[PATCH 1/9] irqchip/ls-scfg-msi: fix typo of MSI compatible strings

[PATCH 1/9] irqchip/ls-scfg-msi: fix typo of MSI compatible strings

[Minghuan Lian]

The patch is to fix typo of the Layerscape SCFG MSI dts compatible
strings. "1" is replaced by "l".

Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
---
 .../devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt    | 6 +++---
 drivers/irqchip/irq-ls-scfg-msi.c                                   | 6 ++++--
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt b/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt
index 9e38949..2755cd1 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt
@@ -4,8 +4,8 @@ Required properties:
 
 - compatible: should be "fsl,<soc-name>-msi" to identify
 	      Layerscape PCIe MSI controller block such as:
-              "fsl,1s1021a-msi"
-              "fsl,1s1043a-msi"
+              "fsl,ls1021a-msi"
+              "fsl,ls1043a-msi"
 - msi-controller: indicates that this is a PCIe MSI controller node
 - reg: physical base address of the controller and length of memory mapped.
 - interrupts: an interrupt to the parent interrupt controller.
@@ -23,7 +23,7 @@ MSI controller node
 Examples:
 
 	msi1: msi-controller@1571000 {
-		compatible = "fsl,1s1043a-msi";
+		compatible = "fsl,ls1043a-msi";
 		reg = <0x0 0x1571000 0x0 0x8>,
 		msi-controller;
 		interrupts = <0 116 0x4>;
diff --git a/drivers/irqchip/irq-ls-scfg-msi.c b/drivers/irqchip/irq-ls-scfg-msi.c
index 02cca74c..cef67cc 100644
--- a/drivers/irqchip/irq-ls-scfg-msi.c
+++ b/drivers/irqchip/irq-ls-scfg-msi.c
@@ -219,8 +219,10 @@ static int ls_scfg_msi_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id ls_scfg_msi_id[] = {
-	{ .compatible = "fsl,1s1021a-msi", },
-	{ .compatible = "fsl,1s1043a-msi", },
+	{ .compatible = "fsl,1s1021a-msi", }, /* a typo */
+	{ .compatible = "fsl,1s1043a-msi", }, /* a typo */
+	{ .compatible = "fsl,ls1021a-msi", },
+	{ .compatible = "fsl,ls1043a-msi", },
 	{},
 };
 
-- 
1.9.1

[PATCH 2/9] arm: dts: ls1021a: fix typo of MSI compatible string

[Minghuan Lian]

"1" should be replaced by "l". This is a typo.
The patch is to fix it.

Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
---
 arch/arm/boot/dts/ls1021a.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/ls1021a.dtsi b/arch/arm/boot/dts/ls1021a.dtsi
index 282d854..6651938 100644
--- a/arch/arm/boot/dts/ls1021a.dtsi
+++ b/arch/arm/boot/dts/ls1021a.dtsi
@@ -122,14 +122,14 @@
 		};
 
 		msi1: msi-controller@1570e00 {
-			compatible = "fsl,1s1021a-msi";
+			compatible = "fsl,ls1021a-msi";
 			reg = <0x0 0x1570e00 0x0 0x8>;
 			msi-controller;
 			interrupts =  <GIC_SPI 179 IRQ_TYPE_LEVEL_HIGH>;
 		};
 
 		msi2: msi-controller@1570e08 {
-			compatible = "fsl,1s1021a-msi";
+			compatible = "fsl,ls1021a-msi";
 			reg = <0x0 0x1570e08 0x0 0x8>;
 			msi-controller;
 			interrupts = <GIC_SPI 180 IRQ_TYPE_LEVEL_HIGH>;
-- 
1.9.1

[PATCH 3/9] arm64: dts: ls1043a: fix typo of MSI compatible string

[Minghuan Lian]

"1" should be replaced by "l". This is a typo.
The patch is to fix it.

Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
---
 arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi
index ec13a6e..692fc35 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi
@@ -589,21 +589,21 @@
 		};
 
 		msi1: msi-controller1@1571000 {
-			compatible = "fsl,1s1043a-msi";
+			compatible = "fsl,ls1043a-msi";
 			reg = <0x0 0x1571000 0x0 0x8>;
 			msi-controller;
 			interrupts = <0 116 0x4>;
 		};
 
 		msi2: msi-controller2@1572000 {
-			compatible = "fsl,1s1043a-msi";
+			compatible = "fsl,ls1043a-msi";
 			reg = <0x0 0x1572000 0x0 0x8>;
 			msi-controller;
 			interrupts = <0 126 0x4>;
 		};
 
 		msi3: msi-controller3@1573000 {
-			compatible = "fsl,1s1043a-msi";
+			compatible = "fsl,ls1043a-msi";
 			reg = <0x0 0x1573000 0x0 0x8>;
 			msi-controller;
 			interrupts = <0 160 0x4>;
-- 
1.9.1

[PATCH 4/9] arm: dts: ls1021a: share all MSIs

[Minghuan Lian]

In order to maximize the use of MSI, a PCIe controller will share
all MSI controllers. The patch changes msi-parent to refer to all
MSI controller dts nodes.

Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
---
 arch/arm/boot/dts/ls1021a.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/ls1021a.dtsi b/arch/arm/boot/dts/ls1021a.dtsi
index 6651938..1c82024 100644
--- a/arch/arm/boot/dts/ls1021a.dtsi
+++ b/arch/arm/boot/dts/ls1021a.dtsi
@@ -723,7 +723,7 @@
 			bus-range = <0x0 0xff>;
 			ranges = <0x81000000 0x0 0x00000000 0x40 0x00010000 0x0 0x00010000   /* downstream I/O */
 				  0x82000000 0x0 0x40000000 0x40 0x40000000 0x0 0x40000000>; /* non-prefetchable memory */
-			msi-parent = <&msi1>;
+			msi-parent = <&msi1>, <&msi2>;
 			#interrupt-cells = <1>;
 			interrupt-map-mask = <0 0 0 7>;
 			interrupt-map = <0000 0 0 1 &gic GIC_SPI 91  IRQ_TYPE_LEVEL_HIGH>,
@@ -746,7 +746,7 @@
 			bus-range = <0x0 0xff>;
 			ranges = <0x81000000 0x0 0x00000000 0x48 0x00010000 0x0 0x00010000   /* downstream I/O */
 				  0x82000000 0x0 0x40000000 0x48 0x40000000 0x0 0x40000000>; /* non-prefetchable memory */
-			msi-parent = <&msi2>;
+			msi-parent = <&msi1>, <&msi2>;
 			#interrupt-cells = <1>;
 			interrupt-map-mask = <0 0 0 7>;
 			interrupt-map = <0000 0 0 1 &gic GIC_SPI 92  IRQ_TYPE_LEVEL_HIGH>,
-- 
1.9.1

[PATCH 5/9] arm64: dts: ls1043a: share all MSIs

[Minghuan Lian]

In order to maximize the use of MSI, a PCIe controller will share
all MSI controllers. The patch changes "msi-parent" to refer to all
MSI controller dts nodes.

Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
---
 arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi
index 692fc35..3947220 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi
@@ -625,7 +625,7 @@
 			bus-range = <0x0 0xff>;
 			ranges = <0x81000000 0x0 0x00000000 0x40 0x00010000 0x0 0x00010000   /* downstream I/O */
 				  0x82000000 0x0 0x40000000 0x40 0x40000000 0x0 0x40000000>; /* non-prefetchable memory */
-			msi-parent = <&msi1>;
+			msi-parent = <&msi1>, <&msi2>, <&msi3>;
 			#interrupt-cells = <1>;
 			interrupt-map-mask = <0 0 0 7>;
 			interrupt-map = <0000 0 0 1 &gic 0 110 0x4>,
@@ -650,7 +650,7 @@
 			bus-range = <0x0 0xff>;
 			ranges = <0x81000000 0x0 0x00000000 0x48 0x00010000 0x0 0x00010000   /* downstream I/O */
 				  0x82000000 0x0 0x40000000 0x48 0x40000000 0x0 0x40000000>; /* non-prefetchable memory */
-			msi-parent = <&msi2>;
+			msi-parent = <&msi1>, <&msi2>, <&msi3>;
 			#interrupt-cells = <1>;
 			interrupt-map-mask = <0 0 0 7>;
 			interrupt-map = <0000 0 0 1 &gic 0 120  0x4>,
@@ -675,7 +675,7 @@
 			bus-range = <0x0 0xff>;
 			ranges = <0x81000000 0x0 0x00000000 0x50 0x00010000 0x0 0x00010000   /* downstream I/O */
 				  0x82000000 0x0 0x40000000 0x50 0x40000000 0x0 0x40000000>; /* non-prefetchable memory */
-			msi-parent = <&msi3>;
+			msi-parent = <&msi1>, <&msi2>, <&msi3>;
 			#interrupt-cells = <1>;
 			interrupt-map-mask = <0 0 0 7>;
 			interrupt-map = <0000 0 0 1 &gic 0 154 0x4>,
-- 
1.9.1

[PATCH 6/9] arm64: dts: ls1046a: add MSI dts node

[Minghuan Lian]

LS1046a includes 3 MSI controllers.
Each controller supports 128 interrupts.

Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
---
 .../interrupt-controller/fsl,ls-scfg-msi.txt       |  1 +
 arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi     | 31 ++++++++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt b/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt
index 2755cd1..54597b0 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt
@@ -6,6 +6,7 @@ Required properties:
 	      Layerscape PCIe MSI controller block such as:
               "fsl,ls1021a-msi"
               "fsl,ls1043a-msi"
+	      "fsl,ls1046a-msi"
 - msi-controller: indicates that this is a PCIe MSI controller node
 - reg: physical base address of the controller and length of memory mapped.
 - interrupts: an interrupt to the parent interrupt controller.
diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi
index 38806ca..49dbafc 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi
@@ -511,5 +511,36 @@
 			interrupts = <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&clockgen 4 1>;
 		};
+
+		msi1: msi-controller@1580000 {
+			compatible = "fsl,ls1046a-msi";
+			msi-controller;
+			reg = <0x0 0x1580000 0x0 0x10000>;
+			interrupts = <GIC_SPI 116 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 112 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH>;
+		};
+
+		msi2: msi-controller@1590000 {
+			compatible = "fsl,ls1046a-msi";
+			msi-controller;
+			reg = <0x0 0x1590000 0x0 0x10000>;
+			interrupts = <GIC_SPI 126 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>;
+		};
+
+		msi3: msi-controller@15a0000 {
+			compatible = "fsl,ls1046a-msi";
+			msi-controller;
+			reg = <0x0 0x15a0000 0x0 0x10000>;
+			interrupts = <GIC_SPI 160 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 155 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 156 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 157 IRQ_TYPE_LEVEL_HIGH>;
+		};
+
 	};
 };
-- 
1.9.1

Re: [PATCH 6/9] arm64: dts: ls1046a: add MSI dts node

[Rob Herring]

On Tue, Dec 27, 2016 at 05:13:02PM +0800, Minghuan Lian wrote:
> LS1046a includes 3 MSI controllers.
> Each controller supports 128 interrupts.
> 
> Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
> ---
>  .../interrupt-controller/fsl,ls-scfg-msi.txt       |  1 +
>  arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi     | 31 ++++++++++++++++++++++
>  2 files changed, 32 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt b/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt
> index 2755cd1..54597b0 100644
> --- a/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt
> +++ b/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt
> @@ -6,6 +6,7 @@ Required properties:
>  	      Layerscape PCIe MSI controller block such as:
>                "fsl,ls1021a-msi"
>                "fsl,ls1043a-msi"
> +	      "fsl,ls1046a-msi"

Differing whitespace.

Otherwise,

Acked-by: Rob Herring <robh@kernel.org> 

RE: [PATCH 6/9] arm64: dts: ls1046a: add MSI dts node

[M.H. Lian]

Hi Rob,

Thanks for your comment.
I will change whitespace.

Thanks,
Minghuan

> -----Original Message-----
> From: Rob Herring [mailto:robh@kernel.org]
> Sent: Wednesday, January 04, 2017 1:13 AM
> To: M.H. Lian <minghuan.lian@nxp.com>
> Cc: linux-arm-kernel@lists.infradead.org; linux-kernel@vger.kernel.org;
> devicetree@vger.kernel.org; Marc Zyngier <marc.zyngier@arm.com>; Jason
> Cooper <jason@lakedaemon.net>; Roy Zang <roy.zang@nxp.com>; Mingkai
> Hu <mingkai.hu@nxp.com>; Stuart Yoder <stuart.yoder@nxp.com>; Leo Li
> <leoyang.li@nxp.com>; Scott Wood <scott.wood@nxp.com>
> Subject: Re: [PATCH 6/9] arm64: dts: ls1046a: add MSI dts node
> 
> On Tue, Dec 27, 2016 at 05:13:02PM +0800, Minghuan Lian wrote:
> > LS1046a includes 3 MSI controllers.
> > Each controller supports 128 interrupts.
> >
> > Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
> > ---
> >  .../interrupt-controller/fsl,ls-scfg-msi.txt       |  1 +
> >  arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi     | 31
> ++++++++++++++++++++++
> >  2 files changed, 32 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-
> scfg-msi.txt b/Documentation/devicetree/bindings/interrupt-
> controller/fsl,ls-scfg-msi.txt
> > index 2755cd1..54597b0 100644
> > --- a/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-
> msi.txt
> > +++ b/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-
> msi.txt
> > @@ -6,6 +6,7 @@ Required properties:
> >  	      Layerscape PCIe MSI controller block such as:
> >                "fsl,ls1021a-msi"
> >                "fsl,ls1043a-msi"
> > +	      "fsl,ls1046a-msi"
> 
> Differing whitespace.
> 
> Otherwise,
> 
> Acked-by: Rob Herring <robh@kernel.org>

[PATCH 7/9] irqchip/ls-scfg-msi: add LS1046a MSI support

[Minghuan Lian]

LS1046a includes 4 MSIRs, each MSIR is assigned a dedicate GIC
SPI interrupt and provides 32 MSI interrupts. Compared to previous
MSI, LS1046a's IBS(interrupt bit select) shift is changed to 2 and
total MSI interrupt number is changed to 128.

