1 /* QLogic qed NIC Driver
2  * Copyright (c) 2015-2017  QLogic Corporation
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 #ifndef _QED_SRIOV_H
34 #define _QED_SRIOV_H
35 #include <linux/types.h>
36 #include "qed_vf.h"
37 
38 #define QED_ETH_VF_NUM_MAC_FILTERS 1
39 #define QED_ETH_VF_NUM_VLAN_FILTERS 2
40 #define QED_VF_ARRAY_LENGTH (3)
41 
42 #ifdef CONFIG_QED_SRIOV
43 #define IS_VF(cdev)             ((cdev)->b_is_vf)
44 #define IS_PF(cdev)             (!((cdev)->b_is_vf))
45 #define IS_PF_SRIOV(p_hwfn)     (!!((p_hwfn)->cdev->p_iov_info))
46 #else
47 #define IS_VF(cdev)             (0)
48 #define IS_PF(cdev)             (1)
49 #define IS_PF_SRIOV(p_hwfn)     (0)
50 #endif
51 #define IS_PF_SRIOV_ALLOC(p_hwfn)       (!!((p_hwfn)->pf_iov_info))
52 
53 #define QED_MAX_VF_CHAINS_PER_PF 16
54 
55 #define QED_ETH_MAX_VF_NUM_VLAN_FILTERS	\
56 	(MAX_NUM_VFS * QED_ETH_VF_NUM_VLAN_FILTERS)
57 
58 enum qed_iov_vport_update_flag {
59 	QED_IOV_VP_UPDATE_ACTIVATE,
60 	QED_IOV_VP_UPDATE_VLAN_STRIP,
61 	QED_IOV_VP_UPDATE_TX_SWITCH,
62 	QED_IOV_VP_UPDATE_MCAST,
63 	QED_IOV_VP_UPDATE_ACCEPT_PARAM,
64 	QED_IOV_VP_UPDATE_RSS,
65 	QED_IOV_VP_UPDATE_ACCEPT_ANY_VLAN,
66 	QED_IOV_VP_UPDATE_SGE_TPA,
67 	QED_IOV_VP_UPDATE_MAX,
68 };
69 
70 struct qed_public_vf_info {
71 	/* These copies will later be reflected in the bulletin board,
72 	 * but this copy should be newer.
73 	 */
74 	u8 forced_mac[ETH_ALEN];
75 	u16 forced_vlan;
76 	u8 mac[ETH_ALEN];
77 
78 	/* IFLA_VF_LINK_STATE_<X> */
79 	int link_state;
80 
81 	/* Currently configured Tx rate in MB/sec. 0 if unconfigured */
82 	int tx_rate;
83 
84 	/* Trusted VFs can configure promiscuous mode.
85 	 * Also store shadow promisc configuration if needed.
86 	 */
87 	bool is_trusted_configured;
88 	bool is_trusted_request;
89 	u8 rx_accept_mode;
90 	u8 tx_accept_mode;
91 };
92 
93 struct qed_iov_vf_init_params {
94 	u16 rel_vf_id;
95 
96 	/* Number of requested Queues; Currently, don't support different
97 	 * number of Rx/Tx queues.
98 	 */
99 
100 	u16 num_queues;
101 
102 	/* Allow the client to choose which qzones to use for Rx/Tx,
103 	 * and which queue_base to use for Tx queues on a per-queue basis.
104 	 * Notice values should be relative to the PF resources.
105 	 */
106 	u16 req_rx_queue[QED_MAX_VF_CHAINS_PER_PF];
107 	u16 req_tx_queue[QED_MAX_VF_CHAINS_PER_PF];
108 };
109 
110 /* This struct is part of qed_dev and contains data relevant to all hwfns;
111  * Initialized only if SR-IOV cpabability is exposed in PCIe config space.
