![Kees Cook](/assets/img/avatar_default.png)
In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Cc: Intel SCU Linux support <intel-linux-scu@intel.com> Cc: Artur Paszkiewicz <artur.paszkiewicz@intel.com> Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: linux-scsi@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
1488 lines
46 KiB
C
1488 lines
46 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 "isci.h"
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#include "host.h"
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#include "phy.h"
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#include "scu_event_codes.h"
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#include "probe_roms.h"
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#undef C
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#define C(a) (#a)
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static const char *phy_state_name(enum sci_phy_states state)
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{
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static const char * const strings[] = PHY_STATES;
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return strings[state];
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}
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#undef C
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/* Maximum arbitration wait time in micro-seconds */
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#define SCIC_SDS_PHY_MAX_ARBITRATION_WAIT_TIME (700)
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enum sas_linkrate sci_phy_linkrate(struct isci_phy *iphy)
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{
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return iphy->max_negotiated_speed;
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}
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static struct isci_host *phy_to_host(struct isci_phy *iphy)
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{
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struct isci_phy *table = iphy - iphy->phy_index;
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struct isci_host *ihost = container_of(table, typeof(*ihost), phys[0]);
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return ihost;
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}
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static struct device *sciphy_to_dev(struct isci_phy *iphy)
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{
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return &phy_to_host(iphy)->pdev->dev;
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}
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static enum sci_status
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sci_phy_transport_layer_initialization(struct isci_phy *iphy,
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struct scu_transport_layer_registers __iomem *reg)
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{
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u32 tl_control;
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iphy->transport_layer_registers = reg;
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writel(SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX,
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&iphy->transport_layer_registers->stp_rni);
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/*
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* Hardware team recommends that we enable the STP prefetch for all
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* transports
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*/
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tl_control = readl(&iphy->transport_layer_registers->control);
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tl_control |= SCU_TLCR_GEN_BIT(STP_WRITE_DATA_PREFETCH);
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writel(tl_control, &iphy->transport_layer_registers->control);
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return SCI_SUCCESS;
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}
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static enum sci_status
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sci_phy_link_layer_initialization(struct isci_phy *iphy,
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struct scu_link_layer_registers __iomem *llr)
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{
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struct isci_host *ihost = iphy->owning_port->owning_controller;
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struct sci_phy_user_params *phy_user;
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struct sci_phy_oem_params *phy_oem;
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int phy_idx = iphy->phy_index;
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struct sci_phy_cap phy_cap;
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u32 phy_configuration;
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u32 parity_check = 0;
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u32 parity_count = 0;
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u32 llctl, link_rate;
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u32 clksm_value = 0;
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u32 sp_timeouts = 0;
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phy_user = &ihost->user_parameters.phys[phy_idx];
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phy_oem = &ihost->oem_parameters.phys[phy_idx];
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iphy->link_layer_registers = llr;
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/* Set our IDENTIFY frame data */
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#define SCI_END_DEVICE 0x01
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writel(SCU_SAS_TIID_GEN_BIT(SMP_INITIATOR) |
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SCU_SAS_TIID_GEN_BIT(SSP_INITIATOR) |
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SCU_SAS_TIID_GEN_BIT(STP_INITIATOR) |
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SCU_SAS_TIID_GEN_BIT(DA_SATA_HOST) |
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SCU_SAS_TIID_GEN_VAL(DEVICE_TYPE, SCI_END_DEVICE),
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&llr->transmit_identification);
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/* Write the device SAS Address */
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writel(0xFEDCBA98, &llr->sas_device_name_high);
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writel(phy_idx, &llr->sas_device_name_low);
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/* Write the source SAS Address */
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writel(phy_oem->sas_address.high, &llr->source_sas_address_high);
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writel(phy_oem->sas_address.low, &llr->source_sas_address_low);
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/* Clear and Set the PHY Identifier */
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writel(0, &llr->identify_frame_phy_id);
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writel(SCU_SAS_TIPID_GEN_VALUE(ID, phy_idx), &llr->identify_frame_phy_id);
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/* Change the initial state of the phy configuration register */
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phy_configuration = readl(&llr->phy_configuration);
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/* Hold OOB state machine in reset */
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phy_configuration |= SCU_SAS_PCFG_GEN_BIT(OOB_RESET);
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writel(phy_configuration, &llr->phy_configuration);
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/* Configure the SNW capabilities */
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phy_cap.all = 0;
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phy_cap.start = 1;
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phy_cap.gen3_no_ssc = 1;
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phy_cap.gen2_no_ssc = 1;
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phy_cap.gen1_no_ssc = 1;
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if (ihost->oem_parameters.controller.do_enable_ssc) {
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struct scu_afe_registers __iomem *afe = &ihost->scu_registers->afe;
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struct scu_afe_transceiver __iomem *xcvr = &afe->scu_afe_xcvr[phy_idx];
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struct isci_pci_info *pci_info = to_pci_info(ihost->pdev);
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bool en_sas = false;
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bool en_sata = false;
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u32 sas_type = 0;
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u32 sata_spread = 0x2;
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u32 sas_spread = 0x2;
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phy_cap.gen3_ssc = 1;
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phy_cap.gen2_ssc = 1;
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phy_cap.gen1_ssc = 1;
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if (pci_info->orom->hdr.version < ISCI_ROM_VER_1_1)
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en_sas = en_sata = true;
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else {
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sata_spread = ihost->oem_parameters.controller.ssc_sata_tx_spread_level;
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sas_spread = ihost->oem_parameters.controller.ssc_sas_tx_spread_level;
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if (sata_spread)
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en_sata = true;
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if (sas_spread) {
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en_sas = true;
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sas_type = ihost->oem_parameters.controller.ssc_sas_tx_type;
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}
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}
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if (en_sas) {
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u32 reg;
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reg = readl(&xcvr->afe_xcvr_control0);
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reg |= (0x00100000 | (sas_type << 19));
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writel(reg, &xcvr->afe_xcvr_control0);
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reg = readl(&xcvr->afe_tx_ssc_control);
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reg |= sas_spread << 8;
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writel(reg, &xcvr->afe_tx_ssc_control);
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}
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if (en_sata) {
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u32 reg;
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reg = readl(&xcvr->afe_tx_ssc_control);
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reg |= sata_spread;
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writel(reg, &xcvr->afe_tx_ssc_control);
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reg = readl(&llr->stp_control);
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reg |= 1 << 12;
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writel(reg, &llr->stp_control);
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}
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}
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/* The SAS specification indicates that the phy_capabilities that
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* are transmitted shall have an even parity. Calculate the parity.
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*/
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parity_check = phy_cap.all;
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while (parity_check != 0) {
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if (parity_check & 0x1)
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parity_count++;
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parity_check >>= 1;
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}
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/* If parity indicates there are an odd number of bits set, then
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* set the parity bit to 1 in the phy capabilities.
