xref: /illumos-gate/usr/src/uts/common/io/ixgbe/ixgbe_osdep.c (revision 74b989c3047109458504db6bc5b1caec29c43ff3)
1 /*
2  * CDDL HEADER START
3  *
4  * Copyright(c) 2007-2009 Intel Corporation. All rights reserved.
5  * The contents of this file are subject to the terms of the
6  * Common Development and Distribution License (the "License").
7  * You may not use this file except in compliance with the License.
8  *
9  * You can obtain a copy of the license at:
10  *      http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When using or redistributing this file, you may do so under the
15  * License only. No other modification of this header is permitted.
16  *
17  * If applicable, add the following below this CDDL HEADER, with the
18  * fields enclosed by brackets "[]" replaced with your own identifying
19  * information: Portions Copyright [yyyy] [name of copyright owner]
20  *
21  * CDDL HEADER END
22  */
23 
24 /*
25  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
26  * Use is subject to license terms.
27  * Copyright (c) 2017, Joyent, Inc.
28  */
29 
30 #include "ixgbe_sw.h"
31 
32 uint16_t
ixgbe_read_pci_cfg(struct ixgbe_hw * hw,uint32_t reg)33 ixgbe_read_pci_cfg(struct ixgbe_hw *hw, uint32_t reg)
34 {
35 	return (pci_config_get16(OS_DEP(hw)->cfg_handle, reg));
36 }
37 
38 void
ixgbe_write_pci_cfg(struct ixgbe_hw * hw,uint32_t reg,uint32_t val)39 ixgbe_write_pci_cfg(struct ixgbe_hw *hw, uint32_t reg, uint32_t val)
40 {
41 	pci_config_put16(OS_DEP(hw)->cfg_handle, reg, val);
42 }
43 
44 /*
45  * This is our last line of defense against a hardware device that has decided
46  * to somehow disappear without our knowledge of it. To try and deal with this,
47  * we'll read the status register and see if it returns all 1s, indicating an
48  * invalid read. Note the status register is defined to have bits in all current
49  * revisions that are hardwired to zero.
50  */
51 boolean_t
ixgbe_removed(struct ixgbe_hw * hw)52 ixgbe_removed(struct ixgbe_hw *hw)
53 {
54 	uint32_t val;
55 
56 	val = IXGBE_READ_REG(hw, IXGBE_STATUS);
57 	if (val == PCI_EINVAL32) {
58 		ixgbe_t *ixgbe = OS_DEP(hw)->ixgbe;
59 
60 		ixgbe_error(ixgbe, "failed to read status register: device "
61 		    "may be gone");
62 		if (ixgbe->ixgbe_ks != NULL) {
63 			ixgbe_stat_t *s = ixgbe->ixgbe_ks->ks_data;
64 			s->dev_gone.value.ui64++;
65 		}
66 		return (B_TRUE);
67 	}
68 	return (B_FALSE);
69 }
70