112  */
113 struct qed_hw_sriov_info {
114 	int pos;		/* capability position */
115 	int nres;		/* number of resources */
116 	u32 cap;		/* SR-IOV Capabilities */
117 	u16 ctrl;		/* SR-IOV Control */
118 	u16 total_vfs;		/* total VFs associated with the PF */
119 	u16 num_vfs;		/* number of vfs that have been started */
120 	u16 initial_vfs;	/* initial VFs associated with the PF */
121 	u16 nr_virtfn;		/* number of VFs available */
122 	u16 offset;		/* first VF Routing ID offset */
123 	u16 stride;		/* following VF stride */
124 	u16 vf_device_id;	/* VF device id */
125 	u32 pgsz;		/* page size for BAR alignment */
126 	u8 link;		/* Function Dependency Link */
127 
128 	u32 first_vf_in_pf;
129 };
130 
131 /* This mailbox is maintained per VF in its PF contains all information
132  * required for sending / receiving a message.
133  */
134 struct qed_iov_vf_mbx {
135 	union vfpf_tlvs *req_virt;
136 	dma_addr_t req_phys;
137 	union pfvf_tlvs *reply_virt;
138 	dma_addr_t reply_phys;
139 
140 	/* Address in VF where a pending message is located */
141 	dma_addr_t pending_req;
142 
143 	/* Message from VF awaits handling */
144 	bool b_pending_msg;
145 
146 	u8 *offset;
147 
148 	/* saved VF request header */
149 	struct vfpf_first_tlv first_tlv;
150 };
151 
152 #define QED_IOV_LEGACY_QID_RX (0)
153 #define QED_IOV_LEGACY_QID_TX (1)
154 #define QED_IOV_QID_INVALID (0xFE)
155 
156 struct qed_vf_queue_cid {
157 	bool b_is_tx;
158 	struct qed_queue_cid *p_cid;
159 };
160 
161 /* Describes a qzone associated with the VF */
162 struct qed_vf_queue {
163 	u16 fw_rx_qid;
164 	u16 fw_tx_qid;
165 
166 	struct qed_vf_queue_cid cids[MAX_QUEUES_PER_QZONE];
167 };
168 
169 enum vf_state {
170 	VF_FREE = 0,		/* VF ready to be acquired holds no resc */
171 	VF_ACQUIRED,		/* VF, acquired, but not initalized */
172 	VF_ENABLED,		/* VF, Enabled */
173 	VF_RESET,		/* VF, FLR'd, pending cleanup */
174 	VF_STOPPED		/* VF, Stopped */
175 };
176 
177 struct qed_vf_vlan_shadow {
178 	bool used;
179 	u16 vid;
180 };
181 
182 struct qed_vf_shadow_config {
183 	/* Shadow copy of all guest vlans */
184 	struct qed_vf_vlan_shadow vlans[QED_ETH_VF_NUM_VLAN_FILTERS + 1];
185 
186 	/* Shadow copy of all configured MACs; Empty if forcing MACs */
187 	u8 macs[QED_ETH_VF_NUM_MAC_FILTERS][ETH_ALEN];
188 	u8 inner_vlan_removal;
189 };
190 
191 /* PFs maintain an array of this structure, per VF */
192 struct qed_vf_info {
193 	struct qed_iov_vf_mbx vf_mbx;
194 	enum vf_state state;
195 	bool b_init;
196 	bool b_malicious;
197 	u8 to_disable;
198 
199 	struct qed_bulletin bulletin;
200 	dma_addr_t vf_bulletin;
201 
202 	/* PF saves a copy of the last VF acquire message */
203 	struct vfpf_acquire_tlv acquire;
204 
205 	u32 concrete_fid;
206 	u16 opaque_fid;
207 	u16 mtu;
208 
209 	u8 vport_id;
210 	u8 relative_vf_id;
211 	u8 abs_vf_id;
212 #define QED_VF_ABS_ID(p_hwfn, p_vf)	(QED_PATH_ID(p_hwfn) ?		      \
213 					 (p_vf)->abs_vf_id + MAX_NUM_VFS_BB : \
214 					 (p_vf)->abs_vf_id)
215 
216 	u8 vport_instance;
217 	u8 num_rxqs;
218 	u8 num_txqs;
219 
220 	u8 num_sbs;
221 
222 	u8 num_mac_filters;
223 	u8 num_vlan_filters;
224 
225 	struct qed_vf_queue vf_queues[QED_MAX_VF_CHAINS_PER_PF];
226 	u16 igu_sbs[QED_MAX_VF_CHAINS_PER_PF];
227 	u8 num_active_rxqs;
228 	struct qed_public_vf_info p_vf_info;
229 	bool spoof_chk;
230 	bool req_spoofchk_val;
231 
232 	/* Stores the configuration requested by VF */
233 	struct qed_vf_shadow_config shadow_config;
234 
235 	/* A bitfield using bulletin's valid-map bits, used to indicate
236 	 * which of the bulletin board features have been configured.
