diff options
23 files changed, 1725 insertions, 0 deletions
diff --git a/target/linux/generic/pending-5.10/850-0001-PCI-aardvark-Replace-custom-PCIE_CORE_INT_-macros-wi.patch b/target/linux/generic/pending-5.10/850-0001-PCI-aardvark-Replace-custom-PCIE_CORE_INT_-macros-wi.patch new file mode 100644 index 0000000000..c63d016c35 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0001-PCI-aardvark-Replace-custom-PCIE_CORE_INT_-macros-wi.patch @@ -0,0 +1,45 @@ +From 43f3f187e6f62ca40802afe39495c8a3e20b4bfa Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Mon, 10 Jan 2022 01:50:50 +0100 +Subject: [PATCH] PCI: aardvark: Replace custom PCIE_CORE_INT_* macros with + PCI_INTERRUPT_* +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Header file linux/pci.h defines enum pci_interrupt_pin with corresponding +PCI_INTERRUPT_* values. + +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 6 +----- + 1 file changed, 1 insertion(+), 5 deletions(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index 226bce2f98f6..a573fc1aa4dd 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -37,10 +37,6 @@ + #define PCIE_CORE_ERR_CAPCTL_ECRC_CHK_TX_EN BIT(6) + #define PCIE_CORE_ERR_CAPCTL_ECRC_CHCK BIT(7) + #define PCIE_CORE_ERR_CAPCTL_ECRC_CHCK_RCV BIT(8) +-#define PCIE_CORE_INT_A_ASSERT_ENABLE 1 +-#define PCIE_CORE_INT_B_ASSERT_ENABLE 2 +-#define PCIE_CORE_INT_C_ASSERT_ENABLE 3 +-#define PCIE_CORE_INT_D_ASSERT_ENABLE 4 + /* PIO registers base address and register offsets */ + #define PIO_BASE_ADDR 0x4000 + #define PIO_CTRL (PIO_BASE_ADDR + 0x0) +@@ -967,7 +963,7 @@ static int advk_sw_pci_bridge_init(struct advk_pcie *pcie) + bridge->conf.pref_mem_limit = cpu_to_le16(PCI_PREF_RANGE_TYPE_64); + + /* Support interrupt A for MSI feature */ +- bridge->conf.intpin = PCIE_CORE_INT_A_ASSERT_ENABLE; ++ bridge->conf.intpin = PCI_INTERRUPT_INTA; + + /* Indicates supports for Completion Retry Status */ + bridge->pcie_conf.rootcap = cpu_to_le16(PCI_EXP_RTCAP_CRSVIS); +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0002-PCI-aardvark-Fix-reading-MSI-interrupt-number.patch b/target/linux/generic/pending-5.10/850-0002-PCI-aardvark-Fix-reading-MSI-interrupt-number.patch new file mode 100644 index 0000000000..25922eeb0a --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0002-PCI-aardvark-Fix-reading-MSI-interrupt-number.patch @@ -0,0 +1,62 @@ +From a29a7d01cd778854e08108461cba321a63d98871 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Fri, 2 Jul 2021 16:39:47 +0200 +Subject: [PATCH] PCI: aardvark: Fix reading MSI interrupt number +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +In advk_pcie_handle_msi() the authors expect that when bit i in the W1C +register PCIE_MSI_STATUS_REG is cleared, the PCIE_MSI_PAYLOAD_REG is +updated to contain the MSI number corresponding to index i. + +Experiments show that this is not so, and instead PCIE_MSI_PAYLOAD_REG +always contains the number of the last received MSI, overall. + +Do not read PCIE_MSI_PAYLOAD_REG register for determining MSI interrupt +number. Since Aardvark already forbids more than 32 interrupts and uses +own allocated hwirq numbers, the msi_idx already corresponds to the +received MSI number. + +Fixes: 8c39d710363c ("PCI: aardvark: Add Aardvark PCI host controller driver") +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 13 ++++++------- + 1 file changed, 6 insertions(+), 7 deletions(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index a573fc1aa4dd..1c6980a78975 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -1391,7 +1391,7 @@ static void advk_pcie_remove_irq_domain(struct advk_pcie *pcie) + static void advk_pcie_handle_msi(struct advk_pcie *pcie) + { + u32 msi_val, msi_mask, msi_status, msi_idx; +- u16 msi_data; ++ int virq; + + msi_mask = advk_readl(pcie, PCIE_MSI_MASK_REG); + msi_val = advk_readl(pcie, PCIE_MSI_STATUS_REG); +@@ -1401,13 +1401,12 @@ static void advk_pcie_handle_msi(struct advk_pcie *pcie) + if (!(BIT(msi_idx) & msi_status)) + continue; + +- /* +- * msi_idx contains bits [4:0] of the msi_data and msi_data +- * contains 16bit MSI interrupt number +- */ + advk_writel(pcie, BIT(msi_idx), PCIE_MSI_STATUS_REG); +- msi_data = advk_readl(pcie, PCIE_MSI_PAYLOAD_REG) & PCIE_MSI_DATA_MASK; +- generic_handle_irq(msi_data); ++ virq = irq_find_mapping(pcie->msi_inner_domain, msi_idx); ++ if (virq) ++ generic_handle_irq(virq); ++ else ++ dev_err_ratelimited(&pcie->pdev->dev, "unexpected MSI 0x%02x\n", msi_idx); + } + + advk_writel(pcie, PCIE_ISR0_MSI_INT_PENDING, +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0003-PCI-aardvark-Fix-support-for-MSI-interrupts.patch b/target/linux/generic/pending-5.10/850-0003-PCI-aardvark-Fix-support-for-MSI-interrupts.patch new file mode 100644 index 0000000000..1735399dc1 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0003-PCI-aardvark-Fix-support-for-MSI-interrupts.patch @@ -0,0 +1,77 @@ +From bb03b126ea6c9e57177b537dd022246fa5dbef16 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Fri, 12 Feb 2021 16:24:07 +0100 +Subject: [PATCH] PCI: aardvark: Fix support for MSI interrupts +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Aardvark hardware supports Multi-MSI and MSI_FLAG_MULTI_PCI_MSI is already +set for the MSI chip. But when allocating MSI interrupt numbers for +Multi-MSI, the numbers need to be properly aligned, otherwise endpoint +devices send MSI interrupt with incorrect numbers. + +Fix this issue by using function bitmap_find_free_region() instead of +bitmap_find_next_zero_area(). + +To ensure that aligned MSI interrupt numbers are used by endpoint devices, +we cannot use Linux virtual irq numbers (as they are random and not +properly aligned). Instead we need to use the aligned hwirq numbers. + +This change fixes receiving MSI interrupts on Armada 3720 boards and +allows using NVMe disks which use Multi-MSI feature with 3 interrupts. + +Without this NVMe disks freeze booting as linux nvme-core.c is waiting +60s for an interrupt. + +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 16 ++++++---------- + 1 file changed, 6 insertions(+), 10 deletions(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index 1c6980a78975..e68773527171 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -1187,7 +1187,7 @@ static void advk_msi_irq_compose_msi_msg(struct irq_data *data, + + msg->address_lo = lower_32_bits(msi_msg); + msg->address_hi = upper_32_bits(msi_msg); +- msg->data = data->irq; ++ msg->data = data->hwirq; + } + + static int advk_msi_set_affinity(struct irq_data *irq_data, +@@ -1204,15 +1204,11 @@ static int advk_msi_irq_domain_alloc(struct irq_domain *domain, + int hwirq, i; + + mutex_lock(&pcie->msi_used_lock); +- hwirq = bitmap_find_next_zero_area(pcie->msi_used, MSI_IRQ_NUM, +- 0, nr_irqs, 0); +- if (hwirq >= MSI_IRQ_NUM) { +- mutex_unlock(&pcie->msi_used_lock); +- return -ENOSPC; +- } +- +- bitmap_set(pcie->msi_used, hwirq, nr_irqs); ++ hwirq = bitmap_find_free_region(pcie->msi_used, MSI_IRQ_NUM, ++ order_base_2(nr_irqs)); + mutex_unlock(&pcie->msi_used_lock); ++ if (hwirq < 0) ++ return -ENOSPC; + + for (i = 0; i < nr_irqs; i++) + irq_domain_set_info(domain, virq + i, hwirq + i, +@@ -1230,7 +1226,7 @@ static void