net/mana: add support to update MTU
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Commit Message
From: Long Li <longli@microsoft.com>
Add support for updating MTU for MANA. MTU is updated in kernel through
socket interface.
Signed-off-by: Long Li <longli@microsoft.com>
---
doc/guides/nics/features/mana.ini | 1 +
drivers/net/mana/mana.c | 96 ++++++++++++++++++++++++++++++-
drivers/net/mana/mana.h | 2 +-
3 files changed, 96 insertions(+), 3 deletions(-)
Comments
On 7/25/2023 10:16 PM, longli@linuxonhyperv.com wrote:
> From: Long Li <longli@microsoft.com>
>
> Add support for updating MTU for MANA. MTU is updated in kernel through
> socket interface.
>
> Signed-off-by: Long Li <longli@microsoft.com>
>
Applied to dpdk-next-net/main, thanks.
@@ -13,6 +13,7 @@ RSS hash = Y
L3 checksum offload = Y
L4 checksum offload = Y
Basic stats = Y
+MTU update = Y
Multiprocess aware = Y
Linux = Y
x86-64 = Y
@@ -6,6 +6,8 @@
#include <dirent.h>
#include <fcntl.h>
#include <sys/mman.h>
+#include <sys/ioctl.h>
+#include <net/if.h>
#include <ethdev_driver.h>
#include <ethdev_pci.h>
@@ -286,11 +288,12 @@ mana_dev_info_get(struct rte_eth_dev *dev,
{
struct mana_priv *priv = dev->data->dev_private;
- dev_info->max_mtu = RTE_ETHER_MTU;
+ dev_info->min_mtu = RTE_ETHER_MIN_MTU;
+ dev_info->max_mtu = MANA_MAX_MTU;
/* RX params */
dev_info->min_rx_bufsize = MIN_RX_BUF_SIZE;
- dev_info->max_rx_pktlen = MAX_FRAME_SIZE;
+ dev_info->max_rx_pktlen = MANA_MAX_MTU + RTE_ETHER_HDR_LEN;
dev_info->max_rx_queues = priv->max_rx_queues;
dev_info->max_tx_queues = priv->max_tx_queues;
@@ -700,6 +703,94 @@ mana_dev_stats_reset(struct rte_eth_dev *dev __rte_unused)
return 0;
}
+static int
+mana_get_ifname(const struct mana_priv *priv, char (*ifname)[IF_NAMESIZE])
+{
+ int ret;
+ DIR *dir;
+ struct dirent *dent;
+
+ MANA_MKSTR(dirpath, "%s/device/net", priv->ib_ctx->device->ibdev_path);
+
+ dir = opendir(dirpath);
+ if (dir == NULL)
+ return -ENODEV;
+
+ while ((dent = readdir(dir)) != NULL) {
+ char *name = dent->d_name;
+ FILE *file;
+ struct rte_ether_addr addr;
+ char *mac = NULL;
+
+ if ((name[0] == '.') &&
+ ((name[1] == '\0') ||
+ ((name[1] == '.') && (name[2] == '\0'))))
+ continue;
+
+ MANA_MKSTR(path, "%s/%s/address", dirpath, name);
+
+ file = fopen(path, "r");
+ if (!file) {
+ ret = -ENODEV;
+ break;
+ }
+
+ ret = fscanf(file, "%ms", &mac);
+ fclose(file);
+
+ if (ret <= 0) {
+ ret = -EINVAL;
+ break;
+ }
+
+ ret = rte_ether_unformat_addr(mac, &addr);
+ free(mac);
+ if (ret)
+ break;
+
+ if (rte_is_same_ether_addr(&addr, priv->dev_data->mac_addrs)) {
+ strlcpy(*ifname, name, sizeof(*ifname));
+ ret = 0;
+ break;
+ }
+ }
+
+ closedir(dir);
+ return ret;
+}
+
+static int
+mana_ifreq(const struct mana_priv *priv, int req, struct ifreq *ifr)
+{
+ int sock, ret;
+
+ sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
+ if (sock == -1)
+ return -errno;
+
+ ret = mana_get_ifname(priv, &ifr->ifr_name);
+ if (ret) {
+ close(sock);
+ return ret;
+ }
+
+ if (ioctl(sock, req, ifr) == -1)
+ ret = -errno;
+
+ close(sock);
+
+ return ret;
+}
+
+static int
+mana_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
+{
+ struct mana_priv *priv = dev->data->dev_private;
+ struct ifreq request = { .ifr_mtu = mtu, };
+
+ return mana_ifreq(priv, SIOCSIFMTU, &request);
+}
+
static const struct eth_dev_ops mana_dev_ops = {
.dev_configure = mana_dev_configure,
.dev_start = mana_dev_start,
@@ -720,6 +811,7 @@ static const struct eth_dev_ops mana_dev_ops = {
.link_update = mana_dev_link_update,
.stats_get = mana_dev_stats_get,
.stats_reset = mana_dev_stats_reset,
+ .mtu_set = mana_mtu_set,
};
static const struct eth_dev_ops mana_dev_secondary_ops = {
@@ -16,8 +16,8 @@ struct mana_shared_data {
unsigned int secondary_cnt;
};
+#define MANA_MAX_MTU 9000
#define MIN_RX_BUF_SIZE 1024
-#define MAX_FRAME_SIZE RTE_ETHER_MAX_LEN
#define MANA_MAX_MAC_ADDR 1
#define MANA_DEV_RX_OFFLOAD_SUPPORT ( \