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Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c')
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c395
1 files changed, 395 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c
new file mode 100644
index 000000000..468a67b30
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c
@@ -0,0 +1,395 @@
+/*
+ * Copyright 2022 Advanced Micro Devices, Inc.
+ *
+ * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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 "amdgpu.h"
+#include "amdgpu_psp_ta.h"
+
+#if defined(CONFIG_DEBUG_FS)
+
+static ssize_t ta_if_load_debugfs_write(struct file *fp, const char *buf,
+ size_t len, loff_t *off);
+static ssize_t ta_if_unload_debugfs_write(struct file *fp, const char *buf,
+ size_t len, loff_t *off);
+static ssize_t ta_if_invoke_debugfs_write(struct file *fp, const char *buf,
+ size_t len, loff_t *off);
+
+static uint32_t get_bin_version(const uint8_t *bin)
+{
+ const struct common_firmware_header *hdr =
+ (const struct common_firmware_header *)bin;
+
+ return hdr->ucode_version;
+}
+
+static int prep_ta_mem_context(struct ta_mem_context *mem_context,
+ uint8_t *shared_buf,
+ uint32_t shared_buf_len)
+{
+ if (mem_context->shared_mem_size < shared_buf_len)
+ return -EINVAL;
+ memset(mem_context->shared_buf, 0, mem_context->shared_mem_size);
+ memcpy((void *)mem_context->shared_buf, shared_buf, shared_buf_len);
+
+ return 0;
+}
+
+static bool is_ta_type_valid(enum ta_type_id ta_type)
+{
+ switch (ta_type) {
+ case TA_TYPE_RAS:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct ta_funcs ras_ta_funcs = {
+ .fn_ta_initialize = psp_ras_initialize,
+ .fn_ta_invoke = psp_ras_invoke,
+ .fn_ta_terminate = psp_ras_terminate
+};
+
+static void set_ta_context_funcs(struct psp_context *psp,
+ enum ta_type_id ta_type,
+ struct ta_context **pcontext)
+{
+ switch (ta_type) {
+ case TA_TYPE_RAS:
+ *pcontext = &psp->ras_context.context;
+ psp->ta_funcs = &ras_ta_funcs;
+ break;
+ default:
+ break;
+ }
+}
+
+static const struct file_operations ta_load_debugfs_fops = {
+ .write = ta_if_load_debugfs_write,
+ .llseek = default_llseek,
+ .owner = THIS_MODULE
+};
+
+static const struct file_operations ta_unload_debugfs_fops = {
+ .write = ta_if_unload_debugfs_write,
+ .llseek = default_llseek,
+ .owner = THIS_MODULE
+};
+
+static const struct file_operations ta_invoke_debugfs_fops = {
+ .write = ta_if_invoke_debugfs_write,
+ .llseek = default_llseek,
+ .owner = THIS_MODULE
+};
+
+/*
+ * DOC: AMDGPU TA debugfs interfaces
+ *
+ * Three debugfs interfaces can be opened by a program to
+ * load/invoke/unload TA,
+ *
+ * - /sys/kernel/debug/dri/<N>/ta_if/ta_load
+ * - /sys/kernel/debug/dri/<N>/ta_if/ta_invoke
+ * - /sys/kernel/debug/dri/<N>/ta_if/ta_unload
+ *
+ * How to use the interfaces in a program?
