summaryrefslogtreecommitdiffstats
path: root/event.c
diff options
context:
space:
mode:
Diffstat (limited to 'event.c')
-rw-r--r--event.c230
1 files changed, 230 insertions, 0 deletions
diff --git a/event.c b/event.c
new file mode 100644
index 0000000..2eb7fc4
--- /dev/null
+++ b/event.c
@@ -0,0 +1,230 @@
+#define _POSIX_C_SOURCE 199309L
+#include <stdio.h>
+#include <string.h>
+#include <strings.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <arpa/inet.h>
+#include <errno.h>
+#include <assert.h>
+
+#include "pci.h"
+
+#include "tools.h"
+#include "error.h"
+
+pcilib_event_t pcilib_find_event(pcilib_t *ctx, const char *event) {
+ int i;
+ pcilib_register_bank_t res;
+ unsigned long addr;
+
+ pcilib_model_t model = pcilib_get_model(ctx);
+ pcilib_event_description_t *events = pcilib_model[model].events;
+
+ for (i = 0; events[i].name; i++) {
+ if (!strcasecmp(events[i].name, event)) return (1<<i);
+ }
+
+ return (pcilib_event_t)-1;
+}
+
+
+int pcilib_reset(pcilib_t *ctx) {
+ pcilib_event_api_description_t *api;
+
+ pcilib_model_t model = pcilib_get_model(ctx);
+
+ api = pcilib_model[model].event_api;
+ if (!api) {
+ pcilib_error("Event API is not supported by the selected model");
+ return PCILIB_ERROR_NOTSUPPORTED;
+ }
+
+ if (api->reset)
+ return api->reset(ctx->event_ctx);
+
+ return 0;
+}
+
+int pcilib_start(pcilib_t *ctx, pcilib_event_t event_mask, void *callback, void *user) {
+ pcilib_event_api_description_t *api;
+
+ pcilib_model_t model = pcilib_get_model(ctx);
+
+ api = pcilib_model[model].event_api;
+ if (!api) {
+ pcilib_error("Event API is not supported by the selected model");
+ return PCILIB_ERROR_NOTSUPPORTED;
+ }
+
+ if (api->start)
+ return api->start(ctx->event_ctx, event_mask, callback, user);
+
+ return 0;
+}
+
+int pcilib_stop(pcilib_t *ctx) {
+ pcilib_event_api_description_t *api;
+
+ pcilib_model_t model = pcilib_get_model(ctx);
+
+ api = pcilib_model[model].event_api;
+ if (!api) {
+ pcilib_error("Event API is not supported by the selected model");
+ return PCILIB_ERROR_NOTSUPPORTED;
+ }
+
+ if (api->stop)
+ return api->stop(ctx->event_ctx);
+
+ return 0;
+}
+
+pcilib_event_id_t pcilib_get_next_event(pcilib_t *ctx, pcilib_event_t event_mask, const struct timespec *timeout) {
+ pcilib_event_api_description_t *api;
+
+ pcilib_model_t model = pcilib_get_model(ctx);
+
+ api = pcilib_model[model].event_api;
+ if (!api) {
+ pcilib_error("Event API is not supported by the selected model");
+ return PCILIB_ERROR_NOTSUPPORTED;
+ }
+
+ if (api->next_event)
+ return api->next_event(ctx->event_ctx, event_mask, timeout);
+
+ pcilib_error("Event enumeration is not suppored by API");
+ return PCILIB_EVENT_ID_INVALID;
+}
+
+int pcilib_trigger(pcilib_t *ctx, pcilib_event_t event, size_t trigger_size, void *trigger_data) {
+ pcilib_event_api_description_t *api;
+
+ pcilib_model_t model = pcilib_get_model(ctx);
+
+ api = pcilib_model[model].event_api;
+ if (!api) {
+ pcilib_error("Event API is not supported by the selected model");
+ return PCILIB_ERROR_NOTSUPPORTED;
+ }
+
+ if (api->trigger)
+ return api->trigger(ctx->event_ctx, event, trigger_size, trigger_data);