237 	 */
238 	u64 configured_features;
239 #define QED_IOV_CONFIGURED_FEATURES_MASK        ((1 << MAC_ADDR_FORCED) | \
240 						 (1 << VLAN_ADDR_FORCED))
241 };
242 
243 /* This structure is part of qed_hwfn and used only for PFs that have sriov
244  * capability enabled.
245  */
246 struct qed_pf_iov {
247 	struct qed_vf_info vfs_array[MAX_NUM_VFS];
248 	u64 pending_flr[QED_VF_ARRAY_LENGTH];
249 
250 	/* Allocate message address continuosuly and split to each VF */
251 	void *mbx_msg_virt_addr;
252 	dma_addr_t mbx_msg_phys_addr;
253 	u32 mbx_msg_size;
254 	void *mbx_reply_virt_addr;
255 	dma_addr_t mbx_reply_phys_addr;
256 	u32 mbx_reply_size;
257 	void *p_bulletins;
258 	dma_addr_t bulletins_phys;
259 	u32 bulletins_size;
260 };
261 
262 enum qed_iov_wq_flag {
263 	QED_IOV_WQ_MSG_FLAG,
264 	QED_IOV_WQ_SET_UNICAST_FILTER_FLAG,
265 	QED_IOV_WQ_BULLETIN_UPDATE_FLAG,
266 	QED_IOV_WQ_STOP_WQ_FLAG,
267 	QED_IOV_WQ_FLR_FLAG,
268 	QED_IOV_WQ_TRUST_FLAG,
269 	QED_IOV_WQ_VF_FORCE_LINK_QUERY_FLAG,
270 };
271 
272 #ifdef CONFIG_QED_SRIOV
273 /**
274  * @brief - Given a VF index, return index of next [including that] active VF.
275  *
276  * @param p_hwfn
277  * @param rel_vf_id
278  *
279  * @return MAX_NUM_VFS in case no further active VFs, otherwise index.
280  */
281 u16 qed_iov_get_next_active_vf(struct qed_hwfn *p_hwfn, u16 rel_vf_id);
282 
283 void qed_iov_bulletin_set_udp_ports(struct qed_hwfn *p_hwfn,
284 				    int vfid, u16 vxlan_port, u16 geneve_port);
285 
286 /**
287  * @brief Read sriov related information and allocated resources
288  *  reads from configuraiton space, shmem, etc.
289  *
290  * @param p_hwfn
291  *
292  * @return int
293  */
294 int qed_iov_hw_info(struct qed_hwfn *p_hwfn);
295 
296 /**
297  * @brief qed_add_tlv - place a given tlv on the tlv buffer at next offset
298  *
299  * @param p_hwfn
300  * @param p_iov
301  * @param type
302  * @param length
303  *
304  * @return pointer to the newly placed tlv
305  */
306 void *qed_add_tlv(struct qed_hwfn *p_hwfn, u8 **offset, u16 type, u16 length);
307 
308 /**
309  * @brief list the types and lengths of the tlvs on the buffer
310  *
311  * @param p_hwfn
312  * @param tlvs_list
313  */
314 void qed_dp_tlv_list(struct qed_hwfn *p_hwfn, void *tlvs_list);
315 
316 /**
317  * @brief qed_iov_alloc - allocate sriov related resources
318  *
319  * @param p_hwfn
320  *
321  * @return int
322  */
323 int qed_iov_alloc(struct qed_hwfn *p_hwfn);
324 
325 /**
326  * @brief qed_iov_setup - setup sriov related resources
327  *
328  * @param p_hwfn
329  */
330 void qed_iov_setup(struct qed_hwfn *p_hwfn);
331 
332 /**
333  * @brief qed_iov_free - free sriov related resources
334  *
335  * @param p_hwfn
336  */
337 void qed_iov_free(struct qed_hwfn *p_hwfn);
338 
339 /**
340  * @brief free sriov related memory that was allocated during hw_prepare
341  *
342  * @param cdev
343  */
344 void qed_iov_free_hw_info(struct qed_dev *cdev);
345 
346 /**
347  * @brief Mark structs of vfs that have been FLR-ed.
