diff options
| author | Marek Behún <kabel@kernel.org> | 2022-01-09 22:40:31 +0100 |
|---|---|---|
| committer | Christian Lamparter <chunkeey@gmail.com> | 2022-01-15 17:26:55 +0100 |
| commit | 612e1c68016495d69dc87eac5c1b1c845532d2a7 (patch) | |
| tree | 7658022bb0a0c59f047dc8eab1b7da763b984997 /target/linux/generic/backport-5.10 | |
| parent | 9d530ac4bf6b9804a06dbf5df4631ee86f1304c1 (diff) | |
| download | upstream-612e1c68016495d69dc87eac5c1b1c845532d2a7.tar.gz upstream-612e1c68016495d69dc87eac5c1b1c845532d2a7.tar.bz2 upstream-612e1c68016495d69dc87eac5c1b1c845532d2a7.zip | |
kernel: 5.10: Backport pci-aardvark driver changes from 5.17
Backport Aardvark PCIe controller driver changes that will appear in
5.17 kernel. They are currently accessible on LKML [1], in linux-next
repository [2], or in Bjorn Helgaas' repository [3].
These changes mainly enhance driver removal method.
[1] https://lore.kernel.org/linux-pci/20211130172913.9727-1-kabel@kernel.org/
[2] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/log/drivers/pci?h=next-20220107
[3] https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git/log/?h=next
Signed-off-by: Marek Behún <kabel@kernel.org>
Diffstat (limited to 'target/linux/generic/backport-5.10')
11 files changed, 545 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.10/850-v5.17-0001-PCI-pci-bridge-emul-Add-description-for-class_revisi.patch b/target/linux/generic/backport-5.10/850-v5.17-0001-PCI-pci-bridge-emul-Add-description-for-class_revisi.patch new file mode 100644 index 0000000000..b856df3f3d --- /dev/null +++ b/target/linux/generic/backport-5.10/850-v5.17-0001-PCI-pci-bridge-emul-Add-description-for-class_revisi.patch @@ -0,0 +1,49 @@ +From 9319230ac147067652b58fe849ffe0ceec098665 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Tue, 30 Nov 2021 18:29:03 +0100 +Subject: [PATCH] PCI: pci-bridge-emul: Add description for class_revision + field +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +The current assignment to the class_revision member + + class_revision |= cpu_to_le32(PCI_CLASS_BRIDGE_PCI << 16); + +can make the reader think that class is at high 16 bits of the member and +revision at low 16 bits. + +In reality, class is at high 24 bits, but the class for PCI Bridge Normal +Decode is PCI_CLASS_BRIDGE_PCI << 8. + +Change the assignment and add a comment to make this clearer. + +Link: https://lore.kernel.org/r/20211130172913.9727-2-kabel@kernel.org +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> +--- + drivers/pci/pci-bridge-emul.c | 6 +++++- + 1 file changed, 5 insertions(+), 1 deletion(-) + +diff --git a/drivers/pci/pci-bridge-emul.c b/drivers/pci/pci-bridge-emul.c +index db97cddfc85e..a4af1a533d71 100644 +--- a/drivers/pci/pci-bridge-emul.c ++++ b/drivers/pci/pci-bridge-emul.c +@@ -265,7 +265,11 @@ int pci_bridge_emul_init(struct pci_bridge_emul *bridge, + { + BUILD_BUG_ON(sizeof(bridge->conf) != PCI_BRIDGE_CONF_END); + +- bridge->conf.class_revision |= cpu_to_le32(PCI_CLASS_BRIDGE_PCI << 16); ++ /* ++ * class_revision: Class is high 24 bits and revision is low 8 bit of this member, ++ * while class for PCI Bridge Normal Decode has the 24-bit value: PCI_CLASS_BRIDGE_PCI << 8 ++ */ ++ bridge->conf.class_revision |= cpu_to_le32((PCI_CLASS_BRIDGE_PCI << 8) << 8); + bridge->conf.header_type = PCI_HEADER_TYPE_BRIDGE; + bridge->conf.cache_line_size = 0x10; + bridge->conf.status = cpu_to_le16(PCI_STATUS_CAP_LIST); +-- +2.34.1 + diff --git a/target/linux/generic/backport-5.10/850-v5.17-0002-PCI-pci-bridge-emul-Add-definitions-for-missing-capa.patch b/target/linux/generic/backport-5.10/850-v5.17-0002-PCI-pci-bridge-emul-Add-definitions-for-missing-capa.patch new file mode 100644 index 0000000000..713f92d594 --- /dev/null +++ b/target/linux/generic/backport-5.10/850-v5.17-0002-PCI-pci-bridge-emul-Add-definitions-for-missing-capa.patch @@ -0,0 +1,78 @@ +From 8ea673a8b30b4a32516b8adabb15e2a68ff02ec8 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Tue, 30 Nov 2021 18:29:04 +0100 +Subject: [PATCH] PCI: pci-bridge-emul: Add definitions for missing + capabilities registers +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +pci-bridge-emul driver already allocates buffer for capabilities up to the +PCI_EXP_SLTSTA2 register, but does not define bit access behavior for these +registers. Add these missing definitions. + +Link: https://lore.kernel.org/r/20211130172913.9727-3-kabel@kernel.org +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> +--- + drivers/pci/pci-bridge-emul.c | 43 +++++++++++++++++++++++++++++++++++ + 1 file changed, 43 insertions(+) + +diff --git a/drivers/pci/pci-bridge-emul.c b/drivers/pci/pci-bridge-emul.c +index a4af1a533d71..0d1177e52a43 100644 +--- a/drivers/pci/pci-bridge-emul.c ++++ b/drivers/pci/pci-bridge-emul.c +@@ -251,6 +251,49 @@ struct pci_bridge_reg_behavior pcie_cap_regs_behavior[PCI_CAP_PCIE_SIZEOF / 4] = + .ro = GENMASK(15, 0) | PCI_EXP_RTSTA_PENDING, + .w1c = PCI_EXP_RTSTA_PME, + }, ++ ++ [PCI_EXP_DEVCAP2 / 4] = { ++ /* ++ * Device capabilities 2 register has reserved bits [30:27]. ++ * Also bits [26:24] are reserved for non-upstream ports. ++ */ ++ .ro = BIT(31) | GENMASK(23, 0), ++ }, ++ ++ [PCI_EXP_DEVCTL2 / 4] = { ++ /* ++ * Device control 2 register is RW. Bit 11 is reserved for ++ * non-upstream ports. ++ * ++ * Device status 2 register is reserved. ++ */ ++ .rw = GENMASK(15, 12) | GENMASK(10, 0), ++ }, ++ ++ [PCI_EXP_LNKCAP2 / 4] = { ++ /* Link capabilities 2 register has reserved bits [30:25] and 0. */ ++ .ro = BIT(31) | GENMASK(24, 1), ++ }, ++ ++ [PCI_EXP_LNKCTL2 / 4] = { ++ /* ++ * Link control 2 register is RW. ++ * ++ * Link status 2 register has bits 5, 15 W1C; ++ * bits 10, 11 reserved and others are RO. ++ */ ++ .rw = GENMASK(15, 0), ++ .w1c = (BIT(15) | BIT(5)) << 16, ++ .ro = (GENMASK(14, 12) | GENMASK(9, 6) | GENMASK(4, 0)) << 16, ++ }, ++ ++ [PCI_EXP_SLTCAP2 / 4] = { ++ /* Slot capabilities 2 register is reserved. */ ++ }, ++ ++ [PCI_EXP_SLTCTL2 / 4] = { ++ /* Both Slot control 2 and Slot status 2 registers are reserved. */ ++ }, + }; + + /* +-- +2.34.1 + diff --git a/target/linux/generic/backport-5.10/850-v5.17-0003-PCI-aardvark-Add-support-for-DEVCAP2-DEVCTL2-LNKCAP2.patch b/target/linux/generic/backport-5.10/850-v5.17-0003-PCI-aardvark-Add-support-for-DEVCAP2-DEVCTL2-LNKCAP2.patch new file mode 100644 index 0000000000..57940bdb79 --- /dev/null +++ b/target/linux/generic/backport-5.10/850-v5.17-0003-PCI-aardvark-Add-support-for-DEVCAP2-DEVCTL2-LNKCAP2.patch @@ -0,0 +1,66 @@ +From 1d3e170344dff2cef8827db6c09909b78cbc11d7 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Tue, 