From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40874) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZAZ8x-0001K9-Gd for qemu-devel@nongnu.org; Thu, 02 Jul 2015 03:42:52 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZAZ8t-0006VL-3V for qemu-devel@nongnu.org; Thu, 02 Jul 2015 03:42:47 -0400 Received: from e06smtp11.uk.ibm.com ([195.75.94.107]:49812) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZAZ8s-0006Um-Ng for qemu-devel@nongnu.org; Thu, 02 Jul 2015 03:42:43 -0400 Received: from /spool/local by e06smtp11.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 2 Jul 2015 08:42:40 +0100 Received: from b06cxnps3074.portsmouth.uk.ibm.com (d06relay09.portsmouth.uk.ibm.com [9.149.109.194]) by d06dlp01.portsmouth.uk.ibm.com (Postfix) with ESMTP id A787617D805F for ; Thu, 2 Jul 2015 08:43:50 +0100 (BST) Received: from d06av05.portsmouth.uk.ibm.com (d06av05.portsmouth.uk.ibm.com [9.149.37.229]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t627gbKf34275570 for ; Thu, 2 Jul 2015 07:42:37 GMT Received: from d06av05.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av05.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t627gaid010241 for ; Thu, 2 Jul 2015 01:42:37 -0600 From: Cornelia Huck Date: Thu, 2 Jul 2015 09:42:21 +0200 Message-Id: <1435822945-30232-8-git-send-email-cornelia.huck@de.ibm.com> In-Reply-To: <1435822945-30232-1-git-send-email-cornelia.huck@de.ibm.com> References: <1435822945-30232-1-git-send-email-cornelia.huck@de.ibm.com> Subject: [Qemu-devel] [PULL for-2.4 07/11] s390x/virtio-ccw: support virtio-1 set_vq format List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: peter.maydell@linaro.org Cc: Cornelia Huck , borntraeger@de.ibm.com, jfrei@linux.vnet.ibm.com, qemu-devel@nongnu.org, agraf@suse.de Support the new CCW_CMD_SET_VQ format for virtio-1 devices. While we're at it, refactor the code a bit and enforce big endian fields (which had always been required, even for legacy). Reviewed-by: Thomas Huth Signed-off-by: Cornelia Huck Reviewed-by: Michael S. Tsirkin --- hw/s390x/virtio-ccw.c | 133 ++++++++++++++++++++++++++++++++++---------------- 1 file changed, 92 insertions(+), 41 deletions(-) diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index d374d3f..9dc9bbe 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -239,11 +239,20 @@ VirtualCssBus *virtual_css_bus_init(void) } /* Communication blocks used by several channel commands. */ -typedef struct VqInfoBlock { +typedef struct VqInfoBlockLegacy { uint64_t queue; uint32_t align; uint16_t index; uint16_t num; +} QEMU_PACKED VqInfoBlockLegacy; + +typedef struct VqInfoBlock { + uint64_t desc; + uint32_t res0; + uint16_t index; + uint16_t num; + uint64_t avail; + uint64_t used; } QEMU_PACKED VqInfoBlock; typedef struct VqConfigBlock { @@ -270,17 +279,20 @@ typedef struct VirtioRevInfo { } QEMU_PACKED VirtioRevInfo; /* Specify where the virtqueues for the subchannel are in guest memory. */ -static int virtio_ccw_set_vqs(SubchDev *sch, uint64_t addr, uint32_t align, - uint16_t index, uint16_t num) +static int virtio_ccw_set_vqs(SubchDev *sch, VqInfoBlock *info, + VqInfoBlockLegacy *linfo) { VirtIODevice *vdev = virtio_ccw_get_vdev(sch); + uint16_t index = info ? info->index : linfo->index; + uint16_t num = info ? info->num : linfo->num; + uint64_t desc = info ? info->desc : linfo->queue; if (index >= VIRTIO_CCW_QUEUE_MAX) { return -EINVAL; } /* Current code in virtio.c relies on 4K alignment. */ - if (addr && (align != 4096)) { + if (linfo && desc && (linfo->align != 4096)) { return -EINVAL; } @@ -288,8 +300,12 @@ static int virtio_ccw_set_vqs(SubchDev *sch, uint64_t addr, uint32_t align, return -EINVAL; } - virtio_queue_set_addr(vdev, index, addr); - if (!addr) { + if (info) { + virtio_queue_set_rings(vdev, index, desc, info->avail, info->used); + } else { + virtio_queue_set_addr(vdev, index, desc); + } + if (!desc) { virtio_queue_set_vector(vdev, index, VIRTIO_NO_VECTOR); } else { /* Fail if we don't have a big enough queue. */ @@ -323,10 +339,78 @@ static void virtio_ccw_reset_virtio(VirtioCcwDevice *dev, VirtIODevice *vdev) dev->sch->thinint_active = false; } -static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) +static int virtio_ccw_handle_set_vq(SubchDev *sch, CCW1 ccw, bool check_len, + bool is_legacy) { int ret; VqInfoBlock info; + VqInfoBlockLegacy linfo; + size_t info_len = is_legacy ? sizeof(linfo) : sizeof(info); + + if (check_len) { + if (ccw.count != info_len) { + return -EINVAL; + } + } else if (ccw.count < info_len) { + /* Can't execute command. */ + return -EINVAL; + } + if (!ccw.cda) { + return -EFAULT; + } + if (is_legacy) { + linfo.queue = address_space_ldq_be(&address_space_memory, ccw.cda, + MEMTXATTRS_UNSPECIFIED, NULL); + linfo.align = address_space_ldl_be(&address_space_memory, + ccw.cda + sizeof(linfo.queue), + MEMTXATTRS_UNSPECIFIED, + NULL); + linfo.index = address_space_lduw_be(&address_space_memory, + ccw.cda + sizeof(linfo.queue) + + sizeof(linfo.align), + MEMTXATTRS_UNSPECIFIED, + NULL); + linfo.num = address_space_lduw_be(&address_space_memory, + ccw.cda + sizeof(linfo.queue) + + sizeof(linfo.align) + + sizeof(linfo.index), + MEMTXATTRS_UNSPECIFIED, + NULL); + ret = virtio_ccw_set_vqs(sch, NULL, &linfo); + } else { + info.desc = address_space_ldq_be(&address_space_memory, ccw.cda, + MEMTXATTRS_UNSPECIFIED, NULL); + info.index = address_space_lduw_be(&address_space_memory, + ccw.cda + sizeof(info.desc) + + sizeof(info.res0), + MEMTXATTRS_UNSPECIFIED, NULL); + info.num = address_space_lduw_be(&address_space_memory, + ccw.cda + sizeof(info.desc) + + sizeof(info.res0) + + sizeof(info.index), + MEMTXATTRS_UNSPECIFIED, NULL); + info.avail = address_space_ldq_be(&address_space_memory, + ccw.cda + sizeof(info.desc) + + sizeof(info.res0) + + sizeof(info.index) + + sizeof(info.num), + MEMTXATTRS_UNSPECIFIED, NULL); + info.used = address_space_ldq_be(&address_space_memory, + ccw.cda + sizeof(info.desc) + + sizeof(info.res0) + + sizeof(info.index) + + sizeof(info.num) + + sizeof(info.avail), + MEMTXATTRS_UNSPECIFIED, NULL); + ret = virtio_ccw_set_vqs(sch, &info, NULL); + } + sch->curr_status.scsw.count = 0; + return ret; +} + +static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) +{ + int ret; VirtioRevInfo revinfo; uint8_t status; VirtioFeatDesc features; @@ -351,40 +435,7 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) /* Look at the command. */ switch (ccw.cmd_code) { case CCW_CMD_SET_VQ: - if (check_len) { - if (ccw.count != sizeof(info)) { - ret = -EINVAL; - break; - } - } else if (ccw.count < sizeof(info)) { - /* Can't execute command. */ - ret = -EINVAL; - break; - } - if (!ccw.cda) { - ret = -EFAULT; - } else { - info.queue = address_space_ldq(&address_space_memory, ccw.cda, - MEMTXATTRS_UNSPECIFIED, NULL); - info.align = address_space_ldl(&address_space_memory, - ccw.cda + sizeof(info.queue), - MEMTXATTRS_UNSPECIFIED, - NULL); - info.index = address_space_lduw(&address_space_memory, - ccw.cda + sizeof(info.queue) - + sizeof(info.align), - MEMTXATTRS_UNSPECIFIED, - NULL); - info.num = address_space_lduw(&address_space_memory, - ccw.cda + sizeof(info.queue) - + sizeof(info.align) - + sizeof(info.index), - MEMTXATTRS_UNSPECIFIED, - NULL); - ret = virtio_ccw_set_vqs(sch, info.queue, info.align, info.index, - info.num); - sch->curr_status.scsw.count = 0; - } + ret = virtio_ccw_handle_set_vq(sch, ccw, check_len, dev->revision < 1); break; case CCW_CMD_VDEV_RESET: virtio_ccw_reset_virtio(dev, vdev); -- 2.4.5