From 6778948f9de86c3cfaf36725a7c87dcff9ba247f Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 08:20:59 +0000
Subject: [PATCH] kernel_5.10 no rt
---
kernel/drivers/net/ethernet/intel/igb/igb.h | 95 ++++++++++++++++++++++++++++++++++++++++++-----
1 files changed, 85 insertions(+), 10 deletions(-)
diff --git a/kernel/drivers/net/ethernet/intel/igb/igb.h b/kernel/drivers/net/ethernet/intel/igb/igb.h
index ca54e26..e6d2800 100644
--- a/kernel/drivers/net/ethernet/intel/igb/igb.h
+++ b/kernel/drivers/net/ethernet/intel/igb/igb.h
@@ -19,6 +19,8 @@
#include <linux/pci.h>
#include <linux/mdio.h>
+#include <net/xdp.h>
+
struct igb_adapter;
#define E1000_PCS_CFG_IGN_SD 1
@@ -79,6 +81,12 @@
#define IGB_I210_RX_LATENCY_100 2213
#define IGB_I210_RX_LATENCY_1000 448
+/* XDP */
+#define IGB_XDP_PASS 0
+#define IGB_XDP_CONSUMED BIT(0)
+#define IGB_XDP_TX BIT(1)
+#define IGB_XDP_REDIR BIT(2)
+
struct vf_data_storage {
unsigned char vf_mac_addresses[ETH_ALEN];
u16 vf_mc_hashes[IGB_MAX_VF_MC_ENTRIES];
@@ -130,19 +138,66 @@
/* this is the size past which hardware will drop packets when setting LPE=0 */
#define MAXIMUM_ETHERNET_VLAN_SIZE 1522
+#define IGB_ETH_PKT_HDR_PAD (ETH_HLEN + ETH_FCS_LEN + (VLAN_HLEN * 2))
+
/* Supported Rx Buffer Sizes */
#define IGB_RXBUFFER_256 256
+#define IGB_RXBUFFER_1536 1536
#define IGB_RXBUFFER_2048 2048
#define IGB_RXBUFFER_3072 3072
#define IGB_RX_HDR_LEN IGB_RXBUFFER_256
#define IGB_TS_HDR_LEN 16
-#define IGB_SKB_PAD (NET_SKB_PAD + NET_IP_ALIGN)
+/* Attempt to maximize the headroom available for incoming frames. We
+ * use a 2K buffer for receives and need 1536/1534 to store the data for
+ * the frame. This leaves us with 512 bytes of room. From that we need
+ * to deduct the space needed for the shared info and the padding needed
+ * to IP align the frame.
+ *
+ * Note: For cache line sizes 256 or larger this value is going to end
+ * up negative. In these cases we should fall back to the 3K
+ * buffers.
+ */
#if (PAGE_SIZE < 8192)
-#define IGB_MAX_FRAME_BUILD_SKB \
- (SKB_WITH_OVERHEAD(IGB_RXBUFFER_2048) - IGB_SKB_PAD - IGB_TS_HDR_LEN)
+#define IGB_MAX_FRAME_BUILD_SKB (IGB_RXBUFFER_1536 - NET_IP_ALIGN)
+#define IGB_2K_TOO_SMALL_WITH_PADDING \
+((NET_SKB_PAD + IGB_TS_HDR_LEN + IGB_RXBUFFER_1536) > SKB_WITH_OVERHEAD(IGB_RXBUFFER_2048))
+
+static inline int igb_compute_pad(int rx_buf_len)
+{
+ int page_size, pad_size;
+
+ page_size = ALIGN(rx_buf_len, PAGE_SIZE / 2);
+ pad_size = SKB_WITH_OVERHEAD(page_size) - rx_buf_len;
+
+ return pad_size;
+}
+
+static inline int igb_skb_pad(void)
+{
+ int rx_buf_len;
+
+ /* If a 2K buffer cannot handle a standard Ethernet frame then
+ * optimize padding for a 3K buffer instead of a 1.5K buffer.
+ *
+ * For a 3K buffer we need to add enough padding to allow for
+ * tailroom due to NET_IP_ALIGN possibly shifting us out of
+ * cache-line alignment.
