1 /*
2  * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
3  * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved.
4  * Copyright (c) 2005, 2006, 2007 Cisco Systems, Inc.  All rights reserved.
5  *
6  * This software is available to you under a choice of one of two
7  * licenses.  You may choose to be licensed under the terms of the GNU
8  * General Public License (GPL) Version 2, available from the file
9  * COPYING in the main directory of this source tree, or the
10  * OpenIB.org BSD license below:
11  *
12  *     Redistribution and use in source and binary forms, with or
13  *     without modification, are permitted provided that the following
14  *     conditions are met:
15  *
16  *      - Redistributions of source code must retain the above
17  *        copyright notice, this list of conditions and the following
18  *        disclaimer.
19  *
20  *      - Redistributions in binary form must reproduce the above
21  *        copyright notice, this list of conditions and the following
22  *        disclaimer in the documentation and/or other materials
23  *        provided with the distribution.
24  *
25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32  * SOFTWARE.
33  */
34 
35 #include <linux/sched.h>
36 #include <linux/slab.h>
37 #include <linux/export.h>
38 #include <linux/pci.h>
39 #include <linux/errno.h>
40 
41 #include <linux/mlx4/cmd.h>
42 #include <linux/mlx4/device.h>
43 #include <linux/semaphore.h>
44 #include <rdma/ib_smi.h>
45 #include <linux/delay.h>
46 #include <linux/etherdevice.h>
47 
48 #include <asm/io.h>
49 
50 #include "mlx4.h"
51 #include "fw.h"
52 #include "fw_qos.h"
53 #include "mlx4_stats.h"
54 
55 #define CMD_POLL_TOKEN 0xffff
56 #define INBOX_MASK	0xffffffffffffff00ULL
57 
58 #define CMD_CHAN_VER 1
59 #define CMD_CHAN_IF_REV 1
60 
61 enum {
62 	/* command completed successfully: */
63 	CMD_STAT_OK		= 0x00,
64 	/* Internal error (such as a bus error) occurred while processing command: */
65 	CMD_STAT_INTERNAL_ERR	= 0x01,
66 	/* Operation/command not supported or opcode modifier not supported: */
67 	CMD_STAT_BAD_OP		= 0x02,
68 	/* Parameter not supported or parameter out of range: */
69 	CMD_STAT_BAD_PARAM	= 0x03,
70 	/* System not enabled or bad system state: */
71 	CMD_STAT_BAD_SYS_STATE	= 0x04,
72 	/* Attempt to access reserved or unallocaterd resource: */
73 	CMD_STAT_BAD_RESOURCE	= 0x05,
74 	/* Requested resource is currently executing a command, or is otherwise busy: */
75 	CMD_STAT_RESOURCE_BUSY	= 0x06,
76 	/* Required capability exceeds device limits: */
77 	CMD_STAT_EXCEED_LIM	= 0x08,
78 	/* Resource is not in the appropriate state or ownership: */
79 	CMD_STAT_BAD_RES_STATE	= 0x09,
80 	/* Index out of range: */
81 	CMD_STAT_BAD_INDEX	= 0x0a,
82 	/* FW image corrupted: */
83 	CMD_STAT_BAD_NVMEM	= 0x0b,
84 	/* Error in ICM mapping (e.g. not enough auxiliary ICM pages to execute command): */
85 	CMD_STAT_ICM_ERROR	= 0x0c,
86 	/* Attempt to modify a QP/EE which is not in the presumed state: */
87 	CMD_STAT_BAD_QP_STATE   = 0x10,
88 	/* Bad segment parameters (Address/Size): */
89 	CMD_STAT_BAD_SEG_PARAM	= 0x20,
90 	/* Memory Region has Memory Windows bound to: */
91 	CMD_STAT_REG_BOUND	= 0x21,
92 	/* HCA local attached memory not present: */
93 	CMD_STAT_LAM_NOT_PRE	= 0x22,
94 	/* Bad management packet (silently discarded): */
95 	CMD_STAT_BAD_PKT	= 0x30,
96 	/* More outstanding CQEs in CQ than new CQ size: */
97 	CMD_STAT_BAD_SIZE	= 0x40,
98 	/* Multi Function device support required: */
99 	CMD_STAT_MULTI_FUNC_REQ	= 0x50,
100 };
101 
102 enum {
103 	HCR_IN_PARAM_OFFSET	= 0x00,
104 	HCR_IN_MODIFIER_OFFSET	= 0x08,
105 	HCR_OUT_PARAM_OFFSET	= 0x0c,
106 	HCR_TOKEN_OFFSET	= 0x14,
107 	HCR_STATUS_OFFSET	= 0x18,
108 
109 	HCR_OPMOD_SHIFT		= 12,
110 	HCR_T_BIT		= 21,
111 	HCR_E_BIT		= 22,
112 	HCR_GO_BIT		= 23
113 };
114 
115 enum {
116 	GO_BIT_TIMEOUT_MSECS	= 10000
117 };
118 
119 enum mlx4_vlan_transition {
120 	MLX4_VLAN_TRANSITION_VST_VST = 0,
121 	MLX4_VLAN_TRANSITION_VST_VGT = 1,
122 	MLX4_VLAN_TRANSITION_VGT_VST = 2,
123 	MLX4_VLAN_TRANSITION_VGT_VGT = 3,
124 };
125 
126 
127 struct mlx4_cmd_context {
128 	struct completion	done;
129 	int			result;
130 	int			next;
131 	u64			out_param;
132 	u16			token;
133 	u8			fw_status;
134 };
135 
136 static int mlx4_master_process_vhcr(struct mlx4_dev *dev, int slave,
137 				    struct mlx4_vhcr_cmd *in_vhcr);
138 
139 static int mlx4_status_to_errno(u8 status)
140 {
141 	static const int trans_table[] = {
142 		[CMD_STAT_INTERNAL_ERR]	  = -EIO,
143 		[CMD_STAT_BAD_OP]	  = -EPERM,
144 		[CMD_STAT_BAD_PARAM]	  = -EINVAL,
145 		[CMD_STAT_BAD_SYS_STATE]  = -ENXIO,
146 		[CMD_STAT_BAD_RESOURCE]	  = -EBADF,
147 		[CMD_STAT_RESOURCE_BUSY]  = -EBUSY,
148 		[CMD_STAT_EXCEED_LIM]	  = -ENOMEM,
149 		[CMD_STAT_BAD_RES_STATE]  = -EBADF,
150 		[CMD_STAT_BAD_INDEX]	  = -EBADF,
151 		[CMD_STAT_BAD_NVMEM]	  = -EFAULT,
152 		[CMD_STAT_ICM_ERROR]	  = -ENFILE,
153 		[CMD_STAT_BAD_QP_STATE]   = -EINVAL,
154 		[CMD_STAT_BAD_SEG_PARAM]  = -EFAULT,
155 		[CMD_STAT_REG_BOUND]	  = -EBUSY,
156 		[CMD_STAT_LAM_NOT_PRE]	  = -EAGAIN,
157 		[CMD_STAT_BAD_PKT]	  = -EINVAL,
158 		[CMD_STAT_BAD_SIZE]	  = -ENOMEM,
159 		[CMD_STAT_MULTI_FUNC_REQ] = -EACCES,
160 	};
161 
162 	if (status >= ARRAY_SIZE(trans_table) ||
163 	    (status != CMD_STAT_OK && trans_table[status] == 0))
164 		return -EIO;
165 
166 	return trans_table[status];
167 }
168 
169 static u8 mlx4_errno_to_status(int errno)
170 {
171 	switch (errno) {
172 	case -EPERM:
173 		return CMD_STAT_BAD_OP;
174 	case -EINVAL:
175 		return CMD_STAT_BAD_PARAM;
176 	case -ENXIO:
177 		return CMD_STAT_BAD_SYS_STATE;
178 	case -EBUSY:
179 		return CMD_STAT_RESOURCE_BUSY;
180 	case -ENOMEM:
181 		return CMD_STAT_EXCEED_LIM;
182 	case -ENFILE:
183 		return CMD_STAT_ICM_ERROR;
184 	default:
185 		return CMD_STAT_INTERNAL_ERR;
186 	}
187 }
188 
189 static int mlx4_internal_err_ret_value(struct mlx4_dev *dev, u16 op,
190 				       u8 op_modifier)
191 {
192 	switch (op) {
193 	case MLX4_CMD_UNMAP_ICM:
194 	case MLX4_CMD_UNMAP_ICM_AUX:
195 	case MLX4_CMD_UNMAP_FA:
196 	case MLX4_CMD_2RST_QP:
197 	case MLX4_CMD_HW2SW_EQ:
198 	case MLX4_CMD_HW2SW_CQ:
199 	case MLX4_CMD_HW2SW_SRQ:
200 	case MLX4_CMD_HW2SW_MPT:
201 	case MLX4_CMD_CLOSE_HCA:
202 	case MLX4_QP_FLOW_STEERING_DETACH:
203 	case MLX4_CMD_FREE_RES:
204 	case MLX4_CMD_CLOSE_PORT:
205 		return CMD_STAT_OK;
206 
207 	case MLX4_CMD_QP_ATTACH:
208 		/* On Detach case return success */
209 		if (op_modifier == 0)
210 			return CMD_STAT_OK;
211 		return mlx4_status_to_errno(CMD_STAT_INTERNAL_ERR);
212 
213 	default:
214 		return mlx4_status_to_errno(CMD_STAT_INTERNAL_ERR);
215 	}
216 }
217 
218 static int mlx4_closing_cmd_fatal_error(u16 op, u8 fw_status)
219 {
220 	/* Any error during the closing commands below is considered fatal */
221 	if (op == MLX4_CMD_CLOSE_HCA ||
222 	    op == MLX4_CMD_HW2SW_EQ ||
223 	    op == MLX4_CMD_HW2SW_CQ ||
224 	    op == MLX4_CMD_2RST_QP ||
225 	    op == MLX4_CMD_HW2SW_SRQ ||
226 	    op == MLX4_CMD_SYNC_TPT ||
227 	    op == MLX4_CMD_UNMAP_ICM ||
228 	    op == MLX4_CMD_UNMAP_ICM_AUX ||
229 	    op == MLX4_CMD_UNMAP_FA)
230 		return 1;
231 	/* Error on MLX4_CMD_HW2SW_MPT is fatal except when fw status equals
232 	  * CMD_STAT_REG_BOUND.
233 	  * This status indicates that memory region has memory windows bound to it
234 	  * which may result from invalid user space usage and is not fatal.
235 	  */
236 	if (op == MLX4_CMD_HW2SW_MPT && fw_status != CMD_STAT_REG_BOUND)
237 		return 1;
238 	return 0;
239 }
240 
241 static int mlx4_cmd_reset_flow(struct mlx4_dev *dev, u16 op, u8 op_modifier,
242 			       int err)
243 {
244 	/* Only if reset flow is really active return code is based on
245 	  * command, otherwise current error code is returned.
246 	  */
247 	if (mlx4_internal_err_reset) {
248 		mlx4_enter_error_state(dev->persist);
249 		err = mlx4_internal_err_ret_value(dev, op, op_modifier);
250 	}
251 
252 	return err;
253 }
254 
255 static int comm_pending(struct mlx4_dev *dev)
256 {
257 	struct mlx4_priv *priv = mlx4_priv(dev);
258 	u32 status = readl(&priv->mfunc.comm->slave_read);
259 
260 	return (swab32(status) >> 31) != priv->cmd.comm_toggle;
261 }
262 
263 static int mlx4_comm_cmd_post(struct mlx4_dev *dev, u8 cmd, u16 param)
264 {
265 	struct mlx4_priv *priv = mlx4_priv(dev);
266 	u32 val;
267 
268 	/* To avoid writing to unknown addresses after the device state was
269 	 * changed to internal error and the function was rest,
270 	 * check the INTERNAL_ERROR flag which is updated under
271 	 * device_state_mutex lock.
272 	 */
273 	mutex_lock(&dev->persist->device_state_mutex);
274 
275 	if (dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) {
276 		mutex_unlock(&dev->persist->device_state_mutex);
277 		return -EIO;
278 	}
279 
280 	priv->cmd.comm_toggle ^= 1;
281 	val = param | (cmd << 16) | (priv->cmd.comm_toggle << 31);
282 	__raw_writel((__force u32) cpu_to_be32(val),
283 		     &priv->mfunc.comm->slave_write);
284 	mutex_unlock(&dev->persist->device_state_mutex);
285 	return 0;
286 }
287 
288 static int mlx4_comm_cmd_poll(struct mlx4_dev *dev, u8 cmd, u16 param,
289 		       unsigned long timeout)
290 {
291 	struct mlx4_priv *priv = mlx4_priv(dev);
292 	unsigned long end;
293 	int err = 0;
294 	int ret_from_pending = 0;
295 
296 	/* First, verify that the master reports correct status */
297 	if (comm_pending(dev)) {
298 		mlx4_warn(dev, "Communication channel is not idle - my toggle is %d (cmd:0x%x)\n",
299 			  priv->cmd.comm_toggle, cmd);
300 		return -EAGAIN;
301 	}
302 
303 	/* Write command */
304 	down(&priv->cmd.poll_sem);
305 	if (mlx4_comm_cmd_post(dev, cmd, param)) {
306 		/* Only in case the device state is INTERNAL_ERROR,
307 		 * mlx4_comm_cmd_post returns with an error
308 		 */
309 		err = mlx4_status_to_errno(CMD_STAT_INTERNAL_ERR);
310 		goto out;
311 	}
312 
313 	end = msecs_to_jiffies(timeout) + jiffies;
314 	while (comm_pending(dev) && time_before(jiffies, end))
315 		cond_resched();
316 	ret_from_pending = comm_pending(dev);
317 	if (ret_from_pending) {
318 		/* check if the slave is trying to boot in the middle of
319 		 * FLR process. The only non-zero result in the RESET command
320 		 * is MLX4_DELAY_RESET_SLAVE*/
321 		if ((MLX4_COMM_CMD_RESET == cmd)) {
322 			err = MLX4_DELAY_RESET_SLAVE;
323 			goto out;
324 		} else {
325 			mlx4_warn(dev, "Communication channel command 0x%x timed out\n",
326 				  cmd);
327 			err = mlx4_status_to_errno(CMD_STAT_INTERNAL_ERR);
328 		}
329 	}
330 
331 	if (err)
332 		mlx4_enter_error_state(dev->persist);
333 out:
334 	up(&priv->cmd.poll_sem);
335 	return err;
336 }
337 
338 static int mlx4_comm_cmd_wait(struct mlx4_dev *dev, u8 vhcr_cmd,
339 			      u16 param, u16 op, unsigned long timeout)
340 {
341 	struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd;
342 	struct mlx4_cmd_context *context;
343 	unsigned long end;
344 	int err = 0;
345 
346 	down(&cmd->event_sem);
347 
348 	spin_lock(&cmd->context_lock);
349 	BUG_ON(cmd->free_head < 0);
350 	context = &cmd->context[cmd->free_head];
351 	context->token += cmd->token_mask + 1;
352 	cmd->free_head = context->next;
353 	spin_unlock(&cmd->context_lock);
354 
355 	reinit_completion(&context->done);
356 
357 	if (mlx4_comm_cmd_post(dev, vhcr_cmd, param)) {
358 		/* Only in case the device state is INTERNAL_ERROR,
359 		 * mlx4_comm_cmd_post returns with an error
360 		 */
361 		err = mlx4_status_to_errno(CMD_STAT_INTERNAL_ERR);
362 		goto out;
363 	}
364 
365 	if (!wait_for_completion_timeout(&context->done,
366 					 msecs_to_jiffies(timeout))) {
367 		mlx4_warn(dev, "communication channel command 0x%x (op=0x%x) timed out\n",
368 			  vhcr_cmd, op);
369 		goto out_reset;
370 	}
371 
372 	err = context->result;
373 	if (err && context->fw_status != CMD_STAT_MULTI_FUNC_REQ) {
374 		mlx4_err(dev, "command 0x%x failed: fw status = 0x%x\n",
375 			 vhcr_cmd, context->fw_status);
376 		if (mlx4_closing_cmd_fatal_error(op, context->fw_status))
377 			goto out_reset;
378 	}
379 
380 	/* wait for comm channel ready
381 	 * this is necessary for prevention the race
382 	 * when switching between event to polling mode
383 	 * Skipping this section in case the device is in FATAL_ERROR state,
384 	 * In this state, no commands are sent via the comm channel until
385 	 * the device has returned from reset.
386 	 */
387 	if (!(dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR)) {
388 		end = msecs_to_jiffies(timeout) + jiffies;
389 		while (comm_pending(dev) && time_before(jiffies, end))
390 			cond_resched();
391 	}
392 	goto out;
393 
394 out_reset:
395 	err = mlx4_status_to_errno(CMD_STAT_INTERNAL_ERR);
396 	mlx4_enter_error_state(dev->persist);
397 out:
398 	spin_lock(&cmd->context_lock);
399 	context->next = cmd->free_head;
400 	cmd->free_head = context - cmd->context;
401 	spin_unlock(&cmd->context_lock);
402 
403 	up(&cmd->event_sem);
404 	return err;
405 }
406 
407 int mlx4_comm_cmd(struct mlx4_dev *dev, u8 cmd, u16 param,
408 		  u16 op, unsigned long timeout)
409 {
410 	if (dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR)
411 		return mlx4_status_to_errno(CMD_STAT_INTERNAL_ERR);
412 
413 	if (mlx4_priv(dev)->cmd.use_events)
414 		return mlx4_comm_cmd_wait(dev, cmd, param, op, timeout);
415 	return mlx4_comm_cmd_poll(dev, cmd, param, timeout);
416 }
417 
418 static int cmd_pending(struct mlx4_dev *dev)
419 {
420 	u32 status;
421 
422 	if (pci_channel_offline(dev->persist->pdev))
423 		return -EIO;
424 
425 	status = readl(mlx4_priv(dev)->cmd.hcr + HCR_STATUS_OFFSET);
426 
427 	return (status & swab32(1 << HCR_GO_BIT)) ||
428 		(mlx4_priv(dev)->cmd.toggle ==
429 		 !!(status & swab32(1 << HCR_T_BIT)));
430 }
431 
432 static int mlx4_cmd_post(struct mlx4_dev *dev, u64 in_param, u64 out_param,
433 			 u32 in_modifier, u8 op_modifier, u16 op, u16 token,
434 			 int event)
435 {
436 	struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd;
437 	u32 __iomem *hcr = cmd->hcr;
438 	int ret = -EIO;
439 	unsigned long end;
440 
441 	mutex_lock(&dev->persist->device_state_mutex);
442 	/* To avoid writing to unknown addresses after the device state was
443 	  * changed to internal error and the chip was reset,
444 	  * check the INTERNAL_ERROR flag which is updated under
445 	  * device_state_mutex lock.
