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linux_dsm_epyc7002/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h
Alexander Duyck 4be87727d4 ixgbevf: Fix coexistence of malicious driver detection with XDP 
In the case of the VF driver it is supposed to provide a context descriptor
that allows us to provide information about the header offsets inside of
the frame. However in the case of XDP we don't really have any of that
information since the data is minimally processed. As a result we were
seeing malicious driver detection (MDD) events being triggered when the PF
had that functionality enabled.

To address this I have added a bit of new code that will "prime" the XDP
ring by providing one context descriptor that assumes the minimal setup of
an Ethernet frame which is an L2 header length of 14. With just that we can
provide enough information to make the hardware happy so that we don't
trigger MDD events.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-06-04 10:17:55 -07:00

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/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright(c) 1999 - 2018 Intel Corporation. */
#ifndef _IXGBEVF_H_
#define _IXGBEVF_H_
#include <linux/types.h>
#include <linux/bitops.h>
#include <linux/timer.h>
#include <linux/io.h>
#include <linux/netdevice.h>
#include <linux/if_vlan.h>
#include <linux/u64_stats_sync.h>
#include <net/xdp.h>
#include "vf.h"
#define IXGBE_MAX_TXD_PWR 14
#define IXGBE_MAX_DATA_PER_TXD BIT(IXGBE_MAX_TXD_PWR)
/* Tx Descriptors needed, worst case */
#define TXD_USE_COUNT(S) DIV_ROUND_UP((S), IXGBE_MAX_DATA_PER_TXD)
#define DESC_NEEDED (MAX_SKB_FRAGS + 4)
/* wrapper around a pointer to a socket buffer,
* so a DMA handle can be stored along with the buffer
*/
struct ixgbevf_tx_buffer {
union ixgbe_adv_tx_desc *next_to_watch;
unsigned long time_stamp;
union {
struct sk_buff *skb;
/* XDP uses address ptr on irq_clean */
void *data;
};
unsigned int bytecount;
unsigned short gso_segs;
__be16 protocol;
DEFINE_DMA_UNMAP_ADDR(dma);
DEFINE_DMA_UNMAP_LEN(len);
u32 tx_flags;
};
struct ixgbevf_rx_buffer {
dma_addr_t dma;
struct page *page;
#if (BITS_PER_LONG > 32) || (PAGE_SIZE >= 65536)
__u32 page_offset;
#else
__u16 page_offset;
#endif
__u16 pagecnt_bias;
};
struct ixgbevf_stats {
u64 packets;
u64 bytes;
};
struct ixgbevf_tx_queue_stats {
u64 restart_queue;
u64 tx_busy;
u64 tx_done_old;
};
struct ixgbevf_rx_queue_stats {
u64 alloc_rx_page_failed;
u64 alloc_rx_buff_failed;
u64 alloc_rx_page;
u64 csum_err;
};
enum ixgbevf_ring_state_t {
__IXGBEVF_RX_3K_BUFFER,
__IXGBEVF_RX_BUILD_SKB_ENABLED,
__IXGBEVF_TX_DETECT_HANG,
__IXGBEVF_HANG_CHECK_ARMED,
__IXGBEVF_TX_XDP_RING,
__IXGBEVF_TX_XDP_RING_PRIMED,
};
#define ring_is_xdp(ring) \
test_bit(__IXGBEVF_TX_XDP_RING, &(ring)->state)
#define set_ring_xdp(ring) \
set_bit(__IXGBEVF_TX_XDP_RING, &(ring)->state)
#define clear_ring_xdp(ring) \
clear_bit(__IXGBEVF_TX_XDP_RING, &(ring)->state)
struct ixgbevf_ring {
struct ixgbevf_ring *next;
