On Sat, Feb 10, 2024 at 02:26:25AM +0100, Niklas Cassel wrote:
> The hardware description for BARs is scattered in many different variables
> in pci_epc_features. Some of these things are mutually exclusive, so it
> can create confusion over which variable that has precedence over another.
>
> Improve the situation by creating a struct pci_epc_bar_desc, and a new
> enum pci_epc_bar_type, and convert the endpoint controller drivers to use
> this more well defined format.
>
> Signed-off-by: Niklas Cassel <cas...@kernel.org>
> ---
> drivers/pci/controller/dwc/pci-imx6.c | 3 +-
> drivers/pci/controller/dwc/pci-keystone.c | 12 +++----
> .../pci/controller/dwc/pci-layerscape-ep.c | 5 ++-
> drivers/pci/controller/dwc/pcie-keembay.c | 8 +++--
> drivers/pci/controller/dwc/pcie-rcar-gen4.c | 4 ++-
> drivers/pci/controller/dwc/pcie-tegra194.c | 10 ++++--
> drivers/pci/controller/dwc/pcie-uniphier-ep.c | 15 ++++++--
> drivers/pci/controller/pcie-rcar-ep.c | 14 +++++---
> drivers/pci/endpoint/functions/pci-epf-ntb.c | 4 +--
> drivers/pci/endpoint/functions/pci-epf-test.c | 8 ++---
> drivers/pci/endpoint/functions/pci-epf-vntb.c | 2 +-
> drivers/pci/endpoint/pci-epc-core.c | 32 +++++++++--------
> drivers/pci/endpoint/pci-epf-core.c | 15 ++++----
> include/linux/pci-epc.h | 34 +++++++++++++++----
> 14 files changed, 108 insertions(+), 58 deletions(-)
>
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c
> b/drivers/pci/controller/dwc/pci-imx6.c
> index dc2c036ab28c..47a9a96484ed 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -1081,7 +1081,8 @@ static const struct pci_epc_features
> imx8m_pcie_epc_features = {
> .linkup_notifier = false,
> .msi_capable = true,
> .msix_capable = false,
> - .reserved_bar = 1 << BAR_1 | 1 << BAR_3,
> + .bar[BAR_1] = { .type = BAR_RESERVED, },
> + .bar[BAR_3] = { .type = BAR_RESERVED, },
> .align = SZ_64K,
> };
>
> diff --git a/drivers/pci/controller/dwc/pci-keystone.c
> b/drivers/pci/controller/dwc/pci-keystone.c
> index c0c62533a3f1..b2b93b4fa82d 100644
> --- a/drivers/pci/controller/dwc/pci-keystone.c
> +++ b/drivers/pci/controller/dwc/pci-keystone.c
> @@ -924,12 +924,12 @@ static const struct pci_epc_features
> ks_pcie_am654_epc_features = {
> .linkup_notifier = false,
> .msi_capable = true,
> .msix_capable = true,
> - .reserved_bar = 1 << BAR_0 | 1 << BAR_1,
> - .bar_fixed_64bit = 1 << BAR_0,
> - .bar_fixed_size[2] = SZ_1M,
> - .bar_fixed_size[3] = SZ_64K,
> - .bar_fixed_size[4] = 256,
> - .bar_fixed_size[5] = SZ_1M,
> + .bar[BAR_0] = { .type = BAR_RESERVED, .only_64bit = true, },
> + .bar[BAR_1] = { .type = BAR_RESERVED, },
> + .bar[BAR_2] = { .type = BAR_FIXED, .fixed_size = SZ_1M, },
> + .bar[BAR_3] = { .type = BAR_FIXED, .fixed_size = SZ_64K, },
> + .bar[BAR_4] = { .type = BAR_FIXED, .fixed_size = 256, },
> + .bar[BAR_5] = { .type = BAR_FIXED, .fixed_size = SZ_1M, },
> .align = SZ_1M,
> };
>
> diff --git a/drivers/pci/controller/dwc/pci-layerscape-ep.c
> b/drivers/pci/controller/dwc/pci-layerscape-ep.c
> index 2e398494e7c0..1f6ee1460ec2 100644
> --- a/drivers/pci/controller/dwc/pci-layerscape-ep.c
> +++ b/drivers/pci/controller/dwc/pci-layerscape-ep.c
> @@ -250,7 +250,10 @@ static int __init ls_pcie_ep_probe(struct
> platform_device *pdev)
> pci->dev = dev;
> pci->ops = pcie->drvdata->dw_pcie_ops;
>
> - ls_epc->bar_fixed_64bit = (1 << BAR_2) | (1 << BAR_4);
> + ls_epc->bar[BAR_2].only_64bit = true;
> + ls_epc->bar[BAR_3].type = BAR_RESERVED;
BAR_3 and BAR_4 were not reserved previously.
> + ls_epc->bar[BAR_4].only_64bit = true;
> + ls_epc->bar[BAR_5].type = BAR_RESERVED;
> ls_epc->linkup_notifier = true;
>
> pcie->pci = pci;
> diff --git a/drivers/pci/controller/dwc/pcie-keembay.c
> b/drivers/pci/controller/dwc/pcie-keembay.c
> index 208d3b0ba196..5e8e54f597dd 100644
> --- a/drivers/pci/controller/dwc/pcie-keembay.c
> +++ b/drivers/pci/controller/dwc/pcie-keembay.c
> @@ -312,8 +312,12 @@ static const struct pci_epc_features
> keembay_pcie_epc_features = {
> .linkup_notifier = false,
> .msi_capable = true,
> .msix_capable = true,
> - .reserved_bar = BIT(BAR_1) | BIT(BAR_3) | BIT(BAR_5),
> - .bar_fixed_64bit = BIT(BAR_0) | BIT(BAR_2) | BIT(BAR_4),
> + .bar[BAR_0] = { .only_64bit = true, },
> + .bar[BAR_1] = { .type = BAR_RESERVED, },
> + .bar[BAR_2] = { .only_64bit = true, },
> + .bar[BAR_3] = { .type = BAR_RESERVED, },
> + .bar[BAR_4] = { .only_64bit = true, },
> + .bar[BAR_5] = { .type = BAR_RESERVED, },
> .align = SZ_16K,
> };
>
> diff --git a/drivers/pci/controller/dwc/pcie-rcar-gen4.c
> b/drivers/pci/controller/dwc/pcie-rcar-gen4.c
> index e9166619b1f9..0be760ed420b 100644
> --- a/drivers/pci/controller/dwc/pcie-rcar-gen4.c
> +++ b/drivers/pci/controller/dwc/pcie-rcar-gen4.c
> @@ -383,7 +383,9 @@ static const struct pci_epc_features
> rcar_gen4_pcie_epc_features = {
> .linkup_notifier = false,
> .msi_capable = true,
> .msix_capable = false,
> - .reserved_bar = 1 << BAR_1 | 1 << BAR_3 | 1 << BAR_5,
> + .bar[BAR_1] = { .type = BAR_RESERVED, },
> + .bar[BAR_3] = { .type = BAR_RESERVED, },
> + .bar[BAR_5] = { .type = BAR_RESERVED, },
> .align = SZ_1M,
> };
>
> diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c
> b/drivers/pci/controller/dwc/pcie-tegra194.c
> index 7afa9e9aabe2..1f7b662cb8e1 100644
> --- a/drivers/pci/controller/dwc/pcie-tegra194.c
> +++ b/drivers/pci/controller/dwc/pcie-tegra194.c
> @@ -2007,9 +2007,13 @@ static const struct pci_epc_features
> tegra_pcie_epc_features = {
> .core_init_notifier = true,
> .msi_capable = false,
> .msix_capable = false,
> - .reserved_bar = 1 << BAR_2 | 1 << BAR_3 | 1 << BAR_4 | 1 << BAR_5,
> - .bar_fixed_64bit = 1 << BAR_0,
> - .bar_fixed_size[0] = SZ_1M,
> + .bar[BAR_0] = { .type = BAR_FIXED, .fixed_size = SZ_1M,
> + .only_64bit = true, },
> + .bar[BAR_1] = { .type = BAR_RESERVED, },
Same, BAR_1 was not reserved.
> + .bar[BAR_2] = { .type = BAR_RESERVED, },
> + .bar[BAR_3] = { .type = BAR_RESERVED, },
> + .bar[BAR_4] = { .type = BAR_RESERVED, },
> + .bar[BAR_5] = { .type = BAR_RESERVED, },
> };
>
> static const struct pci_epc_features*
> diff --git a/drivers/pci/controller/dwc/pcie-uniphier-ep.c
> b/drivers/pci/controller/dwc/pcie-uniphier-ep.c
> index 3fced0d3e851..265f65fc673f 100644
> --- a/drivers/pci/controller/dwc/pcie-uniphier-ep.c
> +++ b/drivers/pci/controller/dwc/pcie-uniphier-ep.c
> @@ -411,8 +411,12 @@ static const struct uniphier_pcie_ep_soc_data
> uniphier_pro5_data = {
> .msi_capable = true,
> .msix_capable = false,
> .align = 1 << 16,
> - .bar_fixed_64bit = BIT(BAR_0) | BIT(BAR_2) | BIT(BAR_4),
> - .reserved_bar = BIT(BAR_4),
> + .bar[BAR_0] = { .only_64bit = true, },
> + .bar[BAR_1] = { .type = BAR_RESERVED, },
Same as above.
> + .bar[BAR_2] = { .only_64bit = true, },
> + .bar[BAR_3] = { .type = BAR_RESERVED, },
> + .bar[BAR_4] = { .type = BAR_RESERVED, .only_64bit = true, },
> + .bar[BAR_5] = { .type = BAR_RESERVED, },
> },
> };
>
> @@ -425,7 +429,12 @@ static const struct uniphier_pcie_ep_soc_data
> uniphier_nx1_data = {
> .msi_capable = true,
> .msix_capable = false,
> .align = 1 << 12,
> - .bar_fixed_64bit = BIT(BAR_0) | BIT(BAR_2) | BIT(BAR_4),
> + .bar[BAR_0] = { .only_64bit = true, },
> + .bar[BAR_1] = { .type = BAR_RESERVED, },
Same as above.
- Mani
--
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