446 	  */
447 	if (pci_channel_offline(dev->persist->pdev) ||
448 	    (dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR)) {
449 		/*
450 		 * Device is going through error recovery
451 		 * and cannot accept commands.
452 		 */
453 		goto out;
454 	}
455 
456 	end = jiffies;
457 	if (event)
458 		end += msecs_to_jiffies(GO_BIT_TIMEOUT_MSECS);
459 
460 	while (cmd_pending(dev)) {
461 		if (pci_channel_offline(dev->persist->pdev)) {
462 			/*
463 			 * Device is going through error recovery
464 			 * and cannot accept commands.
465 			 */
466 			goto out;
467 		}
468 
469 		if (time_after_eq(jiffies, end)) {
470 			mlx4_err(dev, "%s:cmd_pending failed\n", __func__);
471 			goto out;
472 		}
473 		cond_resched();
474 	}
475 
476 	/*
477 	 * We use writel (instead of something like memcpy_toio)
478 	 * because writes of less than 32 bits to the HCR don't work
479 	 * (and some architectures such as ia64 implement memcpy_toio
480 	 * in terms of writeb).
481 	 */
482 	__raw_writel((__force u32) cpu_to_be32(in_param >> 32),		  hcr + 0);
483 	__raw_writel((__force u32) cpu_to_be32(in_param & 0xfffffffful),  hcr + 1);
484 	__raw_writel((__force u32) cpu_to_be32(in_modifier),		  hcr + 2);
485 	__raw_writel((__force u32) cpu_to_be32(out_param >> 32),	  hcr + 3);
486 	__raw_writel((__force u32) cpu_to_be32(out_param & 0xfffffffful), hcr + 4);
487 	__raw_writel((__force u32) cpu_to_be32(token << 16),		  hcr + 5);
488 
489 	/* __raw_writel may not order writes. */
490 	wmb();
491 
492 	__raw_writel((__force u32) cpu_to_be32((1 << HCR_GO_BIT)		|
493 					       (cmd->toggle << HCR_T_BIT)	|
494 					       (event ? (1 << HCR_E_BIT) : 0)	|
495 					       (op_modifier << HCR_OPMOD_SHIFT) |
496 					       op), hcr + 6);
497 
498 	cmd->toggle = cmd->toggle ^ 1;
499 
500 	ret = 0;
501 
502 out:
503 	if (ret)
504 		mlx4_warn(dev, "Could not post command 0x%x: ret=%d, in_param=0x%llx, in_mod=0x%x, op_mod=0x%x\n",
505 			  op, ret, in_param, in_modifier, op_modifier);
506 	mutex_unlock(&dev->persist->device_state_mutex);
507 
508 	return ret;
509 }
510 
511 static int mlx4_slave_cmd(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
512 			  int out_is_imm, u32 in_modifier, u8 op_modifier,
513 			  u16 op, unsigned long timeout)
514 {
515 	struct mlx4_priv *priv = mlx4_priv(dev);
516 	struct mlx4_vhcr_cmd *vhcr = priv->mfunc.vhcr;
517 	int ret;
518 
519 	mutex_lock(&priv->cmd.slave_cmd_mutex);
520 
521 	vhcr->in_param = cpu_to_be64(in_param);
522 	vhcr->out_param = out_param ? cpu_to_be64(*out_param) : 0;
523 	vhcr->in_modifier = cpu_to_be32(in_modifier);
524 	vhcr->opcode = cpu_to_be16((((u16) op_modifier) << 12) | (op & 0xfff));
525 	vhcr->token = cpu_to_be16(CMD_POLL_TOKEN);
526 	vhcr->status = 0;
527 	vhcr->flags = !!(priv->cmd.use_events) << 6;
528 
529 	if (mlx4_is_master(dev)) {
530 		ret = mlx4_master_process_vhcr(dev, dev->caps.function, vhcr);
531 		if (!ret) {
532 			if (out_is_imm) {
533 				if (out_param)
534 					*out_param =
535 						be64_to_cpu(vhcr->out_param);
536 				else {
537 					mlx4_err(dev, "response expected while output mailbox is NULL for command 0x%x\n",
538 						 op);
539 					vhcr->status = CMD_STAT_BAD_PARAM;
540 				}
541 			}
542 			ret = mlx4_status_to_errno(vhcr->status);
543 		}
544 		if (ret &&
545 		    dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR)
546 			ret = mlx4_internal_err_ret_value(dev, op, op_modifier);
547 	} else {
548 		ret = mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR_POST, 0, op,
549 				    MLX4_COMM_TIME + timeout);
550 		if (!ret) {
551 			if (out_is_imm) {
552 				if (out_param)
553 					*out_param =
554 						be64_to_cpu(vhcr->out_param);
555 				else {
556 					mlx4_err(dev, "response expected while output mailbox is NULL for command 0x%x\n",
557 						 op);
558 					vhcr->status = CMD_STAT_BAD_PARAM;
559 				}
560 			}
561 			ret = mlx4_status_to_errno(vhcr->status);
562 		} else {
563 			if (dev->persist->state &
564 			    MLX4_DEVICE_STATE_INTERNAL_ERROR)
565 				ret = mlx4_internal_err_ret_value(dev, op,
566 								  op_modifier);
567 			else
568 				mlx4_err(dev, "failed execution of VHCR_POST command opcode 0x%x\n", op);
569 		}
570 	}
571 
572 	mutex_unlock(&priv->cmd.slave_cmd_mutex);
573 	return ret;
574 }
575 
576 static int mlx4_cmd_poll(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
577 			 int out_is_imm, u32 in_modifier, u8 op_modifier,
578 			 u16 op, unsigned long timeout)
579 {
580 	struct mlx4_priv *priv = mlx4_priv(dev);
581 	void __iomem *hcr = priv->cmd.hcr;
582 	int err = 0;
583 	unsigned long end;
584 	u32 stat;
585 
586 	down(&priv->cmd.poll_sem);
587 
588 	if (dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) {
589 		/*
590 		 * Device is going through error recovery
591 		 * and cannot accept commands.
592 		 */
593 		err = mlx4_internal_err_ret_value(dev, op, op_modifier);
594 		goto out;
595 	}
596 
597 	if (out_is_imm && !out_param) {
598 		mlx4_err(dev, "response expected while output mailbox is NULL for command 0x%x\n",
599 			 op);
600 		err = -EINVAL;
601 		goto out;
602 	}
603 
604 	err = mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0,
605 			    in_modifier, op_modifier, op, CMD_POLL_TOKEN, 0);
606 	if (err)
607 		goto out_reset;
608 
609 	end = msecs_to_jiffies(timeout) + jiffies;
610 	while (cmd_pending(dev) && time_before(jiffies, end)) {
611 		if (pci_channel_offline(dev->persist->pdev)) {
612 			/*
613 			 * Device is going through error recovery
614 			 * and cannot accept commands.
615 			 */
616 			err = -EIO;
617 			goto out_reset;
618 		}
619 
620 		if (dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) {
621 			err = mlx4_internal_err_ret_value(dev, op, op_modifier);
622 			goto out;
623 		}
624 
625 		cond_resched();
626 	}
627 
628 	if (cmd_pending(dev)) {
629 		mlx4_warn(dev, "command 0x%x timed out (go bit not cleared)\n",
630 			  op);
631 		err = -EIO;
632 		goto out_reset;
633 	}
634 
635 	if (out_is_imm)
636 		*out_param =
637 			(u64) be32_to_cpu((__force __be32)
638 					  __raw_readl(hcr + HCR_OUT_PARAM_OFFSET)) << 32 |
639 			(u64) be32_to_cpu((__force __be32)
640 					  __raw_readl(hcr + HCR_OUT_PARAM_OFFSET + 4));
641 	stat = be32_to_cpu((__force __be32)
642 			   __raw_readl(hcr + HCR_STATUS_OFFSET)) >> 24;
643 	err = mlx4_status_to_errno(stat);
644 	if (err) {
645 		mlx4_err(dev, "command 0x%x failed: fw status = 0x%x\n",
646 			 op, stat);
647 		if (mlx4_closing_cmd_fatal_error(op, stat))
648 			goto out_reset;
649 		goto out;
650 	}
651 
652 out_reset:
653 	if (err)
654 		err = mlx4_cmd_reset_flow(dev, op, op_modifier, err);
655 out:
656 	up(&priv->cmd.poll_sem);
657 	return err;
658 }
659 
660 void mlx4_cmd_event(struct mlx4_dev *dev, u16 token, u8 status, u64 out_param)
661 {
662 	struct mlx4_priv *priv = mlx4_priv(dev);
663 	struct mlx4_cmd_context *context =
664 		&priv->cmd.context[token & priv->cmd.token_mask];
665 
666 	/* previously timed out command completing at long last */
667 	if (token != context->token)
668 		return;
669 
670 	context->fw_status = status;
671 	context->result    = mlx4_status_to_errno(status);
672 	context->out_param = out_param;
673 
674 	complete(&context->done);
675 }
676 
677 static int mlx4_cmd_wait(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
678 			 int out_is_imm, u32 in_modifier, u8 op_modifier,
679 			 u16 op, unsigned long timeout)
680 {
681 	struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd;
682 	struct mlx4_cmd_context *context;
683 	long ret_wait;
684 	int err = 0;
685 
686 	down(&cmd->event_sem);
687 
688 	spin_lock(&cmd->context_lock);
689 	BUG_ON(cmd->free_head < 0);
690 	context = &cmd->context[cmd->free_head];
691 	context->token += cmd->token_mask + 1;
692 	cmd->free_head = context->next;
693 	spin_unlock(&cmd->context_lock);
694 
695 	if (out_is_imm && !out_param) {
696 		mlx4_err(dev, "response expected while output mailbox is NULL for command 0x%x\n",
697 			 op);
698 		err = -EINVAL;
699 		goto out;
700 	}
701 
702 	reinit_completion(&context->done);
703 
704 	err = mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0,
705 			    in_modifier, op_modifier, op, context->token, 1);
706 	if (err)
707 		goto out_reset;
708 
709 	if (op == MLX4_CMD_SENSE_PORT) {
710 		ret_wait =
711 			wait_for_completion_interruptible_timeout(&context->done,
712 								  msecs_to_jiffies(timeout));
713 		if (ret_wait < 0) {
714 			context->fw_status = 0;
715 			context->out_param = 0;
716 			context->result = 0;
717 		}
718 	} else {
719 		ret_wait = (long)wait_for_completion_timeout(&context->done,
720 							     msecs_to_jiffies(timeout));
721 	}
722 	if (!ret_wait) {
723 		mlx4_warn(dev, "command 0x%x timed out (go bit not cleared)\n",
724 			  op);
725 		if (op == MLX4_CMD_NOP) {
726 			err = -EBUSY;
727 			goto out;
728 		} else {
729 			err = -EIO;
730 			goto out_reset;
731 		}
732 	}
733 
734 	err = context->result;
735 	if (err) {
736 		/* Since we do not want to have this error message always
737 		 * displayed at driver start when there are ConnectX2 HCAs
738 		 * on the host, we deprecate the error message for this
739 		 * specific command/input_mod/opcode_mod/fw-status to be debug.
740 		 */
741 		if (op == MLX4_CMD_SET_PORT &&
742 		    (in_modifier == 1 || in_modifier == 2) &&
743 		    op_modifier == MLX4_SET_PORT_IB_OPCODE &&
744 		    context->fw_status == CMD_STAT_BAD_SIZE)
745 			mlx4_dbg(dev, "command 0x%x failed: fw status = 0x%x\n",
746 				 op, context->fw_status);
747 		else
748 			mlx4_err(dev, "command 0x%x failed: fw status = 0x%x\n",
749 				 op, context->fw_status);
750 		if (dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR)
751 			err = mlx4_internal_err_ret_value(dev, op, op_modifier);
752 		else if (mlx4_closing_cmd_fatal_error(op, context->fw_status))
753 			goto out_reset;
754 
755 		goto out;
756 	}
757 
758 	if (out_is_imm)
759 		*out_param = context->out_param;
760 
761 out_reset:
762 	if (err)
763 		err = mlx4_cmd_reset_flow(dev, op, op_modifier, err);
764 out:
765 	spin_lock(&cmd->context_lock);
766 	context->next = cmd->free_head;
767 	cmd->free_head = context - cmd->context;
768 	spin_unlock(&cmd->context_lock);
769 
770 	up(&cmd->event_sem);
771 	return err;
772 }
773 
774 int __mlx4_cmd(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
775 	       int out_is_imm, u32 in_modifier, u8 op_modifier,
776 	       u16 op, unsigned long timeout, int native)
777 {
778 	if (pci_channel_offline(dev->persist->pdev))
779 		return mlx4_cmd_reset_flow(dev, op, op_modifier, -EIO);
780 
781 	if (!mlx4_is_mfunc(dev) || (native && mlx4_is_master(dev))) {
782 		int ret;
783 
784 		if (dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR)
785 			return mlx4_internal_err_ret_value(dev, op,
786 							  op_modifier);
787 		down_read(&mlx4_priv(dev)->cmd.switch_sem);
788 		if (mlx4_priv(dev)->cmd.use_events)
789 			ret = mlx4_cmd_wait(dev, in_param, out_param,
790 					    out_is_imm, in_modifier,
791 					    op_modifier, op, timeout);
792 		else
793 			ret = mlx4_cmd_poll(dev, in_param, out_param,
794 					    out_is_imm, in_modifier,
795 					    op_modifier, op, timeout);
796 
797 		up_read(&mlx4_priv(dev)->cmd.switch_sem);
798 		return ret;
799 	}
800 	return mlx4_slave_cmd(dev, in_param, out_param, out_is_imm,
801 			      in_modifier, op_modifier, op, timeout);
802 }
803 EXPORT_SYMBOL_GPL(__mlx4_cmd);
804 
805 
806 int mlx4_ARM_COMM_CHANNEL(struct mlx4_dev *dev)
807 {
808 	return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_ARM_COMM_CHANNEL,
809 			MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);
810 }
811 
812 static int mlx4_ACCESS_MEM(struct mlx4_dev *dev, u64 master_addr,
813 			   int slave, u64 slave_addr,
814 			   int size, int is_read)
815 {
816 	u64 in_param;
817 	u64 out_param;
818 
819 	if ((slave_addr & 0xfff) | (master_addr & 0xfff) |
820 	    (slave & ~0x7f) | (size & 0xff)) {
821 		mlx4_err(dev, "Bad access mem params - slave_addr:0x%llx master_addr:0x%llx slave_id:%d size:%d\n",
822 			 slave_addr, master_addr, slave, size);
823 		return -EINVAL;
824 	}
825 
826 	if (is_read) {
827 		in_param = (u64) slave | slave_addr;
828 		out_param = (u64) dev->caps.function | master_addr;
829 	} else {
830 		in_param = (u64) dev->caps.function | master_addr;
831 		out_param = (u64) slave | slave_addr;
832 	}
833 
834 	return mlx4_cmd_imm(dev, in_param, &out_param, size, 0,
835 			    MLX4_CMD_ACCESS_MEM,
836 			    MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);
837 }
838 
839 static int query_pkey_block(struct mlx4_dev *dev, u8 port, u16 index, u16 *pkey,
840 			       struct mlx4_cmd_mailbox *inbox,
841 			       struct mlx4_cmd_mailbox *outbox)
842 {
843 	struct ib_smp *in_mad = (struct ib_smp *)(inbox->buf);
844 	struct ib_smp *out_mad = (struct ib_smp *)(outbox->buf);
845 	int err;
846 	int i;
847 
848 	if (index & 0x1f)
849 		return -EINVAL;
850 
851 	in_mad->attr_mod = cpu_to_be32(index / 32);
852 
853 	err = mlx4_cmd_box(dev, inbox->dma, outbox->dma, port, 3,
854 			   MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C,
855 			   MLX4_CMD_NATIVE);
856 	if (err)
857 		return err;
858 
859 	for (i = 0; i < 32; ++i)
860 		pkey[i] = be16_to_cpu(((__be16 *) out_mad->data)[i]);
861 
862 	return err;
863 }
864 
865 static int get_full_pkey_table(struct mlx4_dev *dev, u8 port, u16 *table,
866 			       struct mlx4_cmd_mailbox *inbox,
867 			       struct mlx4_cmd_mailbox *outbox)
868 {
869 	int i;
870 	int err;
871 
872 	for (i = 0; i < dev->caps.pkey_table_len[port]; i += 32) {
873 		err = query_pkey_block(dev, port, i, table + i, inbox, outbox);
874 		if (err)
875 			return err;
876 	}
877 
878 	return 0;
879 }
880 #define PORT_CAPABILITY_LOCATION_IN_SMP 20
881 #define PORT_STATE_OFFSET 32
882 
883 static enum ib_port_state vf_port_state(struct mlx4_dev *dev, int port, int vf)
884 {
885 	if (mlx4_get_slave_port_state(dev, vf, port) == SLAVE_PORT_UP)
886 		return IB_PORT_ACTIVE;
887 	else
888 		return IB_PORT_DOWN;
889 }
890 
891 static int mlx4_MAD_IFC_wrapper(struct mlx4_dev *dev, int slave,
892 				struct mlx4_vhcr *vhcr,
893 				struct mlx4_cmd_mailbox *inbox,
894 				struct mlx4_cmd_mailbox *outbox,
895 				struct mlx4_cmd_info *cmd)
896 {
897 	struct ib_smp *smp = inbox->buf;
898 	u32 index;
899 	u8 port, slave_port;
900 	u8 opcode_modifier;
901 	u16 *table;
902 	int err;
903 	int vidx, pidx;
904 	int network_view;
905 	struct mlx4_priv *priv = mlx4_priv(dev);
906 	struct ib_smp *outsmp = outbox->buf;
907 	__be16 *outtab = (__be16 *)(outsmp->data);
908 	__be32 slave_cap_mask;
909 	__be64 slave_node_guid;
910 
911 	slave_port = vhcr->in_modifier;
912 	port = mlx4_slave_convert_port(dev, slave, slave_port);
913 
914 	/* network-view bit is for driver use only, and should not be passed to FW */
915 	opcode_modifier = vhcr->op_modifier & ~0x8; /* clear netw view bit */
916 	network_view = !!(vhcr->op_modifier & 0x8);
917 
918 	if (smp->base_version == 1 &&
919 	    smp->mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED &&
920 	    smp->class_version == 1) {
921 		/* host view is paravirtualized */
922 		if (!network_view && smp->method == IB_MGMT_METHOD_GET) {
923 			if (smp->attr_id == IB_SMP_ATTR_PKEY_TABLE) {
924 				index = be32_to_cpu(smp->attr_mod);
925 				if (port < 1 || port > dev->caps.num_ports)
926 					return -EINVAL;
927 				table = kcalloc((dev->caps.pkey_table_len[port] / 32) + 1,
928 						sizeof(*table) * 32, GFP_KERNEL);
929 
930 				if (!table)
931 					return -ENOMEM;
932 				/* need to get the full pkey table because the paravirtualized
933 				 * pkeys may be scattered among several pkey blocks.
