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freebsd-skq/sys/dev/vnic/nicvf_queues.h
Zbigniew Bodek 2306b72a5d Introduce initial support for Cavium's ThunderX networking interface 
- The driver consists of three main componens: PF, VF, BGX
- Requires appropriate entries in DTS and MDIO driver
- Supports only FDT configuration
- Multiple Tx queues and single Rx queue supported
- No RSS, HW checksum and TSO support
- No more than 8 queues per-IF (only one Queue Set per IF)
- HW statistics enabled
- Works in all available MAC modes (1,10,20,40G)
- Style converted to BSD according to style(9)
- The code brings lmac_if interface used by the BGX driver to
  update its logical MACs state.

Obtained from: Semihalf
Sponsored by:  The FreeBSD Foundation
2015-10-18 22:02:58 +00:00

401 lines
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/*
* Copyright (C) 2015 Cavium Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*
*/
#ifndef NICVF_QUEUES_H
#define NICVF_QUEUES_H
#include "q_struct.h"
#define MAX_QUEUE_SET 128
#define MAX_RCV_QUEUES_PER_QS 8
#define MAX_RCV_BUF_DESC_RINGS_PER_QS 2
#define MAX_SND_QUEUES_PER_QS 8
#define MAX_CMP_QUEUES_PER_QS 8
/* VF's queue interrupt ranges */
#define NICVF_INTR_ID_CQ 0
#define NICVF_INTR_ID_SQ 8
#define NICVF_INTR_ID_RBDR 16
#define NICVF_INTR_ID_MISC 18
#define NICVF_INTR_ID_QS_ERR 19
#define for_each_cq_irq(irq) \
for ((irq) = NICVF_INTR_ID_CQ; (irq) < NICVF_INTR_ID_SQ; (irq)++)
#define for_each_sq_irq(irq) \
for ((irq) = NICVF_INTR_ID_SQ; (irq) < NICVF_INTR_ID_RBDR; (irq)++)
#define for_each_rbdr_irq(irq) \
for ((irq) = NICVF_INTR_ID_RBDR; (irq) < NICVF_INTR_ID_MISC; (irq)++)
#define RBDR_SIZE0 0UL /* 8K entries */
#define RBDR_SIZE1 1UL /* 16K entries */
#define RBDR_SIZE2 2UL /* 32K entries */
#define RBDR_SIZE3 3UL /* 64K entries */
#define RBDR_SIZE4 4UL /* 126K entries */
#define RBDR_SIZE5 5UL /* 256K entries */
#define RBDR_SIZE6 6UL /* 512K entries */
#define SND_QUEUE_SIZE0 0UL /* 1K entries */
#define SND_QUEUE_SIZE1 1UL /* 2K entries */
#define SND_QUEUE_SIZE2 2UL /* 4K entries */
#define SND_QUEUE_SIZE3 3UL /* 8K entries */
#define SND_QUEUE_SIZE4 4UL /* 16K entries */
#define SND_QUEUE_SIZE5 5UL /* 32K entries */
#define SND_QUEUE_SIZE6 6UL /* 64K entries */
#define CMP_QUEUE_SIZE0 0UL /* 1K entries */
#define CMP_QUEUE_SIZE1 1UL /* 2K entries */
#define CMP_QUEUE_SIZE2 2UL /* 4K entries */
#define CMP_QUEUE_SIZE3 3UL /* 8K entries */
#define CMP_QUEUE_SIZE4 4UL /* 16K entries */
#define CMP_QUEUE_SIZE5 5UL /* 32K entries */
#define CMP_QUEUE_SIZE6 6UL /* 64K entries */
/* Default queue count per QS, its lengths and threshold values */
#define RBDR_CNT 1
#define RCV_QUEUE_CNT 8
#define SND_QUEUE_CNT 8
#define CMP_QUEUE_CNT 8 /* Max of RCV and SND qcount */
#define SND_QSIZE SND_QUEUE_SIZE2
#define SND_QUEUE_LEN (1UL << (SND_QSIZE + 10))
#define MAX_SND_QUEUE_LEN (1UL << (SND_QUEUE_SIZE6 + 10))
#define SND_QUEUE_THRESH 2UL
#define MIN_SQ_DESC_PER_PKT_XMIT 2
/* Since timestamp not enabled, otherwise 2 */
#define MAX_CQE_PER_PKT_XMIT 1
/*
* Keep CQ and SQ sizes same, if timestamping
* is enabled this equation will change.
