diff options
Diffstat (limited to 'drivers/net/cxgbe/cxgbe_filter.h')
| -rw-r--r-- | drivers/net/cxgbe/cxgbe_filter.h | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/drivers/net/cxgbe/cxgbe_filter.h b/drivers/net/cxgbe/cxgbe_filter.h new file mode 100644 index 00000000..af8fa752 --- /dev/null +++ b/drivers/net/cxgbe/cxgbe_filter.h @@ -0,0 +1,235 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2018 Chelsio Communications. + * All rights reserved. + */ + +#ifndef _CXGBE_FILTER_H_ +#define _CXGBE_FILTER_H_ + +#include "t4_msg.h" +/* + * Defined bit width of user definable filter tuples + */ +#define ETHTYPE_BITWIDTH 16 +#define FRAG_BITWIDTH 1 +#define MACIDX_BITWIDTH 9 +#define FCOE_BITWIDTH 1 +#define IPORT_BITWIDTH 3 +#define MATCHTYPE_BITWIDTH 3 +#define PROTO_BITWIDTH 8 +#define TOS_BITWIDTH 8 +#define PF_BITWIDTH 8 +#define VF_BITWIDTH 8 +#define IVLAN_BITWIDTH 16 +#define OVLAN_BITWIDTH 16 + +/* + * Filter matching rules. These consist of a set of ingress packet field + * (value, mask) tuples. The associated ingress packet field matches the + * tuple when ((field & mask) == value). (Thus a wildcard "don't care" field + * rule can be constructed by specifying a tuple of (0, 0).) A filter rule + * matches an ingress packet when all of the individual individual field + * matching rules are true. + * + * Partial field masks are always valid, however, while it may be easy to + * understand their meanings for some fields (e.g. IP address to match a + * subnet), for others making sensible partial masks is less intuitive (e.g. + * MPS match type) ... + */ +struct ch_filter_tuple { + /* + * Compressed header matching field rules. The TP_VLAN_PRI_MAP + * register selects which of these fields will participate in the + * filter match rules -- up to a maximum of 36 bits. Because + * TP_VLAN_PRI_MAP is a global register, all filters must use the same + * set of fields. + */ + uint32_t ethtype:ETHTYPE_BITWIDTH; /* Ethernet type */ + uint32_t frag:FRAG_BITWIDTH; /* IP fragmentation header */ + uint32_t ivlan_vld:1; /* inner VLAN valid */ + uint32_t ovlan_vld:1; /* outer VLAN valid */ + uint32_t pfvf_vld:1; /* PF/VF valid */ + uint32_t macidx:MACIDX_BITWIDTH; /* exact match MAC index */ + uint32_t fcoe:FCOE_BITWIDTH; /* FCoE packet */ + uint32_t iport:IPORT_BITWIDTH; /* ingress port */ + uint32_t matchtype:MATCHTYPE_BITWIDTH; /* MPS match type */ + uint32_t proto:PROTO_BITWIDTH; /* protocol type */ + uint32_t tos:TOS_BITWIDTH; /* TOS/Traffic Type */ + uint32_t pf:PF_BITWIDTH; /* PCI-E PF ID */ + uint32_t vf:VF_BITWIDTH; /* PCI-E VF ID */ + uint32_t ivlan:IVLAN_BITWIDTH; /* inner VLAN */ + uint32_t ovlan:OVLAN_BITWIDTH; /* outer VLAN */ + + /* + * Uncompressed header matching field rules. These are always + * available for field rules. + */ + uint8_t lip[16]; /* local IP address (IPv4 in [3:0]) */ + uint8_t fip[16]; /* foreign IP address (IPv4 in [3:0]) */ + uint16_t lport; /* local port */ + uint16_t fport; /* foreign port */ + + /* reservations for future additions */ + uint8_t rsvd[12]; +}; + +/* + * Filter specification + */ +struct ch_filter_specification { + /* Administrative fields for filter. */ + uint32_t hitcnts:1; /* count filter hits in TCB */ + uint32_t prio:1; /* filter has priority over active/server */ + + /* + * Fundamental filter typing. This is the one element of filter + * matching that doesn't exist as a (value, mask) tuple. + */ + uint32_t type:1; /* 0 => IPv4, 1 => IPv6 */ + uint32_t cap:1; /* 0 => LE-TCAM, 1 => Hash */ + + /* + * Packet dispatch information. Ingress packets which match the + * filter rules will be dropped, passed to the host or switched back + * out as egress