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 /* Global timer for CQ timer thresh interrupts
120 * Calculated for SCLK of 700Mhz
121 * value written should be a 1/16th of what is expected
123 * 1 tick per 0.05usec = value of 2.2
124 * This 10% would be covered in CQ timer thresh value
126 #define NICPF_CLK_PER_INT_TICK 2
128 /* Time to wait before we decide that a SQ is stuck.
130 * Since both pkt rx and tx notifications are done with same CQ,
131 * when packets are being received at very high rate (eg: L2 forwarding)
132 * then freeing transmitted skbs will be delayed and watchdog
133 * will kick in, resetting interface. Hence keeping this value high.
135 #define NICVF_TX_TIMEOUT (50 * HZ)
137 struct nicvf_cq_poll {
138 u8 cq_idx; /* Completion queue index */
139 struct napi_struct napi;
142 #define NIC_RSSI_COUNT 4096 /* Total no of RSS indices */
143 #define NIC_MAX_RSS_HASH_BITS 8
144 #define NIC_MAX_RSS_IDR_TBL_SIZE (1 << NIC_MAX_RSS_HASH_BITS)
145 #define RSS_HASH_KEY_SIZE 5 /* 320 bit key */
147 struct nicvf_rss_info {
149 #define RSS_L2_EXTENDED_HASH_ENA BIT(0)
150 #define RSS_IP_HASH_ENA BIT(1)
151 #define RSS_TCP_HASH_ENA BIT(2)
152 #define RSS_TCP_SYN_DIS BIT(3)
153 #define RSS_UDP_HASH_ENA BIT(4)
154 #define RSS_L4_EXTENDED_HASH_ENA BIT(5)
155 #define RSS_ROCE_ENA BIT(6)
156 #define RSS_L3_BI_DIRECTION_ENA BIT(7)
157 #define RSS_L4_BI_DIRECTION_ENA BIT(8)
161 u8 ind_tbl[NIC_MAX_RSS_IDR_TBL_SIZE];
162 u64 key[RSS_HASH_KEY_SIZE];
163 } ____cacheline_aligned_in_smp;
165 enum rx_stats_reg_offset {
178 RX_DRP_L3BCAST = 0xc,
179 RX_DRP_L3MCAST = 0xd,
183 enum tx_stats_reg_offset {
192 struct nicvf_hw_stats {
194 u64 rx_ucast_frames_ok;
195 u64 rx_bcast_frames_ok;
196 u64 rx_mcast_frames_ok;
200 u64 rx_drop_red_bytes;
202 u64 rx_drop_overrun_bytes;
205 u64 rx_drop_l3_bcast;
206 u64 rx_drop_l3_mcast;
208 u64 tx_ucast_frames_ok;
209 u64 tx_bcast_frames_ok;
210 u64 tx_mcast_frames_ok;
214 struct nicvf_drv_stats {
234 struct net_device *netdev;
235 struct pci_dev *pdev;
240 struct queue_set *qs;
241 void __iomem *reg_base;
245 struct page *rb_page;
248 bool rb_work_scheduled;
249 struct delayed_work rbdr_work;
250 struct tasklet_struct rbdr_task;
251 struct tasklet_struct qs_err_task;
252 struct tasklet_struct cq_task;
253 struct nicvf_cq_poll *napi[8];
254 struct nicvf_rss_info rss_info;
256 /* Interrupt coalescing settings */
257 u32 cq_coalesce_usecs;
260 struct nicvf_hw_stats stats;
261 struct nicvf_drv_stats drv_stats;
262 struct bgx_stats bgx_stats;
263 struct work_struct reset_task;
268 struct msix_entry msix_entries[NIC_VF_MSIX_VECTORS];
269 char irq_name[NIC_VF_MSIX_VECTORS][20];
270 bool irq_allocated[NIC_VF_MSIX_VECTORS];
272 bool pf_ready_to_rcv_msg;
275 bool bgx_stats_acked;
276 bool set_mac_pending;
277 } ____cacheline_aligned_in_smp;
279 /* PF <--> VF Mailbox communication
280 * Eight 64bit registers are shared between PF and VF.
281 * Separate set for each VF.
282 * Writing '1' into last register mbx7 means end of message.
