2 * Copyright (C) 2015 Cavium, Inc.
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.
12 #include <linux/netdevice.h>
13 #include <linux/interrupt.h>
14 #include <linux/pci.h>
15 #include "thunder_bgx.h"
18 #define PCI_DEVICE_ID_THUNDER_NIC_PF 0xA01E
19 #define PCI_DEVICE_ID_THUNDER_PASS1_NIC_VF 0x0011
20 #define PCI_DEVICE_ID_THUNDER_NIC_VF 0xA034
21 #define PCI_DEVICE_ID_THUNDER_BGX 0xA026
24 #define PCI_CFG_REG_BAR_NUM 0
25 #define PCI_MSIX_REG_BAR_NUM 4
27 /* NIC SRIOV VF count */
28 #define MAX_NUM_VFS_SUPPORTED 128
29 #define DEFAULT_NUM_VF_ENABLED 8
31 #define NIC_TNS_BYPASS_MODE 0
32 #define NIC_TNS_MODE 1
35 #define NIC_SRIOV_ENABLED BIT(0)
37 /* Min/Max packet size */
38 #define NIC_HW_MIN_FRS 64
39 #define NIC_HW_MAX_FRS 9200 /* 9216 max packet including FCS */
42 #define NIC_MAX_PKIND 16
45 /* Receive channel configuration in TNS bypass mode
46 * Below is configuration in TNS bypass mode
47 * BGX0-LMAC0-CHAN0 - VNIC CHAN0
48 * BGX0-LMAC1-CHAN0 - VNIC CHAN16
50 * BGX1-LMAC0-CHAN0 - VNIC CHAN128
52 * BGX1-LMAC3-CHAN0 - VNIC CHAN174
54 #define NIC_INTF_COUNT 2 /* Interfaces btw VNIC and TNS/BGX */
55 #define NIC_CHANS_PER_INF 128
56 #define NIC_MAX_CHANS (NIC_INTF_COUNT * NIC_CHANS_PER_INF)
57 #define NIC_CPI_COUNT 2048 /* No of channel parse indices */
59 /* TNS bypass mode: 1-1 mapping between VNIC and BGX:LMAC */
60 #define NIC_MAX_BGX MAX_BGX_PER_CN88XX
61 #define NIC_CPI_PER_BGX (NIC_CPI_COUNT / NIC_MAX_BGX)
62 #define NIC_MAX_CPI_PER_LMAC 64 /* Max when CPI_ALG is IP diffserv */
63 #define NIC_RSSI_PER_BGX (NIC_RSSI_COUNT / NIC_MAX_BGX)
66 #define NIC_MAX_TL4 1024
67 #define NIC_MAX_TL4_SHAPERS 256 /* 1 shaper for 4 TL4s */
68 #define NIC_MAX_TL3 256
69 #define NIC_MAX_TL3_SHAPERS 64 /* 1 shaper for 4 TL3s */
70 #define NIC_MAX_TL2 64
71 #define NIC_MAX_TL2_SHAPERS 2 /* 1 shaper for 32 TL2s */
75 #define NIC_TL2_PER_BGX 32
76 #define NIC_TL4_PER_BGX (NIC_MAX_TL4 / NIC_MAX_BGX)
77 #define NIC_TL4_PER_LMAC (NIC_MAX_TL4 / NIC_CHANS_PER_INF)
79 /* NIC VF Interrupts */
80 #define NICVF_INTR_CQ 0
81 #define NICVF_INTR_SQ 1
82 #define NICVF_INTR_RBDR 2
83 #define NICVF_INTR_PKT_DROP 3
84 #define NICVF_INTR_TCP_TIMER 4
85 #define NICVF_INTR_MBOX 5
86 #define NICVF_INTR_QS_ERR 6
88 #define NICVF_INTR_CQ_SHIFT 0
89 #define NICVF_INTR_SQ_SHIFT 8
90 #define NICVF_INTR_RBDR_SHIFT 16
91 #define NICVF_INTR_PKT_DROP_SHIFT 20
92 #define NICVF_INTR_TCP_TIMER_SHIFT 21
93 #define NICVF_INTR_MBOX_SHIFT 22
94 #define NICVF_INTR_QS_ERR_SHIFT 23
96 #define NICVF_INTR_CQ_MASK (0xFF << NICVF_INTR_CQ_SHIFT)
97 #define NICVF_INTR_SQ_MASK (0xFF << NICVF_INTR_SQ_SHIFT)
98 #define NICVF_INTR_RBDR_MASK (0x03 << NICVF_INTR_RBDR_SHIFT)
