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 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 	int min_port = find_first_bit(actv_ports.ports,
2005 				      priv->dev.caps.num_ports) + 1;
2006 	int max_port = min_port - 1 +
2007 		bitmap_weight(actv_ports.ports, priv->dev.caps.num_ports);
2008 
2009 	for (port = min_port; port <= max_port; port++) {
2010 		if (!test_bit(port - 1, actv_ports.ports))
2011 			continue;
2012 		priv->mfunc.master.vf_oper[slave].smi_enabled[port] =
2013 			priv->mfunc.master.vf_admin[slave].enable_smi[port];
2014 		vp_oper = &priv->mfunc.master.vf_oper[slave].vport[port];
2015 		vp_admin = &priv->mfunc.master.vf_admin[slave].vport[port];
2016 		if (vp_admin->vlan_proto != htons(ETH_P_8021AD) ||
2017 		    slave_state->vst_qinq_supported) {
2018 			vp_oper->state.vlan_proto   = vp_admin->vlan_proto;
2019 			vp_oper->state.default_vlan = vp_admin->default_vlan;
2020 			vp_oper->state.default_qos  = vp_admin->default_qos;
2021 		}
2022 		vp_oper->state.link_state = vp_admin->link_state;
2023 		vp_oper->state.mac        = vp_admin->mac;
2024 		vp_oper->state.spoofchk   = vp_admin->spoofchk;
2025 		vp_oper->state.tx_rate    = vp_admin->tx_rate;
2026 		vp_oper->state.qos_vport  = vp_admin->qos_vport;
2027 		vp_oper->state.guid       = vp_admin->guid;
2028 
2029 		if (MLX4_VGT != vp_admin->default_vlan) {
2030 			err = __mlx4_register_vlan(&priv->dev, port,
2031 						   vp_admin->default_vlan, &(vp_oper->vlan_idx));
2032 			if (err) {
2033 				vp_oper->vlan_idx = NO_INDX;
2034 				vp_oper->state.default_vlan = MLX4_VGT;
2035 				vp_oper->state.vlan_proto = htons(ETH_P_8021Q);
2036 				mlx4_warn(&priv->dev,
2037 					  "No vlan resources slave %d, port %d\n",
2038 					  slave, port);
2039 				return err;
2040 			}
2041 			mlx4_dbg(&priv->dev, "alloc vlan %d idx  %d slave %d port %d\n",
2042 				 (int)(vp_oper->state.default_vlan),
2043 				 vp_oper->vlan_idx, slave, port);
2044 		}
2045 		if (vp_admin->spoofchk) {
2046 			vp_oper->mac_idx = __mlx4_register_mac(&priv->dev,
2047 							       port,
2048 							       vp_admin->mac);
2049 			if (0 > vp_oper->mac_idx) {
2050 				err = vp_oper->mac_idx;
2051 				vp_oper->mac_idx = NO_INDX;
2052 				mlx4_warn(&priv->dev,
2053 					  "No mac resources slave %d, port %d\n",
2054 					  slave, port);
2055 				return err;
2056 			}
2057 			mlx4_dbg(&priv->dev, "alloc mac %llx idx  %d slave %d port %d\n",
2058 				 vp_oper->state.mac, vp_oper->mac_idx, slave, port);
2059 		}
2060 	}
2061 	return 0;
2062 }
2063 
2064 static void mlx4_master_deactivate_admin_state(struct mlx4_priv *priv, int slave)
2065 {
2066 	int port;
2067 	struct mlx4_vport_oper_state *vp_oper;
2068 	struct mlx4_active_ports actv_ports = mlx4_get_active_ports(
2069 			&priv->dev, slave);
2070 	int min_port = find_first_bit(actv_ports.ports,
2071 				      priv->dev.caps.num_ports) + 1;
2072 	int max_port = min_port - 1 +
2073 		bitmap_weight(actv_ports.ports, priv->dev.caps.num_ports);
2074 
2075 
2076 	for (port = min_port; port <= max_port; port++) {
2077 		if (!test_bit(port - 1, actv_ports.ports))
2078 			continue;
2079 		priv->mfunc.master.vf_oper[slave].smi_enabled[port] =
2080 			MLX4_VF_SMI_DISABLED;
2081 		vp_oper = &priv->mfunc.master.vf_oper[slave].vport[port];
2082 		if (NO_INDX != vp_oper->vlan_idx) {
2083 			__mlx4_unregister_vlan(&priv->dev,
2084 					       port, vp_oper->state.default_vlan);
2085 			vp_oper->vlan_idx = NO_INDX;
2086 		}
2087 		if (NO_INDX != vp_oper->mac_idx) {
2088 			__mlx4_unregister_mac(&priv->dev, port, vp_oper->state.mac);
2089 			vp_oper->mac_idx = NO_INDX;
2090 		}
2091 	}
2092 	return;
2093 }
2094 
2095 static void mlx4_master_do_cmd(struct mlx4_dev *dev, int slave, u8 cmd,
2096 			       u16 param, u8 toggle)
2097 {
2098 	struct mlx4_priv *priv = mlx4_priv(dev);
2099 	struct mlx4_slave_state *slave_state = priv->mfunc.master.slave_state;
2100 	u32 reply;
2101 	u8 is_going_down = 0;
2102 	int i;
2103 	unsigned long flags;
2104 
2105 	slave_state[slave].comm_toggle ^= 1;
2106 	reply = (u32) slave_state[slave].comm_toggle << 31;
2107 	if (toggle != slave_state[slave].comm_toggle) {
2108 		mlx4_warn(dev, "Incorrect toggle %d from slave %d. *** MASTER STATE COMPROMISED ***\n",
2109 			  toggle, slave);
2110 		goto reset_slave;
2111 	}
2112 	if (cmd == MLX4_COMM_CMD_RESET) {
2113 		mlx4_warn(dev, "Received reset from slave:%d\n", slave);
2114 		slave_state[slave].active = false;
2115 		slave_state[slave].old_vlan_api = false;
2116 		slave_state[slave].vst_qinq_supported = false;
2117 		mlx4_master_deactivate_admin_state(priv, slave);
2118 		for (i = 0; i < MLX4_EVENT_TYPES_NUM; ++i) {
2119 				slave_state[slave].event_eq[i].eqn = -1;
2120 				slave_state[slave].event_eq[i].token = 0;
2121 		}
2122 		/*check if we are in the middle of FLR process,
2123 		if so return "retry" status to the slave*/
2124 		if (MLX4_COMM_CMD_FLR == slave_state[slave].last_cmd)
2125 			goto inform_slave_state;
2126 
2127 		mlx4_dispatch_event(dev, MLX4_DEV_EVENT_SLAVE_SHUTDOWN, slave);
2128 
2129 		/* write the version in the event field */
2130 		reply |= mlx4_comm_get_version();
2131 
2132 		goto reset_slave;
2133 	}
2134 	/*command from slave in the middle of FLR*/
2135 	if (cmd != MLX4_COMM_CMD_RESET &&
2136 	    MLX4_COMM_CMD_FLR == slave_state[slave].last_cmd) {
2137 		mlx4_warn(dev, "slave:%d is Trying to run cmd(0x%x) in the middle of FLR\n",
2138 			  slave, cmd);
2139 		return;
2140 	}
2141 
2142 	switch (cmd) {
2143 	case MLX4_COMM_CMD_VHCR0:
2144 		if (slave_state[slave].last_cmd != MLX4_COMM_CMD_RESET)
2145 			goto reset_slave;
2146 		slave_state[slave].vhcr_dma = ((u64) param) << 48;
2147 		priv->mfunc.master.slave_state[slave].cookie = 0;
2148 		break;
2149 	case MLX4_COMM_CMD_VHCR1:
2150 		if (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR0)
2151 			goto reset_slave;
2152 		slave_state[slave].vhcr_dma |= ((u64) param) << 32;
2153 		break;
2154 	case MLX4_COMM_CMD_VHCR2:
2155 		if (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR1)
2156 			goto reset_slave;
2157 		slave_state[slave].vhcr_dma |= ((u64) param) << 16;
2158 		break;
2159 	case MLX4_COMM_CMD_VHCR_EN:
2160 		if (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR2)
2161 			goto reset_slave;
2162 		slave_state[slave].vhcr_dma |= param;
2163 		if (mlx4_master_activate_admin_state(priv, slave))
2164 				goto reset_slave;
2165 		slave_state[slave].active = true;
2166 		mlx4_dispatch_event(dev, MLX4_DEV_EVENT_SLAVE_INIT, slave);
2167 		break;
2168 	case MLX4_COMM_CMD_VHCR_POST:
2169 		if ((slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR_EN) &&
2170 		    (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR_POST)) {
2171 			mlx4_warn(dev, "slave:%d is out of sync, cmd=0x%x, last command=0x%x, reset is needed\n",
2172 				  slave, cmd, slave_state[slave].last_cmd);
2173 			goto reset_slave;
2174 		}
2175 
2176 		mutex_lock(&priv->cmd.slave_cmd_mutex);
2177 		if (mlx4_master_process_vhcr(dev, slave, NULL)) {
2178 			mlx4_err(dev, "Failed processing vhcr for slave:%d, resetting slave\n",
2179 				 slave);
2180 			mutex_unlock(&priv->cmd.slave_cmd_mutex);
2181 			goto reset_slave;
2182 		}
2183 		mutex_unlock(&priv->cmd.slave_cmd_mutex);
2184 		break;
2185 	default:
2186 		mlx4_warn(dev, "Bad comm cmd:%d from slave:%d\n", cmd, slave);
2187 		goto reset_slave;
2188 	}
2189 	spin_lock_irqsave(&priv->mfunc.master.slave_state_lock, flags);
2190 	if (!slave_state[slave].is_slave_going_down)
2191 		slave_state[slave].last_cmd = cmd;
2192 	else
2193 		is_going_down = 1;
2194 	spin_unlock_irqrestore(&priv->mfunc.master.slave_state_lock, flags);
2195 	if (is_going_down) {
2196 		mlx4_warn(dev, "Slave is going down aborting command(%d) executing from slave:%d\n",
2197 			  cmd, slave);
2198 		return;
2199 	}
2200 	__raw_writel((__force u32) cpu_to_be32(reply),
2201 		     &priv->mfunc.comm[slave].slave_read);
2202 
2203 	return;
2204 
2205 reset_slave:
2206 	/* cleanup any slave resources */
2207 	if (dev->persist->interface_state & MLX4_INTERFACE_STATE_UP)
2208 		mlx4_delete_all_resources_for_slave(dev, slave);
2209 
2210 	if (cmd != MLX4_COMM_CMD_RESET) {
2211 		mlx4_warn(dev, "Turn on internal error to force reset, slave=%d, cmd=0x%x\n",
2212 			  slave, cmd);
2213 		/* Turn on internal error letting slave reset itself immeditaly,
2214 		 * otherwise it might take till timeout on command is passed
2215 		 */
2216 		reply |= ((u32)COMM_CHAN_EVENT_INTERNAL_ERR);
2217 	}
2218 
2219 	spin_lock_irqsave(&priv->mfunc.master.slave_state_lock, flags);
2220 	if (!slave_state[slave].is_slave_going_down)
2221 		slave_state[slave].last_cmd = MLX4_COMM_CMD_RESET;
2222 	spin_unlock_irqrestore(&priv->mfunc.master.slave_state_lock, flags);
2223 	/*with slave in the middle of flr, no need to clean resources again.*/
2224 inform_slave_state:
2225 	memset(&slave_state[slave].event_eq, 0,
2226 	       sizeof(struct mlx4_slave_event_eq_info));
2227 	__raw_writel((__force u32) cpu_to_be32(reply),
2228 		     &priv->mfunc.comm[slave].slave_read);
2229 	wmb();
2230 }
2231 
2232 /* master command processing */
2233 void mlx4_master_comm_channel(struct work_struct *work)
2234 {
2235 	struct mlx4_mfunc_master_ctx *master =
2236 		container_of(work,
2237 			     struct mlx4_mfunc_master_ctx,
2238 			     comm_work);
2239 	struct mlx4_mfunc *mfunc =
2240 		container_of(master, struct mlx4_mfunc, master);
2241 	struct mlx4_priv *priv =
2242 		container_of(mfunc, struct mlx4_priv, mfunc);
2243 	struct mlx4_dev *dev = &priv->dev;
2244 	u32 lbit_vec[COMM_CHANNEL_BIT_ARRAY_SIZE];
2245 	u32 nmbr_bits;
2246 	u32 comm_cmd;
2247 	int i, slave;
2248 	int toggle;
2249 	bool first = true;
2250 	int served = 0;
2251 	int reported = 0;
2252 	u32 slt;
2253 
2254 	for (i = 0; i < COMM_CHANNEL_BIT_ARRAY_SIZE; i++)
2255 		lbit_vec[i] = be32_to_cpu(master->comm_arm_bit_vector[i]);
2256 	nmbr_bits = dev->persist->num_vfs + 1;
2257 	if (++master->next_slave >= nmbr_bits)
2258 		master->next_slave = 0;
2259 	slave = master->next_slave;
2260 	while (true) {
2261 		slave = find_next_bit((const unsigned long *)&lbit_vec, nmbr_bits, slave);
2262 		if  (!first && slave >= master->next_slave)
2263 			break;
2264 		if (slave == nmbr_bits) {
2265 			if (!first)
2266 				break;
2267 			first = false;
2268 			slave = 0;
2269 			continue;
2270 		}
2271 		++reported;
2272 		comm_cmd = swab32(readl(&mfunc->comm[slave].slave_write));
2273 		slt = swab32(readl(&mfunc->comm[slave].slave_read)) >> 31;
2274 		toggle = comm_cmd >> 31;
2275 		if (toggle != slt) {
2276 			if (master->slave_state[slave].comm_toggle
2277 			    != slt) {
2278 				pr_info("slave %d out of sync. read toggle %d, state toggle %d. Resynching.\n",
2279 					slave, slt,
2280 					master->slave_state[slave].comm_toggle);
2281 				master->slave_state[slave].comm_toggle =
2282 					slt;
2283 			}
2284 			mlx4_master_do_cmd(dev, slave,
2285 					   comm_cmd >> 16 & 0xff,
2286 					   comm_cmd & 0xffff, toggle);
2287 			++served;
2288 		}
2289 		slave++;
2290 	}
2291 
2292 	if (reported && reported != served)
2293 		mlx4_warn(dev, "Got command event with bitmask from %d slaves but %d were served\n",
2294 			  reported, served);
2295 
2296 	if (mlx4_ARM_COMM_CHANNEL(dev))
2297 		mlx4_warn(dev, "Failed to arm comm channel events\n");
2298 }
2299 
2300 static int sync_toggles(struct mlx4_dev *dev)
2301 {
2302 	struct mlx4_priv *priv = mlx4_priv(dev);
2303 	u32 wr_toggle;
2304 	u32 rd_toggle;
2305 	unsigned long end;
2306 
2307 	wr_toggle = swab32(readl(&priv->mfunc.comm->slave_write));
2308 	if (wr_toggle == 0xffffffff)
2309 		end = jiffies + msecs_to_jiffies(30000);
2310 	else
2311 		end = jiffies + msecs_to_jiffies(5000);
2312 
2313 	while (time_before(jiffies, end)) {
2314 		rd_toggle = swab32(readl(&priv->mfunc.comm->slave_read));
2315 		if (wr_toggle == 0xffffffff || rd_toggle == 0xffffffff) {
2316 			/* PCI might be offline */
2317 
2318 			/* If device removal has been requested,
2319 			 * do not continue retrying.