934 				 */
935 				err = get_full_pkey_table(dev, port, table, inbox, outbox);
936 				if (!err) {
937 					for (vidx = index * 32; vidx < (index + 1) * 32; ++vidx) {
938 						pidx = priv->virt2phys_pkey[slave][port - 1][vidx];
939 						outtab[vidx % 32] = cpu_to_be16(table[pidx]);
940 					}
941 				}
942 				kfree(table);
943 				return err;
944 			}
945 			if (smp->attr_id == IB_SMP_ATTR_PORT_INFO) {
946 				/*get the slave specific caps:*/
947 				/*do the command */
948 				smp->attr_mod = cpu_to_be32(port);
949 				err = mlx4_cmd_box(dev, inbox->dma, outbox->dma,
950 					    port, opcode_modifier,
951 					    vhcr->op, MLX4_CMD_TIME_CLASS_C, MLX4_CMD_NATIVE);
952 				/* modify the response for slaves */
953 				if (!err && slave != mlx4_master_func_num(dev)) {
954 					u8 *state = outsmp->data + PORT_STATE_OFFSET;
955 
956 					*state = (*state & 0xf0) | vf_port_state(dev, port, slave);
957 					slave_cap_mask = priv->mfunc.master.slave_state[slave].ib_cap_mask[port];
958 					memcpy(outsmp->data + PORT_CAPABILITY_LOCATION_IN_SMP, &slave_cap_mask, 4);
959 				}
960 				return err;
961 			}
962 			if (smp->attr_id == IB_SMP_ATTR_GUID_INFO) {
963 				__be64 guid = mlx4_get_admin_guid(dev, slave,
964 								  port);
965 
966 				/* set the PF admin guid to the FW/HW burned
967 				 * GUID, if it wasn't yet set
968 				 */
969 				if (slave == 0 && guid == 0) {
970 					smp->attr_mod = 0;
971 					err = mlx4_cmd_box(dev,
972 							   inbox->dma,
973 							   outbox->dma,
974 							   vhcr->in_modifier,
975 							   opcode_modifier,
976 							   vhcr->op,
977 							   MLX4_CMD_TIME_CLASS_C,
978 							   MLX4_CMD_NATIVE);
979 					if (err)
980 						return err;
981 					mlx4_set_admin_guid(dev,
982 							    *(__be64 *)outsmp->
983 							    data, slave, port);
984 				} else {
985 					memcpy(outsmp->data, &guid, 8);
986 				}
987 
988 				/* clean all other gids */
989 				memset(outsmp->data + 8, 0, 56);
990 				return 0;
991 			}
992 			if (smp->attr_id == IB_SMP_ATTR_NODE_INFO) {
993 				err = mlx4_cmd_box(dev, inbox->dma, outbox->dma,
994 					     port, opcode_modifier,
995 					     vhcr->op, MLX4_CMD_TIME_CLASS_C, MLX4_CMD_NATIVE);
996 				if (!err) {
997 					slave_node_guid =  mlx4_get_slave_node_guid(dev, slave);
998 					memcpy(outsmp->data + 12, &slave_node_guid, 8);
999 				}
1000 				return err;
1001 			}
1002 		}
1003 	}
1004 
1005 	/* Non-privileged VFs are only allowed "host" view LID-routed 'Get' MADs.
1006 	 * These are the MADs used by ib verbs (such as ib_query_gids).
1007 	 */
1008 	if (slave != mlx4_master_func_num(dev) &&
1009 	    !mlx4_vf_smi_enabled(dev, slave, port)) {
1010 		if (!(smp->mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED &&
1011 		      smp->method == IB_MGMT_METHOD_GET) || network_view) {
1012 			mlx4_err(dev, "Unprivileged slave %d is trying to execute a Subnet MGMT MAD, class 0x%x, method 0x%x, view=%s for attr 0x%x. Rejecting\n",
1013 				 slave, smp->mgmt_class, smp->method,
1014 				 network_view ? "Network" : "Host",
1015 				 be16_to_cpu(smp->attr_id));
1016 			return -EPERM;
1017 		}
1018 	}
1019 
1020 	return mlx4_cmd_box(dev, inbox->dma, outbox->dma,
1021 				    vhcr->in_modifier, opcode_modifier,
1022 				    vhcr->op, MLX4_CMD_TIME_CLASS_C, MLX4_CMD_NATIVE);
1023 }
1024 
1025 static int mlx4_CMD_EPERM_wrapper(struct mlx4_dev *dev, int slave,
1026 		     struct mlx4_vhcr *vhcr,
1027 		     struct mlx4_cmd_mailbox *inbox,
1028 		     struct mlx4_cmd_mailbox *outbox,
1029 		     struct mlx4_cmd_info *cmd)
1030 {
1031 	return -EPERM;
1032 }
1033 
1034 int mlx4_DMA_wrapper(struct mlx4_dev *dev, int slave,
1035 		     struct mlx4_vhcr *vhcr,
1036 		     struct mlx4_cmd_mailbox *inbox,
1037 		     struct mlx4_cmd_mailbox *outbox,
1038 		     struct mlx4_cmd_info *cmd)
1039 {
1040 	u64 in_param;
1041 	u64 out_param;
1042 	int err;
1043 
1044 	in_param = cmd->has_inbox ? (u64) inbox->dma : vhcr->in_param;
1045 	out_param = cmd->has_outbox ? (u64) outbox->dma : vhcr->out_param;
1046 	if (cmd->encode_slave_id) {
1047 		in_param &= 0xffffffffffffff00ll;
1048 		in_param |= slave;
1049 	}
1050 
1051 	err = __mlx4_cmd(dev, in_param, &out_param, cmd->out_is_imm,
1052 			 vhcr->in_modifier, vhcr->op_modifier, vhcr->op,
1053 			 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);
1054 
1055 	if (cmd->out_is_imm)
1056 		vhcr->out_param = out_param;
1057 
1058 	return err;
1059 }
1060 
1061 static struct mlx4_cmd_info cmd_info[] = {
1062 	{
1063 		.opcode = MLX4_CMD_QUERY_FW,
1064 		.has_inbox = false,
1065 		.has_outbox = true,
1066 		.out_is_imm = false,
1067 		.encode_slave_id = false,
1068 		.verify = NULL,
1069 		.wrapper = mlx4_QUERY_FW_wrapper
1070 	},
1071 	{
1072 		.opcode = MLX4_CMD_QUERY_HCA,
1073 		.has_inbox = false,
1074 		.has_outbox = true,
1075 		.out_is_imm = false,
1076 		.encode_slave_id = false,
1077 		.verify = NULL,
1078 		.wrapper = NULL
1079 	},
1080 	{
1081 		.opcode = MLX4_CMD_QUERY_DEV_CAP,
1082 		.has_inbox = false,
1083 		.has_outbox = true,
1084 		.out_is_imm = false,
1085 		.encode_slave_id = false,
1086 		.verify = NULL,
1087 		.wrapper = mlx4_QUERY_DEV_CAP_wrapper
1088 	},
1089 	{
1090 		.opcode = MLX4_CMD_QUERY_FUNC_CAP,
1091 		.has_inbox = false,
1092 		.has_outbox = true,
1093 		.out_is_imm = false,
1094 		.encode_slave_id = false,
1095 		.verify = NULL,
1096 		.wrapper = mlx4_QUERY_FUNC_CAP_wrapper
1097 	},
1098 	{
1099 		.opcode = MLX4_CMD_QUERY_ADAPTER,
1100 		.has_inbox = false,
1101 		.has_outbox = true,
1102 		.out_is_imm = false,
1103 		.encode_slave_id = false,
1104 		.verify = NULL,
1105 		.wrapper = NULL
1106 	},
1107 	{
1108 		.opcode = MLX4_CMD_INIT_PORT,
1109 		.has_inbox = false,
1110 		.has_outbox = false,
1111 		.out_is_imm = false,
1112 		.encode_slave_id = false,
1113 		.verify = NULL,
1114 		.wrapper = mlx4_INIT_PORT_wrapper
1115 	},
1116 	{
1117 		.opcode = MLX4_CMD_CLOSE_PORT,
1118 		.has_inbox = false,
1119 		.has_outbox = false,
1120 		.out_is_imm  = false,
1121 		.encode_slave_id = false,
1122 		.verify = NULL,
1123 		.wrapper = mlx4_CLOSE_PORT_wrapper
1124 	},
1125 	{
1126 		.opcode = MLX4_CMD_QUERY_PORT,
1127 		.has_inbox = false,
1128 		.has_outbox = true,
1129 		.out_is_imm = false,
1130 		.encode_slave_id = false,
1131 		.verify = NULL,
1132 		.wrapper = mlx4_QUERY_PORT_wrapper
1133 	},
1134 	{
1135 		.opcode = MLX4_CMD_SET_PORT,
1136 		.has_inbox = true,
1137 		.has_outbox = false,
1138 		.out_is_imm = false,
1139 		.encode_slave_id = false,
1140 		.verify = NULL,
1141 		.wrapper = mlx4_SET_PORT_wrapper
1142 	},
1143 	{
1144 		.opcode = MLX4_CMD_MAP_EQ,
1145 		.has_inbox = false,
1146 		.has_outbox = false,
1147 		.out_is_imm = false,
1148 		.encode_slave_id = false,
1149 		.verify = NULL,
1150 		.wrapper = mlx4_MAP_EQ_wrapper
1151 	},
1152 	{
1153 		.opcode = MLX4_CMD_SW2HW_EQ,
1154 		.has_inbox = true,
1155 		.has_outbox = false,
1156 		.out_is_imm = false,
1157 		.encode_slave_id = true,
1158 		.verify = NULL,
1159 		.wrapper = mlx4_SW2HW_EQ_wrapper
1160 	},
1161 	{
1162 		.opcode = MLX4_CMD_HW_HEALTH_CHECK,
1163 		.has_inbox = false,
1164 		.has_outbox = false,
1165 		.out_is_imm = false,
1166 		.encode_slave_id = false,
1167 		.verify = NULL,
1168 		.wrapper = NULL
1169 	},
1170 	{
1171 		.opcode = MLX4_CMD_NOP,
1172 		.has_inbox = false,
1173 		.has_outbox = false,
1174 		.out_is_imm = false,
1175 		.encode_slave_id = false,
1176 		.verify = NULL,
1177 		.wrapper = NULL
1178 	},
1179 	{
1180 		.opcode = MLX4_CMD_CONFIG_DEV,
1181 		.has_inbox = false,
1182 		.has_outbox = true,
1183 		.out_is_imm = false,
1184 		.encode_slave_id = false,
1185 		.verify = NULL,
1186 		.wrapper = mlx4_CONFIG_DEV_wrapper
1187 	},
1188 	{
1189 		.opcode = MLX4_CMD_ALLOC_RES,
1190 		.has_inbox = false,
1191 		.has_outbox = false,
1192 		.out_is_imm = true,
1193 		.encode_slave_id = false,
1194 		.verify = NULL,
1195 		.wrapper = mlx4_ALLOC_RES_wrapper
1196 	},
1197 	{
1198 		.opcode = MLX4_CMD_FREE_RES,
1199 		.has_inbox = false,
1200 		.has_outbox = false,
1201 		.out_is_imm = false,
1202 		.encode_slave_id = false,
1203 		.verify = NULL,
1204 		.wrapper = mlx4_FREE_RES_wrapper
1205 	},
1206 	{
1207 		.opcode = MLX4_CMD_SW2HW_MPT,
1208 		.has_inbox = true,
1209 		.has_outbox = false,
1210 		.out_is_imm = false,
1211 		.encode_slave_id = true,
1212 		.verify = NULL,
1213 		.wrapper = mlx4_SW2HW_MPT_wrapper
1214 	},
1215 	{
1216 		.opcode = MLX4_CMD_QUERY_MPT,
1217 		.has_inbox = false,
1218 		.has_outbox = true,
1219 		.out_is_imm = false,
1220 		.encode_slave_id = false,
1221 		.verify = NULL,
1222 		.wrapper = mlx4_QUERY_MPT_wrapper
1223 	},
1224 	{
1225 		.opcode = MLX4_CMD_HW2SW_MPT,
1226 		.has_inbox = false,
1227 		.has_outbox = false,
1228 		.out_is_imm = false,
1229 		.encode_slave_id = false,
1230 		.verify = NULL,
1231 		.wrapper = mlx4_HW2SW_MPT_wrapper
1232 	},
1233 	{
1234 		.opcode = MLX4_CMD_READ_MTT,
1235 		.has_inbox = false,
1236 		.has_outbox = true,
1237 		.out_is_imm = false,
1238 		.encode_slave_id = false,
1239 		.verify = NULL,
1240 		.wrapper = NULL
1241 	},
1242 	{
1243 		.opcode = MLX4_CMD_WRITE_MTT,
1244 		.has_inbox = true,
1245 		.has_outbox = false,
1246 		.out_is_imm = false,
1247 		.encode_slave_id = false,
1248 		.verify = NULL,
1249 		.wrapper = mlx4_WRITE_MTT_wrapper
1250 	},
1251 	{
1252 		.opcode = MLX4_CMD_SYNC_TPT,
1253 		.has_inbox = true,
1254 		.has_outbox = false,
1255 		.out_is_imm = false,
1256 		.encode_slave_id = false,
1257 		.verify = NULL,
1258 		.wrapper = NULL
1259 	},
1260 	{
1261 		.opcode = MLX4_CMD_HW2SW_EQ,
1262 		.has_inbox = false,
1263 		.has_outbox = false,
1264 		.out_is_imm = false,
1265 		.encode_slave_id = true,
1266 		.verify = NULL,
1267 		.wrapper = mlx4_HW2SW_EQ_wrapper
1268 	},
1269 	{
1270 		.opcode = MLX4_CMD_QUERY_EQ,
1271 		.has_inbox = false,
1272 		.has_outbox = true,
1273 		.out_is_imm = false,
1274 		.encode_slave_id = true,
1275 		.verify = NULL,
1276 		.wrapper = mlx4_QUERY_EQ_wrapper
1277 	},
1278 	{
1279 		.opcode = MLX4_CMD_SW2HW_CQ,
1280 		.has_inbox = true,
1281 		.has_outbox = false,
1282 		.out_is_imm = false,
1283 		.encode_slave_id = true,
1284 		.verify = NULL,
1285 		.wrapper = mlx4_SW2HW_CQ_wrapper
1286 	},
1287 	{
1288 		.opcode = MLX4_CMD_HW2SW_CQ,
1289 		.has_inbox = false,
1290 		.has_outbox = false,
1291 		.out_is_imm = false,
1292 		.encode_slave_id = false,
1293 		.verify = NULL,
1294 		.wrapper = mlx4_HW2SW_CQ_wrapper
1295 	},
1296 	{
1297 		.opcode = MLX4_CMD_QUERY_CQ,
1298 		.has_inbox = false,
1299 		.has_outbox = true,
1300 		.out_is_imm = false,
1301 		.encode_slave_id = false,
1302 		.verify = NULL,
1303 		.wrapper = mlx4_QUERY_CQ_wrapper
1304 	},
1305 	{
1306 		.opcode = MLX4_CMD_MODIFY_CQ,
1307 		.has_inbox = true,
1308 		.has_outbox = false,
1309 		.out_is_imm = true,
1310 		.encode_slave_id = false,
1311 		.verify = NULL,
1312 		.wrapper = mlx4_MODIFY_CQ_wrapper
1313 	},
1314 	{
1315 		.opcode = MLX4_CMD_SW2HW_SRQ,
1316 		.has_inbox = true,
1317 		.has_outbox = false,
1318 		.out_is_imm = false,
1319 		.encode_slave_id = true,
1320 		.verify = NULL,
1321 		.wrapper = mlx4_SW2HW_SRQ_wrapper
1322 	},
1323 	{
1324 		.opcode = MLX4_CMD_HW2SW_SRQ,
1325 		.has_inbox = false,
1326 		.has_outbox = false,
1327 		.out_is_imm = false,
1328 		.encode_slave_id = false,
1329 		.verify = NULL,
1330 		.wrapper = mlx4_HW2SW_SRQ_wrapper
1331 	},
1332 	{
1333 		.opcode = MLX4_CMD_QUERY_SRQ,
1334 		.has_inbox = false,
1335 		.has_outbox = true,
1336 		.out_is_imm = false,
1337 		.encode_slave_id = false,
1338 		.verify = NULL,
1339 		.wrapper = mlx4_QUERY_SRQ_wrapper
1340 	},
1341 	{
1342 		.opcode = MLX4_CMD_ARM_SRQ,
1343 		.has_inbox = false,
1344 		.has_outbox = false,
1345 		.out_is_imm = false,
1346 		.encode_slave_id = false,
1347 		.verify = NULL,
1348 		.wrapper = mlx4_ARM_SRQ_wrapper
1349 	},
1350 	{
1351 		.opcode = MLX4_CMD_RST2INIT_QP,
1352 		.has_inbox = true,
1353 		.has_outbox = false,
1354 		.out_is_imm = false,
1355 		.encode_slave_id = true,
1356 		.verify = NULL,
1357 		.wrapper = mlx4_RST2INIT_QP_wrapper
1358 	},
1359 	{
1360 		.opcode = MLX4_CMD_INIT2INIT_QP,
1361 		.has_inbox = true,
1362 		.has_outbox = false,
1363 		.out_is_imm = false,
1364 		.encode_slave_id = false,
1365 		.verify = NULL,
1366 		.wrapper = mlx4_INIT2INIT_QP_wrapper
1367 	},
1368 	{
1369 		.opcode = MLX4_CMD_INIT2RTR_QP,
1370 		.has_inbox = true,
1371 		.has_outbox = false,
1372 		.out_is_imm = false,
1373 		.encode_slave_id = false,
1374 		.verify = NULL,
1375 		.wrapper = mlx4_INIT2RTR_QP_wrapper
1376 	},
1377 	{
1378 		.opcode = MLX4_CMD_RTR2RTS_QP,
1379 		.has_inbox = true,
1380 		.has_outbox = false,
1381 		.out_is_imm = false,
1382 		.encode_slave_id = false,
1383 		.verify = NULL,
1384 		.wrapper = mlx4_RTR2RTS_QP_wrapper
1385 	},
1386 	{
1387 		.opcode = MLX4_CMD_RTS2RTS_QP,
1388 		.has_inbox = true,
1389 		.has_outbox = false,
1390 		.out_is_imm = false,
1391 		.encode_slave_id = false,
1392 		.verify = NULL,
1393 		.wrapper = mlx4_RTS2RTS_QP_wrapper
1394 	},
1395 	{
1396 		.opcode = MLX4_CMD_SQERR2RTS_QP,
1397 		.has_inbox = true,
1398 		.has_outbox = false,
1399 		.out_is_imm = false,
1400 		.encode_slave_id = false,
1401 		.verify = NULL,
1402 		.wrapper = mlx4_SQERR2RTS_QP_wrapper
1403 	},
1404 	{
1405 		.opcode = MLX4_CMD_2ERR_QP,
1406 		.has_inbox = false,
1407 		.has_outbox = false,
