cxgb3: prefetch buffer access in GRO mode
[deliverable/linux.git] / drivers / net / cxgb3 / adapter.h
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4d22de3e 1/*
a02d44a0 2 * Copyright (c) 2003-2008 Chelsio, Inc. All rights reserved.
4d22de3e 3 *
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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:
4d22de3e 9 *
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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.
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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>
a13fbee0 43#include <linux/mutex.h>
1977f032 44#include <linux/bitops.h>
4d22de3e 45#include "t3cdev.h"
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46#include <asm/io.h>
47
4d22de3e 48struct vlan_group;
5fbf816f 49struct adapter;
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50struct sge_qset;
51
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52enum { /* rx_offload flags */
53 T3_RX_CSUM = 1 << 0,
54 T3_LRO = 1 << 1,
55};
56
4d22de3e 57struct port_info {
5fbf816f 58 struct adapter *adapter;
4d22de3e 59 struct vlan_group *vlan_grp;
bea3348e 60 struct sge_qset *qs;
4d22de3e 61 u8 port_id;
47fd23fe 62 u8 rx_offload;
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63 u8 nqsets;
64 u8 first_qset;
65 struct cphy phy;
66 struct cmac mac;
67 struct link_config link_config;
68 struct net_device_stats netstats;
69 int activity;
a109a5b9 70 __be32 iscsi_ipv4addr;
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71};
72
73enum { /* adapter flags */
74 FULL_INIT_DONE = (1 << 0),
75 USING_MSI = (1 << 1),
76 USING_MSIX = (1 << 2),
14ab9892 77 QUEUES_BOUND = (1 << 3),
b881955b 78 TP_PARITY_INIT = (1 << 4),
48c4b6db 79 NAPI_INIT = (1 << 5),
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80};
81
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82struct fl_pg_chunk {
83 struct page *page;
84 void *va;
85 unsigned int offset;
86};
87
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88struct rx_desc;
89struct rx_sw_desc;
90
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91struct sge_fl { /* SGE per free-buffer list state */
92 unsigned int buf_size; /* size of each Rx buffer */
93 unsigned int credits; /* # of available Rx buffers */
26b3871d 94 unsigned int pend_cred; /* new buffers since last FL DB ring */
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95 unsigned int size; /* capacity of free list */
96 unsigned int cidx; /* consumer index */
97 unsigned int pidx; /* producer index */
98 unsigned int gen; /* free list generation */
99 struct fl_pg_chunk pg_chunk;/* page chunk cache */
100 unsigned int use_pages; /* whether FL uses pages or sk_buffs */
7385ecf3 101 unsigned int order; /* order of page allocations */
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102 struct rx_desc *desc; /* address of HW Rx descriptor ring */
103 struct rx_sw_desc *sdesc; /* address of SW Rx descriptor ring */
104 dma_addr_t phys_addr; /* physical address of HW ring start */
105 unsigned int cntxt_id; /* SGE context id for the free list */
106 unsigned long empty; /* # of times queue ran out of buffers */
e0994eb1 107 unsigned long alloc_failed; /* # of times buffer allocation failed */
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108};
109
110/*
111 * Bundle size for grouping offload RX packets for delivery to the stack.
112 * Don't make this too big as we do prefetch on each packet in a bundle.
