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/param.h>
27 #include <sys/systm.h>
28 #include <sys/buf.h>
29 #include <sys/bus.h>
30 #include <sys/conf.h>
31 #include <sys/proc.h>
32 #include <sys/smp.h>
33
34 #include "nvme_private.h"
35
36 static int nvme_ahci_probe(device_t dev);
37 static int nvme_ahci_attach(device_t dev);
38 static int nvme_ahci_detach(device_t dev);
39
40 static device_method_t nvme_ahci_methods[] = {
41 /* Device interface */
42 DEVMETHOD(device_probe, nvme_ahci_probe),
43 DEVMETHOD(device_attach, nvme_ahci_attach),
44 DEVMETHOD(device_detach, nvme_ahci_detach),
45 DEVMETHOD(device_shutdown, nvme_shutdown),
46 { 0, 0 }
47 };
48
49 static driver_t nvme_ahci_driver = {
50 "nvme",
51 nvme_ahci_methods,
52 sizeof(struct nvme_controller),
53 };
54
55 DRIVER_MODULE(nvme, ahci, nvme_ahci_driver, NULL, NULL);
56
57 static int
nvme_ahci_probe(device_t device)58 nvme_ahci_probe (device_t device)
59 {
60 return (0);
61 }
62
63 static int
nvme_ahci_attach(device_t dev)64 nvme_ahci_attach(device_t dev)
65 {
66 struct nvme_controller*ctrlr = DEVICE2SOFTC(dev);
67 int ret;
68
69 /* Map MMIO registers */
70 ctrlr->resource_id = 0;
71
72 ctrlr->resource = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
73 &ctrlr->resource_id, RF_ACTIVE);
74
75 if(ctrlr->resource == NULL) {
76 nvme_printf(ctrlr, "unable to allocate mem resource\n");
77 ret = ENOMEM;
78 goto bad;
79 }
80 ctrlr->bus_tag = rman_get_bustag(ctrlr->resource);
81 ctrlr->bus_handle = rman_get_bushandle(ctrlr->resource);
82 ctrlr->regs = (struct nvme_registers *)ctrlr->bus_handle;
83
84 /* Allocate and setup IRQ */
85 ctrlr->rid = 0;
86 ctrlr->res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
87 &ctrlr->rid, RF_SHAREABLE | RF_ACTIVE);
88 if (ctrlr->res == NULL) {
89 nvme_printf(ctrlr, "unable to allocate shared interrupt\n");
90 ret = ENOMEM;
91 goto bad;
92 }
93
94 ctrlr->msi_count = 0;
95 ctrlr->num_io_queues = 1;
96 if (bus_setup_intr(dev, ctrlr->res,
97 INTR_TYPE_MISC | INTR_MPSAFE, NULL, nvme_ctrlr_shared_handler,
98 ctrlr, &ctrlr->tag) != 0) {
99 nvme_printf(ctrlr, "unable to setup shared interrupt\n");
100 ret = ENOMEM;
101 goto bad;
102 }
103 ctrlr->tag = (void *)0x1;
104
105 /*
106 * We're attached via this funky mechanism. Flag the controller so that
107 * it avoids things that can't work when we do that, like asking for
108 * PCI config space entries.
109 */
110 ctrlr->quirks |= QUIRK_AHCI;
111
112 return (nvme_attach(dev)); /* Note: failure frees resources */
113 bad:
114 if (ctrlr->resource != NULL) {
115 bus_release_resource(dev, SYS_RES_MEMORY,
116 ctrlr->resource_id, ctrlr->resource);
117 }
118 if (ctrlr->res)
119 bus_release_resource(ctrlr->dev, SYS_RES_IRQ,
120 rman_get_rid(ctrlr->res), ctrlr->res);
121 return (ret);
122 }
123
124 static int
nvme_ahci_detach(device_t dev)125 nvme_ahci_detach(device_t dev)
126 {
127
128 return (nvme_detach(dev));
129 }
130