[PATCH v3 13/13] drm/tegra: kick out simplefb

2018-09-01 Thread Michał Mirosław
Kick out firmware fb when loading Tegra driver.

Signed-off-by: Michał Mirosław 
Acked-by: Daniel Vetter 
---
 drivers/gpu/drm/tegra/drm.c | 4 
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index 7afe2f635f74..b51ec138fed2 100644
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -1203,6 +1203,10 @@ static int host1x_drm_probe(struct host1x_device *dev)
 
dev_set_drvdata(>dev, drm);
 
+   err = drm_fb_helper_remove_conflicting_framebuffers(NULL, "tegradrmfb", 
false);
+   if (err < 0)
+   goto unref;
+
err = drm_dev_register(drm, 0);
if (err < 0)
goto unref;
-- 
2.18.0

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[PATCH v3 12/13] drm/sun4i: use simpler remove_conflicting_framebuffers(NULL)

2018-09-01 Thread Michał Mirosław
Use remove_conflicting_framebuffers(NULL) instead of duplicating it.

Signed-off-by: Michał Mirosław 
Acked-by: Maxime Ripard 
Acked-by: Daniel Vetter 
---
 drivers/gpu/drm/sun4i/sun4i_drv.c | 18 +-
 1 file changed, 1 insertion(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c 
b/drivers/gpu/drm/sun4i/sun4i_drv.c
index 50d19605c38f..555b5db8036f 100644
--- a/drivers/gpu/drm/sun4i/sun4i_drv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
@@ -60,22 +60,6 @@ static struct drm_driver sun4i_drv_driver = {
/* Frame Buffer Operations */
 };
 
-static void sun4i_remove_framebuffers(void)
-{
-   struct apertures_struct *ap;
-
-   ap = alloc_apertures(1);
-   if (!ap)
-   return;
-
-   /* The framebuffer can be located anywhere in RAM */
-   ap->ranges[0].base = 0;
-   ap->ranges[0].size = ~0;
-
-   drm_fb_helper_remove_conflicting_framebuffers(ap, "sun4i-drm-fb", 
false);
-   kfree(ap);
-}
-
 static int sun4i_drv_bind(struct device *dev)
 {
struct drm_device *drm;
@@ -118,7 +102,7 @@ static int sun4i_drv_bind(struct device *dev)
drm->irq_enabled = true;
 
/* Remove early framebuffers (ie. simplefb) */
-   sun4i_remove_framebuffers();
+   drm_fb_helper_remove_conflicting_framebuffers(NULL, "sun4i-drm-fb", 
false);
 
/* Create our framebuffer */
ret = sun4i_framebuffer_init(drm);
-- 
2.18.0

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[PATCH v3 10/13] drm/virtio: use simpler remove_conflicting_pci_framebuffers()

2018-09-01 Thread Michał Mirosław
Signed-off-by: Michał Mirosław 
Acked-by: Daniel Vetter 
---
 drivers/gpu/drm/virtio/virtgpu_drm_bus.c | 24 +++-
 1 file changed, 3 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_drm_bus.c 
b/drivers/gpu/drm/virtio/virtgpu_drm_bus.c
index 7df8d0c9026a..115ed546ca4e 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drm_bus.c
+++ b/drivers/gpu/drm/virtio/virtgpu_drm_bus.c
@@ -28,26 +28,6 @@
 
 #include "virtgpu_drv.h"
 
-static void virtio_pci_kick_out_firmware_fb(struct pci_dev *pci_dev)
-{
-   struct apertures_struct *ap;
-   bool primary;
-
-   ap = alloc_apertures(1);
-   if (!ap)
-   return;
-
-   ap->ranges[0].base = pci_resource_start(pci_dev, 0);
-   ap->ranges[0].size = pci_resource_len(pci_dev, 0);
-
-   primary = pci_dev->resource[PCI_ROM_RESOURCE].flags
-   & IORESOURCE_ROM_SHADOW;
-
-   drm_fb_helper_remove_conflicting_framebuffers(ap, "virtiodrmfb", 
primary);
-
-   kfree(ap);
-}
-
 int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev)
 {
struct drm_device *dev;
@@ -69,7 +49,9 @@ int drm_virtio_init(struct drm_driver *driver, struct 
virtio_device *vdev)
 pname);
dev->pdev = pdev;
if (vga)
-   virtio_pci_kick_out_firmware_fb(pdev);
+   drm_fb_helper_remove_conflicting_pci_framebuffers(pdev,
+ 0,
+ 
"virtiodrmfb");
 
snprintf(unique, sizeof(unique), "pci:%s", pname);
ret = drm_dev_set_unique(dev, unique);
-- 
2.18.0

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[PATCH v3 08/13] drm/mgag200: use simpler remove_conflicting_pci_framebuffers()

2018-09-01 Thread Michał Mirosław
Remove duplicated call, while at it.

Signed-off-by: Michał Mirosław 
Acked-by: Daniel Vetter 
---
 drivers/gpu/drm/mgag200/mgag200_drv.c  | 21 +
 drivers/gpu/drm/mgag200/mgag200_main.c |  9 -
 2 files changed, 1 insertion(+), 29 deletions(-)

diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c 
b/drivers/gpu/drm/mgag200/mgag200_drv.c
index 74cdde2ee474..ac6af4bd9df6 100644
--- a/drivers/gpu/drm/mgag200/mgag200_drv.c
+++ b/drivers/gpu/drm/mgag200/mgag200_drv.c
@@ -42,29 +42,10 @@ static const struct pci_device_id pciidlist[] = {
 
 MODULE_DEVICE_TABLE(pci, pciidlist);
 
-static void mgag200_kick_out_firmware_fb(struct pci_dev *pdev)
-{
-   struct apertures_struct *ap;
-   bool primary = false;
-
-   ap = alloc_apertures(1);
-   if (!ap)
-   return;
-
-   ap->ranges[0].base = pci_resource_start(pdev, 0);
-   ap->ranges[0].size = pci_resource_len(pdev, 0);
-
-#ifdef CONFIG_X86
-   primary = pdev->resource[PCI_ROM_RESOURCE].flags & 
IORESOURCE_ROM_SHADOW;
-#endif
-   drm_fb_helper_remove_conflicting_framebuffers(ap, "mgag200drmfb", 
primary);
-   kfree(ap);
-}
-
 
 static int mga_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
-   mgag200_kick_out_firmware_fb(pdev);
+   drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, 
"mgag200drmfb");
 
return drm_get_pci_dev(pdev, ent, );
 }
diff --git a/drivers/gpu/drm/mgag200/mgag200_main.c 
b/drivers/gpu/drm/mgag200/mgag200_main.c
index 780f983b0294..79d54103d470 100644
--- a/drivers/gpu/drm/mgag200/mgag200_main.c
+++ b/drivers/gpu/drm/mgag200/mgag200_main.c
@@ -124,20 +124,11 @@ static int mga_probe_vram(struct mga_device *mdev, void 
__iomem *mem)
 static int mga_vram_init(struct mga_device *mdev)
 {
void __iomem *mem;
-   struct apertures_struct *aper = alloc_apertures(1);
-   if (!aper)
-   return -ENOMEM;
 
/* BAR 0 is VRAM */
mdev->mc.vram_base = pci_resource_start(mdev->dev->pdev, 0);
mdev->mc.vram_window = pci_resource_len(mdev->dev->pdev, 0);
 
-   aper->ranges[0].base = mdev->mc.vram_base;
-   aper->ranges[0].size = mdev->mc.vram_window;
-
-   drm_fb_helper_remove_conflicting_framebuffers(aper, "mgafb", true);
-   kfree(aper);
-
if (!devm_request_mem_region(mdev->dev->dev, mdev->mc.vram_base, 
mdev->mc.vram_window,
"mgadrmfb_vram")) {
DRM_ERROR("can't reserve VRAM\n");
-- 
2.18.0

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[PATCH v3 09/13] drm/radeon: use simpler remove_conflicting_pci_framebuffers()

2018-09-01 Thread Michał Mirosław
Signed-off-by: Michał Mirosław 
Acked-by: Alex Deucher 
Acked-by: Daniel Vetter 
---
 drivers/gpu/drm/radeon/radeon_drv.c | 23 +--
 1 file changed, 1 insertion(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_drv.c 
b/drivers/gpu/drm/radeon/radeon_drv.c
index b28288a781ef..36c98a0ec991 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -311,27 +311,6 @@ static struct drm_driver kms_driver;
 
 bool radeon_device_is_virtual(void);
 
