diff options
| -rw-r--r-- | drivers/s390/block/dasd.c | 51 | ||||
| -rw-r--r-- | drivers/s390/block/dasd_devmap.c | 80 | ||||
| -rw-r--r-- | drivers/s390/block/dasd_eckd.c | 140 | ||||
| -rw-r--r-- | drivers/s390/block/dasd_eckd.h | 16 | ||||
| -rw-r--r-- | drivers/s390/block/dasd_fba.c | 20 | ||||
| -rw-r--r-- | drivers/s390/block/dasd_int.h | 2 | ||||
| -rw-r--r-- | include/asm-s390/dasd.h | 8 |
7 files changed, 227 insertions, 90 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index 7e9978a..bafcd2f 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -1855,15 +1855,34 @@ dasd_generic_probe (struct ccw_device *cdev, { int ret; + ret = ccw_device_set_options(cdev, CCWDEV_DO_PATHGROUP); + if (ret) { + printk(KERN_WARNING + "dasd_generic_probe: could not set ccw-device options " + "for %s\n", cdev->dev.bus_id); + return ret; + } ret = dasd_add_sysfs_files(cdev); if (ret) { printk(KERN_WARNING "dasd_generic_probe: could not add sysfs entries " "for %s\n", cdev->dev.bus_id); - } else { - cdev->handler = &dasd_int_handler; + return ret; } + cdev->handler = &dasd_int_handler; + /* + * Automatically online either all dasd devices (dasd_autodetect) + * or all devices specified with dasd= parameters during + * initial probe. + */ + if ((dasd_get_feature(cdev, DASD_FEATURE_INITIAL_ONLINE) > 0 ) || + (dasd_autodetect && dasd_busid_known(cdev->dev.bus_id) != 0)) + ret = ccw_device_set_online(cdev); + if (ret) + printk(KERN_WARNING + "dasd_generic_probe: could not initially online " + "ccw-device %s\n", cdev->dev.bus_id); return ret; } @@ -1911,6 +1930,8 @@ dasd_generic_set_online (struct ccw_device *cdev, struct dasd_device *device; int rc; + /* first online clears initial online feature flag */ + dasd_set_feature(cdev, DASD_FEATURE_INITIAL_ONLINE, 0); device = dasd_create_device(cdev); if (IS_ERR(device)) return PTR_ERR(device); @@ -2065,31 +2086,6 @@ dasd_generic_notify(struct ccw_device *cdev, int event) return ret; } -/* - * Automatically online either all dasd devices (dasd_autodetect) or - * all devices specified with dasd= parameters. - */ -static int -__dasd_auto_online(struct device *dev, void *data) -{ - struct ccw_device *cdev; - - cdev = to_ccwdev(dev); - if (dasd_autodetect || dasd_busid_known(cdev->dev.bus_id) == 0) - ccw_device_set_online(cdev); - return 0; -} - -void -dasd_generic_auto_online (struct ccw_driver *dasd_discipline_driver) -{ - struct device_driver *drv; - - drv = get_driver(&dasd_discipline_driver->driver); - driver_for_each_device(drv, NULL, NULL, __dasd_auto_online); - put_driver(drv); -} - static int __init dasd_init(void) @@ -2170,5 +2166,4 @@ EXPORT_SYMBOL_GPL(dasd_generic_remove); EXPORT_SYMBOL_GPL(dasd_generic_notify); EXPORT_SYMBOL_GPL(dasd_generic_set_online); EXPORT_SYMBOL_GPL(dasd_generic_set_offline); -EXPORT_SYMBOL_GPL(dasd_generic_auto_online); diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c index 672e503..9e9ae71 100644 --- a/drivers/s390/block/dasd_devmap.c +++ b/drivers/s390/block/dasd_devmap.c @@ -27,7 +27,7 @@ #include "dasd_int.h" kmem_cache_t *dasd_page_cache; -EXPORT_SYMBOL(dasd_page_cache); +EXPORT_SYMBOL_GPL(dasd_page_cache); /* * dasd_devmap_t is used to store the features and the relation @@ -49,6 +49,20 @@ struct dasd_devmap { }; /* + * dasd_servermap is used to store the server_id of all storage servers + * accessed by DASD device driver. + */ +struct dasd_servermap { + struct list_head list; + struct server_id { + char vendor[4]; + char serial[15]; + } sid; +}; + +static struct list_head dasd_serverlist; + +/* * Parameter parsing functions for dasd= parameter. The syntax is: * <devno> : (0x)?