UNSOLICITED_FRAME_IN_USE;
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if (SCU_GET_FRAME_ERROR(ent)) {
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/*
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* / @todo If the IAF frame or SIGNATURE FIS frame has an error will
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* / this cause a problem? We expect the phy initialization will
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* / fail if there is an error in the frame. */
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sci_controller_release_frame(ihost, frame_index);
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return;
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}
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if (frame_header->is_address_frame) {
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index = SCU_GET_PROTOCOL_ENGINE_INDEX(ent);
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iphy = &ihost->phys[index];
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result = sci_phy_frame_handler(iphy, frame_index);
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} else {
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index = SCU_GET_COMPLETION_INDEX(ent);
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if (index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX) {
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/*
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* This is a signature fis or a frame from a direct attached SATA
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* device that has not yet been created. In either case forwared
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* the frame to the PE and let it take care of the frame data. */
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index = SCU_GET_PROTOCOL_ENGINE_INDEX(ent);
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iphy = &ihost->phys[index];
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result = sci_phy_frame_handler(iphy, frame_index);
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} else {
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if (index < ihost->remote_node_entries)
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idev = ihost->device_table[index];
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else
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idev = NULL;
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if (idev != NULL)
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result = sci_remote_device_frame_handler(idev, frame_index);
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else
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sci_controller_release_frame(ihost, frame_index);
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}
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}
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if (result != SCI_SUCCESS) {
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/*
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* / @todo Is there any reason to report some additional error message
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* / when we get this failure notifiction? */
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}
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}
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static void sci_controller_event_completion(struct isci_host *ihost, u32 ent)
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{
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struct isci_remote_device *idev;
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struct isci_request *ireq;
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struct isci_phy *iphy;
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u32 index;
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index = SCU_GET_COMPLETION_INDEX(ent);
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switch (scu_get_event_type(ent)) {
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case SCU_EVENT_TYPE_SMU_COMMAND_ERROR:
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/* / @todo The driver did something wrong and we need to fix the condtion. */
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dev_err(&ihost->pdev->dev,
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"%s: SCIC Controller 0x%p received SMU command error "
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"0x%x\n",
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__func__,
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ihost,
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ent);
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break;
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case SCU_EVENT_TYPE_SMU_PCQ_ERROR:
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case SCU_EVENT_TYPE_SMU_ERROR:
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case SCU_EVENT_TYPE_FATAL_MEMORY_ERROR:
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/*
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* / @todo This is a hardware failure and its likely that we want to
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* / reset the controller. */
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dev_err(&ihost->pdev->dev,
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"%s: SCIC Controller 0x%p received fatal controller "
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"event 0x%x\n",
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__func__,
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ihost,
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ent);
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break;
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case SCU_EVENT_TYPE_TRANSPORT_ERROR:
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ireq = ihost->reqs[index];
|
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sci_io_request_event_handler(ireq, ent);
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break;
|
|
|
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case SCU_EVENT_TYPE_PTX_SCHEDULE_EVENT:
|
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switch (scu_get_event_specifier(ent)) {
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case SCU_EVENT_SPECIFIC_SMP_RESPONSE_NO_PE:
|
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case SCU_EVENT_SPECIFIC_TASK_TIMEOUT:
|
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ireq = ihost->reqs[index];
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if (ireq != NULL)
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sci_io_request_event_handler(ireq, ent);
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else
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dev_warn(&ihost->pdev->dev,
|
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"%s: SCIC Controller 0x%p received "
|
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"event 0x%x for io request object "
|
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"that doesnt exist.\n",
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__func__,
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ihost,
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ent);
|
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break;
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|
|
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case SCU_EVENT_SPECIFIC_IT_NEXUS_TIMEOUT:
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idev = ihost->device_table[index];
|
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if (idev != NULL)
|
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sci_remote_device_event_handler(idev, ent);
|
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else
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dev_warn(&ihost->pdev->dev,
|
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"%s: SCIC Controller 0x%p received "
|
|
"event 0x%x for remote device object "
|
|
"that doesnt exist.\n",
|
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__func__,
|
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ihost,
|
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ent);
|
|
|
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break;
|
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}
|
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break;
|
|
|
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case SCU_EVENT_TYPE_BROADCAST_CHANGE:
|
|
/*
|
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* direct the broadcast change event to the phy first and then let
|
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* the phy redirect the broadcast change to the port object */
|
|
case SCU_EVENT_TYPE_ERR_CNT_EVENT:
|
|
/*
|
|
* direct error counter event to the phy object since that is where
|
|
* we get the event notification. This is a type 4 event. */
|
|
case SCU_EVENT_TYPE_OSSP_EVENT:
|
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index = SCU_GET_PROTOCOL_ENGINE_INDEX(ent);
|
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iphy = &ihost->phys[index];
|
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sci_phy_event_handler(iphy, ent);
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break;
|
|
|
|
case SCU_EVENT_TYPE_RNC_SUSPEND_TX:
|
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case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX:
|
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case SCU_EVENT_TYPE_RNC_OPS_MISC:
|
|
if (index < ihost->remote_node_entries) {
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idev = ihost->device_table[index];
|
|
|
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if (idev != NULL)
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sci_remote_device_event_handler(idev, ent);
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} else
|
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dev_err(&ihost->pdev->dev,
|
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"%s: SCIC Controller 0x%p received event 0x%x "
|
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"for remote device object 0x%0x that doesnt "
|
|
"exist.\n",
|
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__func__,
|
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ihost,
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ent,
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index);
|
|
|
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break;
|
|
|
|
default:
|
|
dev_warn(&ihost->pdev->dev,
|
|
"%s: SCIC Controller received unknown event code %x\n",
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__func__,
|
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ent);
|
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break;
|
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}
|
|
}
|
|
|
|
static void sci_controller_process_completions(struct isci_host *ihost)
|
|
{
|
|
u32 completion_count = 0;
|
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u32 ent;
|
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u32 get_index;
|
|
u32 get_cycle;
|
|
u32 event_get;
|
|
u32 event_cycle;
|
|
|
|
dev_dbg(&ihost->pdev->dev,
|
|
"%s: completion queue begining get:0x%08x\n",
|
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__func__,
|
|
ihost->completion_queue_get);
|
|
|
|
/* Get the component parts of the completion queue */
|
|
get_index = NORMALIZE_GET_POINTER(ihost->completion_queue_get);
|
|
get_cycle = SMU_CQGR_CYCLE_BIT & ihost->completion_queue_get;
|
|
|
|
event_get = NORMALIZE_EVENT_POINTER(ihost->completion_queue_get);
|
|
event_cycle = SMU_CQGR_EVENT_CYCLE_BIT & ihost->completion_queue_get;
|
|
|
|
while (
|
|
NORMALIZE_GET_POINTER_CYCLE_BIT(get_cycle)
|
|
== COMPLETION_QUEUE_CYCLE_BIT(ihost->completion_queue[get_index])
|
|
) {
|
|
completion_count++;
|
|
|
|
ent = ihost->completion_queue[get_index];
|
|
|
|
/* increment the get pointer and check for rollover to toggle the cycle bit */
|
|
get_cycle ^= ((get_index+1) & SCU_MAX_COMPLETION_QUEUE_ENTRIES) <<
|
|
(SMU_COMPLETION_QUEUE_GET_CYCLE_BIT_SHIFT - SCU_MAX_COMPLETION_QUEUE_SHIFT);
|
|
get_index = (get_index+1) & (SCU_MAX_COMPLETION_QUEUE_ENTRIES-1);
|
|
|
|
dev_dbg(&ihost->pdev->dev,
|
|
"%s: completion queue entry:0x%08x\n",
|
|
__func__,
|
|
ent);
|
|
|
|
switch (SCU_GET_COMPLETION_TYPE(ent)) {
|
|
case SCU_COMPLETION_TYPE_TASK:
|
|
sci_controller_task_completion(ihost, ent);
|
|
break;
|
|
|
|
case SCU_COMPLETION_TYPE_SDMA:
|
|
sci_controller_sdma_completion(ihost, ent);
|
|
break;
|
|
|
|
case SCU_COMPLETION_TYPE_UFI:
|
|
sci_controller_unsolicited_frame(ihost, ent);
|
|
break;
|
|
|
|
case SCU_COMPLETION_TYPE_EVENT:
|
|
case SCU_COMPLETION_TYPE_NOTIFY: {
|
|
event_cycle ^= ((event_get+1) & SCU_MAX_EVENTS) <<
|
|
(SMU_COMPLETION_QUEUE_GET_EVENT_CYCLE_BIT_SHIFT - SCU_MAX_EVENTS_SHIFT);
|
|
event_get = (event_get+1) & (SCU_MAX_EVENTS-1);
|
|
|
|
sci_controller_event_completion(ihost, ent);
|
|
break;
|
|
}
|
|
default:
|
|
dev_warn(&ihost->pdev->dev,
|
|
"%s: SCIC Controller received unknown "
|
|
"completion type %x\n",
|
|
__func__,
|
|
ent);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Update the get register if we completed one or more entries */
|
|
if (completion_count > 0) {
|
|
ihost->completion_queue_get =
|
|
SMU_CQGR_GEN_BIT(ENABLE) |
|
|
SMU_CQGR_GEN_BIT(EVENT_ENABLE) |
|
|
event_cycle |
|
|
SMU_CQGR_GEN_VAL(EVENT_POINTER, event_get) |
|
|
get_cycle |
|
|
SMU_CQGR_GEN_VAL(POINTER, get_index);
|
|
|
|
writel(ihost->completion_queue_get,
|
|
&ihost->smu_registers->completion_queue_get);
|
|
|
|
}
|
|
|
|
dev_dbg(&ihost->pdev->dev,
|
|
"%s: completion queue ending get:0x%08x\n",
|
|
__func__,
|
|
ihost->completion_queue_get);
|
|
|
|
}
|
|
|
|
static void sci_controller_error_handler(struct isci_host *ihost)
|
|
{
|
|
u32 interrupt_status;
|
|
|
|
interrupt_status =
|
|
readl(&ihost->smu_registers->interrupt_status);
|
|
|
|
if ((interrupt_status & SMU_ISR_QUEUE_SUSPEND) &&
|
|
sci_controller_completion_queue_has_entries(ihost)) {
|
|
|
|
sci_controller_process_completions(ihost);
|
|
writel(SMU_ISR_QUEUE_SUSPEND, &ihost->smu_registers->interrupt_status);
|
|
} else {
|
|
dev_err(&ihost->pdev->dev, "%s: status: %#x\n", __func__,
|
|
interrupt_status);
|
|
|
|
sci_change_state(&ihost->sm, SCIC_FAILED);
|
|
|
|
return;
|
|
}
|
|
|
|
/* If we dont process any completions I am not sure that we want to do this.
|
|
* We are in the middle of a hardware fault and should probably be reset.
|
|
*/
|
|
writel(0, &ihost->smu_registers->interrupt_mask);
|
|
}
|
|
|
|
irqreturn_t isci_intx_isr(int vec, void *data)
|
|
{
|
|
irqreturn_t ret = IRQ_NONE;
|
|
struct isci_host *ihost = data;
|
|
|
|
if (sci_controller_isr(ihost)) {
|
|
writel(SMU_ISR_COMPLETION, &ihost->smu_registers->interrupt_status);
|
|
tasklet_schedule(&ihost->completion_tasklet);
|
|
ret = IRQ_HANDLED;
|
|
} else if (sci_controller_error_isr(ihost)) {
|
|
spin_lock(&ihost->scic_lock);
|
|
sci_controller_error_handler(ihost);
|
|
spin_unlock(&ihost->scic_lock);
|
|
ret = IRQ_HANDLED;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
irqreturn_t isci_error_isr(int vec, void *data)
|
|
{
|
|
struct isci_host *ihost = data;
|
|
|
|
if (sci_controller_error_isr(ihost))
|
|
sci_controller_error_handler(ihost);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* isci_host_start_complete() - This function is called by the core library,
|
|
* through the ISCI Module, to indicate controller start status.
|
|
* @isci_host: This parameter specifies the ISCI host object
|
|
* @completion_status: This parameter specifies the completion status from the
|
|
* core library.
