1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2015 6WIND S.A.
3 * Copyright 2015 Mellanox Technologies, Ltd
6 #ifndef RTE_PMD_MLX5_DEFS_H_
7 #define RTE_PMD_MLX5_DEFS_H_
9 #include <rte_ethdev_driver.h>
11 #include "mlx5_autoconf.h"
13 /* Reported driver name. */
14 #define MLX5_DRIVER_NAME "net_mlx5"
16 /* Maximum number of simultaneous unicast MAC addresses. */
17 #define MLX5_MAX_UC_MAC_ADDRESSES 128
18 /* Maximum number of simultaneous Multicast MAC addresses. */
19 #define MLX5_MAX_MC_MAC_ADDRESSES 128
20 /* Maximum number of simultaneous MAC addresses. */
21 #define MLX5_MAX_MAC_ADDRESSES \
22 (MLX5_MAX_UC_MAC_ADDRESSES + MLX5_MAX_MC_MAC_ADDRESSES)
24 /* Maximum number of simultaneous VLAN filters. */
25 #define MLX5_MAX_VLAN_IDS 128
28 * Request TX completion every time descriptors reach this threshold since
29 * the previous request. Must be a power of two for performance reasons.
31 #define MLX5_TX_COMP_THRESH 32
34 * Request TX completion every time the total number of WQEBBs used for inlining
35 * packets exceeds the size of WQ divided by this divisor. Better to be power of
36 * two for performance.
38 #define MLX5_TX_COMP_THRESH_INLINE_DIV (1 << 3)
40 /* Size of per-queue MR cache array for linear search. */
41 #define MLX5_MR_CACHE_N 8
43 /* Size of MR cache table for binary search. */
44 #define MLX5_MR_BTREE_CACHE_N 256
47 * If defined, only use software counters. The PMD will never ask the hardware
48 * for these, and many of them won't be available.
50 #ifndef MLX5_PMD_SOFT_COUNTERS
51 #define MLX5_PMD_SOFT_COUNTERS 1
55 #define MLX5_ALARM_TIMEOUT_US 100000
57 /* Maximum number of extended statistics counters. */
58 #define MLX5_MAX_XSTATS 32
60 /* Maximum Packet headers size (L2+L3+L4) for TSO. */
61 #define MLX5_MAX_TSO_HEADER 192
63 /* Default minimum number of Tx queues for vectorized Tx. */
64 #define MLX5_VPMD_MIN_TXQS 4
66 /* Threshold of buffer replenishment for vectorized Rx. */
67 #define MLX5_VPMD_RXQ_RPLNSH_THRESH(n) \
68 (RTE_MIN(MLX5_VPMD_RX_MAX_BURST, (unsigned int)(n) >> 2))
70 /* Maximum size of burst for vectorized Rx. */
71 #define MLX5_VPMD_RX_MAX_BURST 64U
74 * Maximum size of burst for vectorized Tx. This is related to the maximum size
75 * of Enhanced MPW (eMPW) WQE as vectorized Tx is supported with eMPW.
76 * Careful when changing, large value can cause WQE DS to overlap.
78 #define MLX5_VPMD_TX_MAX_BURST 32U
80 /* Number of packets vectorized Rx can simultaneously process in a loop. */
81 #define MLX5_VPMD_DESCS_PER_LOOP 4
84 #define MLX5_RSS_HF_MASK (~(ETH_RSS_IP | ETH_RSS_UDP | ETH_RSS_TCP))
86 /* Timeout in seconds to get a valid link status. */
87 #define MLX5_LINK_STATUS_TIMEOUT 10
89 /* Reserved address space for UAR mapping. */
90 #define MLX5_UAR_SIZE (1ULL << (sizeof(uintptr_t) * 4))
92 /* Offset of reserved UAR address space to hugepage memory. Offset is used here
93 * to minimize possibility of address next to hugepage being used by other code
94 * in either primary or secondary process, failing to map TX UAR would make TX
95 * packets invisible to HW.
97 #define MLX5_UAR_OFFSET (1ULL << (sizeof(uintptr_t) * 4))
99 /* Maximum number of UAR pages used by a port,
100 * These are the size and mask for an array of mutexes used to synchronize
101 * the access to port's UARs on platforms that do not support 64 bit writes.
102 * In such systems it is possible to issue the 64 bits DoorBells through two
103 * consecutive writes, each write 32 bits. The access to a UAR page (which can
104 * be accessible by all threads in the process) must be synchronized
105 * (for example, using a semaphore). Such a synchronization is not required
106 * when ringing DoorBells on different UAR pages.
107 * A port with 512 Tx queues uses 8, 4kBytes, UAR pages which are shared
110 #define MLX5_UAR_PAGE_NUM_MAX 64
111 #define MLX5_UAR_PAGE_NUM_MASK ((MLX5_UAR_PAGE_NUM_MAX) - 1)
113 /* Log 2 of the default number of strides per WQE for Multi-Packet RQ. */
114 #define MLX5_MPRQ_STRIDE_NUM_N 6U
116 /* Two-byte shift is disabled for Multi-Packet RQ. */
117 #define MLX5_MPRQ_TWO_BYTE_SHIFT 0
120 * Minimum size of packet to be memcpy'd instead of being attached as an
123 #define MLX5_MPRQ_MEMCPY_DEFAULT_LEN 128
125 /* Minimum number Rx queues to enable Multi-Packet RQ. */
126 #define MLX5_MPRQ_MIN_RXQS 12
128 /* Cache size of mempool for Multi-Packet RQ. */
129 #define MLX5_MPRQ_MP_CACHE_SZ 32U
131 /* Definition of static_assert found in /usr/include/assert.h */
132 #ifndef HAVE_STATIC_ASSERT
133 #define static_assert _Static_assert
136 #endif /* RTE_PMD_MLX5_DEFS_H_ */