gpu: nvgpu: vgpu: ecc sysfs support for vgpu

- fetch ecc info from RM server and create sysfs nodes
- new file ecc_vgpu.c for platform-independent code
- add 2 new commands: GET_ECC_INFO and GET_ECC_COUNTER_VALUE

JIRA EVLR-2590

Change-Id: I040a9fcd23326e432ca93e9a028319f9c1c570f0
Signed-off-by: Kyle Guo <kyleg@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1777428
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 92 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/vgpu/ecc_vgpu.c b/drivers/gpu/nvgpu/vgpu/ecc_vgpu.c
new file mode 100644
index 00000000..fa44e58f
--- /dev/null
+++ b/drivers/gpu/nvgpu/vgpu/ecc_vgpu.c
@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2018, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * 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 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.
+ */
+
+#include <nvgpu/kmem.h>
+#include <nvgpu/vgpu/vgpu_ivc.h>
+#include <nvgpu/vgpu/vgpu.h>
+#include <nvgpu/errno.h>
+
+#include "vgpu/ecc_vgpu.h"
+
+int vgpu_ecc_get_info(struct gk20a *g)
+{
+        struct vgpu_priv_data *priv = vgpu_get_priv_data(g);
+        struct tegra_vgpu_cmd_msg msg = {0};
+        struct tegra_vgpu_ecc_info_params *p = &msg.params.ecc_info;
+        struct tegra_vgpu_ecc_info_entry *entry;
+        struct vgpu_ecc_stat *stats;
+        void *handle;
+        int err, i, count;
+        size_t oob_size;
+
+        msg.cmd = TEGRA_VGPU_CMD_GET_ECC_INFO;
+        msg.handle = vgpu_get_handle(g);
+        err = vgpu_comm_sendrecv(&msg, sizeof(msg), sizeof(msg));
+        err = err ? err : msg.ret;
+        if (unlikely(err)) {
+                nvgpu_err(g, "vgpu get_ecc_info failed, err=%d", err);
+                return err;
+        }
+
+        count = p->ecc_stats_count;
+
+        handle = vgpu_ivc_oob_get_ptr(vgpu_ivc_get_server_vmid(),
+                                        TEGRA_VGPU_QUEUE_CMD,
+                                        (void **)&entry, &oob_size);
+        if (unlikely(!handle))
+                return -EINVAL;
+
+        if (unlikely(oob_size < count * sizeof(*entry))) {
+                err = -E2BIG;
+                goto out;
+        }
+
+        stats = nvgpu_kzalloc(g, count * sizeof(*stats));
+        if (unlikely(!stats)) {
+                err = -ENOMEM;
+                goto out;
+        }
+
+        for (i = 0; i < count; i++) {
+                stats[i].ecc_id = entry[i].ecc_id;
+                strncpy(stats[i].name, entry[i].name,
+                        NVGPU_ECC_STAT_NAME_MAX_SIZE);
+        }
+
+        priv->ecc_stats = stats;
+        priv->ecc_stats_count = count;
+out:
+        vgpu_ivc_oob_put_ptr(handle);
+        return err;
+}
+
+void vgpu_ecc_remove_info(struct gk20a *g)
+{
+        struct vgpu_priv_data *priv = vgpu_get_priv_data(g);
+
+        priv->ecc_stats_count = 0;
+
+        if (priv->ecc_stats) {
+                nvgpu_kfree(g, priv->ecc_stats);
+                priv->ecc_stats = NULL;
+        }
+}