-static int radeon_kick_out_firmware_fb(struct pci_dev *pdev)
-{
-   struct apertures_struct *ap;
-   bool primary = false;
-
-   ap = alloc_apertures(1);
-   if (!ap)
-   return -ENOMEM;
-
-   ap->ranges[0].base = pci_resource_start(pdev, 0);
-   ap->ranges[0].size = pci_resource_len(pdev, 0);
-
-#ifdef CONFIG_X86
-   primary = pdev->resource[PCI_ROM_RESOURCE].flags & 
IORESOURCE_ROM_SHADOW;
-#endif
-   drm_fb_helper_remove_conflicting_framebuffers(ap, "radeondrmfb", 
primary);
-   kfree(ap);
-
-   return 0;
-}
-
 static int radeon_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
 {
@@ -341,7 +320,7 @@ static int radeon_pci_probe(struct pci_dev *pdev,
return -EPROBE_DEFER;
 
/* Get rid of things like offb */
-   ret = radeon_kick_out_firmware_fb(pdev);
+   ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, 
"radeondrmfb");
if (ret)
return ret;
 
-- 
2.18.0

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[PATCH v3 07/13] drm/cirrus: use simpler remove_conflicting_pci_framebuffers()

2018-09-01 Thread Michał Mirosław
Signed-off-by: Michał Mirosław 
Acked-by: Daniel Vetter 
---
 drivers/gpu/drm/cirrus/cirrus_drv.c | 23 +--
 1 file changed, 1 insertion(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/cirrus/cirrus_drv.c 
b/drivers/gpu/drm/cirrus/cirrus_drv.c
index 69c4e352dd78..85ed8657c862 100644
--- a/drivers/gpu/drm/cirrus/cirrus_drv.c
+++ b/drivers/gpu/drm/cirrus/cirrus_drv.c
@@ -42,33 +42,12 @@ static const struct pci_device_id pciidlist[] = {
 };
 
 
-static int cirrus_kick_out_firmware_fb(struct pci_dev *pdev)
-{
-   struct apertures_struct *ap;
-   bool primary = false;
-
-   ap = alloc_apertures(1);
-   if (!ap)
-   return -ENOMEM;
-
-   ap->ranges[0].base = pci_resource_start(pdev, 0);
-   ap->ranges[0].size = pci_resource_len(pdev, 0);
-
-#ifdef CONFIG_X86
-   primary = pdev->resource[PCI_ROM_RESOURCE].flags & 
IORESOURCE_ROM_SHADOW;
-#endif
-   drm_fb_helper_remove_conflicting_framebuffers(ap, "cirrusdrmfb", 
primary);
-   kfree(ap);
-
-   return 0;
-}
-
 static int cirrus_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
 {
int ret;
 
-   ret = cirrus_kick_out_firmware_fb(pdev);
+   ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, 
"cirrusdrmfb");
if (ret)
return ret;
 
-- 
2.18.0

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[PATCH v3 05/13] drm/amdgpu: use simpler remove_conflicting_pci_framebuffers()

2018-09-01 Thread Michał Mirosław
Signed-off-by: Michał Mirosław 
Acked-by: Alex Deucher 
Acked-by: Daniel Vetter 
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 24 +---
 1 file changed, 1 insertion(+), 23 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 0b19482b36b8..9b6e037719db 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -560,28 +560,6 @@ MODULE_DEVICE_TABLE(pci, pciidlist);
 
 static struct drm_driver kms_driver;
 
-static int amdgpu_kick_out_firmware_fb(struct pci_dev *pdev)
-{
-   struct apertures_struct *ap;
-   bool primary = false;
-
-   ap = alloc_apertures(1);
-   if (!ap)
-   return -ENOMEM;
-
-   ap->ranges[0].base = pci_resource_start(pdev, 0);
-   ap->ranges[0].size = pci_resource_len(pdev, 0);
-
-#ifdef CONFIG_X86
-   primary = pdev->resource[PCI_ROM_RESOURCE].flags & 
IORESOURCE_ROM_SHADOW;
-#endif
-   drm_fb_helper_remove_conflicting_framebuffers(ap, "amdgpudrmfb", 
primary);
-   kfree(ap);
-
-   return 0;
-}
-
-
 static int amdgpu_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
 {
@@ -609,7 +587,7 @@ static int amdgpu_pci_probe(struct pci_dev *pdev,
return ret;
 
/* Get rid of things like offb */
-   ret = amdgpu_kick_out_firmware_fb(pdev);
+   ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, 
"amdgpudrmfb");
if (ret)
return ret;
 
-- 
2.18.0

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[PATCH v3 06/13] drm/bochs: use simpler remove_conflicting_pci_framebuffers()

2018-09-01 Thread Michał Mirosław
Signed-off-by: Michał Mirosław 
Acked-by: Daniel Vetter 
---
 drivers/gpu/drm/bochs/bochs_drv.c | 18 +-
 1 file changed, 1 insertion(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/bochs/bochs_drv.c 
b/drivers/gpu/drm/bochs/bochs_drv.c
index 7b20318483e4..c61b40c72b62 100644
--- a/drivers/gpu/drm/bochs/bochs_drv.c
+++ b/drivers/gpu/drm/bochs/bochs_drv.c
@@ -143,22 +143,6 @@ static const struct dev_pm_ops bochs_pm_ops = {
 /* -- */
 /* pci interface  */
 
-static int bochs_kick_out_firmware_fb(struct pci_dev *pdev)
-{
-   struct apertures_struct *ap;
-
-   ap = alloc_apertures(1);
-   if (!ap)
-   return -ENOMEM;
-
-   ap->ranges[0].base = pci_resource_start(pdev, 0);
-   ap->ranges[0].size = pci_resource_len(pdev, 0);
-   drm_fb_helper_remove_conflicting_framebuffers(ap, "bochsdrmfb", false);
-   kfree(ap);
-
-   return 0;
-}
-
 static int bochs_pci_probe(struct pci_dev *pdev,
   const struct pci_device_id *ent)
 {
@@ -171,7 +155,7 @@ static int bochs_pci_probe(struct pci_dev *pdev,
return -ENOMEM;
}
 
-   ret = bochs_kick_out_firmware_fb(pdev);
+   ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, 
"bochsdrmfb");
if (ret)
return ret;
 
-- 
2.18.0

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[PATCH v3 04/13] fbdev: add remove_conflicting_pci_framebuffers()

2018-09-01 Thread Michał Mirosław
Almost all PCI drivers using remove_conflicting_framebuffers() wrap it
with the same code.

---
v2: add kerneldoc for DRM helper
v3: propagate remove_conflicting_framebuffers() return value
  + move kerneldoc to where function is implemented

Signed-off-by: Michał Mirosław 
---
 drivers/video/fbdev/core/fbmem.c | 35 
 include/drm/drm_fb_helper.h  | 12 +++
 include/linux/fb.h   |  2 ++
 3 files changed, 49 insertions(+)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 2de93b5014e3..cd96b1c62bbe 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -34,6 +34,7 @@
 #include 
 #include 
 #include 
+#include 
 
 #include 
 
@@ -1812,6 +1813,40 @@ int remove_conflicting_framebuffers(struct 
apertures_struct *a,
 }
 EXPORT_SYMBOL(remove_conflicting_framebuffers);
 
+/**
+ * remove_conflicting_pci_framebuffers - remove firmware-configured 
framebuffers for PCI devices
+ * @pdev: PCI device
+ * @resource_id: index of PCI BAR configuring framebuffer memory
+ * @name: requesting driver name
+ *
+ * This function removes framebuffer devices (eg. initialized by firmware)
+ * using memory range configured for @pdev's BAR @resource_id.
+ *
+ * The function assumes that PCI device with shadowed ROM drives a primary
+ * display and so kicks out vga16fb.
+ */
+int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, int res_id, 
const char *name)
+{
+   struct apertures_struct *ap;
+   bool primary = false;
+   int err;
+
+   ap = alloc_apertures(1);
+   if (!ap)
+   return -ENOMEM;
+
+   ap->ranges[0].base = pci_resource_start(pdev, res_id);
+   ap->ranges[0].size = pci_resource_len(pdev, res_id);
+#ifdef CONFIG_X86
+   primary = pdev->resource[PCI_ROM_RESOURCE].flags &
+   IORESOURCE_ROM_SHADOW;
+#endif
+   err = remove_conflicting_framebuffers(ap, name, primary);
+   kfree(ap);
+   return err;
+}
+EXPORT_SYMBOL(remove_conflicting_pci_framebuffers);
+
 /**
  * register_framebuffer - registers a frame buffer device
  * @fb_info: frame buffer info structure
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index b069433e7fc1..20ea856db900 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -577,4 +577,16 @@ drm_fb_helper_remove_conflicting_framebuffers(struct 
apertures_struct *a,
 #endif
 }
 