30 Nov 2021 18:29:05 +0100 +Subject: [PATCH] PCI: aardvark: Add support for DEVCAP2, DEVCTL2, LNKCAP2 and + LNKCTL2 registers on emulated bridge +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +PCI aardvark hardware supports access to DEVCAP2, DEVCTL2, LNKCAP2 and +LNKCTL2 configuration registers of PCIe core via PCIE_CORE_PCIEXP_CAP. +Export them via emulated software root bridge. + +Link: https://lore.kernel.org/r/20211130172913.9727-4-kabel@kernel.org +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> +--- + drivers/pci/controller/pci-aardvark.c | 15 +++++++++++---- + 1 file changed, 11 insertions(+), 4 deletions(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index c5300d49807a..25af189a1052 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -884,8 +884,13 @@ advk_pci_bridge_emul_pcie_conf_read(struct pci_bridge_emul *bridge, + case PCI_CAP_LIST_ID: + case PCI_EXP_DEVCAP: + case PCI_EXP_DEVCTL: ++ case PCI_EXP_DEVCAP2: ++ case PCI_EXP_DEVCTL2: ++ case PCI_EXP_LNKCAP2: ++ case PCI_EXP_LNKCTL2: + *value = advk_readl(pcie, PCIE_CORE_PCIEXP_CAP + reg); + return PCI_BRIDGE_EMUL_HANDLED; ++ + default: + return PCI_BRIDGE_EMUL_NOT_HANDLED; + } +@@ -899,10 +904,6 @@ advk_pci_bridge_emul_pcie_conf_write(struct pci_bridge_emul *bridge, + struct advk_pcie *pcie = bridge->data; + + switch (reg) { +- case PCI_EXP_DEVCTL: +- advk_writel(pcie, new, PCIE_CORE_PCIEXP_CAP + reg); +- break; +- + case PCI_EXP_LNKCTL: + advk_writel(pcie, new, PCIE_CORE_PCIEXP_CAP + reg); + if (new & PCI_EXP_LNKCTL_RL) +@@ -924,6 +925,12 @@ advk_pci_bridge_emul_pcie_conf_write(struct pci_bridge_emul *bridge, + advk_writel(pcie, new, PCIE_ISR0_REG); + break; + ++ case PCI_EXP_DEVCTL: ++ case PCI_EXP_DEVCTL2: ++ case PCI_EXP_LNKCTL2: ++ advk_writel(pcie, new, PCIE_CORE_PCIEXP_CAP + reg); ++ break; ++ + default: + break; + } +-- +2.34.1 + diff --git a/target/linux/generic/backport-5.10/850-v5.17-0004-PCI-aardvark-Clear-all-MSIs-at-setup.patch b/target/linux/generic/backport-5.10/850-v5.17-0004-PCI-aardvark-Clear-all-MSIs-at-setup.patch new file mode 100644 index 0000000000..afa8a1d9a2 --- /dev/null +++ b/target/linux/generic/backport-5.10/850-v5.17-0004-PCI-aardvark-Clear-all-MSIs-at-setup.patch @@ -0,0 +1,64 @@ +From 7d8dc1f7cd007a7ce94c5b4c20d63a8b8d6d7751 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Tue, 30 Nov 2021 18:29:06 +0100 +Subject: [PATCH] PCI: aardvark: Clear all MSIs at setup +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +We already clear all the other interrupts (ISR0, ISR1, HOST_CTRL_INT). + +Define a new macro PCIE_MSI_ALL_MASK and do the same clearing for MSIs, +to ensure that we don't start receiving spurious interrupts. + +Use this new mask in advk_pcie_handle_msi(); + +Link: https://lore.kernel.org/r/20211130172913.9727-5-kabel@kernel.org +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> +--- + drivers/pci/controller/pci-aardvark.c | 6 ++++-- + 1 file changed, 4 insertions(+), 2 deletions(-) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index 25af189a1052..71ce9f02d596 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -116,6 +116,7 @@ + #define PCIE_MSI_ADDR_HIGH_REG (CONTROL_BASE_ADDR + 0x54) + #define PCIE_MSI_STATUS_REG (CONTROL_BASE_ADDR + 0x58) + #define PCIE_MSI_MASK_REG (CONTROL_BASE_ADDR + 