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*/
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if ((parity_count % 2) != 0)
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phy_cap.parity = 1;
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writel(phy_cap.all, &llr->phy_capabilities);
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/* Set the enable spinup period but disable the ability to send
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* notify enable spinup
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*/
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writel(SCU_ENSPINUP_GEN_VAL(COUNT,
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phy_user->notify_enable_spin_up_insertion_frequency),
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&llr->notify_enable_spinup_control);
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/* Write the ALIGN Insertion Ferequency for connected phy and
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* inpendent of connected state
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*/
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clksm_value = SCU_ALIGN_INSERTION_FREQUENCY_GEN_VAL(CONNECTED,
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phy_user->in_connection_align_insertion_frequency);
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clksm_value |= SCU_ALIGN_INSERTION_FREQUENCY_GEN_VAL(GENERAL,
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phy_user->align_insertion_frequency);
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writel(clksm_value, &llr->clock_skew_management);
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if (is_c0(ihost->pdev) || is_c1(ihost->pdev)) {
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writel(0x04210400, &llr->afe_lookup_table_control);
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writel(0x020A7C05, &llr->sas_primitive_timeout);
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} else
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writel(0x02108421, &llr->afe_lookup_table_control);
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llctl = SCU_SAS_LLCTL_GEN_VAL(NO_OUTBOUND_TASK_TIMEOUT,
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(u8)ihost->user_parameters.no_outbound_task_timeout);
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switch (phy_user->max_speed_generation) {
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case SCIC_SDS_PARM_GEN3_SPEED:
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link_rate = SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN3;
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break;
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case SCIC_SDS_PARM_GEN2_SPEED:
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link_rate = SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN2;
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break;
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default:
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link_rate = SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN1;
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break;
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}
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llctl |= SCU_SAS_LLCTL_GEN_VAL(MAX_LINK_RATE, link_rate);
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writel(llctl, &llr->link_layer_control);
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sp_timeouts = readl(&llr->sas_phy_timeouts);
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/* Clear the default 0x36 (54us) RATE_CHANGE timeout value. */
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sp_timeouts &= ~SCU_SAS_PHYTOV_GEN_VAL(RATE_CHANGE, 0xFF);
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/* Set RATE_CHANGE timeout value to 0x3B (59us). This ensures SCU can
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* lock with 3Gb drive when SCU max rate is set to 1.5Gb.
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*/
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sp_timeouts |= SCU_SAS_PHYTOV_GEN_VAL(RATE_CHANGE, 0x3B);
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writel(sp_timeouts, &llr->sas_phy_timeouts);
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if (is_a2(ihost->pdev)) {
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/* Program the max ARB time for the PHY to 700us so we
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* inter-operate with the PMC expander which shuts down
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* PHYs if the expander PHY generates too many breaks.
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* This time value will guarantee that the initiator PHY
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* will generate the break.
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*/
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writel(SCIC_SDS_PHY_MAX_ARBITRATION_WAIT_TIME,
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&llr->maximum_arbitration_wait_timer_timeout);
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}
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/* Disable link layer hang detection, rely on the OS timeout for
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* I/O timeouts.
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*/
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writel(0, &llr->link_layer_hang_detection_timeout);
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/* We can exit the initial state to the stopped state */
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sci_change_state(&iphy->sm, SCI_PHY_STOPPED);
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return SCI_SUCCESS;
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}
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static void phy_sata_timeout(struct timer_list *t)
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{
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struct sci_timer *tmr = from_timer(tmr, t, timer);
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struct isci_phy *iphy = container_of(tmr, typeof(*iphy), sata_timer);
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struct isci_host *ihost = iphy->owning_port->owning_controller;
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unsigned long flags;
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spin_lock_irqsave(&ihost->scic_lock, flags);
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if (tmr->cancel)
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goto done;
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dev_dbg(sciphy_to_dev(iphy),
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"%s: SCIC SDS Phy 0x%p did not receive signature fis before "
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"timeout.\n",
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__func__,
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iphy);
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sci_change_state(&iphy->sm, SCI_PHY_STARTING);
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done:
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spin_unlock_irqrestore(&ihost->scic_lock, flags);
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}
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/**
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* This method returns the port currently containing this phy. If the phy is
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* currently contained by the dummy port, then the phy is considered to not
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* be part of a port.
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* @sci_phy: This parameter specifies the phy for which to retrieve the
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* containing port.
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*
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* This method returns a handle to a port that contains the supplied phy.
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* NULL This value is returned if the phy is not part of a real
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* port (i.e. it's contained in the dummy port). !NULL All other
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* values indicate a handle/pointer to the port containing the phy.
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*/
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struct isci_port *phy_get_non_dummy_port(struct isci_phy *iphy)
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{
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struct isci_port *iport = iphy->owning_port;
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if (iport->physical_port_index == SCIC_SDS_DUMMY_PORT)
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return NULL;
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return iphy->owning_port;
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}
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/**
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* This method will assign a port to the phy object.
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* @out]: iphy This parameter specifies the phy for which to assign a port
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* object.
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*
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*
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*/
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void sci_phy_set_port(
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struct isci_phy *iphy,
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struct isci_port *iport)
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{
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iphy->owning_port = iport;
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if (iphy->bcn_received_while_port_unassigned) {
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iphy->bcn_received_while_port_unassigned = false;
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sci_port_broadcast_change_received(iphy->owning_port, iphy);
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}
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}
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enum sci_status sci_phy_initialize(struct isci_phy *iphy,
