diff options
Diffstat (limited to 'qemu/hw/arm/sysbus-fdt.c')
| -rw-r--r-- | qemu/hw/arm/sysbus-fdt.c | 542 |
1 files changed, 0 insertions, 542 deletions
diff --git a/qemu/hw/arm/sysbus-fdt.c b/qemu/hw/arm/sysbus-fdt.c deleted file mode 100644 index 5debb3348..000000000 --- a/qemu/hw/arm/sysbus-fdt.c +++ /dev/null @@ -1,542 +0,0 @@ -/* - * ARM Platform Bus device tree generation helpers - * - * Copyright (c) 2014 Linaro Limited - * - * Authors: - * Alex Graf <agraf@suse.de> - * Eric Auger <eric.auger@linaro.org> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2 or later, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include "qemu/osdep.h" -#include "qapi/error.h" -#include <libfdt.h> -#include "qemu-common.h" -#ifdef CONFIG_LINUX -#include <linux/vfio.h> -#endif -#include "hw/arm/sysbus-fdt.h" -#include "qemu/error-report.h" -#include "sysemu/device_tree.h" -#include "hw/platform-bus.h" -#include "sysemu/sysemu.h" -#include "hw/vfio/vfio-platform.h" -#include "hw/vfio/vfio-calxeda-xgmac.h" -#include "hw/vfio/vfio-amd-xgbe.h" -#include "hw/arm/fdt.h" - -/* - * internal struct that contains the information to create dynamic - * sysbus device node - */ -typedef struct PlatformBusFDTData { - void *fdt; /* device tree handle */ - int irq_start; /* index of the first IRQ usable by platform bus devices */ - const char *pbus_node_name; /* name of the platform bus node */ - PlatformBusDevice *pbus; -} PlatformBusFDTData; - -/* - * struct used when calling the machine init done notifier - * that constructs the fdt nodes of platform bus devices - */ -typedef struct PlatformBusFDTNotifierParams { - Notifier notifier; - ARMPlatformBusFDTParams *fdt_params; -} PlatformBusFDTNotifierParams; - -/* struct that associates a device type name and a node creation function */ -typedef struct NodeCreationPair { - const char *typename; - int (*add_fdt_node_fn)(SysBusDevice *sbdev, void *opaque); -} NodeCreationPair; - -/* helpers */ - -typedef struct HostProperty { - const char *name; - bool optional; -} HostProperty; - -#ifdef CONFIG_LINUX - -/** - * copy_properties_from_host - * - * copies properties listed in an array from host device tree to - * guest device tree. If a non optional property is not found, the - * function asserts. An optional property is ignored if not found - * in the host device tree. - * @props: array of HostProperty to copy - * @nb_props: number of properties in the array - * @host_dt: host device tree blob - * @guest_dt: guest device tree blob - * @node_path: host dt node path where the property is supposed to be - found - * @nodename: guest node name the properties should be added to - */ -static void copy_properties_from_host(HostProperty *props, int nb_props, - void *host_fdt, void *guest_fdt, - char *node_path, char *nodename) -{ - int i, prop_len; - const void *r; - Error *err = NULL; - - for (i = 0; i < nb_props; i++) { - r = qemu_fdt_getprop(host_fdt, node_path, - props[i].name, - &prop_len, - props[i].optional ? &err : &error_fatal); - if (r) { - qemu_fdt_setprop(guest_fdt, nodename, - props[i].name, r, prop_len); - } else { - if (prop_len != -FDT_ERR_NOTFOUND) { - /* optional property not returned although property exists */ - error_report_err(err); - } else { - error_free(err); - } - } - } -} - -/* clock properties whose