1 /* 2 * Copyright (C) 2015 Cavium, Inc. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of version 2 of the GNU General Public License 6 * as published by the Free Software Foundation. 7 */ 8 9 #ifndef NICVF_QUEUES_H 10 #define NICVF_QUEUES_H 11 12 #include <linux/netdevice.h> 13 #include "q_struct.h" 14 15 #define MAX_QUEUE_SET 128 16 #define MAX_RCV_QUEUES_PER_QS 8 17 #define MAX_RCV_BUF_DESC_RINGS_PER_QS 2 18 #define MAX_SND_QUEUES_PER_QS 8 19 #define MAX_CMP_QUEUES_PER_QS 8 20 21 /* VF's queue interrupt ranges */ 22 #define NICVF_INTR_ID_CQ 0 23 #define NICVF_INTR_ID_SQ 8 24 #define NICVF_INTR_ID_RBDR 16 25 #define NICVF_INTR_ID_MISC 18 26 #define NICVF_INTR_ID_QS_ERR 19 27 28 #define for_each_cq_irq(irq) \ 29 for (irq = NICVF_INTR_ID_CQ; irq < NICVF_INTR_ID_SQ; irq++) 30 #define for_each_sq_irq(irq) \ 31 for (irq = NICVF_INTR_ID_SQ; irq < NICVF_INTR_ID_RBDR; irq++) 32 #define for_each_rbdr_irq(irq) \ 33 for (irq = NICVF_INTR_ID_RBDR; irq < NICVF_INTR_ID_MISC; irq++) 34 35 #define RBDR_SIZE0 0ULL /* 8K entries */ 36 #define RBDR_SIZE1 1ULL /* 16K entries */ 37 #define RBDR_SIZE2 2ULL /* 32K entries */ 38 #define RBDR_SIZE3 3ULL /* 64K entries */ 39 #define RBDR_SIZE4 4ULL /* 126K entries */ 40 #define RBDR_SIZE5 5ULL /* 256K entries */ 41 #define RBDR_SIZE6 6ULL /* 512K entries */ 42 43 #define SND_QUEUE_SIZE0 0ULL /* 1K entries */ 44 #define SND_QUEUE_SIZE1 1ULL /* 2K entries */ 45 #define SND_QUEUE_SIZE2 2ULL /* 4K entries */ 46 #define SND_QUEUE_SIZE3 3ULL /* 8K entries */ 47 #define SND_QUEUE_SIZE4 4ULL /* 16K entries */ 48 #define SND_QUEUE_SIZE5 5ULL /* 32K entries */ 49 #define SND_QUEUE_SIZE6 6ULL /* 64K entries */ 50 51 #define CMP_QUEUE_SIZE0 0ULL /* 1K entries */ 52 #define CMP_QUEUE_SIZE1 1ULL /* 2K entries */ 53 #define CMP_QUEUE_SIZE2 2ULL /* 4K entries */ 54 #define CMP_QUEUE_SIZE3 3ULL /* 8K entries */ 55 #define CMP_QUEUE_SIZE4 4ULL /* 16K entries */ 56 #define CMP_QUEUE_SIZE5 5ULL /* 32K entries */ 57 #define CMP_QUEUE_SIZE6 6ULL /* 64K entries */ 58 59 /* Default queue count per QS, its lengths and threshold values */ 60 #define DEFAULT_RBDR_CNT 1 61 62 #define SND_QSIZE SND_QUEUE_SIZE2 63 #define SND_QUEUE_LEN (1ULL << (SND_QSIZE + 10)) 64 #define MAX_SND_QUEUE_LEN (1ULL << (SND_QUEUE_SIZE6 + 10)) 65 #define SND_QUEUE_THRESH 2ULL 66 #define MIN_SQ_DESC_PER_PKT_XMIT 2 67 /* Since timestamp not enabled, otherwise 2 */ 68 #define MAX_CQE_PER_PKT_XMIT 1 69 70 /* Keep CQ and SQ sizes same, if timestamping 71 * is enabled this equation will change. 