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cxgb4: Add remaining driver headers and L2T management 

Signed-off-by: Dimitris Michailidis <dm@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dimitris Michailidis 2010-04-01 15:28:25 +00:00 committed by David S. Miller
parent fd3a47900b
commit 625ba2c2ee
4 changed files with 1714 additions and 0 deletions
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741
drivers/net/cxgb4/cxgb4.h Normal file
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/*
* 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_H__
#define __CXGB4_H__
#include <linux/bitops.h>
#include <linux/cache.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <asm/io.h>
#include "cxgb4_uld.h"
#include "t4_hw.h"
#define FW_VERSION_MAJOR 1
#define FW_VERSION_MINOR 1
#define FW_VERSION_MICRO 0
enum {
MAX_NPORTS = 4, /* max # of ports */
SERNUM_LEN = 16, /* Serial # length */
EC_LEN = 16, /* E/C length */
ID_LEN = 16, /* ID length */
};
enum {
MEM_EDC0,
MEM_EDC1,
MEM_MC
};
enum dev_master {
MASTER_CANT,
MASTER_MAY,
MASTER_MUST
};
enum dev_state {
DEV_STATE_UNINIT,
DEV_STATE_INIT,
DEV_STATE_ERR
};
enum {
PAUSE_RX = 1 << 0,
PAUSE_TX = 1 << 1,
PAUSE_AUTONEG = 1 << 2
};
struct port_stats {
u64 tx_octets; /* total # of octets in good frames */
u64 tx_frames; /* all good frames */
u64 tx_bcast_frames; /* all broadcast frames */
u64 tx_mcast_frames; /* all multicast frames */
u64 tx_ucast_frames; /* all unicast frames */
u64 tx_error_frames; /* all error frames */
u64 tx_frames_64; /* # of Tx frames in a particular range */
u64 tx_frames_65_127;
u64 tx_frames_128_255;
u64 tx_frames_256_511;
u64 tx_frames_512_1023;
u64 tx_frames_1024_1518;
u64 tx_frames_1519_max;
u64 tx_drop; /* # of dropped Tx frames */
u64 tx_pause; /* # of transmitted pause frames */
u64 tx_ppp0; /* # of transmitted PPP prio 0 frames */
u64 tx_ppp1; /* # of transmitted PPP prio 1 frames */
u64 tx_ppp2; /* # of transmitted PPP prio 2 frames */
u64 tx_ppp3; /* # of transmitted PPP prio 3 frames */
u64 tx_ppp4; /* # of transmitted PPP prio 4 frames */
u64 tx_ppp5; /* # of transmitted PPP prio 5 frames */
u64 tx_ppp6; /* # of transmitted PPP prio 6 frames */
u64 tx_ppp7; /* # of transmitted PPP prio 7 frames */
u64 rx_octets; /* total # of octets in good frames */
u64 rx_frames; /* all good frames */
u64 rx_bcast_frames; /* all broadcast frames */
u64 rx_mcast_frames; /* all multicast frames */
u64 rx_ucast_frames; /* all unicast frames */
u64 rx_too_long; /* # of frames exceeding MTU */
u64 rx_jabber; /* # of jabber frames */
u64 rx_fcs_err; /* # of received frames with bad FCS */
u64 rx_len_err; /* # of received frames with length error */
u64 rx_symbol_err; /* symbol errors */
u64 rx_runt; /* # of short frames */
u64 rx_frames_64; /* # of Rx frames in a particular range */
u64 rx_frames_65_127;
u64 rx_frames_128_255;
u64 rx_frames_256_511;
u64 rx_frames_512_1023;
u64 rx_frames_1024_1518;
u64 rx_frames_1519_max;
u64 rx_pause; /* # of received pause frames */
u64 rx_ppp0; /* # of received PPP prio 0 frames */
u64 rx_ppp1; /* # of received PPP prio 1 frames */
u64 rx_ppp2; /* # of received PPP prio 2 frames */
u64 rx_ppp3; /* # of received PPP prio 3 frames */
u64 rx_ppp4; /* # of received PPP prio 4 frames */
u64 rx_ppp5; /* # of received PPP prio 5 frames */
u64 rx_ppp6; /* # of received PPP prio 6 frames */
u64 rx_ppp7; /* # of received PPP prio 7 frames */
u64 rx_ovflow0; /* drops due to buffer-group 0 overflows */
u64 rx_ovflow1; /* drops due to buffer-group 1 overflows */
u64 rx_ovflow2; /* drops due to buffer-group 2 overflows */
u64 rx_ovflow3; /* drops due to buffer-group 3 overflows */
u64 rx_trunc0; /* buffer-group 0 truncated packets */
u64 rx_trunc1; /* buffer-group 1 truncated packets */
u64 rx_trunc2; /* buffer-group 2 truncated packets */
u64 rx_trunc3; /* buffer-group 3 truncated packets */
};
struct lb_port_stats {
u64 octets;
u64 frames;
u64 bcast_frames;
u64 mcast_frames;
u64 ucast_frames;
u64 error_frames;
u64 frames_64;
u64 frames_65_127;
u64 frames_128_255;
u64 frames_256_511;
u64 frames_512_1023;
u64 frames_1024_1518;
u64 frames_1519_max;
u64 drop;
u64 ovflow0;
u64 ovflow1;
u64 ovflow2;
u64 ovflow3;
u64 trunc0;
u64 trunc1;
u64 trunc2;
u64 trunc3;
};
struct tp_tcp_stats {
u32 tcpOutRsts;
u64 tcpInSegs;
u64 tcpOutSegs;
u64 tcpRetransSegs;
};
struct tp_err_stats {
u32 macInErrs[4];
u32 hdrInErrs[4];
u32 tcpInErrs[4];
u32 tnlCongDrops[4];
u32 ofldChanDrops[4];
u32 tnlTxDrops[4];
u32 ofldVlanDrops[4];
u32 tcp6InErrs[4];
u32 ofldNoNeigh;
u32 ofldCongDefer;
};
struct tp_params {
unsigned int ntxchan; /* # of Tx channels */
unsigned int tre; /* log2 of core clocks per TP tick */
};
struct vpd_params {
unsigned int cclk;
u8 ec[EC_LEN + 1];
u8 sn[SERNUM_LEN + 1];
u8 id[ID_LEN + 1];
};
struct pci_params {
unsigned char speed;
unsigned char width;
};
struct adapter_params {
struct tp_params tp;
struct vpd_params vpd;
struct pci_params pci;
unsigned int fw_vers;
unsigned int tp_vers;
