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path: root/drivers/net/hyperv/netvsc_drv.c
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Diffstat (limited to 'drivers/net/hyperv/netvsc_drv.c')
-rw-r--r--drivers/net/hyperv/netvsc_drv.c74
1 files changed, 35 insertions, 39 deletions
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 5129647d420c..dc70de674ca9 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -35,6 +35,7 @@
#include <linux/slab.h>
#include <linux/rtnetlink.h>
#include <linux/netpoll.h>
+#include <linux/reciprocal_div.h>
#include <net/arp.h>
#include <net/route.h>
@@ -54,9 +55,11 @@
#define LINKCHANGE_INT (2 * HZ)
#define VF_TAKEOVER_INT (HZ / 10)
-static int ring_size = 128;
-module_param(ring_size, int, S_IRUGO);
+static unsigned int ring_size __ro_after_init = 128;
+module_param(ring_size, uint, S_IRUGO);
MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)");
+unsigned int netvsc_ring_bytes __ro_after_init;
+struct reciprocal_value netvsc_ring_reciprocal __ro_after_init;
static const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
NETIF_MSG_LINK | NETIF_MSG_IFUP |
@@ -174,17 +177,15 @@ out:
return ret;
}
-static void *init_ppi_data(struct rndis_message *msg, u32 ppi_size,
- int pkt_type)
+static inline void *init_ppi_data(struct rndis_message *msg,
+ u32 ppi_size, u32 pkt_type)
{
- struct rndis_packet *rndis_pkt;
+ struct rndis_packet *rndis_pkt = &msg->msg.pkt;
struct rndis_per_packet_info *ppi;
- rndis_pkt = &msg->msg.pkt;
rndis_pkt->data_offset += ppi_size;
-
- ppi = (struct rndis_per_packet_info *)((void *)rndis_pkt +
- rndis_pkt->per_pkt_info_offset + rndis_pkt->per_pkt_info_len);
+ ppi = (void *)rndis_pkt + rndis_pkt->per_pkt_info_offset
+ + rndis_pkt->per_pkt_info_len;
ppi->size = ppi_size;
ppi->type = pkt_type;
@@ -192,7 +193,7 @@ static void *init_ppi_data(struct rndis_message *msg, u32 ppi_size,
rndis_pkt->per_pkt_info_len += ppi_size;
- return ppi;
+ return ppi + 1;
}
/* Azure hosts don't support non-TCP port numbers in hashing for fragmented
@@ -469,10 +470,8 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
int ret;
unsigned int num_data_pgs;
struct rndis_message *rndis_msg;
- struct rndis_packet *rndis_pkt;
struct net_device *vf_netdev;
u32 rndis_msg_size;
- struct rndis_per_packet_info *ppi;
u32 hash;
struct hv_page_buffer pb[MAX_PAGE_BUFFER_COUNT];
@@ -527,34 +526,36 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
rndis_msg = (struct rndis_message *)skb->head;
- memset(rndis_msg, 0, RNDIS_AND_PPI_SIZE);
-
/* Add the rndis header */
rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET;
rndis_msg->msg_len = packet->total_data_buflen;
- rndis_pkt = &rndis_msg->msg.pkt;
- rndis_pkt->data_offset = sizeof(struct rndis_packet);
- rndis_pkt->data_len = packet->total_data_buflen;
- rndis_pkt->per_pkt_info_offset = sizeof(struct rndis_packet);
+
+ rndis_msg->msg.pkt = (struct rndis_packet) {
+ .data_offset = sizeof(struct rndis_packet),
+ .data_len = packet->total_data_buflen,
+ .per_pkt_info_offset = sizeof(struct rndis_packet),
+ };
rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet);
hash = skb_get_hash_raw(skb);
if (hash != 0 && net->real_num_tx_queues > 1) {
+ u32 *hash_info;
+
rndis_msg_size += NDIS_HASH_PPI_SIZE;
- ppi = init_ppi_data(rndis_msg, NDIS_HASH_PPI_SIZE,
- NBL_HASH_VALUE);
- *(u32 *)((void *)ppi + ppi->ppi_offset) = hash;
+ hash_info = init_ppi_data(rndis_msg, NDIS_HASH_PPI_SIZE,
+ NBL_HASH_VALUE);
