iidc_rdma.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/* Copyright (C) 2021-2025, Intel Corporation. */
 3
 4#ifndef _IIDC_RDMA_H_
 5#define _IIDC_RDMA_H_
 6
 7#include <linux/auxiliary_bus.h>
 8#include <linux/device.h>
 9#include <linux/if_ether.h>
10#include <linux/kernel.h>
11#include <linux/netdevice.h>
12#include <net/dscp.h>
13
14enum iidc_rdma_event_type {
15	IIDC_RDMA_EVENT_BEFORE_MTU_CHANGE,
16	IIDC_RDMA_EVENT_AFTER_MTU_CHANGE,
17	IIDC_RDMA_EVENT_BEFORE_TC_CHANGE,
18	IIDC_RDMA_EVENT_AFTER_TC_CHANGE,
19	IIDC_RDMA_EVENT_WARN_RESET,
20	IIDC_RDMA_EVENT_CRIT_ERR,
21	IIDC_RDMA_EVENT_NBITS		/* must be last */
22};
23
24struct iidc_rdma_event {
25	DECLARE_BITMAP(type, IIDC_RDMA_EVENT_NBITS);
26	u32 reg;
27};
28
29enum iidc_rdma_reset_type {
30	IIDC_FUNC_RESET,
31	IIDC_DEV_RESET,
32};
33
34enum iidc_rdma_protocol {
35	IIDC_RDMA_PROTOCOL_IWARP = BIT(0),
36	IIDC_RDMA_PROTOCOL_ROCEV2 = BIT(1),
37};
38
39/* Structure to be populated by core LAN PCI driver */
40struct iidc_rdma_core_dev_info {
41	struct pci_dev *pdev; /* PCI device of corresponding to main function */
42	struct auxiliary_device *adev;
43	/* Current active RDMA protocol */
44	enum iidc_rdma_protocol rdma_protocol;
45	void *iidc_priv; /* elements unique to each driver */
46};
47
48/* Structure representing auxiliary driver tailored information about the core
49 * PCI dev, each auxiliary driver using the IIDC interface will have an
50 * instance of this struct dedicated to it.
51 */
52struct iidc_rdma_core_auxiliary_dev {
53	struct auxiliary_device adev;
54	struct iidc_rdma_core_dev_info *cdev_info;
55};
56
57/* structure representing the auxiliary driver. This struct is to be
58 * allocated and populated by the auxiliary driver's owner. The core PCI
59 * driver will access these ops by performing a container_of on the
60 * auxiliary_device->dev.driver.
61 */
62struct iidc_rdma_core_auxiliary_drv {
63	struct auxiliary_driver adrv;
64	void (*event_handler)(struct iidc_rdma_core_dev_info *cdev,
65			      struct iidc_rdma_event *event);
66};
67
68#endif /* _IIDC_RDMA_H_*/