ssd_area = page;
- ssd_area->request = (struct chsc_header) {
- .length = 0x0010,
- .code = 0x0004,
- };
+ ssd_area->request.length = 0x0010;
+ ssd_area->request.code = 0x0004;
ssd_area->ssid = sch->schid.ssid;
ssd_area->f_sch = sch->schid.sch_no;
struct device *dev;
memset(sei_area, 0, sizeof(*sei_area));
memset(&res_data, 0, sizeof(struct res_acc_data));
- sei_area->request = (struct chsc_header) {
- .length = 0x0010,
- .code = 0x000e,
- };
+ sei_area->request.length = 0x0010;
+ sei_area->request.code = 0x000e;
ccode = chsc(sei_area);
if (ccode > 0)
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_chars);
+
+ /* Only allow single reads. */
+ if (off || count < size)
+ return 0;
+ chp_measurement_copy_block((struct cmg_entry *)buf, css, chp->id);
+ 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 = (struct chsc_header) {
- .length = 0x0010,
- .code = 0x0002,
- };
+ scpd_area->request.length = 0x0010;
+ scpd_area->request.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.
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;
- } else
- css[0]->chps[chpid] = chp;
+ }
+ 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);
return ret;
out_free:
kfree(chp);
sda_area = (void *)get_zeroed_page(GFP_KERNEL|GFP_DMA);
if (!sda_area)
return -ENOMEM;
- sda_area->request = (struct chsc_header) {
- .length = 0x0400,
- .code = 0x0031,
- };
+ sda_area->request.length = 0x0400;
+ sda_area->request.code = 0x0031;
sda_area->operation_code = operation_code;
ret = chsc(sda_area);
return -ENOMEM;
}
- scsc_area->request = (struct chsc_header) {
- .length = 0x0010,
- .code = 0x0010,
- };
+ scsc_area->request.length = 0x0010;
+ scsc_area->request.code = 0x0010;
result = chsc(scsc_area);
if (result) {
projects / GitHub / MotorolaMobilityLLC / kernel-slsi.git / commitdiff