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 adapter;
49 struct sge_qset;
50 struct port_info;
51
52 enum mac_idx_types {
53 LAN_MAC_IDX = 0,
54 SAN_MAC_IDX,
55
56 MAX_MAC_IDX
57 };
58
59 struct iscsi_config {
60 __u8 mac_addr[ETH_ALEN];
61 __u32 flags;
62 int (*send)(struct port_info *pi, struct sk_buff **skb);
63 int (*recv)(struct port_info *pi, struct sk_buff *skb);
64 };
65
66 struct port_info {
67 struct adapter *adapter;
68 struct sge_qset *qs;
69 u8 port_id;
70 u8 nqsets;
71 u8 first_qset;
72 struct cphy phy;
73 struct cmac mac;
74 struct link_config link_config;
75 int activity;
76 __be32 iscsi_ipv4addr;
77 struct iscsi_config iscsic;
78
79 int link_fault; /* link fault was detected */
80 };
81
82 enum { /* adapter flags */
83 FULL_INIT_DONE = (1 << 0),
84 USING_MSI = (1 << 1),
85 USING_MSIX = (1 << 2),
86 QUEUES_BOUND = (1 << 3),
87 TP_PARITY_INIT = (1 << 4),
88 NAPI_INIT = (1 << 5),
89 };
90
91 struct fl_pg_chunk {
92 struct page *page;
93 void *va;
94 unsigned int offset;
95 unsigned long *p_cnt;
96 dma_addr_t mapping;
97 };
98
99 struct rx_desc;
100 struct rx_sw_desc;
101
102 struct sge_fl { /* SGE per free-buffer list state */
103 unsigned int buf_size; /* size of each Rx buffer */
104 unsigned int credits; /* # of available Rx buffers */
105 unsigned int pend_cred; /* new buffers since last FL DB ring */
106 unsigned int size; /* capacity of free list */
107 unsigned int cidx; /* consumer index */
108 unsigned int pidx; /* producer index */
109 unsigned int gen; /* free list generation */
110 struct fl_pg_chunk pg_chunk;/* page chunk cache */
111 unsigned int use_pages; /* whether FL uses pages or sk_buffs */
112 unsigned int order; /* order of page allocations */
113 unsigned int alloc_size; /* size of allocated buffer */
114 struct rx_desc *desc; /* address of HW Rx descriptor ring */
115 struct rx_sw_desc *sdesc; /* address of SW Rx descriptor ring */
116 dma_addr_t phys_addr; /* physical address of HW ring start */
117 unsigned int cntxt_id; /* SGE context id for the free list */
118 unsigned long empty; /* # of times queue ran out of buffers */
119 unsigned long alloc_failed; /* # of times buffer allocation failed */
120 };
121
122 /*
123 * Bundle size for grouping offload RX packets for delivery to the stack.
124 * Don't make this too big as we do prefetch on each packet in a bundle.
125 */
126 # define RX_BUNDLE_SIZE 8
127
128 struct rsp_desc;
129
130 struct sge_rspq { /* state for an SGE response queue */
131 unsigned int credits; /* # of pending response credits */
132 unsigned int size; /* capacity of response queue */
133 unsigned int cidx; /* consumer index */
134 unsigned int gen; /* current generation bit */
135 unsigned int polling; /* is the queue serviced through NAPI? */
136 unsigned int holdoff_tmr; /* interrupt holdoff timer in 100ns */
137 unsigned int next_holdoff; /* holdoff time for next interrupt */
138 unsigned int rx_recycle_buf; /* whether recycling occurred
139 within current sop-eop */
140 struct rsp_desc *desc; /* address of HW response ring */
141 dma_addr_t phys_addr; /* physical address of the ring */
142 unsigned int cntxt_id; /* SGE context id for the response q */
143 spinlock_t lock; /* guards response processing */
144 struct sk_buff_head rx_queue; /* offload packet receive queue */
145 struct sk_buff *pg_skb; /* used to build frag list in napi handler */
146
147 unsigned long offload_pkts;
148 unsigned long offload_bundles;
