[dpdk-dev] [PATCH 0/5 v3] virtio: patches

[dpdk-dev] [PATCH 0/5 v3] virtio: patches

[Stephen Hemminger]

From: Stephen Hemminger <shemming@brocade.com>

This is update to earlier virtio patches, the only change is to
handle the rename to drivers/net

Stephen Hemminger (5):
  virtio: remove blank lines
  virtio: don't enable/disable rx modes unless supported
  virtio: don't set mac table unless negotiated
  virtio: clarify feature bit handling
  virtio: fix ring size negotiation

 drivers/net/virtio/virtio_ethdev.c | 70 +++++++++++++++------------
 drivers/net/virtio/virtio_ethdev.h | 27 ++++-------
 drivers/net/virtio/virtio_pci.h    | 96 +++++++++++++++++++-------------------
 drivers/net/virtio/virtqueue.h     |  8 +---
 4 files changed, 100 insertions(+), 101 deletions(-)

-- 
2.1.4

[dpdk-dev] [PATCH 1/5] virtio: remove blank lines

[Stephen Hemminger]

From: Stephen Hemminger <shemming@brocade.com>

Putting blank line between function and following conditional
just wastes screen space, and makes code less obvious.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/net/virtio/virtio_ethdev.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index f74e413..77f18a0 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -228,7 +228,6 @@ virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 	dlen[0] = sizeof(uint16_t);
 
 	ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
-
 	if (ret) {
 		PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 			  "failed, this is too late now...");
@@ -394,7 +393,6 @@ virtio_dev_cq_queue_setup(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx,
 	PMD_INIT_FUNC_TRACE();
 	ret = virtio_dev_queue_setup(dev, VTNET_CQ, VTNET_SQ_CQ_QUEUE_IDX,
 			vtpci_queue_idx, nb_desc, socket_id, &vq);
-
 	if (ret < 0) {
 		PMD_INIT_LOG(ERR, "control vq initialization failed");
 		return ret;
@@ -434,7 +432,6 @@ virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 	dlen[0] = 1;
 
 	ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
-
 	if (ret)
 		PMD_INIT_LOG(ERR, "Failed to enable promisc");
 }
@@ -453,7 +450,6 @@ virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 	dlen[0] = 1;
 
 	ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
-
 	if (ret)
 		PMD_INIT_LOG(ERR, "Failed to disable promisc");
 }
@@ -472,7 +468,6 @@ virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 	dlen[0] = 1;
 
 	ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
-
 	if (ret)
 		PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 }
@@ -491,7 +486,6 @@ virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 	dlen[0] = 1;
 
 	ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
-
 	if (ret)
 		PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 }
-- 
2.1.4

Re: [dpdk-dev] [PATCH 1/5] virtio: remove blank lines

[Ouyang, Changchun]

> -----Original Message-----
> From: Stephen Hemminger [mailto:stephen@networkplumber.org]
> Sent: Thursday, June 11, 2015 11:53 PM
> To: Ouyang, Changchun
> Cc: dev@dpdk.org; Stephen Hemminger; Stephen Hemminger
> Subject: [PATCH 1/5] virtio: remove blank lines
> 
> From: Stephen Hemminger <shemming@brocade.com>
> 
> Putting blank line between function and following conditional just wastes
> screen space, and makes code less obvious.
> 
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

Acked-by: Changchun Ouyang<changchun.ouyang@intel.com>

[dpdk-dev] [PATCH 2/5] virtio: don't enable/disable rx modes unless supported

[Stephen Hemminger]

From: Stephen Hemminger <shemming@brocade.com>

If negotiation with host says that controlling Rx mode is
not supported, then don't try.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/net/virtio/virtio_ethdev.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 77f18a0..3476ad3 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -426,6 +426,11 @@ virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 	int dlen[1];
 	int ret;
 
+	if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
+		PMD_INIT_LOG(INFO, "host does not support rx control\n");
+		return;
+	}
+
 	ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 	ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 	ctrl.data[0] = 1;
@@ -444,6 +449,11 @@ virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 	int dlen[1];
 	int ret;
 
+	if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
+		PMD_INIT_LOG(INFO, "host does not support rx control\n");
+		return;
+	}
+
 	ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 	ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 	ctrl.data[0] = 0;
@@ -462,6 +472,11 @@ virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 	int dlen[1];
 	int ret;
 
