| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20200211135218.22871-1-kraxel@redhat.com>
Date: Tue, 11 Feb 2020 14:52:18 +0100
From: Gerd Hoffmann <kraxel@...hat.com>
To: dri-devel@...ts.freedesktop.org
Cc: daniel@...ll.ch, Gerd Hoffmann <kraxel@...hat.com>,
David Airlie <airlied@...ux.ie>,
virtualization@...ts.linux-foundation.org (open list:DRM DRIVER FOR
BOCHS VIRTUAL GPU), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v4] drm/bochs: add drm_driver.release callback.
Call bochs_unload via drm_driver.release to make sure we release stuff
when it is safe to do so. Use drm_dev_{enter,exit,unplug} to avoid
touching hardware after device removal. Tidy up here and there.
v4: add changelog.
v3: use drm_dev_*().
v2: move hardware deinit to pci_remove().
Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
---
drivers/gpu/drm/bochs/bochs_drv.c | 6 +++---
drivers/gpu/drm/bochs/bochs_hw.c | 24 +++++++++++++++++++++++-
2 files changed, 26 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/bochs/bochs_drv.c b/drivers/gpu/drm/bochs/bochs_drv.c
index 10460878414e..addb0568c1af 100644
--- a/drivers/gpu/drm/bochs/bochs_drv.c
+++ b/drivers/gpu/drm/bochs/bochs_drv.c
@@ -23,7 +23,6 @@ static void bochs_unload(struct drm_device *dev)
bochs_kms_fini(bochs);
bochs_mm_fini(bochs);
- bochs_hw_fini(dev);
kfree(bochs);
dev->dev_private = NULL;
}
@@ -69,6 +68,7 @@ static struct drm_driver bochs_driver = {
.major = 1,
.minor = 0,
DRM_GEM_VRAM_DRIVER,
+ .release = bochs_unload,
};
/* ---------------------------------------------------------------------- */
@@ -148,9 +148,9 @@ static void bochs_pci_remove(struct pci_dev *pdev)
{
struct drm_device *dev = pci_get_drvdata(pdev);
+ drm_dev_unplug(dev);
drm_atomic_helper_shutdown(dev);
- drm_dev_unregister(dev);
- bochs_unload(dev);
+ bochs_hw_fini(dev);
drm_dev_put(dev);
}
diff --git a/drivers/gpu/drm/bochs/bochs_hw.c b/drivers/gpu/drm/bochs/bochs_hw.c
index b615b7dfdd9d..952199cc0462 100644
--- a/drivers/gpu/drm/bochs/bochs_hw.c
+++ b/drivers/gpu/drm/bochs/bochs_hw.c
@@ -4,6 +4,7 @@
#include <linux/pci.h>
+#include <drm/drm_drv.h>
#include <drm/drm_fourcc.h>
#include "bochs.h"
@@ -194,6 +195,8 @@ void bochs_hw_fini(struct drm_device *dev)
{
struct bochs_device *bochs = dev->dev_private;
+ /* TODO: shot down existing vram mappings */
+
if (bochs->mmio)
iounmap(bochs->mmio);
if (bochs->ioports)
@@ -207,6 +210,11 @@ void bochs_hw_fini(struct drm_device *dev)
void bochs_hw_setmode(struct bochs_device *bochs,
struct drm_display_mode *mode)
{
+ int idx;
+
+ if (!drm_dev_enter(bochs->dev, &idx))
+ return;
+
bochs->xres = mode->hdisplay;
bochs->yres = mode->vdisplay;
bochs->bpp = 32;
@@ -232,11 +240,18 @@ void bochs_hw_setmode(struct bochs_device *bochs,
bochs_dispi_write(bochs, VBE_DISPI_INDEX_ENABLE,
VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED);
+
+ drm_dev_exit(idx);
}
void bochs_hw_setformat(struct bochs_device *bochs,
const struct drm_format_info *format)
{
+ int idx;
+
+ if (!drm_dev_enter(bochs->dev, &idx))
+ return;
+
DRM_DEBUG_DRIVER("format %c%c%c%c\n",
(format->format >> 0) & 0xff,
(format->format >> 8) & 0xff,
@@ -256,13 +271,18 @@ void bochs_hw_setformat(struct bochs_device *bochs,
__func__, format->format);
break;
}
+
+ drm_dev_exit(idx);
}
void bochs_hw_setbase(struct bochs_device *bochs,
int x, int y, int stride, u64 addr)
{
unsigned long offset;
- unsigned int vx, vy, vwidth;
+ unsigned int vx, vy, vwidth, idx;
+
+ if (!drm_dev_enter(bochs->dev, &idx))
+ return;
bochs->stride = stride;
offset = (unsigned long)addr +
@@ -277,4 +297,6 @@ void bochs_hw_setbase(struct bochs_device *bochs,
bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_WIDTH, vwidth);
bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET, vx);
bochs_dispi_write(bochs, VBE_DISPI_INDEX_Y_OFFSET, vy);
+
+ drm_dev_exit(idx);
}
--
2.18.2
Powered by blists - more mailing lists