diff options
Diffstat (limited to 'drivers/gpu/drm/imagination/pvr_fw_mips.c')
| -rw-r--r-- | drivers/gpu/drm/imagination/pvr_fw_mips.c | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imagination/pvr_fw_mips.c b/drivers/gpu/drm/imagination/pvr_fw_mips.c new file mode 100644 index 000000000000..0bed0257e2ab --- /dev/null +++ b/drivers/gpu/drm/imagination/pvr_fw_mips.c @@ -0,0 +1,252 @@ +// SPDX-License-Identifier: GPL-2.0-only OR MIT +/* Copyright (c) 2023 Imagination Technologies Ltd. */ + +#include "pvr_device.h" +#include "pvr_fw.h" +#include "pvr_fw_mips.h" +#include "pvr_gem.h" +#include "pvr_rogue_mips.h" +#include "pvr_vm_mips.h" + +#include <linux/elf.h> +#include <linux/err.h> +#include <linux/types.h> + +#define ROGUE_FW_HEAP_MIPS_BASE 0xC0000000 +#define ROGUE_FW_HEAP_MIPS_SHIFT 24 /* 16 MB */ +#define ROGUE_FW_HEAP_MIPS_RESERVED_SIZE SZ_1M + +/** + * process_elf_command_stream() - Process ELF firmware image and populate + * firmware sections + * @pvr_dev: Device pointer. + * @fw: Pointer to firmware image. + * @fw_code_ptr: Pointer to FW code section. + * @fw_data_ptr: Pointer to FW data section. + * @fw_core_code_ptr: Pointer to FW coremem code section. + * @fw_core_data_ptr: Pointer to FW coremem data section. + * + * Returns : + * * 0 on success, or + * * -EINVAL on any error in ELF command stream. + */ +static int +process_elf_command_stream(struct pvr_device *pvr_dev, const u8 *fw, u8 *fw_code_ptr, + u8 *fw_data_ptr, u8 *fw_core_code_ptr, u8 *fw_core_data_ptr) +{ + struct elf32_hdr *header = (struct elf32_hdr *)fw; + struct elf32_phdr *program_header = (struct elf32_phdr *)(fw + header->e_phoff); + struct drm_device *drm_dev = from_pvr_device(pvr_dev); + u32 entry; + int err; + + for (entry = 0; entry < header->e_phnum; entry++, program_header++) { + void *write_addr; + + /* Only consider loadable entries in the ELF segment table */ + if (program_header->p_type != PT_LOAD) + continue; + + err = pvr_fw_find_mmu_segment(pvr_dev, program_header->p_vaddr, + program_header->p_memsz, fw_code_ptr, fw_data_ptr, + fw_core_code_ptr, fw_core_data_ptr, &write_addr); + if (err) { + drm_err(drm_dev, + "Addr 0x%x (size: %d) not found in any firmware segment", + program_header->p_vaddr, program_header->p_memsz); + return err; + } + + /* Write to FW allocation only if available */ + if (write_addr) { + memcpy(write_addr, fw + program_header->p_offset, + program_header->p_filesz); + + memset((u8 *)write_addr + program_header->p_filesz, 0, + program_header->p_memsz - program_header->p_filesz); + } + } + + return 0; +} + +static int +pvr_mips_init(struct pvr_device *pvr_dev) +{ + pvr_fw_heap_info_init(pvr_dev, ROGUE_FW_HEAP_MIPS_SHIFT, ROGUE_FW_HEAP_MIPS_RESERVED_SIZE); + + return pvr_vm_mips_init(pvr_dev); +} + +static void +pvr_mips_fini(struct pvr_device *pvr_dev) +{ + pvr_vm_mips_fini(pvr_dev); +} + +static int +pvr_mips_fw_process(struct pvr_device *pvr_dev, const u8 *fw, + u8 *fw_code_ptr, u8 *fw_data_ptr, u8 *fw_core_code_ptr, u8 *fw_core_data_ptr, + u32 core_code_alloc_size) +{ + struct pvr_fw_device *fw_dev = &pvr_dev->fw_dev; + struct pvr_fw_mips_data *mips_data = fw_dev->processor_data.mips_data; + const struct pvr_fw_layout_entry *boot_code_entry; + const struct pvr_fw_layout_entry *boot_data_entry; + const struct pvr_fw_layout_entry *exception_code_entry; + const struct pvr_fw_layout_entry *stack_entry; + struct rogue_mipsfw_boot_data *boot_data; + dma_addr_t dma_addr; + u32 page_nr; + int err; + + err = process_elf_command_stream(pvr_dev, fw, fw_code_ptr, fw_data_ptr, fw_core_code_ptr, + fw_core_data_ptr); + if (err) + return err; + + boot_code_entry = pvr_fw_find_layout_entry(pvr_dev, MIPS_BOOT_CODE); + boot_data_entry = pvr_fw_find_layout_entry(pvr_dev, MIPS_BOOT_DATA); + exception_code_entry = pvr_fw_find_layout_entry(pvr_dev, MIPS_EXCEPTIONS_CODE); + if (!boot_code_entry || !boot_data_entry || !exception_code_entry) + return -EINVAL; + + WARN_ON(pvr_gem_get_dma_addr(fw_dev->mem.code_obj->gem, boot_code_entry->alloc_offset, + &mips_data->boot_code_dma_addr)); + WARN_ON(pvr_gem_get_dma_addr(fw_dev->mem.data_obj->gem, boot_data_entry->alloc_offset, + &mips_data->boot_data_dma_addr)); + WARN_ON(pvr_gem_get_dma_addr(fw_dev->mem.code_obj->gem, + exception_code_entry->alloc_offset, + &mips_data->exception_code_dma_addr)); + + stack_entry = pvr_fw_find_layout_entry(pvr_dev, MIPS_STACK); + if (!stack_entry) + return -EINVAL; + + boot_data = (struct rogue_mipsfw_boot_data *)(fw_data_ptr + boot_data_entry->alloc_offset + + ROGUE_MIPSFW_BOOTLDR_CONF_OFFSET); + + WARN_ON(pvr_fw_object_get_dma_addr(fw_dev->mem.data_obj, stack_entry->alloc_offset, + &dma_addr)); + boot_data->stack_phys_addr = dma_addr; + + boot_data->reg_base = pvr_dev->regs_resource->start; + + for (page_nr = 0; page_nr < ARRAY_SIZE(boot_data->pt_phys_addr); page_nr++) { + /* Firmware expects 4k pages, but host page size might be different. */ + u32 src_page_nr = (page_nr * ROGUE_MIPSFW_PAGE_SIZE_4K) >> PAGE_SHIFT; + u32 page_offset = (page_nr * ROGUE_MIPSFW_PAGE_SIZE_4K) & ~PAGE_MASK; + + boot_data->pt_phys_addr[page_nr] = mips_data->pt_dma_addr[src_page_nr] + + page_offset; + } + + boot_data->pt_log2_page_size = ROGUE_MIPSFW_LOG2_PAGE_SIZE_4K; + boot_data->pt_num_pages = ROGUE_MIPSFW_MAX_NUM_PAGETABLE_PAGES; + boot_data->reserved1 = 0; + boot_data->reserved2 = 0; + + return 0; +} + +static int +pvr_mips_wrapper_init(struct pvr_device *pvr_dev) +{ + struct pvr_fw_mips_data *mips_data = pvr_dev->fw_dev.processor_data.mips_data; + const u64 remap_settings = ROGUE_MIPSFW_BOOT_REMAP_LOG2_SEGMENT_SIZE; + u32 phys_bus_width; + + int err = PVR_FEATURE_VALUE(pvr_dev, phys_bus_width, &phys_bus_width); + + if (WARN_ON(err)) + return err; + + /* Currently MIPS FW only supported with physical bus width > 32 bits. */ + if (WARN_ON(phys_bus_width <= 32)) + return -EINVAL; + + pvr_cr_write32(pvr_dev, ROGUE_CR_MIPS_WRAPPER_CONFIG, + (ROGUE_MIPSFW_REGISTERS_VIRTUAL_BASE >> + ROGUE_MIPSFW_WRAPPER_CONFIG_REGBANK_ADDR_ALIGN) | + ROGUE_CR_MIPS_WRAPPER_CONFIG_BOOT_ISA_MODE_MICROMIPS); + + /* Configure remap for boot code, boot data and exceptions code areas. */ + pvr_cr_write64(pvr_dev, ROGUE_CR_MIPS_ADDR_REMAP1_CONFIG1, + ROGUE_MIPSFW_BOOT_REMAP_PHYS_ADDR_IN | + ROGUE_CR_MIPS_ADDR_REMAP1_CONFIG1_MODE_ENABLE_EN); + pvr_cr_write64(pvr_dev, ROGUE_CR_MIPS_ADDR_REMAP1_CONFIG2, + (mips_data->boot_code_dma_addr & + ~ROGUE_CR_MIPS_ADDR_REMAP1_CONFIG2_ADDR_OUT_CLRMSK) | remap_settings); + + if (PVR_HAS_QUIRK(pvr_dev, 63553)) { + /* + * WA always required on 36 bit cores, to avoid continuous unmapped memory accesses + * to address 0x0. + */ + WARN_ON(phys_bus_width != 36); + + pvr_cr_write64(pvr_dev, ROGUE_CR_MIPS_ADDR_REMAP5_CONFIG1, + ROGUE_CR_MIPS_ADDR_REMAP5_CONFIG1_MODE_ENABLE_EN); + pvr_cr_write64(pvr_dev, ROGUE_CR_MIPS_ADDR_REMAP5_CONFIG2, + (mips_data->boot_code_dma_addr & + ~ROGUE_CR_MIPS_ADDR_REMAP5_CONFIG2_ADDR_OUT_CLRMSK) | + remap_settings); + } + + pvr_cr_write64(pvr_dev, ROGUE_CR_MIPS_ADDR_REMAP2_CONFIG1, + ROGUE_MIPSFW_DATA_REMAP_PHYS_ADDR_IN | + ROGUE_CR_MIPS_ADDR_REMAP2_CONFIG1_MODE_ENABLE_EN); + pvr_cr_write64(pvr_dev, ROGUE_CR_MIPS_ADDR_REMAP2_CONFIG2, + (mips_data->boot_data_dma_addr & + ~ROGUE_CR_MIPS_ADDR_REMAP2_CONFIG2_ADDR_OUT_CLRMSK) | remap_settings); + + pvr_cr_write64(pvr_dev, ROGUE_CR_MIPS_ADDR_REMAP3_CONFIG1, + ROGUE_MIPSFW_CODE_REMAP_PHYS_ADDR_IN | + ROGUE_CR_MIPS_ADDR_REMAP3_CONFIG1_MODE_ENABLE_EN); + pvr_cr_write64(pvr_dev, ROGUE_CR_MIPS_ADDR_REMAP3_CONFIG2, + (mips_data->exception_code_dma_addr & + ~ROGUE_CR_MIPS_ADDR_REMAP3_CONFIG2_ADDR_OUT_CLRMSK) | remap_settings); + + /* Garten IDLE bit controlled by MIPS. */ + pvr_cr_write64(pvr_dev, ROGUE_CR_MTS_GARTEN_WRAPPER_CONFIG, + ROGUE_CR_MTS_GARTEN_WRAPPER_CONFIG_IDLE_CTRL_META); + + /* Turn on the EJTAG probe. */ + pvr_cr_write32(pvr_dev, ROGUE_CR_MIPS_DEBUG_CONFIG, 0); + + return 0; +} + +static u32 +pvr_mips_get_fw_addr_with_offset(struct pvr_fw_object *fw_obj, u32 offset) +{ + struct pvr_device *pvr_dev = to_pvr_device(gem_from_pvr_gem(fw_obj->gem)->dev); + + /* MIPS cacheability is determined by page table. */ + return ((fw_obj->fw_addr_offset + offset) & pvr_dev->fw_dev.fw_heap_info.offset_mask) | + ROGUE_FW_HEAP_MIPS_BASE; +} + +static bool +pvr_mips_has_fixed_data_addr(void) +{ + return true; +} + +const struct pvr_fw_defs pvr_fw_defs_mips = { + .init = pvr_mips_init, + .fini = pvr_mips_fini, + .fw_process = pvr_mips_fw_process, + .vm_map = pvr_vm_mips_map, + .vm_unmap = pvr_vm_mips_unmap, + .get_fw_addr_with_offset = pvr_mips_get_fw_addr_with_offset, + .wrapper_init = pvr_mips_wrapper_init, + .has_fixed_data_addr = pvr_mips_has_fixed_data_addr, + .irq = { + .enable_reg = ROGUE_CR_MIPS_WRAPPER_IRQ_ENABLE, + .status_reg = ROGUE_CR_MIPS_WRAPPER_IRQ_STATUS, + .clear_reg = ROGUE_CR_MIPS_WRAPPER_IRQ_CLEAR, + .event_mask = ROGUE_CR_MIPS_WRAPPER_IRQ_STATUS_EVENT_EN, + .clear_mask = ROGUE_CR_MIPS_WRAPPER_IRQ_CLEAR_EVENT_EN, + }, +}; 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