12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611171118111911201121112211231124112511261127112811291130113111321133113411351136113711381139114011411142114311441145114611471148114911501151115211531154115511561157115811591160116111621163116411651166116711681169117011711172117311741175117611771178117911801181118211831184118511861187118811891190119111921193119411951196119711981199120012011202120312041205120612071208120912101211121212131214121512161217121812191220122112221223122412251226122712281229123012311232123312341235123612371238123912401241124212431244124512461247124812491250125112521253125412551256125712581259126012611262126312641265126612671268126912701271127212731274127512761277127812791280128112821283128412851286128712881289129012911292129312941295129612971298129913001301130213031304130513061307130813091310131113121313131413151316131713181319132013211322132313241325132613271328132913301331133213331334133513361337133813391340134113421343134413451346134713481349135013511352135313541355135613571358135913601361136213631364136513661367136813691370137113721373137413751376137713781379138013811382138313841385138613871388138913901391139213931394139513961397139813991400140114021403140414051406140714081409141014111412141314141415141614171418141914201421142214231424142514261427142814291430143114321433143414351436143714381439144014411442144314441445144614471448144914501451145214531454145514561457145814591460146114621463146414651466146714681469147014711472147314741475147614771478147914801481148214831484148514861487148814891490149114921493149414951496149714981499150015011502150315041505150615071508150915101511151215131514151515161517151815191520152115221523152415251526152715281529153015311532153315341535153615371538153915401541154215431544154515461547154815491550155115521553155415551556155715581559156015611562156315641565156615671568156915701571157215731574157515761577157815791580158115821583158415851586158715881589159015911592159315941595159615971598159916001601160216031604160516061607160816091610161116121613161416151616161716181619162016211622162316241625162616271628162916301631163216331634163516361637163816391640164116421643164416451646164716481649165016511652165316541655165616571658165916601661166216631664166516661667166816691670167116721673167416751676167716781679168016811682168316841685168616871688168916901691169216931694169516961697169816991700170117021703170417051706170717081709171017111712171317141715171617171718171917201721172217231724172517261727172817291730173117321733173417351736173717381739174017411742174317441745174617471748174917501751175217531754175517561757175817591760176117621763176417651766176717681769177017711772177317741775177617771778177917801781178217831784178517861787178817891790179117921793179417951796179717981799180018011802180318041805180618071808180918101811181218131814181518161817181818191820182118221823182418251826182718281829183018311832183318341835183618371838183918401841184218431844184518461847184818491850185118521853185418551856185718581859186018611862186318641865186618671868186918701871187218731874187518761877187818791880188118821883188418851886188718881889189018911892189318941895189618971898189919001901190219031904190519061907190819091910191119121913191419151916191719181919192019211922192319241925192619271928192919301931193219331934193519361937193819391940194119421943194419451946194719481949195019511952195319541955195619571958195919601961196219631964196519661967196819691970197119721973197419751976197719781979198019811982198319841985198619871988198919901991199219931994199519961997199819992000200120022003200420052006200720082009201020112012201320142015201620172018201920202021202220232024202520262027202820292030203120322033203420352036203720382039204020412042204320442045204620472048204920502051205220532054205520562057205820592060206120622063206420652066206720682069207020712072207320742075207620772078207920802081208220832084208520862087208820892090209120922093209420952096209720982099210021012102210321042105210621072108210921102111211221132114211521162117211821192120212121222123212421252126212721282129213021312132213321342135213621372138213921402141214221432144214521462147214821492150215121522153215421552156215721582159216021612162216321642165216621672168216921702171217221732174217521762177217821792180218121822183218421852186218721882189219021912192219321942195219621972198219922002201220222032204220522062207220822092210221122122213221422152216221722182219222022212222222322242225222622272228222922302231223222332234223522362237223822392240224122422243224422452246224722482249225022512252225322542255225622572258225922602261226222632264226522662267226822692270227122722273227422752276227722782279228022812282228322842285228622872288228922902291229222932294229522962297229822992300230123022303230423052306230723082309231023112312231323142315231623172318231923202321232223232324232523262327232823292330233123322333233423352336233723382339234023412342234323442345234623472348234923502351235223532354235523562357235823592360236123622363236423652366236723682369237023712372237323742375237623772378237923802381238223832384238523862387238823892390239123922393239423952396239723982399240024012402240324042405240624072408240924102411241224132414241524162417241824192420242124222423242424252426242724282429243024312432243324342435243624372438243924402441244224432444244524462447244824492450245124522453245424552456245724582459246024612462246324642465246624672468246924702471247224732474247524762477247824792480248124822483248424852486248724882489249024912492249324942495249624972498249925002501250225032504250525062507250825092510251125122513251425152516251725182519252025212522252325242525252625272528252925302531253225332534253525362537253825392540254125422543254425452546254725482549255025512552255325542555255625572558255925602561256225632564256525662567256825692570257125722573257425752576257725782579258025812582258325842585258625872588258925902591259225932594259525962597259825992600260126022603260426052606260726082609261026112612261326142615261626172618261926202621262226232624262526262627262826292630263126322633263426352636263726382639264026412642264326442645264626472648264926502651265226532654265526562657265826592660266126622663266426652666266726682669267026712672267326742675267626772678267926802681268226832684268526862687268826892690269126922693269426952696269726982699270027012702270327042705270627072708270927102711271227132714271527162717271827192720272127222723272427252726272727282729273027312732273327342735273627372738273927402741274227432744274527462747274827492750275127522753275427552756275727582759276027612762276327642765276627672768276927702771277227732774277527762777277827792780278127822783278427852786278727882789279027912792279327942795279627972798279928002801280228032804280528062807280828092810281128122813281428152816281728182819282028212822282328242825282628272828282928302831283228332834283528362837283828392840284128422843284428452846284728482849285028512852285328542855285628572858285928602861286228632864286528662867286828692870287128722873287428752876287728782879288028812882288328842885288628872888288928902891289228932894289528962897289828992900290129022903290429052906290729082909291029112912291329142915291629172918291929202921292229232924292529262927292829292930293129322933293429352936293729382939294029412942294329442945294629472948294929502951295229532954295529562957295829592960296129622963296429652966296729682969297029712972297329742975297629772978297929802981298229832984298529862987298829892990299129922993299429952996299729982999300030013002300330043005300630073008300930103011301230133014301530163017301830193020302130223023302430253026302730283029303030313032303330343035303630373038303930403041304230433044304530463047304830493050305130523053305430553056305730583059306030613062306330643065306630673068306930703071307230733074307530763077307830793080308130823083308430853086308730883089309030913092309330943095309630973098309931003101310231033104 |
- /*
- * Block driver for media (i.e., flash cards)
- *
- * Copyright 2002 Hewlett-Packard Company
- * Copyright 2005-2008 Pierre Ossman
- *
- * Use consistent with the GNU GPL is permitted,
- * provided that this copyright notice is
- * preserved in its entirety in all copies and derived works.
- *
- * HEWLETT-PACKARD COMPANY MAKES NO WARRANTIES, EXPRESSED OR IMPLIED,
- * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS
- * FITNESS FOR ANY PARTICULAR PURPOSE.
- *
- * Many thanks to Alessandro Rubini and Jonathan Corbet!
- *
- * Author: Andrew Christian
- * 28 May 2002
- */
- #include <linux/moduleparam.h>
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/kernel.h>
- #include <linux/fs.h>
- #include <linux/slab.h>
- #include <linux/errno.h>
- #include <linux/hdreg.h>
- #include <linux/kdev_t.h>
- #include <linux/blkdev.h>
- #include <linux/cdev.h>
- #include <linux/mutex.h>
- #include <linux/scatterlist.h>
- #include <linux/string_helpers.h>
- #include <linux/delay.h>
- #include <linux/capability.h>
- #include <linux/compat.h>
- #include <linux/pm_runtime.h>
- #include <linux/idr.h>
- #include <linux/debugfs.h>
- #include <linux/mmc/ioctl.h>
- #include <linux/mmc/card.h>
- #include <linux/mmc/host.h>
- #include <linux/mmc/mmc.h>
- #include <linux/mmc/sd.h>
- #include <linux/uaccess.h>
- #include <trace/hooks/mmc_core.h>
- #include "queue.h"
- #include "block.h"
- #include "core.h"
- #include "card.h"
- #include "crypto.h"
- #include "host.h"
- #include "bus.h"
- #include "mmc_ops.h"
- #include "quirks.h"
- #include "sd_ops.h"
- MODULE_ALIAS("mmc:block");
- #ifdef MODULE_PARAM_PREFIX
- #undef MODULE_PARAM_PREFIX
- #endif
- #define MODULE_PARAM_PREFIX "mmcblk."
- /*
- * Set a 10 second timeout for polling write request busy state. Note, mmc core
- * is setting a 3 second timeout for SD cards, and SDHCI has long had a 10
- * second software timer to timeout the whole request, so 10 seconds should be
- * ample.
- */
- #define MMC_BLK_TIMEOUT_MS (10 * 1000)
- #define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
- #define MMC_EXTRACT_VALUE_FROM_ARG(x) ((x & 0x0000FF00) >> 8)
- #define mmc_req_rel_wr(req) ((req->cmd_flags & REQ_FUA) && \
- (rq_data_dir(req) == WRITE))
- static DEFINE_MUTEX(block_mutex);
- /*
- * The defaults come from config options but can be overriden by module
- * or bootarg options.
- */
- static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
- /*
- * We've only got one major, so number of mmcblk devices is
- * limited to (1 << 20) / number of minors per device. It is also
- * limited by the MAX_DEVICES below.
- */
- static int max_devices;
- #define MAX_DEVICES 256
- static DEFINE_IDA(mmc_blk_ida);
- static DEFINE_IDA(mmc_rpmb_ida);
- /*
- * There is one mmc_blk_data per slot.
- */
- struct mmc_blk_data {
- struct device *parent;
- struct gendisk *disk;
- struct mmc_queue queue;
- struct list_head part;
- struct list_head rpmbs;
- unsigned int flags;
- #define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */
- #define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */
- unsigned int usage;
- unsigned int read_only;
- unsigned int part_type;
- unsigned int reset_done;
- #define MMC_BLK_READ BIT(0)
- #define MMC_BLK_WRITE BIT(1)
- #define MMC_BLK_DISCARD BIT(2)
- #define MMC_BLK_SECDISCARD BIT(3)
- #define MMC_BLK_CQE_RECOVERY BIT(4)
- /*
- * Only set in main mmc_blk_data associated
- * with mmc_card with dev_set_drvdata, and keeps
- * track of the current selected device partition.