+ */
+ if (IGB_2K_TOO_SMALL_WITH_PADDING)
+ rx_buf_len = IGB_RXBUFFER_3072 + SKB_DATA_ALIGN(NET_IP_ALIGN);
+ else
+ rx_buf_len = IGB_RXBUFFER_1536;
+
+ /* if needed make room for NET_IP_ALIGN */
+ rx_buf_len -= NET_IP_ALIGN;
+
+ return igb_compute_pad(rx_buf_len);
+}
+
+#define IGB_SKB_PAD igb_skb_pad()
#else
-#define IGB_MAX_FRAME_BUILD_SKB (IGB_RXBUFFER_2048 - IGB_TS_HDR_LEN)
+#define IGB_SKB_PAD (NET_SKB_PAD + NET_IP_ALIGN)
#endif
/* How many Rx Buffers do we bundle into one write to the hardware ? */
@@ -194,13 +249,25 @@
#define IGB_SFF_ADDRESSING_MODE 0x4
#define IGB_SFF_8472_UNSUP 0x00
+/* TX resources are shared between XDP and netstack
+ * and we need to tag the buffer type to distinguish them
+ */
+enum igb_tx_buf_type {
+ IGB_TYPE_SKB = 0,
+ IGB_TYPE_XDP,
+};
+
/* wrapper around a pointer to a socket buffer,
* so a DMA handle can be stored along with the buffer
*/
struct igb_tx_buffer {
union e1000_adv_tx_desc *next_to_watch;
unsigned long time_stamp;
- struct sk_buff *skb;
+ enum igb_tx_buf_type type;
+ union {
+ struct sk_buff *skb;
+ struct xdp_frame *xdpf;
+ };
unsigned int bytecount;
u16 gso_segs;
__be16 protocol;
@@ -248,6 +315,7 @@
struct igb_ring {
struct igb_q_vector *q_vector; /* backlink to q_vector */
struct net_device *netdev; /* back pointer to net_device */
+ struct bpf_prog *xdp_prog;
struct device *dev; /* device pointer for dma mapping */
union { /* array of buffer info structs */
struct igb_tx_buffer *tx_buffer_info;
@@ -288,6 +356,7 @@
struct u64_stats_sync rx_syncp;
};
};
+ struct xdp_rxq_info xdp_rxq;
} ____cacheline_internodealigned_in_smp;
struct igb_q_vector {
@@ -306,7 +375,7 @@
char name[IFNAMSIZ + 9];
/* for dynamic allocation of rings associated with this q_vector */
- struct igb_ring ring[0] ____cacheline_internodealigned_in_smp;
+ struct igb_ring ring[] ____cacheline_internodealigned_in_smp;
};
enum e1000_ring_flags_t {
@@ -339,7 +408,7 @@
return IGB_RXBUFFER_3072;
if (ring_uses_build_skb(ring))
- return IGB_MAX_FRAME_BUILD_SKB + IGB_TS_HDR_LEN;
+ return IGB_MAX_FRAME_BUILD_SKB;
#endif
return IGB_RXBUFFER_2048;
}
@@ -467,6 +536,7 @@
unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
struct net_device *netdev;
+ struct bpf_prog *xdp_prog;
unsigned long state;
unsigned int flags;
@@ -594,6 +664,8 @@
struct igb_mac_addr *mac_table;
struct vf_mac_filter vf_macs;
struct vf_mac_filter *vf_mac_list;
+ /* lock for VF resources */
+ spinlock_t vfs_lock;
};
/* flags controlling PTP/1588 function */
@@ -642,8 +714,10 @@
};
extern char igb_driver_name[];
-extern char igb_driver_version[];
+int igb_xmit_xdp_ring(struct igb_adapter *adapter,
+ struct igb_ring *ring,
+ struct xdp_frame *xdpf);
int igb_open(struct net_device *netdev);
int igb_close(struct net_device *netdev);
int igb_up(struct igb_adapter *);
@@ -661,6 +735,7 @@
void igb_configure_rx_ring(struct igb_adapter *, struct igb_ring *);
void igb_setup_tctl(struct igb_adapter *);
void igb_setup_rctl(struct igb_adapter *);
+void igb_setup_srrctl(struct igb_adapter *, struct igb_ring *);
netdev_tx_t igb_xmit_frame_ring(struct sk_buff *, struct igb_ring *);
void igb_alloc_rx_buffers(struct igb_ring *, u16);
void igb_update_stats(struct igb_adapter *);
@@ -675,8 +750,8 @@
void igb_ptp_rx_hang(struct igb_adapter *adapter);
void igb_ptp_tx_hang(struct igb_adapter *adapter);
void igb_ptp_rx_rgtstamp(struct igb_q_vector *q_vector, struct sk_buff *skb);
-void igb_ptp_rx_pktstamp(struct igb_q_vector *q_vector, void *va,
- struct sk_buff *skb);
+int igb_ptp_rx_pktstamp(struct igb_q_vector *q_vector, void *va,
+ struct sk_buff *skb);
int igb_ptp_set_ts_config(struct net_device *netdev, struct ifreq *ifr);
int igb_ptp_get_ts_config(struct net_device *netdev, struct ifreq *ifr);
void igb_set_flag_queue_pairs(struct igb_adapter *, const u32);
--
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