+	if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
+		PMD_INIT_LOG(INFO, "host does not support rx control\n");
+		return;
+	}
+
 	ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 	ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 	ctrl.data[0] = 1;
@@ -480,6 +495,11 @@ virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 	int dlen[1];
 	int ret;
 
+	if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
+		PMD_INIT_LOG(INFO, "host does not support rx control\n");
+		return;
+	}
+
 	ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 	ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 	ctrl.data[0] = 0;
-- 
2.1.4

Re: [dpdk-dev] [PATCH 2/5] virtio: don't enable/disable rx modes unless supported

[Ouyang, Changchun]

> -----Original Message-----
> From: Stephen Hemminger [mailto:stephen@networkplumber.org]
> Sent: Thursday, June 11, 2015 11:53 PM
> To: Ouyang, Changchun
> Cc: dev@dpdk.org; Stephen Hemminger; Stephen Hemminger
> Subject: [PATCH 2/5] virtio: don't enable/disable rx modes unless supported
> 
> From: Stephen Hemminger <shemming@brocade.com>
> 
> If negotiation with host says that controlling Rx mode is not supported, then
> don't try.
> 
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

Acked-by: Changchun Ouyang<changchun.ouyang@intel.com>

[dpdk-dev] [PATCH 3/5] virtio: don't set mac table unless negotiated

[Stephen Hemminger]

From: Stephen Hemminger <shemming@brocade.com>

Don't attempt to set the MAC address table unless the host allows
it in feature negotiation. Also, don't return a value from mac_table_set
since all callers ignore the return value.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/net/virtio/virtio_ethdev.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 3476ad3..ad49fc1 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -668,7 +668,7 @@ virtio_get_hwaddr(struct virtio_hw *hw)
 	}
 }
 
-static int
+static void
 virtio_mac_table_set(struct virtio_hw *hw,
 		     const struct virtio_net_ctrl_mac *uc,
 		     const struct virtio_net_ctrl_mac *mc)
@@ -676,6 +676,11 @@ virtio_mac_table_set(struct virtio_hw *hw,
 	struct virtio_pmd_ctrl ctrl;
 	int err, len[2];
 
+	if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
+		PMD_DRV_LOG(INFO, "host does not support mac table\n");
+		return;
+	}
+
 	ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 	ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
 
@@ -688,8 +693,6 @@ virtio_mac_table_set(struct virtio_hw *hw,
 	err = virtio_send_command(hw->cvq, &ctrl, len, 2);
 	if (err != 0)
 		PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
-
-	return err;
 }
 
 static void
-- 
2.1.4

Re: [dpdk-dev] [PATCH 3/5] virtio: don't set mac table unless negotiated

[Ouyang, Changchun]

> -----Original Message-----
> From: Stephen Hemminger [mailto:stephen@networkplumber.org]
> Sent: Thursday, June 11, 2015 11:53 PM
> To: Ouyang, Changchun
> Cc: dev@dpdk.org; Stephen Hemminger; Stephen Hemminger
> Subject: [PATCH 3/5] virtio: don't set mac table unless negotiated
> 
> From: Stephen Hemminger <shemming@brocade.com>
> 
> Don't attempt to set the MAC address table unless the host allows it in
> feature negotiation. Also, don't return a value from mac_table_set since all
> callers ignore the return value.
> 
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

Acked-by: Changchun Ouyang<changchun.ouyang@intel.com>

[dpdk-dev] [PATCH 4/5] virtio: clarify feature bit handling

[Stephen Hemminger]

From: Stephen Hemminger <shemming@brocade.com>

Change the features from bit mask to bit number. This allows the
DPDK driver to use the definitions from Linux (yes the header
files already use a license compatiable with DPDK). This makes DPDK
driver handle future feature bit changes.