+ *
+ * A program needs to provide transmit buffer to the interfaces
+ * and will receive buffer from the interfaces below,
+ *
+ * - For TA load debugfs interface:
+ * Transmit buffer:
+ * - TA type (4bytes)
+ * - TA bin length (4bytes)
+ * - TA bin
+ * Receive buffer:
+ * - TA ID (4bytes)
+ *
+ * - For TA invoke debugfs interface:
+ * Transmit buffer:
+ * - TA type (4bytes)
+ * - TA ID (4bytes)
+ * - TA CMD ID (4bytes)
+ * - TA shard buf length
+ * (4bytes, value not beyond TA shared memory size)
+ * - TA shared buf
+ * Receive buffer:
+ * - TA shared buf
+ *
+ * - For TA unload debugfs interface:
+ * Transmit buffer:
+ * - TA type (4bytes)
+ * - TA ID (4bytes)
+ */
+
+static ssize_t ta_if_load_debugfs_write(struct file *fp, const char *buf, size_t len, loff_t *off)
+{
+ uint32_t ta_type = 0;
+ uint32_t ta_bin_len = 0;
+ uint8_t *ta_bin = NULL;
+ uint32_t copy_pos = 0;
+ int ret = 0;
+
+ struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(fp)->i_private;
+ struct psp_context *psp = &adev->psp;
+ struct ta_context *context = NULL;
+
+ if (!buf)
+ return -EINVAL;
+
+ ret = copy_from_user((void *)&ta_type, &buf[copy_pos], sizeof(uint32_t));
+ if (ret || (!is_ta_type_valid(ta_type)))
+ return -EFAULT;
+
+ copy_pos += sizeof(uint32_t);
+
+ ret = copy_from_user((void *)&ta_bin_len, &buf[copy_pos], sizeof(uint32_t));
+ if (ret)
+ return -EFAULT;
+
+ copy_pos += sizeof(uint32_t);
+
+ ta_bin = kzalloc(ta_bin_len, GFP_KERNEL);
+ if (!ta_bin)
+ return -ENOMEM;
+ if (copy_from_user((void *)ta_bin, &buf[copy_pos], ta_bin_len)) {
+ ret = -EFAULT;
+ goto err_free_bin;
+ }
+
+ /* Set TA context and functions */
+ set_ta_context_funcs(psp, ta_type, &context);
+
+ if (!psp->ta_funcs || !psp->ta_funcs->fn_ta_terminate) {
+ dev_err(adev->dev, "Unsupported function to terminate TA\n");
+ ret = -EOPNOTSUPP;
+ goto err_free_bin;
+ }
+
+ /*
+ * Allocate TA shared buf in case shared buf was freed
+ * due to loading TA failed before.
+ */
+ if (!context->mem_context.shared_buf) {
+ ret = psp_ta_init_shared_buf(psp, &context->mem_context);
+ if (ret) {
+ ret = -ENOMEM;
+ goto err_free_bin;
+ }
+ }
+
+ ret = psp_fn_ta_terminate(psp);
+ if (ret || context->resp_status) {
+ dev_err(adev->dev,
+ "Failed to unload embedded TA (%d) and status (0x%X)\n",
+ ret, context->resp_status);
+ if (!ret)
+ ret = -EINVAL;
+ goto err_free_ta_shared_buf;
+ }
+
+ /* Prepare TA context for TA initialization */
+ context->ta_type = ta_type;
+ context->bin_desc.fw_version = get_bin_version(ta_bin);
+ context->bin_desc.size_bytes = ta_bin_len;
+ context->bin_desc.start_addr = ta_bin;
+
+ if (!psp->ta_funcs->fn_ta_initialize) {
+ dev_err(adev->dev, "Unsupported function to initialize TA\n");
+ ret = -EOPNOTSUPP;
+ goto err_free_ta_shared_buf;
+ }
+
+ ret = psp_fn_ta_initialize(psp);
+ if (ret || context->resp_status) {
+ dev_err(adev->dev, "Failed to load TA via debugfs (%d) and status (0x%X)\n",
+ ret, context->resp_status);
+ if (!ret)
+ ret = -EINVAL;
+ goto err_free_ta_shared_buf;
+ }
+
+ if (copy_to_user((char *)buf, (void *)&context->session_id, sizeof(uint32_t)))
+ ret = -EFAULT;
+
+err_free_ta_shared_buf:
+ /* Only free TA shared buf when returns error code */
+ if (ret && context->mem_context.shared_buf)
+ psp_ta_free_shared_buf(&context->mem_context);
+err_free_bin:
+ kfree(ta_bin);
+
+ return ret;
+}
+
+static ssize_t ta_if_unload_debugfs_write(struct file *fp, const char *buf, size_t len, loff_t *off)
+{
+ uint32_t ta_type = 0;
+ uint32_t ta_id = 0;
+ uint32_t copy_pos = 0;
+ int ret = 0;
+
+ struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(fp)->i_private;
+ struct psp_context *psp = &adev->psp;
