From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34985) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aYB00-0000SO-O8 for qemu-devel@nongnu.org; Tue, 23 Feb 2016 06:19:26 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aYAzw-0000E4-Az for qemu-devel@nongnu.org; Tue, 23 Feb 2016 06:19:24 -0500 Received: from e06smtp17.uk.ibm.com ([195.75.94.113]:59516) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aYAzv-0000DP-Vc for qemu-devel@nongnu.org; Tue, 23 Feb 2016 06:19:20 -0500 Received: from localhost by e06smtp17.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 23 Feb 2016 11:19:18 -0000 Received: from b06cxnps4076.portsmouth.uk.ibm.com (d06relay13.portsmouth.uk.ibm.com [9.149.109.198]) by d06dlp03.portsmouth.uk.ibm.com (Postfix) with ESMTP id 033411B08072 for ; Tue, 23 Feb 2016 11:19:35 +0000 (GMT) Received: from d06av09.portsmouth.uk.ibm.com (d06av09.portsmouth.uk.ibm.com [9.149.37.250]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u1NBJFnl3604814 for ; Tue, 23 Feb 2016 11:19:15 GMT Received: from d06av09.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av09.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u1NBJF59008526 for ; Tue, 23 Feb 2016 04:19:15 -0700 From: Cornelia Huck Date: Tue, 23 Feb 2016 12:19:07 +0100 Message-Id: <1456226350-3367-8-git-send-email-cornelia.huck@de.ibm.com> In-Reply-To: <1456226350-3367-1-git-send-email-cornelia.huck@de.ibm.com> References: <1456226350-3367-1-git-send-email-cornelia.huck@de.ibm.com> Subject: [Qemu-devel] [PATCH 07/10] s390x/css: introduce indicator refcounting interfaces List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Cornelia Huck , borntraeger@de.ibm.com, jfrei@linux.vnet.ibm.com, Yi Min Zhao , agraf@suse.de From: Yi Min Zhao Currently, virtio-ccw uses its own interfaces to keep indicators mapped just once even if the same address has been registered multiple times. These interfaces fit the PCI use case as well. Therefore, move them to css and make them generic interfaces. Signed-off-by: Yi Min Zhao Reviewed-by: Cornelia Huck Signed-off-by: Cornelia Huck --- hw/s390x/css.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++ hw/s390x/css.h | 14 ++++++++++++ hw/s390x/virtio-ccw.c | 63 --------------------------------------------------- hw/s390x/virtio-ccw.h | 11 ++------- 4 files changed, 79 insertions(+), 72 deletions(-) diff --git a/hw/s390x/css.c b/hw/s390x/css.c index c29068b..c02f5bc 100644 --- a/hw/s390x/css.c +++ b/hw/s390x/css.c @@ -60,10 +60,72 @@ typedef struct ChannelSubSys { CssImage *css[MAX_CSSID + 1]; uint8_t default_cssid; QTAILQ_HEAD(, IoAdapter) io_adapters; + QTAILQ_HEAD(, IndAddr) indicator_addresses; } ChannelSubSys; static ChannelSubSys *channel_subsys; +IndAddr *get_indicator(hwaddr ind_addr, int len) +{ + IndAddr *indicator; + + QTAILQ_FOREACH(indicator, &channel_subsys->indicator_addresses, sibling) { + if (indicator->addr == ind_addr) { + indicator->refcnt++; + return indicator; + } + } + indicator = g_new0(IndAddr, 1); + indicator->addr = ind_addr; + indicator->len = len; + indicator->refcnt = 1; + QTAILQ_INSERT_TAIL(&channel_subsys->indicator_addresses, + indicator, sibling); + return indicator; +} + +static int s390_io_adapter_map(AdapterInfo *adapter, uint64_t map_addr, + bool do_map) +{ + S390FLICState *fs = s390_get_flic(); + S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); + + return fsc->io_adapter_map(fs, adapter->adapter_id, map_addr, do_map); +} + +void release_indicator(AdapterInfo *adapter, IndAddr *indicator) +{ + assert(indicator->refcnt > 0); + indicator->refcnt--; + if (indicator->refcnt > 0) { + return; + } + QTAILQ_REMOVE(&channel_subsys->indicator_addresses, indicator, sibling); + if (indicator->map) { + s390_io_adapter_map(adapter, indicator->map, false); + } + g_free(indicator); +} + +int map_indicator(AdapterInfo *adapter, IndAddr *indicator) +{ + int ret; + + if (indicator->map) { + return 0; /* already