1408 		.out_is_imm = false,
1409 		.encode_slave_id = false,
1410 		.verify = NULL,
1411 		.wrapper = mlx4_GEN_QP_wrapper
1412 	},
1413 	{
1414 		.opcode = MLX4_CMD_RTS2SQD_QP,
1415 		.has_inbox = false,
1416 		.has_outbox = false,
1417 		.out_is_imm = false,
1418 		.encode_slave_id = false,
1419 		.verify = NULL,
1420 		.wrapper = mlx4_GEN_QP_wrapper
1421 	},
1422 	{
1423 		.opcode = MLX4_CMD_SQD2SQD_QP,
1424 		.has_inbox = true,
1425 		.has_outbox = false,
1426 		.out_is_imm = false,
1427 		.encode_slave_id = false,
1428 		.verify = NULL,
1429 		.wrapper = mlx4_SQD2SQD_QP_wrapper
1430 	},
1431 	{
1432 		.opcode = MLX4_CMD_SQD2RTS_QP,
1433 		.has_inbox = true,
1434 		.has_outbox = false,
1435 		.out_is_imm = false,
1436 		.encode_slave_id = false,
1437 		.verify = NULL,
1438 		.wrapper = mlx4_SQD2RTS_QP_wrapper
1439 	},
1440 	{
1441 		.opcode = MLX4_CMD_2RST_QP,
1442 		.has_inbox = false,
1443 		.has_outbox = false,
1444 		.out_is_imm = false,
1445 		.encode_slave_id = false,
1446 		.verify = NULL,
1447 		.wrapper = mlx4_2RST_QP_wrapper
1448 	},
1449 	{
1450 		.opcode = MLX4_CMD_QUERY_QP,
1451 		.has_inbox = false,
1452 		.has_outbox = true,
1453 		.out_is_imm = false,
1454 		.encode_slave_id = false,
1455 		.verify = NULL,
1456 		.wrapper = mlx4_GEN_QP_wrapper
1457 	},
1458 	{
1459 		.opcode = MLX4_CMD_SUSPEND_QP,
1460 		.has_inbox = false,
1461 		.has_outbox = false,
1462 		.out_is_imm = false,
1463 		.encode_slave_id = false,
1464 		.verify = NULL,
1465 		.wrapper = mlx4_GEN_QP_wrapper
1466 	},
1467 	{
1468 		.opcode = MLX4_CMD_UNSUSPEND_QP,
1469 		.has_inbox = false,
1470 		.has_outbox = false,
1471 		.out_is_imm = false,
1472 		.encode_slave_id = false,
1473 		.verify = NULL,
1474 		.wrapper = mlx4_GEN_QP_wrapper
1475 	},
1476 	{
1477 		.opcode = MLX4_CMD_UPDATE_QP,
1478 		.has_inbox = true,
1479 		.has_outbox = false,
1480 		.out_is_imm = false,
1481 		.encode_slave_id = false,
1482 		.verify = NULL,
1483 		.wrapper = mlx4_UPDATE_QP_wrapper
1484 	},
1485 	{
1486 		.opcode = MLX4_CMD_GET_OP_REQ,
1487 		.has_inbox = false,
1488 		.has_outbox = false,
1489 		.out_is_imm = false,
1490 		.encode_slave_id = false,
1491 		.verify = NULL,
1492 		.wrapper = mlx4_CMD_EPERM_wrapper,
1493 	},
1494 	{
1495 		.opcode = MLX4_CMD_ALLOCATE_VPP,
1496 		.has_inbox = false,
1497 		.has_outbox = true,
1498 		.out_is_imm = false,
1499 		.encode_slave_id = false,
1500 		.verify = NULL,
1501 		.wrapper = mlx4_CMD_EPERM_wrapper,
1502 	},
1503 	{
1504 		.opcode = MLX4_CMD_SET_VPORT_QOS,
1505 		.has_inbox = false,
1506 		.has_outbox = true,
1507 		.out_is_imm = false,
1508 		.encode_slave_id = false,
1509 		.verify = NULL,
1510 		.wrapper = mlx4_CMD_EPERM_wrapper,
1511 	},
1512 	{
1513 		.opcode = MLX4_CMD_CONF_SPECIAL_QP,
1514 		.has_inbox = false,
1515 		.has_outbox = false,
1516 		.out_is_imm = false,
1517 		.encode_slave_id = false,
1518 		.verify = NULL, /* XXX verify: only demux can do this */
1519 		.wrapper = NULL
1520 	},
1521 	{
1522 		.opcode = MLX4_CMD_MAD_IFC,
1523 		.has_inbox = true,
1524 		.has_outbox = true,
1525 		.out_is_imm = false,
1526 		.encode_slave_id = false,
1527 		.verify = NULL,
1528 		.wrapper = mlx4_MAD_IFC_wrapper
1529 	},
1530 	{
1531 		.opcode = MLX4_CMD_MAD_DEMUX,
1532 		.has_inbox = false,
1533 		.has_outbox = false,
1534 		.out_is_imm = false,
1535 		.encode_slave_id = false,
1536 		.verify = NULL,
1537 		.wrapper = mlx4_CMD_EPERM_wrapper
1538 	},
1539 	{
1540 		.opcode = MLX4_CMD_QUERY_IF_STAT,
1541 		.has_inbox = false,
1542 		.has_outbox = true,
1543 		.out_is_imm = false,
1544 		.encode_slave_id = false,
1545 		.verify = NULL,
1546 		.wrapper = mlx4_QUERY_IF_STAT_wrapper
1547 	},
1548 	{
1549 		.opcode = MLX4_CMD_ACCESS_REG,
1550 		.has_inbox = true,
1551 		.has_outbox = true,
1552 		.out_is_imm = false,
1553 		.encode_slave_id = false,
1554 		.verify = NULL,
1555 		.wrapper = mlx4_ACCESS_REG_wrapper,
1556 	},
1557 	{
1558 		.opcode = MLX4_CMD_CONGESTION_CTRL_OPCODE,
1559 		.has_inbox = false,
1560 		.has_outbox = false,
1561 		.out_is_imm = false,
1562 		.encode_slave_id = false,
1563 		.verify = NULL,
1564 		.wrapper = mlx4_CMD_EPERM_wrapper,
1565 	},
1566 	/* Native multicast commands are not available for guests */
1567 	{
1568 		.opcode = MLX4_CMD_QP_ATTACH,
1569 		.has_inbox = true,
1570 		.has_outbox = false,
1571 		.out_is_imm = false,
1572 		.encode_slave_id = false,
1573 		.verify = NULL,
1574 		.wrapper = mlx4_QP_ATTACH_wrapper
1575 	},
1576 	{
1577 		.opcode = MLX4_CMD_PROMISC,
1578 		.has_inbox = false,
1579 		.has_outbox = false,
1580 		.out_is_imm = false,
1581 		.encode_slave_id = false,
1582 		.verify = NULL,
1583 		.wrapper = mlx4_PROMISC_wrapper
1584 	},
1585 	/* Ethernet specific commands */
1586 	{
1587 		.opcode = MLX4_CMD_SET_VLAN_FLTR,
1588 		.has_inbox = true,
1589 		.has_outbox = false,
1590 		.out_is_imm = false,
1591 		.encode_slave_id = false,
1592 		.verify = NULL,
1593 		.wrapper = mlx4_SET_VLAN_FLTR_wrapper
1594 	},
1595 	{
1596 		.opcode = MLX4_CMD_SET_MCAST_FLTR,
1597 		.has_inbox = false,
1598 		.has_outbox = false,
1599 		.out_is_imm = false,
1600 		.encode_slave_id = false,
1601 		.verify = NULL,
1602 		.wrapper = mlx4_SET_MCAST_FLTR_wrapper
1603 	},
1604 	{
1605 		.opcode = MLX4_CMD_DUMP_ETH_STATS,
1606 		.has_inbox = false,
1607 		.has_outbox = true,
1608 		.out_is_imm = false,
1609 		.encode_slave_id = false,
1610 		.verify = NULL,
1611 		.wrapper = mlx4_DUMP_ETH_STATS_wrapper
1612 	},
1613 	{
1614 		.opcode = MLX4_CMD_INFORM_FLR_DONE,
1615 		.has_inbox = false,
1616 		.has_outbox = false,
1617 		.out_is_imm = false,
1618 		.encode_slave_id = false,
1619 		.verify = NULL,
1620 		.wrapper = NULL
1621 	},
1622 	/* flow steering commands */
1623 	{
1624 		.opcode = MLX4_QP_FLOW_STEERING_ATTACH,
1625 		.has_inbox = true,
1626 		.has_outbox = false,
1627 		.out_is_imm = true,
1628 		.encode_slave_id = false,
1629 		.verify = NULL,
1630 		.wrapper = mlx4_QP_FLOW_STEERING_ATTACH_wrapper
1631 	},
1632 	{
1633 		.opcode = MLX4_QP_FLOW_STEERING_DETACH,
1634 		.has_inbox = false,
1635 		.has_outbox = false,
1636 		.out_is_imm = false,
1637 		.encode_slave_id = false,
1638 		.verify = NULL,
1639 		.wrapper = mlx4_QP_FLOW_STEERING_DETACH_wrapper
1640 	},
1641 	{
1642 		.opcode = MLX4_FLOW_STEERING_IB_UC_QP_RANGE,
1643 		.has_inbox = false,
1644 		.has_outbox = false,
1645 		.out_is_imm = false,
1646 		.encode_slave_id = false,
1647 		.verify = NULL,
1648 		.wrapper = mlx4_CMD_EPERM_wrapper
1649 	},
1650 	{
1651 		.opcode = MLX4_CMD_VIRT_PORT_MAP,
1652 		.has_inbox = false,
1653 		.has_outbox = false,
1654 		.out_is_imm = false,
1655 		.encode_slave_id = false,
1656 		.verify = NULL,
1657 		.wrapper = mlx4_CMD_EPERM_wrapper
1658 	},
1659 };
1660 
1661 static int mlx4_master_process_vhcr(struct mlx4_dev *dev, int slave,
1662 				    struct mlx4_vhcr_cmd *in_vhcr)
1663 {
1664 	struct mlx4_priv *priv = mlx4_priv(dev);
1665 	struct mlx4_cmd_info *cmd = NULL;
1666 	struct mlx4_vhcr_cmd *vhcr_cmd = in_vhcr ? in_vhcr : priv->mfunc.vhcr;
1667 	struct mlx4_vhcr *vhcr;
1668 	struct mlx4_cmd_mailbox *inbox = NULL;
1669 	struct mlx4_cmd_mailbox *outbox = NULL;
1670 	u64 in_param;
1671 	u64 out_param;
1672 	int ret = 0;
1673 	int i;
1674 	int err = 0;
1675 
1676 	/* Create sw representation of Virtual HCR */
1677 	vhcr = kzalloc(sizeof(struct mlx4_vhcr), GFP_KERNEL);
1678 	if (!vhcr)
1679 		return -ENOMEM;
1680 
1681 	/* DMA in the vHCR */
1682 	if (!in_vhcr) {
1683 		ret = mlx4_ACCESS_MEM(dev, priv->mfunc.vhcr_dma, slave,
1684 				      priv->mfunc.master.slave_state[slave].vhcr_dma,
1685 				      ALIGN(sizeof(struct mlx4_vhcr_cmd),
1686 					    MLX4_ACCESS_MEM_ALIGN), 1);
1687 		if (ret) {
1688 			if (!(dev->persist->state &
1689 			    MLX4_DEVICE_STATE_INTERNAL_ERROR))
1690 				mlx4_err(dev, "%s: Failed reading vhcr ret: 0x%x\n",
1691 					 __func__, ret);
1692 			kfree(vhcr);
1693 			return ret;
1694 		}
1695 	}
1696 
1697 	/* Fill SW VHCR fields */
1698 	vhcr->in_param = be64_to_cpu(vhcr_cmd->in_param);
1699 	vhcr->out_param = be64_to_cpu(vhcr_cmd->out_param);
1700 	vhcr->in_modifier = be32_to_cpu(vhcr_cmd->in_modifier);
1701 	vhcr->token = be16_to_cpu(vhcr_cmd->token);
1702 	vhcr->op = be16_to_cpu(vhcr_cmd->opcode) & 0xfff;
1703 	vhcr->op_modifier = (u8) (be16_to_cpu(vhcr_cmd->opcode) >> 12);
1704 	vhcr->e_bit = vhcr_cmd->flags & (1 << 6);
1705 
1706 	/* Lookup command */
1707 	for (i = 0; i < ARRAY_SIZE(cmd_info); ++i) {
1708 		if (vhcr->op == cmd_info[i].opcode) {
1709 			cmd = &cmd_info[i];
1710 			break;
1711 		}
1712 	}
1713 	if (!cmd) {
1714 		mlx4_err(dev, "Unknown command:0x%x accepted from slave:%d\n",
1715 			 vhcr->op, slave);
1716 		vhcr_cmd->status = CMD_STAT_BAD_PARAM;
1717 		goto out_status;
1718 	}
1719 
1720 	/* Read inbox */
1721 	if (cmd->has_inbox) {
1722 		vhcr->in_param &= INBOX_MASK;
1723 		inbox = mlx4_alloc_cmd_mailbox(dev);
1724 		if (IS_ERR(inbox)) {
1725 			vhcr_cmd->status = CMD_STAT_BAD_SIZE;
1726 			inbox = NULL;
1727 			goto out_status;
1728 		}
1729 
1730 		ret = mlx4_ACCESS_MEM(dev, inbox->dma, slave,
1731 				      vhcr->in_param,
1732 				      MLX4_MAILBOX_SIZE, 1);
1733 		if (ret) {
1734 			if (!(dev->persist->state &
1735 			    MLX4_DEVICE_STATE_INTERNAL_ERROR))
1736 				mlx4_err(dev, "%s: Failed reading inbox (cmd:0x%x)\n",
1737 					 __func__, cmd->opcode);
1738 			vhcr_cmd->status = CMD_STAT_INTERNAL_ERR;
1739 			goto out_status;
1740 		}
1741 	}
1742 
1743 	/* Apply permission and bound checks if applicable */
1744 	if (cmd->verify && cmd->verify(dev, slave, vhcr, inbox)) {
1745 		mlx4_warn(dev, "Command:0x%x from slave: %d failed protection checks for resource_id:%d\n",
1746 			  vhcr->op, slave, vhcr->in_modifier);
1747 		vhcr_cmd->status = CMD_STAT_BAD_OP;
1748 		goto out_status;
1749 	}
1750 
1751 	/* Allocate outbox */
1752 	if (cmd->has_outbox) {
1753 		outbox = mlx4_alloc_cmd_mailbox(dev);
1754 		if (IS_ERR(outbox)) {
1755 			vhcr_cmd->status = CMD_STAT_BAD_SIZE;
1756 			outbox = NULL;
1757 			goto out_status;
1758 		}
1759 	}
1760 
1761 	/* Execute the command! */
1762 	if (cmd->wrapper) {
1763 		err = cmd->wrapper(dev, slave, vhcr, inbox, outbox,
1764 				   cmd);
1765 		if (cmd->out_is_imm)
1766 			vhcr_cmd->out_param = cpu_to_be64(vhcr->out_param);
1767 	} else {
1768 		in_param = cmd->has_inbox ? (u64) inbox->dma :
1769 			vhcr->in_param;
1770 		out_param = cmd->has_outbox ? (u64) outbox->dma :
1771 			vhcr->out_param;
1772 		err = __mlx4_cmd(dev, in_param, &out_param,
1773 				 cmd->out_is_imm, vhcr->in_modifier,
1774 				 vhcr->op_modifier, vhcr->op,
1775 				 MLX4_CMD_TIME_CLASS_A,
1776 				 MLX4_CMD_NATIVE);
1777 
1778 		if (cmd->out_is_imm) {
1779 			vhcr->out_param = out_param;
1780 			vhcr_cmd->out_param = cpu_to_be64(vhcr->out_param);
1781 		}
1782 	}
1783 
1784 	if (err) {
1785 		if (!(dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR)) {
1786 			if (vhcr->op == MLX4_CMD_ALLOC_RES &&
1787 			    (vhcr->in_modifier & 0xff) == RES_COUNTER &&
1788 			    err == -EDQUOT)
1789 				mlx4_dbg(dev,
1790 					 "Unable to allocate counter for slave %d (%d)\n",
1791 					 slave, err);
1792 			else
1793 				mlx4_warn(dev, "vhcr command:0x%x slave:%d failed with error:%d, status %d\n",
1794 					  vhcr->op, slave, vhcr->errno, err);
1795 		}
1796 		vhcr_cmd->status = mlx4_errno_to_status(err);
1797 		goto out_status;
1798 	}
1799 
1800 
1801 	/* Write outbox if command completed successfully */
1802 	if (cmd->has_outbox && !vhcr_cmd->status) {
1803 		ret = mlx4_ACCESS_MEM(dev, outbox->dma, slave,
1804 				      vhcr->out_param,
1805 				      MLX4_MAILBOX_SIZE, MLX4_CMD_WRAPPED);
1806 		if (ret) {
1807 			/* If we failed to write back the outbox after the
1808 			 *command was successfully executed, we must fail this
1809 			 * slave, as it is now in undefined state */
1810 			if (!(dev->persist->state &
1811 			    MLX4_DEVICE_STATE_INTERNAL_ERROR))
1812 				mlx4_err(dev, "%s:Failed writing outbox\n", __func__);
1813 			goto out;
1814 		}
1815 	}
1816 
1817 out_status:
1818 	/* DMA back vhcr result */
1819 	if (!in_vhcr) {
1820 		ret = mlx4_ACCESS_MEM(dev, priv->mfunc.vhcr_dma, slave,
1821 				      priv->mfunc.master.slave_state[slave].vhcr_dma,
1822 				      ALIGN(sizeof(struct mlx4_vhcr),
1823 					    MLX4_ACCESS_MEM_ALIGN),
1824 				      MLX4_CMD_WRAPPED);
1825 		if (ret)
1826 			mlx4_err(dev, "%s:Failed writing vhcr result\n",
1827 				 __func__);
1828 		else if (vhcr->e_bit &&
1829 			 mlx4_GEN_EQE(dev, slave, &priv->mfunc.master.cmd_eqe))
1830 				mlx4_warn(dev, "Failed to generate command completion eqe for slave %d\n",
1831 					  slave);
1832 	}
1833 
1834 out:
1835 	kfree(vhcr);
1836 	mlx4_free_cmd_mailbox(dev, inbox);
1837 	mlx4_free_cmd_mailbox(dev, outbox);
1838 	return ret;
1839 }
1840 
1841 static int mlx4_master_immediate_activate_vlan_qos(struct mlx4_priv *priv,
1842 					    int slave, int port)
1843 {
1844 	struct mlx4_vport_oper_state *vp_oper;
1845 	struct mlx4_vport_state *vp_admin;
1846 	struct mlx4_vf_immed_vlan_work *work;
1847 	struct mlx4_dev *dev = &(priv->dev);
1848 	int err;
1849 	int admin_vlan_ix = NO_INDX;
1850 
1851 	vp_oper = &priv->mfunc.master.vf_oper[slave].vport[port];
1852 	vp_admin = &priv->mfunc.master.vf_admin[slave].vport[port];
1853 
1854 	if (vp_oper->state.default_vlan == vp_admin->default_vlan &&
1855 	    vp_oper->state.default_qos == vp_admin->default_qos &&