- */
- unsigned int part_curr;
- struct device_attribute force_ro;
- struct device_attribute power_ro_lock;
- int area_type;
- /* debugfs files (only in main mmc_blk_data) */
- struct dentry *status_dentry;
- struct dentry *ext_csd_dentry;
- };
- /* Device type for RPMB character devices */
- static dev_t mmc_rpmb_devt;
- /* Bus type for RPMB character devices */
- static struct bus_type mmc_rpmb_bus_type = {
- .name = "mmc_rpmb",
- };
- /**
- * struct mmc_rpmb_data - special RPMB device type for these areas
- * @dev: the device for the RPMB area
- * @chrdev: character device for the RPMB area
- * @id: unique device ID number
- * @part_index: partition index (0 on first)
- * @md: parent MMC block device
- * @node: list item, so we can put this device on a list
- */
- struct mmc_rpmb_data {
- struct device dev;
- struct cdev chrdev;
- int id;
- unsigned int part_index;
- struct mmc_blk_data *md;
- struct list_head node;
- };
- static DEFINE_MUTEX(open_lock);
- module_param(perdev_minors, int, 0444);
- MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
- static inline int mmc_blk_part_switch(struct mmc_card *card,
- unsigned int part_type);
- static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
- struct mmc_card *card,
- int disable_multi,
- struct mmc_queue *mq);
- static void mmc_blk_hsq_req_done(struct mmc_request *mrq);
- static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
- {
- struct mmc_blk_data *md;
- mutex_lock(&open_lock);
- md = disk->private_data;
- if (md && md->usage == 0)
- md = NULL;
- if (md)
- md->usage++;
- mutex_unlock(&open_lock);
- return md;
- }
- static inline int mmc_get_devidx(struct gendisk *disk)
- {
- int devidx = disk->first_minor / perdev_minors;
- return devidx;
- }
- static void mmc_blk_put(struct mmc_blk_data *md)
- {
- mutex_lock(&open_lock);
- md->usage--;
- if (md->usage == 0) {
- int devidx = mmc_get_devidx(md->disk);
- blk_put_queue(md->queue.queue);
- ida_simple_remove(&mmc_blk_ida, devidx);
- put_disk(md->disk);
- kfree(md);
- }
- mutex_unlock(&open_lock);
- }
- static ssize_t power_ro_lock_show(struct device *dev,
- struct device_attribute *attr, char *buf)
- {
- int ret;
- struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
- struct mmc_card *card = md->queue.card;
- int locked = 0;
- if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
- locked = 2;
- else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
- locked = 1;
- ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
- mmc_blk_put(md);
- return ret;
- }
- static ssize_t power_ro_lock_store(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t count)
- {
- int ret;
- struct mmc_blk_data *md, *part_md;
- struct mmc_queue *mq;
- struct request *req;
- unsigned long set;
- if (kstrtoul(buf, 0, &set))
- return -EINVAL;
- if (set != 1)
- return count;
- md = mmc_blk_get(dev_to_disk(dev));
- mq = &md->queue;
- /* Dispatch locking to the block layer */
- req = blk_get_request(mq->queue, REQ_OP_DRV_OUT, 0);
- if (IS_ERR(req)) {
- count = PTR_ERR(req);
- goto out_put;
- }
- req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_BOOT_WP;
- blk_execute_rq(mq->queue, NULL, req, 0);
- ret = req_to_mmc_queue_req(req)->drv_op_result;
- blk_put_request(req);
- if (!ret) {
- pr_info("%s: Locking boot partition ro until next power on\n",
- md->disk->disk_name);
- set_disk_ro(md->disk, 1);
- list_for_each_entry(part_md, &md->part, part)
- if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
- pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
- set_disk_ro(part_md->disk, 1);
- }
- }
- out_put:
- mmc_blk_put(md);
- return count;
- }
- static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
- char *buf)
- {
- int ret;
- struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
- ret = snprintf(buf, PAGE_SIZE, "%d\n",
- get_disk_ro(dev_to_disk(dev)) ^
- md->read_only);
- mmc_blk_put(md);
- return ret;
- }
- static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
- {
- int ret;
- char *end;
- struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
- unsigned long set = simple_strtoul(buf, &end, 0);
- if (end == buf) {
- ret = -EINVAL;
- goto out;
- }
- set_disk_ro(dev_to_disk(dev), set || md->read_only);
- ret = count;
- out:
- mmc_blk_put(md);
- return ret;
- }
- static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
- {
- struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
- int ret = -ENXIO;
- mutex_lock(&block_mutex);
- if (md) {
- ret = 0;
- if ((mode & FMODE_WRITE) && md->read_only) {
- mmc_blk_put(md);
- ret = -EROFS;
- }
- }
- mutex_unlock(&block_mutex);
- return ret;
- }
- static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
- {
- struct mmc_blk_data *md = disk->private_data;
- mutex_lock(&block_mutex);
- mmc_blk_put(md);
- mutex_unlock(&block_mutex);
- }
- static int
- mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
- {
- geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
- geo->heads = 4;
- geo->sectors = 16;
- return 0;
- }
- struct mmc_blk_ioc_data {
- struct mmc_ioc_cmd ic;
- unsigned char *buf;
- u64 buf_bytes;
- struct mmc_rpmb_data *rpmb;
- };
- static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
- struct mmc_ioc_cmd __user *user)
- {
- struct mmc_blk_ioc_data *idata;
- int err;
- idata = kmalloc(sizeof(*idata), GFP_KERNEL);
- if (!idata) {
- err = -ENOMEM;
- goto out;
- }
- if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
- err = -EFAULT;
- goto idata_err;
- }
- idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
- if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
- err = -EOVERFLOW;
- goto idata_err;
- }
- if (!idata->buf_bytes) {
- idata->buf = NULL;
- return idata;
- }
- idata->buf = memdup_user((void __user *)(unsigned long)
- idata->ic.data_ptr, idata->buf_bytes);
- if (IS_ERR(idata->buf)) {
- err = PTR_ERR(idata->buf);
- goto idata_err;
- }
- return idata;
- idata_err:
- kfree(idata);
- out:
- return ERR_PTR(err);
- }
- static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
- struct mmc_blk_ioc_data *idata)
- {
- struct mmc_ioc_cmd *ic = &idata->ic;
- if (copy_to_user(&(ic_ptr->response), ic->response,
- sizeof(ic->response)))
- return -EFAULT;
- if (!idata->ic.write_flag) {
- if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
- idata->buf, idata->buf_bytes))
- return -EFAULT;
- }
- return 0;
- }
- static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
- u32 *resp_errs)
- {
- unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
- int err = 0;
- u32 status;
- do {
- bool done = time_after(jiffies, timeout);
- err = __mmc_send_status(card, &status, 5);
- if (err) {
- dev_err(mmc_dev(card->host),
- "error %d requesting status\n", err);
- return err;
- }
- /* Accumulate any response error bits seen */
- if (resp_errs)
- *resp_errs |= status;
- /*
- * Timeout if the device never becomes ready for data and never
- * leaves the program state.
- */
- if (done) {
- dev_err(mmc_dev(card->host),
- "Card stuck in wrong state! %s status: %#x\n",
- __func__, status);
- return -ETIMEDOUT;
- }
- } while (!mmc_ready_for_data(status));
- return err;
- }
- static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
- struct mmc_blk_ioc_data *idata)
- {
- struct mmc_command cmd = {}, sbc = {};
- struct mmc_data data = {};
- struct mmc_request mrq = {};
- struct scatterlist sg;
- int err;
- unsigned int target_part;
- if (!card || !md || !idata)
- return -EINVAL;
- /*
- * The RPMB accesses comes in from the character device, so we
- * need to target these explicitly. Else we just target the
- * partition type for the block device the ioctl() was issued
- * on.
- */
- if (idata->rpmb) {
- /* Support multiple RPMB partitions */
- target_part = idata->rpmb->part_index;
- target_part |= EXT_CSD_PART_CONFIG_ACC_RPMB;
- } else {
- target_part = md->part_type;
- }
- cmd.opcode = idata->ic.opcode;
- cmd.arg = idata->ic.arg;
- cmd.flags = idata->ic.flags;
- if (idata->buf_bytes) {
- data.sg = &sg;
- data.sg_len = 1;
- data.blksz = idata->ic.blksz;
- data.blocks = idata->ic.blocks;
- sg_init_one(data.sg, idata->buf, idata->buf_bytes);
- if (idata->ic.write_flag)
- data.flags = MMC_DATA_WRITE;
- else
- data.flags = MMC_DATA_READ;
- /* data.flags must already be set before doing this. */
- mmc_set_data_timeout(&data, card);
- /* Allow overriding the timeout_ns for empirical tuning. */
- if (idata->ic.data_timeout_ns)
- data.timeout_ns = idata->ic.data_timeout_ns;
- if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
- /*
- * Pretend this is a data transfer and rely on the
- * host driver to compute timeout. When all host
- * drivers support cmd.cmd_timeout for R1B, this
- * can be changed to:
- *
- * mrq.data = NULL;
- * cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
- */
- data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
- }
- mrq.data = &data;
- }
- mrq.cmd = &cmd;
- err = mmc_blk_part_switch(card, target_part);
- if (err)
- return err;
- if (idata->ic.is_acmd) {
- err = mmc_app_cmd(card->host, card);
- if (err)
- return err;
- }
- if (idata->rpmb) {
- sbc.opcode = MMC_SET_BLOCK_COUNT;
- /*
- * We don't do any blockcount validation because the max size
- * may be increased by a future standard. We just copy the
- * 'Reliable Write' bit here.
- */
- sbc.arg = data.blocks | (idata->ic.write_flag & BIT(31));
- sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
- mrq.sbc = &sbc;
- }
- if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
- (cmd.opcode == MMC_SWITCH))
- return mmc_sanitize(card);
- mmc_wait_for_req(card->host, &mrq);
- memcpy(&idata->ic.response, cmd.resp, sizeof(cmd.resp));
- if (cmd.error) {
- dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
- __func__, cmd.error);
- return cmd.error;
- }
- if (data.error) {
- dev_err(mmc_dev(card->host), "%s: data error %d\n",
- __func__, data.error);
- return data.error;
- }
- /*
- * Make sure the cache of the PARTITION_CONFIG register and
- * PARTITION_ACCESS bits is updated in case the ioctl ext_csd write
- * changed it successfully.
- */
- if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_PART_CONFIG) &&
- (cmd.opcode == MMC_SWITCH)) {
- struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
- u8 value = MMC_EXTRACT_VALUE_FROM_ARG(cmd.arg);
- /*
- * Update cache so the next mmc_blk_part_switch call operates
- * on up-to-date data.
- */
- card->ext_csd.part_config = value;
- main_md->part_curr = value & EXT_CSD_PART_CONFIG_ACC_MASK;
- }
- /*
- * Make sure to update CACHE_CTRL in case it was changed. The cache
- * will get turned back on if the card is re-initialized, e.g.
- * suspend/resume or hw reset in recovery.
- */
- if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_CACHE_CTRL) &&
- (cmd.opcode == MMC_SWITCH)) {
- u8 value = MMC_EXTRACT_VALUE_FROM_ARG(cmd.arg) & 1;
- card->ext_csd.cache_ctrl = value;
- }
- /*
- * According to the SD specs, some commands require a delay after
- * issuing the command.
- */
- if (idata->ic.postsleep_min_us)
- usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
- if (idata->rpmb || (cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
- /*
- * Ensure RPMB/R1B command has completed by polling CMD13
- * "Send Status".
- */
- err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, NULL);
- }
- return err;
- }
- static int mmc_blk_ioctl_cmd(struct mmc_blk_data *md,
- struct mmc_ioc_cmd __user *ic_ptr,
- struct mmc_rpmb_data *rpmb)
- {
- struct mmc_blk_ioc_data *idata;
- struct mmc_blk_ioc_data *idatas[1];
- struct mmc_queue *mq;
- struct mmc_card *card;
- int err = 0, ioc_err = 0;
- struct request *req;
- idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
- if (IS_ERR(idata))
- return PTR_ERR(idata);
- /* This will be NULL on non-RPMB ioctl():s */
- idata->rpmb = rpmb;
- card = md->queue.card;
- if (IS_ERR(card)) {
- err = PTR_ERR(card);
- goto cmd_done;
- }
- /*
- * Dispatch the ioctl() into the block request queue.
- */
- mq = &md->queue;
- req = blk_get_request(mq->queue,
- idata->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
- if (IS_ERR(req)) {
- err = PTR_ERR(req);
- goto cmd_done;
- }
- idatas[0] = idata;
- req_to_mmc_queue_req(req)->drv_op =
- rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL;
- req_to_mmc_queue_req(req)->drv_op_data = idatas;
- req_to_mmc_queue_req(req)->ioc_count = 1;
- blk_execute_rq(mq->queue, NULL, req, 0);
- ioc_err = req_to_mmc_queue_req(req)->drv_op_result;
- err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
- blk_put_request(req);
- cmd_done:
- kfree(idata->buf);
- kfree(idata);
- return ioc_err ? ioc_err : err;
- }
- static int mmc_blk_ioctl_multi_cmd(struct mmc_blk_data *md,
- struct mmc_ioc_multi_cmd __user *user,
- struct mmc_rpmb_data *rpmb)
- {
- struct mmc_blk_ioc_data **idata = NULL;
- struct mmc_ioc_cmd __user *cmds = user->cmds;
- struct mmc_card *card;
- struct mmc_queue *mq;
- int i, err = 0, ioc_err = 0;
- __u64 num_of_cmds;
- struct request *req;
- if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
- sizeof(num_of_cmds)))
- return -EFAULT;
- if (!num_of_cmds)
- return 0;
- if (num_of_cmds > MMC_IOC_MAX_CMDS)
- return -EINVAL;
- idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL);
- if (!idata)
- return -ENOMEM;
- for (i = 0; i < num_of_cmds; i++) {
- idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]);
- if (IS_ERR(idata[i])) {
- err = PTR_ERR(idata[i]);
- num_of_cmds = i;
- goto cmd_err;
- }
- /* This will be NULL on non-RPMB ioctl():s */
- idata[i]->rpmb = rpmb;
- }
- card = md->queue.card;
- if (IS_ERR(card)) {
- err = PTR_ERR(card);
- goto cmd_err;
- }
- /*
- * Dispatch the ioctl()s into the block request queue.
