diff options
Diffstat (limited to 'target/linux/generic/pending-5.10/850-0011-PCI-aardvark-Fix-setting-MSI-address.patch')
| -rw-r--r-- | target/linux/generic/pending-5.10/850-0011-PCI-aardvark-Fix-setting-MSI-address.patch | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/target/linux/generic/pending-5.10/850-0011-PCI-aardvark-Fix-setting-MSI-address.patch b/target/linux/generic/pending-5.10/850-0011-PCI-aardvark-Fix-setting-MSI-address.patch new file mode 100644 index 0000000000..083b93f420 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0011-PCI-aardvark-Fix-setting-MSI-address.patch @@ -0,0 +1,96 @@ +From fa73c200f181436eab859374657c53a73778d8ad Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Fri, 26 Mar 2021 17:35:44 +0100 +Subject: [PATCH] PCI: aardvark: Fix setting MSI address +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +MSI address for receiving MSI interrupts needs to be correctly set before +enabling processing of MSI interrupts. + +Move code for setting PCIE_MSI_ADDR_LOW_REG and PCIE_MSI_ADDR_HIGH_REG +from advk_pcie_init_msi_irq_domain() to advk_pcie_setup_hw(), before +enabling PCIE_CORE_CTRL2_MSI_ENABLE. + +After this we can remove the now unused member msi_msg, which was used +only for MSI doorbell address. MSI address can be any address which cannot +be used to DMA to. So change it to the address of the main struct advk_pcie. + +Fixes: 8c39d710363c ("PCI: aardvark: Add Aardvark PCI host controller driver") +Signed-off-by: Pali Rohár <pali@kernel.org> +Acked-by: Marc Zyngier <maz@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +Cc: stable@vger.kernel.org # f21a8b1b6837 ("PCI: aardvark: Move to MSI handling using generic MSI support") +--- + drivers/pci/controller/pci-aardvark.c | 21 +++++++++------------ + 1 file changed, 9 insertions(+), 12 deletions(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index 43db884c81a1..76a65c592b5c 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -284,7 +284,6 @@ struct advk_pcie { + raw_spinlock_t msi_irq_lock; + DECLARE_BITMAP(msi_used, MSI_IRQ_NUM); + struct mutex msi_used_lock; +- u16 msi_msg; + int link_gen; + struct pci_bridge_emul bridge; + struct gpio_desc *reset_gpio; +@@ -479,6 +478,7 @@ static void advk_pcie_disable_ob_win(struct advk_pcie *pcie, u8 win_num) + + static void advk_pcie_setup_hw(struct advk_pcie *pcie) + { ++ phys_addr_t msi_addr; + u32 reg; + int i; + +@@ -567,6 +567,11 @@ static void advk_pcie_setup_hw(struct advk_pcie *pcie) + reg |= LANE_COUNT_1; + advk_writel(pcie, reg, PCIE_CORE_CTRL0_REG); + ++ /* Set MSI address */ ++ msi_addr = virt_to_phys(pcie); ++ advk_writel(pcie, lower_32_bits(msi_addr), PCIE_MSI_ADDR_LOW_REG); ++ advk_writel(pcie, upper_32_bits(msi_addr), PCIE_MSI_ADDR_HIGH_REG); ++ + /* Enable MSI */ + reg = advk_readl(pcie, PCIE_CORE_CTRL2_REG); + reg |= PCIE_CORE_CTRL2_MSI_ENABLE; +@@ -1182,10 +1187,10 @@ static void advk_msi_irq_compose_msi_msg(struct irq_data *data, + struct msi_msg *msg) + { + struct advk_pcie *pcie = irq_data_get_irq_chip_data(data); +- phys_addr_t msi_msg = virt_to_phys(&pcie->msi_msg); ++ phys_addr_t msi_addr = virt_to_phys(pcie); + +- msg->address_lo = lower_32_bits(msi_msg); +- msg->address_hi = upper_32_bits(msi_msg); ++ msg->address_lo = lower_32_bits(msi_addr); ++ msg->address_hi = upper_32_bits(msi_addr); + msg->data = data->hwirq; + } + +@@ -1344,18 +1349,10 @@ static struct msi_domain_info advk_msi_domain_info = { + static int advk_pcie_init_msi_irq_domain(struct advk_pcie *pcie) + { + struct device *dev = &pcie->pdev->dev; +- phys_addr_t msi_msg_phys; + + raw_spin_lock_init(&pcie->msi_irq_lock); + mutex_init(&pcie->msi_used_lock); + +- msi_msg_phys = virt_to_phys(&pcie->msi_msg); +- +- advk_writel(pcie, lower_32_bits(msi_msg_phys), +- PCIE_MSI_ADDR_LOW_REG); +- advk_writel(pcie, upper_32_bits(msi_msg_phys), +- PCIE_MSI_ADDR_HIGH_REG); +- + pcie->msi_inner_domain = + irq_domain_add_linear(NULL, MSI_IRQ_NUM, + &advk_msi_domain_ops, pcie); +-- +2.34.1 + |