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Diffstat (limited to '')
| -rw-r--r-- | drivers/gpu/drm/gma500/mmu.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/drivers/gpu/drm/gma500/mmu.h b/drivers/gpu/drm/gma500/mmu.h new file mode 100644 index 000000000..d4b5720ef --- /dev/null +++ b/drivers/gpu/drm/gma500/mmu.h @@ -0,0 +1,86 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/************************************************************************** + * Copyright (c) 2007-2011, Intel Corporation. + * All Rights Reserved. + * + **************************************************************************/ + +#ifndef __MMU_H +#define __MMU_H + +struct psb_mmu_driver { + /* protects driver- and pd structures. Always take in read mode + * before taking the page table spinlock. + */ + struct rw_semaphore sem; + + /* protects page tables, directory tables and pt tables. + * and pt structures. + */ + spinlock_t lock; + + atomic_t needs_tlbflush; + atomic_t *msvdx_mmu_invaldc; + struct psb_mmu_pd *default_pd; + uint32_t bif_ctrl; + int has_clflush; + int clflush_add; + unsigned long clflush_mask; + + struct drm_device *dev; +}; + +struct psb_mmu_pd; + +struct psb_mmu_pt { + struct psb_mmu_pd *pd; + uint32_t index; + uint32_t count; + struct page *p; + uint32_t *v; +}; + +struct psb_mmu_pd { + struct psb_mmu_driver *driver; + int hw_context; + struct psb_mmu_pt **tables; + struct page *p; + struct page *dummy_pt; + struct page *dummy_page; + uint32_t pd_mask; + uint32_t invalid_pde; + uint32_t invalid_pte; +}; + +extern struct psb_mmu_driver *psb_mmu_driver_init(struct drm_device *dev, + int trap_pagefaults, + int invalid_type, + atomic_t *msvdx_mmu_invaldc); +extern void psb_mmu_driver_takedown(struct psb_mmu_driver *driver); +extern struct psb_mmu_pd *psb_mmu_get_default_pd(struct psb_mmu_driver + *driver); +extern struct psb_mmu_pd *psb_mmu_alloc_pd(struct psb_mmu_driver *driver, + int trap_pagefaults, + int invalid_type); +extern void psb_mmu_free_pagedir(struct psb_mmu_pd *pd); +extern void psb_mmu_flush(struct psb_mmu_driver *driver); +extern void psb_mmu_remove_pfn_sequence(struct psb_mmu_pd *pd, + unsigned long address, + uint32_t num_pages); +extern int psb_mmu_insert_pfn_sequence(struct psb_mmu_pd *pd, + uint32_t start_pfn, + unsigned long address, + uint32_t num_pages, int type); +extern int psb_mmu_virtual_to_pfn(struct psb_mmu_pd *pd, uint32_t virtual, + unsigned long *pfn); +extern void psb_mmu_set_pd_context(struct psb_mmu_pd *pd, int hw_context); +extern int psb_mmu_insert_pages(struct psb_mmu_pd *pd, struct page **pages, + unsigned long address, uint32_t num_pages, + uint32_t desired_tile_stride, + uint32_t hw_tile_stride, int type); +extern void psb_mmu_remove_pages(struct psb_mmu_pd *pd, + unsigned long address, uint32_t num_pages, + uint32_t desired_tile_stride, + uint32_t hw_tile_stride); + +#endif |