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The MIPS firmware processor uses a separate MMU to the rest of the GPU, so this patch adds support for that as well. Changes since v6: - Fix integer overflow in VM map error path Changes since v5: - Use alloc_page() when allocating MIPS pagetable Changes since v3: - Get regs resource (removed from GPU resources commit) Signed-off-by: Sarah Walker --- drivers/gpu/drm/imagination/Makefile | 4 +- drivers/gpu/drm/imagination/pvr_device.c | 5 +- drivers/gpu/drm/imagination/pvr_device.h | 3 + drivers/gpu/drm/imagination/pvr_fw.c | 2 + drivers/gpu/drm/imagination/pvr_fw_mips.c | 252 ++++++++++++++++++++++ drivers/gpu/drm/imagination/pvr_fw_mips.h | 48 +++++ drivers/gpu/drm/imagination/pvr_vm_mips.c | 236 ++++++++++++++++++++ drivers/gpu/drm/imagination/pvr_vm_mips.h | 22 ++ 8 files changed, 570 insertions(+), 2 deletions(-) create mode 100644 drivers/gpu/drm/imagination/pvr_fw_mips.c create mode 100644 drivers/gpu/drm/imagination/pvr_fw_mips.h create mode 100644 drivers/gpu/drm/imagination/pvr_vm_mips.c create mode 100644 drivers/gpu/drm/imagination/pvr_vm_mips.h diff --git a/drivers/gpu/drm/imagination/Makefile b/drivers/gpu/drm/imagination/Makefile index 5b02440841be..0a6532d30c00 100644 --- a/drivers/gpu/drm/imagination/Makefile +++ b/drivers/gpu/drm/imagination/Makefile @@ -10,11 +10,13 @@ powervr-y := \ pvr_drv.o \ pvr_fw.o \ pvr_fw_meta.o \ + pvr_fw_mips.o \ pvr_fw_startstop.o \ pvr_fw_trace.o \ pvr_gem.o \ pvr_mmu.o \ pvr_power.o \ - pvr_vm.o + pvr_vm.o \ + pvr_vm_mips.o obj-$(CONFIG_DRM_POWERVR) += powervr.o diff --git a/drivers/gpu/drm/imagination/pvr_device.c b/drivers/gpu/drm/imagination/pvr_device.c index 6055cf6054f7..aac5e62d6cbe 100644 --- a/drivers/gpu/drm/imagination/pvr_device.c +++ b/drivers/gpu/drm/imagination/pvr_device.c @@ -50,16 +50,19 @@ pvr_device_reg_init(struct pvr_device *pvr_dev) { struct drm_device *drm_dev = from_pvr_device(pvr_dev); struct platform_device *plat_dev = to_platform_device(drm_dev->dev); + struct resource *regs_resource; void __iomem *regs; + pvr_dev->regs_resource = NULL; pvr_dev->regs = NULL; - regs = devm_platform_ioremap_resource(plat_dev, 0); + regs = devm_platform_get_and_ioremap_resource(plat_dev, 0, ®s_resource); if (IS_ERR(regs)) return dev_err_probe(drm_dev->dev, PTR_ERR(regs), "failed to ioremap gpu registers\n"); pvr_dev->regs = regs; + pvr_dev->regs_resource = regs_resource; return 0; } diff --git a/drivers/gpu/drm/imagination/pvr_device.h b/drivers/gpu/drm/imagination/pvr_device.h index b5de9574a116..cbcfc5d4b845 100644 --- a/drivers/gpu/drm/imagination/pvr_device.h +++ b/drivers/gpu/drm/imagination/pvr_device.h @@ -93,6 +93,9 @@ struct pvr_device { /** @fw_version: Firmware version detected at runtime. */ struct pvr_fw_version fw_version; + /** @regs_resource: Resource representing device control registers. */ + struct resource *regs_resource; + /** * @regs: Device control registers. * diff --git a/drivers/gpu/drm/imagination/pvr_fw.c b/drivers/gpu/drm/imagination/pvr_fw.c index 4ea663be4596..d3edcb74f29d 100644 --- a/drivers/gpu/drm/imagination/pvr_fw.c +++ b/drivers/gpu/drm/imagination/pvr_fw.c @@ -933,6 +933,8 @@ pvr_fw_init(struct