*/
#include <linux/module.h>
+#include <linux/config.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/device.h>
ssd_area = page;
- ssd_area->request.length = 0x0010;
- ssd_area->request.code = 0x0004;
+ ssd_area->request = (struct chsc_header) {
+ .length = 0x0010,
+ .code = 0x0004,
+ };
ssd_area->ssid = sch->schid.ssid;
ssd_area->f_sch = sch->schid.sch_no;
/* Check for single path devices. */
if (sch->schib.pmcw.pim == 0x80)
goto out_unreg;
+ if (sch->vpm == mask)
+ goto out_unreg;
- if ((sch->schib.scsw.actl & SCSW_ACTL_DEVACT) &&
- (sch->schib.scsw.actl & SCSW_ACTL_SCHACT) &&
+ if ((sch->schib.scsw.actl & (SCSW_ACTL_CLEAR_PEND |
+ SCSW_ACTL_HALT_PEND |
+ SCSW_ACTL_START_PEND |
+ SCSW_ACTL_RESUME_PEND)) &&
(sch->schib.pmcw.lpum == mask)) {
+ int cc = cio_cancel(sch);
+
+ if (cc == -ENODEV)
+ goto out_unreg;
+
+ if (cc == -EINVAL) {
+ cc = cio_clear(sch);
+ if (cc == -ENODEV)
+ goto out_unreg;
+ /* Call handler. */
+ if (sch->driver && sch->driver->termination)
+ sch->driver->termination(&sch->dev);
+ goto out_unlock;
+ }
+ } else if ((sch->schib.scsw.actl & SCSW_ACTL_DEVACT) &&
+ (sch->schib.scsw.actl & SCSW_ACTL_SCHACT) &&
+ (sch->schib.pmcw.lpum == mask)) {
int cc;
cc = cio_clear(sch);
/* trigger path verification. */
if (sch->driver && sch->driver->verify)
sch->driver->verify(&sch->dev);
- else if (sch->vpm == mask)
- goto out_unreg;
out_unlock:
spin_unlock_irq(&sch->lock);
return 0;
struct device *dev;
memset(sei_area, 0, sizeof(*sei_area));
memset(&res_data, 0, sizeof(struct res_acc_data));
- sei_area->request.length = 0x0010;
- sei_area->request.code = 0x000e;
+ sei_area->request = (struct chsc_header) {
+ .length = 0x0010,
+ .code = 0x000e,
+ };
ccode = chsc(sei_area);
if (ccode > 0)
if (sch->schib.pmcw.chpid[i] == chp->id) {
if (stsch(sch->schid, &sch->schib) != 0) {
/* Endgame. */
- spin_unlock_irq(&sch->lock);
+ spin_unlock(&sch->lock);
return -ENXIO;
}
break;
}
if (i==8) {
- spin_unlock_irq(&sch->lock);
+ spin_unlock(&sch->lock);
return 0;
}
sch->lpm = ((sch->schib.pmcw.pim &
return 0;
}
-/*
- * Channel measurement related functions
- */
-static ssize_t
-chp_measurement_chars_read(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
-{
- struct channel_path *chp;
- unsigned int size;
-
- chp = to_channelpath(container_of(kobj, struct device, kobj));
- if (!chp->cmg_chars)
- return 0;
-
- size = sizeof(struct cmg_chars);
-
- if (off > size)
- return 0;
- if (off + count > size)
- count = size - off;
- memcpy(buf, chp->cmg_chars + off, count);
- return count;
-}
-
-static struct bin_attribute chp_measurement_chars_attr = {
- .attr = {
- .name = "measurement_chars",
- .mode = S_IRUSR,
- .owner = THIS_MODULE,
- },
- .size = sizeof(struct cmg_chars),
- .read = chp_measurement_chars_read,
-};
-
-static void
-chp_measurement_copy_block(struct cmg_entry *buf,
- struct channel_subsystem *css, int chpid)
-{
- void *area;
- struct cmg_entry *entry, reference_buf;
- int idx;
-
- if (chpid < 128) {
- area = css->cub_addr1;
- idx = chpid;
- } else {
- area = css->cub_addr2;
- idx = chpid - 128;
- }
- entry = area + (idx * sizeof(struct cmg_entry));
- do {
- memcpy(buf, entry, sizeof(*entry));
- memcpy(&reference_buf, entry, sizeof(*entry));
- } while (reference_buf.values[0] != buf->values[0]);
-}
-
-static ssize_t
-chp_measurement_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
-{
- struct channel_path *chp;
- struct channel_subsystem *css;
- unsigned int size;
-
- chp = to_channelpath(container_of(kobj, struct device, kobj));
- css = to_css(chp->dev.parent);
-
- size = sizeof(struct cmg_entry);
-
- /* Only allow single reads. */
- if (off || count < size)
- return 0;
- chp_measurement_copy_block((struct cmg_entry *)buf, css, chp->id);
- count = size;
- return count;
-}
-
-static struct bin_attribute chp_measurement_attr = {
- .attr = {
- .name = "measurement",
- .mode = S_IRUSR,
- .owner = THIS_MODULE,
- },
- .size = sizeof(struct cmg_entry),
- .read = chp_measurement_read,
-};
-
-static void