[0-9a-fA-F]+ * <busid> : [0-0a-f]\.[0-9a-f]\.(0x)?[0-9a-fA-F]+ @@ -64,6 +78,8 @@ struct dasd_devmap { int dasd_probeonly = 0; /* is true, when probeonly mode is active */ int dasd_autodetect = 0; /* is true, when autodetection is active */ +int dasd_nopav = 0; /* is true, when PAV is disabled */ +EXPORT_SYMBOL_GPL(dasd_nopav); /* * char *dasd[] is intended to hold the ranges supplied by the dasd= statement @@ -228,19 +244,24 @@ dasd_parse_keyword( char *parsestring ) { length = strlen(parsestring); residual_str = parsestring + length; } - if (strncmp ("autodetect", parsestring, length) == 0) { + if (strncmp("autodetect", parsestring, length) == 0) { dasd_autodetect = 1; MESSAGE (KERN_INFO, "%s", "turning to autodetection mode"); return residual_str; } - if (strncmp ("probeonly", parsestring, length) == 0) { + if (strncmp("probeonly", parsestring, length) == 0) { dasd_probeonly = 1; MESSAGE(KERN_INFO, "%s", "turning to probeonly mode"); return residual_str; } - if (strncmp ("fixedbuffers", parsestring, length) == 0) { + if (strncmp("nopav", parsestring, length) == 0) { + dasd_nopav = 1; + MESSAGE(KERN_INFO, "%s", "disable PAV mode"); + return residual_str; + } + if (strncmp("fixedbuffers", parsestring, length) == 0) { if (dasd_page_cache) return residual_str; dasd_page_cache = @@ -294,6 +315,8 @@ dasd_parse_range( char *parsestring ) { features = dasd_feature_list(str, &str); if (features < 0) return ERR_PTR(-EINVAL); + /* each device in dasd= parameter should be set initially online */ + features |= DASD_FEATURE_INITIAL_ONLINE; while (from <= to) { sprintf(bus_id, "%01x.%01x.%04x", from_id0, from_id1, from++); @@ -836,6 +859,38 @@ static struct attribute_group dasd_attr_group = { .attrs = dasd_attrs, }; +/* + * Check if the related storage server is already contained in the + * dasd_serverlist. If server is not contained, create new entry. + * Return 0 if server was already in serverlist, + * 1 if the server was added successfully + * <0 in case of error. + */ +static int +dasd_add_server(struct dasd_uid *uid) +{ + struct dasd_servermap *new, *tmp; + + /* check if server is already contained */ + list_for_each_entry(tmp, &dasd_serverlist, list) + // normale cmp? + if (strncmp(tmp->sid.vendor, uid->vendor, + sizeof(tmp->sid.vendor)) == 0 + && strncmp(tmp->sid.serial, uid->serial, + sizeof(tmp->sid.serial)) == 0) + return 0; + + new = (struct dasd_servermap *) + kzalloc(sizeof(struct dasd_servermap), GFP_KERNEL); + if (!new) + return -ENOMEM; + + strncpy(new->sid.vendor, uid->vendor, sizeof(new->sid.vendor)); + strncpy(new->sid.serial, uid->serial, sizeof(new->sid.serial)); + list_add(&new->list, &dasd_serverlist); + return 1; +} + /* * Return copy of the device unique identifier. @@ -856,21 +911,26 @@ dasd_get_uid(struct ccw_device *cdev, struct