thunder_pcie_fdt.c

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    1 /*
    2  * Copyright (C) 2016 Cavium Inc.
    3  * All rights reserved.
    4  *
    5  * Developed by Semihalf.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 #include "opt_platform.h"
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD$");
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/malloc.h>
   36 #include <sys/types.h>
   37 #include <sys/sysctl.h>
   38 #include <sys/kernel.h>
   39 #include <sys/rman.h>
   40 #include <sys/module.h>
   41 #include <sys/bus.h>
   42 #include <sys/endian.h>
   43 #include <sys/cpuset.h>
   44 
   45 #include <dev/ofw/openfirm.h>
   46 #include <dev/ofw/ofw_bus.h>
   47 #include <dev/ofw/ofw_bus_subr.h>
   48 
   49 #include <dev/pci/pcireg.h>
   50 #include <dev/pci/pcivar.h>
   51 #include <dev/pci/pci_host_generic.h>
   52 #include <dev/pci/pci_host_generic_fdt.h>
   53 #include <dev/pci/pcib_private.h>
   54 
   55 #include "thunder_pcie_common.h"
   56 
   57 #include "pcib_if.h"
   58 
   59 #ifdef THUNDERX_PASS_1_1_ERRATA
   60 static struct resource * thunder_pcie_fdt_alloc_resource(device_t, device_t,
   61     int, int *, rman_res_t, rman_res_t, rman_res_t, u_int);
   62 static int thunder_pcie_fdt_release_resource(device_t, device_t,
   63     int, int, struct resource*);
   64 #endif
   65 static int thunder_pcie_fdt_attach(device_t);
   66 static int thunder_pcie_fdt_probe(device_t);
   67 static int thunder_pcie_fdt_get_id(device_t, device_t, enum pci_id_type,
   68     uintptr_t *);
   69 
   70 static const struct ofw_bus_devinfo *thunder_pcie_ofw_get_devinfo(device_t,
   71     device_t);
   72 
   73 /* OFW bus interface */
   74 struct thunder_pcie_ofw_devinfo {
   75         struct ofw_bus_devinfo  di_dinfo;
   76         struct resource_list    di_rl;
   77 };
   78 
   79 static device_method_t thunder_pcie_fdt_methods[] = {
   80         /* Device interface */
   81         DEVMETHOD(device_probe,         thunder_pcie_fdt_probe),
   82         DEVMETHOD(device_attach,        thunder_pcie_fdt_attach),
   83 #ifdef THUNDERX_PASS_1_1_ERRATA
   84         DEVMETHOD(bus_alloc_resource,   thunder_pcie_fdt_alloc_resource),
   85         DEVMETHOD(bus_release_resource, thunder_pcie_fdt_release_resource),
   86 #endif
   87 
   88         /* pcib interface */
   89         DEVMETHOD(pcib_get_id,          thunder_pcie_fdt_get_id),
   90 
   91         /* ofw interface */
   92         DEVMETHOD(ofw_bus_get_devinfo,  thunder_pcie_ofw_get_devinfo),
   93         DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
   94         DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
   95         DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
   96         DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
   97         DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
   98 
   99         /* End */
  100         DEVMETHOD_END
  101 };
  102 
  103 DEFINE_CLASS_1(pcib, thunder_pcie_fdt_driver, thunder_pcie_fdt_methods,
  104     sizeof(struct generic_pcie_fdt_softc), generic_pcie_fdt_driver);
  105 
  106 DRIVER_MODULE(thunder_pcib, simplebus, thunder_pcie_fdt_driver, 0, 0);
  107 DRIVER_MODULE(thunder_pcib, ofwbus, thunder_pcie_fdt_driver, 0, 0);
  108 
  109 static const struct ofw_bus_devinfo *
  110 thunder_pcie_ofw_get_devinfo(device_t bus __unused, device_t child)
  111 {
  112         struct thunder_pcie_ofw_devinfo *di;
  113 
  114         di = device_get_ivars(child);
  115         return (&di->di_dinfo);
  116 }
  117 
  118 static void
  119 get_addr_size_cells(phandle_t node, pcell_t *addr_cells, pcell_t *size_cells)
  120 {
  121 
  122         *addr_cells = 2;
  123         /* Find address cells if present */