99 #define NICVF_INTR_PKT_DROP_MASK BIT(NICVF_INTR_PKT_DROP_SHIFT)
100 #define NICVF_INTR_TCP_TIMER_MASK BIT(NICVF_INTR_TCP_TIMER_SHIFT)
101 #define NICVF_INTR_MBOX_MASK BIT(NICVF_INTR_MBOX_SHIFT)
102 #define NICVF_INTR_QS_ERR_MASK BIT(NICVF_INTR_QS_ERR_SHIFT)
104 /* MSI-X interrupts */
105 #define NIC_PF_MSIX_VECTORS 10
106 #define NIC_VF_MSIX_VECTORS 20
108 #define NIC_PF_INTR_ID_ECC0_SBE 0
109 #define NIC_PF_INTR_ID_ECC0_DBE 1
110 #define NIC_PF_INTR_ID_ECC1_SBE 2
111 #define NIC_PF_INTR_ID_ECC1_DBE 3
112 #define NIC_PF_INTR_ID_ECC2_SBE 4
113 #define NIC_PF_INTR_ID_ECC2_DBE 5
114 #define NIC_PF_INTR_ID_ECC3_SBE 6
115 #define NIC_PF_INTR_ID_ECC3_DBE 7
116 #define NIC_PF_INTR_ID_MBOX0 8
117 #define NIC_PF_INTR_ID_MBOX1 9
119 /* Minimum FIFO level before all packets for the CQ are dropped
121 * This value ensures that once a packet has been "accepted"
122 * for reception it will not get dropped due to non-availability
123 * of CQ descriptor. An errata in HW mandates this value to be
126 #define NICPF_CQM_MIN_DROP_LEVEL 0x100
128 /* Global timer for CQ timer thresh interrupts
129 * Calculated for SCLK of 700Mhz
130 * value written should be a 1/16th of what is expected
132 * 1 tick per 0.025usec
134 #define NICPF_CLK_PER_INT_TICK 1
136 /* Time to wait before we decide that a SQ is stuck.
138 * Since both pkt rx and tx notifications are done with same CQ,
139 * when packets are being received at very high rate (eg: L2 forwarding)
140 * then freeing transmitted skbs will be delayed and watchdog
141 * will kick in, resetting interface. Hence keeping this value high.
143 #define NICVF_TX_TIMEOUT (50 * HZ)
145 struct nicvf_cq_poll {
147 u8 cq_idx; /* Completion queue index */
148 struct napi_struct napi;
151 #define NIC_RSSI_COUNT 4096 /* Total no of RSS indices */
152 #define NIC_MAX_RSS_HASH_BITS 8
153 #define NIC_MAX_RSS_IDR_TBL_SIZE (1 << NIC_MAX_RSS_HASH_BITS)
154 #define RSS_HASH_KEY_SIZE 5 /* 320 bit key */
156 struct nicvf_rss_info {
158 #define RSS_L2_EXTENDED_HASH_ENA BIT(0)
159 #define RSS_IP_HASH_ENA BIT(1)
160 #define RSS_TCP_HASH_ENA BIT(2)
161 #define RSS_TCP_SYN_DIS BIT(3)
162 #define RSS_UDP_HASH_ENA BIT(4)
163 #define RSS_L4_EXTENDED_HASH_ENA BIT(5)
164 #define RSS_ROCE_ENA BIT(6)
165 #define RSS_L3_BI_DIRECTION_ENA BIT(7)
166 #define RSS_L4_BI_DIRECTION_ENA BIT(8)
170 u8 ind_tbl[NIC_MAX_RSS_IDR_TBL_SIZE];
171 u64 key[RSS_HASH_KEY_SIZE];
172 } ____cacheline_aligned_in_smp;
174 enum rx_stats_reg_offset {
187 RX_DRP_L3BCAST = 0xc,
188 RX_DRP_L3MCAST = 0xd,
192 enum tx_stats_reg_offset {
201 struct nicvf_hw_stats {
209 u64 rx_drop_red_bytes;
211 u64 rx_drop_overrun_bytes;
214 u64 rx_drop_l3_bcast;
215 u64 rx_drop_l3_mcast;
216 u64 rx_bgx_truncated_pkts;
