From f4cdf7ca9a1fdcca413157df19753f388a5a224e Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 19 Aug 2026 10:09:22 -0700 Subject: Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media updates from Mauro Carvalho Chehab: - v4l2-core: added ISP statistics support and per-block validation - v4l2-core: Allow unknown HDR10 white point and luminance - New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor - New codec: Milos: VPU v2.0 codec support - isp driver: gained support for Dreamchip RPPX1 ISP framework - vsp1 driver: gained support for RZ/T2H and RZ/N2H - Novalake driver: gained CVS support for new NVL hardware - dvb-core: fix feed leak on failed DMX_ADD_PID - several driver fixes, cleanups and minor improvements * tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits) media: ipu-bridge: check all DMI entries when overriding sensor rotation media: v4l2-async: avoid deleting unlinked ASC entry on link error media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement media: intel/ipu6: fix async notifier cleanup leak on parse error media: staging/ipu7: fix async notifier UAF on probe error path media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem() media: rcar-isp: Fix VSPX reference leaks media: rcar-isp: Release ISPCORE resources media: i2c: imx415: Release runtime PM reference on VBLANK error media: i2c: imx415: Return test pattern write errors media: renesas: vsp1: Declare index variables in for loop statement media: renesas: vsp1: Make reset control optional to support platforms without a reset line media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs media: nxp: imx8-isi: Add additional 32-bit RGB format support media: nxp: imx8-isi: Add 16-bit raw Bayer format support media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks media: nxp: imx8-isi: Correct color map between V4L2 and ISI ... --- arch/mips/mm/cache.c | 218 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 218 insertions(+) create mode 100644 arch/mips/mm/cache.c (limited to 'arch/mips/mm/cache.c') diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c new file mode 100644 index 000000000..ad9b0430a --- /dev/null +++ b/arch/mips/mm/cache.c @@ -0,0 +1,218 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 1994 - 2003, 06, 07 by Ralf Baechle (ralf@linux-mips.org) + * Copyright (C) 2007 MIPS Technologies, Inc. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +/* Cache operations. */ +void (*flush_cache_all)(void); +void (*__flush_cache_all)(void); +EXPORT_SYMBOL_GPL(__flush_cache_all); +void (*flush_cache_mm)(struct mm_struct *mm); +void (*flush_cache_range)(struct vm_area_struct *vma, unsigned long start, + unsigned long end); +void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page, + unsigned long pfn); +void (*flush_icache_range)(unsigned long start, unsigned long end); +EXPORT_SYMBOL_GPL(flush_icache_range); +void (*local_flush_icache_range)(unsigned long start, unsigned long end); +EXPORT_SYMBOL_GPL(local_flush_icache_range); +void (*__flush_icache_user_range)(unsigned long start, unsigned long end); +void (*__local_flush_icache_user_range)(unsigned long start, unsigned long end); +EXPORT_SYMBOL_GPL(__local_flush_icache_user_range); + +void (*__flush_cache_vmap)(void); +void (*__flush_cache_vunmap)(void); + +void (*__flush_kernel_vmap_range)(unsigned long vaddr, int size); +EXPORT_SYMBOL_GPL(__flush_kernel_vmap_range); + +/* MIPS specific cache operations */ +void (*flush_data_cache_page)(unsigned long addr); +void (*flush_icache_all)(void); + +EXPORT_SYMBOL(flush_data_cache_page); +EXPORT_SYMBOL(flush_icache_all); + +/* + * Dummy cache handling routine + */ + +void cache_noop(void) {} + +#ifdef CONFIG_BOARD_SCACHE + +static struct bcache_ops no_sc_ops = { + .bc_enable = (void *)cache_noop, + .bc_disable = (void *)cache_noop, + .bc_wback_inv = (void *)cache_noop, + .bc_inv = (void *)cache_noop +}; + +struct bcache_ops *bcops = &no_sc_ops; +#endif + +#ifdef CONFIG_DMA_NONCOHERENT + +/* DMA cache operations. */ +void (*_dma_cache_wback_inv)(unsigned long start, unsigned long size); +void (*_dma_cache_wback)(unsigned long start, unsigned long size); +void (*_dma_cache_inv)(unsigned long start, unsigned long size); + +#endif /* CONFIG_DMA_NONCOHERENT */ + +/* + * We could optimize the case where the cache argument is not BCACHE but + * that seems very atypical use ... + */ +SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, bytes, + unsigned int, cache) +{ + if (bytes == 0) + return 0; + if (!access_ok((void __user *) addr, bytes)) + return -EFAULT; + + __flush_icache_user_range(addr, addr + bytes); + + return 0; +} + +void __flush_dcache_folio_pages(struct folio *folio, struct page *page, + unsigned int nr) +{ + struct address_space *mapping = folio_flush_mapping(folio); + unsigned long addr; + unsigned int i; + + if (mapping && !mapping_mapped(mapping)) { + folio_set_dcache_dirty(folio); + return; + } + + /* + * We could delay the flush for the !folio_mapping case too. But that + * case is for exec env/arg pages and those are %99 certainly going to + * get faulted into the tlb (and thus flushed) anyways. + */ + for (i = 0; i < nr; i++) { + addr = (unsigned long)kmap_local_page(page + i); + flush_data_cache_page(addr); + kunmap_local((void *)addr); + } +} +EXPORT_SYMBOL(__flush_dcache_folio_pages); + +void __flush_anon_page(struct page *page, unsigned long vmaddr) +{ + unsigned long addr = (unsigned long) page_address(page); + struct folio *folio = page_folio(page); + + if (pages_do_alias(addr, vmaddr)) { + if (folio_mapped(folio) && !folio_test_dcache_dirty(folio)) { + void *kaddr; + + kaddr = kmap_coherent(page, vmaddr); + flush_data_cache_page((unsigned long)kaddr); + kunmap_coherent(); + } else + flush_data_cache_page(addr); + } +} + +EXPORT_SYMBOL(__flush_anon_page); + +void __update_cache(unsigned long address, pte_t pte) +{ + struct folio *folio; + unsigned long pfn, addr; + int exec = !pte_no_exec(pte) && !cpu_has_ic_fills_f_dc; + unsigned int i; + + pfn = pte_pfn(pte); + if (unlikely(!pfn_valid(pfn))) + return; + + folio = page_folio(pfn_to_page(pfn)); + address &= PAGE_MASK; + address -= offset_in_folio(folio, pfn << PAGE_SHIFT); + + if (folio_test_dcache_dirty(folio)) { + for (i = 0; i < folio_nr_pages(folio); i++) { + addr = (unsigned long)kmap_local_folio(folio, i); + + if (exec || pages_do_alias(addr, address)) + flush_data_cache_page(addr); + kunmap_local((void *)addr); + address += PAGE_SIZE; + } + folio_clear_dcache_dirty(folio); + } +} + +unsigned long _page_cachable_default; +EXPORT_SYMBOL(_page_cachable_default); + +#define PM(p) __pgprot(_page_cachable_default | (p)) + +static pgprot_t protection_map[16] __ro_after_init; +DECLARE_VM_GET_PAGE_PROT + +static inline void setup_protection_map(void) +{ + protection_map[0] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_NO_READ); + protection_map[1] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC); + protection_map[2] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_NO_READ); + protection_map[3] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC); + protection_map[4] = PM(_PAGE_PRESENT); + protection_map[5] = PM(_PAGE_PRESENT); + protection_map[6] = PM(_PAGE_PRESENT); + protection_map[7] = PM(_PAGE_PRESENT); + + protection_map[8] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_NO_READ); + protection_map[9] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC); + protection_map[10] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_WRITE | + _PAGE_NO_READ); + protection_map[11] = PM(_PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_WRITE); + protection_map[12] = PM(_PAGE_PRESENT); + protection_map[13] = PM(_PAGE_PRESENT); + protection_map[14] = PM(_PAGE_PRESENT | _PAGE_WRITE); + protection_map[15] = PM(_PAGE_PRESENT | _PAGE_WRITE); +} + +#undef PM + +void cpu_cache_init(void) +{ + if (IS_ENABLED(CONFIG_CPU_R3000) && cpu_has_3k_cache) + r3k_cache_init(); + if ((IS_ENABLED(CONFIG_CPU_R4K_CACHE_TLB) || + IS_ENABLED(CONFIG_CPU_SB1)) && cpu_has_4k_cache) + r4k_cache_init(); + + if (IS_ENABLED(CONFIG_CPU_CAVIUM_OCTEON) && cpu_has_octeon_cache) + octeon_cache_init(); + + setup_protection_map(); +} -- cgit v1.3.1