+ *hash_info = hash;
}
if (skb_vlan_tag_present(skb)) {
struct ndis_pkt_8021q_info *vlan;
rndis_msg_size += NDIS_VLAN_PPI_SIZE;
- ppi = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE,
- IEEE_8021Q_INFO);
+ vlan = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE,
+ IEEE_8021Q_INFO);
- vlan = (void *)ppi + ppi->ppi_offset;
+ vlan->value = 0;
vlan->vlanid = skb->vlan_tci & VLAN_VID_MASK;
vlan->pri = (skb->vlan_tci & VLAN_PRIO_MASK) >>
VLAN_PRIO_SHIFT;
@@ -564,11 +565,10 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
struct ndis_tcp_lso_info *lso_info;
rndis_msg_size += NDIS_LSO_PPI_SIZE;
- ppi = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE,
- TCP_LARGESEND_PKTINFO);
-
- lso_info = (void *)ppi + ppi->ppi_offset;
+ lso_info = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE,
+ TCP_LARGESEND_PKTINFO);
+ lso_info->value = 0;
lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE;
if (skb->protocol == htons(ETH_P_IP)) {
lso_info->lso_v2_transmit.ip_version =
@@ -593,12 +593,10 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
struct ndis_tcp_ip_checksum_info *csum_info;
rndis_msg_size += NDIS_CSUM_PPI_SIZE;
- ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE,
- TCPIP_CHKSUM_PKTINFO);
-
- csum_info = (struct ndis_tcp_ip_checksum_info *)((void *)ppi +
- ppi->ppi_offset);
+ csum_info = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE,
+ TCPIP_CHKSUM_PKTINFO);
+ csum_info->value = 0;
csum_info->transmit.tcp_header_offset = skb_transport_offset(skb);
if (skb->protocol == htons(ETH_P_IP)) {
@@ -860,7 +858,6 @@ static int netvsc_set_channels(struct net_device *net,
memset(&device_info, 0, sizeof(device_info));
device_info.num_chn = count;
- device_info.ring_size = ring_size;
device_info.send_sections = nvdev->send_section_cnt;
device_info.send_section_size = nvdev->send_section_size;
device_info.recv_sections = nvdev->recv_section_cnt;
@@ -975,7 +972,6 @@ static int netvsc_change_mtu(struct net_device *ndev, int mtu)
rndis_filter_close(nvdev);
memset(&device_info, 0, sizeof(device_info));
- device_info.ring_size = ring_size;
device_info.num_chn = nvdev->num_chn;
device_info.send_sections = nvdev->send_section_cnt;
device_info.send_section_size = nvdev->send_section_size;
@@ -1539,7 +1535,6 @@ static int netvsc_set_ringparam(struct net_device *ndev,
memset(&device_info, 0, sizeof(device_info));
device_info.num_chn = nvdev->num_chn;
- device_info.ring_size = ring_size;
device_info.send_sections = new_tx;
device_info.send_section_size = nvdev->send_section_size;
device_info.recv_sections = new_rx;
@@ -1995,7 +1990,6 @@ static int netvsc_probe(struct hv_device *dev,
/* Notify the netvsc driver of the new device */
memset(&device_info, 0, sizeof(device_info));
- device_info.ring_size = ring_size;
device_info.num_chn = VRSS_CHANNEL_DEFAULT;
device_info.send_sections = NETVSC_DEFAULT_TX;
device_info.send_section_size = NETVSC_SEND_SECTION_SIZE;
@@ -2158,11 +2152,13 @@ static int __init netvsc_drv_init(void)
if (ring_size < RING_SIZE_MIN) {
ring_size = RING_SIZE_MIN;
- pr_info("Increased ring_size to %d (min allowed)\n",
+ pr_info("Increased ring_size to %u (min allowed)\n",
ring_size);
}
- ret = vmbus_driver_register(&netvsc_drv);
+ netvsc_ring_bytes = ring_size * PAGE_SIZE;
+ netvsc_ring_reciprocal = reciprocal_value(netvsc_ring_bytes);
+ ret = vmbus_driver_register(&netvsc_drv);
if (ret)
return ret;
generated by cgit v1.2.3-70-g09d2 (git 2.48.1) at 2025-09-23 13:58:45 +0000