285 /* PF <--> VF mailbox communication */
286 #define NIC_PF_VF_MAILBOX_SIZE 2
287 #define NIC_MBOX_MSG_TIMEOUT 2000 /* ms */
289 /* Mailbox message types */
290 #define NIC_MBOX_MSG_READY 0x01 /* Is PF ready to rcv msgs */
291 #define NIC_MBOX_MSG_ACK 0x02 /* ACK the message received */
292 #define NIC_MBOX_MSG_NACK 0x03 /* NACK the message received */
293 #define NIC_MBOX_MSG_QS_CFG 0x04 /* Configure Qset */
294 #define NIC_MBOX_MSG_RQ_CFG 0x05 /* Configure receive queue */
295 #define NIC_MBOX_MSG_SQ_CFG 0x06 /* Configure Send queue */
296 #define NIC_MBOX_MSG_RQ_DROP_CFG 0x07 /* Configure receive queue */
297 #define NIC_MBOX_MSG_SET_MAC 0x08 /* Add MAC ID to DMAC filter */
298 #define NIC_MBOX_MSG_SET_MAX_FRS 0x09 /* Set max frame size */
299 #define NIC_MBOX_MSG_CPI_CFG 0x0A /* Config CPI, RSSI */
300 #define NIC_MBOX_MSG_RSS_SIZE 0x0B /* Get RSS indir_tbl size */
301 #define NIC_MBOX_MSG_RSS_CFG 0x0C /* Config RSS table */
302 #define NIC_MBOX_MSG_RSS_CFG_CONT 0x0D /* RSS config continuation */
303 #define NIC_MBOX_MSG_RQ_BP_CFG 0x0E /* RQ backpressure config */
304 #define NIC_MBOX_MSG_RQ_SW_SYNC 0x0F /* Flush inflight pkts to RQ */
305 #define NIC_MBOX_MSG_BGX_STATS 0x10 /* Get stats from BGX */
306 #define NIC_MBOX_MSG_BGX_LINK_CHANGE 0x11 /* BGX:LMAC link status */
307 #define NIC_MBOX_MSG_CFG_DONE 0x12 /* VF configuration done */
308 #define NIC_MBOX_MSG_SHUTDOWN 0x13 /* VF is being shutdown */
315 u8 mac_addr[ETH_ALEN];
318 /* Qset configuration */
325 /* Receive queue configuration */
333 /* Send queue configuration */
341 /* Set VF's MAC address */
345 u8 mac_addr[ETH_ALEN];
348 /* Set Maximum frame size */
355 /* Set CPI algorithm type */
363 /* Get RSS table size */
370 /* Set RSS configuration */
377 #define RSS_IND_TBL_LEN_PER_MBX_MSG 8
378 u8 ind_tbl[RSS_IND_TBL_LEN_PER_MBX_MSG];
381 struct bgx_stats_msg {
389 /* Physical interface link status */
390 struct bgx_link_status {
397 /* 128 bit shared memory between PF and each VF */
399 struct { u8 msg; } msg;
400 struct nic_cfg_msg nic_cfg;
401 struct qs_cfg_msg qs;
402 struct rq_cfg_msg rq;
403 struct sq_cfg_msg sq;
404 struct set_mac_msg mac;
405 struct set_frs_msg frs;
406 struct cpi_cfg_msg cpi_cfg;
407 struct rss_sz_msg rss_size;
408 struct rss_cfg_msg rss_cfg;
409 struct bgx_stats_msg bgx_stats;
410 struct bgx_link_status link_status;
413 #define NIC_NODE_ID_MASK 0x03
414 #define NIC_NODE_ID_SHIFT 44
416 static inline int nic_get_node_id(struct pci_dev *pdev)
418 u64 addr = pci_resource_start(pdev, PCI_CFG_REG_BAR_NUM);
419 return ((addr >> NIC_NODE_ID_SHIFT) & NIC_NODE_ID_MASK);
422 int nicvf_set_real_num_queues(struct net_device *netdev,
423 int tx_queues, int rx_queues);
424 int nicvf_open(struct net_device *netdev);
425 int nicvf_stop(struct net_device *netdev);
426 int nicvf_send_msg_to_pf(struct nicvf *vf, union nic_mbx *mbx);
427 void nicvf_config_rss(struct nicvf *nic);
428 void nicvf_set_rss_key(struct nicvf *nic);
429 void nicvf_set_ethtool_ops(struct net_device *netdev);
430 void nicvf_update_stats(struct nicvf *nic);
431 void nicvf_update_lmac_stats(struct nicvf *nic);