- */
- mq = &md->queue;
- req = blk_get_request(mq->queue,
- idata[0]->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
- if (IS_ERR(req)) {
- err = PTR_ERR(req);
- goto cmd_err;
- }
- req_to_mmc_queue_req(req)->drv_op =
- rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL;
- req_to_mmc_queue_req(req)->drv_op_data = idata;
- req_to_mmc_queue_req(req)->ioc_count = num_of_cmds;
- blk_execute_rq(mq->queue, NULL, req, 0);
- ioc_err = req_to_mmc_queue_req(req)->drv_op_result;
- /* copy to user if data and response */
- for (i = 0; i < num_of_cmds && !err; i++)
- err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);
- blk_put_request(req);
- cmd_err:
- for (i = 0; i < num_of_cmds; i++) {
- kfree(idata[i]->buf);
- kfree(idata[i]);
- }
- kfree(idata);
- return ioc_err ? ioc_err : err;
- }
- static int mmc_blk_check_blkdev(struct block_device *bdev)
- {
- /*
- * The caller must have CAP_SYS_RAWIO, and must be calling this on the
- * whole block device, not on a partition. This prevents overspray
- * between sibling partitions.
- */
- if (!capable(CAP_SYS_RAWIO) || bdev_is_partition(bdev))
- return -EPERM;
- return 0;
- }
- static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
- unsigned int cmd, unsigned long arg)
- {
- struct mmc_blk_data *md;
- int ret;
- switch (cmd) {
- case MMC_IOC_CMD:
- ret = mmc_blk_check_blkdev(bdev);
- if (ret)
- return ret;
- md = mmc_blk_get(bdev->bd_disk);
- if (!md)
- return -EINVAL;
- ret = mmc_blk_ioctl_cmd(md,
- (struct mmc_ioc_cmd __user *)arg,
- NULL);
- mmc_blk_put(md);
- return ret;
- case MMC_IOC_MULTI_CMD:
- ret = mmc_blk_check_blkdev(bdev);
- if (ret)
- return ret;
- md = mmc_blk_get(bdev->bd_disk);
- if (!md)
- return -EINVAL;
- ret = mmc_blk_ioctl_multi_cmd(md,
- (struct mmc_ioc_multi_cmd __user *)arg,
- NULL);
- mmc_blk_put(md);
- return ret;
- default:
- return -EINVAL;
- }
- }
- #ifdef CONFIG_COMPAT
- static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
- unsigned int cmd, unsigned long arg)
- {
- return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
- }
- #endif
- static const struct block_device_operations mmc_bdops = {
- .open = mmc_blk_open,
- .release = mmc_blk_release,
- .getgeo = mmc_blk_getgeo,
- .owner = THIS_MODULE,
- .ioctl = mmc_blk_ioctl,
- #ifdef CONFIG_COMPAT
- .compat_ioctl = mmc_blk_compat_ioctl,
- #endif
- };
- static int mmc_blk_part_switch_pre(struct mmc_card *card,
- unsigned int part_type)
- {
- int ret = 0;
- if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) {
- if (card->ext_csd.cmdq_en) {
- ret = mmc_cmdq_disable(card);
- if (ret)
- return ret;
- }
- mmc_retune_pause(card->host);
- }
- return ret;
- }
- static int mmc_blk_part_switch_post(struct mmc_card *card,
- unsigned int part_type)
- {
- int ret = 0;
- if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) {
- mmc_retune_unpause(card->host);
- if (card->reenable_cmdq && !card->ext_csd.cmdq_en)
- ret = mmc_cmdq_enable(card);
- }
- return ret;
- }
- static inline int mmc_blk_part_switch(struct mmc_card *card,
- unsigned int part_type)
- {
- int ret = 0;
- struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
- if (main_md->part_curr == part_type)
- return 0;
- if (mmc_card_mmc(card)) {
- u8 part_config = card->ext_csd.part_config;
- ret = mmc_blk_part_switch_pre(card, part_type);
- if (ret)
- return ret;
- part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
- part_config |= part_type;
- ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
- EXT_CSD_PART_CONFIG, part_config,
- card->ext_csd.part_time);
- if (ret) {
- mmc_blk_part_switch_post(card, part_type);
- return ret;
- }
- card->ext_csd.part_config = part_config;
- ret = mmc_blk_part_switch_post(card, main_md->part_curr);
- }
- main_md->part_curr = part_type;
- return ret;
- }
- static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks)
- {
- int err;
- u32 result;
- __be32 *blocks;
- struct mmc_request mrq = {};
- struct mmc_command cmd = {};
- struct mmc_data data = {};
- struct scatterlist sg;
- cmd.opcode = MMC_APP_CMD;
- cmd.arg = card->rca << 16;
- cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
- err = mmc_wait_for_cmd(card->host, &cmd, 0);
- if (err)
- return err;
- if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
- return -EIO;
- memset(&cmd, 0, sizeof(struct mmc_command));
- cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
- cmd.arg = 0;
- cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
- data.blksz = 4;
- data.blocks = 1;
- data.flags = MMC_DATA_READ;
- data.sg = &sg;
- data.sg_len = 1;
- mmc_set_data_timeout(&data, card);
- mrq.cmd = &cmd;
- mrq.data = &data;
- blocks = kmalloc(4, GFP_KERNEL);
- if (!blocks)
- return -ENOMEM;
- sg_init_one(&sg, blocks, 4);
- mmc_wait_for_req(card->host, &mrq);
- result = ntohl(*blocks);
- kfree(blocks);
- if (cmd.error || data.error)
- return -EIO;
- *written_blocks = result;
- return 0;
- }
- static unsigned int mmc_blk_clock_khz(struct mmc_host *host)
- {
- if (host->actual_clock)
- return host->actual_clock / 1000;
- /* Clock may be subject to a divisor, fudge it by a factor of 2. */
- if (host->ios.clock)
- return host->ios.clock / 2000;
- /* How can there be no clock */
- WARN_ON_ONCE(1);
- return 100; /* 100 kHz is minimum possible value */
- }
- static unsigned int mmc_blk_data_timeout_ms(struct mmc_host *host,
- struct mmc_data *data)
- {
- unsigned int ms = DIV_ROUND_UP(data->timeout_ns, 1000000);
- unsigned int khz;
- if (data->timeout_clks) {
- khz = mmc_blk_clock_khz(host);
- ms += DIV_ROUND_UP(data->timeout_clks, khz);
- }
- return ms;
- }
- static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
- int type)
- {
- int err;
- if (md->reset_done & type)
- return -EEXIST;
- md->reset_done |= type;
- err = mmc_hw_reset(host);
- /* Ensure we switch back to the correct partition */
- if (err != -EOPNOTSUPP) {
- struct mmc_blk_data *main_md =
- dev_get_drvdata(&host->card->dev);
- int part_err;
- bool allow = true;
- trace_android_vh_mmc_blk_reset(host, err, &allow);
- if (!allow)
- return -ENODEV;
- main_md->part_curr = main_md->part_type;
- part_err = mmc_blk_part_switch(host->card, md->part_type);
- if (part_err) {
- /*
- * We have failed to get back into the correct
- * partition, so we need to abort the whole request.
- */
- return -ENODEV;
- }
- }
- return err;
- }
- static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
- {
- md->reset_done &= ~type;
- }
- /*
- * The non-block commands come back from the block layer after it queued it and
- * processed it with all other requests and then they get issued in this
- * function.
- */
- static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req)
- {
- struct mmc_queue_req *mq_rq;
- struct mmc_card *card = mq->card;
- struct mmc_blk_data *md = mq->blkdata;
- struct mmc_blk_ioc_data **idata;
- bool rpmb_ioctl;
- u8 **ext_csd;
- u32 status;
- int ret;
- int i;
- mq_rq = req_to_mmc_queue_req(req);
- rpmb_ioctl = (mq_rq->drv_op == MMC_DRV_OP_IOCTL_RPMB);
- switch (mq_rq->drv_op) {
- case MMC_DRV_OP_IOCTL:
- if (card->ext_csd.cmdq_en) {
- ret = mmc_cmdq_disable(card);
- if (ret)
- break;
- }
- fallthrough;
- case MMC_DRV_OP_IOCTL_RPMB:
- idata = mq_rq->drv_op_data;
- for (i = 0, ret = 0; i < mq_rq->ioc_count; i++) {
- ret = __mmc_blk_ioctl_cmd(card, md, idata[i]);
- if (ret)
- break;
- }
- /* Always switch back to main area after RPMB access */
- if (rpmb_ioctl)
- mmc_blk_part_switch(card, 0);
- else if (card->reenable_cmdq && !card->ext_csd.cmdq_en)
- mmc_cmdq_enable(card);
- break;
- case MMC_DRV_OP_BOOT_WP:
- ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
- card->ext_csd.boot_ro_lock |
- EXT_CSD_BOOT_WP_B_PWR_WP_EN,
- card->ext_csd.part_time);
- if (ret)
- pr_err("%s: Locking boot partition ro until next power on failed: %d\n",
- md->disk->disk_name, ret);
- else
- card->ext_csd.boot_ro_lock |=
- EXT_CSD_BOOT_WP_B_PWR_WP_EN;
- break;
- case MMC_DRV_OP_GET_CARD_STATUS:
- ret = mmc_send_status(card, &status);
- if (!ret)
- ret = status;
- break;
- case MMC_DRV_OP_GET_EXT_CSD:
- ext_csd = mq_rq->drv_op_data;
- ret = mmc_get_ext_csd(card, ext_csd);
- break;
- default:
- pr_err("%s: unknown driver specific operation\n",
- md->disk->disk_name);
- ret = -EINVAL;
- break;
- }
- mq_rq->drv_op_result = ret;
- blk_mq_end_request(req, ret ? BLK_STS_IOERR : BLK_STS_OK);
- }
- static void mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
- {
- struct mmc_blk_data *md = mq->blkdata;
- struct mmc_card *card = md->queue.card;
- unsigned int from, nr;
- int err = 0, type = MMC_BLK_DISCARD;
- blk_status_t status = BLK_STS_OK;
- if (!mmc_can_erase(card)) {
- status = BLK_STS_NOTSUPP;
- goto fail;
- }
- from = blk_rq_pos(req);
- nr = blk_rq_sectors(req);
- do {
- err = 0;
- if (card->quirks & MMC_QUIRK_INAND_CMD38) {
- err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
- INAND_CMD38_ARG_EXT_CSD,
- card->erase_arg == MMC_TRIM_ARG ?
- INAND_CMD38_ARG_TRIM :
- INAND_CMD38_ARG_ERASE,
- card->ext_csd.generic_cmd6_time);
- }
- if (!err)
- err = mmc_erase(card, from, nr, card->erase_arg);
- } while (err == -EIO && !mmc_blk_reset(md, card->host, type));
- if (err)
- status = BLK_STS_IOERR;
- else
- mmc_blk_reset_success(md, type);
- fail:
- blk_mq_end_request(req, status);
- }
- static void mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
- struct request *req)
- {
- struct mmc_blk_data *md = mq->blkdata;
- struct mmc_card *card = md->queue.card;
- unsigned int from, nr, arg;
- int err = 0, type = MMC_BLK_SECDISCARD;
- blk_status_t status = BLK_STS_OK;
- if (!(mmc_can_secure_erase_trim(card))) {
- status = BLK_STS_NOTSUPP;
- goto out;
- }
- from = blk_rq_pos(req);
- nr = blk_rq_sectors(req);
- if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
- arg = MMC_SECURE_TRIM1_ARG;
- else
- arg = MMC_SECURE_ERASE_ARG;
- retry:
- if (card->quirks & MMC_QUIRK_INAND_CMD38) {
- err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
- INAND_CMD38_ARG_EXT_CSD,
- arg == MMC_SECURE_TRIM1_ARG ?