advk_msi_irq_domain_free(struct irq_domain *domain, + struct advk_pcie *pcie = domain->host_data; + + mutex_lock(&pcie->msi_used_lock); +- bitmap_clear(pcie->msi_used, d->hwirq, nr_irqs); ++ bitmap_release_region(pcie->msi_used, d->hwirq, order_base_2(nr_irqs)); + mutex_unlock(&pcie->msi_used_lock); + } + +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0004-PCI-aardvark-Rewrite-IRQ-code-to-chained-IRQ-handler.patch b/target/linux/generic/pending-5.10/850-0004-PCI-aardvark-Rewrite-IRQ-code-to-chained-IRQ-handler.patch new file mode 100644 index 0000000000..fbed9cc506 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0004-PCI-aardvark-Rewrite-IRQ-code-to-chained-IRQ-handler.patch @@ -0,0 +1,130 @@ +From 0cd5141d1866afb23286fe90cd846441fe7aeb39 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Sat, 27 Mar 2021 14:44:11 +0100 +Subject: [PATCH] PCI: aardvark: Rewrite IRQ code to chained IRQ handler +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Rewrite the code to use irq_set_chained_handler_and_data() handler with +chained_irq_enter() and chained_irq_exit() processing instead of using +devm_request_irq(). + +advk_pcie_irq_handler() reads IRQ status bits and calls other functions +based on which bits are set. These functions then read its own IRQ status +bits and calls other aardvark functions based on these bits. Finally +generic_handle_domain_irq() with translated linux IRQ numbers are called. + +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 48 +++++++++++++++------------ + 1 file changed, 26 insertions(+), 22 deletions(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index e68773527171..01dfe70d9c2c 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -275,6 +275,7 @@ struct advk_pcie { + u32 actions; + } wins[OB_WIN_COUNT]; + u8 wins_count; ++ int irq; + struct irq_domain *irq_domain; + struct irq_chip irq_chip; + raw_spinlock_t irq_lock; +@@ -1440,21 +1441,26 @@ static void advk_pcie_handle_int(struct advk_pcie *pcie) + } + } + +-static irqreturn_t advk_pcie_irq_handler(int irq, void *arg) ++static void advk_pcie_irq_handler(struct irq_desc *desc) + { +- struct advk_pcie *pcie = arg; +- u32 status; ++ struct advk_pcie *pcie = irq_desc_get_handler_data(desc); ++ struct irq_chip *chip = irq_desc_get_chip(desc); ++ u32 val, mask, status; + +- status = advk_readl(pcie, HOST_CTRL_INT_STATUS_REG); +- if (!(status & PCIE_IRQ_CORE_INT)) +- return IRQ_NONE; ++ chained_irq_enter(chip, desc); + +- advk_pcie_handle_int(pcie); ++ val = advk_readl(pcie, HOST_CTRL_INT_STATUS_REG); ++ mask = advk_readl(pcie, HOST_CTRL_INT_MASK_REG); ++ status = val & ((~mask) & PCIE_IRQ_ALL_MASK); + +- /* Clear interrupt */ +- advk_writel(pcie, PCIE_IRQ_CORE_INT, HOST_CTRL_INT_STATUS_REG); ++ if (status & PCIE_IRQ_CORE_INT) { ++ advk_pcie_handle_int(pcie); + +- return IRQ_HANDLED; ++ /* Clear interrupt */ ++ advk_writel(pcie, PCIE_IRQ_CORE_INT, HOST_CTRL_INT_STATUS_REG); ++ } ++ ++ chained_irq_exit(chip, desc); + } + + static void __maybe_unused advk_pcie_disable_phy(struct advk_pcie *pcie) +@@ -1521,7 +1527,7 @@ static int advk_pcie_probe(struct platform_device *pdev) + struct advk_pcie *pcie; + struct pci_host_bridge *bridge; + struct resource_entry *entry; +- int ret, irq; ++ int ret; + + bridge = devm_pci_alloc_host_bridge(dev, sizeof(struct advk_pcie)); + if (!bridge) +@@ -1609,17 +1615,9 @@ static int advk_pcie_probe(struct platform_device *pdev) + if (IS_ERR(pcie->base)) + return PTR_ERR(pcie->base); + +- irq = platform_get_irq(pdev, 0); +- if (irq < 0) +- return irq; +- +- ret = devm_request_irq(dev, irq, advk_pcie_irq_handler, +- IRQF_SHARED | IRQF_NO_THREAD, "advk-pcie", +- pcie); +- if (ret) { +- dev_err(dev, "Failed to register interrupt\n"); +- return ret; +- } ++ pcie->irq = platform_get_irq(pdev, 0); ++ if (pcie->irq < 0) ++ return pcie->irq; + + pcie->reset_gpio = devm_gpiod_get_from_of_node(dev, dev->of_node, + "reset-gpios", 0, +@@ -1668,11 +1666,14 @@ static int advk_pcie_probe(struct platform_device *pdev) + return ret; + } + ++ irq_set_chained_handler_and_data(pcie->irq, advk_pcie_irq_handler, pcie); ++ + bridge->sysdata = pcie; + bridge->ops = &advk_pcie_ops; + + ret = pci_host_probe(bridge); + if (ret < 0) { ++ irq_set_chained_handler_and_data(pcie->irq, NULL, NULL); + advk_pcie_remove_msi_irq_domain(pcie); + advk_pcie_remove_irq_domain(pcie); + return ret; +@@ -1720,6 +1721,9 @@ static int advk_pcie_remove(struct platform_device *pdev) + advk_writel(pcie, PCIE_ISR1_ALL_MASK, PCIE_ISR1_REG); + advk_writel(pcie, PCIE_IRQ_ALL_MASK, HOST_CTRL_INT_STATUS_REG); + ++ /* Remove IRQ handler */ ++ irq_set_chained_handler_and_data(pcie->irq, NULL, NULL); ++ + /* Remove IRQ domains */ + advk_pcie_remove_msi_irq_domain(pcie); + advk_pcie_remove_irq_domain(pcie); +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0005-PCI-aardvark-Check-return-value-of-generic_handle_do.patch b/target/linux/generic/pending-5.10/850-0005-PCI-aardvark-Check-return-value-of-generic_handle_do.patch new file mode 100644 index 0000000000..0428d30f08 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0005-PCI-aardvark-Check-return-value-of-generic_handle_do.patch @@ -0,0 +1,36 @@ +From 69c1f2c6f45a556361fd8e8d2d4eb20e2c8d3d95 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Thu, 18 Mar 2021 17:04:32 +0100 +Subject: [PATCH] PCI: aardvark: Check return value of + generic_handle_domain_irq() when processing INTx IRQ +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +It is possible that we receive spurious INTx interrupt. Check for the +return value of generic_handle_domain_irq() when processing INTx IRQ. + +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 4 +++- + 1 file changed, 3 insertions(+), 1 deletion(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index 01dfe70d9c2c..4be05b52d835 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -1437,7 +1437,9 @@ static void advk_pcie_handle_int(struct advk_pcie *pcie) + PCIE_ISR1_REG); + + virq = irq_find_mapping(pcie->irq_domain, i); +- generic_handle_irq(virq); ++ if (generic_handle_irq(virq) == -EINVAL) ++ dev_err_ratelimited(&pcie->pdev->dev, "unexpected INT%c IRQ\n", ++ (char)i + 'A'); + } + } + +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0006-PCI-aardvark-Make-MSI-irq_chip-structures-static-dri.patch b/target/linux/generic/pending-5.10/850-0006-PCI-aardvark-Make-MSI-irq_chip-structures-static-dri.patch new file mode 100644 index 0000000000..b7d4108893 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0006-PCI-aardvark-Make-MSI-irq_chip-structures-static-dri.patch @@ -0,0 +1,98 @@ +From 5eb36a6b9508da442aac80f4df23e3951bbfa7aa Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Marek=20Beh=C3=BAn?