dasd_uid *uid) /* * Register the given device unique identifier into devmap struct. + * Return 0 if server was already in serverlist, + * 1 if the server was added successful + * <0 in case of error. */ int dasd_set_uid(struct ccw_device *cdev, struct dasd_uid *uid) { struct dasd_devmap *devmap; + int rc; devmap = dasd_find_busid(cdev->dev.bus_id); if (IS_ERR(devmap)) return PTR_ERR(devmap); spin_lock(&dasd_devmap_lock); devmap->uid = *uid; + rc = dasd_add_server(uid); spin_unlock(&dasd_devmap_lock); - return 0; + return rc; } -EXPORT_SYMBOL(dasd_set_uid); +EXPORT_SYMBOL_GPL(dasd_set_uid); /* * Return value of the specified feature. @@ -882,7 +942,7 @@ dasd_get_feature(struct ccw_device *cdev, int feature) devmap = dasd_find_busid(cdev->dev.bus_id); if (IS_ERR(devmap)) - return (int) PTR_ERR(devmap); + return PTR_ERR(devmap); return ((devmap->features & feature) != 0); } @@ -898,7 +958,7 @@ dasd_set_feature(struct ccw_device *cdev, int feature, int flag) devmap = dasd_find_busid(cdev->dev.bus_id); if (IS_ERR(devmap)) - return (int) PTR_ERR(devmap); + return PTR_ERR(devmap); spin_lock(&dasd_devmap_lock); if (flag) @@ -934,8 +994,10 @@ dasd_devmap_init(void) dasd_max_devindex = 0; for (i = 0; i < 256; i++) INIT_LIST_HEAD(&dasd_hashlists[i]); - return 0; + /* Initialize servermap structure. */ + INIT_LIST_HEAD(&dasd_serverlist); + return 0; } void diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index 1225777..0dfab30 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -24,6 +24,7 @@ #include <asm/io.h> #include <asm/todclk.h> #include <asm/uaccess.h> +#include <asm/cio.h> #include <asm/ccwdev.h> #include "dasd_int.h" @@ -89,17 +90,22 @@ dasd_eckd_probe (struct ccw_device *cdev) { int ret; - ret = dasd_generic_probe (cdev, &dasd_eckd_discipline); - if (ret) + /* set ECKD specific ccw-device options */ + ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE); + if (ret) { + printk(KERN_WARNING + "dasd_eckd_probe: could not set ccw-device options " + "for %s\n", cdev->dev.bus_id); return ret; - ccw_device_set_options(cdev, CCWDEV_DO_PATHGROUP | CCWDEV_ALLOW_FORCE); - return 0; + } + ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); + return ret; } static int dasd_eckd_set_online(struct ccw_device *cdev) { - return dasd_generic_set_online (cdev, &dasd_eckd_discipline); + return dasd_generic_set_online(cdev, &dasd_eckd_discipline); } static struct ccw_driver dasd_eckd_driver = { @@ -541,6 +547,86 @@ dasd_eckd_read_conf(struct dasd_device *device) } /* + * Build CP for Perform Subsystem Function - SSC. + */ +struct dasd_ccw_req * +dasd_eckd_build_psf_ssc(struct dasd_device *device) +{ + struct dasd_ccw_req *cqr; + struct dasd_psf_ssc_data *psf_ssc_data; + struct ccw1 *ccw; + + cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ , + sizeof(struct dasd_psf_ssc_data), + device); + + if (IS_ERR(cqr)) { + DEV_MESSAGE(KERN_WARNING, device, "%s", + "Could not allocate PSF-SSC request"); + return cqr; + } + psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; + psf_ssc_data->order = PSF_ORDER_SSC; + psf_ssc_data->suborder = 0x08; + + ccw = cqr->cpaddr; + ccw->cmd_code = DASD_ECKD_CCW_PSF; + ccw->cda = (__u32)(addr_t)psf_ssc_data; + ccw->count = 66; + + cqr->device = device; + cqr->expires = 10*HZ; + cqr->buildclk = get_clock(); + cqr->status = DASD_CQR_FILLED; + return cqr; +} + +/* + * Perform Subsystem Function. + * It is necessary to trigger CIO for channel revalidation since this + * call might change behaviour of DASD devices. + */ +static int +dasd_eckd_psf_ssc(struct dasd_device *device) +{ + struct dasd_ccw_req *cqr; + int rc; + + cqr = dasd_eckd_build_psf_ssc(device); + if (IS_ERR(cqr)) + return PTR_ERR(cqr); + + rc = dasd_sleep_on(cqr); + if (!rc) + /* trigger CIO to reprobe devices */ + css_schedule_reprobe(); + dasd_sfree_request(cqr, cqr->device); + return rc; +} + +/* + * Valide storage server of current device. + */ +static int +dasd_eckd_validate_server(struct dasd_device *device) +{ + int rc; + + /* Currently PAV is the only reason to 'validate' server on LPAR */ + if (dasd_nopav || MACHINE_IS_VM) + return 0; + + rc = dasd_eckd_psf_ssc(device); + if (rc) + /* may be requested feature is not available on server, + * therefore just report error and go ahead */ + DEV_MESSAGE(KERN_INFO, device, + "Perform Subsystem Function returned rc=%d", rc); + /* RE-Read Configuration Data */ + return dasd_eckd_read_conf(device); +} + +/* * Check device characteristics. * If the device is accessible using ECKD discipline, the device is enabled. */ @@ -570,16 +656,29 @@ dasd_eckd_check_characteristics(struct dasd_device *device) private->attrib.operation = DASD_NORMAL_CACHE; private->attrib.nr_cyl = 0; + /* Read Configuration Data */ + rc = dasd_eckd_read_conf(device); + if (rc) + return rc; + + /* Generate device unique id and register in devmap */ + rc = dasd_eckd_generate_uid(device, &uid); + if (rc) + return rc; + rc = dasd_set_uid(device->cdev, &uid); + if (rc == 1) /* new server found */ + rc = dasd_eckd_validate_server(device); + if (rc) + return rc; + /* Read Device Characteristics */ rdc_data = (void *) &(private->rdc_data); memset(rdc_data, 0, sizeof(rdc_data)); rc = read_dev_chars(device->cdev, &rdc_data, 64); - if (rc) { + if (rc) DEV_MESSAGE(KERN_WARNING, device, - "Read device characteristics returned error %d", - rc); - return rc; - } + "Read device characteristics returned " + "rc=%d", rc); DEV_MESSAGE(KERN_INFO, device, "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d", @@ -590,19 +689,6 @@ dasd_eckd_check_characteristics(struct dasd_device *device) private->rdc_data.no_cyl, private->rdc_data.trk_per_cyl, private->rdc_data.sec_per_trk); - - /* Read Configuration Data */ - rc = dasd_eckd_read_conf (device); - if (rc) - return rc; - - /* Generate device unique id and register in devmap */ - rc = dasd_eckd_generate_uid(device, &uid); - if (rc) - return rc; - - rc = dasd_set_uid(device->cdev, &uid); - return rc; } @@ -1687,14 +1773,8 @@ static struct dasd_discipline dasd_eckd_discipline = { static int __init dasd_eckd_init(void) { - int ret; - ASCEBC(dasd_eckd_discipline.ebcname, 4); - - ret = ccw_driver_register(&dasd_eckd_driver); - if (!ret) - dasd_generic_auto_online(&dasd_eckd_driver); - return ret; + return ccw_driver_register(&dasd_eckd_driver); } static void __exit diff --git a/drivers/s390/block/dasd_eckd.h b/drivers/s390/block/dasd_eckd.h index 9d91c86..712ff16 