1856 	    vp_oper->state.vlan_proto == vp_admin->vlan_proto &&
1857 	    vp_oper->state.link_state == vp_admin->link_state &&
1858 	    vp_oper->state.qos_vport == vp_admin->qos_vport)
1859 		return 0;
1860 
1861 	if (!(priv->mfunc.master.slave_state[slave].active &&
1862 	      dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_UPDATE_QP)) {
1863 		/* even if the UPDATE_QP command isn't supported, we still want
1864 		 * to set this VF link according to the admin directive
1865 		 */
1866 		vp_oper->state.link_state = vp_admin->link_state;
1867 		return -1;
1868 	}
1869 
1870 	mlx4_dbg(dev, "updating immediately admin params slave %d port %d\n",
1871 		 slave, port);
1872 	mlx4_dbg(dev, "vlan %d QoS %d link down %d\n",
1873 		 vp_admin->default_vlan, vp_admin->default_qos,
1874 		 vp_admin->link_state);
1875 
1876 	work = kzalloc(sizeof(*work), GFP_KERNEL);
1877 	if (!work)
1878 		return -ENOMEM;
1879 
1880 	if (vp_oper->state.default_vlan != vp_admin->default_vlan) {
1881 		if (MLX4_VGT != vp_admin->default_vlan) {
1882 			err = __mlx4_register_vlan(&priv->dev, port,
1883 						   vp_admin->default_vlan,
1884 						   &admin_vlan_ix);
1885 			if (err) {
1886 				kfree(work);
1887 				mlx4_warn(&priv->dev,
1888 					  "No vlan resources slave %d, port %d\n",
1889 					  slave, port);
1890 				return err;
1891 			}
1892 		} else {
1893 			admin_vlan_ix = NO_INDX;
1894 		}
1895 		work->flags |= MLX4_VF_IMMED_VLAN_FLAG_VLAN;
1896 		mlx4_dbg(&priv->dev,
1897 			 "alloc vlan %d idx  %d slave %d port %d\n",
1898 			 (int)(vp_admin->default_vlan),
1899 			 admin_vlan_ix, slave, port);
1900 	}
1901 
1902 	/* save original vlan ix and vlan id */
1903 	work->orig_vlan_id = vp_oper->state.default_vlan;
1904 	work->orig_vlan_ix = vp_oper->vlan_idx;
1905 
1906 	/* handle new qos */
1907 	if (vp_oper->state.default_qos != vp_admin->default_qos)
1908 		work->flags |= MLX4_VF_IMMED_VLAN_FLAG_QOS;
1909 
1910 	if (work->flags & MLX4_VF_IMMED_VLAN_FLAG_VLAN)
1911 		vp_oper->vlan_idx = admin_vlan_ix;
1912 
1913 	vp_oper->state.default_vlan = vp_admin->default_vlan;
1914 	vp_oper->state.default_qos = vp_admin->default_qos;
1915 	vp_oper->state.vlan_proto = vp_admin->vlan_proto;
1916 	vp_oper->state.link_state = vp_admin->link_state;
1917 	vp_oper->state.qos_vport = vp_admin->qos_vport;
1918 
1919 	if (vp_admin->link_state == IFLA_VF_LINK_STATE_DISABLE)
1920 		work->flags |= MLX4_VF_IMMED_VLAN_FLAG_LINK_DISABLE;
1921 
1922 	/* iterate over QPs owned by this slave, using UPDATE_QP */
1923 	work->port = port;
1924 	work->slave = slave;
1925 	work->qos = vp_oper->state.default_qos;
1926 	work->qos_vport = vp_oper->state.qos_vport;
1927 	work->vlan_id = vp_oper->state.default_vlan;
1928 	work->vlan_ix = vp_oper->vlan_idx;
1929 	work->vlan_proto = vp_oper->state.vlan_proto;
1930 	work->priv = priv;
1931 	INIT_WORK(&work->work, mlx4_vf_immed_vlan_work_handler);
1932 	queue_work(priv->mfunc.master.comm_wq, &work->work);
1933 
1934 	return 0;
1935 }
1936 
1937 static void mlx4_set_default_port_qos(struct mlx4_dev *dev, int port)
1938 {
1939 	struct mlx4_qos_manager *port_qos_ctl;
1940 	struct mlx4_priv *priv = mlx4_priv(dev);
1941 
1942 	port_qos_ctl = &priv->mfunc.master.qos_ctl[port];
1943 	bitmap_zero(port_qos_ctl->priority_bm, MLX4_NUM_UP);
1944 
1945 	/* Enable only default prio at PF init routine */
1946 	set_bit(MLX4_DEFAULT_QOS_PRIO, port_qos_ctl->priority_bm);
1947 }
1948 
1949 static void mlx4_allocate_port_vpps(struct mlx4_dev *dev, int port)
1950 {
1951 	int i;
1952 	int err;
1953 	int num_vfs;
1954 	u16 available_vpp;
1955 	u8 vpp_param[MLX4_NUM_UP];
1956 	struct mlx4_qos_manager *port_qos;
1957 	struct mlx4_priv *priv = mlx4_priv(dev);
1958 
1959 	err = mlx4_ALLOCATE_VPP_get(dev, port, &available_vpp, vpp_param);
1960 	if (err) {
1961 		mlx4_info(dev, "Failed query available VPPs\n");
1962 		return;
1963 	}
1964 
1965 	port_qos = &priv->mfunc.master.qos_ctl[port];
1966 	num_vfs = (available_vpp /
1967 		   bitmap_weight(port_qos->priority_bm, MLX4_NUM_UP));
1968 
1969 	for (i = 0; i < MLX4_NUM_UP; i++) {
1970 		if (test_bit(i, port_qos->priority_bm))
1971 			vpp_param[i] = num_vfs;
1972 	}
1973 
1974 	err = mlx4_ALLOCATE_VPP_set(dev, port, vpp_param);
1975 	if (err) {
1976 		mlx4_info(dev, "Failed allocating VPPs\n");
1977 		return;
1978 	}
1979 
1980 	/* Query actual allocated VPP, just to make sure */
1981 	err = mlx4_ALLOCATE_VPP_get(dev, port, &available_vpp, vpp_param);
1982 	if (err) {
1983 		mlx4_info(dev, "Failed query available VPPs\n");
1984 		return;
1985 	}
1986 
1987 	port_qos->num_of_qos_vfs = num_vfs;
1988 	mlx4_dbg(dev, "Port %d Available VPPs %d\n", port, available_vpp);
1989 
1990 	for (i = 0; i < MLX4_NUM_UP; i++)
1991 		mlx4_dbg(dev, "Port %d UP %d Allocated %d VPPs\n", port, i,
1992 			 vpp_param[i]);
1993 }
1994 
1995 static int mlx4_master_activate_admin_state(struct mlx4_priv *priv, int slave)
1996 {
1997 	int p, port, err;
1998 	struct mlx4_vport_state *vp_admin;
1999 	struct mlx4_vport_oper_state *vp_oper;
2000 	struct mlx4_slave_state *slave_state =
2001 		&priv->mfunc.master.slave_state[slave];
2002 	struct mlx4_active_ports actv_ports = mlx4_get_active_ports(
2003 			&priv->dev, slave);
2004 
2005 	for_each_set_bit(p, actv_ports.ports, priv->dev.caps.num_ports) {
2006 		port = p + 1;
2007 		priv->mfunc.master.vf_oper[slave].smi_enabled[port] =
2008 			priv->mfunc.master.vf_admin[slave].enable_smi[port];
2009 		vp_oper = &priv->mfunc.master.vf_oper[slave].vport[port];
2010 		vp_admin = &priv->mfunc.master.vf_admin[slave].vport[port];
2011 		if (vp_admin->vlan_proto != htons(ETH_P_8021AD) ||
2012 		    slave_state->vst_qinq_supported) {
2013 			vp_oper->state.vlan_proto   = vp_admin->vlan_proto;
2014 			vp_oper->state.default_vlan = vp_admin->default_vlan;
2015 			vp_oper->state.default_qos  = vp_admin->default_qos;
2016 		}
2017 		vp_oper->state.link_state = vp_admin->link_state;
2018 		vp_oper->state.mac        = vp_admin->mac;
2019 		vp_oper->state.spoofchk   = vp_admin->spoofchk;
2020 		vp_oper->state.tx_rate    = vp_admin->tx_rate;
2021 		vp_oper->state.qos_vport  = vp_admin->qos_vport;
2022 		vp_oper->state.guid       = vp_admin->guid;
2023 
2024 		if (MLX4_VGT != vp_admin->default_vlan) {
2025 			err = __mlx4_register_vlan(&priv->dev, port,
2026 						   vp_admin->default_vlan, &(vp_oper->vlan_idx));
2027 			if (err) {
2028 				vp_oper->vlan_idx = NO_INDX;
2029 				vp_oper->state.default_vlan = MLX4_VGT;
2030 				vp_oper->state.vlan_proto = htons(ETH_P_8021Q);
2031 				mlx4_warn(&priv->dev,
2032 					  "No vlan resources slave %d, port %d\n",
2033 					  slave, port);
2034 				return err;
2035 			}
2036 			mlx4_dbg(&priv->dev, "alloc vlan %d idx  %d slave %d port %d\n",
2037 				 (int)(vp_oper->state.default_vlan),
2038 				 vp_oper->vlan_idx, slave, port);
2039 		}
2040 		if (vp_admin->spoofchk) {
2041 			vp_oper->mac_idx = __mlx4_register_mac(&priv->dev,
2042 							       port,
2043 							       vp_admin->mac);
2044 			if (0 > vp_oper->mac_idx) {
2045 				err = vp_oper->mac_idx;
2046 				vp_oper->mac_idx = NO_INDX;
2047 				mlx4_warn(&priv->dev,
2048 					  "No mac resources slave %d, port %d\n",
2049 					  slave, port);
2050 				return err;
2051 			}
2052 			mlx4_dbg(&priv->dev, "alloc mac %llx idx  %d slave %d port %d\n",
2053 				 vp_oper->state.mac, vp_oper->mac_idx, slave, port);
2054 		}
2055 	}
2056 	return 0;
2057 }
2058 
2059 static void mlx4_master_deactivate_admin_state(struct mlx4_priv *priv, int slave)
2060 {
2061 	int p, port;
2062 	struct mlx4_vport_oper_state *vp_oper;
2063 	struct mlx4_active_ports actv_ports = mlx4_get_active_ports(
2064 			&priv->dev, slave);
2065 
2066 	for_each_set_bit(p, actv_ports.ports, priv->dev.caps.num_ports) {
2067 		port = p + 1;
2068 		priv->mfunc.master.vf_oper[slave].smi_enabled[port] =
2069 			MLX4_VF_SMI_DISABLED;
2070 		vp_oper = &priv->mfunc.master.vf_oper[slave].vport[port];
2071 		if (NO_INDX != vp_oper->vlan_idx) {
2072 			__mlx4_unregister_vlan(&priv->dev,
2073 					       port, vp_oper->state.default_vlan);
2074 			vp_oper->vlan_idx = NO_INDX;
2075 		}
2076 		if (NO_INDX != vp_oper->mac_idx) {
2077 			__mlx4_unregister_mac(&priv->dev, port, vp_oper->state.mac);
2078 			vp_oper->mac_idx = NO_INDX;
2079 		}
2080 	}
2081 	return;
2082 }
2083 
2084 static void mlx4_master_do_cmd(struct mlx4_dev *dev, int slave, u8 cmd,
2085 			       u16 param, u8 toggle)
2086 {
2087 	struct mlx4_priv *priv = mlx4_priv(dev);
2088 	struct mlx4_slave_state *slave_state = priv->mfunc.master.slave_state;
2089 	u32 reply;
2090 	u8 is_going_down = 0;
2091 	int i;
2092 	unsigned long flags;
2093 
2094 	slave_state[slave].comm_toggle ^= 1;
2095 	reply = (u32) slave_state[slave].comm_toggle << 31;
2096 	if (toggle != slave_state[slave].comm_toggle) {
2097 		mlx4_warn(dev, "Incorrect toggle %d from slave %d. *** MASTER STATE COMPROMISED ***\n",
2098 			  toggle, slave);
2099 		goto reset_slave;
2100 	}
2101 	if (cmd == MLX4_COMM_CMD_RESET) {
2102 		mlx4_warn(dev, "Received reset from slave:%d\n", slave);
2103 		slave_state[slave].active = false;
2104 		slave_state[slave].old_vlan_api = false;
2105 		slave_state[slave].vst_qinq_supported = false;
2106 		mlx4_master_deactivate_admin_state(priv, slave);
2107 		for (i = 0; i < MLX4_EVENT_TYPES_NUM; ++i) {
2108 				slave_state[slave].event_eq[i].eqn = -1;
2109 				slave_state[slave].event_eq[i].token = 0;
2110 		}
2111 		/*check if we are in the middle of FLR process,
2112 		if so return "retry" status to the slave*/
2113 		if (MLX4_COMM_CMD_FLR == slave_state[slave].last_cmd)
2114 			goto inform_slave_state;
2115 
2116 		mlx4_dispatch_event(dev, MLX4_DEV_EVENT_SLAVE_SHUTDOWN, &slave);
2117 
2118 		/* write the version in the event field */
2119 		reply |= mlx4_comm_get_version();
2120 
2121 		goto reset_slave;
2122 	}
2123 	/*command from slave in the middle of FLR*/
2124 	if (cmd != MLX4_COMM_CMD_RESET &&
2125 	    MLX4_COMM_CMD_FLR == slave_state[slave].last_cmd) {
2126 		mlx4_warn(dev, "slave:%d is Trying to run cmd(0x%x) in the middle of FLR\n",
2127 			  slave, cmd);
2128 		return;
2129 	}
2130 
2131 	switch (cmd) {
2132 	case MLX4_COMM_CMD_VHCR0:
2133 		if (slave_state[slave].last_cmd != MLX4_COMM_CMD_RESET)
2134 			goto reset_slave;
2135 		slave_state[slave].vhcr_dma = ((u64) param) << 48;
2136 		priv->mfunc.master.slave_state[slave].cookie = 0;
2137 		break;
2138 	case MLX4_COMM_CMD_VHCR1:
2139 		if (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR0)
2140 			goto reset_slave;
2141 		slave_state[slave].vhcr_dma |= ((u64) param) << 32;
2142 		break;
2143 	case MLX4_COMM_CMD_VHCR2:
2144 		if (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR1)
2145 			goto reset_slave;
2146 		slave_state[slave].vhcr_dma |= ((u64) param) << 16;
2147 		break;
2148 	case MLX4_COMM_CMD_VHCR_EN:
2149 		if (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR2)
2150 			goto reset_slave;
2151 		slave_state[slave].vhcr_dma |= param;
2152 		if (mlx4_master_activate_admin_state(priv, slave))
2153 				goto reset_slave;
2154 		slave_state[slave].active = true;
2155 		mlx4_dispatch_event(dev, MLX4_DEV_EVENT_SLAVE_INIT, &slave);
2156 		break;
2157 	case MLX4_COMM_CMD_VHCR_POST:
2158 		if ((slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR_EN) &&
2159 		    (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR_POST)) {
2160 			mlx4_warn(dev, "slave:%d is out of sync, cmd=0x%x, last command=0x%x, reset is needed\n",
2161 				  slave, cmd, slave_state[slave].last_cmd);
2162 			goto reset_slave;
2163 		}
2164 
2165 		mutex_lock(&priv->cmd.slave_cmd_mutex);
2166 		if (mlx4_master_process_vhcr(dev, slave, NULL)) {
2167 			mlx4_err(dev, "Failed processing vhcr for slave:%d, resetting slave\n",
2168 				 slave);
2169 			mutex_unlock(&priv->cmd.slave_cmd_mutex);
2170 			goto reset_slave;
2171 		}
2172 		mutex_unlock(&priv->cmd.slave_cmd_mutex);
2173 		break;
2174 	default:
2175 		mlx4_warn(dev, "Bad comm cmd:%d from slave:%d\n", cmd, slave);
2176 		goto reset_slave;
2177 	}
2178 	spin_lock_irqsave(&priv->mfunc.master.slave_state_lock, flags);
2179 	if (!slave_state[slave].is_slave_going_down)
2180 		slave_state[slave].last_cmd = cmd;
2181 	else
2182 		is_going_down = 1;
2183 	spin_unlock_irqrestore(&priv->mfunc.master.slave_state_lock, flags);
2184 	if (is_going_down) {
2185 		mlx4_warn(dev, "Slave is going down aborting command(%d) executing from slave:%d\n",
2186 			  cmd, slave);
2187 		return;
2188 	}
2189 	__raw_writel((__force u32) cpu_to_be32(reply),
2190 		     &priv->mfunc.comm[slave].slave_read);
2191 
2192 	return;
2193 
2194 reset_slave:
2195 	/* cleanup any slave resources */
2196 	if (dev->persist->interface_state & MLX4_INTERFACE_STATE_UP)
2197 		mlx4_delete_all_resources_for_slave(dev, slave);
2198 
2199 	if (cmd != MLX4_COMM_CMD_RESET) {
2200 		mlx4_warn(dev, "Turn on internal error to force reset, slave=%d, cmd=0x%x\n",
2201 			  slave, cmd);
2202 		/* Turn on internal error letting slave reset itself immeditaly,
2203 		 * otherwise it might take till timeout on command is passed
2204 		 */
2205 		reply |= ((u32)COMM_CHAN_EVENT_INTERNAL_ERR);
2206 	}
2207 
2208 	spin_lock_irqsave(&priv->mfunc.master.slave_state_lock, flags);
2209 	if (!slave_state[slave].is_slave_going_down)
2210 		slave_state[slave].last_cmd = MLX4_COMM_CMD_RESET;
2211 	spin_unlock_irqrestore(&priv->mfunc.master.slave_state_lock, flags);