72 */ 73 #define CMP_QSIZE CMP_QUEUE_SIZE2 74 #define CMP_QUEUE_LEN (1ULL << (CMP_QSIZE + 10)) 75 #define CMP_QUEUE_CQE_THRESH (NAPI_POLL_WEIGHT / 2) 76 #define CMP_QUEUE_TIMER_THRESH 80 /* ~2usec */ 77 78 #define RBDR_SIZE RBDR_SIZE0 79 #define RCV_BUF_COUNT (1ULL << (RBDR_SIZE + 13)) 80 #define MAX_RCV_BUF_COUNT (1ULL << (RBDR_SIZE6 + 13)) 81 #define RBDR_THRESH (RCV_BUF_COUNT / 2) 82 #define DMA_BUFFER_LEN 2048 /* In multiples of 128bytes */ 83 #define RCV_FRAG_LEN (SKB_DATA_ALIGN(DMA_BUFFER_LEN + NET_SKB_PAD) + \ 84 SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) 85 86 #define MAX_CQES_FOR_TX ((SND_QUEUE_LEN / MIN_SQ_DESC_PER_PKT_XMIT) * \ 87 MAX_CQE_PER_PKT_XMIT) 88 /* Calculate number of CQEs to reserve for all SQEs. 89 * Its 1/256th level of CQ size. 90 * '+ 1' to account for pipelining 91 */ 92 #define RQ_CQ_DROP ((256 / (CMP_QUEUE_LEN / \ 93 (CMP_QUEUE_LEN - MAX_CQES_FOR_TX))) + 1) 94 95 /* Descriptor size in bytes */ 96 #define SND_QUEUE_DESC_SIZE 16 97 #define CMP_QUEUE_DESC_SIZE 512 98 99 /* Buffer / descriptor alignments */ 100 #define NICVF_RCV_BUF_ALIGN 7 101 #define NICVF_RCV_BUF_ALIGN_BYTES (1ULL << NICVF_RCV_BUF_ALIGN) 102 #define NICVF_CQ_BASE_ALIGN_BYTES 512 /* 9 bits */ 103 #define NICVF_SQ_BASE_ALIGN_BYTES 128 /* 7 bits */ 104 105 #define NICVF_ALIGNED_ADDR(ADDR, ALIGN_BYTES) ALIGN(ADDR, ALIGN_BYTES) 106 107 /* Queue enable/disable */ 108 #define NICVF_SQ_EN BIT_ULL(19) 109 110 /* Queue reset */ 111 #define NICVF_CQ_RESET BIT_ULL(41) 112 #define NICVF_SQ_RESET BIT_ULL(17) 113 #define NICVF_RBDR_RESET BIT_ULL(43) 114 115 enum CQ_RX_ERRLVL_E { 116 CQ_ERRLVL_MAC, 117 CQ_ERRLVL_L2, 118 CQ_ERRLVL_L3, 119 CQ_ERRLVL_L4, 120 }; 121 122 enum CQ_RX_ERROP_E { 123 CQ_RX_ERROP_RE_NONE = 0x0, 124 CQ_RX_ERROP_RE_PARTIAL = 0x1, 125 CQ_RX_ERROP_RE_JABBER = 0x2, 126 CQ_RX_ERROP_RE_FCS = 0x7, 127 CQ_RX_ERROP_RE_TERMINATE = 0x9, 128 CQ_RX_ERROP_RE_RX_CTL = 0xb, 129 CQ_RX_ERROP_PREL2_ERR = 0x1f, 130 CQ_RX_ERROP_L2_FRAGMENT = 0x20, 131 CQ_RX_ERROP_L2_OVERRUN = 0x21, 132 CQ_RX_ERROP_L2_PFCS = 0x22, 133 CQ_RX_ERROP_L2_PUNY = 0x23, 134 CQ_RX_ERROP_L2_MAL = 0x24, 135 CQ_RX_ERROP_L2_OVERSIZE = 0x25, 136 CQ_RX_ERROP_L2_UNDERSIZE = 0x26, 137 CQ_RX_ERROP_L2_LENMISM = 0x27, 138 CQ_RX_ERROP_L2_PCLP = 0x28, 139 CQ_RX_ERROP_IP_NOT = 0x41, 140 CQ_RX_ERROP_IP_CSUM_ERR = 0x42, 141 CQ_RX_ERROP_IP_MAL = 0x43, 142 CQ_RX_ERROP_IP_MALD = 0x44, 143 CQ_RX_ERROP_IP_HOP = 0x45, 144 CQ_RX_ERROP_L3_ICRC = 0x46, 145 CQ_RX_ERROP_L3_PCLP = 0x47, 146 CQ_RX_ERROP_L4_MAL = 0x61, 147 CQ_RX_ERROP_L4_CHK = 0x62, 148 CQ_RX_ERROP_UDP_LEN = 0x63, 149 CQ_RX_ERROP_L4_PORT = 0x64, 150 CQ_RX_ERROP_TCP_FLAG = 0x65, 151 CQ_RX_ERROP_TCP_OFFSET = 0x66, 152 CQ_RX_ERROP_L4_PCLP = 0x67, 153 CQ_RX_ERROP_RBDR_TRUNC = 0x70, 154 }; 155 156 enum CQ_TX_ERROP_E { 157 CQ_TX_ERROP_GOOD = 0x0, 158 CQ_TX_ERROP_DESC_FAULT = 0x10, 159 CQ_TX_ERROP_HDR_CONS_ERR = 0x11, 160 CQ_TX_ERROP_SUBDC_ERR = 0x12, 161 CQ_TX_ERROP_IMM_SIZE_OFLOW = 0x80, 162 CQ_TX_ERROP_DATA_SEQUENCE_ERR = 0x81, 163 CQ_TX_ERROP_MEM_SEQUENCE_ERR = 0x82, 164 CQ_TX_ERROP_LOCK_VIOL = 0x83, 165 CQ_TX_ERROP_DATA_FAULT = 0x84, 166 CQ_TX_ERROP_TSTMP_CONFLICT = 0x85, 167 CQ_TX_ERROP_TSTMP_TIMEOUT = 0x86, 168 CQ_TX_ERROP_MEM_FAULT = 0x87, 169 CQ_TX_ERROP_CK_OVERLAP = 0x88, 170 CQ_TX_ERROP_CK_OFLOW = 0x89, 171 CQ_TX_ERROP_ENUM_LAST = 0x8a, 172 }; 173 174 struct cmp_queue_stats { 175 struct tx_stats { 176 u64 good; 177 u64 desc_fault; 178 u64 hdr_cons_err; 179 u64 subdesc_err; 180 u64 imm_size_oflow; 181 u64 data_seq_err; 182 u64 mem_seq_err; 183 u64 lock_viol; 184 u64 data_fault; 185 u64 tstmp_conflict; 186 u64 tstmp_timeout; 187 u64 mem_fault; 188 u64 csum_overlap; 189 u64 csum_overflow; 190 } tx; 191 } ____cacheline_aligned_in_smp; 192 193 enum RQ_SQ_STATS { 194 RQ_SQ_STATS_OCTS, 195 RQ_SQ_STATS_PKTS, 196 }; 197 198 struct rx_tx_queue_stats { 199 u64 bytes; 200 u64 pkts; 201 } ____cacheline_aligned_in_smp; 202 203 struct q_desc_mem { 204 dma_addr_t dma; 205 u64 size; 206 u16 q_len; 207 dma_addr_t phys_base; 208 void *base; 209 void *unalign_base; 210 }; 211 212 struct rbdr { 213 bool enable; 214 u32 dma_size; 215 u32 frag_len; 216 u32 thresh; /* Threshold level for interrupt */ 217 void *desc; 218 u32 head; 219 u32 tail; 220 struct q_desc_mem dmem; 221 } ____cacheline_aligned_in_smp; 222 223 struct rcv_queue { 224 bool enable; 225 struct rbdr *rbdr_start; 226 struct rbdr *rbdr_cont; 227 bool en_tcp_reassembly; 228 u8 cq_qs; /* CQ's QS to which this RQ is assigned */ 229 u8 cq_idx; /* CQ index (0 to 7) in the QS */ 230 u8 cont_rbdr_qs; /* Continue buffer ptrs - QS num */ 231 u8 cont_qs_rbdr_idx; /* RBDR idx in the cont QS */ 232 u8 start_rbdr_qs; /* First buffer ptrs - QS num */ 233 u8 start_qs_rbdr_idx; /* RBDR idx in the above QS */ 234 u8 caching; 235 struct rx_tx_queue_stats stats; 236 } ____cacheline_aligned_in_smp; 237 238 struct cmp_queue { 239 bool enable; 240 u16 thresh; 241 spinlock_t lock; /* lock to serialize processing CQEs */ 242 void *desc; 243 struct q_desc_mem dmem; 244 struct cmp_queue_stats stats; 245 int irq; 246 } ____cacheline_aligned_in_smp; 247 248 struct snd_queue { 249 bool enable; 250 u8 cq_qs; /* CQ's QS to which this SQ is pointing */ 251 u8 cq_idx; /* CQ index (0 to 7) in the above QS */ 252 u16 thresh; 253 atomic_t free_cnt; 254 u32 head; 255 u32 tail; 256 u64 *skbuff; 257 void *desc; 258 259 #define TSO_HEADER_SIZE 128 260 /* For TSO segment's header */ 261 char *tso_hdrs; 262 dma_addr_t tso_hdrs_phys; 263 264 cpumask_t affinity_mask; 265 struct q_desc_mem dmem; 266 struct rx_tx_queue_stats stats; 267 } ____cacheline_aligned_in_smp; 268 269 struct queue_set { 270 bool enable; 271 bool be_en; 272 u8 vnic_id; 273 u8 rq_cnt; 274 u8 cq_cnt; 275 u64 cq_len; 276 u8 sq_cnt; 277 u64 sq_len; 278 u8 rbdr_cnt; 279 u64 rbdr_len; 280 struct