*/
#define CMP_QSIZE CMP_QUEUE_SIZE2
#define CMP_QUEUE_LEN (1UL << (CMP_QSIZE + 10))
#define CMP_QUEUE_CQE_THRESH 0
#define CMP_QUEUE_TIMER_THRESH 220 /* 10usec */
#define RBDR_SIZE RBDR_SIZE0
#define RCV_BUF_COUNT (1UL << (RBDR_SIZE + 13))
#define MAX_RCV_BUF_COUNT (1UL << (RBDR_SIZE6 + 13))
#define RBDR_THRESH (RCV_BUF_COUNT / 2)
#define DMA_BUFFER_LEN 2048 /* In multiples of 128bytes */
#define MAX_CQES_FOR_TX \
((SND_QUEUE_LEN / MIN_SQ_DESC_PER_PKT_XMIT) * MAX_CQE_PER_PKT_XMIT)
/* Calculate number of CQEs to reserve for all SQEs.
* Its 1/256th level of CQ size.
* '+ 1' to account for pipelining
*/
#define RQ_CQ_DROP \
((256 / (CMP_QUEUE_LEN / (CMP_QUEUE_LEN - MAX_CQES_FOR_TX))) + 1)
/* Descriptor size in bytes */
#define SND_QUEUE_DESC_SIZE 16
#define CMP_QUEUE_DESC_SIZE 512
/* Buffer / descriptor alignments */
#define NICVF_RCV_BUF_ALIGN 7
#define NICVF_RCV_BUF_ALIGN_BYTES (1UL << NICVF_RCV_BUF_ALIGN)
#define NICVF_CQ_BASE_ALIGN_BYTES 512 /* 9 bits */
#define NICVF_SQ_BASE_ALIGN_BYTES 128 /* 7 bits */
#define NICVF_ALIGNED_ADDR(addr, align_bytes) \
roundup2((addr), (align_bytes))
#define NICVF_ADDR_ALIGN_LEN(addr, bytes) \
(NICVF_ALIGNED_ADDR((addr), (bytes)) - (bytes))
#define NICVF_RCV_BUF_ALIGN_LEN(addr) \
(NICVF_ALIGNED_ADDR((addr), NICVF_RCV_BUF_ALIGN_BYTES) - (addr))
#define NICVF_TXBUF_MAXSIZE 9212 /* Total max payload without TSO */
#define NICVF_TXBUF_NSEGS 256 /* Single command is at most 256 buffers
(hdr + 255 subcmds) */
/* Queue enable/disable */
#define NICVF_SQ_EN (1UL << 19)
/* Queue reset */
#define NICVF_CQ_RESET (1UL << 41)
#define NICVF_SQ_RESET (1UL << 17)
#define NICVF_RBDR_RESET (1UL << 43)
enum CQ_RX_ERRLVL_E {
CQ_ERRLVL_MAC,
CQ_ERRLVL_L2,
CQ_ERRLVL_L3,
CQ_ERRLVL_L4,
};
enum CQ_RX_ERROP_E {
CQ_RX_ERROP_RE_NONE = 0x0,
CQ_RX_ERROP_RE_PARTIAL = 0x1,
CQ_RX_ERROP_RE_JABBER = 0x2,
CQ_RX_ERROP_RE_FCS = 0x7,
CQ_RX_ERROP_RE_TERMINATE = 0x9,
CQ_RX_ERROP_RE_RX_CTL = 0xb,
CQ_RX_ERROP_PREL2_ERR = 0x1f,
CQ_RX_ERROP_L2_FRAGMENT = 0x20,
CQ_RX_ERROP_L2_OVERRUN = 0x21,
CQ_RX_ERROP_L2_PFCS = 0x22,
CQ_RX_ERROP_L2_PUNY = 0x23,
CQ_RX_ERROP_L2_MAL = 0x24,
CQ_RX_ERROP_L2_OVERSIZE = 0x25,
CQ_RX_ERROP_L2_UNDERSIZE = 0x26,
CQ_RX_ERROP_L2_LENMISM = 0x27,
CQ_RX_ERROP_L2_PCLP = 0x28,
CQ_RX_ERROP_IP_NOT = 0x41,
CQ_RX_ERROP_IP_CSUM_ERR = 0x42,
CQ_RX_ERROP_IP_MAL = 0x43,
CQ_RX_ERROP_IP_MALD = 0x44,
CQ_RX_ERROP_IP_HOP = 0x45,
CQ_RX_ERROP_L3_ICRC = 0x46,
CQ_RX_ERROP_L3_PCLP = 0x47,
CQ_RX_ERROP_L4_MAL = 0x61,
CQ_RX_ERROP_L4_CHK = 0x62,
CQ_RX_ERROP_UDP_LEN = 0x63,
CQ_RX_ERROP_L4_PORT = 0x64,
CQ_RX_ERROP_TCP_FLAG = 0x65,
CQ_RX_ERROP_TCP_OFFSET = 0x66,
CQ_RX_ERROP_L4_PCLP = 0x67,
CQ_RX_ERROP_RBDR_TRUNC = 0x70,
};
enum CQ_TX_ERROP_E {
CQ_TX_ERROP_GOOD = 0x0,