2212 	/*with slave in the middle of flr, no need to clean resources again.*/
2213 inform_slave_state:
2214 	memset(&slave_state[slave].event_eq, 0,
2215 	       sizeof(struct mlx4_slave_event_eq_info));
2216 	__raw_writel((__force u32) cpu_to_be32(reply),
2217 		     &priv->mfunc.comm[slave].slave_read);
2218 	wmb();
2219 }
2220 
2221 /* master command processing */
2222 void mlx4_master_comm_channel(struct work_struct *work)
2223 {
2224 	struct mlx4_mfunc_master_ctx *master =
2225 		container_of(work,
2226 			     struct mlx4_mfunc_master_ctx,
2227 			     comm_work);
2228 	struct mlx4_mfunc *mfunc =
2229 		container_of(master, struct mlx4_mfunc, master);
2230 	struct mlx4_priv *priv =
2231 		container_of(mfunc, struct mlx4_priv, mfunc);
2232 	struct mlx4_dev *dev = &priv->dev;
2233 	u32 lbit_vec[COMM_CHANNEL_BIT_ARRAY_SIZE];
2234 	u32 nmbr_bits;
2235 	u32 comm_cmd;
2236 	int i, slave;
2237 	int toggle;
2238 	bool first = true;
2239 	int served = 0;
2240 	int reported = 0;
2241 	u32 slt;
2242 
2243 	for (i = 0; i < COMM_CHANNEL_BIT_ARRAY_SIZE; i++)
2244 		lbit_vec[i] = be32_to_cpu(master->comm_arm_bit_vector[i]);
2245 	nmbr_bits = dev->persist->num_vfs + 1;
2246 	if (++master->next_slave >= nmbr_bits)
2247 		master->next_slave = 0;
2248 	slave = master->next_slave;
2249 	while (true) {
2250 		slave = find_next_bit((const unsigned long *)&lbit_vec, nmbr_bits, slave);
2251 		if  (!first && slave >= master->next_slave)
2252 			break;
2253 		if (slave == nmbr_bits) {
2254 			if (!first)
2255 				break;
2256 			first = false;
2257 			slave = 0;
2258 			continue;
2259 		}
2260 		++reported;
2261 		comm_cmd = swab32(readl(&mfunc->comm[slave].slave_write));
2262 		slt = swab32(readl(&mfunc->comm[slave].slave_read)) >> 31;
2263 		toggle = comm_cmd >> 31;
2264 		if (toggle != slt) {
2265 			if (master->slave_state[slave].comm_toggle
2266 			    != slt) {
2267 				pr_info("slave %d out of sync. read toggle %d, state toggle %d. Resynching.\n",
2268 					slave, slt,
2269 					master->slave_state[slave].comm_toggle);
2270 				master->slave_state[slave].comm_toggle =
2271 					slt;
2272 			}
2273 			mlx4_master_do_cmd(dev, slave,
2274 					   comm_cmd >> 16 & 0xff,
2275 					   comm_cmd & 0xffff, toggle);
2276 			++served;
2277 		}
2278 		slave++;
2279 	}
2280 
2281 	if (reported && reported != served)
2282 		mlx4_warn(dev, "Got command event with bitmask from %d slaves but %d were served\n",
2283 			  reported, served);
2284 
2285 	if (mlx4_ARM_COMM_CHANNEL(dev))
2286 		mlx4_warn(dev, "Failed to arm comm channel events\n");
2287 }
2288 
2289 static int sync_toggles(struct mlx4_dev *dev)
2290 {
2291 	struct mlx4_priv *priv = mlx4_priv(dev);
2292 	u32 wr_toggle;
2293 	u32 rd_toggle;
2294 	unsigned long end;
2295 
2296 	wr_toggle = swab32(readl(&priv->mfunc.comm->slave_write));
2297 	if (wr_toggle == 0xffffffff)
2298 		end = jiffies + msecs_to_jiffies(30000);
2299 	else
2300 		end = jiffies + msecs_to_jiffies(5000);
2301 
2302 	while (time_before(jiffies, end)) {
2303 		rd_toggle = swab32(readl(&priv->mfunc.comm->slave_read));
2304 		if (wr_toggle == 0xffffffff || rd_toggle == 0xffffffff) {
2305 			/* PCI might be offline */
2306 
2307 			/* If device removal has been requested,
2308 			 * do not continue retrying.
2309 			 */
2310 			if (dev->persist->interface_state &
2311 			    MLX4_INTERFACE_STATE_NOWAIT) {
2312 				mlx4_warn(dev,
2313 					  "communication channel is offline\n");
2314 				return -EIO;
2315 			}
2316 
2317 			msleep(100);
2318 			wr_toggle = swab32(readl(&priv->mfunc.comm->
2319 					   slave_write));
2320 			continue;
2321 		}
2322 
2323 		if (rd_toggle >> 31 == wr_toggle >> 31) {
2324 			priv->cmd.comm_toggle = rd_toggle >> 31;
2325 			return 0;
2326 		}
2327 
2328 		cond_resched();
2329 	}
2330 
2331 	/*
2332 	 * we could reach here if for example the previous VM using this
2333 	 * function misbehaved and left the channel with unsynced state. We
2334 	 * should fix this here and give this VM a chance to use a properly
2335 	 * synced channel
2336 	 */
2337 	mlx4_warn(dev, "recovering from previously mis-behaved VM\n");
2338 	__raw_writel((__force u32) 0, &priv->mfunc.comm->slave_read);
2339 	__raw_writel((__force u32) 0, &priv->mfunc.comm->slave_write);
2340 	priv->cmd.comm_toggle = 0;
2341 
2342 	return 0;
2343 }
2344 
2345 int mlx4_multi_func_init(struct mlx4_dev *dev)
2346 {
2347 	struct mlx4_priv *priv = mlx4_priv(dev);
2348 	struct mlx4_slave_state *s_state;
2349 	int i, j, err, port;
2350 
2351 	if (mlx4_is_master(dev))
2352 		priv->mfunc.comm =
2353 		ioremap(pci_resource_start(dev->persist->pdev,
2354 					   priv->fw.comm_bar) +
2355 			priv->fw.comm_base, MLX4_COMM_PAGESIZE);
2356 	else
2357 		priv->mfunc.comm =
2358 		ioremap(pci_resource_start(dev->persist->pdev, 2) +
2359 			MLX4_SLAVE_COMM_BASE, MLX4_COMM_PAGESIZE);
2360 	if (!priv->mfunc.comm) {
2361 		mlx4_err(dev, "Couldn't map communication vector\n");
2362 		goto err_vhcr;
2363 	}
2364 
2365 	if (mlx4_is_master(dev)) {
2366 		struct mlx4_vf_oper_state *vf_oper;
2367 		struct mlx4_vf_admin_state *vf_admin;
2368 
2369 		priv->mfunc.master.slave_state =
2370 			kcalloc(dev->num_slaves,
2371 				sizeof(struct mlx4_slave_state),
2372 				GFP_KERNEL);
2373 		if (!priv->mfunc.master.slave_state)
2374 			goto err_comm;
2375 
2376 		priv->mfunc.master.vf_admin =
2377 			kcalloc(dev->num_slaves,
2378 				sizeof(struct mlx4_vf_admin_state),
2379 				GFP_KERNEL);
2380 		if (!priv->mfunc.master.vf_admin)
2381 			goto err_comm_admin;
2382 
2383 		priv->mfunc.master.vf_oper =
2384 			kcalloc(dev->num_slaves,
2385 				sizeof(struct mlx4_vf_oper_state),
2386 				GFP_KERNEL);
2387 		if (!priv->mfunc.master.vf_oper)
2388 			goto err_comm_oper;
2389 
2390 		priv->mfunc.master.next_slave = 0;
2391 
2392 		for (i = 0; i < dev->num_slaves; ++i) {
2393 			vf_admin = &priv->mfunc.master.vf_admin[i];
2394 			vf_oper = &priv->mfunc.master.vf_oper[i];
2395 			s_state = &priv->mfunc.master.slave_state[i];
2396 			s_state->last_cmd = MLX4_COMM_CMD_RESET;
2397 			s_state->vst_qinq_supported = false;
2398 			mutex_init(&priv->mfunc.master.gen_eqe_mutex[i]);
2399 			for (j = 0; j < MLX4_EVENT_TYPES_NUM; ++j)
2400 				s_state->event_eq[j].eqn = -1;
2401 			__raw_writel((__force u32) 0,
2402 				     &priv->mfunc.comm[i].slave_write);
2403 			__raw_writel((__force u32) 0,
2404 				     &priv->mfunc.comm[i].slave_read);
2405 			for (port = 1; port <= MLX4_MAX_PORTS; port++) {
2406 				struct mlx4_vport_state *admin_vport;
2407 				struct mlx4_vport_state *oper_vport;
2408 
2409 				s_state->vlan_filter[port] =
2410 					kzalloc(sizeof(struct mlx4_vlan_fltr),
2411 						GFP_KERNEL);
2412 				if (!s_state->vlan_filter[port]) {
2413 					if (--port)
2414 						kfree(s_state->vlan_filter[port]);
2415 					goto err_slaves;
2416 				}
2417 
2418 				admin_vport = &vf_admin->vport[port];
2419 				oper_vport = &vf_oper->vport[port].state;
2420 				INIT_LIST_HEAD(&s_state->mcast_filters[port]);
2421 				admin_vport->default_vlan = MLX4_VGT;
2422 				oper_vport->default_vlan = MLX4_VGT;
2423 				admin_vport->qos_vport =
2424 						MLX4_VPP_DEFAULT_VPORT;
2425 				oper_vport->qos_vport = MLX4_VPP_DEFAULT_VPORT;
2426 				admin_vport->vlan_proto = htons(ETH_P_8021Q);
2427 				oper_vport->vlan_proto = htons(ETH_P_8021Q);
2428 				vf_oper->vport[port].vlan_idx = NO_INDX;
2429 				vf_oper->vport[port].mac_idx = NO_INDX;
2430 				mlx4_set_random_admin_guid(dev, i, port);
2431 			}
2432 			spin_lock_init(&s_state->lock);
2433 		}
2434 
2435 		if (dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_QOS_VPP) {
2436 			for (port = 1; port <= dev->caps.num_ports; port++) {
2437 				if (mlx4_is_eth(dev, port)) {
2438 					mlx4_set_default_port_qos(dev, port);
2439 					mlx4_allocate_port_vpps(dev, port);
2440 				}
2441 			}
2442 		}
2443 
2444 		memset(&priv->mfunc.master.cmd_eqe, 0, sizeof(struct mlx4_eqe));
2445 		priv->mfunc.master.cmd_eqe.type = MLX4_EVENT_TYPE_CMD;
2446 		INIT_WORK(&priv->mfunc.master.comm_work,
2447 			  mlx4_master_comm_channel);
2448 		INIT_WORK(&priv->mfunc.master.slave_event_work,
2449 			  mlx4_gen_slave_eqe);
2450 		INIT_WORK(&priv->mfunc.master.slave_flr_event_work,
2451 			  mlx4_master_handle_slave_flr);
2452 		spin_lock_init(&priv->mfunc.master.slave_state_lock);
2453 		spin_lock_init(&priv->mfunc.master.slave_eq.event_lock);
2454 		priv->mfunc.master.comm_wq =
2455 			create_singlethread_workqueue("mlx4_comm");
2456 		if (!priv->mfunc.master.comm_wq)
2457 			goto err_slaves;
2458 
2459 		if (mlx4_init_resource_tracker(dev))
2460 			goto err_thread;
2461 
2462 	} else {
2463 		err = sync_toggles(dev);
2464 		if (err) {
2465 			mlx4_err(dev, "Couldn't sync toggles\n");
2466 			goto err_comm;
2467 		}
2468 	}
2469 	return 0;
2470 
2471 err_thread:
2472 	destroy_workqueue(priv->mfunc.master.comm_wq);
2473 err_slaves:
2474 	while (i--) {
2475 		for (port = 1; port <= MLX4_MAX_PORTS; port++)
2476 			kfree(priv->mfunc.master.slave_state[i].vlan_filter[port]);
2477 	}
2478 	kfree(priv->mfunc.master.vf_oper);
2479 err_comm_oper:
2480 	kfree(priv->mfunc.master.vf_admin);
2481 err_comm_admin:
2482 	kfree(priv->mfunc.master.slave_state);
2483 err_comm:
2484 	iounmap(priv->mfunc.comm);
2485 	priv->mfunc.comm = NULL;
2486 err_vhcr:
2487 	dma_free_coherent(&dev->persist->pdev->dev, PAGE_SIZE,
2488 			  priv->mfunc.vhcr,
2489 			  priv->mfunc.vhcr_dma);
2490 	priv->mfunc.vhcr = NULL;
2491 	return -ENOMEM;
2492 }
2493 
2494 int mlx4_cmd_init(struct mlx4_dev *dev)
2495 {
2496 	struct mlx4_priv *priv = mlx4_priv(dev);
2497 	int flags = 0;
2498 
2499 	if (!priv->cmd.initialized) {
2500 		init_rwsem(&priv->cmd.switch_sem);
2501 		mutex_init(&priv->cmd.slave_cmd_mutex);
2502 		sema_init(&priv->cmd.poll_sem, 1);
2503 		priv->cmd.use_events = 0;
2504 		priv->cmd.toggle     = 1;
2505 		priv->cmd.initialized = 1;
2506 		flags |= MLX4_CMD_CLEANUP_STRUCT;
2507 	}
2508 
2509 	if (!mlx4_is_slave(dev) && !priv->cmd.hcr) {
2510 		priv->cmd.hcr = ioremap(pci_resource_start(dev->persist->pdev,
2511 					0) + MLX4_HCR_BASE, MLX4_HCR_SIZE);
2512 		if (!priv->cmd.hcr) {
2513 			mlx4_err(dev, "Couldn't map command register\n");
2514 			goto err;
2515 		}
2516 		flags |= MLX4_CMD_CLEANUP_HCR;
2517 	}
2518 
2519 	if (mlx4_is_mfunc(dev) && !priv->mfunc.vhcr) {
2520 		priv->mfunc.vhcr = dma_alloc_coherent(&dev->persist->pdev->dev,
2521 						      PAGE_SIZE,
2522 						      &priv->mfunc.vhcr_dma,
2523 						      GFP_KERNEL);
2524 		if (!priv->mfunc.vhcr)
2525 			goto err;
2526 
2527 		flags |= MLX4_CMD_CLEANUP_VHCR;
2528 	}
2529 
2530 	if (!priv->cmd.pool) {
2531 		priv->cmd.pool = dma_pool_create("mlx4_cmd",
2532 						 &dev->persist->pdev->dev,
2533 						 MLX4_MAILBOX_SIZE,
2534 						 MLX4_MAILBOX_SIZE, 0);
2535 		if (!priv->cmd.pool)
2536 			goto err;
2537 
2538 		flags |= MLX4_CMD_CLEANUP_POOL;
2539 	}
2540 
2541 	return 0;
2542 
2543 err:
2544 	mlx4_cmd_cleanup(dev, flags);
2545 	return -ENOMEM;
2546 }
2547 
2548 void mlx4_report_internal_err_comm_event(struct mlx4_dev *dev)
2549 {
2550 	struct mlx4_priv *priv = mlx4_priv(dev);
2551 	int slave;
2552 	u32 slave_read;
2553 
2554 	/* If the comm channel has not yet been initialized,
2555 	 * skip reporting the internal error event to all
2556 	 * the communication channels.
2557 	 */
2558 	if (!priv->mfunc.comm)
2559 		return;
2560 
2561 	/* Report an internal error event to all
2562 	 * communication channels.
2563 	 */
2564 	for (slave = 0; slave < dev->num_slaves; slave++) {
2565 		slave_read = swab32(readl(&priv->mfunc.comm[slave].slave_read));
2566 		slave_read |= (u32)COMM_CHAN_EVENT_INTERNAL_ERR;
2567 		__raw_writel((__force u32)cpu_to_be32(slave_read),
2568 			     &priv->mfunc.comm[slave].slave_read);
2569 	}
2570 }
2571 
2572 void mlx4_multi_func_cleanup(struct mlx4_dev *dev)
2573 {
2574 	struct mlx4_priv *priv = mlx4_priv(dev);
2575 	int i, port;
2576 
2577 	if (mlx4_is_master(dev)) {
2578 		destroy_workqueue(priv->mfunc.master.comm_wq);
2579 		for (i = 0; i < dev->num_slaves; i++) {
2580 			for (port = 1; port <= MLX4_MAX_PORTS; port++)
2581 				kfree(priv->mfunc.master.slave_state[i].vlan_filter[port]);
2582 		}
2583 		kfree(priv->mfunc.master.slave_state);
2584 		kfree(priv->mfunc.master.vf_admin);
2585 		kfree(priv->mfunc.master.vf_oper);
2586 		dev->num_slaves = 0;
2587 	}
2588 
2589 	iounmap(priv->mfunc.comm);
2590 	priv->mfunc.comm = NULL;
2591 }
2592 
2593 void mlx4_cmd_cleanup(struct mlx4_dev *dev, int cleanup_mask)
2594 {
2595 	struct mlx4_priv *priv = mlx4_priv(dev);
2596 
2597 	if (priv->cmd.pool && (cleanup_mask & MLX4_CMD_CLEANUP_POOL)) {
2598 		dma_pool_destroy(priv->cmd.pool);
2599 		priv->cmd.pool = NULL;
2600 	}
2601 
2602 	if (!mlx4_is_slave(dev) && priv->cmd.hcr &&
2603 	    (cleanup_mask & MLX4_CMD_CLEANUP_HCR)) {
2604 		iounmap(priv->cmd.hcr);
2605 		priv->cmd.hcr = NULL;
2606 	}
2607 	if (mlx4_is_mfunc(dev) && priv->mfunc.vhcr &&
2608 	    (cleanup_mask & MLX4_CMD_CLEANUP_VHCR)) {
2609 		dma_free_coherent(&dev->persist->pdev->dev, PAGE_SIZE,
2610 				  priv->mfunc.vhcr, priv->mfunc.vhcr_dma);
2611 		priv->mfunc.vhcr = NULL;
2612 	}
2613 	if (priv->cmd.initialized && (cleanup_mask & MLX4_CMD_CLEANUP_STRUCT))
2614 		priv->cmd.initialized = 0;
2615 }
2616 
2617 /*
2618  * Switch to using events to issue FW commands (can only be called
2619  * after event queue for command events has been initialized).
