From: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Date: Tue, 2 Feb 2016 13:48:16 +0000 (+0800)
Subject: virtio: switch to 64 bit features
X-Git-Tag: spdx-start~7660
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=3891f233f76270e00e45addf221bc280c585a1d9;p=dpdk.git

virtio: switch to 64 bit features

Switch to 64 bit features, which virtio 1.0 supports.

While legacy virtio only supports 32 bit features, it complains aloud
and quit when trying to setting > 32 bit features.

Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Tested-by: Qian Xu <qian.q.xu@intel.com>
Reviewed-by: Tetsuya Mukawa <mukawa@igel.co.jp>
Tested-by: Tetsuya Mukawa <mukawa@igel.co.jp>
Acked-by: Huawei Xie <huawei.xie@intel.com>
---

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index b57224dc2a..4f8475785a 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -930,16 +930,16 @@ 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;
+	uint64_t host_features;
 
 	/* Prepare guest_features: feature that driver wants to support */
 	hw->guest_features = VIRTIO_PMD_GUEST_FEATURES;
-	PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %x",
+	PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
 		hw->guest_features);
 
 	/* Read device(host) feature bits */
 	host_features = hw->vtpci_ops->get_features(hw);
-	PMD_INIT_LOG(DEBUG, "host_features before negotiate = %x",
+	PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
 		host_features);
 
 	/*
@@ -947,7 +947,7 @@ virtio_negotiate_features(struct virtio_hw *hw)
 	 * guest feature bits.
 	 */
 	hw->guest_features = vtpci_negotiate_features(hw, host_features);
-	PMD_INIT_LOG(DEBUG, "features after negotiate = %x",
+	PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
 		hw->guest_features);
 }
 
diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c
index e89a044d91..39610775d6 100644
--- a/drivers/net/virtio/virtio_pci.c
+++ b/drivers/net/virtio/virtio_pci.c
@@ -87,15 +87,20 @@ legacy_write_dev_config(struct virtio_hw *hw, size_t offset,
 	}
 }
 
-static uint32_t
+static uint64_t
 legacy_get_features(struct virtio_hw *hw)
 {
 	return VIRTIO_READ_REG_4(hw, VIRTIO_PCI_HOST_FEATURES);
 }
 
 static void
-legacy_set_features(struct virtio_hw *hw, uint32_t features)
+legacy_set_features(struct virtio_hw *hw, uint64_t features)
 {
+	if ((features >> 32) != 0) {
+		PMD_DRV_LOG(ERR,
+			"only 32 bit features are allowed for legacy virtio!");
+		return;
+	}
 	VIRTIO_WRITE_REG_4(hw, VIRTIO_PCI_GUEST_FEATURES, features);
 }
 
@@ -453,10 +458,10 @@ vtpci_write_dev_config(struct virtio_hw *hw, size_t offset,
 	hw->vtpci_ops->write_dev_cfg(hw, offset, src, length);
 }
 
-uint32_t
-vtpci_negotiate_features(struct virtio_hw *hw, uint32_t host_features)
+uint64_t
+vtpci_negotiate_features(struct virtio_hw *hw, uint64_t host_features)
 {
-	uint32_t features;
+	uint64_t features;
 
 	/*
 	 * Limit negotiated features to what the driver, virtqueue, and
diff --git a/drivers/net/virtio/virtio_pci.h b/drivers/net/virtio/virtio_pci.h
index e8e7509d1d..d7bc6bb033 100644
--- a/drivers/net/virtio/virtio_pci.h
+++ b/drivers/net/virtio/virtio_pci.h
@@ -175,8 +175,8 @@ struct virtio_pci_ops {
 	uint8_t (*get_status)(struct virtio_hw *hw);
 	void    (*set_status)(struct virtio_hw *hw, uint8_t status);
 
-	uint32_t (*get_features)(struct virtio_hw *hw);
-	void     (*set_features)(struct virtio_hw *hw, uint32_t features);
+	uint64_t (*get_features)(struct virtio_hw *hw);
+	void     (*set_features)(struct virtio_hw *hw, uint64_t features);
 
 	uint8_t (*get_isr)(struct virtio_hw *hw);
 
@@ -191,7 +191,7 @@ struct virtio_pci_ops {
 struct virtio_hw {
 	struct virtqueue *cvq;
 	uint32_t    io_base;
-	uint32_t    guest_features;
+	uint64_t    guest_features;
 	uint32_t    max_tx_queues;
 	uint32_t    max_rx_queues;
 	uint16_t    vtnet_hdr_size;
@@ -271,9 +271,9 @@ 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 bit)
+vtpci_with_feature(struct virtio_hw *hw, uint64_t bit)
 {
-	return (hw->guest_features & (1u << bit)) != 0;
+	return (hw->guest_features & (1ULL << bit)) != 0;
 }
 
 /*
@@ -286,7 +286,7 @@ void vtpci_reinit_complete(struct virtio_hw *);
 
 void vtpci_set_status(struct virtio_hw *, uint8_t);
 
-uint32_t vtpci_negotiate_features(struct virtio_hw *, uint32_t);
+uint64_t vtpci_negotiate_features(struct virtio_hw *, uint64_t);
 
 void vtpci_write_dev_config(struct virtio_hw *, size_t, const void *, int);