^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright IBM Corp. 1999, 2010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Author(s): Cornelia Huck (cornelia.huck@de.ibm.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Arnd Bergmann (arndb@de.ibm.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/bug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/chpid.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/sclp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <asm/crw.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include "cio.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "css.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include "ioasm.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include "cio_debug.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include "chp.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define to_channelpath(device) container_of(device, struct channel_path, dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define CHP_INFO_UPDATE_INTERVAL 1*HZ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) enum cfg_task_t {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) cfg_none,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) cfg_configure,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) cfg_deconfigure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) /* Map for pending configure tasks. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static enum cfg_task_t chp_cfg_task[__MAX_CSSID + 1][__MAX_CHPID + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static DEFINE_SPINLOCK(cfg_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /* Map for channel-path status. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static struct sclp_chp_info chp_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static DEFINE_MUTEX(info_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /* Time after which channel-path status may be outdated. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static unsigned long chp_info_expires;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static struct work_struct cfg_work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /* Wait queue for configure completion events. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static wait_queue_head_t cfg_wait_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /* Set vary state for given chpid. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static void set_chp_logically_online(struct chp_id chpid, int onoff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) chpid_to_chp(chpid)->state = onoff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) /* On success return 0 if channel-path is varied offline, 1 if it is varied
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * online. Return -ENODEV if channel-path is not registered. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) int chp_get_status(struct chp_id chpid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return (chpid_to_chp(chpid) ? chpid_to_chp(chpid)->state : -ENODEV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * chp_get_sch_opm - return opm for subchannel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * @sch: subchannel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * Calculate and return the operational path mask (opm) based on the chpids
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * used by the subchannel and the status of the associated channel-paths.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) u8 chp_get_sch_opm(struct subchannel *sch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct chp_id chpid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) int opm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) opm = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) chp_id_init(&chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) for (i = 0; i < 8; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) opm <<= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) chpid.id = sch->schib.pmcw.chpid[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (chp_get_status(chpid) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) opm |= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return opm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) EXPORT_SYMBOL_GPL(chp_get_sch_opm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * chp_is_registered - check if a channel-path is registered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * @chpid: channel-path ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) * Return non-zero if a channel-path with the given chpid is registered,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * zero otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) int chp_is_registered(struct chp_id chpid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return chpid_to_chp(chpid) != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * Function: s390_vary_chpid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * Varies the specified chpid online or offline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static int s390_vary_chpid(struct chp_id chpid, int on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) char dbf_text[15];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) sprintf(dbf_text, on?"varyon%x.%02x":"varyoff%x.%02x", chpid.cssid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) chpid.id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) CIO_TRACE_EVENT(2, dbf_text);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) status = chp_get_status(chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (!on && !status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) set_chp_logically_online(chpid, on);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) chsc_chp_vary(chpid, on);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * Channel measurement related functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static ssize_t chp_measurement_chars_read(struct file *filp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct bin_attribute *bin_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) char *buf, loff_t off, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) struct channel_path *chp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) struct device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) device = kobj_to_dev(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) chp = to_channelpath(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (chp->cmg == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) return memory_read_from_buffer(buf, count, &off, &chp->cmg_chars,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) sizeof(chp->cmg_chars));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static const struct bin_attribute chp_measurement_chars_attr = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) .attr = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) .name = "measurement_chars",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) .mode = S_IRUSR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) .size = sizeof(struct cmg_chars),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) .read = chp_measurement_chars_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static void chp_measurement_copy_block(struct cmg_entry *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) struct channel_subsystem *css,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) struct chp_id chpid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) void *area;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) struct cmg_entry *entry, reference_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) int idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if (chpid.id < 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) area = css->cub_addr1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) idx = chpid.id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) area = css->cub_addr2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) idx = chpid.id - 128;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) entry = area + (idx * sizeof(struct cmg_entry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) memcpy(buf, entry, sizeof(*entry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) memcpy(&reference_buf, entry, sizeof(*entry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) } while (reference_buf.values[0] != buf->values[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static ssize_t chp_measurement_read(struct file *filp, struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) struct bin_attribute *bin_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) char *buf, loff_t off, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct channel_path *chp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) struct channel_subsystem *css;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) struct device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) unsigned int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) device = kobj_to_dev(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) chp = to_channelpath(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) css = to_css(chp->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) size = sizeof(struct cmg_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) /* Only allow single reads. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (off || count < size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) chp_measurement_copy_block((struct cmg_entry *)buf, css, chp->chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) count = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) static const struct bin_attribute chp_measurement_attr = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) .attr = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) .name = "measurement",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) .mode = S_IRUSR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) .size = sizeof(struct cmg_entry),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) .read = chp_measurement_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) void chp_remove_cmg_attr(struct channel_path *chp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) device_remove_bin_file(&chp->dev, &chp_measurement_chars_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) device_remove_bin_file(&chp->dev, &chp_measurement_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) int chp_add_cmg_attr(struct channel_path *chp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) ret = device_create_bin_file(&chp->dev, &chp_measurement_chars_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) ret = device_create_bin_file(&chp->dev, &chp_measurement_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) device_remove_bin_file(&chp->dev, &chp_measurement_chars_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) * Files for the channel path entries.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) static ssize_t chp_status_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) struct channel_path *chp = to_channelpath(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) mutex_lock(&chp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) status = chp->state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) mutex_unlock(&chp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) return status ? sprintf(buf, "online\n") : sprintf(buf, "offline\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) static ssize_t chp_status_write(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) struct channel_path *cp = to_channelpath(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) char cmd[10];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) int num_args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) num_args = sscanf(buf, "%5s", cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (!num_args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) /* Wait until previous actions have settled. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) css_wait_for_slow_path();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) if (!strncasecmp(cmd, "on", 2) || !strcmp(cmd, "1")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) mutex_lock(&cp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) error = s390_vary_chpid(cp->chpid, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) mutex_unlock(&cp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) } else if (!strncasecmp(cmd, "off", 3) || !strcmp(cmd, "0")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) mutex_lock(&cp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) error = s390_vary_chpid(cp->chpid, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) mutex_unlock(&cp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) error = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) return error < 0 ? error : count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) static DEVICE_ATTR(status, 0644, chp_status_show, chp_status_write);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) static ssize_t chp_configure_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) struct channel_path *cp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) cp = to_channelpath(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) status = chp_info_get_status(cp->chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) return snprintf(buf, PAGE_SIZE, "%d\n", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) static int cfg_wait_idle(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) static ssize_t chp_configure_write(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) struct channel_path *cp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) char delim;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) if (sscanf(buf, "%d %c", &val, &delim) != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) if (val != 0 && val != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) cp = to_channelpath(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) chp_cfg_schedule(cp->chpid, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) cfg_wait_idle();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) static DEVICE_ATTR(configure, 0644, chp_configure_show, chp_configure_write);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) static ssize_t chp_type_show(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) struct channel_path *chp = to_channelpath(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) u8 type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) mutex_lock(&chp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) type = chp->desc.desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) mutex_unlock(&chp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) return sprintf(buf, "%x\n", type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) static DEVICE_ATTR(type, 0444, chp_type_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) static ssize_t chp_cmg_show(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) struct channel_path *chp = to_channelpath(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) if (!chp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (chp->cmg == -1) /* channel measurements not available */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) return sprintf(buf, "unknown\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) return sprintf(buf, "%x\n", chp->cmg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) static DEVICE_ATTR(cmg, 0444, chp_cmg_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) static ssize_t chp_shared_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) struct