|
|
*
|
|
*/
|
|
static void isci_host_start_complete(struct isci_host *ihost, enum sci_status completion_status)
|
|
{
|
|
if (completion_status != SCI_SUCCESS)
|
|
dev_info(&ihost->pdev->dev,
|
|
"controller start timed out, continuing...\n");
|
|
isci_host_change_state(ihost, isci_ready);
|
|
clear_bit(IHOST_START_PENDING, &ihost->flags);
|
|
wake_up(&ihost->eventq);
|
|
}
|
|
|
|
int isci_host_scan_finished(struct Scsi_Host *shost, unsigned long time)
|
|
{
|
|
struct isci_host *ihost = SHOST_TO_SAS_HA(shost)->lldd_ha;
|
|
|
|
if (test_bit(IHOST_START_PENDING, &ihost->flags))
|
|
return 0;
|
|
|
|
/* todo: use sas_flush_discovery once it is upstream */
|
|
scsi_flush_work(shost);
|
|
|
|
scsi_flush_work(shost);
|
|
|
|
dev_dbg(&ihost->pdev->dev,
|
|
"%s: ihost->status = %d, time = %ld\n",
|
|
__func__, isci_host_get_state(ihost), time);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
/**
|
|
* sci_controller_get_suggested_start_timeout() - This method returns the
|
|
* suggested sci_controller_start() timeout amount. The user is free to
|
|
* use any timeout value, but this method provides the suggested minimum
|
|
* start timeout value. The returned value is based upon empirical
|
|
* information determined as a result of interoperability testing.
|
|
* @controller: the handle to the controller object for which to return the
|
|
* suggested start timeout.
|
|
*
|
|
* This method returns the number of milliseconds for the suggested start
|
|
* operation timeout.
|
|
*/
|
|
static u32 sci_controller_get_suggested_start_timeout(struct isci_host *ihost)
|
|
{
|
|
/* Validate the user supplied parameters. */
|
|
if (!ihost)
|
|
return 0;
|
|
|
|
/*
|
|
* The suggested minimum timeout value for a controller start operation:
|
|
*
|
|
* Signature FIS Timeout
|
|
* + Phy Start Timeout
|
|
* + Number of Phy Spin Up Intervals
|
|
* ---------------------------------
|
|
* Number of milliseconds for the controller start operation.
|
|
*
|
|
* NOTE: The number of phy spin up intervals will be equivalent
|
|
* to the number of phys divided by the number phys allowed
|
|
* per interval - 1 (once OEM parameters are supported).
|
|
* Currently we assume only 1 phy per interval. */
|
|
|
|
return SCIC_SDS_SIGNATURE_FIS_TIMEOUT
|
|
+ SCIC_SDS_CONTROLLER_PHY_START_TIMEOUT
|
|
+ ((SCI_MAX_PHYS - 1) * SCIC_SDS_CONTROLLER_POWER_CONTROL_INTERVAL);
|
|
}
|
|
|
|
static void sci_controller_enable_interrupts(struct isci_host *ihost)
|
|
{
|
|
BUG_ON(ihost->smu_registers == NULL);
|
|
writel(0, &ihost->smu_registers->interrupt_mask);
|
|
}
|
|
|
|
void sci_controller_disable_interrupts(struct isci_host *ihost)
|
|
{
|
|
BUG_ON(ihost->smu_registers == NULL);
|
|
writel(0xffffffff, &ihost->smu_registers->interrupt_mask);
|
|
}
|
|
|
|
static void sci_controller_enable_port_task_scheduler(struct isci_host *ihost)
|
|
{
|
|
u32 port_task_scheduler_value;
|
|
|
|
port_task_scheduler_value =
|
|
readl(&ihost->scu_registers->peg0.ptsg.control);
|
|
port_task_scheduler_value |=
|
|
(SCU_PTSGCR_GEN_BIT(ETM_ENABLE) |
|
|
SCU_PTSGCR_GEN_BIT(PTSG_ENABLE));
|
|
writel(port_task_scheduler_value,
|
|
&ihost->scu_registers->peg0.ptsg.control);
|
|
}
|
|
|
|
static void sci_controller_assign_task_entries(struct isci_host *ihost)
|
|
{
|
|
u32 task_assignment;
|
|
|
|
/*
|
|
* Assign all the TCs to function 0
|
|
* TODO: Do we actually need to read this register to write it back?
|
|
*/
|
|
|
|
task_assignment =
|
|
readl(&ihost->smu_registers->task_context_assignment[0]);
|
|
|
|
task_assignment |= (SMU_TCA_GEN_VAL(STARTING, 0)) |
|
|
(SMU_TCA_GEN_VAL(ENDING, ihost->task_context_entries - 1)) |
|
|
(SMU_TCA_GEN_BIT(RANGE_CHECK_ENABLE));
|
|
|
|
writel(task_assignment,
|
|
&ihost->smu_registers->task_context_assignment[0]);
|
|
|
|
}
|
|
|
|
static void sci_controller_initialize_completion_queue(struct isci_host *ihost)
|
|
{
|
|
u32 index;
|
|
u32 completion_queue_control_value;
|
|
u32 completion_queue_get_value;
|
|
u32 completion_queue_put_value;
|
|
|
|
ihost->completion_queue_get = 0;
|
|
|
|
completion_queue_control_value =
|
|
(SMU_CQC_QUEUE_LIMIT_SET(SCU_MAX_COMPLETION_QUEUE_ENTRIES - 1) |
|
|
SMU_CQC_EVENT_LIMIT_SET(SCU_MAX_EVENTS - 1));
|
|
|
|
writel(completion_queue_control_value,
|
|
&ihost->smu_registers->completion_queue_control);
|
|
|
|
|
|
/* Set the completion queue get pointer and enable the queue */
|
|
completion_queue_get_value = (
|
|
(SMU_CQGR_GEN_VAL(POINTER, 0))
|
|
| (SMU_CQGR_GEN_VAL(EVENT_POINTER, 0))
|
|
| (SMU_CQGR_GEN_BIT(ENABLE))
|
|
| (SMU_CQGR_GEN_BIT(EVENT_ENABLE))
|
|
);
|
|
|
|
writel(completion_queue_get_value,
|
|
&ihost->smu_registers->completion_queue_get);
|
|
|
|
/* Set the completion queue put pointer */
|
|
completion_queue_put_value = (
|
|
(SMU_CQPR_GEN_VAL(POINTER, 0))
|
|
| (SMU_CQPR_GEN_VAL(EVENT_POINTER, 0))
|
|
);
|
|
|
|
writel(completion_queue_put_value,
|
|
&ihost->smu_registers->completion_queue_put);
|
|
|
|
/* Initialize the cycle bit of the completion queue entries */
|
|
for (index = 0; index < SCU_MAX_COMPLETION_QUEUE_ENTRIES; index++) {
|
|
/*
|
|
* If get.cycle_bit != completion_queue.cycle_bit
|
|
* its not a valid completion queue entry
|
|
* so at system start all entries are invalid */
|
|
ihost->completion_queue[index] = 0x80000000;
|
|
}
|
|
}
|
|
|
|
static void sci_controller_initialize_unsolicited_frame_queue(struct isci_host *ihost)
|
|
{
|
|
u32 frame_queue_control_value;
|
|
u32 frame_queue_get_value;
|
|
u32 frame_queue_put_value;
|
|
|
|
/* Write the queue size */
|
|
frame_queue_control_value =
|
|
SCU_UFQC_GEN_VAL(QUEUE_SIZE, SCU_MAX_UNSOLICITED_FRAMES);
|
|
|
|
writel(frame_queue_control_value,
|
|
&ihost->scu_registers->sdma.unsolicited_frame_queue_control);
|
|
|
|
/* Setup the get pointer for the unsolicited frame queue */
|
|
frame_queue_get_value = (
|
|
SCU_UFQGP_GEN_VAL(POINTER, 0)
|
|
| SCU_UFQGP_GEN_BIT(ENABLE_BIT)
|
|
);
|
|
|
|
writel(frame_queue_get_value,
|
|
&ihost->scu_registers->sdma.unsolicited_frame_get_pointer);
|
|
/* Setup the put pointer for the unsolicited frame queue */
|
|
frame_queue_put_value = SCU_UFQPP_GEN_VAL(POINTER, 0);
|
|
writel(frame_queue_put_value,
|
|
&ihost->scu_registers->sdma.unsolicited_frame_put_pointer);
|
|
}
|
|
|
|
static void sci_controller_transition_to_ready(struct isci_host *ihost, enum sci_status status)
|
|
{
|
|
if (ihost->sm.current_state_id == SCIC_STARTING) {
|
|
/*
|
|
* We move into the ready state, because some of the phys/ports
|
|
* may be up and operational.
|
|
*/
|
|
sci_change_state(&ihost->sm, SCIC_READY);
|
|
|
|
isci_host_start_complete(ihost, status);
|
|
}
|
|
}
|
|
|
|
static bool is_phy_starting(struct isci_phy *iphy)
|
|
{
|
|
enum sci_phy_states state;
|
|
|
|
state = iphy->sm.current_state_id;
|
|
switch (state) {
|
|
case SCI_PHY_STARTING:
|
|
case SCI_PHY_SUB_INITIAL:
|
|
case SCI_PHY_SUB_AWAIT_SAS_SPEED_EN:
|
|
case SCI_PHY_SUB_AWAIT_IAF_UF:
|
|
case SCI_PHY_SUB_AWAIT_SAS_POWER:
|
|
case SCI_PHY_SUB_AWAIT_SATA_POWER:
|
|
case SCI_PHY_SUB_AWAIT_SATA_PHY_EN:
|
|
case SCI_PHY_SUB_AWAIT_SATA_SPEED_EN:
|
|
case SCI_PHY_SUB_AWAIT_SIG_FIS_UF:
|
|
case SCI_PHY_SUB_FINAL:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* sci_controller_start_next_phy - start phy
|
|
* @scic: controller
|
|
*
|
|
* If all the phys have been started, then attempt to transition the
|
|
* controller to the READY state and inform the user
|
|
* (sci_cb_controller_start_complete()).
|
|
*/
|
|
static enum sci_status sci_controller_start_next_phy(struct isci_host *ihost)
|
|
{
|
|
struct sci_oem_params *oem = &ihost->oem_parameters;
|
|
struct isci_phy *iphy;
|
|
enum sci_status status;
|
|
|
|
status = SCI_SUCCESS;
|
|
|
|
if (ihost->phy_startup_timer_pending)
|
|
return status;
|
|
|
|
if (ihost->next_phy_to_start >= SCI_MAX_PHYS) {
|
|
bool is_controller_start_complete = true;
|
|
u32 state;
|
|
u8 index;
|
|
|
|
for (index = 0; index < SCI_MAX_PHYS; index++) {
|
|
iphy = &ihost->phys[index];
|
|
state = iphy->sm.current_state_id;
|
|
|
|
if (!phy_get_non_dummy_port(iphy))
|
|
continue;
|
|
|
|
/* The controller start operation is complete iff:
|
|
* - all links have been given an opportunity to start
|
|
* - have no indication of a connected device
|
|
* - have an indication of a connected device and it has
|
|
* finished the link training process.
|
|
*/
|
|
if ((iphy->is_in_link_training == false && state == SCI_PHY_INITIAL) ||
|
|
(iphy->is_in_link_training == false && state == SCI_PHY_STOPPED) ||
|
|
(iphy->is_in_link_training == true && is_phy_starting(iphy))) {
|
|
is_controller_start_complete = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The controller has successfully finished the start process.
