1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2015 Cavium, Inc. 4 */ 5 6 #ifndef NICVF_QUEUES_H 7 #define NICVF_QUEUES_H 8 9 #include <linux/netdevice.h> 10 #include <linux/iommu.h> 11 #include <net/xdp.h> 12 #include "q_struct.h" 13 14 #define MAX_QUEUE_SET 128 15 #define MAX_RCV_QUEUES_PER_QS 8 16 #define MAX_RCV_BUF_DESC_RINGS_PER_QS 2 17 #define MAX_SND_QUEUES_PER_QS 8 18 #define MAX_CMP_QUEUES_PER_QS 8 19 20 /* VF's queue interrupt ranges */ 21 #define NICVF_INTR_ID_CQ 0 22 #define NICVF_INTR_ID_SQ 8 23 #define NICVF_INTR_ID_RBDR 16 24 #define NICVF_INTR_ID_MISC 18 25 #define NICVF_INTR_ID_QS_ERR 19 26 27 #define for_each_cq_irq(irq) \ 28 for (irq = NICVF_INTR_ID_CQ; irq < NICVF_INTR_ID_SQ; irq++) 29 #define for_each_sq_irq(irq) \ 30 for (irq = NICVF_INTR_ID_SQ; irq < NICVF_INTR_ID_RBDR; irq++) 31 #define for_each_rbdr_irq(irq) \ 32 for (irq = NICVF_INTR_ID_RBDR; irq < NICVF_INTR_ID_MISC; irq++) 33 34 #define RBDR_SIZE0 0ULL /* 8K entries */ 35 #define RBDR_SIZE1 1ULL /* 16K entries */ 36 #define RBDR_SIZE2 2ULL /* 32K entries */ 37 #define RBDR_SIZE3 3ULL /* 64K entries */ 38 #define RBDR_SIZE4 4ULL /* 126K entries */ 39 #define RBDR_SIZE5 5ULL /* 256K entries */ 40 #define RBDR_SIZE6 6ULL /* 512K entries */ 41 42 #define SND_QUEUE_SIZE0 0ULL /* 1K entries */ 43 #define SND_QUEUE_SIZE1 1ULL /* 2K entries */ 44 #define SND_QUEUE_SIZE2 2ULL /* 4K entries */ 45 #define SND_QUEUE_SIZE3 3ULL /* 8K entries */ 46 #define SND_QUEUE_SIZE4 4ULL /* 16K entries */ 47 #define SND_QUEUE_SIZE5 5ULL /* 32K entries */ 48 #define SND_QUEUE_SIZE6 6ULL /* 64K entries */ 49 50 #define CMP_QUEUE_SIZE0 0ULL /* 1K entries */ 51 #define CMP_QUEUE_SIZE1 1ULL /* 2K entries */ 52 #define CMP_QUEUE_SIZE2 2ULL /* 4K entries */ 53 #define CMP_QUEUE_SIZE3 3ULL /* 8K entries */ 54 #define CMP_QUEUE_SIZE4 4ULL /* 16K entries */ 55 #define CMP_QUEUE_SIZE5 5ULL /* 32K entries */ 56 #define CMP_QUEUE_SIZE6 6ULL /* 64K entries */ 57 58 /* Default queue count per QS, its lengths and threshold values */ 59 #define DEFAULT_RBDR_CNT 1 60 61 #define SND_QSIZE SND_QUEUE_SIZE0 62 #define SND_QUEUE_LEN (1ULL << (SND_QSIZE + 10)) 63 #define MIN_SND_QUEUE_LEN (1ULL << (SND_QUEUE_SIZE0 + 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_SIZE0 74 #define CMP_QUEUE_LEN (1ULL << (CMP_QSIZE + 10)) 75 #define MIN_CMP_QUEUE_LEN (1ULL << (CMP_QUEUE_SIZE0 + 10)) 76 #define MAX_CMP_QUEUE_LEN (1ULL << (CMP_QUEUE_SIZE6 + 10)) 77 #define