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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 | /* SPDX-License-Identifier: GPL-2.0-or-later */ /* ------------------------------------------------------------ * 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) * * ------------------------------------------------------------ * 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 <scsi/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 #define IBMVSCSI_MAX_LUN 32 /* ------------------------------------------------------------ * 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; }; enum ibmvscsi_host_action { IBMVSCSI_HOST_ACTION_NONE = 0, IBMVSCSI_HOST_ACTION_RESET, IBMVSCSI_HOST_ACTION_REENABLE, IBMVSCSI_HOST_ACTION_UNBLOCK, }; /* all driver data associated with a host adapter */ struct ibmvscsi_host_data { struct list_head host_list; atomic_t request_limit; int client_migrated; enum ibmvscsi_host_action action; 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 */ |