|
|
* Inform the SCI Core user and transition to the READY state. */
|
|
if (is_controller_start_complete == true) {
|
|
sci_controller_transition_to_ready(ihost, SCI_SUCCESS);
|
|
sci_del_timer(&ihost->phy_timer);
|
|
ihost->phy_startup_timer_pending = false;
|
|
}
|
|
} else {
|
|
iphy = &ihost->phys[ihost->next_phy_to_start];
|
|
|
|
if (oem->controller.mode_type == SCIC_PORT_MANUAL_CONFIGURATION_MODE) {
|
|
if (phy_get_non_dummy_port(iphy) == NULL) {
|
|
ihost->next_phy_to_start++;
|
|
|
|
/* Caution recursion ahead be forwarned
|
|
*
|
|
* The PHY was never added to a PORT in MPC mode
|
|
* so start the next phy in sequence This phy
|
|
* will never go link up and will not draw power
|
|
* the OEM parameters either configured the phy
|
|
* incorrectly for the PORT or it was never
|
|
* assigned to a PORT
|
|
*/
|
|
return sci_controller_start_next_phy(ihost);
|
|
}
|
|
}
|
|
|
|
status = sci_phy_start(iphy);
|
|
|
|
if (status == SCI_SUCCESS) {
|
|
sci_mod_timer(&ihost->phy_timer,
|
|
SCIC_SDS_CONTROLLER_PHY_START_TIMEOUT);
|
|
ihost->phy_startup_timer_pending = true;
|
|
} else {
|
|
dev_warn(&ihost->pdev->dev,
|
|
"%s: Controller stop operation failed "
|
|
"to stop phy %d because of status "
|
|
"%d.\n",
|
|
__func__,
|
|
ihost->phys[ihost->next_phy_to_start].phy_index,
|
|
status);
|
|
}
|
|
|
|
ihost->next_phy_to_start++;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
static void phy_startup_timeout(unsigned long data)
|
|
{
|
|
struct sci_timer *tmr = (struct sci_timer *)data;
|
|
struct isci_host *ihost = container_of(tmr, typeof(*ihost), phy_timer);
|
|
unsigned long flags;
|
|
enum sci_status status;
|
|
|
|
spin_lock_irqsave(&ihost->scic_lock, flags);
|
|
|
|
if (tmr->cancel)
|
|
goto done;
|
|
|
|
ihost->phy_startup_timer_pending = false;
|
|
|
|
do {
|
|
status = sci_controller_start_next_phy(ihost);
|
|
} while (status != SCI_SUCCESS);
|
|
|
|
done:
|
|
spin_unlock_irqrestore(&ihost->scic_lock, flags);
|
|
}
|
|
|
|
static u16 isci_tci_active(struct isci_host *ihost)
|
|
{
|
|
return CIRC_CNT(ihost->tci_head, ihost->tci_tail, SCI_MAX_IO_REQUESTS);
|
|
}
|
|
|
|
static enum sci_status sci_controller_start(struct isci_host *ihost,
|
|
u32 timeout)
|
|
{
|
|
enum sci_status result;
|
|
u16 index;
|
|
|
|
if (ihost->sm.current_state_id != SCIC_INITIALIZED) {
|
|
dev_warn(&ihost->pdev->dev,
|
|
"SCIC Controller start operation requested in "
|
|
"invalid state\n");
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
|
|
/* Build the TCi free pool */
|
|
BUILD_BUG_ON(SCI_MAX_IO_REQUESTS > 1 << sizeof(ihost->tci_pool[0]) * 8);
|
|
ihost->tci_head = 0;
|
|
ihost->tci_tail = 0;
|
|
for (index = 0; index < ihost->task_context_entries; index++)
|
|
isci_tci_free(ihost, index);
|
|
|
|
/* Build the RNi free pool */
|
|
sci_remote_node_table_initialize(&ihost->available_remote_nodes,
|
|
ihost->remote_node_entries);
|
|
|
|
/*
|
|
* Before anything else lets make sure we will not be
|
|
* interrupted by the hardware.
|
|
*/
|
|
sci_controller_disable_interrupts(ihost);
|
|
|
|
/* Enable the port task scheduler */
|
|
sci_controller_enable_port_task_scheduler(ihost);
|
|
|
|
/* Assign all the task entries to ihost physical function */
|
|
sci_controller_assign_task_entries(ihost);
|
|
|
|
/* Now initialize the completion queue */
|
|
sci_controller_initialize_completion_queue(ihost);
|
|
|
|
/* Initialize the unsolicited frame queue for use */
|
|
sci_controller_initialize_unsolicited_frame_queue(ihost);
|
|
|
|
/* Start all of the ports on this controller */
|
|
for (index = 0; index < ihost->logical_port_entries; index++) {
|
|
struct isci_port *iport = &ihost->ports[index];
|
|
|
|
result = sci_port_start(iport);
|
|
if (result)
|
|
return result;
|
|
}
|
|
|
|
sci_controller_start_next_phy(ihost);
|
|
|
|
sci_mod_timer(&ihost->timer, timeout);
|
|
|
|
sci_change_state(&ihost->sm, SCIC_STARTING);
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
void isci_host_scan_start(struct Scsi_Host *shost)
|
|
{
|
|
struct isci_host *ihost = SHOST_TO_SAS_HA(shost)->lldd_ha;
|
|
unsigned long tmo = sci_controller_get_suggested_start_timeout(ihost);
|
|
|
|
set_bit(IHOST_START_PENDING, &ihost->flags);
|
|
|
|
spin_lock_irq(&ihost->scic_lock);
|
|
sci_controller_start(ihost, tmo);
|
|
sci_controller_enable_interrupts(ihost);
|
|
spin_unlock_irq(&ihost->scic_lock);
|
|
}
|
|
|
|
static void isci_host_stop_complete(struct isci_host *ihost, enum sci_status completion_status)
|
|
{
|
|
isci_host_change_state(ihost, isci_stopped);
|
|
sci_controller_disable_interrupts(ihost);
|
|
clear_bit(IHOST_STOP_PENDING, &ihost->flags);
|
|
wake_up(&ihost->eventq);
|
|
}
|
|
|
|
static void sci_controller_completion_handler(struct isci_host *ihost)
|
|
{
|
|
/* Empty out the completion queue */
|
|
if (sci_controller_completion_queue_has_entries(ihost))
|
|
sci_controller_process_completions(ihost);
|
|
|
|
/* Clear the interrupt and enable all interrupts again */
|
|
writel(SMU_ISR_COMPLETION, &ihost->smu_registers->interrupt_status);
|
|
/* Could we write the value of SMU_ISR_COMPLETION? */
|
|
writel(0xFF000000, &ihost->smu_registers->interrupt_mask);
|
|
writel(0, &ihost->smu_registers->interrupt_mask);
|
|
}
|
|
|
|
/**
|
|
* isci_host_completion_routine() - This function is the delayed service
|
|
* routine that calls the sci core library's completion handler. It's
|
|
* scheduled as a tasklet from the interrupt service routine when interrupts
|
|
* in use, or set as the timeout function in polled mode.
|
|
* @data: This parameter specifies the ISCI host object
|
|
*
|
|
*/
|
|
static void isci_host_completion_routine(unsigned long data)
|
|
{
|
|
struct isci_host *ihost = (struct isci_host *)data;
|
|
struct list_head completed_request_list;
|
|
struct list_head errored_request_list;
|
|
struct list_head *current_position;
|
|
struct list_head *next_position;
|
|
struct isci_request *request;
|
|
struct isci_request *next_request;
|
|
struct sas_task *task;
|
|
|
|
INIT_LIST_HEAD(&completed_request_list);
|
|
INIT_LIST_HEAD(&errored_request_list);
|
|
|
|
spin_lock_irq(&ihost->scic_lock);
|
|
|
|
sci_controller_completion_handler(ihost);
|
|
|
|
/* Take the lists of completed I/Os from the host. */
|
|
|
|
list_splice_init(&ihost->requests_to_complete,
|
|
&completed_request_list);
|
|
|
|
/* Take the list of errored I/Os from the host. */
|
|
list_splice_init(&ihost->requests_to_errorback,
|
|
&errored_request_list);
|
|
|
|
spin_unlock_irq(&ihost->scic_lock);
|
|
|
|
/* Process any completions in the lists. */
|
|
list_for_each_safe(current_position, next_position,
|
|
&completed_request_list) {
|
|
|
|
request = list_entry(current_position, struct isci_request,
|
|
completed_node);
|
|
task = isci_request_access_task(request);
|
|
|
|
/* Normal notification (task_done) */
|
|
dev_dbg(&ihost->pdev->dev,
|
|
"%s: Normal - request/task = %p/%p\n",
|
|
__func__,
|
|
request,
|
|
task);
|
|
|
|
/* Return the task to libsas */
|
|
if (task != NULL) {
|
|
|
|
task->lldd_task = NULL;
|
|
if (!(task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
|
|
|
|
/* If the task is already in the abort path,
|
|
* the task_done callback cannot be called.
|
|
*/
|
|
task->task_done(task);
|
|
}
|
|
}
|
|
|
|
spin_lock_irq(&ihost->scic_lock);
|
|
isci_free_tag(ihost, request->io_tag);
|
|
spin_unlock_irq(&ihost->scic_lock);
|
|
}
|
|
list_for_each_entry_safe(request, next_request, &errored_request_list,
|
|
completed_node) {
|
|
|
|
task = isci_request_access_task(request);
|
|
|
|
/* Use sas_task_abort */
|
|
dev_warn(&ihost->pdev->dev,
|
|
"%s: Error - request/task = %p/%p\n",
|
|
__func__,
|
|
request,
|
|
task);
|
|
|
|
if (task != NULL) {
|
|
|
|
/* Put the task into the abort path if it's not there
|
|
* already.
|
|
*/
|
|
if (!(task->task_state_flags & SAS_TASK_STATE_ABORTED))
|
|
sas_task_abort(task);
|
|
|
|
} else {
|
|
/* This is a case where the request has completed with a
|
|
* status such that it needed further target servicing,
|
|
* but the sas_task reference has already been removed
|
|
* from the request. Since it was errored, it was not
|
|
* being aborted, so there is nothing to do except free
|
|
* it.
|
|
*/
|
|
|
|
spin_lock_irq(&ihost->scic_lock);
|
|
/* Remove the request from the remote device's list
|
|
* of pending requests.
|
|
*/
|
|
list_del_init(&request->dev_node);
|
|
isci_free_tag(ihost, request->io_tag);
|
|
spin_unlock_irq(&ihost->scic_lock);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* sci_controller_stop() - This method will stop an individual controller
|
|
* object.This method will invoke the associated user callback upon
|
|
* completion. The completion callback is called when the following
|
|
* conditions are met: -# the method return status is SCI_SUCCESS. -# the
|
|
* controller has been quiesced. This method will ensure that all IO
|
|
* requests are quiesced, phys are stopped, and all additional operation by
|
|
* the hardware is halted.
|
|
* @controller: the handle to the controller object to stop.
|
|
* @timeout: This parameter specifies the number of milliseconds in which the
|
|
* stop operation should complete.
|
|
*
|
|
* The controller must be in the STARTED or STOPPED state. Indicate if the
|
|
* controller stop method succeeded or failed in some way. SCI_SUCCESS if the
|
|
* stop operation successfully began. SCI_WARNING_ALREADY_IN_STATE if the
|
|
* controller is already in the STOPPED state. SCI_FAILURE_INVALID_STATE if the
|
|
* controller is not either in the STARTED or STOPPED states.
|
|
*/
|
|
static enum sci_status sci_controller_stop(struct isci_host *ihost, u32 timeout)
|
|
{
|
|
if (ihost->sm.current_state_id != SCIC_READY) {
|
|
dev_warn(&ihost->pdev->dev,
|
|
"SCIC Controller stop operation requested in "
|
|
"invalid state\n");
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
|
|
sci_mod_timer(&ihost->timer, timeout);
|
|
sci_change_state(&ihost->sm, SCIC_STOPPING);
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* sci_controller_reset() - This method will reset the supplied core
|
|
* controller regardless of the state of said controller. This operation is
|
|
* considered destructive. In other words, all current operations are wiped
|
|
* out. No IO completions for outstanding devices occur. Outstanding IO
|
|
* requests are not aborted or completed at the actual remote device.
|
|
* @controller: the handle to the controller object to reset.
|
|
*
|
|
* Indicate if the controller reset method succeeded or failed in some way.
|
|
* SCI_SUCCESS if the reset operation successfully started. SCI_FATAL_ERROR if
|
|
* the controller reset operation is unable to complete.
|
|
*/
|
|
static enum sci_status sci_controller_reset(struct isci_host *ihost)
|
|
{
|
|
switch (ihost->sm.current_state_id) {
|
|
case SCIC_RESET:
|
|
case SCIC_READY:
|
|
case SCIC_STOPPED:
|
|
case SCIC_FAILED:
|
|
/*
|
|
* The reset operation is not a graceful cleanup, just
|
|
* perform the state transition.
