2 * Copyright (c) 2003-2007 Chelsio, Inc. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
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29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 /* This file should not be included directly. Include common.h instead. */
35 #ifndef __T3_ADAPTER_H__
36 #define __T3_ADAPTER_H__
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>
45 #include <asm/semaphore.h>
46 #include <asm/bitops.h>
49 typedef irqreturn_t(*intr_handler_t) (int, void *);
54 struct vlan_group *vlan_grp;
55 const struct port_type_info *port_type;
62 struct link_config link_config;
63 struct net_device_stats netstats;
67 enum { /* adapter flags */
68 FULL_INIT_DONE = (1 << 0),
70 USING_MSIX = (1 << 2),
71 QUEUES_BOUND = (1 << 3),
78 struct skb_frag_struct frag;
82 struct sge_fl { /* SGE per free-buffer list state */
83 unsigned int buf_size; /* size of each Rx buffer */
84 unsigned int credits; /* # of available Rx buffers */
85 unsigned int size; /* capacity of free list */
86 unsigned int cidx; /* consumer index */
87 unsigned int pidx; /* producer index */
88 unsigned int gen; /* free list generation */
89 unsigned int cntxt_id; /* SGE context id for the free list */
90 struct sge_fl_page page;
91 struct rx_desc *desc; /* address of HW Rx descriptor ring */
92 struct rx_sw_desc *sdesc; /* address of SW Rx descriptor ring */
93 dma_addr_t phys_addr; /* physical address of HW ring start */
94 unsigned long empty; /* # of times queue ran out of buffers */
95 unsigned long alloc_failed; /* # of times buffer allocation failed */
99 * Bundle size for grouping offload RX packets for delivery to the stack.
100 * Don't make this too big as we do prefetch on each packet in a bundle.
102 # define RX_BUNDLE_SIZE 8
106 struct sge_rspq { /* state for an SGE response queue */
107 unsigned int credits; /* # of pending response credits */
108 unsigned int size; /* capacity of response queue */
109 unsigned int cidx; /* consumer index */
110 unsigned int gen; /* current generation bit */
111 unsigned int polling; /* is the queue serviced through NAPI? */
112 unsigned int holdoff_tmr; /* interrupt holdoff timer in 100ns */
113 unsigned int next_holdoff; /* holdoff time for next interrupt */
114 struct rsp_desc *desc; /* address of HW response ring */
115 dma_addr_t phys_addr; /* physical address of the ring */
116 unsigned int cntxt_id; /* SGE context id for the response q */
117 spinlock_t lock; /* guards response processing */
118 struct sk_buff *rx_head; /* offload packet receive queue head */
119 struct sk_buff *rx_tail; /* offload packet receive queue tail */
121 unsigned long offload_pkts;
122 unsigned long offload_bundles;
123 unsigned long eth_pkts; /* # of ethernet packets */
124 unsigned long pure_rsps; /* # of pure (non-data) responses */
125 unsigned long imm_data; /* responses with immediate data */
126 unsigned long rx_drops; /* # of packets dropped due to no mem */
127 unsigned long async_notif; /* # of asynchronous notification events */
128 unsigned long empty; /* # of times queue ran out of credits */
129 unsigned long nomem; /* # of responses deferred due to no mem */
130 unsigned long unhandled_irqs; /* # of spurious intrs */
131 unsigned long starved;
132 unsigned long restarted;
138 struct sge_txq { /* state for an SGE Tx queue */
139 unsigned long flags; /* HW DMA fetch status */
140 unsigned int in_use; /* # of in-use Tx descriptors */
141 unsigned int size; /* # of descriptors */
142 unsigned int processed; /* total # of descs HW has processed */
143 unsigned int cleaned; /* total # of descs SW has reclaimed */
144 unsigned int stop_thres; /* SW TX queue suspend threshold */
145 unsigned int cidx; /* consumer index */
146 unsigned int pidx; /* producer index */
147 unsigned int gen; /* current value of generation bit */
148 unsigned int unacked; /* Tx descriptors used since last COMPL */
149 struct tx_desc *desc; /* address of HW Tx descriptor ring */
150 struct tx_sw_desc *sdesc; /* address of SW Tx descriptor ring */
151 spinlock_t lock; /* guards enqueueing of new packets */
