diff options
Diffstat (limited to 'target/linux/generic/pending-5.10/850-0018-PCI-aardvark-Use-separate-INTA-interrupt-for-emulate.patch')
| -rw-r--r-- | target/linux/generic/pending-5.10/850-0018-PCI-aardvark-Use-separate-INTA-interrupt-for-emulate.patch | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/target/linux/generic/pending-5.10/850-0018-PCI-aardvark-Use-separate-INTA-interrupt-for-emulate.patch b/target/linux/generic/pending-5.10/850-0018-PCI-aardvark-Use-separate-INTA-interrupt-for-emulate.patch deleted file mode 100644 index 62a4bfe807..0000000000 --- a/target/linux/generic/pending-5.10/850-0018-PCI-aardvark-Use-separate-INTA-interrupt-for-emulate.patch +++ /dev/null @@ -1,161 +0,0 @@ -From db305233136f5aa2444a8287a279384e8458c458 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> -Date: Thu, 1 Apr 2021 20:12:48 +0200 -Subject: [PATCH] PCI: aardvark: Use separate INTA interrupt for emulated root - bridge -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -Emulated root bridge currently provides only one Legacy INTA interrupt -which is used for reporting PCIe PME and ERR events and handled by kernel -PCIe PME and AER drivers. - -Aardvark HW reports these PME and ERR events separately, so there is no -need to mix real INTA interrupt and emulated INTA interrupt for PCIe PME -and AER drivers. - -Register a new advk-RP (as in Root Port) irq chip and a new irq domain -for emulated root bridge and use this new separate irq domain for -providing INTA interrupt from emulated root bridge for PME and ERR events. - -The real INTA interrupt from real devices is now separate. - -A custom map_irq callback function on PCI host bridge structure is used to -allocate IRQ mapping for emulated root bridge from new irq domain. Original -callback of_irq_parse_and_map_pci() is used for all other devices as before. - -Signed-off-by: Pali Rohár <pali@kernel.org> -Signed-off-by: Marek Behún <kabel@kernel.org> ---- - drivers/pci/controller/pci-aardvark.c | 69 ++++++++++++++++++++++++++- - 1 file changed, 67 insertions(+), 2 deletions(-) - ---- a/drivers/pci/controller/pci-aardvark.c -+++ b/drivers/pci/controller/pci-aardvark.c -@@ -280,6 +280,7 @@ struct advk_pcie { - } wins[OB_WIN_COUNT]; - u8 wins_count; - int irq; -+ struct irq_domain *rp_irq_domain; - struct irq_domain *irq_domain; - struct irq_chip irq_chip; - raw_spinlock_t irq_lock; -@@ -1443,6 +1444,44 @@ static void advk_pcie_remove_irq_domain( - irq_domain_remove(pcie->irq_domain); - } - -+static struct irq_chip advk_rp_irq_chip = { -+ .name = "advk-RP", -+}; -+ -+static int advk_pcie_rp_irq_map(struct irq_domain *h, -+ unsigned int virq, irq_hw_number_t hwirq) -+{ -+ struct advk_pcie *pcie = h->host_data; -+ -+ irq_set_chip_and_handler(virq, &advk_rp_irq_chip, handle_simple_irq); -+ irq_set_chip_data(virq, pcie); -+ -+ return 0; -+} -+ -+static const struct irq_domain_ops advk_pcie_rp_irq_domain_ops = { -+ .map = advk_pcie_rp_irq_map, -+ .xlate = irq_domain_xlate_onecell, -+}; -+ -+static int advk_pcie_init_rp_irq_domain(struct advk_pcie *pcie) -+{ -+ pcie->rp_irq_domain = irq_domain_add_linear(NULL, 1, -+ &advk_pcie_rp_irq_domain_ops, -+ pcie); -+ if (!pcie->rp_irq_domain) { -+ dev_err(&pcie->pdev->dev, "Failed to add Root Port IRQ domain\n"); -+ return -ENOMEM; -+ } -+ -+ return 0; -+} -+ -+static void advk_pcie_remove_rp_irq_domain(struct advk_pcie *pcie) -+{ -+ irq_domain_remove(pcie->rp_irq_domain); -+} -+ - static void advk_pcie_handle_pme(struct advk_pcie *pcie) - { - u32 requester = advk_readl(pcie, PCIE_MSG_LOG_REG) >> 16; -@@ -1465,7 +1504,7 @@ static void advk_pcie_handle_pme(struct - if (!(le16_to_cpu(pcie->bridge.pcie_conf.rootctl) & PCI_EXP_RTCTL_PMEIE)) - return; - -- virq = irq_find_mapping(pcie->irq_domain, 0); -+ virq = irq_find_mapping(pcie->rp_irq_domain, 0); - if (generic_handle_irq(virq) == -EINVAL) - dev_err_ratelimited(&pcie->pdev->dev, "unhandled PME IRQ\n"); - } -@@ -1519,7 +1558,7 @@ static void advk_pcie_handle_int(struct - * Aardvark HW returns zero for PCI_ERR_ROOT_AER_IRQ, so use - * PCIe interrupt 0 - */ -- virq = irq_find_mapping(pcie->irq_domain, 0); -+ virq = irq_find_mapping(pcie->rp_irq_domain, 0); - if (generic_handle_irq(virq) == -EINVAL) - dev_err_ratelimited(&pcie->pdev->dev, "unhandled ERR IRQ\n"); - } -@@ -1565,6 +1604,21 @@ static void advk_pcie_irq_handler(struct - chained_irq_exit(chip, desc); - } - -+static int advk_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) -+{ -+ struct advk_pcie *pcie = dev->bus->sysdata; -+ -+ /* -+ * Emulated root bridge has its own emulated irq chip and irq domain. -+ * Argument pin is the INTx pin (1=INTA, 2=INTB, 3=INTC, 4=INTD) and -+ * hwirq for irq_create_mapping() is indexed from zero. -+ */ -+ if (pci_is_root_bus(dev->bus)) -+ return irq_create_mapping(pcie->rp_irq_domain, pin - 1); -+ else -+ return of_irq_parse_and_map_pci(dev, slot, pin); -+} -+ - static void __maybe_unused advk_pcie_disable_phy(struct advk_pcie *pcie) - { - phy_power_off(pcie->phy); -@@ -1768,14 +1822,24 @@ static int advk_pcie_probe(struct platfo - return ret; - } - -+ ret = advk_pcie_init_rp_irq_domain(pcie); -+ if (ret) { -+ dev_err(dev, "Failed to initialize irq\n"); -+ advk_pcie_remove_msi_irq_domain(pcie); -+ advk_pcie_remove_irq_domain(pcie); -+ return ret; -+ } -+ - irq_set_chained_handler_and_data(pcie->irq, advk_pcie_irq_handler, pcie); - - bridge->sysdata = pcie; - bridge->ops = &advk_pcie_ops; -+ bridge->map_irq = advk_pcie_map_irq; - - ret = pci_host_probe(bridge); - if (ret < 0) { - irq_set_chained_handler_and_data(pcie->irq, NULL, NULL); -+ advk_pcie_remove_rp_irq_domain(pcie); - advk_pcie_remove_msi_irq_domain(pcie); - advk_pcie_remove_irq_domain(pcie); - return ret; -@@ -1827,6 +1891,7 @@ static int advk_pcie_remove(struct platf - irq_set_chained_handler_and_data(pcie->irq, NULL, NULL); - - /* Remove IRQ domains */ -+ advk_pcie_remove_rp_irq_domain(pcie); - advk_pcie_remove_msi_irq_domain(pcie); - advk_pcie_remove_irq_domain(pcie); - |