diff options
Diffstat (limited to 'drivers/scsi/ibmvscsi/ibmvscsi.h')
| -rw-r--r-- | drivers/scsi/ibmvscsi/ibmvscsi.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.h b/drivers/scsi/ibmvscsi/ibmvscsi.h new file mode 100644 index 000000000000..1030b703c30e --- /dev/null +++ b/drivers/scsi/ibmvscsi/ibmvscsi.h | |||
| @@ -0,0 +1,109 @@ | |||
| 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 | |||
| 47 | /* ------------------------------------------------------------ | ||
| 48 | * Data Structures | ||
| 49 | */ | ||
| 50 | /* an RPA command/response transport queue */ | ||
| 51 | struct crq_queue { | ||
| 52 | struct viosrp_crq *msgs; | ||
| 53 | int size, cur; | ||
| 54 | dma_addr_t msg_token; | ||
| 55 | spinlock_t lock; | ||
| 56 | }; | ||
| 57 | |||
| 58 | /* a unit of work for the hosting partition */ | ||
| 59 | struct srp_event_struct { | ||
| 60 | union viosrp_iu *xfer_iu; | ||
| 61 | struct scsi_cmnd *cmnd; | ||
| 62 | struct list_head list; | ||
| 63 | void (*done) (struct srp_event_struct *); | ||
| 64 | struct viosrp_crq crq; | ||
| 65 | struct ibmvscsi_host_data *hostdata; | ||
| 66 | atomic_t free; | ||
| 67 | union viosrp_iu iu; | ||
| 68 | void (*cmnd_done) (struct scsi_cmnd *); | ||
| 69 | struct completion comp; | ||
| 70 | union viosrp_iu *sync_srp; | ||
| 71 | }; | ||
| 72 | |||
| 73 | /* a pool of event structs for use */ | ||
| 74 | struct event_pool { | ||
| 75 | struct srp_event_struct *events; | ||
| 76 | u32 size; | ||
| 77 | int next; | ||
| 78 | union viosrp_iu *iu_storage; | ||
| 79 | dma_addr_t iu_token; | ||
| 80 | }; | ||
| 81 | |||
| 82 | /* all driver data associated with a host adapter */ | ||
| 83 | struct ibmvscsi_host_data { | ||
| 84 | atomic_t request_limit; | ||
| 85 | struct device *dev; | ||
| 86 | struct event_pool pool; | ||
| 87 | struct crq_queue queue; | ||
| 88 | struct tasklet_struct srp_task; | ||
| 89 | struct list_head sent; | ||
| 90 | struct Scsi_Host *host; | ||
| 91 | struct mad_adapter_info_data madapter_info; | ||
| 92 | }; | ||
| 93 | |||
| 94 | /* routines for managing a command/response queue */ | ||
| 95 | int ibmvscsi_init_crq_queue(struct crq_queue *queue, | ||
| 96 | struct ibmvscsi_host_data *hostdata, | ||
| 97 | int max_requests); | ||
| 98 | void ibmvscsi_release_crq_queue(struct crq_queue *queue, | ||
| 99 | struct ibmvscsi_host_data *hostdata, | ||
| 100 | int max_requests); | ||
| 101 | void ibmvscsi_reset_crq_queue(struct crq_queue *queue, | ||
| 102 | struct ibmvscsi_host_data *hostdata); | ||
| 103 | |||
| 104 | void ibmvscsi_handle_crq(struct viosrp_crq *crq, | ||
| 105 | struct ibmvscsi_host_data *hostdata); | ||
| 106 | int ibmvscsi_send_crq(struct ibmvscsi_host_data *hostdata, | ||
| 107 | u64 word1, u64 word2); | ||
| 108 | |||
| 109 | #endif /* IBMVSCSI_H */ | ||