Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / gpu / drm / gma500 / mmu.h

diff --git a/kernel/drivers/gpu/drm/gma500/mmu.h b/kernel/drivers/gpu/drm/gma500/mmu.h
new file mode 100644 (file)
index 0000000..e89abec
--- /dev/null
+++ b/kernel/drivers/gpu/drm/gma500/mmu.h
@@ -0,0 +1,93 @@
+/**************************************************************************
+ * Copyright (c) 2007-2011, Intel Corporation.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ **************************************************************************/
+
+#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