rcv_queue rq[MAX_RCV_QUEUES_PER_QS]; 281 struct cmp_queue cq[MAX_CMP_QUEUES_PER_QS]; 282 struct snd_queue sq[MAX_SND_QUEUES_PER_QS]; 283 struct rbdr rbdr[MAX_RCV_BUF_DESC_RINGS_PER_QS]; 284 } ____cacheline_aligned_in_smp; 285 286 #define GET_RBDR_DESC(RING, idx)\ 287 (&(((struct rbdr_entry_t *)((RING)->desc))[idx])) 288 #define GET_SQ_DESC(RING, idx)\ 289 (&(((struct sq_hdr_subdesc *)((RING)->desc))[idx])) 290 #define GET_CQ_DESC(RING, idx)\ 291 (&(((union cq_desc_t *)((RING)->desc))[idx])) 292 293 /* CQ status bits */ 294 #define CQ_WR_FULL BIT(26) 295 #define CQ_WR_DISABLE BIT(25) 296 #define CQ_WR_FAULT BIT(24) 297 #define CQ_CQE_COUNT (0xFFFF << 0) 298 299 #define CQ_ERR_MASK (CQ_WR_FULL | CQ_WR_DISABLE | CQ_WR_FAULT) 300 301 void nicvf_config_vlan_stripping(struct nicvf *nic, 302 netdev_features_t features); 303 int nicvf_set_qset_resources(struct nicvf *nic); 304 int nicvf_config_data_transfer(struct nicvf *nic, bool enable); 305 void nicvf_qset_config(struct nicvf *nic, bool enable); 306 void nicvf_cmp_queue_config(struct nicvf *nic, struct queue_set *qs, 307 int qidx, bool enable); 308 309 void nicvf_sq_enable(struct nicvf *nic, struct snd_queue *sq, int qidx); 310 void nicvf_sq_disable(struct nicvf *nic, int qidx); 311 void nicvf_put_sq_desc(struct snd_queue *sq, int desc_cnt); 312 void nicvf_sq_free_used_descs(struct net_device *netdev, 313 struct snd_queue *sq, int qidx); 314 int nicvf_sq_append_skb(struct nicvf *nic, struct sk_buff *skb); 315 316 struct sk_buff *nicvf_get_rcv_skb(struct nicvf *nic, struct cqe_rx_t *cqe_rx); 317 void nicvf_rbdr_task(unsigned long data); 318 void nicvf_rbdr_work(struct work_struct *work); 319 320 void nicvf_enable_intr(struct nicvf *nic, int int_type, int q_idx); 321 void nicvf_disable_intr(struct nicvf *nic, int int_type, int q_idx); 322 void nicvf_clear_intr(struct nicvf *nic, int int_type, int q_idx); 323 int nicvf_is_intr_enabled(struct nicvf *nic, int int_type, int q_idx); 324 325 /* Register access APIs */ 326 void nicvf_reg_write(struct nicvf *nic, u64 offset, u64 val); 327 u64 nicvf_reg_read(struct nicvf *nic, u64 offset); 328 void nicvf_qset_reg_write(struct nicvf *nic, u64 offset, u64 val); 329 u64 nicvf_qset_reg_read(struct nicvf *nic, u64 offset); 330 void nicvf_queue_reg_write(struct nicvf *nic, u64 offset, 331 u64 qidx, u64 val); 332 u64 nicvf_queue_reg_read(struct nicvf *nic, 333 u64 offset, u64 qidx); 334 335 /* Stats */ 336 void nicvf_update_rq_stats(struct nicvf *nic, int rq_idx); 337 void nicvf_update_sq_stats(struct nicvf *nic, int sq_idx); 338 int nicvf_check_cqe_rx_errs(struct nicvf *nic, struct cqe_rx_t *cqe_rx); 339 int nicvf_check_cqe_tx_errs(struct nicvf *nic, 340 struct cmp_queue *cq, struct cqe_send_t *cqe_tx); 341 #endif /* NICVF_QUEUES_H */ 342