= <kabel@kernel.org> +Date: Mon, 10 Jan 2022 00:03:41 +0100 +Subject: [PATCH] PCI: aardvark: Make MSI irq_chip structures static driver + structures +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Marc Zyngier says [1] that we should use struct irq_chip as a global +static struct in the driver. Even though the structure currently +contains a dynamic member (parent_device), Marc says [2] that he plans +to kill it and make the structure completely static. + +Convert Aardvark's priv->msi_bottom_irq_chip and priv->msi_irq_chip to +static driver structure. + +[1] https://lore.kernel.org/linux-pci/877dbcvngf.wl-maz@kernel.org/ +[2] https://lore.kernel.org/linux-pci/874k6gvkhz.wl-maz@kernel.org/ + +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 26 ++++++++++++-------------- + 1 file changed, 12 insertions(+), 14 deletions(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index 4be05b52d835..c7bd6b123857 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -281,8 +281,6 @@ struct advk_pcie { + raw_spinlock_t irq_lock; + struct irq_domain *msi_domain; + struct irq_domain *msi_inner_domain; +- struct irq_chip msi_bottom_irq_chip; +- struct irq_chip msi_irq_chip; + struct msi_domain_info msi_domain_info; + DECLARE_BITMAP(msi_used, MSI_IRQ_NUM); + struct mutex msi_used_lock; +@@ -1197,6 +1195,12 @@ static int advk_msi_set_affinity(struct irq_data *irq_data, + return -EINVAL; + } + ++static struct irq_chip advk_msi_bottom_irq_chip = { ++ .name = "MSI", ++ .irq_compose_msi_msg = advk_msi_irq_compose_msi_msg, ++ .irq_set_affinity = advk_msi_set_affinity, ++}; ++ + static int advk_msi_irq_domain_alloc(struct irq_domain *domain, + unsigned int virq, + unsigned int nr_irqs, void *args) +@@ -1213,7 +1217,7 @@ static int advk_msi_irq_domain_alloc(struct irq_domain *domain, + + for (i = 0; i < nr_irqs; i++) + irq_domain_set_info(domain, virq + i, hwirq + i, +- &pcie->msi_bottom_irq_chip, ++ &advk_msi_bottom_irq_chip, + domain->host_data, handle_simple_irq, + NULL, NULL); + +@@ -1283,29 +1287,23 @@ static const struct irq_domain_ops advk_pcie_irq_domain_ops = { + .xlate = irq_domain_xlate_onecell, + }; + ++static struct irq_chip advk_msi_irq_chip = { ++ .name = "advk-MSI", ++}; ++ + static int advk_pcie_init_msi_irq_domain(struct advk_pcie *pcie) + { + struct device *dev = &pcie->pdev->dev; + struct device_node *node = dev->of_node; +- struct irq_chip *bottom_ic, *msi_ic; + struct msi_domain_info *msi_di; + phys_addr_t msi_msg_phys; + + mutex_init(&pcie->msi_used_lock); + +- bottom_ic = &pcie->msi_bottom_irq_chip; +- +- bottom_ic->name = "MSI"; +- bottom_ic->irq_compose_msi_msg = advk_msi_irq_compose_msi_msg; +- bottom_ic->irq_set_affinity = advk_msi_set_affinity; +- +- msi_ic = &pcie->msi_irq_chip; +- msi_ic->name = "advk-MSI"; +- + msi_di = &pcie->msi_domain_info; + msi_di->flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | + MSI_FLAG_MULTI_PCI_MSI; +- msi_di->chip = msi_ic; ++ msi_di->chip = &advk_msi_irq_chip; + + msi_msg_phys = virt_to_phys(&pcie->msi_msg); + +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0007-PCI-aardvark-Make-msi_domain_info-structure-a-static.patch b/target/linux/generic/pending-5.10/850-0007-PCI-aardvark-Make-msi_domain_info-structure-a-static.patch new file mode 100644 index 0000000000..e388bc2ea7 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0007-PCI-aardvark-Make-msi_domain_info-structure-a-static.patch @@ -0,0 +1,69 @@ +From c092ab8994f1f777054c0179a9deb40b87ee606f Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Marek=20Beh=C3=BAn?= <kabel@kernel.org> +Date: Mon, 10 Jan 2022 00:10:46 +0100 +Subject: [PATCH] PCI: aardvark: Make msi_domain_info structure a static driver + structure +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Make Aardvark's msi_domain_info structure into a private driver structure. +Domain info is same for every potential instatination of a controller. + +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 16 ++++++++-------- + 1 file changed, 8 insertions(+), 8 deletions(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index c7bd6b123857..b5e5c922ad0d 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -281,7 +281,6 @@ struct advk_pcie { + raw_spinlock_t irq_lock; + struct irq_domain *msi_domain; + struct irq_domain *msi_inner_domain; +- struct msi_domain_info msi_domain_info; + DECLARE_BITMAP(msi_used, MSI_IRQ_NUM); + struct mutex msi_used_lock; + u16 msi_msg; +@@ -1291,20 +1290,20 @@ static struct irq_chip advk_msi_irq_chip = { + .name = "advk-MSI", + }; + ++static struct msi_domain_info advk_msi_domain_info = { ++ .flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | ++ MSI_FLAG_MULTI_PCI_MSI, ++ .chip = &advk_msi_irq_chip, ++}; ++ + static int advk_pcie_init_msi_irq_domain(struct advk_pcie *pcie) + { + struct device *dev = &pcie->pdev->dev; + struct device_node *node = dev->of_node; +- struct msi_domain_info *msi_di; + phys_addr_t msi_msg_phys; + + mutex_init(&pcie->msi_used_lock); + +- msi_di = &pcie->msi_domain_info; +- msi_di->flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | +- MSI_FLAG_MULTI_PCI_MSI; +- msi_di->chip = &advk_msi_irq_chip; +- + msi_msg_phys = virt_to_phys(&pcie->msi_msg); + + advk_writel(pcie, lower_32_bits(msi_msg_phys), +@@ -1320,7 +1319,8 @@ static int advk_pcie_init_msi_irq_domain(struct advk_pcie *pcie) + + pcie->msi_domain = + pci_msi_create_irq_domain(of_node_to_fwnode(node), +- msi_di, pcie->msi_inner_domain); ++ &advk_msi_domain_info, ++ pcie->msi_inner_domain); + if (!pcie->msi_domain) { + irq_domain_remove(pcie->msi_inner_domain); + return -ENOMEM; +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0008-PCI-aardvark-Use-dev_fwnode-instead-of-of_node_to_fw.patch b/target/linux/generic/pending-5.10/850-0008-PCI-aardvark-Use-dev_fwnode-instead-of-of_node_to_fw.patch new file mode 100644 index 0000000000..baba1744c2 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0008-PCI-aardvark-Use-dev_fwnode-instead-of-of_node_to_fw.patch @@ -0,0 +1,45 @@ +From 59029739d42b439628e2f64f3d8f2db9be97deff Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Marek=20Beh=C3=BAn?= <kabel@kernel.org> +Date: Mon, 10 Jan 2022 00:15:17 +0100 +Subject: [PATCH] PCI: aardvark: Use dev_fwnode() instead of + of_node_to_fwnode(dev->of_node) +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Use simple + dev_fwnode(dev) +instead of + struct device_node *node = dev->of_node; + of_node_to_fwnode(node) +especially since the node variable is not used elsewhere in the function. + +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 3 +-- + 1 file changed, 1 insertion(+), 2 deletions(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index b5e5c922ad0d..e641ad566488 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -1299,7 +1299,6 @@ 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; +- struct device_node *node = dev->of_node; + phys_addr_t msi_msg_phys; + + mutex_init(&pcie->msi_used_lock); +@@ -1318,7 +1317,7 @@ static int advk_pcie_init_msi_irq_domain(struct advk_pcie *pcie) + return -ENOMEM; + + pcie->msi_domain = +- pci_msi_create_irq_domain(of_node_to_fwnode(node), ++ pci_msi_create_irq_domain(dev_fwnode(dev), + &advk_msi_domain_info, + pcie->msi_inner_domain); + if (!pcie->msi_domain) { +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0009-PCI-aardvark-Refactor-unmasking-summary-MSI-interrup.patch b/target/linux/generic/pending-5.10/850-0009-PCI-aardvark-Refactor-unmasking-summary-MSI-interrup.patch new file mode 100644 index 0000000000..8189f0b1f1 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0009-PCI-aardvark-Refactor-unmasking-summary-MSI-interrup.patch @@ -0,0 +1,49 @@ +From 98feaf97bc64fc640a6c5b1394cd18fc7cd7dac8 