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struct scu_transport_layer_registers __iomem *tl,
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struct scu_link_layer_registers __iomem *ll)
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{
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/* Perfrom the initialization of the TL hardware */
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sci_phy_transport_layer_initialization(iphy, tl);
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/* Perofrm the initialization of the PE hardware */
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sci_phy_link_layer_initialization(iphy, ll);
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/* There is nothing that needs to be done in this state just
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* transition to the stopped state
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*/
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sci_change_state(&iphy->sm, SCI_PHY_STOPPED);
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return SCI_SUCCESS;
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}
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/**
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* This method assigns the direct attached device ID for this phy.
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*
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* @iphy The phy for which the direct attached device id is to
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* be assigned.
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* @device_id The direct attached device ID to assign to the phy.
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* This will either be the RNi for the device or an invalid RNi if there
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* is no current device assigned to the phy.
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*/
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void sci_phy_setup_transport(struct isci_phy *iphy, u32 device_id)
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{
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u32 tl_control;
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writel(device_id, &iphy->transport_layer_registers->stp_rni);
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/*
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* The read should guarantee that the first write gets posted
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* before the next write
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*/
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tl_control = readl(&iphy->transport_layer_registers->control);
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tl_control |= SCU_TLCR_GEN_BIT(CLEAR_TCI_NCQ_MAPPING_TABLE);
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writel(tl_control, &iphy->transport_layer_registers->control);
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}
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static void sci_phy_suspend(struct isci_phy *iphy)
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{
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u32 scu_sas_pcfg_value;
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scu_sas_pcfg_value =
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readl(&iphy->link_layer_registers->phy_configuration);
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scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(SUSPEND_PROTOCOL_ENGINE);
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writel(scu_sas_pcfg_value,
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&iphy->link_layer_registers->phy_configuration);
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sci_phy_setup_transport(iphy, SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX);
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}
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void sci_phy_resume(struct isci_phy *iphy)
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{
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u32 scu_sas_pcfg_value;
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scu_sas_pcfg_value =
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readl(&iphy->link_layer_registers->phy_configuration);
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scu_sas_pcfg_value &= ~SCU_SAS_PCFG_GEN_BIT(SUSPEND_PROTOCOL_ENGINE);
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writel(scu_sas_pcfg_value,
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&iphy->link_layer_registers->phy_configuration);
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}
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void sci_phy_get_sas_address(struct isci_phy *iphy, struct sci_sas_address *sas)
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{
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sas->high = readl(&iphy->link_layer_registers->source_sas_address_high);
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sas->low = readl(&iphy->link_layer_registers->source_sas_address_low);
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}
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|
|
void sci_phy_get_attached_sas_address(struct isci_phy *iphy, struct sci_sas_address *sas)
|
|
{
|
|
struct sas_identify_frame *iaf;
|
|
|
|
iaf = &iphy->frame_rcvd.iaf;
|
|
memcpy(sas, iaf->sas_addr, SAS_ADDR_SIZE);
|
|
}
|
|
|
|
void sci_phy_get_protocols(struct isci_phy *iphy, struct sci_phy_proto *proto)
|
|
{
|
|
proto->all = readl(&iphy->link_layer_registers->transmit_identification);
|
|
}
|
|
|
|
enum sci_status sci_phy_start(struct isci_phy *iphy)
|
|
{
|
|
enum sci_phy_states state = iphy->sm.current_state_id;
|
|
|
|
if (state != SCI_PHY_STOPPED) {
|
|
dev_dbg(sciphy_to_dev(iphy), "%s: in wrong state: %s\n",
|
|
__func__, phy_state_name(state));
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
|
|
sci_change_state(&iphy->sm, SCI_PHY_STARTING);
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
enum sci_status sci_phy_stop(struct isci_phy *iphy)
|
|
{
|
|
enum sci_phy_states state = iphy->sm.current_state_id;
|
|
|
|
switch (state) {
|
|
case SCI_PHY_SUB_INITIAL:
|
|
case SCI_PHY_SUB_AWAIT_OSSP_EN:
|
|
case SCI_PHY_SUB_AWAIT_SAS_SPEED_EN:
|
|
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:
|
|
case SCI_PHY_READY:
|
|
break;
|
|
default:
|
|
dev_dbg(sciphy_to_dev(iphy), "%s: in wrong state: %s\n",
|
|
__func__, phy_state_name(state));
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
|
|
sci_change_state(&iphy->sm, SCI_PHY_STOPPED);
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
enum sci_status sci_phy_reset(struct isci_phy *iphy)
|
|
{
|
|
enum sci_phy_states state = iphy->sm.current_state_id;
|
|
|
|
if (state != SCI_PHY_READY) {
|
|
dev_dbg(sciphy_to_dev(iphy), "%s: in wrong state: %s\n",
|
|
__func__, phy_state_name(state));
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
|
|
sci_change_state(&iphy->sm, SCI_PHY_RESETTING);
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
enum sci_status sci_phy_consume_power_handler(struct isci_phy *iphy)
|
|
{
|
|
enum sci_phy_states state = iphy->sm.current_state_id;
|
|
|
|
switch (state) {
|
|
case SCI_PHY_SUB_AWAIT_SAS_POWER: {
|
|
u32 enable_spinup;
|
|
|
|
enable_spinup = readl(&iphy->link_layer_registers->notify_enable_spinup_control);
|
|
enable_spinup |= SCU_ENSPINUP_GEN_BIT(ENABLE);
|
|
writel(enable_spinup, &iphy->link_layer_registers->notify_enable_spinup_control);
|
|
|
|
/* Change state to the final state this substate machine has run to completion */
|
|
sci_change_state(&iphy->sm, SCI_PHY_SUB_FINAL);
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
case SCI_PHY_SUB_AWAIT_SATA_POWER: {
|
|
u32 scu_sas_pcfg_value;
|
|
|
|
/* Release the spinup hold state and reset the OOB state machine */
|
|
scu_sas_pcfg_value =
|
|
readl(&iphy->link_layer_registers->phy_configuration);
|
|
scu_sas_pcfg_value &=
|
|
~(SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD) | SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE));
|
|
scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_RESET);
|
|
writel(scu_sas_pcfg_value,
|
|
&iphy->link_layer_registers->phy_configuration);
|
|
|
|
/* Now restart the OOB operation */
|
|
scu_sas_pcfg_value &= ~SCU_SAS_PCFG_GEN_BIT(OOB_RESET);
|
|
scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE);
|
|
writel(scu_sas_pcfg_value,
|
|
&iphy->link_layer_registers->phy_configuration);
|
|
|
|
/* Change state to the final state this substate machine has run to completion */
|
|
sci_change_state(&iphy->sm, SCI_PHY_SUB_AWAIT_SATA_PHY_EN);
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
default:
|
|
dev_dbg(sciphy_to_dev(iphy), "%s: in wrong state: %s\n",
|
|
__func__, phy_state_name(state));
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
}
|
|
|
|
static void sci_phy_start_sas_link_training(struct isci_phy *iphy)
|
|
{
|
|
/* continue the link training for the phy as if it were a SAS PHY
|
|
* instead of a SATA PHY. This is done because the completion queue had a SAS
|
|
* PHY DETECTED event when the state machine was expecting a SATA PHY event.
|
|
*/
|
|
u32 phy_control;
|
|
|
|
phy_control = readl(&iphy->link_layer_registers->phy_configuration);
|
|
phy_control |= SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD);
|
|
writel(phy_control,
|
|
&iphy->link_layer_registers->phy_configuration);
|
|
|
|
sci_change_state(&iphy->sm, SCI_PHY_SUB_AWAIT_SAS_SPEED_EN);
|
|
|
|
iphy->protocol = SAS_PROTOCOL_SSP;
|
|
}
|
|
|
|
static void sci_phy_start_sata_link_training(struct isci_phy *iphy)
|
|
{
|
|
/* This method continues the link training for the phy as if it were a SATA PHY
|
|
* instead of a SAS PHY. This is done because the completion queue had a SATA
|
|
* SPINUP HOLD event when the state machine was expecting a SAS PHY event. none
|
|
*/
|
|
sci_change_state(&iphy->sm, SCI_PHY_SUB_AWAIT_SATA_POWER);
|
|
|
|
iphy->protocol = SAS_PROTOCOL_SATA;
|
|
}
|
|
|
|
/**
|
|
* sci_phy_complete_link_training - perform processing common to
|
|
* all protocols upon completion of link training.
|
|
* @sci_phy: This parameter specifies the phy object for which link training
|
|
* has completed.
|
|
* @max_link_rate: This parameter specifies the maximum link rate to be
|
|
* associated with this phy.
|
|
* @next_state: This parameter specifies the next state for the phy's starting
|
|
* sub-state machine.
