[PATCH 5/6] tools/dpf: Tool to read and write l3 remap registers.

Ben Widawsky
2012-05-25T23:58:31Z

tests/dpf_test | 8 +++
tools/Makefile.am | 3 +-
tools/intel_l3_parity.c | 159 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 169 insertions(+), 1 deletion(-)
create mode 100755 tests/dpf_test
create mode 100644 tools/intel_l3_parity.c

diff --git a/tests/dpf_test b/tests/dpf_test
new file mode 100755
index 0000000..7d431ac
--- /dev/null
+++ b/tests/dpf_test
@@ -0,0 +1,8 @@
+#!/bin/bash
+
+SOURCE_DIR="$( dirname "${BASH_SOURCE[0]}" )"
+. $SOURCE_DIR/drm_lib.sh
+
+$SOURCE_DIR/../tools/intel_l3_parity -c 2>&1
+$SOURCE_DIR/../tools/intel_l3_parity 0,0,0 2>&1
+$SOURCE_DIR/../tools/intel_l3_parity 2>&1
diff --git a/tools/Makefile.am b/tools/Makefile.am
index 2e4128b..d461f38 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -14,7 +14,8 @@ bin_PROGRAMS = \
intel_reg_snapshot \
intel_reg_write \
intel_reg_read \
- intel_forcewaked
+ intel_forcewaked \
+ intel_l3_parity

noinst_PROGRAMS = \
intel_dump_decode \
diff --git a/tools/intel_l3_parity.c b/tools/intel_l3_parity.c
new file mode 100644
index 0000000..260c3d0
--- /dev/null
+++ b/tools/intel_l3_parity.c
@@ -0,0 +1,159 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ * Ben Widawsky <ben@bwidawsk.net>
+ *
+ */
+
+#define _GNU_SOURCE
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "intel_chipset.h"
+#include "intel_gpu_tools.h"
+#include "drmtest.h"
+
+#define NUM_BANKS 4
+#define NUM_SUBBANKS 8
+#define NUM_REGS (NUM_BANKS * NUM_SUBBANKS)
+
+struct __attribute__ ((__packed__)) l3_log_register {
+ uint32_t row0_enable : 1;
+ uint32_t rsvd2 : 4;
+ uint32_t row0 : 11;
+ uint32_t row1_enable : 1;
+ uint32_t rsvd1 : 4;
+ uint32_t row1 : 11;
+} l3log[NUM_BANKS][NUM_SUBBANKS];
+
+static void dumpit(void)
+{
+ int i, j;
+
+ for (i = 0; i < NUM_BANKS; i++) {
+ for (j = 0; j < NUM_SUBBANKS; j++) {
+ struct l3_log_register *reg = &l3log[i][j];
+
+ if (reg->row0_enable)
+ printf("Row %d, Bank %d, Subbank %d is disabled\n",
+ reg->row0, i, j);
+ if (reg->row1_enable)
+ printf("Row %d, Bank %d, Subbank %d is disabled\n",
+ reg->row1, i, j);
+ }
+ }
+}
+
+static int disable_rbs(int row, int bank, int sbank)
+{
+ struct l3_log_register *reg = &l3log[bank][sbank];
+
+ // can't map more than 2 rows
+ if (reg->row0_enable && reg->row1_enable)
+ return -1;
+
+ // can't remap the same row twice
+ if ((reg->row0_enable && reg->row0 == row) ||
+ (reg->row1_enable && reg->row1 == row)) {
+ return -1;
+ }
+
+ if (reg->row0_enable) {
+ reg->row1 = row;
+ reg->row1_enable = 1;
+ } else {
+ reg->row0 = row;
+ reg->row0_enable = 1;
+ }
+
+ return 0;
+}
+
+static int do_parse(int argc, char *argv[])
+{
+ int row, bank, sbank, i, ret;
+
+ for (i = 1; i < argc; i++) {
+ ret = sscanf(argv[i], "%d,%d,%d", &row, &bank, &sbank);
+ if (ret != 3)
+ return i;
+ assert(disable_rbs(row, bank, sbank) == 0);
+ }
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ const int device = drm_get_card(0);
+ char *path;
+ unsigned int devid;
+ int drm_fd, fd, ret;
+
+ drm_fd = drm_open_any();
+ devid = intel_get_drm_devid(drm_fd);
+
+ ret = asprintf(&path, "/sys/class/drm/card%d/l3_parity", device);
+ assert(ret != -1);
+
+ fd = open(path, O_RDWR);
+ if (fd == -1 && IS_IVYBRIDGE(devid)) {
+ perror("Opening sysfs");
+ exit(EXIT_FAILURE);
+ } else if (fd == -1)
+ exit(EXIT_SUCCESS);
+
+ ret = read(fd, l3log, NUM_REGS * sizeof(uint32_t));
+ if (ret == -1) {
+ perror("Reading sysfs");
+ exit(EXIT_FAILURE);
+ }
+
+ assert(lseek(fd, 0, SEEK_SET) == 0);
+
+ if (argc == 1) {
+ dumpit();
+ exit(EXIT_SUCCESS);
+ } else if (!strncmp("-c", argv[1], 2)) {
+ memset(l3log, 0, sizeof(l3log));
+ } else {
+ ret = do_parse(argc, argv);
+ if (ret != 0) {
+ fprintf(stderr, "Malformed command line at %s\n", argv[ret]);
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ ret = write(fd, l3log, NUM_REGS * sizeof(uint32_t));
+ if (ret == -1) {
+ perror("Writing sysfs");
+ exit(EXIT_FAILURE);
+ }
+
+ close(fd);
+
+ exit(EXIT_SUCCESS);
+}
--
1.7.10.2

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org