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Sun, 28 Mar 2021 14:34:49 +0200 +Subject: [PATCH] PCI: aardvark: Refactor unmasking summary MSI interrupt +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Refactor the masking of ISR0/1 Sources and unmasking of summary MSI interrupt +so that it corresponds to the comments: +- first mask all ISR0/1 +- then unmask all MSIs +- then unmask summary MSI interrupt + +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 10 ++++++---- + 1 file changed, 6 insertions(+), 4 deletions(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index e641ad566488..5c887772fa97 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -578,15 +578,17 @@ static void advk_pcie_setup_hw(struct advk_pcie *pcie) + advk_writel(pcie, PCIE_IRQ_ALL_MASK, HOST_CTRL_INT_STATUS_REG); + + /* Disable All ISR0/1 Sources */ +- reg = PCIE_ISR0_ALL_MASK; +- reg &= ~PCIE_ISR0_MSI_INT_PENDING; +- advk_writel(pcie, reg, PCIE_ISR0_MASK_REG); +- ++ advk_writel(pcie, PCIE_ISR0_ALL_MASK, PCIE_ISR0_MASK_REG); + advk_writel(pcie, PCIE_ISR1_ALL_MASK, PCIE_ISR1_MASK_REG); + + /* Unmask all MSIs */ + advk_writel(pcie, ~(u32)PCIE_MSI_ALL_MASK, PCIE_MSI_MASK_REG); + ++ /* Unmask summary MSI interrupt */ ++ reg = advk_readl(pcie, PCIE_ISR0_MASK_REG); ++ reg &= ~PCIE_ISR0_MSI_INT_PENDING; ++ advk_writel(pcie, reg, PCIE_ISR0_MASK_REG); ++ + /* Enable summary interrupt for GIC SPI source */ + reg = PCIE_IRQ_ALL_MASK & (~PCIE_IRQ_ENABLE_INTS_MASK); + advk_writel(pcie, reg, HOST_CTRL_INT_MASK_REG); +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0010-PCI-aardvark-Add-support-for-masking-MSI-interrupts.patch b/target/linux/generic/pending-5.10/850-0010-PCI-aardvark-Add-support-for-masking-MSI-interrupts.patch new file mode 100644 index 0000000000..cdd76eed1c --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0010-PCI-aardvark-Add-support-for-masking-MSI-interrupts.patch @@ -0,0 +1,122 @@ +From 7f353accca6e4a3222991c65b1a6801503973bd3 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Fri, 2 Jul 2021 16:44:10 +0200 +Subject: [PATCH] PCI: aardvark: Add support for masking MSI interrupts +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +We should not unmask MSIs at setup, but only when kernel asks for them +to be unmasked. + +At setup, mask all MSIs, and implement IRQ chip callbacks for masking +and unmasking particular MSIs. + +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 54 ++++++++++++++++++++++++--- + 1 file changed, 49 insertions(+), 5 deletions(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index 5c887772fa97..43db884c81a1 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -281,6 +281,7 @@ struct advk_pcie { + raw_spinlock_t irq_lock; + struct irq_domain *msi_domain; + struct irq_domain *msi_inner_domain; ++ raw_spinlock_t msi_irq_lock; + DECLARE_BITMAP(msi_used, MSI_IRQ_NUM); + struct mutex msi_used_lock; + u16 msi_msg; +@@ -577,12 +578,10 @@ static void advk_pcie_setup_hw(struct advk_pcie *pcie) + advk_writel(pcie, PCIE_ISR1_ALL_MASK, PCIE_ISR1_REG); + advk_writel(pcie, PCIE_IRQ_ALL_MASK, HOST_CTRL_INT_STATUS_REG); + +- /* Disable All ISR0/1 Sources */ ++ /* Disable All ISR0/1 and MSI Sources */ + advk_writel(pcie, PCIE_ISR0_ALL_MASK, PCIE_ISR0_MASK_REG); + advk_writel(pcie, PCIE_ISR1_ALL_MASK, PCIE_ISR1_MASK_REG); +- +- /* Unmask all MSIs */ +- advk_writel(pcie, ~(u32)PCIE_MSI_ALL_MASK, PCIE_MSI_MASK_REG); ++ advk_writel(pcie, PCIE_MSI_ALL_MASK, PCIE_MSI_MASK_REG); + + /* Unmask summary MSI interrupt */ + reg = advk_readl(pcie, PCIE_ISR0_MASK_REG); +@@ -1196,10 +1195,52 @@ static int advk_msi_set_affinity(struct irq_data *irq_data, + return -EINVAL; + } + ++static void advk_msi_irq_mask(struct irq_data *d) ++{ ++ struct advk_pcie *pcie = d->domain->host_data; ++ irq_hw_number_t hwirq = irqd_to_hwirq(d); ++ unsigned long flags; ++ u32 mask; ++ ++ raw_spin_lock_irqsave(&pcie->msi_irq_lock, flags); ++ mask = advk_readl(pcie, PCIE_MSI_MASK_REG); ++ mask |= BIT(hwirq); ++ advk_writel(pcie, mask, PCIE_MSI_MASK_REG); ++ raw_spin_unlock_irqrestore(&pcie->msi_irq_lock, flags); ++} ++ ++static void advk_msi_irq_unmask(struct irq_data *d) ++{ ++ struct advk_pcie *pcie = d->domain->host_data; ++ irq_hw_number_t hwirq = irqd_to_hwirq(d); ++ unsigned long flags; ++ u32 mask; ++ ++ raw_spin_lock_irqsave(&pcie->msi_irq_lock, flags); ++ mask = advk_readl(pcie, PCIE_MSI_MASK_REG); ++ mask &= ~BIT(hwirq); ++ advk_writel(pcie, mask, PCIE_MSI_MASK_REG); ++ raw_spin_unlock_irqrestore(&pcie->msi_irq_lock, flags); ++} ++ ++static void advk_msi_top_irq_mask(struct irq_data *d) ++{ ++ pci_msi_mask_irq(d); ++ irq_chip_mask_parent(d); ++} ++ ++static void advk_msi_top_irq_unmask(struct irq_data *d) ++{ ++ pci_msi_unmask_irq(d); ++ irq_chip_unmask_parent(d); ++} ++ + static struct irq_chip advk_msi_bottom_irq_chip = { + .name = "MSI", + .irq_compose_msi_msg = advk_msi_irq_compose_msi_msg, + .irq_set_affinity = advk_msi_set_affinity, ++ .irq_mask = advk_msi_irq_mask, ++ .irq_unmask = advk_msi_irq_unmask, + }; + + static int advk_msi_irq_domain_alloc(struct irq_domain *domain, +@@ -1289,7 +1330,9 @@ static const struct irq_domain_ops advk_pcie_irq_domain_ops = { + }; + + static struct irq_chip advk_msi_irq_chip = { +- .name = "advk-MSI", ++ .name = "advk-MSI", ++ .irq_mask = advk_msi_top_irq_mask, ++ .irq_unmask = advk_msi_top_irq_unmask, + }; + + static struct msi_domain_info advk_msi_domain_info = { +@@ -1303,6 +1346,7 @@ 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); +-- +2.34.1 + 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 + diff --git a/target/linux/generic/pending-5.10/850-0012-PCI-aardvark-Enable-MSI-X-support.patch b/target/linux/generic/pending-5.10/850-0012-PCI-aardvark-Enable-MSI-X-support.patch new file mode 100644 index 0000000000..d5d4005445 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0012-PCI-aardvark-Enable-MSI-X-support.patch @@ -0,0 +1,43 @@ +From 735a4ac9782b96fbe1543c578aa8334364f21abd Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Fri, 2 Apr 2021 14:05:24 +0200 +Subject: [PATCH] PCI: aardvark: Enable MSI-X support +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +According to PCI 3.0 specification, sending both MSI and MSI-X interrupts +is done by DWORD memory write operation to doorbell message address. The +write operation for MSI has zero upper 16 bits and the MSI interrupt number +in the lower 16 bits, while the write operation for MSI-X contains a 32-bit +value from MSI-X table. + +Since the driver only uses interrupt numbers from range 0..31, the upper +16 bits of the DWORD memory write operation to doorbell message address +are zero even for MSI-X interrupts. Thus we can enable MSI-X interrupts. + +Testing proves that kernel can correctly receive MSI-X interrupts from PCIe +cards which supports both MSI and MSI-X interrupts. + +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index 76a65c592b5c..e6cfee3b41a2 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -1342,7 +1342,7 @@ static struct irq_chip advk_msi_irq_chip = { + + static struct msi_domain_info advk_msi_domain_info = { + .flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | +- MSI_FLAG_MULTI_PCI_MSI, ++ MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX, + .chip = &advk_msi_irq_chip, + }; + +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0013-PCI-aardvark-Add-support-for-ERR-interrupt-on-emulat.patch b/target/linux/generic/pending-5.10/850-0013-PCI-aardvark-Add-support-for-ERR-interrupt-on-emulat.patch new file mode 100644 index 0000000000..9b15b7917e --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0013-PCI-aardvark-Add-support-for-ERR-interrupt-on-emulat.patch @@ -0,0 +1,105 @@ +From 7f3e55a3890fa26d15e2e4e90213962d1a7f6df9 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Fri, 12 Feb 2021 20:32:55 +0100 +Subject: [PATCH] PCI: aardvark: Add support for ERR interrupt on emulated + bridge +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +ERR interrupt is triggered when corresponding bit is unmasked in both ISR0 +and PCI_EXP_DEVCTL registers. Unmasking ERR bits in PCI_EXP_DEVCTL register +is not enough. This means that currently the ERR interrupt is never +triggered. + +Unmask ERR bits in ISR0 register at driver probe time. ERR interrupt is not +triggered until ERR bits are unmasked also in PCI_EXP_DEVCTL register, +which is done by AER driver. So it is safe to unconditionally unmask all +ERR bits in aardvark probe. + +Aardvark HW sets PCI_ERR_ROOT_AER_IRQ to zero and when corresponding bits +in ISR0 and PCI_EXP_DEVCTL are enabled, the HW triggers a generic interrupt +on GIC. Chain this interrupt to PCIe interrupt 0 with +generic_handle_domain_irq() to allow processing of ERR interrupts. + +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 36 ++++++++++++++++++++++++++- + 1 file changed, 35 insertions(+), 1 deletion(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index e6cfee3b41a2..7956b103d3c7 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -97,6 +97,10 @@ + #define PCIE_MSG_PM_PME_MASK BIT(7) + #define PCIE_ISR0_MASK_REG (CONTROL_BASE_ADDR + 0x44) + #define PCIE_ISR0_MSI_INT_PENDING BIT(24) ++#define PCIE_ISR0_CORR_ERR BIT(11) ++#define PCIE_ISR0_NFAT_ERR BIT(12) ++#define PCIE_ISR0_FAT_ERR BIT(13) ++#define PCIE_ISR0_ERR_MASK GENMASK(13, 11) + #define PCIE_ISR0_INTX_ASSERT(val) BIT(16 + (val)) + #define PCIE_ISR0_INTX_DEASSERT(val) BIT(20 + (val)) + #define PCIE_ISR0_ALL_MASK GENMASK(31, 0) +@@ -785,11 +789,15 @@ advk_pci_bridge_emul_base_conf_read(struct pci_bridge_emul *bridge, + case PCI_INTERRUPT_LINE: { + /* + * From the whole 32bit register we support reading from HW only +- * one bit: PCI_BRIDGE_CTL_BUS_RESET. ++ * two bits: PCI_BRIDGE_CTL_BUS_RESET and PCI_BRIDGE_CTL_SERR. + * Other bits are retrieved only from emulated config buffer. + */ + __le32 *cfgspace = (__le32 *)&bridge->conf; + u32 val = le32_to_cpu(cfgspace[PCI_INTERRUPT_LINE / 4]); ++ if (advk_readl(pcie, PCIE_ISR0_MASK_REG) & PCIE_ISR0_ERR_MASK) ++ val &= ~(PCI_BRIDGE_CTL_SERR << 16); ++ else ++ val |= PCI_BRIDGE_CTL_SERR << 16; + if (advk_readl(pcie, PCIE_CORE_CTRL1_REG) & HOT_RESET_GEN) + val |= PCI_BRIDGE_CTL_BUS_RESET << 16; + else +@@ -815,6 +823,19 @@ advk_pci_bridge_emul_base_conf_write(struct pci_bridge_emul *bridge, + break; + + case PCI_INTERRUPT_LINE: ++ /* ++ * According to Figure 6-3: Pseudo Logic Diagram for Error ++ * Message Controls in PCIe base specification, SERR# Enable bit ++ * in Bridge Control register enable receiving of ERR_* messages ++ */ ++ if (mask & (PCI_BRIDGE_CTL_SERR << 16)) { ++ u32 val = advk_readl(pcie, PCIE_ISR0_MASK_REG); ++ if (new & (PCI_BRIDGE_CTL_SERR << 16)) ++ val &= ~PCIE_ISR0_ERR_MASK; ++ else ++ val |= PCIE_ISR0_ERR_MASK; ++ advk_writel(pcie, val, PCIE_ISR0_MASK_REG); ++ } + if (mask & (PCI_BRIDGE_CTL_BUS_RESET << 16)) { + u32 val = advk_readl(pcie, PCIE_CORE_CTRL1_REG); + if (new & (PCI_BRIDGE_CTL_BUS_RESET << 16)) +@@ -1464,6 +1485,19 @@ static void advk_pcie_handle_int(struct advk_pcie *pcie) + isr1_mask = advk_readl(pcie, PCIE_ISR1_MASK_REG); + isr1_status = isr1_val & ((~isr1_mask) & PCIE_ISR1_ALL_MASK); + ++ /* Process ERR interrupt */ ++ if (isr0_status & PCIE_ISR0_ERR_MASK) { ++ advk_writel(pcie, PCIE_ISR0_ERR_MASK, PCIE_ISR0_REG); ++ ++ /* ++ * Aardvark HW returns zero for PCI_ERR_ROOT_AER_IRQ, so use ++ * PCIe interrupt 0 ++ */ ++ virq = irq_find_mapping(pcie->irq_domain, 0); ++ if (generic_handle_irq(virq) == -EINVAL) ++ dev_err_ratelimited(&pcie->pdev->dev, "unhandled ERR IRQ\n"); ++ } ++ + /* Process MSI interrupts */ + if (isr0_status & PCIE_ISR0_MSI_INT_PENDING) + advk_pcie_handle_msi(pcie); +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0014-PCI-aardvark-Fix-reading-PCI_EXP_RTSTA_PME-bit-on-em.patch b/target/linux/generic/pending-5.10/850-0014-PCI-aardvark-Fix-reading-PCI_EXP_RTSTA_PME-bit-on-em.patch new file mode 100644 index 0000000000..5b0d7b341a --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0014-PCI-aardvark-Fix-reading-PCI_EXP_RTSTA_PME-bit-on-em.patch @@ -0,0 +1,49 @@ +From 5f354992eeef9a51c67796dc9f7f578d3584baa2 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Wed, 8 Dec 2021 05:57:54 +0100 +Subject: [PATCH] PCI: aardvark: Fix reading PCI_EXP_RTSTA_PME bit on emulated + bridge +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +The emulated bridge returns incorrect value for PCI_EXP_RTSTA register +during readout in advk_pci_bridge_emul_pcie_conf_read() function: the +correct bit is BIT(16), but we are setting BIT(23), because the code +does + *value = (isr0 & PCIE_MSG_PM_PME_MASK) << 16 +where + PCIE_MSG_PM_PME_MASK +is + BIT(7). + +The code should probably have been something like + *value = (!!(isr0 & PCIE_MSG_PM_PME_MASK)) << 16, +but we are better of using an if() and using the proper macro for this +bit. + +Fixes: 8a3ebd8de328 ("PCI: aardvark: Implement emulated root PCI bridge config space") +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 4 +++- + 1 file changed, 3 insertions(+), 1 deletion(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index 7956b103d3c7..44d9c8c4d258 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -874,7 +874,9 @@ advk_pci_bridge_emul_pcie_conf_read(struct pci_bridge_emul *bridge, + case PCI_EXP_RTSTA: { + u32 isr0 = advk_readl(pcie, PCIE_ISR0_REG); + u32 msglog = advk_readl(pcie, PCIE_MSG_LOG_REG); +- *value = (isr0 & PCIE_MSG_PM_PME_MASK) << 16 | (msglog >> 16); ++ *value = msglog >> 16; ++ if (isr0 & PCIE_MSG_PM_PME_MASK) ++ *value |= PCI_EXP_RTSTA_PME; + return PCI_BRIDGE_EMUL_HANDLED; + } + +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0015-PCI-aardvark-Optimize-writing-PCI_EXP_RTCTL_PMEIE-an.patch b/target/linux/generic/pending-5.10/850-0015-PCI-aardvark-Optimize-writing-PCI_EXP_RTCTL_PMEIE-an.patch new file mode 100644 index 0000000000..52af732c44 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0015-PCI-aardvark-Optimize-writing-PCI_EXP_RTCTL_PMEIE-an.patch @@ -0,0 +1,57 @@ +From 3fe0073d116d9902df08761c1cf0d733dd4c38fc Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Wed, 8 Dec 2021 06:03:50 +0100 +Subject: [PATCH] PCI: aardvark: Optimize writing PCI_EXP_RTCTL_PMEIE and + PCI_EXP_RTSTA_PME on emulated bridge +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +To optimize advk_pci_bridge_emul_pcie_conf_write() code, touch +PCIE_ISR0_REG and PCIE_ISR0_MASK_REG registers only when