|
|
*
|
|
*/
|
|
static void sci_phy_complete_link_training(struct isci_phy *iphy,
|
|
enum sas_linkrate max_link_rate,
|
|
u32 next_state)
|
|
{
|
|
iphy->max_negotiated_speed = max_link_rate;
|
|
|
|
sci_change_state(&iphy->sm, next_state);
|
|
}
|
|
|
|
static const char *phy_event_name(u32 event_code)
|
|
{
|
|
switch (scu_get_event_code(event_code)) {
|
|
case SCU_EVENT_PORT_SELECTOR_DETECTED:
|
|
return "port selector";
|
|
case SCU_EVENT_SENT_PORT_SELECTION:
|
|
return "port selection";
|
|
case SCU_EVENT_HARD_RESET_TRANSMITTED:
|
|
return "tx hard reset";
|
|
case SCU_EVENT_HARD_RESET_RECEIVED:
|
|
return "rx hard reset";
|
|
case SCU_EVENT_RECEIVED_IDENTIFY_TIMEOUT:
|
|
return "identify timeout";
|
|
case SCU_EVENT_LINK_FAILURE:
|
|
return "link fail";
|
|
case SCU_EVENT_SATA_SPINUP_HOLD:
|
|
return "sata spinup hold";
|
|
case SCU_EVENT_SAS_15_SSC:
|
|
case SCU_EVENT_SAS_15:
|
|
return "sas 1.5";
|
|
case SCU_EVENT_SAS_30_SSC:
|
|
case SCU_EVENT_SAS_30:
|
|
return "sas 3.0";
|
|
case SCU_EVENT_SAS_60_SSC:
|
|
case SCU_EVENT_SAS_60:
|
|
return "sas 6.0";
|
|
case SCU_EVENT_SATA_15_SSC:
|
|
case SCU_EVENT_SATA_15:
|
|
return "sata 1.5";
|
|
case SCU_EVENT_SATA_30_SSC:
|
|
case SCU_EVENT_SATA_30:
|
|
return "sata 3.0";
|
|
case SCU_EVENT_SATA_60_SSC:
|
|
case SCU_EVENT_SATA_60:
|
|
return "sata 6.0";
|
|
case SCU_EVENT_SAS_PHY_DETECTED:
|
|
return "sas detect";
|
|
case SCU_EVENT_SATA_PHY_DETECTED:
|
|
return "sata detect";
|
|
default:
|
|
return "unknown";
|
|
}
|
|
}
|
|
|
|
#define phy_event_dbg(iphy, state, code) \
|
|
dev_dbg(sciphy_to_dev(iphy), "phy-%d:%d: %s event: %s (%x)\n", \
|
|
phy_to_host(iphy)->id, iphy->phy_index, \
|
|
phy_state_name(state), phy_event_name(code), code)
|
|
|
|
#define phy_event_warn(iphy, state, code) \
|
|
dev_warn(sciphy_to_dev(iphy), "phy-%d:%d: %s event: %s (%x)\n", \
|
|
phy_to_host(iphy)->id, iphy->phy_index, \
|
|
phy_state_name(state), phy_event_name(code), code)
|
|
|
|
|
|
void scu_link_layer_set_txcomsas_timeout(struct isci_phy *iphy, u32 timeout)
|
|
{
|
|
u32 val;
|
|
|
|
/* Extend timeout */
|
|
val = readl(&iphy->link_layer_registers->transmit_comsas_signal);
|
|
val &= ~SCU_SAS_LLTXCOMSAS_GEN_VAL(NEGTIME, SCU_SAS_LINK_LAYER_TXCOMSAS_NEGTIME_MASK);
|
|
val |= SCU_SAS_LLTXCOMSAS_GEN_VAL(NEGTIME, timeout);
|
|
|
|
writel(val, &iphy->link_layer_registers->transmit_comsas_signal);
|
|
}
|
|
|
|
enum sci_status sci_phy_event_handler(struct isci_phy *iphy, u32 event_code)
|
|
{
|
|
enum sci_phy_states state = iphy->sm.current_state_id;
|
|
|
|
switch (state) {
|
|
case SCI_PHY_SUB_AWAIT_OSSP_EN:
|
|
switch (scu_get_event_code(event_code)) {
|
|
case SCU_EVENT_SAS_PHY_DETECTED:
|
|
sci_phy_start_sas_link_training(iphy);
|
|
iphy->is_in_link_training = true;
|
|
break;
|
|
case SCU_EVENT_SATA_SPINUP_HOLD:
|
|
sci_phy_start_sata_link_training(iphy);
|
|
iphy->is_in_link_training = true;
|
|
break;
|
|
case SCU_EVENT_RECEIVED_IDENTIFY_TIMEOUT:
|
|
/* Extend timeout value */
|
|
scu_link_layer_set_txcomsas_timeout(iphy, SCU_SAS_LINK_LAYER_TXCOMSAS_NEGTIME_EXTENDED);
|
|
|
|
/* Start the oob/sn state machine over again */
|
|
sci_change_state(&iphy->sm, SCI_PHY_STARTING);
|
|
break;
|
|
default:
|
|
phy_event_dbg(iphy, state, event_code);
|
|
return SCI_FAILURE;
|
|
}
|
|
return SCI_SUCCESS;
|
|
case SCI_PHY_SUB_AWAIT_SAS_SPEED_EN:
|
|
switch (scu_get_event_code(event_code)) {
|
|
case SCU_EVENT_SAS_PHY_DETECTED:
|
|
/*
|
|
* Why is this being reported again by the controller?
|
|
* We would re-enter this state so just stay here */
|
|
break;
|
|
case SCU_EVENT_SAS_15:
|
|
case SCU_EVENT_SAS_15_SSC:
|
|
sci_phy_complete_link_training(iphy, SAS_LINK_RATE_1_5_GBPS,
|
|
SCI_PHY_SUB_AWAIT_IAF_UF);
|
|
break;
|
|
case SCU_EVENT_SAS_30:
|
|
case SCU_EVENT_SAS_30_SSC:
|
|
sci_phy_complete_link_training(iphy, SAS_LINK_RATE_3_0_GBPS,
|
|
SCI_PHY_SUB_AWAIT_IAF_UF);
|
|
break;
|
|
case SCU_EVENT_SAS_60:
|
|
case SCU_EVENT_SAS_60_SSC:
|
|
sci_phy_complete_link_training(iphy, SAS_LINK_RATE_6_0_GBPS,
|
|
SCI_PHY_SUB_AWAIT_IAF_UF);
|
|
break;
|
|
case SCU_EVENT_SATA_SPINUP_HOLD:
|
|
/*
|
|
* We were doing SAS PHY link training and received a SATA PHY event
|
|
* continue OOB/SN as if this were a SATA PHY */
|
|
sci_phy_start_sata_link_training(iphy);
|
|
break;
|
|
case SCU_EVENT_LINK_FAILURE:
|
|
/* Change the timeout value to default */
|
|
scu_link_layer_set_txcomsas_timeout(iphy, SCU_SAS_LINK_LAYER_TXCOMSAS_NEGTIME_DEFAULT);
|
|
|
|
/* Link failure change state back to the starting state */
|
|
sci_change_state(&iphy->sm, SCI_PHY_STARTING);
|
|
break;
|
|
case SCU_EVENT_RECEIVED_IDENTIFY_TIMEOUT:
|
|
/* Extend the timeout value */
|
|
scu_link_layer_set_txcomsas_timeout(iphy, SCU_SAS_LINK_LAYER_TXCOMSAS_NEGTIME_EXTENDED);
|
|
|
|
/* Start the oob/sn state machine over again */
|
|
sci_change_state(&iphy->sm, SCI_PHY_STARTING);
|
|
break;
|
|
default:
|
|
phy_event_warn(iphy, state, event_code);
|
|
return SCI_FAILURE;
|
|
break;
|
|
}
|
|
return SCI_SUCCESS;
|
|
case SCI_PHY_SUB_AWAIT_IAF_UF:
|
|
switch (scu_get_event_code(event_code)) {
|
|
case SCU_EVENT_SAS_PHY_DETECTED:
|
|
/* Backup the state machine */
|
|
sci_phy_start_sas_link_training(iphy);
|
|
break;
|
|
case SCU_EVENT_SATA_SPINUP_HOLD:
|
|
/* We were doing SAS PHY link training and received a
|
|
* SATA PHY event continue OOB/SN as if this were a
|
|
* SATA PHY
|
|
*/
|
|
sci_phy_start_sata_link_training(iphy);
|
|
break;
|
|
case SCU_EVENT_RECEIVED_IDENTIFY_TIMEOUT:
|
|
/* Extend the timeout value */
|
|
scu_link_layer_set_txcomsas_timeout(iphy, SCU_SAS_LINK_LAYER_TXCOMSAS_NEGTIME_EXTENDED);
|
|
|
|
/* Start the oob/sn state machine over again */
|
|
sci_change_state(&iphy->sm, SCI_PHY_STARTING);
|
|
break;
|
|
case SCU_EVENT_LINK_FAILURE:
|
|
scu_link_layer_set_txcomsas_timeout(iphy, SCU_SAS_LINK_LAYER_TXCOMSAS_NEGTIME_DEFAULT);
|
|
case SCU_EVENT_HARD_RESET_RECEIVED:
|
|
/* Start the oob/sn state machine over again */
|
|
sci_change_state(&iphy->sm, SCI_PHY_STARTING);
|
|
break;
|
|
default:
|
|
phy_event_warn(iphy, state, event_code);
|
|
return SCI_FAILURE;
|
|
}
|
|
return SCI_SUCCESS;
|
|
case SCI_PHY_SUB_AWAIT_SAS_POWER:
|
|
switch (scu_get_event_code(event_code)) {
|
|
case SCU_EVENT_LINK_FAILURE:
|
|
/* Change the timeout value to default */
|
|
scu_link_layer_set_txcomsas_timeout(iphy, SCU_SAS_LINK_LAYER_TXCOMSAS_NEGTIME_DEFAULT);
|
|
|
|
/* Link failure change state back to the starting state */
|
|
sci_change_state(&iphy->sm, SCI_PHY_STARTING);
|
|
break;
|
|
default:
|
|
phy_event_warn(iphy, state, event_code);
|
|
return SCI_FAILURE;
|
|
}
|
|
return SCI_SUCCESS;
|
|
case SCI_PHY_SUB_AWAIT_SATA_POWER:
|
|
switch (scu_get_event_code(event_code)) {
|
|
case SCU_EVENT_LINK_FAILURE:
|
|
/* Change the timeout value to default */
|
|
scu_link_layer_set_txcomsas_timeout(iphy, SCU_SAS_LINK_LAYER_TXCOMSAS_NEGTIME_DEFAULT);
|
|
|
|
/* Link failure change state back to the starting state */
|
|
sci_change_state(&iphy->sm, SCI_PHY_STARTING);
|
|
break;
|
|
case SCU_EVENT_SATA_SPINUP_HOLD:
|
|
/* These events are received every 10ms and are
|
|
* expected while in this state
|
|
*/
|
|
break;
|
|
|
|
case SCU_EVENT_SAS_PHY_DETECTED:
|
|
/* There has been a change in the phy type before OOB/SN for the
|
|
* SATA finished start down the SAS link traning path.