Get rid of double negative code in the feature bit intialization.
Instead just have a new define with the list of feature bits implemented.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/net/virtio/virtio_ethdev.c | 17 +------
 drivers/net/virtio/virtio_ethdev.h | 27 ++++-------
 drivers/net/virtio/virtio_pci.h    | 96 +++++++++++++++++++-------------------
 drivers/net/virtio/virtqueue.h     |  8 +---
 4 files changed, 61 insertions(+), 87 deletions(-)

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index ad49fc1..2afa371 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -799,23 +799,10 @@ virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
 static void
 virtio_negotiate_features(struct virtio_hw *hw)
 {
-	uint32_t host_features, mask;
-
-	/* checksum offload not implemented */
-	mask = VIRTIO_NET_F_CSUM | VIRTIO_NET_F_GUEST_CSUM;
-
-	/* TSO and LRO are only available when their corresponding
-	 * checksum offload feature is also negotiated.
-	 */
-	mask |= VIRTIO_NET_F_HOST_TSO4 | VIRTIO_NET_F_HOST_TSO6 | VIRTIO_NET_F_HOST_ECN;
-	mask |= VIRTIO_NET_F_GUEST_TSO4 | VIRTIO_NET_F_GUEST_TSO6 | VIRTIO_NET_F_GUEST_ECN;
-	mask |= VTNET_LRO_FEATURES;
-
-	/* not negotiating INDIRECT descriptor table support */
-	mask |= VIRTIO_RING_F_INDIRECT_DESC;
+	uint32_t host_features;
 
 	/* Prepare guest_features: feature that driver wants to support */
-	hw->guest_features = VTNET_FEATURES & ~mask;
+	hw->guest_features = VIRTIO_PMD_GUEST_FEATURES;
 	PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %x",
 		hw->guest_features);
 
diff --git a/drivers/net/virtio/virtio_ethdev.h b/drivers/net/virtio/virtio_ethdev.h
index e6d4533..df2cb7d 100644
--- a/drivers/net/virtio/virtio_ethdev.h
+++ b/drivers/net/virtio/virtio_ethdev.h
@@ -56,24 +56,15 @@
 #define VIRTIO_MAX_RX_PKTLEN  9728
 
 /* Features desired/implemented by this driver. */
-#define VTNET_FEATURES \
-	(VIRTIO_NET_F_MAC       | \
-	VIRTIO_NET_F_STATUS     | \
-	VIRTIO_NET_F_MQ         | \
-	VIRTIO_NET_F_CTRL_MAC_ADDR | \
-	VIRTIO_NET_F_CTRL_VQ    | \
-	VIRTIO_NET_F_CTRL_RX    | \
-	VIRTIO_NET_F_CTRL_VLAN  | \
-	VIRTIO_NET_F_CSUM       | \
-	VIRTIO_NET_F_HOST_TSO4  | \
-	VIRTIO_NET_F_HOST_TSO6  | \
-	VIRTIO_NET_F_HOST_ECN   | \
-	VIRTIO_NET_F_GUEST_CSUM | \
-	VIRTIO_NET_F_GUEST_TSO4 | \
-	VIRTIO_NET_F_GUEST_TSO6 | \
-	VIRTIO_NET_F_GUEST_ECN  | \
-	VIRTIO_NET_F_MRG_RXBUF  | \
-	VIRTIO_RING_F_INDIRECT_DESC)
+#define VIRTIO_PMD_GUEST_FEATURES		\
+	(1u << VIRTIO_NET_F_MAC		  |	\
+	 1u << VIRTIO_NET_F_STATUS	  |	\
+	 1u << VIRTIO_NET_F_MQ		  |	\
+	 1u << VIRTIO_NET_F_CTRL_MAC_ADDR |	\
+	 1u << VIRTIO_NET_F_CTRL_VQ	  |	\
+	 1u << VIRTIO_NET_F_CTRL_RX	  |	\
+	 1u << VIRTIO_NET_F_CTRL_VLAN	  |	\
+	 1u << VIRTIO_NET_F_MRG_RXBUF)
 
 /*
  * CQ function prototype
diff --git a/drivers/net/virtio/virtio_pci.h b/drivers/net/virtio/virtio_pci.h
index 64d9c34..47f722a 100644
--- a/drivers/net/virtio/virtio_pci.h
+++ b/drivers/net/virtio/virtio_pci.h
@@ -96,26 +96,6 @@ struct virtqueue;
 #define VIRTIO_CONFIG_STATUS_FAILED    0x80
 
