123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116111711181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152115311541155115611571158115911601161116211631164116511661167116811691170117111721173117411751176117711781179118011811182118311841185118611871188118911901191119211931194119511961197119811991200120112021203120412051206120712081209121012111212121312141215121612171218121912201221122212231224122512261227122812291230123112321233123412351236123712381239124012411242124312441245124612471248124912501251125212531254125512561257125812591260126112621263126412651266126712681269127012711272127312741275127612771278127912801281128212831284128512861287128812891290129112921293129412951296129712981299130013011302130313041305130613071308130913101311131213131314131513161317131813191320132113221323132413251326132713281329133013311332133313341335133613371338133913401341134213431344134513461347134813491350135113521353135413551356135713581359136013611362136313641365136613671368136913701371137213731374137513761377137813791380138113821383138413851386138713881389139013911392139313941395139613971398139914001401140214031404140514061407140814091410141114121413141414151416141714181419142014211422142314241425142614271428142914301431143214331434143514361437143814391440144114421443144414451446144714481449145014511452145314541455145614571458145914601461146214631464146514661467146814691470147114721473147414751476147714781479148014811482148314841485148614871488148914901491149214931494149514961497149814991500150115021503150415051506150715081509151015111512151315141515151615171518151915201521152215231524152515261527152815291530153115321533153415351536153715381539154015411542154315441545154615471548154915501551155215531554155515561557155815591560156115621563156415651566156715681569157015711572157315741575157615771578157915801581158215831584158515861587158815891590159115921593159415951596159715981599160016011602160316041605160616071608160916101611161216131614161516161617161816191620162116221623162416251626162716281629163016311632163316341635163616371638163916401641164216431644164516461647164816491650165116521653165416551656165716581659166016611662166316641665166616671668166916701671167216731674167516761677167816791680168116821683168416851686168716881689169016911692169316941695169616971698169917001701170217031704170517061707170817091710171117121713171417151716171717181719172017211722172317241725172617271728172917301731173217331734173517361737173817391740174117421743174417451746174717481749175017511752175317541755175617571758175917601761176217631764176517661767176817691770177117721773 |
- /*
- * This file is provided under a dual BSD/GPLv2 license. When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- * The full GNU General Public License is included in this distribution
- * in the file called LICENSE.GPL.
- *
- * BSD LICENSE
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #include "isci.h"
- #include "port.h"
- #include "request.h"
- #define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000)
- #define SCU_DUMMY_INDEX (0xFFFF)
- #undef C
- #define C(a) (#a)
- static const char *port_state_name(enum sci_port_states state)
- {
- static const char * const strings[] = PORT_STATES;
- return strings[state];
- }
- #undef C
- static struct device *sciport_to_dev(struct isci_port *iport)
- {
- int i = iport->physical_port_index;
- struct isci_port *table;
- struct isci_host *ihost;
- if (i == SCIC_SDS_DUMMY_PORT)
- i = SCI_MAX_PORTS+1;
- table = iport - i;
- ihost = container_of(table, typeof(*ihost), ports[0]);
- return &ihost->pdev->dev;
- }
- static void sci_port_get_protocols(struct isci_port *iport, struct sci_phy_proto *proto)
- {
- u8 index;
- proto->all = 0;
- for (index = 0; index < SCI_MAX_PHYS; index++) {
- struct isci_phy *iphy = iport->phy_table[index];
- if (!iphy)
- continue;
- sci_phy_get_protocols(iphy, proto);
- }
- }
- static u32 sci_port_get_phys(struct isci_port *iport)
- {
- u32 index;
- u32 mask;
- mask = 0;
- for (index = 0; index < SCI_MAX_PHYS; index++)
- if (iport->phy_table[index])
- mask |= (1 << index);
- return mask;
- }
- /**
- * sci_port_get_properties() - This method simply returns the properties
- * regarding the port, such as: physical index, protocols, sas address, etc.
- * @iport: this parameter specifies the port for which to retrieve the physical
- * index.
- * @prop: This parameter specifies the properties structure into which to
- * copy the requested information.
- *
- * Indicate if the user specified a valid port. SCI_SUCCESS This value is
- * returned if the specified port was valid. SCI_FAILURE_INVALID_PORT This
- * value is returned if the specified port is not valid. When this value is
- * returned, no data is copied to the properties output parameter.
- */
- enum sci_status sci_port_get_properties(struct isci_port *iport,
- struct sci_port_properties *prop)
- {
- if (!iport || iport->logical_port_index == SCIC_SDS_DUMMY_PORT)
- return SCI_FAILURE_INVALID_PORT;
- prop->index = iport->logical_port_index;
- prop->phy_mask = sci_port_get_phys(iport);
- sci_port_get_sas_address(iport, &prop->local.sas_address);
- sci_port_get_protocols(iport, &prop->local.protocols);
- sci_port_get_attached_sas_address(iport, &prop->remote.sas_address);
- return SCI_SUCCESS;
- }
- static void sci_port_bcn_enable(struct isci_port *iport)
- {
- struct isci_phy *iphy;
- u32 val;
- int i;
- for (i = 0; i < ARRAY_SIZE(iport->phy_table); i++) {
- iphy = iport->phy_table[i];
- if (!iphy)
- continue;
- val = readl(&iphy->link_layer_registers->link_layer_control);
- /* clear the bit by writing 1. */
- writel(val, &iphy->link_layer_registers->link_layer_control);
- }
- }
- static void isci_port_bc_change_received(struct isci_host *ihost,
- struct isci_port *iport,
- struct isci_phy *iphy)
- {
- dev_dbg(&ihost->pdev->dev,
- "%s: isci_phy = %p, sas_phy = %p\n",
- __func__, iphy, &iphy->sas_phy);
- sas_notify_port_event(&iphy->sas_phy,
- PORTE_BROADCAST_RCVD, GFP_ATOMIC);
- sci_port_bcn_enable(iport);
- }
- static void isci_port_link_up(struct isci_host *isci_host,
- struct isci_port *iport,
- struct isci_phy *iphy)
- {
- unsigned long flags;
- struct sci_port_properties properties;
- unsigned long success = true;
- dev_dbg(&isci_host->pdev->dev,
- "%s: isci_port = %p\n",
- __func__, iport);
- spin_lock_irqsave(&iphy->sas_phy.frame_rcvd_lock, flags);
- sci_port_get_properties(iport, &properties);
- if (iphy->protocol == SAS_PROTOCOL_SATA) {
- u64 attached_sas_address;
- iphy->sas_phy.oob_mode = SATA_OOB_MODE;
- iphy->sas_phy.frame_rcvd_size = sizeof(struct dev_to_host_fis);
- /*
- * For direct-attached SATA devices, the SCI core will
- * automagically assign a SAS address to the end device
- * for the purpose of creating a port. This SAS address
- * will not be the same as assigned to the PHY and needs
- * to be obtained from struct sci_port_properties properties.