2320 			 */
2321 			if (dev->persist->interface_state &
2322 			    MLX4_INTERFACE_STATE_NOWAIT) {
2323 				mlx4_warn(dev,
2324 					  "communication channel is offline\n");
2325 				return -EIO;
2326 			}
2327 
2328 			msleep(100);
2329 			wr_toggle = swab32(readl(&priv->mfunc.comm->
2330 					   slave_write));
2331 			continue;
2332 		}
2333 
2334 		if (rd_toggle >> 31 == wr_toggle >> 31) {
2335 			priv->cmd.comm_toggle = rd_toggle >> 31;
2336 			return 0;
2337 		}
2338 
2339 		cond_resched();
2340 	}
2341 
2342 	/*
2343 	 * we could reach here if for example the previous VM using this
2344 	 * function misbehaved and left the channel with unsynced state. We
2345 	 * should fix this here and give this VM a chance to use a properly
2346 	 * synced channel
2347 	 */
2348 	mlx4_warn(dev, "recovering from previously mis-behaved VM\n");
2349 	__raw_writel((__force u32) 0, &priv->mfunc.comm->slave_read);
2350 	__raw_writel((__force u32) 0, &priv->mfunc.comm->slave_write);
2351 	priv->cmd.comm_toggle = 0;
2352 
2353 	return 0;
2354 }
2355 
2356 int mlx4_multi_func_init(struct mlx4_dev *dev)
2357 {
2358 	struct mlx4_priv *priv = mlx4_priv(dev);
2359 	struct mlx4_slave_state *s_state;
2360 	int i, j, err, port;
2361 
2362 	if (mlx4_is_master(dev))
2363 		priv->mfunc.comm =
2364 		ioremap(pci_resource_start(dev->persist->pdev,
2365 					   priv->fw.comm_bar) +
2366 			priv->fw.comm_base, MLX4_COMM_PAGESIZE);
2367 	else
2368 		priv->mfunc.comm =
2369 		ioremap(pci_resource_start(dev->persist->pdev, 2) +
2370 			MLX4_SLAVE_COMM_BASE, MLX4_COMM_PAGESIZE);
2371 	if (!priv->mfunc.comm) {
2372 		mlx4_err(dev, "Couldn't map communication vector\n");
2373 		goto err_vhcr;
2374 	}
2375 
2376 	if (mlx4_is_master(dev)) {
2377 		struct mlx4_vf_oper_state *vf_oper;
2378 		struct mlx4_vf_admin_state *vf_admin;
2379 
2380 		priv->mfunc.master.slave_state =
2381 			kcalloc(dev->num_slaves,
2382 				sizeof(struct mlx4_slave_state),
2383 				GFP_KERNEL);
2384 		if (!priv->mfunc.master.slave_state)
2385 			goto err_comm;
2386 
2387 		priv->mfunc.master.vf_admin =
2388 			kcalloc(dev->num_slaves,
2389 				sizeof(struct mlx4_vf_admin_state),
2390 				GFP_KERNEL);
2391 		if (!priv->mfunc.master.vf_admin)
2392 			goto err_comm_admin;
2393 
2394 		priv->mfunc.master.vf_oper =
2395 			kcalloc(dev->num_slaves,
2396 				sizeof(struct mlx4_vf_oper_state),
2397 				GFP_KERNEL);
2398 		if (!priv->mfunc.master.vf_oper)
2399 			goto err_comm_oper;
2400 
2401 		priv->mfunc.master.next_slave = 0;
2402 
2403 		for (i = 0; i < dev->num_slaves; ++i) {
2404 			vf_admin = &priv->mfunc.master.vf_admin[i];
2405 			vf_oper = &priv->mfunc.master.vf_oper[i];
2406 			s_state = &priv->mfunc.master.slave_state[i];
2407 			s_state->last_cmd = MLX4_COMM_CMD_RESET;
2408 			s_state->vst_qinq_supported = false;
2409 			mutex_init(&priv->mfunc.master.gen_eqe_mutex[i]);
2410 			for (j = 0; j < MLX4_EVENT_TYPES_NUM; ++j)
2411 				s_state->event_eq[j].eqn = -1;
2412 			__raw_writel((__force u32) 0,
2413 				     &priv->mfunc.comm[i].slave_write);
2414 			__raw_writel((__force u32) 0,
2415 				     &priv->mfunc.comm[i].slave_read);
2416 			for (port = 1; port <= MLX4_MAX_PORTS; port++) {
2417 				struct mlx4_vport_state *admin_vport;
2418 				struct mlx4_vport_state *oper_vport;
2419 
2420 				s_state->vlan_filter[port] =
2421 					kzalloc(sizeof(struct mlx4_vlan_fltr),
2422 						GFP_KERNEL);
2423 				if (!s_state->vlan_filter[port]) {
2424 					if (--port)
2425 						kfree(s_state->vlan_filter[port]);
2426 					goto err_slaves;
2427 				}
2428 
2429 				admin_vport = &vf_admin->vport[port];
2430 				oper_vport = &vf_oper->vport[port].state;
2431 				INIT_LIST_HEAD(&s_state->mcast_filters[port]);
2432 				admin_vport->default_vlan = MLX4_VGT;
2433 				oper_vport->default_vlan = MLX4_VGT;
2434 				admin_vport->qos_vport =
2435 						MLX4_VPP_DEFAULT_VPORT;
2436 				oper_vport->qos_vport = MLX4_VPP_DEFAULT_VPORT;
2437 				admin_vport->vlan_proto = htons(ETH_P_8021Q);
2438 				oper_vport->vlan_proto = htons(ETH_P_8021Q);
2439 				vf_oper->vport[port].vlan_idx = NO_INDX;
2440 				vf_oper->vport[port].mac_idx = NO_INDX;
2441 				mlx4_set_random_admin_guid(dev, i, port);
2442 			}
2443 			spin_lock_init(&s_state->lock);
2444 		}
2445 
2446 		if (dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_QOS_VPP) {
2447 			for (port = 1; port <= dev->caps.num_ports; port++) {
2448 				if (mlx4_is_eth(dev, port)) {
2449 					mlx4_set_default_port_qos(dev, port);
2450 					mlx4_allocate_port_vpps(dev, port);
2451 				}
2452 			}
2453 		}
2454 
2455 		memset(&priv->mfunc.master.cmd_eqe, 0, sizeof(struct mlx4_eqe));
2456 		priv->mfunc.master.cmd_eqe.type = MLX4_EVENT_TYPE_CMD;
2457 		INIT_WORK(&priv->mfunc.master.comm_work,
2458 			  mlx4_master_comm_channel);
2459 		INIT_WORK(&priv->mfunc.master.slave_event_work,
2460 			  mlx4_gen_slave_eqe);
2461 		INIT_WORK(&priv->mfunc.master.slave_flr_event_work,
2462 			  mlx4_master_handle_slave_flr);
2463 		spin_lock_init(&priv->mfunc.master.slave_state_lock);
2464 		spin_lock_init(&priv->mfunc.master.slave_eq.event_lock);
2465 		priv->mfunc.master.comm_wq =
2466 			create_singlethread_workqueue("mlx4_comm");
2467 		if (!priv->mfunc.master.comm_wq)
2468 			goto err_slaves;
2469 
2470 		if (mlx4_init_resource_tracker(dev))
2471 			goto err_thread;
2472 
2473 	} else {
2474 		err = sync_toggles(dev);
2475 		if (err) {
2476 			mlx4_err(dev, "Couldn't sync toggles\n");
2477 			goto err_comm;
2478 		}
2479 	}
2480 	return 0;
2481 
2482 err_thread:
2483 	flush_workqueue(priv->mfunc.master.comm_wq);
2484 	destroy_workqueue(priv->mfunc.master.comm_wq);
2485 err_slaves:
2486 	while (i--) {
2487 		for (port = 1; port <= MLX4_MAX_PORTS; port++)
2488 			kfree(priv->mfunc.master.slave_state[i].vlan_filter[port]);
2489 	}
2490 	kfree(priv->mfunc.master.vf_oper);
2491 err_comm_oper:
2492 	kfree(priv->mfunc.master.vf_admin);
2493 err_comm_admin:
2494 	kfree(priv->mfunc.master.slave_state);
2495 err_comm:
2496 	iounmap(priv->mfunc.comm);
2497 	priv->mfunc.comm = NULL;
2498 err_vhcr:
2499 	dma_free_coherent(&dev->persist->pdev->dev, PAGE_SIZE,
2500 			  priv->mfunc.vhcr,
2501 			  priv->mfunc.vhcr_dma);
2502 	priv->mfunc.vhcr = NULL;
2503 	return -ENOMEM;
2504 }
2505 
2506 int mlx4_cmd_init(struct mlx4_dev *dev)
2507 {
2508 	struct mlx4_priv *priv = mlx4_priv(dev);
2509 	int flags = 0;
2510 
2511 	if (!priv->cmd.initialized) {
2512 		init_rwsem(&priv->cmd.switch_sem);
2513 		mutex_init(&priv->cmd.slave_cmd_mutex);
2514 		sema_init(&priv->cmd.poll_sem, 1);
2515 		priv->cmd.use_events = 0;
2516 		priv->cmd.toggle     = 1;
2517 		priv->cmd.initialized = 1;
2518 		flags |= MLX4_CMD_CLEANUP_STRUCT;
2519 	}
2520 
2521 	if (!mlx4_is_slave(dev) && !priv->cmd.hcr) {
2522 		priv->cmd.hcr = ioremap(pci_resource_start(dev->persist->pdev,
2523 					0) + MLX4_HCR_BASE, MLX4_HCR_SIZE);
2524 		if (!priv->cmd.hcr) {
2525 			mlx4_err(dev, "Couldn't map command register\n");
2526 			goto err;
2527 		}
2528 		flags |= MLX4_CMD_CLEANUP_HCR;
2529 	}
2530 
2531 	if (mlx4_is_mfunc(dev) && !priv->mfunc.vhcr) {
2532 		priv->mfunc.vhcr = dma_alloc_coherent(&dev->persist->pdev->dev,
2533 						      PAGE_SIZE,
2534 						      &priv->mfunc.vhcr_dma,
2535 						      GFP_KERNEL);
2536 		if (!priv->mfunc.vhcr)
2537 			goto err;
2538 
2539 		flags |= MLX4_CMD_CLEANUP_VHCR;
2540 	}
2541 
2542 	if (!priv->cmd.pool) {
2543 		priv->cmd.pool = dma_pool_create("mlx4_cmd",
2544 						 &dev->persist->pdev->dev,
2545 						 MLX4_MAILBOX_SIZE,
2546 						 MLX4_MAILBOX_SIZE, 0);
2547 		if (!priv->cmd.pool)
2548 			goto err;
2549 
2550 		flags |= MLX4_CMD_CLEANUP_POOL;
2551 	}
2552 
2553 	return 0;
2554 
2555 err:
2556 	mlx4_cmd_cleanup(dev, flags);
2557 	return -ENOMEM;
2558 }
2559 
2560 void mlx4_report_internal_err_comm_event(struct mlx4_dev *dev)
2561 {
2562 	struct mlx4_priv *priv = mlx4_priv(dev);
2563 	int slave;
2564 	u32 slave_read;
2565 
2566 	/* If the comm channel has not yet been initialized,
2567 	 * skip reporting the internal error event to all
2568 	 * the communication channels.
