Merge tag 'nfs-for-4.20-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
[sfrench/cifs-2.6.git] / drivers / net / ethernet / intel / ice / ice_controlq.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (c) 2018, Intel Corporation. */
3
4 #ifndef _ICE_CONTROLQ_H_
5 #define _ICE_CONTROLQ_H_
6
7 #include "ice_adminq_cmd.h"
8
9 /* Maximum buffer lengths for all control queue types */
10 #define ICE_AQ_MAX_BUF_LEN 4096
11 #define ICE_MBXQ_MAX_BUF_LEN 4096
12
13 #define ICE_CTL_Q_DESC(R, i) \
14         (&(((struct ice_aq_desc *)((R).desc_buf.va))[i]))
15
16 #define ICE_CTL_Q_DESC_UNUSED(R) \
17         (u16)((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
18               (R)->next_to_clean - (R)->next_to_use - 1)
19
20 /* Defines that help manage the driver vs FW API checks.
21  * Take a look at ice_aq_ver_check in ice_controlq.c for actual usage.
22  *
23  */
24 #define EXP_FW_API_VER_BRANCH           0x00
25 #define EXP_FW_API_VER_MAJOR            0x00
26 #define EXP_FW_API_VER_MINOR            0x01
27
28 /* Different control queue types: These are mainly for SW consumption. */
29 enum ice_ctl_q {
30         ICE_CTL_Q_UNKNOWN = 0,
31         ICE_CTL_Q_ADMIN,
32         ICE_CTL_Q_MAILBOX,
33 };
34
35 /* Control Queue default settings */
36 #define ICE_CTL_Q_SQ_CMD_TIMEOUT        250  /* msecs */
37
38 struct ice_ctl_q_ring {
39         void *dma_head;                 /* Virtual address to dma head */
40         struct ice_dma_mem desc_buf;    /* descriptor ring memory */
41         void *cmd_buf;                  /* command buffer memory */
42
43         union {
44                 struct ice_dma_mem *sq_bi;
45                 struct ice_dma_mem *rq_bi;
46         } r;
47
48         u16 count;              /* Number of descriptors */
49
50         /* used for interrupt processing */
51         u16 next_to_use;
52         u16 next_to_clean;
53
54         /* used for queue tracking */
55         u32 head;
56         u32 tail;
57         u32 len;
58         u32 bah;
59         u32 bal;
60         u32 len_mask;
61         u32 len_ena_mask;
62         u32 head_mask;
63 };
64
65 /* sq transaction details */
66 struct ice_sq_cd {
67         struct ice_aq_desc *wb_desc;
68 };
69
70 #define ICE_CTL_Q_DETAILS(R, i) (&(((struct ice_sq_cd *)((R).cmd_buf))[i]))
71
72 /* rq event information */
73 struct ice_rq_event_info {
74         struct ice_aq_desc desc;
75         u16 msg_len;
76         u16 buf_len;
77         u8 *msg_buf;
78 };
79
80 /* Control Queue information */
81 struct ice_ctl_q_info {
82         enum ice_ctl_q qtype;
83         struct ice_ctl_q_ring rq;       /* receive queue */
84         struct ice_ctl_q_ring sq;       /* send queue */
85         u32 sq_cmd_timeout;             /* send queue cmd write back timeout */
86         u16 num_rq_entries;             /* receive queue depth */
87         u16 num_sq_entries;             /* send queue depth */
88         u16 rq_buf_size;                /* receive queue buffer size */
89         u16 sq_buf_size;                /* send queue buffer size */
90         struct mutex sq_lock;           /* Send queue lock */
91         struct mutex rq_lock;           /* Receive queue lock */
92         enum ice_aq_err sq_last_status; /* last status on send queue */
93         enum ice_aq_err rq_last_status; /* last status on receive queue */
94 };
95
96 #endif /* _ICE_CONTROLQ_H_ */