values are copied/pasted from host */ -static HostProperty clock_copied_properties[] = { - {"compatible", false}, - {"#clock-cells", false}, - {"clock-frequency", true}, - {"clock-output-names", true}, -}; - -/** - * fdt_build_clock_node - * - * Build a guest clock node, used as a dependency from a passthrough'ed - * device. Most information are retrieved from the host clock node. - * Also check the host clock is a fixed one. - * - * @host_fdt: host device tree blob from which info are retrieved - * @guest_fdt: guest device tree blob where the clock node is added - * @host_phandle: phandle of the clock in host device tree - * @guest_phandle: phandle to assign to the guest node - */ -static void fdt_build_clock_node(void *host_fdt, void *guest_fdt, - uint32_t host_phandle, - uint32_t guest_phandle) -{ - char *node_path = NULL; - char *nodename; - const void *r; - int ret, node_offset, prop_len, path_len = 16; - - node_offset = fdt_node_offset_by_phandle(host_fdt, host_phandle); - if (node_offset <= 0) { - error_setg(&error_fatal, - "not able to locate clock handle %d in host device tree", - host_phandle); - } - node_path = g_malloc(path_len); - while ((ret = fdt_get_path(host_fdt, node_offset, node_path, path_len)) - == -FDT_ERR_NOSPACE) { - path_len += 16; - node_path = g_realloc(node_path, path_len); - } - if (ret < 0) { - error_setg(&error_fatal, - "not able to retrieve node path for clock handle %d", - host_phandle); - } - - r = qemu_fdt_getprop(host_fdt, node_path, "compatible", &prop_len, - &error_fatal); - if (strcmp(r, "fixed-clock")) { - error_setg(&error_fatal, - "clock handle %d is not a fixed clock", host_phandle); - } - - nodename = strrchr(node_path, '/'); - qemu_fdt_add_subnode(guest_fdt, nodename); - - copy_properties_from_host(clock_copied_properties, - ARRAY_SIZE(clock_copied_properties), - host_fdt, guest_fdt, - node_path, nodename); - - qemu_fdt_setprop_cell(guest_fdt, nodename, "phandle", guest_phandle); - - g_free(node_path); -} - -/** - * sysfs_to_dt_name: convert the name found in sysfs into the node name - * for instance e0900000.xgmac is converted into xgmac@e0900000 - * @sysfs_name: directory name in sysfs - * - * returns the device tree name upon success or NULL in case the sysfs name - * does not match the expected format - */ -static char *sysfs_to_dt_name(const char *sysfs_name) -{ - gchar **substrings = g_strsplit(sysfs_name, ".", 2); - char *dt_name = NULL; - - if (!substrings || !substrings[0] || !substrings[1]) { - goto out; - } - dt_name = g_strdup_printf("%s@%s", substrings[1], substrings[0]); -out: - g_strfreev(substrings); - return dt_name; -} - -/* Device Specific Code */ - -/** - * add_calxeda_midway_xgmac_fdt_node - * - * Generates a simple node with following properties: - * compatible string, regs, interrupts, dma-coherent - */ -static int add_calxeda_midway_xgmac_fdt_node(SysBusDevice *sbdev, void *opaque) -{ - PlatformBusFDTData *data = opaque; - PlatformBusDevice *pbus = data->pbus; - void *fdt = data->fdt; - const char *parent_node = data->pbus_node_name; - int compat_str_len, i; - char *nodename; - uint32_t *irq_attr, *reg_attr; - uint64_t mmio_base, irq_number; - VFIOPlatformDevice *vdev = VFIO_PLATFORM_DEVICE(sbdev); - VFIODevice *vbasedev = &vdev->vbasedev; - - mmio_base = platform_bus_get_mmio_addr(pbus, sbdev, 