|
|
*/
|
|
sci_change_state(&ihost->sm, SCIC_RESETTING);
|
|
return SCI_SUCCESS;
|
|
default:
|
|
dev_warn(&ihost->pdev->dev,
|
|
"SCIC Controller reset operation requested in "
|
|
"invalid state\n");
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
}
|
|
|
|
void isci_host_deinit(struct isci_host *ihost)
|
|
{
|
|
int i;
|
|
|
|
isci_host_change_state(ihost, isci_stopping);
|
|
for (i = 0; i < SCI_MAX_PORTS; i++) {
|
|
struct isci_port *iport = &ihost->ports[i];
|
|
struct isci_remote_device *idev, *d;
|
|
|
|
list_for_each_entry_safe(idev, d, &iport->remote_dev_list, node) {
|
|
if (test_bit(IDEV_ALLOCATED, &idev->flags))
|
|
isci_remote_device_stop(ihost, idev);
|
|
}
|
|
}
|
|
|
|
set_bit(IHOST_STOP_PENDING, &ihost->flags);
|
|
|
|
spin_lock_irq(&ihost->scic_lock);
|
|
sci_controller_stop(ihost, SCIC_CONTROLLER_STOP_TIMEOUT);
|
|
spin_unlock_irq(&ihost->scic_lock);
|
|
|
|
wait_for_stop(ihost);
|
|
sci_controller_reset(ihost);
|
|
|
|
/* Cancel any/all outstanding port timers */
|
|
for (i = 0; i < ihost->logical_port_entries; i++) {
|
|
struct isci_port *iport = &ihost->ports[i];
|
|
del_timer_sync(&iport->timer.timer);
|
|
}
|
|
|
|
/* Cancel any/all outstanding phy timers */
|
|
for (i = 0; i < SCI_MAX_PHYS; i++) {
|
|
struct isci_phy *iphy = &ihost->phys[i];
|
|
del_timer_sync(&iphy->sata_timer.timer);
|
|
}
|
|
|
|
del_timer_sync(&ihost->port_agent.timer.timer);
|
|
|
|
del_timer_sync(&ihost->power_control.timer.timer);
|
|
|
|
del_timer_sync(&ihost->timer.timer);
|
|
|
|
del_timer_sync(&ihost->phy_timer.timer);
|
|
}
|
|
|
|
static void __iomem *scu_base(struct isci_host *isci_host)
|
|
{
|
|
struct pci_dev *pdev = isci_host->pdev;
|
|
int id = isci_host->id;
|
|
|
|
return pcim_iomap_table(pdev)[SCI_SCU_BAR * 2] + SCI_SCU_BAR_SIZE * id;
|
|
}
|
|
|
|
static void __iomem *smu_base(struct isci_host *isci_host)
|
|
{
|
|
struct pci_dev *pdev = isci_host->pdev;
|
|
int id = isci_host->id;
|
|
|
|
return pcim_iomap_table(pdev)[SCI_SMU_BAR * 2] + SCI_SMU_BAR_SIZE * id;
|
|
}
|
|
|
|
static void isci_user_parameters_get(struct sci_user_parameters *u)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < SCI_MAX_PHYS; i++) {
|
|
struct sci_phy_user_params *u_phy = &u->phys[i];
|
|
|
|
u_phy->max_speed_generation = phy_gen;
|
|
|
|
/* we are not exporting these for now */
|
|
u_phy->align_insertion_frequency = 0x7f;
|
|
u_phy->in_connection_align_insertion_frequency = 0xff;
|
|
u_phy->notify_enable_spin_up_insertion_frequency = 0x33;
|
|
}
|
|
|
|
u->stp_inactivity_timeout = stp_inactive_to;
|
|
u->ssp_inactivity_timeout = ssp_inactive_to;
|
|
u->stp_max_occupancy_timeout = stp_max_occ_to;
|
|
u->ssp_max_occupancy_timeout = ssp_max_occ_to;
|
|
u->no_outbound_task_timeout = no_outbound_task_to;
|
|
u->max_number_concurrent_device_spin_up = max_concurr_spinup;
|
|
}
|
|
|
|
static void sci_controller_initial_state_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_host *ihost = container_of(sm, typeof(*ihost), sm);
|
|
|
|
sci_change_state(&ihost->sm, SCIC_RESET);
|
|
}
|
|
|
|
static inline void sci_controller_starting_state_exit(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_host *ihost = container_of(sm, typeof(*ihost), sm);
|
|
|
|
sci_del_timer(&ihost->timer);
|
|
}
|
|
|
|
#define INTERRUPT_COALESCE_TIMEOUT_BASE_RANGE_LOWER_BOUND_NS 853
|
|
#define INTERRUPT_COALESCE_TIMEOUT_BASE_RANGE_UPPER_BOUND_NS 1280
|
|
#define INTERRUPT_COALESCE_TIMEOUT_MAX_US 2700000
|
|
#define INTERRUPT_COALESCE_NUMBER_MAX 256
|
|
#define INTERRUPT_COALESCE_TIMEOUT_ENCODE_MIN 7
|
|
#define INTERRUPT_COALESCE_TIMEOUT_ENCODE_MAX 28
|
|
|
|
/**
|
|
* sci_controller_set_interrupt_coalescence() - This method allows the user to
|
|
* configure the interrupt coalescence.
|
|
* @controller: This parameter represents the handle to the controller object
|
|
* for which its interrupt coalesce register is overridden.
|
|
* @coalesce_number: Used to control the number of entries in the Completion
|
|
* Queue before an interrupt is generated. If the number of entries exceed
|
|
* this number, an interrupt will be generated. The valid range of the input
|
|
* is [0, 256]. A setting of 0 results in coalescing being disabled.
|
|
* @coalesce_timeout: Timeout value in microseconds. The valid range of the
|
|
* input is [0, 2700000] . A setting of 0 is allowed and results in no
|
|
* interrupt coalescing timeout.
|
|
*
|
|
* Indicate if the user successfully set the interrupt coalesce parameters.
|
|
* SCI_SUCCESS The user successfully updated the interrutp coalescence.
|
|
* SCI_FAILURE_INVALID_PARAMETER_VALUE The user input value is out of range.
|
|
*/
|
|
static enum sci_status
|
|
sci_controller_set_interrupt_coalescence(struct isci_host *ihost,
|
|
u32 coalesce_number,
|
|
u32 coalesce_timeout)
|
|
{
|
|
u8 timeout_encode = 0;
|
|
u32 min = 0;
|
|
u32 max = 0;
|
|
|
|
/* Check if the input parameters fall in the range. */
|
|
if (coalesce_number > INTERRUPT_COALESCE_NUMBER_MAX)
|
|
return SCI_FAILURE_INVALID_PARAMETER_VALUE;
|
|
|
|
/*
|
|
* Defined encoding for interrupt coalescing timeout:
|
|
* Value Min Max Units
|
|
* ----- --- --- -----
|
|
* 0 - - Disabled
|
|
* 1 13.3 20.0 ns
|
|
* 2 26.7 40.0
|
|
* 3 53.3 80.0
|
|
* 4 106.7 160.0
|
|
* 5 213.3 320.0
|
|
* 6 426.7 640.0
|
|
* 7 853.3 1280.0
|
|
* 8 1.7 2.6 us
|
|
* 9 3.4 5.1
|
|
* 10 6.8 10.2
|
|
* 11 13.7 20.5
|
|
* 12 27.3 41.0
|
|
* 13 54.6 81.9
|
|
* 14 109.2 163.8
|
|
* 15 218.5 327.7
|
|
* 16 436.9 655.4
|
|
* 17 873.8 1310.7
|
|
* 18 1.7 2.6 ms
|
|
* 19 3.5 5.2
|
|
* 20 7.0 10.5
|
|
* 21 14.0 21.0
|
|
* 22 28.0 41.9
|
|
* 23 55.9 83.9
|
|
* 24 111.8 167.8
|
|
* 25 223.7 335.5
|
|
* 26 447.4 671.1
|
|
* 27 894.8 1342.2
|
|
* 28 1.8 2.7 s
|
|
* Others Undefined */
|
|
|
|
/*
|
|
* Use the table above to decide the encode of interrupt coalescing timeout
|
|
* value for register writing. */
|
|
if (coalesce_timeout == 0)
|
|
timeout_encode = 0;
|
|
else{
|
|
/* make the timeout value in unit of (10 ns). */
|
|
coalesce_timeout = coalesce_timeout * 100;
|
|
min = INTERRUPT_COALESCE_TIMEOUT_BASE_RANGE_LOWER_BOUND_NS / 10;
|
|
max = INTERRUPT_COALESCE_TIMEOUT_BASE_RANGE_UPPER_BOUND_NS / 10;
|
|
|
|
/* get the encode of timeout for register writing. */
|
|
for (timeout_encode = INTERRUPT_COALESCE_TIMEOUT_ENCODE_MIN;
|
|
timeout_encode <= INTERRUPT_COALESCE_TIMEOUT_ENCODE_MAX;
|
|
timeout_encode++) {
|
|
if (min <= coalesce_timeout && max > coalesce_timeout)
|
|
break;
|
|
else if (coalesce_timeout >= max && coalesce_timeout < min * 2
|
|
&& coalesce_timeout <= INTERRUPT_COALESCE_TIMEOUT_MAX_US * 100) {
|
|
if ((coalesce_timeout - max) < (2 * min - coalesce_timeout))
|
|
break;
|
|
else{
|
|
timeout_encode++;
|
|
break;
|
|
}
|
|
} else {
|
|
max = max * 2;
|
|
min = min * 2;
|
|
}
|
|
}
|
|
|
|
if (timeout_encode == INTERRUPT_COALESCE_TIMEOUT_ENCODE_MAX + 1)
|
|
/* the value is out of range. */
|
|
return SCI_FAILURE_INVALID_PARAMETER_VALUE;
|
|
}
|
|
|
|
writel(SMU_ICC_GEN_VAL(NUMBER, coalesce_number) |
|
|
SMU_ICC_GEN_VAL(TIMER, timeout_encode),
|
|
&ihost->smu_registers->interrupt_coalesce_control);
|
|
|
|
|
|
ihost->interrupt_coalesce_number = (u16)coalesce_number;
|
|
ihost->interrupt_coalesce_timeout = coalesce_timeout / 100;
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
|
|
static void sci_controller_ready_state_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_host *ihost = container_of(sm, typeof(*ihost), sm);
|
|
|
|
/* set the default interrupt coalescence number and timeout value. */
|
|
sci_controller_set_interrupt_coalescence(ihost, 0x10, 250);
|
|
}
|
|
|
|
static void sci_controller_ready_state_exit(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_host *ihost = container_of(sm, typeof(*ihost), sm);
|
|
|
|
/* disable interrupt coalescence. */
|
|
sci_controller_set_interrupt_coalescence(ihost, 0, 0);
|
|
}
|
|
|
|
static enum sci_status sci_controller_stop_phys(struct isci_host *ihost)
|
|
{
|
|
u32 index;
|
|
enum sci_status status;
|
|
enum sci_status phy_status;
|
|
|
|
status = SCI_SUCCESS;
|
|
|
|
for (index = 0; index < SCI_MAX_PHYS; index++) {
|
|
phy_status = sci_phy_stop(&ihost->phys[index]);
|
|
|
|
if (phy_status != SCI_SUCCESS &&
|
|
phy_status != SCI_FAILURE_INVALID_STATE) {
|
|
status = SCI_FAILURE;
|
|
|
|
dev_warn(&ihost->pdev->dev,
|
|
"%s: Controller stop operation failed to stop "
|
|
"phy %d because of status %d.\n",
|
|
__func__,
|
|
ihost->phys[index].phy_index, phy_status);
|
|
}
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
static enum sci_status sci_controller_stop_ports(struct isci_host *ihost)
|
|
{
|
|
u32 index;
|
|
enum sci_status port_status;
|
|
enum sci_status status = SCI_SUCCESS;
|
|
|
|
for (index = 0; index < ihost->logical_port_entries; index++) {
|
|
struct isci_port *iport = &ihost->ports[index];
|
|
|
|
port_status = sci_port_stop(iport);
|
|
|
|
if ((port_status != SCI_SUCCESS) &&
|
|
(port_status != SCI_FAILURE_INVALID_STATE)) {
|
|
status = SCI_FAILURE;
|
|
|
|
dev_warn(&ihost->pdev->dev,
|
|
"%s: Controller stop operation failed to "
|
|
"stop port %d because of status %d.\n",
|
|
__func__,
|
|
iport->logical_port_index,
|
|
port_status);
|
|
}
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
static enum sci_status sci_controller_stop_devices(struct isci_host *ihost)
|
|
{
|
|
u32 index;
|
|
enum sci_status status;
