mirror of
https://gitlab.freedesktop.org/pipewire/pipewire
synced 2024-09-20 00:11:31 +00:00
315 lines
7.6 KiB
C
315 lines
7.6 KiB
C
/* Spa
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*
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* Copyright © 2018 Wim Taymans
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <stddef.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <stdio.h>
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#include <sched.h>
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#include <fcntl.h>
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#ifdef __FreeBSD__
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#include <sys/sysctl.h>
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#endif
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#include <spa/support/log.h>
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#include <spa/support/cpu.h>
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#include <spa/support/plugin.h>
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#include <spa/utils/type.h>
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#include <spa/utils/hook.h>
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#include <spa/utils/names.h>
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#include <spa/utils/string.h>
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static struct spa_log_topic log_topic = SPA_LOG_TOPIC(0, "spa.cpu");
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#undef SPA_LOG_TOPIC_DEFAULT
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#define SPA_LOG_TOPIC_DEFAULT &log_topic
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struct impl {
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struct spa_handle handle;
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struct spa_cpu cpu;
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struct spa_log *log;
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uint32_t flags;
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uint32_t force;
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uint32_t count;
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uint32_t max_align;
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uint32_t vm_type;
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};
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static char *read_file(const char *name, char *buffer, size_t len)
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{
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int n, fd;
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if ((fd = open(name, O_RDONLY | O_CLOEXEC, 0)) < 0)
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return NULL;
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if ((n = read(fd, buffer, len-1)) < 0) {
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close(fd);
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return NULL;
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}
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buffer[n] = '\0';
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close(fd);
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return buffer;
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}
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# if defined (__i386__) || defined (__x86_64__)
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#include "cpu-x86.c"
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#define init(t) x86_init(t)
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#define impl_cpu_zero_denormals x86_zero_denormals
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# elif defined (__arm__) || defined (__aarch64__)
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#include "cpu-arm.c"
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#define init(t) arm_init(t)
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#define impl_cpu_zero_denormals arm_zero_denormals
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# else
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#define init(t)
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#define impl_cpu_zero_denormals NULL
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#endif
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static uint32_t
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impl_cpu_get_flags(void *object)
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{
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struct impl *impl = object;
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if (impl->force != SPA_CPU_FORCE_AUTODETECT)
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return impl->force;
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return impl->flags;
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}
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static int
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impl_cpu_force_flags(void *object, uint32_t flags)
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{
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struct impl *impl = object;
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impl->force = flags;
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return 0;
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}
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#ifndef __FreeBSD__
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static uint32_t get_count(struct impl *this)
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{
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cpu_set_t cpuset;
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CPU_ZERO(&cpuset);
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if (sched_getaffinity(0, sizeof(cpuset), &cpuset) == 0)
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return CPU_COUNT(&cpuset);
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return 1;
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}
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#else
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static uint32_t get_count(struct impl *this)
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{
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static const int mib[] = {CTL_HW, HW_NCPU};
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int r;
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size_t rSize = sizeof(r);
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if(-1 == sysctl(mib, 2, &r, &rSize, 0, 0))
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return 1;
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return r;
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}
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#endif
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static uint32_t
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impl_cpu_get_count(void *object)
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{
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struct impl *impl = object;
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return impl->count;
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}
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static uint32_t
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impl_cpu_get_max_align(void *object)
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{
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struct impl *impl = object;
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return impl->max_align;
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}
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static uint32_t
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impl_cpu_get_vm_type(void *object)
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{
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struct impl *impl = object;
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if (impl->vm_type != 0)
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return impl->vm_type;
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#if defined(__i386__) || defined(__x86_64__) || defined(__arm__) || defined(__aarch64__)
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static const char *const dmi_vendors[] = {
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"/sys/class/dmi/id/product_name", /* Test this before sys_vendor to detect KVM over QEMU */
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"/sys/class/dmi/id/sys_vendor",
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"/sys/class/dmi/id/board_vendor",
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"/sys/class/dmi/id/bios_vendor"
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};
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static const struct {
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const char *vendor;
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int id;
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} dmi_vendor_table[] = {
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{ "KVM", SPA_CPU_VM_KVM },
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{ "QEMU", SPA_CPU_VM_QEMU },
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{ "VMware", SPA_CPU_VM_VMWARE }, /* https://kb.vmware.com/s/article/1009458 */
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{ "VMW", SPA_CPU_VM_VMWARE },
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{ "innotek GmbH", SPA_CPU_VM_ORACLE },
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{ "Oracle Corporation", SPA_CPU_VM_ORACLE },
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{ "Xen", SPA_CPU_VM_XEN },