- */
- attached_sas_address = properties.remote.sas_address.high;
- attached_sas_address <<= 32;
- attached_sas_address |= properties.remote.sas_address.low;
- swab64s(&attached_sas_address);
- memcpy(&iphy->sas_phy.attached_sas_addr,
- &attached_sas_address, sizeof(attached_sas_address));
- } else if (iphy->protocol == SAS_PROTOCOL_SSP) {
- iphy->sas_phy.oob_mode = SAS_OOB_MODE;
- iphy->sas_phy.frame_rcvd_size = sizeof(struct sas_identify_frame);
- /* Copy the attached SAS address from the IAF */
- memcpy(iphy->sas_phy.attached_sas_addr,
- iphy->frame_rcvd.iaf.sas_addr, SAS_ADDR_SIZE);
- } else {
- dev_err(&isci_host->pdev->dev, "%s: unknown target\n", __func__);
- success = false;
- }
- iphy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(iphy);
- spin_unlock_irqrestore(&iphy->sas_phy.frame_rcvd_lock, flags);
- /* Notify libsas that we have an address frame, if indeed
- * we've found an SSP, SMP, or STP target */
- if (success)
- sas_notify_port_event(&iphy->sas_phy,
- PORTE_BYTES_DMAED, GFP_ATOMIC);
- }
- /**
- * isci_port_link_down() - This function is called by the sci core when a link
- * becomes inactive.
- * @isci_host: This parameter specifies the isci host object.
- * @isci_phy: This parameter specifies the isci phy with the active link.
- * @isci_port: This parameter specifies the isci port with the active link.
- *
- */
- static void isci_port_link_down(struct isci_host *isci_host,
- struct isci_phy *isci_phy,
- struct isci_port *isci_port)
- {
- struct isci_remote_device *isci_device;
- dev_dbg(&isci_host->pdev->dev,
- "%s: isci_port = %p\n", __func__, isci_port);
- if (isci_port) {
- /* check to see if this is the last phy on this port. */
- if (isci_phy->sas_phy.port &&
- isci_phy->sas_phy.port->num_phys == 1) {
- /* change the state for all devices on this port. The
- * next task sent to this device will be returned as
- * SAS_TASK_UNDELIVERED, and the scsi mid layer will
- * remove the target
- */
- list_for_each_entry(isci_device,
- &isci_port->remote_dev_list,
- node) {
- dev_dbg(&isci_host->pdev->dev,
- "%s: isci_device = %p\n",
- __func__, isci_device);
- set_bit(IDEV_GONE, &isci_device->flags);
- }
- }
- }
- /* Notify libsas of the borken link, this will trigger calls to our
- * isci_port_deformed and isci_dev_gone functions.
- */
- sas_phy_disconnected(&isci_phy->sas_phy);
- sas_notify_phy_event(&isci_phy->sas_phy,
- PHYE_LOSS_OF_SIGNAL, GFP_ATOMIC);
- dev_dbg(&isci_host->pdev->dev,
- "%s: isci_port = %p - Done\n", __func__, isci_port);
- }
- static bool is_port_ready_state(enum sci_port_states state)
- {
- switch (state) {
- case SCI_PORT_READY:
- case SCI_PORT_SUB_WAITING:
- case SCI_PORT_SUB_OPERATIONAL:
- case SCI_PORT_SUB_CONFIGURING:
- return true;
- default:
- return false;
- }
- }
- /* flag dummy rnc hanling when exiting a ready state */
- static void port_state_machine_change(struct isci_port *iport,
- enum sci_port_states state)
- {
- struct sci_base_state_machine *sm = &iport->sm;
- enum sci_port_states old_state = sm->current_state_id;
- if (is_port_ready_state(old_state) && !is_port_ready_state(state))
- iport->ready_exit = true;
- sci_change_state(sm, state);
- iport->ready_exit = false;
- }
- /**
- * isci_port_hard_reset_complete() - This function is called by the sci core
- * when the hard reset complete notification has been received.
- * @isci_port: This parameter specifies the sci port with the active link.
- * @completion_status: This parameter specifies the core status for the reset
- * process.
- *
- */
- static void isci_port_hard_reset_complete(struct isci_port *isci_port,
- enum sci_status completion_status)
- {
- struct isci_host *ihost = isci_port->owning_controller;
- dev_dbg(&ihost->pdev->dev,
- "%s: isci_port = %p, completion_status=%x\n",
- __func__, isci_port, completion_status);
- /* Save the status of the hard reset from the port. */
- isci_port->hard_reset_status = completion_status;
- if (completion_status != SCI_SUCCESS) {
- /* The reset failed. The port state is now SCI_PORT_FAILED. */
- if (isci_port->active_phy_mask == 0) {
- int phy_idx = isci_port->last_active_phy;
- struct isci_phy *iphy = &ihost->phys[phy_idx];
- /* Generate the link down now to the host, since it
- * was intercepted by the hard reset state machine when
- * it really happened.
- */
- isci_port_link_down(ihost, iphy, isci_port);
- }
- /* Advance the port state so that link state changes will be
- * noticed.
- */
- port_state_machine_change(isci_port, SCI_PORT_SUB_WAITING);
- }
- clear_bit(IPORT_RESET_PENDING, &isci_port->state);
- wake_up(&ihost->eventq);
- }
- /* This method will return a true value if the specified phy can be assigned to
- * this port The following is a list of phys for each port that are allowed: -
- * Port 0 - 3 2 1 0 - Port 1 - 1 - Port 2 - 3 2 - Port 3 - 3 This method
- * doesn't preclude all configurations. It merely ensures that a phy is part
- * of the allowable set of phy identifiers for that port. For example, one
- * could assign phy 3 to port 0 and no other phys. Please refer to
- * sci_port_is_phy_mask_valid() for information regarding whether the
- * phy_mask for a port can be supported. bool true if this is a valid phy
- * assignment for the port false if this is not a valid phy assignment for the
- * port
- */
- bool sci_port_is_valid_phy_assignment(struct isci_port *iport, u32 phy_index)
- {
- struct isci_host *ihost = iport->owning_controller;
- struct sci_user_parameters *user = &ihost->user_parameters;
- /* Initialize to invalid value. */
- u32 existing_phy_index = SCI_MAX_PHYS;
- u32 index;
- if ((iport->physical_port_index == 1) && (phy_index != 1))
- return false;
- if (iport->physical_port_index == 3 && phy_index != 3)
- return false;
- if (iport->physical_port_index == 2 &&
- (phy_index == 0 || phy_index == 1))
- return false;
- for (index = 0; index < SCI_MAX_PHYS; index++)
- if (iport->phy_table[index] && index != phy_index)
- existing_phy_index = index;
- /* Ensure that all of the phys in the port are capable of
- * operating at the same maximum link rate.
- */
- if (existing_phy_index < SCI_MAX_PHYS &&
- user->phys[phy_index].max_speed_generation !=
- user->phys[existing_phy_index].max_speed_generation)
- return false;
- return true;
- }
- /**
- * sci_port_is_phy_mask_valid()
- * @iport: This is the port object for which to determine if the phy mask
- * can be supported.
- * @phy_mask: Phy mask belonging to this port
- *
- * This method will return a true value if the port's phy mask can be supported
- * by the SCU. The following is a list of valid PHY mask configurations for
- * each port: - Port 0 - [[3 2] 1] 0 - Port 1 - [1] - Port 2 - [[3] 2]
- * - Port 3 - [3] This method returns a boolean indication specifying if the
- * phy mask can be supported. true if this is a valid phy assignment for the
- * port false if this is not a valid phy assignment for the port
- */
- static bool sci_port_is_phy_mask_valid(
- struct isci_port *iport,
- u32 phy_mask)
- {
- if (iport->physical_port_index == 0) {
- if (((phy_mask & 0x0F) == 0x0F)
- || ((phy_mask & 0x03) == 0x03)
- || ((phy_mask & 0x01) == 0x01)
- || (phy_mask == 0))
- return true;
- } else if (iport->physical_port_index == 1) {
- if (((phy_mask & 0x02) == 0x02)
- || (phy_mask == 0))
- return true;
- } else if (iport->physical_port_index == 2) {
- if (((phy_mask & 0x0C) == 0x0C)
- || ((phy_mask & 0x04) == 0x04)
- || (phy_mask == 0))
- return true;
- } else if (iport->physical_port_index == 3) {
- if (((phy_mask & 0x08) == 0x08)
- || (phy_mask == 0))
- return true;
- }
- return false;
- }
- /*
- * This method retrieves a currently active (i.e. connected) phy contained in
- * the port. Currently, the lowest order phy that is connected is returned.