2569 	 */
2570 	if (!priv->mfunc.comm)
2571 		return;
2572 
2573 	/* Report an internal error event to all
2574 	 * communication channels.
2575 	 */
2576 	for (slave = 0; slave < dev->num_slaves; slave++) {
2577 		slave_read = swab32(readl(&priv->mfunc.comm[slave].slave_read));
2578 		slave_read |= (u32)COMM_CHAN_EVENT_INTERNAL_ERR;
2579 		__raw_writel((__force u32)cpu_to_be32(slave_read),
2580 			     &priv->mfunc.comm[slave].slave_read);
2581 	}
2582 }
2583 
2584 void mlx4_multi_func_cleanup(struct mlx4_dev *dev)
2585 {
2586 	struct mlx4_priv *priv = mlx4_priv(dev);
2587 	int i, port;
2588 
2589 	if (mlx4_is_master(dev)) {
2590 		flush_workqueue(priv->mfunc.master.comm_wq);
2591 		destroy_workqueue(priv->mfunc.master.comm_wq);
2592 		for (i = 0; i < dev->num_slaves; i++) {
2593 			for (port = 1; port <= MLX4_MAX_PORTS; port++)
2594 				kfree(priv->mfunc.master.slave_state[i].vlan_filter[port]);
2595 		}
2596 		kfree(priv->mfunc.master.slave_state);
2597 		kfree(priv->mfunc.master.vf_admin);
2598 		kfree(priv->mfunc.master.vf_oper);
2599 		dev->num_slaves = 0;
2600 	}
2601 
2602 	iounmap(priv->mfunc.comm);
2603 	priv->mfunc.comm = NULL;
2604 }
2605 
2606 void mlx4_cmd_cleanup(struct mlx4_dev *dev, int cleanup_mask)
2607 {
2608 	struct mlx4_priv *priv = mlx4_priv(dev);
2609 
2610 	if (priv->cmd.pool && (cleanup_mask & MLX4_CMD_CLEANUP_POOL)) {
2611 		dma_pool_destroy(priv->cmd.pool);
2612 		priv->cmd.pool = NULL;
2613 	}
2614 
2615 	if (!mlx4_is_slave(dev) && priv->cmd.hcr &&
2616 	    (cleanup_mask & MLX4_CMD_CLEANUP_HCR)) {
2617 		iounmap(priv->cmd.hcr);
2618 		priv->cmd.hcr = NULL;
2619 	}
2620 	if (mlx4_is_mfunc(dev) && priv->mfunc.vhcr &&
2621 	    (cleanup_mask & MLX4_CMD_CLEANUP_VHCR)) {
2622 		dma_free_coherent(&dev->persist->pdev->dev, PAGE_SIZE,
2623 				  priv->mfunc.vhcr, priv->mfunc.vhcr_dma);
2624 		priv->mfunc.vhcr = NULL;
2625 	}
2626 	if (priv->cmd.initialized && (cleanup_mask & MLX4_CMD_CLEANUP_STRUCT))
2627 		priv->cmd.initialized = 0;
2628 }
2629 
2630 /*
2631  * Switch to using events to issue FW commands (can only be called
2632  * after event queue for command events has been initialized).
2633  */
2634 int mlx4_cmd_use_events(struct mlx4_dev *dev)
2635 {
2636 	struct mlx4_priv *priv = mlx4_priv(dev);
2637 	int i;
2638 	int err = 0;
2639 
2640 	priv->cmd.context = kmalloc_array(priv->cmd.max_cmds,
2641 					  sizeof(struct mlx4_cmd_context),
2642 					  GFP_KERNEL);
2643 	if (!priv->cmd.context)
2644 		return -ENOMEM;
2645 
2646 	if (mlx4_is_mfunc(dev))
2647 		mutex_lock(&priv->cmd.slave_cmd_mutex);
2648 	down_write(&priv->cmd.switch_sem);
2649 	for (i = 0; i < priv->cmd.max_cmds; ++i) {
2650 		priv->cmd.context[i].token = i;
2651 		priv->cmd.context[i].next  = i + 1;
2652 		/* To support fatal error flow, initialize all
2653 		 * cmd contexts to allow simulating completions
2654 		 * with complete() at any time.
