From 81da8c3b8d3df6f05b11300b7d17ccd1f3017fab Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Tue, 11 Feb 2020 14:52:18 +0100 Subject: [PATCH] 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 Reviewed-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/20200211135218.22871-1-kraxel@redhat.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 +#include #include #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); } -- 2.11.0