|
|
*/
|
|
sci_phy_start_sas_link_training(iphy);
|
|
break;
|
|
|
|
default:
|
|
phy_event_warn(iphy, state, event_code);
|
|
return SCI_FAILURE;
|
|
}
|
|
return SCI_SUCCESS;
|
|
case SCI_PHY_SUB_AWAIT_SATA_PHY_EN:
|
|
switch (scu_get_event_code(event_code)) {
|
|
case SCU_EVENT_LINK_FAILURE:
|
|
/* Change the timeout value to default */
|
|
scu_link_layer_set_txcomsas_timeout(iphy, SCU_SAS_LINK_LAYER_TXCOMSAS_NEGTIME_DEFAULT);
|
|
|
|
/* Link failure change state back to the starting state */
|
|
sci_change_state(&iphy->sm, SCI_PHY_STARTING);
|
|
break;
|
|
case SCU_EVENT_SATA_SPINUP_HOLD:
|
|
/* These events might be received since we dont know how many may be in
|
|
* the completion queue while waiting for power
|
|
*/
|
|
break;
|
|
case SCU_EVENT_SATA_PHY_DETECTED:
|
|
iphy->protocol = SAS_PROTOCOL_SATA;
|
|
|
|
/* We have received the SATA PHY notification change state */
|
|
sci_change_state(&iphy->sm, SCI_PHY_SUB_AWAIT_SATA_SPEED_EN);
|
|
break;
|
|
case SCU_EVENT_SAS_PHY_DETECTED:
|
|
/* There has been a change in the phy type before OOB/SN for the
|
|
* SATA finished start down the SAS link traning path.
|
|
*/
|
|
sci_phy_start_sas_link_training(iphy);
|
|
break;
|
|
default:
|
|
phy_event_warn(iphy, state, event_code);
|
|
return SCI_FAILURE;
|
|
}
|
|
return SCI_SUCCESS;
|
|
case SCI_PHY_SUB_AWAIT_SATA_SPEED_EN:
|
|
switch (scu_get_event_code(event_code)) {
|
|
case SCU_EVENT_SATA_PHY_DETECTED:
|
|
/*
|
|
* The hardware reports multiple SATA PHY detected events
|
|
* ignore the extras */
|
|
break;
|
|
case SCU_EVENT_SATA_15:
|
|
case SCU_EVENT_SATA_15_SSC:
|
|
sci_phy_complete_link_training(iphy, SAS_LINK_RATE_1_5_GBPS,
|
|
SCI_PHY_SUB_AWAIT_SIG_FIS_UF);
|
|
break;
|
|
case SCU_EVENT_SATA_30:
|
|
case SCU_EVENT_SATA_30_SSC:
|
|
sci_phy_complete_link_training(iphy, SAS_LINK_RATE_3_0_GBPS,
|
|
SCI_PHY_SUB_AWAIT_SIG_FIS_UF);
|
|
break;
|
|
case SCU_EVENT_SATA_60:
|
|
case SCU_EVENT_SATA_60_SSC:
|
|
sci_phy_complete_link_training(iphy, SAS_LINK_RATE_6_0_GBPS,
|
|
SCI_PHY_SUB_AWAIT_SIG_FIS_UF);
|
|
break;
|
|
case SCU_EVENT_LINK_FAILURE:
|
|
/* Change the timeout value to default */
|
|
scu_link_layer_set_txcomsas_timeout(iphy, SCU_SAS_LINK_LAYER_TXCOMSAS_NEGTIME_DEFAULT);
|
|
|
|
/* Link failure change state back to the starting state */
|
|
sci_change_state(&iphy->sm, SCI_PHY_STARTING);
|
|
break;
|
|
case SCU_EVENT_SAS_PHY_DETECTED:
|
|
/*
|
|
* There has been a change in the phy type before OOB/SN for the
|
|
* SATA finished start down the SAS link traning path. */
|
|
sci_phy_start_sas_link_training(iphy);
|
|
break;
|
|
default:
|
|
phy_event_warn(iphy, state, event_code);
|
|
return SCI_FAILURE;
|
|
}
|
|
|
|
return SCI_SUCCESS;
|
|
case SCI_PHY_SUB_AWAIT_SIG_FIS_UF:
|
|
switch (scu_get_event_code(event_code)) {
|
|
case SCU_EVENT_SATA_PHY_DETECTED:
|
|
/* Backup the state machine */
|
|
sci_change_state(&iphy->sm, SCI_PHY_SUB_AWAIT_SATA_SPEED_EN);
|
|
break;
|
|
|
|
case SCU_EVENT_LINK_FAILURE:
|
|
/* Change the timeout value to default */
|
|
scu_link_layer_set_txcomsas_timeout(iphy, SCU_SAS_LINK_LAYER_TXCOMSAS_NEGTIME_DEFAULT);
|
|
|
|
/* Link failure change state back to the starting state */
|
|
sci_change_state(&iphy->sm, SCI_PHY_STARTING);
|
|
break;
|
|
|
|
default:
|
|
phy_event_warn(iphy, state, event_code);
|
|
return SCI_FAILURE;
|
|
}
|
|
return SCI_SUCCESS;
|
|
case SCI_PHY_READY:
|
|
switch (scu_get_event_code(event_code)) {
|
|
case SCU_EVENT_LINK_FAILURE:
|
|
/* Set default timeout */
|
|
scu_link_layer_set_txcomsas_timeout(iphy, SCU_SAS_LINK_LAYER_TXCOMSAS_NEGTIME_DEFAULT);
|
|
|
|
/* Link failure change state back to the starting state */
|
|
sci_change_state(&iphy->sm, SCI_PHY_STARTING);
|
|
break;
|
|
case SCU_EVENT_BROADCAST_CHANGE:
|
|
case SCU_EVENT_BROADCAST_SES:
|
|
case SCU_EVENT_BROADCAST_RESERVED0:
|
|
case SCU_EVENT_BROADCAST_RESERVED1:
|
|
case SCU_EVENT_BROADCAST_EXPANDER:
|
|
case SCU_EVENT_BROADCAST_AEN:
|
|
/* Broadcast change received. Notify the port. */
|
|
if (phy_get_non_dummy_port(iphy) != NULL)
|
|
sci_port_broadcast_change_received(iphy->owning_port, iphy);
|
|
else
|
|
iphy->bcn_received_while_port_unassigned = true;
|
|
break;
|
|
case SCU_EVENT_BROADCAST_RESERVED3:
|
|
case SCU_EVENT_BROADCAST_RESERVED4:
|
|
default:
|
|
phy_event_warn(iphy, state, event_code);
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
return SCI_SUCCESS;
|
|
case SCI_PHY_RESETTING:
|
|
switch (scu_get_event_code(event_code)) {
|
|
case SCU_EVENT_HARD_RESET_TRANSMITTED:
|
|
/* Link failure change state back to the starting state */
|
|
sci_change_state(&iphy->sm, SCI_PHY_STARTING);
|
|
break;
|
|
default:
|
|
phy_event_warn(iphy, state, event_code);
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
break;
|
|
}
|
|
return SCI_SUCCESS;
|
|
default:
|
|
dev_dbg(sciphy_to_dev(iphy), "%s: in wrong state: %s\n",
|
|
__func__, phy_state_name(state));
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
}
|
|
|
|
enum sci_status sci_phy_frame_handler(struct isci_phy *iphy, u32 frame_index)
|
|
{
|
|
enum sci_phy_states state = iphy->sm.current_state_id;
|
|