CMP_QUEUE_CQE_THRESH (NAPI_POLL_WEIGHT / 2) 78 #define CMP_QUEUE_TIMER_THRESH 80 /* ~2usec */ 79 80 /* No of CQEs that might anyway gets used by HW due to pipelining 81 * effects irrespective of PASS/DROP/LEVELS being configured 82 */ 83 #define CMP_QUEUE_PIPELINE_RSVD 544 84 85 #define RBDR_SIZE RBDR_SIZE0 86 #define RCV_BUF_COUNT (1ULL << (RBDR_SIZE + 13)) 87 #define MAX_RCV_BUF_COUNT (1ULL << (RBDR_SIZE6 + 13)) 88 #define RBDR_THRESH (RCV_BUF_COUNT / 2) 89 #define DMA_BUFFER_LEN 1536 /* In multiples of 128bytes */ 90 #define RCV_FRAG_LEN (SKB_DATA_ALIGN(DMA_BUFFER_LEN + NET_SKB_PAD) + \ 91 SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) 92 93 #define MAX_CQES_FOR_TX ((SND_QUEUE_LEN / MIN_SQ_DESC_PER_PKT_XMIT) * \ 94 MAX_CQE_PER_PKT_XMIT) 95 96 /* RED and Backpressure levels of CQ for pkt reception 97 * For CQ, level is a measure of emptiness i.e 0x0 means full 98 * eg: For CQ of size 4K, and for pass/drop levels of 160/144 99 * HW accepts pkt if unused CQE >= 2560 100 * RED accepts pkt if unused CQE < 2304 & >= 2560 101 * DROPs pkts if unused CQE < 2304 102 */ 103 #define RQ_PASS_CQ_LVL 224ULL 104 #define RQ_DROP_CQ_LVL 216ULL 105 106 /* RED and Backpressure levels of RBDR for pkt reception 107 * For RBDR, level is a measure of fullness i.e 0x0 means empty 108 * eg: For RBDR of size 8K, and for pass/drop levels of 4/0 109 * HW accepts pkt if unused RBs >= 256 110 * RED accepts pkt if unused RBs < 256 & >= 0 111 * DROPs pkts if unused RBs < 0 112 */ 113 #define RQ_PASS_RBDR_LVL 8ULL 114 #define RQ_DROP_RBDR_LVL 0ULL 115 116 /* Descriptor size in bytes */ 117 #define SND_QUEUE_DESC_SIZE 16 118 #define CMP_QUEUE_DESC_SIZE 512 119 120 /* Buffer / descriptor alignments */ 121 #define NICVF_RCV_BUF_ALIGN 7 122 #define NICVF_RCV_BUF_ALIGN_BYTES (1ULL << NICVF_RCV_BUF_ALIGN) 123 #define NICVF_CQ_BASE_ALIGN_BYTES 512 /* 9 bits */ 124 #define NICVF_SQ_BASE_ALIGN_BYTES 128 /* 7 bits */ 125 126 #define NICVF_ALIGNED_ADDR(ADDR, ALIGN_BYTES) ALIGN(ADDR, ALIGN_BYTES) 127 128 /* Queue enable/disable */ 129 #define NICVF_SQ_EN BIT_ULL(19) 130 131 /* Queue reset */ 132 #define NICVF_CQ_RESET BIT_ULL(41) 133 #define NICVF_SQ_RESET BIT_ULL(17) 134 #define NICVF_RBDR_RESET BIT_ULL(43) 135 136 enum CQ_RX_ERRLVL_E { 137 CQ_ERRLVL_MAC, 138 CQ_ERRLVL_L2, 139 CQ_ERRLVL_L3, 140 CQ_ERRLVL_L4, 141 }; 142 143 enum CQ_RX_ERROP_E { 144 CQ_RX_ERROP_RE_NONE = 0x0, 145 CQ_RX_ERROP_RE_PARTIAL = 0x1, 146 CQ_RX_ERROP_RE_JABBER = 0x2, 147 CQ_RX_ERROP_RE_FCS = 0x7, 148 CQ_RX_ERROP_RE_TERMINATE = 0x9, 149 CQ_RX_ERROP_RE_RX_CTL = 0xb, 150 CQ_RX_ERROP_PREL2_ERR = 0x1f, 151 CQ_RX_ERROP_L2_FRAGMENT = 0x20, 152 CQ_RX_ERROP_L2_OVERRUN = 0x21, 153 CQ_RX_ERROP_L2_PFCS = 0x22, 154 CQ_RX_ERROP_L2_PUNY = 0x23, 155 CQ_RX_ERROP_L2_MAL = 0x24, 156 CQ_RX_ERROP_L2_OVERSIZE = 0x25, 157 CQ_RX_ERROP_L2_UNDERSIZE = 0x26, 158 CQ_RX_ERROP_L2_LENMISM = 0x27, 159 CQ_RX_ERROP_L2_PCLP = 0x28, 160 CQ_RX_ERROP_IP_NOT = 0x41, 161 CQ_RX_ERROP_IP_CSUM_ERR = 0x42, 162 CQ_RX_ERROP_IP_MAL = 0x43, 163 CQ_RX_ERROP_IP_MALD = 0x44, 164 CQ_RX_ERROP_IP_HOP = 0x45, 165 CQ_RX_ERROP_L3_ICRC = 0x46, 166 CQ_RX_ERROP_L3_PCLP = 0x47, 167 CQ_RX_ERROP_L4_MAL = 0x61, 168 CQ_RX_ERROP_L4_CHK = 0x62, 169 CQ_RX_ERROP_UDP_LEN = 0x63, 170 CQ_RX_ERROP_L4_PORT = 0x64, 171 CQ_RX_ERROP_TCP_FLAG = 0x65, 172 CQ_RX_ERROP_TCP_OFFSET = 0x66, 173 CQ_RX_ERROP_L4_PCLP = 0x67, 174 CQ_RX_ERROP_RBDR_TRUNC = 0x70, 175 }; 176 177 enum CQ_TX_ERROP_E { 178 CQ_TX_ERROP_GOOD = 0x0, 179 CQ_TX_ERROP_DESC_FAULT = 0x10, 180 CQ_TX_ERROP_HDR_CONS_ERR = 0x11, 181 CQ_TX_ERROP_SUBDC_ERR = 0x12, 182 CQ_TX_ERROP_MAX_SIZE_VIOL = 0x13, 183 CQ_TX_ERROP_IMM_SIZE_OFLOW = 0x80, 184 CQ_TX_ERROP_DATA_SEQUENCE_ERR = 0x81, 185 CQ_TX_ERROP_MEM_SEQUENCE_ERR = 0x82, 186 CQ_TX_ERROP_LOCK_VIOL = 0x83, 187 CQ_TX_ERROP_DATA_FAULT = 0x84, 188 CQ_TX_ERROP_TSTMP_CONFLICT = 0x85, 189 CQ_TX_ERROP_TSTMP_TIMEOUT = 0x86, 190 CQ_TX_ERROP_MEM_FAULT = 0x87, 191 CQ_TX_ERROP_CK_OVERLAP = 0x88, 192 CQ_TX_ERROP_CK_OFLOW = 0x89, 193 CQ_TX_ERROP_ENUM_LAST = 0x8a, 194 }; 195 196 enum RQ_SQ_STATS { 197 RQ_SQ_STATS_OCTS, 198 RQ_SQ_STATS_PKTS, 199 }; 200 201 struct rx_tx_queue_stats { 202 u64 bytes; 203 u64 pkts; 204 } ____cacheline_aligned_in_smp; 205 206 struct q_desc_mem { 207 dma_addr_t dma; 208 u64 size; 209 u32 q_len; 210 dma_addr_t phys_base; 211 void *base; 212 void *unalign_base; 213 }; 214 215 struct pgcache { 216 struct page *page; 217 int ref_count; 218 u64 dma_addr; 219 }; 220 221 struct rbdr { 222 bool enable; 223 u32 dma_size; 224 u32 frag_len; 225 u32 thresh; /* Threshold level for interrupt */ 226 void *desc; 227 u32 head; 228 u32 tail; 229 struct q_desc_mem dmem; 230 bool is_xdp; 231 232 /* For page recycling */ 233 int pgidx; 234 int pgcnt; 235 int pgalloc; 236 struct pgcache *pgcache; 237 } ____cacheline_aligned_in_smp; 238 239 struct rcv_queue { 240 bool enable; 241 struct rbdr *rbdr_start; 242 struct rbdr *rbdr_cont; 