cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ibmvscsi.h (2862B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/* ------------------------------------------------------------
      3 * ibmvscsi.h
      4 * (C) Copyright IBM Corporation 1994, 2003
      5 * Authors: Colin DeVilbiss (devilbis@us.ibm.com)
      6 *          Santiago Leon (santil@us.ibm.com)
      7 *          Dave Boutcher (sleddog@us.ibm.com)
      8 *
      9 * ------------------------------------------------------------
     10 * Emulation of a SCSI host adapter for Virtual I/O devices
     11 *
     12 * This driver allows the Linux SCSI peripheral drivers to directly
     13 * access devices in the hosting partition, either on an iSeries
     14 * hypervisor system or a converged hypervisor system.
     15 */
     16#ifndef IBMVSCSI_H
     17#define IBMVSCSI_H
     18#include <linux/types.h>
     19#include <linux/list.h>
     20#include <linux/completion.h>
     21#include <linux/interrupt.h>
     22#include <scsi/viosrp.h>
     23
     24struct scsi_cmnd;
     25struct Scsi_Host;
     26
     27/* Number of indirect bufs...the list of these has to fit in the
     28 * additional data of the srp_cmd struct along with the indirect
     29 * descriptor
     30 */
     31#define MAX_INDIRECT_BUFS 10
     32
     33#define IBMVSCSI_MAX_REQUESTS_DEFAULT 100
     34#define IBMVSCSI_CMDS_PER_LUN_DEFAULT 16
     35#define IBMVSCSI_MAX_SECTORS_DEFAULT 256 /* 32 * 8 = default max I/O 32 pages */
     36#define IBMVSCSI_MAX_CMDS_PER_LUN 64
     37#define IBMVSCSI_MAX_LUN 32
     38
     39/* ------------------------------------------------------------
     40 * Data Structures
     41 */
     42/* an RPA command/response transport queue */
     43struct crq_queue {
     44	struct viosrp_crq *msgs;
     45	int size, cur;
     46	dma_addr_t msg_token;
     47	spinlock_t lock;
     48};
     49
     50/* a unit of work for the hosting partition */
     51struct srp_event_struct {
     52	union viosrp_iu *xfer_iu;
     53	struct scsi_cmnd *cmnd;
     54	struct list_head list;
     55	void (*done) (struct srp_event_struct *);
     56	struct viosrp_crq crq;
     57	struct ibmvscsi_host_data *hostdata;
     58	atomic_t free;
     59	union viosrp_iu iu;
     60	void (*cmnd_done) (struct scsi_cmnd *);
     61	struct completion comp;
     62	struct timer_list timer;
     63	union viosrp_iu *sync_srp;
     64	struct srp_direct_buf *ext_list;
     65	dma_addr_t ext_list_token;
     66};
     67
     68/* a pool of event structs for use */
     69struct event_pool {
     70	struct srp_event_struct *events;
     71	u32 size;
     72	int next;
     73	union viosrp_iu *iu_storage;
     74	dma_addr_t iu_token;
     75};
     76
     77enum ibmvscsi_host_action {
     78	IBMVSCSI_HOST_ACTION_NONE = 0,
     79	IBMVSCSI_HOST_ACTION_RESET,
     80	IBMVSCSI_HOST_ACTION_REENABLE,
     81	IBMVSCSI_HOST_ACTION_UNBLOCK,
     82};
     83
     84/* all driver data associated with a host adapter */
     85struct ibmvscsi_host_data {
     86	struct list_head host_list;
     87	atomic_t request_limit;
     88	int client_migrated;
     89	enum ibmvscsi_host_action action;
     90	struct device *dev;
     91	struct event_pool pool;
     92	struct crq_queue queue;
     93	struct tasklet_struct srp_task;
     94	struct list_head sent;
     95	struct Scsi_Host *host;
     96	struct task_struct *work_thread;
     97	wait_queue_head_t work_wait_q;
     98	struct mad_adapter_info_data madapter_info;
     99	struct capabilities caps;
    100	dma_addr_t caps_addr;
    101	dma_addr_t adapter_info_addr;
    102};
    103
    104#endif				/* IBMVSCSI_H */