u8 api_vers[7];
unsigned short mtus[NMTUS];
unsigned short a_wnd[NCCTRL_WIN];
unsigned short b_wnd[NCCTRL_WIN];
unsigned char nports; /* # of ethernet ports */
unsigned char portvec;
unsigned char rev; /* chip revision */
unsigned char offload;
unsigned int ofldq_wr_cred;
};
struct trace_params {
u32 data[TRACE_LEN / 4];
u32 mask[TRACE_LEN / 4];
unsigned short snap_len;
unsigned short min_len;
unsigned char skip_ofst;
unsigned char skip_len;
unsigned char invert;
unsigned char port;
};
struct link_config {
unsigned short supported; /* link capabilities */
unsigned short advertising; /* advertised capabilities */
unsigned short requested_speed; /* speed user has requested */
unsigned short speed; /* actual link speed */
unsigned char requested_fc; /* flow control user has requested */
unsigned char fc; /* actual link flow control */
unsigned char autoneg; /* autonegotiating? */
unsigned char link_ok; /* link up? */
};
#define FW_LEN16(fw_struct) FW_CMD_LEN16(sizeof(fw_struct) / 16)
enum {
MAX_ETH_QSETS = 32, /* # of Ethernet Tx/Rx queue sets */
MAX_OFLD_QSETS = 16, /* # of offload Tx/Rx queue sets */
MAX_CTRL_QUEUES = NCHAN, /* # of control Tx queues */
MAX_RDMA_QUEUES = NCHAN, /* # of streaming RDMA Rx queues */
};
enum {
MAX_EGRQ = 128, /* max # of egress queues, including FLs */
MAX_INGQ = 64 /* max # of interrupt-capable ingress queues */
};
struct adapter;
struct vlan_group;
struct sge_rspq;
struct port_info {
struct adapter *adapter;
struct vlan_group *vlan_grp;
u16 viid;
s16 xact_addr_filt; /* index of exact MAC address filter */
u16 rss_size; /* size of VI's RSS table slice */
s8 mdio_addr;
u8 port_type;
u8 mod_type;
u8 port_id;
u8 tx_chan;
u8 lport; /* associated offload logical port */
u8 rx_offload; /* CSO, etc */
u8 nqsets; /* # of qsets */
u8 first_qset; /* index of first qset */
struct link_config link_cfg;
};
/* port_info.rx_offload flags */
enum {
RX_CSO = 1 << 0,
};
struct dentry;
struct work_struct;
enum { /* adapter flags */
FULL_INIT_DONE = (1 << 0),
USING_MSI = (1 << 1),
USING_MSIX = (1 << 2),
QUEUES_BOUND = (1 << 3),
FW_OK = (1 << 4),
};
struct rx_sw_desc;
struct sge_fl { /* SGE free-buffer queue state */
unsigned int avail; /* # of available Rx buffers */
unsigned int pend_cred; /* new buffers since last FL DB ring */
unsigned int cidx; /* consumer index */
unsigned int pidx; /* producer index */
unsigned long alloc_failed; /* # of times buffer allocation failed */
unsigned long large_alloc_failed;
unsigned long starving;
/* RO fields */
unsigned int cntxt_id; /* SGE context id for the free list */
unsigned int size; /* capacity of free list */
struct rx_sw_desc *sdesc; /* address of SW Rx descriptor ring */
__be64 *desc; /* address of HW Rx descriptor ring */
dma_addr_t addr; /* bus address of HW ring start */
};
/* A packet gather list */
struct pkt_gl {
skb_frag_t frags[MAX_SKB_FRAGS];
void *va; /* virtual address of first byte */
unsigned int nfrags; /* # of fragments */
unsigned int tot_len; /* total length of fragments */
};
typedef int (*rspq_handler_t)(struct sge_rspq *q, const __be64 *rsp,
const struct pkt_gl *gl);
struct sge_rspq { /* state for an SGE response queue */
struct napi_struct napi;
const __be64 *cur_desc; /* current descriptor in queue */
unsigned int cidx; /* consumer index */
u8 gen; /* current generation bit */
u8 intr_params; /* interrupt holdoff parameters */
u8 next_intr_params; /* holdoff params for next interrupt */
u8 pktcnt_idx; /* interrupt packet threshold */
u8 uld; /* ULD handling this queue */
u8 idx; /* queue index within its group */
int offset; /* offset into current Rx buffer */
u16 cntxt_id; /* SGE context id for the response q */
u16 abs_id; /* absolute SGE id for the response q */
__be64 *desc; /* address of HW response ring */
dma_addr_t phys_addr; /* physical address of the ring */
unsigned int iqe_len; /* entry size */
unsigned int size; /* capacity of response queue */
struct adapter *adap;
struct net_device *netdev; /* associated net device */
rspq_handler_t handler;
};
struct sge_eth_stats { /* Ethernet queue statistics */
unsigned long pkts; /* # of ethernet packets */
unsigned long lro_pkts; /* # of LRO super packets */
unsigned long lro_merged; /* # of wire packets merged by LRO */
unsigned long rx_cso; /* # of Rx checksum offloads */
unsigned long vlan_ex; /* # of Rx VLAN extractions */
unsigned long rx_drops; /* # of packets dropped due to no mem */
};
struct sge_eth_rxq { /* SW Ethernet Rx queue */
struct sge_rspq rspq;
struct sge_fl fl;
struct sge_eth_stats stats;
} ____cacheline_aligned_in_smp;
struct sge_ofld_stats { /* offload queue statistics */
unsigned long pkts; /* # of packets */
unsigned long imm; /* # of immediate-data packets */
unsigned long an; /* # of asynchronous notifications */
unsigned long nomem; /* # of responses deferred due to no mem */
};
struct sge_ofld_rxq { /* SW offload Rx queue */
struct sge_rspq rspq;
struct sge_fl fl;
struct sge_ofld_stats stats;