2655 		 */
2656 		init_completion(&priv->cmd.context[i].done);
2657 	}
2658 
2659 	priv->cmd.context[priv->cmd.max_cmds - 1].next = -1;
2660 	priv->cmd.free_head = 0;
2661 
2662 	sema_init(&priv->cmd.event_sem, priv->cmd.max_cmds);
2663 
2664 	for (priv->cmd.token_mask = 1;
2665 	     priv->cmd.token_mask < priv->cmd.max_cmds;
2666 	     priv->cmd.token_mask <<= 1)
2667 		; /* nothing */
2668 	--priv->cmd.token_mask;
2669 
2670 	down(&priv->cmd.poll_sem);
2671 	priv->cmd.use_events = 1;
2672 	up_write(&priv->cmd.switch_sem);
2673 	if (mlx4_is_mfunc(dev))
2674 		mutex_unlock(&priv->cmd.slave_cmd_mutex);
2675 
2676 	return err;
2677 }
2678 
2679 /*
2680  * Switch back to polling (used when shutting down the device)
2681  */
2682 void mlx4_cmd_use_polling(struct mlx4_dev *dev)
2683 {
2684 	struct mlx4_priv *priv = mlx4_priv(dev);
2685 	int i;
2686 
2687 	if (mlx4_is_mfunc(dev))
2688 		mutex_lock(&priv->cmd.slave_cmd_mutex);
2689 	down_write(&priv->cmd.switch_sem);
2690 	priv->cmd.use_events = 0;
2691 
2692 	for (i = 0; i < priv->cmd.max_cmds; ++i)
2693 		down(&priv->cmd.event_sem);
2694 
2695 	kfree(priv->cmd.context);
2696 	priv->cmd.context = NULL;
2697 
2698 	up(&priv->cmd.poll_sem);
2699 	up_write(&priv->cmd.switch_sem);
2700 	if (mlx4_is_mfunc(dev))
2701 		mutex_unlock(&priv->cmd.slave_cmd_mutex);
2702 }
2703 
2704 struct mlx4_cmd_mailbox *mlx4_alloc_cmd_mailbox(struct mlx4_dev *dev)
2705 {
2706 	struct mlx4_cmd_mailbox *mailbox;
2707 
2708 	mailbox = kmalloc(sizeof(*mailbox), GFP_KERNEL);
2709 	if (!mailbox)
2710 		return ERR_PTR(-ENOMEM);
2711 
2712 	mailbox->buf = dma_pool_zalloc(mlx4_priv(dev)->cmd.pool, GFP_KERNEL,
2713 				       &mailbox->dma);
2714 	if (!mailbox->buf) {
2715 		kfree(mailbox);
2716 		return ERR_PTR(-ENOMEM);
2717 	}
2718 
2719 	return mailbox;
2720 }
2721 EXPORT_SYMBOL_GPL(mlx4_alloc_cmd_mailbox);
2722 
2723 void mlx4_free_cmd_mailbox(struct mlx4_dev *dev,
2724 			   struct mlx4_cmd_mailbox *mailbox)
2725 {
2726 	if (!mailbox)
2727 		return;
2728 
2729 	dma_pool_free(mlx4_priv(dev)->cmd.pool, mailbox->buf, mailbox->dma);
2730 	kfree(mailbox);
2731 }
2732 EXPORT_SYMBOL_GPL(mlx4_free_cmd_mailbox);
2733 
2734 u32 mlx4_comm_get_version(void)
2735 {
2736 	 return ((u32) CMD_CHAN_IF_REV << 8) | (u32) CMD_CHAN_VER;
2737 }
2738 
2739 static int mlx4_get_slave_indx(struct mlx4_dev *dev, int vf)
2740 {
2741 	if ((vf < 0) || (vf >= dev->persist->num_vfs)) {
2742 		mlx4_err(dev, "Bad vf number:%d (number of activated vf: %d)\n",
2743 			 vf, dev->persist->num_vfs);
2744 		return -EINVAL;
2745 	}
2746 
2747 	return vf+1;
2748 }
2749 
2750 int mlx4_get_vf_indx(struct mlx4_dev *dev, int slave)
2751 {
2752 	if (slave < 1 || slave > dev->persist->num_vfs) {
2753 		mlx4_err(dev,
2754 			 "Bad slave number:%d (number of activated slaves: %lu)\n",
2755 			 slave, dev->num_slaves);
2756 		return -EINVAL;
2757 	}
2758 	return slave - 1;
2759 }
2760 
2761 void mlx4_cmd_wake_completions(struct mlx4_dev *dev)
2762 {
2763 	struct mlx4_priv *priv = mlx4_priv(dev);
2764 	struct mlx4_cmd_context *context;
2765 	int i;
2766 
2767 	spin_lock(&priv->cmd.context_lock);
2768 	if (priv->cmd.context) {
2769 		for (i = 0; i < priv->cmd.max_cmds; ++i) {
2770 			context = &priv->cmd.context[i];
2771 			context->fw_status = CMD_STAT_INTERNAL_ERR;
2772 			context->result    =
2773 				mlx4_status_to_errno(CMD_STAT_INTERNAL_ERR);
2774 			complete(&context->done);
2775 		}
2776 	}
2777 	spin_unlock(&priv->cmd.context_lock);
2778 }
2779 
2780 struct mlx4_active_ports mlx4_get_active_ports(struct mlx4_dev *dev, int slave)
2781 {
2782 	struct mlx4_active_ports actv_ports;
2783 	int vf;
2784 
2785 	bitmap_zero(actv_ports.ports, MLX4_MAX_PORTS);
2786 
2787 	if (slave == 0) {
2788 		bitmap_fill(actv_ports.ports, dev->caps.num_ports);
2789 		return actv_ports;
2790 	}
2791 
2792 	vf = mlx4_get_vf_indx(dev, slave);
2793 	if (vf < 0)
2794 		return actv_ports;
2795 
2796 	bitmap_set(actv_ports.ports, dev->dev_vfs[vf].min_port - 1,
2797 		   min((int)dev->dev_vfs[mlx4_get_vf_indx(dev, slave)].n_ports,
2798 		   dev->caps.num_ports));
2799 
2800 	return actv_ports;
2801 }
2802 EXPORT_SYMBOL_GPL(mlx4_get_active_ports);
2803 
2804 int mlx4_slave_convert_port(struct mlx4_dev *dev, int slave, int port)
2805 {
2806 	unsigned n;
2807 	struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave);
2808 	unsigned m = bitmap_weight(actv_ports.ports, dev->caps.num_ports);
2809 
2810 	if (port <= 0 || port > m)
2811 		return -EINVAL;
2812 
2813 	n = find_first_bit(actv_ports.ports, dev->caps.num_ports);
2814 	if (port <= n)
2815 		port = n + 1;
2816 
2817 	return port;
2818 }
2819 EXPORT_SYMBOL_GPL(mlx4_slave_convert_port);
2820 
2821 int mlx4_phys_to_slave_port(struct mlx4_dev *dev, int slave, int port)
2822 {
2823 	struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave);
2824 	if (test_bit(port - 1, actv_ports.ports))
2825 		return port -
2826 			find_first_bit(actv_ports.ports, dev->caps.num_ports);
2827 
2828 	return -1;
2829 }
2830 EXPORT_SYMBOL_GPL(mlx4_phys_to_slave_port);
2831 
2832 struct mlx4_slaves_pport mlx4_phys_to_slaves_pport(struct mlx4_dev *dev,
2833 						   int port)
2834 {
2835 	unsigned i;
2836 	struct mlx4_slaves_pport slaves_pport;
2837 
2838 	bitmap_zero(slaves_pport.slaves, MLX4_MFUNC_MAX);
2839 
2840 	if (port <= 0 || port > dev->caps.num_ports)
2841 		return slaves_pport;
2842 
2843 	for (i = 0; i < dev->persist->num_vfs + 1; i++) {
2844 		struct mlx4_active_ports actv_ports =
2845 			mlx4_get_active_ports(dev, i);
2846 		if (test_bit(port - 1, actv_ports.ports))
2847 			set_bit(i, slaves_pport.slaves);
2848 	}
2849 
2850 	return slaves_pport;
2851 }
2852 EXPORT_SYMBOL_GPL(mlx4_phys_to_slaves_pport);
2853 
2854 struct mlx4_slaves_pport mlx4_phys_to_slaves_pport_actv(
2855 		struct mlx4_dev *dev,
2856 		const struct mlx4_active_ports *crit_ports)
2857 {
2858 	unsigned i;
2859 	struct mlx4_slaves_pport slaves_pport;
2860 
2861 	bitmap_zero(slaves_pport.slaves, MLX4_MFUNC_MAX);
2862 
2863 	for (i = 0; i < dev->persist->num_vfs + 1; i++) {
2864 		struct mlx4_active_ports actv_ports =
2865 			mlx4_get_active_ports(dev, i);
2866 		if (bitmap_equal(crit_ports->ports, actv_ports.ports,
2867 				 dev->caps.num_ports))
2868 			set_bit(i, slaves_pport.slaves);
2869 	}
2870 
2871 	return slaves_pport;
2872 }
2873 EXPORT_SYMBOL_GPL(mlx4_phys_to_slaves_pport_actv);
2874 
2875 static int mlx4_slaves_closest_port(struct mlx4_dev *dev, int slave, int port)
2876 {
2877 	struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave);
2878 	int min_port = find_first_bit(actv_ports.ports, dev->caps.num_ports)
2879 			+ 1;
2880 	int max_port = min_port +
2881 		bitmap_weight(actv_ports.ports, dev->caps.num_ports);
2882 
2883 	if (port < min_port)
2884 		port = min_port;
2885 	else if (port >= max_port)
2886 		port = max_port - 1;
2887 
2888 	return port;
2889 }
2890 
2891 static int mlx4_set_vport_qos(struct mlx4_priv *priv, int slave, int port,
2892 			      int max_tx_rate)
2893 {
2894 	int i;
2895 	int err;
2896 	struct mlx4_qos_manager *port_qos;
2897 	struct mlx4_dev *dev = &priv->dev;
2898 	struct mlx4_vport_qos_param vpp_qos[MLX4_NUM_UP];
2899 
2900 	port_qos = &priv->mfunc.master.qos_ctl[port];
2901 	memset(vpp_qos, 0, sizeof(struct mlx4_vport_qos_param) * MLX4_NUM_UP);
2902 
2903 	if (slave > port_qos->num_of_qos_vfs) {
2904 		mlx4_info(dev, "No available VPP resources for this VF\n");
2905 		return -EINVAL;
2906 	}
2907 
2908 	/* Query for default QoS values from Vport 0 is needed */
2909 	err = mlx4_SET_VPORT_QOS_get(dev, port, 0, vpp_qos);
2910 	if (err) {
2911 		mlx4_info(dev, "Failed to query Vport 0 QoS values\n");
2912 		return err;
2913 	}
2914 
2915 	for (i = 0; i < MLX4_NUM_UP; i++) {
2916 		if (test_bit(i, port_qos->priority_bm) && max_tx_rate) {
2917 			vpp_qos[i].max_avg_bw = max_tx_rate;
2918 			vpp_qos[i].enable = 1;
2919 		} else {
2920 			/* if user supplied tx_rate == 0, meaning no rate limit
2921 			 * configuration is required. so we are leaving the
2922 			 * value of max_avg_bw as queried from Vport 0.