+static inline int
+drm_fb_helper_remove_conflicting_pci_framebuffers(struct pci_dev *pdev,
+ int resource_id,
+ const char *name)
+{
+#if IS_REACHABLE(CONFIG_FB)
+   return remove_conflicting_pci_framebuffers(pdev, resource_id, name);
+#else
+   return 0;
+#endif
+}
+
 #endif
diff --git a/include/linux/fb.h b/include/linux/fb.h
index aa74a228bb92..abeffd55b66a 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -632,6 +632,8 @@ extern ssize_t fb_sys_write(struct fb_info *info, const 
char __user *buf,
 extern int register_framebuffer(struct fb_info *fb_info);
 extern int unregister_framebuffer(struct fb_info *fb_info);
 extern int unlink_framebuffer(struct fb_info *fb_info);
+extern int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, int 
res_id,
+  const char *name);
 extern int remove_conflicting_framebuffers(struct apertures_struct *a,
   const char *name, bool primary);
 extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
-- 
2.18.0

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[PATCH v3 01/13] fbdev: show fbdev number for debugging

2018-09-01 Thread Michał Mirosław
Signed-off-by: Michał Mirosław 
Acked-by: Bartlomiej Zolnierkiewicz 
Acked-by: Daniel Vetter 
---
 drivers/video/fbdev/core/fbmem.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index f741ba8df01b..30a18d4c9de4 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1618,8 +1618,8 @@ static int do_remove_conflicting_framebuffers(struct 
apertures_struct *a,
(primary && gen_aper && gen_aper->count &&
 gen_aper->ranges[0].base == VGA_FB_PHYS)) {
 
-   printk(KERN_INFO "fb: switching to %s from %s\n",
-  name, registered_fb[i]->fix.id);
+   printk(KERN_INFO "fb%d: switching to %s from %s\n",
+  i, name, registered_fb[i]->fix.id);
ret = do_unregister_framebuffer(registered_fb[i]);
if (ret)
return ret;
-- 
2.18.0

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[PATCH v3 03/13] fbdev: add kerneldoc do remove_conflicting_framebuffers()

2018-09-01 Thread Michał Mirosław
Document remove_conflicting_framebuffers() behaviour.

Signed-off-by: Michał Mirosław 
---
 drivers/video/fbdev/core/fbmem.c | 10 ++
 1 file changed, 10 insertions(+)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 0df148eb4699..2de93b5014e3 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1775,6 +1775,16 @@ int unlink_framebuffer(struct fb_info *fb_info)
 }
 EXPORT_SYMBOL(unlink_framebuffer);
 
+/**
+ * remove_conflicting_framebuffers - remove firmware-configured framebuffers
+ * @a: memory range, users of which are to be removed
+ * @name: requesting driver name
+ * @primary: also kick vga16fb if present
+ *
+ * This function removes framebuffer devices (initialized by 
firmware/bootloader)
+ * which use memory range described by @a. If @a is NULL all such devices are
+ * removed.
+ */
 int remove_conflicting_framebuffers(struct apertures_struct *a,
const char *name, bool primary)
 {
-- 
2.18.0

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[PATCH v3 02/13] fbdev: allow apertures == NULL in remove_conflicting_framebuffers()

2018-09-01 Thread Michał Mirosław
Interpret (otherwise-invalid) NULL apertures argument to mean all-memory
range. This will allow to remove several duplicates of this code
from drivers in following patches.

Signed-off-by: Michał Mirosław 
Acked-by: Bartlomiej Zolnierkiewicz 

---
v2: added kerneldoc to corresponding DRM helper
v3: split kerneldoc to another patch
---
 drivers/video/fbdev/core/fbmem.c | 14 ++
 1 file changed, 14 insertions(+)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 30a18d4c9de4..0df148eb4699 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1779,11 +1779,25 @@ int remove_conflicting_framebuffers(struct 
apertures_struct *a,
const char *name, bool primary)
 {
int ret;
+   bool do_free = false;
+
+   if (!a) {
+   a = alloc_apertures(1);
+   if (!a)
+   return -ENOMEM;
+
+   a->ranges[0].base = 0;
+   a->ranges[0].size = ~0;
+   do_free = true;
+   }
 
mutex_lock(_lock);
ret = do_remove_conflicting_framebuffers(a, name, primary);
mutex_unlock(_lock);
 
+   if (do_free)
+   kfree(a);
+
return ret;
 }
 EXPORT_SYMBOL(remove_conflicting_framebuffers);
-- 
2.18.0

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[PATCH v3 00/13] remove_conflicting_framebuffers() cleanup

2018-09-01 Thread Michał Mirosław
This series cleans up duplicated code for replacing firmware FB
driver with proper DRI driver and adds handover support to
Tegra driver.

This is a sligtly updated version of a series sent on 24 Nov 2017.

---
v2:
 - rebased on current drm-next
 - dropped staging/sm750fb changes
 - added kernel docs for DRM helpers
v3:
 - move kerneldoc to fbdev, where functions are implemented
 - split kerneldoc for remove_conflicting_framebuffers()
 - propagate return value in remove_conflicting_pci_framebuffers()

---
Michał Mirosław (13):
  fbdev: show fbdev number for debugging
  fbdev: allow apertures == NULL in remove_conflicting_framebuffers()
  fbdev: add kerneldoc do remove_conflicting_framebuffers()
  fbdev: add remove_conflicting_pci_framebuffers()
  drm/amdgpu: use simpler remove_conflicting_pci_framebuffers()
  drm/bochs: use simpler remove_conflicting_pci_framebuffers()
  drm/cirrus: use simpler remove_conflicting_pci_framebuffers()
  drm/mgag200: use simpler remove_conflicting_pci_framebuffers()
  drm/radeon: use simpler remove_conflicting_pci_framebuffers()
  drm/virtio: use simpler remove_conflicting_pci_framebuffers()
  drm/vc4: use simpler remove_conflicting_framebuffers(NULL)
  drm/sun4i: use simpler remove_conflicting_framebuffers(NULL)
  drm/tegra: kick out simplefb

 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c  | 24 +
 drivers/gpu/drm/bochs/bochs_drv.c| 18 +--
 drivers/gpu/drm/cirrus/cirrus_drv.c  | 23 +
 drivers/gpu/drm/mgag200/mgag200_drv.c| 21 +---
 drivers/gpu/drm/mgag200/mgag200_main.c   |  9 
 drivers/gpu/drm/radeon/radeon_drv.c  | 23 +
 drivers/gpu/drm/sun4i/sun4i_drv.c| 18 +--
 drivers/gpu/drm/tegra/drm.c  |  4 ++
 drivers/gpu/drm/vc4/vc4_drv.c| 20 +---
 drivers/gpu/drm/virtio/virtgpu_drm_bus.c | 24 ++---
 drivers/video/fbdev/core/fbmem.c | 63 +++-
 include/drm/drm_fb_helper.h  | 12 +
 include/linux/fb.h   |  2 +
 13 files changed, 89 insertions(+), 172 deletions(-)

-- 
2.18.0

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Re: [PATCH v2 00/12] remove_conflicting_framebuffers() cleanup

2018-09-01 Thread Michał Mirosław
On Fri, Aug 31, 2018 at 10:07:42AM +0100, Chris Wilson wrote:
[...]
> Ahah, someone is looking at remove_conflicting_framebuffers(). May I
> interest you in a use-after-free?

> [  378.423513] stack segment:  [#1] PREEMPT SMP PTI
> [  378.423530] CPU: 1 PID: 4338 Comm: pm_rpm Tainted: G U
> 4.19.0-rc1-CI-CI_DRM_4746+ #1
> [  378.423548] Hardware name: To Be Filled By O.E.M. To Be Filled By 
> O.E.M./J4205-ITX, BIOS P1.10 09/29/2016
> [  378.423570] RIP: 0010:do_remove_conflicting_framebuffers+0x56/0x170
> [  378.423587] Code: 49 8b 45 00 48 85 c0 74 50 f6 40 0a 08 74 4a 4d 85 e4 48 
> 8b a8 78 04 00 00 74 1f 48 85 ed 74 1a 41 8b 0c 24 31 db 85 c9 74 10 <8b> 55 
> 00 85 d2 75 42 83 c3 01 41 39 1c 24 77 f0 48 85 ed 74 1a 45
> [  378.423620] RSP: 0018:c91dfa88 EFLAGS: 00010202
> [  378.423632] RAX: 880274470008 RBX:  RCX: 
> 0001
> [  378.423646] RDX: 0001 RSI: a025c634 RDI: 
> 88025cc3b428
> [  378.423660] RBP: 6b6b6b6b6b6b6b6b R08: 1edaddfa R09: 
> a025c634
> [  378.423673] R10: c91dfae8 R11: 820de938 R12: 
> 88025cc3b428
> [  378.423687] R13: 8234ca20 R14: 8234cb20 R15: 
> 0001
> [  378.423701] FS:  7fcf03d0a980() GS:880277e8() 
> knlGS:
> [  378.423717] CS:  0010 DS:  ES:  CR0: 80050033
> [  378.423729] CR2: 7fffece1fdb8 CR3: 0001fe32e000 CR4: 
> 003406e0
> [  378.423742] Call Trace:
> [  378.423756]  remove_conflicting_framebuffers+0x28/0x40
> [  378.423856]  i915_driver_load+0x7f5/0x10c0 [i915]
[...]

