cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/nouveau/nvkm/subdev/secboot/ls_ucode_gr.c

/*
 * Copyright (c) 2016, 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 "ls_ucode.h"
#include "acr.h"

#include <core/firmware.h>


#define BL_DESC_BLK_SIZE 256
/**
 * Build a ucode image and descriptor from provided bootloader, code and data.
 *
 * @bl:         bootloader image, including 16-bytes descriptor
 * @code:       LS firmware code segment
 * @data:       LS firmware data segment
 * @desc:       ucode descriptor to be written
 *
 * Return: allocated ucode image with corresponding descriptor information. desc
 *         is also updated to contain the right offsets within returned image.
 */

static void * ls_ucode_img_build(const struct firmware *bl, const struct firmware *code, const struct firmware *data, struct ls_ucode_img_desc *desc) { struct fw_bin_header *bin_hdr = (void *)bl->data; struct fw_bl_desc *bl_desc = (void *)bl->data + bin_hdr->header_offset; void *bl_data = (void *)bl->data + bin_hdr->data_offset; u32 pos = 0; void *image; desc->bootloader_start_offset = pos; desc->bootloader_size = ALIGN(bl_desc->code_size, sizeof(u32)); desc->bootloader_imem_offset = bl_desc->start_tag * 256; desc->bootloader_entry_point = bl_desc->start_tag * 256; pos = ALIGN(pos + desc->bootloader_size, BL_DESC_BLK_SIZE); desc->app_start_offset = pos; desc->app_size = ALIGN(code->size, BL_DESC_BLK_SIZE) + ALIGN(data->size, BL_DESC_BLK_SIZE); desc->app_imem_offset = 0; desc->app_imem_entry = 0; desc->app_dmem_offset = 0; desc->app_resident_code_offset = 0; desc->app_resident_code_size = ALIGN(code->size, BL_DESC_BLK_SIZE); pos = ALIGN(pos + desc->app_resident_code_size, BL_DESC_BLK_SIZE); desc->app_resident_data_offset = pos - desc->app_start_offset; desc->app_resident_data_size = ALIGN(data->size, BL_DESC_BLK_SIZE); desc->image_size = ALIGN(bl_desc->code_size, BL_DESC_BLK_SIZE) + desc->app_size; image = kzalloc(desc->image_size, GFP_KERNEL); if (!image) return ERR_PTR(-ENOMEM); memcpy(image + desc->bootloader_start_offset, bl_data, bl_desc->code_size); memcpy(image + desc->app_start_offset, code->data, code->size); memcpy(image + desc->app_start_offset + desc->app_resident_data_offset, data->data, data->size); return image; }

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Alexandre Courbot337100.00%1100.00%
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/** * ls_ucode_img_load_gr() - load and prepare a LS GR ucode image * * Load the LS microcode, bootloader and signature and pack them into a single * blob. Also generate the corresponding ucode descriptor. */
static int ls_ucode_img_load_gr(const struct nvkm_subdev *subdev, struct ls_ucode_img *img, const char *falcon_name) { const struct firmware *bl, *code, *data, *sig; char f[64]; int ret; snprintf(f, sizeof(f), "gr/%s_bl", falcon_name); ret = nvkm_firmware_get(subdev->device, f, &bl); if (ret) goto error; snprintf(f, sizeof(f), "gr/%s_inst", falcon_name); ret = nvkm_firmware_get(subdev->device, f, &code); if (ret) goto free_bl; snprintf(f, sizeof(f), "gr/%s_data", falcon_name); ret = nvkm_firmware_get(subdev->device, f, &data); if (ret) goto free_inst; snprintf(f, sizeof(f), "gr/%s_sig", falcon_name); ret = nvkm_firmware_get(subdev->device, f, &sig); if (ret) goto free_data; img->sig = kmemdup(sig->data, sig->size, GFP_KERNEL); if (!img->sig) { ret = -ENOMEM; goto free_sig; } img->sig_size = sig->size; img->ucode_data = ls_ucode_img_build(bl, code, data, &img->ucode_desc); if (IS_ERR(img->ucode_data)) { ret = PTR_ERR(img->ucode_data); goto free_data; } img->ucode_size = img->ucode_desc.image_size; free_sig: nvkm_firmware_put(sig); free_data: nvkm_firmware_put(data); free_inst: nvkm_firmware_put(code); free_bl: nvkm_firmware_put(bl); error: return ret; }

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Alexandre Courbot312100.00%2100.00%
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int acr_ls_ucode_load_fecs(const struct nvkm_subdev *subdev, struct ls_ucode_img *img) { return ls_ucode_img_load_gr(subdev, img, "fecs"); }

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Alexandre Courbot26100.00%1100.00%
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int acr_ls_ucode_load_gpccs(const struct nvkm_subdev *subdev, struct ls_ucode_img *img) { return ls_ucode_img_load_gr(subdev, img, "gpccs"); }

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Alexandre Courbot26100.00%1100.00%
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Overall Contributors

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Alexandre Courbot717100.00%2100.00%
Total717100.00%2100.00%
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