2923 			 */
2924 			vpp_qos[i].enable = 0;
2925 		}
2926 	}
2927 
2928 	err = mlx4_SET_VPORT_QOS_set(dev, port, slave, vpp_qos);
2929 	if (err) {
2930 		mlx4_info(dev, "Failed to set Vport %d QoS values\n", slave);
2931 		return err;
2932 	}
2933 
2934 	return 0;
2935 }
2936 
2937 static bool mlx4_is_vf_vst_and_prio_qos(struct mlx4_dev *dev, int port,
2938 					struct mlx4_vport_state *vf_admin)
2939 {
2940 	struct mlx4_qos_manager *info;
2941 	struct mlx4_priv *priv = mlx4_priv(dev);
2942 
2943 	if (!mlx4_is_master(dev) ||
2944 	    !(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_QOS_VPP))
2945 		return false;
2946 
2947 	info = &priv->mfunc.master.qos_ctl[port];
2948 
2949 	if (vf_admin->default_vlan != MLX4_VGT &&
2950 	    test_bit(vf_admin->default_qos, info->priority_bm))
2951 		return true;
2952 
2953 	return false;
2954 }
2955 
2956 static bool mlx4_valid_vf_state_change(struct mlx4_dev *dev, int port,
2957 				       struct mlx4_vport_state *vf_admin,
2958 				       int vlan, int qos)
2959 {
2960 	struct mlx4_vport_state dummy_admin = {0};
2961 
2962 	if (!mlx4_is_vf_vst_and_prio_qos(dev, port, vf_admin) ||
2963 	    !vf_admin->tx_rate)
2964 		return true;
2965 
2966 	dummy_admin.default_qos = qos;
2967 	dummy_admin.default_vlan = vlan;
2968 
2969 	/* VF wants to move to other VST state which is valid with current
2970 	 * rate limit. Either differnt default vlan in VST or other
2971 	 * supported QoS priority. Otherwise we don't allow this change when
2972 	 * the TX rate is still configured.
2973 	 */
2974 	if (mlx4_is_vf_vst_and_prio_qos(dev, port, &dummy_admin))
2975 		return true;
2976 
2977 	mlx4_info(dev, "Cannot change VF state to %s while rate is set\n",
2978 		  (vlan == MLX4_VGT) ? "VGT" : "VST");
2979 
2980 	if (vlan != MLX4_VGT)
2981 		mlx4_info(dev, "VST priority %d not supported for QoS\n", qos);
2982 
2983 	mlx4_info(dev, "Please set rate to 0 prior to this VF state change\n");
2984 
2985 	return false;
2986 }
2987 
2988 int mlx4_set_vf_mac(struct mlx4_dev *dev, int port, int vf, u8 *mac)
2989 {
2990 	struct mlx4_priv *priv = mlx4_priv(dev);
2991 	struct mlx4_vport_state *s_info;
2992 	int slave;
2993 
2994 	if (!mlx4_is_master(dev))
2995 		return -EPROTONOSUPPORT;
2996 
2997 	if (is_multicast_ether_addr(mac))
2998 		return -EINVAL;
2999 
3000 	slave = mlx4_get_slave_indx(dev, vf);
3001 	if (slave < 0)
3002 		return -EINVAL;
3003 
3004 	port = mlx4_slaves_closest_port(dev, slave, port);
3005 	s_info = &priv->mfunc.master.vf_admin[slave].vport[port];
3006 
3007 	if (s_info->spoofchk && is_zero_ether_addr(mac)) {
3008 		mlx4_info(dev, "MAC invalidation is not allowed when spoofchk is on\n");
3009 		return -EPERM;
3010 	}
3011 
3012 	s_info->mac = mlx4_mac_to_u64(mac);
3013 	mlx4_info(dev, "default mac on vf %d port %d to %llX will take effect only after vf restart\n",
3014 		  vf, port, s_info->mac);
3015 	return 0;
3016 }
3017 EXPORT_SYMBOL_GPL(mlx4_set_vf_mac);
3018 
3019 
3020 int mlx4_set_vf_vlan(struct mlx4_dev *dev, int port, int vf, u16 vlan, u8 qos,
3021 		     __be16 proto)
3022 {
3023 	struct mlx4_priv *priv = mlx4_priv(dev);
3024 	struct mlx4_vport_state *vf_admin;
3025 	struct mlx4_slave_state *slave_state;
3026 	struct mlx4_vport_oper_state *vf_oper;
3027 	int slave;
3028 
3029 	if ((!mlx4_is_master(dev)) ||
3030 	    !(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_VLAN_CONTROL))
3031 		return -EPROTONOSUPPORT;
3032 
3033 	if ((vlan > 4095) || (qos > 7))
3034 		return -EINVAL;
3035 
3036 	if (proto == htons(ETH_P_8021AD) &&
3037 	    !(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SVLAN_BY_QP))
3038 		return -EPROTONOSUPPORT;
3039 
3040 	if (proto != htons(ETH_P_8021Q) &&
3041 	    proto != htons(ETH_P_8021AD))
3042 		return -EINVAL;
3043 
3044 	if ((proto == htons(ETH_P_8021AD)) &&
3045 	    ((vlan == 0) || (vlan == MLX4_VGT)))
3046 		return -EINVAL;
3047 
3048 	slave = mlx4_get_slave_indx(dev, vf);
3049 	if (slave < 0)
3050 		return -EINVAL;
3051 
3052 	slave_state = &priv->mfunc.master.slave_state[slave];
3053 	if ((proto == htons(ETH_P_8021AD)) && (slave_state->active) &&
3054 	    (!slave_state->vst_qinq_supported)) {
3055 		mlx4_err(dev, "vf %d does not support VST QinQ mode\n", vf);
3056 		return -EPROTONOSUPPORT;
3057 	}
3058 	port = mlx4_slaves_closest_port(dev, slave, port);
3059 	vf_admin = &priv->mfunc.master.vf_admin[slave].vport[port];
3060 	vf_oper = &priv->mfunc.master.vf_oper[slave].vport[port];
3061 
3062 	if (!mlx4_valid_vf_state_change(dev, port, vf_admin, vlan, qos))
3063 		return -EPERM;
3064 
3065 	if ((0 == vlan) && (0 == qos))
3066 		vf_admin->default_vlan = MLX4_VGT;
3067 	else
3068 		vf_admin->default_vlan = vlan;
3069 	vf_admin->default_qos = qos;
3070 	vf_admin->vlan_proto = proto;
3071 
3072 	/* If rate was configured prior to VST, we saved the configured rate
3073 	 * in vf_admin->rate and now, if priority supported we enforce the QoS
3074 	 */
3075 	if (mlx4_is_vf_vst_and_prio_qos(dev, port, vf_admin) &&
3076 	    vf_admin->tx_rate)
3077 		vf_admin->qos_vport = slave;
3078 
3079 	/* Try to activate new vf state without restart,
3080 	 * this option is not supported while moving to VST QinQ mode.