Looks like registered_fb[] entry is pointing to (partially?) freed or
corrupted fb_info, but I can't see how this could be an effect of
remove_conflicting_framebuffers().

Best Regards,
Michał Mirosław
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[PATCH v2 04/12] drm/amdgpu: use simpler remove_conflicting_pci_framebuffers()

2018-08-30 Thread Michał Mirosław
Signed-off-by: Michał Mirosław 
Acked-by: Alex Deucher 
Acked-by: Daniel Vetter 
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 24 +---
 1 file changed, 1 insertion(+), 23 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 0b19482b36b8..9b6e037719db 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -560,28 +560,6 @@ MODULE_DEVICE_TABLE(pci, pciidlist);
 
 static struct drm_driver kms_driver;
 
-static int amdgpu_kick_out_firmware_fb(struct pci_dev *pdev)
-{
-   struct apertures_struct *ap;
-   bool primary = false;
-
-   ap = alloc_apertures(1);
-   if (!ap)
-   return -ENOMEM;
-
-   ap->ranges[0].base = pci_resource_start(pdev, 0);
-   ap->ranges[0].size = pci_resource_len(pdev, 0);
-
-#ifdef CONFIG_X86
-   primary = pdev->resource[PCI_ROM_RESOURCE].flags & 
IORESOURCE_ROM_SHADOW;
-#endif
-   drm_fb_helper_remove_conflicting_framebuffers(ap, "amdgpudrmfb", 
primary);
-   kfree(ap);
-
-   return 0;
-}
-
-
 static int amdgpu_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
 {
@@ -609,7 +587,7 @@ static int amdgpu_pci_probe(struct pci_dev *pdev,
return ret;
 
/* Get rid of things like offb */
-   ret = amdgpu_kick_out_firmware_fb(pdev);
+   ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, 
"amdgpudrmfb");
if (ret)
return ret;
 
-- 
2.18.0

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[PATCH v2 07/12] drm/mgag200: use simpler remove_conflicting_pci_framebuffers()

2018-08-30 Thread Michał Mirosław
Remove duplicated call, while at it.

Signed-off-by: Michał Mirosław 
Acked-by: Daniel Vetter 
---
 drivers/gpu/drm/mgag200/mgag200_drv.c  | 21 +
 drivers/gpu/drm/mgag200/mgag200_main.c |  9 -
 2 files changed, 1 insertion(+), 29 deletions(-)

diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c 
b/drivers/gpu/drm/mgag200/mgag200_drv.c
index 74cdde2ee474..ac6af4bd9df6 100644
--- a/drivers/gpu/drm/mgag200/mgag200_drv.c
+++ b/drivers/gpu/drm/mgag200/mgag200_drv.c
@@ -42,29 +42,10 @@ static const struct pci_device_id pciidlist[] = {
 
 MODULE_DEVICE_TABLE(pci, pciidlist);
 
-static void mgag200_kick_out_firmware_fb(struct pci_dev *pdev)
-{
-   struct apertures_struct *ap;
-   bool primary = false;
-
-   ap = alloc_apertures(1);
-   if (!ap)
-   return;
-
-   ap->ranges[0].base = pci_resource_start(pdev, 0);
-   ap->ranges[0].size = pci_resource_len(pdev, 0);
-
-#ifdef CONFIG_X86
-   primary = pdev->resource[PCI_ROM_RESOURCE].flags & 
IORESOURCE_ROM_SHADOW;
-#endif
-   drm_fb_helper_remove_conflicting_framebuffers(ap, "mgag200drmfb", 
primary);
-   kfree(ap);
-}
-
 
 static int mga_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
-   mgag200_kick_out_firmware_fb(pdev);
+   drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, 
"mgag200drmfb");
 
return drm_get_pci_dev(pdev, ent, );
 }
diff --git a/drivers/gpu/drm/mgag200/mgag200_main.c 
b/drivers/gpu/drm/mgag200/mgag200_main.c
index 780f983b0294..79d54103d470 100644
--- a/drivers/gpu/drm/mgag200/mgag200_main.c
+++ b/drivers/gpu/drm/mgag200/mgag200_main.c
@@ -124,20 +124,11 @@ static int mga_probe_vram(struct mga_device *mdev, void 
__iomem *mem)
 static int mga_vram_init(struct mga_device *mdev)
 {
void __iomem *mem;
-   struct apertures_struct *aper = alloc_apertures(1);
-   if (!aper)
-   return -ENOMEM;
 
/* BAR 0 is VRAM */
mdev->mc.vram_base = pci_resource_start(mdev->dev->pdev, 0);
mdev->mc.vram_window = pci_resource_len(mdev->dev->pdev, 0);
 
-   aper->ranges[0].base = mdev->mc.vram_base;
-   aper->ranges[0].size = mdev->mc.vram_window;
-
-   drm_fb_helper_remove_conflicting_framebuffers(aper, "mgafb", true);
-   kfree(aper);
-
if (!devm_request_mem_region(mdev->dev->dev, mdev->mc.vram_base, 
mdev->mc.vram_window,
"mgadrmfb_vram")) {
DRM_ERROR("can't reserve VRAM\n");
-- 
2.18.0

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[PATCH v2 03/12] fbdev: add remove_conflicting_pci_framebuffers()

2018-08-30 Thread Michał Mirosław
Almost all PCI drivers using remove_conflicting_framebuffers() wrap it
with the same code.

Signed-off-by: Michał Mirosław 
[for v1]
Acked-by: Bartlomiej Zolnierkiewicz 

---
v2: add kerneldoc for DRM helper
---
 drivers/video/fbdev/core/fbmem.c | 22 ++
 include/drm/drm_fb_helper.h  | 24 
 include/linux/fb.h   |  2 ++
 3 files changed, 48 insertions(+)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 0df148eb4699..927e016487e9 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -34,6 +34,7 @@
 #include 
 #include 
 #include 
+#include 
 
 #include 
 
@@ -1802,6 +1803,27 @@ int remove_conflicting_framebuffers(struct 
apertures_struct *a,
 }
 EXPORT_SYMBOL(remove_conflicting_framebuffers);
 
+int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, int res_id, 
const char *name)
+{
+   struct apertures_struct *ap;
+   bool primary = false;
+
+   ap = alloc_apertures(1);
+   if (!ap)
+   return -ENOMEM;
+
+   ap->ranges[0].base = pci_resource_start(pdev, res_id);
+   ap->ranges[0].size = pci_resource_len(pdev, res_id);
+#ifdef CONFIG_X86
+   primary = pdev->resource[PCI_ROM_RESOURCE].flags &
+   IORESOURCE_ROM_SHADOW;
+#endif
+   remove_conflicting_framebuffers(ap, name, primary);
+   kfree(ap);
+   return 0;
+}
+EXPORT_SYMBOL(remove_conflicting_pci_framebuffers);
+
 /**
  * register_framebuffer - registers a frame buffer device
  * @fb_info: frame buffer info structure
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index 1c1e53abb25d..6e1fc52d1b1b 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -587,4 +587,28 @@ drm_fb_helper_remove_conflicting_framebuffers(struct 
apertures_struct *a,
 #endif
 }
 
+/**
+ * drm_fb_helper_remove_conflicting_framebuffers - remove firmware 
framebuffers for PCI devices
+ * @pdev: PCI device being driven
+ * @resource_id: index of PCI BAR configuring framebuffer memory
+ * @name: requesting driver name
+ *
+ * This function removes framebuffer devices (eg. initialized by firmware)
+ * using memory range configured for @pdev's BAR @resource_id.
+ *
+ * The function assumes that PCI device with shadowed ROM is drives a primary
+ * display and so kicks out vga16fb.
+ */
+static inline int
+drm_fb_helper_remove_conflicting_pci_framebuffers(struct pci_dev *pdev,
+ int resource_id,
+ const char *name)
+{
+#if IS_REACHABLE(CONFIG_FB)
+   return remove_conflicting_pci_framebuffers(pdev, resource_id, name);
+#else
+   return 0;
+#endif
+}
+
 #endif
diff --git a/include/linux/fb.h b/include/linux/fb.h
index aa74a228bb92..abeffd55b66a 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -632,6 +632,8 @@ extern ssize_t fb_sys_write(struct fb_info *info, const 
char __user *buf,
 extern int register_framebuffer(struct fb_info *fb_info);
 extern int unregister_framebuffer(struct fb_info *fb_info);
 extern int unlink_framebuffer(struct fb_info *fb_info);
+extern int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, int 
res_id,
+  const char *name);
 extern int remove_conflicting_framebuffers(struct apertures_struct *a,
   const char *name, bool primary);
 extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
-- 
2.18.0