channel_path *chp = to_channelpath(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) if (!chp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) if (chp->shared == -1) /* channel measurements not available */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) return sprintf(buf, "unknown\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) return sprintf(buf, "%x\n", chp->shared);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) static DEVICE_ATTR(shared, 0444, chp_shared_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) static ssize_t chp_chid_show(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) struct channel_path *chp = to_channelpath(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) ssize_t rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) mutex_lock(&chp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) if (chp->desc_fmt1.flags & 0x10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) rc = sprintf(buf, "%04x\n", chp->desc_fmt1.chid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) mutex_unlock(&chp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) static DEVICE_ATTR(chid, 0444, chp_chid_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) static ssize_t chp_chid_external_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) struct channel_path *chp = to_channelpath(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) ssize_t rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) mutex_lock(&chp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) if (chp->desc_fmt1.flags & 0x10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) rc = sprintf(buf, "%x\n", chp->desc_fmt1.flags & 0x8 ? 1 : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) mutex_unlock(&chp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) static DEVICE_ATTR(chid_external, 0444, chp_chid_external_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) static ssize_t util_string_read(struct file *filp, struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) struct bin_attribute *attr, char *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) loff_t off, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) struct channel_path *chp = to_channelpath(kobj_to_dev(kobj));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) ssize_t rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) mutex_lock(&chp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) rc = memory_read_from_buffer(buf, count, &off, chp->desc_fmt3.util_str,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) sizeof(chp->desc_fmt3.util_str));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) mutex_unlock(&chp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) static BIN_ATTR_RO(util_string,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) sizeof(((struct channel_path_desc_fmt3 *)0)->util_str));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) static struct bin_attribute *chp_bin_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) &bin_attr_util_string,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) static struct attribute *chp_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) &dev_attr_status.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) &dev_attr_configure.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) &dev_attr_type.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) &dev_attr_cmg.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) &dev_attr_shared.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) &dev_attr_chid.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) &dev_attr_chid_external.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) static struct attribute_group chp_attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) .attrs = chp_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) .bin_attrs = chp_bin_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) static const struct attribute_group *chp_attr_groups[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) &chp_attr_group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) static void chp_release(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) struct channel_path *cp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) cp = to_channelpath(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) kfree(cp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) * chp_update_desc - update channel-path description
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) * @chp: channel-path
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) * Update the channel-path description of the specified channel-path
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) * including channel measurement related information.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) * Return zero on success, non-zero otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) int chp_update_desc(struct channel_path *chp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) rc = chsc_determine_fmt0_channel_path_desc(chp->chpid, &chp->desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) * Fetching the following data is optional. Not all machines or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) * hypervisors implement the required chsc commands.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) chsc_determine_fmt1_channel_path_desc(chp->chpid, &chp->desc_fmt1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) chsc_determine_fmt3_channel_path_desc(chp->chpid, &chp->desc_fmt3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) chsc_get_channel_measurement_chars(chp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) * chp_new - register a new channel-path
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) * @chpid: channel-path ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) * Create and register data structure representing new channel-path. Return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) * zero on success, non-zero otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) int chp_new(struct chp_id chpid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) struct channel_subsystem *css = css_by_id(chpid.cssid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) struct channel_path *chp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) mutex_lock(&css->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) if (chp_is_registered(chpid))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) chp = kzalloc(sizeof(struct channel_path), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) if (!chp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) /* fill in status, etc. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) chp->chpid = chpid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) chp->state = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) chp->dev.parent = &css->device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) chp->dev.groups = chp_attr_groups;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) chp->dev.release = chp_release;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) mutex_init(&chp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) /* Obtain channel path description and fill it in. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) ret = chp_update_desc(chp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) goto out_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) if ((chp->desc.flags & 0x80) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) ret = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) goto out_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) dev_set_name(&chp->dev, "chp%x.%02x", chpid.cssid, chpid.id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) /* make it known to the system */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) ret = device_register(&chp->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) CIO_MSG_EVENT(0, "Could not register chp%x.%02x: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) chpid.cssid, chpid.id, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) put_device(&chp->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) if (css->cm_enabled) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) ret = chp_add_cmg_attr(chp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) device_unregister(&chp->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) css->chps[chpid.id] = chp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) out_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) kfree(chp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) mutex_unlock(&css->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) * chp_get_chp_desc - return newly allocated channel-path description