152 unsigned int token; /* WR token */
153 dma_addr_t phys_addr; /* physical address of the ring */
154 struct sk_buff_head sendq; /* List of backpressured offload packets */
155 struct tasklet_struct qresume_tsk; /* restarts the queue */
156 unsigned int cntxt_id; /* SGE context id for the Tx q */
157 unsigned long stops; /* # of times q has been stopped */
158 unsigned long restarts; /* # of queue restarts */
161 enum { /* per port SGE statistics */
162 SGE_PSTAT_TSO, /* # of TSO requests */
163 SGE_PSTAT_RX_CSUM_GOOD, /* # of successful RX csum offloads */
164 SGE_PSTAT_TX_CSUM, /* # of TX checksum offloads */
165 SGE_PSTAT_VLANEX, /* # of VLAN tag extractions */
166 SGE_PSTAT_VLANINS, /* # of VLAN tag insertions */
168 SGE_PSTAT_MAX /* must be last */
171 struct sge_qset { /* an SGE queue set */
172 struct sge_rspq rspq;
173 struct sge_fl fl[SGE_RXQ_PER_SET];
174 struct sge_txq txq[SGE_TXQ_PER_SET];
175 struct net_device *netdev; /* associated net device */
176 unsigned long txq_stopped; /* which Tx queues are stopped */
177 struct timer_list tx_reclaim_timer; /* reclaims TX buffers */
178 unsigned long port_stats[SGE_PSTAT_MAX];
179 } ____cacheline_aligned;
182 struct sge_qset qs[SGE_QSETS];
183 spinlock_t reg_lock; /* guards non-atomic SGE registers (eg context) */
188 struct list_head adapter_list;
190 struct pci_dev *pdev;
191 unsigned long registered_device_map;
192 unsigned long open_device_map;
197 unsigned int mmio_len;
199 struct adapter_params params;
200 unsigned int slow_intr_mask;
201 unsigned long irq_stats[IRQ_NUM_STATS];
206 } msix_info[SGE_QSETS + 1];
215 struct net_device *port[MAX_NPORTS];
216 unsigned int check_task_cnt;
217 struct delayed_work adap_check_task;
218 struct work_struct ext_intr_handler_task;
221 * Dummy netdevices are needed when using multiple receive queues with
222 * NAPI as each netdevice can service only one queue.
224 struct net_device *dummy_netdev[SGE_QSETS - 1];
226 struct dentry *debugfs_root;
228 struct mutex mdio_lock;
229 spinlock_t stats_lock;
230 spinlock_t work_lock;
233 static inline u32 t3_read_reg(struct adapter *adapter, u32 reg_addr)
235 u32 val = readl(adapter->regs + reg_addr);
237 CH_DBG(adapter, MMIO, "read register 0x%x value 0x%x\n", reg_addr, val);
241 static inline void t3_write_reg(struct adapter *adapter, u32 reg_addr, u32 val)
243 CH_DBG(adapter, MMIO, "setting register 0x%x to 0x%x\n", reg_addr, val);
244 writel(val, adapter->regs + reg_addr);
247 static inline struct port_info *adap2pinfo(struct adapter *adap, int idx)
249 return netdev_priv(adap->port[idx]);
253 * We use the spare atalk_ptr to map a net device to its SGE queue set.
254 * This is a macro so it can be used as l-value.
256 #define dev2qset(netdev) ((netdev)->atalk_ptr)
258 #define OFFLOAD_DEVMAP_BIT 15
260 #define tdev2adap(d) container_of(d, struct adapter, tdev)
262 static inline int offload_running(struct adapter *adapter)
264 return test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map);
267 int t3_offload_tx(struct t3cdev *tdev, struct sk_buff *skb);
269 void t3_os_ext_intr_handler(struct adapter *adapter);
270 void t3_os_link_changed(struct adapter *adapter, int port_id, int link_status,
271 int speed, int duplex, int fc);
273 void t3_sge_start(struct adapter *adap);
274 void t3_sge_stop(struct adapter *adap);
275 void t3_free_sge_resources(struct adapter *adap);
276 void t3_sge_err_intr_handler(struct adapter *adapter);
277 intr_handler_t t3_intr_handler(struct adapter *adap, int polling);
278 int t3_eth_xmit(struct sk_buff *skb, struct net_device *dev);
279 int t3_mgmt_tx(struct adapter *adap, struct sk_buff *skb);
280 void t3_update_qset_coalesce(struct sge_qset *qs, const struct qset_params *p);
281 int t3_sge_alloc_qset(struct adapter *adapter, unsigned int id, int nports,
282 int irq_vec_idx, const struct qset_params *p,
283 int ntxq, struct net_device *netdev);
284 int t3_get_desc(const struct sge_qset *qs, unsigned int qnum, unsigned int idx,
285 unsigned char *data);
286 irqreturn_t t3_sge_intr_msix(int irq, void *cookie);
288 #endif /* __T3_ADAPTER_H__ */