pvr_device *pvr_dev) if (fw_dev->processor_type == PVR_FW_PROCESSOR_TYPE_META) fw_dev->defs = &pvr_fw_defs_meta; + else if (fw_dev->processor_type == PVR_FW_PROCESSOR_TYPE_MIPS) + fw_dev->defs = &pvr_fw_defs_mips; else return -EINVAL; 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..bf13b05d1248 --- /dev/null +++ b/drivers/gpu/drm/imagination/pvr_fw_mips.c @@ -0,0 +1,252 @@ +// SPDX-License-Identifier: GPL-2.0 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 +#include +#include + +#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, + }, +}; diff --git a/drivers/gpu/drm/imagination/pvr_fw_mips.h b/drivers/gpu/drm/imagination/pvr_fw_mips.h new file mode 100644 index 000000000000..676b2d279796 --- /dev/null +++ b/drivers/gpu/drm/imagination/pvr_fw_mips.h @@ -0,0 +1,48 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ +/* Copyright (c) 2023 Imagination Technologies Ltd. */ + +#ifndef PVR_FW_MIPS_H +#define PVR_FW_MIPS_H + +#include "pvr_rogue_mips.h" + +#include +#include + +/* Forward declaration from pvr_gem.h. */ +struct pvr_gem_object; + +#define PVR_MIPS_PT_PAGE_COUNT ((ROGUE_MIPSFW_MAX_NUM_PAGETABLE_PAGES * ROGUE_MIPSFW_PAGE_SIZE_4K) \ + >> PAGE_SHIFT) +/** + * struct pvr_fw_mips_data - MIPS-specific data + */ +struct pvr_fw_mips_data { + /** + * @pt_pages: Pages containing MIPS pagetable. + */ + struct page *pt_pages[PVR_MIPS_PT_PAGE_COUNT]; + + /** @pt: Pointer to CPU mapping of MIPS pagetable. */ + u32 *pt; + + /** @pt_dma_addr: DMA mappings of MIPS pagetable. */ + dma_addr_t pt_dma_addr[PVR_MIPS_PT_PAGE_COUNT]; + + /** @boot_code_dma_addr: DMA address of MIPS boot code. */ + dma_addr_t boot_code_dma_addr; + + /** @boot_data_dma_addr: DMA address of MIPS boot data. */ + dma_addr_t boot_data_dma_addr; + + /** @exception_code_dma_addr: DMA address of MIPS exception code. */ + dma_addr_t exception_code_dma_addr; + + /** @cache_policy: Cache policy for this processor. */ + u32 cache_policy; + + /** @pfn_mask: PFN mask for MIPS pagetable. */ + u32 pfn_mask; +}; + +#endif /* PVR_FW_MIPS_H */ diff --git a/drivers/gpu/drm/imagination/pvr_vm_mips.c b/drivers/gpu/drm/imagination/pvr_vm_mips.c new file mode 100644 index 000000000000..8f7730e0e4fa --- /dev/null +++ b/drivers/gpu/drm/imagination/pvr_vm_mips.c @@ -0,0 +1,236 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT +/* Copyright (c) 2023 Imagination Technologies Ltd. */ + +#include "pvr_device.h" +#include "pvr_fw_mips.h" +#include "pvr_gem.h" +#include "pvr_mmu.h" +#include "pvr_rogue_mips.h" +#include "pvr_vm.h" +#include "pvr_vm_mips.h" + +#include +#include +#include +#include +#include + +/** + * pvr_vm_mips_init() - Initialise MIPS FW pagetable + * @pvr_dev: Target PowerVR device. + * + * Returns: + * * 0 on success, + * * -%EINVAL, + * * Any error returned by pvr_gem_object_create(), or + * * And error returned by pvr_gem_object_vmap(). + */ +int +pvr_vm_mips_init(struct pvr_device *pvr_dev) +{ + u32 pt_size = 1 << ROGUE_MIPSFW_LOG2_PAGETABLE_SIZE_4K(pvr_dev); + struct device *dev = from_pvr_device(pvr_dev)->dev; + struct pvr_fw_mips_data *mips_data; + u32 phys_bus_width; + int page_nr; + int err; + + /* Page table size must be at most