0x5C) ++#define PCIE_MSI_ALL_MASK GENMASK(31, 0) + #define PCIE_MSI_PAYLOAD_REG (CONTROL_BASE_ADDR + 0x9C) + #define PCIE_MSI_DATA_MASK GENMASK(15, 0) + +@@ -571,6 +572,7 @@ static void advk_pcie_setup_hw(struct advk_pcie *pcie) + advk_writel(pcie, reg, PCIE_CORE_CTRL2_REG); + + /* Clear all interrupts */ ++ advk_writel(pcie, PCIE_MSI_ALL_MASK, PCIE_MSI_STATUS_REG); + advk_writel(pcie, PCIE_ISR0_ALL_MASK, PCIE_ISR0_REG); + advk_writel(pcie, PCIE_ISR1_ALL_MASK, PCIE_ISR1_REG); + advk_writel(pcie, PCIE_IRQ_ALL_MASK, HOST_CTRL_INT_STATUS_REG); +@@ -583,7 +585,7 @@ static void advk_pcie_setup_hw(struct advk_pcie *pcie) + advk_writel(pcie, PCIE_ISR1_ALL_MASK, PCIE_ISR1_MASK_REG); + + /* Unmask all MSIs */ +- advk_writel(pcie, 0, PCIE_MSI_MASK_REG); ++ advk_writel(pcie, ~(u32)PCIE_MSI_ALL_MASK, PCIE_MSI_MASK_REG); + + /* Enable summary interrupt for GIC SPI source */ + reg = PCIE_IRQ_ALL_MASK & (~PCIE_IRQ_ENABLE_INTS_MASK); +@@ -1399,7 +1401,7 @@ static void advk_pcie_handle_msi(struct advk_pcie *pcie) + + msi_mask = advk_readl(pcie, PCIE_MSI_MASK_REG); + msi_val = advk_readl(pcie, PCIE_MSI_STATUS_REG); +- msi_status = msi_val & ~msi_mask; ++ msi_status = msi_val & ((~msi_mask) & PCIE_MSI_ALL_MASK); + + for (msi_idx = 0; msi_idx < MSI_IRQ_NUM; msi_idx++) { + if (!(BIT(msi_idx) & msi_status)) +-- +2.34.1 + diff --git a/target/linux/generic/backport-5.10/850-v5.17-0005-PCI-aardvark-Comment-actions-in-driver-remove-method.patch b/target/linux/generic/backport-5.10/850-v5.17-0005-PCI-aardvark-Comment-actions-in-driver-remove-method.patch new file mode 100644 index 0000000000..be60483207 --- /dev/null +++ b/target/linux/generic/backport-5.10/850-v5.17-0005-PCI-aardvark-Comment-actions-in-driver-remove-method.patch @@ -0,0 +1,39 @@ +From a4ca7948e1d47275f8f3e5023243440c40561916 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Tue, 30 Nov 2021 18:29:07 +0100 +Subject: [PATCH] PCI: aardvark: Comment actions in driver remove method +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Add two more comments into the advk_pcie_remove() method. + +Link: https://lore.kernel.org/r/20211130172913.9727-6-kabel@kernel.org +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> +--- + drivers/pci/controller/pci-aardvark.c | 2 ++ + 1 file changed, 2 insertions(+) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index 71ce9f02d596..6348584c33be 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -1697,11 +1697,13 @@ static int advk_pcie_remove(struct platform_device *pdev) + struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie); + int i; + ++ /* Remove PCI bus with all devices */ + pci_lock_rescan_remove(); + pci_stop_root_bus(bridge->bus); + pci_remove_root_bus(bridge->bus); + pci_unlock_rescan_remove(); + ++ /* 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/backport-5.10/850-v5.17-0006-PCI-aardvark-Disable-bus-mastering-when-unbinding-dr.patch b/target/linux/generic/backport-5.10/850-v5.17-0006-PCI-aardvark-Disable-bus-mastering-when-unbinding-dr.patch new file mode 100644 index 0000000000..2267821f73 --- /dev/null +++ b/target/linux/generic/backport-5.10/850-v5.17-0006-PCI-aardvark-Disable-bus-mastering-when-unbinding-dr.patch @@ -0,0 +1,46 @@ +From a46f2f6dd4093438d9615dfbf5c0fea2a9835dba Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Tue, 30 