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{ "Bochs", SPA_CPU_VM_BOCHS },
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{ "Parallels", SPA_CPU_VM_PARALLELS },
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/* https://wiki.freebsd.org/bhyve */
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{ "BHYVE", SPA_CPU_VM_BHYVE },
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};
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uint32_t i, j;
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for (i = 0; i < SPA_N_ELEMENTS(dmi_vendors); i++) {
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char buffer[256], *s;
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if ((s = read_file(dmi_vendors[i], buffer, sizeof(buffer))) == NULL)
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continue;
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for (j = 0; j < SPA_N_ELEMENTS(dmi_vendor_table); j++) {
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if (spa_strstartswith(s, dmi_vendor_table[j].vendor)) {
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spa_log_debug(impl->log, "Virtualization %s found in DMI (%s)",
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s, dmi_vendors[i]);
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impl->vm_type = dmi_vendor_table[j].id;
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goto done;
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}
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}
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}
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done:
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#endif
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return impl->vm_type;
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}
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static const struct spa_cpu_methods impl_cpu = {
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SPA_VERSION_CPU_METHODS,
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.get_flags = impl_cpu_get_flags,
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.force_flags = impl_cpu_force_flags,
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.get_count = impl_cpu_get_count,
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.get_max_align = impl_cpu_get_max_align,
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.get_vm_type = impl_cpu_get_vm_type,
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.zero_denormals = impl_cpu_zero_denormals,
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};
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static int impl_get_interface(struct spa_handle *handle, const char *type, void **interface)
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{
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struct impl *this;
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spa_return_val_if_fail(handle != NULL, -EINVAL);
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spa_return_val_if_fail(interface != NULL, -EINVAL);
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this = (struct impl *) handle;
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if (spa_streq(type, SPA_TYPE_INTERFACE_CPU))
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*interface = &this->cpu;
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else
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return -ENOENT;
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return 0;
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}
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static int impl_clear(struct spa_handle *handle)
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{
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return 0;
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}
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static size_t
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impl_get_size(const struct spa_handle_factory *factory,
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const struct spa_dict *params)
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{
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return sizeof(struct impl);
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}
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static int
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impl_init(const struct spa_handle_factory *factory,
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struct spa_handle *handle,
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const struct spa_dict *info,
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const struct spa_support *support,
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uint32_t n_support)
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{
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struct impl *this;
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const char *str;
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spa_return_val_if_fail(factory != NULL, -EINVAL);
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spa_return_val_if_fail(handle != NULL, -EINVAL);
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handle->get_interface = impl_get_interface;
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handle->clear = impl_clear;
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this = (struct impl *) handle;
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this->cpu.iface = SPA_INTERFACE_INIT(
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SPA_TYPE_INTERFACE_CPU,
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SPA_VERSION_CPU,
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&impl_cpu, this);
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this->log = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_Log);
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spa_log_topic_init(this->log, &log_topic);
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this->flags = 0;
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this->force = SPA_CPU_FORCE_AUTODETECT;
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this->max_align = 16;
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this->count = get_count(this);
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init(this);
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if (info) {
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if ((str = spa_dict_lookup(info, SPA_KEY_CPU_FORCE)) != NULL)
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this->flags = atoi(str);
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if ((str = spa_dict_lookup(info, SPA_KEY_CPU_VM_TYPE)) != NULL)
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this->vm_type = atoi(str);
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if ((str = spa_dict_lookup(info, SPA_KEY_CPU_ZERO_DENORMALS)) != NULL)
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spa_cpu_zero_denormals(&this->cpu, spa_atob(str));
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}
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spa_log_debug(this->log, "%p: count:%d align:%d flags:%08x",
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this, this->count, this->max_align, this->flags);
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return 0;
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}
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static const struct spa_interface_info impl_interfaces[] = {
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{SPA_TYPE_INTERFACE_CPU,},
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};
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static int
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impl_enum_interface_info(const struct spa_handle_factory *factory,
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const struct spa_interface_info **info,
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uint32_t *index)
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{
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spa_return_val_if_fail(factory != NULL, -EINVAL);
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spa_return_val_if_fail(info != NULL, -EINVAL);
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spa_return_val_if_fail(index != NULL, -EINVAL);
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switch (*index) {
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case 0:
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*info = &impl_interfaces[*index];
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break;
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default:
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return 0;
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}
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(*index)++;
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return 1;
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}
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const struct spa_handle_factory spa_support_cpu_factory = {
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SPA_VERSION_HANDLE_FACTORY,
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SPA_NAME_SUPPORT_CPU,
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NULL,
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impl_get_size,
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impl_init,
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impl_enum_interface_info,
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};
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