diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/cio/chsc.c | 11 | ||||
| -rw-r--r-- | drivers/s390/cio/chsc.h | 2 | ||||
| -rw-r--r-- | drivers/s390/cio/css.c | 11 | ||||
| -rw-r--r-- | drivers/s390/cio/css.h | 4 | ||||
| -rw-r--r-- | drivers/s390/cio/device_ops.c | 85 |
5 files changed, 104 insertions, 9 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c index 8f764a295a51..38017c4a31e9 100644 --- a/drivers/s390/cio/chsc.c +++ b/drivers/s390/cio/chsc.c @@ -1116,7 +1116,7 @@ int chsc_enable_facility(int operation_code) return ret; } -int __init chsc_get_cssid(int idx) +int __init chsc_get_cssid_iid(int idx, u8 *cssid, u8 *iid) { struct { struct chsc_header request; @@ -1127,7 +1127,8 @@ int __init chsc_get_cssid(int idx) u32 reserved2[3]; struct { u8 cssid; - u32 : 24; + u8 iid; + u32 : 16; } list[0]; } *sdcal_area; int ret; @@ -1153,8 +1154,10 @@ int __init chsc_get_cssid(int idx) } if ((addr_t) &sdcal_area->list[idx] < - (addr_t) &sdcal_area->response + sdcal_area->response.length) - ret = sdcal_area->list[idx].cssid; + (addr_t) &sdcal_area->response + sdcal_area->response.length) { + *cssid = sdcal_area->list[idx].cssid; + *iid = sdcal_area->list[idx].iid; + } else ret = -ENODEV; exit: diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h index 7416957ba9f4..c2b83b68bc57 100644 --- a/drivers/s390/cio/chsc.h +++ b/drivers/s390/cio/chsc.h @@ -208,7 +208,7 @@ int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token); int chsc_pnso(struct subchannel_id schid, struct chsc_pnso_area *pnso_area, u8 oc, struct chsc_pnso_resume_token resume_token, int cnc); -int __init chsc_get_cssid(int idx); +int __init chsc_get_cssid_iid(int idx, u8 *cssid, u8 *iid); #ifdef CONFIG_SCM_BUS int scm_update_information(void); diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c index aca022239b33..1981eb62d329 100644 --- a/drivers/s390/cio/css.c +++ b/drivers/s390/cio/css.c @@ -854,7 +854,7 @@ css_generate_pgid(struct channel_subsystem *css, u32 tod_high) if (css_general_characteristics.mcss) { css->global_pgid.pgid_high.ext_cssid.version = 0x80; css->global_pgid.pgid_high.ext_cssid.cssid = - (css->cssid < 0) ? 0 : css->cssid; + css->id_valid ? css->cssid : 0; } else { css->global_pgid.pgid_high.cpu_addr = stap(); } @@ -877,7 +877,7 @@ static ssize_t real_cssid_show(struct device *dev, struct device_attribute *a, { struct channel_subsystem *css = to_css(dev); - if (css->cssid < 0) + if (!css->id_valid) return -EINVAL; return sprintf(buf, "%x\n", css->cssid); @@ -975,7 +975,12 @@ static int __init setup_css(int nr) css->device.dma_mask = &css->device.coherent_dma_mask; mutex_init(&css->mutex); - css->cssid = chsc_get_cssid(nr); + ret = chsc_get_cssid_iid(nr, &css->cssid, &css->iid); + if (!ret) { + css->id_valid = true; + pr_info("Partition identifier %01x.%01x\n", css->cssid, + css->iid); + } css_generate_pgid(css, (u32) (get_tod_clock() >> 32)); ret = device_register(&css->device); diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h index 8d832900a63d..3f322ea0f498 100644 --- a/drivers/s390/cio/css.h +++ b/drivers/s390/cio/css.h @@ -115,7 +115,9 @@ extern int for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *); void css_update_ssd_info(struct subchannel *sch); struct channel_subsystem { - int cssid; + u8 cssid; + u8 iid; + bool id_valid; /* cssid,iid */ struct channel_path *chps[__MAX_CHPID + 1]; struct device device; struct pgid global_pgid; diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c index cdf44f398957..0fe7b2f2e7f5 100644 --- a/drivers/s390/cio/device_ops.c +++ b/drivers/s390/cio/device_ops.c @@ -733,6 +733,91 @@ int ccw_device_pnso(struct ccw_device *cdev, } EXPORT_SYMBOL_GPL(ccw_device_pnso); +/** + * ccw_device_get_cssid() - obtain Channel Subsystem ID + * @cdev: device to obtain the CSSID for + * @cssid: The resulting Channel Subsystem ID + */ +int ccw_device_get_cssid(struct ccw_device *cdev, u8 *cssid) +{ + struct device *sch_dev = cdev->dev.parent; + struct channel_subsystem *css = to_css(sch_dev->parent); + + if (css->id_valid) + *cssid = css->cssid; + return css->id_valid ? 0 : -ENODEV; +} +EXPORT_SYMBOL_GPL(ccw_device_get_cssid); + +/** + * ccw_device_get_iid() - obtain MIF-image ID + * @cdev: device to obtain the MIF-image ID for + * @iid: The resulting MIF-image ID + */ +int ccw_device_get_iid(struct ccw_device *cdev, u8 *iid) +{ + struct device *sch_dev = cdev->dev.parent; + struct channel_subsystem *css = to_css(sch_dev->parent); + + if (css->id_valid) + *iid = css->iid; + return css->id_valid ? 0 : -ENODEV; +} +EXPORT_SYMBOL_GPL(ccw_device_get_iid); + +/** + * ccw_device_get_chpid() - obtain Channel Path ID + * @cdev: device to obtain the Channel Path ID for + * @chp_idx: Index of the channel path + * @chpid: The resulting Channel Path ID + */ +int ccw_device_get_chpid(struct ccw_device *cdev, int chp_idx, u8 *chpid) +{ + struct subchannel *sch = to_subchannel(cdev->dev.parent); + int mask; + + if ((chp_idx < 0) || (chp_idx > 7)) + return -EINVAL; + mask = 0x80 >> chp_idx; + if (!(sch->schib.pmcw.pim & mask)) + return -ENODEV; + + *chpid = sch->schib.pmcw.chpid[chp_idx]; + return 0; +} +EXPORT_SYMBOL_GPL(ccw_device_get_chpid); + +/** + * ccw_device_get_chid() - obtain Channel ID associated with specified CHPID + * @cdev: device to obtain the Channel ID for + * @chp_idx: Index of the channel path + * @chid: The resulting Channel ID + */ +int ccw_device_get_chid(struct ccw_device *cdev, int chp_idx, u16 *chid) +{ + struct chp_id cssid_chpid; + struct channel_path *chp; + int rc; + + chp_id_init(&cssid_chpid); + rc = ccw_device_get_chpid(cdev, chp_idx, &cssid_chpid.id); + if (rc) + return rc; + chp = chpid_to_chp(cssid_chpid); + if (!chp) + return -ENODEV; + + mutex_lock(&chp->lock); + if (chp->desc_fmt1.flags & 0x10) + *chid = chp->desc_fmt1.chid; + else + rc = -ENODEV; + mutex_unlock(&chp->lock); + + return rc; +} +EXPORT_SYMBOL_GPL(ccw_device_get_chid); + /* * Allocate zeroed dma coherent 31 bit addressable memory using * the subchannels dma pool. Maximal size of allocation supported |