mediatek: mt7623: import patch to fix msi warning

The 1st generation MediaTek PCIe host bridge cannot handle Message
Signaled Interrupts (MSIs). The core PCI code is not aware that MSI is
not available. This results in warnings of the form:

WARNING: CPU: 2 PID: 112 at include/linux/msi.h:219
  pci_msi_setup_msi_irqs.constprop.8+0x64/0x6c
Modules linked in: ahci(+) libahci libata sd_mod scsi_mod
  gpio_button_hotplug
CPU: 2 PID: 112 Comm: kmodloader Not tainted 5.10.52 #0
Hardware name: Mediatek Cortex-A7 (Device Tree)

Import patches that introduce the 'no_msi' attribute to signal missing
MSI support to the core PCI.

Refresh patches:
- 000-spi-fix-fifo.patch
- 330-mtk-bmt-support.patch
- 510-net-mediatek-add-flow-offload-for-mt7623.patch
- 601-PCI-mediatek-Use-regmap-to-get-shared-pcie-cfg-base.patch
- 610-pcie-mediatek-fix-clearing-interrupt-status.patch
- 700-net-ethernet-mtk_eth_soc-add-support-for-coherent-DM.patch
- 710-pci-pcie-mediatek-add-support-for-coherent-DMA.patch

Signed-off-by: Nick Hainke <[email protected]>

target/linux/generic/backport-5.10/820-v5.13-make-pci_host_common_probe-declare-its-reliance-on-msi-domains.patch

@@ -0,0 +1,34 @@
+From 9ec37efb87832b578d7972fc80b04d94f5d2bbe3 Mon Sep 17 00:00:00 2001
+From: Marc Zyngier <[email protected]>
+Date: Tue, 30 Mar 2021 16:11:42 +0100
+Subject: PCI/MSI: Make pci_host_common_probe() declare its reliance on MSI
+ domains
+
+The generic PCI host driver relies on MSI domains for MSIs to
+be provided to its end-points. Make this dependency explicit.
+
+This cures the warnings occuring on arm/arm64 VMs when booted
+with PCI virtio devices and no MSI controller (no GICv3 ITS,
+for example).
+
+It is likely that other drivers will need to express the same
+dependency.
+
+Link: https://lore.kernel.org/r/[email protected]
+Signed-off-by: Marc Zyngier <[email protected]>
+Signed-off-by: Lorenzo Pieralisi <[email protected]>
+Acked-by: Bjorn Helgaas <[email protected]>
+---
+ drivers/pci/controller/pci-host-common.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/drivers/pci/controller/pci-host-common.c
++++ b/drivers/pci/controller/pci-host-common.c
+@@ -77,6 +77,7 @@ int pci_host_common_probe(struct platfor
+ 
+ 	bridge->sysdata = cfg;
+ 	bridge->ops = (struct pci_ops *)&ops->pci_ops;
++	bridge->msi_domain = true;
+ 
+ 	platform_set_drvdata(pdev, bridge);
+ 

target/linux/generic/backport-5.10/821-v5.13-let-pci-host-bridges-declar-their-reliance-on-msi-domains.patch

@@ -0,0 +1,44 @@
+From 94e89b145371b68fa0ea294855adebcd03e0522e Mon Sep 17 00:00:00 2001
+From: Marc Zyngier <[email protected]>
+Date: Tue, 30 Mar 2021 16:11:41 +0100
+Subject: PCI/MSI: Let PCI host bridges declare their reliance on MSI domains
+
+There is a whole class of host bridges that cannot know whether
+MSIs will be provided or not, as they rely on other blocks
+to provide the MSI functionnality, using MSI domains.  This is
+the case for example on systems that use the ARM GIC architecture.
+
+Introduce a new attribute ('msi_domain') indicating that implicit
+dependency, and use this property to set the NO_MSI flag when
+no MSI domain is found at probe time.
+
+Link: https://lore.kernel.org/r/[email protected]
+Signed-off-by: Marc Zyngier <[email protected]>
+Signed-off-by: Lorenzo Pieralisi <[email protected]>
+Acked-by: Bjorn Helgaas <[email protected]>
+---
+ drivers/pci/probe.c | 2 ++
+ include/linux/pci.h | 1 +
+ 2 files changed, 3 insertions(+)
+
+--- a/drivers/pci/probe.c
++++ b/drivers/pci/probe.c
+@@ -925,6 +925,8 @@ static int pci_register_host_bridge(stru
+ 	device_enable_async_suspend(bus->bridge);
+ 	pci_set_bus_of_node(bus);
+ 	pci_set_bus_msi_domain(bus);
++	if (bridge->msi_domain && !dev_get_msi_domain(&bus->dev))
++		bus->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
+ 
+ 	if (!parent)
+ 		set_dev_node(bus->bridge, pcibus_to_node(bus));
+--- a/include/linux/pci.h
++++ b/include/linux/pci.h
+@@ -545,6 +545,7 @@ struct pci_host_bridge {
+ 	unsigned int	native_dpc:1;		/* OS may use PCIe DPC */
+ 	unsigned int	preserve_config:1;	/* Preserve FW resource setup */
+ 	unsigned int	size_windows:1;		/* Enable root bus sizing */
++	unsigned int	msi_domain:1;		/* Bridge wants MSI domain */
+ 
+ 	/* Resource alignment requirements */
+ 	resource_size_t (*align_resource)(struct pci_dev *dev,

target/linux/generic/backport-5.10/822-v5.13-advertise-lack-of-built-in-msi-handling.patch