CQ_TX_ERROP_DESC_FAULT = 0x10,
CQ_TX_ERROP_HDR_CONS_ERR = 0x11,
CQ_TX_ERROP_SUBDC_ERR = 0x12,
CQ_TX_ERROP_IMM_SIZE_OFLOW = 0x80,
CQ_TX_ERROP_DATA_SEQUENCE_ERR = 0x81,
CQ_TX_ERROP_MEM_SEQUENCE_ERR = 0x82,
CQ_TX_ERROP_LOCK_VIOL = 0x83,
CQ_TX_ERROP_DATA_FAULT = 0x84,
CQ_TX_ERROP_TSTMP_CONFLICT = 0x85,
CQ_TX_ERROP_TSTMP_TIMEOUT = 0x86,
CQ_TX_ERROP_MEM_FAULT = 0x87,
CQ_TX_ERROP_CK_OVERLAP = 0x88,
CQ_TX_ERROP_CK_OFLOW = 0x89,
CQ_TX_ERROP_ENUM_LAST = 0x8a,
};
struct cmp_queue_stats {
struct tx_stats {
uint64_t good;
uint64_t desc_fault;
uint64_t hdr_cons_err;
uint64_t subdesc_err;
uint64_t imm_size_oflow;
uint64_t data_seq_err;
uint64_t mem_seq_err;
uint64_t lock_viol;
uint64_t data_fault;
uint64_t tstmp_conflict;
uint64_t tstmp_timeout;
uint64_t mem_fault;
uint64_t csum_overlap;
uint64_t csum_overflow;
} tx;
} __aligned(CACHE_LINE_SIZE);
enum RQ_SQ_STATS {
RQ_SQ_STATS_OCTS,
RQ_SQ_STATS_PKTS,
};
struct rx_tx_queue_stats {
uint64_t bytes;
uint64_t pkts;
} __aligned(CACHE_LINE_SIZE);
struct q_desc_mem {
bus_dma_tag_t dmat;
bus_dmamap_t dmap;
void *base;
bus_addr_t phys_base;
uint64_t size;
uint16_t q_len;
};
struct rbdr {
boolean_t enable;
uint32_t dma_size;
uint32_t frag_len;
uint32_t thresh; /* Threshold level for interrupt */
void *desc;
uint32_t head;
uint32_t tail;
struct q_desc_mem dmem;
struct nicvf *nic;
int idx;
struct task rbdr_task;
struct task rbdr_task_nowait;
struct taskqueue *rbdr_taskq;
bus_dma_tag_t rbdr_buff_dmat;
bus_dmamap_t *rbdr_buff_dmaps;
} __aligned(CACHE_LINE_SIZE);
struct rcv_queue {
boolean_t enable;
struct rbdr *rbdr_start;
struct rbdr *rbdr_cont;
boolean_t en_tcp_reassembly;
uint8_t cq_qs; /* CQ's QS to which this RQ is assigned */
uint8_t cq_idx; /* CQ index (0 to 7) in the QS */
uint8_t cont_rbdr_qs; /* Continue buffer ptrs - QS num */
uint8_t cont_qs_rbdr_idx; /* RBDR idx in the cont QS */
uint8_t start_rbdr_qs; /* First buffer ptrs - QS num */
uint8_t start_qs_rbdr_idx; /* RBDR idx in the above QS */
uint8_t caching;
struct rx_tx_queue_stats stats;
} __aligned(CACHE_LINE_SIZE);
struct cmp_queue {
boolean_t enable;
uint16_t thresh;
struct nicvf *nic;
int idx; /* This queue index */
struct buf_ring *rx_br; /* Reception buf ring */
struct mtx mtx; /* lock to serialize processing CQEs */
char mtx_name[32];
struct task cmp_task;
struct taskqueue *cmp_taskq;
void *desc;
struct q_desc_mem dmem;
struct cmp_queue_stats stats;
int irq;
} __aligned(CACHE_LINE_SIZE);
struct snd_buff {
bus_dmamap_t dmap;
struct mbuf *mbuf;
};
struct snd_queue {
boolean_t enable;
uint8_t cq_qs; /* CQ's QS to which this SQ is pointing */
uint8_t cq_idx; /* CQ index (0 to 7) in the above QS */
uint16_t thresh;
volatile int free_cnt;
uint32_t head;
uint32_t tail;
uint64_t *skbuff;