-chsc_remove_chp_cmg_attr(struct channel_path *chp)
-{
- sysfs_remove_bin_file(&chp->dev.kobj, &chp_measurement_chars_attr);
- sysfs_remove_bin_file(&chp->dev.kobj, &chp_measurement_attr);
-}
-
-static int
-chsc_add_chp_cmg_attr(struct channel_path *chp)
-{
- int ret;
-
- ret = sysfs_create_bin_file(&chp->dev.kobj,
- &chp_measurement_chars_attr);
- if (ret)
- return ret;
- ret = sysfs_create_bin_file(&chp->dev.kobj, &chp_measurement_attr);
- if (ret)
- sysfs_remove_bin_file(&chp->dev.kobj,
- &chp_measurement_chars_attr);
- return ret;
-}
-
-static void
-chsc_remove_cmg_attr(struct channel_subsystem *css)
-{
- int i;
-
- for (i = 0; i <= __MAX_CHPID; i++) {
- if (!css->chps[i])
- continue;
- chsc_remove_chp_cmg_attr(css->chps[i]);
- }
-}
-
-static int
-chsc_add_cmg_attr(struct channel_subsystem *css)
-{
- int i, ret;
-
- ret = 0;
- for (i = 0; i <= __MAX_CHPID; i++) {
- if (!css->chps[i])
- continue;
- ret = chsc_add_chp_cmg_attr(css->chps[i]);
- if (ret)
- goto cleanup;
- }
- return ret;
-cleanup:
- for (--i; i >= 0; i--) {
- if (!css->chps[i])
- continue;
- chsc_remove_chp_cmg_attr(css->chps[i]);
- }
- return ret;
-}
-
-
-static int
-__chsc_do_secm(struct channel_subsystem *css, int enable, void *page)
-{
- struct {
- struct chsc_header request;
- u32 operation_code : 2;
- u32 : 30;
- u32 key : 4;
- u32 : 28;
- u32 zeroes1;
- u32 cub_addr1;
- u32 zeroes2;
- u32 cub_addr2;
- u32 reserved[13];
- struct chsc_header response;
- u32 status : 8;
- u32 : 4;
- u32 fmt : 4;
- u32 : 16;
- } *secm_area;
- int ret, ccode;
-
- secm_area = page;
- secm_area->request.length = 0x0050;
- secm_area->request.code = 0x0016;
-
- secm_area->key = PAGE_DEFAULT_KEY;
- secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1;
- secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2;
-
- secm_area->operation_code = enable ? 0 : 1;
-
- ccode = chsc(secm_area);
- if (ccode > 0)
- return (ccode == 3) ? -ENODEV : -EBUSY;
-
- switch (secm_area->response.code) {
- case 0x0001: /* Success. */
- ret = 0;
- break;
- case 0x0003: /* Invalid block. */
- case 0x0007: /* Invalid format. */
- case 0x0008: /* Other invalid block. */
- CIO_CRW_EVENT(2, "Error in chsc request block!\n");
- ret = -EINVAL;
- break;
- case 0x0004: /* Command not provided in model. */
- CIO_CRW_EVENT(2, "Model does not provide secm\n");
- ret = -EOPNOTSUPP;
- break;
- case 0x0102: /* cub adresses incorrect */
- CIO_CRW_EVENT(2, "Invalid addresses in chsc request block\n");
- ret = -EINVAL;
- break;
- case 0x0103: /* key error */
- CIO_CRW_EVENT(2, "Access key error in secm\n");
- ret = -EINVAL;
- break;
- case 0x0105: /* error while starting */
- CIO_CRW_EVENT(2, "Error while starting channel measurement\n");
- ret = -EIO;
- break;
- default:
- CIO_CRW_EVENT(2, "Unknown CHSC response %d\n",
- secm_area->response.code);
- ret = -EIO;
- }
- return ret;
-}
-
-int
-chsc_secm(struct channel_subsystem *css, int enable)
-{
- void *secm_area;
- int ret;
-
- secm_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
- if (!secm_area)
- return -ENOMEM;
-
- mutex_lock(&css->mutex);
- if (enable && !css->cm_enabled) {
- css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
- css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
- if (!css->cub_addr1 || !css->cub_addr2) {
- free_page((unsigned long)css->cub_addr1);
- free_page((unsigned long)css->cub_addr2);
- free_page((unsigned long)secm_area);
- mutex_unlock(&css->mutex);
- return -ENOMEM;
- }
- }
- ret = __chsc_do_secm(css, enable, secm_area);
- if (!ret) {
- css->cm_enabled = enable;
- if (css->cm_enabled) {
- ret = chsc_add_cmg_attr(css);
- if (ret) {
- memset(secm_area, 0, PAGE_SIZE);
- __chsc_do_secm(css, 0, secm_area);
- css->cm_enabled = 0;
- }
- } else
- chsc_remove_cmg_attr(css);
- }
- if (enable && !css->cm_enabled) {
- free_page((unsigned long)css->cub_addr1);
- free_page((unsigned long)css->cub_addr2);
- }
- mutex_unlock(&css->mutex);
- free_page((unsigned long)secm_area);
- return ret;
-}
-
/*
* Files for the channel path entries.