|
|
enum sci_status device_status;
|
|
|
|
status = SCI_SUCCESS;
|
|
|
|
for (index = 0; index < ihost->remote_node_entries; index++) {
|
|
if (ihost->device_table[index] != NULL) {
|
|
/* / @todo What timeout value do we want to provide to this request? */
|
|
device_status = sci_remote_device_stop(ihost->device_table[index], 0);
|
|
|
|
if ((device_status != SCI_SUCCESS) &&
|
|
(device_status != SCI_FAILURE_INVALID_STATE)) {
|
|
dev_warn(&ihost->pdev->dev,
|
|
"%s: Controller stop operation failed "
|
|
"to stop device 0x%p because of "
|
|
"status %d.\n",
|
|
__func__,
|
|
ihost->device_table[index], device_status);
|
|
}
|
|
}
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
static void sci_controller_stopping_state_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_host *ihost = container_of(sm, typeof(*ihost), sm);
|
|
|
|
/* Stop all of the components for this controller */
|
|
sci_controller_stop_phys(ihost);
|
|
sci_controller_stop_ports(ihost);
|
|
sci_controller_stop_devices(ihost);
|
|
}
|
|
|
|
static void sci_controller_stopping_state_exit(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_host *ihost = container_of(sm, typeof(*ihost), sm);
|
|
|
|
sci_del_timer(&ihost->timer);
|
|
}
|
|
|
|
static void sci_controller_reset_hardware(struct isci_host *ihost)
|
|
{
|
|
/* Disable interrupts so we dont take any spurious interrupts */
|
|
sci_controller_disable_interrupts(ihost);
|
|
|
|
/* Reset the SCU */
|
|
writel(0xFFFFFFFF, &ihost->smu_registers->soft_reset_control);
|
|
|
|
/* Delay for 1ms to before clearing the CQP and UFQPR. */
|
|
udelay(1000);
|
|
|
|
/* The write to the CQGR clears the CQP */
|
|
writel(0x00000000, &ihost->smu_registers->completion_queue_get);
|
|
|
|
/* The write to the UFQGP clears the UFQPR */
|
|
writel(0, &ihost->scu_registers->sdma.unsolicited_frame_get_pointer);
|
|
}
|
|
|
|
static void sci_controller_resetting_state_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_host *ihost = container_of(sm, typeof(*ihost), sm);
|
|
|
|
sci_controller_reset_hardware(ihost);
|
|
sci_change_state(&ihost->sm, SCIC_RESET);
|
|
}
|
|
|
|
static const struct sci_base_state sci_controller_state_table[] = {
|
|
[SCIC_INITIAL] = {
|
|
.enter_state = sci_controller_initial_state_enter,
|
|
},
|
|
[SCIC_RESET] = {},
|
|
[SCIC_INITIALIZING] = {},
|
|
[SCIC_INITIALIZED] = {},
|
|
[SCIC_STARTING] = {
|
|
.exit_state = sci_controller_starting_state_exit,
|
|
},
|
|
[SCIC_READY] = {
|
|
.enter_state = sci_controller_ready_state_enter,
|
|
.exit_state = sci_controller_ready_state_exit,
|
|
},
|
|
[SCIC_RESETTING] = {
|
|
.enter_state = sci_controller_resetting_state_enter,
|
|
},
|
|
[SCIC_STOPPING] = {
|
|
.enter_state = sci_controller_stopping_state_enter,
|
|
.exit_state = sci_controller_stopping_state_exit,
|
|
},
|
|
[SCIC_STOPPED] = {},
|
|
[SCIC_FAILED] = {}
|
|
};
|
|
|
|
static void sci_controller_set_default_config_parameters(struct isci_host *ihost)
|
|
{
|
|
/* these defaults are overridden by the platform / firmware */
|
|
u16 index;
|
|
|
|
/* Default to APC mode. */
|
|
ihost->oem_parameters.controller.mode_type = SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE;
|
|
|
|
/* Default to APC mode. */
|
|
ihost->oem_parameters.controller.max_concurrent_dev_spin_up = 1;
|
|
|
|
/* Default to no SSC operation. */
|
|
ihost->oem_parameters.controller.do_enable_ssc = false;
|
|
|
|
/* Initialize all of the port parameter information to narrow ports. */
|
|
for (index = 0; index < SCI_MAX_PORTS; index++) {
|
|
ihost->oem_parameters.ports[index].phy_mask = 0;
|
|
}
|
|
|
|
/* Initialize all of the phy parameter information. */
|
|
for (index = 0; index < SCI_MAX_PHYS; index++) {
|
|
/* Default to 6G (i.e. Gen 3) for now. */
|
|
ihost->user_parameters.phys[index].max_speed_generation = 3;
|
|
|
|
/* the frequencies cannot be 0 */
|
|
ihost->user_parameters.phys[index].align_insertion_frequency = 0x7f;
|
|
ihost->user_parameters.phys[index].in_connection_align_insertion_frequency = 0xff;
|
|
ihost->user_parameters.phys[index].notify_enable_spin_up_insertion_frequency = 0x33;
|
|
|
|
/*
|
|
* Previous Vitesse based expanders had a arbitration issue that
|
|
* is worked around by having the upper 32-bits of SAS address
|
|
* with a value greater then the Vitesse company identifier.
|
|
* Hence, usage of 0x5FCFFFFF. */
|
|
ihost->oem_parameters.phys[index].sas_address.low = 0x1 + ihost->id;
|
|
ihost->oem_parameters.phys[index].sas_address.high = 0x5FCFFFFF;
|
|
}
|
|
|
|
ihost->user_parameters.stp_inactivity_timeout = 5;
|
|
ihost->user_parameters.ssp_inactivity_timeout = 5;
|
|
ihost->user_parameters.stp_max_occupancy_timeout = 5;
|
|
ihost->user_parameters.ssp_max_occupancy_timeout = 20;
|
|
ihost->user_parameters.no_outbound_task_timeout = 20;
|
|
}
|
|
|
|
static void controller_timeout(unsigned long data)
|
|
{
|
|
struct sci_timer *tmr = (struct sci_timer *)data;
|
|
struct isci_host *ihost = container_of(tmr, typeof(*ihost), timer);
|
|
struct sci_base_state_machine *sm = &ihost->sm;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ihost->scic_lock, flags);
|
|
|
|
if (tmr->cancel)
|
|
goto done;
|
|
|
|
if (sm->current_state_id == SCIC_STARTING)
|
|
sci_controller_transition_to_ready(ihost, SCI_FAILURE_TIMEOUT);
|
|
else if (sm->current_state_id == SCIC_STOPPING) {
|
|
sci_change_state(sm, SCIC_FAILED);
|
|
isci_host_stop_complete(ihost, SCI_FAILURE_TIMEOUT);
|
|
} else /* / @todo Now what do we want to do in this case? */
|
|
dev_err(&ihost->pdev->dev,
|
|
"%s: Controller timer fired when controller was not "
|
|
"in a state being timed.\n",
|
|
__func__);
|
|
|
|
done:
|
|
spin_unlock_irqrestore(&ihost->scic_lock, flags);
|
|
}
|
|
|
|
static enum sci_status sci_controller_construct(struct isci_host *ihost,
|
|
void __iomem *scu_base,
|
|
void __iomem *smu_base)
|
|
{
|
|
u8 i;
|
|
|
|
sci_init_sm(&ihost->sm, sci_controller_state_table, SCIC_INITIAL);
|
|
|
|
ihost->scu_registers = scu_base;
|
|
ihost->smu_registers = smu_base;
|
|
|
|
sci_port_configuration_agent_construct(&ihost->port_agent);
|
|
|
|
/* Construct the ports for this controller */
|
|
for (i = 0; i < SCI_MAX_PORTS; i++)
|
|
sci_port_construct(&ihost->ports[i], i, ihost);
|
|
sci_port_construct(&ihost->ports[i], SCIC_SDS_DUMMY_PORT, ihost);
|
|
|
|
/* Construct the phys for this controller */
|
|
for (i = 0; i < SCI_MAX_PHYS; i++) {
|
|
/* Add all the PHYs to the dummy port */
|
|
sci_phy_construct(&ihost->phys[i],
|
|
&ihost->ports[SCI_MAX_PORTS], i);
|
|
}
|
|
|
|
ihost->invalid_phy_mask = 0;
|
|
|
|
sci_init_timer(&ihost->timer, controller_timeout);
|
|
|
|
/* Initialize the User and OEM parameters to default values. */
|
|
sci_controller_set_default_config_parameters(ihost);
|
|
|
|
return sci_controller_reset(ihost);
|
|
}
|
|
|
|
int sci_oem_parameters_validate(struct sci_oem_params *oem)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < SCI_MAX_PORTS; i++)
|
|
if (oem->ports[i].phy_mask > SCIC_SDS_PARM_PHY_MASK_MAX)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < SCI_MAX_PHYS; i++)
|
|
if (oem->phys[i].sas_address.high == 0 &&
|
|
oem->phys[i].sas_address.low == 0)
|
|
return -EINVAL;
|
|
|
|
if (oem->controller.mode_type == SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE) {
|
|
for (i = 0; i < SCI_MAX_PHYS; i++)
|
|
if (oem->ports[i].phy_mask != 0)
|
|
return -EINVAL;
|
|
} else if (oem->controller.mode_type == SCIC_PORT_MANUAL_CONFIGURATION_MODE) {
|
|
u8 phy_mask = 0;
|
|
|
|
for (i = 0; i < SCI_MAX_PHYS; i++)
|
|
phy_mask |= oem->ports[i].phy_mask;
|
|
|
|
if (phy_mask == 0)
|
|
return -EINVAL;
|
|
} else
|
|
return -EINVAL;
|
|
|
|
if (oem->controller.max_concurrent_dev_spin_up > MAX_CONCURRENT_DEVICE_SPIN_UP_COUNT)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum sci_status sci_oem_parameters_set(struct isci_host *ihost)
|
|
{
|
|
u32 state = ihost->sm.current_state_id;
|
|
|
|
if (state == SCIC_RESET ||
|
|
state == SCIC_INITIALIZING ||
|
|
state == SCIC_INITIALIZED) {
|
|
|
|
if (sci_oem_parameters_validate(&ihost->oem_parameters))
|
|
return SCI_FAILURE_INVALID_PARAMETER_VALUE;
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
|
|
static void power_control_timeout(unsigned long data)
|
|
{
|
|
struct sci_timer *tmr = (struct sci_timer *)data;
|
|
struct isci_host *ihost = container_of(tmr, typeof(*ihost), power_control.timer);
|
|
struct isci_phy *iphy;
|
|
unsigned long flags;
|
|
u8 i;
|
|
|
|
spin_lock_irqsave(&ihost->scic_lock, flags);
|
|
|
|
if (tmr->cancel)
|
|
goto done;
|
|
|
|
ihost->power_control.phys_granted_power = 0;
|
|
|
|
if (ihost->power_control.phys_waiting == 0) {
|
|
ihost->power_control.timer_started = false;
|
|
goto done;
|
|
}
|
|
|
|
for (i = 0; i < SCI_MAX_PHYS; i++) {
|
|
|
|
if (ihost->power_control.phys_waiting == 0)
|
|
break;
|
|
|
|
iphy = ihost->power_control.requesters[i];
|
|
if (iphy == NULL)
|
|
continue;
|
|
|
|
if (ihost->power_control.phys_granted_power >=
|
|
ihost->oem_parameters.controller.max_concurrent_dev_spin_up)
|
|
break;
|
|
|
|
ihost->power_control.requesters[i] = NULL;
|
|
ihost->power_control.phys_waiting--;
|
|
ihost->power_control.phys_granted_power++;
|
|
sci_phy_consume_power_handler(iphy);
|
|
}
|
|
|
|
/*
|
|
* It doesn't matter if the power list is empty, we need to start the
|
|
* timer in case another phy becomes ready.
