2 * Copyright (c) 2011 Nathan Whitehorn
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/module.h>
34 #include <sys/kernel.h>
36 #include <dev/ofw/openfirm.h>
37 #include <dev/ofw/ofw_pci.h>
38 #include <dev/ofw/ofw_bus.h>
39 #include <dev/ofw/ofw_bus_subr.h>
41 #include <dev/pci/pcivar.h>
42 #include <dev/pci/pcireg.h>
44 #include <machine/bus.h>
45 #include <machine/intr_machdep.h>
46 #include <machine/md_var.h>
47 #include <machine/pio.h>
48 #include <machine/resource.h>
49 #include <machine/rtas.h>
56 #include <powerpc/ofw/ofw_pci.h>
57 #include <powerpc/pseries/plpar_iommu.h>
65 static int rtaspci_probe(device_t);
66 static int rtaspci_attach(device_t);
71 static u_int32_t rtaspci_read_config(device_t, u_int, u_int, u_int,
73 static void rtaspci_write_config(device_t, u_int, u_int, u_int,
74 u_int, u_int32_t, int);
77 * IOMMU LPAR interface
79 static bus_dma_tag_t rtaspci_get_dma_tag(device_t dev, device_t child);
84 static device_method_t rtaspci_methods[] = {
85 /* Device interface */
86 DEVMETHOD(device_probe, rtaspci_probe),
87 DEVMETHOD(device_attach, rtaspci_attach),
90 DEVMETHOD(pcib_read_config, rtaspci_read_config),
91 DEVMETHOD(pcib_write_config, rtaspci_write_config),
94 DEVMETHOD(bus_get_dma_tag, rtaspci_get_dma_tag),
96 DEVMETHOD(iommu_map, phyp_iommu_map),
97 DEVMETHOD(iommu_unmap, phyp_iommu_unmap),
103 struct rtaspci_softc {
104 struct ofw_pci_softc pci_sc;
105 bus_dma_tag_t dma_tag;
107 cell_t read_pci_config, write_pci_config;
108 cell_t ex_read_pci_config, ex_write_pci_config;
109 int sc_extended_config;
112 static devclass_t rtaspci_devclass;
113 DEFINE_CLASS_1(pcib, rtaspci_driver, rtaspci_methods,
114 sizeof(struct rtaspci_softc), ofw_pci_driver);
115 DRIVER_MODULE(rtaspci, nexus, rtaspci_driver, rtaspci_devclass, 0, 0);
118 rtaspci_probe(device_t dev)
125 type = ofw_bus_get_type(dev);
127 if (OF_getproplen(ofw_bus_get_node(dev), "used-by-rtas") < 0)
129 if (type == NULL || strcmp(type, "pci") != 0)
132 device_set_desc(dev, "RTAS Host-PCI bridge");
133 return (BUS_PROBE_GENERIC);
137 rtaspci_attach(device_t dev)
139 struct rtaspci_softc *sc;
141 sc = device_get_softc(dev);
143 sc->read_pci_config = rtas_token_lookup("read-pci-config");
144 sc->write_pci_config = rtas_token_lookup("write-pci-config");
145 sc->ex_read_pci_config = rtas_token_lookup("ibm,read-pci-config");
146 sc->ex_write_pci_config = rtas_token_lookup("ibm,write-pci-config");
148 sc->sc_extended_config = 0;
149 OF_getprop(ofw_bus_get_node(dev), "ibm,pci-config-space-type",
150 &sc->sc_extended_config, sizeof(sc->sc_extended_config));
152 bus_dma_tag_create(bus_get_dma_tag(dev),
153 1, 0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
154 NULL, NULL, BUS_SPACE_MAXSIZE, BUS_SPACE_UNRESTRICTED,
155 BUS_SPACE_MAXSIZE, 0, NULL, NULL, &sc->dma_tag);
157 if (!(mfmsr() & PSL_HV))
158 phyp_iommu_set_dma_tag(dev, dev, sc->dma_tag);
161 return (ofw_pci_attach(dev));
165 rtaspci_read_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg,
168 struct rtaspci_softc *sc;
169 uint32_t retval = 0xffffffff;
170 uint32_t config_addr;
173 sc = device_get_softc(dev);
175 config_addr = ((bus & 0xff) << 16) | ((slot & 0x1f) << 11) |
176 ((func & 0x7) << 8) | (reg & 0xff);
177 if (sc->sc_extended_config)
178 config_addr |= (reg & 0xf00) << 16;
180 if (sc->ex_read_pci_config != -1)
181 error = rtas_call_method(sc->ex_read_pci_config, 4, 2,
182 config_addr, sc->pci_sc.sc_pcir.phys_hi,
183 sc->pci_sc.sc_pcir.phys_mid, width, &pcierror, &retval);
185 error = rtas_call_method(sc->read_pci_config, 2, 2,
186 config_addr, width, &pcierror, &retval);
188 /* Sign-extend output */
191 retval = (int32_t)(int8_t)(retval);
194 retval = (int32_t)(int16_t)(retval);
198 if (error < 0 || pcierror != 0)
205 rtaspci_write_config(device_t dev, u_int bus, u_int slot, u_int func,
206 u_int reg, uint32_t val, int width)
208 struct rtaspci_softc *sc;
209 uint32_t config_addr;
212 sc = device_get_softc(dev);
214 config_addr = ((bus & 0xff) << 16) | ((slot & 0x1f) << 11) |
215 ((func & 0x7) << 8) | (reg & 0xff);
216 if (sc->sc_extended_config)
217 config_addr |= (reg & 0xf00) << 16;
219 if (sc->ex_write_pci_config != -1)
220 rtas_call_method(sc->ex_write_pci_config, 5, 1, config_addr,
221 sc->pci_sc.sc_pcir.phys_hi, sc->pci_sc.sc_pcir.phys_mid,
222 width, val, &pcierror);
224 rtas_call_method(sc->write_pci_config, 3, 1, config_addr,
225 width, val, &pcierror);
229 rtaspci_get_dma_tag(device_t dev, device_t child)
231 struct rtaspci_softc *sc;
233 sc = device_get_softc(dev);
234 return (sc->dma_tag);