From: Niklas Cassel <niklas.cassel@axis.com>
To: Jingoo Han <jingoohan1@gmail.com>,
Joao Pinto <Joao.Pinto@synopsys.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Bjorn Helgaas <bhelgaas@google.com>
Cc: Niklas Cassel <niklass@axis.com>,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v5 02/18] PCI: designware-ep: dw_pcie_ep_set_msi() should only set MMC bits
Date: Mon, 20 Nov 2017 14:32:05 +0100 [thread overview]
Message-ID: <20171120133222.27771-3-niklas.cassel@axis.com> (raw)
In-Reply-To: <20171120133222.27771-1-niklas.cassel@axis.com>
Previously, dw_pcie_ep_set_msi() wrote all bits in the Message Control
register, thus overwriting the PCI_MSI_FLAGS_64BIT bit.
By clearing the PCI_MSI_FLAGS_64BIT bit, we break MSI
on systems where the RC has set a 64 bit MSI address.
Fix dw_pcie_ep_set_msi() so that it only sets MMC bits.
Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
---
drivers/pci/dwc/pcie-designware-ep.c | 4 +++-
drivers/pci/dwc/pcie-designware.h | 1 +
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/dwc/pcie-designware-ep.c b/drivers/pci/dwc/pcie-designware-ep.c
index d53d5f168363..c92ab87fd660 100644
--- a/drivers/pci/dwc/pcie-designware-ep.c
+++ b/drivers/pci/dwc/pcie-designware-ep.c
@@ -220,7 +220,9 @@ static int dw_pcie_ep_set_msi(struct pci_epc *epc, u8 encode_int)
struct dw_pcie_ep *ep = epc_get_drvdata(epc);
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
- val = (encode_int << MSI_CAP_MMC_SHIFT);
+ val = dw_pcie_readw_dbi(pci, MSI_MESSAGE_CONTROL);
+ val &= ~MSI_CAP_MMC_MASK;
+ val |= (encode_int << MSI_CAP_MMC_SHIFT) & MSI_CAP_MMC_MASK;
dw_pcie_writew_dbi(pci, MSI_MESSAGE_CONTROL, val);
return 0;
diff --git a/drivers/pci/dwc/pcie-designware.h b/drivers/pci/dwc/pcie-designware.h
index ecdede68522a..9aaf0cd04dd6 100644
--- a/drivers/pci/dwc/pcie-designware.h
+++ b/drivers/pci/dwc/pcie-designware.h
@@ -101,6 +101,7 @@
#define MSI_MESSAGE_CONTROL 0x52
#define MSI_CAP_MMC_SHIFT 1
+#define MSI_CAP_MMC_MASK (7 << MSI_CAP_MMC_SHIFT)
#define MSI_CAP_MME_SHIFT 4
#define MSI_CAP_MME_MASK (7 << MSI_CAP_MME_SHIFT)
#define MSI_MESSAGE_ADDR_L32 0x54
--
2.14.2
next prev parent reply other threads:[~2017-11-20 13:32 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-20 13:32 [PATCH v5 00/18] dwc MSI fixes, ARTPEC-6 EP mode support, ARTPEC-7 SoC support Niklas Cassel
2017-11-20 13:32 ` [PATCH v5 01/18] PCI: dwc: Use the DMA-API to get the MSI address Niklas Cassel
2017-11-30 15:28 ` Lorenzo Pieralisi
2017-12-13 13:59 ` Niklas Cassel
2017-12-13 14:31 ` Lorenzo Pieralisi
2017-12-13 17:21 ` Joao Pinto
2017-12-14 12:16 ` Gustavo Pimentel
2017-12-14 12:22 ` Lorenzo Pieralisi
2017-12-14 12:38 ` Gustavo Pimentel
2017-12-18 15:57 ` Lorenzo Pieralisi
2017-12-18 16:11 ` Gustavo Pimentel
[not found] ` <95866c7e-5177-69d6-ac64-1ba7f8b3e36d@synopsys.com>
2017-12-19 14:10 ` Lorenzo Pieralisi
2017-12-19 23:55 ` Niklas Cassel
2017-12-19 10:19 ` Lorenzo Pieralisi
2017-12-19 22:13 ` Niklas Cassel
2017-11-20 13:32 ` Niklas Cassel [this message]
2017-11-20 13:32 ` [PATCH v5 03/18] PCI: designware-ep: Read-only registers need DBI_RO_WR_EN to be writable Niklas Cassel
2017-11-20 13:32 ` [PATCH v5 04/18] PCI: designware-ep: Pre-allocate memory for MSI in dw_pcie_ep_init Niklas Cassel
2017-11-20 13:32 ` [PATCH v5 05/18] PCI: designware-ep: Remove static keyword from dw_pcie_ep_reset_bar() Niklas Cassel
2017-11-20 13:32 ` [PATCH v5 06/18] PCI: designware-ep: Add generic function for raising MSI irq Niklas Cassel
2017-11-20 13:32 ` [PATCH v5 07/18] PCI: dwc: dra7xx: Refactor Kconfig and Makefile handling for host/ep mode Niklas Cassel
2017-11-20 13:32 ` [PATCH v5 08/18] PCI: dwc: dra7xx: Assign pp->ops in dra7xx_add_pcie_port() rather than in probe Niklas Cassel
2017-11-20 13:32 ` [PATCH v5 09/18] PCI: dwc: dra7xx: Help compiler to remove unused code Niklas Cassel
2017-11-20 13:32 ` [PATCH v5 10/18] PCI: dwc: artpec6: Remove unused defines Niklas Cassel
2017-11-20 13:32 ` [PATCH v5 11/18] PCI: dwc: artpec6: Use BIT and GENMASK macros Niklas Cassel
2017-11-20 13:32 ` [PATCH v5 12/18] PCI: dwc: artpec6: Split artpec6_pcie_establish_link() into smaller functions Niklas Cassel
2017-11-20 13:32 ` [PATCH v5 13/18] bindings: PCI: artpec: Add support for endpoint mode Niklas Cassel
2017-11-20 13:32 ` [PATCH v5 14/18] PCI: dwc: artpec6: " Niklas Cassel
2017-11-20 13:32 ` [PATCH v5 15/18] PCI: dwc: Make cpu_addr_fixup take struct dw_pcie as argument Niklas Cassel
2017-12-18 18:10 ` Lorenzo Pieralisi
2017-12-18 21:15 ` Niklas Cassel
2017-12-19 10:48 ` Lorenzo Pieralisi
2017-11-20 13:32 ` [PATCH v5 16/18] PCI: dwc: artpec6: Deassert the core before waiting for PHY Niklas Cassel
2017-11-20 13:32 ` [PATCH v5 17/18] bindings: PCI: artpec: Add support for the ARTPEC-7 SoC Niklas Cassel
2017-11-20 13:32 ` [PATCH v5 18/18] PCI: dwc: artpec6: " Niklas Cassel
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