mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-03-22 07:27:12 +08:00
aaa0c1f50a
Requirement for PSMI capture is to have a physically contiguous buffer. All the needed configuration is done by the userspace tool directly to the GPU via mmio access. This interface only support allocating from VRAM regions. For integrated devices, the PSMI buffer is in SYSTEM memory and should be allocated by userspace using hugetlbfs. Here we add the ability to allocate a region of physically contiguous memory by writing to debugfs file (listed below). For multi-tile devices, the capture tool requires ability to allocate a capture buffer per tile (VRAM region) and so user can specify a region_mask. The tool then can mmap the buffers via direct mmap of the PCIBAR via sysfs. To support the capture tool, 3 new debugfs entries are added: psmi_capture_addr - physical address per VRAM region's capture buffer psmi_capture_region_mask - select which region(s) to allocate a buffer psmi_capture_size - size of current capture buffer Writing psmi_capture_size will allocate new buffer of requested size per region after freeing any current buffers. Cc: Matt Roper <matthew.d.roper@intel.com> Cc: Vinay Belgaumkar <vinay.belgaumkar@intel.com> Original-author: Brian Welty <brian.welty@intel.com> Reviewed-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com> # v2 Link: https://lore.kernel.org/r/20250821-psmi-v5-2-34ab7550d3d8@intel.com Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
15 lines
243 B
C
15 lines
243 B
C
/* SPDX-License-Identifier: MIT */
|
|
/*
|
|
* Copyright © 2025 Intel Corporation
|
|
*/
|
|
|
|
#ifndef _XE_PSMI_H_
|
|
#define _XE_PSMI_H_
|
|
|
|
struct xe_device;
|
|
|
|
int xe_psmi_init(struct xe_device *xe);
|
|
void xe_psmi_debugfs_register(struct xe_device *xe);
|
|
|
|
#endif
|