|
|
*/
|
|
sci_mod_timer(tmr, SCIC_SDS_CONTROLLER_POWER_CONTROL_INTERVAL);
|
|
ihost->power_control.timer_started = true;
|
|
|
|
done:
|
|
spin_unlock_irqrestore(&ihost->scic_lock, flags);
|
|
}
|
|
|
|
void sci_controller_power_control_queue_insert(struct isci_host *ihost,
|
|
struct isci_phy *iphy)
|
|
{
|
|
BUG_ON(iphy == NULL);
|
|
|
|
if (ihost->power_control.phys_granted_power <
|
|
ihost->oem_parameters.controller.max_concurrent_dev_spin_up) {
|
|
ihost->power_control.phys_granted_power++;
|
|
sci_phy_consume_power_handler(iphy);
|
|
|
|
/*
|
|
* stop and start the power_control timer. When the timer fires, the
|
|
* no_of_phys_granted_power will be set to 0
|
|
*/
|
|
if (ihost->power_control.timer_started)
|
|
sci_del_timer(&ihost->power_control.timer);
|
|
|
|
sci_mod_timer(&ihost->power_control.timer,
|
|
SCIC_SDS_CONTROLLER_POWER_CONTROL_INTERVAL);
|
|
ihost->power_control.timer_started = true;
|
|
|
|
} else {
|
|
/* Add the phy in the waiting list */
|
|
ihost->power_control.requesters[iphy->phy_index] = iphy;
|
|
ihost->power_control.phys_waiting++;
|
|
}
|
|
}
|
|
|
|
void sci_controller_power_control_queue_remove(struct isci_host *ihost,
|
|
struct isci_phy *iphy)
|
|
{
|
|
BUG_ON(iphy == NULL);
|
|
|
|
if (ihost->power_control.requesters[iphy->phy_index])
|
|
ihost->power_control.phys_waiting--;
|
|
|
|
ihost->power_control.requesters[iphy->phy_index] = NULL;
|
|
}
|
|
|
|
#define AFE_REGISTER_WRITE_DELAY 10
|
|
|
|
/* Initialize the AFE for this phy index. We need to read the AFE setup from
|
|
* the OEM parameters
|
|
*/
|
|
static void sci_controller_afe_initialization(struct isci_host *ihost)
|
|
{
|
|
const struct sci_oem_params *oem = &ihost->oem_parameters;
|
|
struct pci_dev *pdev = ihost->pdev;
|
|
u32 afe_status;
|
|
u32 phy_id;
|
|
|
|
/* Clear DFX Status registers */
|
|
writel(0x0081000f, &ihost->scu_registers->afe.afe_dfx_master_control0);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
|
|
if (is_b0(pdev)) {
|
|
/* PM Rx Equalization Save, PM SPhy Rx Acknowledgement
|
|
* Timer, PM Stagger Timer */
|
|
writel(0x0007BFFF, &ihost->scu_registers->afe.afe_pmsn_master_control2);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
}
|
|
|
|
/* Configure bias currents to normal */
|
|
if (is_a2(pdev))
|
|
writel(0x00005A00, &ihost->scu_registers->afe.afe_bias_control);
|
|
else if (is_b0(pdev) || is_c0(pdev))
|
|
writel(0x00005F00, &ihost->scu_registers->afe.afe_bias_control);
|
|
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
|
|
/* Enable PLL */
|
|
if (is_b0(pdev) || is_c0(pdev))
|
|
writel(0x80040A08, &ihost->scu_registers->afe.afe_pll_control0);
|
|
else
|
|
writel(0x80040908, &ihost->scu_registers->afe.afe_pll_control0);
|
|
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
|
|
/* Wait for the PLL to lock */
|
|
do {
|
|
afe_status = readl(&ihost->scu_registers->afe.afe_common_block_status);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
} while ((afe_status & 0x00001000) == 0);
|
|
|
|
if (is_a2(pdev)) {
|
|
/* Shorten SAS SNW lock time (RxLock timer value from 76 us to 50 us) */
|
|
writel(0x7bcc96ad, &ihost->scu_registers->afe.afe_pmsn_master_control0);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
}
|
|
|
|
for (phy_id = 0; phy_id < SCI_MAX_PHYS; phy_id++) {
|
|
const struct sci_phy_oem_params *oem_phy = &oem->phys[phy_id];
|
|
|
|
if (is_b0(pdev)) {
|
|
/* Configure transmitter SSC parameters */
|
|
writel(0x00030000, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_tx_ssc_control);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
} else if (is_c0(pdev)) {
|
|
/* Configure transmitter SSC parameters */
|
|
writel(0x0003000, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_tx_ssc_control);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
|
|
/*
|
|
* All defaults, except the Receive Word Alignament/Comma Detect
|
|
* Enable....(0xe800) */
|
|
writel(0x00004500, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_xcvr_control0);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
} else {
|
|
/*
|
|
* All defaults, except the Receive Word Alignament/Comma Detect
|
|
* Enable....(0xe800) */
|
|
writel(0x00004512, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_xcvr_control0);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
|
|
writel(0x0050100F, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_xcvr_control1);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
}
|
|
|
|
/*
|
|
* Power up TX and RX out from power down (PWRDNTX and PWRDNRX)
|
|
* & increase TX int & ext bias 20%....(0xe85c) */
|
|
if (is_a2(pdev))
|
|
writel(0x000003F0, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_channel_control);
|
|
else if (is_b0(pdev)) {
|
|
/* Power down TX and RX (PWRDNTX and PWRDNRX) */
|
|
writel(0x000003D7, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_channel_control);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
|
|
/*
|
|
* Power up TX and RX out from power down (PWRDNTX and PWRDNRX)
|
|
* & increase TX int & ext bias 20%....(0xe85c) */
|
|
writel(0x000003D4, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_channel_control);
|
|
} else {
|
|
writel(0x000001E7, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_channel_control);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
|
|
/*
|
|
* Power up TX and RX out from power down (PWRDNTX and PWRDNRX)
|
|
* & increase TX int & ext bias 20%....(0xe85c) */
|
|
writel(0x000001E4, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_channel_control);
|
|
}
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
|
|
if (is_a2(pdev)) {
|
|
/* Enable TX equalization (0xe824) */
|
|
writel(0x00040000, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_tx_control);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
}
|
|
|
|
/*
|
|
* RDPI=0x0(RX Power On), RXOOBDETPDNC=0x0, TPD=0x0(TX Power On),
|
|
* RDD=0x0(RX Detect Enabled) ....(0xe800) */
|
|
writel(0x00004100, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_xcvr_control0);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
|
|
/* Leave DFE/FFE on */
|
|
if (is_a2(pdev))
|
|
writel(0x3F11103F, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_rx_ssc_control0);
|
|
else if (is_b0(pdev)) {
|
|
writel(0x3F11103F, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_rx_ssc_control0);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
/* Enable TX equalization (0xe824) */
|
|
writel(0x00040000, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_tx_control);
|
|
} else {
|
|
writel(0x0140DF0F, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_rx_ssc_control1);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
|
|
writel(0x3F6F103F, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_rx_ssc_control0);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
|
|
/* Enable TX equalization (0xe824) */
|
|
writel(0x00040000, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_tx_control);
|
|
}
|
|
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
|
|
writel(oem_phy->afe_tx_amp_control0,
|
|
&ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_tx_amp_control0);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
|
|
writel(oem_phy->afe_tx_amp_control1,
|
|
&ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_tx_amp_control1);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
|
|
writel(oem_phy->afe_tx_amp_control2,
|
|
&ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_tx_amp_control2);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
|
|
writel(oem_phy->afe_tx_amp_control3,
|
|
&ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_tx_amp_control3);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
}
|
|
|
|
/* Transfer control to the PEs */
|
|
writel(0x00010f00, &ihost->scu_registers->afe.afe_dfx_master_control0);
|
|
udelay(AFE_REGISTER_WRITE_DELAY);
|
|
}
|
|
|
|
static void sci_controller_initialize_power_control(struct isci_host *ihost)
|
|
{
|
|
sci_init_timer(&ihost->power_control.timer, power_control_timeout);
|
|
|
|
memset(ihost->power_control.requesters, 0,
|
|
sizeof(ihost->power_control.requesters));
|
|
|
|
ihost->power_control.phys_waiting = 0;
|
|
ihost->power_control.phys_granted_power = 0;
|
|
}
|
|
|
|
static enum sci_status sci_controller_initialize(struct isci_host *ihost)
|
|
{
|
|
struct sci_base_state_machine *sm = &ihost->sm;
|
|
enum sci_status result = SCI_FAILURE;
|
|
unsigned long i, state, val;
|
|
|
|
if (ihost->sm.current_state_id != SCIC_RESET) {
|
|
dev_warn(&ihost->pdev->dev,
|
|
"SCIC Controller initialize operation requested "
|
|
"in invalid state\n");
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
|
|
sci_change_state(sm, SCIC_INITIALIZING);
|
|
|
|
sci_init_timer(&ihost->phy_timer, phy_startup_timeout);
|
|
|
|
ihost->next_phy_to_start = 0;
|
|
ihost->phy_startup_timer_pending = false;
|
|
|
|
sci_controller_initialize_power_control(ihost);
|
|
|
|
/*
|
|
* There is nothing to do here for B0 since we do not have to
|
|
* program the AFE registers.
|
|
* / @todo The AFE settings are supposed to be correct for the B0 but
|
|
* / presently they seem to be wrong. */
|
|
sci_controller_afe_initialization(ihost);
|
|
|
|
|
|
/* Take the hardware out of reset */
|
|
writel(0, &ihost->smu_registers->soft_reset_control);
|
|
|
|
/*
|
|
* / @todo Provide meaningfull error code for hardware failure
|
|
* result = SCI_FAILURE_CONTROLLER_HARDWARE; */
|
|
for (i = 100; i >= 1; i--) {
|
|
u32 status;
|
|
|
|
/* Loop until the hardware reports success */
|
|
udelay(SCU_CONTEXT_RAM_INIT_STALL_TIME);
|
|
status = readl(&ihost->smu_registers->control_status);
|
|
|
|
if ((status & SCU_RAM_INIT_COMPLETED) == SCU_RAM_INIT_COMPLETED)
|
|
break;
|
|
}
|
|
if (i == 0)
|
|
goto out;
|
|
|
|
/*
|
|
* Determine what are the actaul device capacities that the
|
|
* hardware will support */
|
|
val = readl(&ihost->smu_registers->device_context_capacity);
|
|
|
|
/* Record the smaller of the two capacity values */
|
|
ihost->logical_port_entries = min(smu_max_ports(val), SCI_MAX_PORTS);
|
|
ihost->task_context_entries = min(smu_max_task_contexts(val), SCI_MAX_IO_REQUESTS);
|
|
ihost->remote_node_entries = min(smu_max_rncs(val), SCI_MAX_REMOTE_DEVICES);
|
|
|
|
/*
|
|
* Make all PEs that are unassigned match up with the
|
|
* logical ports
|
|
*/
|
|
for (i = 0; i < ihost->logical_port_entries; i++) {
|
|
struct scu_port_task_scheduler_group_registers __iomem
|
|
*ptsg = &ihost->scu_registers->peg0.ptsg;
|
|
|
|
writel(i, &ptsg->protocol_engine[i]);
|
|
}
|
|
|
|
/* Initialize hardware PCI Relaxed ordering in DMA engines */
|
|
val = readl(&ihost->scu_registers->sdma.pdma_configuration);
|
|
val |= SCU_PDMACR_GEN_BIT(PCI_RELAXED_ORDERING_ENABLE);
|
|
writel(val, &ihost->scu_registers->sdma.pdma_configuration);
|
|
|
|
val = readl(&ihost->scu_registers->sdma.cdma_configuration);
|
|
val |= SCU_CDMACR_GEN_BIT(PCI_RELAXED_ORDERING_ENABLE);
|
|
writel(val, &ihost->scu_registers->sdma.cdma_configuration);
|
|
|
|
/*
|
|
* Initialize the PHYs before the PORTs because the PHY registers
|
|
* are accessed during the port initialization.
