1 /*-
2 * Copyright (c) 2012 Semihalf.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include "opt_platform.h"
28
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/kernel.h>
32 #include <sys/bus.h>
33 #include <sys/lock.h>
34 #include <sys/module.h>
35 #include <sys/mutex.h>
36 #include <sys/proc.h>
37 #include <sys/pcpu.h>
38 #include <sys/sched.h>
39
40 #include <machine/bus.h>
41 #include <machine/tlb.h>
42
43 #include <dev/ofw/ofw_bus.h>
44 #include <dev/ofw/ofw_bus_subr.h>
45
46 #include <powerpc/mpc85xx/mpc85xx.h>
47
48 #include "bman.h"
49 #include "portals.h"
50
51 t_Handle bman_portal_setup(struct bman_softc *);
52
53 struct dpaa_portals_softc *bp_sc;
54
55 int
bman_portals_attach(device_t dev)56 bman_portals_attach(device_t dev)
57 {
58 struct dpaa_portals_softc *sc;
59
60 sc = bp_sc = device_get_softc(dev);
61
62 /* Map bman portal to physical address space */
63 if (law_enable(OCP85XX_TGTIF_BMAN, sc->sc_dp_pa, sc->sc_dp_size)) {
64 bman_portals_detach(dev);
65 return (ENXIO);
66 }
67 /* Set portal properties for XX_VirtToPhys() */
68 XX_PortalSetInfo(dev);
69
70 bus_attach_children(dev);
71 return (0);
72 }
73
74 int
bman_portals_detach(device_t dev)75 bman_portals_detach(device_t dev)
76 {
77 struct dpaa_portals_softc *sc;
78 int i;
79
80 bp_sc = NULL;
81 sc = device_get_softc(dev);
82
83 for (i = 0; i < ARRAY_SIZE(sc->sc_dp); i++) {
84 if (sc->sc_dp[i].dp_ph != NULL) {
85 thread_lock(curthread);
86 sched_bind(curthread, i);
87 thread_unlock(curthread);
88
89 BM_PORTAL_Free(sc->sc_dp[i].dp_ph);
90
91 thread_lock(curthread);
92 sched_unbind(curthread);
93 thread_unlock(curthread);
94 }
95
96 if (sc->sc_dp[i].dp_ires != NULL) {
97 XX_DeallocIntr((uintptr_t)sc->sc_dp[i].dp_ires);
98 bus_release_resource(dev, SYS_RES_IRQ,
99 sc->sc_dp[i].dp_irid, sc->sc_dp[i].dp_ires);
100 }
101 }
102 for (i = 0; i < ARRAY_SIZE(sc->sc_rres); i++) {
103 if (sc->sc_rres[i] != NULL)
104 bus_release_resource(dev, SYS_RES_MEMORY,
105 sc->sc_rrid[i],
106 sc->sc_rres[i]);
107 }
108
109 return (0);
110 }
111
112 t_Handle
bman_portal_setup(struct bman_softc * bsc)113 bman_portal_setup(struct bman_softc *bsc)
114 {
115 struct dpaa_portals_softc *sc;
116 t_BmPortalParam bpp;
117 t_Handle portal;
118 unsigned int cpu;
119 uintptr_t p;
120
121 /* Return NULL if we're not ready or while detach */
122 if (bp_sc == NULL)
123 return (NULL);
124
125 sc = bp_sc;
126
127 sched_pin();
128 portal = NULL;
129 cpu = PCPU_GET(cpuid);
130
131 /* Check if portal is ready */
132 while (atomic_cmpset_acq_ptr((uintptr_t *)&sc->sc_dp[cpu].dp_ph,
133 0, -1) == 0) {
134 p = atomic_load_acq_ptr((uintptr_t *)&sc->sc_dp[cpu].dp_ph);
135
136 /* Return if portal is already initialized */
137 if (p != 0 && p != -1) {
138 sched_unpin();
139 return ((t_Handle)p);
140 }
141
142 /* Not inititialized and "owned" by another thread */
143 sched_relinquish(curthread);
144 }
145
146 /* Map portal registers */
147 dpaa_portal_map_registers(sc);
148
149 /* Configure and initialize portal */
150 bpp.ceBaseAddress = rman_get_bushandle(sc->sc_rres[0]);
151 bpp.ciBaseAddress = rman_get_bushandle(sc->sc_rres[1]);
152 bpp.h_Bm = bsc->sc_bh;
153 bpp.swPortalId = cpu;
154 bpp.irq = (uintptr_t)sc->sc_dp[cpu].dp_ires;
155
156 portal = BM_PORTAL_Config(&bpp);
157 if (portal == NULL)
158 goto err;
159
160 if (BM_PORTAL_Init(portal) != E_OK)
161 goto err;
162
163 atomic_store_rel_ptr((uintptr_t *)&sc->sc_dp[cpu].dp_ph, (uintptr_t)portal);
164
165 sched_unpin();
166
167 return (portal);
168
169 err:
170 if (portal != NULL)
171 BM_PORTAL_Free(portal);
172
173 atomic_store_rel_ptr((uintptr_t *)&sc->sc_dp[cpu].dp_ph, 0);
174 sched_unpin();
175
176 return (NULL);
177 }
178