struct ixgbevf_q_vector *q_vector; /* backpointer to q_vector */
struct net_device *netdev;
struct bpf_prog *xdp_prog;
struct device *dev;
void *desc; /* descriptor ring memory */
dma_addr_t dma; /* phys. address of descriptor ring */
unsigned int size; /* length in bytes */
u16 count; /* amount of descriptors */
u16 next_to_use;
u16 next_to_clean;
u16 next_to_alloc;
union {
struct ixgbevf_tx_buffer *tx_buffer_info;
struct ixgbevf_rx_buffer *rx_buffer_info;
};
unsigned long state;
struct ixgbevf_stats stats;
struct u64_stats_sync syncp;
union {
struct ixgbevf_tx_queue_stats tx_stats;
struct ixgbevf_rx_queue_stats rx_stats;
};
struct xdp_rxq_info xdp_rxq;
u64 hw_csum_rx_error;
u8 __iomem *tail;
struct sk_buff *skb;
/* holds the special value that gets the hardware register offset
* associated with this ring, which is different for DCB and RSS modes
*/
u16 reg_idx;
int queue_index; /* needed for multiqueue queue management */
} ____cacheline_internodealigned_in_smp;
/* How many Rx Buffers do we bundle into one write to the hardware ? */
#define IXGBEVF_RX_BUFFER_WRITE 16 /* Must be power of 2 */
#define MAX_RX_QUEUES IXGBE_VF_MAX_RX_QUEUES
#define MAX_TX_QUEUES IXGBE_VF_MAX_TX_QUEUES
#define MAX_XDP_QUEUES IXGBE_VF_MAX_TX_QUEUES
#define IXGBEVF_MAX_RSS_QUEUES 2
#define IXGBEVF_82599_RETA_SIZE 128 /* 128 entries */
#define IXGBEVF_X550_VFRETA_SIZE 64 /* 64 entries */
#define IXGBEVF_RSS_HASH_KEY_SIZE 40
#define IXGBEVF_VFRSSRK_REGS 10 /* 10 registers for RSS key */
#define IXGBEVF_DEFAULT_TXD 1024
#define IXGBEVF_DEFAULT_RXD 512
#define IXGBEVF_MAX_TXD 4096
#define IXGBEVF_MIN_TXD 64
#define IXGBEVF_MAX_RXD 4096
#define IXGBEVF_MIN_RXD 64
/* Supported Rx Buffer Sizes */
#define IXGBEVF_RXBUFFER_256 256 /* Used for packet split */
#define IXGBEVF_RXBUFFER_2048 2048
#define IXGBEVF_RXBUFFER_3072 3072
#define IXGBEVF_RX_HDR_SIZE IXGBEVF_RXBUFFER_256
#define MAXIMUM_ETHERNET_VLAN_SIZE (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)
#define IXGBEVF_SKB_PAD (NET_SKB_PAD + NET_IP_ALIGN)
#if (PAGE_SIZE < 8192)
#define IXGBEVF_MAX_FRAME_BUILD_SKB \
(SKB_WITH_OVERHEAD(IXGBEVF_RXBUFFER_2048) - IXGBEVF_SKB_PAD)
#else
#define IXGBEVF_MAX_FRAME_BUILD_SKB IXGBEVF_RXBUFFER_2048
#endif
#define IXGBE_TX_FLAGS_CSUM BIT(0)
#define IXGBE_TX_FLAGS_VLAN BIT(1)
#define IXGBE_TX_FLAGS_TSO BIT(2)
#define IXGBE_TX_FLAGS_IPV4 BIT(3)
#define IXGBE_TX_FLAGS_VLAN_MASK 0xffff0000
#define IXGBE_TX_FLAGS_VLAN_PRIO_MASK 0x0000e000
#define IXGBE_TX_FLAGS_VLAN_SHIFT 16
#define ring_uses_large_buffer(ring) \
test_bit(__IXGBEVF_RX_3K_BUFFER, &(ring)->state)
#define set_ring_uses_large_buffer(ring) \
set_bit(__IXGBEVF_RX_3K_BUFFER, &(ring)->state)
#define clear_ring_uses_large_buffer(ring) \
clear_bit(__IXGBEVF_RX_3K_BUFFER, &(ring)->state)
#define ring_uses_build_skb(ring) \
test_bit(__IXGBEVF_RX_BUILD_SKB_ENABLED, &(ring)->state)
#define set_ring_build_skb_enabled(ring) \
set_bit(__IXGBEVF_RX_BUILD_SKB_ENABLED, &(ring)->state)
#define clear_ring_build_skb_enabled(ring) \
