| /* ------------------------------------------------------------ |
| * ibmvscsi.h |
| * (C) Copyright IBM Corporation 1994, 2003 |
| * Authors: Colin DeVilbiss (devilbis@us.ibm.com) |
| * Santiago Leon (santil@us.ibm.com) |
| * Dave Boutcher (sleddog@us.ibm.com) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| * USA |
| * |
| * ------------------------------------------------------------ |
| * Emulation of a SCSI host adapter for Virtual I/O devices |
| * |
| * This driver allows the Linux SCSI peripheral drivers to directly |
| * access devices in the hosting partition, either on an iSeries |
| * hypervisor system or a converged hypervisor system. |
| */ |
| #ifndef IBMVSCSI_H |
| #define IBMVSCSI_H |
| #include <linux/types.h> |
| #include <linux/list.h> |
| #include <linux/completion.h> |
| #include <linux/interrupt.h> |
| #include "viosrp.h" |
| |
| struct scsi_cmnd; |
| struct Scsi_Host; |
| |
| /* Number of indirect bufs...the list of these has to fit in the |
| * additional data of the srp_cmd struct along with the indirect |
| * descriptor |
| */ |
| #define MAX_INDIRECT_BUFS 10 |
| |
| #define IBMVSCSI_MAX_REQUESTS_DEFAULT 100 |
| #define IBMVSCSI_CMDS_PER_LUN_DEFAULT 16 |
| #define IBMVSCSI_MAX_SECTORS_DEFAULT 256 /* 32 * 8 = default max I/O 32 pages */ |
| #define IBMVSCSI_MAX_CMDS_PER_LUN 64 |
| |
| /* ------------------------------------------------------------ |
| * Data Structures |
| */ |
| /* an RPA command/response transport queue */ |
| struct crq_queue { |
| struct viosrp_crq *msgs; |
| int size, cur; |
| dma_addr_t msg_token; |
| spinlock_t lock; |
| }; |
| |
| /* a unit of work for the hosting partition */ |
| struct srp_event_struct { |
| union viosrp_iu *xfer_iu; |
| struct scsi_cmnd *cmnd; |
| struct list_head list; |
| void (*done) (struct srp_event_struct *); |
| struct viosrp_crq crq; |
| struct ibmvscsi_host_data *hostdata; |
| atomic_t free; |
| union viosrp_iu iu; |
| void (*cmnd_done) (struct scsi_cmnd *); |
| struct completion comp; |
| struct timer_list timer; |
| union viosrp_iu *sync_srp; |
| struct srp_direct_buf *ext_list; |
| dma_addr_t ext_list_token; |
| }; |
| |
| /* a pool of event structs for use */ |
| struct event_pool { |
| struct srp_event_struct *events; |
| u32 size; |
| int next; |
| union viosrp_iu *iu_storage; |
| dma_addr_t iu_token; |
| }; |
| |
| /* all driver data associated with a host adapter */ |
| struct ibmvscsi_host_data { |
| atomic_t request_limit; |
| int client_migrated; |
| int reset_crq; |
| int reenable_crq; |
| struct device *dev; |
| struct event_pool pool; |
| struct crq_queue queue; |
| struct tasklet_struct srp_task; |
| struct list_head sent; |
| struct Scsi_Host *host; |
| struct task_struct *work_thread; |
| wait_queue_head_t work_wait_q; |
| struct mad_adapter_info_data madapter_info; |
| struct capabilities caps; |
| dma_addr_t caps_addr; |
| dma_addr_t adapter_info_addr; |
| }; |
| |
| #endif /* IBMVSCSI_H */ |
