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1da177e4 LT |
1 | /* ------------------------------------------------------------ |
2 | * ibmvscsi.h | |
3 | * (C) Copyright IBM Corporation 1994, 2003 | |
4 | * Authors: Colin DeVilbiss (devilbis@us.ibm.com) | |
5 | * Santiago Leon (santil@us.ibm.com) | |
6 | * Dave Boutcher (sleddog@us.ibm.com) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
21 | * USA | |
22 | * | |
23 | * ------------------------------------------------------------ | |
24 | * Emulation of a SCSI host adapter for Virtual I/O devices | |
25 | * | |
26 | * This driver allows the Linux SCSI peripheral drivers to directly | |
27 | * access devices in the hosting partition, either on an iSeries | |
28 | * hypervisor system or a converged hypervisor system. | |
29 | */ | |
30 | #ifndef IBMVSCSI_H | |
31 | #define IBMVSCSI_H | |
32 | #include <linux/types.h> | |
33 | #include <linux/list.h> | |
34 | #include <linux/completion.h> | |
35 | #include <linux/interrupt.h> | |
36 | #include "viosrp.h" | |
37 | ||
38 | struct scsi_cmnd; | |
39 | struct Scsi_Host; | |
40 | ||
41 | /* Number of indirect bufs...the list of these has to fit in the | |
42 | * additional data of the srp_cmd struct along with the indirect | |
43 | * descriptor | |
44 | */ | |
45 | #define MAX_INDIRECT_BUFS 10 | |
46 | ||
a897ff2a | 47 | #define IBMVSCSI_MAX_REQUESTS_DEFAULT 100 |
7912a0ac RJ |
48 | #define IBMVSCSI_CMDS_PER_LUN_DEFAULT 16 |
49 | #define IBMVSCSI_MAX_SECTORS_DEFAULT 256 /* 32 * 8 = default max I/O 32 pages */ | |
742d25b8 | 50 | #define IBMVSCSI_MAX_CMDS_PER_LUN 64 |
a897ff2a | 51 | |
1da177e4 LT |
52 | /* ------------------------------------------------------------ |
53 | * Data Structures | |
54 | */ | |
55 | /* an RPA command/response transport queue */ | |
56 | struct crq_queue { | |
57 | struct viosrp_crq *msgs; | |
58 | int size, cur; | |
59 | dma_addr_t msg_token; | |
60 | spinlock_t lock; | |
61 | }; | |
62 | ||
63 | /* a unit of work for the hosting partition */ | |
64 | struct srp_event_struct { | |
65 | union viosrp_iu *xfer_iu; | |
66 | struct scsi_cmnd *cmnd; | |
67 | struct list_head list; | |
68 | void (*done) (struct srp_event_struct *); | |
69 | struct viosrp_crq crq; | |
70 | struct ibmvscsi_host_data *hostdata; | |
71 | atomic_t free; | |
72 | union viosrp_iu iu; | |
73 | void (*cmnd_done) (struct scsi_cmnd *); | |
74 | struct completion comp; | |
3d0e91f7 | 75 | struct timer_list timer; |
1da177e4 | 76 | union viosrp_iu *sync_srp; |
ef265673 | 77 | struct srp_direct_buf *ext_list; |
4dddbc26 | 78 | dma_addr_t ext_list_token; |
1da177e4 LT |
79 | }; |
80 | ||
81 | /* a pool of event structs for use */ | |
82 | struct event_pool { | |
83 | struct srp_event_struct *events; | |
84 | u32 size; | |
85 | int next; | |
86 | union viosrp_iu *iu_storage; | |
87 | dma_addr_t iu_token; | |
88 | }; | |
89 | ||
90 | /* all driver data associated with a host adapter */ | |
91 | struct ibmvscsi_host_data { | |
92 | atomic_t request_limit; | |
126c5cc3 | 93 | int client_migrated; |
0f33ece5 BK |
94 | int reset_crq; |
95 | int reenable_crq; | |
1da177e4 LT |
96 | struct device *dev; |
97 | struct event_pool pool; | |
98 | struct crq_queue queue; | |
99 | struct tasklet_struct srp_task; | |
100 | struct list_head sent; | |
101 | struct Scsi_Host *host; | |
0f33ece5 BK |
102 | struct task_struct *work_thread; |
103 | wait_queue_head_t work_wait_q; | |
1da177e4 | 104 | struct mad_adapter_info_data madapter_info; |
126c5cc3 BK |
105 | struct capabilities caps; |
106 | dma_addr_t caps_addr; | |
107 | dma_addr_t adapter_info_addr; | |
1da177e4 LT |
108 | }; |
109 | ||
1da177e4 | 110 | #endif /* IBMVSCSI_H */ |