drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h - arm/linux - Git at Google

 /*
  * This file is part of the Chelsio T4 Ethernet driver for Linux.
  *
  * Copyright (c) 2003-2010 Chelsio Communications, Inc. All rights reserved.
  *
  * This software is available to you under a choice of one of two
  * licenses.  You may choose to be licensed under the terms of the GNU
  * General Public License (GPL) Version 2, available from the file
  * COPYING in the main directory of this source tree, or the
  * OpenIB.org BSD license below:
  *
  *     Redistribution and use in source and binary forms, with or
  *     without modification, are permitted provided that the following
  *     conditions are met:
  *
  *      - Redistributions of source code must retain the above
  *        copyright notice, this list of conditions and the following
  *        disclaimer.
  *
  *      - Redistributions in binary form must reproduce the above
  *        copyright notice, this list of conditions and the following
  *        disclaimer in the documentation and/or other materials
  *        provided with the distribution.
  *
  * 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 __CXGB4_OFLD_H
 #define __CXGB4_OFLD_H

 #include <linux/cache.h>
 #include <linux/spinlock.h>
 #include <linux/skbuff.h>
 #include <linux/atomic.h>

 /* CPL message priority levels */
 enum {
 	CPL_PRIORITY_DATA     = 0,  /* data messages */
 	CPL_PRIORITY_SETUP    = 1,  /* connection setup messages */
 	CPL_PRIORITY_TEARDOWN = 0,  /* connection teardown messages */
 	CPL_PRIORITY_LISTEN   = 1,  /* listen start/stop messages */
 	CPL_PRIORITY_ACK      = 1,  /* RX ACK messages */
 	CPL_PRIORITY_CONTROL  = 1   /* control messages */
 };

 #define INIT_TP_WR(w, tid) do { \
 	(w)->wr.wr_hi = htonl(FW_WR_OP(FW_TP_WR) | \
 			      FW_WR_IMMDLEN(sizeof(*w) - sizeof(w->wr))); \
 	(w)->wr.wr_mid = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*w), 16)) | \
 			       FW_WR_FLOWID(tid)); \
 	(w)->wr.wr_lo = cpu_to_be64(0); \
 } while (0)

 #define INIT_TP_WR_CPL(w, cpl, tid) do { \
 	INIT_TP_WR(w, tid); \
 	OPCODE_TID(w) = htonl(MK_OPCODE_TID(cpl, tid)); \
 } while (0)

 #define INIT_ULPTX_WR(w, wrlen, atomic, tid) do { \
 	(w)->wr.wr_hi = htonl(FW_WR_OP(FW_ULPTX_WR) | FW_WR_ATOMIC(atomic)); \
 	(w)->wr.wr_mid = htonl(FW_WR_LEN16(DIV_ROUND_UP(wrlen, 16)) | \
 			       FW_WR_FLOWID(tid)); \
 	(w)->wr.wr_lo = cpu_to_be64(0); \
 } while (0)

 /* Special asynchronous notification message */
 #define CXGB4_MSG_AN ((void *)1)

 struct serv_entry {
 	void *data;
 };

 union aopen_entry {
 	void *data;
 	union aopen_entry *next;
 };

 /*
  * Holds the size, base address, free list start, etc of the TID, server TID,
  * and active-open TID tables.  The tables themselves are allocated dynamically.
  */
 struct tid_info {
 	void **tid_tab;
 	unsigned int ntids;

 	struct serv_entry *stid_tab;
 	unsigned long *stid_bmap;
 	unsigned int nstids;
 	unsigned int stid_base;

 	union aopen_entry *atid_tab;
 	unsigned int natids;

 	unsigned int nftids;
 	unsigned int ftid_base;

 	spinlock_t atid_lock ____cacheline_aligned_in_smp;
 	union aopen_entry *afree;
 	unsigned int atids_in_use;

 	spinlock_t stid_lock;
 	unsigned int stids_in_use;

 	atomic_t tids_in_use;
 };

 static inline void *lookup_tid(const struct tid_info *t, unsigned int tid)
 {
 	return tid < t->ntids ? t->tid_tab[tid] : NULL;
 }

 static inline void *lookup_atid(const struct tid_info *t, unsigned int atid)
 {
 	return atid < t->natids ? t->atid_tab[atid].data : NULL;
 }

 static inline void *lookup_stid(const struct tid_info *t, unsigned int stid)
 {
 	stid -= t->stid_base;
 	return stid < t->nstids ? t->stid_tab[stid].data : NULL;
 }