} ____cacheline_aligned_in_smp;
struct tx_desc {
__be64 flit[8];
};
struct tx_sw_desc;
struct sge_txq {
unsigned int in_use; /* # of in-use Tx descriptors */
unsigned int size; /* # of descriptors */
unsigned int cidx; /* SW consumer index */
unsigned int pidx; /* producer index */
unsigned long stops; /* # of times q has been stopped */
unsigned long restarts; /* # of queue restarts */
unsigned int cntxt_id; /* SGE context id for the Tx q */
struct tx_desc *desc; /* address of HW Tx descriptor ring */
struct tx_sw_desc *sdesc; /* address of SW Tx descriptor ring */
struct sge_qstat *stat; /* queue status entry */
dma_addr_t phys_addr; /* physical address of the ring */
};
struct sge_eth_txq { /* state for an SGE Ethernet Tx queue */
struct sge_txq q;
struct netdev_queue *txq; /* associated netdev TX queue */
unsigned long tso; /* # of TSO requests */
unsigned long tx_cso; /* # of Tx checksum offloads */
unsigned long vlan_ins; /* # of Tx VLAN insertions */
unsigned long mapping_err; /* # of I/O MMU packet mapping errors */
} ____cacheline_aligned_in_smp;
struct sge_ofld_txq { /* state for an SGE offload Tx queue */
struct sge_txq q;
struct adapter *adap;
struct sk_buff_head sendq; /* list of backpressured packets */
struct tasklet_struct qresume_tsk; /* restarts the queue */
u8 full; /* the Tx ring is full */
unsigned long mapping_err; /* # of I/O MMU packet mapping errors */
} ____cacheline_aligned_in_smp;
struct sge_ctrl_txq { /* state for an SGE control Tx queue */
struct sge_txq q;
struct adapter *adap;
struct sk_buff_head sendq; /* list of backpressured packets */
struct tasklet_struct qresume_tsk; /* restarts the queue */
u8 full; /* the Tx ring is full */
} ____cacheline_aligned_in_smp;
struct sge {
struct sge_eth_txq ethtxq[MAX_ETH_QSETS];
struct sge_ofld_txq ofldtxq[MAX_OFLD_QSETS];
struct sge_ctrl_txq ctrlq[MAX_CTRL_QUEUES];
struct sge_eth_rxq ethrxq[MAX_ETH_QSETS];
struct sge_ofld_rxq ofldrxq[MAX_OFLD_QSETS];
struct sge_ofld_rxq rdmarxq[MAX_RDMA_QUEUES];
struct sge_rspq fw_evtq ____cacheline_aligned_in_smp;
struct sge_rspq intrq ____cacheline_aligned_in_smp;
spinlock_t intrq_lock;
u16 max_ethqsets; /* # of available Ethernet queue sets */
u16 ethqsets; /* # of active Ethernet queue sets */
u16 ethtxq_rover; /* Tx queue to clean up next */
u16 ofldqsets; /* # of active offload queue sets */
u16 rdmaqs; /* # of available RDMA Rx queues */
u16 ofld_rxq[MAX_OFLD_QSETS];
u16 rdma_rxq[NCHAN];
u16 timer_val[SGE_NTIMERS];
u8 counter_val[SGE_NCOUNTERS];
unsigned int starve_thres;
u8 idma_state[2];
void *egr_map[MAX_EGRQ]; /* qid->queue egress queue map */
struct sge_rspq *ingr_map[MAX_INGQ]; /* qid->queue ingress queue map */
DECLARE_BITMAP(starving_fl, MAX_EGRQ);
DECLARE_BITMAP(txq_maperr, MAX_EGRQ);
struct timer_list rx_timer; /* refills starving FLs */
struct timer_list tx_timer; /* checks Tx queues */
};
#define for_each_ethrxq(sge, i) for (i = 0; i < (sge)->ethqsets; i++)
#define for_each_ofldrxq(sge, i) for (i = 0; i < (sge)->ofldqsets; i++)
#define for_each_rdmarxq(sge, i) for (i = 0; i < (sge)->rdmaqs; i++)
struct l2t_data;
struct adapter {
void __iomem *regs;
struct pci_dev *pdev;
struct device *pdev_dev;
unsigned long registered_device_map;
unsigned long open_device_map;
unsigned long flags;
const char *name;
int msg_enable;
struct adapter_params params;
struct cxgb4_virt_res vres;
unsigned int swintr;
unsigned int wol;
struct {
unsigned short vec;
char desc[14];
} msix_info[MAX_INGQ + 1];
struct sge sge;
struct net_device *port[MAX_NPORTS];
u8 chan_map[NCHAN]; /* channel -> port map */
struct l2t_data *l2t;
void *uld_handle[CXGB4_ULD_MAX];
struct list_head list_node;
struct tid_info tids;
void **tid_release_head;
spinlock_t tid_release_lock;
struct work_struct tid_release_task;
bool tid_release_task_busy;
struct dentry *debugfs_root;
spinlock_t stats_lock;
};
static inline u32 t4_read_reg(struct adapter *adap, u32 reg_addr)
{
return readl(adap->regs + reg_addr);
}
static inline void t4_write_reg(struct adapter *adap, u32 reg_addr, u32 val)
{
writel(val, adap->regs + reg_addr);
}
#ifndef readq
static inline u64 readq(const volatile void __iomem *addr)
{
return readl(addr) + ((u64)readl(addr + 4) << 32);
}
static inline void writeq(u64 val, volatile void __iomem *addr)
{
writel(val, addr);
writel(val >> 32, addr + 4);
}
#endif
static inline u64 t4_read_reg64(struct adapter *adap, u32 reg_addr)
{
return readq(adap->regs + reg_addr);
}
static inline void t4_write_reg64(struct adapter *adap, u32 reg_addr, u64 val)
{
writeq(val, adap->regs + reg_addr);
}
/**
* netdev2pinfo - return the port_info structure associated with a net_device
* @dev: the netdev
*
* Return the struct port_info associated with a net_device
*/
static inline struct port_info *netdev2pinfo(const struct net_device *dev)
{
return netdev_priv(dev);
}
/**
* adap2pinfo - return the port_info of a port
* @adap: the adapter
* @idx: the port index
*
* Return the port_info structure for the port of the given index.