113 */
114# define RX_BUNDLE_SIZE 8
115
116struct rsp_desc;
117
118struct sge_rspq { /* state for an SGE response queue */
119 unsigned int credits; /* # of pending response credits */
120 unsigned int size; /* capacity of response queue */
121 unsigned int cidx; /* consumer index */
122 unsigned int gen; /* current generation bit */
123 unsigned int polling; /* is the queue serviced through NAPI? */
124 unsigned int holdoff_tmr; /* interrupt holdoff timer in 100ns */
125 unsigned int next_holdoff; /* holdoff time for next interrupt */
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126 unsigned int rx_recycle_buf; /* whether recycling occurred
127 within current sop-eop */
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128 struct rsp_desc *desc; /* address of HW response ring */
129 dma_addr_t phys_addr; /* physical address of the ring */
130 unsigned int cntxt_id; /* SGE context id for the response q */
131 spinlock_t lock; /* guards response processing */
147e70e6 132 struct sk_buff_head rx_queue; /* offload packet receive queue */
7385ecf3 133 struct sk_buff *pg_skb; /* used to build frag list in napi handler */
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134
135 unsigned long offload_pkts;
136 unsigned long offload_bundles;
137 unsigned long eth_pkts; /* # of ethernet packets */
138 unsigned long pure_rsps; /* # of pure (non-data) responses */
139 unsigned long imm_data; /* responses with immediate data */
140 unsigned long rx_drops; /* # of packets dropped due to no mem */
141 unsigned long async_notif; /* # of asynchronous notification events */
142 unsigned long empty; /* # of times queue ran out of credits */
143 unsigned long nomem; /* # of responses deferred due to no mem */
144 unsigned long unhandled_irqs; /* # of spurious intrs */
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145 unsigned long starved;
146 unsigned long restarted;
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147};
148
149struct tx_desc;
150struct tx_sw_desc;
151
152struct sge_txq { /* state for an SGE Tx queue */
153 unsigned long flags; /* HW DMA fetch status */
154 unsigned int in_use; /* # of in-use Tx descriptors */
155 unsigned int size; /* # of descriptors */
156 unsigned int processed; /* total # of descs HW has processed */
157 unsigned int cleaned; /* total # of descs SW has reclaimed */
158 unsigned int stop_thres; /* SW TX queue suspend threshold */
159 unsigned int cidx; /* consumer index */
160 unsigned int pidx; /* producer index */
161 unsigned int gen; /* current value of generation bit */
162 unsigned int unacked; /* Tx descriptors used since last COMPL */
163 struct tx_desc *desc; /* address of HW Tx descriptor ring */
164 struct tx_sw_desc *sdesc; /* address of SW Tx descriptor ring */
165 spinlock_t lock; /* guards enqueueing of new packets */
166 unsigned int token; /* WR token */
167 dma_addr_t phys_addr; /* physical address of the ring */
168 struct sk_buff_head sendq; /* List of backpressured offload packets */
169 struct tasklet_struct qresume_tsk; /* restarts the queue */
170 unsigned int cntxt_id; /* SGE context id for the Tx q */
171 unsigned long stops; /* # of times q has been stopped */
172 unsigned long restarts; /* # of queue restarts */
173};
174
175enum { /* per port SGE statistics */
176 SGE_PSTAT_TSO, /* # of TSO requests */
177 SGE_PSTAT_RX_CSUM_GOOD, /* # of successful RX csum offloads */
178 SGE_PSTAT_TX_CSUM, /* # of TX checksum offloads */
179 SGE_PSTAT_VLANEX, /* # of VLAN tag extractions */
180 SGE_PSTAT_VLANINS, /* # of VLAN tag insertions */
181
182 SGE_PSTAT_MAX /* must be last */
183};
184
7be2df45 185struct napi_gro_fraginfo;
b47385bd 186
4d22de3e 187struct sge_qset { /* an SGE queue set */
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188 struct adapter *adap;
189 struct napi_struct napi;
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190 struct sge_rspq rspq;
191 struct sge_fl fl[SGE_RXQ_PER_SET];
192 struct sge_txq txq[SGE_TXQ_PER_SET];
7be2df45 193 struct napi_gro_fraginfo lro_frag_tbl;
b47385bd 194 int lro_enabled;
b47385bd 195 void *lro_va;
bea3348e 196 struct net_device *netdev;