clear_bit(__IXGBEVF_RX_BUILD_SKB_ENABLED, &(ring)->state)
static inline unsigned int ixgbevf_rx_bufsz(struct ixgbevf_ring *ring)
{
#if (PAGE_SIZE < 8192)
if (ring_uses_large_buffer(ring))
return IXGBEVF_RXBUFFER_3072;
if (ring_uses_build_skb(ring))
return IXGBEVF_MAX_FRAME_BUILD_SKB;
#endif
return IXGBEVF_RXBUFFER_2048;
}
static inline unsigned int ixgbevf_rx_pg_order(struct ixgbevf_ring *ring)
{
#if (PAGE_SIZE < 8192)
if (ring_uses_large_buffer(ring))
return 1;
#endif
return 0;
}
#define ixgbevf_rx_pg_size(_ring) (PAGE_SIZE << ixgbevf_rx_pg_order(_ring))
#define check_for_tx_hang(ring) \
test_bit(__IXGBEVF_TX_DETECT_HANG, &(ring)->state)
#define set_check_for_tx_hang(ring) \
set_bit(__IXGBEVF_TX_DETECT_HANG, &(ring)->state)
#define clear_check_for_tx_hang(ring) \
clear_bit(__IXGBEVF_TX_DETECT_HANG, &(ring)->state)
struct ixgbevf_ring_container {
struct ixgbevf_ring *ring; /* pointer to linked list of rings */
unsigned int total_bytes; /* total bytes processed this int */
unsigned int total_packets; /* total packets processed this int */
u8 count; /* total number of rings in vector */
u8 itr; /* current ITR setting for ring */
};
/* iterator for handling rings in ring container */
#define ixgbevf_for_each_ring(pos, head) \
for (pos = (head).ring; pos != NULL; pos = pos->next)
/* MAX_MSIX_Q_VECTORS of these are allocated,
* but we only use one per queue-specific vector.
*/
struct ixgbevf_q_vector {
struct ixgbevf_adapter *adapter;
/* index of q_vector within array, also used for finding the bit in
* EICR and friends that represents the vector for this ring
*/
u16 v_idx;
u16 itr; /* Interrupt throttle rate written to EITR */
struct napi_struct napi;
struct ixgbevf_ring_container rx, tx;
struct rcu_head rcu; /* to avoid race with update stats on free */
char name[IFNAMSIZ + 9];
/* for dynamic allocation of rings associated with this q_vector */
struct ixgbevf_ring ring[0] ____cacheline_internodealigned_in_smp;
#ifdef CONFIG_NET_RX_BUSY_POLL
unsigned int state;
#define IXGBEVF_QV_STATE_IDLE 0
#define IXGBEVF_QV_STATE_NAPI 1 /* NAPI owns this QV */
#define IXGBEVF_QV_STATE_POLL 2 /* poll owns this QV */
#define IXGBEVF_QV_STATE_DISABLED 4 /* QV is disabled */
#define IXGBEVF_QV_OWNED (IXGBEVF_QV_STATE_NAPI | IXGBEVF_QV_STATE_POLL)
#define IXGBEVF_QV_LOCKED (IXGBEVF_QV_OWNED | IXGBEVF_QV_STATE_DISABLED)
#define IXGBEVF_QV_STATE_NAPI_YIELD 8 /* NAPI yielded this QV */
#define IXGBEVF_QV_STATE_POLL_YIELD 16 /* poll yielded this QV */
#define IXGBEVF_QV_YIELD (IXGBEVF_QV_STATE_NAPI_YIELD | \
IXGBEVF_QV_STATE_POLL_YIELD)
#define IXGBEVF_QV_USER_PEND (IXGBEVF_QV_STATE_POLL | \
IXGBEVF_QV_STATE_POLL_YIELD)
spinlock_t lock;
#endif /* CONFIG_NET_RX_BUSY_POLL */
};
/* microsecond values for various ITR rates shifted by 2 to fit itr register
* with the first 3 bits reserved 0
*/
#define IXGBE_MIN_RSC_ITR 24
#define IXGBE_100K_ITR 40
#define IXGBE_20K_ITR 200
#define IXGBE_12K_ITR 336
/* Helper macros to switch between ints/sec and what the register uses.
