Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756021AbdD1Jk2 (ORCPT ); Fri, 28 Apr 2017 05:40:28 -0400 Received: from mga03.intel.com ([134.134.136.65]:34405 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1162653AbdD1Jjw (ORCPT ); Fri, 28 Apr 2017 05:39:52 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.37,387,1488873600"; d="scan'208";a="1124389901" From: Xiaoguang Chen To: kraxel@redhat.com, alex.williamson@redhat.com, intel-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, zhi.a.wang@intel.com, zhenyuw@linux.intel.com, linux-kernel@vger.kernel.org, zhiyuan.lv@intel.com, kevin.tian@intel.com Cc: Xiaoguang Chen Subject: [RFC PATCH 1/6] drm/i915/gvt: extend the GVT-g architecture to support vfio device region Date: Fri, 28 Apr 2017 17:35:25 +0800 Message-Id: <1493372130-27727-2-git-send-email-xiaoguang.chen@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1493372130-27727-1-git-send-email-xiaoguang.chen@intel.com> References: <1493372130-27727-1-git-send-email-xiaoguang.chen@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2334 Lines: 73 Signed-off-by: Xiaoguang Chen --- drivers/gpu/drm/i915/gvt/kvmgt.c | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 1ae0b40..3c6a02b 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -53,11 +53,21 @@ #define VFIO_PCI_INDEX_TO_OFFSET(index) ((u64)(index) << VFIO_PCI_OFFSET_SHIFT) #define VFIO_PCI_OFFSET_MASK (((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1) +struct vfio_region; +struct intel_vgpu_regops { + size_t (*rw)(struct intel_vgpu *vgpu, char *buf, + size_t count, loff_t *ppos, bool iswrite); + void (*release)(struct intel_vgpu *vgpu, + struct vfio_region *region); +}; + struct vfio_region { u32 type; u32 subtype; size_t size; u32 flags; + const struct intel_vgpu_regops *ops; + void *data; }; struct kvmgt_pgfn { @@ -642,7 +652,7 @@ static ssize_t intel_vgpu_rw(struct mdev_device *mdev, char *buf, int ret = -EINVAL; - if (index >= VFIO_PCI_NUM_REGIONS) { + if (index >= VFIO_PCI_NUM_REGIONS + vgpu->vdev.num_regions) { gvt_vgpu_err("invalid index: %u\n", index); return -EINVAL; } @@ -676,8 +686,11 @@ static ssize_t intel_vgpu_rw(struct mdev_device *mdev, char *buf, case VFIO_PCI_BAR5_REGION_INDEX: case VFIO_PCI_VGA_REGION_INDEX: case VFIO_PCI_ROM_REGION_INDEX: + break; default: - gvt_vgpu_err("unsupported region: %u\n", index); + index -= VFIO_PCI_NUM_REGIONS; + return vgpu->vdev.region[index].ops->rw(vgpu, buf, count, + ppos, is_write); } return ret == 0 ? count : ret; @@ -940,7 +953,8 @@ static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd, info.flags = VFIO_DEVICE_FLAGS_PCI; info.flags |= VFIO_DEVICE_FLAGS_RESET; - info.num_regions = VFIO_PCI_NUM_REGIONS; + info.num_regions = VFIO_PCI_NUM_REGIONS + + vgpu->vdev.num_regions; info.num_irqs = VFIO_PCI_NUM_IRQS; return copy_to_user((void __user *)arg, &info, minsz) ? @@ -1061,6 +1075,7 @@ static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd, } if (caps.size) { + info.flags |= VFIO_REGION_INFO_FLAG_CAPS; if (info.argsz < sizeof(info) + caps.size) { info.argsz = sizeof(info) + caps.size; info.cap_offset = 0; -- 1.9.1