it is really +needed, when processing PCI_EXP_RTCTL_PMEIE and PCI_EXP_RTSTA_PME bits. + +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 20 +++++++++++--------- + 1 file changed, 11 insertions(+), 9 deletions(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index 44d9c8c4d258..efd7e53b5e06 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -933,19 +933,21 @@ advk_pci_bridge_emul_pcie_conf_write(struct pci_bridge_emul *bridge, + advk_pcie_wait_for_retrain(pcie); + break; + +- case PCI_EXP_RTCTL: { ++ case PCI_EXP_RTCTL: + /* Only mask/unmask PME interrupt */ +- u32 val = advk_readl(pcie, PCIE_ISR0_MASK_REG) & +- ~PCIE_MSG_PM_PME_MASK; +- if ((new & PCI_EXP_RTCTL_PMEIE) == 0) +- val |= PCIE_MSG_PM_PME_MASK; +- advk_writel(pcie, val, PCIE_ISR0_MASK_REG); ++ if (mask & PCI_EXP_RTCTL_PMEIE) { ++ u32 val = advk_readl(pcie, PCIE_ISR0_MASK_REG); ++ if (new & PCI_EXP_RTCTL_PMEIE) ++ val &= ~PCIE_MSG_PM_PME_MASK; ++ else ++ val |= PCIE_MSG_PM_PME_MASK; ++ advk_writel(pcie, val, PCIE_ISR0_MASK_REG); ++ } + break; +- } + + case PCI_EXP_RTSTA: +- new = (new & PCI_EXP_RTSTA_PME) >> 9; +- advk_writel(pcie, new, PCIE_ISR0_REG); ++ if (new & PCI_EXP_RTSTA_PME) ++ advk_writel(pcie, PCIE_MSG_PM_PME_MASK, PCIE_ISR0_REG); + break; + + case PCI_EXP_DEVCTL: +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0016-PCI-aardvark-Add-support-for-PME-interrupts.patch b/target/linux/generic/pending-5.10/850-0016-PCI-aardvark-Add-support-for-PME-interrupts.patch new file mode 100644 index 0000000000..76ed7e60a4 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0016-PCI-aardvark-Add-support-for-PME-interrupts.patch @@ -0,0 +1,52 @@ +From 7acd8ef92e8789e10b5d736d73cea3b625087f26 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Wed, 8 Dec 2021 06:07:44 +0100 +Subject: [PATCH] PCI: aardvark: Add support for PME interrupts +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Currently enabling PCI_EXP_RTSTA_PME bit in PCI_EXP_RTCTL register does +nothing. This is because PCIe PME driver expects to receive PCIe interrupt +defined in PCI_EXP_FLAGS_IRQ register, but aardvark hardware does not +trigger PCIe INTx/MSI interrupt for PME event, rather it triggers custom +aardvark interrupt which this driver is not processing yet. + +Fix this issue by handling PME interrupt in advk_pcie_handle_int() and +chaining it to PCIe interrupt 0 with generic_handle_domain_irq() (since +aardvark sets PCI_EXP_FLAGS_IRQ to zero). With this change PCIe PME driver +finally starts receiving PME interrupt. + +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 13 +++++++++++++ + 1 file changed, 13 insertions(+) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index efd7e53b5e06..e2b66b0e8fb3 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -1489,6 +1489,19 @@ static void advk_pcie_handle_int(struct advk_pcie *pcie) + isr1_mask = advk_readl(pcie, PCIE_ISR1_MASK_REG); + isr1_status = isr1_val & ((~isr1_mask) & PCIE_ISR1_ALL_MASK); + ++ /* Process PME interrupt */ ++ if (isr0_status & PCIE_MSG_PM_PME_MASK) { ++ /* ++ * Do not clear PME interrupt bit in ISR0, it is cleared by IRQ ++ * receiver by writing to the PCI_EXP_RTSTA register of emulated ++ * root bridge. Aardvark HW returns zero for PCI_EXP_FLAGS_IRQ, ++ * so use PCIe interrupt 0. ++ */ ++ virq = irq_find_mapping(pcie->irq_domain, 0); ++ if (generic_handle_irq(virq) == -EINVAL) ++ dev_err_ratelimited(&pcie->pdev->dev, "unhandled PME IRQ\n"); ++ } ++ + /* Process ERR interrupt */ + if (isr0_status & PCIE_ISR0_ERR_MASK) { + advk_writel(pcie, PCIE_ISR0_ERR_MASK, PCIE_ISR0_REG); +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0017-PCI-aardvark-Fix-support-for-PME-requester-on-emulat.patch b/target/linux/generic/pending-5.10/850-0017-PCI-aardvark-Fix-support-for-PME-requester-on-emulat.patch new file mode 100644 index 0000000000..692d4ee555 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0017-PCI-aardvark-Fix-support-for-PME-requester-on-emulat.patch @@ -0,0 +1,178 @@ +From 68727b545332327b4c2f9c0f8d006be8970e7832 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Fri, 19 Feb 2021 14:22:22 +0100 +Subject: [PATCH] PCI: aardvark: Fix support for PME requester on emulated + bridge +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Enable aardvark PME interrupt unconditionally by unmasking it and read PME +requester ID to emulated bridge config space immediately after receiving +interrupt. + +PME requester ID is stored in the PCIE_MSG_LOG_REG register, which contains +the last inbound message. So when new inbound message is received by HW +(including non-PM), the content in PCIE_MSG_LOG_REG register is replaced by +a new value. + +PCIe specification mandates that subsequent PMEs are kept pending until the +PME Status Register bit is cleared by software by writing a 1b. + +Support for masking/unmasking PME interrupt on emulated bridge via +PCI_EXP_RTCTL_PMEIE bit is now implemented only in emulated bridge config +space, to ensure that we do not miss any aardvark PME interrupt. + +Reading of PCI_EXP_RTCAP and PCI_EXP_RTSTA registers is simplified as final +value is now always stored into emulated bridge config space by the +interrupt handler, so there is no need to implement support for these +registers in read_pcie callback. + +Clearing of W1C bit PCI_EXP_RTSTA_PME is now also simplified as it is done +by pci-bridge-emul.c code for emulated bridge config space. So there is no +need to implement support for clearing this bit in write_pcie callback. + +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 94 +++++++++++++++------------ + 1 file changed, 52 insertions(+), 42 deletions(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index e2b66b0e8fb3..85a632537b70 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -597,6 +597,11 @@ static void advk_pcie_setup_hw(struct advk_pcie *pcie) + reg &= ~PCIE_ISR0_MSI_INT_PENDING; + advk_writel(pcie, reg, PCIE_ISR0_MASK_REG); + ++ /* Unmask PME interrupt for processing of PME requester */ ++ reg = advk_readl(pcie, PCIE_ISR0_MASK_REG); ++ reg &= ~PCIE_MSG_PM_PME_MASK; ++ advk_writel(pcie, reg, PCIE_ISR0_MASK_REG); ++ + /* Enable summary interrupt for GIC SPI source */ + reg = PCIE_IRQ_ALL_MASK & (~PCIE_IRQ_ENABLE_INTS_MASK); + advk_writel(pcie, reg, HOST_CTRL_INT_MASK_REG); +@@ -863,22 +868,11 @@ advk_pci_bridge_emul_pcie_conf_read(struct pci_bridge_emul *bridge, + *value = PCI_EXP_SLTSTA_PDS << 16; + return PCI_BRIDGE_EMUL_HANDLED; + +- case PCI_EXP_RTCTL: { +- u32 val = advk_readl(pcie, PCIE_ISR0_MASK_REG); +- *value = (val & PCIE_MSG_PM_PME_MASK) ? 