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/Linux-v5.10/Documentation/devicetree/bindings/interrupt-controller/
Dloongson,pch-msi.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: "http://devicetree.org/schemas/interrupt-controller/loongson,pch-msi.yaml#"
5 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
7 title: Loongson PCH MSI Controller
10 - Jiaxun Yang <jiaxun.yang@flygoat.com>
14 transforming interrupts from PCIe MSI into HyperTransport vectorized
19 const: loongson,pch-msi-1.0
24 loongson,msi-base-vec:
27 to PCH MSI.
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/Linux-v5.10/arch/mips/boot/dts/loongson/
Dloongson64c_4core_ls7a.dts1 // SPDX-License-Identifier: GPL-2.0
3 /dts-v1/;
5 #include "loongson64c-package.dtsi"
6 #include "ls7a-pch.dtsi"
9 compatible = "loongson,loongson64c-4core-ls7a";
13 htvec: interrupt-controller@efdfb000080 {
14 compatible = "loongson,htvec-1.0";
16 interrupt-controller;
17 #interrupt-cells = <1>;
19 interrupt-parent = <&liointc>;
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Dloongson64g_4core_ls7a.dts1 // SPDX-License-Identifier: GPL-2.0
3 /dts-v1/;
5 #include "loongson64g-package.dtsi"
6 #include "ls7a-pch.dtsi"
9 compatible = "loongson,loongson64g-4core-ls7a";
13 htvec: interrupt-controller@efdfb000080 {
14 compatible = "loongson,htvec-1.0";
16 interrupt-controller;
17 #interrupt-cells = <1>;
19 interrupt-parent = <&liointc>;
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/Linux-v5.10/drivers/irqchip/
Dirq-loongson-pch-msi.c1 // SPDX-License-Identifier: GPL-2.0
4 * Loongson PCH MSI support
7 #define pr_fmt(fmt) "pch-msi: " fmt
10 #include <linux/msi.h>
39 .name = "PCH PCI MSI",
50 mutex_lock(&priv->msi_map_lock); in pch_msi_allocate_hwirq()
52 first = bitmap_find_free_region(priv->msi_map, priv->num_irqs, in pch_msi_allocate_hwirq()
55 mutex_unlock(&priv->msi_map_lock); in pch_msi_allocate_hwirq()
56 return -ENOSPC; in pch_msi_allocate_hwirq()
59 mutex_unlock(&priv->msi_map_lock); in pch_msi_allocate_hwirq()
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