240 lines
7.6 KiB
C
240 lines
7.6 KiB
C
/*
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* This file is part of the Chelsio T4 Ethernet driver for Linux.
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*
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* Copyright (c) 2003-2010 Chelsio Communications, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef __CXGB4_OFLD_H
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#define __CXGB4_OFLD_H
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#include <linux/cache.h>
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#include <linux/spinlock.h>
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#include <linux/skbuff.h>
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#include <linux/atomic.h>
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/* CPL message priority levels */
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enum {
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CPL_PRIORITY_DATA = 0, /* data messages */
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CPL_PRIORITY_SETUP = 1, /* connection setup messages */
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CPL_PRIORITY_TEARDOWN = 0, /* connection teardown messages */
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CPL_PRIORITY_LISTEN = 1, /* listen start/stop messages */
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CPL_PRIORITY_ACK = 1, /* RX ACK messages */
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CPL_PRIORITY_CONTROL = 1 /* control messages */
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};
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#define INIT_TP_WR(w, tid) do { \
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(w)->wr.wr_hi = htonl(FW_WR_OP(FW_TP_WR) | \
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FW_WR_IMMDLEN(sizeof(*w) - sizeof(w->wr))); \
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(w)->wr.wr_mid = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*w), 16)) | \
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FW_WR_FLOWID(tid)); \
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(w)->wr.wr_lo = cpu_to_be64(0); \
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} while (0)
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#define INIT_TP_WR_CPL(w, cpl, tid) do { \
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INIT_TP_WR(w, tid); \
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OPCODE_TID(w) = htonl(MK_OPCODE_TID(cpl, tid)); \
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} while (0)
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#define INIT_ULPTX_WR(w, wrlen, atomic, tid) do { \
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(w)->wr.wr_hi = htonl(FW_WR_OP(FW_ULPTX_WR) | FW_WR_ATOMIC(atomic)); \
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(w)->wr.wr_mid = htonl(FW_WR_LEN16(DIV_ROUND_UP(wrlen, 16)) | \
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FW_WR_FLOWID(tid)); \
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(w)->wr.wr_lo = cpu_to_be64(0); \
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} while (0)
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/* Special asynchronous notification message */
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#define CXGB4_MSG_AN ((void *)1)
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struct serv_entry {
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void *data;
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};
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union aopen_entry {
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void *data;
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union aopen_entry *next;
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};
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/*
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* Holds the size, base address, free list start, etc of the TID, server TID,
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* and active-open TID tables. The tables themselves are allocated dynamically.
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*/
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struct tid_info {
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void **tid_tab;
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unsigned int ntids;
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struct serv_entry *stid_tab;
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unsigned long *stid_bmap;
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unsigned int nstids;
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unsigned int stid_base;
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union aopen_entry *atid_tab;
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unsigned int natids;
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unsigned int nftids;
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unsigned int ftid_base;
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spinlock_t atid_lock ____cacheline_aligned_in_smp;
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union aopen_entry *afree;
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unsigned int atids_in_use;
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spinlock_t stid_lock;
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unsigned int stids_in_use;
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atomic_t tids_in_use;
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};
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static inline void *lookup_tid(const struct tid_info *t, unsigned int tid)
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{
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return tid < t->ntids ? t->tid_tab[tid] : NULL;
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}
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static inline void *lookup_atid(const struct tid_info *t, unsigned int atid)
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{
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return atid < t->natids ? t->atid_tab[atid].data : NULL;
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}
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static inline void *lookup_stid(const struct tid_info *t, unsigned int stid)
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{
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stid -= t->stid_base;
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return stid < t->nstids ? t->stid_tab[stid].data : NULL;
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}
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static inline void cxgb4_insert_tid(struct tid_info *t, void *data,
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unsigned int tid)
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{
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t->tid_tab[tid] = data;
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atomic_inc(&t->tids_in_use);
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}
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int cxgb4_alloc_atid(struct tid_info *t, void *data);
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int cxgb4_alloc_stid(struct tid_info *t, int family, void *data);
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void cxgb4_free_atid(struct tid_info *t, unsigned int atid);
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void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family);
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void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid);
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struct in6_addr;
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int cxgb4_create_server(const struct net_device *dev, unsigned int stid,
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__be32 sip, __be16 sport, unsigned int queue);
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static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue)
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{
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skb_set_queue_mapping(skb, (queue << 1) | prio);
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}
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enum cxgb4_uld {
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CXGB4_ULD_RDMA,
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CXGB4_ULD_ISCSI,
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CXGB4_ULD_MAX
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};
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enum cxgb4_state {
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CXGB4_STATE_UP,
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CXGB4_STATE_START_RECOVERY,
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CXGB4_STATE_DOWN,
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CXGB4_STATE_DETACH
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};
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struct pci_dev;
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struct l2t_data;
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struct net_device;
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struct pkt_gl;
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struct tp_tcp_stats;
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struct cxgb4_range {
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unsigned int start;
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unsigned int size;
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};
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struct cxgb4_virt_res { /* virtualized HW resources */
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struct cxgb4_range ddp;
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struct cxgb4_range iscsi;
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struct cxgb4_range stag;
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struct cxgb4_range rq;
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struct cxgb4_range pbl;
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struct cxgb4_range qp;
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struct cxgb4_range cq;
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struct cxgb4_range ocq;
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};
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#define OCQ_WIN_OFFSET(pdev, vres) \
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(pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size))
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/*
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* Block of information the LLD provides to ULDs attaching to a device.
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*/
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struct cxgb4_lld_info {
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struct pci_dev *pdev; /* associated PCI device */
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struct l2t_data *l2t; /* L2 table */
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struct tid_info *tids; /* TID table */
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struct net_device **ports; /* device ports */
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const struct cxgb4_virt_res *vr; /* assorted HW resources */
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const unsigned short *mtus; /* MTU table */
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const unsigned short *rxq_ids; /* the ULD's Rx queue ids */
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unsigned short nrxq; /* # of Rx queues */
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unsigned short ntxq; /* # of Tx queues */
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unsigned char nchan:4; /* # of channels */
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unsigned char nports:4; /* # of ports */
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unsigned char wr_cred; /* WR 16-byte credits */
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unsigned char adapter_type; /* type of adapter */
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unsigned char fw_api_ver; /* FW API version */
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unsigned int fw_vers; /* FW version */
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unsigned int iscsi_iolen; /* iSCSI max I/O length */
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unsigned short udb_density; /* # of user DB/page */
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unsigned short ucq_density; /* # of user CQs/page */
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void __iomem *gts_reg; /* address of GTS register */
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void __iomem *db_reg; /* address of kernel doorbell */
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};
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struct cxgb4_uld_info {
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const char *name;
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void *(*add)(const struct cxgb4_lld_info *p);
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int (*rx_handler)(void *handle, const __be64 *rsp,
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const struct pkt_gl *gl);
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int (*state_change)(void *handle, enum cxgb4_state new_state);
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};
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int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p);
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int cxgb4_unregister_uld(enum cxgb4_uld type);
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int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb);
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unsigned int cxgb4_port_chan(const struct net_device *dev);
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unsigned int cxgb4_port_viid(const struct net_device *dev);
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unsigned int cxgb4_port_idx(const struct net_device *dev);
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unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu,
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unsigned int *idx);
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void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4,
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struct tp_tcp_stats *v6);
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void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask,
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const unsigned int *pgsz_order);
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struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl,
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unsigned int skb_len, unsigned int pull_len);
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#endif /* !__CXGB4_OFLD_H */
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