+
+ pcilib_error("Self triggering is not supported by the selected model");
+ return PCILIB_ERROR_NOTSUPPORTED;
+}
+
+
+void *pcilib_get_data_with_argument(pcilib_t *ctx, pcilib_event_id_t event_id, pcilib_event_data_type_t data_type, size_t arg_size, void *arg, size_t *size) {
+ pcilib_event_api_description_t *api = pcilib_model[ctx->model].event_api;
+ if (!api) {
+ pcilib_error("Event API is not supported by the selected model");
+ return NULL;
+ }
+
+ if (api->get_data)
+ return api->get_data(ctx->event_ctx, event_id, data_type, arg_size, arg, size);
+
+ return NULL;
+}
+
+void *pcilib_get_data(pcilib_t *ctx, pcilib_event_id_t event_id, pcilib_event_data_type_t data_type, size_t *size) {
+ pcilib_event_api_description_t *api = pcilib_model[ctx->model].event_api;
+ if (!api) {
+ pcilib_error("Event API is not supported by the selected model");
+ return NULL;
+ }
+
+ if (api->get_data)
+ return api->get_data(ctx->event_ctx, event_id, data_type, 0, NULL, size);
+
+ return NULL;
+}
+
+int pcilib_return_data(pcilib_t *ctx, pcilib_event_id_t event_id) {
+ pcilib_event_api_description_t *api = pcilib_model[ctx->model].event_api;
+ if (!api) {
+ pcilib_error("Event API is not supported by the selected model");
+ return PCILIB_ERROR_NOTSUPPORTED;
+ }
+
+ if (api->return_data)
+ return api->return_data(ctx->event_ctx, event_id);
+
+ return 0;
+}
+
+
+typedef struct {
+ pcilib_t *ctx;
+
+ size_t *size;
+ void **data;
+} pcilib_grab_callback_user_data_t;
+
+static int pcilib_grab_callback(pcilib_event_t event, pcilib_event_id_t event_id, void *vuser) {
+ int err;
+ void *data;
+ size_t size;
+ int allocated = 0;
+
+ pcilib_grab_callback_user_data_t *user = (pcilib_grab_callback_user_data_t*)vuser;
+
+ data = pcilib_get_data(user->ctx, event_id, PCILIB_EVENT_DATA, &size);
+ if (!data) {
+ pcilib_error("Error getting event data");
+ return PCILIB_ERROR_FAILED;
+ }
+
+ if (*(user->data)) {
+ if ((user->size)&&(*(user->size) < size)) {
+ pcilib_error("The supplied buffer does not have enough space to hold the event data. Buffer size is %z, but %z is required", user->size, size);
+ return PCILIB_ERROR_MEMORY;
+ }
+
+ *(user->size) = size;
+ } else {
+ *(user->data) = malloc(size);
+ if (!*(user->data)) {
+ pcilib_error("Memory allocation (%i bytes) for event data is failed");
+ return PCILIB_ERROR_MEMORY;
+ }
+ if (*(user->size)) *(user->size) = size;
+ allocated = 1;
+ }
+
+ memcpy(*(user->data), data, size);
+
+ err = pcilib_return_data(user->ctx, event_id);
+ if (err) {
+ if (allocated) {
+ free(*(user->data));
+ *(user->data) = NULL;
+ }
+ pcilib_error("The event data had been overwritten before it was returned, data corruption may occur");
+ return err;
+ }
+
+ return 0;
+}
+
+int pcilib_grab(pcilib_t *ctx, pcilib_event_t event_mask, size_t *size, void **data, const struct timespec *timeout) {
+ int err;
+
+ pcilib_grab_callback_user_data_t user = {ctx, size, data};
+
+ err = pcilib_start(ctx, event_mask, pcilib_grab_callback, &user);
+ if (!err) {
+ if (timeout) nanosleep(timeout, NULL);
+ else err = pcilib_trigger(ctx, event_mask, 0, NULL);
+ }
+ pcilib_stop(ctx);
+ return 0;
+}