+ struct ta_context *context = NULL;
+
+ if (!buf)
+ return -EINVAL;
+
+ ret = copy_from_user((void *)&ta_type, &buf[copy_pos], sizeof(uint32_t));
+ if (ret || (!is_ta_type_valid(ta_type)))
+ return -EFAULT;
+
+ copy_pos += sizeof(uint32_t);
+
+ ret = copy_from_user((void *)&ta_id, &buf[copy_pos], sizeof(uint32_t));
+ if (ret)
+ return -EFAULT;
+
+ set_ta_context_funcs(psp, ta_type, &context);
+ context->session_id = ta_id;
+
+ if (!psp->ta_funcs || !psp->ta_funcs->fn_ta_terminate) {
+ dev_err(adev->dev, "Unsupported function to terminate TA\n");
+ return -EOPNOTSUPP;
+ }
+
+ ret = psp_fn_ta_terminate(psp);
+ if (ret || context->resp_status) {
+ dev_err(adev->dev, "Failed to unload TA via debugfs (%d) and status (0x%X)\n",
+ ret, context->resp_status);
+ if (!ret)
+ ret = -EINVAL;
+ }
+
+ if (context->mem_context.shared_buf)
+ psp_ta_free_shared_buf(&context->mem_context);
+
+ return ret;
+}
+
+static ssize_t ta_if_invoke_debugfs_write(struct file *fp, const char *buf, size_t len, loff_t *off)
+{
+ uint32_t ta_type = 0;
+ uint32_t ta_id = 0;
+ uint32_t cmd_id = 0;
+ uint32_t shared_buf_len = 0;
+ uint8_t *shared_buf = NULL;
+ uint32_t copy_pos = 0;
+ int ret = 0;
+
+ struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(fp)->i_private;
+ struct psp_context *psp = &adev->psp;
+ struct ta_context *context = NULL;
+
+ if (!buf)
+ return -EINVAL;
+
+ ret = copy_from_user((void *)&ta_type, &buf[copy_pos], sizeof(uint32_t));
+ if (ret)
+ return -EFAULT;
+ copy_pos += sizeof(uint32_t);
+
+ ret = copy_from_user((void *)&ta_id, &buf[copy_pos], sizeof(uint32_t));
+ if (ret)
+ return -EFAULT;
+ copy_pos += sizeof(uint32_t);
+
+ ret = copy_from_user((void *)&cmd_id, &buf[copy_pos], sizeof(uint32_t));
+ if (ret)
+ return -EFAULT;
+ copy_pos += sizeof(uint32_t);
+
+ ret = copy_from_user((void *)&shared_buf_len, &buf[copy_pos], sizeof(uint32_t));
+ if (ret)
+ return -EFAULT;
+ copy_pos += sizeof(uint32_t);
+
+ shared_buf = kzalloc(shared_buf_len, GFP_KERNEL);
+ if (!shared_buf)
+ return -ENOMEM;
+ if (copy_from_user((void *)shared_buf, &buf[copy_pos], shared_buf_len)) {
+ ret = -EFAULT;
+ goto err_free_shared_buf;
+ }
+
+ set_ta_context_funcs(psp, ta_type, &context);
+
+ if (!context->initialized) {
+ dev_err(adev->dev, "TA is not initialized\n");
+ ret = -EINVAL;
+ goto err_free_shared_buf;
+ }
+
+ if (!psp->ta_funcs || !psp->ta_funcs->fn_ta_invoke) {
+ dev_err(adev->dev, "Unsupported function to invoke TA\n");
+ ret = -EOPNOTSUPP;
+ goto err_free_shared_buf;
+ }
+
+ context->session_id = ta_id;
+
+ ret = prep_ta_mem_context(&context->mem_context, shared_buf, shared_buf_len);
+ if (ret)
+ goto err_free_shared_buf;
+
+ ret = psp_fn_ta_invoke(psp, cmd_id);
+ if (ret || context->resp_status) {
+ dev_err(adev->dev, "Failed to invoke TA via debugfs (%d) and status (0x%X)\n",
+ ret, context->resp_status);
+ if (!ret) {
+ ret = -EINVAL;
+ goto err_free_shared_buf;
+ }
+ }
+
+ if (copy_to_user((char *)buf, context->mem_context.shared_buf, shared_buf_len))
+ ret = -EFAULT;
+
+err_free_shared_buf:
+ kfree(shared_buf);
+
+ return ret;
+}
+
+void amdgpu_ta_if_debugfs_init(struct amdgpu_device *adev)
+{
+ struct drm_minor *minor = adev_to_drm(adev)->primary;
+
+ struct dentry *dir = debugfs_create_dir("ta_if", minor->debugfs_root);
+
+ debugfs_create_file("ta_load", 0200, dir, adev,
+ &ta_load_debugfs_fops);
+
+ debugfs_create_file("ta_unload", 0200, dir,
+ adev, &ta_unload_debugfs_fops);
+
+ debugfs_create_file("ta_invoke", 0200, dir,
+ adev, &ta_invoke_debugfs_fops);
+}
+
+#else
+void amdgpu_ta_if_debugfs_init(struct amdgpu_device *adev)
+{
+
+}
+#endif
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