- * This method returns a pointer to a SCIS_SDS_PHY object. NULL This value is
- * returned if there are no currently active (i.e. connected to a remote end
- * point) phys contained in the port. All other values specify a struct sci_phy
- * object that is active in the port.
- */
- static struct isci_phy *sci_port_get_a_connected_phy(struct isci_port *iport)
- {
- u32 index;
- struct isci_phy *iphy;
- for (index = 0; index < SCI_MAX_PHYS; index++) {
- /* Ensure that the phy is both part of the port and currently
- * connected to the remote end-point.
- */
- iphy = iport->phy_table[index];
- if (iphy && sci_port_active_phy(iport, iphy))
- return iphy;
- }
- return NULL;
- }
- static enum sci_status sci_port_set_phy(struct isci_port *iport, struct isci_phy *iphy)
- {
- /* Check to see if we can add this phy to a port
- * that means that the phy is not part of a port and that the port does
- * not already have a phy assinged to the phy index.
- */
- if (!iport->phy_table[iphy->phy_index] &&
- !phy_get_non_dummy_port(iphy) &&
- sci_port_is_valid_phy_assignment(iport, iphy->phy_index)) {
- /* Phy is being added in the stopped state so we are in MPC mode
- * make logical port index = physical port index
- */
- iport->logical_port_index = iport->physical_port_index;
- iport->phy_table[iphy->phy_index] = iphy;
- sci_phy_set_port(iphy, iport);
- return SCI_SUCCESS;
- }
- return SCI_FAILURE;
- }
- static enum sci_status sci_port_clear_phy(struct isci_port *iport, struct isci_phy *iphy)
- {
- /* Make sure that this phy is part of this port */
- if (iport->phy_table[iphy->phy_index] == iphy &&
- phy_get_non_dummy_port(iphy) == iport) {
- struct isci_host *ihost = iport->owning_controller;
- /* Yep it is assigned to this port so remove it */
- sci_phy_set_port(iphy, &ihost->ports[SCI_MAX_PORTS]);
- iport->phy_table[iphy->phy_index] = NULL;
- return SCI_SUCCESS;
- }
- return SCI_FAILURE;
- }
- void sci_port_get_sas_address(struct isci_port *iport, struct sci_sas_address *sas)
- {
- u32 index;
- sas->high = 0;
- sas->low = 0;
- for (index = 0; index < SCI_MAX_PHYS; index++)
- if (iport->phy_table[index])
- sci_phy_get_sas_address(iport->phy_table[index], sas);
- }
- void sci_port_get_attached_sas_address(struct isci_port *iport, struct sci_sas_address *sas)
- {
- struct isci_phy *iphy;
- /*
- * Ensure that the phy is both part of the port and currently
- * connected to the remote end-point.
- */
- iphy = sci_port_get_a_connected_phy(iport);
- if (iphy) {
- if (iphy->protocol != SAS_PROTOCOL_SATA) {
- sci_phy_get_attached_sas_address(iphy, sas);
- } else {
- sci_phy_get_sas_address(iphy, sas);
- sas->low += iphy->phy_index;
- }
- } else {
- sas->high = 0;
- sas->low = 0;
- }
- }
- /**
- * sci_port_construct_dummy_rnc() - create dummy rnc for si workaround
- *
- * @iport: logical port on which we need to create the remote node context
- * @rni: remote node index for this remote node context.
- *
- * This routine will construct a dummy remote node context data structure
- * This structure will be posted to the hardware to work around a scheduler
- * error in the hardware.
- */
- static void sci_port_construct_dummy_rnc(struct isci_port *iport, u16 rni)
- {
- union scu_remote_node_context *rnc;
- rnc = &iport->owning_controller->remote_node_context_table[rni];
- memset(rnc, 0, sizeof(union scu_remote_node_context));
- rnc->ssp.remote_sas_address_hi = 0;
- rnc->ssp.remote_sas_address_lo = 0;
- rnc->ssp.remote_node_index = rni;
- rnc->ssp.remote_node_port_width = 1;
- rnc->ssp.logical_port_index = iport->physical_port_index;
- rnc->ssp.nexus_loss_timer_enable = false;
- rnc->ssp.check_bit = false;
- rnc->ssp.is_valid = true;
- rnc->ssp.is_remote_node_context = true;
- rnc->ssp.function_number = 0;
- rnc->ssp.arbitration_wait_time = 0;
- }
- /*
- * construct a dummy task context data structure. This
- * structure will be posted to the hardwre to work around a scheduler error
- * in the hardware.
- */
- static void sci_port_construct_dummy_task(struct isci_port *iport, u16 tag)
- {
- struct isci_host *ihost = iport->owning_controller;
- struct scu_task_context *task_context;
- task_context = &ihost->task_context_table[ISCI_TAG_TCI(tag)];
- memset(task_context, 0, sizeof(struct scu_task_context));
- task_context->initiator_request = 1;
- task_context->connection_rate = 1;
- task_context->logical_port_index = iport->physical_port_index;
- task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP;
- task_context->task_index = ISCI_TAG_TCI(tag);
- task_context->valid = SCU_TASK_CONTEXT_VALID;
- task_context->context_type = SCU_TASK_CONTEXT_TYPE;
- task_context->remote_node_index = iport->reserved_rni;
- task_context->do_not_dma_ssp_good_response = 1;
- task_context->task_phase = 0x01;
- }
- static void sci_port_destroy_dummy_resources(struct isci_port *iport)
- {
- struct isci_host *ihost = iport->owning_controller;
- if (iport->reserved_tag != SCI_CONTROLLER_INVALID_IO_TAG)
- isci_free_tag(ihost, iport->reserved_tag);
- if (iport->reserved_rni != SCU_DUMMY_INDEX)
- sci_remote_node_table_release_remote_node_index(&ihost->available_remote_nodes,
- 1, iport->reserved_rni);
- iport->reserved_rni = SCU_DUMMY_INDEX;
- iport->reserved_tag = SCI_CONTROLLER_INVALID_IO_TAG;
- }
- void sci_port_setup_transports(struct isci_port *iport, u32 device_id)
- {
- u8 index;
- for (index = 0; index < SCI_MAX_PHYS; index++) {
- if (iport->active_phy_mask & (1 << index))
- sci_phy_setup_transport(iport->phy_table[index], device_id);
- }
- }
- static void sci_port_resume_phy(struct isci_port *iport, struct isci_phy *iphy)
- {
- sci_phy_resume(iphy);
- iport->enabled_phy_mask |= 1 << iphy->phy_index;
- }
- static void sci_port_activate_phy(struct isci_port *iport,
- struct isci_phy *iphy,
- u8 flags)
- {
- struct isci_host *ihost = iport->owning_controller;
- if (iphy->protocol != SAS_PROTOCOL_SATA && (flags & PF_RESUME))
- sci_phy_resume(iphy);
- iport->active_phy_mask |= 1 << iphy->phy_index;
- sci_controller_clear_invalid_phy(ihost, iphy);
- if (flags & PF_NOTIFY)
- isci_port_link_up(ihost, iport, iphy);
- }
- void sci_port_deactivate_phy(struct isci_port *iport, struct isci_phy *iphy,
- bool do_notify_user)
- {
- struct isci_host *ihost = iport->owning_controller;
- iport->active_phy_mask &= ~(1 << iphy->phy_index);
- iport->enabled_phy_mask &= ~(1 << iphy->phy_index);
- if (!iport->active_phy_mask)
- iport->last_active_phy = iphy->phy_index;
- iphy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN;
- /* Re-assign the phy back to the LP as if it were a narrow port for APC
- * mode. For MPC mode, the phy will remain in the port.
