From 8f3cf0128cbac1ac19be8515dc184edb88dd5fb1 Mon Sep 17 00:00:00 2001 From: Xiao Feng Ren Date: Wed, 17 May 2017 02:48:04 +0200 Subject: s390x/css: realize css_sch_build_schib The S390 virtual css support already has a mechanism to build a virtual subchannel information block (schib) and provide virtual subchannels to the guest. However, to pass-through subchannels to a guest, we need to introduce a new mechanism to build its schib according to the real device information. Thus we realize a new css sch_build_schib function to extract the path_masks, chpids, chpid type from sysfs. To reuse the existing code, we refactor css_add_virtual_chpid to css_add_chpid. Reviewed-by: Pierre Morel Signed-off-by: Xiao Feng Ren Signed-off-by: Dong Jia Shi Message-Id: <20170517004813.58227-5-bjsdjshi@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck --- include/hw/s390x/css.h | 36 +++++++++++++++++++----------------- 1 file changed, 19 insertions(+), 17 deletions(-) (limited to 'include/hw/s390x') diff --git a/include/hw/s390x/css.h b/include/hw/s390x/css.h index e61fa74d9b..e59a11537f 100644 --- a/include/hw/s390x/css.h +++ b/include/hw/s390x/css.h @@ -95,6 +95,24 @@ struct SubchDev { void *driver_data; }; +/* + * Identify a device within the channel subsystem. + * Note that this can be used to identify either the subchannel or + * the attached I/O device, as there's always one I/O device per + * subchannel. + */ +typedef struct CssDevId { + uint8_t cssid; + uint8_t ssid; + uint16_t devid; + bool valid; +} CssDevId; + +extern PropertyInfo css_devid_propinfo; + +#define DEFINE_PROP_CSS_DEV_ID(_n, _s, _f) \ + DEFINE_PROP(_n, _s, _f, css_devid_propinfo, CssDevId) + typedef struct IndAddr { hwaddr addr; uint64_t map; @@ -116,6 +134,7 @@ bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno); void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid, uint16_t devno, SubchDev *sch); void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type); +int css_sch_build_schib(SubchDev *sch, CssDevId *dev_id); unsigned int css_find_free_chpid(uint8_t cssid); uint16_t css_build_subchannel_id(SubchDev *sch); void css_reset(void); @@ -164,23 +183,6 @@ int css_do_rsch(SubchDev *sch); int css_do_rchp(uint8_t cssid, uint8_t chpid); bool css_present(uint8_t cssid); #endif -/* - * Identify a device within the channel subsystem. - * Note that this can be used to identify either the subchannel or - * the attached I/O device, as there's always one I/O device per - * subchannel. - */ -typedef struct CssDevId { - uint8_t cssid; - uint8_t ssid; - uint16_t devid; - bool valid; -} CssDevId; - -extern PropertyInfo css_devid_propinfo; - -#define DEFINE_PROP_CSS_DEV_ID(_n, _s, _f) \ - DEFINE_PROP(_n, _s, _f, css_devid_propinfo, CssDevId) extern PropertyInfo css_devid_ro_propinfo; -- cgit v1.2.3