diff options
Diffstat (limited to 'drivers/gpu/drm/imagination/pvr_fw.c')
| -rw-r--r-- | drivers/gpu/drm/imagination/pvr_fw.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imagination/pvr_fw.c b/drivers/gpu/drm/imagination/pvr_fw.c new file mode 100644 index 000000000000..a9377c735c9c --- /dev/null +++ b/drivers/gpu/drm/imagination/pvr_fw.c @@ -0,0 +1,145 @@ +// SPDX-License-Identifier: GPL-2.0-only OR MIT +/* Copyright (c) 2023 Imagination Technologies Ltd. */ + +#include "pvr_device.h" +#include "pvr_device_info.h" +#include "pvr_fw.h" + +#include <drm/drm_drv.h> +#include <linux/firmware.h> +#include <linux/sizes.h> + +#define FW_MAX_SUPPORTED_MAJOR_VERSION 1 + +/** + * pvr_fw_validate() - Parse firmware header and check compatibility + * @pvr_dev: Device pointer. + * + * Returns: + * * 0 on success, or + * * -EINVAL if firmware is incompatible. + */ +static int +pvr_fw_validate(struct pvr_device *pvr_dev) +{ + struct drm_device *drm_dev = from_pvr_device(pvr_dev); + const struct firmware *firmware = pvr_dev->fw_dev.firmware; + const struct pvr_fw_layout_entry *layout_entries; + const struct pvr_fw_info_header *header; + const u8 *fw = firmware->data; + u32 fw_offset = firmware->size - SZ_4K; + u32 layout_table_size; + u32 entry; + + if (firmware->size < SZ_4K || (firmware->size % FW_BLOCK_SIZE)) + return -EINVAL; + + header = (const struct pvr_fw_info_header *)&fw[fw_offset]; + + if (header->info_version != PVR_FW_INFO_VERSION) { + drm_err(drm_dev, "Unsupported fw info version %u\n", + header->info_version); + return -EINVAL; + } + + if (header->header_len != sizeof(struct pvr_fw_info_header) || + header->layout_entry_size != sizeof(struct pvr_fw_layout_entry) || + header->layout_entry_num > PVR_FW_INFO_MAX_NUM_ENTRIES) { + drm_err(drm_dev, "FW info format mismatch\n"); + return -EINVAL; + } + + if (!(header->flags & PVR_FW_FLAGS_OPEN_SOURCE) || + header->fw_version_major > FW_MAX_SUPPORTED_MAJOR_VERSION || + header->fw_version_major == 0) { + drm_err(drm_dev, "Unsupported FW version %u.%u (build: %u%s)\n", + header->fw_version_major, header->fw_version_minor, + header->fw_version_build, + (header->flags & PVR_FW_FLAGS_OPEN_SOURCE) ? " OS" : ""); + return -EINVAL; + } + + if (pvr_gpu_id_to_packed_bvnc(&pvr_dev->gpu_id) != header->bvnc) { + struct pvr_gpu_id fw_gpu_id; + + packed_bvnc_to_pvr_gpu_id(header->bvnc, &fw_gpu_id); + drm_err(drm_dev, "FW built for incorrect GPU ID %i.%i.%i.%i (expected %i.%i.%i.%i)\n", + fw_gpu_id.b, fw_gpu_id.v, fw_gpu_id.n, fw_gpu_id.c, + pvr_dev->gpu_id.b, pvr_dev->gpu_id.v, pvr_dev->gpu_id.n, pvr_dev->gpu_id.c); + return -EINVAL; + } + + fw_offset += header->header_len; + layout_table_size = + header->layout_entry_size * header->layout_entry_num; + if ((fw_offset + layout_table_size) > firmware->size) + return -EINVAL; + + layout_entries = (const struct pvr_fw_layout_entry *)&fw[fw_offset]; + for (entry = 0; entry < header->layout_entry_num; entry++) { + u32 start_addr = layout_entries[entry].base_addr; + u32 end_addr = start_addr + layout_entries[entry].alloc_size; + + if (start_addr >= end_addr) + return -EINVAL; + } + + fw_offset = (firmware->size - SZ_4K) - header->device_info_size; + + drm_info(drm_dev, "FW version v%u.%u (build %u OS)\n", header->fw_version_major, + header->fw_version_minor, header->fw_version_build); + + pvr_dev->fw_version.major = header->fw_version_major; + pvr_dev->fw_version.minor = header->fw_version_minor; + + pvr_dev->fw_dev.header = header; + pvr_dev->fw_dev.layout_entries = layout_entries; + + return 0; +} + +static int +pvr_fw_get_device_info(struct pvr_device *pvr_dev) +{ + const struct firmware *firmware = pvr_dev->fw_dev.firmware; + struct pvr_fw_device_info_header *header; + const u8 *fw = firmware->data; + const u64 *dev_info; + u32 fw_offset; + + fw_offset = (firmware->size - SZ_4K) - pvr_dev->fw_dev.header->device_info_size; + + header = (struct pvr_fw_device_info_header *)&fw[fw_offset]; + dev_info = (u64 *)(header + 1); + + pvr_device_info_set_quirks(pvr_dev, dev_info, header->brn_mask_size); + dev_info += header->brn_mask_size; + + pvr_device_info_set_enhancements(pvr_dev, dev_info, header->ern_mask_size); + dev_info += header->ern_mask_size; + + return pvr_device_info_set_features(pvr_dev, dev_info, header->feature_mask_size, + header->feature_param_size); +} + +/** + * pvr_fw_validate_init_device_info() - Validate firmware and initialise device information + * @pvr_dev: Target PowerVR device. + * + * This function must be called before querying device information. + * + * Returns: + * * 0 on success, or + * * -%EINVAL if firmware validation fails. + */ +int +pvr_fw_validate_init_device_info(struct pvr_device *pvr_dev) +{ + int err; + + err = pvr_fw_validate(pvr_dev); + if (err) + return err; + + return pvr_fw_get_device_info(pvr_dev); +} |