149 unsigned long eth_pkts; /* # of ethernet packets */
150 unsigned long pure_rsps; /* # of pure (non-data) responses */
151 unsigned long imm_data; /* responses with immediate data */
152 unsigned long rx_drops; /* # of packets dropped due to no mem */
153 unsigned long async_notif; /* # of asynchronous notification events */
154 unsigned long empty; /* # of times queue ran out of credits */
155 unsigned long nomem; /* # of responses deferred due to no mem */
156 unsigned long unhandled_irqs; /* # of spurious intrs */
157 unsigned long starved;
158 unsigned long restarted;
159 };
160
161 struct tx_desc;
162 struct tx_sw_desc;
163
164 struct sge_txq { /* state for an SGE Tx queue */
165 unsigned long flags; /* HW DMA fetch status */
166 unsigned int in_use; /* # of in-use Tx descriptors */
167 unsigned int size; /* # of descriptors */
168 unsigned int processed; /* total # of descs HW has processed */
169 unsigned int cleaned; /* total # of descs SW has reclaimed */
170 unsigned int stop_thres; /* SW TX queue suspend threshold */
171 unsigned int cidx; /* consumer index */
172 unsigned int pidx; /* producer index */
173 unsigned int gen; /* current value of generation bit */
174 unsigned int unacked; /* Tx descriptors used since last COMPL */
175 struct tx_desc *desc; /* address of HW Tx descriptor ring */
176 struct tx_sw_desc *sdesc; /* address of SW Tx descriptor ring */
177 spinlock_t lock; /* guards enqueueing of new packets */
178 unsigned int token; /* WR token */
179 dma_addr_t phys_addr; /* physical address of the ring */
180 struct sk_buff_head sendq; /* List of backpressured offload packets */
181 struct tasklet_struct qresume_tsk; /* restarts the queue */
182 unsigned int cntxt_id; /* SGE context id for the Tx q */
183 unsigned long stops; /* # of times q has been stopped */
184 unsigned long restarts; /* # of queue restarts */
185 };
186
187 enum { /* per port SGE statistics */
188 SGE_PSTAT_TSO, /* # of TSO requests */
189 SGE_PSTAT_RX_CSUM_GOOD, /* # of successful RX csum offloads */
190 SGE_PSTAT_TX_CSUM, /* # of TX checksum offloads */
191 SGE_PSTAT_VLANEX, /* # of VLAN tag extractions */
192 SGE_PSTAT_VLANINS, /* # of VLAN tag insertions */
193
194 SGE_PSTAT_MAX /* must be last */
195 };
196
197 struct napi_gro_fraginfo;
198
199 struct sge_qset { /* an SGE queue set */
200 struct adapter *adap;
201 struct napi_struct napi;
202 struct sge_rspq rspq;
203 struct sge_fl fl[SGE_RXQ_PER_SET];
204 struct sge_txq txq[SGE_TXQ_PER_SET];
205 int nomem;
206 void *lro_va;
207 struct net_device *netdev;
208 struct netdev_queue *tx_q; /* associated netdev TX queue */
209 unsigned long txq_stopped; /* which Tx queues are stopped */
210 struct timer_list tx_reclaim_timer; /* reclaims TX buffers */
211 struct timer_list rx_reclaim_timer; /* reclaims RX buffers */
212 unsigned long port_stats[SGE_PSTAT_MAX];
213 } ____cacheline_aligned;
214
215 struct sge {
216 struct sge_qset qs[SGE_QSETS];
217 spinlock_t reg_lock; /* guards non-atomic SGE registers (eg context) */
218 };
219
220 struct adapter {
221 struct t3cdev tdev;
222 struct list_head adapter_list;
223 void __iomem *regs;
224 struct pci_dev *pdev;
225 unsigned long registered_device_map;
226 unsigned long open_device_map;
227 unsigned long flags;
228
229 const char *name;
230 int msg_enable;
231 unsigned int mmio_len;
232
233 struct adapter_params params;
234 unsigned int slow_intr_mask;
235 unsigned long irq_stats[IRQ_NUM_STATS];
236
237 int msix_nvectors;
238 struct {
