[Intel-gfx] [PATCH 7/7] intel_gtt: Raw PTE dumper mode

[Ben Widawsky]

./tools/intel_gtt -d | head
GTT offset |                 PTEs
--------------------------------------------------------
  0x000000 | 0xe4005015 0xe2854015 0xe283e015 0xe283f015
  0x004000 | 0xe28ba015 0xe28bb015 0xe28b6015 0xe28b7015
  0x008000 | 0xe2828015 0xe2829015 0xe282a015 0xe282b015
  0x00c000 | 0xe2928015 0xe2929015 0xe292a015 0xe292b015
  0x010000 | 0xe2918015 0xe2919015 0xe291a015 0xe291b015
  0x014000 | 0xe291c015 0xe291d015 0xe291e015 0xe291f015
  0x018000 | 0xe2920015 0xe2921015 0xe2922015 0xe2923015
  0x01c000 | 0xe2924015 0xe2925015 0xe2926015 0xe2927015

Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
 tools/intel_gtt.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/tools/intel_gtt.c b/tools/intel_gtt.c
index acf63c1..090e88d 100644
--- a/tools/intel_gtt.c
+++ b/tools/intel_gtt.c
@@ -58,6 +58,25 @@ static uint64_t get_phys(uint32_t pt_offset)
 	return (phys | pae) & ~0xfff;
 }
 
+static void pte_dump(int size, uint32_t offset) {
+	int start;
+	/* Want to print 4 ptes at a time (4b PTE assumed). */
+	if (size % 16)
+		size = (size + 16) & ~0xffff;
+
+
+	printf("GTT offset |                 PTEs\n");
+	printf("--------------------------------------------------------\n");
+	for (start = 0; start < size; start += KB(16)) {
+		printf("  0x%06x | 0x%08x 0x%08x 0x%08x 0x%08x\n",
+				start,
+				INGTT(start + 0x0),
+				INGTT(start + 0x1000),
+				INGTT(start + 0x2000),
+				INGTT(start + 0x3000));
+	}
+}
+
 int main(int argc, char **argv)
 {
 	struct pci_device *pci_dev;
@@ -105,6 +124,10 @@ int main(int argc, char **argv)
 	}
 
 	aper_size = pci_dev->regions[2].size;
+	if (argc > 1 && !strncmp("-d", argv[1], 2)) {
+		pte_dump(aper_size, 0);
+		return 0;
+	}
 
 	for (start = 0; start < aper_size; start += KB(4)) {
 		uint64_t start_phys = get_phys(start);
-- 
1.8.4