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-rw-r--r--drivers/scsi/ibmvscsi/ibmvscsi.h104
1 files changed, 104 insertions, 0 deletions
diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.h b/drivers/scsi/ibmvscsi/ibmvscsi.h
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+/* 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 */