struct isci_host *ihost = iphy->owning_port->owning_controller;
|
|
enum sci_status result;
|
|
unsigned long flags;
|
|
|
|
switch (state) {
|
|
case SCI_PHY_SUB_AWAIT_IAF_UF: {
|
|
u32 *frame_words;
|
|
struct sas_identify_frame iaf;
|
|
|
|
result = sci_unsolicited_frame_control_get_header(&ihost->uf_control,
|
|
frame_index,
|
|
(void **)&frame_words);
|
|
|
|
if (result != SCI_SUCCESS)
|
|
return result;
|
|
|
|
sci_swab32_cpy(&iaf, frame_words, sizeof(iaf) / sizeof(u32));
|
|
if (iaf.frame_type == 0) {
|
|
u32 state;
|
|
|
|
spin_lock_irqsave(&iphy->sas_phy.frame_rcvd_lock, flags);
|
|
memcpy(&iphy->frame_rcvd.iaf, &iaf, sizeof(iaf));
|
|
spin_unlock_irqrestore(&iphy->sas_phy.frame_rcvd_lock, flags);
|
|
if (iaf.smp_tport) {
|
|
/* We got the IAF for an expander PHY go to the final
|
|
* state since there are no power requirements for
|
|
* expander phys.
|
|
*/
|
|
state = SCI_PHY_SUB_FINAL;
|
|
} else {
|
|
/* We got the IAF we can now go to the await spinup
|
|
* semaphore state
|
|
*/
|
|
state = SCI_PHY_SUB_AWAIT_SAS_POWER;
|
|
}
|
|
sci_change_state(&iphy->sm, state);
|
|
result = SCI_SUCCESS;
|
|
} else
|
|
dev_warn(sciphy_to_dev(iphy),
|
|
"%s: PHY starting substate machine received "
|
|
"unexpected frame id %x\n",
|
|
__func__, frame_index);
|
|
|
|
sci_controller_release_frame(ihost, frame_index);
|
|
return result;
|
|
}
|
|
case SCI_PHY_SUB_AWAIT_SIG_FIS_UF: {
|
|
struct dev_to_host_fis *frame_header;
|
|
u32 *fis_frame_data;
|
|
|
|
result = sci_unsolicited_frame_control_get_header(&ihost->uf_control,
|
|
frame_index,
|
|
(void **)&frame_header);
|
|
|
|
if (result != SCI_SUCCESS)
|
|
return result;
|
|
|
|
if ((frame_header->fis_type == FIS_REGD2H) &&
|
|
!(frame_header->status & ATA_BUSY)) {
|
|
sci_unsolicited_frame_control_get_buffer(&ihost->uf_control,
|
|
frame_index,
|
|
(void **)&fis_frame_data);
|
|
|
|
spin_lock_irqsave(&iphy->sas_phy.frame_rcvd_lock, flags);
|
|
sci_controller_copy_sata_response(&iphy->frame_rcvd.fis,
|
|
frame_header,
|
|
fis_frame_data);
|
|
spin_unlock_irqrestore(&iphy->sas_phy.frame_rcvd_lock, flags);
|
|
|
|
/* got IAF we can now go to the await spinup semaphore state */
|
|
sci_change_state(&iphy->sm, SCI_PHY_SUB_FINAL);
|
|
|
|
result = SCI_SUCCESS;
|
|
} else
|
|
dev_warn(sciphy_to_dev(iphy),
|
|
"%s: PHY starting substate machine received "
|
|
"unexpected frame id %x\n",
|
|
__func__, frame_index);
|
|
|
|
/* Regardless of the result we are done with this frame with it */
|
|
sci_controller_release_frame(ihost, frame_index);
|
|
|
|
return result;
|
|
}
|
|
default:
|
|
dev_dbg(sciphy_to_dev(iphy), "%s: in wrong state: %s\n",
|
|
__func__, phy_state_name(state));
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
|
|
}
|
|
|
|
static void sci_phy_starting_initial_substate_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
|
|
|
|
/* This is just an temporary state go off to the starting state */
|
|
sci_change_state(&iphy->sm, SCI_PHY_SUB_AWAIT_OSSP_EN);
|
|
}
|
|
|
|
static void sci_phy_starting_await_sas_power_substate_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
|
|
struct isci_host *ihost = iphy->owning_port->owning_controller;
|
|
|
|
sci_controller_power_control_queue_insert(ihost, iphy);
|
|
}
|
|
|
|
static void sci_phy_starting_await_sas_power_substate_exit(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
|
|
struct isci_host *ihost = iphy->owning_port->owning_controller;
|
|
|
|
sci_controller_power_control_queue_remove(ihost, iphy);
|
|
}
|
|
|
|
static void sci_phy_starting_await_sata_power_substate_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
|
|
struct isci_host *ihost = iphy->owning_port->owning_controller;
|
|
|
|
sci_controller_power_control_queue_insert(ihost, iphy);
|
|
}
|
|
|
|
static void sci_phy_starting_await_sata_power_substate_exit(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
|
|
struct isci_host *ihost = iphy->owning_port->owning_controller;
|
|
|
|
sci_controller_power_control_queue_remove(ihost, iphy);
|
|
}
|
|
|
|
static void sci_phy_starting_await_sata_phy_substate_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
|
|
|
|
sci_mod_timer(&iphy->sata_timer, SCIC_SDS_SATA_LINK_TRAINING_TIMEOUT);
|
|
}
|
|
|
|
static void sci_phy_starting_await_sata_phy_substate_exit(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
|
|
|
|
sci_del_timer(&iphy->sata_timer);
|
|
}
|
|
|
|
static void sci_phy_starting_await_sata_speed_substate_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
|
|
|
|
sci_mod_timer(&iphy->sata_timer, SCIC_SDS_SATA_LINK_TRAINING_TIMEOUT);
|
|
}
|
|
|
|
static void sci_phy_starting_await_sata_speed_substate_exit(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
|
|
|
|
sci_del_timer(&iphy->sata_timer);
|
|
}
|
|
|
|
static void sci_phy_starting_await_sig_fis_uf_substate_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
|
|
|
|
if (sci_port_link_detected(iphy->owning_port, iphy)) {
|
|
|
|
/*
|
|
* Clear the PE suspend condition so we can actually
|
|
* receive SIG FIS
|
|
* The hardware will not respond to the XRDY until the PE
|
|
* suspend condition is cleared.