  124         OF_getencprop(node, "#address-cells", addr_cells, sizeof(*addr_cells));
  125 
  126         *size_cells = 2;
  127         /* Find size cells if present */
  128         OF_getencprop(node, "#size-cells", size_cells, sizeof(*size_cells));
  129 }
  130 
  131 static int
  132 thunder_pcie_ofw_bus_attach(device_t dev)
  133 {
  134         struct thunder_pcie_ofw_devinfo *di;
  135         device_t child;
  136         phandle_t parent, node;
  137         pcell_t addr_cells, size_cells;
  138 
  139         parent = ofw_bus_get_node(dev);
  140         if (parent > 0) {
  141                 get_addr_size_cells(parent, &addr_cells, &size_cells);
  142                 /* Iterate through all bus subordinates */
  143                 for (node = OF_child(parent); node > 0; node = OF_peer(node)) {
  144                         /* Allocate and populate devinfo. */
  145                         di = malloc(sizeof(*di), M_DEVBUF, M_WAITOK | M_ZERO);
  146                         if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node) != 0) {
  147                                 free(di, M_DEVBUF);
  148                                 continue;
  149                         }
  150 
  151                         /* Initialize and populate resource list. */
  152                         resource_list_init(&di->di_rl);
  153                         ofw_bus_reg_to_rl(dev, node, addr_cells, size_cells,
  154                             &di->di_rl);
  155                         ofw_bus_intr_to_rl(dev, node, &di->di_rl, NULL);
  156 
  157                         /* Add newbus device for this FDT node */
  158                         child = device_add_child(dev, NULL, -1);
  159                         if (child == NULL) {
  160                                 resource_list_free(&di->di_rl);
  161                                 ofw_bus_gen_destroy_devinfo(&di->di_dinfo);
  162                                 free(di, M_DEVBUF);
  163                                 continue;
  164                         }
  165 
  166                         device_set_ivars(child, di);
  167                 }
  168         }
  169 
  170         return (0);
  171 }
  172 
  173 static int
  174 thunder_pcie_fdt_probe(device_t dev)
  175 {
  176 
  177         /* Check if we're running on Cavium ThunderX */
  178         if (!CPU_MATCH(CPU_IMPL_MASK | CPU_PART_MASK,
  179             CPU_IMPL_CAVIUM, CPU_PART_THUNDERX, 0, 0))
  180                 return (ENXIO);
  181 
  182         if (!ofw_bus_status_okay(dev))
  183                 return (ENXIO);
  184 
  185         if (ofw_bus_is_compatible(dev, "pci-host-ecam-generic") ||
  186             ofw_bus_is_compatible(dev, "cavium,thunder-pcie") ||
  187             ofw_bus_is_compatible(dev, "cavium,pci-host-thunder-ecam")) {
  188                 device_set_desc(dev, "Cavium Integrated PCI/PCI-E Controller");
  189                 return (BUS_PROBE_DEFAULT);
  190         }
  191 
  192         return (ENXIO);
  193 }
  194 
  195 static int
  196 thunder_pcie_fdt_attach(device_t dev)
  197 {
  198         struct generic_pcie_fdt_softc *sc;
  199 
  200         sc = device_get_softc(dev);
  201         thunder_pcie_identify_ecam(dev, &sc->base.ecam);
  202         sc->base.coherent = 1;
  203 
  204         /* Attach OFW bus */
  205         if (thunder_pcie_ofw_bus_attach(dev) != 0)
  206                 return (ENXIO);
  207 
  208         return (pci_host_generic_fdt_attach(dev));
  209 }
  210 
  211 static int
  212 thunder_pcie_fdt_get_id(device_t pci, device_t child, enum pci_id_type type,
  213     uintptr_t *id)
  214 {
  215         phandle_t node;
  216         int bsf;
  217 
  218         if (type != PCI_ID_MSI)
