913ec479bb
The VRAM helpers managed the framebuffer memory for mgag200. This came with several problems, as some MGA device require the scanout address to be located at VRAM offset 0. It's incompatible with the page-flip semantics of DRM's atomic modesettting. With atomic modesetting, old and new framebuffers have to be located in VRAM at the same time. So at least one of them has to reside at a non-0 offset. This patch replaces VRAM helpers with SHMEM helpers. GEM SHMEM buffers reside in system memory, and are shadow-copied into VRAM during page flips. The shadow copy always starts at VRAM offset 0. v2: * revert dev->pdev changes Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Tested-by: John Donnelly <John.p.donnelly@oracle.com> Acked-by: Emil Velikov <emil.velikov@collabora.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200515083233.32036-16-tzimmermann@suse.de
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/*
|
|
* Copyright 2012 Red Hat Inc.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sub license, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
|
|
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
|
|
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
|
|
* USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* The above copyright notice and this permission notice (including the
|
|
* next paragraph) shall be included in all copies or substantial portions
|
|
* of the Software.
|
|
*
|
|
*/
|
|
/*
|
|
* Authors: Dave Airlie <airlied@redhat.com>
|
|
*/
|
|
|
|
#include <linux/pci.h>
|
|
|
|
#include "mgag200_drv.h"
|
|
|
|
int mgag200_mm_init(struct mga_device *mdev)
|
|
{
|
|
struct drm_device *dev = mdev->dev;
|
|
int ret;
|
|
|
|
arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0),
|
|
pci_resource_len(dev->pdev, 0));
|
|
|
|
mdev->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
|
|
pci_resource_len(dev->pdev, 0));
|
|
|
|
mdev->vram = ioremap(pci_resource_start(dev->pdev, 0),
|
|
pci_resource_len(dev->pdev, 0));
|
|
if (!mdev->vram) {
|
|
ret = -ENOMEM;
|
|
goto err_arch_phys_wc_del;
|
|
}
|
|
|
|
mdev->vram_fb_available = mdev->mc.vram_size;
|
|
|
|
return 0;
|
|
|
|
err_arch_phys_wc_del:
|
|
arch_phys_wc_del(mdev->fb_mtrr);
|
|
arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
|
|
pci_resource_len(dev->pdev, 0));
|
|
return ret;
|
|
}
|
|
|
|
void mgag200_mm_fini(struct mga_device *mdev)
|
|
{
|
|
struct drm_device *dev = mdev->dev;
|
|
|
|
mdev->vram_fb_available = 0;
|
|
iounmap(mdev->vram);
|
|
arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
|
|
pci_resource_len(dev->pdev, 0));
|
|
arch_phys_wc_del(mdev->fb_mtrr);
|
|
mdev->fb_mtrr = 0;
|
|
}
|