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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef GSP_PHYS_VBIOS_H
#define GSP_PHYS_VBIOS_H
#include <linux/types.h>
#include <linux/pci.h>
/*
* Real-GSP boot stage 3c support: video-BIOS access and parsing.
*
* The FWSEC image that verifies and carves WPR2 is not part of the GSP-RM
* firmware file - it ships in the GPU's own VBIOS. This module reads the
* VBIOS through the PROM window while the physical GPU is claimed, walks the
* legacy PCI ROM header / ROM directory, then finds the BIOS Information
* Table (BIT) and the FWSEC falcon-ucode entry in the expansion ROM.
*
* All accesses are read-only. Disabled unless stage 3c is enabled
* (gsp_phys_fwsec=1); claim must be enabled too.
*/
/* Upper bound used by the distribution driver's ROM extraction (1 MB). */
#define GSP_PHYS_VBIOS_MAX_SIZE 0x00100000
/* PROM data window in BAR0: NV_PROM_DATA(i), 32-bit reads only. */
#define GSP_PHYS_VBIOS_PROM_WINDOW 0x00300000
/* FWSEC ucode application ids in the BIT falcon-ucode table. */
#define GSP_PHYS_FWSEC_APPID_FIRMWARE_SEC_LIC 0x05
#define GSP_PHYS_FWSEC_APPID_DEBUG 0x45
#define GSP_PHYS_FWSEC_APPID_PROD 0x85
struct gsp_phys_vbios {
u8 *data; /* copied VBIOS image (host memory) */
size_t size; /* usable image size in bytes */
u32 pci_offset; /* image start offset of the base ROM */
u32 expansion_rom_offset; /* expansion ROM base, from image start */
u64 version; /* (binary version << 8) | OEM, 0 if absent */
};
/*
* FWSEC falcon-ucode descriptor as found in the BIT. Only the V2 variant is
* accepted: on this GPU generation the security falcon cannot boot the V3
* (boot-from-HS) form, so a V3 descriptor is a hard stop.
*/
struct gsp_phys_fwsec_desc {
u32 app_id;
u32 target_id;
u32 desc_version;
u32 desc_size;
u32 desc_offset; /* offset of the descriptor in the image */
u32 imem_phys_base;
u32 imem_load_size;
u32 imem_virt_base;
u32 imem_sec_base;
u32 imem_sec_size;
u32 dmem_offset;
u32 dmem_phys_base;
u32 dmem_load_size;
u32 interface_offset;
u32 virtual_entry;
};
int gsp_phys_vbios_read(struct gsp_phys_vbios *img, struct pci_dev *pdev,
void __iomem *bar0);
void gsp_phys_vbios_free(struct gsp_phys_vbios *img);
int gsp_phys_vbios_parse_fwsec(const struct gsp_phys_vbios *img,
bool use_debug_app,
struct gsp_phys_fwsec_desc *desc);
#endif /* GSP_PHYS_VBIOS_H */
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