0); - nodename = g_strdup_printf("%s/%s@%" PRIx64, parent_node, - vbasedev->name, mmio_base); - qemu_fdt_add_subnode(fdt, nodename); - - compat_str_len = strlen(vdev->compat) + 1; - qemu_fdt_setprop(fdt, nodename, "compatible", - vdev->compat, compat_str_len); - - qemu_fdt_setprop(fdt, nodename, "dma-coherent", "", 0); - - reg_attr = g_new(uint32_t, vbasedev->num_regions * 2); - for (i = 0; i < vbasedev->num_regions; i++) { - mmio_base = platform_bus_get_mmio_addr(pbus, sbdev, i); - reg_attr[2 * i] = cpu_to_be32(mmio_base); - reg_attr[2 * i + 1] = cpu_to_be32( - memory_region_size(vdev->regions[i]->mem)); - } - qemu_fdt_setprop(fdt, nodename, "reg", reg_attr, - vbasedev->num_regions * 2 * sizeof(uint32_t)); - - irq_attr = g_new(uint32_t, vbasedev->num_irqs * 3); - for (i = 0; i < vbasedev->num_irqs; i++) { - irq_number = platform_bus_get_irqn(pbus, sbdev , i) - + data->irq_start; - irq_attr[3 * i] = cpu_to_be32(GIC_FDT_IRQ_TYPE_SPI); - irq_attr[3 * i + 1] = cpu_to_be32(irq_number); - irq_attr[3 * i + 2] = cpu_to_be32(GIC_FDT_IRQ_FLAGS_LEVEL_HI); - } - qemu_fdt_setprop(fdt, nodename, "interrupts", - irq_attr, vbasedev->num_irqs * 3 * sizeof(uint32_t)); - g_free(irq_attr); - g_free(reg_attr); - g_free(nodename); - return 0; -} - -/* AMD xgbe properties whose values are copied/pasted from host */ -static HostProperty amd_xgbe_copied_properties[] = { - {"compatible", false}, - {"dma-coherent", true}, - {"amd,per-channel-interrupt", true}, - {"phy-mode", false}, - {"mac-address", true}, - {"amd,speed-set", false}, - {"amd,serdes-blwc", true}, - {"amd,serdes-cdr-rate", true}, - {"amd,serdes-pq-skew", true}, - {"amd,serdes-tx-amp", true}, - {"amd,serdes-dfe-tap-config", true}, - {"amd,serdes-dfe-tap-enable", true}, - {"clock-names", false}, -}; - -/** - * add_amd_xgbe_fdt_node - * - * Generates the combined xgbe/phy node following kernel >=4.2 - * binding documentation: - * Documentation/devicetree/bindings/net/amd-xgbe.txt: - * Also 2 clock nodes are created (dma and ptp) - * - * Asserts in case of error - */ -static int add_amd_xgbe_fdt_node(SysBusDevice *sbdev, void *opaque) -{ - PlatformBusFDTData *data = opaque; - PlatformBusDevice *pbus = data->pbus; - VFIOPlatformDevice *vdev = VFIO_PLATFORM_DEVICE(sbdev); - VFIODevice *vbasedev = &vdev->vbasedev; - VFIOINTp *intp; - const char *parent_node = data->pbus_node_name; - char **node_path, *nodename, *dt_name; - void *guest_fdt = data->fdt, *host_fdt; - const void *r; - int i, prop_len; - uint32_t *irq_attr, *reg_attr, *host_clock_phandles; - uint64_t mmio_base, irq_number; - uint32_t guest_clock_phandles[2]; - - host_fdt = load_device_tree_from_sysfs(); - - dt_name = sysfs_to_dt_name(vbasedev->name); - if (!dt_name) { - error_setg(&error_fatal, "%s incorrect sysfs device name %s", - __func__, vbasedev->name); - } - node_path = qemu_fdt_node_path(host_fdt, dt_name, vdev->compat, - &error_fatal); - if (!node_path || !node_path[0]) { - error_setg(&error_fatal, "%s unable to retrieve node path for %s/%s", - __func__, dt_name, vdev->compat); - } - - if (node_path[1]) { - error_setg(&error_fatal, "%s more than one node matching %s/%s!", - __func__, dt_name, vdev->compat); - } - - g_free(dt_name); - - if (vbasedev->num_regions != 5) { - error_setg(&error_fatal, "%s Does the host dt node combine