0 : PCI_EXP_RTCTL_PMEIE; +- *value |= le16_to_cpu(bridge->pcie_conf.rootctl) & PCI_EXP_RTCTL_CRSSVE; +- *value |= PCI_EXP_RTCAP_CRSVIS << 16; +- return PCI_BRIDGE_EMUL_HANDLED; +- } +- +- case PCI_EXP_RTSTA: { +- u32 isr0 = advk_readl(pcie, PCIE_ISR0_REG); +- u32 msglog = advk_readl(pcie, PCIE_MSG_LOG_REG); +- *value = msglog >> 16; +- if (isr0 & PCIE_MSG_PM_PME_MASK) +- *value |= PCI_EXP_RTSTA_PME; +- return PCI_BRIDGE_EMUL_HANDLED; +- } ++ /* ++ * PCI_EXP_RTCTL and PCI_EXP_RTSTA are also supported, but do not need ++ * to be handled here, because their values are stored in emulated ++ * config space buffer, and we read them from there when needed. ++ */ + + case PCI_EXP_LNKCAP: { + u32 val = advk_readl(pcie, PCIE_CORE_PCIEXP_CAP + reg); +@@ -933,22 +927,19 @@ advk_pci_bridge_emul_pcie_conf_write(struct pci_bridge_emul *bridge, + advk_pcie_wait_for_retrain(pcie); + break; + +- case PCI_EXP_RTCTL: +- /* Only mask/unmask PME interrupt */ +- if (mask & PCI_EXP_RTCTL_PMEIE) { +- u32 val = advk_readl(pcie, PCIE_ISR0_MASK_REG); +- if (new & PCI_EXP_RTCTL_PMEIE) +- val &= ~PCIE_MSG_PM_PME_MASK; +- else +- val |= PCIE_MSG_PM_PME_MASK; +- advk_writel(pcie, val, PCIE_ISR0_MASK_REG); +- } ++ case PCI_EXP_RTCTL: { ++ u16 rootctl = le16_to_cpu(bridge->pcie_conf.rootctl); ++ /* Only emulation of PMEIE and CRSSVE bits is provided */ ++ rootctl &= PCI_EXP_RTCTL_PMEIE | PCI_EXP_RTCTL_CRSSVE; ++ bridge->pcie_conf.rootctl = cpu_to_le16(rootctl); + break; ++ } + +- case PCI_EXP_RTSTA: +- if (new & PCI_EXP_RTSTA_PME) +- advk_writel(pcie, PCIE_MSG_PM_PME_MASK, PCIE_ISR0_REG); +- break; ++ /* ++ * PCI_EXP_RTSTA is also supported, but does not need to be handled ++ * here, because its value is stored in emulated config space buffer, ++ * and we write it there when needed. ++ */ + + case PCI_EXP_DEVCTL: + case PCI_EXP_DEVCTL2: +@@ -1450,6 +1441,34 @@ static void advk_pcie_remove_irq_domain(struct advk_pcie *pcie) + irq_domain_remove(pcie->irq_domain); + } + ++static void advk_pcie_handle_pme(struct advk_pcie *pcie) ++{ ++ u32 requester = advk_readl(pcie, PCIE_MSG_LOG_REG) >> 16; ++ int virq; ++ ++ advk_writel(pcie, PCIE_MSG_PM_PME_MASK, PCIE_ISR0_REG); ++ ++ /* ++ * PCIE_MSG_LOG_REG contains the last inbound message, so store ++ * the requester ID only when PME was not asserted yet. ++ * Also do not trigger PME interrupt when PME is still asserted. ++ */ ++ if (!(le32_to_cpu(pcie->bridge.pcie_conf.rootsta) & PCI_EXP_RTSTA_PME)) { ++ pcie->bridge.pcie_conf.rootsta = cpu_to_le32(requester | PCI_EXP_RTSTA_PME); ++ ++ /* ++ * Trigger PME interrupt only if PMEIE bit in Root Control is set. ++ * Aardvark HW returns zero for PCI_EXP_FLAGS_IRQ, so use PCIe interrupt 0. ++ */ ++ if (!(le16_to_cpu(pcie->bridge.pcie_conf.rootctl) & PCI_EXP_RTCTL_PMEIE)) ++ return; ++ ++ virq = irq_find_mapping(pcie->irq_domain, 0); ++ if (generic_handle_irq(virq) == -EINVAL) ++ dev_err_ratelimited(&pcie->pdev->dev, "unhandled PME IRQ\n"); ++ } ++} ++ + static void advk_pcie_handle_msi(struct advk_pcie *pcie) + { + u32 msi_val, msi_mask, msi_status, msi_idx; +@@ -1489,18 +1508,9 @@ static void advk_pcie_handle_int(struct advk_pcie *pcie) + isr1_mask = advk_readl(pcie, PCIE_ISR1_MASK_REG); + isr1_status = isr1_val & ((~isr1_mask) & PCIE_ISR1_ALL_MASK); + +- /* Process PME interrupt */ +- if (isr0_status & PCIE_MSG_PM_PME_MASK) { +- /* +- * Do not clear PME interrupt bit in ISR0, it is cleared by IRQ +- * receiver by writing to the PCI_EXP_RTSTA register of emulated +- * root bridge. Aardvark HW returns zero for PCI_EXP_FLAGS_IRQ, +- * so use PCIe interrupt 0. +- */ +- virq = irq_find_mapping(pcie->irq_domain, 0); +- if (generic_handle_irq(virq) == -EINVAL) +- dev_err_ratelimited(&pcie->pdev->dev, "unhandled PME IRQ\n"); +- } ++ /* Process PME interrupt as the first one to do not miss PME requester id */ ++ if (isr0_status & PCIE_MSG_PM_PME_MASK) ++ advk_pcie_handle_pme(pcie); + + /* Process ERR interrupt */ + if (isr0_status & PCIE_ISR0_ERR_MASK) { +-- +2.34.1 + 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 new file mode 100644 index 0000000000..46fb548d92 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0018-PCI-aardvark-Use-separate-INTA-interrupt-for-emulate.patch @@ -0,0 +1,166 @@ +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(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index 85a632537b70..b6e723c5725c 100644 +--- 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; +@@ -1441,6 +1442,44 @@ static void advk_pcie_remove_irq_domain(struct advk_pcie *pcie) + 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; +@@ -1463,7 +1502,7 @@ static void advk_pcie_handle_pme(struct advk_pcie *pcie) + 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"); + } +@@ -1520,7 +1559,7 @@ static void advk_pcie_handle_int(struct advk_pcie *pcie) + * 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"); + } +@@ -1566,6 +1605,21 @@ static void advk_pcie_irq_handler(struct irq_desc *desc) + 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); +@@ -1769,14 +1823,24 @@ static int advk_pcie_probe(struct platform_device *pdev) + 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; +@@ -1828,6 +1892,7 @@ static int advk_pcie_remove(struct platform_device *pdev) + 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); + +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0019-PCI-aardvark-Remove-irq_mask_ack-callback-for-INTx-i.patch b/target/linux/generic/pending-5.10/850-0019-PCI-aardvark-Remove-irq_mask_ack-callback-for-INTx-i.patch new file mode 100644 index 0000000000..d9a6de0dc9 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0019-PCI-aardvark-Remove-irq_mask_ack-callback-for-INTx-i.patch @@ -0,0 +1,34 @@ +From 8c9eef96e24f34ff8b62b230700416b822691a37 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Thu, 1 Apr 2021 14:24:12 +0200 +Subject: [PATCH] PCI: aardvark: Remove irq_mask_ack callback for INTx + interrupts +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Callback for irq_mask_ack is the same as for irq_mask. As there is no +special handling for irq_ack, there is no need to define irq_mask_ack too. + +Signed-off-by: Pali Rohár <pali@kernel.org> +Acked-by: Marc Zyngier <maz@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 1 - + 1 file changed, 1 deletion(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index b6e723c5725c..99469e3dc945 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -1420,7 +1420,6 @@ static int advk_pcie_init_irq_domain(struct advk_pcie *pcie) + } + + irq_chip->irq_mask = advk_pcie_irq_mask; +- irq_chip->irq_mask_ack = advk_pcie_irq_mask; + irq_chip->irq_unmask = advk_pcie_irq_unmask; + + pcie->irq_domain = +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0020-PCI-aardvark-Don-t-mask-irq-when-mapping.patch b/target/linux/generic/pending-5.10/850-0020-PCI-aardvark-Don-t-mask-irq-when-mapping.patch new file mode 100644 index 0000000000..e407fc26f9 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0020-PCI-aardvark-Don-t-mask-irq-when-mapping.patch @@ -0,0 +1,32 @@ +From dc01fca5a9d9c09ce9a3fb2bc2e7715c37ff3bd9 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Thu, 1 Apr 2021 14:30:06 +0200 +Subject: [PATCH] PCI: aardvark: Don't mask irq when mapping +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +By default, all Legacy INTx interrupts are masked, so there is no need to +mask this interrupt during irq_map callback. + +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 1 - + 1 file changed, 1 deletion(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index 99469e3dc945..e090276ef902 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -1337,7 +1337,6 @@ static int advk_pcie_irq_map(struct irq_domain *h, + { + struct advk_pcie *pcie = h->host_data; + +- advk_pcie_irq_mask(irq_get_irq_data(virq)); + irq_set_status_flags(virq, IRQ_LEVEL); + irq_set_chip_and_handler(virq, &pcie->irq_chip, + handle_level_irq); +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0021-PCI-aardvark-Drop-__maybe_unused-from-advk_pcie_disa.patch b/target/linux/generic/pending-5.10/850-0021-PCI-aardvark-Drop-__maybe_unused-from-advk_pcie_disa.patch new file mode 100644 index 0000000000..62e748d149 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0021-PCI-aardvark-Drop-__maybe_unused-from-advk_pcie_disa.patch @@ -0,0 +1,33 @@ +From a511c99262ce19ee06908d27212b39ec4c5aeb17 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Marek=20Beh=C3=BAn?