* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-
#include <string.h>
-#include <stdlib.h>
#include <stdio.h>
-#include <stdint.h>
#include <unistd.h>
-#include <fcntl.h>
#include <inttypes.h>
-#include <sys/mman.h>
-#include <sys/queue.h>
-#include <pthread.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include <errno.h>
#include "eal_private.h"
#include "eal_internal_cfg.h"
-enum timer_source eal_timer_source = EAL_TIMER_HPET;
-
-/* The frequency of the RDTSC timer resolution */
-static uint64_t eal_tsc_resolution_hz = 0;
-
#ifdef RTE_LIBEAL_USE_HPET
-
-#define DEV_HPET "/dev/hpet"
-
-/* Maximum number of counters. */
-#define HPET_TIMER_NUM 3
-
-/* General capabilities register */
-#define CLK_PERIOD_SHIFT 32 /* Clock period shift. */
-#define CLK_PERIOD_MASK 0xffffffff00000000ULL /* Clock period mask. */
-
-/**
- * HPET timer registers. From the Intel IA-PC HPET (High Precision Event
- * Timers) Specification.
- */
-struct eal_hpet_regs {
- /* Memory-mapped, software visible registers */
- uint64_t capabilities; /**< RO General Capabilities Register. */
- uint64_t reserved0; /**< Reserved for future use. */
- uint64_t config; /**< RW General Configuration Register. */
- uint64_t reserved1; /**< Reserved for future use. */
- uint64_t isr; /**< RW Clear General Interrupt Status. */
- uint64_t reserved2[25]; /**< Reserved for future use. */
- union {
- uint64_t counter; /**< RW Main Counter Value Register. */
- struct {
- uint32_t counter_l; /**< RW Main Counter Low. */
- uint32_t counter_h; /**< RW Main Counter High. */
- };
- };
- uint64_t reserved3; /**< Reserved for future use. */
- struct {
- uint64_t config; /**< RW Timer Config and Capability Reg. */
- uint64_t comp; /**< RW Timer Comparator Value Register. */
- uint64_t fsb; /**< RW FSB Interrupt Route Register. */
- uint64_t reserved4; /**< Reserved for future use. */
- } timers[HPET_TIMER_NUM]; /**< Set of HPET timers. */
-};
-
-/* Mmap'd hpet registers */
-static volatile struct eal_hpet_regs *eal_hpet = NULL;
-
-/* Period at which the HPET counter increments in
- * femtoseconds (10^-15 seconds). */
-static uint32_t eal_hpet_resolution_fs = 0;
-
-/* Frequency of the HPET counter in Hz */
-static uint64_t eal_hpet_resolution_hz = 0;
-
-/* Incremented 4 times during one 32bits hpet full count */
-static uint32_t eal_hpet_msb;
-
-static pthread_t msb_inc_thread_id;
-
-/*
- * This function runs on a specific thread to update a global variable
- * containing used to process MSB of the HPET (unfortunatelly, we need
- * this because hpet is 32 bits by default under linux).
- */
-static void
-hpet_msb_inc(__attribute__((unused)) void *arg)
-{
- uint32_t t;
-
- while (1) {
- t = (eal_hpet->counter_l >> 30);
- if (t != (eal_hpet_msb & 3))
- eal_hpet_msb ++;
- sleep(10);
- }
-}
-
-uint64_t
-rte_get_hpet_hz(void)
-{
- if(internal_config.no_hpet)
- rte_panic("Error, HPET called, but no HPET present\n");
-
- return eal_hpet_resolution_hz;
-}
-
-uint64_t
-rte_get_hpet_cycles(void)
-{
- uint32_t t, msb;
- uint64_t ret;
-
- if(internal_config.no_hpet)
- rte_panic("Error, HPET called, but no HPET present\n");
-
- t = eal_hpet->counter_l;
- msb = eal_hpet_msb;
- ret = (msb + 2 - (t >> 30)) / 4;
- ret <<= 32;
- ret += t;
- return ret;
-}
-
+#warning HPET is not supported in FreeBSD
#endif
+enum timer_source eal_timer_source = EAL_TIMER_TSC;
+
+/* The frequency of the RDTSC timer resolution */
+static uint64_t eal_tsc_resolution_hz = 0;
void
rte_delay_us(unsigned us)
return eal_tsc_resolution_hz;
}
-
-#ifdef RTE_LIBEAL_USE_HPET
-/*
- * Open and mmap /dev/hpet (high precision event timer) that will
- * provide our time reference.