- INAND_CMD38_ARG_SECTRIM1 :
- INAND_CMD38_ARG_SECERASE,
- card->ext_csd.generic_cmd6_time);
- if (err)
- goto out_retry;
- }
- err = mmc_erase(card, from, nr, arg);
- if (err == -EIO)
- goto out_retry;
- if (err) {
- status = BLK_STS_IOERR;
- goto out;
- }
- if (arg == MMC_SECURE_TRIM1_ARG) {
- if (card->quirks & MMC_QUIRK_INAND_CMD38) {
- err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
- INAND_CMD38_ARG_EXT_CSD,
- INAND_CMD38_ARG_SECTRIM2,
- card->ext_csd.generic_cmd6_time);
- if (err)
- goto out_retry;
- }
- err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
- if (err == -EIO)
- goto out_retry;
- if (err) {
- status = BLK_STS_IOERR;
- goto out;
- }
- }
- out_retry:
- if (err && !mmc_blk_reset(md, card->host, type))
- goto retry;
- if (!err)
- mmc_blk_reset_success(md, type);
- out:
- blk_mq_end_request(req, status);
- }
- static void mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
- {
- struct mmc_blk_data *md = mq->blkdata;
- struct mmc_card *card = md->queue.card;
- int ret = 0;
- ret = mmc_flush_cache(card);
- blk_mq_end_request(req, ret ? BLK_STS_IOERR : BLK_STS_OK);
- }
- /*
- * Reformat current write as a reliable write, supporting
- * both legacy and the enhanced reliable write MMC cards.
- * In each transfer we'll handle only as much as a single
- * reliable write can handle, thus finish the request in
- * partial completions.
- */
- static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
- struct mmc_card *card,
- struct request *req)
- {
- if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
- /* Legacy mode imposes restrictions on transfers. */
- if (!IS_ALIGNED(blk_rq_pos(req), card->ext_csd.rel_sectors))
- brq->data.blocks = 1;
- if (brq->data.blocks > card->ext_csd.rel_sectors)
- brq->data.blocks = card->ext_csd.rel_sectors;
- else if (brq->data.blocks < card->ext_csd.rel_sectors)
- brq->data.blocks = 1;
- }
- }
- #define CMD_ERRORS_EXCL_OOR \
- (R1_ADDRESS_ERROR | /* Misaligned address */ \
- R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
- R1_WP_VIOLATION | /* Tried to write to protected block */ \
- R1_CARD_ECC_FAILED | /* Card ECC failed */ \
- R1_CC_ERROR | /* Card controller error */ \
- R1_ERROR) /* General/unknown error */
- #define CMD_ERRORS \
- (CMD_ERRORS_EXCL_OOR | \
- R1_OUT_OF_RANGE) /* Command argument out of range */ \
- static void mmc_blk_eval_resp_error(struct mmc_blk_request *brq)
- {
- u32 val;
- /*
- * Per the SD specification(physical layer version 4.10)[1],
- * section 4.3.3, it explicitly states that "When the last
- * block of user area is read using CMD18, the host should
- * ignore OUT_OF_RANGE error that may occur even the sequence
- * is correct". And JESD84-B51 for eMMC also has a similar
- * statement on section 6.8.3.
- *
- * Multiple block read/write could be done by either predefined
- * method, namely CMD23, or open-ending mode. For open-ending mode,
- * we should ignore the OUT_OF_RANGE error as it's normal behaviour.
- *
- * However the spec[1] doesn't tell us whether we should also
- * ignore that for predefined method. But per the spec[1], section
- * 4.15 Set Block Count Command, it says"If illegal block count
- * is set, out of range error will be indicated during read/write
- * operation (For example, data transfer is stopped at user area
- * boundary)." In another word, we could expect a out of range error
- * in the response for the following CMD18/25. And if argument of
- * CMD23 + the argument of CMD18/25 exceed the max number of blocks,
- * we could also expect to get a -ETIMEDOUT or any error number from
- * the host drivers due to missing data response(for write)/data(for
- * read), as the cards will stop the data transfer by itself per the
- * spec. So we only need to check R1_OUT_OF_RANGE for open-ending mode.
- */
- if (!brq->stop.error) {
- bool oor_with_open_end;
- /* If there is no error yet, check R1 response */
- val = brq->stop.resp[0] & CMD_ERRORS;
- oor_with_open_end = val & R1_OUT_OF_RANGE && !brq->mrq.sbc;
- if (val && !oor_with_open_end)
- brq->stop.error = -EIO;
- }
- }
- static void mmc_blk_data_prep(struct mmc_queue *mq, struct mmc_queue_req *mqrq,
- int disable_multi, bool *do_rel_wr_p,
- bool *do_data_tag_p)
- {
- struct mmc_blk_data *md = mq->blkdata;
- struct mmc_card *card = md->queue.card;
- struct mmc_blk_request *brq = &mqrq->brq;
- struct request *req = mmc_queue_req_to_req(mqrq);
- bool do_rel_wr, do_data_tag;
- /*
- * Reliable writes are used to implement Forced Unit Access and
- * are supported only on MMCs.
- */
- do_rel_wr = (req->cmd_flags & REQ_FUA) &&
- rq_data_dir(req) == WRITE &&
- (md->flags & MMC_BLK_REL_WR);
- memset(brq, 0, sizeof(struct mmc_blk_request));
- mmc_crypto_prepare_req(mqrq);
- brq->mrq.data = &brq->data;
- brq->mrq.tag = req->tag;
- brq->stop.opcode = MMC_STOP_TRANSMISSION;
- brq->stop.arg = 0;
- if (rq_data_dir(req) == READ) {
- brq->data.flags = MMC_DATA_READ;
- brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
- } else {
- brq->data.flags = MMC_DATA_WRITE;
- brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
- }
- brq->data.blksz = 512;
- brq->data.blocks = blk_rq_sectors(req);
- brq->data.blk_addr = blk_rq_pos(req);
- /*
- * The command queue supports 2 priorities: "high" (1) and "simple" (0).
- * The eMMC will give "high" priority tasks priority over "simple"
- * priority tasks. Here we always set "simple" priority by not setting
- * MMC_DATA_PRIO.
- */
- /*
- * The block layer doesn't support all sector count
- * restrictions, so we need to be prepared for too big
- * requests.
- */
- if (brq->data.blocks > card->host->max_blk_count)
- brq->data.blocks = card->host->max_blk_count;
- if (brq->data.blocks > 1) {
- /*
- * Some SD cards in SPI mode return a CRC error or even lock up
- * completely when trying to read the last block using a
- * multiblock read command.
- */
- if (mmc_host_is_spi(card->host) && (rq_data_dir(req) == READ) &&
- (blk_rq_pos(req) + blk_rq_sectors(req) ==
- get_capacity(md->disk)))
- brq->data.blocks--;
- /*
- * After a read error, we redo the request one sector
- * at a time in order to accurately determine which
- * sectors can be read successfully.
- */
- if (disable_multi)
- brq->data.blocks = 1;
- /*
- * Some controllers have HW issues while operating
- * in multiple I/O mode
- */
- if (card->host->ops->multi_io_quirk)
- brq->data.blocks = card->host->ops->multi_io_quirk(card,
- (rq_data_dir(req) == READ) ?
- MMC_DATA_READ : MMC_DATA_WRITE,
- brq->data.blocks);
- }
- if (do_rel_wr) {
- mmc_apply_rel_rw(brq, card, req);
- brq->data.flags |= MMC_DATA_REL_WR;
- }
- /*
- * Data tag is used only during writing meta data to speed
- * up write and any subsequent read of this meta data
- */
- do_data_tag = card->ext_csd.data_tag_unit_size &&
- (req->cmd_flags & REQ_META) &&
- (rq_data_dir(req) == WRITE) &&
- ((brq->data.blocks * brq->data.blksz) >=
- card->ext_csd.data_tag_unit_size);
- if (do_data_tag)
- brq->data.flags |= MMC_DATA_DAT_TAG;
- mmc_set_data_timeout(&brq->data, card);
- brq->data.sg = mqrq->sg;
- brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
- /*
- * Adjust the sg list so it is the same size as the
- * request.
- */
- if (brq->data.blocks != blk_rq_sectors(req)) {
- int i, data_size = brq->data.blocks << 9;
- struct scatterlist *sg;
- for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
- data_size -= sg->length;
- if (data_size <= 0) {
- sg->length += data_size;
- i++;
- break;
- }
- }
- brq->data.sg_len = i;
- }
- if (do_rel_wr_p)
- *do_rel_wr_p = do_rel_wr;
- if (do_data_tag_p)
- *do_data_tag_p = do_data_tag;
- }
- #define MMC_CQE_RETRIES 2
- static void mmc_blk_cqe_complete_rq(struct mmc_queue *mq, struct request *req)
- {
- struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
- struct mmc_request *mrq = &mqrq->brq.mrq;
- struct request_queue *q = req->q;
- struct mmc_host *host = mq->card->host;
- enum mmc_issue_type issue_type = mmc_issue_type(mq, req);
- unsigned long flags;
- bool put_card;
- int err;
- mmc_cqe_post_req(host, mrq);
- if (mrq->cmd && mrq->cmd->error)
- err = mrq->cmd->error;
- else if (mrq->data && mrq->data->error)
- err = mrq->data->error;
- else
- err = 0;
- if (err) {
- if (mqrq->retries++ < MMC_CQE_RETRIES)
- blk_mq_requeue_request(req, true);
- else
- blk_mq_end_request(req, BLK_STS_IOERR);
- } else if (mrq->data) {
- if (blk_update_request(req, BLK_STS_OK, mrq->data->bytes_xfered))
- blk_mq_requeue_request(req, true);
- else
- __blk_mq_end_request(req, BLK_STS_OK);
- } else {
- blk_mq_end_request(req, BLK_STS_OK);
- }
- spin_lock_irqsave(&mq->lock, flags);
- mq->in_flight[issue_type] -= 1;
- put_card = (mmc_tot_in_flight(mq) == 0);
- mmc_cqe_check_busy(mq);
- spin_unlock_irqrestore(&mq->lock, flags);
- if (!mq->cqe_busy)
- blk_mq_run_hw_queues(q, true);
- if (put_card)
- mmc_put_card(mq->card, &mq->ctx);
- }
- void mmc_blk_cqe_recovery(struct mmc_queue *mq)
- {
- struct mmc_card *card = mq->card;
- struct mmc_host *host = card->host;
- int err;
- pr_debug("%s: CQE recovery start\n", mmc_hostname(host));
- err = mmc_cqe_recovery(host);
- if (err)
- mmc_blk_reset(mq->blkdata, host, MMC_BLK_CQE_RECOVERY);
- else
- mmc_blk_reset_success(mq->blkdata, MMC_BLK_CQE_RECOVERY);
- pr_debug("%s: CQE recovery done\n", mmc_hostname(host));
- }
- static void mmc_blk_cqe_req_done(struct mmc_request *mrq)
- {
- struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req,
- brq.mrq);
- struct request *req = mmc_queue_req_to_req(mqrq);
- struct request_queue *q = req->q;
- struct mmc_queue *mq = q->queuedata;
- /*
- * Block layer timeouts race with completions which means the normal
- * completion path cannot be used during recovery.