243 bool en_tcp_reassembly; 244 u8 cq_qs; /* CQ's QS to which this RQ is assigned */ 245 u8 cq_idx; /* CQ index (0 to 7) in the QS */ 246 u8 cont_rbdr_qs; /* Continue buffer ptrs - QS num */ 247 u8 cont_qs_rbdr_idx; /* RBDR idx in the cont QS */ 248 u8 start_rbdr_qs; /* First buffer ptrs - QS num */ 249 u8 start_qs_rbdr_idx; /* RBDR idx in the above QS */ 250 u8 caching; 251 struct rx_tx_queue_stats stats; 252 struct xdp_rxq_info xdp_rxq; 253 } ____cacheline_aligned_in_smp; 254 255 struct cmp_queue { 256 bool enable; 257 u16 thresh; 258 spinlock_t lock; /* lock to serialize processing CQEs */ 259 void *desc; 260 struct q_desc_mem dmem; 261 int irq; 262 } ____cacheline_aligned_in_smp; 263 264 struct snd_queue { 265 bool enable; 266 u8 cq_qs; /* CQ's QS to which this SQ is pointing */ 267 u8 cq_idx; /* CQ index (0 to 7) in the above QS */ 268 u16 thresh; 269 atomic_t free_cnt; 270 u32 head; 271 u32 tail; 272 u64 *skbuff; 273 void *desc; 274 u64 *xdp_page; 275 u16 xdp_desc_cnt; 276 u16 xdp_free_cnt; 277 bool is_xdp; 278 279 /* For TSO segment's header */ 280 char *tso_hdrs; 281 dma_addr_t tso_hdrs_phys; 282 283 cpumask_t affinity_mask; 284 struct q_desc_mem dmem; 285 struct rx_tx_queue_stats stats; 286 } ____cacheline_aligned_in_smp; 287 288 struct queue_set { 289 bool enable; 290 bool be_en; 291 u8 vnic_id; 292 u8 rq_cnt; 293 u8 cq_cnt; 294 u64 cq_len; 295 u8 sq_cnt; 296 u64 sq_len; 297 u8 rbdr_cnt; 298 u64 rbdr_len; 299 struct rcv_queue rq[MAX_RCV_QUEUES_PER_QS]; 300 struct cmp_queue cq[MAX_CMP_QUEUES_PER_QS]; 301 struct snd_queue sq[MAX_SND_QUEUES_PER_QS]; 302 struct rbdr rbdr[MAX_RCV_BUF_DESC_RINGS_PER_QS]; 303 } ____cacheline_aligned_in_smp; 304 305 #define GET_RBDR_DESC(RING, idx)\ 306 (&(((struct rbdr_entry_t *)((RING)->desc))[idx])) 307 #define GET_SQ_DESC(RING, idx)\ 308 (&(((struct sq_hdr_subdesc *)((RING)->desc))[idx])) 309 #define GET_CQ_DESC(RING, idx)\ 310 (&(((union cq_desc_t *)((RING)->desc))[idx])) 311 312 /* CQ status bits */ 313 #define CQ_WR_FULL BIT(26) 314 #define CQ_WR_DISABLE BIT(25) 315 #define CQ_WR_FAULT BIT(24) 316 #define CQ_CQE_COUNT (0xFFFF << 0) 317 318 #define CQ_ERR_MASK (CQ_WR_FULL | CQ_WR_DISABLE | CQ_WR_FAULT) 319 nicvf_iova_to_phys(struct nicvf * nic,dma_addr_t dma_addr)320 static inline u64 nicvf_iova_to_phys(struct nicvf *nic, dma_addr_t dma_addr) 321 { 322 /* Translation is installed only when IOMMU is present */ 323 if (nic->iommu_domain) 324 return