ROGUE_MIPSFW_MAX_NUM_PAGETABLE_PAGES * 4k pages. */ + if (pt_size > ROGUE_MIPSFW_MAX_NUM_PAGETABLE_PAGES * SZ_4K) + return -EINVAL; + + if (PVR_FEATURE_VALUE(pvr_dev, phys_bus_width, &phys_bus_width)) + return -EINVAL; + + mips_data = drmm_kzalloc(from_pvr_device(pvr_dev), sizeof(*mips_data), GFP_KERNEL); + if (!mips_data) + return -ENOMEM; + + for (page_nr = 0; page_nr < ARRAY_SIZE(mips_data->pt_pages); page_nr++) { + mips_data->pt_pages[page_nr] = alloc_page(GFP_KERNEL | __GFP_ZERO); + if (!mips_data->pt_pages[page_nr]) { + err = -ENOMEM; + goto err_free_pages; + } + + mips_data->pt_dma_addr[page_nr] = dma_map_page(dev, mips_data->pt_pages[page_nr], 0, + PAGE_SIZE, DMA_TO_DEVICE); + if (dma_mapping_error(dev, mips_data->pt_dma_addr[page_nr])) { + err = -ENOMEM; + goto err_free_pages; + } + } + + mips_data->pt = vmap(mips_data->pt_pages, pt_size >> PAGE_SHIFT, VM_MAP, + pgprot_writecombine(PAGE_KERNEL)); + if (!mips_data->pt) { + err = -ENOMEM; + goto err_free_pages; + } + + mips_data->pfn_mask = (phys_bus_width > 32) ? ROGUE_MIPSFW_ENTRYLO_PFN_MASK_ABOVE_32BIT : + ROGUE_MIPSFW_ENTRYLO_PFN_MASK; + + mips_data->cache_policy = (phys_bus_width > 32) ? ROGUE_MIPSFW_CACHED_POLICY_ABOVE_32BIT : + ROGUE_MIPSFW_CACHED_POLICY; + + pvr_dev->fw_dev.processor_data.mips_data = mips_data; + + return 0; + +err_free_pages: + for (; page_nr >= 0; page_nr--) { + if (mips_data->pt_dma_addr[page_nr]) + dma_unmap_page(from_pvr_device(pvr_dev)->dev, + mips_data->pt_dma_addr[page_nr], PAGE_SIZE, DMA_TO_DEVICE); + + if (mips_data->pt_pages[page_nr]) + __free_page(mips_data->pt_pages[page_nr]); + } + + return err; +} + +/** + * pvr_vm_mips_fini() - Release MIPS FW pagetable + * @pvr_dev: Target PowerVR device. + */ +void +pvr_vm_mips_fini(struct pvr_device *pvr_dev) +{ + struct pvr_fw_device *fw_dev = &pvr_dev->fw_dev; + struct pvr_fw_mips_data *mips_data = fw_dev->processor_data.mips_data; + int page_nr; + + vunmap(mips_data->pt); + for (page_nr = ARRAY_SIZE(mips_data->pt_pages) - 1; page_nr >= 0; page_nr--) { + dma_unmap_page(from_pvr_device(pvr_dev)->dev, + mips_data->pt_dma_addr[page_nr], PAGE_SIZE, DMA_TO_DEVICE); + + __free_page(mips_data->pt_pages[page_nr]); + } + + fw_dev->processor_data.mips_data = NULL; +} + +static u32 +get_mips_pte_flags(bool read, bool write, u32 cache_policy) +{ + u32 flags = 0; + + if (read && write) /* Read/write. */ + flags |= ROGUE_MIPSFW_ENTRYLO_DIRTY_EN; + else if (write) /* Write only. */ + flags |= ROGUE_MIPSFW_ENTRYLO_READ_INHIBIT_EN; + else + WARN_ON(!read); + + flags |= cache_policy << ROGUE_MIPSFW_ENTRYLO_CACHE_POLICY_SHIFT; + + flags |= ROGUE_MIPSFW_ENTRYLO_VALID_EN | ROGUE_MIPSFW_ENTRYLO_GLOBAL_EN; + + return flags; +} + +/** + * pvr_vm_mips_map() - Map a FW object into MIPS address space + * @pvr_dev: Target PowerVR device. + * @fw_obj: FW object to map. + * + * Returns: + * * 0 on success, + * * -%EINVAL if object does not reside within FW address space, or + * * Any error returned by pvr_fw_object_get_dma_addr(). + */ +int +pvr_vm_mips_map(struct pvr_device *pvr_dev, struct pvr_fw_object *fw_obj) +{ + struct pvr_fw_device *fw_dev = &pvr_dev->fw_dev; + struct pvr_fw_mips_data *mips_data = fw_dev->processor_data.mips_data; + struct