From: Kishon Vijay Abraham I <kishon@ti.com>
To: Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Rob Herring <robh+dt@kernel.org>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Arnd Bergmann <arnd@arndb.de>,
Murali Karicheri <m-karicheri2@ti.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>,
Jingoo Han <jingoohan1@gmail.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-pci@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-arm-kernel@axis.com
Subject: [PATCH v2 24/26] PCI: designware-ep: Use aligned ATU window for raising MSI interrupts
Date: Mon, 25 Mar 2019 14:04:59 +0530 [thread overview]
Message-ID: <20190325083501.8088-25-kishon@ti.com> (raw)
In-Reply-To: <20190325083501.8088-1-kishon@ti.com>
Certain platforms like K2G reguires the outbound ATU window to be
aligned. The alignment size is already present in mem->page_size.
Use the alignment size present in mem->page_size to configre a
aligned ATU window. In order to raise an interrupt, CPU has to write
to address offset from the start of the window unlike before where
writes were always to the beginning of the ATU window.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/pci/controller/dwc/pcie-designware-ep.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
index 0c208b9bda43..2bf5a35c0570 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -397,6 +397,7 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
{
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
struct pci_epc *epc = ep->epc;
+ unsigned int aligned_offset;
u16 msg_ctrl, msg_data;
u32 msg_addr_lower, msg_addr_upper, reg;
u64 msg_addr;
@@ -422,13 +423,15 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
reg = ep->msi_cap + PCI_MSI_DATA_32;
msg_data = dw_pcie_readw_dbi(pci, reg);
}
- msg_addr = ((u64) msg_addr_upper) << 32 | msg_addr_lower;
+ aligned_offset = msg_addr_lower & (epc->mem->page_size - 1);
+ msg_addr = ((u64)msg_addr_upper) << 32 |
+ (msg_addr_lower & ~aligned_offset);
ret = dw_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys, msg_addr,
epc->mem->page_size);
if (ret)
return ret;
- writel(msg_data | (interrupt_num - 1), ep->msi_mem);
+ writel(msg_data | (interrupt_num - 1), ep->msi_mem + aligned_offset);
dw_pcie_ep_unmap_addr(epc, func_no, ep->msi_mem_phys);
--
2.17.1
next prev parent reply other threads:[~2019-03-25 8:34 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-25 8:34 [PATCH v2 00/26] Add support for PCIe RC and EP mode in TI's AM654 SoC Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 01/26] PCI: keystone: Add start_link/stop_link dw_pcie_ops Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 02/26] PCI: keystone: Cleanup error_irq configuration Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 03/26] dt-bindings: PCI: keystone: Add "reg-names" binding information Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 04/26] PCI: keystone: Perform host initialization in a single function Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 05/26] PCI: keystone: Use platform_get_resource_byname to get memory resources Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 06/26] PCI: keystone: Move initializations to appropriate places Kishon Vijay Abraham I
2019-04-13 14:30 ` Bjorn Helgaas
2019-04-15 5:34 ` Kishon Vijay Abraham I
2019-04-15 12:25 ` Lorenzo Pieralisi
2019-03-25 8:34 ` [PATCH v2 07/26] dt-bindings: PCI: Add dt-binding to configure PCIe mode Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 08/26] PCI: keystone: Explicitly set the " Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 09/26] dt-bindings: PCI: Document "atu" reg-names Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 10/26] PCI: dwc: Enable iATU unroll for endpoint too Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 11/26] PCI: dwc: Fix ATU identification for designware version >= 4.80 Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 12/26] PCI: keystone: Prevent ARM32 specific code to be compiled for ARM64 Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 13/26] dt-bindings: PCI: Add PCI RC dt binding documentation for AM654 Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 14/26] PCI: keystone: Add support for PCIe RC in AM654x Platforms Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 15/26] PCI: keystone: Invoke phy_reset API before enabling PHY Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 16/26] PCI: OF: Allow of_pci_get_max_link_speed() to be used by PCI Endpoint drivers Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 17/26] PCI: keystone: Add support to set the max link speed from DT Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 18/26] PCI: endpoint: Add support to allocate aligned buffers to be mapped in BARs Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 19/26] PCI: dwc: Add const qualifier to struct dw_pcie_ep_ops Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 20/26] PCI: dwc: Fix dw_pcie_ep_find_capability to return correct capability offset Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 21/26] PCI: dwc: Add callbacks for accessing dbi2 address space Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 22/26] PCI: keystone: Add support for PCIe EP in AM654x Platforms Kishon Vijay Abraham I
2019-03-25 8:34 ` [PATCH v2 23/26] PCI: designware-ep: Configure RESBAR to advertise the smallest size Kishon Vijay Abraham I
2019-04-13 16:00 ` Bjorn Helgaas
2019-04-16 13:36 ` Lorenzo Pieralisi
2019-03-25 8:34 ` Kishon Vijay Abraham I [this message]
2019-03-25 8:35 ` [PATCH v2 25/26] misc: pci_endpoint_test: Add support to test PCI EP in AM654x Kishon Vijay Abraham I
2019-03-25 8:35 ` [PATCH v2 26/26] misc: pci_endpoint_test: Fix test_reg_bar to be updated in pci_endpoint_test Kishon Vijay Abraham I
2019-03-25 9:36 ` [PATCH v2 00/26] Add support for PCIe RC and EP mode in TI's AM654 SoC Kishon Vijay Abraham I
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