1/* 2 * Copyright (c) 2003-2008 Chelsio, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33/* This file should not be included directly. Include common.h instead. */ 34 35#ifndef __T3_ADAPTER_H__ 36#define __T3_ADAPTER_H__ 37 38#include <linux/pci.h> 39#include <linux/spinlock.h> 40#include <linux/interrupt.h> 41#include <linux/timer.h> 42#include <linux/cache.h> 43#include <linux/mutex.h> 44#include <linux/bitops.h> 45#include "t3cdev.h" 46#include <asm/io.h> 47 48struct vlan_group; 49struct adapter; 50struct sge_qset; 51struct port_info; 52 53enum { /* rx_offload flags */ 54 T3_RX_CSUM = 1 << 0, 55 T3_LRO = 1 << 1, 56}; 57 58enum mac_idx_types { 59 LAN_MAC_IDX = 0, 60 SAN_MAC_IDX, 61 62 MAX_MAC_IDX 63}; 64 65struct iscsi_config { 66 __u8 mac_addr[ETH_ALEN]; 67 __u32 flags; 68 int (*send)(struct port_info *pi, struct sk_buff **skb); 69 int (*recv)(struct port_info *pi, struct sk_buff *skb); 70}; 71 72struct port_info { 73 struct adapter *adapter; 74 struct vlan_group *vlan_grp; 75 struct sge_qset *qs; 76 u8 port_id; 77 u8 rx_offload; 78 u8 nqsets; 79 u8 first_qset; 80 struct cphy phy; 81 struct cmac mac; 82 struct link_config link_config; 83 struct net_device_stats netstats; 84 int activity; 85 __be32 iscsi_ipv4addr; 86 struct iscsi_config iscsic; 87 88 int link_fault; /* link fault was detected */ 89}; 90 91enum { /* adapter flags */ 92 FULL_INIT_DONE = (1 << 0), 93 USING_MSI = (1 << 1), 94 USING_MSIX = (1 << 2), 95 QUEUES_BOUND = (1 << 3), 96 TP_PARITY_INIT = (1 << 4), 97 NAPI_INIT = (1 << 5), 98}; 99 100struct fl_pg_chunk { 101 struct page *page; 102 void *va; 103 unsigned int offset; 104 unsigned long *p_cnt; 105 dma_addr_t mapping; 106}; 107 108struct rx_desc; 109struct rx_sw_desc; 110 111struct sge_fl { /* SGE per free-buffer list state */ 112 unsigned int buf_size; /* size of each Rx buffer */ 113 unsigned int credits; /* # of available Rx buffers */ 114 unsigned int pend_cred; /* new buffers since last FL DB ring */ 115 unsigned int size; /* capacity of free list */ 116 unsigned int cidx; /* consumer index */ 117 unsigned int pidx; /* producer index */ 118 unsigned int gen; /* free list generation */ 119 struct fl_pg_chunk pg_chunk;/* page chunk cache */ 120 unsigned int use_pages; /* whether FL uses pages or sk_buffs */ 121 unsigned int order; /* order of page allocations */ 122 unsigned int alloc_size; /* size of allocated buffer */ 123 struct rx_desc *desc; /* address of HW Rx descriptor ring */ 124 struct rx_sw_desc *sdesc; /* address of SW Rx descriptor ring */ 125 dma_addr_t phys_addr; /* physical address of HW ring start */ 126 unsigned int cntxt_id; /* SGE context id for the free list */ 127 unsigned long empty; /* # of times queue ran out of buffers */ 128 unsigned long alloc_failed; /* # of times buffer allocation failed */ 129}; 130 131/* 132 * Bundle size for grouping offload RX packets for delivery to the stack. 133 * Don't make this too big as we do prefetch on each packet in a bundle. 134 */ 135# define RX_BUNDLE_SIZE 8 136 137struct rsp_desc; 138 139struct sge_rspq { /* state for an SGE response queue */ 140 unsigned int credits; /* # of pending response credits */ 141 unsigned int size; /* capacity of response queue */ 142 unsigned int cidx; /* consumer index */ 143 unsigned int gen; /* current generation bit */ 144 unsigned int polling; /* is the queue serviced through NAPI? */ 145 unsigned int holdoff_tmr; /* interrupt holdoff timer in 100ns */ 146 unsigned int next_holdoff; /* holdoff time for next interrupt */ 147 unsigned int rx_recycle_buf; /* whether recycling occurred 148 within current sop-eop */ 149 struct rsp_desc *desc; /* address