*/
static inline struct port_info *adap2pinfo(struct adapter *adap, int idx)
{
return netdev_priv(adap->port[idx]);
}
/**
* netdev2adap - return the adapter structure associated with a net_device
* @dev: the netdev
*
* Return the struct adapter associated with a net_device
*/
static inline struct adapter *netdev2adap(const struct net_device *dev)
{
return netdev2pinfo(dev)->adapter;
}
void t4_os_portmod_changed(const struct adapter *adap, int port_id);
void t4_os_link_changed(struct adapter *adap, int port_id, int link_stat);
void *t4_alloc_mem(size_t size);
void t4_free_mem(void *addr);
void t4_free_sge_resources(struct adapter *adap);
irq_handler_t t4_intr_handler(struct adapter *adap);
netdev_tx_t t4_eth_xmit(struct sk_buff *skb, struct net_device *dev);
int t4_ethrx_handler(struct sge_rspq *q, const __be64 *rsp,
const struct pkt_gl *gl);
int t4_mgmt_tx(struct adapter *adap, struct sk_buff *skb);
int t4_ofld_send(struct adapter *adap, struct sk_buff *skb);
int t4_sge_alloc_rxq(struct adapter *adap, struct sge_rspq *iq, bool fwevtq,
struct net_device *dev, int intr_idx,
struct sge_fl *fl, rspq_handler_t hnd);
int t4_sge_alloc_eth_txq(struct adapter *adap, struct sge_eth_txq *txq,
struct net_device *dev, struct netdev_queue *netdevq,
unsigned int iqid);
int t4_sge_alloc_ctrl_txq(struct adapter *adap, struct sge_ctrl_txq *txq,
struct net_device *dev, unsigned int iqid,
unsigned int cmplqid);
int t4_sge_alloc_ofld_txq(struct adapter *adap, struct sge_ofld_txq *txq,
struct net_device *dev, unsigned int iqid);
irqreturn_t t4_sge_intr_msix(int irq, void *cookie);
void t4_sge_init(struct adapter *adap);
void t4_sge_start(struct adapter *adap);
void t4_sge_stop(struct adapter *adap);
#define for_each_port(adapter, iter) \
for (iter = 0; iter < (adapter)->params.nports; ++iter)
static inline unsigned int core_ticks_per_usec(const struct adapter *adap)
{
return adap->params.vpd.cclk / 1000;
}
static inline unsigned int us_to_core_ticks(const struct adapter *adap,
unsigned int us)
{
return (us * adap->params.vpd.cclk) / 1000;
}
void t4_set_reg_field(struct adapter *adap, unsigned int addr, u32 mask,
u32 val);
int t4_wr_mbox_meat(struct adapter *adap, int mbox, const void *cmd, int size,
void *rpl, bool sleep_ok);
static inline int t4_wr_mbox(struct adapter *adap, int mbox, const void *cmd,
int size, void *rpl)
{
return t4_wr_mbox_meat(adap, mbox, cmd, size, rpl, true);
}
static inline int t4_wr_mbox_ns(struct adapter *adap, int mbox, const void *cmd,
int size, void *rpl)
{
return t4_wr_mbox_meat(adap, mbox, cmd, size, rpl, false);
}
void t4_intr_enable(struct adapter *adapter);
void t4_intr_disable(struct adapter *adapter);
void t4_intr_clear(struct adapter *adapter);
int t4_slow_intr_handler(struct adapter *adapter);
int t4_link_start(struct adapter *adap, unsigned int mbox, unsigned int port,
struct link_config *lc);
int t4_restart_aneg(struct adapter *adap, unsigned int mbox, unsigned int port);
int t4_seeprom_wp(struct adapter *adapter, bool enable);
int t4_read_flash(struct adapter *adapter, unsigned int addr,
unsigned int nwords, u32 *data, int byte_oriented);
int t4_load_fw(struct adapter *adapter, const u8 *fw_data, unsigned int size);
int t4_check_fw_version(struct adapter *adapter);
int t4_prep_adapter(struct adapter *adapter);
int t4_port_init(struct adapter *adap, int mbox, int pf, int vf);
void t4_fatal_err(struct adapter *adapter);
void t4_set_vlan_accel(struct adapter *adapter, unsigned int ports, int on);
int t4_set_trace_filter(struct adapter *adapter, const struct trace_params *tp,
int filter_index, int enable);
void t4_get_trace_filter(struct adapter *adapter, struct trace_params *tp,
int filter_index, int *enabled);
int t4_config_rss_range(struct adapter *adapter, int mbox, unsigned int viid,
int start, int n, const u16 *rspq, unsigned int nrspq);
int t4_config_glbl_rss(struct adapter *adapter, int mbox, unsigned int mode,
unsigned int flags);
int t4_read_rss(struct adapter *adapter, u16 *entries);
int t4_mc_read(struct adapter *adap, u32 addr, __be32 *data, u64 *parity);
int t4_edc_read(struct adapter *adap, int idx, u32 addr, __be32 *data,
u64 *parity);
void t4_get_port_stats(struct adapter *adap, int idx, struct port_stats *p);
void t4_get_lb_stats(struct adapter *adap, int idx, struct lb_port_stats *p);
void t4_read_mtu_tbl(struct adapter *adap, u16 *mtus, u8 *mtu_log);
void t4_tp_get_err_stats(struct adapter *adap, struct tp_err_stats *st);
void t4_tp_get_tcp_stats(struct adapter *adap, struct tp_tcp_stats *v4,
struct tp_tcp_stats *v6);
void t4_load_mtus(struct adapter *adap, const unsigned short *mtus,
const unsigned short *alpha, const unsigned short *beta);
void t4_wol_magic_enable(struct adapter *adap, unsigned int port,
const u8 *addr);
int t4_wol_pat_enable(struct adapter *adap, unsigned int port, unsigned int map,
u64 mask0, u64 mask1, unsigned int crc, bool enable);
int t4_fw_hello(struct adapter *adap, unsigned int mbox, unsigned int evt_mbox,
enum dev_master master, enum dev_state *state);
int t4_fw_bye(struct adapter *adap, unsigned int mbox);
int t4_early_init(struct adapter *adap, unsigned int mbox);
int t4_fw_reset(struct adapter *adap, unsigned int mbox, int reset);
int t4_query_params(struct adapter *adap, unsigned int mbox, unsigned int pf,
unsigned int vf, unsigned int nparams, const u32 *params,
u32 *val);
int t4_set_params(struct adapter *adap, unsigned int mbox, unsigned int pf,
unsigned int vf, unsigned int nparams, const u32 *params,
const u32 *val);