XGBE/PHY?", - __func__); - } - - /* generate nodes for DMA_CLK and PTP_CLK */ - r = qemu_fdt_getprop(host_fdt, node_path[0], "clocks", - &prop_len, &error_fatal); - if (prop_len != 8) { - error_setg(&error_fatal, "%s clocks property should contain 2 handles", - __func__); - } - host_clock_phandles = (uint32_t *)r; - guest_clock_phandles[0] = qemu_fdt_alloc_phandle(guest_fdt); - guest_clock_phandles[1] = qemu_fdt_alloc_phandle(guest_fdt); - - /** - * clock handles fetched from host dt are in be32 layout whereas - * rest of the code uses cpu layout. Also guest clock handles are - * in cpu layout. - */ - fdt_build_clock_node(host_fdt, guest_fdt, - be32_to_cpu(host_clock_phandles[0]), - guest_clock_phandles[0]); - - fdt_build_clock_node(host_fdt, guest_fdt, - be32_to_cpu(host_clock_phandles[1]), - guest_clock_phandles[1]); - - /* combined XGBE/PHY node */ - mmio_base = platform_bus_get_mmio_addr(pbus, sbdev, 0); - nodename = g_strdup_printf("%s/%s@%" PRIx64, parent_node, - vbasedev->name, mmio_base); - qemu_fdt_add_subnode(guest_fdt, nodename); - - copy_properties_from_host(amd_xgbe_copied_properties, - ARRAY_SIZE(amd_xgbe_copied_properties), - host_fdt, guest_fdt, - node_path[0], nodename); - - qemu_fdt_setprop_cells(guest_fdt, nodename, "clocks", - guest_clock_phandles[0], - guest_clock_phandles[1]); - - reg_attr = g_new(uint32_t, vbasedev->num_regions * 2); - for (i = 0; i < vbasedev->num_regions; i++) { - mmio_base = platform_bus_get_mmio_addr(pbus, sbdev, i); - reg_attr[2 * i] = cpu_to_be32(mmio_base); - reg_attr[2 * i + 1] = cpu_to_be32( - memory_region_size(vdev->regions[i]->mem)); - } - qemu_fdt_setprop(guest_fdt, nodename, "reg", reg_attr, - vbasedev->num_regions * 2 * sizeof(uint32_t)); - - irq_attr = g_new(uint32_t, vbasedev->num_irqs * 3); - for (i = 0; i < vbasedev->num_irqs; i++) { - irq_number = platform_bus_get_irqn(pbus, sbdev , i) - + data->irq_start; - irq_attr[3 * i] = cpu_to_be32(GIC_FDT_IRQ_TYPE_SPI); - irq_attr[3 * i + 1] = cpu_to_be32(irq_number); - /* - * General device interrupt and PCS auto-negotiation interrupts are - * level-sensitive while the 4 per-channel interrupts are edge - * sensitive - */ - QLIST_FOREACH(intp, &vdev->intp_list, next) { - if (intp->pin == i) { - break; - } - } - if (intp->flags & VFIO_IRQ_INFO_AUTOMASKED) { - irq_attr[3 * i + 2] = cpu_to_be32(GIC_FDT_IRQ_FLAGS_LEVEL_HI); - } else { - irq_attr[3 * i + 2] = cpu_to_be32(GIC_FDT_IRQ_FLAGS_EDGE_LO_HI); - } - } - qemu_fdt_setprop(guest_fdt, nodename, "interrupts", - irq_attr, vbasedev->num_irqs * 3 * sizeof(uint32_t)); - - g_free(host_fdt); - g_strfreev(node_path); - g_free(irq_attr); - g_free(reg_attr); - g_free(nodename); - return 0; -} - -#endif /* CONFIG_LINUX */ - -/* list of supported dynamic sysbus devices */ -static const NodeCreationPair add_fdt_node_functions[] = { -#ifdef CONFIG_LINUX - {TYPE_VFIO_CALXEDA_XGMAC, add_calxeda_midway_xgmac_fdt_node}, - {TYPE_VFIO_AMD_XGBE, add_amd_xgbe_fdt_node}, -#endif - {"", NULL}, /* last element */ -}; - -/* Generic Code */ - -/** - * add_fdt_node - add the device tree node of a dynamic sysbus device - * - * @sbdev: handle to the sysbus device - * @opaque: handle to the PlatformBusFDTData - * - * Checks the sysbus type belongs to the list of device types that - * are dynamically instantiable and if so call