From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- drivers/scsi/ibmvscsi/ibmvscsi.h | 109 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 109 insertions(+) create mode 100644 drivers/scsi/ibmvscsi/ibmvscsi.h (limited to 'drivers/scsi/ibmvscsi/ibmvscsi.h') diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.h b/drivers/scsi/ibmvscsi/ibmvscsi.h new file mode 100644 index 0000000..1030b70 --- /dev/null +++ b/drivers/scsi/ibmvscsi/ibmvscsi.h @@ -0,0 +1,109 @@ +/* ------------------------------------------------------------ + * 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 +#include +#include +#include +#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 + +/* ------------------------------------------------------------ + * 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; + union viosrp_iu *sync_srp; +}; + +/* 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; + 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 mad_adapter_info_data madapter_info; +}; + +/* routines for managing a command/response queue */ +int ibmvscsi_init_crq_queue(struct crq_queue *queue, + struct ibmvscsi_host_data *hostdata, + int max_requests); +void ibmvscsi_release_crq_queue(struct crq_queue *queue, + struct ibmvscsi_host_data *hostdata, + int max_requests); +void ibmvscsi_reset_crq_queue(struct crq_queue *queue, + struct ibmvscsi_host_data *hostdata); + +void ibmvscsi_handle_crq(struct viosrp_crq *crq, + struct ibmvscsi_host_data *hostdata); +int ibmvscsi_send_crq(struct ibmvscsi_host_data *hostdata, + u64 word1, u64 word2); + +#endif /* IBMVSCSI_H */ -- cgit v1.1