From: Siddharth Vadapalli <s-vadapalli@ti.com>
To: <lpieralisi@kernel.org>, <kw@linux.com>, <robh@kernel.org>,
<bhelgaas@google.com>, <manivannan.sadhasivam@linaro.org>,
<fancer.lancer@gmail.com>, <u.kleine-koenig@pengutronix.de>,
<cassel@kernel.org>, <dlemoal@kernel.org>,
<yoshihiro.shimoda.uh@renesas.com>
Cc: <linux-pci@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>, <srk@ti.com>,
<s-vadapalli@ti.com>
Subject: [PATCH v7 2/2] PCI: keystone: Fix pci_ops for AM654x SoC
Date: Thu, 28 Mar 2024 14:20:41 +0530 [thread overview]
Message-ID: <20240328085041.2916899-3-s-vadapalli@ti.com> (raw)
In-Reply-To: <20240328085041.2916899-1-s-vadapalli@ti.com>
In the process of converting .scan_bus() callbacks to .add_bus(), the
ks_pcie_v3_65_scan_bus() function was changed to ks_pcie_v3_65_add_bus().
The .scan_bus() method belonged to ks_pcie_host_ops which was specific
to controller version 3.65a, while the .add_bus() method had been added
to ks_pcie_ops which is shared between the controller versions 3.65a and
4.90a. Neither the older ks_pcie_v3_65_scan_bus() method, nor the newer
ks_pcie_v3_65_add_bus() method is applicable to the controller version
4.90a which is present in AM654x SoCs.
Thus, as a fix, remove "ks_pcie_v3_65_add_bus()" and move its contents
to the .msi_init callback "ks_pcie_msi_host_init()" which is specific to
the 3.65a controller.
Fixes: 6ab15b5e7057 ("PCI: dwc: keystone: Convert .scan_bus() callback to use add_bus")
Suggested-by: Serge Semin <fancer.lancer@gmail.com>
Suggested-by: Bjorn Helgaas <helgaas@kernel.org>
Suggested-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
---
drivers/pci/controller/dwc/pci-keystone.c | 52 ++++++++---------------
1 file changed, 18 insertions(+), 34 deletions(-)
diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index 5c073e520628..6cb3a4713009 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -289,6 +289,24 @@ static void ks_pcie_clear_dbi_mode(struct keystone_pcie *ks_pcie)
static int ks_pcie_msi_host_init(struct dw_pcie_rp *pp)
{
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct keystone_pcie *ks_pcie = to_keystone_pcie(pci);
+
+ /* Configure and set up BAR0 */
+ ks_pcie_set_dbi_mode(ks_pcie);
+
+ /* Enable BAR0 */
+ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 1);
+ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, SZ_4K - 1);
+
+ ks_pcie_clear_dbi_mode(ks_pcie);
+
+ /*
+ * For BAR0, just setting bus address for inbound writes (MSI) should
+ * be sufficient. Use physical address to avoid any conflicts.
+ */
+ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, ks_pcie->app.start);
+
pp->msi_irq_chip = &ks_pcie_msi_irq_chip;
return dw_pcie_allocate_domains(pp);
}
@@ -445,44 +463,10 @@ static struct pci_ops ks_child_pcie_ops = {
.write = pci_generic_config_write,
};
-/**
- * ks_pcie_v3_65_add_bus() - keystone add_bus post initialization
- * @bus: A pointer to the PCI bus structure.
- *
- * This sets BAR0 to enable inbound access for MSI_IRQ register
- */
-static int ks_pcie_v3_65_add_bus(struct pci_bus *bus)
-{
- struct dw_pcie_rp *pp = bus->sysdata;
- struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- struct keystone_pcie *ks_pcie = to_keystone_pcie(pci);
-
- if (!pci_is_root_bus(bus))
- return 0;
-
- /* Configure and set up BAR0 */
- ks_pcie_set_dbi_mode(ks_pcie);
-
- /* Enable BAR0 */
- dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 1);
- dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, SZ_4K - 1);
-
- ks_pcie_clear_dbi_mode(ks_pcie);
-
- /*
- * For BAR0, just setting bus address for inbound writes (MSI) should
- * be sufficient. Use physical address to avoid any conflicts.
- */
- dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, ks_pcie->app.start);
-
- return 0;
-}
-
static struct pci_ops ks_pcie_ops = {
.map_bus = dw_pcie_own_conf_map_bus,
.read = pci_generic_config_read,
.write = pci_generic_config_write,
- .add_bus = ks_pcie_v3_65_add_bus,
};
/**
--
2.40.1
prev parent reply other threads:[~2024-03-28 8:51 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-28 8:50 [PATCH v7 0/2] PCI: keystone: Fix pci_ops for AM654x SoC Siddharth Vadapalli
2024-03-28 8:50 ` [PATCH v7 1/2] PCI: keystone: Relocate ks_pcie_set/clear_dbi_mode() Siddharth Vadapalli
2024-03-28 8:50 ` Siddharth Vadapalli [this message]
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