iommu_iova_to_phys(nic->iommu_domain, dma_addr); 325 return dma_addr; 326 } 327 328 void nicvf_unmap_sndq_buffers(struct nicvf *nic, struct snd_queue *sq, 329 int hdr_sqe, u8 subdesc_cnt); 330 void nicvf_config_vlan_stripping(struct nicvf *nic, 331 netdev_features_t features); 332 int nicvf_set_qset_resources(struct nicvf *nic); 333 int nicvf_config_data_transfer(struct nicvf *nic, bool enable); 334 void nicvf_qset_config(struct nicvf *nic, bool enable); 335 void nicvf_cmp_queue_config(struct nicvf *nic, struct queue_set *qs, 336 int qidx, bool enable); 337 338 void nicvf_sq_enable(struct nicvf *nic, struct snd_queue *sq, int qidx); 339 void nicvf_sq_disable(struct nicvf *nic, int qidx); 340 void nicvf_put_sq_desc(struct snd_queue *sq, int desc_cnt); 341 void nicvf_sq_free_used_descs(struct net_device *netdev, 342 struct snd_queue *sq, int qidx); 343 int nicvf_sq_append_skb(struct nicvf *nic, struct snd_queue *sq, 344 struct sk_buff *skb, u8 sq_num); 345 int nicvf_xdp_sq_append_pkt(struct nicvf *nic, struct snd_queue *sq, 346 u64 bufaddr, u64 dma_addr, u16 len); 347 void nicvf_xdp_sq_doorbell(struct nicvf *nic, struct snd_queue *sq, int sq_num); 348 349 struct sk_buff *nicvf_get_rcv_skb(struct nicvf *nic, 350 struct cqe_rx_t *cqe_rx, bool xdp); 351 void nicvf_rbdr_task(struct tasklet_struct *t); 352 void nicvf_rbdr_work(struct work_struct *work); 353 354 void nicvf_enable_intr(struct nicvf *nic, int int_type, int q_idx); 355 void nicvf_disable_intr(struct nicvf *nic, int int_type, int q_idx); 356 void nicvf_clear_intr(struct nicvf *nic, int int_type, int q_idx); 357 int nicvf_is_intr_enabled(struct nicvf *nic, int int_type, int q_idx); 358 359 /* Register access APIs */ 360 void nicvf_reg_write(struct nicvf *nic, u64 offset, u64 val); 361 u64 nicvf_reg_read(struct nicvf *nic, u64 offset); 362 void nicvf_qset_reg_write(struct nicvf *nic, u64 offset, u64 val); 363 u64 nicvf_qset_reg_read(struct nicvf *nic, u64 offset); 364 void nicvf_queue_reg_write(struct nicvf *nic, u64 offset, 365 u64 qidx, u64 val); 366 u64 nicvf_queue_reg_read(struct nicvf *nic, 367 u64 offset, u64 qidx); 368 369 /* Stats */ 370 void nicvf_update_rq_stats(struct nicvf *nic, int rq_idx); 371 void nicvf_update_sq_stats(struct nicvf *nic, int sq_idx); 372 int nicvf_check_cqe_rx_errs(struct nicvf *nic, struct cqe_rx_t *cqe_rx); 373 int nicvf_check_cqe_tx_errs(struct nicvf *nic, struct cqe_send_t *cqe_tx); 374 #endif /* NICVF_QUEUES_H */ 375