Nov 2021 18:29:08 +0100 +Subject: [PATCH] PCI: aardvark: Disable bus mastering when unbinding driver +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Ensure that after driver unbind PCIe cards are not able to forward +memory and I/O requests in the upstream direction. + +Link: https://lore.kernel.org/r/20211130172913.9727-7-kabel@kernel.org +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> +--- + drivers/pci/controller/pci-aardvark.c | 6 ++++++ + 1 file changed, 6 insertions(+) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index 6348584c33be..12eae05f3d10 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -1695,6 +1695,7 @@ static int advk_pcie_remove(struct platform_device *pdev) + { + struct advk_pcie *pcie = platform_get_drvdata(pdev); + struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie); ++ u32 val; + int i; + + /* Remove PCI bus with all devices */ +@@ -1703,6 +1704,11 @@ static int advk_pcie_remove(struct platform_device *pdev) + pci_remove_root_bus(bridge->bus); + pci_unlock_rescan_remove(); + ++ /* Disable Root Bridge I/O space, memory space and bus mastering */ ++ val = advk_readl(pcie, PCIE_CORE_CMD_STATUS_REG); ++ val &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); ++ advk_writel(pcie, val, PCIE_CORE_CMD_STATUS_REG); ++ + /* 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/backport-5.10/850-v5.17-0007-PCI-aardvark-Mask-all-interrupts-when-unbinding-driv.patch b/target/linux/generic/backport-5.10/850-v5.17-0007-PCI-aardvark-Mask-all-interrupts-when-unbinding-driv.patch new file mode 100644 index 0000000000..e330d3f2a1 --- /dev/null +++ b/target/linux/generic/backport-5.10/850-v5.17-0007-PCI-aardvark-Mask-all-interrupts-when-unbinding-driv.patch @@ -0,0 +1,53 @@ +From 13bcdf07cb2ecff5d45d2c141df2539b15211448 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Tue, 30 Nov 2021 18:29:09 +0100 +Subject: [PATCH] PCI: aardvark: Mask all interrupts when unbinding driver +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Ensure that no interrupt can be triggered after driver unbind. + +Link: https://lore.kernel.org/r/20211130172913.9727-8-kabel@kernel.org +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> +--- + drivers/pci/controller/pci-aardvark.c | 21 +++++++++++++++++++++ + 1 file changed, 21 insertions(+) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index 12eae05f3d10..08b34accfe2f 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -1709,6 +1709,27 @@ static int advk_pcie_remove(struct platform_device *pdev) + val &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); + advk_writel(pcie, val, PCIE_CORE_CMD_STATUS_REG); + ++ /* Disable MSI */ ++ val = advk_readl(pcie, PCIE_CORE_CTRL2_REG); ++ val &= ~PCIE_CORE_CTRL2_MSI_ENABLE; ++ advk_writel(pcie, val, PCIE_CORE_CTRL2_REG); ++ ++ /* Clear MSI address */ ++ advk_writel(pcie, 0, PCIE_MSI_ADDR_LOW_REG); ++ advk_writel(pcie, 0, PCIE_MSI_ADDR_HIGH_REG); ++ ++ /* Mask all interrupts */ ++ advk_writel(pcie, PCIE_MSI_ALL_MASK, PCIE_MSI_MASK_REG); ++ advk_writel(pcie, PCIE_ISR0_ALL_MASK, PCIE_ISR0_MASK_REG); ++ advk_writel(pcie, PCIE_ISR1_ALL_MASK, PCIE_ISR1_MASK_REG); ++ advk_writel(pcie, PCIE_IRQ_ALL_MASK, HOST_CTRL_INT_MASK_REG); ++ ++ /* Clear all interrupts */ ++ advk_writel(pcie, PCIE_MSI_ALL_MASK, PCIE_MSI_STATUS_REG); ++ advk_writel(pcie, PCIE_ISR0_ALL_MASK, PCIE_ISR0_REG); ++ advk_writel(pcie, PCIE_ISR1_ALL_MASK, PCIE_ISR1_REG); ++ advk_writel(pcie, PCIE_IRQ_ALL_MASK, HOST_CTRL_INT_STATUS_REG); ++ + /* 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/backport-5.10/850-v5.17-0008-PCI-aardvark-Fix-memory-leak-in-driver-unbind.patch b/target/linux/generic/backport-5.10/850-v5.17-0008-PCI-aardvark-Fix-memory-leak-in-driver-unbind.patch new file mode 100644 index 0000000000..24b4166870 --- /dev/null +++ b/target/linux/generic/backport-5.10/850-v5.17-0008-PCI-aardvark-Fix-memory-leak-in-driver-unbind.patch @@ -0,0 +1,38 @@ +From 2f040a17f5061457ae95035326d3159eddc1e5cc Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Tue, 30 Nov 2021 18:29:10 +0100 +Subject: [PATCH] PCI: aardvark: Fix memory leak in driver unbind +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Free config space for emulated root bridge when unbinding driver to fix +memory leak. Do it after disabling and masking all interrupts, since +aardvark interrupt handler accesses config space of emulated root +bridge. + +Link: https://lore.kernel.org/r/20211130172913.9727-9-kabel@kernel.org +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> +--- + drivers/pci/controller/pci-aardvark.c | 3 +++ + 1 file changed, 3 insertions(+) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index 08b34accfe2f..b3d89cb449b6 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -1734,6 +1734,9 @@ static int advk_pcie_remove(struct platform_device *pdev) + advk_pcie_remove_msi_irq_domain(pcie); + advk_pcie_remove_irq_domain(pcie); + ++ /* Free config space for emulated root bridge */ ++ pci_bridge_emul_cleanup(&pcie->bridge); ++ + /* Disable outbound address windows mapping */ + for (i = 0; i < OB_WIN_COUNT; i++) + advk_pcie_disable_ob_win(pcie, i); +-- +2.34.1 + diff --git a/target/linux/generic/backport-5.10/850-v5.17-0009-PCI-aardvark-Assert-PERST-when-unbinding-driver.patch b/target/linux/generic/backport-5.10/850-v5.17-0009-PCI-aardvark-Assert-PERST-when-unbinding-driver.patch new file mode 100644 index 0000000000..8b6beed8c8 --- /dev/null +++ b/target/linux/generic/backport-5.10/850-v5.17-0009-PCI-aardvark-Assert-PERST-when-unbinding-driver.patch @@ -0,0 +1,38 @@ +From 1f54391be8ce0c981d312cb93acdc5608def576a Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Tue, 30 Nov 2021 18:29:11 +0100 +Subject: [PATCH] PCI: aardvark: Assert PERST# when unbinding driver +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Put the PCIe card into reset by asserting PERST# signal when unbinding +driver. It doesn't make sense to leave the card working if it can't +communicate with the host. This should also save some power. + +Link: https://lore.kernel.org/r/20211130172913.9727-10-kabel@kernel.org +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> +--- + drivers/pci/controller/pci-aardvark.c | 4 ++++ + 1 file changed, 4 insertions(+) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index b3d89cb449b6..271ebecee965 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -1737,6 +1737,10 @@ static int advk_pcie_remove(struct platform_device *pdev) + /* Free config space for emulated root bridge */ + pci_bridge_emul_cleanup(&pcie->bridge); + ++ /* Assert PERST# signal which prepares PCIe card for power down */ ++ if (pcie->reset_gpio) ++ gpiod_set_value_cansleep(pcie->reset_gpio, 1); ++ + /* Disable outbound address windows mapping */ + for (i = 0; i < OB_WIN_COUNT; i++) + advk_pcie_disable_ob_win(pcie, i); +-- +2.34.1 + diff --git a/target/linux/generic/backport-5.10/850-v5.17-0010-PCI-aardvark-Disable-link-training-when-unbinding-dr.patch b/target/linux/generic/backport-5.10/850-v5.17-0010-PCI-aardvark-Disable-link-training-when-unbinding-dr.patch new file mode 100644 index 0000000000..8b7682c34e --- /dev/null +++ b/target/linux/generic/backport-5.10/850-v5.17-0010-PCI-aardvark-Disable-link-training-when-unbinding-dr.patch @@ -0,0 +1,39 @@ +From 759dec2e3dfdbd261c41d2279f04f2351c971a49 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Tue, 30 Nov 2021 18:29:12 +0100 +Subject: [PATCH] PCI: aardvark: Disable link training when unbinding driver +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Disable link training circuit in driver unbind sequence. We want to +leave link training in the same state as it was before the driver was +probed. + +Link: https://lore.kernel.org/r/20211130172913.9727-11-kabel@kernel.org +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> +--- + drivers/pci/controller/pci-aardvark.c | 5 +++++ + 1 file changed, 5 insertions(+) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index 271ebecee965..e5c88f1c177b 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -1741,6 +1741,11 @@ static int advk_pcie_remove(struct platform_device *pdev) + if (pcie->reset_gpio) + gpiod_set_value_cansleep(pcie->reset_gpio, 1); + ++ /* Disable link training */ ++ val = advk_readl(pcie, PCIE_CORE_CTRL0_REG); ++ val &= ~LINK_TRAINING_EN; ++ advk_writel(pcie, val, PCIE_CORE_CTRL0_REG); ++ + /* Disable outbound address windows mapping */ + for (i = 0; i < OB_WIN_COUNT; i++) + advk_pcie_disable_ob_win(pcie, i); +-- +2.34.1 + diff --git a/target/linux/generic/backport-5.10/850-v5.17-0011-PCI-aardvark-Disable-common-PHY-when-unbinding-drive.patch b/target/linux/generic/backport-5.10/850-v5.17-0011-PCI-aardvark-Disable-common-PHY-when-unbinding-drive.patch new file mode 100644 index 0000000000..b1904a4bd6 --- /dev/null +++ b/target/linux/generic/backport-5.10/850-v5.17-0011-PCI-aardvark-Disable-common-PHY-when-unbinding-drive.patch @@ -0,0 +1,35 @@ +From fdbbe242c15a8f2cd0e3ad8a56cd0a447b771d0d Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Tue, 30 Nov 2021 18:29:13 +0100 +Subject: [PATCH] PCI: aardvark: Disable common PHY when unbinding driver +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Disable the PCIe PHY when unbinding driver. This should save some power. + +Link: https://lore.kernel.org/r/20211130172913.9727-12-kabel@kernel.org +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <kabel@kernel.org> +Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> +--- + drivers/pci/controller/pci-aardvark.c | 3 +++ + 1 file changed, 3 insertions(+) + +diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c +index e5c88f1c177b..2a82c4652c28 100644 +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -1750,6 +1750,9 @@ static int advk_pcie_remove(struct platform_device *pdev) + for (i = 0; i < OB_WIN_COUNT; i++) + advk_pcie_disable_ob_win(pcie, i); + ++ /* Disable phy */ ++ advk_pcie_disable_phy(pcie); ++ + return 0; + } + +-- +2.34.1 + |