- */
- if (mq->in_recovery)
- mmc_blk_cqe_complete_rq(mq, req);
- else if (likely(!blk_should_fake_timeout(req->q)))
- blk_mq_complete_request(req);
- }
- static int mmc_blk_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq)
- {
- mrq->done = mmc_blk_cqe_req_done;
- mrq->recovery_notifier = mmc_cqe_recovery_notifier;
- return mmc_cqe_start_req(host, mrq);
- }
- static struct mmc_request *mmc_blk_cqe_prep_dcmd(struct mmc_queue_req *mqrq,
- struct request *req)
- {
- struct mmc_blk_request *brq = &mqrq->brq;
- memset(brq, 0, sizeof(*brq));
- brq->mrq.cmd = &brq->cmd;
- brq->mrq.tag = req->tag;
- return &brq->mrq;
- }
- static int mmc_blk_cqe_issue_flush(struct mmc_queue *mq, struct request *req)
- {
- struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
- struct mmc_request *mrq = mmc_blk_cqe_prep_dcmd(mqrq, req);
- mrq->cmd->opcode = MMC_SWITCH;
- mrq->cmd->arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
- (EXT_CSD_FLUSH_CACHE << 16) |
- (1 << 8) |
- EXT_CSD_CMD_SET_NORMAL;
- mrq->cmd->flags = MMC_CMD_AC | MMC_RSP_R1B;
- return mmc_blk_cqe_start_req(mq->card->host, mrq);
- }
- static int mmc_blk_hsq_issue_rw_rq(struct mmc_queue *mq, struct request *req)
- {
- struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
- struct mmc_host *host = mq->card->host;
- int err;
- mmc_blk_rw_rq_prep(mqrq, mq->card, 0, mq);
- mqrq->brq.mrq.done = mmc_blk_hsq_req_done;
- mmc_pre_req(host, &mqrq->brq.mrq);
- err = mmc_cqe_start_req(host, &mqrq->brq.mrq);
- if (err)
- mmc_post_req(host, &mqrq->brq.mrq, err);
- return err;
- }
- static int mmc_blk_cqe_issue_rw_rq(struct mmc_queue *mq, struct request *req)
- {
- struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
- struct mmc_host *host = mq->card->host;
- if (host->hsq_enabled)
- return mmc_blk_hsq_issue_rw_rq(mq, req);
- mmc_blk_data_prep(mq, mqrq, 0, NULL, NULL);
- return mmc_blk_cqe_start_req(mq->card->host, &mqrq->brq.mrq);
- }
- static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
- struct mmc_card *card,
- int disable_multi,
- struct mmc_queue *mq)
- {
- u32 readcmd, writecmd;
- struct mmc_blk_request *brq = &mqrq->brq;
- struct request *req = mmc_queue_req_to_req(mqrq);
- struct mmc_blk_data *md = mq->blkdata;
- bool do_rel_wr, do_data_tag;
- mmc_blk_data_prep(mq, mqrq, disable_multi, &do_rel_wr, &do_data_tag);
- brq->mrq.cmd = &brq->cmd;
- brq->cmd.arg = blk_rq_pos(req);
- if (!mmc_card_blockaddr(card))
- brq->cmd.arg <<= 9;
- brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
- if (brq->data.blocks > 1 || do_rel_wr) {
- /* SPI multiblock writes terminate using a special
- * token, not a STOP_TRANSMISSION request.
- */
- if (!mmc_host_is_spi(card->host) ||
- rq_data_dir(req) == READ)
- brq->mrq.stop = &brq->stop;
- readcmd = MMC_READ_MULTIPLE_BLOCK;
- writecmd = MMC_WRITE_MULTIPLE_BLOCK;
- } else {
- brq->mrq.stop = NULL;
- readcmd = MMC_READ_SINGLE_BLOCK;
- writecmd = MMC_WRITE_BLOCK;
- }
- brq->cmd.opcode = rq_data_dir(req) == READ ? readcmd : writecmd;
- /*
- * Pre-defined multi-block transfers are preferable to
- * open ended-ones (and necessary for reliable writes).
- * However, it is not sufficient to just send CMD23,
- * and avoid the final CMD12, as on an error condition
- * CMD12 (stop) needs to be sent anyway. This, coupled
- * with Auto-CMD23 enhancements provided by some
- * hosts, means that the complexity of dealing
- * with this is best left to the host. If CMD23 is
- * supported by card and host, we'll fill sbc in and let
- * the host deal with handling it correctly. This means
- * that for hosts that don't expose MMC_CAP_CMD23, no
- * change of behavior will be observed.
- *
- * N.B: Some MMC cards experience perf degradation.
- * We'll avoid using CMD23-bounded multiblock writes for
- * these, while retaining features like reliable writes.
- */
- if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
- (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
- do_data_tag)) {
- brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
- brq->sbc.arg = brq->data.blocks |
- (do_rel_wr ? (1 << 31) : 0) |
- (do_data_tag ? (1 << 29) : 0);
- brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
- brq->mrq.sbc = &brq->sbc;
- }
- }
- #define MMC_MAX_RETRIES 5
- #define MMC_DATA_RETRIES 2
- #define MMC_NO_RETRIES (MMC_MAX_RETRIES + 1)
- static int mmc_blk_send_stop(struct mmc_card *card, unsigned int timeout)
- {
- struct mmc_command cmd = {
- .opcode = MMC_STOP_TRANSMISSION,
- .flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC,
- /* Some hosts wait for busy anyway, so provide a busy timeout */
- .busy_timeout = timeout,
- };
- return mmc_wait_for_cmd(card->host, &cmd, 5);
- }
- static int mmc_blk_fix_state(struct mmc_card *card, struct request *req)
- {
- struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
- struct mmc_blk_request *brq = &mqrq->brq;
- unsigned int timeout = mmc_blk_data_timeout_ms(card->host, &brq->data);
- int err;
- mmc_retune_hold_now(card->host);
- mmc_blk_send_stop(card, timeout);
- err = card_busy_detect(card, timeout, NULL);
- mmc_retune_release(card->host);
- return err;
- }
- #define MMC_READ_SINGLE_RETRIES 2
- /* Single sector read during recovery */
- static void mmc_blk_read_single(struct mmc_queue *mq, struct request *req)
- {
- struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
- struct mmc_request *mrq = &mqrq->brq.mrq;
- struct mmc_card *card = mq->card;
- struct mmc_host *host = card->host;
- blk_status_t error = BLK_STS_OK;
- do {
- u32 status;
- int err;
- int retries = 0;
- while (retries++ <= MMC_READ_SINGLE_RETRIES) {
- mmc_blk_rw_rq_prep(mqrq, card, 1, mq);
- mmc_wait_for_req(host, mrq);
- err = mmc_send_status(card, &status);
- if (err)
- goto error_exit;
- if (!mmc_host_is_spi(host) &&
- !mmc_ready_for_data(status)) {
- err = mmc_blk_fix_state(card, req);
- if (err)
- goto error_exit;
- }
- if (!mrq->cmd->error)
- break;
- }
- if (mrq->cmd->error ||
- mrq->data->error ||
- (!mmc_host_is_spi(host) &&
- (mrq->cmd->resp[0] & CMD_ERRORS || status & CMD_ERRORS)))
- error = BLK_STS_IOERR;
- else
- error = BLK_STS_OK;
- } while (blk_update_request(req, error, 512));
- return;
- error_exit:
- mrq->data->bytes_xfered = 0;
- blk_update_request(req, BLK_STS_IOERR, 512);
- /* Let it try the remaining request again */
- if (mqrq->retries > MMC_MAX_RETRIES - 1)
- mqrq->retries = MMC_MAX_RETRIES - 1;
- }
- static inline bool mmc_blk_oor_valid(struct mmc_blk_request *brq)
- {
- return !!brq->mrq.sbc;
- }
- static inline u32 mmc_blk_stop_err_bits(struct mmc_blk_request *brq)
- {
- return mmc_blk_oor_valid(brq) ? CMD_ERRORS : CMD_ERRORS_EXCL_OOR;
- }
- /*
- * Check for errors the host controller driver might not have seen such as
- * response mode errors or invalid card state.
- */
- static bool mmc_blk_status_error(struct request *req, u32 status)
- {
- struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
- struct mmc_blk_request *brq = &mqrq->brq;
- struct mmc_queue *mq = req->q->queuedata;
- u32 stop_err_bits;
- if (mmc_host_is_spi(mq->card->host))
- return false;
- stop_err_bits = mmc_blk_stop_err_bits(brq);
- return brq->cmd.resp[0] & CMD_ERRORS ||
- brq->stop.resp[0] & stop_err_bits ||
- status & stop_err_bits ||
- (rq_data_dir(req) == WRITE && !mmc_ready_for_data(status));
- }
- static inline bool mmc_blk_cmd_started(struct mmc_blk_request *brq)
- {
- return !brq->sbc.error && !brq->cmd.error &&
- !(brq->cmd.resp[0] & CMD_ERRORS);
- }
- /*
- * Requests are completed by mmc_blk_mq_complete_rq() which sets simple
- * policy:
- * 1. A request that has transferred at least some data is considered
- * successful and will be requeued if there is remaining data to
- * transfer.
- * 2. Otherwise the number of retries is incremented and the request
- * will be requeued if there are remaining retries.
- * 3. Otherwise the request will be errored out.
- * That means mmc_blk_mq_complete_rq() is controlled by bytes_xfered and
- * mqrq->retries. So there are only 4 possible actions here:
- * 1. do not accept the bytes_xfered value i.e. set it to zero
- * 2. change mqrq->retries to determine the number of retries
- * 3. try to reset the card
- * 4. read one sector at a time
- */
- static void mmc_blk_mq_rw_recovery(struct mmc_queue *mq, struct request *req)
- {
- int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
- struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
- struct mmc_blk_request *brq = &mqrq->brq;
- struct mmc_blk_data *md = mq->blkdata;
- struct mmc_card *card = mq->card;
- u32 status;
- u32 blocks;
- int err;
- /*
- * Some errors the host driver might not have seen. Set the number of
- * bytes transferred to zero in that case.
- */
- err = __mmc_send_status(card, &status, 0);
- if (err || mmc_blk_status_error(req, status))
- brq->data.bytes_xfered = 0;
- mmc_retune_release(card->host);
- /*
- * Try again to get the status. This also provides an opportunity for
- * re-tuning.
- */
- if (err)
- err = __mmc_send_status(card, &status, 0);
- /*
- * Nothing more to do after the number of bytes transferred has been
- * updated and there is no card.
- */
- if (err && mmc_detect_card_removed(card->host))
- return;
- /* Try to get back to "tran" state */
- if (!mmc_host_is_spi(mq->card->host) &&
- (err || !mmc_ready_for_data(status)))
- err = mmc_blk_fix_state(mq->card, req);
- /*
- * Special case for SD cards where the card might record the number of
- * blocks written.
- */
- if (!err && mmc_blk_cmd_started(brq) && mmc_card_sd(card) &&
- rq_data_dir(req) == WRITE) {
- if (mmc_sd_num_wr_blocks(card, &blocks))
- brq->data.bytes_xfered = 0;
- else
- brq->data.bytes_xfered = blocks << 9;
- }
- /* Reset if the card is in a bad state */
- if (!mmc_host_is_spi(mq->card->host) &&
- err && mmc_blk_reset(md, card->host, type)) {
- pr_err("%s: recovery failed!\n", req->rq_disk->disk_name);
- mqrq->retries = MMC_NO_RETRIES;
- trace_android_vh_mmc_blk_mq_rw_recovery(card);
- return;
- }
- /*
- * If anything was done, just return and if there is anything remaining
- * on the request it will get requeued.
- */
- if (brq->data.bytes_xfered)
- return;
- /* Reset before last retry */
- if (mqrq->retries + 1 == MMC_MAX_RETRIES)
- mmc_blk_reset(md, card->host, type);
- /* Command errors fail fast, so use all MMC_MAX_RETRIES */
- if (brq->sbc.error || brq->cmd.error)
- return;
- /* Reduce the remaining retries for data errors */
- if (mqrq->retries < MMC_MAX_RETRIES - MMC_DATA_RETRIES) {
- mqrq->retries = MMC_MAX_RETRIES - MMC_DATA_RETRIES;
- return;
- }
- /* FIXME: Missing single sector read for large sector size */
- if (!mmc_large_sector(card) && rq_data_dir(req) == READ &&
- brq->data.blocks > 1) {
- /* Read one sector at a time */
- mmc_blk_read_single(mq, req);
- return;
- }
- }
- static inline bool mmc_blk_rq_error(struct mmc_blk_request *brq)
- {
- mmc_blk_eval_resp_error(brq);
- return brq->sbc.error || brq->cmd.error || brq->stop.error ||
- brq->data.error || brq->cmd.resp[0] & CMD_ERRORS;
- }
- static int mmc_blk_card_busy(struct mmc_card *card, struct request *req)
- {
- struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
- u32 status = 0;
- int err;
- if (mmc_host_is_spi(card->host) || rq_data_dir(req) == READ)
- return 0;
- err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, &status);
- /*
- * Do not assume data transferred correctly if there are any error bits
- * set.