@@ -0,0 +1,59 @@
+From 645e9c38383d7fcde2784ee537fa18ec9bed54d9 Mon Sep 17 00:00:00 2001
+From: Thomas Gleixner <[email protected]>
+Date: Tue, 30 Mar 2021 16:11:43 +0100
+Subject: PCI: mediatek: Advertise lack of built-in MSI handling
+
+Some Mediatek host bridges cannot handle MSIs, which is sad.
+This also results in an ugly warning at device probe time,
+as the core PCI code wasn't told that MSIs were not available.
+
+Advertise this fact to the rest of the core PCI code by
+using the 'msi_domain' attribute, which still opens the possibility
+for another block to provide the MSI functionnality.
+
+[maz: commit message, switched over to msi_domain attribute]
+
+Link: https://lore.kernel.org/r/[email protected]
+Reported-by: Frank Wunderlich <[email protected]>
+Signed-off-by: Thomas Gleixner <[email protected]>
+Signed-off-by: Marc Zyngier <[email protected]>
+Signed-off-by: Lorenzo Pieralisi <[email protected]>
+Acked-by: Bjorn Helgaas <[email protected]>
+---
+ drivers/pci/controller/pcie-mediatek.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+--- a/drivers/pci/controller/pcie-mediatek.c
++++ b/drivers/pci/controller/pcie-mediatek.c
+@@ -143,6 +143,7 @@ struct mtk_pcie_port;
+  * struct mtk_pcie_soc - differentiate between host generations
+  * @need_fix_class_id: whether this host's class ID needed to be fixed or not
+  * @need_fix_device_id: whether this host's device ID needed to be fixed or not
++ * @no_msi: Bridge has no MSI support, and relies on an external block
+  * @device_id: device ID which this host need to be fixed
+  * @ops: pointer to configuration access functions
+  * @startup: pointer to controller setting functions
+@@ -151,6 +152,7 @@ struct mtk_pcie_port;
+ struct mtk_pcie_soc {
+ 	bool need_fix_class_id;
+ 	bool need_fix_device_id;
++	bool no_msi;
+ 	unsigned int device_id;
+ 	struct pci_ops *ops;
+ 	int (*startup)(struct mtk_pcie_port *port);
+@@ -1087,6 +1089,7 @@ static int mtk_pcie_probe(struct platfor
+ 
+ 	host->ops = pcie->soc->ops;
+ 	host->sysdata = pcie;
++	host->msi_domain = pcie->soc->no_msi;
+ 
+ 	err = pci_host_probe(host);
+ 	if (err)
+@@ -1176,6 +1179,7 @@ static const struct dev_pm_ops mtk_pcie_
+ };
+ 
+ static const struct mtk_pcie_soc mtk_pcie_soc_v1 = {
++	.no_msi = true,
+ 	.ops = &mtk_pcie_ops,
+ 	.startup = mtk_pcie_startup_port,
+ };

target/linux/mediatek/patches-5.10/000-spi-fix-fifo.patch

@@ -18,11 +18,9 @@ Signed-off-by: Mark Brown <[email protected]>
  drivers/spi/spi-mt65xx.c | 16 +++++++++++++---
  1 file changed, 13 insertions(+), 3 deletions(-)
 
-diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
-index 976f73b9e2998..8d5fa7f1e5069 100644
 --- a/drivers/spi/spi-mt65xx.c
 +++ b/drivers/spi/spi-mt65xx.c
-@@ -427,13 +427,23 @@ static int mtk_spi_fifo_transfer(struct spi_master *master,
+@@ -434,13 +434,23 @@ static int mtk_spi_fifo_transfer(struct
  	mtk_spi_setup_packet(master);
  
  	cnt = xfer->len / 4;
@@ -49,6 +47,3 @@ index 976f73b9e2998..8d5fa7f1e5069 100644
  	}
  
  	mtk_spi_enable_transfer(master);
--- 
-cgit 1.2.3-1.el7
-

target/linux/mediatek/patches-5.10/330-mtk-bmt-support.patch

@@ -815,7 +815,7 @@
  
  static int spinand_read_reg_op(struct spinand_device *spinand, u8 reg, u8 *val)
  {
-@@ -1139,6 +1140,8 @@ static int spinand_probe(struct spi_mem
+@@ -1140,6 +1141,8 @@ static int spinand_probe(struct spi_mem
  	if (ret)
  		return ret;
  
@@ -824,7 +824,7 @@
  	ret = mtd_device_register(mtd, NULL, 0);
  	if (ret)
  		goto err_spinand_cleanup;
-@@ -1164,6 +1167,7 @@ static int spinand_remove(struct spi_mem
+@@ -1165,6 +1168,7 @@ static int spinand_remove(struct spi_mem
  	if (ret)
  		return ret;
  

target/linux/mediatek/patches-5.10/510-net-mediatek-add-flow-offload-for-mt7623.patch