the node creation - * function. - */ -static int add_fdt_node(SysBusDevice *sbdev, void *opaque) -{ - int i, ret; - - for (i = 0; i < ARRAY_SIZE(add_fdt_node_functions); i++) { - if (!strcmp(object_get_typename(OBJECT(sbdev)), - add_fdt_node_functions[i].typename)) { - ret = add_fdt_node_functions[i].add_fdt_node_fn(sbdev, opaque); - assert(!ret); - return 0; - } - } - error_report("Device %s can not be dynamically instantiated", - qdev_fw_name(DEVICE(sbdev))); - exit(1); -} - -/** - * add_all_platform_bus_fdt_nodes - create all the platform bus nodes - * - * builds the parent platform bus node and all the nodes of dynamic - * sysbus devices attached to it. - */ -static void add_all_platform_bus_fdt_nodes(ARMPlatformBusFDTParams *fdt_params) -{ - const char platcomp[] = "qemu,platform\0simple-bus"; - PlatformBusDevice *pbus; - DeviceState *dev; - gchar *node; - uint64_t addr, size; - int irq_start, dtb_size; - struct arm_boot_info *info = fdt_params->binfo; - const ARMPlatformBusSystemParams *params = fdt_params->system_params; - const char *intc = fdt_params->intc; - void *fdt = info->get_dtb(info, &dtb_size); - - /* - * If the user provided a dtb, we assume the dynamic sysbus nodes - * already are integrated there. This corresponds to a use case where - * the dynamic sysbus nodes are complex and their generation is not yet - * supported. In that case the user can take charge of the guest dt - * while qemu takes charge of the qom stuff. - */ - if (info->dtb_filename) { - return; - } - - assert(fdt); - - node = g_strdup_printf("/platform@%"PRIx64, params->platform_bus_base); - addr = params->platform_bus_base; - size = params->platform_bus_size; - irq_start = params->platform_bus_first_irq; - - /* Create a /platform node that we can put all devices into */ - qemu_fdt_add_subnode(fdt, node); - qemu_fdt_setprop(fdt, node, "compatible", platcomp, sizeof(platcomp)); - - /* Our platform bus region is less than 32bits, so 1 cell is enough for - * address and size - */ - qemu_fdt_setprop_cells(fdt, node, "#size-cells", 1); - qemu_fdt_setprop_cells(fdt, node, "#address-cells", 1); - qemu_fdt_setprop_cells(fdt, node, "ranges", 0, addr >> 32, addr, size); - - qemu_fdt_setprop_phandle(fdt, node, "interrupt-parent", intc); - - dev = qdev_find_recursive(sysbus_get_default(), TYPE_PLATFORM_BUS_DEVICE); - pbus = PLATFORM_BUS_DEVICE(dev); - - /* We can only create dt nodes for dynamic devices when they're ready */ - assert(pbus->done_gathering); - - PlatformBusFDTData data = { - .fdt = fdt, - .irq_start = irq_start, - .pbus_node_name = node, - .pbus = pbus, - }; - - /* Loop through all dynamic sysbus devices and create their node */ - foreach_dynamic_sysbus_device(add_fdt_node, &data); - - g_free(node); -} - -static void platform_bus_fdt_notify(Notifier *notifier, void *data) -{ - PlatformBusFDTNotifierParams *p = DO_UPCAST(PlatformBusFDTNotifierParams, - notifier, notifier); - - add_all_platform_bus_fdt_nodes(p->fdt_params); - g_free(p->fdt_params); - g_free(p); -} - -void arm_register_platform_bus_fdt_creator(ARMPlatformBusFDTParams *fdt_params) -{ - PlatformBusFDTNotifierParams *p = g_new(PlatformBusFDTNotifierParams, 1); - - p->fdt_params = fdt_params; - p->notifier.notify = platform_bus_fdt_notify; - qemu_add_machine_init_done_notifier(&p->notifier); -} |