pvr_gem_object *pvr_obj = fw_obj->gem; + u64 start = fw_obj->fw_mm_node.start; + u64 size = fw_obj->fw_mm_node.size; + u64 end; + u32 cache_policy; + u32 pte_flags; + u32 start_pfn; + u32 end_pfn; + s32 pfn; + int err; + + if (check_add_overflow(start, size - 1, &end)) + return -EINVAL; + + if (start < ROGUE_FW_HEAP_BASE || + start >= ROGUE_FW_HEAP_BASE + fw_dev->fw_heap_info.raw_size || + end < ROGUE_FW_HEAP_BASE || + end >= ROGUE_FW_HEAP_BASE + fw_dev->fw_heap_info.raw_size || + (start & ROGUE_MIPSFW_PAGE_MASK_4K) || + ((end + 1) & ROGUE_MIPSFW_PAGE_MASK_4K)) + return -EINVAL; + + start_pfn = (start & fw_dev->fw_heap_info.offset_mask) >> ROGUE_MIPSFW_LOG2_PAGE_SIZE_4K; + end_pfn = (end & fw_dev->fw_heap_info.offset_mask) >> ROGUE_MIPSFW_LOG2_PAGE_SIZE_4K; + + if (pvr_obj->flags & PVR_BO_FW_FLAGS_DEVICE_UNCACHED) + cache_policy = ROGUE_MIPSFW_UNCACHED_CACHE_POLICY; + else + cache_policy = mips_data->cache_policy; + + pte_flags = get_mips_pte_flags(true, true, cache_policy); + + for (pfn = start_pfn; pfn <= end_pfn; pfn++) { + dma_addr_t dma_addr; + u32 pte; + + err = pvr_fw_object_get_dma_addr(fw_obj, + (pfn - start_pfn) << + ROGUE_MIPSFW_LOG2_PAGE_SIZE_4K, + &dma_addr); + if (err) + goto err_unmap_pages; + + pte = ((dma_addr >> ROGUE_MIPSFW_LOG2_PAGE_SIZE_4K) + << ROGUE_MIPSFW_ENTRYLO_PFN_SHIFT) & mips_data->pfn_mask; + pte |= pte_flags; + + WRITE_ONCE(mips_data->pt[pfn], pte); + } + + pvr_mmu_flush(pvr_dev); + + return 0; + +err_unmap_pages: + for (; pfn >= start_pfn; pfn--) + WRITE_ONCE(mips_data->pt[pfn], 0); + + pvr_mmu_flush(pvr_dev); + + return err; +} + +/** + * pvr_vm_mips_unmap() - Unmap a FW object into MIPS address space + * @pvr_dev: Target PowerVR device. + * @fw_obj: FW object to unmap. + */ +void +pvr_vm_mips_unmap(struct pvr_device *pvr_dev, struct pvr_fw_object *fw_obj) +{ + struct pvr_fw_device *fw_dev = &pvr_dev->fw_dev; + struct pvr_fw_mips_data *mips_data = fw_dev->processor_data.mips_data; + u64 start = fw_obj->fw_mm_node.start; + u64 size = fw_obj->fw_mm_node.size; + u64 end = start + size; + + u32 start_pfn = (start & fw_dev->fw_heap_info.offset_mask) >> + ROGUE_MIPSFW_LOG2_PAGE_SIZE_4K; + u32 end_pfn = (end & fw_dev->fw_heap_info.offset_mask) >> ROGUE_MIPSFW_LOG2_PAGE_SIZE_4K; + u32 pfn; + + for (pfn = start_pfn; pfn < end_pfn; pfn++) + WRITE_ONCE(mips_data->pt[pfn], 0); + + pvr_mmu_flush(pvr_dev); +} diff --git a/drivers/gpu/drm/imagination/pvr_vm_mips.h b/drivers/gpu/drm/imagination/pvr_vm_mips.h new file mode 100644 index 000000000000..71d238d5327a --- /dev/null +++ b/drivers/gpu/drm/imagination/pvr_vm_mips.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ +/* Copyright (c) 2023 Imagination Technologies Ltd. */ + +#ifndef PVR_VM_MIPS_H +#define PVR_VM_MIPS_H + +/* Forward declaration from pvr_device.h. */ +struct pvr_device; + +/* Forward declaration from pvr_gem.h. */ +struct pvr_fw_object; + +int +pvr_vm_mips_init(struct pvr_device *pvr_dev); +void +pvr_vm_mips_fini(struct pvr_device *pvr_dev); +int +pvr_vm_mips_map(struct pvr_device *pvr_dev, struct pvr_fw_object *fw_obj); +void +pvr_vm_mips_unmap(struct pvr_device *pvr_dev, struct pvr_fw_object *fw_obj); + +#endif /* PVR_VM_MIPS_H */