- */
- if (status & mmc_blk_stop_err_bits(&mqrq->brq)) {
- mqrq->brq.data.bytes_xfered = 0;
- err = err ? err : -EIO;
- }
- /* Copy the exception bit so it will be seen later on */
- if (mmc_card_mmc(card) && status & R1_EXCEPTION_EVENT)
- mqrq->brq.cmd.resp[0] |= R1_EXCEPTION_EVENT;
- return err;
- }
- static inline void mmc_blk_rw_reset_success(struct mmc_queue *mq,
- struct request *req)
- {
- int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
- mmc_blk_reset_success(mq->blkdata, type);
- }
- static void mmc_blk_mq_complete_rq(struct mmc_queue *mq, struct request *req)
- {
- struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
- unsigned int nr_bytes = mqrq->brq.data.bytes_xfered;
- if (nr_bytes) {
- if (blk_update_request(req, BLK_STS_OK, nr_bytes))
- blk_mq_requeue_request(req, true);
- else
- __blk_mq_end_request(req, BLK_STS_OK);
- } else if (!blk_rq_bytes(req)) {
- __blk_mq_end_request(req, BLK_STS_IOERR);
- } else if (mqrq->retries++ < MMC_MAX_RETRIES) {
- blk_mq_requeue_request(req, true);
- } else {
- if (mmc_card_removed(mq->card))
- req->rq_flags |= RQF_QUIET;
- blk_mq_end_request(req, BLK_STS_IOERR);
- }
- }
- static bool mmc_blk_urgent_bkops_needed(struct mmc_queue *mq,
- struct mmc_queue_req *mqrq)
- {
- return mmc_card_mmc(mq->card) && !mmc_host_is_spi(mq->card->host) &&
- (mqrq->brq.cmd.resp[0] & R1_EXCEPTION_EVENT ||
- mqrq->brq.stop.resp[0] & R1_EXCEPTION_EVENT);
- }
- static void mmc_blk_urgent_bkops(struct mmc_queue *mq,
- struct mmc_queue_req *mqrq)
- {
- if (mmc_blk_urgent_bkops_needed(mq, mqrq))
- mmc_run_bkops(mq->card);
- }
- static void mmc_blk_hsq_req_done(struct mmc_request *mrq)
- {
- struct mmc_queue_req *mqrq =
- container_of(mrq, struct mmc_queue_req, brq.mrq);
- struct request *req = mmc_queue_req_to_req(mqrq);
- struct request_queue *q = req->q;
- struct mmc_queue *mq = q->queuedata;
- struct mmc_host *host = mq->card->host;
- unsigned long flags;
- if (mmc_blk_rq_error(&mqrq->brq) ||
- mmc_blk_urgent_bkops_needed(mq, mqrq)) {
- spin_lock_irqsave(&mq->lock, flags);
- mq->recovery_needed = true;
- mq->recovery_req = req;
- spin_unlock_irqrestore(&mq->lock, flags);
- host->cqe_ops->cqe_recovery_start(host);
- schedule_work(&mq->recovery_work);
- return;
- }
- mmc_blk_rw_reset_success(mq, req);
- /*
- * Block layer timeouts race with completions which means the normal
- * completion path cannot be used during recovery.
- */
- if (mq->in_recovery)
- mmc_blk_cqe_complete_rq(mq, req);
- else if (likely(!blk_should_fake_timeout(req->q)))
- blk_mq_complete_request(req);
- }
- void mmc_blk_mq_complete(struct request *req)
- {
- struct mmc_queue *mq = req->q->queuedata;
- if (mq->use_cqe)
- mmc_blk_cqe_complete_rq(mq, req);
- else if (likely(!blk_should_fake_timeout(req->q)))
- mmc_blk_mq_complete_rq(mq, req);
- }
- static void mmc_blk_mq_poll_completion(struct mmc_queue *mq,
- struct request *req)
- {
- struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
- struct mmc_host *host = mq->card->host;
- if (mmc_blk_rq_error(&mqrq->brq) ||
- mmc_blk_card_busy(mq->card, req)) {
- mmc_blk_mq_rw_recovery(mq, req);
- } else {
- mmc_blk_rw_reset_success(mq, req);
- mmc_retune_release(host);
- }
- mmc_blk_urgent_bkops(mq, mqrq);
- }
- static void mmc_blk_mq_dec_in_flight(struct mmc_queue *mq, struct request *req)
- {
- unsigned long flags;
- bool put_card;
- spin_lock_irqsave(&mq->lock, flags);
- mq->in_flight[mmc_issue_type(mq, req)] -= 1;
- put_card = (mmc_tot_in_flight(mq) == 0);
- spin_unlock_irqrestore(&mq->lock, flags);
- if (put_card)
- mmc_put_card(mq->card, &mq->ctx);
- }
- static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req)
- {
- struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
- struct mmc_request *mrq = &mqrq->brq.mrq;
- struct mmc_host *host = mq->card->host;
- mmc_post_req(host, mrq, 0);
- /*
- * Block layer timeouts race with completions which means the normal
- * completion path cannot be used during recovery.
- */
- if (mq->in_recovery)
- mmc_blk_mq_complete_rq(mq, req);
- else if (likely(!blk_should_fake_timeout(req->q)))
- blk_mq_complete_request(req);
- mmc_blk_mq_dec_in_flight(mq, req);
- }
- void mmc_blk_mq_recovery(struct mmc_queue *mq)
- {
- struct request *req = mq->recovery_req;
- struct mmc_host *host = mq->card->host;
- struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
- mq->recovery_req = NULL;
- mq->rw_wait = false;
- if (mmc_blk_rq_error(&mqrq->brq)) {
- mmc_retune_hold_now(host);
- mmc_blk_mq_rw_recovery(mq, req);
- }
- mmc_blk_urgent_bkops(mq, mqrq);
- mmc_blk_mq_post_req(mq, req);
- }
- static void mmc_blk_mq_complete_prev_req(struct mmc_queue *mq,
- struct request **prev_req)
- {
- if (mmc_host_done_complete(mq->card->host))
- return;
- mutex_lock(&mq->complete_lock);
- if (!mq->complete_req)
- goto out_unlock;
- mmc_blk_mq_poll_completion(mq, mq->complete_req);
- if (prev_req)
- *prev_req = mq->complete_req;
- else
- mmc_blk_mq_post_req(mq, mq->complete_req);
- mq->complete_req = NULL;
- out_unlock:
- mutex_unlock(&mq->complete_lock);
- }
- void mmc_blk_mq_complete_work(struct work_struct *work)
- {
- struct mmc_queue *mq = container_of(work, struct mmc_queue,
- complete_work);
- mmc_blk_mq_complete_prev_req(mq, NULL);
- }
- static void mmc_blk_mq_req_done(struct mmc_request *mrq)
- {
- struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req,
- brq.mrq);
- struct request *req = mmc_queue_req_to_req(mqrq);
- struct request_queue *q = req->q;
- struct mmc_queue *mq = q->queuedata;
- struct mmc_host *host = mq->card->host;
- unsigned long flags;
- if (!mmc_host_done_complete(host)) {
- bool waiting;
- /*
- * We cannot complete the request in this context, so record
- * that there is a request to complete, and that a following
- * request does not need to wait (although it does need to
- * complete complete_req first).
- */
- spin_lock_irqsave(&mq->lock, flags);
- mq->complete_req = req;
- mq->rw_wait = false;
- waiting = mq->waiting;
- spin_unlock_irqrestore(&mq->lock, flags);
- /*
- * If 'waiting' then the waiting task will complete this
- * request, otherwise queue a work to do it. Note that
- * complete_work may still race with the dispatch of a following
- * request.
- */
- if (waiting)
- wake_up(&mq->wait);
- else
- queue_work(mq->card->complete_wq, &mq->complete_work);
- return;
- }
- /* Take the recovery path for errors or urgent background operations */
- if (mmc_blk_rq_error(&mqrq->brq) ||
- mmc_blk_urgent_bkops_needed(mq, mqrq)) {
- spin_lock_irqsave(&mq->lock, flags);
- mq->recovery_needed = true;
- mq->recovery_req = req;
- spin_unlock_irqrestore(&mq->lock, flags);
- wake_up(&mq->wait);
- schedule_work(&mq->recovery_work);
- return;
- }
- mmc_blk_rw_reset_success(mq, req);
- mq->rw_wait = false;
- wake_up(&mq->wait);
- mmc_blk_mq_post_req(mq, req);
- }
- static bool mmc_blk_rw_wait_cond(struct mmc_queue *mq, int *err)
- {
- unsigned long flags;
- bool done;
- /*
- * Wait while there is another request in progress, but not if recovery
- * is needed. Also indicate whether there is a request waiting to start.
- */
- spin_lock_irqsave(&mq->lock, flags);
- if (mq->recovery_needed) {
- *err = -EBUSY;
- done = true;
- } else {
- done = !mq->rw_wait;
- }
- mq->waiting = !done;
- spin_unlock_irqrestore(&mq->lock, flags);
- return done;
- }
- static int mmc_blk_rw_wait(struct mmc_queue *mq, struct request **prev_req)
- {
- int err = 0;
- wait_event(mq->wait, mmc_blk_rw_wait_cond(mq, &err));
- /* Always complete the previous request if there is one */
- mmc_blk_mq_complete_prev_req(mq, prev_req);
- return err;
- }
- static int mmc_blk_mq_issue_rw_rq(struct mmc_queue *mq,
- struct request *req)
- {
- struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
- struct mmc_host *host = mq->card->host;
- struct request *prev_req = NULL;
- int err = 0;
- mmc_blk_rw_rq_prep(mqrq, mq->card, 0, mq);
- mqrq->brq.mrq.done = mmc_blk_mq_req_done;
- mmc_pre_req(host, &mqrq->brq.mrq);
- err = mmc_blk_rw_wait(mq, &prev_req);
- if (err)
- goto out_post_req;
- mq->rw_wait = true;
- err = mmc_start_request(host, &mqrq->brq.mrq);
- if (prev_req)
- mmc_blk_mq_post_req(mq, prev_req);
- if (err)
- mq->rw_wait = false;
- /* Release re-tuning here where there is no synchronization required */
- if (err || mmc_host_done_complete(host))
- mmc_retune_release(host);
- out_post_req:
- if (err)
- mmc_post_req(host, &mqrq->brq.mrq, err);
- return err;
- }
- static int mmc_blk_wait_for_idle(struct mmc_queue *mq, struct mmc_host *host)
- {
- if (mq->use_cqe)
- return host->cqe_ops->cqe_wait_for_idle(host);
- return mmc_blk_rw_wait(mq, NULL);
- }
- enum mmc_issued mmc_blk_mq_issue_rq(struct mmc_queue *mq, struct request *req)
- {
- struct mmc_blk_data *md = mq->blkdata;
- struct mmc_card *card = md->queue.card;
- struct mmc_host *host = card->host;
- int ret;
- ret = mmc_blk_part_switch(card, md->part_type);
- if (ret)
- return MMC_REQ_FAILED_TO_START;
- switch (mmc_issue_type(mq, req)) {
- case MMC_ISSUE_SYNC:
- ret = mmc_blk_wait_for_idle(mq, host);
- if (ret)
- return MMC_REQ_BUSY;
- switch (req_op(req)) {
- case REQ_OP_DRV_IN:
- case REQ_OP_DRV_OUT:
- mmc_blk_issue_drv_op(mq, req);
- break;
- case REQ_OP_DISCARD:
- mmc_blk_issue_discard_rq(mq, req);
- break;
- case REQ_OP_SECURE_ERASE:
- mmc_blk_issue_secdiscard_rq(mq, req);
- break;
- case REQ_OP_FLUSH:
- mmc_blk_issue_flush(mq, req);
- break;
- default:
- WARN_ON_ONCE(1);
- return MMC_REQ_FAILED_TO_START;
- }
- return MMC_REQ_FINISHED;
- case MMC_ISSUE_DCMD:
- case MMC_ISSUE_ASYNC:
- switch (req_op(req)) {
- case REQ_OP_FLUSH:
- if (!mmc_cache_enabled(host)) {
- blk_mq_end_request(req, BLK_STS_OK);
- return MMC_REQ_FINISHED;
- }
- ret = mmc_blk_cqe_issue_flush(mq, req);
- break;
- case REQ_OP_READ:
- case REQ_OP_WRITE:
- if (mq->use_cqe)
- ret = mmc_blk_cqe_issue_rw_rq(mq, req);
- else
- ret = mmc_blk_mq_issue_rw_rq(mq, req);
- break;
- default:
- WARN_ON_ONCE(1);
- ret = -EINVAL;
- }
- if (!ret)
- return MMC_REQ_STARTED;
- return ret == -EBUSY ? MMC_REQ_BUSY : MMC_REQ_FAILED_TO_START;
- default:
- WARN_ON_ONCE(1);
- return MMC_REQ_FAILED_TO_START;
- }
- }
- static inline int mmc_blk_readonly(struct mmc_card *card)
- {
- return mmc_card_readonly(card) ||
- !(card->csd.cmdclass & CCC_BLOCK_WRITE);
- }
- static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
- struct device *parent,
- sector_t size,
- bool default_ro,
- const char *subname,
- int area_type)
- {
- struct mmc_blk_data *md;
- int devidx, ret;
- devidx = ida_simple_get(&mmc_blk_ida, 0, max_devices, GFP_KERNEL);
- if (devidx < 0) {
- /*
- * We get -ENOSPC because there are no more any available
- * devidx. The reason may be that, either userspace haven't yet
- * unmounted the partitions, which postpones mmc_blk_release()
- * from being called, or the device has more partitions than
- * what we support.