 /*
- * Generate interrupt when the virtqueue ring is
- * completely used, even if we've suppressed them.
- */
-#define VIRTIO_F_NOTIFY_ON_EMPTY (1 << 24)
-
-/*
- * The guest should never negotiate this feature; it
- * is used to detect faulty drivers.
- */
-#define VIRTIO_F_BAD_FEATURE (1 << 30)
-
-/*
- * Some VirtIO feature bits (currently bits 28 through 31) are
- * reserved for the transport being used (eg. virtio_ring), the
- * rest are per-device feature bits.
- */
-#define VIRTIO_TRANSPORT_F_START 28
-#define VIRTIO_TRANSPORT_F_END   32
-
-/*
  * Each virtqueue indirect descriptor list must be physically contiguous.
  * To allow us to malloc(9) each list individually, limit the number
  * supported to what will fit in one page. With 4KB pages, this is a limit
@@ -128,33 +108,55 @@ struct virtqueue;
 #define VIRTIO_MAX_INDIRECT ((int) (PAGE_SIZE / 16))
 
 /* The feature bitmap for virtio net */
-#define VIRTIO_NET_F_CSUM       0x00001 /* Host handles pkts w/ partial csum */
-#define VIRTIO_NET_F_GUEST_CSUM 0x00002 /* Guest handles pkts w/ partial csum*/
-#define VIRTIO_NET_F_MAC        0x00020 /* Host has given MAC address. */
-#define VIRTIO_NET_F_GSO        0x00040 /* Host handles pkts w/ any GSO type */
-#define VIRTIO_NET_F_GUEST_TSO4 0x00080 /* Guest can handle TSOv4 in. */
-#define VIRTIO_NET_F_GUEST_TSO6 0x00100 /* Guest can handle TSOv6 in. */
-#define VIRTIO_NET_F_GUEST_ECN  0x00200 /* Guest can handle TSO[6] w/ ECN in.*/
-#define VIRTIO_NET_F_GUEST_UFO  0x00400 /* Guest can handle UFO in. */
-#define VIRTIO_NET_F_HOST_TSO4  0x00800 /* Host can handle TSOv4 in. */
-#define VIRTIO_NET_F_HOST_TSO6  0x01000 /* Host can handle TSOv6 in. */
-#define VIRTIO_NET_F_HOST_ECN   0x02000 /* Host can handle TSO[6] w/ ECN in. */
-#define VIRTIO_NET_F_HOST_UFO   0x04000 /* Host can handle UFO in. */
-#define VIRTIO_NET_F_MRG_RXBUF  0x08000 /* Host can merge receive buffers. */
-#define VIRTIO_NET_F_STATUS     0x10000 /* virtio_net_config.status available*/
-#define VIRTIO_NET_F_CTRL_VQ    0x20000 /* Control channel available */
-#define VIRTIO_NET_F_CTRL_RX    0x40000 /* Control channel RX mode support */
-#define VIRTIO_NET_F_CTRL_VLAN  0x80000 /* Control channel VLAN filtering */
-#define VIRTIO_NET_F_CTRL_RX_EXTRA  0x100000 /* Extra RX mode control support */
-#define VIRTIO_RING_F_INDIRECT_DESC 0x10000000 /* Support for indirect buffer descriptors. */
-/* The guest publishes the used index for which it expects an interrupt
- * at the end of the avail ring. Host should ignore the avail->flags field.
- * The host publishes the avail index for which it expects a kick
- * at the end of the used ring. Guest should ignore the used->flags field.
+#define VIRTIO_NET_F_CSUM	0	/* Host handles pkts w/ partial csum */
+#define VIRTIO_NET_F_GUEST_CSUM	1	/* Guest handles pkts w/ partial csum */
+#define VIRTIO_NET_F_MAC	5	/* Host has given MAC address. */
+#define VIRTIO_NET_F_GUEST_TSO4	7	/* Guest can handle TSOv4 in. */
+#define VIRTIO_NET_F_GUEST_TSO6	8	/* Guest can handle TSOv6 in. */
+#define VIRTIO_NET_F_GUEST_ECN	9	/* Guest can handle TSO[6] w/ ECN in. */
+#define VIRTIO_NET_F_GUEST_UFO	10	/* Guest can handle UFO in. */
+#define VIRTIO_NET_F_HOST_TSO4	11	/* Host can handle TSOv4 in. */
+#define VIRTIO_NET_F_HOST_TSO6	12	/* Host can handle TSOv6 in. */
+#define VIRTIO_NET_F_HOST_ECN	13	/* Host can handle TSO[6] w/ ECN in. */
+#define VIRTIO_NET_F_HOST_UFO	14	/* Host can handle UFO in. */
+#define VIRTIO_NET_F_MRG_RXBUF	15	/* Host can merge receive buffers. */
+#define VIRTIO_NET_F_STATUS	16	/* virtio_net_config.status available */
+#define VIRTIO_NET_F_CTRL_VQ	17	/* Control channel available */
+#define VIRTIO_NET_F_CTRL_RX	18	/* Control channel RX mode support */
+#define VIRTIO_NET_F_CTRL_VLAN	19	/* Control channel VLAN filtering */
+#define VIRTIO_NET_F_CTRL_RX_EXTRA 20	/* Extra RX mode control support */
+#define VIRTIO_NET_F_GUEST_ANNOUNCE 21	/* Guest can announce device on the
+					 * network */
+#define VIRTIO_NET_F_MQ		22	/* Device supports Receive Flow
+					 * Steering */
+#define VIRTIO_NET_F_CTRL_MAC_ADDR 23	/* Set MAC address */
+
+/* Do we get callbacks when the ring is completely used, even if we've
+ * suppressed them? */
+#define VIRTIO_F_NOTIFY_ON_EMPTY	24
+
+/* Can the device handle any descriptor layout? */
+#define VIRTIO_F_ANY_LAYOUT		27
+
+/* We support indirect buffer descriptors */
+#define VIRTIO_RING_F_INDIRECT_DESC	28
+
+/*
+ * Some VirtIO feature bits (currently bits 28 through 31) are
+ * reserved for the transport being used (eg. virtio_ring), the
+ * rest are per-device feature bits.
  */
-#define VIRTIO_RING_F_EVENT_IDX 0x20000000
+#define VIRTIO_TRANSPORT_F_START 28
+#define VIRTIO_TRANSPORT_F_END   32
+
+/* The Guest publishes the used index for which it expects an interrupt
+ * at the end of the avail ring. Host should ignore the avail->flags field. */
+/* The Host publishes the avail index for which it expects a kick
+ * at the end of the used ring. Guest should ignore the used->flags field. */
+#define VIRTIO_RING_F_EVENT_IDX		29
 
