snic: driver for Cisco SCSI HBA

Cisco has developed a new PCI HBA interface called sNIC, which stands for
SCSI NIC. This is a new storage feature supported on specialized network
adapter. The new PCI function provides a uniform host interface and abstracts
backend storage.

[jejb: fix up checkpatch errors]
Signed-off-by: Narsimhulu Musini <nmusini@cisco.com>
Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>

1 files changed, 124 insertions, 0 deletions

diff --git a/drivers/scsi/snic/snic_disc.h b/drivers/scsi/snic/snic_disc.h
new file mode 100644
index 000000000000..97fa3f5c5bb4
--- /dev/null
+++ b/drivers/scsi/snic/snic_disc.h
@@ -0,0 +1,124 @@
+/*
+ * Copyright 2014 Cisco Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef __SNIC_DISC_H
+#define __SNIC_DISC_H
+
+#include "snic_fwint.h"
+
+enum snic_disc_state {
+	SNIC_DISC_NONE,
+	SNIC_DISC_INIT,
+	SNIC_DISC_PENDING,
+	SNIC_DISC_DONE
+};
+
+struct snic;
+struct snic_disc {
+	struct list_head tgt_list;
+	enum snic_disc_state state;
+	struct mutex mutex;
+	u16	disc_id;
+	u8	req_cnt;
+	u32	nxt_tgt_id;
+	u32	rtgt_cnt;
+	u8	*rtgt_info;
+	struct delayed_work disc_timeout;
+	void (*cb)(struct snic *);
+};
+
+#define SNIC_TGT_NAM_LEN	16
+
+enum snic_tgt_state {
+	SNIC_TGT_STAT_NONE,
+	SNIC_TGT_STAT_INIT,
+	SNIC_TGT_STAT_ONLINE,	/* Target is Online */
+	SNIC_TGT_STAT_OFFLINE,	/* Target is Offline */
+	SNIC_TGT_STAT_DEL,
+};
+
+struct snic_tgt_priv {
+	struct list_head list;
+	enum snic_tgt_type typ;
+	u16 disc_id;
+	char *name[SNIC_TGT_NAM_LEN];
+
+	union {
+		/*DAS Target specific info */
+		/*SAN Target specific info */
+		u8 dummmy;
+	} u;
+};
+
+/* snic tgt flags */
+#define SNIC_TGT_SCAN_PENDING	0x01
+
+struct snic_tgt {
+	struct list_head list;
+	u16	id;
+	u16	channel;
+	u32	flags;
+	u32	scsi_tgt_id;
+	enum snic_tgt_state state;
+	struct device dev;
+	struct work_struct scan_work;
+	struct work_struct del_work;
+	struct snic_tgt_priv tdata;
+};
+
+
+struct snic_fw_req;
+
+void snic_disc_init(struct snic_disc *);
+int snic_disc_start(struct snic *);
+void snic_disc_term(struct snic *);
+int snic_report_tgt_cmpl_handler(struct snic *, struct snic_fw_req *);
+int snic_tgtinfo_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq);
+void snic_process_report_tgts_rsp(struct work_struct *);
+void snic_handle_tgt_disc(struct work_struct *);
+void snic_handle_disc(struct work_struct *);
+void snic_tgt_dev_release(struct device *);
+void snic_tgt_del_all(struct snic *);
+
+#define dev_to_tgt(d) \
+	container_of(d, struct snic_tgt, dev)
+
+static inline int
+is_snic_target(struct device *dev)
+{
+	return dev->release == snic_tgt_dev_release;
+}
+
+#define starget_to_tgt(st)	\
+	(is_snic_target(((struct scsi_target *) st)->dev.parent) ? \
+		dev_to_tgt(st->dev.parent) : NULL)
+
+#define snic_tgt_to_shost(t)	\
+	dev_to_shost(t->dev.parent)
+
+static inline int
+snic_tgt_chkready(struct snic_tgt *tgt)
+{
+	if (tgt->state == SNIC_TGT_STAT_ONLINE)
+		return 0;
+	else
+		return DID_NO_CONNECT << 16;
+}
+
+const char *snic_tgt_state_to_str(int);
+int snic_tgt_scsi_abort_io(struct snic_tgt *);
+#endif /* end of  __SNIC_DISC_H */