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SubjectRe: [PATCH V3 10/29] drm/nouveau: deprecate pci_get_bus_and_slot()
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+nouveau@lists.freedesktop.org


On 11/27/2017 11:57 AM, Sinan Kaya wrote:
> pci_get_bus_and_slot() is restrictive such that it assumes domain=0 as
> where a PCI device is present. This restricts the device drivers to be
> reused for other domain numbers.
>
> Getting ready to remove pci_get_bus_and_slot() function in favor of
> pci_get_domain_bus_and_slot().
>
> Replace pci_get_bus_and_slot() with pci_get_domain_bus_and_slot()
> and extract the domain number from
> 1. struct pci_dev
> 2. struct pci_dev through drm_device->pdev
> 3. struct pci_dev through fb->subdev->drm_device->pdev
>
> Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
> ---
> drivers/gpu/drm/nouveau/dispnv04/arb.c | 4 +++-
> drivers/gpu/drm/nouveau/dispnv04/hw.c | 10 +++++++---
> drivers/gpu/drm/nouveau/nouveau_drm.c | 3 ++-
> drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv1a.c | 10 +++++++++-
> 4 files changed, 21 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/nouveau/dispnv04/arb.c b/drivers/gpu/drm/nouveau/dispnv04/arb.c
> index 90075b6..c79160c 100644
> --- a/drivers/gpu/drm/nouveau/dispnv04/arb.c
> +++ b/drivers/gpu/drm/nouveau/dispnv04/arb.c
> @@ -213,8 +213,10 @@ struct nv_sim_state {
> if ((dev->pdev->device & 0xffff) == 0x01a0 /*CHIPSET_NFORCE*/ ||
> (dev->pdev->device & 0xffff) == 0x01f0 /*CHIPSET_NFORCE2*/) {
> uint32_t type;
> + int domain = pci_domain_nr(dev->pdev->bus);
>
> - pci_read_config_dword(pci_get_bus_and_slot(0, 1), 0x7c, &type);
> + pci_read_config_dword(pci_get_domain_bus_and_slot(domain, 0, 1),
> + 0x7c, &type);
>
> sim_data.memory_type = (type >> 12) & 1;
> sim_data.memory_width = 64;
> diff --git a/drivers/gpu/drm/nouveau/dispnv04/hw.c b/drivers/gpu/drm/nouveau/dispnv04/hw.c
> index b985990..0c9bdf0 100644
> --- a/drivers/gpu/drm/nouveau/dispnv04/hw.c
> +++ b/drivers/gpu/drm/nouveau/dispnv04/hw.c
> @@ -216,12 +216,15 @@
> {
> struct nvkm_pll_vals pllvals;
> int ret;
> + int domain;
> +
> + domain = pci_domain_nr(dev->pdev->bus);
>
> if (plltype == PLL_MEMORY &&
> (dev->pdev->device & 0x0ff0) == CHIPSET_NFORCE) {
> uint32_t mpllP;
> -
> - pci_read_config_dword(pci_get_bus_and_slot(0, 3), 0x6c, &mpllP);
> + pci_read_config_dword(pci_get_domain_bus_and_slot(domain, 0, 3),
> + 0x6c, &mpllP);
> mpllP = (mpllP >> 8) & 0xf;
> if (!mpllP)
> mpllP = 4;
> @@ -232,7 +235,8 @@
> (dev->pdev->device & 0xff0) == CHIPSET_NFORCE2) {
> uint32_t clock;
>
> - pci_read_config_dword(pci_get_bus_and_slot(0, 5), 0x4c, &clock);
> + pci_read_config_dword(pci_get_domain_bus_and_slot(domain, 0, 5),
> + 0x4c, &clock);
> return clock / 1000;
> }
>
> diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
> index 595630d..0b6c639 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_drm.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
> @@ -406,7 +406,8 @@ static int nouveau_drm_probe(struct pci_dev *pdev,
> }
>
> /* subfunction one is a hdmi audio device? */
> - drm->hdmi_device = pci_get_bus_and_slot((unsigned int)pdev->bus->number,
> + drm->hdmi_device = pci_get_domain_bus_and_slot(pci_domain_nr(pdev->bus),
> + (unsigned int)pdev->bus->number,
> PCI_DEVFN(PCI_SLOT(pdev->devfn), 1));
>
> if (!drm->hdmi_device) {
> diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv1a.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv1a.c
> index 3c6a871..8849b71 100644
> --- a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv1a.c
> +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv1a.c
> @@ -28,8 +28,16 @@
> {
> struct pci_dev *bridge;
> u32 mem, mib;
> + int domain = 0;
> + struct pci_dev *pdev = NULL;
>
> - bridge = pci_get_bus_and_slot(0, PCI_DEVFN(0, 1));
> + if (dev_is_pci(fb->subdev.device->dev))
> + pdev = to_pci_dev(fb->subdev.device->dev);
> +
> + if (pdev)
> + domain = pci_domain_nr(pdev->bus);
> +
> + bridge = pci_get_domain_bus_and_slot(domain, 0, PCI_DEVFN(0, 1));
> if (!bridge) {
> nvkm_error(&fb->subdev, "no bridge device\n");
> return -ENODEV;
>


--
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.

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