-#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
+#define VIRTIO_NET_S_LINK_UP	1	/* Link is up */
+#define VIRTIO_NET_S_ANNOUNCE	2	/* Announcement is needed */
 
 /*
  * Maximum number of virtqueues per device.
@@ -243,9 +245,9 @@ outl_p(unsigned int data, unsigned int port)
 	outl_p((unsigned int)(value), (VIRTIO_PCI_REG_ADDR((hw), (reg))))
 
 static inline int
-vtpci_with_feature(struct virtio_hw *hw, uint32_t feature)
+vtpci_with_feature(struct virtio_hw *hw, uint32_t bit)
 {
-	return (hw->guest_features & feature) != 0;
+	return (hw->guest_features & (1u << bit)) != 0;
 }
 
 /*
diff --git a/drivers/net/virtio/virtqueue.h b/drivers/net/virtio/virtqueue.h
index 9d6079e..7789411 100644
--- a/drivers/net/virtio/virtqueue.h
+++ b/drivers/net/virtio/virtqueue.h
@@ -202,18 +202,12 @@ struct virtqueue {
 };
 
 /* If multiqueue is provided by host, then we suppport it. */
-#ifndef VIRTIO_NET_F_MQ
-/* Device supports Receive Flow Steering */
-#define VIRTIO_NET_F_MQ 0x400000
 #define VIRTIO_NET_CTRL_MQ   4
 #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET        0
 #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN        1
 #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX        0x8000
-#endif
-#ifndef VIRTIO_NET_F_CTRL_MAC_ADDR
-#define VIRTIO_NET_F_CTRL_MAC_ADDR 0x800000
+
 #define VIRTIO_NET_CTRL_MAC_ADDR_SET         1
-#endif
 
 /**
  * This is the first element of the scatter-gather list.  If you don't
-- 
2.1.4