|
|
*/
|
|
sci_phy_resume(iphy);
|
|
|
|
sci_mod_timer(&iphy->sata_timer,
|
|
SCIC_SDS_SIGNATURE_FIS_TIMEOUT);
|
|
} else
|
|
iphy->is_in_link_training = false;
|
|
}
|
|
|
|
static void sci_phy_starting_await_sig_fis_uf_substate_exit(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
|
|
|
|
sci_del_timer(&iphy->sata_timer);
|
|
}
|
|
|
|
static void sci_phy_starting_final_substate_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
|
|
|
|
/* State machine has run to completion so exit out and change
|
|
* the base state machine to the ready state
|
|
*/
|
|
sci_change_state(&iphy->sm, SCI_PHY_READY);
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @sci_phy: This is the struct isci_phy object to stop.
|
|
*
|
|
* This method will stop the struct isci_phy object. This does not reset the
|
|
* protocol engine it just suspends it and places it in a state where it will
|
|
* not cause the end device to power up. none
|
|
*/
|
|
static void scu_link_layer_stop_protocol_engine(
|
|
struct isci_phy *iphy)
|
|
{
|
|
u32 scu_sas_pcfg_value;
|
|
u32 enable_spinup_value;
|
|
|
|
/* Suspend the protocol engine and place it in a sata spinup hold state */
|
|
scu_sas_pcfg_value =
|
|
readl(&iphy->link_layer_registers->phy_configuration);
|
|
scu_sas_pcfg_value |=
|
|
(SCU_SAS_PCFG_GEN_BIT(OOB_RESET) |
|
|
SCU_SAS_PCFG_GEN_BIT(SUSPEND_PROTOCOL_ENGINE) |
|
|
SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD));
|
|
writel(scu_sas_pcfg_value,
|
|
&iphy->link_layer_registers->phy_configuration);
|
|
|
|
/* Disable the notify enable spinup primitives */
|
|
enable_spinup_value = readl(&iphy->link_layer_registers->notify_enable_spinup_control);
|
|
enable_spinup_value &= ~SCU_ENSPINUP_GEN_BIT(ENABLE);
|
|
writel(enable_spinup_value, &iphy->link_layer_registers->notify_enable_spinup_control);
|
|
}
|
|
|
|
static void scu_link_layer_start_oob(struct isci_phy *iphy)
|
|
{
|
|
struct scu_link_layer_registers __iomem *ll = iphy->link_layer_registers;
|
|
u32 val;
|
|
|
|
/** Reset OOB sequence - start */
|
|
val = readl(&ll->phy_configuration);
|
|
val &= ~(SCU_SAS_PCFG_GEN_BIT(OOB_RESET) |
|
|
SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE) |
|
|
SCU_SAS_PCFG_GEN_BIT(HARD_RESET));
|
|
writel(val, &ll->phy_configuration);
|
|
readl(&ll->phy_configuration); /* flush */
|
|
/** Reset OOB sequence - end */
|
|
|
|
/** Start OOB sequence - start */
|
|
val = readl(&ll->phy_configuration);
|
|
val |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE);
|
|
writel(val, &ll->phy_configuration);
|
|
readl(&ll->phy_configuration); /* flush */
|
|
/** Start OOB sequence - end */
|
|
}
|
|
|
|
/**
|
|
*
|
|
*
|
|
* This method will transmit a hard reset request on the specified phy. The SCU
|
|
* hardware requires that we reset the OOB state machine and set the hard reset
|
|
* bit in the phy configuration register. We then must start OOB over with the
|
|
* hard reset bit set.
|
|
*/
|
|
static void scu_link_layer_tx_hard_reset(
|
|
struct isci_phy *iphy)
|
|
{
|
|
u32 phy_configuration_value;
|
|
|
|
/*
|
|
* SAS Phys must wait for the HARD_RESET_TX event notification to transition
|
|
* to the starting state. */
|
|
phy_configuration_value =
|
|
readl(&iphy->link_layer_registers->phy_configuration);
|
|
phy_configuration_value &= ~(SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE));
|
|
phy_configuration_value |=
|
|
(SCU_SAS_PCFG_GEN_BIT(HARD_RESET) |
|
|
SCU_SAS_PCFG_GEN_BIT(OOB_RESET));
|
|
writel(phy_configuration_value,
|
|
&iphy->link_layer_registers->phy_configuration);
|
|
|
|
/* Now take the OOB state machine out of reset */
|
|
phy_configuration_value |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE);
|
|
phy_configuration_value &= ~SCU_SAS_PCFG_GEN_BIT(OOB_RESET);
|
|
writel(phy_configuration_value,
|
|
&iphy->link_layer_registers->phy_configuration);
|
|
}
|
|
|
|
static void sci_phy_stopped_state_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
|
|
struct isci_port *iport = iphy->owning_port;
|
|
struct isci_host *ihost = iport->owning_controller;
|
|
|
|
/*
|
|
* @todo We need to get to the controller to place this PE in a
|
|
* reset state
|
|
*/
|
|
sci_del_timer(&iphy->sata_timer);
|
|
|
|
scu_link_layer_stop_protocol_engine(iphy);
|
|
|
|
if (iphy->sm.previous_state_id != SCI_PHY_INITIAL)
|
|
sci_controller_link_down(ihost, phy_get_non_dummy_port(iphy), iphy);
|
|
}
|
|
|
|
static void sci_phy_starting_state_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
|
|
struct isci_port *iport = iphy->owning_port;
|
|
struct isci_host *ihost = iport->owning_controller;
|
|
|
|
scu_link_layer_stop_protocol_engine(iphy);
|
|
scu_link_layer_start_oob(iphy);
|
|
|
|
/* We don't know what kind of phy we are going to be just yet */
|
|
iphy->protocol = SAS_PROTOCOL_NONE;
|
|
iphy->bcn_received_while_port_unassigned = false;
|
|
|
|
if (iphy->sm.previous_state_id == SCI_PHY_READY)
|
|
sci_controller_link_down(ihost, phy_get_non_dummy_port(iphy), iphy);
|
|
|
|
sci_change_state(&iphy->sm, SCI_PHY_SUB_INITIAL);
|
|
}
|
|
|
|
static void sci_phy_ready_state_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
|
|
struct isci_port *iport = iphy->owning_port;
|
|
struct isci_host *ihost = iport->owning_controller;
|
|
|
|
sci_controller_link_up(ihost, phy_get_non_dummy_port(iphy), iphy);
|
|
}
|
|
|
|
static void sci_phy_ready_state_exit(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
|
|
|
|
sci_phy_suspend(iphy);
|
|
}
|
|
|
|
static void sci_phy_resetting_state_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
|
|
|
|
/* The phy is being reset, therefore deactivate it from the port. In
|
|
* the resetting state we don't notify the user regarding link up and
|
|
* link down notifications
|
|
*/
|
|
sci_port_deactivate_phy(iphy->owning_port, iphy, false);
|
|
|
|
if (iphy->protocol == SAS_PROTOCOL_SSP) {
|
|
scu_link_layer_tx_hard_reset(iphy);
|
|
} else {
|
|
/* The SCU does not need to have a discrete reset state so
|
|
* just go back to the starting state.