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[PATCH v2 05/12] drm/bochs: use simpler remove_conflicting_pci_framebuffers()

2018-08-30 Thread Michał Mirosław
Signed-off-by: Michał Mirosław 
Acked-by: Daniel Vetter 
---
 drivers/gpu/drm/bochs/bochs_drv.c | 18 +-
 1 file changed, 1 insertion(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/bochs/bochs_drv.c 
b/drivers/gpu/drm/bochs/bochs_drv.c
index 7b20318483e4..c61b40c72b62 100644
--- a/drivers/gpu/drm/bochs/bochs_drv.c
+++ b/drivers/gpu/drm/bochs/bochs_drv.c
@@ -143,22 +143,6 @@ static const struct dev_pm_ops bochs_pm_ops = {
 /* -- */
 /* pci interface  */
 
-static int bochs_kick_out_firmware_fb(struct pci_dev *pdev)
-{
-   struct apertures_struct *ap;
-
-   ap = alloc_apertures(1);
-   if (!ap)
-   return -ENOMEM;
-
-   ap->ranges[0].base = pci_resource_start(pdev, 0);
-   ap->ranges[0].size = pci_resource_len(pdev, 0);
-   drm_fb_helper_remove_conflicting_framebuffers(ap, "bochsdrmfb", false);
-   kfree(ap);
-
-   return 0;
-}
-
 static int bochs_pci_probe(struct pci_dev *pdev,
   const struct pci_device_id *ent)
 {
@@ -171,7 +155,7 @@ static int bochs_pci_probe(struct pci_dev *pdev,
return -ENOMEM;
}
 
-   ret = bochs_kick_out_firmware_fb(pdev);
+   ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, 
"bochsdrmfb");
if (ret)
return ret;
 
-- 
2.18.0

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[PATCH v2 02/12] fbdev: allow apertures == NULL in remove_conflicting_framebuffers()

2018-08-30 Thread Michał Mirosław
Interpret (otherwise-invalid) NULL apertures argument to mean all-memory
range. This will allow to remove several duplicates of this code from
drivers in following patches.

Signed-off-by: Michał Mirosław 
[for v1]
Acked-by: Bartlomiej Zolnierkiewicz 

---
v2: added kerneldoc to corresponding DRM helper
---
 drivers/video/fbdev/core/fbmem.c | 14 ++
 include/drm/drm_fb_helper.h  | 10 ++
 2 files changed, 24 insertions(+)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 30a18d4c9de4..0df148eb4699 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1779,11 +1779,25 @@ int remove_conflicting_framebuffers(struct 
apertures_struct *a,
const char *name, bool primary)
 {
int ret;
+   bool do_free = false;
+
+   if (!a) {
+   a = alloc_apertures(1);
+   if (!a)
+   return -ENOMEM;
+
+   a->ranges[0].base = 0;
+   a->ranges[0].size = ~0;
+   do_free = true;
+   }
 
mutex_lock(_lock);
ret = do_remove_conflicting_framebuffers(a, name, primary);
mutex_unlock(_lock);
 
+   if (do_free)
+   kfree(a);
+
return ret;
 }
 EXPORT_SYMBOL(remove_conflicting_framebuffers);
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index b069433e7fc1..1c1e53abb25d 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -566,6 +566,16 @@ static inline void 
drm_fb_helper_output_poll_changed(struct drm_device *dev)
 
 #endif
 
+/**
+ * drm_fb_helper_remove_conflicting_framebuffers - remove firmware framebuffers
+ * @a: memory range, users of which are to be removed
+ * @name: requesting driver name
+ * @primary: also kick vga16fb if present
+ *
+ * This function removes framebuffer devices (eg. initialized by firmware)
+ * which use memory range described by @a. If @a is NULL all such devices are
+ * removed.
+ */
 static inline int
 drm_fb_helper_remove_conflicting_framebuffers(struct apertures_struct *a,
  const char *name, bool primary)
-- 
2.18.0

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[PATCH v2 11/12] drm/sun4i: use simpler remove_conflicting_framebuffers(NULL)

2018-08-30 Thread Michał Mirosław
Use remove_conflicting_framebuffers(NULL) instead of duplicating it.

Signed-off-by: Michał Mirosław 
Acked-by: Maxime Ripard 
Acked-by: Daniel Vetter 
---
 drivers/gpu/drm/sun4i/sun4i_drv.c | 18 +-
 1 file changed, 1 insertion(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c 
b/drivers/gpu/drm/sun4i/sun4i_drv.c
index 50d19605c38f..555b5db8036f 100644
--- a/drivers/gpu/drm/sun4i/sun4i_drv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
@@ -60,22 +60,6 @@ static struct drm_driver sun4i_drv_driver = {
/* Frame Buffer Operations */
 };
 
-static void sun4i_remove_framebuffers(void)
-{
-   struct apertures_struct *ap;
-
-   ap = alloc_apertures(1);
-   if (!ap)
-   return;
-
-   /* The framebuffer can be located anywhere in RAM */
-   ap->ranges[0].base = 0;
-   ap->ranges[0].size = ~0;
-
-   drm_fb_helper_remove_conflicting_framebuffers(ap, "sun4i-drm-fb", 
false);
-   kfree(ap);
-}
-
 static int sun4i_drv_bind(struct device *dev)
 {
struct drm_device *drm;
@@ -118,7 +102,7 @@ static int sun4i_drv_bind(struct device *dev)
drm->irq_enabled = true;
 
/* Remove early framebuffers (ie. simplefb) */
-   sun4i_remove_framebuffers();
+   drm_fb_helper_remove_conflicting_framebuffers(NULL, "sun4i-drm-fb", 
false);
 
/* Create our framebuffer */
ret = sun4i_framebuffer_init(drm);
-- 
2.18.0

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[PATCH v2 01/12] fbdev: show fbdev number for debugging

2018-08-30 Thread Michał Mirosław
Signed-off-by: Michał Mirosław 
Acked-by: Bartlomiej Zolnierkiewicz 
Acked-by: Daniel Vetter 
---
 drivers/video/fbdev/core/fbmem.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index f741ba8df01b..30a18d4c9de4 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1618,8 +1618,8 @@ static int do_remove_conflicting_framebuffers(struct 
apertures_struct *a,
(primary && gen_aper && gen_aper->count &&
 gen_aper->ranges[0].base == VGA_FB_PHYS)) {
 
-   printk(KERN_INFO "fb: switching to %s from %s\n",
-  name, registered_fb[i]->fix.id);
+   printk(KERN_INFO "fb%d: switching to %s from %s\n",
+  i, name, registered_fb[i]->fix.id);
ret = do_unregister_framebuffer(registered_fb[i]);
if (ret)
return ret;
-- 
2.18.0

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[PATCH v2 10/12] drm/vc4: use simpler remove_conflicting_framebuffers(NULL)

2018-08-30 Thread Michał Mirosław
Use remove_conflicting_framebuffers(NULL) instead of open-coding it.

Signed-off-by: Michał Mirosław 
Acked-by: Eric Anholt 
Acked-by: Daniel Vetter 
---
 drivers/gpu/drm/vc4/vc4_drv.c | 20 +---
 1 file changed, 1 insertion(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index 94b99c90425a..96bb90325995 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -246,24 +246,6 @@ static void vc4_match_add_drivers(struct device *dev,
}
 }
 
-static void vc4_kick_out_firmware_fb(void)
-{
-   struct apertures_struct *ap;
-
-   ap = alloc_apertures(1);
-   if (!ap)
-   return;
-
-   /* Since VC4 is a UMA device, the simplefb node may have been
-* located anywhere in memory.
-*/
-   ap->ranges[0].base = 0;
-   ap->ranges[0].size = ~0;
-
-   drm_fb_helper_remove_conflicting_framebuffers(ap, "vc4drmfb", false);
-   kfree(ap);
-}
-
 static int vc4_drm_bind(struct device *dev)
 {
struct platform_device *pdev = to_platform_device(dev);
@@ -296,7 +278,7 @@ static int vc4_drm_bind(struct device *dev)
if (ret)
goto gem_destroy;
 
-   vc4_kick_out_firmware_fb();
+   drm_fb_helper_remove_conflicting_framebuffers(NULL, "vc4drmfb", false);
 
ret = drm_dev_register(drm, 0);
if (ret < 0)
-- 
2.18.0

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[PATCH v2 12/12] drm/tegra: kick out simplefb

2018-08-30 Thread Michał Mirosław
Kick out firmware fb when loading Tegra driver.