2620  */
2621 int mlx4_cmd_use_events(struct mlx4_dev *dev)
2622 {
2623 	struct mlx4_priv *priv = mlx4_priv(dev);
2624 	int i;
2625 	int err = 0;
2626 
2627 	priv->cmd.context = kmalloc_array(priv->cmd.max_cmds,
2628 					  sizeof(struct mlx4_cmd_context),
2629 					  GFP_KERNEL);
2630 	if (!priv->cmd.context)
2631 		return -ENOMEM;
2632 
2633 	if (mlx4_is_mfunc(dev))
2634 		mutex_lock(&priv->cmd.slave_cmd_mutex);
2635 	down_write(&priv->cmd.switch_sem);
2636 	for (i = 0; i < priv->cmd.max_cmds; ++i) {
2637 		priv->cmd.context[i].token = i;
2638 		priv->cmd.context[i].next  = i + 1;
2639 		/* To support fatal error flow, initialize all
2640 		 * cmd contexts to allow simulating completions
2641 		 * with complete() at any time.
2642 		 */
2643 		init_completion(&priv->cmd.context[i].done);
2644 	}
2645 
2646 	priv->cmd.context[priv->cmd.max_cmds - 1].next = -1;
2647 	priv->cmd.free_head = 0;
2648 
2649 	sema_init(&priv->cmd.event_sem, priv->cmd.max_cmds);
2650 
2651 	for (priv->cmd.token_mask = 1;
2652 	     priv->cmd.token_mask < priv->cmd.max_cmds;
2653 	     priv->cmd.token_mask <<= 1)
2654 		; /* nothing */
2655 	--priv->cmd.token_mask;
2656 
2657 	down(&priv->cmd.poll_sem);
2658 	priv->cmd.use_events = 1;
2659 	up_write(&priv->cmd.switch_sem);
2660 	if (mlx4_is_mfunc(dev))
2661 		mutex_unlock(&priv->cmd.slave_cmd_mutex);
2662 
2663 	return err;
2664 }
2665 
2666 /*
2667  * Switch back to polling (used when shutting down the device)
2668  */
2669 void mlx4_cmd_use_polling(struct mlx4_dev *dev)
2670 {
2671 	struct mlx4_priv *priv = mlx4_priv(dev);
2672 	int i;
2673 
2674 	if (mlx4_is_mfunc(dev))
2675 		mutex_lock(&priv->cmd.slave_cmd_mutex);
2676 	down_write(&priv->cmd.switch_sem);
2677 	priv->cmd.use_events = 0;
2678 
2679 	for (i = 0; i < priv->cmd.max_cmds; ++i)
2680 		down(&priv->cmd.event_sem);
2681 
2682 	kfree(priv->cmd.context);
2683 	priv->cmd.context = NULL;
2684 
2685 	up(&priv->cmd.poll_sem);
2686 	up_write(&priv->cmd.switch_sem);
2687 	if (mlx4_is_mfunc(dev))
2688 		mutex_unlock(&priv->cmd.slave_cmd_mutex);
2689 }
2690 
2691 struct mlx4_cmd_mailbox *mlx4_alloc_cmd_mailbox(struct mlx4_dev *dev)
2692 {
2693 	struct mlx4_cmd_mailbox *mailbox;
2694 
2695 	mailbox = kmalloc(sizeof(*mailbox), GFP_KERNEL);
2696 	if (!mailbox)
2697 		return ERR_PTR(-ENOMEM);
2698 
2699 	mailbox->buf = dma_pool_zalloc(mlx4_priv(dev)->cmd.pool, GFP_KERNEL,
2700 				       &mailbox->dma);
2701 	if (!mailbox->buf) {
2702 		kfree(mailbox);
2703 		return ERR_PTR(-ENOMEM);
2704 	}
2705 
2706 	return mailbox;
2707 }
2708 EXPORT_SYMBOL_GPL(mlx4_alloc_cmd_mailbox);
2709 
2710 void mlx4_free_cmd_mailbox(struct mlx4_dev *dev,
2711 			   struct mlx4_cmd_mailbox *mailbox)
2712 {
2713 	if (!mailbox)
2714 		return;
2715 
2716 	dma_pool_free(mlx4_priv(dev)->cmd.pool, mailbox->buf, mailbox->dma);
2717 	kfree(mailbox);
2718 }
2719 EXPORT_SYMBOL_GPL(mlx4_free_cmd_mailbox);
2720 
2721 u32 mlx4_comm_get_version(void)
2722 {
2723 	 return ((u32) CMD_CHAN_IF_REV << 8) | (u32) CMD_CHAN_VER;
2724 }
2725 
2726 static int mlx4_get_slave_indx(struct mlx4_dev *dev, int vf)
2727 {
2728 	if ((vf < 0) || (vf >= dev->persist->num_vfs)) {
2729 		mlx4_err(dev, "Bad vf number:%d (number of activated vf: %d)\n",
2730 			 vf, dev->persist->num_vfs);
2731 		return -EINVAL;
2732 	}
2733 
2734 	return vf+1;
2735 }
2736 
2737 int mlx4_get_vf_indx(struct mlx4_dev *dev, int slave)
2738 {
2739 	if (slave < 1 || slave > dev->persist->num_vfs) {
2740 		mlx4_err(dev,
2741 			 "Bad slave number:%d (number of activated slaves: %lu)\n",
2742 			 slave, dev->num_slaves);
2743 		return -EINVAL;
2744 	}
2745 	return slave - 1;
2746 }
2747 
2748 void mlx4_cmd_wake_completions(struct mlx4_dev *dev)
2749 {
2750 	struct mlx4_priv *priv = mlx4_priv(dev);
2751 	struct mlx4_cmd_context *context;
2752 	int i;
2753 
2754 	spin_lock(&priv->cmd.context_lock);
2755 	if (priv->cmd.context) {
2756 		for (i = 0; i < priv->cmd.max_cmds; ++i) {
2757 			context = &priv->cmd.context[i];
2758 			context->fw_status = CMD_STAT_INTERNAL_ERR;
2759 			context->result    =
2760 				mlx4_status_to_errno(CMD_STAT_INTERNAL_ERR);
2761 			complete(&context->done);
2762 		}
2763 	}
2764 	spin_unlock(&priv->cmd.context_lock);
2765 }
2766 
2767 struct mlx4_active_ports mlx4_get_active_ports(struct mlx4_dev *dev, int slave)
2768 {
2769 	struct mlx4_active_ports actv_ports;
2770 	int vf;
2771 
2772 	bitmap_zero(actv_ports.ports, MLX4_MAX_PORTS);
2773 
2774 	if (slave == 0) {
2775 		bitmap_fill(actv_ports.ports, dev->caps.num_ports);
2776 		return actv_ports;
2777 	}
2778 
2779 	vf = mlx4_get_vf_indx(dev, slave);
2780 	if (vf < 0)
2781 		return actv_ports;
2782 
2783 	bitmap_set(actv_ports.ports, dev->dev_vfs[vf].min_port - 1,
2784 		   min((int)dev->dev_vfs[mlx4_get_vf_indx(dev, slave)].n_ports,
2785 		   dev->caps.num_ports));
2786 
2787 	return actv_ports;
2788 }
2789 EXPORT_SYMBOL_GPL(mlx4_get_active_ports);
2790 
2791 int mlx4_slave_convert_port(struct mlx4_dev *dev, int slave, int port)
2792 {
2793 	unsigned n;
2794 	struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave);
2795 	unsigned m = bitmap_weight(actv_ports.ports, dev->caps.num_ports);
2796 
2797 	if (port <= 0 || port > m)
2798 		return -EINVAL;
2799 
2800 	n = find_first_bit(actv_ports.ports, dev->caps.num_ports);
2801 	if (port <= n)
2802 		port = n + 1;
2803 
2804 	return port;
2805 }
2806 EXPORT_SYMBOL_GPL(mlx4_slave_convert_port);
2807 
2808 int mlx4_phys_to_slave_port(struct mlx4_dev *dev, int slave, int port)
2809 {
2810 	struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave);
2811 	if (test_bit(port - 1, actv_ports.ports))
2812 		return port -
2813 			find_first_bit(actv_ports.ports, dev->caps.num_ports);
2814 
2815 	return -1;
2816 }
2817 EXPORT_SYMBOL_GPL(mlx4_phys_to_slave_port);
2818 
2819 struct mlx4_slaves_pport mlx4_phys_to_slaves_pport(struct mlx4_dev *dev,
2820 						   int port)
2821 {
2822 	unsigned i;
2823 	struct mlx4_slaves_pport slaves_pport;
2824 
2825 	bitmap_zero(slaves_pport.slaves, MLX4_MFUNC_MAX);
2826 
2827 	if (port <= 0 || port > dev->caps.num_ports)
2828 		return slaves_pport;
2829 
2830 	for (i = 0; i < dev->persist->num_vfs + 1; i++) {
2831 		struct mlx4_active_ports actv_ports =
2832 			mlx4_get_active_ports(dev, i);
2833 		if (test_bit(port - 1, actv_ports.ports))
2834 			set_bit(i, slaves_pport.slaves);
2835 	}
2836 
2837 	return slaves_pport;
2838 }
2839 EXPORT_SYMBOL_GPL(mlx4_phys_to_slaves_pport);
2840 
2841 struct mlx4_slaves_pport mlx4_phys_to_slaves_pport_actv(
2842 		struct mlx4_dev *dev,
2843 		const struct mlx4_active_ports *crit_ports)
2844 {
2845 	unsigned i;
2846 	struct mlx4_slaves_pport slaves_pport;
2847 
2848 	bitmap_zero(slaves_pport.slaves, MLX4_MFUNC_MAX);
2849 
2850 	for (i = 0; i < dev->persist->num_vfs + 1; i++) {
2851 		struct mlx4_active_ports actv_ports =
2852 			mlx4_get_active_ports(dev, i);
2853 		if (bitmap_equal(crit_ports->ports, actv_ports.ports,
2854 				 dev->caps.num_ports))
2855 			set_bit(i, slaves_pport.slaves);
2856 	}
2857 
2858 	return slaves_pport;
2859 }
2860 EXPORT_SYMBOL_GPL(mlx4_phys_to_slaves_pport_actv);
2861 
2862 static int mlx4_slaves_closest_port(struct mlx4_dev *dev, int slave, int port)
2863 {
2864 	struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave);
2865 	int min_port = find_first_bit(actv_ports.ports, dev->caps.num_ports)
2866 			+ 1;
2867 	int max_port = min_port +
2868 		bitmap_weight(actv_ports.ports, dev->caps.num_ports);
2869 
2870 	if (port < min_port)
2871 		port = min_port;
2872 	else if (port >= max_port)
2873 		port = max_port - 1;
2874 
2875 	return port;
2876 }
2877 
2878 static int mlx4_set_vport_qos(struct mlx4_priv *priv, int slave, int port,
2879 			      int max_tx_rate)
2880 {
2881 	int i;
2882 	int err;
2883 	struct mlx4_qos_manager *port_qos;
2884 	struct mlx4_dev *dev = &priv->dev;
2885 	struct mlx4_vport_qos_param vpp_qos[MLX4_NUM_UP];
2886 
2887 	port_qos = &priv->mfunc.master.qos_ctl[port];
2888 	memset(vpp_qos, 0, sizeof(struct mlx4_vport_qos_param) * MLX4_NUM_UP);
2889 
2890 	if (slave > port_qos->num_of_qos_vfs) {
2891 		mlx4_info(dev, "No available VPP resources for this VF\n");
2892 		return -EINVAL;
2893 	}
2894 
2895 	/* Query for default QoS values from Vport 0 is needed */
2896 	err = mlx4_SET_VPORT_QOS_get(dev, port, 0, vpp_qos);
2897 	if (err) {
2898 		mlx4_info(dev, "Failed to query Vport 0 QoS values\n");
2899 		return err;
2900 	}
2901 
2902 	for (i = 0; i < MLX4_NUM_UP; i++) {
2903 		if (test_bit(i, port_qos->priority_bm) && max_tx_rate) {
2904 			vpp_qos[i].max_avg_bw = max_tx_rate;
2905 			vpp_qos[i].enable = 1;
2906 		} else {
2907 			/* if user supplied tx_rate == 0, meaning no rate limit
2908 			 * configuration is required. so we are leaving the
2909 			 * value of max_avg_bw as queried from Vport 0.
2910 			 */
2911 			vpp_qos[i].enable = 0;
2912 		}
2913 	}
2914 
2915 	err = mlx4_SET_VPORT_QOS_set(dev, port, slave, vpp_qos);
2916 	if (err) {
2917 		mlx4_info(dev, "Failed to set Vport %d QoS values\n", slave);
2918 		return err;
2919 	}
2920 
2921 	return 0;
2922 }
2923 
2924 static bool mlx4_is_vf_vst_and_prio_qos(struct mlx4_dev *dev, int port,
2925 					struct mlx4_vport_state *vf_admin)
2926 {
2927 	struct mlx4_qos_manager *info;
2928 	struct mlx4_priv *priv = mlx4_priv(dev);
2929 
2930 	if (!mlx4_is_master(dev) ||
2931 	    !(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_QOS_VPP))
2932 		return false;
2933 
2934 	info = &priv->mfunc.master.qos_ctl[port];
2935 
2936 	if (vf_admin->default_vlan != MLX4_VGT &&
2937 	    test_bit(vf_admin->default_qos, info->priority_bm))
2938 		return true;
2939 
2940 	return false;
2941 }
2942 
2943 static bool mlx4_valid_vf_state_change(struct mlx4_dev *dev, int port,
2944 				       struct mlx4_vport_state *vf_admin,
2945 				       int vlan, int qos)
2946 {
2947 	struct mlx4_vport_state dummy_admin = {0};
2948 
2949 	if (!mlx4_is_vf_vst_and_prio_qos(dev, port, vf_admin) ||
2950 	    !vf_admin->tx_rate)
2951 		return true;
2952 
2953 	dummy_admin.default_qos = qos;
2954 	dummy_admin.default_vlan = vlan;
2955 
2956 	/* VF wants to move to other VST state which is valid with current
2957 	 * rate limit. Either differnt default vlan in VST or other
2958 	 * supported QoS priority. Otherwise we don't allow this change when
2959 	 * the TX rate is still configured.
2960 	 */
2961 	if (mlx4_is_vf_vst_and_prio_qos(dev, port, &dummy_admin))
2962 		return true;
2963 
2964 	mlx4_info(dev, "Cannot change VF state to %s while rate is set\n",
2965 		  (vlan == MLX4_VGT) ? "VGT" : "VST");
2966 
2967 	if (vlan != MLX4_VGT)
2968 		mlx4_info(dev, "VST priority %d not supported for QoS\n", qos);
2969 
2970 	mlx4_info(dev, "Please set rate to 0 prior to this VF state change\n");
2971 
2972 	return false;
2973 }
2974 
2975 int mlx4_set_vf_mac(struct mlx4_dev *dev, int port, int vf, u8 *mac)
2976 {
2977 	struct mlx4_priv *priv = mlx4_priv(dev);
2978 	struct mlx4_vport_state *s_info;
2979 	int slave;
2980 
2981 	if (!mlx4_is_master(dev))
2982 		return -EPROTONOSUPPORT;
2983 
2984 	if (is_multicast_ether_addr(mac))
2985 		return -EINVAL;
2986 
2987 	slave = mlx4_get_slave_indx(dev, vf);
2988 	if (slave < 0)
2989 		return -EINVAL;
2990 
2991 	port = mlx4_slaves_closest_port(dev, slave, port);
2992 	s_info = &priv->mfunc.master.vf_admin[slave].vport[port];
2993 
2994 	if (s_info->spoofchk && is_zero_ether_addr(mac)) {
2995 		mlx4_info(dev, "MAC invalidation is not allowed when spoofchk is on\n");
2996 		return -EPERM;
2997 	}
2998 
2999 	s_info->mac = ether_addr_to_u64(mac);
3000 	mlx4_info(dev, "default mac on vf %d port %d to %llX will take effect only after vf restart\n",
3001 		  vf, port, s_info->mac);
3002 	return 0;
3003 }
3004 EXPORT_SYMBOL_GPL(mlx4_set_vf_mac);
3005 
3006 
3007 int mlx4_set_vf_vlan(struct mlx4_dev *dev, int port, int vf, u16 vlan, u8 qos,
3008 		     __be16 proto)
3009 {
3010 	struct mlx4_priv *priv = mlx4_priv(dev);
3011 	struct mlx4_vport_state *vf_admin;
3012 	struct mlx4_slave_state *slave_state;
3013 	struct mlx4_vport_oper_state *vf_oper;
3014 	int slave;
3015 
3016 	if ((!mlx4_is_master(dev)) ||
3017 	    !(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_VLAN_CONTROL))
3018 		return -EPROTONOSUPPORT;
3019 
3020 	if ((vlan > 4095) || (qos > 7))
3021 		return -EINVAL;
3022 
3023 	if (proto == htons(ETH_P_8021AD) &&
3024 	    !(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SVLAN_BY_QP))
3025 		return -EPROTONOSUPPORT;
3026 
3027 	if (proto != htons(ETH_P_8021Q) &&
3028 	    proto != htons(ETH_P_8021AD))
3029 		return -EINVAL;
3030 
3031 	if ((proto == htons(ETH_P_8021AD)) &&
3032 	    ((vlan == 0) || (vlan == MLX4_VGT)))
3033 		return -EINVAL;
3034 
3035 	slave = mlx4_get_slave_indx(dev, vf);
3036 	if (slave < 0)
3037 		return -EINVAL;
3038 
3039 	slave_state = &priv->mfunc.master.slave_state[slave];
3040 	if ((proto == htons(ETH_P_8021AD)) && (slave_state->active) &&
3041 	    (!slave_state->vst_qinq_supported)) {
3042 		mlx4_err(dev, "vf %d does not support VST QinQ mode\n", vf);
3043 		return -EPROTONOSUPPORT;
3044 	}
3045 	port = mlx4_slaves_closest_port(dev, slave, port);
3046 	vf_admin = &priv->mfunc.master.vf_admin[slave].vport[port];
3047 	vf_oper = &priv->mfunc.master.vf_oper[slave].vport[port];
3048 
3049 	if (!mlx4_valid_vf_state_change(dev, port, vf_admin, vlan, qos))
3050 		return -EPERM;
3051 
3052 	if ((0 == vlan) && (0 == qos))
3053 		vf_admin->default_vlan = MLX4_VGT;
3054 	else
3055 		vf_admin->default_vlan = vlan;
3056 	vf_admin->default_qos = qos;
3057 	vf_admin->vlan_proto = proto;
3058 
3059 	/* If rate was configured prior to VST, we saved the configured rate
3060 	 * in vf_admin->rate and now, if priority supported we enforce the QoS
3061 	 */
3062 	if (mlx4_is_vf_vst_and_prio_qos(dev, port, vf_admin) &&
3063 	    vf_admin->tx_rate)
3064 		vf_admin->qos_vport = slave;
3065 
3066 	/* Try to activate new vf state without restart,
3067 	 * this option is not supported while moving to VST QinQ mode.