- */
- if (iport->owning_controller->oem_parameters.controller.mode_type ==
- SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE)
- writel(iphy->phy_index,
- &iport->port_pe_configuration_register[iphy->phy_index]);
- if (do_notify_user == true)
- isci_port_link_down(ihost, iphy, iport);
- }
- static void sci_port_invalid_link_up(struct isci_port *iport, struct isci_phy *iphy)
- {
- struct isci_host *ihost = iport->owning_controller;
- /*
- * Check to see if we have alreay reported this link as bad and if
- * not go ahead and tell the SCI_USER that we have discovered an
- * invalid link.
- */
- if ((ihost->invalid_phy_mask & (1 << iphy->phy_index)) == 0) {
- ihost->invalid_phy_mask |= 1 << iphy->phy_index;
- dev_warn(&ihost->pdev->dev, "Invalid link up!\n");
- }
- }
- /**
- * sci_port_general_link_up_handler - phy can be assigned to port?
- * @iport: sci_port object for which has a phy that has gone link up.
- * @iphy: This is the struct isci_phy object that has gone link up.
- * @flags: PF_RESUME, PF_NOTIFY to sci_port_activate_phy
- *
- * Determine if this phy can be assigned to this port . If the phy is
- * not a valid PHY for this port then the function will notify the user.
- * A PHY can only be part of a port if it's attached SAS ADDRESS is the
- * same as all other PHYs in the same port.
- */
- static void sci_port_general_link_up_handler(struct isci_port *iport,
- struct isci_phy *iphy,
- u8 flags)
- {
- struct sci_sas_address port_sas_address;
- struct sci_sas_address phy_sas_address;
- sci_port_get_attached_sas_address(iport, &port_sas_address);
- sci_phy_get_attached_sas_address(iphy, &phy_sas_address);
- /* If the SAS address of the new phy matches the SAS address of
- * other phys in the port OR this is the first phy in the port,
- * then activate the phy and allow it to be used for operations
- * in this port.
- */
- if ((phy_sas_address.high == port_sas_address.high &&
- phy_sas_address.low == port_sas_address.low) ||
- iport->active_phy_mask == 0) {
- struct sci_base_state_machine *sm = &iport->sm;
- sci_port_activate_phy(iport, iphy, flags);
- if (sm->current_state_id == SCI_PORT_RESETTING)
- port_state_machine_change(iport, SCI_PORT_READY);
- } else
- sci_port_invalid_link_up(iport, iphy);
- }
- /**
- * sci_port_is_wide()
- * This method returns false if the port only has a single phy object assigned.
- * If there are no phys or more than one phy then the method will return
- * true.
- * @iport: The port for which the wide port condition is to be checked.
- *
- * bool true Is returned if this is a wide ported port. false Is returned if
- * this is a narrow port.
- */
- static bool sci_port_is_wide(struct isci_port *iport)
- {
- u32 index;
- u32 phy_count = 0;
- for (index = 0; index < SCI_MAX_PHYS; index++) {
- if (iport->phy_table[index] != NULL) {
- phy_count++;
- }
- }
- return phy_count != 1;
- }
- /**
- * sci_port_link_detected()
- * This method is called by the PHY object when the link is detected. if the
- * port wants the PHY to continue on to the link up state then the port
- * layer must return true. If the port object returns false the phy object
- * must halt its attempt to go link up.
- * @iport: The port associated with the phy object.
- * @iphy: The phy object that is trying to go link up.
- *
- * true if the phy object can continue to the link up condition. true Is
- * returned if this phy can continue to the ready state. false Is returned if
- * can not continue on to the ready state. This notification is in place for
- * wide ports and direct attached phys. Since there are no wide ported SATA
- * devices this could become an invalid port configuration.
- */
- bool sci_port_link_detected(struct isci_port *iport, struct isci_phy *iphy)
- {
- if ((iport->logical_port_index != SCIC_SDS_DUMMY_PORT) &&
- (iphy->protocol == SAS_PROTOCOL_SATA)) {
- if (sci_port_is_wide(iport)) {
- sci_port_invalid_link_up(iport, iphy);
- return false;
- } else {
- struct isci_host *ihost = iport->owning_controller;
- struct isci_port *dst_port = &(ihost->ports[iphy->phy_index]);
- writel(iphy->phy_index,
- &dst_port->port_pe_configuration_register[iphy->phy_index]);
- }
- }
- return true;
- }
- static void port_timeout(struct timer_list *t)
- {
- struct sci_timer *tmr = from_timer(tmr, t, timer);
- struct isci_port *iport = container_of(tmr, typeof(*iport), timer);
- struct isci_host *ihost = iport->owning_controller;
- unsigned long flags;
- u32 current_state;
- spin_lock_irqsave(&ihost->scic_lock, flags);
- if (tmr->cancel)
- goto done;
- current_state = iport->sm.current_state_id;
- if (current_state == SCI_PORT_RESETTING) {
- /* if the port is still in the resetting state then the timeout
- * fired before the reset completed.
- */
- port_state_machine_change(iport, SCI_PORT_FAILED);
- } else if (current_state == SCI_PORT_STOPPED) {
- /* if the port is stopped then the start request failed In this
- * case stay in the stopped state.
- */
- dev_err(sciport_to_dev(iport),
- "%s: SCIC Port 0x%p failed to stop before timeout.\n",
- __func__,
- iport);
- } else if (current_state == SCI_PORT_STOPPING) {
- dev_dbg(sciport_to_dev(iport),
- "%s: port%d: stop complete timeout\n",
- __func__, iport->physical_port_index);
- } else {
- /* The port is in the ready state and we have a timer
- * reporting a timeout this should not happen.
- */
- dev_err(sciport_to_dev(iport),
- "%s: SCIC Port 0x%p is processing a timeout operation "
- "in state %d.\n", __func__, iport, current_state);
- }
- done:
- spin_unlock_irqrestore(&ihost->scic_lock, flags);
- }
- /* --------------------------------------------------------------------------- */
- /*
- * This function updates the hardwares VIIT entry for this port.