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) * @chpid: channel-path ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) * On success return a newly allocated copy of the channel-path description
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) * data associated with the given channel-path ID. Return %NULL on error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) struct channel_path_desc_fmt0 *chp_get_chp_desc(struct chp_id chpid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) struct channel_path *chp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) struct channel_path_desc_fmt0 *desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) chp = chpid_to_chp(chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) if (!chp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) desc = kmalloc(sizeof(*desc), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) if (!desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) mutex_lock(&chp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) memcpy(desc, &chp->desc, sizeof(*desc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) mutex_unlock(&chp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) return desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) * chp_process_crw - process channel-path status change
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) * @crw0: channel report-word to handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) * @crw1: second channel-report word (always NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) * @overflow: crw overflow indication
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) * Handle channel-report-words indicating that the status of a channel-path
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) * has changed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) static void chp_process_crw(struct crw *crw0, struct crw *crw1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) int overflow)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) struct chp_id chpid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) if (overflow) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) css_schedule_eval_all();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) crw0->erc, crw0->rsid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) * Check for solicited machine checks. These are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) * created by reset channel path and need not be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) * handled here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) if (crw0->slct) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) CIO_CRW_EVENT(2, "solicited machine check for "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) "channel path %02X\n", crw0->rsid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) chp_id_init(&chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) chpid.id = crw0->rsid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) switch (crw0->erc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) case CRW_ERC_IPARM: /* Path has come. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) case CRW_ERC_INIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) chp_new(chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) chsc_chp_online(chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) case CRW_ERC_PERRI: /* Path has gone. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) case CRW_ERC_PERRN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) chsc_chp_offline(chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) CIO_CRW_EVENT(2, "Don't know how to handle erc=%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) crw0->erc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) int chp_ssd_get_mask(struct chsc_ssd_info *ssd, struct chp_link *link)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) int mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) for (i = 0; i < 8; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) mask = 0x80 >> i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) if (!(ssd->path_mask & mask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) if (!chp_id_is_equal(&ssd->chpid[i], &link->chpid))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) if ((ssd->fla_valid_mask & mask) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) ((ssd->fla[i] & link->fla_mask) != link->fla))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) return mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) EXPORT_SYMBOL_GPL(chp_ssd_get_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) static inline int info_bit_num(struct chp_id id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) return id.id + id.cssid * (__MAX_CHPID + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) /* Force chp_info refresh on next call to info_validate(). */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) static void info_expire(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) mutex_lock(&info_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) chp_info_expires = jiffies - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) mutex_unlock(&info_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) /* Ensure that chp_info is up-to-date. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) static int info_update(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) mutex_lock(&info_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) if (time_after(jiffies, chp_info_expires)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) /* Data is too old, update. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) rc = sclp_chp_read_info(&chp_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) chp_info_expires = jiffies + CHP_INFO_UPDATE_INTERVAL ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) mutex_unlock(&info_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) * chp_info_get_status - retrieve configure status of a channel-path
