tools/guest-diag: decode engine-list, classlist and CE-cap RM control replies in the ioctl tracer

1 files changed, 88 insertions, 0 deletions

diff --git a/tools/guest-diag/ioctl_trace.c b/tools/guest-diag/ioctl_trace.c
index 04fea05..661636f 100644
--- a/tools/guest-diag/ioctl_trace.c
+++ b/tools/guest-diag/ioctl_trace.c
@@ -63,6 +63,93 @@ static void dump_free(pid_t pid, unsigned long arg)
 	fprintf(stderr, "[iot]   free old=0x%x st=0x%x\n", v[2], v[3]);
 }
 
+/* Decode the interesting RM control replies (params buffer read at syscall
+ * exit, so for OUT params this is the answer the client received). */
+static void decode_ctrl_reply(pid_t pid, unsigned int cmd,
+			      unsigned long long pParams, unsigned int size)
+{
+	unsigned int w[8];
+	unsigned long long listPtr;
+	unsigned int i, n;
+
+	if (!pParams || !size)
+		return;
+
+	switch (cmd) {
+	case 0x20800123: /* GPU_GET_ENGINES (V1): {count, ptr} */
+		if (size < 16 || read_child(pid, pParams, w, 16))
+			return;
+		memcpy(&listPtr, &w[2], sizeof(listPtr));
+		n = w[0];
+		fprintf(stderr, "[iot]     V1 engineCount=%u list@0x%llx:", n, listPtr);
+		if (n > 0x54)
+			n = 0x54;
+		for (i = 0; i < n; i++) {
+			unsigned int e = 0;
+			if (listPtr && read_child(pid, listPtr + i * 4, &e, 4))
+				break;
+			fprintf(stderr, " 0x%x", e);
+		}
+		fprintf(stderr, "\n");
+		break;
+	case 0x20800170: /* GPU_GET_ENGINES_V2: {count, list[]} */
+		if (size < 4 || read_child(pid, pParams, w, 8))
+			return;
+		n = w[0];
+		fprintf(stderr, "[iot]     V2 engineCount=%u:", n);
+		if (n > 0x54)
+			n = 0x54;
+		for (i = 0; i < n; i++) {
+			unsigned int e = 0;
+			if (read_child(pid, pParams + 4 + i * 4, &e, 4))
+				break;
+			fprintf(stderr, " 0x%x", e);
+		}
+		fprintf(stderr, "\n");
+		break;
+	case 0x20800124: /* GPU_GET_ENGINE_CLASSLIST: {engineType, n, ptr} */
+		if (size < 16 || read_child(pid, pParams, w, 16))
+			return;
+		memcpy(&listPtr, &w[4], sizeof(listPtr));
+		n = w[2];
+		fprintf(stderr, "[iot]     classlist eng=0x%x n=%u:", w[0], n);
+		if (n > 64)
+			n = 64;
+		for (i = 0; i < n; i++) {
+			unsigned int c = 0;
+			if (listPtr && read_child(pid, listPtr + i * 4, &c, 4))
+				break;
+			fprintf(stderr, " 0x%x", c);
+		}
+		fprintf(stderr, "\n");
+		break;
+	case 0x20802a07:  /* CE_GET_PHYSICAL_CAPS: {type, caps[8]} */
+	case 0x20802a01:  /* CE_GET_CAPS: {type, capsTblSize, capsTbl ptr...} */
+	case 0x20802a02: { /* CE_GET_CE_PCE_MASK: {type, pceMask} */
+		if (size < 8 || read_child(pid, pParams, w, 8))
+			return;
+		fprintf(stderr, "[iot]     ce ctrl 0x%x type=0x%x w4=0x%x w5=0x%x\n",
+			cmd, w[0], w[4], w[5]);
+		break;
+	}
+	case 0x20802a0a:  /* CE_GET_ALL_CAPS */
+	case 0x20802a0b: { /* CE_GET_ALL_PHYSICAL_CAPS: 128 caps + 8 present */
+		unsigned int present_lo = 0, present_hi = 0;
+		if (size < 136)
+			return;
+		if (read_child(pid, pParams + 128, &present_lo, 4))
+			return;
+		if (read_child(pid, pParams + 132, &present_hi, 4))
+			return;
+		fprintf(stderr, "[iot]     ce all-caps 0x%x present=0x%x%08x\n",
+			cmd, present_hi, present_lo);
+		break;
+	}
+	default:
+		break;
+	}
+}
+
 static void dump_control(pid_t pid, unsigned long arg)
 {
 	unsigned int v[8];
@@ -78,6 +165,7 @@ static void dump_control(pid_t pid, unsigned long arg)
 	fprintf(stderr,
 		"[iot]   control client=0x%x object=0x%x cmd=0x%x params=0x%llx size=%u st=0x%x\n",
 		v[0], v[1], cmd, pParams, v[5], v[7]);
+	decode_ctrl_reply(pid, cmd, pParams, v[5]);
 }
 
 int main(int argc, char **argv)