 static inline void cxgb4_insert_tid(struct tid_info *t, void *data,
 				    unsigned int tid)
 {
 	t->tid_tab[tid] = data;
 	atomic_inc(&t->tids_in_use);
 }

 int cxgb4_alloc_atid(struct tid_info *t, void *data);
 int cxgb4_alloc_stid(struct tid_info *t, int family, void *data);
 void cxgb4_free_atid(struct tid_info *t, unsigned int atid);
 void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family);
 void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid);

 struct in6_addr;

 int cxgb4_create_server(const struct net_device *dev, unsigned int stid,
 			__be32 sip, __be16 sport, unsigned int queue);

 static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue)
 {
 	skb_set_queue_mapping(skb, (queue << 1) | prio);
 }

 enum cxgb4_uld {
 	CXGB4_ULD_RDMA,
 	CXGB4_ULD_ISCSI,
 	CXGB4_ULD_MAX
 };

 enum cxgb4_state {
 	CXGB4_STATE_UP,
 	CXGB4_STATE_START_RECOVERY,
 	CXGB4_STATE_DOWN,
 	CXGB4_STATE_DETACH
 };

 enum cxgb4_control {
 	CXGB4_CONTROL_DB_FULL,
 	CXGB4_CONTROL_DB_EMPTY,
 	CXGB4_CONTROL_DB_DROP,
 };

 struct pci_dev;
 struct l2t_data;
 struct net_device;
 struct pkt_gl;
 struct tp_tcp_stats;

 struct cxgb4_range {
 	unsigned int start;
 	unsigned int size;
 };

 struct cxgb4_virt_res {                      /* virtualized HW resources */
 	struct cxgb4_range ddp;
 	struct cxgb4_range iscsi;
 	struct cxgb4_range stag;
 	struct cxgb4_range rq;
 	struct cxgb4_range pbl;
 	struct cxgb4_range qp;
 	struct cxgb4_range cq;
 	struct cxgb4_range ocq;
 };

 #define OCQ_WIN_OFFSET(pdev, vres) \
 	(pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size))

 /*
  * Block of information the LLD provides to ULDs attaching to a device.
  */
 struct cxgb4_lld_info {
 	struct pci_dev *pdev;                /* associated PCI device */
 	struct l2t_data *l2t;                /* L2 table */
 	struct tid_info *tids;               /* TID table */
 	struct net_device **ports;           /* device ports */
 	const struct cxgb4_virt_res *vr;     /* assorted HW resources */
 	const unsigned short *mtus;          /* MTU table */
 	const unsigned short *rxq_ids;       /* the ULD's Rx queue ids */
 	unsigned short nrxq;                 /* # of Rx queues */
 	unsigned short ntxq;                 /* # of Tx queues */
 	unsigned char nchan:4;               /* # of channels */
 	unsigned char nports:4;              /* # of ports */
 	unsigned char wr_cred;               /* WR 16-byte credits */
 	unsigned char adapter_type;          /* type of adapter */
 	unsigned char fw_api_ver;            /* FW API version */
 	unsigned int fw_vers;                /* FW version */
 	unsigned int iscsi_iolen;            /* iSCSI max I/O length */
 	unsigned short udb_density;          /* # of user DB/page */
 	unsigned short ucq_density;          /* # of user CQs/page */
 	void __iomem *gts_reg;               /* address of GTS register */
 	void __iomem *db_reg;                /* address of kernel doorbell */
 	int dbfifo_int_thresh;		     /* doorbell fifo int threshold */
 };

 struct cxgb4_uld_info {
 	const char *name;
 	void *(*add)(const struct cxgb4_lld_info *p);
 	int (*rx_handler)(void *handle, const __be64 *rsp,
 			  const struct pkt_gl *gl);
 	int (*state_change)(void *handle, enum cxgb4_state new_state);
 	int (*control)(void *handle, enum cxgb4_control control, ...);
 };