100644 --- a/drivers/s390/block/dasd_eckd.h +++ b/drivers/s390/block/dasd_eckd.h @@ -41,9 +41,10 @@ #define DASD_ECKD_CCW_RESERVE 0xB4 /* - *Perform Subsystem Function / Sub-Orders + * Perform Subsystem Function / Sub-Orders */ -#define PSF_ORDER_PRSSD 0x18 +#define PSF_ORDER_PRSSD 0x18 +#define PSF_ORDER_SSC 0x1D /***************************************************************************** * SECTION: Type Definitions @@ -353,4 +354,15 @@ struct dasd_psf_prssd_data { unsigned char varies[9]; } __attribute__ ((packed)); +/* + * Perform Subsystem Function - Set Subsystem Characteristics + */ +struct dasd_psf_ssc_data { + unsigned char order; + unsigned char flags; + unsigned char cu_type[4]; + unsigned char suborder; + unsigned char reserved[59]; +} __attribute__((packed)); + #endif /* DASD_ECKD_H */ diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c index d331c6e..bb7755b 100644 --- a/drivers/s390/block/dasd_fba.c +++ b/drivers/s390/block/dasd_fba.c @@ -56,19 +56,13 @@ static struct ccw_driver dasd_fba_driver; /* see below */ static int dasd_fba_probe(struct ccw_device *cdev) { - int ret; - - ret = dasd_generic_probe (cdev, &dasd_fba_discipline); - if (ret) - return ret; - ccw_device_set_options(cdev, CCWDEV_DO_PATHGROUP); - return 0; + return dasd_generic_probe(cdev, &dasd_fba_discipline); } static int dasd_fba_set_online(struct ccw_device *cdev) { - return dasd_generic_set_online (cdev, &dasd_fba_discipline); + return dasd_generic_set_online(cdev, &dasd_fba_discipline); } static struct ccw_driver dasd_fba_driver = { @@ -569,16 +563,8 @@ static struct dasd_discipline dasd_fba_discipline = { static int __init dasd_fba_init(void) { - int ret; - ASCEBC(dasd_fba_discipline.ebcname, 4); - - ret = ccw_driver_register(&dasd_fba_driver); - if (ret) - return ret; - - dasd_generic_auto_online(&dasd_fba_driver); - return 0; + return ccw_driver_register(&dasd_fba_driver); } static void __exit diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h index 2c1fa85..03a83ef 100644 --- a/drivers/s390/block/dasd_int.h +++ b/drivers/s390/block/dasd_int.h @@ -513,12 +513,12 @@ void dasd_generic_remove (struct ccw_device *cdev); int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); int dasd_generic_set_offline (struct ccw_device *cdev); int dasd_generic_notify(struct ccw_device *, int); -void dasd_generic_auto_online (struct ccw_driver *); /* externals in dasd_devmap.c */ extern int dasd_max_devindex; extern int dasd_probeonly; extern int dasd_autodetect; +extern int dasd_nopav; int dasd_devmap_init(void); void dasd_devmap_exit(void); diff --git a/include/asm-s390/dasd.h b/include/asm-s390/dasd.h index 1630c26..c042f95 100644 --- a/include/asm-s390/dasd.h +++ b/include/asm-s390/dasd.h @@ -68,10 +68,12 @@ typedef struct dasd_information2_t { * 0x00: default features * 0x01: readonly (ro) * 0x02: use diag discipline (diag) + * 0x04: set the device initially online (internal use only) */ -#define DASD_FEATURE_DEFAULT 0 -#define DASD_FEATURE_READONLY 1 -#define DASD_FEATURE_USEDIAG 2 +#define DASD_FEATURE_DEFAULT 0x00 +#define DASD_FEATURE_READONLY 0x01 +#define DASD_FEATURE_USEDIAG 0x02 +#define DASD_FEATURE_INITIAL_ONLINE 0x04 #define DASD_PARTN_BITS 2 |