mapped is not an error */ + } + indicator->map = indicator->addr; + ret = s390_io_adapter_map(adapter, indicator->map, true); + if ((ret != 0) && (ret != -ENOSYS)) { + goto out_err; + } + return 0; + +out_err: + indicator->map = 0; + return ret; +} + int css_create_css_image(uint8_t cssid, bool default_image) { trace_css_new_image(cssid, default_image ? "(default)" : ""); @@ -1524,6 +1586,7 @@ static void css_init(void) channel_subsys->crws_lost = false; channel_subsys->chnmon_active = false; QTAILQ_INIT(&channel_subsys->io_adapters); + QTAILQ_INIT(&channel_subsys->indicator_addresses); } machine_init(css_init); diff --git a/hw/s390x/css.h b/hw/s390x/css.h index a47937d..a320eea 100644 --- a/hw/s390x/css.h +++ b/hw/s390x/css.h @@ -12,6 +12,8 @@ #ifndef CSS_H #define CSS_H +#include "hw/s390x/adapter.h" +#include "hw/s390x/s390_flic.h" #include "ioinst.h" /* Channel subsystem constants. */ @@ -86,6 +88,18 @@ struct SubchDev { void *driver_data; }; +typedef struct IndAddr { + hwaddr addr; + uint64_t map; + unsigned long refcnt; + int len; + QTAILQ_ENTRY(IndAddr) sibling; +} IndAddr; + +IndAddr *get_indicator(hwaddr ind_addr, int len); +void release_indicator(AdapterInfo *adapter, IndAddr *indicator); +int map_indicator(AdapterInfo *adapter, IndAddr *indicator); + typedef SubchDev *(*css_subch_cb_func)(uint8_t m, uint8_t cssid, uint8_t ssid, uint16_t schid); void subch_device_save(SubchDev *s, QEMUFile *f); diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index 74b9e2e..cb887ba 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -32,69 +32,6 @@ #include "virtio-ccw.h" #include "trace.h" -static QTAILQ_HEAD(, IndAddr) indicator_addresses = - QTAILQ_HEAD_INITIALIZER(indicator_addresses); - -static IndAddr *get_indicator(hwaddr ind_addr, int len) -{ - IndAddr *indicator; - - QTAILQ_FOREACH(indicator, &indicator_addresses, sibling) { - if (indicator->addr == ind_addr) { - indicator->refcnt++; - return indicator; - } - } - indicator = g_new0(IndAddr, 1); - indicator->addr = ind_addr; - indicator->len = len; - indicator->refcnt = 1; - QTAILQ_INSERT_TAIL(&indicator_addresses, indicator, sibling); - return indicator; -} - -static int s390_io_adapter_map(AdapterInfo *adapter, uint64_t map_addr, - bool do_map) -{ - S390FLICState *fs = s390_get_flic(); - S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); - - return fsc->io_adapter_map(fs, adapter->adapter_id, map_addr, do_map); -} - -static void release_indicator(AdapterInfo *adapter, IndAddr *indicator) -{ - assert(indicator->refcnt > 0); - indicator->refcnt--; - if (indicator->refcnt > 0) { - return; - } - QTAILQ_REMOVE(&indicator_addresses, indicator, sibling); - if (indicator->map) { - s390_io_adapter_map(adapter, indicator->map, false); - } - g_free(indicator); -} - -static int map_indicator(AdapterInfo *adapter, IndAddr *indicator) -{ - int ret; - - if (indicator->map) { - return 0; /* already mapped is not an error */ - } - indicator->map = indicator->addr; - ret = s390_io_adapter_map(adapter, indicator->map, true); - if ((ret != 0) && (ret != -ENOSYS)) { - goto out_err; - } - return 0; - -out_err: - indicator->map = 0; - return ret; -} - static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size, VirtioCcwDevice *dev); diff --git a/hw/s390x/virtio-ccw.h b/hw/s390x/virtio-ccw.h index a526d2f..66c831b 100644 --- a/hw/s390x/virtio-ccw.h +++ b/hw/s390x/virtio-ccw.h @@ -23,7 +23,8 @@ #include #include #include -#include + +#include "css.h" #define VIRTUAL_CSSID 0xfe @@ -75,14 +76,6 @@ typedef struct VirtIOCCWDeviceClass { #define VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT 1 #define VIRTIO_CCW_FLAG_USE_IOEVENTFD (1 << VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT) -typedef struct IndAddr { - hwaddr addr; - uint64_t map; - unsigned long refcnt; - int len; - QTAILQ_ENTRY(IndAddr) sibling; -} IndAddr; - struct VirtioCcwDevice { DeviceState parent_obj; SubchDev *sch; -- 2.7.1