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
48 struct vlan_group;
49 struct adapter;
50 struct sge_qset;
51 struct port_info;
52
53 enum { /* rx_offload flags */
54 T3_RX_CSUM = 1 << 0,
55 T3_LRO = 1 << 1,
56 };
57
58 enum mac_idx_types {
59 LAN_MAC_IDX = 0,
60 SAN_MAC_IDX,
61
62 MAX_MAC_IDX
63 };
64
65 struct 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
72 struct 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
91 enum { /* 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
100 struct 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
108 struct rx_desc;
109 struct rx_sw_desc;
110
111 struct 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
137 struct rsp_desc;
138
139 struct 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
170 struct tx_desc;
171 struct tx_sw_desc;
172
173 struct 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
196 enum { /* 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
206 struct napi_gro_fraginfo;
207
208 struct 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
225 struct sge {
226 struct sge_qset qs[SGE_QSETS];
227 spinlock_t reg_lock; /* guards non-atomic SGE registers (eg context) */
228 };
229
230 struct 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
t3_read_reg(struct adapter * adapter,u32 reg_addr)280 static 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
t3_write_reg(struct adapter * adapter,u32 reg_addr,u32 val)288 static 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
adap2pinfo(struct adapter * adap,int idx)294 static inline struct port_info *adap2pinfo(struct adapter *adap, int idx)
295 {
296 return netdev_priv(adap->port[idx]);
297 }
298
phy2portid(struct cphy * phy)299 static 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
offload_running(struct adapter * adapter)311 static inline int offload_running(struct adapter *adapter)
312 {
313 return test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map);
314 }
315
316 int t3_offload_tx(struct t3cdev *tdev, struct sk_buff *skb);
317
318 void t3_os_ext_intr_handler(struct adapter *adapter);
319 void t3_os_link_changed(struct adapter *adapter, int port_id, int link_status,
320 int speed, int duplex, int fc);
321 void t3_os_phymod_changed(struct adapter *adap, int port_id);
322 void t3_os_link_fault(struct adapter *adapter, int port_id, int state);
323 void t3_os_link_fault_handler(struct adapter *adapter, int port_id);
324
325 void t3_sge_start(struct adapter *adap);
326 void t3_sge_stop(struct adapter *adap);
327 void t3_start_sge_timers(struct adapter *adap);
328 void t3_stop_sge_timers(struct adapter *adap);
329 void t3_free_sge_resources(struct adapter *adap);
330 void t3_sge_err_intr_handler(struct adapter *adapter);
331 irq_handler_t t3_intr_handler(struct adapter *adap, int polling);
332 netdev_tx_t t3_eth_xmit(struct sk_buff *skb, struct net_device *dev);
333 int t3_mgmt_tx(struct adapter *adap, struct sk_buff *skb);
334 void t3_update_qset_coalesce(struct sge_qset *qs, const struct qset_params *p);
335 int 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);
339 extern struct workqueue_struct *cxgb3_wq;
340
341 int t3_get_edc_fw(struct cphy *phy, int edc_idx, int size);
342
343 #endif /* __T3_ADAPTER_H__ */
344