of HW response ring */ 150 dma_addr_t phys_addr; /* physical address of the ring */ 151 unsigned int cntxt_id; /* SGE context id for the response q */ 152 spinlock_t lock; /* guards response processing */ 153 struct sk_buff_head rx_queue; /* offload packet receive queue */ 154 struct sk_buff *pg_skb; /* used to build frag list in napi handler */ 155 156 unsigned long offload_pkts; 157 unsigned long offload_bundles; 158 unsigned long eth_pkts; /* # of ethernet packets */ 159 unsigned long pure_rsps; /* # of pure (non-data) responses */ 160 unsigned long imm_data; /* responses with immediate data */ 161 unsigned long rx_drops; /* # of packets dropped due to no mem */ 162 unsigned long async_notif; /* # of asynchronous notification events */ 163 unsigned long empty; /* # of times queue ran out of credits */ 164 unsigned long nomem; /* # of responses deferred due to no mem */ 165 unsigned long unhandled_irqs; /* # of spurious intrs */ 166 unsigned long starved; 167 unsigned long restarted; 168}; 169 170struct tx_desc; 171struct tx_sw_desc; 172 173struct sge_txq { /* state for an SGE Tx queue */ 174 unsigned long flags; /* HW DMA fetch status */ 175 unsigned int in_use; /* # of in-use Tx descriptors */ 176 unsigned int size; /* # of descriptors */ 177 unsigned int processed; /* total # of descs HW has processed */ 178 unsigned int cleaned; /* total # of descs SW has reclaimed */ 179 unsigned int stop_thres; /* SW TX queue suspend threshold */ 180 unsigned int cidx; /* consumer index */ 181 unsigned int pidx; /* producer index */ 182 unsigned int gen; /* current value of generation bit */ 183 unsigned int unacked; /* Tx descriptors used since last COMPL */ 184 struct tx_desc *desc; /* address of HW Tx descriptor ring */ 185 struct tx_sw_desc *sdesc; /* address of SW Tx descriptor ring */ 186 spinlock_t lock; /* guards enqueueing of new packets */ 187 unsigned int token; /* WR token */ 188 dma_addr_t phys_addr; /* physical address of the ring */ 189 struct sk_buff_head sendq; /* List of backpressured offload packets */ 190 struct tasklet_struct qresume_tsk; /* restarts the queue */ 191 unsigned int cntxt_id; /* SGE context id for the Tx q */ 192 unsigned long stops; /* # of times q has been stopped */ 193 unsigned long restarts; /* # of queue restarts */ 194}; 195 196enum { /* per port SGE statistics */ 197 SGE_PSTAT_TSO, /* # of TSO requests */ 198 SGE_PSTAT_RX_CSUM_GOOD, /* # of successful RX csum offloads */ 199 SGE_PSTAT_TX_CSUM, /* # of TX checksum offloads */ 200 SGE_PSTAT_VLANEX, /* # of VLAN tag extractions */ 201 SGE_PSTAT_VLANINS, /* # of VLAN tag insertions */ 202 203 SGE_PSTAT_MAX /* must be last */ 204}; 205 206struct napi_gro_fraginfo; 207 208struct sge_qset { /* an SGE queue set */ 209 struct adapter *adap; 210 struct napi_struct napi; 211 struct sge_rspq rspq; 212 struct sge_fl fl[SGE_RXQ_PER_SET]; 213 struct sge_txq txq[SGE_TXQ_PER_SET]; 214 int nomem; 215 int lro_enabled; 216 void *lro_va; 217 struct net_device *netdev; 218 struct netdev_queue *tx_q; /* associated netdev TX queue */ 219 unsigned long txq_stopped; /* which Tx queues are stopped */ 220 struct timer_list tx_reclaim_timer; /* reclaims TX buffers */ 221 struct timer_list rx_reclaim_timer; /* reclaims RX buffers */ 222 unsigned long port_stats[SGE_PSTAT_MAX]; 223} ____cacheline_aligned; 224 225struct sge { 226 struct sge_qset qs[SGE_QSETS]; 227 spinlock_t reg_lock; /* guards non-atomic SGE registers (eg context) */ 228}; 229 230struct adapter { 231 struct t3cdev tdev; 232 struct list_head adapter_list; 233 void __iomem *regs; 234 struct pci_dev *pdev; 235 unsigned long registered_device_map; 