int t4_cfg_pfvf(struct adapter *adap, unsigned int mbox, unsigned int pf,
unsigned int vf, unsigned int txq, unsigned int txq_eth_ctrl,
unsigned int rxqi, unsigned int rxq, unsigned int tc,
unsigned int vi, unsigned int cmask, unsigned int pmask,
unsigned int nexact, unsigned int rcaps, unsigned int wxcaps);
int t4_alloc_vi(struct adapter *adap, unsigned int mbox, unsigned int port,
unsigned int pf, unsigned int vf, unsigned int nmac, u8 *mac,
unsigned int *rss_size);
int t4_free_vi(struct adapter *adap, unsigned int mbox, unsigned int pf,
unsigned int vf, unsigned int viid);
int t4_set_rxmode(struct adapter *adap, unsigned int mbox, unsigned int viid,
int mtu, int promisc, int all_multi, int bcast, bool sleep_ok);
int t4_alloc_mac_filt(struct adapter *adap, unsigned int mbox,
unsigned int viid, bool free, unsigned int naddr,
const u8 **addr, u16 *idx, u64 *hash, bool sleep_ok);
int t4_change_mac(struct adapter *adap, unsigned int mbox, unsigned int viid,
int idx, const u8 *addr, bool persist, bool add_smt);
int t4_set_addr_hash(struct adapter *adap, unsigned int mbox, unsigned int viid,
bool ucast, u64 vec, bool sleep_ok);
int t4_enable_vi(struct adapter *adap, unsigned int mbox, unsigned int viid,
bool rx_en, bool tx_en);
int t4_identify_port(struct adapter *adap, unsigned int mbox, unsigned int viid,
unsigned int nblinks);
int t4_mdio_rd(struct adapter *adap, unsigned int mbox, unsigned int phy_addr,
unsigned int mmd, unsigned int reg, u16 *valp);
int t4_mdio_wr(struct adapter *adap, unsigned int mbox, unsigned int phy_addr,
unsigned int mmd, unsigned int reg, u16 val);
int t4_iq_start_stop(struct adapter *adap, unsigned int mbox, bool start,
unsigned int pf, unsigned int vf, unsigned int iqid,
unsigned int fl0id, unsigned int fl1id);
int t4_iq_free(struct adapter *adap, unsigned int mbox, unsigned int pf,
unsigned int vf, unsigned int iqtype, unsigned int iqid,
unsigned int fl0id, unsigned int fl1id);
int t4_eth_eq_free(struct adapter *adap, unsigned int mbox, unsigned int pf,
unsigned int vf, unsigned int eqid);
int t4_ctrl_eq_free(struct adapter *adap, unsigned int mbox, unsigned int pf,
unsigned int vf, unsigned int eqid);
int t4_ofld_eq_free(struct adapter *adap, unsigned int mbox, unsigned int pf,
unsigned int vf, unsigned int eqid);
int t4_handle_fw_rpl(struct adapter *adap, const __be64 *rpl);
#endif /* __CXGB4_H__ */

239
drivers/net/cxgb4/cxgb4_uld.h Normal file
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/*
* 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 <asm/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);
void cxgb4_queue_tid_release(struct tid_info *t, unsigned int chan,
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);
int cxgb4_create_server6(const struct net_device *dev, unsigned int stid,
const struct in6_addr *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
};
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;
};
/*
* 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 */
};
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 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_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);
struct net_device *cxgb4_netdev_by_hwid(struct pci_dev *pdev, unsigned int id);
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);
#endif /* !__CXGB4_OFLD_H */

624
drivers/net/cxgb4/l2t.c Normal file
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/*
* 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.
*/
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/if.h>
#include <linux/if_vlan.h>
#include <linux/jhash.h>
#include <net/neighbour.h>
#include "cxgb4.h"
#include "l2t.h"
#include "t4_msg.h"
#include "t4fw_api.h"
#define VLAN_NONE 0xfff
/* identifies sync vs async L2T_WRITE_REQs */
#define F_SYNC_WR (1 << 12)
enum {
L2T_STATE_VALID, /* entry is up to date */
L2T_STATE_STALE, /* entry may be used but needs revalidation */
L2T_STATE_RESOLVING, /* entry needs address resolution */
L2T_STATE_SYNC_WRITE, /* synchronous write of entry underway */
/* when state is one of the below the entry is not hashed */
L2T_STATE_SWITCHING, /* entry is being used by a switching filter */
L2T_STATE_UNUSED /* entry not in use */
};
struct l2t_data {
rwlock_t lock;
atomic_t nfree; /* number of free entries */
struct l2t_entry *rover; /* starting point for next allocation */
struct l2t_entry l2tab[L2T_SIZE];
};
static inline unsigned int vlan_prio(const struct l2t_entry *e)
{
return e->vlan >> 13;
}
static inline void l2t_hold(struct l2t_data *d, struct l2t_entry *e)
{
if (atomic_add_return(1, &e->refcnt) == 1) /* 0 -> 1 transition */
atomic_dec(&d->nfree);
}
/*
* To avoid having to check address families we do not allow v4 and v6
* neighbors to be on the same hash chain. We keep v4 entries in the first
* half of available hash buckets and v6 in the second.
*/
enum {
L2T_SZ_HALF = L2T_SIZE / 2,
L2T_HASH_MASK = L2T_SZ_HALF - 1
};
static inline unsigned int arp_hash(const u32 *key, int ifindex)
{
return jhash_2words(*key, ifindex, 0) & L2T_HASH_MASK;
}
static inline unsigned int ipv6_hash(const u32 *key, int ifindex)
{
u32 xor = key[0] ^ key[1] ^ key[2] ^ key[3];
return L2T_SZ_HALF + (jhash_2words(xor, ifindex, 0) & L2T_HASH_MASK);
}
static unsigned int addr_hash(const u32 *addr, int addr_len, int ifindex)
{
return addr_len == 4 ? arp_hash(addr, ifindex) :
ipv6_hash(addr, ifindex);
}
/*
* Checks if an L2T entry is for the given IP/IPv6 address. It does not check
* whether the L2T entry and the address are of the same address family.