- */
-int
-rte_eal_hpet_init(int make_default)
-{
- int fd, ret;
-
- if (internal_config.no_hpet) {
- RTE_LOG(INFO, EAL, "HPET is disabled\n");
- return -1;
- }
-
- fd = open(DEV_HPET, O_RDONLY);
- if (fd < 0) {
- RTE_LOG(ERR, EAL, "ERROR: Cannot open "DEV_HPET": %s!\n",
- strerror(errno));
- internal_config.no_hpet = 1;
- return -1;
- }
- eal_hpet = mmap(NULL, 1024, PROT_READ, MAP_SHARED, fd, 0);
- if (eal_hpet == MAP_FAILED) {
- RTE_LOG(ERR, EAL, "ERROR: Cannot mmap "DEV_HPET"!\n"
- "Please enable CONFIG_HPET_MMAP in your kernel configuration "
- "to allow HPET support.\n"
- "To run without using HPET, set CONFIG_RTE_LIBEAL_USE_HPET=n "
- "in your build configuration or use '--no-hpet' EAL flag.\n");
- close(fd);
- internal_config.no_hpet = 1;
- return -1;
- }
- close(fd);
-
- eal_hpet_resolution_fs = (uint32_t)((eal_hpet->capabilities &
- CLK_PERIOD_MASK) >>
- CLK_PERIOD_SHIFT);
-
- eal_hpet_resolution_hz = (1000ULL*1000ULL*1000ULL*1000ULL*1000ULL) /
- (uint64_t)eal_hpet_resolution_fs;
-
- RTE_LOG(INFO, EAL, "HPET frequency is ~%"PRIu64" kHz\n",
- eal_hpet_resolution_hz/1000);
-
- eal_hpet_msb = (eal_hpet->counter_l >> 30);
-
- /* create a thread that will increment a global variable for
- * msb (hpet is 32 bits by default under linux) */
- ret = pthread_create(&msb_inc_thread_id, NULL,
- (void *(*)(void *))hpet_msb_inc, NULL);
- if (ret < 0) {
- RTE_LOG(ERR, EAL, "ERROR: Cannot create HPET timer thread!\n");
- internal_config.no_hpet = 1;
- return -1;
- }
-
- if (make_default)
- eal_timer_source = EAL_TIMER_HPET;
- return 0;
-}
-#endif
-
static int
set_tsc_freq_from_sysctl(void)
{
RTE_LOG(WARNING, EAL, "TSC is not invariant\n");
sz = sizeof(eal_tsc_resolution_hz);
-
if (sysctlbyname("machdep.tsc_freq", &eal_tsc_resolution_hz, &sz, NULL, 0)) {
RTE_LOG(WARNING, EAL, "%s\n", strerror(errno));
return -1;
* This function measures the TSC frequency. It uses a variety of approaches.
*
* 1. Read the TSC frequency value provided by the kernel
- * 2. If kernel does not provide that, and we have HPET support, tune using HPET
- * 3. Lastly, if neither of the above can be used, just sleep for 1 second and
- * tune off that, printing a warning about inaccuracy of timing
+ * 2. If above does not work, just sleep for 1 second and tune off that,
+ * printing a warning about inaccuracy of timing
*/
static void
set_tsc_freq(void)
int
rte_eal_timer_init(void)
{
-
- eal_timer_source = EAL_TIMER_TSC;
-
set_tsc_freq();
return 0;
}
git.droids-corp.org / dpdk.git / commitdiff