236 unsigned long open_device_map; 237 unsigned long flags; 238 239 const char *name; 240 int msg_enable; 241 unsigned int mmio_len; 242 243 struct adapter_params params; 244 unsigned int slow_intr_mask; 245 unsigned long irq_stats[IRQ_NUM_STATS]; 246 247 int msix_nvectors; 248 struct { 249 unsigned short vec; 250 char desc[22]; 251 } msix_info[SGE_QSETS + 1]; 252 253 /* T3 modules */ 254 struct sge sge; 255 struct mc7 pmrx; 256 struct mc7 pmtx; 257 struct mc7 cm; 258 struct mc5 mc5; 259 260 struct net_device *port[MAX_NPORTS]; 261 unsigned int check_task_cnt; 262 struct delayed_work adap_check_task; 263 struct work_struct ext_intr_handler_task; 264 struct work_struct fatal_error_handler_task; 265 struct work_struct link_fault_handler_task; 266 267 struct work_struct db_full_task; 268 struct work_struct db_empty_task; 269 struct work_struct db_drop_task; 270 271 struct dentry *debugfs_root; 272 273 struct mutex mdio_lock; 274 spinlock_t stats_lock; 275 spinlock_t work_lock; 276 277 struct sk_buff *nofail_skb; 278}; 279 280static inline u32 t3_read_reg(struct adapter *adapter, u32 reg_addr) 281{ 282 u32 val = readl(adapter->regs + reg_addr); 283 284 CH_DBG(adapter, MMIO, "read register 0x%x value 0x%x\n", reg_addr, val); 285 return val; 286} 287 288static inline void t3_write_reg(struct adapter *adapter, u32 reg_addr, u32 val) 289{ 290 CH_DBG(adapter, MMIO, "setting register 0x%x to 0x%x\n", reg_addr, val); 291 writel(val, adapter->regs + reg_addr); 292} 293 294static inline struct port_info *adap2pinfo(struct adapter *adap, int idx) 295{ 296 return netdev_priv(adap->port[idx]); 297} 298 299static inline int phy2portid(struct cphy *phy) 300{ 301 struct adapter *adap = phy->adapter; 302 struct port_info *port0 = adap2pinfo(adap, 0); 303 304 return &port0->phy == phy ? 0 : 1; 305} 306 307#define OFFLOAD_DEVMAP_BIT 15 308 309#define tdev2adap(d) container_of(d, struct adapter, tdev) 310 311static inline int offload_running(struct adapter *adapter) 312{ 313 return test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map); 314} 315 316int t3_offload_tx(struct t3cdev *tdev, struct sk_buff *skb); 317 318void t3_os_ext_intr_handler(struct adapter *adapter); 319void t3_os_link_changed(struct adapter *adapter, int port_id, int link_status, 320 int speed, int duplex, int fc); 321void t3_os_phymod_changed(struct adapter *adap, int port_id); 322void t3_os_link_fault(struct adapter *adapter, int port_id, int state); 323void t3_os_link_fault_handler(struct adapter *adapter, int port_id); 324 325void t3_sge_start(struct adapter *adap); 326void t3_sge_stop(struct adapter *adap); 327void t3_start_sge_timers(struct adapter *adap); 328void t3_stop_sge_timers(struct adapter *adap); 329void t3_free_sge_resources(struct adapter *adap); 330void t3_sge_err_intr_handler(struct adapter *adapter); 331irq_handler_t t3_intr_handler(struct adapter *adap, int polling); 332netdev_tx_t t3_eth_xmit(struct sk_buff *skb, struct net_device *dev); 333int t3_mgmt_tx(struct adapter *adap, struct sk_buff *skb); 334void t3_update_qset_coalesce(struct sge_qset *qs, const struct qset_params *p); 335int t3_sge_alloc_qset(struct adapter *adapter, unsigned int id, int nports, 336 int irq_vec_idx, const struct qset_params *p, 337 int ntxq, struct net_device *dev, 338 struct netdev_queue *netdevq); 339int t3_get_desc(const struct sge_qset *qs, unsigned int qnum, unsigned int idx, 340 unsigned char *data); 341irqreturn_t t3_sge_intr_msix(int irq, void *cookie); 342extern struct workqueue_struct *cxgb3_wq; 343 344int t3_get_edc_fw(struct cphy *phy, int edc_idx, int size); 345 346#endif /* __T3_ADAPTER_H__ */ 347