82ad3329 197 struct netdev_queue *tx_q; /* associated netdev TX queue */
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198 unsigned long txq_stopped; /* which Tx queues are stopped */
199 struct timer_list tx_reclaim_timer; /* reclaims TX buffers */
200 unsigned long port_stats[SGE_PSTAT_MAX];
201} ____cacheline_aligned;
202
203struct sge {
204 struct sge_qset qs[SGE_QSETS];
205 spinlock_t reg_lock; /* guards non-atomic SGE registers (eg context) */
206};
207
208struct adapter {
209 struct t3cdev tdev;
210 struct list_head adapter_list;
211 void __iomem *regs;
212 struct pci_dev *pdev;
213 unsigned long registered_device_map;
214 unsigned long open_device_map;
215 unsigned long flags;
216
217 const char *name;
218 int msg_enable;
219 unsigned int mmio_len;
220
221 struct adapter_params params;
222 unsigned int slow_intr_mask;
223 unsigned long irq_stats[IRQ_NUM_STATS];
224
5cda9364 225 int msix_nvectors;
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226 struct {
227 unsigned short vec;
228 char desc[22];
229 } msix_info[SGE_QSETS + 1];
230
231 /* T3 modules */
232 struct sge sge;
233 struct mc7 pmrx;
234 struct mc7 pmtx;
235 struct mc7 cm;
236 struct mc5 mc5;
237
238 struct net_device *port[MAX_NPORTS];
239 unsigned int check_task_cnt;
240 struct delayed_work adap_check_task;
241 struct work_struct ext_intr_handler_task;
20d3fc11 242 struct work_struct fatal_error_handler_task;
4d22de3e 243
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244 struct dentry *debugfs_root;
245
246 struct mutex mdio_lock;
247 spinlock_t stats_lock;
248 spinlock_t work_lock;
249};
250
251static inline u32 t3_read_reg(struct adapter *adapter, u32 reg_addr)
252{
253 u32 val = readl(adapter->regs + reg_addr);
254
255 CH_DBG(adapter, MMIO, "read register 0x%x value 0x%x\n", reg_addr, val);
256 return val;
257}
258
259static inline void t3_write_reg(struct adapter *adapter, u32 reg_addr, u32 val)
260{
261 CH_DBG(adapter, MMIO, "setting register 0x%x to 0x%x\n", reg_addr, val);
262 writel(val, adapter->regs + reg_addr);
263}
264
265static inline struct port_info *adap2pinfo(struct adapter *adap, int idx)
266{
267 return netdev_priv(adap->port[idx]);
268}
269
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270#define OFFLOAD_DEVMAP_BIT 15
271
272#define tdev2adap(d) container_of(d, struct adapter, tdev)
273
274static inline int offload_running(struct adapter *adapter)
275{
276 return test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map);
277}
278
279int t3_offload_tx(struct t3cdev *tdev, struct sk_buff *skb);
280
281void t3_os_ext_intr_handler(struct adapter *adapter);
282void t3_os_link_changed(struct adapter *adapter, int port_id, int link_status,
283 int speed, int duplex, int fc);
04497982 284void t3_os_phymod_changed(struct adapter *adap, int port_id);
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285
286void t3_sge_start(struct adapter *adap);
287void t3_sge_stop(struct adapter *adap);
0ca41c04 288void t3_stop_sge_timers(struct adapter *adap);
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289void t3_free_sge_resources(struct adapter *adap);
290void t3_sge_err_intr_handler(struct adapter *adapter);
7c239975 291irq_handler_t t3_intr_handler(struct adapter *adap, int polling);
4d22de3e 292int t3_eth_xmit(struct sk_buff *skb, struct net_device *dev);
14ab9892 293int t3_mgmt_tx(struct adapter *adap, struct sk_buff *skb);
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294void t3_update_qset_coalesce(struct sge_qset *qs, const struct qset_params *p);
295int t3_sge_alloc_qset(struct adapter *adapter, unsigned int id, int nports,
296 int irq_vec_idx, const struct qset_params *p,
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297 int ntxq, struct net_device *dev,
298 struct netdev_queue *netdevq);
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299int t3_get_desc(const struct sge_qset *qs, unsigned int qnum, unsigned int idx,
300 unsigned char *data);
301irqreturn_t t3_sge_intr_msix(int irq, void *cookie);
302
303#endif /* __T3_ADAPTER_H__ */
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