Signed-off-by: Michał Mirosław 
Acked-by: Daniel Vetter 
---
 drivers/gpu/drm/tegra/drm.c | 4 
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index 7afe2f635f74..b51ec138fed2 100644
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -1203,6 +1203,10 @@ static int host1x_drm_probe(struct host1x_device *dev)
 
dev_set_drvdata(>dev, drm);
 
+   err = drm_fb_helper_remove_conflicting_framebuffers(NULL, "tegradrmfb", 
false);
+   if (err < 0)
+   goto unref;
+
err = drm_dev_register(drm, 0);
if (err < 0)
goto unref;
-- 
2.18.0

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[PATCH v2 06/12] drm/cirrus: use simpler remove_conflicting_pci_framebuffers()

2018-08-30 Thread Michał Mirosław
Signed-off-by: Michał Mirosław 
Acked-by: Daniel Vetter 
---
 drivers/gpu/drm/cirrus/cirrus_drv.c | 23 +--
 1 file changed, 1 insertion(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/cirrus/cirrus_drv.c 
b/drivers/gpu/drm/cirrus/cirrus_drv.c
index 69c4e352dd78..85ed8657c862 100644
--- a/drivers/gpu/drm/cirrus/cirrus_drv.c
+++ b/drivers/gpu/drm/cirrus/cirrus_drv.c
@@ -42,33 +42,12 @@ static const struct pci_device_id pciidlist[] = {
 };
 
 
-static int cirrus_kick_out_firmware_fb(struct pci_dev *pdev)
-{
-   struct apertures_struct *ap;
-   bool primary = false;
-
-   ap = alloc_apertures(1);
-   if (!ap)
-   return -ENOMEM;
-
-   ap->ranges[0].base = pci_resource_start(pdev, 0);
-   ap->ranges[0].size = pci_resource_len(pdev, 0);
-
-#ifdef CONFIG_X86
-   primary = pdev->resource[PCI_ROM_RESOURCE].flags & 
IORESOURCE_ROM_SHADOW;
-#endif
-   drm_fb_helper_remove_conflicting_framebuffers(ap, "cirrusdrmfb", 
primary);
-   kfree(ap);
-
-   return 0;
-}
-
 static int cirrus_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
 {
int ret;
 
-   ret = cirrus_kick_out_firmware_fb(pdev);
+   ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, 
"cirrusdrmfb");
if (ret)
return ret;
 
-- 
2.18.0

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[PATCH v2 00/12] remove_conflicting_framebuffers() cleanup

2018-08-30 Thread Michał Mirosław
This series cleans up duplicated code for replacing firmware FB
driver with proper DRI driver and adds handover support to
Tegra driver.

This is a sligtly updated version of a series sent on 24 Nov 2017.

v2:
 - rebased on current drm-next
 - dropped staging/sm750fb changes
 - added kernel docs for DRM helpers

Michał Mirosław (12):
  fbdev: show fbdev number for debugging
  fbdev: allow apertures == NULL in remove_conflicting_framebuffers()
  fbdev: add remove_conflicting_pci_framebuffers()
  drm/amdgpu: use simpler remove_conflicting_pci_framebuffers()
  drm/bochs: use simpler remove_conflicting_pci_framebuffers()
  drm/cirrus: use simpler remove_conflicting_pci_framebuffers()
  drm/mgag200: use simpler remove_conflicting_pci_framebuffers()
  drm/radeon: use simpler remove_conflicting_pci_framebuffers()
  drm/virtio: use simpler remove_conflicting_pci_framebuffers()
  drm/vc4: use simpler remove_conflicting_framebuffers(NULL)
  drm/sun4i: use simpler remove_conflicting_framebuffers(NULL)
  drm/tegra: kick out simplefb

 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c  | 24 +-
 drivers/gpu/drm/bochs/bochs_drv.c| 18 +--
 drivers/gpu/drm/cirrus/cirrus_drv.c  | 23 +-
 drivers/gpu/drm/mgag200/mgag200_drv.c| 21 +
 drivers/gpu/drm/mgag200/mgag200_main.c   |  9 --
 drivers/gpu/drm/radeon/radeon_drv.c  | 23 +-
 drivers/gpu/drm/sun4i/sun4i_drv.c| 18 +--
 drivers/gpu/drm/tegra/drm.c  |  4 +++
 drivers/gpu/drm/vc4/vc4_drv.c| 20 +---
 drivers/gpu/drm/virtio/virtgpu_drm_bus.c | 24 ++
 drivers/video/fbdev/core/fbmem.c | 40 ++--
 include/drm/drm_fb_helper.h  | 34 
 include/linux/fb.h   |  2 ++
 13 files changed, 88 insertions(+), 172 deletions(-)

-- 
2.18.0

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[PATCH v2 08/12] drm/radeon: use simpler remove_conflicting_pci_framebuffers()

2018-08-30 Thread Michał Mirosław
Signed-off-by: Michał Mirosław 
Acked-by: Alex Deucher 
Acked-by: Daniel Vetter 
---
 drivers/gpu/drm/radeon/radeon_drv.c | 23 +--
 1 file changed, 1 insertion(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_drv.c 
b/drivers/gpu/drm/radeon/radeon_drv.c
index b28288a781ef..36c98a0ec991 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -311,27 +311,6 @@ static struct drm_driver kms_driver;
 
 bool radeon_device_is_virtual(void);
 
-static int radeon_kick_out_firmware_fb(struct pci_dev *pdev)
-{
-   struct apertures_struct *ap;
-   bool primary = false;
-
-   ap = alloc_apertures(1);
-   if (!ap)
-   return -ENOMEM;
-
-   ap->ranges[0].base = pci_resource_start(pdev, 0);
-   ap->ranges[0].size = pci_resource_len(pdev, 0);
-
-#ifdef CONFIG_X86
-   primary = pdev->resource[PCI_ROM_RESOURCE].flags & 
IORESOURCE_ROM_SHADOW;
-#endif
-   drm_fb_helper_remove_conflicting_framebuffers(ap, "radeondrmfb", 
primary);
-   kfree(ap);
-
-   return 0;
-}
-
 static int radeon_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
 {
@@ -341,7 +320,7 @@ static int radeon_pci_probe(struct pci_dev *pdev,
return -EPROBE_DEFER;
 
/* Get rid of things like offb */
-   ret = radeon_kick_out_firmware_fb(pdev);
+   ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, 
"radeondrmfb");
if (ret)
return ret;
 
-- 
2.18.0

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[PATCH v2 09/12] drm/virtio: use simpler remove_conflicting_pci_framebuffers()

2018-08-30 Thread Michał Mirosław
Signed-off-by: Michał Mirosław 
Acked-by: Daniel Vetter 
---
 drivers/gpu/drm/virtio/virtgpu_drm_bus.c | 24 +++-
 1 file changed, 3 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_drm_bus.c 
b/drivers/gpu/drm/virtio/virtgpu_drm_bus.c
index 7df8d0c9026a..115ed546ca4e 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drm_bus.c
+++ b/drivers/gpu/drm/virtio/virtgpu_drm_bus.c
@@ -28,26 +28,6 @@
 
 #include "virtgpu_drv.h"
 
-static void virtio_pci_kick_out_firmware_fb(struct pci_dev *pci_dev)
-{
-   struct apertures_struct *ap;
-   bool primary;
-
-   ap = alloc_apertures(1);
-   if (!ap)
-   return;
-
-   ap->ranges[0].base = pci_resource_start(pci_dev, 0);
-   ap->ranges[0].size = pci_resource_len(pci_dev, 0);
-
-   primary = pci_dev->resource[PCI_ROM_RESOURCE].flags
-   & IORESOURCE_ROM_SHADOW;
-
-   drm_fb_helper_remove_conflicting_framebuffers(ap, "virtiodrmfb", 
primary);
-
-   kfree(ap);
-}
-
 int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev)
 {
struct drm_device *dev;
@@ -69,7 +49,9 @@ int drm_virtio_init(struct drm_driver *driver, struct 
virtio_device *vdev)
 pname);
dev->pdev = pdev;
if (vga)
-   virtio_pci_kick_out_firmware_fb(pdev);
+   drm_fb_helper_remove_conflicting_pci_framebuffers(pdev,
+ 0,
+ 
"virtiodrmfb");
 
snprintf(unique, sizeof(unique), "pci:%s", pname);
ret = drm_dev_set_unique(dev, unique);
-- 
2.18.0

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[PATCH 08/13] drm/virtio: use simpler remove_conflicting_pci_framebuffers()

2017-11-24 Thread Michał Mirosław
Signed-off-by: Michał Mirosław <mirq-li...@rere.qmqm.pl>
---
 drivers/gpu/drm/virtio/virtgpu_drm_bus.c | 24 +++-
 1 file changed, 3 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_drm_bus.c 
b/drivers/gpu/drm/virtio/virtgpu_drm_bus.c
index 7df8d0c9026a..115ed546ca4e 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drm_bus.c
+++ b/drivers/gpu/drm/virtio/virtgpu_drm_bus.c
@@ -28,26 +28,6 @@
 
 #include "virtgpu_drv.h"
 