* Callers ensure an address is only checked against L2T entries of the same
* family, something made trivial by the separation of IP and IPv6 hash chains
* mentioned above. Returns 0 if there's a match,
*/
static int addreq(const struct l2t_entry *e, const u32 *addr)
{
if (e->v6)
return (e->addr[0] ^ addr[0]) | (e->addr[1] ^ addr[1]) |
(e->addr[2] ^ addr[2]) | (e->addr[3] ^ addr[3]);
return e->addr[0] ^ addr[0];
}
static void neigh_replace(struct l2t_entry *e, struct neighbour *n)
{
neigh_hold(n);
if (e->neigh)
neigh_release(e->neigh);
e->neigh = n;
}
/*
* Write an L2T entry. Must be called with the entry locked.
* The write may be synchronous or asynchronous.
*/
static int write_l2e(struct adapter *adap, struct l2t_entry *e, int sync)
{
struct sk_buff *skb;
struct cpl_l2t_write_req *req;
skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
if (!skb)
return -ENOMEM;
req = (struct cpl_l2t_write_req *)__skb_put(skb, sizeof(*req));
INIT_TP_WR(req, 0);
OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_L2T_WRITE_REQ,
e->idx | (sync ? F_SYNC_WR : 0) |
TID_QID(adap->sge.fw_evtq.abs_id)));
req->params = htons(L2T_W_PORT(e->lport) | L2T_W_NOREPLY(!sync));
req->l2t_idx = htons(e->idx);
req->vlan = htons(e->vlan);
if (e->neigh)
memcpy(e->dmac, e->neigh->ha, sizeof(e->dmac));
memcpy(req->dst_mac, e->dmac, sizeof(req->dst_mac));
set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0);
t4_ofld_send(adap, skb);
if (sync && e->state != L2T_STATE_SWITCHING)
e->state = L2T_STATE_SYNC_WRITE;
return 0;
}
/*
* Send packets waiting in an L2T entry's ARP queue. Must be called with the
* entry locked.
*/
static void send_pending(struct adapter *adap, struct l2t_entry *e)
{
while (e->arpq_head) {
struct sk_buff *skb = e->arpq_head;
e->arpq_head = skb->next;
skb->next = NULL;
t4_ofld_send(adap, skb);
}
e->arpq_tail = NULL;
}
/*
* Process a CPL_L2T_WRITE_RPL. Wake up the ARP queue if it completes a
* synchronous L2T_WRITE. Note that the TID in the reply is really the L2T
* index it refers to.
*/
void do_l2t_write_rpl(struct adapter *adap, const struct cpl_l2t_write_rpl *rpl)
{
unsigned int tid = GET_TID(rpl);
unsigned int idx = tid & (L2T_SIZE - 1);
if (unlikely(rpl->status != CPL_ERR_NONE)) {
dev_err(adap->pdev_dev,
"Unexpected L2T_WRITE_RPL status %u for entry %u\n",
rpl->status, idx);
return;
}
if (tid & F_SYNC_WR) {
struct l2t_entry *e = &adap->l2t->l2tab[idx];
spin_lock(&e->lock);
if (e->state != L2T_STATE_SWITCHING) {
send_pending(adap, e);
e->state = (e->neigh->nud_state & NUD_STALE) ?
L2T_STATE_STALE : L2T_STATE_VALID;
}
spin_unlock(&e->lock);
}
}
/*
* Add a packet to an L2T entry's queue of packets awaiting resolution.
* Must be called with the entry's lock held.
*/
static inline void arpq_enqueue(struct l2t_entry *e, struct sk_buff *skb)
{
skb->next = NULL;
if (e->arpq_head)
e->arpq_tail->next = skb;
else
e->arpq_head = skb;
e->arpq_tail = skb;
}
int cxgb4_l2t_send(struct net_device *dev, struct sk_buff *skb,
struct l2t_entry *e)
{
struct adapter *adap = netdev2adap(dev);
again:
switch (e->state) {
case L2T_STATE_STALE: /* entry is stale, kick off revalidation */
neigh_event_send(e->neigh, NULL);
spin_lock_bh(&e->lock);
if (e->state == L2T_STATE_STALE)
e->state = L2T_STATE_VALID;
spin_unlock_bh(&e->lock);
case L2T_STATE_VALID: /* fast-path, send the packet on */
return t4_ofld_send(adap, skb);
case L2T_STATE_RESOLVING:
case L2T_STATE_SYNC_WRITE:
spin_lock_bh(&e->lock);
if (e->state != L2T_STATE_SYNC_WRITE &&
e->state != L2T_STATE_RESOLVING) {
spin_unlock_bh(&e->lock);
goto again;
}
arpq_enqueue(e, skb);
spin_unlock_bh(&e->lock);
if (e->state == L2T_STATE_RESOLVING &&
!neigh_event_send(e->neigh, NULL)) {
spin_lock_bh(&e->lock);
if (e->state == L2T_STATE_RESOLVING && e->arpq_head)
write_l2e(adap, e, 1);
spin_unlock_bh(&e->lock);
}
}
return 0;
}
EXPORT_SYMBOL(cxgb4_l2t_send);
/*
* Allocate a free L2T entry. Must be called with l2t_data.lock held.
*/
static struct l2t_entry *alloc_l2e(struct l2t_data *d)
{
struct l2t_entry *end, *e, **p;
if (!atomic_read(&d->nfree))
return NULL;
/* there's definitely a free entry */
for (e = d->rover, end = &d->l2tab[L2T_SIZE]; e != end; ++e)
if (atomic_read(&e->refcnt) == 0)
goto found;
for (e = d->l2tab; atomic_read(&e->refcnt); ++e)
;
found:
d->rover = e + 1;
atomic_dec(&d->nfree);
/*
* The entry we found may be an inactive entry that is
* presently in the hash table. We need to remove it.
*/
if (e->state < L2T_STATE_SWITCHING)
for (p = &d->l2tab[e->hash].first; *p; p = &(*p)->next)
if (*p == e) {
*p = e->next;
e->next = NULL;
break;
}
e->state = L2T_STATE_UNUSED;
return e;
}
/*
* Called when an L2T entry has no more users.