  219                 return (pcib_get_id(pci, child, type, id));
  220 
  221         node = ofw_bus_get_node(pci);
  222         if (OF_hasprop(node, "msi-map"))
  223                 return (generic_pcie_get_id(pci, child, type, id));
  224 
  225         bsf = pci_get_rid(child);
  226         *id = (pci_get_domain(child) << PCI_RID_DOMAIN_SHIFT) | bsf;
  227 
  228         return (0);
  229 }
  230 
  231 #ifdef THUNDERX_PASS_1_1_ERRATA
  232 struct resource *
  233 thunder_pcie_fdt_alloc_resource(device_t dev, device_t child, int type,
  234     int *rid, rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
  235 {
  236         struct generic_pcie_fdt_softc *sc;
  237         struct thunder_pcie_ofw_devinfo *di;
  238         struct resource_list_entry *rle;
  239         int i;
  240 
  241         /*
  242          * For PCIe devices that do not have FDT nodes pass
  243          * the request to the core driver.
  244          */
  245         if ((int)ofw_bus_get_node(child) <= 0)
  246                 return (thunder_pcie_alloc_resource(dev, child, type,
  247                     rid, start, end, count, flags));
  248 
  249         /* For other devices use OFW method */
  250         sc = device_get_softc(dev);
  251 
  252         if (RMAN_IS_DEFAULT_RANGE(start, end)) {
  253                 if ((di = device_get_ivars(child)) == NULL)
  254                         return (NULL);
  255                 if (type == SYS_RES_IOPORT)
  256                     type = SYS_RES_MEMORY;
  257 
  258                 /* Find defaults for this rid */
  259                 rle = resource_list_find(&di->di_rl, type, *rid);
  260                 if (rle == NULL)
  261                         return (NULL);
  262 
  263                 start = rle->start;
  264                 end = rle->end;
  265                 count = rle->count;
  266         }
  267 
  268         if (type == SYS_RES_MEMORY) {
  269                 /* Remap through ranges property */
  270                 for (i = 0; i < MAX_RANGES_TUPLES; i++) {
  271                         if (start >= sc->base.ranges[i].phys_base &&
  272                             end < (sc->base.ranges[i].pci_base +
  273                             sc->base.ranges[i].size)) {
  274                                 start -= sc->base.ranges[i].phys_base;
  275                                 start += sc->base.ranges[i].pci_base;
  276                                 end -= sc->base.ranges[i].phys_base;
  277                                 end += sc->base.ranges[i].pci_base;
  278                                 break;
  279                         }
  280                 }
  281 
  282                 if (i == MAX_RANGES_TUPLES) {
  283                         device_printf(dev, "Could not map resource "
  284                             "%#jx-%#jx\n", start, end);
  285                         return (NULL);
  286                 }
  287         }
  288 
  289         return (bus_generic_alloc_resource(dev, child, type, rid, start,
  290             end, count, flags));
  291 }
  292 
  293 static int
  294 thunder_pcie_fdt_release_resource(device_t dev, device_t child, int type,
  295     int rid, struct resource *res)
  296 {
  297 
  298         if ((int)ofw_bus_get_node(child) <= 0)
  299                 return (pci_host_generic_core_release_resource(dev, child, type,
  300                     rid, res));
  301 
  302         return (bus_generic_release_resource(dev, child, type, rid, res));
  303 }
  304 #endif
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FreeBSD/Linux Kernel Cross Reference sys/arm64/cavium/thunder_pcie_fdt.c

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sys/arm64/cavium/thunder_pcie_fdt.c