@@ -14,7 +14,7 @@ Signed-off-by: Frank Wunderlich <[email protected]>
 
 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
-@@ -3272,6 +3272,7 @@ static const struct mtk_soc_data mt7623_
+@@ -3274,6 +3274,7 @@ static const struct mtk_soc_data mt7623_
  	.hw_features = MTK_HW_FEATURES,
  	.required_clks = MT7623_CLKS_BITMAP,
  	.required_pctl = true,

target/linux/mediatek/patches-5.10/601-PCI-mediatek-Use-regmap-to-get-shared-pcie-cfg-base.patch

@@ -150,7 +150,7 @@ Signed-off-by: chuanjia.liu <[email protected]>
  #include <linux/reset.h>
  
  #include "../pci.h"
-@@ -205,6 +207,7 @@ struct mtk_pcie_port {
+@@ -207,6 +209,7 @@ struct mtk_pcie_port {
   * struct mtk_pcie - PCIe host information
   * @dev: pointer to PCIe device
   * @base: IO mapped register base
@@ -158,7 +158,7 @@ Signed-off-by: chuanjia.liu <[email protected]>
   * @free_ck: free-run reference clock
   * @mem: non-prefetchable memory resource
   * @ports: pointer to PCIe port information
-@@ -213,6 +216,7 @@ struct mtk_pcie_port {
+@@ -215,6 +218,7 @@ struct mtk_pcie_port {
  struct mtk_pcie {
  	struct device *dev;
  	void __iomem *base;
@@ -166,7 +166,7 @@ Signed-off-by: chuanjia.liu <[email protected]>
  	struct clk *free_ck;
  
  	struct list_head ports;
-@@ -648,7 +652,7 @@ static int mtk_pcie_setup_irq(struct mtk
+@@ -650,7 +654,7 @@ static int mtk_pcie_setup_irq(struct mtk
  		return err;
  	}
  
@@ -175,7 +175,7 @@ Signed-off-by: chuanjia.liu <[email protected]>
  	if (port->irq < 0)
  		return port->irq;
  
-@@ -674,12 +678,11 @@ static int mtk_pcie_startup_port_v2(stru
+@@ -676,12 +680,11 @@ static int mtk_pcie_startup_port_v2(stru
  	if (!mem)
  		return -EINVAL;
  
@@ -193,7 +193,7 @@ Signed-off-by: chuanjia.liu <[email protected]>
  	}
  
  	/* Assert all reset signals */
-@@ -983,6 +986,7 @@ static int mtk_pcie_subsys_powerup(struc
+@@ -985,6 +988,7 @@ static int mtk_pcie_subsys_powerup(struc
  	struct device *dev = pcie->dev;
  	struct platform_device *pdev = to_platform_device(dev);
  	struct resource *regs;
@@ -201,7 +201,7 @@ Signed-off-by: chuanjia.liu <[email protected]>
  	int err;
  
  	/* get shared registers, which are optional */
-@@ -995,6 +999,13 @@ static int mtk_pcie_subsys_powerup(struc
+@@ -997,6 +1001,13 @@ static int mtk_pcie_subsys_powerup(struc
  		}
  	}
  

target/linux/mediatek/patches-5.10/610-pcie-mediatek-fix-clearing-interrupt-status.patch

@@ -10,7 +10,7 @@ Signed-off-by: Felix Fietkau <[email protected]>
 
 --- a/drivers/pci/controller/pcie-mediatek.c
 +++ b/drivers/pci/controller/pcie-mediatek.c
-@@ -613,10 +613,10 @@ static void mtk_pcie_intr_handler(struct
+@@ -615,10 +615,10 @@ static void mtk_pcie_intr_handler(struct
  	if (status & INTX_MASK) {
  		for_each_set_bit_from(bit, &status, PCI_NUM_INTX + INTX_SHIFT) {
  			/* Clear the INTx */

target/linux/mediatek/patches-5.10/700-net-ethernet-mtk_eth_soc-add-support-for-coherent-DM.patch

@@ -51,7 +51,7 @@ Signed-off-by: Felix Fietkau <[email protected]>
  	if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) {
  		ret = device_reset(eth->dev);
  		if (ret) {
-@@ -3074,6 +3082,16 @@ static int mtk_probe(struct platform_dev
+@@ -3076,6 +3084,16 @@ static int mtk_probe(struct platform_dev
  		}
  	}
  

target/linux/mediatek/patches-5.10/710-pci-pcie-mediatek-add-support-for-coherent-DMA.patch

@@ -78,7 +78,7 @@ Signed-off-by: Felix Fietkau <[email protected]>
  struct mtk_pcie_port;
  
  /**
-@@ -1040,6 +1046,27 @@ static int mtk_pcie_setup(struct mtk_pci
+@@ -1042,6 +1048,27 @@ static int mtk_pcie_setup(struct mtk_pci
  	struct mtk_pcie_port *port, *tmp;
  	int err;