* And yes, it's the same math going both ways. The lowest value
* supported by all of the ixgbe hardware is 8.
*/
#define EITR_INTS_PER_SEC_TO_REG(_eitr) \
((_eitr) ? (1000000000 / ((_eitr) * 256)) : 8)
#define EITR_REG_TO_INTS_PER_SEC EITR_INTS_PER_SEC_TO_REG
/* ixgbevf_test_staterr - tests bits in Rx descriptor status and error fields */
static inline __le32 ixgbevf_test_staterr(union ixgbe_adv_rx_desc *rx_desc,
const u32 stat_err_bits)
{
return rx_desc->wb.upper.status_error & cpu_to_le32(stat_err_bits);
}
static inline u16 ixgbevf_desc_unused(struct ixgbevf_ring *ring)
{
u16 ntc = ring->next_to_clean;
u16 ntu = ring->next_to_use;
return ((ntc > ntu) ? 0 : ring->count) + ntc - ntu - 1;
}
static inline void ixgbevf_write_tail(struct ixgbevf_ring *ring, u32 value)
{
writel(value, ring->tail);
}
#define IXGBEVF_RX_DESC(R, i) \
(&(((union ixgbe_adv_rx_desc *)((R)->desc))[i]))
#define IXGBEVF_TX_DESC(R, i) \
(&(((union ixgbe_adv_tx_desc *)((R)->desc))[i]))
#define IXGBEVF_TX_CTXTDESC(R, i) \
(&(((struct ixgbe_adv_tx_context_desc *)((R)->desc))[i]))
#define IXGBE_MAX_JUMBO_FRAME_SIZE 9728 /* Maximum Supported Size 9.5KB */
#define OTHER_VECTOR 1
#define NON_Q_VECTORS (OTHER_VECTOR)
#define MAX_MSIX_Q_VECTORS 2
#define MIN_MSIX_Q_VECTORS 1
#define MIN_MSIX_COUNT (MIN_MSIX_Q_VECTORS + NON_Q_VECTORS)
#define IXGBEVF_RX_DMA_ATTR \
(DMA_ATTR_SKIP_CPU_SYNC | DMA_ATTR_WEAK_ORDERING)
/* board specific private data structure */
struct ixgbevf_adapter {
/* this field must be first, see ixgbevf_process_skb_fields */
unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
struct ixgbevf_q_vector *q_vector[MAX_MSIX_Q_VECTORS];
/* Interrupt Throttle Rate */
u16 rx_itr_setting;
u16 tx_itr_setting;
/* interrupt masks */
u32 eims_enable_mask;
u32 eims_other;
/* XDP */
int num_xdp_queues;
struct ixgbevf_ring *xdp_ring[MAX_XDP_QUEUES];
/* TX */
int num_tx_queues;
struct ixgbevf_ring *tx_ring[MAX_TX_QUEUES]; /* One per active queue */
u64 restart_queue;
u32 tx_timeout_count;
/* RX */
int num_rx_queues;
struct ixgbevf_ring *rx_ring[MAX_TX_QUEUES]; /* One per active queue */
u64 hw_csum_rx_error;
u64 hw_rx_no_dma_resources;
int num_msix_vectors;
u64 alloc_rx_page_failed;
u64 alloc_rx_buff_failed;
u64 alloc_rx_page;
struct msix_entry *msix_entries;
/* OS defined structs */
struct net_device *netdev;
struct bpf_prog *xdp_prog;
struct pci_dev *pdev;
/* structs defined in ixgbe_vf.h */
struct ixgbe_hw hw;
u16 msg_enable;
/* Interrupt Throttle Rate */
u32 eitr_param;
struct ixgbevf_hw_stats stats;
unsigned long state;
u64 tx_busy;
unsigned int tx_ring_count;
unsigned int xdp_ring_count;
unsigned int rx_ring_count;
u8 __iomem *io_addr; /* Mainly for iounmap use */
u32 link_speed;
