if_nf10bmac_fdt.c revision 270061 
1/*-
2 * Copyright (c) 2013-2014 Bjoern A. Zeeb
3 * All rights reserved.
4 *
5 * This software was developed by SRI International and the University of
6 * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-11-C-0249
7 * ("MRC2"), as part of the DARPA MRC research programme.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * This driver is modelled after atse(4).  We need to seriously reduce the
31 * per-driver code we have to write^wcopy & paste.
32 */
33
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD: stable/10/sys/dev/netfpga10g/nf10bmac/if_nf10bmac_fdt.c 270061 2014-08-16 14:30:46Z bz $");
36
37#include <sys/param.h>
38#include <sys/bus.h>
39#include <sys/kernel.h>
40#include <sys/module.h>
41#include <sys/rman.h>
42#include <sys/socket.h>
43#include <sys/systm.h>
44
45#include <machine/bus.h>
46#include <machine/resource.h>
47
48#include <net/ethernet.h>
49#include <net/if.h>
50#include <net/if_media.h>
51#include <net/if_var.h>
52
53#include <dev/fdt/fdt_common.h>
54#include <dev/ofw/openfirm.h>
55#include <dev/ofw/ofw_bus.h>
56#include <dev/ofw/ofw_bus_subr.h>
57
58#include "if_nf10bmacreg.h"
59
60static int
61nf10bmac_probe_fdt(device_t dev)
62{
63
64	if (!ofw_bus_status_okay(dev))
65		return (ENXIO);
66
67	if (ofw_bus_is_compatible(dev, "netfpag10g,nf10bmac")) {
68		device_set_desc(dev, "NetFPGA-10G Embedded CPU Ethernet Core");
69		return (BUS_PROBE_DEFAULT);
70	}
71
72	return (ENXIO);
73}
74
75static int
76nf10bmac_attach_fdt(device_t dev)
77{
78	struct nf10bmac_softc *sc;
79	int error;
80
81	sc = device_get_softc(dev);
82	sc->nf10bmac_dev = dev;
83	sc->nf10bmac_unit = device_get_unit(dev);
84
85	/*
86	 * FDT lists our resources.  For convenience we use three different
87	 * mappings.  We need to attach them in the oder specified in .dts:
88	 * LOOP (size 0x1f), TX (0x2f), RX (0x2f), INTR (0xf).
89	 */
90
91	/*
92	 * LOOP memory region (this could be a general control region).
93	 * 0x00: 32/64bit register to enable a Y-"lopback".
94	 */
95        sc->nf10bmac_ctrl_rid = 0;
96        sc->nf10bmac_ctrl_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
97            &sc->nf10bmac_ctrl_rid, RF_ACTIVE);
98        if (sc->nf10bmac_ctrl_res == NULL) {
99                device_printf(dev, "failed to map memory for CTRL region\n");
100                error = ENXIO;
101                goto err;
102        }
103        if (bootverbose)
104                device_printf(sc->nf10bmac_dev, "CTRL region at mem %p-%p\n",
105                    (void *)rman_get_start(sc->nf10bmac_ctrl_res),
106                    (void *)(rman_get_start(sc->nf10bmac_ctrl_res) +
107                    rman_get_size(sc->nf10bmac_ctrl_res)));
108
109        /*
110         * TX and TX metadata FIFO memory region.
111         * 0x00: 32/64bit FIFO data,
112	 * 0x08: 32/64bit FIFO metadata,
113         * 0x10: 32/64bit packet length.
114         */
115        sc->nf10bmac_tx_mem_rid = 1;
116        sc->nf10bmac_tx_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
117            &sc->nf10bmac_tx_mem_rid, RF_ACTIVE);
118        if (sc->nf10bmac_tx_mem_res == NULL) {
119                device_printf(dev, "failed to map memory for TX FIFO\n");
120                error = ENXIO;
121                goto err;
122        }
123        if (bootverbose)
124                device_printf(sc->nf10bmac_dev, "TX FIFO at mem %p-%p\n",
125                    (void *)rman_get_start(sc->nf10bmac_tx_mem_res),
126                    (void *)(rman_get_start(sc->nf10bmac_tx_mem_res) +
127                    rman_get_size(sc->nf10bmac_tx_mem_res)));
128
129        /*
130         * RX and RXC metadata FIFO memory region.
131         * 0x00: 32/64bit FIFO data,
132	 * 0x08: 32/64bit FIFO metadata,
133         * 0x10: 32/64bit packet length.
134         */
135        sc->nf10bmac_rx_mem_rid = 2;
136        sc->nf10bmac_rx_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
137            &sc->nf10bmac_rx_mem_rid, RF_ACTIVE);
138        if (sc->nf10bmac_rx_mem_res == NULL) {
139                device_printf(dev, "failed to map memory for RX FIFO\n");
140                error = ENXIO;
141                goto err;
142        }
143        if (bootverbose)
144                device_printf(sc->nf10bmac_dev, "RX FIFO at mem %p-%p\n",
145                    (void *)rman_get_start(sc->nf10bmac_rx_mem_res),
146                    (void *)(rman_get_start(sc->nf10bmac_rx_mem_res) +
147                    rman_get_size(sc->nf10bmac_rx_mem_res)));
148
149	/*
150	 * Interrupt handling registers.
151	 * 0x00: 32/64bit register to clear (and disable) the RX interrupt.
152	 * 0x08: 32/64bit register to enable or disable the RX interrupt.
153	 */
154        sc->nf10bmac_intr_rid = 3;
155        sc->nf10bmac_intr_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
156            &sc->nf10bmac_intr_rid, RF_ACTIVE);
157        if (sc->nf10bmac_intr_res == NULL) {
158                device_printf(dev, "failed to map memory for INTR region\n");
159                error = ENXIO;
160                goto err;
161        }
162        if (bootverbose)
163                device_printf(sc->nf10bmac_dev, "INTR region at mem %p-%p\n",
164                    (void *)rman_get_start(sc->nf10bmac_intr_res),
165                    (void *)(rman_get_start(sc->nf10bmac_intr_res) +
166                    rman_get_size(sc->nf10bmac_intr_res)));
167
168	/* (Optional) RX and TX IRQ. */
169	sc->nf10bmac_rx_irq_rid = 0;
170	sc->nf10bmac_rx_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
171	    &sc->nf10bmac_rx_irq_rid, RF_ACTIVE | RF_SHAREABLE);
172
173	error = nf10bmac_attach(dev);
174	if (error)
175		goto err;
176
177	return (0);
178
179err:
180	/* Cleanup. */
181	nf10bmac_detach_resources(dev);
182
183	return (error);
184}
185
186static device_method_t nf10bmac_methods_fdt[] = {
187	/* Device interface */
188	DEVMETHOD(device_probe,		nf10bmac_probe_fdt),
189	DEVMETHOD(device_attach,	nf10bmac_attach_fdt),
190	DEVMETHOD(device_detach,	nf10bmac_detach_dev),
191
192	DEVMETHOD_END
193};
194
195static driver_t nf10bmac_driver_fdt = {
196	"nf10bmac",
197	nf10bmac_methods_fdt,
198	sizeof(struct nf10bmac_softc)
199};
200
201DRIVER_MODULE(nf10bmac, simplebus, nf10bmac_driver_fdt, nf10bmac_devclass, 0,0);
202
203/* end */
204