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[AMD Official Use Only] From: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> on behalf of Candice Li <candice.li@xxxxxxx>
Sent: Monday, April 18, 2022 11:09 AM To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx <amd-gfx@xxxxxxxxxxxxxxxxxxxxx> Cc: Li, Candice <Candice.Li@xxxxxxx>; Clements, John <John.Clements@xxxxxxx> Subject: [PATCH 2/2] drm/amdgpu: Add debugfs TA load/unload/invoke support Add debugfs support to load/unload/invoke TA in runtime.
Signed-off-by: John Clements <john.clements@xxxxxxx> Signed-off-by: Candice Li <candice.li@xxxxxxx> --- drivers/gpu/drm/amd/amdgpu/Makefile | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 2 + drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c | 312 ++++++++++++++++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.h | 30 ++ 4 files changed, 345 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.h diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile index 7d7af43a258f83..b525f9be9326f4 100644 --- a/drivers/gpu/drm/amd/amdgpu/Makefile +++ b/drivers/gpu/drm/amd/amdgpu/Makefile @@ -58,7 +58,7 @@ amdgpu-y += amdgpu_device.o amdgpu_kms.o \ amdgpu_vm_sdma.o amdgpu_discovery.o amdgpu_ras_eeprom.o amdgpu_nbio.o \ amdgpu_umc.o smu_v11_0_i2c.o amdgpu_fru_eeprom.o amdgpu_rap.o \ amdgpu_fw_attestation.o amdgpu_securedisplay.o \ - amdgpu_eeprom.o amdgpu_mca.o + amdgpu_eeprom.o amdgpu_mca.o amdgpu_psp_ta.o amdgpu-$(CONFIG_PROC_FS) += amdgpu_fdinfo.o diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c index 13e4d8f9b87449..eedb12f6b8a32d 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c @@ -38,6 +38,7 @@ #include "amdgpu_umr.h" #include "amdgpu_reset.h" +#include "amdgpu_psp_ta.h" #if defined(CONFIG_DEBUG_FS) @@ -1767,6 +1768,7 @@ int amdgpu_debugfs_init(struct amdgpu_device *adev) DRM_ERROR("registering register debugfs failed (%d).\n", r); amdgpu_debugfs_firmware_init(adev); + amdgpu_ta_if_debugfs_init(adev); #if defined(CONFIG_DRM_AMD_DC) if (amdgpu_device_has_dc_support(adev)) 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 00000000000000..916bf3f6fce0d4 --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c @@ -0,0 +1,312 @@ +/* + * 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" + +static const char *TA_IF_FS_NAME = "ta_if"; + +struct dentry *dir; +struct dentry *ta_load_debugfs_dentry; +struct dentry *ta_unload_debugfs_dentry; +struct dentry *ta_invoke_debugfs_dentry; [kevin]:
make
above variable as static is better for this case, but it seems it is not used in this patch?
if
so, you will get a "defined but not used" error, when turn on build option " -Werror=unused-variable".
Best
Regards,
Kevin
+ +static ssize_t ta_if_load_debugfs_read(struct file *fp, char *buf, size_t len, loff_t *off); +static ssize_t ta_if_unload_debugfs_read(struct file *fp, char *buf, size_t len, loff_t *off); +static ssize_t ta_if_invoke_debugfs_read(struct file *fp, 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 uint32_t get_shared_buf_size(uint32_t shared_buf_len) +{ + return (shared_buf_len % PAGE_SIZE) ? + (shared_buf_len/PAGE_SIZE + 1) * PAGE_SIZE : + shared_buf_len; [kevin]:
and why not use write operation instead of read (load/unload/invoke)
? this seems more reasonable.
Best Regards,
Kevin
+}
+ +static void prep_ta_mem_context(struct psp_context *psp, + struct ta_context *context, + uint8_t *shared_buf, + uint32_t shared_buf_len) +{ + context->mem_context.shared_mem_size = get_shared_buf_size(shared_buf_len); + psp_ta_init_shared_buf(psp, &context->mem_context); + + memcpy((void *)context->mem_context.shared_buf, shared_buf, shared_buf_len); +} + +static bool is_ta_type_valid(enum ta_type_id ta_type) +{ + bool ret = false; + + switch (ta_type) { + case TA_TYPE_RAS: + ret = true; + break; + default: + break; + } + + return ret; +} + +static const struct file_operations ta_load_debugfs_fops = { + .read = ta_if_load_debugfs_read, + .llseek = default_llseek, + .owner = THIS_MODULE +}; + +static const struct file_operations ta_unload_debugfs_fops = { + .read = ta_if_unload_debugfs_read, + .llseek = default_llseek, + .owner = THIS_MODULE +}; + +static const struct file_operations ta_invoke_debugfs_fops = { + .read = ta_if_invoke_debugfs_read, + .