1/*-
2 *   BSD LICENSE
3 *
4 *   Copyright (c) Intel Corporation. All rights reserved.
5 *   Copyright (c) 2017, Western Digital Corporation or its affiliates.
6 *
7 *   Redistribution and use in source and binary forms, with or without
8 *   modification, are permitted provided that the following conditions
9 *   are met:
10 *
11 *     * Redistributions of source code must retain the above copyright
12 *       notice, this list of conditions and the following disclaimer.
13 *     * Redistributions in binary form must reproduce the above copyright
14 *       notice, this list of conditions and the following disclaimer in
15 *       the documentation and/or other materials provided with the
16 *       distribution.
17 *     * Neither the name of Intel Corporation nor the names of its
18 *       contributors may be used to endorse or promote products derived
19 *       from this software without specific prior written permission.
20 *
21 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#include "nvme_internal.h"
35#include "nvme_pci.h"
36
37struct nvme_quirk {
38	struct pci_id	id;
39	unsigned int	flags;
40};
41
42static const struct nvme_quirk nvme_quirks[] = {
43	{
44		{ NVME_PCI_VID_INTEL, 0x0953, NVME_PCI_VID_INTEL, 0x3702 },
45		NVME_INTEL_QUIRK_READ_LATENCY | NVME_INTEL_QUIRK_WRITE_LATENCY
46	},
47	{
48		{ NVME_PCI_VID_INTEL, 0x0953, NVME_PCI_VID_INTEL, 0x3703 },
49		NVME_INTEL_QUIRK_READ_LATENCY | NVME_INTEL_QUIRK_WRITE_LATENCY
50	},
51	{
52		{ NVME_PCI_VID_INTEL, 0x0953, NVME_PCI_VID_INTEL, 0x3704 },
53		NVME_INTEL_QUIRK_READ_LATENCY | NVME_INTEL_QUIRK_WRITE_LATENCY
54	},
55	{
56		{ NVME_PCI_VID_INTEL, 0x0953, NVME_PCI_VID_INTEL, 0x3705 },
57		NVME_INTEL_QUIRK_READ_LATENCY | NVME_INTEL_QUIRK_WRITE_LATENCY
58	},
59	{
60		{ NVME_PCI_VID_INTEL, 0x0953, NVME_PCI_VID_INTEL, 0x3709 },
61		NVME_INTEL_QUIRK_READ_LATENCY | NVME_INTEL_QUIRK_WRITE_LATENCY
62	},
63	{
64		{ NVME_PCI_VID_INTEL, 0x0953, NVME_PCI_VID_INTEL, 0x370a },
65		NVME_INTEL_QUIRK_READ_LATENCY | NVME_INTEL_QUIRK_WRITE_LATENCY
66	},
67	{
68		{ NVME_PCI_VID_MEMBLAZE, 0x0540, NVME_PCI_ANY_ID, NVME_PCI_ANY_ID },
69		NVME_QUIRK_DELAY_BEFORE_CHK_RDY
70	},
71	{
72		{ NVME_PCI_VID_INTEL, 0x0953, NVME_PCI_VID_INTEL, 0x370d },
73		NVME_QUIRK_DELAY_AFTER_RDY
74	},
75	{
76		{ 0x0000, 0x0000, 0x0000, 0x0000 },
77		0
78	}
79};
80
81/*
82 * Compare each field. NVME_PCI_ANY_ID in s1 matches everything.
83 */
84static bool nvme_quirks_pci_id_match(const struct pci_id *id,
85				     struct pci_device *pdev)
86{
87	if ((id->vendor_id == NVME_PCI_ANY_ID ||
88	     id->vendor_id == pdev->vendor_id) &&
89	    (id->device_id == NVME_PCI_ANY_ID ||
90	     id->device_id == pdev->device_id) &&
91	    (id->subvendor_id == NVME_PCI_ANY_ID ||
92	     id->subvendor_id == pdev->subvendor_id) &&
93	    (id->subdevice_id == NVME_PCI_ANY_ID ||
94	     id->subdevice_id == pdev->subdevice_id))
95		return true;
96
97	return false;
98}
99
100unsigned int nvme_ctrlr_get_quirks(struct pci_device *pdev)
101{
102	const struct nvme_quirk *quirk = nvme_quirks;
103
104	while (quirk->id.vendor_id) {
105		if (nvme_quirks_pci_id_match(&quirk->id, pdev))
106			return quirk->flags;
107		quirk++;
108	}
109
110	return 0;
111}
112