Wait for the completion of DMA operations during writes

1 files changed, 55 insertions, 0 deletions

diff --git a/irq.c b/irq.c
new file mode 100644
index 0000000..0154511
--- /dev/null
+++ b/irq.c
@@ -0,0 +1,55 @@
+#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"
+
+int pcilib_wait_irq(pcilib_t *ctx, pcilib_irq_source_t source, size_t timeout, size_t *count) {
+    int err;
+    
+    interrupt_wait_t arg = { 0 };
+    
+    arg.source = source;
+    arg.timeout = timeout;
+
+    if (count) arg.count = 1;
+
+    err = ioctl(ctx->handle, PCIDRIVER_IOC_WAITI, &arg);
+    if (err) {
+	pcilib_error("PCIDRIVER_IOC_WAITI ioctl have failed");
+	return PCILIB_ERROR_FAILED;
+    }
+    
+    if (!arg.count) return PCILIB_ERROR_TIMEOUT;
+
+    if (count) *count = arg.count;
+    
+    return 0;
+}
+
+int pcilib_clear_irq(pcilib_t *ctx, pcilib_irq_source_t source) {
+    int err;
+    
+    err = ioctl(ctx->handle, PCIDRIVER_IOC_CLEAR_IOQ, source);
+    if (err) {
+	pcilib_error("PCIDRIVER_IOC_CLEAR_IOQ ioctl have failed");
+	return PCILIB_ERROR_FAILED;
+    }
+    
+    return 0;
+}
+
+