1 /*-
2 * Copyright (C) 2017 Olivier Houchard
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/buf.h>
31 #include <sys/bus.h>
32 #include <sys/conf.h>
33 #include <sys/proc.h>
34 #include <sys/smp.h>
35
36 #include "nvme_private.h"
37
38 static int nvme_ahci_probe(device_t dev);
39 static int nvme_ahci_attach(device_t dev);
40 static int nvme_ahci_detach(device_t dev);
41
42 static device_method_t nvme_ahci_methods[] = {
43 /* Device interface */
44 DEVMETHOD(device_probe, nvme_ahci_probe),
45 DEVMETHOD(device_attach, nvme_ahci_attach),
46 DEVMETHOD(device_detach, nvme_ahci_detach),
47 DEVMETHOD(device_shutdown, nvme_shutdown),
48 { 0, 0 }
49 };
50
51 static driver_t nvme_ahci_driver = {
52 "nvme",
53 nvme_ahci_methods,
54 sizeof(struct nvme_controller),
55 };
56
57 DRIVER_MODULE(nvme, ahci, nvme_ahci_driver, nvme_devclass, NULL, 0);
58
59 static int
60 nvme_ahci_probe (device_t device)
61 {
62 return (0);
63 }
64
65 static int
66 nvme_ahci_attach(device_t dev)
67 {
68 struct nvme_controller*ctrlr = DEVICE2SOFTC(dev);
69 int ret;
70
71 /* Map MMIO registers */
72 ctrlr->resource_id = 0;
73
74 ctrlr->resource = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
75 &ctrlr->resource_id, RF_ACTIVE);
76
77 if(ctrlr->resource == NULL) {
78 nvme_printf(ctrlr, "unable to allocate mem resource\n");
79 ret = ENOMEM;
80 goto bad;
81 }
82 ctrlr->bus_tag = rman_get_bustag(ctrlr->resource);
83 ctrlr->bus_handle = rman_get_bushandle(ctrlr->resource);
84 ctrlr->regs = (struct nvme_registers *)ctrlr->bus_handle;
85
86 /* Allocate and setup IRQ */
87 ctrlr->rid = 0;
88 ctrlr->res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
89 &ctrlr->rid, RF_SHAREABLE | RF_ACTIVE);
90 if (ctrlr->res == NULL) {
91 nvme_printf(ctrlr, "unable to allocate shared interrupt\n");
92 ret = ENOMEM;
93 goto bad;
94 }
95
96 ctrlr->msi_count = 0;
97 ctrlr->num_io_queues = 1;
98 if (bus_setup_intr(dev, ctrlr->res,
99 INTR_TYPE_MISC | INTR_MPSAFE, NULL, nvme_ctrlr_shared_handler,
100 ctrlr, &ctrlr->tag) != 0) {
101 nvme_printf(ctrlr, "unable to setup shared interrupt\n");
102 ret = ENOMEM;
103 goto bad;
104 }
105 ctrlr->tag = (void *)0x1;
106
107 return nvme_attach(dev);
108 bad:
109 if (ctrlr->resource != NULL) {
110 bus_release_resource(dev, SYS_RES_MEMORY,
111 ctrlr->resource_id, ctrlr->resource);
112 }
113 if (ctrlr->res)
114 bus_release_resource(ctrlr->dev, SYS_RES_IRQ,
115 rman_get_rid(ctrlr->res), ctrlr->res);
116 return (ret);
117 }
118
119 static int
120 nvme_ahci_detach(device_t dev)
121 {
122
123 return (nvme_detach(dev));
124 }
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