bool link_up;
struct timer_list service_timer;
struct work_struct service_task;
spinlock_t mbx_lock;
unsigned long last_reset;
u32 *rss_key;
u8 rss_indir_tbl[IXGBEVF_X550_VFRETA_SIZE];
u32 flags;
#define IXGBEVF_FLAGS_LEGACY_RX BIT(1)
};
enum ixbgevf_state_t {
__IXGBEVF_TESTING,
__IXGBEVF_RESETTING,
__IXGBEVF_DOWN,
__IXGBEVF_DISABLED,
__IXGBEVF_REMOVING,
__IXGBEVF_SERVICE_SCHED,
__IXGBEVF_SERVICE_INITED,
__IXGBEVF_RESET_REQUESTED,
__IXGBEVF_QUEUE_RESET_REQUESTED,
};
enum ixgbevf_boards {
board_82599_vf,
board_82599_vf_hv,
board_X540_vf,
board_X540_vf_hv,
board_X550_vf,
board_X550_vf_hv,
board_X550EM_x_vf,
board_X550EM_x_vf_hv,
board_x550em_a_vf,
};
enum ixgbevf_xcast_modes {
IXGBEVF_XCAST_MODE_NONE = 0,
IXGBEVF_XCAST_MODE_MULTI,
IXGBEVF_XCAST_MODE_ALLMULTI,
IXGBEVF_XCAST_MODE_PROMISC,
};
extern const struct ixgbevf_info ixgbevf_82599_vf_info;
extern const struct ixgbevf_info ixgbevf_X540_vf_info;
extern const struct ixgbevf_info ixgbevf_X550_vf_info;
extern const struct ixgbevf_info ixgbevf_X550EM_x_vf_info;
extern const struct ixgbe_mbx_operations ixgbevf_mbx_ops;
extern const struct ixgbevf_info ixgbevf_x550em_a_vf_info;
extern const struct ixgbevf_info ixgbevf_82599_vf_hv_info;
extern const struct ixgbevf_info ixgbevf_X540_vf_hv_info;
extern const struct ixgbevf_info ixgbevf_X550_vf_hv_info;
extern const struct ixgbevf_info ixgbevf_X550EM_x_vf_hv_info;
extern const struct ixgbe_mbx_operations ixgbevf_hv_mbx_ops;
/* needed by ethtool.c */
extern const char ixgbevf_driver_name[];
extern const char ixgbevf_driver_version[];
int ixgbevf_open(struct net_device *netdev);
int ixgbevf_close(struct net_device *netdev);
void ixgbevf_up(struct ixgbevf_adapter *adapter);
void ixgbevf_down(struct ixgbevf_adapter *adapter);
void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter);
void ixgbevf_reset(struct ixgbevf_adapter *adapter);
void ixgbevf_set_ethtool_ops(struct net_device *netdev);
int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,
struct ixgbevf_ring *rx_ring);
int ixgbevf_setup_tx_resources(struct ixgbevf_ring *);
void ixgbevf_free_rx_resources(struct ixgbevf_ring *);
void ixgbevf_free_tx_resources(struct ixgbevf_ring *);
void ixgbevf_update_stats(struct ixgbevf_adapter *adapter);
int ethtool_ioctl(struct ifreq *ifr);
extern void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector);
void ixgbe_napi_add_all(struct ixgbevf_adapter *adapter);
void ixgbe_napi_del_all(struct ixgbevf_adapter *adapter);
#define ixgbevf_hw_to_netdev(hw) \
(((struct ixgbevf_adapter *)(hw)->back)->netdev)
#define hw_dbg(hw, format, arg...) \
netdev_dbg(ixgbevf_hw_to_netdev(hw), format, ## arg)
#endif /* _IXGBEVF_H_ */
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