Re: [dpdk-dev] [PATCH 4/5] virtio: clarify feature bit handling

[Ouyang, Changchun]

> -----Original Message-----
> From: Stephen Hemminger [mailto:stephen@networkplumber.org]
> Sent: Thursday, June 11, 2015 11:53 PM
> To: Ouyang, Changchun
> Cc: dev@dpdk.org; Stephen Hemminger; Stephen Hemminger
> Subject: [PATCH 4/5] virtio: clarify feature bit handling
> 
> From: Stephen Hemminger <shemming@brocade.com>
> 
> Change the features from bit mask to bit number. This allows the DPDK
> driver to use the definitions from Linux (yes the header files already use a
> license compatiable with DPDK). This makes DPDK driver handle future
> feature bit changes.
> 
> Get rid of double negative code in the feature bit intialization.
> Instead just have a new define with the list of feature bits implemented.
> 
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

Acked-by: Changchun Ouyang<changchun.ouyang@intel.com>

[dpdk-dev] [PATCH 5/5] virtio: fix ring size negotiation

[Stephen Hemminger]

From: Stephen Hemminger <shemming@brocade.com>

Negotate the virtio ring size. The host may allow for very large
rings but application may only want a smaller ring.
Conversely, if the number of descriptors requested exceeds the virtio
host queue size, then just silently use the smaller host size.

This fixes issues with virtio in non-QEMU envirionments.
For example Google Compute Engine allows up to 16K elements
in ring.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/net/virtio/virtio_ethdev.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 2afa371..befd0bc 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -267,13 +267,21 @@ int virtio_dev_queue_setup(struct rte_eth_dev *dev,
 	if (vq_size == 0) {
 		PMD_INIT_LOG(ERR, "%s: virtqueue does not exist", __func__);
 		return -EINVAL;
-	} else if (!rte_is_power_of_2(vq_size)) {
+	}
+
+	if (!rte_is_power_of_2(vq_size)) {
 		PMD_INIT_LOG(ERR, "%s: virtqueue size is not powerof 2", __func__);
 		return -EINVAL;
-	} else if (nb_desc != vq_size) {
-		PMD_INIT_LOG(ERR, "Warning: nb_desc(%d) is not equal to vq size (%d), fall to vq size",
-			nb_desc, vq_size);
-		nb_desc = vq_size;
+	}
+
+	if (nb_desc < vq_size) {
+		if (!rte_is_power_of_2(nb_desc)) {
+			PMD_INIT_LOG(ERR,
+				     "nb_desc(%u) size is not powerof 2",
+				     nb_desc);
+			return -EINVAL;
+		}
+		vq_size = nb_desc;
 	}
 
 	if (queue_type == VTNET_RQ) {
-- 
2.1.4

Re: [dpdk-dev] [PATCH 5/5] virtio: fix ring size negotiation

[Ouyang, Changchun]

> -----Original Message-----
> From: Stephen Hemminger [mailto:stephen@networkplumber.org]
> Sent: Thursday, June 11, 2015 11:53 PM
> To: Ouyang, Changchun
> Cc: dev@dpdk.org; Stephen Hemminger; Stephen Hemminger
> Subject: [PATCH 5/5] virtio: fix ring size negotiation
> 
> From: Stephen Hemminger <shemming@brocade.com>
> 
> Negotate the virtio ring size. The host may allow for very large rings but
> application may only want a smaller ring.
> Conversely, if the number of descriptors requested exceeds the virtio host
> queue size, then just silently use the smaller host size.
> 
> This fixes issues with virtio in non-QEMU envirionments.
> For example Google Compute Engine allows up to 16K elements in ring.
> 
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

Acked-by: Changchun Ouyang<changchun.ouyang@intel.com>

Re: [dpdk-dev] [PATCH 0/5 v3] virtio: patches

[Thomas Monjalon]

2015-06-11 08:53, Stephen Hemminger:
> This is update to earlier virtio patches, the only change is to
> handle the rename to drivers/net
> 
> Stephen Hemminger (5):
>   virtio: remove blank lines
>   virtio: don't enable/disable rx modes unless supported
>   virtio: don't set mac table unless negotiated
>   virtio: clarify feature bit handling
>   virtio: fix ring size negotiation

Applied, thanks