 int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p);
 int cxgb4_unregister_uld(enum cxgb4_uld type);
 int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb);
 unsigned int cxgb4_dbfifo_count(const struct net_device *dev, int lpfifo);
 unsigned int cxgb4_port_chan(const struct net_device *dev);
 unsigned int cxgb4_port_viid(const struct net_device *dev);
 unsigned int cxgb4_port_idx(const struct net_device *dev);
 unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu,
 			    unsigned int *idx);
 void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4,
 			 struct tp_tcp_stats *v6);
 void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask,
 		      const unsigned int *pgsz_order);
 struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl,
 				   unsigned int skb_len, unsigned int pull_len);
 int cxgb4_sync_txq_pidx(struct net_device *dev, u16 qid, u16 pidx, u16 size);
 int cxgb4_flush_eq_cache(struct net_device *dev);
 #endif  /* !__CXGB4_OFLD_H */
	/*
	* This file is part of the Chelsio T4 Ethernet driver for Linux.
	*
	* Copyright (c) 2003-2010 Chelsio Communications, Inc. All rights reserved.
	*
	* This software is available to you under a choice of one of two
	* licenses. You may choose to be licensed under the terms of the GNU
	* General Public License (GPL) Version 2, available from the file
	* COPYING in the main directory of this source tree, or the
	* OpenIB.org BSD license below:
	*
	* Redistribution and use in source and binary forms, with or
	* without modification, are permitted provided that the following
	* conditions are met:
	*
	* - Redistributions of source code must retain the above
	* copyright notice, this list of conditions and the following
	* disclaimer.
	*
	* - Redistributions in binary form must reproduce the above
	* copyright notice, this list of conditions and the following
	* disclaimer in the documentation and/or other materials
	* provided with the distribution.
	*
	* 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 __CXGB4_OFLD_H
	#define __CXGB4_OFLD_H

	#include <linux/cache.h>
	#include <linux/spinlock.h>
	#include <linux/skbuff.h>
	#include <linux/atomic.h>

	/* CPL message priority levels */
	enum {
	CPL_PRIORITY_DATA = 0, /* data messages */
	CPL_PRIORITY_SETUP = 1, /* connection setup messages */
	CPL_PRIORITY_TEARDOWN = 0, /* connection teardown messages */
	CPL_PRIORITY_LISTEN = 1, /* listen start/stop messages */
	CPL_PRIORITY_ACK = 1, /* RX ACK messages */
	CPL_PRIORITY_CONTROL = 1 /* control messages */
	};

	#define INIT_TP_WR(w, tid) do { \
	(w)->wr.wr_hi = htonl(FW_WR_OP(FW_TP_WR) \| \
	FW_WR_IMMDLEN(sizeof(*w) - sizeof(w->wr))); \
	(w)->wr.wr_mid = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*w), 16)) \| \
	FW_WR_FLOWID(tid)); \
	(w)->wr.wr_lo = cpu_to_be64(0); \
	} while (0)

	#define INIT_TP_WR_CPL(w, cpl, tid) do { \
	INIT_TP_WR(w, tid); \
	OPCODE_TID(w) = htonl(MK_OPCODE_TID(cpl, tid)); \
	} while (0)

	#define INIT_ULPTX_WR(w, wrlen, atomic, tid) do { \
	(w)->wr.wr_hi = htonl(FW_WR_OP(FW_ULPTX_WR) \| FW_WR_ATOMIC(atomic)); \
	(w)->wr.wr_mid = htonl(FW_WR_LEN16(DIV_ROUND_UP(wrlen, 16)) \| \
	FW_WR_FLOWID(tid)); \
	(w)->wr.wr_lo = cpu_to_be64(0); \
	} while (0)

	/* Special asynchronous notification message */
	#define CXGB4_MSG_AN ((void *)1)

	struct serv_entry {
	void *data;
	};

	union aopen_entry {
	void *data;
	union aopen_entry *next;
	};

	/*
	* Holds the size, base address, free list start, etc of the TID, server TID,
	* and active-open TID tables. The tables themselves are allocated dynamically.
	*/
	struct tid_info {
	void **tid_tab;
	unsigned int ntids;

	struct serv_entry *stid_tab;
	unsigned long *stid_bmap;
	unsigned int nstids;
	unsigned int stid_base;

	union aopen_entry *atid_tab;
	unsigned int natids;

	unsigned int nftids;
	unsigned int ftid_base;

	spinlock_t atid_lock ____cacheline_aligned_in_smp;
	union aopen_entry *afree;
	unsigned int atids_in_use;

	spinlock_t stid_lock;
	unsigned int stids_in_use;

	atomic_t tids_in_use;
	};

	static inline void lookup_tid(const struct tid_info t, unsigned int tid)
	{
	return tid < t->ntids ? t->tid_tab[tid] : NULL;
	}

	static inline void lookup_atid(const struct tid_info t, unsigned int atid)
	{
	return atid < t->natids ? t->atid_tab[atid].data : NULL;
	}

	static inline void lookup_stid(const struct tid_info t, unsigned int stid)
	{
	stid -= t->stid_base;
	return stid < t->nstids ? t->stid_tab[stid].data : NULL;
	}

	static inline void cxgb4_insert_tid(struct tid_info t, void data,
	unsigned int tid)
	{
	t->tid_tab[tid] = data;
	atomic_inc(&t->tids_in_use);
	}