221 u64 rx_l2_hdr_malformed;
224 u64 rx_l2_len_mismatch;
228 u64 rx_ip_hdr_malformed;
229 u64 rx_ip_payload_malformed;
236 u64 rx_tcp_flag_errs;
237 u64 rx_tcp_offset_errs;
239 u64 rx_truncated_pkts;
242 u64 tx_ucast_frames_ok;
243 u64 tx_bcast_frames_ok;
244 u64 tx_mcast_frames_ok;
248 struct nicvf_drv_stats {
260 u64 rcv_buffer_alloc_failures;
272 struct nicvf *pnicvf;
273 struct net_device *netdev;
274 struct pci_dev *pdev;
275 void __iomem *reg_base;
276 struct queue_set *qs;
277 struct nicvf_cq_poll *napi[8];
283 /* Receive buffer alloc */
287 bool rb_work_scheduled;
288 struct page *rb_page;
289 struct delayed_work rbdr_work;
290 struct tasklet_struct rbdr_task;
294 #define MAX_SQS_PER_VF_SINGLE_NODE 5
295 #define MAX_SQS_PER_VF 11
296 struct nicvf *snicvf[MAX_SQS_PER_VF];
310 bool loopback_supported;
311 struct nicvf_rss_info rss_info;
312 struct tasklet_struct qs_err_task;
313 struct work_struct reset_task;
315 /* Interrupt coalescing settings */
316 u32 cq_coalesce_usecs;
320 struct nicvf_hw_stats hw_stats;
321 struct nicvf_drv_stats drv_stats;
322 struct bgx_stats bgx_stats;
327 struct msix_entry msix_entries[NIC_VF_MSIX_VECTORS];
328 char irq_name[NIC_VF_MSIX_VECTORS][20];
329 bool irq_allocated[NIC_VF_MSIX_VECTORS];
330 cpumask_var_t affinity_mask[NIC_VF_MSIX_VECTORS];
332 /* VF <-> PF mailbox communication */
335 bool set_mac_pending;
336 } ____cacheline_aligned_in_smp;
338 /* PF <--> VF Mailbox communication
339 * Eight 64bit registers are shared between PF and VF.
340 * Separate set for each VF.
341 * Writing '1' into last register mbx7 means end of message.
344 /* PF <--> VF mailbox communication */
345 #define NIC_PF_VF_MAILBOX_SIZE 2
346 #define NIC_MBOX_MSG_TIMEOUT 2000 /* ms */
348 /* Mailbox message types */
349 #define NIC_MBOX_MSG_READY 0x01 /* Is PF ready to rcv msgs */
350 #define NIC_MBOX_MSG_ACK 0x02 /* ACK the message received */
351 #define NIC_MBOX_MSG_NACK 0x03 /* NACK the message received */
352 #define NIC_MBOX_MSG_QS_CFG 0x04 /* Configure Qset */
353 #define NIC_MBOX_MSG_RQ_CFG 0x05 /* Configure receive queue */
354 #define NIC_MBOX_MSG_SQ_CFG 0x06 /* Configure Send queue */
355 #define NIC_MBOX_MSG_RQ_DROP_CFG 0x07 /* Configure receive queue */
356 #define NIC_MBOX_MSG_SET_MAC 0x08 /* Add MAC ID to DMAC filter */
357 #define NIC_MBOX_MSG_SET_MAX_FRS 0x09 /* Set max frame size */
358 #define NIC_MBOX_MSG_CPI_CFG 0x0A /* Config CPI, RSSI */
359 #define NIC_MBOX_MSG_RSS_SIZE 0x0B /* Get RSS indir_tbl size */
360 #define NIC_MBOX_MSG_RSS_CFG 0x0C /* Config RSS table */
361 #define NIC_MBOX_MSG_RSS_CFG_CONT 0x0D /* RSS config continuation */
362 #define NIC_MBOX_MSG_RQ_BP_CFG 0x0E /* RQ backpressure config */