= <kabel@kernel.org> +Date: Wed, 8 Dec 2021 04:40:29 +0100 +Subject: [PATCH] PCI: aardvark: Drop __maybe_unused from + advk_pcie_disable_phy() +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This function is now always used in driver remove method, drop the +__maybe_unused attribute. + +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index e090276ef902..aa5629b8b5c9 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -1618,7 +1618,7 @@ static int advk_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) + return of_irq_parse_and_map_pci(dev, slot, pin); + } + +-static void __maybe_unused advk_pcie_disable_phy(struct advk_pcie *pcie) ++static void advk_pcie_disable_phy(struct advk_pcie *pcie) + { + phy_power_off(pcie->phy); + phy_exit(pcie->phy); +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0022-PCI-aardvark-Update-comment-about-link-going-down-af.patch b/target/linux/generic/pending-5.10/850-0022-PCI-aardvark-Update-comment-about-link-going-down-af.patch new file mode 100644 index 0000000000..5a2f065125 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0022-PCI-aardvark-Update-comment-about-link-going-down-af.patch @@ -0,0 +1,40 @@ +From bafda858364003a70b9cda84282f9761587f8033 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Marek=20Beh=C3=BAn?= <kabel@kernel.org> +Date: Mon, 10 Jan 2022 00:47:38 +0100 +Subject: [PATCH] PCI: aardvark: Update comment about link going down after + link-up +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Update the comment about what happens when link goes down after we have +checked for link-up. If a PIO request is done while link-down, we have +a serious problem. + +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 8 ++++++-- + 1 file changed, 6 insertions(+), 2 deletions(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index aa5629b8b5c9..3c0b6b931061 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -1003,8 +1003,12 @@ static bool advk_pcie_valid_device(struct advk_pcie *pcie, struct pci_bus *bus, + return false; + + /* +- * If the link goes down after we check for link-up, nothing bad +- * happens but the config access times out. ++ * If the link goes down after we check for link-up, we have a problem: ++ * if a PIO request is executed while link-down, the whole controller ++ * gets stuck in a non-functional state, and even after link comes up ++ * again, PIO requests won't work anymore, and a reset of the whole PCIe ++ * controller is needed. Therefore we need to prevent sending PIO ++ * requests while the link is down. + */ + if (!pci_is_root_bus(bus) && !advk_pcie_link_up(pcie)) + return false; +-- +2.34.1 + diff --git a/target/linux/generic/pending-5.10/850-0023-PCI-aardvark-Make-main-irq_chip-structure-a-static-d.patch b/target/linux/generic/pending-5.10/850-0023-PCI-aardvark-Make-main-irq_chip-structure-a-static-d.patch new file mode 100644 index 0000000000..2951529df7 --- /dev/null +++ b/target/linux/generic/pending-5.10/850-0023-PCI-aardvark-Make-main-irq_chip-structure-a-static-d.patch @@ -0,0 +1,107 @@ +From 663b9f99bb35dbc0c7b685f71ee3668a60d31320 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Marek=20Beh=C3=BAn?= <kabel@kernel.org> +Date: Mon, 10 Jan 2022 02:02:00 +0100 +Subject: [PATCH] PCI: aardvark: Make main irq_chip structure a static driver + structure +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Marc Zyngier says [1] that we should use struct irq_chip as a global +static struct in the driver. Even though the structure currently +contains a dynamic member (parent_device), Marc says [2] that he plans +to kill it and make the structure completely static. + +We have already converted others irq_chip structures in this driver in +this way, but we omitted this one because the .name member is +dynamically created from device's name, and the name is displayed in +sysfs, so changing it would break sysfs ABI. + +The rationale for changing the name (to "advk-INT") in spite of sysfs +ABI, and thus allowing to convert to a static structure, is that after +the other changes we made in this series, the IRQ chip is basically +something different: it no logner generates ERR and PME interrupts (they +are generated by emulated bridge's rp_irq_chip). + +[1] https://lore.kernel.org/linux-pci/877dbcvngf.wl-maz@kernel.org/ +[2] https://lore.kernel.org/linux-pci/874k6gvkhz.wl-maz@kernel.org/ + +Signed-off-by: Marek Behún <kabel@kernel.org> +--- + drivers/pci/controller/pci-aardvark.c | 25 +++++++------------------ + 1 file changed, 7 insertions(+), 18 deletions(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index 3c0b6b931061..319dd830e36e 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -282,7 +282,6 @@ struct advk_pcie { + int irq; + struct irq_domain *rp_irq_domain; + struct irq_domain *irq_domain; +- struct irq_chip irq_chip; + raw_spinlock_t irq_lock; + struct irq_domain *msi_domain; + struct irq_domain *msi_inner_domain; +@@ -1336,14 +1335,19 @@ static void advk_pcie_irq_unmask(struct irq_data *d) + raw_spin_unlock_irqrestore(&pcie->irq_lock, flags); + } + ++static struct irq_chip advk_irq_chip = { ++ .name = "advk-INT", ++ .irq_mask = advk_pcie_irq_mask, ++ .irq_unmask = advk_pcie_irq_unmask, ++}; ++ + static int advk_pcie_irq_map(struct irq_domain *h, + unsigned int virq, irq_hw_number_t hwirq) + { + struct advk_pcie *pcie = h->host_data; + + irq_set_status_flags(virq, IRQ_LEVEL); +- irq_set_chip_and_handler(virq, &pcie->irq_chip, +- handle_level_irq); ++ irq_set_chip_and_handler(virq, &advk_irq_chip, handle_level_irq); + irq_set_chip_data(virq, pcie); + + return 0; +@@ -1402,7 +1406,6 @@ static int advk_pcie_init_irq_domain(struct advk_pcie *pcie) + struct device *dev = &pcie->pdev->dev; + struct device_node *node = dev->of_node; + struct device_node *pcie_intc_node; +- struct irq_chip *irq_chip; + int ret = 0; + + raw_spin_lock_init(&pcie->irq_lock); +@@ -1413,28 +1416,14 @@ static int advk_pcie_init_irq_domain(struct advk_pcie *pcie) + return -ENODEV; + } + +- irq_chip = &pcie->irq_chip; +- +- irq_chip->name = devm_kasprintf(dev, GFP_KERNEL, "%s-irq", +- dev_name(dev)); +- if (!irq_chip->name) { +- ret = -ENOMEM; +- goto out_put_node; +- } +- +- irq_chip->irq_mask = advk_pcie_irq_mask; +- irq_chip->irq_unmask = advk_pcie_irq_unmask; +- + pcie->irq_domain = + irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX, + &advk_pcie_irq_domain_ops, pcie); + if (!pcie->irq_domain) { + dev_err(dev, "Failed to get a INTx IRQ domain\n"); + ret = -ENOMEM; +- goto out_put_node; + } + +-out_put_node: + of_node_put(pcie_intc_node); + return ret; + } +-- +2.34.1 + |