Hi Thomas,
On Tue, Nov 24, 2020 at 12:38:24PM +0100, Thomas Zimmermann wrote:
> We have DRM drivers based on USB, SPI and platform devices. All of them
> are fine with storing their device reference in struct drm_device.dev.
> PCI devices should be no exception. Therefore struct drm_device.pdev is
> deprecated.
>
> Instead upcast from struct drm_device.dev with to_pci_dev(). PCI-specific
> code can use dev_is_pci() to test for a PCI device. This patch changes
> the DRM core code and documentation accordingly. Struct drm_device.pdev
> is being moved to legacy status.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
> ---
> drivers/gpu/drm/drm_agpsupport.c | 9 ++++++---
> drivers/gpu/drm/drm_bufs.c | 4 ++--
> drivers/gpu/drm/drm_edid.c | 7 ++++++-
> drivers/gpu/drm/drm_irq.c | 12 +++++++-----
> drivers/gpu/drm/drm_pci.c | 26 +++++++++++++++-----------
> drivers/gpu/drm/drm_vm.c | 2 +-
> include/drm/drm_device.h | 12 +++++++++---
> 7 files changed, 46 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_agpsupport.c b/drivers/gpu/drm/drm_agpsupport.c
> index 4c7ad46fdd21..a4040fe4f4ba 100644
> --- a/drivers/gpu/drm/drm_agpsupport.c
> +++ b/drivers/gpu/drm/drm_agpsupport.c
> @@ -103,11 +103,13 @@ int drm_agp_info_ioctl(struct drm_device *dev, void *data,
> */
> int drm_agp_acquire(struct drm_device *dev)
> {
> + struct pci_dev *pdev = to_pci_dev(dev->dev);
> +
> if (!dev->agp)
> return -ENODEV;
> if (dev->agp->acquired)
> return -EBUSY;
> - dev->agp->bridge = agp_backend_acquire(dev->pdev);
> + dev->agp->bridge = agp_backend_acquire(pdev);
> if (!dev->agp->bridge)
> return -ENODEV;
> dev->agp->acquired = 1;
> @@ -402,14 +404,15 @@ int drm_agp_free_ioctl(struct drm_device *dev, void *data,
> */
> struct drm_agp_head *drm_agp_init(struct drm_device *dev)
> {
> + struct pci_dev *pdev = to_pci_dev(dev->dev);
> struct drm_agp_head *head = NULL;
>
> head = kzalloc(sizeof(*head), GFP_KERNEL);
> if (!head)
> return NULL;
> - head->bridge = agp_find_bridge(dev->pdev);
> + head->bridge = agp_find_bridge(pdev);
> if (!head->bridge) {
> - head->bridge = agp_backend_acquire(dev->pdev);
> + head->bridge = agp_backend_acquire(pdev);
> if (!head->bridge) {
> kfree(head);
> return NULL;
> diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c
> index 7a01d0918861..1da8b360b60a 100644
> --- a/drivers/gpu/drm/drm_bufs.c
> +++ b/drivers/gpu/drm/drm_bufs.c
> @@ -325,7 +325,7 @@ static int drm_addmap_core(struct drm_device *dev, resource_size_t offset,
> * As we're limiting the address to 2^32-1 (or less),
> * casting it down to 32 bits is no problem, but we
> * need to point to a 64bit variable first. */
> - map->handle = dma_alloc_coherent(&dev->pdev->dev,
> + map->handle = dma_alloc_coherent(dev->dev,
> map->size,
> &map->offset,
> GFP_KERNEL);
> @@ -555,7 +555,7 @@ int drm_legacy_rmmap_locked(struct drm_device *dev, struct drm_local_map *map)
> case _DRM_SCATTER_GATHER:
> break;
> case _DRM_CONSISTENT:
> - dma_free_coherent(&dev->pdev->dev,
> + dma_free_coherent(dev->dev,
> map->size,
> map->handle,
> map->offset);
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 74f5a3197214..555a04ce2179 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -32,6 +32,7 @@
> #include <linux/i2c.h>
> #include <linux/kernel.h>
> #include <linux/module.h>
> +#include <linux/pci.h>
> #include <linux/slab.h>
> #include <linux/vga_switcheroo.h>
>
> @@ -2075,9 +2076,13 @@ EXPORT_SYMBOL(drm_get_edid);
> struct edid *drm_get_edid_switcheroo(struct drm_connector *connector,
> struct i2c_adapter *adapter)
> {
> - struct pci_dev *pdev = connector->dev->pdev;
> + struct drm_device *dev = connector->dev;
> + struct pci_dev *pdev = to_pci_dev(dev->dev);
> struct edid *edid;
Maybe add a comment that explain why this can trigger - so people are
helped it they are catched by this.