363 #define NIC_MBOX_MSG_RQ_SW_SYNC 0x0F /* Flush inflight pkts to RQ */
364 #define NIC_MBOX_MSG_BGX_STATS 0x10 /* Get stats from BGX */
365 #define NIC_MBOX_MSG_BGX_LINK_CHANGE 0x11 /* BGX:LMAC link status */
366 #define NIC_MBOX_MSG_ALLOC_SQS 0x12 /* Allocate secondary Qset */
367 #define NIC_MBOX_MSG_NICVF_PTR 0x13 /* Send nicvf ptr to PF */
368 #define NIC_MBOX_MSG_PNICVF_PTR 0x14 /* Get primary qset nicvf ptr */
369 #define NIC_MBOX_MSG_SNICVF_PTR 0x15 /* Send sqet nicvf ptr to PVF */
370 #define NIC_MBOX_MSG_LOOPBACK 0x16 /* Set interface in loopback */
371 #define NIC_MBOX_MSG_CFG_DONE 0xF0 /* VF configuration done */
372 #define NIC_MBOX_MSG_SHUTDOWN 0xF1 /* VF is being shutdown */
380 u8 loopback_supported:1;
381 u8 mac_addr[ETH_ALEN];
384 /* Qset configuration */
392 /* Receive queue configuration */
400 /* Send queue configuration */
409 /* Set VF's MAC address */
413 u8 mac_addr[ETH_ALEN];
416 /* Set Maximum frame size */
423 /* Set CPI algorithm type */
431 /* Get RSS table size */
438 /* Set RSS configuration */
445 #define RSS_IND_TBL_LEN_PER_MBX_MSG 8
446 u8 ind_tbl[RSS_IND_TBL_LEN_PER_MBX_MSG];
449 struct bgx_stats_msg {
457 /* Physical interface link status */
458 struct bgx_link_status {
465 /* Get Extra Qset IDs */
480 /* Set interface in loopback mode */
481 struct set_loopback {
487 /* 128 bit shared memory between PF and each VF */
489 struct { u8 msg; } msg;
490 struct nic_cfg_msg nic_cfg;
491 struct qs_cfg_msg qs;
492 struct rq_cfg_msg rq;
493 struct sq_cfg_msg sq;
494 struct set_mac_msg mac;
495 struct set_frs_msg frs;
496 struct cpi_cfg_msg cpi_cfg;
497 struct rss_sz_msg rss_size;
498 struct rss_cfg_msg rss_cfg;
499 struct bgx_stats_msg bgx_stats;
500 struct bgx_link_status link_status;
501 struct sqs_alloc sqs_alloc;
502 struct nicvf_ptr nicvf;
503 struct set_loopback lbk;
506 #define NIC_NODE_ID_MASK 0x03
507 #define NIC_NODE_ID_SHIFT 44
509 static inline int nic_get_node_id(struct pci_dev *pdev)
511 u64 addr = pci_resource_start(pdev, PCI_CFG_REG_BAR_NUM);
512 return ((addr >> NIC_NODE_ID_SHIFT) & NIC_NODE_ID_MASK);
515 static inline bool pass1_silicon(struct pci_dev *pdev)
517 return pdev->revision < 8;
520 int nicvf_set_real_num_queues(struct net_device *netdev,
521 int tx_queues, int rx_queues);
522 int nicvf_open(struct net_device *netdev);
523 int nicvf_stop(struct net_device *netdev);
524 int nicvf_send_msg_to_pf(struct nicvf *vf, union nic_mbx *mbx);
525 void nicvf_config_rss(struct nicvf *nic);
526 void nicvf_set_rss_key(struct nicvf *nic);
527 void nicvf_set_ethtool_ops(struct net_device *netdev);
528 void nicvf_update_stats(struct nicvf *nic);
529 void nicvf_update_lmac_stats(struct nicvf *nic);