packets. + */ + uint32_t action:2; /* drop, pass, switch */ + + uint32_t dirsteer:1; /* 0 => RSS, 1 => steer to iq */ + uint32_t iq:10; /* ingress queue */ + + uint32_t eport:2; /* egress port to switch packet out */ + + /* Filter rule value/mask pairs. */ + struct ch_filter_tuple val; + struct ch_filter_tuple mask; +}; + +enum { + FILTER_PASS = 0, /* default */ + FILTER_DROP, + FILTER_SWITCH +}; + +enum filter_type { + FILTER_TYPE_IPV4 = 0, + FILTER_TYPE_IPV6, +}; + +struct t4_completion { + unsigned int done; /* completion done (0 - No, 1 - Yes) */ + rte_spinlock_t lock; /* completion lock */ +}; + +/* + * Filter operation context to allow callers to wait for + * an asynchronous completion. + */ +struct filter_ctx { + struct t4_completion completion; /* completion rendezvous */ + int result; /* result of operation */ + u32 tid; /* to store tid of hash filter */ +}; + +/* + * Host shadow copy of ingress filter entry. This is in host native format + * and doesn't match the ordering or bit order, etc. of the hardware or the + * firmware command. + */ +struct filter_entry { + /* + * Administrative fields for filter. + */ + u32 valid:1; /* filter allocated and valid */ + u32 locked:1; /* filter is administratively locked */ + u32 pending:1; /* filter action is pending FW reply */ + struct filter_ctx *ctx; /* caller's completion hook */ + struct clip_entry *clipt; /* CLIP Table entry for IPv6 */ + struct rte_eth_dev *dev; /* Port's rte eth device */ + void *private; /* For use by apps using filter_entry */ + + /* This will store the actual tid */ + u32 tid; + + /* + * The filter itself. + */ + struct ch_filter_specification fs; +}; + +#define FILTER_ID_MAX (~0U) + +struct tid_info; +struct adapter; + +/** + * Find first clear bit in the bitmap. + */ +static inline unsigned int cxgbe_find_first_zero_bit(struct rte_bitmap *bmap, + unsigned int size) +{ + unsigned int idx; + + for (idx = 0; idx < size; idx++) + if (!rte_bitmap_get(bmap, idx)) + break; + + return idx; +} + +/** + * Find a free region of 'num' consecutive entries. + */ +static inline unsigned int +cxgbe_bitmap_find_free_region(struct rte_bitmap *bmap, unsigned int size, + unsigned int num) +{ + unsigned int idx, j, free = 0; + + if (num > size) + return size; + + for (idx = 0; idx < size; idx += num) { + for (j = 0; j < num; j++) { + if (!rte_bitmap_get(bmap, idx + j)) { + free++; + } else { + free = 0; + break; + } + } + + /* Found the Region */ + if (free == num) + break; + + /* Reached the end and still no region found */ + if ((idx + num) > size) { + idx = size; + break; + } + } + + return idx; +} + +bool is_filter_set(struct tid_info *, int fidx, int family); +void filter_rpl(struct adapter *adap, const struct cpl_set_tcb_rpl *rpl); +void clear_filter(struct filter_entry *f); +int set_filter_wr(struct rte_eth_dev *dev, unsigned int fidx); +int writable_filter(struct filter_entry *f); +int cxgbe_set_filter(struct rte_eth_dev *dev, unsigned int filter_id, + struct ch_filter_specification *fs, + struct filter_ctx *ctx); +int cxgbe_del_filter(struct rte_eth_dev *dev, unsigned int filter_id, + struct ch_filter_specification *fs, + struct filter_ctx *ctx); +int cxgbe_alloc_ftid(struct adapter *adap, unsigned int family); +int init_hash_filter(struct adapter *adap); +void hash_filter_rpl(struct adapter *adap, const struct cpl_act_open_rpl *rpl); +void hash_del_filter_rpl(struct adapter *adap, + const struct cpl_abort_rpl_rss *rpl); +int validate_filter(struct adapter *adap, struct ch_filter_specification *fs); +int cxgbe_get_filter_count(struct adapter *adapter, unsigned int fidx, + u64 *c, int hash, bool get_byte); +#endif /* _CXGBE_FILTER_H_ */ |