-static void virtio_pci_kick_out_firmware_fb(struct pci_dev *pci_dev)
-{
-   struct apertures_struct *ap;
-   bool primary;
-
-   ap = alloc_apertures(1);
-   if (!ap)
-   return;
-
-   ap->ranges[0].base = pci_resource_start(pci_dev, 0);
-   ap->ranges[0].size = pci_resource_len(pci_dev, 0);
-
-   primary = pci_dev->resource[PCI_ROM_RESOURCE].flags
-   & IORESOURCE_ROM_SHADOW;
-
-   drm_fb_helper_remove_conflicting_framebuffers(ap, "virtiodrmfb", 
primary);
-
-   kfree(ap);
-}
-
 int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev)
 {
struct drm_device *dev;
@@ -69,7 +49,9 @@ int drm_virtio_init(struct drm_driver *driver, struct 
virtio_device *vdev)
 pname);
dev->pdev = pdev;
if (vga)
-   virtio_pci_kick_out_firmware_fb(pdev);
+   drm_fb_helper_remove_conflicting_pci_framebuffers(pdev,
+ 0,
+ 
"virtiodrmfb");
 
snprintf(unique, sizeof(unique), "pci:%s", pname);
ret = drm_dev_set_unique(dev, unique);
-- 
2.11.0

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[PATCH 00/13] remove_conflicting_framebuffers() cleanup

2017-11-24 Thread Michał Mirosław
This series cleans up duplicated code for replacing firmware FB
driver with proper DRI driver and adds handover support to
Tegra driver.

The last patch is here because it uses new semantics of
remove_conflicting_framebuffers() from this series. This
can be considered independently, though.

---

Michał Mirosław (13):
  fbdev: show fbdev number for debugging
  fbdev: add remove_conflicting_pci_framebuffers()
  drm/amdgpu: use simpler remove_conflicting_pci_framebuffers()
  drm/bochs: use simpler remove_conflicting_pci_framebuffers()
  drm/cirrus: use simpler remove_conflicting_pci_framebuffers()
  drm/mgag200: use simpler remove_conflicting_pci_framebuffers()
  drm/radeon: use simpler remove_conflicting_pci_framebuffers()
  drm/virtio: use simpler remove_conflicting_pci_framebuffers()
  staging: sm750fb: use simpler remove_conflicting_pci_framebuffers()
  fbdev: allow apertures == NULL in remove_conflicting_framebuffers()
  drm/vc4: use simpler remove_conflicting_framebuffers(NULL)
  drm/sun4i: use simpler remove_conflicting_framebuffers(NULL)
  drm/tegra: kick out simplefb

 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c  | 23 +-
 drivers/gpu/drm/bochs/bochs_drv.c| 18 +-
 drivers/gpu/drm/cirrus/cirrus_drv.c  | 23 +-
 drivers/gpu/drm/mgag200/mgag200_drv.c| 21 +
 drivers/gpu/drm/mgag200/mgag200_main.c   |  9 ---
 drivers/gpu/drm/radeon/radeon_drv.c  | 23 +-
 drivers/gpu/drm/sun4i/sun4i_drv.c| 18 +-
 drivers/gpu/drm/tegra/drm.c  |  4 
 drivers/gpu/drm/vc4/vc4_drv.c| 20 +---
 drivers/gpu/drm/virtio/virtgpu_drm_bus.c | 24 +++
 drivers/staging/sm750fb/sm750.c  | 22 +-
 drivers/video/fbdev/core/fbmem.c | 40 ++--
 include/drm/drm_fb_helper.h  | 12 ++
 include/linux/fb.h   |  2 ++
 14 files changed, 67 insertions(+), 192 deletions(-)

-- 
2.11.0

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[PATCH 04/13] drm/bochs: use simpler remove_conflicting_pci_framebuffers()

2017-11-24 Thread Michał Mirosław
Signed-off-by: Michał Mirosław <mirq-li...@rere.qmqm.pl>
---
 drivers/gpu/drm/bochs/bochs_drv.c | 18 +-
 1 file changed, 1 insertion(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/bochs/bochs_drv.c 
b/drivers/gpu/drm/bochs/bochs_drv.c
index 7b20318483e4..c61b40c72b62 100644
--- a/drivers/gpu/drm/bochs/bochs_drv.c
+++ b/drivers/gpu/drm/bochs/bochs_drv.c
@@ -143,22 +143,6 @@ static const struct dev_pm_ops bochs_pm_ops = {
 /* -- */
 /* pci interface  */
 
-static int bochs_kick_out_firmware_fb(struct pci_dev *pdev)
-{
-   struct apertures_struct *ap;
-
-   ap = alloc_apertures(1);
-   if (!ap)
-   return -ENOMEM;
-
-   ap->ranges[0].base = pci_resource_start(pdev, 0);
-   ap->ranges[0].size = pci_resource_len(pdev, 0);
-   drm_fb_helper_remove_conflicting_framebuffers(ap, "bochsdrmfb", false);
-   kfree(ap);
-
-   return 0;
-}
-
 static int bochs_pci_probe(struct pci_dev *pdev,
   const struct pci_device_id *ent)
 {
@@ -171,7 +155,7 @@ static int bochs_pci_probe(struct pci_dev *pdev,
return -ENOMEM;
}
 
-   ret = bochs_kick_out_firmware_fb(pdev);
+   ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, 
"bochsdrmfb");
if (ret)
return ret;
 
-- 
2.11.0

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[PATCH 02/13] fbdev: add remove_conflicting_pci_framebuffers()

2017-11-24 Thread Michał Mirosław
Almost all drivers using remove_conflicting_framebuffers() wrap it with
the same code. Extract common part from PCI drivers into separate
remove_conflicting_pci_framebuffers().

Signed-off-by: Michał Mirosław <mirq-li...@rere.qmqm.pl>
---
 drivers/video/fbdev/core/fbmem.c | 22 ++
 include/drm/drm_fb_helper.h  | 12 
 include/linux/fb.h   |  2 ++
 3 files changed, 36 insertions(+)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 30a18d4c9de4..5ea980e5d3b7 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -34,6 +34,7 @@
 #include 
 #include 
 #include 
+#include 
 
 #include 
 
@@ -1788,6 +1789,27 @@ int remove_conflicting_framebuffers(struct 
apertures_struct *a,
 }
 EXPORT_SYMBOL(remove_conflicting_framebuffers);
 
+int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, int res_id, 
const char *name)
+{
+   struct apertures_struct *ap;
+   bool primary = false;
+
+   ap = alloc_apertures(1);
+   if (!ap)
+   return -ENOMEM;
+
+   ap->ranges[0].base = pci_resource_start(pdev, res_id);
+   ap->ranges[0].size = pci_resource_len(pdev, res_id);
+#ifdef CONFIG_X86
+   primary = pdev->resource[PCI_ROM_RESOURCE].flags &
+   IORESOURCE_ROM_SHADOW;
+#endif
+   remove_conflicting_framebuffers(ap, name, primary);
+   kfree(ap);
+   return 0;
+}
+EXPORT_SYMBOL(remove_conflicting_pci_framebuffers);
+
 /**
  * register_framebuffer - registers a frame buffer device
  * @fb_info: frame buffer info structure
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index 33fe95927742..ac3412290289 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -520,4 +520,16 @@ drm_fb_helper_remove_conflicting_framebuffers(struct 
apertures_struct *a,
 #endif
 }
 
+static inline int
+drm_fb_helper_remove_conflicting_pci_framebuffers(struct pci_dev *pdev,
+ int resource_id,
+ const char *name)
+{
+#if IS_REACHABLE(CONFIG_FB)
+   return remove_conflicting_pci_framebuffers(pdev, resource_id, name);
+#else
+   return 0;
+#endif
+}
+
 #endif
diff --git a/include/linux/fb.h b/include/linux/fb.h
index f4386b0ccf40..4196cb09e58e 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -624,6 +624,8 @@ extern ssize_t fb_sys_write(struct fb_info *info, const 
char __user *buf,
 extern int register_framebuffer(struct fb_info *fb_info);
 extern int unregister_framebuffer(struct fb_info *fb_info);
 extern int unlink_framebuffer(struct fb_info *fb_info);
+extern int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, int 
res_id,
+  const char *name);
 extern int remove_conflicting_framebuffers(struct apertures_struct *a,
   const char *name, bool primary);
 extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
-- 
2.11.0

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[PATCH 05/13] drm/cirrus: use simpler remove_conflicting_pci_framebuffers()

2017-11-24 Thread Michał Mirosław
Signed-off-by: Michał Mirosław <mirq-li...@rere.qmqm.pl>
---
 drivers/gpu/drm/cirrus/cirrus_drv.c | 23 +--
 1 file changed, 1 insertion(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/cirrus/cirrus_drv.c 
b/drivers/gpu/drm/cirrus/cirrus_drv.c
index 69c4e352dd78..85ed8657c862 100644
--- a/drivers/gpu/drm/cirrus/cirrus_drv.c
+++ b/drivers/gpu/drm/cirrus/cirrus_drv.c
@@ -42,33 +42,12 @@ static const struct pci_device_id pciidlist[] = {
 };
 
 
-static int cirrus_kick_out_firmware_fb(struct pci_dev *pdev)
-{
-   struct apertures_struct *ap;
-   bool primary = false;
-
-   ap = alloc_apertures(1);
-   if (!ap)
-   return -ENOMEM;
-
-   ap->ranges[0].base = pci_resource_start(pdev, 0);
-   ap->ranges[0].size = pci_resource_len(pdev, 0);
-
-#ifdef CONFIG_X86
-   primary = pdev->resource[PCI_ROM_RESOURCE].flags & 
IORESOURCE_ROM_SHADOW;
-#endif
-   drm_fb_helper_remove_conflicting_framebuffers(ap, "cirrusdrmfb", 
primary);
-   kfree(ap);
-
-   return 0;
-}
-
 static int cirrus_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
 {
int ret;
 
-   ret = cirrus_kick_out_firmware_fb(pdev);
+   ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, 
"cirrusdrmfb");
if (ret)
return ret;
 
-- 
2.11.0

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[PATCH] virtgpu: remove redundant task_comm copying

2017-08-31 Thread Michał Mirosław
Remove redundant task name copying because:

1. task->comm is already NUL-terminated
2. virtio_gpu_context_create() trims passed dbgname anyway

Signed-off-by: Michał Mirosław <mirq-li...@rere.qmqm.pl>
---
 drivers/gpu/drm/virtio/virtgpu_kms.c | 6 ++
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c 
b/drivers/gpu/drm/virtio/virtgpu_kms.c
index 1e1c90b30d4a..6f5c4a8c0ba8 100644
--- a/drivers/gpu/drm/virtio/virtgpu_kms.c
+++ b/drivers/gpu/drm/virtio/virtgpu_kms.c
@@ -272,20 +272,18 @@ int virtio_gpu_driver_open(struct drm_device *dev, struct 
drm_file *file)
struct virtio_gpu_device *vgdev = dev->dev_private;
struct virtio_gpu_fpriv *vfpriv;
uint32_t id;
-   char dbgname[64], tmpname[TASK_COMM_LEN];
+   char dbgname[TASK_COMM_LEN];
 
/* can't create contexts without 3d renderer */
if (!vgdev->has_virgl_3d)
return 0;
 
-   get_task_comm(tmpname, current);
-   snprintf(dbgname, sizeof(dbgname), "%s", tmpname);
-   dbgname[63] = 0;
/* allocate a virt GPU context for this opener */
vfpriv = kzalloc(sizeof(*vfpriv), GFP_KERNEL);
if (!vfpriv)
return -ENOMEM;
 
+   get_task_comm(dbgname, current);
virtio_gpu_context_create(vgdev, strlen(dbgname), dbgname, );
 
vfpriv->ctx_id = id;
-- 
2.11.0

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Re: [PATCH] xen: netfront: fix declaration order

2011-04-03 Thread Michał Mirosław
On Sun, Apr 03, 2011 at 01:07:19PM +0200, Eric Dumazet wrote:
 Le vendredi 01 avril 2011 à 20:54 -0700, David Miller a écrit :
  From: Michał Mirosław mirq-li...@rere.qmqm.pl
  Date: Thu, 31 Mar 2011 13:01:35 +0200 (CEST)
  
   Not tested in any way. The original code for offload setting seems broken
   as it resets the features on every netback reconnect.
   
   This will set GSO_ROBUST at device creation time (earlier than connect 
   time).
   
   RX checksum offload is forced on - so advertise as it is.
   
   Signed-off-by: Michał Mirosław mirq-li...@rere.qmqm.pl
  Applied.
 Hmm... I had to apply following patch to make it actually compile.

 [PATCH] xen: netfront: fix declaration order
 
 Must declare xennet_fix_features() and xennet_set_features() before
 using them.

Hmm. Sorry for that. Looks like x86 allyesconfig doesn't include this
driver in the build. :/

There really needs to be something like CONFIG_LINT...

Best Regards,
Michał Mirosław

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[PATCH] virtio_net: convert to hw_features

2011-03-31 Thread Michał Mirosław
Signed-off-by: Michał Mirosław mirq-li...@rere.qmqm.pl
---
 drivers/net/virtio_net.c |   46 +++---
 1 files changed, 19 insertions(+), 27 deletions(-)

This is an example conversion to hw_features when constraints are
constant and can be detected at init time.

Build tested only.

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 82dba5a..0cb0b06 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -710,17 +710,6 @@ static int virtnet_close(struct net_device *dev)
return 0;
 }
 
-static int virtnet_set_tx_csum(struct net_device *dev, u32 data)
-{
-   struct virtnet_info *vi = netdev_priv(dev);
-   struct virtio_device *vdev = vi-vdev;
-
-   if (data  !virtio_has_feature(vdev, VIRTIO_NET_F_CSUM))
-   return -ENOSYS;
-
-   return ethtool_op_set_tx_hw_csum(dev, data);
-}
-
 static void virtnet_set_rx_mode(struct net_device *dev)
 {
struct virtnet_info *vi = netdev_priv(dev);
@@ -822,10 +811,6 @@ static void virtnet_vlan_rx_kill_vid(struct net_device 
*dev, u16 vid)
 }
 
 static const struct ethtool_ops virtnet_ethtool_ops = {
-   .set_tx_csum = virtnet_set_tx_csum,
-   .set_sg = ethtool_op_set_sg,
-   .set_tso = ethtool_op_set_tso,
-   .set_ufo = ethtool_op_set_ufo,
.get_link = ethtool_op_get_link,
 };
 
@@ -912,22 +897,29 @@ static int virtnet_probe(struct virtio_device *vdev)
SET_NETDEV_DEV(dev, vdev-dev);
 
/* Do we support hardware checksums? */
-   if (csum  virtio_has_feature(vdev, VIRTIO_NET_F_CSUM)) {
+   if (virtio_has_feature(vdev, VIRTIO_NET_F_CSUM)) {
/* This opens up the world of extra features. */
-   dev-features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST;
-   if (gso  virtio_has_feature(vdev, VIRTIO_NET_F_GSO)) {
-   dev-features |= NETIF_F_TSO | NETIF_F_UFO
+   dev-hw_features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST;
+   if (csum)
+   dev-features |= 
NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST;
+
+   if (virtio_has_feature(vdev, VIRTIO_NET_F_GSO)) {
+   dev-hw_features |= NETIF_F_TSO | NETIF_F_UFO
| NETIF_F_TSO_ECN | NETIF_F_TSO6;
}
/* Individual feature bits: what can host handle? */
-   if (gso  virtio_has_feature(vdev, VIRTIO_NET_F_HOST_TSO4))
-   dev-features |= NETIF_F_TSO;
-   if (gso  virtio_has_feature(vdev, VIRTIO_NET_F_HOST_TSO6))
-   dev-features |= NETIF_F_TSO6;
-   if (gso  virtio_has_feature(vdev, VIRTIO_NET_F_HOST_ECN))
-   dev-features |= NETIF_F_TSO_ECN;
-   if (gso  virtio_has_feature(vdev, VIRTIO_NET_F_HOST_UFO))
-   dev-features |= NETIF_F_UFO;
+   if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_TSO4))
+   dev-hw_features |= NETIF_F_TSO;
+   if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_TSO6))
+   dev-hw_features |= NETIF_F_TSO6;
+   if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_ECN))
+   dev-hw_features |= NETIF_F_TSO_ECN;
+   if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_UFO))
+   dev-hw_features |= NETIF_F_UFO;
+
+   if (gso)
+   dev-features |= dev-hw_features  
(NETIF_F_ALL_TSO|NETIF_F_UFO);
+   /* (!csum  gso) case will be fixed by register_netdev() */
}
 
/* Configuration may specify what MAC to use.  Otherwise random. */
-- 
1.7.2.5

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Re: [PATCH RESEND] net: convert xen-netfront to hw_features

2011-03-31 Thread Michał Mirosław
On Thu, Mar 31, 2011 at 12:13:30PM +0100, Ian Campbell wrote:
 On Thu, 2011-03-31 at 12:01 +0100, Michał Mirosław wrote:
  Not tested in any way. The original code for offload setting seems broken
  as it resets the features on every netback reconnect.
 Thanks, I've got a pending TODO item to test this and propagate similar
 changes to netback. I hope to get to it soon...
 
 Is this urgent (for 2.6.39) IYHO? I think it's been broken this way for
 a long time now...

This probably affects only people who are using suspending VM's to disk or
[live] migration. The bug is hard to notice if you're not looking for it.
I only noticed it after trying to change the code.

Best Regards,
Michał Mirosław
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