*/
static void t4_l2e_free(struct l2t_entry *e)
{
struct l2t_data *d;
spin_lock_bh(&e->lock);
if (atomic_read(&e->refcnt) == 0) { /* hasn't been recycled */
if (e->neigh) {
neigh_release(e->neigh);
e->neigh = NULL;
}
}
spin_unlock_bh(&e->lock);
d = container_of(e, struct l2t_data, l2tab[e->idx]);
atomic_inc(&d->nfree);
}
void cxgb4_l2t_release(struct l2t_entry *e)
{
if (atomic_dec_and_test(&e->refcnt))
t4_l2e_free(e);
}
EXPORT_SYMBOL(cxgb4_l2t_release);
/*
* Update an L2T entry that was previously used for the same next hop as neigh.
* Must be called with softirqs disabled.
*/
static void reuse_entry(struct l2t_entry *e, struct neighbour *neigh)
{
unsigned int nud_state;
spin_lock(&e->lock); /* avoid race with t4_l2t_free */
if (neigh != e->neigh)
neigh_replace(e, neigh);
nud_state = neigh->nud_state;
if (memcmp(e->dmac, neigh->ha, sizeof(e->dmac)) ||
!(nud_state & NUD_VALID))
e->state = L2T_STATE_RESOLVING;
else if (nud_state & NUD_CONNECTED)
e->state = L2T_STATE_VALID;
else
e->state = L2T_STATE_STALE;
spin_unlock(&e->lock);
}
struct l2t_entry *cxgb4_l2t_get(struct l2t_data *d, struct neighbour *neigh,
const struct net_device *physdev,
unsigned int priority)
{
u8 lport;
u16 vlan;
struct l2t_entry *e;
int addr_len = neigh->tbl->key_len;
u32 *addr = (u32 *)neigh->primary_key;
int ifidx = neigh->dev->ifindex;
int hash = addr_hash(addr, addr_len, ifidx);
if (neigh->dev->flags & IFF_LOOPBACK)
lport = netdev2pinfo(physdev)->tx_chan + 4;
else
lport = netdev2pinfo(physdev)->lport;
if (neigh->dev->priv_flags & IFF_802_1Q_VLAN)
vlan = vlan_dev_vlan_id(neigh->dev);
else
vlan = VLAN_NONE;
write_lock_bh(&d->lock);
for (e = d->l2tab[hash].first; e; e = e->next)
if (!addreq(e, addr) && e->ifindex == ifidx &&
e->vlan == vlan && e->lport == lport) {
l2t_hold(d, e);
if (atomic_read(&e->refcnt) == 1)
reuse_entry(e, neigh);
goto done;
}
/* Need to allocate a new entry */
e = alloc_l2e(d);
if (e) {
spin_lock(&e->lock); /* avoid race with t4_l2t_free */
e->state = L2T_STATE_RESOLVING;
memcpy(e->addr, addr, addr_len);
e->ifindex = ifidx;
e->hash = hash;
e->lport = lport;
e->v6 = addr_len == 16;
atomic_set(&e->refcnt, 1);
neigh_replace(e, neigh);
e->vlan = vlan;
e->next = d->l2tab[hash].first;
d->l2tab[hash].first = e;
spin_unlock(&e->lock);
}
done:
write_unlock_bh(&d->lock);
return e;
}
EXPORT_SYMBOL(cxgb4_l2t_get);
/*
* Called when address resolution fails for an L2T entry to handle packets
* on the arpq head. If a packet specifies a failure handler it is invoked,
* otherwise the packet is sent to the device.
*/
static void handle_failed_resolution(struct adapter *adap, struct sk_buff *arpq)
{
while (arpq) {
struct sk_buff *skb = arpq;
const struct l2t_skb_cb *cb = L2T_SKB_CB(skb);
arpq = skb->next;
skb->next = NULL;
if (cb->arp_err_handler)
cb->arp_err_handler(cb->handle, skb);
else
t4_ofld_send(adap, skb);
}
}
/*
* Called when the host's neighbor layer makes a change to some entry that is
* loaded into the HW L2 table.
*/
void t4_l2t_update(struct adapter *adap, struct neighbour *neigh)
{
struct l2t_entry *e;
struct sk_buff *arpq = NULL;
struct l2t_data *d = adap->l2t;
int addr_len = neigh->tbl->key_len;
u32 *addr = (u32 *) neigh->primary_key;
int ifidx = neigh->dev->ifindex;
int hash = addr_hash(addr, addr_len, ifidx);
read_lock_bh(&d->lock);
for (e = d->l2tab[hash].first; e; e = e->next)
if (!addreq(e, addr) && e->ifindex == ifidx) {
spin_lock(&e->lock);
if (atomic_read(&e->refcnt))
goto found;
spin_unlock(&e->lock);
break;
}
read_unlock_bh(&d->lock);
return;
found:
read_unlock(&d->lock);
if (neigh != e->neigh)
neigh_replace(e, neigh);
if (e->state == L2T_STATE_RESOLVING) {
if (neigh->nud_state & NUD_FAILED) {
arpq = e->arpq_head;
e->arpq_head = e->arpq_tail = NULL;
} else if ((neigh->nud_state & (NUD_CONNECTED | NUD_STALE)) &&
e->arpq_head) {
write_l2e(adap, e, 1);
}
} else {
e->state = neigh->nud_state & NUD_CONNECTED ?
L2T_STATE_VALID : L2T_STATE_STALE;
if (memcmp(e->dmac, neigh->ha, sizeof(e->dmac)))
write_l2e(adap, e, 0);
}
spin_unlock_bh(&e->lock);
if (arpq)
handle_failed_resolution(adap, arpq);
}
/*
* Allocate an L2T entry for use by a switching rule. Such entries need to be
* explicitly freed and while busy they are not on any hash chain, so normal
* address resolution updates do not see them.
*/
struct l2t_entry *t4_l2t_alloc_switching(struct l2t_data *d)
{
struct l2t_entry *e;
write_lock_bh(&d->lock);
e = alloc_l2e(d);
if (e) {
spin_lock(&e->lock); /* avoid race with t4_l2t_free */
e->state = L2T_STATE_SWITCHING;
atomic_set(&e->refcnt, 1);
spin_unlock(&e->lock);
}
write_unlock_bh(&d->lock);
return e;
}
/*
* Sets/updates the contents of a switching L2T entry that has been allocated
* with an earlier call to @t4_l2t_alloc_switching.