*/
static DEVICE_ATTR(type, 0444, chp_type_show, NULL);
-static ssize_t
-chp_cmg_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct channel_path *chp = to_channelpath(dev);
-
- if (!chp)
- return 0;
- if (chp->cmg == -1) /* channel measurements not available */
- return sprintf(buf, "unknown\n");
- return sprintf(buf, "%x\n", chp->cmg);
-}
-
-static DEVICE_ATTR(cmg, 0444, chp_cmg_show, NULL);
-
-static ssize_t
-chp_shared_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct channel_path *chp = to_channelpath(dev);
-
- if (!chp)
- return 0;
- if (chp->shared == -1) /* channel measurements not available */
- return sprintf(buf, "unknown\n");
- return sprintf(buf, "%x\n", chp->shared);
-}
-
-static DEVICE_ATTR(shared, 0444, chp_shared_show, NULL);
-
static struct attribute * chp_attrs[] = {
&dev_attr_status.attr,
&dev_attr_type.attr,
- &dev_attr_cmg.attr,
- &dev_attr_shared.attr,
NULL,
};
if (!scpd_area)
return -ENOMEM;
- scpd_area->request.length = 0x0010;
- scpd_area->request.code = 0x0002;
+ scpd_area->request = (struct chsc_header) {
+ .length = 0x0010,
+ .code = 0x0002,
+ };
scpd_area->first_chpid = chpid;
scpd_area->last_chpid = chpid;
return ret;
}
-static void
-chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
- struct cmg_chars *chars)
-{
- switch (chp->cmg) {
- case 2:
- case 3:
- chp->cmg_chars = kmalloc(sizeof(struct cmg_chars),
- GFP_KERNEL);
- if (chp->cmg_chars) {
- int i, mask;
- struct cmg_chars *cmg_chars;
-
- cmg_chars = chp->cmg_chars;
- for (i = 0; i < NR_MEASUREMENT_CHARS; i++) {
- mask = 0x80 >> (i + 3);
- if (cmcv & mask)
- cmg_chars->values[i] = chars->values[i];
- else
- cmg_chars->values[i] = 0;
- }
- }
- break;
- default:
- /* No cmg-dependent data. */
- break;
- }
-}
-
-static int
-chsc_get_channel_measurement_chars(struct channel_path *chp)
-{
- int ccode, ret;
-
- struct {
- struct chsc_header request;
- u32 : 24;
- u32 first_chpid : 8;
- u32 : 24;
- u32 last_chpid : 8;
- u32 zeroes1;
- struct chsc_header response;
- u32 zeroes2;
- u32 not_valid : 1;
- u32 shared : 1;
- u32 : 22;
- u32 chpid : 8;
- u32 cmcv : 5;
- u32 : 11;
- u32 cmgq : 8;
- u32 cmg : 8;
- u32 zeroes3;
- u32 data[NR_MEASUREMENT_CHARS];
- } *scmc_area;
-
- scmc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
- if (!scmc_area)
- return -ENOMEM;
-
- scmc_area->request.length = 0x0010;
- scmc_area->request.code = 0x0022;
-
- scmc_area->first_chpid = chp->id;
- scmc_area->last_chpid = chp->id;
-
- ccode = chsc(scmc_area);
- if (ccode > 0) {
- ret = (ccode == 3) ? -ENODEV : -EBUSY;
- goto out;
- }
-
- switch (scmc_area->response.code) {
- case 0x0001: /* Success. */
- if (!scmc_area->not_valid) {
- chp->cmg = scmc_area->cmg;
- chp->shared = scmc_area->shared;
- chsc_initialize_cmg_chars(chp, scmc_area->cmcv,
- (struct cmg_chars *)
- &scmc_area->data);
- } else {
- chp->cmg = -1;
- chp->shared = -1;
- }
- ret = 0;
- break;
- case 0x0003: /* Invalid block. */
- case 0x0007: /* Invalid format. */
- case 0x0008: /* Invalid bit combination. */
- CIO_CRW_EVENT(2, "Error in chsc request block!\n");
- ret = -EINVAL;
- break;
- case 0x0004: /* Command not provided. */
- CIO_CRW_EVENT(2, "Model does not provide scmc\n");
- ret = -EOPNOTSUPP;
- break;
- default:
- CIO_CRW_EVENT(2, "Unknown CHSC response %d\n",
- scmc_area->response.code);
- ret = -EIO;
- }
-out:
- free_page((unsigned long)scmc_area);
- return ret;
-}
-
/*
* Entries for chpids on the system bus.