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 ID (4bytes) + * - TA CMD ID (4bytes) + * - TA shard buf length (4bytes) + * - TA shared buf + * Receive buffer: + * - TA shared buf + * + * - For TA unload debugfs interface: + * Transmit buffer: + * - TA ID (4bytes) + */ + +static ssize_t ta_if_load_debugfs_read(struct file *fp, 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 = {0}; + + if ((fp == NULL) || (buf == NULL)) + return -EINVAL; + + ret = copy_from_user((void *)&ta_type, &buf[copy_pos], sizeof(uint32_t)); + if (ret || (!is_ta_type_valid(ta_type))) + return -EINVAL; + + copy_pos += sizeof(uint32_t); + + ret = copy_from_user((void *)&ta_bin_len, &buf[copy_pos], sizeof(uint32_t)); + if (ret) + return -EINVAL; + + copy_pos += sizeof(uint32_t); + + ta_bin = kzalloc(ta_bin_len, GFP_KERNEL); + if (!ta_bin) + ret = -ENOMEM; + ret = copy_from_user((void *)ta_bin, &buf[copy_pos], ta_bin_len); + if (ret) + goto err_free_bin; + + ret = psp_ras_terminate(psp); + if (ret) { + dev_err(adev->dev, "Failed to unload embedded RAS TA\n"); + goto err_free_bin; + } + + context.ta_type = ta_type; + context.ta_load_type = GFX_CMD_ID_LOAD_TA; + 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; + + ret = psp_ta_load(psp, &context); + + if (ret || context.resp_status) { + dev_err(adev->dev, "TA load via debugfs failed (%d) status %d\n", + ret, context.resp_status); + goto err_free_bin; + } + + context.initialized = true; + ret = copy_to_user((char *)buf, (void *)&context.session_id, sizeof(uint32_t)); + +err_free_bin: + kfree(ta_bin); + + return ret; +} + +static ssize_t ta_if_unload_debugfs_read(struct file *fp, char *buf, size_t len, loff_t *off) +{ + uint32_t ta_id = 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 = {0}; + + if ((fp == NULL) || (buf == NULL)) + return -1; + + ret = copy_from_user((void *)&ta_id, buf, sizeof(uint32_t)); + if (ret) + return -EINVAL; + + context.session_id = ta_id; + + ret = psp_ta_unload(psp, &context); + if (!ret) + context.initialized = false; + + return ret; +} + +static ssize_t ta_if_invoke_debugfs_read(struct file *fp, char *buf, size_t len, loff_t *off)
+{
+ 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 = {0}; + + if ((fp == NULL) || (buf == NULL)) + return -EINVAL; [kevin]:
“if ((fp == NULL) ..."
The linux kernel will
automatically create struct file instance when you open the file, even if you do not provide a callback function (in fops)
[kevin]:
you should add some check here to avoid that the user buf is overflow.
e.g: If the length of the user buf is less than that required, an error should be returned directly
+
+ ret = copy_from_user((void *)&ta_id, &buf[copy_pos], sizeof(uint32_t)); + if (ret) + return -EINVAL; + copy_pos += sizeof(uint32_t); + + ret = copy_from_user((void *)&cmd_id, &buf[copy_pos], sizeof(uint32_t)); + if (ret) + return -EINVAL; + copy_pos += sizeof(uint32_t); + + ret = copy_from_user((void *)&shared_buf_len, &buf[copy_pos], sizeof(uint32_t)); + if (ret) + return -EINVAL; + copy_pos += sizeof(uint32_t); + + shared_buf = kzalloc(shared_buf_len, GFP_KERNEL); + if (!shared_buf) + ret = -ENOMEM; + ret = copy_from_user((void *)shared_buf, &buf[copy_pos], shared_buf_len); + if (ret) + goto err_free_shared_buf; + + context.session_id = ta_id; + + prep_ta_mem_context(psp, &context, shared_buf, shared_buf_len); + + ret = psp_ta_invoke_indirect(psp, cmd_id, &context); + + if (ret || context.resp_status) { + dev_err(adev->dev, "TA invoke via debugfs failed (%d) status %d\n", + ret, context.resp_status); + goto err_free_ta_shared_buf; + } + + ret = copy_to_user((char *)buf, context.mem_context.shared_buf, shared_buf_len); + +err_free_ta_shared_buf: + psp_ta_free_shared_buf(&context.mem_context); + +err_free_shared_buf: + kfree(shared_buf); + + return ret; +} + +static struct dentry *amdgpu_ta_if_debugfs_create(struct amdgpu_device *adev) +{ + struct drm_minor *minor = adev_to_drm(adev)->primary; + + dir = debugfs_create_dir(TA_IF_FS_NAME, minor->debugfs_root); + + ta_load_debugfs_dentry = debugfs_create_file("ta_load", 0400, dir, adev, + &ta_load_debugfs_fops); + + ta_unload_debugfs_dentry = debugfs_create_file("ta_unload", 0400, dir, + adev, &ta_unload_debugfs_fops); + + ta_invoke_debugfs_dentry = debugfs_create_file("ta_invoke", 0400, dir, + adev, &ta_invoke_debugfs_fops); + return dir; +} + +void amdgpu_ta_if_debugfs_init(struct amdgpu_device *adev) +{ +#if defined(CONFIG_DEBUG_FS) + dir = amdgpu_ta_if_debugfs_create(adev); +#endif +} + +void amdgpu_ta_if_debugfs_remove(void) +{ + debugfs_remove_recursive(dir); +} diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.h new file mode 100644 index 00000000000000..883f89d57616d0 --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.h @@ -0,0 +1,30 @@ +/* + * 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. + * + */ + +#ifndef __AMDGPU_PSP_TA_H__ +#define __AMDGPU_PSP_TA_H__ + +void amdgpu_ta_if_debugfs_init(struct amdgpu_device *adev); +void amdgpu_ta_if_debugfs_remove(void); + +#endif -- 2.17.1 |