void *desc;
struct nicvf *nic;
int idx; /* This queue index */
bus_dma_tag_t snd_buff_dmat;
struct snd_buff *snd_buff;
struct buf_ring *br; /* Transmission buf ring */
struct mtx mtx;
char mtx_name[32];
struct task snd_task;
struct taskqueue *snd_taskq;
struct q_desc_mem dmem;
struct rx_tx_queue_stats stats;
} __aligned(CACHE_LINE_SIZE);
struct queue_set {
boolean_t enable;
boolean_t be_en;
uint8_t vnic_id;
uint8_t rq_cnt;
uint8_t cq_cnt;
uint64_t cq_len;
uint8_t sq_cnt;
uint64_t sq_len;
uint8_t rbdr_cnt;
uint64_t rbdr_len;
struct rcv_queue rq[MAX_RCV_QUEUES_PER_QS];
struct cmp_queue cq[MAX_CMP_QUEUES_PER_QS];
struct snd_queue sq[MAX_SND_QUEUES_PER_QS];
struct rbdr rbdr[MAX_RCV_BUF_DESC_RINGS_PER_QS];
struct task qs_err_task;
struct taskqueue *qs_err_taskq;
} __aligned(CACHE_LINE_SIZE);
#define GET_RBDR_DESC(RING, idx) \
(&(((struct rbdr_entry_t *)((RING)->desc))[(idx)]))
#define GET_SQ_DESC(RING, idx) \
(&(((struct sq_hdr_subdesc *)((RING)->desc))[(idx)]))
#define GET_CQ_DESC(RING, idx) \
(&(((union cq_desc_t *)((RING)->desc))[(idx)]))
/* CQ status bits */
#define CQ_WR_FUL (1UL << 26)
#define CQ_WR_DISABLE (1UL << 25)
#define CQ_WR_FAULT (1UL << 24)
#define CQ_CQE_COUNT (0xFFFF << 0)
#define CQ_ERR_MASK (CQ_WR_FUL | CQ_WR_DISABLE | CQ_WR_FAULT)
#define NICVF_TX_LOCK(sq) mtx_lock(&(sq)->mtx)
#define NICVF_TX_TRYLOCK(sq) mtx_trylock(&(sq)->mtx)
#define NICVF_TX_UNLOCK(sq) mtx_unlock(&(sq)->mtx)
#define NICVF_TX_LOCK_ASSERT(sq) mtx_assert(&(sq)->mtx, MA_OWNED)
#define NICVF_CMP_LOCK(cq) mtx_lock(&(cq)->mtx)
#define NICVF_CMP_UNLOCK(cq) mtx_unlock(&(cq)->mtx)
int nicvf_set_qset_resources(struct nicvf *);
int nicvf_config_data_transfer(struct nicvf *, boolean_t);
void nicvf_qset_config(struct nicvf *, boolean_t);
void nicvf_enable_intr(struct nicvf *, int, int);
void nicvf_disable_intr(struct nicvf *, int, int);
void nicvf_clear_intr(struct nicvf *, int, int);
int nicvf_is_intr_enabled(struct nicvf *, int, int);
/* Register access APIs */
void nicvf_reg_write(struct nicvf *, uint64_t, uint64_t);
uint64_t nicvf_reg_read(struct nicvf *, uint64_t);
void nicvf_qset_reg_write(struct nicvf *, uint64_t, uint64_t);
uint64_t nicvf_qset_reg_read(struct nicvf *, uint64_t);
void nicvf_queue_reg_write(struct nicvf *, uint64_t, uint64_t, uint64_t);
uint64_t nicvf_queue_reg_read(struct nicvf *, uint64_t, uint64_t);
/* Stats */
void nicvf_update_rq_stats(struct nicvf *, int);
void nicvf_update_sq_stats(struct nicvf *, int);
int nicvf_check_cqe_rx_errs(struct nicvf *, struct cmp_queue *,
struct cqe_rx_t *);
int nicvf_check_cqe_tx_errs(struct nicvf *,struct cmp_queue *,
struct cqe_send_t *);
#endif /* NICVF_QUEUES_H */
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