- */
- static void sci_port_update_viit_entry(struct isci_port *iport)
- {
- struct sci_sas_address sas_address;
- sci_port_get_sas_address(iport, &sas_address);
- writel(sas_address.high,
- &iport->viit_registers->initiator_sas_address_hi);
- writel(sas_address.low,
- &iport->viit_registers->initiator_sas_address_lo);
- /* This value get cleared just in case its not already cleared */
- writel(0, &iport->viit_registers->reserved);
- /* We are required to update the status register last */
- writel(SCU_VIIT_ENTRY_ID_VIIT |
- SCU_VIIT_IPPT_INITIATOR |
- ((1 << iport->physical_port_index) << SCU_VIIT_ENTRY_LPVIE_SHIFT) |
- SCU_VIIT_STATUS_ALL_VALID,
- &iport->viit_registers->status);
- }
- enum sas_linkrate sci_port_get_max_allowed_speed(struct isci_port *iport)
- {
- u16 index;
- struct isci_phy *iphy;
- enum sas_linkrate max_allowed_speed = SAS_LINK_RATE_6_0_GBPS;
- /*
- * Loop through all of the phys in this port and find the phy with the
- * lowest maximum link rate. */
- for (index = 0; index < SCI_MAX_PHYS; index++) {
- iphy = iport->phy_table[index];
- if (iphy && sci_port_active_phy(iport, iphy) &&
- iphy->max_negotiated_speed < max_allowed_speed)
- max_allowed_speed = iphy->max_negotiated_speed;
- }
- return max_allowed_speed;
- }
- static void sci_port_suspend_port_task_scheduler(struct isci_port *iport)
- {
- u32 pts_control_value;
- pts_control_value = readl(&iport->port_task_scheduler_registers->control);
- pts_control_value |= SCU_PTSxCR_GEN_BIT(SUSPEND);
- writel(pts_control_value, &iport->port_task_scheduler_registers->control);
- }
- /**
- * sci_port_post_dummy_request() - post dummy/workaround request
- * @iport: port to post task
- *
- * Prevent the hardware scheduler from posting new requests to the front
- * of the scheduler queue causing a starvation problem for currently
- * ongoing requests.
- *
- */
- static void sci_port_post_dummy_request(struct isci_port *iport)
- {
- struct isci_host *ihost = iport->owning_controller;
- u16 tag = iport->reserved_tag;
- struct scu_task_context *tc;
- u32 command;
- tc = &ihost->task_context_table[ISCI_TAG_TCI(tag)];
- tc->abort = 0;
- command = SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
- iport->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT |
- ISCI_TAG_TCI(tag);
- sci_controller_post_request(ihost, command);
- }
- /**
- * sci_port_abort_dummy_request()
- * This routine will abort the dummy request. This will allow the hardware to
- * power down parts of the silicon to save power.
- *
- * @iport: The port on which the task must be aborted.
- *
- */
- static void sci_port_abort_dummy_request(struct isci_port *iport)
- {
- struct isci_host *ihost = iport->owning_controller;
- u16 tag = iport->reserved_tag;
- struct scu_task_context *tc;
- u32 command;
- tc = &ihost->task_context_table[ISCI_TAG_TCI(tag)];
- tc->abort = 1;
- command = SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT |
- iport->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT |
- ISCI_TAG_TCI(tag);
- sci_controller_post_request(ihost, command);
- }
- /**
- * sci_port_resume_port_task_scheduler()
- * @iport: This is the struct isci_port object to resume.
- *
- * This method will resume the port task scheduler for this port object. none
- */
- static void
- sci_port_resume_port_task_scheduler(struct isci_port *iport)
- {
- u32 pts_control_value;
- pts_control_value = readl(&iport->port_task_scheduler_registers->control);
- pts_control_value &= ~SCU_PTSxCR_GEN_BIT(SUSPEND);
- writel(pts_control_value, &iport->port_task_scheduler_registers->control);
- }
- static void sci_port_ready_substate_waiting_enter(struct sci_base_state_machine *sm)
- {
- struct isci_port *iport = container_of(sm, typeof(*iport), sm);
- sci_port_suspend_port_task_scheduler(iport);
- iport->not_ready_reason = SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS;
- if (iport->active_phy_mask != 0) {
- /* At least one of the phys on the port is ready */
- port_state_machine_change(iport,
- SCI_PORT_SUB_OPERATIONAL);
- }
- }
- static void scic_sds_port_ready_substate_waiting_exit(
- struct sci_base_state_machine *sm)
- {
- struct isci_port *iport = container_of(sm, typeof(*iport), sm);
- sci_port_resume_port_task_scheduler(iport);
- }
- static void sci_port_ready_substate_operational_enter(struct sci_base_state_machine *sm)
- {
- u32 index;
- struct isci_port *iport = container_of(sm, typeof(*iport), sm);
- struct isci_host *ihost = iport->owning_controller;
- dev_dbg(&ihost->pdev->dev, "%s: port%d ready\n",
- __func__, iport->physical_port_index);
- for (index = 0; index < SCI_MAX_PHYS; index++) {
- if (iport->phy_table[index]) {
- writel(iport->physical_port_index,
- &iport->port_pe_configuration_register[
- iport->phy_table[index]->phy_index]);
- if (((iport->active_phy_mask^iport->enabled_phy_mask) & (1 << index)) != 0)
- sci_port_resume_phy(iport, iport->phy_table[index]);
- }
- }
- sci_port_update_viit_entry(iport);
- /*
- * Post the dummy task for the port so the hardware can schedule
- * io correctly
- */
- sci_port_post_dummy_request(iport);
- }
- static void sci_port_invalidate_dummy_remote_node(struct isci_port *iport)
- {
- struct isci_host *ihost = iport->owning_controller;
- u8 phys_index = iport->physical_port_index;
- union scu_remote_node_context *rnc;
- u16 rni = iport->reserved_rni;
- u32 command;
- rnc = &ihost->remote_node_context_table[rni];
- rnc->ssp.is_valid = false;
- /* ensure the preceding tc abort request has reached the
- * controller and give it ample time to act before posting the rnc
- * invalidate
- */
- readl(&ihost->smu_registers->interrupt_status); /* flush */
- udelay(10);
- command = SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE |
- phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
- sci_controller_post_request(ihost, command);
- }
- /**
- * sci_port_ready_substate_operational_exit()
- * @sm: This is the object which is cast to a struct isci_port object.
- *
- * This method will perform the actions required by the struct isci_port on
- * exiting the SCI_PORT_SUB_OPERATIONAL. This function reports
- * the port not ready and suspends the port task scheduler. none
- */
- static void sci_port_ready_substate_operational_exit(struct sci_base_state_machine *sm)
- {
- struct isci_port *iport = container_of(sm, typeof(*iport), sm);
- struct isci_host *ihost = iport->owning_controller;
- /*
- * Kill the dummy task for this port if it has not yet posted
- * the hardware will treat this as a NOP and just return abort
- * complete.
- */
- sci_port_abort_dummy_request(iport);
- dev_dbg(&ihost->pdev->dev, "%s: port%d !ready\n",
- __func__, iport->physical_port_index);
- if (iport->ready_exit)
- sci_port_invalidate_dummy_remote_node(iport);
- }
- static void sci_port_ready_substate_configuring_enter(struct sci_base_state_machine *sm)
- {
- struct isci_port *iport = container_of(sm, typeof(*iport), sm);
- struct isci_host *ihost = iport->owning_controller;
- if (iport->active_phy_mask == 0) {
- dev_dbg(&ihost->pdev->dev, "%s: port%d !ready\n",
- __func__, iport->physical_port_index);
- port_state_machine_change(iport, SCI_PORT_SUB_WAITING);
- } else
- port_state_machine_change(iport, SCI_PORT_SUB_OPERATIONAL);
- }
- enum sci_status sci_port_start(struct isci_port *iport)
- {
- struct isci_host *ihost = iport->owning_controller;
- enum sci_status status = SCI_SUCCESS;
- enum sci_port_states state;
- u32 phy_mask;
- state = iport->sm.current_state_id;
- if (state != SCI_PORT_STOPPED) {
- dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n",
- __func__, port_state_name(state));
- return SCI_FAILURE_INVALID_STATE;
- }
- if (iport->assigned_device_count > 0) {
- /* TODO This is a start failure operation because
- * there are still devices assigned to this port.
