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From: Tina Zhang <tina.zhang@intel.com>
To: intel-gvt-dev@lists.freedesktop.org
Cc: Tina Zhang <tina.zhang@intel.com>,
	kraxel@redhat.com, alex.williamson@redhat.com,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	hang.yuan@intel.com, zhiyuan.lv@intel.com,
	Eric Auger <eric.auger@redhat.com>
Subject: [PATCH v5 1/6] vfio: Define device specific irq type capability
Date: Fri, 16 Aug 2019 10:35:23 +0800
Message-ID: <20190816023528.30210-2-tina.zhang@intel.com> (raw)
In-Reply-To: <20190816023528.30210-1-tina.zhang@intel.com>

Cap the number of irqs with fixed indexes and use capability chains
to chain device specific irqs.

Signed-off-by: Tina Zhang <tina.zhang@intel.com>
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
 include/uapi/linux/vfio.h | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index 02bb7ad6e986..d83c9f136a5b 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -444,11 +444,27 @@ struct vfio_irq_info {
 #define VFIO_IRQ_INFO_MASKABLE		(1 << 1)
 #define VFIO_IRQ_INFO_AUTOMASKED	(1 << 2)
 #define VFIO_IRQ_INFO_NORESIZE		(1 << 3)
+#define VFIO_IRQ_INFO_FLAG_CAPS		(1 << 4) /* Info supports caps */
 	__u32	index;		/* IRQ index */
 	__u32	count;		/* Number of IRQs within this index */
+	__u32	cap_offset;	/* Offset within info struct of first cap */
 };
 #define VFIO_DEVICE_GET_IRQ_INFO	_IO(VFIO_TYPE, VFIO_BASE + 9)
 
+/*
+ * The irq type capability allows irqs unique to a specific device or
+ * class of devices to be exposed.
+ *
+ * The structures below define version 1 of this capability.
+ */
+#define VFIO_IRQ_INFO_CAP_TYPE      3
+
+struct vfio_irq_info_cap_type {
+	struct vfio_info_cap_header header;
+	__u32 type;     /* global per bus driver */
+	__u32 subtype;  /* type specific */
+};
+
 /**
  * VFIO_DEVICE_SET_IRQS - _IOW(VFIO_TYPE, VFIO_BASE + 10, struct vfio_irq_set)
  *
@@ -550,7 +566,8 @@ enum {
 	VFIO_PCI_MSIX_IRQ_INDEX,
 	VFIO_PCI_ERR_IRQ_INDEX,
 	VFIO_PCI_REQ_IRQ_INDEX,
-	VFIO_PCI_NUM_IRQS
+	VFIO_PCI_NUM_IRQS = 5	/* Fixed user ABI, IRQ indexes >=5 use   */
+				/* device specific cap to define content */
 };
 
 /*
-- 
2.17.1


  reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-16  2:35 [PATCH v5 0/6] Deliver vGPU display refresh event to userspace Tina Zhang
2019-08-16  2:35 ` Tina Zhang [this message]
2019-08-16 20:51   ` [PATCH v5 1/6] vfio: Define device specific irq type capability Alex Williamson
2019-08-20  0:56     ` Zhang, Tina
2019-08-16  2:35 ` [PATCH v5 2/6] vfio: Introduce vGPU display irq type Tina Zhang
2019-08-16 20:51   ` Alex Williamson
2019-08-20  2:12     ` Zhang, Tina
2019-08-20  7:20       ` kraxel
2019-08-20 15:03         ` Alex Williamson
2019-08-20 15:32       ` Alex Williamson
2019-08-16  2:35 ` [PATCH v5 3/6] drm/i915/gvt: Register vGPU display event irq Tina Zhang
2019-08-16  2:35 ` [PATCH v5 4/6] drm/i915/gvt: Deliver vGPU refresh event to userspace Tina Zhang
2019-08-16  2:35 ` [PATCH v5 5/6] drm/i915/gvt: Deliver async primary plane page flip events at vblank Tina Zhang
2019-08-16  2:35 ` [PATCH v5 6/6] drm/i915/gvt: Add cursor plane reg update trap emulation handler Tina Zhang

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