348  *
349  * @param p_hwfn
350  * @param disabled_vfs - bitmask of all VFs on path that were FLRed
351  *
352  * @return true iff one of the PF's vfs got FLRed. false otherwise.
353  */
354 bool qed_iov_mark_vf_flr(struct qed_hwfn *p_hwfn, u32 *disabled_vfs);
355 
356 /**
357  * @brief Search extended TLVs in request/reply buffer.
358  *
359  * @param p_hwfn
360  * @param p_tlvs_list - Pointer to tlvs list
361  * @param req_type - Type of TLV
362  *
363  * @return pointer to tlv type if found, otherwise returns NULL.
364  */
365 void *qed_iov_search_list_tlvs(struct qed_hwfn *p_hwfn,
366 			       void *p_tlvs_list, u16 req_type);
367 
368 void qed_iov_wq_stop(struct qed_dev *cdev, bool schedule_first);
369 int qed_iov_wq_start(struct qed_dev *cdev);
370 
371 void qed_schedule_iov(struct qed_hwfn *hwfn, enum qed_iov_wq_flag flag);
372 void qed_vf_start_iov_wq(struct qed_dev *cdev);
373 int qed_sriov_disable(struct qed_dev *cdev, bool pci_enabled);
374 void qed_inform_vf_link_state(struct qed_hwfn *hwfn);
375 #else
376 static inline u16 qed_iov_get_next_active_vf(struct qed_hwfn *p_hwfn,
377 					     u16 rel_vf_id)
378 {
379 	return MAX_NUM_VFS;
380 }
381 
382 static inline void
383 qed_iov_bulletin_set_udp_ports(struct qed_hwfn *p_hwfn, int vfid,
384 			       u16 vxlan_port, u16 geneve_port)
385 {
386 }
387 
388 static inline int qed_iov_hw_info(struct qed_hwfn *p_hwfn)
389 {
390 	return 0;
391 }
392 
393 static inline int qed_iov_alloc(struct qed_hwfn *p_hwfn)
394 {
395 	return 0;
396 }
397 
398 static inline void qed_iov_setup(struct qed_hwfn *p_hwfn)
399 {
400 }
401 
402 static inline void qed_iov_free(struct qed_hwfn *p_hwfn)
403 {
404 }
405 
406 static inline void qed_iov_free_hw_info(struct qed_dev *cdev)
407 {
408 }
409 
410 static inline bool qed_iov_mark_vf_flr(struct qed_hwfn *p_hwfn,
411 				       u32 *disabled_vfs)
412 {
413 	return false;
414 }
415 
416 static inline void qed_iov_wq_stop(struct qed_dev *cdev, bool schedule_first)
417 {
418 }
419 
420 static inline int qed_iov_wq_start(struct qed_dev *cdev)
421 {
422 	return 0;
423 }
424 
425 static inline void qed_schedule_iov(struct qed_hwfn *hwfn,
426 				    enum qed_iov_wq_flag flag)
427 {
428 }
429 
430 static inline void qed_vf_start_iov_wq(struct qed_dev *cdev)
431 {
432 }
433 
434 static inline int qed_sriov_disable(struct qed_dev *cdev, bool pci_enabled)
435 {
436 	return 0;
437 }
438 
439 static inline void qed_inform_vf_link_state(struct qed_hwfn *hwfn)
440 {
441 }
442 #endif
443 
444 #define qed_for_each_vf(_p_hwfn, _i)			  \
445 	for (_i = qed_iov_get_next_active_vf(_p_hwfn, 0); \
446 	     _i < MAX_NUM_VFS;				  \
447 	     _i = qed_iov_get_next_active_vf(_p_hwfn, _i + 1))
448 
449 #endif
450