|
|
*/
|
|
for (i = 0; i < SCI_MAX_PHYS; i++) {
|
|
result = sci_phy_initialize(&ihost->phys[i],
|
|
&ihost->scu_registers->peg0.pe[i].tl,
|
|
&ihost->scu_registers->peg0.pe[i].ll);
|
|
if (result != SCI_SUCCESS)
|
|
goto out;
|
|
}
|
|
|
|
for (i = 0; i < ihost->logical_port_entries; i++) {
|
|
struct isci_port *iport = &ihost->ports[i];
|
|
|
|
iport->port_task_scheduler_registers = &ihost->scu_registers->peg0.ptsg.port[i];
|
|
iport->port_pe_configuration_register = &ihost->scu_registers->peg0.ptsg.protocol_engine[0];
|
|
iport->viit_registers = &ihost->scu_registers->peg0.viit[i];
|
|
}
|
|
|
|
result = sci_port_configuration_agent_initialize(ihost, &ihost->port_agent);
|
|
|
|
out:
|
|
/* Advance the controller state machine */
|
|
if (result == SCI_SUCCESS)
|
|
state = SCIC_INITIALIZED;
|
|
else
|
|
state = SCIC_FAILED;
|
|
sci_change_state(sm, state);
|
|
|
|
return result;
|
|
}
|
|
|
|
static enum sci_status sci_user_parameters_set(struct isci_host *ihost,
|
|
struct sci_user_parameters *sci_parms)
|
|
{
|
|
u32 state = ihost->sm.current_state_id;
|
|
|
|
if (state == SCIC_RESET ||
|
|
state == SCIC_INITIALIZING ||
|
|
state == SCIC_INITIALIZED) {
|
|
u16 index;
|
|
|
|
/*
|
|
* Validate the user parameters. If they are not legal, then
|
|
* return a failure.
|
|
*/
|
|
for (index = 0; index < SCI_MAX_PHYS; index++) {
|
|
struct sci_phy_user_params *user_phy;
|
|
|
|
user_phy = &sci_parms->phys[index];
|
|
|
|
if (!((user_phy->max_speed_generation <=
|
|
SCIC_SDS_PARM_MAX_SPEED) &&
|
|
(user_phy->max_speed_generation >
|
|
SCIC_SDS_PARM_NO_SPEED)))
|
|
return SCI_FAILURE_INVALID_PARAMETER_VALUE;
|
|
|
|
if (user_phy->in_connection_align_insertion_frequency <
|
|
3)
|
|
return SCI_FAILURE_INVALID_PARAMETER_VALUE;
|
|
|
|
if ((user_phy->in_connection_align_insertion_frequency <
|
|
3) ||
|
|
(user_phy->align_insertion_frequency == 0) ||
|
|
(user_phy->
|
|
notify_enable_spin_up_insertion_frequency ==
|
|
0))
|
|
return SCI_FAILURE_INVALID_PARAMETER_VALUE;
|
|
}
|
|
|
|
if ((sci_parms->stp_inactivity_timeout == 0) ||
|
|
(sci_parms->ssp_inactivity_timeout == 0) ||
|
|
(sci_parms->stp_max_occupancy_timeout == 0) ||
|
|
(sci_parms->ssp_max_occupancy_timeout == 0) ||
|
|
(sci_parms->no_outbound_task_timeout == 0))
|
|
return SCI_FAILURE_INVALID_PARAMETER_VALUE;
|
|
|
|
memcpy(&ihost->user_parameters, sci_parms, sizeof(*sci_parms));
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
|
|
static int sci_controller_mem_init(struct isci_host *ihost)
|
|
{
|
|
struct device *dev = &ihost->pdev->dev;
|
|
dma_addr_t dma;
|
|
size_t size;
|
|
int err;
|
|
|
|
size = SCU_MAX_COMPLETION_QUEUE_ENTRIES * sizeof(u32);
|
|
ihost->completion_queue = dmam_alloc_coherent(dev, size, &dma, GFP_KERNEL);
|
|
if (!ihost->completion_queue)
|
|
return -ENOMEM;
|
|
|
|
writel(lower_32_bits(dma), &ihost->smu_registers->completion_queue_lower);
|
|
writel(upper_32_bits(dma), &ihost->smu_registers->completion_queue_upper);
|
|
|
|
size = ihost->remote_node_entries * sizeof(union scu_remote_node_context);
|
|
ihost->remote_node_context_table = dmam_alloc_coherent(dev, size, &dma,
|
|
GFP_KERNEL);
|
|
if (!ihost->remote_node_context_table)
|
|
return -ENOMEM;
|
|
|
|
writel(lower_32_bits(dma), &ihost->smu_registers->remote_node_context_lower);
|
|
writel(upper_32_bits(dma), &ihost->smu_registers->remote_node_context_upper);
|
|
|
|
size = ihost->task_context_entries * sizeof(struct scu_task_context),
|
|
ihost->task_context_table = dmam_alloc_coherent(dev, size, &dma, GFP_KERNEL);
|
|
if (!ihost->task_context_table)
|
|
return -ENOMEM;
|
|
|
|
ihost->task_context_dma = dma;
|
|
writel(lower_32_bits(dma), &ihost->smu_registers->host_task_table_lower);
|
|
writel(upper_32_bits(dma), &ihost->smu_registers->host_task_table_upper);
|
|
|
|
err = sci_unsolicited_frame_control_construct(ihost);
|
|
if (err)
|
|
return err;
|
|
|
|
/*
|
|
* Inform the silicon as to the location of the UF headers and
|
|
* address table.
|
|
*/
|
|
writel(lower_32_bits(ihost->uf_control.headers.physical_address),
|
|
&ihost->scu_registers->sdma.uf_header_base_address_lower);
|
|
writel(upper_32_bits(ihost->uf_control.headers.physical_address),
|
|
&ihost->scu_registers->sdma.uf_header_base_address_upper);
|
|
|
|
writel(lower_32_bits(ihost->uf_control.address_table.physical_address),
|
|
&ihost->scu_registers->sdma.uf_address_table_lower);
|
|
writel(upper_32_bits(ihost->uf_control.address_table.physical_address),
|
|
&ihost->scu_registers->sdma.uf_address_table_upper);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int isci_host_init(struct isci_host *ihost)
|
|
{
|
|
int err = 0, i;
|
|
enum sci_status status;
|
|
struct sci_user_parameters sci_user_params;
|
|
struct isci_pci_info *pci_info = to_pci_info(ihost->pdev);
|
|
|
|
spin_lock_init(&ihost->state_lock);
|
|
spin_lock_init(&ihost->scic_lock);
|
|
init_waitqueue_head(&ihost->eventq);
|
|
|
|
isci_host_change_state(ihost, isci_starting);
|
|
|
|
status = sci_controller_construct(ihost, scu_base(ihost),
|
|
smu_base(ihost));
|
|
|
|
if (status != SCI_SUCCESS) {
|
|
dev_err(&ihost->pdev->dev,
|
|
"%s: sci_controller_construct failed - status = %x\n",
|
|
__func__,
|
|
status);
|
|
return -ENODEV;
|
|
}
|
|
|
|
ihost->sas_ha.dev = &ihost->pdev->dev;
|
|
ihost->sas_ha.lldd_ha = ihost;
|
|
|
|
/*
|
|
* grab initial values stored in the controller object for OEM and USER
|
|
* parameters
|
|
*/
|
|
isci_user_parameters_get(&sci_user_params);
|
|
status = sci_user_parameters_set(ihost, &sci_user_params);
|
|
if (status != SCI_SUCCESS) {
|
|
dev_warn(&ihost->pdev->dev,
|
|
"%s: sci_user_parameters_set failed\n",
|
|
__func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* grab any OEM parameters specified in orom */
|
|
if (pci_info->orom) {
|
|
status = isci_parse_oem_parameters(&ihost->oem_parameters,
|
|
pci_info->orom,
|
|
ihost->id);
|
|
if (status != SCI_SUCCESS) {
|
|
dev_warn(&ihost->pdev->dev,
|
|
"parsing firmware oem parameters failed\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
status = sci_oem_parameters_set(ihost);
|
|
if (status != SCI_SUCCESS) {
|
|
dev_warn(&ihost->pdev->dev,
|
|
"%s: sci_oem_parameters_set failed\n",
|
|
__func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
tasklet_init(&ihost->completion_tasklet,
|
|
isci_host_completion_routine, (unsigned long)ihost);
|
|
|
|
INIT_LIST_HEAD(&ihost->requests_to_complete);
|
|
INIT_LIST_HEAD(&ihost->requests_to_errorback);
|
|
|
|
spin_lock_irq(&ihost->scic_lock);
|
|
status = sci_controller_initialize(ihost);
|
|
spin_unlock_irq(&ihost->scic_lock);
|
|
if (status != SCI_SUCCESS) {
|
|
dev_warn(&ihost->pdev->dev,
|
|
"%s: sci_controller_initialize failed -"
|
|
" status = 0x%x\n",
|
|
__func__, status);
|
|
return -ENODEV;
|
|
}
|
|
|
|
err = sci_controller_mem_init(ihost);
|
|
if (err)
|
|
return err;
|
|
|
|
for (i = 0; i < SCI_MAX_PORTS; i++)
|
|
isci_port_init(&ihost->ports[i], ihost, i);
|
|
|
|
for (i = 0; i < SCI_MAX_PHYS; i++)
|
|
isci_phy_init(&ihost->phys[i], ihost, i);
|
|
|
|
for (i = 0; i < SCI_MAX_REMOTE_DEVICES; i++) {
|
|
struct isci_remote_device *idev = &ihost->devices[i];
|
|
|
|
INIT_LIST_HEAD(&idev->reqs_in_process);
|
|
INIT_LIST_HEAD(&idev->node);
|
|
}
|
|
|
|
for (i = 0; i < SCI_MAX_IO_REQUESTS; i++) {
|
|
struct isci_request *ireq;
|
|
dma_addr_t dma;
|
|
|
|
ireq = dmam_alloc_coherent(&ihost->pdev->dev,
|
|
sizeof(struct isci_request), &dma,
|
|
GFP_KERNEL);
|
|
if (!ireq)
|
|
return -ENOMEM;
|
|
|
|
ireq->tc = &ihost->task_context_table[i];
|
|
ireq->owning_controller = ihost;
|
|
spin_lock_init(&ireq->state_lock);
|
|
ireq->request_daddr = dma;
|
|
ireq->isci_host = ihost;
|
|
ihost->reqs[i] = ireq;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void sci_controller_link_up(struct isci_host *ihost, struct isci_port *iport,
|
|
struct isci_phy *iphy)
|
|
{
|
|
switch (ihost->sm.current_state_id) {
|
|
case SCIC_STARTING:
|
|
sci_del_timer(&ihost->phy_timer);
|
|
ihost->phy_startup_timer_pending = false;
|
|
ihost->port_agent.link_up_handler(ihost, &ihost->port_agent,
|
|
iport, iphy);
|
|
sci_controller_start_next_phy(ihost);
|
|
break;
|
|
case SCIC_READY:
|
|
ihost->port_agent.link_up_handler(ihost, &ihost->port_agent,
|
|
iport, iphy);
|
|
break;
|
|
default:
|
|
dev_dbg(&ihost->pdev->dev,
|
|
"%s: SCIC Controller linkup event from phy %d in "
|
|
"unexpected state %d\n", __func__, iphy->phy_index,
|
|
ihost->sm.current_state_id);
|
|
}
|
|
}
|
|
|
|
void sci_controller_link_down(struct isci_host *ihost, struct isci_port *iport,
|
|
struct isci_phy *iphy)
|
|
{
|
|
switch (ihost->sm.current_state_id) {
|
|
case SCIC_STARTING:
|
|
case SCIC_READY:
|
|
ihost->port_agent.link_down_handler(ihost, &ihost->port_agent,
|
|
iport, iphy);
|
|
break;
|
|
default:
|
|
dev_dbg(&ihost->pdev->dev,
|
|
"%s: SCIC Controller linkdown event from phy %d in "
|
|
"unexpected state %d\n",
|
|
__func__,
|
|
iphy->phy_index,
|
|
ihost->sm.current_state_id);
|
|
}
|
|
}
|
|
|
|
static bool sci_controller_has_remote_devices_stopping(struct isci_host *ihost)
|
|
{
|
|
u32 index;
|
|
|
|
for (index = 0; index < ihost->remote_node_entries; index++) {
|
|
if ((ihost->device_table[index] != NULL) &&
|
|
(ihost->device_table[index]->sm.current_state_id == SCI_DEV_STOPPING))
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void sci_controller_remote_device_stopped(struct isci_host *ihost,
|
|
struct isci_remote_device *idev)
|
|
{
|
|
if (ihost->sm.current_state_id != SCIC_STOPPING) {
|
|
dev_dbg(&ihost->pdev->dev,
|
|
"SCIC Controller 0x%p remote device stopped event "
|
|
"from device 0x%p in unexpected state %d\n",
|
|
ihost, idev,
|
|
ihost->sm.current_state_id);
|
|
return;
|
|
}
|
|
|
|
if (!sci_controller_has_remote_devices_stopping(ihost))
|
|
sci_change_state(&ihost->sm, SCIC_STOPPED);
|
|
}
|
|
|
|
void sci_controller_post_request(struct isci_host *ihost, u32 request)
|
|
{
|
|
dev_dbg(&ihost->pdev->dev, "%s[%d]: %#x\n",
|
|
__func__, ihost->id, request);
|
|
|
|
writel(request, &ihost->smu_registers->post_context_port);
|
|
}
|
|
|
|
struct isci_request *sci_request_by_tag(struct isci_host *ihost, u16 io_tag)
|
|
{
|
|
u16 task_index;
|
|
u16 task_sequence;
|
|
|
|
task_index = ISCI_TAG_TCI(io_tag);
|
|
|
|
if (task_index < ihost->task_context_entries) {
|
|
struct isci_request *ireq = ihost->reqs[task_index];
|
|
|
|
if (test_bit(IREQ_ACTIVE, &ireq->flags)) {
|
|
task_sequence = ISCI_TAG_SEQ(io_tag);
|
|
|
|
if (task_sequence == ihost->io_request_sequence[task_index])
|
|
return ireq;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* This method allocates remote node index and the reserves the remote node
|
|
* context space for use. This method can fail if there are no more remote
|
|
* node index available.
