xref: /openbmc/linux/drivers/scsi/fnic/fnic_io.h (revision 514f0c40)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
4  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
5  */
6 #ifndef _FNIC_IO_H_
7 #define _FNIC_IO_H_
8 
9 #include <scsi/fc/fc_fcp.h>
10 
11 #define FNIC_DFLT_SG_DESC_CNT  32
12 #define FNIC_MAX_SG_DESC_CNT        256     /* Maximum descriptors per sgl */
13 #define FNIC_SG_DESC_ALIGN          16      /* Descriptor address alignment */
14 
15 struct host_sg_desc {
16 	__le64 addr;
17 	__le32 len;
18 	u32 _resvd;
19 };
20 
21 struct fnic_dflt_sgl_list {
22 	struct host_sg_desc sg_desc[FNIC_DFLT_SG_DESC_CNT];
23 };
24 
25 struct fnic_sgl_list {
26 	struct host_sg_desc sg_desc[FNIC_MAX_SG_DESC_CNT];
27 };
28 
29 enum fnic_sgl_list_type {
30 	FNIC_SGL_CACHE_DFLT = 0,  /* cache with default size sgl */
31 	FNIC_SGL_CACHE_MAX,       /* cache with max size sgl */
32 	FNIC_SGL_NUM_CACHES       /* number of sgl caches */
33 };
34 
35 enum fnic_ioreq_state {
36 	FNIC_IOREQ_NOT_INITED = 0,
37 	FNIC_IOREQ_CMD_PENDING,
38 	FNIC_IOREQ_ABTS_PENDING,
39 	FNIC_IOREQ_ABTS_COMPLETE,
40 	FNIC_IOREQ_CMD_COMPLETE,
41 };
42 
43 struct fnic_io_req {
44 	struct host_sg_desc *sgl_list; /* sgl list */
45 	void *sgl_list_alloc; /* sgl list address used for free */
46 	dma_addr_t sense_buf_pa; /* dma address for sense buffer*/
47 	dma_addr_t sgl_list_pa;	/* dma address for sgl list */
48 	u16 sgl_cnt;
49 	u8 sgl_type; /* device DMA descriptor list type */
50 	u8 io_completed:1; /* set to 1 when fw completes IO */
51 	u32 port_id; /* remote port DID */
52 	unsigned long start_time; /* in jiffies */
53 	struct completion *abts_done; /* completion for abts */
54 	struct completion *dr_done; /* completion for device reset */
55 	unsigned int tag;
56 	struct scsi_cmnd *sc; /* midlayer's cmd pointer */
57 };
58 
59 enum fnic_port_speeds {
60 	DCEM_PORTSPEED_NONE = 0,
61 	DCEM_PORTSPEED_1G    = 1000,
62 	DCEM_PORTSPEED_10G   = 10000,
63 	DCEM_PORTSPEED_20G   = 20000,
64 	DCEM_PORTSPEED_25G   = 25000,
65 	DCEM_PORTSPEED_40G   = 40000,
66 	DCEM_PORTSPEED_4x10G = 41000,
67 	DCEM_PORTSPEED_100G  = 100000,
68 };
69 #endif /* _FNIC_IO_H_ */
70