diff options
Diffstat (limited to 'drivers/scsi/cxgb3i/cxgb3i.h')
| -rw-r--r-- | drivers/scsi/cxgb3i/cxgb3i.h | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/drivers/scsi/cxgb3i/cxgb3i.h b/drivers/scsi/cxgb3i/cxgb3i.h new file mode 100644 index 000000000000..fde6e4c634e7 --- /dev/null +++ b/drivers/scsi/cxgb3i/cxgb3i.h @@ -0,0 +1,139 @@ +/* + * cxgb3i.h: Chelsio S3xx iSCSI driver. + * + * Copyright (c) 2008 Chelsio Communications, Inc. + * + * 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. + * + * Written by: Karen Xie (kxie@chelsio.com) + */ + +#ifndef __CXGB3I_H__ +#define __CXGB3I_H__ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/errno.h> +#include <linux/types.h> +#include <linux/list.h> +#include <linux/netdevice.h> +#include <linux/scatterlist.h> +#include <scsi/libiscsi_tcp.h> + +/* from cxgb3 LLD */ +#include "common.h" +#include "t3_cpl.h" +#include "t3cdev.h" +#include "cxgb3_ctl_defs.h" +#include "cxgb3_offload.h" +#include "firmware_exports.h" + +#include "cxgb3i_offload.h" +#include "cxgb3i_ddp.h" + +#define CXGB3I_SCSI_QDEPTH_DFLT 128 +#define CXGB3I_MAX_TARGET CXGB3I_MAX_CONN +#define CXGB3I_MAX_LUN 512 +#define ISCSI_PDU_NONPAYLOAD_MAX \ + (sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE + 2*ISCSI_DIGEST_SIZE) + +struct cxgb3i_adapter; +struct cxgb3i_hba; +struct cxgb3i_endpoint; + +/** + * struct cxgb3i_hba - cxgb3i iscsi structure (per port) + * + * @snic: cxgb3i adapter containing this port + * @ndev: pointer to netdev structure + * @shost: pointer to scsi host structure + */ +struct cxgb3i_hba { + struct cxgb3i_adapter *snic; + struct net_device *ndev; + struct Scsi_Host *shost; +}; + +/** + * struct cxgb3i_adapter - cxgb3i adapter structure (per pci) + * + * @listhead: list head to link elements + * @lock: lock for this structure + * @tdev: pointer to t3cdev used by cxgb3 driver + * @pdev: pointer to pci dev + * @hba_cnt: # of hbas (the same as # of ports) + * @hba: all the hbas on this adapter + * @tx_max_size: max. tx packet size supported + * @rx_max_size: max. rx packet size supported + * @tag_format: ddp tag format settings + */ +struct cxgb3i_adapter { + struct list_head list_head; + spinlock_t lock; + struct t3cdev *tdev; + struct pci_dev *pdev; + unsigned char hba_cnt; + struct cxgb3i_hba *hba[MAX_NPORTS]; + + unsigned int tx_max_size; + unsigned int rx_max_size; + + struct cxgb3i_tag_format tag_format; +}; + +/** + * struct cxgb3i_conn - cxgb3i iscsi connection + * + * @listhead: list head to link elements + * @cep: pointer to iscsi_endpoint structure + * @conn: pointer to iscsi_conn structure + * @hba: pointer to the hba this conn. is going through + * @task_idx_bits: # of bits needed for session->cmds_max + */ +struct cxgb3i_conn { + struct list_head list_head; + struct cxgb3i_endpoint *cep; + struct iscsi_conn *conn; + struct cxgb3i_hba *hba; + unsigned int task_idx_bits; +}; + +/** + * struct cxgb3i_endpoint - iscsi tcp endpoint + * + * @c3cn: the h/w tcp connection representation + * @hba: pointer to the hba this conn. is going through + * @cconn: pointer to the associated cxgb3i iscsi connection + */ +struct cxgb3i_endpoint { + struct s3_conn *c3cn; + struct cxgb3i_hba *hba; + struct cxgb3i_conn *cconn; +}; + +int cxgb3i_iscsi_init(void); +void cxgb3i_iscsi_cleanup(void); + +struct cxgb3i_adapter *cxgb3i_adapter_add(struct t3cdev *); +void cxgb3i_adapter_remove(struct t3cdev *); +int cxgb3i_adapter_ulp_init(struct cxgb3i_adapter *); +void cxgb3i_adapter_ulp_cleanup(struct cxgb3i_adapter *); + +struct cxgb3i_hba *cxgb3i_hba_find_by_netdev(struct net_device *); +struct cxgb3i_hba *cxgb3i_hba_host_add(struct cxgb3i_adapter *, + struct net_device *); +void cxgb3i_hba_host_remove(struct cxgb3i_hba *); + +int cxgb3i_pdu_init(void); +void cxgb3i_pdu_cleanup(void); +void cxgb3i_conn_cleanup_task(struct iscsi_task *); +int cxgb3i_conn_alloc_pdu(struct iscsi_task *, u8); +int cxgb3i_conn_init_pdu(struct iscsi_task *, unsigned int, unsigned int); +int cxgb3i_conn_xmit_pdu(struct iscsi_task *); + +void cxgb3i_release_itt(struct iscsi_task *task, itt_t hdr_itt); +int cxgb3i_reserve_itt(struct iscsi_task *task, itt_t *hdr_itt); + +#endif |