*/
int t4_l2t_set_switching(struct adapter *adap, struct l2t_entry *e, u16 vlan,
u8 port, u8 *eth_addr)
{
e->vlan = vlan;
e->lport = port;
memcpy(e->dmac, eth_addr, ETH_ALEN);
return write_l2e(adap, e, 0);
}
struct l2t_data *t4_init_l2t(void)
{
int i;
struct l2t_data *d;
d = t4_alloc_mem(sizeof(*d));
if (!d)
return NULL;
d->rover = d->l2tab;
atomic_set(&d->nfree, L2T_SIZE);
rwlock_init(&d->lock);
for (i = 0; i < L2T_SIZE; ++i) {
d->l2tab[i].idx = i;
d->l2tab[i].state = L2T_STATE_UNUSED;
spin_lock_init(&d->l2tab[i].lock);
atomic_set(&d->l2tab[i].refcnt, 0);
}
return d;
}
#include <linux/module.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
static inline void *l2t_get_idx(struct seq_file *seq, loff_t pos)
{
struct l2t_entry *l2tab = seq->private;
return pos >= L2T_SIZE ? NULL : &l2tab[pos];
}
static void *l2t_seq_start(struct seq_file *seq, loff_t *pos)
{
return *pos ? l2t_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
}
static void *l2t_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
v = l2t_get_idx(seq, *pos);
if (v)
++*pos;
return v;
}
static void l2t_seq_stop(struct seq_file *seq, void *v)
{
}
static char l2e_state(const struct l2t_entry *e)
{
switch (e->state) {
case L2T_STATE_VALID: return 'V';
case L2T_STATE_STALE: return 'S';
case L2T_STATE_SYNC_WRITE: return 'W';
case L2T_STATE_RESOLVING: return e->arpq_head ? 'A' : 'R';
case L2T_STATE_SWITCHING: return 'X';
default:
return 'U';
}
}
static int l2t_seq_show(struct seq_file *seq, void *v)
{
if (v == SEQ_START_TOKEN)
seq_puts(seq, " Idx IP address "
"Ethernet address VLAN/P LP State Users Port\n");
else {
char ip[60];
struct l2t_entry *e = v;
spin_lock_bh(&e->lock);
if (e->state == L2T_STATE_SWITCHING)
ip[0] = '\0';
else
sprintf(ip, e->v6 ? "%pI6c" : "%pI4", e->addr);
seq_printf(seq, "%4u %-25s %17pM %4d %u %2u %c %5u %s\n",
e->idx, ip, e->dmac,
e->vlan & VLAN_VID_MASK, vlan_prio(e), e->lport,
l2e_state(e), atomic_read(&e->refcnt),
e->neigh ? e->neigh->dev->name : "");
spin_unlock_bh(&e->lock);
}
return 0;
}
static const struct seq_operations l2t_seq_ops = {
.start = l2t_seq_start,
.next = l2t_seq_next,
.stop = l2t_seq_stop,
.show = l2t_seq_show
};
static int l2t_seq_open(struct inode *inode, struct file *file)
{
int rc = seq_open(file, &l2t_seq_ops);
if (!rc) {
struct adapter *adap = inode->i_private;
struct seq_file *seq = file->private_data;
seq->private = adap->l2t->l2tab;
}
return rc;
}
const struct file_operations t4_l2t_fops = {
.owner = THIS_MODULE,
.open = l2t_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};

110
drivers/net/cxgb4/l2t.h Normal file
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@ -0,0 +1,110 @@
/*
* 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_L2T_H
#define __CXGB4_L2T_H
#include <linux/spinlock.h>
#include <linux/if_ether.h>
#include <asm/atomic.h>
struct adapter;
struct l2t_data;
struct neighbour;
struct net_device;
struct file_operations;
struct cpl_l2t_write_rpl;
/*
* Each L2T entry plays multiple roles. First of all, it keeps state for the
* corresponding entry of the HW L2 table and maintains a queue of offload
* packets awaiting address resolution. Second, it is a node of a hash table
* chain, where the nodes of the chain are linked together through their next
* pointer. Finally, each node is a bucket of a hash table, pointing to the
* first element in its chain through its first pointer.
*/
struct l2t_entry {
u16 state; /* entry state */
u16 idx; /* entry index */
u32 addr[4]; /* next hop IP or IPv6 address */
int ifindex; /* neighbor's net_device's ifindex */
struct neighbour *neigh; /* associated neighbour */
struct l2t_entry *first; /* start of hash chain */
struct l2t_entry *next; /* next l2t_entry on chain */
struct sk_buff *arpq_head; /* queue of packets awaiting resolution */
struct sk_buff *arpq_tail;
spinlock_t lock;
atomic_t refcnt; /* entry reference count */
u16 hash; /* hash bucket the entry is on */
u16 vlan; /* VLAN TCI (id: bits 0-11, prio: 13-15 */
u8 v6; /* whether entry is for IPv6 */
u8 lport; /* associated offload logical interface */
u8 dmac[ETH_ALEN]; /* neighbour's MAC address */
};
typedef void (*arp_err_handler_t)(void *handle, struct sk_buff *skb);
/*
* Callback stored in an skb to handle address resolution failure.
*/
struct l2t_skb_cb {
void *handle;
arp_err_handler_t arp_err_handler;
};
#define L2T_SKB_CB(skb) ((struct l2t_skb_cb *)(skb)->cb)
static inline void t4_set_arp_err_handler(struct sk_buff *skb, void *handle,
arp_err_handler_t handler)
{
L2T_SKB_CB(skb)->handle = handle;
L2T_SKB_CB(skb)->arp_err_handler = handler;
}
void cxgb4_l2t_release(struct l2t_entry *e);
int cxgb4_l2t_send(struct net_device *dev, struct sk_buff *skb,
struct l2t_entry *e);
struct l2t_entry *cxgb4_l2t_get(struct l2t_data *d, struct neighbour *neigh,
const struct net_device *physdev,
unsigned int priority);
void t4_l2t_update(struct adapter *adap, struct neighbour *neigh);
struct l2t_entry *t4_l2t_alloc_switching(struct l2t_data *d);
int t4_l2t_set_switching(struct adapter *adap, struct l2t_entry *e, u16 vlan,
u8 port, u8 *eth_addr);
struct l2t_data *t4_init_l2t(void);
void do_l2t_write_rpl(struct adapter *p, const struct cpl_l2t_write_rpl *rpl);
extern const struct file_operations t4_l2t_fops;
#endif /* __CXGB4_L2T_H */