|
|
* @scic: This is the controller object which contains the set of
|
|
* free remote node ids
|
|
* @sci_dev: This is the device object which is requesting the a remote node
|
|
* id
|
|
* @node_id: This is the remote node id that is assinged to the device if one
|
|
* is available
|
|
*
|
|
* enum sci_status SCI_FAILURE_OUT_OF_RESOURCES if there are no available remote
|
|
* node index available.
|
|
*/
|
|
enum sci_status sci_controller_allocate_remote_node_context(struct isci_host *ihost,
|
|
struct isci_remote_device *idev,
|
|
u16 *node_id)
|
|
{
|
|
u16 node_index;
|
|
u32 remote_node_count = sci_remote_device_node_count(idev);
|
|
|
|
node_index = sci_remote_node_table_allocate_remote_node(
|
|
&ihost->available_remote_nodes, remote_node_count
|
|
);
|
|
|
|
if (node_index != SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX) {
|
|
ihost->device_table[node_index] = idev;
|
|
|
|
*node_id = node_index;
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
return SCI_FAILURE_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
void sci_controller_free_remote_node_context(struct isci_host *ihost,
|
|
struct isci_remote_device *idev,
|
|
u16 node_id)
|
|
{
|
|
u32 remote_node_count = sci_remote_device_node_count(idev);
|
|
|
|
if (ihost->device_table[node_id] == idev) {
|
|
ihost->device_table[node_id] = NULL;
|
|
|
|
sci_remote_node_table_release_remote_node_index(
|
|
&ihost->available_remote_nodes, remote_node_count, node_id
|
|
);
|
|
}
|
|
}
|
|
|
|
void sci_controller_copy_sata_response(void *response_buffer,
|
|
void *frame_header,
|
|
void *frame_buffer)
|
|
{
|
|
/* XXX type safety? */
|
|
memcpy(response_buffer, frame_header, sizeof(u32));
|
|
|
|
memcpy(response_buffer + sizeof(u32),
|
|
frame_buffer,
|
|
sizeof(struct dev_to_host_fis) - sizeof(u32));
|
|
}
|
|
|
|
void sci_controller_release_frame(struct isci_host *ihost, u32 frame_index)
|
|
{
|
|
if (sci_unsolicited_frame_control_release_frame(&ihost->uf_control, frame_index))
|
|
writel(ihost->uf_control.get,
|
|
&ihost->scu_registers->sdma.unsolicited_frame_get_pointer);
|
|
}
|
|
|
|
void isci_tci_free(struct isci_host *ihost, u16 tci)
|
|
{
|
|
u16 tail = ihost->tci_tail & (SCI_MAX_IO_REQUESTS-1);
|
|
|
|
ihost->tci_pool[tail] = tci;
|
|
ihost->tci_tail = tail + 1;
|
|
}
|
|
|
|
static u16 isci_tci_alloc(struct isci_host *ihost)
|
|
{
|
|
u16 head = ihost->tci_head & (SCI_MAX_IO_REQUESTS-1);
|
|
u16 tci = ihost->tci_pool[head];
|
|
|
|
ihost->tci_head = head + 1;
|
|
return tci;
|
|
}
|
|
|
|
static u16 isci_tci_space(struct isci_host *ihost)
|
|
{
|
|
return CIRC_SPACE(ihost->tci_head, ihost->tci_tail, SCI_MAX_IO_REQUESTS);
|
|
}
|
|
|
|
u16 isci_alloc_tag(struct isci_host *ihost)
|
|
{
|
|
if (isci_tci_space(ihost)) {
|
|
u16 tci = isci_tci_alloc(ihost);
|
|
u8 seq = ihost->io_request_sequence[tci];
|
|
|
|
return ISCI_TAG(seq, tci);
|
|
}
|
|
|
|
return SCI_CONTROLLER_INVALID_IO_TAG;
|
|
}
|
|
|
|
enum sci_status isci_free_tag(struct isci_host *ihost, u16 io_tag)
|
|
{
|
|
u16 tci = ISCI_TAG_TCI(io_tag);
|
|
u16 seq = ISCI_TAG_SEQ(io_tag);
|
|
|
|
/* prevent tail from passing head */
|
|
if (isci_tci_active(ihost) == 0)
|
|
return SCI_FAILURE_INVALID_IO_TAG;
|
|
|
|
if (seq == ihost->io_request_sequence[tci]) {
|
|
ihost->io_request_sequence[tci] = (seq+1) & (SCI_MAX_SEQ-1);
|
|
|
|
isci_tci_free(ihost, tci);
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
return SCI_FAILURE_INVALID_IO_TAG;
|
|
}
|
|
|
|
enum sci_status sci_controller_start_io(struct isci_host *ihost,
|
|
struct isci_remote_device *idev,
|
|
struct isci_request *ireq)
|
|
{
|
|
enum sci_status status;
|
|
|
|
if (ihost->sm.current_state_id != SCIC_READY) {
|
|
dev_warn(&ihost->pdev->dev, "invalid state to start I/O");
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
|
|
status = sci_remote_device_start_io(ihost, idev, ireq);
|
|
if (status != SCI_SUCCESS)
|
|
return status;
|
|
|
|
set_bit(IREQ_ACTIVE, &ireq->flags);
|
|
sci_controller_post_request(ihost, ireq->post_context);
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
enum sci_status sci_controller_terminate_request(struct isci_host *ihost,
|
|
struct isci_remote_device *idev,
|
|
struct isci_request *ireq)
|
|
{
|
|
/* terminate an ongoing (i.e. started) core IO request. This does not
|
|
* abort the IO request at the target, but rather removes the IO
|
|
* request from the host controller.
|
|
*/
|
|
enum sci_status status;
|
|
|
|
if (ihost->sm.current_state_id != SCIC_READY) {
|
|
dev_warn(&ihost->pdev->dev,
|
|
"invalid state to terminate request\n");
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
|
|
status = sci_io_request_terminate(ireq);
|
|
if (status != SCI_SUCCESS)
|
|
return status;
|
|
|
|
/*
|
|
* Utilize the original post context command and or in the POST_TC_ABORT
|
|
* request sub-type.
|
|
*/
|
|
sci_controller_post_request(ihost,
|
|
ireq->post_context | SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT);
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* sci_controller_complete_io() - This method will perform core specific
|
|
* completion operations for an IO request. After this method is invoked,
|
|
* the user should consider the IO request as invalid until it is properly
|
|
* reused (i.e. re-constructed).
|
|
* @ihost: The handle to the controller object for which to complete the
|
|
* IO request.
|
|
* @idev: The handle to the remote device object for which to complete
|
|
* the IO request.
|
|
* @ireq: the handle to the io request object to complete.
|
|
*/
|
|
enum sci_status sci_controller_complete_io(struct isci_host *ihost,
|
|
struct isci_remote_device *idev,
|
|
struct isci_request *ireq)
|
|
{
|
|
enum sci_status status;
|
|
u16 index;
|
|
|
|
switch (ihost->sm.current_state_id) {
|
|
case SCIC_STOPPING:
|
|
/* XXX: Implement this function */
|
|
return SCI_FAILURE;
|
|
case SCIC_READY:
|
|
status = sci_remote_device_complete_io(ihost, idev, ireq);
|
|
if (status != SCI_SUCCESS)
|
|
return status;
|
|
|
|
index = ISCI_TAG_TCI(ireq->io_tag);
|
|
clear_bit(IREQ_ACTIVE, &ireq->flags);
|
|
return SCI_SUCCESS;
|
|
default:
|
|
dev_warn(&ihost->pdev->dev, "invalid state to complete I/O");
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
|
|
}
|
|
|
|
enum sci_status sci_controller_continue_io(struct isci_request *ireq)
|
|
{
|
|
struct isci_host *ihost = ireq->owning_controller;
|
|
|
|
if (ihost->sm.current_state_id != SCIC_READY) {
|
|
dev_warn(&ihost->pdev->dev, "invalid state to continue I/O");
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
|
|
set_bit(IREQ_ACTIVE, &ireq->flags);
|
|
sci_controller_post_request(ihost, ireq->post_context);
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* sci_controller_start_task() - This method is called by the SCIC user to
|
|
* send/start a framework task management request.
|
|
* @controller: the handle to the controller object for which to start the task
|
|
* management request.
|
|
* @remote_device: the handle to the remote device object for which to start
|
|
* the task management request.
|
|
* @task_request: the handle to the task request object to start.
|
|
*/
|
|
enum sci_task_status sci_controller_start_task(struct isci_host *ihost,
|
|
struct isci_remote_device *idev,
|
|
struct isci_request *ireq)
|
|
{
|
|
enum sci_status status;
|
|
|
|
if (ihost->sm.current_state_id != SCIC_READY) {
|
|
dev_warn(&ihost->pdev->dev,
|
|
"%s: SCIC Controller starting task from invalid "
|
|
"state\n",
|
|
__func__);
|
|
return SCI_TASK_FAILURE_INVALID_STATE;
|
|
}
|
|
|
|
status = sci_remote_device_start_task(ihost, idev, ireq);
|
|
switch (status) {
|
|
case SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS:
|
|
set_bit(IREQ_ACTIVE, &ireq->flags);
|
|
|
|
/*
|
|
* We will let framework know this task request started successfully,
|
|
* although core is still woring on starting the request (to post tc when
|
|
* RNC is resumed.)
|
|
*/
|
|
return SCI_SUCCESS;
|
|
case SCI_SUCCESS:
|
|
set_bit(IREQ_ACTIVE, &ireq->flags);
|
|
sci_controller_post_request(ihost, ireq->post_context);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return status;
|
|
}
|