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linux/drivers/net/ethernet/cavium/thunder/nicvf_queues.h
Sunil Goutham 4863dea3fa net: Adding support for Cavium ThunderX network controller 
This patch adds support for the Cavium ThunderX network controller.
The driver is on the pci bus and thus requires the Thunder PCIe host
controller driver to be enabled.

Signed-off-by: Maciej Czekaj <mjc@semihalf.com>
Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
Signed-off-by: Ganapatrao Kulkarni <ganapatrao.kulkarni@caviumnetworks.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@caviumnetworks.com>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Robert Richter <rrichter@cavium.com>
Signed-off-by: Kamil Rytarowski <kamil@semihalf.com>
Signed-off-by: Thanneeru Srinivasulu <tsrinivasulu@caviumnetworks.com>
Signed-off-by: Sruthi Vangala <svangala@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-27 14:19:44 -04:00

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/*
* Copyright (C) 2015 Cavium, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License
* as published by the Free Software Foundation.
*/
#ifndef NICVF_QUEUES_H
#define NICVF_QUEUES_H
#include <linux/netdevice.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 0ULL /* 8K entries */
#define RBDR_SIZE1 1ULL /* 16K entries */
#define RBDR_SIZE2 2ULL /* 32K entries */
#define RBDR_SIZE3 3ULL /* 64K entries */
#define RBDR_SIZE4 4ULL /* 126K entries */
#define RBDR_SIZE5 5ULL /* 256K entries */
#define RBDR_SIZE6 6ULL /* 512K entries */
#define SND_QUEUE_SIZE0 0ULL /* 1K entries */
#define SND_QUEUE_SIZE1 1ULL /* 2K entries */
#define SND_QUEUE_SIZE2 2ULL /* 4K entries */
#define SND_QUEUE_SIZE3 3ULL /* 8K entries */
#define SND_QUEUE_SIZE4 4ULL /* 16K entries */
#define SND_QUEUE_SIZE5 5ULL /* 32K entries */
#define SND_QUEUE_SIZE6 6ULL /* 64K entries */
#define CMP_QUEUE_SIZE0 0ULL /* 1K entries */
#define CMP_QUEUE_SIZE1 1ULL /* 2K entries */
#define CMP_QUEUE_SIZE2 2ULL /* 4K entries */
#define CMP_QUEUE_SIZE3 3ULL /* 8K entries */
#define CMP_QUEUE_SIZE4 4ULL /* 16K entries */
#define CMP_QUEUE_SIZE5 5ULL /* 32K entries */
#define CMP_QUEUE_SIZE6 6ULL /* 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_SIZE4
#define SND_QUEUE_LEN (1ULL << (SND_QSIZE + 10))
#define MAX_SND_QUEUE_LEN (1ULL << (SND_QUEUE_SIZE6 + 10))
#define SND_QUEUE_THRESH 2ULL
#define MIN_SQ_DESC_PER_PKT_XMIT 2
/* Since timestamp not enabled, otherwise 2 */
#define MAX_CQE_PER_PKT_XMIT 1
#define CMP_QSIZE CMP_QUEUE_SIZE4
#define CMP_QUEUE_LEN (1ULL << (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 (1ULL << (RBDR_SIZE + 13))
#define MAX_RCV_BUF_COUNT (1ULL << (RBDR_SIZE6 + 13))
#define RBDR_THRESH (RCV_BUF_COUNT / 2)
#define DMA_BUFFER_LEN 2048 /* In multiples of 128bytes */
#define RCV_FRAG_LEN (SKB_DATA_ALIGN(DMA_BUFFER_LEN + NET_SKB_PAD) + \
SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) + \
(NICVF_RCV_BUF_ALIGN_BYTES * 2))
#define RCV_DATA_OFFSET NICVF_RCV_BUF_ALIGN_BYTES
#define MAX_CQES_FOR_TX ((SND_QUEUE_LEN / MIN_SQ_DESC_PER_PKT_XMIT) * \
MAX_CQE_PER_PKT_XMIT)
#define RQ_CQ_DROP ((CMP_QUEUE_LEN - MAX_CQES_FOR_TX) / 256)
/* 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 (1ULL << 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) ALIGN(ADDR, ALIGN_BYTES)
#define NICVF_ADDR_ALIGN_LEN(ADDR, BYTES)\
(NICVF_ALIGNED_ADDR(ADDR, BYTES) - BYTES)
#define NICVF_RCV_BUF_ALIGN_LEN(X)\
(NICVF_ALIGNED_ADDR(X, NICVF_RCV_BUF_ALIGN_BYTES) - X)
/* Queue enable/disable */
#define NICVF_SQ_EN BIT_ULL(19)
/* Queue reset */
#define NICVF_CQ_RESET BIT_ULL(41)
#define NICVF_SQ_RESET BIT_ULL(17)
#define NICVF_RBDR_RESET BIT_ULL(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 rx_stats {
struct {
u64 mac_errs;
u64 l2_errs;
u64 l3_errs;
u64 l4_errs;
} errlvl;
struct {
u64 good;
u64 partial_pkts;
u64 jabber_errs;
u64 fcs_errs;
u64 terminate_errs;
u64 bgx_rx_errs;
u64 prel2_errs;
u64 l2_frags;
u64 l2_overruns;
u64 l2_pfcs;
u64 l2_puny;
u64 l2_hdr_malformed;
u64 l2_oversize;
u64 l2_undersize;
u64 l2_len_mismatch;
u64 l2_pclp;
u64 non_ip;
u64 ip_csum_err;
u64 ip_hdr_malformed;
u64 ip_payload_malformed;
u64 ip_hop_errs;
u64 l3_icrc_errs;
u64 l3_pclp;
u64 l4_malformed;
u64 l4_csum_errs;
u64 udp_len_err;
u64 bad_l4_port;
u64 bad_tcp_flag;
u64 tcp_offset_errs;
u64 l4_pclp;
u64 pkt_truncated;
} errop;
} rx;
struct tx_stats {
u64 good;
u64 desc_fault;
u64 hdr_cons_err;
u64 subdesc_err;
u64 imm_size_oflow;
u64 data_seq_err;
u64 mem_seq_err;
u64 lock_viol;
u64 data_fault;
u64 tstmp_conflict;
u64 tstmp_timeout;
u64 mem_fault;
u64 csum_overlap;
u64 csum_overflow;
} tx;
} ____cacheline_aligned_in_smp;
enum RQ_SQ_STATS {
RQ_SQ_STATS_OCTS,
RQ_SQ_STATS_PKTS,
};
struct rx_tx_queue_stats {
u64 bytes;
u64 pkts;
} ____cacheline_aligned_in_smp;
struct q_desc_mem {
dma_addr_t dma;
u64 size;
u16 q_len;
dma_addr_t phys_base;
void *base;
void *unalign_base;
};
struct rbdr {
bool enable;
u32 dma_size;
u32 frag_len;
u32 thresh; /* Threshold level for interrupt */
void *desc;
u32 head;
u32 tail;
struct q_desc_mem dmem;
} ____cacheline_aligned_in_smp;
struct rcv_queue {
bool enable;
struct rbdr *rbdr_start;
struct rbdr *rbdr_cont;
bool en_tcp_reassembly;
u8 cq_qs; /* CQ's QS to which this RQ is assigned */
u8 cq_idx; /* CQ index (0 to 7) in the QS */
u8 cont_rbdr_qs; /* Continue buffer ptrs - QS num */
u8 cont_qs_rbdr_idx; /* RBDR idx in the cont QS */
u8 start_rbdr_qs; /* First buffer ptrs - QS num */
u8 start_qs_rbdr_idx; /* RBDR idx in the above QS */
u8 caching;
struct rx_tx_queue_stats stats;
} ____cacheline_aligned_in_smp;
struct cmp_queue {
bool enable;
u16 thresh;
spinlock_t lock; /* lock to serialize processing CQEs */