- */
- if (devidx == -ENOSPC)
- dev_err(mmc_dev(card->host),
- "no more device IDs available\n");
- return ERR_PTR(devidx);
- }
- md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
- if (!md) {
- ret = -ENOMEM;
- goto out;
- }
- md->area_type = area_type;
- /*
- * Set the read-only status based on the supported commands
- * and the write protect switch.
- */
- md->read_only = mmc_blk_readonly(card);
- md->disk = alloc_disk(perdev_minors);
- if (md->disk == NULL) {
- ret = -ENOMEM;
- goto err_kfree;
- }
- INIT_LIST_HEAD(&md->part);
- INIT_LIST_HEAD(&md->rpmbs);
- md->usage = 1;
- ret = mmc_init_queue(&md->queue, card);
- if (ret)
- goto err_putdisk;
- md->queue.blkdata = md;
- /*
- * Keep an extra reference to the queue so that we can shutdown the
- * queue (i.e. call blk_cleanup_queue()) while there are still
- * references to the 'md'. The corresponding blk_put_queue() is in
- * mmc_blk_put().
- */
- if (!blk_get_queue(md->queue.queue)) {
- mmc_cleanup_queue(&md->queue);
- ret = -ENODEV;
- goto err_putdisk;
- }
- md->disk->major = MMC_BLOCK_MAJOR;
- md->disk->first_minor = devidx * perdev_minors;
- md->disk->fops = &mmc_bdops;
- md->disk->private_data = md;
- md->disk->queue = md->queue.queue;
- md->parent = parent;
- set_disk_ro(md->disk, md->read_only || default_ro);
- md->disk->flags = GENHD_FL_EXT_DEVT;
- if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
- md->disk->flags |= GENHD_FL_NO_PART_SCAN
- | GENHD_FL_SUPPRESS_PARTITION_INFO;
- /*
- * As discussed on lkml, GENHD_FL_REMOVABLE should:
- *
- * - be set for removable media with permanent block devices
- * - be unset for removable block devices with permanent media
- *
- * Since MMC block devices clearly fall under the second
- * case, we do not set GENHD_FL_REMOVABLE. Userspace
- * should use the block device creation/destruction hotplug
- * messages to tell when the card is present.
- */
- snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
- "mmcblk%u%s", card->host->index, subname ? subname : "");
- set_capacity(md->disk, size);
- if (mmc_host_cmd23(card->host)) {
- if ((mmc_card_mmc(card) &&
- card->csd.mmca_vsn >= CSD_SPEC_VER_3) ||
- (mmc_card_sd(card) &&
- card->scr.cmds & SD_SCR_CMD23_SUPPORT))
- md->flags |= MMC_BLK_CMD23;
- }
- if (mmc_card_mmc(card) &&
- md->flags & MMC_BLK_CMD23 &&
- ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
- card->ext_csd.rel_sectors)) {
- md->flags |= MMC_BLK_REL_WR;
- blk_queue_write_cache(md->queue.queue, true, true);
- }
- return md;
- err_putdisk:
- put_disk(md->disk);
- err_kfree:
- kfree(md);
- out:
- ida_simple_remove(&mmc_blk_ida, devidx);
- return ERR_PTR(ret);
- }
- static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
- {
- sector_t size;
- if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
- /*
- * The EXT_CSD sector count is in number or 512 byte
- * sectors.
- */
- size = card->ext_csd.sectors;
- } else {
- /*
- * The CSD capacity field is in units of read_blkbits.
- * set_capacity takes units of 512 bytes.
- */
- size = (typeof(sector_t))card->csd.capacity
- << (card->csd.read_blkbits - 9);
- }
- return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
- MMC_BLK_DATA_AREA_MAIN);
- }
- static int mmc_blk_alloc_part(struct mmc_card *card,
- struct mmc_blk_data *md,
- unsigned int part_type,
- sector_t size,
- bool default_ro,
- const char *subname,
- int area_type)
- {
- char cap_str[10];
- struct mmc_blk_data *part_md;
- part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
- subname, area_type);
- if (IS_ERR(part_md))
- return PTR_ERR(part_md);
- part_md->part_type = part_type;
- list_add(&part_md->part, &md->part);
- string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
- cap_str, sizeof(cap_str));
- pr_info("%s: %s %s partition %u %s\n",
- part_md->disk->disk_name, mmc_card_id(card),
- mmc_card_name(card), part_md->part_type, cap_str);
- return 0;
- }
- /**
- * mmc_rpmb_ioctl() - ioctl handler for the RPMB chardev
- * @filp: the character device file
- * @cmd: the ioctl() command
- * @arg: the argument from userspace
- *
- * This will essentially just redirect the ioctl()s coming in over to
- * the main block device spawning the RPMB character device.
- */
- static long mmc_rpmb_ioctl(struct file *filp, unsigned int cmd,
- unsigned long arg)
- {
- struct mmc_rpmb_data *rpmb = filp->private_data;
- int ret;
- switch (cmd) {
- case MMC_IOC_CMD:
- ret = mmc_blk_ioctl_cmd(rpmb->md,
- (struct mmc_ioc_cmd __user *)arg,
- rpmb);
- break;
- case MMC_IOC_MULTI_CMD:
- ret = mmc_blk_ioctl_multi_cmd(rpmb->md,
- (struct mmc_ioc_multi_cmd __user *)arg,
- rpmb);
- break;
- default:
- ret = -EINVAL;
- break;
- }
- return ret;
- }
- #ifdef CONFIG_COMPAT
- static long mmc_rpmb_ioctl_compat(struct file *filp, unsigned int cmd,
- unsigned long arg)
- {
- return mmc_rpmb_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
- }
- #endif
- static int mmc_rpmb_chrdev_open(struct inode *inode, struct file *filp)
- {
- struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev,
- struct mmc_rpmb_data, chrdev);
- get_device(&rpmb->dev);
- filp->private_data = rpmb;
- mmc_blk_get(rpmb->md->disk);
- return nonseekable_open(inode, filp);
- }
- static int mmc_rpmb_chrdev_release(struct inode *inode, struct file *filp)
- {
- struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev,
- struct mmc_rpmb_data, chrdev);
- mmc_blk_put(rpmb->md);
- put_device(&rpmb->dev);
- return 0;
- }
- static const struct file_operations mmc_rpmb_fileops = {
- .release = mmc_rpmb_chrdev_release,
- .open = mmc_rpmb_chrdev_open,
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .unlocked_ioctl = mmc_rpmb_ioctl,
- #ifdef CONFIG_COMPAT
- .compat_ioctl = mmc_rpmb_ioctl_compat,
- #endif
- };
- static void mmc_blk_rpmb_device_release(struct device *dev)
- {
- struct mmc_rpmb_data *rpmb = dev_get_drvdata(dev);
- ida_simple_remove(&mmc_rpmb_ida, rpmb->id);
- kfree(rpmb);
- }
- static int mmc_blk_alloc_rpmb_part(struct mmc_card *card,
- struct mmc_blk_data *md,
- unsigned int part_index,
- sector_t size,
- const char *subname)
- {
- int devidx, ret;
- char rpmb_name[DISK_NAME_LEN];
- char cap_str[10];
- struct mmc_rpmb_data *rpmb;
- /* This creates the minor number for the RPMB char device */
- devidx = ida_simple_get(&mmc_rpmb_ida, 0, max_devices, GFP_KERNEL);
- if (devidx < 0)
- return devidx;
- rpmb = kzalloc(sizeof(*rpmb), GFP_KERNEL);
- if (!rpmb) {
- ida_simple_remove(&mmc_rpmb_ida, devidx);
- return -ENOMEM;
- }
- snprintf(rpmb_name, sizeof(rpmb_name),
- "mmcblk%u%s", card->host->index, subname ? subname : "");
- rpmb->id = devidx;
- rpmb->part_index = part_index;
- rpmb->dev.init_name = rpmb_name;
- rpmb->dev.bus = &mmc_rpmb_bus_type;
- rpmb->dev.devt = MKDEV(MAJOR(mmc_rpmb_devt), rpmb->id);
- rpmb->dev.parent = &card->dev;
- rpmb->dev.release = mmc_blk_rpmb_device_release;
- device_initialize(&rpmb->dev);
- dev_set_drvdata(&rpmb->dev, rpmb);
- rpmb->md = md;
- cdev_init(&rpmb->chrdev, &mmc_rpmb_fileops);
- rpmb->chrdev.owner = THIS_MODULE;
- ret = cdev_device_add(&rpmb->chrdev, &rpmb->dev);
- if (ret) {
- pr_err("%s: could not add character device\n", rpmb_name);
- goto out_put_device;
- }
- list_add(&rpmb->node, &md->rpmbs);
- string_get_size((u64)size, 512, STRING_UNITS_2,
- cap_str, sizeof(cap_str));
- pr_info("%s: %s %s partition %u %s, chardev (%d:%d)\n",
- rpmb_name, mmc_card_id(card),
- mmc_card_name(card), EXT_CSD_PART_CONFIG_ACC_RPMB, cap_str,
- MAJOR(mmc_rpmb_devt), rpmb->id);
- return 0;
- out_put_device:
- put_device(&rpmb->dev);
- return ret;
- }
- static void mmc_blk_remove_rpmb_part(struct mmc_rpmb_data *rpmb)
- {
- cdev_device_del(&rpmb->chrdev, &rpmb->dev);
- put_device(&rpmb->dev);
- }
- /* MMC Physical partitions consist of two boot partitions and
- * up to four general purpose partitions.
- * For each partition enabled in EXT_CSD a block device will be allocatedi
- * to provide access to the partition.
- */
- static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
- {
- int idx, ret;
- if (!mmc_card_mmc(card))
- return 0;
- for (idx = 0; idx < card->nr_parts; idx++) {
- if (card->part[idx].area_type & MMC_BLK_DATA_AREA_RPMB) {
- /*
- * RPMB partitions does not provide block access, they
- * are only accessed using ioctl():s. Thus create
- * special RPMB block devices that do not have a
- * backing block queue for these.
- */
- ret = mmc_blk_alloc_rpmb_part(card, md,
- card->part[idx].part_cfg,
- card->part[idx].size >> 9,
- card->part[idx].name);
- if (ret)
- return ret;
- } else if (card->part[idx].size) {
- ret = mmc_blk_alloc_part(card, md,
- card->part[idx].part_cfg,
- card->part[idx].size >> 9,
- card->part[idx].force_ro,
- card->part[idx].name,
- card->part[idx].area_type);
- if (ret)
- return ret;
- }
- }
- return 0;
- }
- static void mmc_blk_remove_req(struct mmc_blk_data *md)
- {
- struct mmc_card *card;
- if (md) {
- /*
- * Flush remaining requests and free queues. It
- * is freeing the queue that stops new requests
- * from being accepted.