- * There must be no devices assigned to a port on a
- * start operation.
- */
- return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
- }
- if (iport->reserved_rni == SCU_DUMMY_INDEX) {
- u16 rni = sci_remote_node_table_allocate_remote_node(
- &ihost->available_remote_nodes, 1);
- if (rni != SCU_DUMMY_INDEX)
- sci_port_construct_dummy_rnc(iport, rni);
- else
- status = SCI_FAILURE_INSUFFICIENT_RESOURCES;
- iport->reserved_rni = rni;
- }
- if (iport->reserved_tag == SCI_CONTROLLER_INVALID_IO_TAG) {
- u16 tag;
- tag = isci_alloc_tag(ihost);
- if (tag == SCI_CONTROLLER_INVALID_IO_TAG)
- status = SCI_FAILURE_INSUFFICIENT_RESOURCES;
- else
- sci_port_construct_dummy_task(iport, tag);
- iport->reserved_tag = tag;
- }
- if (status == SCI_SUCCESS) {
- phy_mask = sci_port_get_phys(iport);
- /*
- * There are one or more phys assigned to this port. Make sure
- * the port's phy mask is in fact legal and supported by the
- * silicon.
- */
- if (sci_port_is_phy_mask_valid(iport, phy_mask) == true) {
- port_state_machine_change(iport,
- SCI_PORT_READY);
- return SCI_SUCCESS;
- }
- status = SCI_FAILURE;
- }
- if (status != SCI_SUCCESS)
- sci_port_destroy_dummy_resources(iport);
- return status;
- }
- enum sci_status sci_port_stop(struct isci_port *iport)
- {
- enum sci_port_states state;
- state = iport->sm.current_state_id;
- switch (state) {
- case SCI_PORT_STOPPED:
- return SCI_SUCCESS;
- case SCI_PORT_SUB_WAITING:
- case SCI_PORT_SUB_OPERATIONAL:
- case SCI_PORT_SUB_CONFIGURING:
- case SCI_PORT_RESETTING:
- port_state_machine_change(iport,
- SCI_PORT_STOPPING);
- return SCI_SUCCESS;
- default:
- dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n",
- __func__, port_state_name(state));
- return SCI_FAILURE_INVALID_STATE;
- }
- }
- static enum sci_status sci_port_hard_reset(struct isci_port *iport, u32 timeout)
- {
- enum sci_status status = SCI_FAILURE_INVALID_PHY;
- struct isci_phy *iphy = NULL;
- enum sci_port_states state;
- u32 phy_index;
- state = iport->sm.current_state_id;
- if (state != SCI_PORT_SUB_OPERATIONAL) {
- dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n",
- __func__, port_state_name(state));
- return SCI_FAILURE_INVALID_STATE;
- }
- /* Select a phy on which we can send the hard reset request. */
- for (phy_index = 0; phy_index < SCI_MAX_PHYS && !iphy; phy_index++) {
- iphy = iport->phy_table[phy_index];
- if (iphy && !sci_port_active_phy(iport, iphy)) {
- /*
- * We found a phy but it is not ready select
- * different phy
- */
- iphy = NULL;
- }
- }
- /* If we have a phy then go ahead and start the reset procedure */
- if (!iphy)
- return status;
- status = sci_phy_reset(iphy);
- if (status != SCI_SUCCESS)
- return status;
- sci_mod_timer(&iport->timer, timeout);
- iport->not_ready_reason = SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED;
- port_state_machine_change(iport, SCI_PORT_RESETTING);
- return SCI_SUCCESS;
- }
- /**
- * sci_port_add_phy()
- * @iport: This parameter specifies the port in which the phy will be added.
- * @iphy: This parameter is the phy which is to be added to the port.
- *
- * This method will add a PHY to the selected port. This method returns an
- * enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other
- * status is a failure to add the phy to the port.
- */
- enum sci_status sci_port_add_phy(struct isci_port *iport,
- struct isci_phy *iphy)
- {
- enum sci_status status;
- enum sci_port_states state;
- sci_port_bcn_enable(iport);
- state = iport->sm.current_state_id;
- switch (state) {
- case SCI_PORT_STOPPED: {
- struct sci_sas_address port_sas_address;
- /* Read the port assigned SAS Address if there is one */
- sci_port_get_sas_address(iport, &port_sas_address);
- if (port_sas_address.high != 0 && port_sas_address.low != 0) {
- struct sci_sas_address phy_sas_address;
- /* Make sure that the PHY SAS Address matches the SAS Address
- * for this port
- */
- sci_phy_get_sas_address(iphy, &phy_sas_address);
- if (port_sas_address.high != phy_sas_address.high ||
- port_sas_address.low != phy_sas_address.low)
- return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
- }
- return sci_port_set_phy(iport, iphy);
- }
- case SCI_PORT_SUB_WAITING:
- case SCI_PORT_SUB_OPERATIONAL:
- status = sci_port_set_phy(iport, iphy);
- if (status != SCI_SUCCESS)
- return status;
- sci_port_general_link_up_handler(iport, iphy, PF_NOTIFY|PF_RESUME);
- iport->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
- port_state_machine_change(iport, SCI_PORT_SUB_CONFIGURING);
- return status;
- case SCI_PORT_SUB_CONFIGURING:
- status = sci_port_set_phy(iport, iphy);
- if (status != SCI_SUCCESS)
- return status;
- sci_port_general_link_up_handler(iport, iphy, PF_NOTIFY);
- /* Re-enter the configuring state since this may be the last phy in
- * the port.
- */
- port_state_machine_change(iport,
- SCI_PORT_SUB_CONFIGURING);
- return SCI_SUCCESS;
- default:
- dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n",
- __func__, port_state_name(state));
- return SCI_FAILURE_INVALID_STATE;
- }
- }
- /**
- * sci_port_remove_phy()
- * @iport: This parameter specifies the port in which the phy will be added.
- * @iphy: This parameter is the phy which is to be added to the port.
- *
- * This method will remove the PHY from the selected PORT. This method returns
- * an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any
- * other status is a failure to add the phy to the port.
- */
- enum sci_status sci_port_remove_phy(struct isci_port *iport,
- struct isci_phy *iphy)
- {
- enum sci_status status;
- enum sci_port_states state;
- state = iport->sm.current_state_id;
- switch (state) {
- case SCI_PORT_STOPPED:
- return sci_port_clear_phy(iport, iphy);
- case SCI_PORT_SUB_OPERATIONAL:
- status = sci_port_clear_phy(iport, iphy);
- if (status != SCI_SUCCESS)
- return status;
- sci_port_deactivate_phy(iport, iphy, true);
- iport->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
- port_state_machine_change(iport,
- SCI_PORT_SUB_CONFIGURING);
- return SCI_SUCCESS;
- case SCI_PORT_SUB_CONFIGURING:
- status = sci_port_clear_phy(iport, iphy);
- if (status != SCI_SUCCESS)
- return status;
- sci_port_deactivate_phy(iport, iphy, true);
- /* Re-enter the configuring state since this may be the last phy in
- * the port
- */
- port_state_machine_change(iport,
- SCI_PORT_SUB_CONFIGURING);
- return SCI_SUCCESS;
- default:
- dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n",
- __func__, port_state_name(state));
- return SCI_FAILURE_INVALID_STATE;
- }
- }
- enum sci_status sci_port_link_up(struct isci_port *iport,
- struct isci_phy *iphy)
- {
- enum sci_port_states state;
- state = iport->sm.current_state_id;
- switch (state) {
- case SCI_PORT_SUB_WAITING:
- /* Since this is the first phy going link up for the port we
- * can just enable it and continue
- */
- sci_port_activate_phy(iport, iphy, PF_NOTIFY|PF_RESUME);
- port_state_machine_change(iport,
- SCI_PORT_SUB_OPERATIONAL);
- return SCI_SUCCESS;
- case SCI_PORT_SUB_OPERATIONAL:
- sci_port_general_link_up_handler(iport, iphy, PF_NOTIFY|PF_RESUME);
- return SCI_SUCCESS;
- case SCI_PORT_RESETTING:
- /* TODO We should make sure that the phy that has gone
- * link up is the same one on which we sent the reset. It is
- * possible that the phy on which we sent the reset is not the
- * one that has gone link up and we want to make sure that
- * phy being reset comes back. Consider the case where a
- * reset is sent but before the hardware processes the reset it
- * get a link up on the port because of a hot plug event.