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) * @chpid: channel-path ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) * On success, return 0 for standby, 1 for configured, 2 for reserved,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) * 3 for not recognized. Return negative error code on error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) int chp_info_get_status(struct chp_id chpid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) int bit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) rc = info_update();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) bit = info_bit_num(chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) mutex_lock(&info_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) if (!chp_test_bit(chp_info.recognized, bit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) rc = CHP_STATUS_NOT_RECOGNIZED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) else if (chp_test_bit(chp_info.configured, bit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) rc = CHP_STATUS_CONFIGURED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) else if (chp_test_bit(chp_info.standby, bit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) rc = CHP_STATUS_STANDBY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) rc = CHP_STATUS_RESERVED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) mutex_unlock(&info_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) /* Return configure task for chpid. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) static enum cfg_task_t cfg_get_task(struct chp_id chpid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) return chp_cfg_task[chpid.cssid][chpid.id];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) /* Set configure task for chpid. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) static void cfg_set_task(struct chp_id chpid, enum cfg_task_t cfg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) chp_cfg_task[chpid.cssid][chpid.id] = cfg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) /* Fetch the first configure task. Set chpid accordingly. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) static enum cfg_task_t chp_cfg_fetch_task(struct chp_id *chpid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) enum cfg_task_t t = cfg_none;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) chp_id_for_each(chpid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) t = cfg_get_task(*chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) if (t != cfg_none)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) return t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) /* Perform one configure/deconfigure request. Reschedule work function until
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) * last request. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) static void cfg_func(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) struct chp_id chpid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) enum cfg_task_t t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) spin_lock(&cfg_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) t = chp_cfg_fetch_task(&chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) spin_unlock(&cfg_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) switch (t) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) case cfg_configure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) rc = sclp_chp_configure(chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) CIO_MSG_EVENT(2, "chp: sclp_chp_configure(%x.%02x)="
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) "%d\n", chpid.cssid, chpid.id, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) info_expire();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) chsc_chp_online(chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) case cfg_deconfigure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) rc = sclp_chp_deconfigure(chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) CIO_MSG_EVENT(2, "chp: sclp_chp_deconfigure(%x.%02x)="
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) "%d\n", chpid.cssid, chpid.id, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) info_expire();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) chsc_chp_offline(chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) case cfg_none:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) /* Get updated information after last change. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) info_update();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) wake_up_interruptible(&cfg_wait_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) spin_lock(&cfg_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) if (t == cfg_get_task(chpid))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) cfg_set_task(chpid, cfg_none);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) spin_unlock(&cfg_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) schedule_work(&cfg_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) * chp_cfg_schedule - schedule chpid configuration request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) * @chpid: channel-path ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) * @configure: Non-zero for configure, zero for deconfigure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) * Schedule a channel-path configuration/deconfiguration request.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) void chp_cfg_schedule(struct chp_id chpid, int configure)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) CIO_MSG_EVENT(2, "chp_cfg_sched%x.%02x=%d\n", chpid.cssid, chpid.id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) configure);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) spin_lock(&cfg_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) cfg_set_task(chpid, configure ? cfg_configure : cfg_deconfigure);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) spin_unlock(&cfg_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) schedule_work(&cfg_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) * chp_cfg_cancel_deconfigure - cancel chpid deconfiguration request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) * @chpid: channel-path ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) * Cancel an active channel-path deconfiguration request if it has not yet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) * been performed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) void chp_cfg_cancel_deconfigure(struct chp_id chpid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) CIO_MSG_EVENT(2, "chp_cfg_cancel:%x.%02x\n", chpid.cssid, chpid.id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) spin_lock(&cfg_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) if (cfg_get_task(chpid) == cfg_deconfigure)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) cfg_set_task(chpid, cfg_none);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) spin_unlock(&cfg_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) static bool cfg_idle(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) struct chp_id chpid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) enum cfg_task_t t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) spin_lock(&cfg_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) t = chp_cfg_fetch_task(&chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) spin_unlock(&cfg_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) return t == cfg_none;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) static int cfg_wait_idle(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) if (wait_event_interruptible(cfg_wait_queue, cfg_idle()))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) return -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) static int __init chp_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) struct chp_id chpid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) int state, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) ret = crw_register_handler(CRW_RSC_CPATH, chp_process_crw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) INIT_WORK(&cfg_work, cfg_func);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) init_waitqueue_head(&cfg_wait_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) if (info_update())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) /* Register available channel-paths. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) chp_id_for_each(&chpid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) state = chp_info_get_status(chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) if (state == CHP_STATUS_CONFIGURED ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) state == CHP_STATUS_STANDBY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) chp_new(chpid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) subsys_initcall(chp_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags