From: Hans Zhang <18255117159@163.com>
To: bhelgaas@google.com, lpieralisi@kernel.org,
kwilczynski@kernel.org, mani@kernel.org, jingoohan1@gmail.com
Cc: imx@lists.linux.dev, linuxppc-dev@lists.ozlabs.org,
linux-amlogic@lists.infradead.org,
linux-rockchip@lists.infradead.org,
linux-arm-msm@vger.kernel.org, sophgo@lists.linux.dev,
linux-riscv@lists.infradead.org, spacemit@lists.linux.dev,
linux-tegra@vger.kernel.org, linux-pci@vger.kernel.org,
linux-kernel@vger.kernel.org, Hans Zhang <18255117159@163.com>
Subject: [PATCH v3 16/16] PCI: dwc: ultrarisc: Use cached PCIe capability offset
Date: Mon, 20 Jul 2026 23:06:19 +0800 [thread overview]
Message-ID: <20260720150619.24733-17-18255117159@163.com> (raw)
In-Reply-To: <20260720150619.24733-1-18255117159@163.com>
Inside .init we call dw_pcie_get_pcie_cap() to obtain the offset, because
the core has not yet cached it. Hardware is already enabled by the driver
before this point.
Signed-off-by: Hans Zhang <18255117159@163.com>
---
In pcie-ultrarisc, the call chain is:
static const struct dw_pcie_host_ops ultrarisc_pcie_host_ops = {
.init = ultrarisc_pcie_host_init,
};
ultrarisc_pcie_host_init()
-> dw_pcie_find_capability()
---
drivers/pci/controller/dwc/pcie-ultrarisc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/controller/dwc/pcie-ultrarisc.c b/drivers/pci/controller/dwc/pcie-ultrarisc.c
index 6ee661ceff67..3f6e3ab0aa69 100644
--- a/drivers/pci/controller/dwc/pcie-ultrarisc.c
+++ b/drivers/pci/controller/dwc/pcie-ultrarisc.c
@@ -49,7 +49,7 @@ static int ultrarisc_pcie_host_init(struct dw_pcie_rp *pp)
FIELD_MODIFY(PORT_FLT_SF_MASK, &val, PORT_FLT_SF_VAL_64);
dw_pcie_writel_dbi(pci, PCIE_TIMER_CTRL_MAX_FUNC_NUM, val);
- cap_exp = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
+ cap_exp = dw_pcie_get_pcie_cap(pci);
val = dw_pcie_readl_dbi(pci, cap_exp + PCI_EXP_LNKCTL2);
FIELD_MODIFY(PCI_EXP_LNKCTL2_TLS, &val, PCI_EXP_LNKCTL2_TLS_16_0GT);
dw_pcie_writel_dbi(pci, cap_exp + PCI_EXP_LNKCTL2, val);
--
2.34.1
prev parent reply other threads:[~2026-07-20 15:12 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-20 15:06 [PATCH v3 00/16] PCI: dwc: Cache PCIe capability offset and simplify drivers Hans Zhang
2026-07-20 15:06 ` [PATCH v3 01/16] PCI: dwc: Add pcie_cap field and helper in designware header Hans Zhang
2026-07-20 15:06 ` [PATCH v3 02/16] PCI: dwc: Use cached PCIe capability offset in core Hans Zhang
2026-07-20 15:06 ` [PATCH v3 03/16] PCI: dwc: imx6: Use cached PCIe capability offset Hans Zhang
2026-07-20 15:06 ` [PATCH v3 04/16] PCI: dwc: layerscape-ep: " Hans Zhang
2026-07-20 15:06 ` [PATCH v3 05/16] PCI: dwc: meson: " Hans Zhang
2026-07-20 15:06 ` [PATCH v3 06/16] PCI: dwc: rockchip: " Hans Zhang
2026-07-20 15:06 ` [PATCH v3 07/16] PCI: dwc: eswin: " Hans Zhang
2026-07-20 15:06 ` [PATCH v3 08/16] PCI: dwc: fu740: " Hans Zhang
2026-07-20 15:06 ` [PATCH v3 09/16] PCI: dwc: intel-gw: " Hans Zhang
2026-07-20 15:06 ` [PATCH v3 10/16] PCI: dwc: qcom-ep: " Hans Zhang
2026-07-20 15:06 ` [PATCH v3 11/16] PCI: dwc: qcom: " Hans Zhang
2026-07-20 15:06 ` [PATCH v3 12/16] PCI: dwc: sophgo: " Hans Zhang
2026-07-20 15:06 ` [PATCH v3 13/16] PCI: dwc: spacemit-k1: " Hans Zhang
2026-07-20 15:06 ` [PATCH v3 14/16] PCI: dwc: spear13xx: " Hans Zhang
2026-07-20 15:06 ` [PATCH v3 15/16] PCI: dwc: tegra194: " Hans Zhang
2026-07-20 15:06 ` Hans Zhang [this message]
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