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8f0d3618c6
i915 wants to read out the PTE(s) populated by the BIOS/GOP to verify that the framebuffer is in the correct location. Introduce intel_gmch_gtt_read_entry() that reads out the PTE and decodes it to a somewhat abstract form. For now we just return the dma_addr, present bit, and local memory bit. I didn't bother with the snoop bit/etc. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20250313140838.29742-4-ville.syrjala@linux.intel.com Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Common header for intel-gtt.ko and i915.ko */
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#ifndef _DRM_INTEL_GTT_H
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#define _DRM_INTEL_GTT_H
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#include <linux/types.h>
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struct agp_bridge_data;
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struct pci_dev;
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struct sg_table;
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void intel_gmch_gtt_get(u64 *gtt_total,
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phys_addr_t *mappable_base,
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resource_size_t *mappable_end);
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int intel_gmch_probe(struct pci_dev *bridge_pdev, struct pci_dev *gpu_pdev,
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struct agp_bridge_data *bridge);
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void intel_gmch_remove(void);
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bool intel_gmch_enable_gtt(void);
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void intel_gmch_gtt_flush(void);
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void intel_gmch_gtt_insert_page(dma_addr_t addr,
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unsigned int pg,
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unsigned int flags);
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void intel_gmch_gtt_insert_sg_entries(struct sg_table *st,
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unsigned int pg_start,
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unsigned int flags);
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void intel_gmch_gtt_clear_range(unsigned int first_entry, unsigned int num_entries);
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dma_addr_t intel_gmch_gtt_read_entry(unsigned int pg,
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bool *is_present, bool *is_local);
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/* Special gtt memory types */
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#define AGP_DCACHE_MEMORY 1
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#define AGP_PHYS_MEMORY 2
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/* flag for GFDT type */
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#define AGP_USER_CACHED_MEMORY_GFDT (1 << 3)
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#endif
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