void *desc;
struct q_desc_mem dmem;
struct cmp_queue_stats stats;
} ____cacheline_aligned_in_smp;
struct snd_queue {
bool enable;
u8 cq_qs; /* CQ's QS to which this SQ is pointing */
u8 cq_idx; /* CQ index (0 to 7) in the above QS */
u16 thresh;
atomic_t free_cnt;
u32 head;
u32 tail;
u64 *skbuff;
void *desc;
#define TSO_HEADER_SIZE 128
/* For TSO segment's header */
char *tso_hdrs;
dma_addr_t tso_hdrs_phys;
cpumask_t affinity_mask;
struct q_desc_mem dmem;
struct rx_tx_queue_stats stats;
} ____cacheline_aligned_in_smp;
struct queue_set {
bool enable;
bool be_en;
u8 vnic_id;
u8 rq_cnt;
u8 cq_cnt;
u64 cq_len;
u8 sq_cnt;
u64 sq_len;
u8 rbdr_cnt;
u64 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];
} ____cacheline_aligned_in_smp;
#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_FULL BIT(26)
#define CQ_WR_DISABLE BIT(25)
#define CQ_WR_FAULT BIT(24)
#define CQ_CQE_COUNT (0xFFFF << 0)
#define CQ_ERR_MASK (CQ_WR_FULL | CQ_WR_DISABLE | CQ_WR_FAULT)
int nicvf_set_qset_resources(struct nicvf *nic);
int nicvf_config_data_transfer(struct nicvf *nic, bool enable);
void nicvf_qset_config(struct nicvf *nic, bool enable);
void nicvf_cmp_queue_config(struct nicvf *nic, struct queue_set *qs,
int qidx, bool enable);
void nicvf_sq_enable(struct nicvf *nic, struct snd_queue *sq, int qidx);
void nicvf_sq_disable(struct nicvf *nic, int qidx);
void nicvf_put_sq_desc(struct snd_queue *sq, int desc_cnt);
void nicvf_sq_free_used_descs(struct net_device *netdev,
struct snd_queue *sq, int qidx);
int nicvf_sq_append_skb(struct nicvf *nic, struct sk_buff *skb);
struct sk_buff *nicvf_get_rcv_skb(struct nicvf *nic, struct cqe_rx_t *cqe_rx);
void nicvf_rbdr_task(unsigned long data);
void nicvf_rbdr_work(struct work_struct *work);
void nicvf_enable_intr(struct nicvf *nic, int int_type, int q_idx);
void nicvf_disable_intr(struct nicvf *nic, int int_type, int q_idx);
void nicvf_clear_intr(struct nicvf *nic, int int_type, int q_idx);
int nicvf_is_intr_enabled(struct nicvf *nic, int int_type, int q_idx);
/* Register access APIs */
void nicvf_reg_write(struct nicvf *nic, u64 offset, u64 val);
u64 nicvf_reg_read(struct nicvf *nic, u64 offset);
void nicvf_qset_reg_write(struct nicvf *nic, u64 offset, u64 val);
u64 nicvf_qset_reg_read(struct nicvf *nic, u64 offset);
void nicvf_queue_reg_write(struct nicvf *nic, u64 offset,
u64 qidx, u64 val);
u64 nicvf_queue_reg_read(struct nicvf *nic,
u64 offset, u64 qidx);
/* Stats */
void nicvf_update_rq_stats(struct nicvf *nic, int rq_idx);
void nicvf_update_sq_stats(struct nicvf *nic, int sq_idx);
int nicvf_check_cqe_rx_errs(struct nicvf *nic,
struct cmp_queue *cq, struct cqe_rx_t *cqe_rx);
int nicvf_check_cqe_tx_errs(struct nicvf *nic,
struct cmp_queue *cq, struct cqe_send_t *cqe_tx);
#endif /* NICVF_QUEUES_H */
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