- */
- card = md->queue.card;
- if (md->disk->flags & GENHD_FL_UP) {
- device_remove_file(disk_to_dev(md->disk), &md->force_ro);
- if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
- card->ext_csd.boot_ro_lockable)
- device_remove_file(disk_to_dev(md->disk),
- &md->power_ro_lock);
- del_gendisk(md->disk);
- }
- mmc_cleanup_queue(&md->queue);
- mmc_blk_put(md);
- }
- }
- static void mmc_blk_remove_parts(struct mmc_card *card,
- struct mmc_blk_data *md)
- {
- struct list_head *pos, *q;
- struct mmc_blk_data *part_md;
- struct mmc_rpmb_data *rpmb;
- /* Remove RPMB partitions */
- list_for_each_safe(pos, q, &md->rpmbs) {
- rpmb = list_entry(pos, struct mmc_rpmb_data, node);
- list_del(pos);
- mmc_blk_remove_rpmb_part(rpmb);
- }
- /* Remove block partitions */
- list_for_each_safe(pos, q, &md->part) {
- part_md = list_entry(pos, struct mmc_blk_data, part);
- list_del(pos);
- mmc_blk_remove_req(part_md);
- }
- }
- static int mmc_add_disk(struct mmc_blk_data *md)
- {
- int ret;
- struct mmc_card *card = md->queue.card;
- device_add_disk(md->parent, md->disk, NULL);
- md->force_ro.show = force_ro_show;
- md->force_ro.store = force_ro_store;
- sysfs_attr_init(&md->force_ro.attr);
- md->force_ro.attr.name = "force_ro";
- md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
- ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
- if (ret)
- goto force_ro_fail;
- if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
- card->ext_csd.boot_ro_lockable) {
- umode_t mode;
- if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
- mode = S_IRUGO;
- else
- mode = S_IRUGO | S_IWUSR;
- md->power_ro_lock.show = power_ro_lock_show;
- md->power_ro_lock.store = power_ro_lock_store;
- sysfs_attr_init(&md->power_ro_lock.attr);
- md->power_ro_lock.attr.mode = mode;
- md->power_ro_lock.attr.name =
- "ro_lock_until_next_power_on";
- ret = device_create_file(disk_to_dev(md->disk),
- &md->power_ro_lock);
- if (ret)
- goto power_ro_lock_fail;
- }
- return ret;
- power_ro_lock_fail:
- device_remove_file(disk_to_dev(md->disk), &md->force_ro);
- force_ro_fail:
- del_gendisk(md->disk);
- return ret;
- }
- #ifdef CONFIG_DEBUG_FS
- static int mmc_dbg_card_status_get(void *data, u64 *val)
- {
- struct mmc_card *card = data;
- struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
- struct mmc_queue *mq = &md->queue;
- struct request *req;
- int ret;
- /* Ask the block layer about the card status */
- req = blk_get_request(mq->queue, REQ_OP_DRV_IN, 0);
- if (IS_ERR(req))
- return PTR_ERR(req);
- req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_CARD_STATUS;
- blk_execute_rq(mq->queue, NULL, req, 0);
- ret = req_to_mmc_queue_req(req)->drv_op_result;
- if (ret >= 0) {
- *val = ret;
- ret = 0;
- }
- blk_put_request(req);
- return ret;
- }
- DEFINE_DEBUGFS_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get,
- NULL, "%08llx\n");
- /* That is two digits * 512 + 1 for newline */
- #define EXT_CSD_STR_LEN 1025
- static int mmc_ext_csd_open(struct inode *inode, struct file *filp)
- {
- struct mmc_card *card = inode->i_private;
- struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
- struct mmc_queue *mq = &md->queue;
- struct request *req;
- char *buf;
- ssize_t n = 0;
- u8 *ext_csd;
- int err, i;
- buf = kmalloc(EXT_CSD_STR_LEN + 1, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- /* Ask the block layer for the EXT CSD */
- req = blk_get_request(mq->queue, REQ_OP_DRV_IN, 0);
- if (IS_ERR(req)) {
- err = PTR_ERR(req);
- goto out_free;
- }
- req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_EXT_CSD;
- req_to_mmc_queue_req(req)->drv_op_data = &ext_csd;
- blk_execute_rq(mq->queue, NULL, req, 0);
- err = req_to_mmc_queue_req(req)->drv_op_result;
- blk_put_request(req);
- if (err) {
- pr_err("FAILED %d\n", err);
- goto out_free;
- }
- for (i = 0; i < 512; i++)
- n += sprintf(buf + n, "%02x", ext_csd[i]);
- n += sprintf(buf + n, "\n");
- if (n != EXT_CSD_STR_LEN) {
- err = -EINVAL;
- kfree(ext_csd);
- goto out_free;
- }
- filp->private_data = buf;
- kfree(ext_csd);
- return 0;
- out_free:
- kfree(buf);
- return err;
- }
- static ssize_t mmc_ext_csd_read(struct file *filp, char __user *ubuf,
- size_t cnt, loff_t *ppos)
- {
- char *buf = filp->private_data;
- return simple_read_from_buffer(ubuf, cnt, ppos,
- buf, EXT_CSD_STR_LEN);
- }
- static int mmc_ext_csd_release(struct inode *inode, struct file *file)
- {
- kfree(file->private_data);
- return 0;
- }
- static const struct file_operations mmc_dbg_ext_csd_fops = {
- .open = mmc_ext_csd_open,
- .read = mmc_ext_csd_read,
- .release = mmc_ext_csd_release,
- .llseek = default_llseek,
- };
- static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md)
- {
- struct dentry *root;
- if (!card->debugfs_root)
- return 0;
- root = card->debugfs_root;
- if (mmc_card_mmc(card) || mmc_card_sd(card)) {
- md->status_dentry =
- debugfs_create_file_unsafe("status", 0400, root,
- card,
- &mmc_dbg_card_status_fops);
- if (!md->status_dentry)
- return -EIO;
- }
- if (mmc_card_mmc(card)) {
- md->ext_csd_dentry =
- debugfs_create_file("ext_csd", S_IRUSR, root, card,
- &mmc_dbg_ext_csd_fops);
- if (!md->ext_csd_dentry)
- return -EIO;
- }
- return 0;
- }
- static void mmc_blk_remove_debugfs(struct mmc_card *card,
- struct mmc_blk_data *md)
- {
- if (!card->debugfs_root)
- return;
- if (!IS_ERR_OR_NULL(md->status_dentry)) {
- debugfs_remove(md->status_dentry);
- md->status_dentry = NULL;
- }
- if (!IS_ERR_OR_NULL(md->ext_csd_dentry)) {
- debugfs_remove(md->ext_csd_dentry);
- md->ext_csd_dentry = NULL;
- }
- }
- #else
- static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md)
- {
- return 0;
- }
- static void mmc_blk_remove_debugfs(struct mmc_card *card,
- struct mmc_blk_data *md)
- {
- }
- #endif /* CONFIG_DEBUG_FS */
- static int mmc_blk_probe(struct mmc_card *card)
- {
- struct mmc_blk_data *md, *part_md;
- char cap_str[10];
- /*
- * Check that the card supports the command class(es) we need.
- */
- if (!(card->csd.cmdclass & CCC_BLOCK_READ))
- return -ENODEV;
- mmc_fixup_device(card, mmc_blk_fixups);
- card->complete_wq = alloc_workqueue("mmc_complete",
- WQ_MEM_RECLAIM | WQ_HIGHPRI, 0);
- if (unlikely(!card->complete_wq)) {
- pr_err("Failed to create mmc completion workqueue");
- return -ENOMEM;
- }
- md = mmc_blk_alloc(card);
- if (IS_ERR(md))
- return PTR_ERR(md);
- string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
- cap_str, sizeof(cap_str));
- pr_info("%s: %s %s %s %s\n",
- md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
- cap_str, md->read_only ? "(ro)" : "");
- if (mmc_blk_alloc_parts(card, md))
- goto out;
- dev_set_drvdata(&card->dev, md);
- if (mmc_add_disk(md))
- goto out;
- list_for_each_entry(part_md, &md->part, part) {
- if (mmc_add_disk(part_md))
- goto out;
- }
- /* Add two debugfs entries */
- mmc_blk_add_debugfs(card, md);
- pm_runtime_set_autosuspend_delay(&card->dev, 3000);
- pm_runtime_use_autosuspend(&card->dev);
- /*
- * Don't enable runtime PM for SD-combo cards here. Leave that
- * decision to be taken during the SDIO init sequence instead.
- */
- if (card->type != MMC_TYPE_SD_COMBO) {
- pm_runtime_set_active(&card->dev);
- pm_runtime_enable(&card->dev);
- }
- return 0;
- out:
- mmc_blk_remove_parts(card, md);
- mmc_blk_remove_req(md);
- return 0;
- }
- static void mmc_blk_remove(struct mmc_card *card)
- {
- struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
- mmc_blk_remove_debugfs(card, md);
- mmc_blk_remove_parts(card, md);
- pm_runtime_get_sync(&card->dev);
- if (md->part_curr != md->part_type) {
- mmc_claim_host(card->host);
- mmc_blk_part_switch(card, md->part_type);
- mmc_release_host(card->host);
- }
- if (card->type != MMC_TYPE_SD_COMBO)
- pm_runtime_disable(&card->dev);
- pm_runtime_put_noidle(&card->dev);
- mmc_blk_remove_req(md);
- dev_set_drvdata(&card->dev, NULL);
- destroy_workqueue(card->complete_wq);
- }
- static int _mmc_blk_suspend(struct mmc_card *card)
- {
- struct mmc_blk_data *part_md;
- struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
- if (md) {
- mmc_queue_suspend(&md->queue);
- list_for_each_entry(part_md, &md->part, part) {
- mmc_queue_suspend(&part_md->queue);
- }
- }
- return 0;
- }
- static void mmc_blk_shutdown(struct mmc_card *card)
- {
- _mmc_blk_suspend(card);
- }
- #ifdef CONFIG_PM_SLEEP
- static int mmc_blk_suspend(struct device *dev)
- {
- struct mmc_card *card = mmc_dev_to_card(dev);
- return _mmc_blk_suspend(card);
- }
- static int mmc_blk_resume(struct device *dev)
- {
- struct mmc_blk_data *part_md;
- struct mmc_blk_data *md = dev_get_drvdata(dev);
- if (md) {
- /*
- * Resume involves the card going into idle state,
- * so current partition is always the main one.
- */
- md->part_curr = md->part_type;
- mmc_queue_resume(&md->queue);
- list_for_each_entry(part_md, &md->part, part) {
- mmc_queue_resume(&part_md->queue);
- }
- }
- return 0;
- }
- #endif
- static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
- static struct mmc_driver mmc_driver = {
- .drv = {
- .name = "mmcblk",
- .pm = &mmc_blk_pm_ops,
- },
- .probe = mmc_blk_probe,
- .remove = mmc_blk_remove,
- .shutdown = mmc_blk_shutdown,
- };
- static int __init mmc_blk_init(void)
- {
- int res;
- res = bus_register(&mmc_rpmb_bus_type);
- if (res < 0) {
- pr_err("mmcblk: could not register RPMB bus type\n");
- return res;
- }
- res = alloc_chrdev_region(&mmc_rpmb_devt, 0, MAX_DEVICES, "rpmb");
- if (res < 0) {
- pr_err("mmcblk: failed to allocate rpmb chrdev region\n");
- goto out_bus_unreg;
- }
- if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
- pr_info("mmcblk: using %d minors per device\n", perdev_minors);
- max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
- res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
- if (res)
- goto out_chrdev_unreg;
- res = mmc_register_driver(&mmc_driver);
- if (res)
- goto out_blkdev_unreg;
- return 0;
- out_blkdev_unreg:
- unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
- out_chrdev_unreg:
- unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES);
- out_bus_unreg:
- bus_unregister(&mmc_rpmb_bus_type);
- return res;
- }
- static void __exit mmc_blk_exit(void)
- {
- mmc_unregister_driver(&mmc_driver);
- unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
- unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES);
- bus_unregister(&mmc_rpmb_bus_type);
- }
- module_init(mmc_blk_init);
- module_exit(mmc_blk_exit);
- MODULE_LICENSE("GPL");
- MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");
|