	int cxgb4_alloc_atid(struct tid_info t, void data);
	int cxgb4_alloc_stid(struct tid_info t, int family, void data);
	void cxgb4_free_atid(struct tid_info *t, unsigned int atid);
	void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family);
	void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid);

	struct in6_addr;

	int cxgb4_create_server(const struct net_device *dev, unsigned int stid,
	__be32 sip, __be16 sport, unsigned int queue);

	static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue)
	{
	skb_set_queue_mapping(skb, (queue << 1) \| prio);
	}

	enum cxgb4_uld {
	CXGB4_ULD_RDMA,
	CXGB4_ULD_ISCSI,
	CXGB4_ULD_MAX
	};

	enum cxgb4_state {
	CXGB4_STATE_UP,
	CXGB4_STATE_START_RECOVERY,
	CXGB4_STATE_DOWN,
	CXGB4_STATE_DETACH
	};

	enum cxgb4_control {
	CXGB4_CONTROL_DB_FULL,
	CXGB4_CONTROL_DB_EMPTY,
	CXGB4_CONTROL_DB_DROP,
	};

	struct pci_dev;
	struct l2t_data;
	struct net_device;
	struct pkt_gl;
	struct tp_tcp_stats;

	struct cxgb4_range {
	unsigned int start;
	unsigned int size;
	};

	struct cxgb4_virt_res { /* virtualized HW resources */
	struct cxgb4_range ddp;
	struct cxgb4_range iscsi;
	struct cxgb4_range stag;
	struct cxgb4_range rq;
	struct cxgb4_range pbl;
	struct cxgb4_range qp;
	struct cxgb4_range cq;
	struct cxgb4_range ocq;
	};

	#define OCQ_WIN_OFFSET(pdev, vres) \
	(pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size))

	/*
	* Block of information the LLD provides to ULDs attaching to a device.
	*/
	struct cxgb4_lld_info {
	struct pci_dev pdev; / associated PCI device */
	struct l2t_data l2t; / L2 table */
	struct tid_info tids; / TID table */
	struct net_device *ports; / device ports */
	const struct cxgb4_virt_res vr; / assorted HW resources */
	const unsigned short mtus; / MTU table */
	const unsigned short rxq_ids; / the ULD's Rx queue ids */
	unsigned short nrxq; /* # of Rx queues */
	unsigned short ntxq; /* # of Tx queues */
	unsigned char nchan:4; /* # of channels */
	unsigned char nports:4; /* # of ports */
	unsigned char wr_cred; /* WR 16-byte credits */
	unsigned char adapter_type; /* type of adapter */
	unsigned char fw_api_ver; /* FW API version */
	unsigned int fw_vers; /* FW version */
	unsigned int iscsi_iolen; /* iSCSI max I/O length */
	unsigned short udb_density; /* # of user DB/page */
	unsigned short ucq_density; /* # of user CQs/page */
	void __iomem gts_reg; / address of GTS register */
	void __iomem db_reg; / address of kernel doorbell */
	int dbfifo_int_thresh; /* doorbell fifo int threshold */
	};

	struct cxgb4_uld_info {
	const char *name;
	void (add)(const struct cxgb4_lld_info *p);
	int (rx_handler)(void handle, const __be64 *rsp,
	const struct pkt_gl *gl);
	int (state_change)(void handle, enum cxgb4_state new_state);
	int (control)(void handle, enum cxgb4_control control, ...);
	};

	int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p);
	int cxgb4_unregister_uld(enum cxgb4_uld type);
	int cxgb4_ofld_send(struct net_device dev, struct sk_buff skb);
	unsigned int cxgb4_dbfifo_count(const struct net_device *dev, int lpfifo);
	unsigned int cxgb4_port_chan(const struct net_device *dev);
	unsigned int cxgb4_port_viid(const struct net_device *dev);
	unsigned int cxgb4_port_idx(const struct net_device *dev);
	unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu,
	unsigned int *idx);
	void cxgb4_get_tcp_stats(struct pci_dev pdev, struct tp_tcp_stats v4,
	struct tp_tcp_stats *v6);
	void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask,
	const unsigned int *pgsz_order);
	struct sk_buff cxgb4_pktgl_to_skb(const struct pkt_gl gl,
	unsigned int skb_len, unsigned int pull_len);
	int cxgb4_sync_txq_pidx(struct net_device *dev, u16 qid, u16 pidx, u16 size);
	int cxgb4_flush_eq_cache(struct net_device *dev);
	#endif /* !__CXGB4_OFLD_H */