239 unsigned short vec;
240 char desc[22];
241 } msix_info[SGE_QSETS + 1];
242
243 /* T3 modules */
244 struct sge sge;
245 struct mc7 pmrx;
246 struct mc7 pmtx;
247 struct mc7 cm;
248 struct mc5 mc5;
249
250 struct net_device *port[MAX_NPORTS];
251 unsigned int check_task_cnt;
252 struct delayed_work adap_check_task;
253 struct work_struct ext_intr_handler_task;
254 struct work_struct fatal_error_handler_task;
255 struct work_struct link_fault_handler_task;
256
257 struct work_struct db_full_task;
258 struct work_struct db_empty_task;
259 struct work_struct db_drop_task;
260
261 struct dentry *debugfs_root;
262
263 struct mutex mdio_lock;
264 spinlock_t stats_lock;
265 spinlock_t work_lock;
266
267 struct sk_buff *nofail_skb;
268 };
269
t3_read_reg(struct adapter * adapter,u32 reg_addr)270 static inline u32 t3_read_reg(struct adapter *adapter, u32 reg_addr)
271 {
272 u32 val = readl(adapter->regs + reg_addr);
273
274 CH_DBG(adapter, MMIO, "read register 0x%x value 0x%x\n", reg_addr, val);
275 return val;
276 }
277
t3_write_reg(struct adapter * adapter,u32 reg_addr,u32 val)278 static inline void t3_write_reg(struct adapter *adapter, u32 reg_addr, u32 val)
279 {
280 CH_DBG(adapter, MMIO, "setting register 0x%x to 0x%x\n", reg_addr, val);
281 writel(val, adapter->regs + reg_addr);
282 }
283
adap2pinfo(struct adapter * adap,int idx)284 static inline struct port_info *adap2pinfo(struct adapter *adap, int idx)
285 {
286 return netdev_priv(adap->port[idx]);
287 }
288
phy2portid(struct cphy * phy)289 static inline int phy2portid(struct cphy *phy)
290 {
291 struct adapter *adap = phy->adapter;
292 struct port_info *port0 = adap2pinfo(adap, 0);
293
294 return &port0->phy == phy ? 0 : 1;
295 }
296
297 #define OFFLOAD_DEVMAP_BIT 15
298
299 #define tdev2adap(d) container_of(d, struct adapter, tdev)
300
offload_running(struct adapter * adapter)301 static inline int offload_running(struct adapter *adapter)
302 {
303 return test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map);
304 }
305
306 int t3_offload_tx(struct t3cdev *tdev, struct sk_buff *skb);
307
308 void t3_os_ext_intr_handler(struct adapter *adapter);
309 void t3_os_link_changed(struct adapter *adapter, int port_id, int link_status,
310 int speed, int duplex, int fc);
311 void t3_os_phymod_changed(struct adapter *adap, int port_id);
312 void t3_os_link_fault(struct adapter *adapter, int port_id, int state);
313 void t3_os_link_fault_handler(struct adapter *adapter, int port_id);
314
315 void t3_sge_start(struct adapter *adap);
316 void t3_sge_stop_dma(struct adapter *adap);
317 void t3_sge_stop(struct adapter *adap);
318 void t3_start_sge_timers(struct adapter *adap);
319 void t3_stop_sge_timers(struct adapter *adap);
320 void t3_free_sge_resources(struct adapter *adap);
321 void t3_sge_err_intr_handler(struct adapter *adapter);
322 irq_handler_t t3_intr_handler(struct adapter *adap, int polling);
323 netdev_tx_t t3_eth_xmit(struct sk_buff *skb, struct net_device *dev);
324 int t3_mgmt_tx(struct adapter *adap, struct sk_buff *skb);
325 void t3_update_qset_coalesce(struct sge_qset *qs, const struct qset_params *p);
326 int t3_sge_alloc_qset(struct adapter *adapter, unsigned int id, int nports,
327 int irq_vec_idx, const struct qset_params *p,
328 int ntxq, struct net_device *dev,
329 struct netdev_queue *netdevq);
330 extern struct workqueue_struct *cxgb3_wq;
331
332 int t3_get_edc_fw(struct cphy *phy, int edc_idx, int size);
333
334 #endif /* __T3_ADAPTER_H__ */
335