* This replaces /proc/chpids.
struct channel_path *chp;
int ret;
- chp = kzalloc(sizeof(struct channel_path), GFP_KERNEL);
+ chp = kmalloc(sizeof(struct channel_path), GFP_KERNEL);
if (!chp)
return -ENOMEM;
+ memset(chp, 0, sizeof(struct channel_path));
/* fill in status, etc. */
chp->id = chpid;
chp->state = 1;
- chp->dev.parent = &css[0]->device;
- chp->dev.release = chp_release;
+ chp->dev = (struct device) {
+ .parent = &css[0]->device,
+ .release = chp_release,
+ };
snprintf(chp->dev.bus_id, BUS_ID_SIZE, "chp0.%x", chpid);
/* Obtain channel path description and fill it in. */
ret = chsc_determine_channel_path_description(chpid, &chp->desc);
if (ret)
goto out_free;
- /* Get channel-measurement characteristics. */
- if (css_characteristics_avail && css_chsc_characteristics.scmc
- && css_chsc_characteristics.secm) {
- ret = chsc_get_channel_measurement_chars(chp);
- if (ret)
- goto out_free;
- } else {
- static int msg_done;
-
- if (!msg_done) {
- printk(KERN_WARNING "cio: Channel measurements not "
- "available, continuing.\n");
- msg_done = 1;
- }
- chp->cmg = -1;
- }
/* make it known to the system */
ret = device_register(&chp->dev);
if (ret) {
device_unregister(&chp->dev);
goto out_free;
- }
- mutex_lock(&css[0]->mutex);
- if (css[0]->cm_enabled) {
- ret = chsc_add_chp_cmg_attr(chp);
- if (ret) {
- sysfs_remove_group(&chp->dev.kobj, &chp_attr_group);
- device_unregister(&chp->dev);
- mutex_unlock(&css[0]->mutex);
- goto out_free;
- }
- }
- css[0]->chps[chpid] = chp;
- mutex_unlock(&css[0]->mutex);
+ } else
+ css[0]->chps[chpid] = chp;
return ret;
out_free:
kfree(chp);
return desc;
}
-static int reset_channel_path(struct channel_path *chp)
-{
- int cc;
-
- cc = rchp(chp->id);
- switch (cc) {
- case 0:
- return 0;
- case 2:
- return -EBUSY;
- default:
- return -ENODEV;
- }
-}
-
-static void reset_channel_paths_css(struct channel_subsystem *css)
-{
- int i;
-
- for (i = 0; i <= __MAX_CHPID; i++) {
- if (css->chps[i])
- reset_channel_path(css->chps[i]);
- }
-}
-
-void cio_reset_channel_paths(void)
-{
- int i;
-
- for (i = 0; i <= __MAX_CSSID; i++) {
- if (css[i] && css[i]->valid)
- reset_channel_paths_css(css[i]);
- }
-}
static int __init
chsc_alloc_sei_area(void)
sda_area = (void *)get_zeroed_page(GFP_KERNEL|GFP_DMA);
if (!sda_area)
return -ENOMEM;
- sda_area->request.length = 0x0400;
- sda_area->request.code = 0x0031;
+ sda_area->request = (struct chsc_header) {
+ .length = 0x0400,
+ .code = 0x0031,
+ };
sda_area->operation_code = operation_code;
ret = chsc(sda_area);
return -ENOMEM;
}
- scsc_area->request.length = 0x0010;
- scsc_area->request.code = 0x0010;
+ scsc_area->request = (struct chsc_header) {
+ .length = 0x0010,
+ .code = 0x0010,
+ };
result = chsc(scsc_area);
if (result) {
git://git.onelab.eu / linux-2.6.git / blobdiff