|
|
*/
|
|
sci_change_state(&iphy->sm, SCI_PHY_STARTING);
|
|
}
|
|
}
|
|
|
|
static const struct sci_base_state sci_phy_state_table[] = {
|
|
[SCI_PHY_INITIAL] = { },
|
|
[SCI_PHY_STOPPED] = {
|
|
.enter_state = sci_phy_stopped_state_enter,
|
|
},
|
|
[SCI_PHY_STARTING] = {
|
|
.enter_state = sci_phy_starting_state_enter,
|
|
},
|
|
[SCI_PHY_SUB_INITIAL] = {
|
|
.enter_state = sci_phy_starting_initial_substate_enter,
|
|
},
|
|
[SCI_PHY_SUB_AWAIT_OSSP_EN] = { },
|
|
[SCI_PHY_SUB_AWAIT_SAS_SPEED_EN] = { },
|
|
[SCI_PHY_SUB_AWAIT_IAF_UF] = { },
|
|
[SCI_PHY_SUB_AWAIT_SAS_POWER] = {
|
|
.enter_state = sci_phy_starting_await_sas_power_substate_enter,
|
|
.exit_state = sci_phy_starting_await_sas_power_substate_exit,
|
|
},
|
|
[SCI_PHY_SUB_AWAIT_SATA_POWER] = {
|
|
.enter_state = sci_phy_starting_await_sata_power_substate_enter,
|
|
.exit_state = sci_phy_starting_await_sata_power_substate_exit
|
|
},
|
|
[SCI_PHY_SUB_AWAIT_SATA_PHY_EN] = {
|
|
.enter_state = sci_phy_starting_await_sata_phy_substate_enter,
|
|
.exit_state = sci_phy_starting_await_sata_phy_substate_exit
|
|
},
|
|
[SCI_PHY_SUB_AWAIT_SATA_SPEED_EN] = {
|
|
.enter_state = sci_phy_starting_await_sata_speed_substate_enter,
|
|
.exit_state = sci_phy_starting_await_sata_speed_substate_exit
|
|
},
|
|
[SCI_PHY_SUB_AWAIT_SIG_FIS_UF] = {
|
|
.enter_state = sci_phy_starting_await_sig_fis_uf_substate_enter,
|
|
.exit_state = sci_phy_starting_await_sig_fis_uf_substate_exit
|
|
},
|
|
[SCI_PHY_SUB_FINAL] = {
|
|
.enter_state = sci_phy_starting_final_substate_enter,
|
|
},
|
|
[SCI_PHY_READY] = {
|
|
.enter_state = sci_phy_ready_state_enter,
|
|
.exit_state = sci_phy_ready_state_exit,
|
|
},
|
|
[SCI_PHY_RESETTING] = {
|
|
.enter_state = sci_phy_resetting_state_enter,
|
|
},
|
|
[SCI_PHY_FINAL] = { },
|
|
};
|
|
|
|
void sci_phy_construct(struct isci_phy *iphy,
|
|
struct isci_port *iport, u8 phy_index)
|
|
{
|
|
sci_init_sm(&iphy->sm, sci_phy_state_table, SCI_PHY_INITIAL);
|
|
|
|
/* Copy the rest of the input data to our locals */
|
|
iphy->owning_port = iport;
|
|
iphy->phy_index = phy_index;
|
|
iphy->bcn_received_while_port_unassigned = false;
|
|
iphy->protocol = SAS_PROTOCOL_NONE;
|
|
iphy->link_layer_registers = NULL;
|
|
iphy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN;
|
|
|
|
/* Create the SIGNATURE FIS Timeout timer for this phy */
|
|
sci_init_timer(&iphy->sata_timer, phy_sata_timeout);
|
|
}
|
|
|
|
void isci_phy_init(struct isci_phy *iphy, struct isci_host *ihost, int index)
|
|
{
|
|
struct sci_oem_params *oem = &ihost->oem_parameters;
|
|
u64 sci_sas_addr;
|
|
__be64 sas_addr;
|
|
|
|
sci_sas_addr = oem->phys[index].sas_address.high;
|
|
sci_sas_addr <<= 32;
|
|
sci_sas_addr |= oem->phys[index].sas_address.low;
|
|
sas_addr = cpu_to_be64(sci_sas_addr);
|
|
memcpy(iphy->sas_addr, &sas_addr, sizeof(sas_addr));
|
|
|
|
iphy->sas_phy.enabled = 0;
|
|
iphy->sas_phy.id = index;
|
|
iphy->sas_phy.sas_addr = &iphy->sas_addr[0];
|
|
iphy->sas_phy.frame_rcvd = (u8 *)&iphy->frame_rcvd;
|
|
iphy->sas_phy.ha = &ihost->sas_ha;
|
|
iphy->sas_phy.lldd_phy = iphy;
|
|
iphy->sas_phy.enabled = 1;
|
|
iphy->sas_phy.class = SAS;
|
|
iphy->sas_phy.iproto = SAS_PROTOCOL_ALL;
|
|
iphy->sas_phy.tproto = 0;
|
|
iphy->sas_phy.type = PHY_TYPE_PHYSICAL;
|
|
iphy->sas_phy.role = PHY_ROLE_INITIATOR;
|
|
iphy->sas_phy.oob_mode = OOB_NOT_CONNECTED;
|
|
iphy->sas_phy.linkrate = SAS_LINK_RATE_UNKNOWN;
|
|
memset(&iphy->frame_rcvd, 0, sizeof(iphy->frame_rcvd));
|
|
}
|
|
|
|
|
|
/**
|
|
* isci_phy_control() - This function is one of the SAS Domain Template
|
|
* functions. This is a phy management function.
|
|
* @phy: This parameter specifies the sphy being controlled.
|
|
* @func: This parameter specifies the phy control function being invoked.
|
|
* @buf: This parameter is specific to the phy function being invoked.
|
|
*
|
|
* status, zero indicates success.
|
|
*/
|
|
int isci_phy_control(struct asd_sas_phy *sas_phy,
|
|
enum phy_func func,
|
|
void *buf)
|
|
{
|
|
int ret = 0;
|
|
struct isci_phy *iphy = sas_phy->lldd_phy;
|
|
struct asd_sas_port *port = sas_phy->port;
|
|
struct isci_host *ihost = sas_phy->ha->lldd_ha;
|
|
unsigned long flags;
|
|
|
|
dev_dbg(&ihost->pdev->dev,
|
|
"%s: phy %p; func %d; buf %p; isci phy %p, port %p\n",
|
|
__func__, sas_phy, func, buf, iphy, port);
|
|
|
|
switch (func) {
|
|
case PHY_FUNC_DISABLE:
|
|
spin_lock_irqsave(&ihost->scic_lock, flags);
|
|
scu_link_layer_start_oob(iphy);
|
|
sci_phy_stop(iphy);
|
|
spin_unlock_irqrestore(&ihost->scic_lock, flags);
|
|
break;
|
|
|
|
case PHY_FUNC_LINK_RESET:
|
|
spin_lock_irqsave(&ihost->scic_lock, flags);
|
|
scu_link_layer_start_oob(iphy);
|
|
sci_phy_stop(iphy);
|
|
sci_phy_start(iphy);
|
|
spin_unlock_irqrestore(&ihost->scic_lock, flags);
|
|
break;
|
|
|
|
case PHY_FUNC_HARD_RESET:
|
|
if (!port)
|
|
return -ENODEV;
|
|
|
|
ret = isci_port_perform_hard_reset(ihost, port->lldd_port, iphy);
|
|
|
|
break;
|
|
case PHY_FUNC_GET_EVENTS: {
|
|
struct scu_link_layer_registers __iomem *r;
|
|
struct sas_phy *phy = sas_phy->phy;
|
|
|
|
r = iphy->link_layer_registers;
|
|
phy->running_disparity_error_count = readl(&r->running_disparity_error_count);
|
|
phy->loss_of_dword_sync_count = readl(&r->loss_of_sync_error_count);
|
|
phy->phy_reset_problem_count = readl(&r->phy_reset_problem_count);
|
|
phy->invalid_dword_count = readl(&r->invalid_dword_counter);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
dev_dbg(&ihost->pdev->dev,
|
|
"%s: phy %p; func %d NOT IMPLEMENTED!\n",
|
|
__func__, sas_phy, func);
|
|
ret = -ENOSYS;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|