- * because of the reset request this phy will go link down
- * almost immediately.
- */
- /* In the resetting state we don't notify the user regarding
- * link up and link down notifications.
- */
- sci_port_general_link_up_handler(iport, iphy, PF_RESUME);
- return SCI_SUCCESS;
- default:
- dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n",
- __func__, port_state_name(state));
- return SCI_FAILURE_INVALID_STATE;
- }
- }
- enum sci_status sci_port_link_down(struct isci_port *iport,
- struct isci_phy *iphy)
- {
- enum sci_port_states state;
- state = iport->sm.current_state_id;
- switch (state) {
- case SCI_PORT_SUB_OPERATIONAL:
- sci_port_deactivate_phy(iport, iphy, true);
- /* If there are no active phys left in the port, then
- * transition the port to the WAITING state until such time
- * as a phy goes link up
- */
- if (iport->active_phy_mask == 0)
- port_state_machine_change(iport,
- SCI_PORT_SUB_WAITING);
- return SCI_SUCCESS;
- case SCI_PORT_RESETTING:
- /* In the resetting state we don't notify the user regarding
- * link up and link down notifications. */
- sci_port_deactivate_phy(iport, iphy, false);
- return SCI_SUCCESS;
- default:
- dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n",
- __func__, port_state_name(state));
- return SCI_FAILURE_INVALID_STATE;
- }
- }
- enum sci_status sci_port_start_io(struct isci_port *iport,
- struct isci_remote_device *idev,
- struct isci_request *ireq)
- {
- enum sci_port_states state;
- state = iport->sm.current_state_id;
- switch (state) {
- case SCI_PORT_SUB_WAITING:
- return SCI_FAILURE_INVALID_STATE;
- case SCI_PORT_SUB_OPERATIONAL:
- iport->started_request_count++;
- return SCI_SUCCESS;
- default:
- dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n",
- __func__, port_state_name(state));
- return SCI_FAILURE_INVALID_STATE;
- }
- }
- enum sci_status sci_port_complete_io(struct isci_port *iport,
- struct isci_remote_device *idev,
- struct isci_request *ireq)
- {
- enum sci_port_states state;
- state = iport->sm.current_state_id;
- switch (state) {
- case SCI_PORT_STOPPED:
- dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n",
- __func__, port_state_name(state));
- return SCI_FAILURE_INVALID_STATE;
- case SCI_PORT_STOPPING:
- sci_port_decrement_request_count(iport);
- if (iport->started_request_count == 0)
- port_state_machine_change(iport,
- SCI_PORT_STOPPED);
- break;
- case SCI_PORT_READY:
- case SCI_PORT_RESETTING:
- case SCI_PORT_FAILED:
- case SCI_PORT_SUB_WAITING:
- case SCI_PORT_SUB_OPERATIONAL:
- sci_port_decrement_request_count(iport);
- break;
- case SCI_PORT_SUB_CONFIGURING:
- sci_port_decrement_request_count(iport);
- if (iport->started_request_count == 0) {
- port_state_machine_change(iport,
- SCI_PORT_SUB_OPERATIONAL);
- }
- break;
- }
- return SCI_SUCCESS;
- }
- static void sci_port_enable_port_task_scheduler(struct isci_port *iport)
- {
- u32 pts_control_value;
- /* enable the port task scheduler in a suspended state */
- pts_control_value = readl(&iport->port_task_scheduler_registers->control);
- pts_control_value |= SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND);
- writel(pts_control_value, &iport->port_task_scheduler_registers->control);
- }
- static void sci_port_disable_port_task_scheduler(struct isci_port *iport)
- {
- u32 pts_control_value;
- pts_control_value = readl(&iport->port_task_scheduler_registers->control);
- pts_control_value &=
- ~(SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND));
- writel(pts_control_value, &iport->port_task_scheduler_registers->control);
- }
- static void sci_port_post_dummy_remote_node(struct isci_port *iport)
- {
- struct isci_host *ihost = iport->owning_controller;
- u8 phys_index = iport->physical_port_index;
- union scu_remote_node_context *rnc;
- u16 rni = iport->reserved_rni;
- u32 command;
- rnc = &ihost->remote_node_context_table[rni];
- rnc->ssp.is_valid = true;
- command = SCU_CONTEXT_COMMAND_POST_RNC_32 |
- phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
- sci_controller_post_request(ihost, command);
- /* ensure hardware has seen the post rnc command and give it
- * ample time to act before sending the suspend
- */
- readl(&ihost->smu_registers->interrupt_status); /* flush */
- udelay(10);
- command = SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX |
- phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
- sci_controller_post_request(ihost, command);
- }
- static void sci_port_stopped_state_enter(struct sci_base_state_machine *sm)
- {
- struct isci_port *iport = container_of(sm, typeof(*iport), sm);
- if (iport->sm.previous_state_id == SCI_PORT_STOPPING) {
- /*
- * If we enter this state becasuse of a request to stop
- * the port then we want to disable the hardwares port
- * task scheduler. */
- sci_port_disable_port_task_scheduler(iport);
- }
- }
- static void sci_port_stopped_state_exit(struct sci_base_state_machine *sm)
- {
- struct isci_port *iport = container_of(sm, typeof(*iport), sm);
- /* Enable and suspend the port task scheduler */
- sci_port_enable_port_task_scheduler(iport);
- }
- static void sci_port_ready_state_enter(struct sci_base_state_machine *sm)
- {
- struct isci_port *iport = container_of(sm, typeof(*iport), sm);
- struct isci_host *ihost = iport->owning_controller;
- u32 prev_state;
- prev_state = iport->sm.previous_state_id;
- if (prev_state == SCI_PORT_RESETTING)
- isci_port_hard_reset_complete(iport, SCI_SUCCESS);
- else
- dev_dbg(&ihost->pdev->dev, "%s: port%d !ready\n",
- __func__, iport->physical_port_index);
- /* Post and suspend the dummy remote node context for this port. */
- sci_port_post_dummy_remote_node(iport);
- /* Start the ready substate machine */
- port_state_machine_change(iport,
- SCI_PORT_SUB_WAITING);
- }
- static void sci_port_resetting_state_exit(struct sci_base_state_machine *sm)
- {
- struct isci_port *iport = container_of(sm, typeof(*iport), sm);
- sci_del_timer(&iport->timer);
- }
- static void sci_port_stopping_state_exit(struct sci_base_state_machine *sm)
- {
- struct isci_port *iport = container_of(sm, typeof(*iport), sm);