3081 	 */
3082 	if ((proto == htons(ETH_P_8021AD) &&
3083 	     vf_oper->state.vlan_proto != proto) ||
3084 	    mlx4_master_immediate_activate_vlan_qos(priv, slave, port))
3085 		mlx4_info(dev,
3086 			  "updating vf %d port %d config will take effect on next VF restart\n",
3087 			  vf, port);
3088 	return 0;
3089 }
3090 EXPORT_SYMBOL_GPL(mlx4_set_vf_vlan);
3091 
3092 int mlx4_set_vf_rate(struct mlx4_dev *dev, int port, int vf, int min_tx_rate,
3093 		     int max_tx_rate)
3094 {
3095 	int err;
3096 	int slave;
3097 	struct mlx4_vport_state *vf_admin;
3098 	struct mlx4_priv *priv = mlx4_priv(dev);
3099 
3100 	if (!mlx4_is_master(dev) ||
3101 	    !(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_QOS_VPP))
3102 		return -EPROTONOSUPPORT;
3103 
3104 	if (min_tx_rate) {
3105 		mlx4_info(dev, "Minimum BW share not supported\n");
3106 		return -EPROTONOSUPPORT;
3107 	}
3108 
3109 	slave = mlx4_get_slave_indx(dev, vf);
3110 	if (slave < 0)
3111 		return -EINVAL;
3112 
3113 	port = mlx4_slaves_closest_port(dev, slave, port);
3114 	vf_admin = &priv->mfunc.master.vf_admin[slave].vport[port];
3115 
3116 	err = mlx4_set_vport_qos(priv, slave, port, max_tx_rate);
3117 	if (err) {
3118 		mlx4_info(dev, "vf %d failed to set rate %d\n", vf,
3119 			  max_tx_rate);
3120 		return err;
3121 	}
3122 
3123 	vf_admin->tx_rate = max_tx_rate;
3124 	/* if VF is not in supported mode (VST with supported prio),
3125 	 * we do not change vport configuration for its QPs, but save
3126 	 * the rate, so it will be enforced when it moves to supported
3127 	 * mode next time.
3128 	 */
3129 	if (!mlx4_is_vf_vst_and_prio_qos(dev, port, vf_admin)) {
3130 		mlx4_info(dev,
3131 			  "rate set for VF %d when not in valid state\n", vf);
3132 
3133 		if (vf_admin->default_vlan != MLX4_VGT)
3134 			mlx4_info(dev, "VST priority not supported by QoS\n");
3135 		else
3136 			mlx4_info(dev, "VF in VGT mode (needed VST)\n");
3137 
3138 		mlx4_info(dev,
3139 			  "rate %d take affect when VF moves to valid state\n",
3140 			  max_tx_rate);
3141 		return 0;
3142 	}
3143 
3144 	/* If user sets rate 0 assigning default vport for its QPs */
3145 	vf_admin->qos_vport = max_tx_rate ? slave : MLX4_VPP_DEFAULT_VPORT;
3146 
3147 	if (priv->mfunc.master.slave_state[slave].active &&
3148 	    dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_UPDATE_QP)
3149 		mlx4_master_immediate_activate_vlan_qos(priv, slave, port);
3150 
3151 	return 0;
3152 }
3153 EXPORT_SYMBOL_GPL(mlx4_set_vf_rate);
3154 
3155  /* mlx4_get_slave_default_vlan -
3156  * return true if VST ( default vlan)
3157  * if VST, will return vlan & qos (if not NULL)
3158  */
3159 bool mlx4_get_slave_default_vlan(struct mlx4_dev *dev, int port, int slave,
3160 				 u16 *vlan, u8 *qos)
3161 {
3162 	struct mlx4_vport_oper_state *vp_oper;
3163 	struct mlx4_priv *priv;
3164 
3165 	priv = mlx4_priv(dev);
3166 	port = mlx4_slaves_closest_port(dev, slave, port);
3167 	vp_oper = &priv->mfunc.master.vf_oper[slave].vport[port];
3168 
3169 	if (MLX4_VGT != vp_oper->state.default_vlan) {
3170 		if (vlan)
3171 			*vlan = vp_oper->state.default_vlan;
3172 		if (qos)
3173 			*qos = vp_oper->state.default_qos;
3174 		return true;
3175 	}
3176 	return false;
3177 }
3178 EXPORT_SYMBOL_GPL(mlx4_get_slave_default_vlan);
3179 
3180 int mlx4_set_vf_spoofchk(struct mlx4_dev *dev, int port, int vf, bool setting)
3181 {
3182 	struct mlx4_priv *priv = mlx4_priv(dev);
3183 	struct mlx4_vport_state *s_info;
3184 	int slave;
3185 	u8 mac[ETH_ALEN];
3186 
3187 	if ((!mlx4_is_master(dev)) ||
3188 	    !(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_FSM))
3189 		return -EPROTONOSUPPORT;
3190 
3191 	slave = mlx4_get_slave_indx(dev, vf);
3192 	if (slave < 0)
3193 		return -EINVAL;
3194 
3195 	port = mlx4_slaves_closest_port(dev, slave, port);
3196 	s_info = &priv->mfunc.master.vf_admin[slave].vport[port];
3197 
3198 	mlx4_u64_to_mac(mac, s_info->mac);
3199 	if (setting && !is_valid_ether_addr(mac)) {
3200 		mlx4_info(dev, "Illegal MAC with spoofchk\n");
3201 		return -EPERM;
3202 	}
3203 
3204 	s_info->spoofchk = setting;
3205 
3206 	return 0;
3207 }
3208 EXPORT_SYMBOL_GPL(mlx4_set_vf_spoofchk);
3209 
3210 int mlx4_get_vf_config(struct mlx4_dev *dev, int port, int vf, struct ifla_vf_info *ivf)
3211 {
3212 	struct mlx4_priv *priv = mlx4_priv(dev);
3213 	struct mlx4_vport_state *s_info;
3214 	int slave;
3215 
3216 	if (!mlx4_is_master(dev))
3217 		return -EPROTONOSUPPORT;
3218 
3219 	slave = mlx4_get_slave_indx(dev, vf);
3220 	if (slave < 0)
3221 		return -EINVAL;
3222 
3223 	s_info = &priv->mfunc.master.vf_admin[slave].vport[port];
3224 	ivf->vf = vf;
3225 
3226 	/* need to convert it to a func */
3227 	ivf->mac[0] = ((s_info->mac >> (5*8)) & 0xff);
3228 	ivf->mac[1] = ((s_info->mac >> (4*8)) & 0xff);
3229 	ivf->mac[2] = ((s_info->mac >> (3*8)) & 0xff);
3230 	ivf->mac[3] = ((s_info->mac >> (2*8)) & 0xff);
3231 	ivf->mac[4] = ((s_info->mac >> (1*8)) & 0xff);
3232 	ivf->mac[5] = ((s_info->mac)  & 0xff);
3233 
3234 	ivf->vlan		= s_info->default_vlan;
3235 	ivf->qos		= s_info->default_qos;
3236 	ivf->vlan_proto		= s_info->vlan_proto;
3237 
3238 	if (mlx4_is_vf_vst_and_prio_qos(dev, port, s_info))
3239 		ivf->max_tx_rate = s_info->tx_rate;
3240 	else
3241 		ivf->max_tx_rate = 0;
3242 
3243 	ivf->min_tx_rate	= 0;
3244 	ivf->spoofchk		= s_info->spoofchk;
3245 	ivf->linkstate		= s_info->link_state;
3246 
3247 	return 0;
3248 }
3249 EXPORT_SYMBOL_GPL(mlx4_get_vf_config);
3250 
3251 int mlx4_set_vf_link_state(struct mlx4_dev *dev, int port, int vf, int link_state)
3252 {
3253 	struct mlx4_priv *priv = mlx4_priv(dev);
3254 	struct mlx4_vport_state *s_info;
3255 	int slave;
3256 	u8 link_stat_event;
3257 
3258 	slave = mlx4_get_slave_indx(dev, vf);
3259 	if (slave < 0)
3260 		return -EINVAL;
3261 
3262 	port = mlx4_slaves_closest_port(dev, slave, port);
3263 	switch (link_state) {
3264 	case IFLA_VF_LINK_STATE_AUTO:
3265 		/* get current link state */
3266 		if (!priv->sense.do_sense_port[port])
3267 			link_stat_event = MLX4_PORT_CHANGE_SUBTYPE_ACTIVE;
3268 		else
3269 			link_stat_event = MLX4_PORT_CHANGE_SUBTYPE_DOWN;
3270 	    break;
3271 
3272 	case IFLA_VF_LINK_STATE_ENABLE:
3273 		link_stat_event = MLX4_PORT_CHANGE_SUBTYPE_ACTIVE;
3274 	    break;
3275 
3276 	case IFLA_VF_LINK_STATE_DISABLE:
3277 		link_stat_event = MLX4_PORT_CHANGE_SUBTYPE_DOWN;
3278 	    break;
3279 
3280 	default:
3281 		mlx4_warn(dev, "unknown value for link_state %02x on slave %d port %d\n",
3282 			  link_state, slave, port);
3283 		return -EINVAL;
3284 	}
3285 	s_info = &priv->mfunc.master.vf_admin[slave].vport[port];
3286 	s_info->link_state = link_state;
3287 
3288 	/* send event */
3289 	mlx4_gen_port_state_change_eqe(dev, slave, port, link_stat_event);
3290 
3291 	if (mlx4_master_immediate_activate_vlan_qos(priv, slave, port))
3292 		mlx4_dbg(dev,
3293 			 "updating vf %d port %d no link state HW enforcement\n",
3294 			 vf, port);
3295 	return 0;
3296 }
3297 EXPORT_SYMBOL_GPL(mlx4_set_vf_link_state);
3298 
3299 int mlx4_get_counter_stats(struct mlx4_dev *dev, int counter_index,
3300 			   struct mlx4_counter *counter_stats, int reset)
3301 {
3302 	struct mlx4_cmd_mailbox *mailbox = NULL;
3303 	struct mlx4_counter *tmp_counter;
3304 	int err;
3305 	u32 if_stat_in_mod;
3306 
3307 	if (!counter_stats)
3308 		return -EINVAL;
3309 
3310 	if (counter_index == MLX4_SINK_COUNTER_INDEX(dev))
3311 		return 0;
3312 
3313 	mailbox = mlx4_alloc_cmd_mailbox(dev);
3314 	if (IS_ERR(mailbox))
3315 		return PTR_ERR(mailbox);
3316 
3317 	memset(mailbox->buf, 0, sizeof(struct mlx4_counter));
3318 	if_stat_in_mod = counter_index;
3319 	if (reset)
3320 		if_stat_in_mod |= MLX4_QUERY_IF_STAT_RESET;
3321 	err = mlx4_cmd_box(dev, 0, mailbox->dma,
3322 			   if_stat_in_mod, 0,
3323 			   MLX4_CMD_QUERY_IF_STAT,
3324 			   MLX4_CMD_TIME_CLASS_C,
3325 			   MLX4_CMD_NATIVE);
3326 	if (err) {
3327 		mlx4_dbg(dev, "%s: failed to read statistics for counter index %d\n",
3328 			 __func__, counter_index);
3329 		goto if_stat_out;
3330 	}
3331 	tmp_counter = (struct mlx4_counter *)mailbox->buf;
3332 	counter_stats->counter_mode = tmp_counter->counter_mode;
3333 	if (counter_stats->counter_mode == 0) {
3334 		counter_stats->rx_frames =
3335 			cpu_to_be64(be64_to_cpu(counter_stats->rx_frames) +
3336 				    be64_to_cpu(tmp_counter->rx_frames));
3337 		counter_stats->tx_frames =
3338 			cpu_to_be64(be64_to_cpu(counter_stats->tx_frames) +
3339 				    be64_to_cpu(tmp_counter->tx_frames));
3340 		counter_stats->rx_bytes =
3341 			cpu_to_be64(be64_to_cpu(counter_stats->rx_bytes) +
3342 				    be64_to_cpu(tmp_counter->rx_bytes));
3343 		counter_stats->tx_bytes =
3344 			cpu_to_be64(be64_to_cpu(counter_stats->tx_bytes) +
3345 				    be64_to_cpu(tmp_counter->tx_bytes));
3346 	}
3347 
3348 if_stat_out:
3349 	mlx4_free_cmd_mailbox(dev, mailbox);
3350 
3351 	return err;
3352 }
3353 EXPORT_SYMBOL_GPL(mlx4_get_counter_stats);
3354 
3355 int mlx4_get_vf_stats(struct mlx4_dev *dev, int port, int vf_idx,
3356 		      struct ifla_vf_stats *vf_stats)
3357 {
3358 	struct mlx4_counter tmp_vf_stats;
3359 	int slave;
3360 	int err = 0;
3361 
3362 	if (!vf_stats)
3363 		return -EINVAL;
3364 
3365 	if (!mlx4_is_master(dev))
3366 		return -EPROTONOSUPPORT;
3367 
3368 	slave = mlx4_get_slave_indx(dev, vf_idx);
3369 	if (slave < 0)
3370 		return -EINVAL;
3371 
3372 	port = mlx4_slaves_closest_port(dev, slave, port);
3373 	err = mlx4_calc_vf_counters(dev, slave, port, &tmp_vf_stats);
3374 	if (!err && tmp_vf_stats.counter_mode == 0) {
3375 		vf_stats->rx_packets = be64_to_cpu(tmp_vf_stats.rx_frames);
3376 		vf_stats->tx_packets = be64_to_cpu(tmp_vf_stats.tx_frames);
3377 		vf_stats->rx_bytes = be64_to_cpu(tmp_vf_stats.rx_bytes);
3378 		vf_stats->tx_bytes = be64_to_cpu(tmp_vf_stats.tx_bytes);
3379 	}
3380 
3381 	return err;
3382 }
3383 EXPORT_SYMBOL_GPL(mlx4_get_vf_stats);
3384 
3385 int mlx4_vf_smi_enabled(struct mlx4_dev *dev, int slave, int port)
3386 {
3387 	struct mlx4_priv *priv = mlx4_priv(dev);
3388 
3389 	if (slave < 1 || slave >= dev->num_slaves ||
3390 	    port < 1 || port > MLX4_MAX_PORTS)
3391 		return 0;
3392 
3393 	return priv->mfunc.master.vf_oper[slave].smi_enabled[port] ==
3394 		MLX4_VF_SMI_ENABLED;
3395 }
3396 EXPORT_SYMBOL_GPL(mlx4_vf_smi_enabled);
3397 
3398 int mlx4_vf_get_enable_smi_admin(struct mlx4_dev *dev, int slave, int port)
3399 {
3400 	struct mlx4_priv *priv = mlx4_priv(dev);
3401 
3402 	if (slave == mlx4_master_func_num(dev))
3403 		return 1;
3404 
3405 	if (slave < 1 || slave >= dev->num_slaves ||
3406 	    port < 1 || port > MLX4_MAX_PORTS)
3407 		return 0;
3408 
3409 	return priv->mfunc.master.vf_admin[slave].enable_smi[port] ==
3410 		MLX4_VF_SMI_ENABLED;
3411 }
3412 EXPORT_SYMBOL_GPL(mlx4_vf_get_enable_smi_admin);
3413 
3414 int mlx4_vf_set_enable_smi_admin(struct mlx4_dev *dev, int slave, int port,
3415 				 int enabled)
3416 {
3417 	struct mlx4_priv *priv = mlx4_priv(dev);
3418 	struct mlx4_active_ports actv_ports = mlx4_get_active_ports(
3419 			&priv->dev, slave);
3420 	int min_port = find_first_bit(actv_ports.ports,
3421 				      priv->dev.caps.num_ports) + 1;
3422 	int max_port = min_port - 1 +
3423 		bitmap_weight(actv_ports.ports, priv->dev.caps.num_ports);
3424 
3425 	if (slave == mlx4_master_func_num(dev))
3426 		return 0;
3427 
3428 	if (slave < 1 || slave >= dev->num_slaves ||
3429 	    port < 1 || port > MLX4_MAX_PORTS ||
3430 	    enabled < 0 || enabled > 1)
3431 		return -EINVAL;
3432 
3433 	if (min_port == max_port && dev->caps.num_ports > 1) {
3434 		mlx4_info(dev, "SMI access disallowed for single ported VFs\n");
3435 		return -EPROTONOSUPPORT;
3436 	}
3437 
3438 	priv->mfunc.master.vf_admin[slave].enable_smi[port] = enabled;
3439 	return 0;
3440 }
3441 EXPORT_SYMBOL_GPL(mlx4_vf_set_enable_smi_admin);
3442