As it is now it is not even mentioned in the changelog.
> + if (drm_WARN_ON_ONCE(dev, !dev_is_pci(dev->dev)))
> + return NULL;
> +
> vga_switcheroo_lock_ddc(pdev);
> edid = drm_get_edid(connector, adapter);
> vga_switcheroo_unlock_ddc(pdev);
> diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
> index 09d6e9e2e075..22986a9a593b 100644
> --- a/drivers/gpu/drm/drm_irq.c
> +++ b/drivers/gpu/drm/drm_irq.c
> @@ -122,7 +122,7 @@ int drm_irq_install(struct drm_device *dev, int irq)
> dev->driver->irq_preinstall(dev);
>
> /* PCI devices require shared interrupts. */
> - if (dev->pdev)
> + if (dev_is_pci(dev->dev))
> sh_flags = IRQF_SHARED;
>
> ret = request_irq(irq, dev->driver->irq_handler,
> @@ -140,7 +140,7 @@ int drm_irq_install(struct drm_device *dev, int irq)
> if (ret < 0) {
> dev->irq_enabled = false;
> if (drm_core_check_feature(dev, DRIVER_LEGACY))
> - vga_client_register(dev->pdev, NULL, NULL, NULL);
> + vga_client_register(to_pci_dev(dev->dev), NULL, NULL, NULL);
> free_irq(irq, dev);
> } else {
> dev->irq = irq;
> @@ -203,7 +203,7 @@ int drm_irq_uninstall(struct drm_device *dev)
> DRM_DEBUG("irq=%d\n", dev->irq);
>
> if (drm_core_check_feature(dev, DRIVER_LEGACY))
> - vga_client_register(dev->pdev, NULL, NULL, NULL);
> + vga_client_register(to_pci_dev(dev->dev), NULL, NULL, NULL);
>
> if (dev->driver->irq_uninstall)
> dev->driver->irq_uninstall(dev);
> @@ -220,6 +220,7 @@ int drm_legacy_irq_control(struct drm_device *dev, void *data,
> {
> struct drm_control *ctl = data;
> int ret = 0, irq;
> + struct pci_dev *pdev;
>
> /* if we haven't irq we fallback for compatibility reasons -
> * this used to be a separate function in drm_dma.h
> @@ -230,12 +231,13 @@ int drm_legacy_irq_control(struct drm_device *dev, void *data,
> if (!drm_core_check_feature(dev, DRIVER_LEGACY))
> return 0;
> /* UMS was only ever supported on pci devices. */
> - if (WARN_ON(!dev->pdev))
> + if (WARN_ON(!dev_is_pci(dev->dev)))
> return -EINVAL;
>
> switch (ctl->func) {
> case DRM_INST_HANDLER:
> - irq = dev->pdev->irq;
> + pdev = to_pci_dev(dev->dev);
> + irq = pdev->irq;
>
> if (dev->if_version < DRM_IF_VERSION(1, 2) &&
> ctl->irq != irq)
> diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c
> index 6dba4b8ce4fe..c7868418e36d 100644
> --- a/drivers/gpu/drm/drm_pci.c
> +++ b/drivers/gpu/drm/drm_pci.c
> @@ -65,7 +65,7 @@ drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t ali
> return NULL;
>
> dmah->size = size;
> - dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size,
> + dmah->vaddr = dma_alloc_coherent(dev->dev, size,
> &dmah->busaddr,
> GFP_KERNEL);
>
> @@ -88,7 +88,7 @@ EXPORT_SYMBOL(drm_pci_alloc);
> */
> void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
> {
> - dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
> + dma_free_coherent(dev->dev, dmah->size, dmah->vaddr,
> dmah->busaddr);
> kfree(dmah);
> }
> @@ -107,16 +107,18 @@ static int drm_get_pci_domain(struct drm_device *dev)
> return 0;
> #endif /* __alpha__ */
>
> - return pci_domain_nr(dev->pdev->bus);
> + return pci_domain_nr(to_pci_dev(dev->dev)->bus);
> }
>
> int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
> {
> + struct pci_dev *pdev = to_pci_dev(dev->dev);
> +
> master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d",
> drm_get_pci_domain(dev),
> - dev->pdev->bus->number,
> - PCI_SLOT(dev->pdev->devfn),
> - PCI_FUNC(dev->pdev->devfn));
> + pdev->bus->number,
> + PCI_SLOT(pdev->devfn),
> + PCI_FUNC(pdev->devfn));
> if (!master->unique)
> return -ENOMEM;
>
> @@ -126,12 +128,14 @@ int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
>
> static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
> {
> + struct pci_dev *pdev = to_pci_dev(dev->dev);
> +
> if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
> - (p->busnum & 0xff) != dev->pdev->bus->number ||
> - p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn))
> + (p->busnum & 0xff) != pdev->bus->number ||
> + p->devnum != PCI_SLOT(pdev->devfn) || p->funcnum != PCI_FUNC(pdev->devfn))
> return -EINVAL;
>
> - p->irq = dev->pdev->irq;
> + p->irq = pdev->irq;
>
> DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
> p->irq);
> @@ -159,7 +163,7 @@ int drm_legacy_irq_by_busid(struct drm_device *dev, void *data,
> return -EOPNOTSUPP;
>
> /* UMS was only ever support on PCI devices. */
> - if (WARN_ON(!dev->pdev))
> + if (WARN_ON(!dev_is_pci(dev->dev)))
> return -EINVAL;
>
> if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
> @@ -183,7 +187,7 @@ void drm_pci_agp_destroy(struct drm_device *dev)
> static void drm_pci_agp_init(struct drm_device *dev)
> {
> if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
> - if (pci_find_capability(dev->pdev, PCI_CAP_ID_AGP))
> + if (pci_find_capability(to_pci_dev(dev->dev), PCI_CAP_ID_AGP))
> dev->agp = drm_agp_init(dev);
> if (dev->agp) {
> dev->agp->agp_mtrr = arch_phys_wc_add(
> diff --git a/drivers/gpu/drm/drm_vm.c b/drivers/gpu/drm/drm_vm.c
> index 6d5a03b32238..9b3b989d7cad 100644
> --- a/drivers/gpu/drm/drm_vm.c
> +++ b/drivers/gpu/drm/drm_vm.c
> @@ -278,7 +278,7 @@ static void drm_vm_shm_close(struct vm_area_struct *vma)
> case _DRM_SCATTER_GATHER:
> break;
> case _DRM_CONSISTENT:
> - dma_free_coherent(&dev->pdev->dev,
> + dma_free_coherent(dev->dev,
> map->size,
> map->handle,
> map->offset);
> diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h
> index 283a93ce4617..9d9db178119a 100644
> --- a/include/drm/drm_device.h
> +++ b/include/drm/drm_device.h
> @@ -290,9 +290,6 @@ struct drm_device {
> /** @agp: AGP data */
> struct drm_agp_head *agp;
>
> - /** @pdev: PCI device structure */
> - struct pci_dev *pdev;
> -
> #ifdef __alpha__
> /** @hose: PCI hose, only used on ALPHA platforms. */
> struct pci_controller *hose;
> @@ -336,6 +333,15 @@ struct drm_device {
> /* Everything below here is for legacy driver, never use! */
> /* private: */
> #if IS_ENABLED(CONFIG_DRM_LEGACY)
> + /**
> + * @pdev: PCI device structure
> + *
> + * This is deprecated. to get the PCI device, upcast from @dev
Capital T after '.'
> + * with to_pci_dev(). To test if the hardware is a PCI device,
> + * use dev_is_pci() with @dev.
> + */
> + struct pci_dev *pdev;
> +
> /* Context handle management - linked list of context handles */
> struct list_head ctxlist;
>
> --
> 2.29.2
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
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