3068 	 */
3069 	if ((proto == htons(ETH_P_8021AD) &&
3070 	     vf_oper->state.vlan_proto != proto) ||
3071 	    mlx4_master_immediate_activate_vlan_qos(priv, slave, port))
3072 		mlx4_info(dev,
3073 			  "updating vf %d port %d config will take effect on next VF restart\n",
3074 			  vf, port);
3075 	return 0;
3076 }
3077 EXPORT_SYMBOL_GPL(mlx4_set_vf_vlan);
3078 
3079 int mlx4_set_vf_rate(struct mlx4_dev *dev, int port, int vf, int min_tx_rate,
3080 		     int max_tx_rate)
3081 {
3082 	int err;
3083 	int slave;
3084 	struct mlx4_vport_state *vf_admin;
3085 	struct mlx4_priv *priv = mlx4_priv(dev);
3086 
3087 	if (!mlx4_is_master(dev) ||
3088 	    !(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_QOS_VPP))
3089 		return -EPROTONOSUPPORT;
3090 
3091 	if (min_tx_rate) {
3092 		mlx4_info(dev, "Minimum BW share not supported\n");
3093 		return -EPROTONOSUPPORT;
3094 	}
3095 
3096 	slave = mlx4_get_slave_indx(dev, vf);
3097 	if (slave < 0)
3098 		return -EINVAL;
3099 
3100 	port = mlx4_slaves_closest_port(dev, slave, port);
3101 	vf_admin = &priv->mfunc.master.vf_admin[slave].vport[port];
3102 
3103 	err = mlx4_set_vport_qos(priv, slave, port, max_tx_rate);
3104 	if (err) {
3105 		mlx4_info(dev, "vf %d failed to set rate %d\n", vf,
3106 			  max_tx_rate);
3107 		return err;
3108 	}
3109 
3110 	vf_admin->tx_rate = max_tx_rate;
3111 	/* if VF is not in supported mode (VST with supported prio),
3112 	 * we do not change vport configuration for its QPs, but save
3113 	 * the rate, so it will be enforced when it moves to supported
3114 	 * mode next time.
3115 	 */
3116 	if (!mlx4_is_vf_vst_and_prio_qos(dev, port, vf_admin)) {
3117 		mlx4_info(dev,
3118 			  "rate set for VF %d when not in valid state\n", vf);
3119 
3120 		if (vf_admin->default_vlan != MLX4_VGT)
3121 			mlx4_info(dev, "VST priority not supported by QoS\n");
3122 		else
3123 			mlx4_info(dev, "VF in VGT mode (needed VST)\n");
3124 
3125 		mlx4_info(dev,
3126 			  "rate %d take affect when VF moves to valid state\n",
3127 			  max_tx_rate);
3128 		return 0;
3129 	}
3130 
3131 	/* If user sets rate 0 assigning default vport for its QPs */
3132 	vf_admin->qos_vport = max_tx_rate ? slave : MLX4_VPP_DEFAULT_VPORT;
3133 
3134 	if (priv->mfunc.master.slave_state[slave].active &&
3135 	    dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_UPDATE_QP)
3136 		mlx4_master_immediate_activate_vlan_qos(priv, slave, port);
3137 
3138 	return 0;
3139 }
3140 EXPORT_SYMBOL_GPL(mlx4_set_vf_rate);
3141 
3142  /* mlx4_get_slave_default_vlan -
3143  * return true if VST ( default vlan)
3144  * if VST, will return vlan & qos (if not NULL)
3145  */
3146 bool mlx4_get_slave_default_vlan(struct mlx4_dev *dev, int port, int slave,
3147 				 u16 *vlan, u8 *qos)
3148 {
3149 	struct mlx4_vport_oper_state *vp_oper;
3150 	struct mlx4_priv *priv;
3151 
3152 	priv = mlx4_priv(dev);
3153 	port = mlx4_slaves_closest_port(dev, slave, port);
3154 	vp_oper = &priv->mfunc.master.vf_oper[slave].vport[port];
3155 
3156 	if (MLX4_VGT != vp_oper->state.default_vlan) {
3157 		if (vlan)
3158 			*vlan = vp_oper->state.default_vlan;
3159 		if (qos)
3160 			*qos = vp_oper->state.default_qos;
3161 		return true;
3162 	}
3163 	return false;
3164 }
3165 EXPORT_SYMBOL_GPL(mlx4_get_slave_default_vlan);
3166 
3167 int mlx4_set_vf_spoofchk(struct mlx4_dev *dev, int port, int vf, bool setting)
3168 {
3169 	struct mlx4_priv *priv = mlx4_priv(dev);
3170 	struct mlx4_vport_state *s_info;
3171 	int slave;
3172 	u8 mac[ETH_ALEN];
3173 
3174 	if ((!mlx4_is_master(dev)) ||
3175 	    !(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_FSM))
3176 		return -EPROTONOSUPPORT;
3177 
3178 	slave = mlx4_get_slave_indx(dev, vf);
3179 	if (slave < 0)
3180 		return -EINVAL;
3181 
3182 	port = mlx4_slaves_closest_port(dev, slave, port);
3183 	s_info = &priv->mfunc.master.vf_admin[slave].vport[port];
3184 
3185 	u64_to_ether_addr(s_info->mac, mac);
3186 	if (setting && !is_valid_ether_addr(mac)) {
3187 		mlx4_info(dev, "Illegal MAC with spoofchk\n");
3188 		return -EPERM;
3189 	}
3190 
3191 	s_info->spoofchk = setting;
3192 
3193 	return 0;
3194 }
3195 EXPORT_SYMBOL_GPL(mlx4_set_vf_spoofchk);
3196 
3197 int mlx4_get_vf_config(struct mlx4_dev *dev, int port, int vf, struct ifla_vf_info *ivf)
3198 {
3199 	struct mlx4_priv *priv = mlx4_priv(dev);
3200 	struct mlx4_vport_state *s_info;
3201 	int slave;
3202 
3203 	if (!mlx4_is_master(dev))
3204 		return -EPROTONOSUPPORT;
3205 
3206 	slave = mlx4_get_slave_indx(dev, vf);
3207 	if (slave < 0)
3208 		return -EINVAL;
3209 
3210 	s_info = &priv->mfunc.master.vf_admin[slave].vport[port];
3211 	ivf->vf = vf;
3212 
3213 	/* need to convert it to a func */
3214 	ivf->mac[0] = ((s_info->mac >> (5*8)) & 0xff);
3215 	ivf->mac[1] = ((s_info->mac >> (4*8)) & 0xff);
3216 	ivf->mac[2] = ((s_info->mac >> (3*8)) & 0xff);
3217 	ivf->mac[3] = ((s_info->mac >> (2*8)) & 0xff);
3218 	ivf->mac[4] = ((s_info->mac >> (1*8)) & 0xff);
3219 	ivf->mac[5] = ((s_info->mac)  & 0xff);
3220 
3221 	ivf->vlan		= s_info->default_vlan;
3222 	ivf->qos		= s_info->default_qos;
3223 	ivf->vlan_proto		= s_info->vlan_proto;
3224 
3225 	if (mlx4_is_vf_vst_and_prio_qos(dev, port, s_info))
3226 		ivf->max_tx_rate = s_info->tx_rate;
3227 	else
3228 		ivf->max_tx_rate = 0;
3229 
3230 	ivf->min_tx_rate	= 0;
3231 	ivf->spoofchk		= s_info->spoofchk;
3232 	ivf->linkstate		= s_info->link_state;
3233 
3234 	return 0;
3235 }
3236 EXPORT_SYMBOL_GPL(mlx4_get_vf_config);
3237 
3238 int mlx4_set_vf_link_state(struct mlx4_dev *dev, int port, int vf, int link_state)
3239 {
3240 	struct mlx4_priv *priv = mlx4_priv(dev);
3241 	struct mlx4_vport_state *s_info;
3242 	int slave;
3243 	u8 link_stat_event;
3244 
3245 	slave = mlx4_get_slave_indx(dev, vf);
3246 	if (slave < 0)
3247 		return -EINVAL;
3248 
3249 	port = mlx4_slaves_closest_port(dev, slave, port);
3250 	switch (link_state) {
3251 	case IFLA_VF_LINK_STATE_AUTO:
3252 		/* get current link state */
3253 		if (!priv->sense.do_sense_port[port])
3254 			link_stat_event = MLX4_PORT_CHANGE_SUBTYPE_ACTIVE;
3255 		else
3256 			link_stat_event = MLX4_PORT_CHANGE_SUBTYPE_DOWN;
3257 	    break;
3258 
3259 	case IFLA_VF_LINK_STATE_ENABLE:
3260 		link_stat_event = MLX4_PORT_CHANGE_SUBTYPE_ACTIVE;
3261 	    break;
3262 
3263 	case IFLA_VF_LINK_STATE_DISABLE:
3264 		link_stat_event = MLX4_PORT_CHANGE_SUBTYPE_DOWN;
3265 	    break;
3266 
3267 	default:
3268 		mlx4_warn(dev, "unknown value for link_state %02x on slave %d port %d\n",
3269 			  link_state, slave, port);
3270 		return -EINVAL;
3271 	}
3272 	s_info = &priv->mfunc.master.vf_admin[slave].vport[port];
3273 	s_info->link_state = link_state;
3274 
3275 	/* send event */
3276 	mlx4_gen_port_state_change_eqe(dev, slave, port, link_stat_event);
3277 
3278 	if (mlx4_master_immediate_activate_vlan_qos(priv, slave, port))
3279 		mlx4_dbg(dev,
3280 			 "updating vf %d port %d no link state HW enforcement\n",
3281 			 vf, port);
3282 	return 0;
3283 }
3284 EXPORT_SYMBOL_GPL(mlx4_set_vf_link_state);
3285 
3286 int mlx4_get_counter_stats(struct mlx4_dev *dev, int counter_index,
3287 			   struct mlx4_counter *counter_stats, int reset)
3288 {
3289 	struct mlx4_cmd_mailbox *mailbox = NULL;
3290 	struct mlx4_counter *tmp_counter;
3291 	int err;
3292 	u32 if_stat_in_mod;
3293 
3294 	if (!counter_stats)
3295 		return -EINVAL;
3296 
3297 	if (counter_index == MLX4_SINK_COUNTER_INDEX(dev))
3298 		return 0;
3299 
3300 	mailbox = mlx4_alloc_cmd_mailbox(dev);
3301 	if (IS_ERR(mailbox))
3302 		return PTR_ERR(mailbox);
3303 
3304 	memset(mailbox->buf, 0, sizeof(struct mlx4_counter));
3305 	if_stat_in_mod = counter_index;
3306 	if (reset)
3307 		if_stat_in_mod |= MLX4_QUERY_IF_STAT_RESET;
3308 	err = mlx4_cmd_box(dev, 0, mailbox->dma,
3309 			   if_stat_in_mod, 0,
3310 			   MLX4_CMD_QUERY_IF_STAT,
3311 			   MLX4_CMD_TIME_CLASS_C,
3312 			   MLX4_CMD_NATIVE);
3313 	if (err) {
3314 		mlx4_dbg(dev, "%s: failed to read statistics for counter index %d\n",
3315 			 __func__, counter_index);
3316 		goto if_stat_out;
3317 	}
3318 	tmp_counter = (struct mlx4_counter *)mailbox->buf;
3319 	counter_stats->counter_mode = tmp_counter->counter_mode;
3320 	if (counter_stats->counter_mode == 0) {
3321 		counter_stats->rx_frames =
3322 			cpu_to_be64(be64_to_cpu(counter_stats->rx_frames) +
3323 				    be64_to_cpu(tmp_counter->rx_frames));
3324 		counter_stats->tx_frames =
3325 			cpu_to_be64(be64_to_cpu(counter_stats->tx_frames) +
3326 				    be64_to_cpu(tmp_counter->tx_frames));
3327 		counter_stats->rx_bytes =
3328 			cpu_to_be64(be64_to_cpu(counter_stats->rx_bytes) +
3329 				    be64_to_cpu(tmp_counter->rx_bytes));
3330 		counter_stats->tx_bytes =
3331 			cpu_to_be64(be64_to_cpu(counter_stats->tx_bytes) +
3332 				    be64_to_cpu(tmp_counter->tx_bytes));
3333 	}
3334 
3335 if_stat_out:
3336 	mlx4_free_cmd_mailbox(dev, mailbox);
3337 
3338 	return err;
3339 }
3340 EXPORT_SYMBOL_GPL(mlx4_get_counter_stats);
3341 
3342 int mlx4_get_vf_stats(struct mlx4_dev *dev, int port, int vf_idx,
3343 		      struct ifla_vf_stats *vf_stats)
3344 {
3345 	struct mlx4_counter tmp_vf_stats;
3346 	int slave;
3347 	int err = 0;
3348 
3349 	if (!vf_stats)
3350 		return -EINVAL;
3351 
3352 	if (!mlx4_is_master(dev))
3353 		return -EPROTONOSUPPORT;
3354 
3355 	slave = mlx4_get_slave_indx(dev, vf_idx);
3356 	if (slave < 0)
3357 		return -EINVAL;
3358 
3359 	port = mlx4_slaves_closest_port(dev, slave, port);
3360 	err = mlx4_calc_vf_counters(dev, slave, port, &tmp_vf_stats);
3361 	if (!err && tmp_vf_stats.counter_mode == 0) {
3362 		vf_stats->rx_packets = be64_to_cpu(tmp_vf_stats.rx_frames);
3363 		vf_stats->tx_packets = be64_to_cpu(tmp_vf_stats.tx_frames);
3364 		vf_stats->rx_bytes = be64_to_cpu(tmp_vf_stats.rx_bytes);
3365 		vf_stats->tx_bytes = be64_to_cpu(tmp_vf_stats.tx_bytes);
3366 	}
3367 
3368 	return err;
3369 }
3370 EXPORT_SYMBOL_GPL(mlx4_get_vf_stats);
3371 
3372 int mlx4_vf_smi_enabled(struct mlx4_dev *dev, int slave, int port)
3373 {
3374 	struct mlx4_priv *priv = mlx4_priv(dev);
3375 
3376 	if (slave < 1 || slave >= dev->num_slaves ||
3377 	    port < 1 || port > MLX4_MAX_PORTS)
3378 		return 0;
3379 
3380 	return priv->mfunc.master.vf_oper[slave].smi_enabled[port] ==
3381 		MLX4_VF_SMI_ENABLED;
3382 }
3383 EXPORT_SYMBOL_GPL(mlx4_vf_smi_enabled);
3384 
3385 int mlx4_vf_get_enable_smi_admin(struct mlx4_dev *dev, int slave, int port)
3386 {
3387 	struct mlx4_priv *priv = mlx4_priv(dev);
3388 
3389 	if (slave == mlx4_master_func_num(dev))
3390 		return 1;
3391 
3392 	if (slave < 1 || slave >= dev->num_slaves ||
3393 	    port < 1 || port > MLX4_MAX_PORTS)
3394 		return 0;
3395 
3396 	return priv->mfunc.master.vf_admin[slave].enable_smi[port] ==
3397 		MLX4_VF_SMI_ENABLED;
3398 }
3399 EXPORT_SYMBOL_GPL(mlx4_vf_get_enable_smi_admin);
3400 
3401 int mlx4_vf_set_enable_smi_admin(struct mlx4_dev *dev, int slave, int port,
3402 				 int enabled)
3403 {
3404 	struct mlx4_priv *priv = mlx4_priv(dev);
3405 	struct mlx4_active_ports actv_ports = mlx4_get_active_ports(
3406 			&priv->dev, slave);
3407 	int min_port = find_first_bit(actv_ports.ports,
3408 				      priv->dev.caps.num_ports) + 1;
3409 	int max_port = min_port - 1 +
3410 		bitmap_weight(actv_ports.ports, priv->dev.caps.num_ports);
3411 
3412 	if (slave == mlx4_master_func_num(dev))
3413 		return 0;
3414 
3415 	if (slave < 1 || slave >= dev->num_slaves ||
3416 	    port < 1 || port > MLX4_MAX_PORTS ||
3417 	    enabled < 0 || enabled > 1)
3418 		return -EINVAL;
3419 
3420 	if (min_port == max_port && dev->caps.num_ports > 1) {
3421 		mlx4_info(dev, "SMI access disallowed for single ported VFs\n");
3422 		return -EPROTONOSUPPORT;
3423 	}
3424 
3425 	priv->mfunc.master.vf_admin[slave].enable_smi[port] = enabled;
3426 	return 0;
3427 }
3428 EXPORT_SYMBOL_GPL(mlx4_vf_set_enable_smi_admin);
3429