- sci_del_timer(&iport->timer);
- sci_port_destroy_dummy_resources(iport);
- }
- static void sci_port_failed_state_enter(struct sci_base_state_machine *sm)
- {
- struct isci_port *iport = container_of(sm, typeof(*iport), sm);
- isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT);
- }
- void sci_port_set_hang_detection_timeout(struct isci_port *iport, u32 timeout)
- {
- int phy_index;
- u32 phy_mask = iport->active_phy_mask;
- if (timeout)
- ++iport->hang_detect_users;
- else if (iport->hang_detect_users > 1)
- --iport->hang_detect_users;
- else
- iport->hang_detect_users = 0;
- if (timeout || (iport->hang_detect_users == 0)) {
- for (phy_index = 0; phy_index < SCI_MAX_PHYS; phy_index++) {
- if ((phy_mask >> phy_index) & 1) {
- writel(timeout,
- &iport->phy_table[phy_index]
- ->link_layer_registers
- ->link_layer_hang_detection_timeout);
- }
- }
- }
- }
- /* --------------------------------------------------------------------------- */
- static const struct sci_base_state sci_port_state_table[] = {
- [SCI_PORT_STOPPED] = {
- .enter_state = sci_port_stopped_state_enter,
- .exit_state = sci_port_stopped_state_exit
- },
- [SCI_PORT_STOPPING] = {
- .exit_state = sci_port_stopping_state_exit
- },
- [SCI_PORT_READY] = {
- .enter_state = sci_port_ready_state_enter,
- },
- [SCI_PORT_SUB_WAITING] = {
- .enter_state = sci_port_ready_substate_waiting_enter,
- .exit_state = scic_sds_port_ready_substate_waiting_exit,
- },
- [SCI_PORT_SUB_OPERATIONAL] = {
- .enter_state = sci_port_ready_substate_operational_enter,
- .exit_state = sci_port_ready_substate_operational_exit
- },
- [SCI_PORT_SUB_CONFIGURING] = {
- .enter_state = sci_port_ready_substate_configuring_enter
- },
- [SCI_PORT_RESETTING] = {
- .exit_state = sci_port_resetting_state_exit
- },
- [SCI_PORT_FAILED] = {
- .enter_state = sci_port_failed_state_enter,
- }
- };
- void sci_port_construct(struct isci_port *iport, u8 index,
- struct isci_host *ihost)
- {
- sci_init_sm(&iport->sm, sci_port_state_table, SCI_PORT_STOPPED);
- iport->logical_port_index = SCIC_SDS_DUMMY_PORT;
- iport->physical_port_index = index;
- iport->active_phy_mask = 0;
- iport->enabled_phy_mask = 0;
- iport->last_active_phy = 0;
- iport->ready_exit = false;
- iport->owning_controller = ihost;
- iport->started_request_count = 0;
- iport->assigned_device_count = 0;
- iport->hang_detect_users = 0;
- iport->reserved_rni = SCU_DUMMY_INDEX;
- iport->reserved_tag = SCI_CONTROLLER_INVALID_IO_TAG;
- sci_init_timer(&iport->timer, port_timeout);
- iport->port_task_scheduler_registers = NULL;
- for (index = 0; index < SCI_MAX_PHYS; index++)
- iport->phy_table[index] = NULL;
- }
- void sci_port_broadcast_change_received(struct isci_port *iport, struct isci_phy *iphy)
- {
- struct isci_host *ihost = iport->owning_controller;
- /* notify the user. */
- isci_port_bc_change_received(ihost, iport, iphy);
- }
- static void wait_port_reset(struct isci_host *ihost, struct isci_port *iport)
- {
- wait_event(ihost->eventq, !test_bit(IPORT_RESET_PENDING, &iport->state));
- }
- int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
- struct isci_phy *iphy)
- {
- unsigned long flags;
- enum sci_status status;
- int ret = TMF_RESP_FUNC_COMPLETE;
- dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n",
- __func__, iport);
- spin_lock_irqsave(&ihost->scic_lock, flags);
- set_bit(IPORT_RESET_PENDING, &iport->state);
- #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
- status = sci_port_hard_reset(iport, ISCI_PORT_RESET_TIMEOUT);
- spin_unlock_irqrestore(&ihost->scic_lock, flags);
- if (status == SCI_SUCCESS) {
- wait_port_reset(ihost, iport);
- dev_dbg(&ihost->pdev->dev,
- "%s: iport = %p; hard reset completion\n",
- __func__, iport);
- if (iport->hard_reset_status != SCI_SUCCESS) {
- ret = TMF_RESP_FUNC_FAILED;
- dev_err(&ihost->pdev->dev,
- "%s: iport = %p; hard reset failed (0x%x)\n",
- __func__, iport, iport->hard_reset_status);
- }
- } else {
- clear_bit(IPORT_RESET_PENDING, &iport->state);
- wake_up(&ihost->eventq);
- ret = TMF_RESP_FUNC_FAILED;
- dev_err(&ihost->pdev->dev,
- "%s: iport = %p; sci_port_hard_reset call"
- " failed 0x%x\n",
- __func__, iport, status);
- }
- return ret;
- }
- int isci_ata_check_ready(struct domain_device *dev)
- {
- struct isci_port *iport = dev->port->lldd_port;
- struct isci_host *ihost = dev_to_ihost(dev);
- struct isci_remote_device *idev;
- unsigned long flags;
- int rc = 0;
- spin_lock_irqsave(&ihost->scic_lock, flags);
- idev = isci_lookup_device(dev);
- spin_unlock_irqrestore(&ihost->scic_lock, flags);
- if (!idev)
- goto out;
- if (test_bit(IPORT_RESET_PENDING, &iport->state))
- goto out;
- rc = !!iport->active_phy_mask;
- out:
- isci_put_device(idev);
- return rc;
- }
- void isci_port_deformed(struct asd_sas_phy *phy)
- {
- struct isci_host *ihost = phy->ha->lldd_ha;
- struct isci_port *iport = phy->port->lldd_port;
- unsigned long flags;
- int i;
- /* we got a port notification on a port that was subsequently
- * torn down and libsas is just now catching up
- */
- if (!iport)
- return;
- spin_lock_irqsave(&ihost->scic_lock, flags);
- for (i = 0; i < SCI_MAX_PHYS; i++) {
- if (iport->active_phy_mask & 1 << i)
- break;
- }
- spin_unlock_irqrestore(&ihost->scic_lock, flags);
- if (i >= SCI_MAX_PHYS)
- dev_dbg(&ihost->pdev->dev, "%s: port: %ld\n",
- __func__, (long) (iport - &ihost->ports[0]));
- }
- void isci_port_formed(struct asd_sas_phy *phy)
- {
- struct isci_host *ihost = phy->ha->lldd_ha;
- struct isci_phy *iphy = to_iphy(phy);
- struct asd_sas_port *port = phy->port;
- struct isci_port *iport = NULL;
- unsigned long flags;
- int i;
- /* initial ports are formed as the driver is still initializing,
- * wait for that process to complete
- */
- wait_for_start(ihost);
- spin_lock_irqsave(&ihost->scic_lock, flags);
- for (i = 0; i < SCI_MAX_PORTS; i++) {
- iport = &ihost->ports[i];
- if (iport->active_phy_mask & 1 << iphy->phy_index)
- break;
- }
- spin_unlock_irqrestore(&ihost->scic_lock, flags);
- if (i >= SCI_MAX_PORTS)
- iport = NULL;
- port->lldd_port = iport;
- }
|