kvaser_pciefd.h

 1/* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */
 2/* kvaser_pciefd common definitions and declarations
 3 *
 4 * Copyright (C) 2025 KVASER AB, Sweden. All rights reserved.
 5 */
 6
 7#ifndef _KVASER_PCIEFD_H
 8#define _KVASER_PCIEFD_H
 9
10#include <linux/can/dev.h>
11#include <linux/completion.h>
12#include <linux/pci.h>
13#include <linux/spinlock.h>
14#include <linux/timer.h>
15#include <linux/types.h>
16#include <net/devlink.h>
17
18#define KVASER_PCIEFD_MAX_CAN_CHANNELS 8UL
19#define KVASER_PCIEFD_DMA_COUNT 2U
20#define KVASER_PCIEFD_DMA_SIZE (4U * 1024U)
21#define KVASER_PCIEFD_CAN_TX_MAX_COUNT 17U
22
23struct kvaser_pciefd;
24
25struct kvaser_pciefd_address_offset {
26	u32 serdes;
27	u32 pci_ien;
28	u32 pci_irq;
29	u32 sysid;
30	u32 loopback;
31	u32 kcan_srb_fifo;
32	u32 kcan_srb;
33	u32 kcan_ch0;
34	u32 kcan_ch1;
35};
36
37struct kvaser_pciefd_irq_mask {
38	u32 kcan_rx0;
39	u32 kcan_tx[KVASER_PCIEFD_MAX_CAN_CHANNELS];
40	u32 all;
41};
42
43struct kvaser_pciefd_dev_ops {
44	void (*kvaser_pciefd_write_dma_map)(struct kvaser_pciefd *pcie,
45					    dma_addr_t addr, int index);
46};
47
48struct kvaser_pciefd_driver_data {
49	const struct kvaser_pciefd_address_offset *address_offset;
50	const struct kvaser_pciefd_irq_mask *irq_mask;
51	const struct kvaser_pciefd_dev_ops *ops;
52};
53
54struct kvaser_pciefd_fw_version {
55	u8 major;
56	u8 minor;
57	u16 build;
58};
59
60struct kvaser_pciefd_can {
61	struct can_priv can;
62	struct devlink_port devlink_port;
63	struct kvaser_pciefd *kv_pcie;
64	void __iomem *reg_base;
65	struct can_berr_counter bec;
66	u32 ioc;
67	u8 cmd_seq;
68	u8 tx_max_count;
69	u8 tx_idx;
70	u8 ack_idx;
71	int err_rep_cnt;
72	unsigned int completed_tx_pkts;
73	unsigned int completed_tx_bytes;
74	spinlock_t lock; /* Locks sensitive registers (e.g. MODE) */
75	struct timer_list bec_poll_timer;
76	struct completion start_comp, flush_comp;
77};
78
79struct kvaser_pciefd {
80	struct pci_dev *pci;
81	void __iomem *reg_base;
82	struct kvaser_pciefd_can *can[KVASER_PCIEFD_MAX_CAN_CHANNELS];
83	const struct kvaser_pciefd_driver_data *driver_data;
84	void *dma_data[KVASER_PCIEFD_DMA_COUNT];
85	u8 nr_channels;
86	u32 bus_freq;
87	u32 freq;
88	u32 freq_to_ticks_div;
89	struct kvaser_pciefd_fw_version fw_version;
90};
91
92extern const struct devlink_ops kvaser_pciefd_devlink_ops;
93
94int kvaser_pciefd_devlink_port_register(struct kvaser_pciefd_can *can);
95void kvaser_pciefd_devlink_port_unregister(struct kvaser_pciefd_can *can);
96#endif /* _KVASER_PCIEFD_H */