The patch adds structure 'ls_scfg_msir' to describe MSIR setting and
'ibs_shift' to store the different value between the SoCs.

Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
---
 .../interrupt-controller/fsl,ls-scfg-msi.txt       |   2 +-
 drivers/irqchip/irq-ls-scfg-msi.c                  | 161 ++++++++++++++++-----
 2 files changed, 127 insertions(+), 36 deletions(-)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt b/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt
index 54597b0..dde4552 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt
@@ -6,7 +6,7 @@ Required properties:
 	      Layerscape PCIe MSI controller block such as:
               "fsl,ls1021a-msi"
               "fsl,ls1043a-msi"
-	      "fsl,ls1046a-msi"
+              "fsl,ls1046a-msi"
 - msi-controller: indicates that this is a PCIe MSI controller node
 - reg: physical base address of the controller and length of memory mapped.
 - interrupts: an interrupt to the parent interrupt controller.
diff --git a/drivers/irqchip/irq-ls-scfg-msi.c b/drivers/irqchip/irq-ls-scfg-msi.c
index cef67cc..67547bd 100644
--- a/drivers/irqchip/irq-ls-scfg-msi.c
+++ b/drivers/irqchip/irq-ls-scfg-msi.c
@@ -17,13 +17,24 @@
 #include <linux/irq.h>
 #include <linux/irqchip/chained_irq.h>
 #include <linux/irqdomain.h>
+#include <linux/of_irq.h>
 #include <linux/of_pci.h>
 #include <linux/of_platform.h>
 #include <linux/spinlock.h>
 
-#define MSI_MAX_IRQS	32
-#define MSI_IBS_SHIFT	3
-#define MSIR		4
+#define MSI_IRQS_PER_MSIR	32
+#define MSI_MSIR_OFFSET		4
+
+struct ls_scfg_msi_cfg {
+	u32 ibs_shift; /* Shift of interrupt bit select */
+};
+
+struct ls_scfg_msir {
+	struct ls_scfg_msi *msi_data;
+	unsigned int index;
+	unsigned int gic_irq;
+	void __iomem *reg;
+};
 
 struct ls_scfg_msi {
 	spinlock_t		lock;
@@ -32,8 +43,11 @@ struct ls_scfg_msi {
 	struct irq_domain	*msi_domain;
 	void __iomem		*regs;
 	phys_addr_t		msiir_addr;
-	int			irq;
-	DECLARE_BITMAP(used, MSI_MAX_IRQS);
+	struct ls_scfg_msi_cfg	*cfg;
+	u32			msir_num;
+	struct ls_scfg_msir	*msir;
+	u32			irqs_num;
+	unsigned long		*used;
 };
 
 static struct irq_chip ls_scfg_msi_irq_chip = {
@@ -55,7 +69,7 @@ static void ls_scfg_msi_compose_msg(struct irq_data *data, struct msi_msg *msg)
 
 	msg->address_hi = upper_32_bits(msi_data->msiir_addr);
 	msg->address_lo = lower_32_bits(msi_data->msiir_addr);
-	msg->data = data->hwirq << MSI_IBS_SHIFT;
+	msg->data = data->hwirq;
 }
 
 static int ls_scfg_msi_set_affinity(struct irq_data *irq_data,
@@ -81,8 +95,8 @@ static int ls_scfg_msi_domain_irq_alloc(struct irq_domain *domain,
 	WARN_ON(nr_irqs != 1);
 
 	spin_lock(&msi_data->lock);
-	pos = find_first_zero_bit(msi_data->used, MSI_MAX_IRQS);
-	if (pos < MSI_MAX_IRQS)
+	pos = find_first_zero_bit(msi_data->used, msi_data->irqs_num);
+	if (pos < msi_data->irqs_num)
 		__set_bit(pos, msi_data->used);
 	else
 		err = -ENOSPC;
@@ -106,7 +120,7 @@ static void ls_scfg_msi_domain_irq_free(struct irq_domain *domain,
 	int pos;
 
 	pos = d->hwirq;
-	if (pos < 0 || pos >= MSI_MAX_IRQS) {
+	if (pos < 0 || pos >= msi_data->irqs_num) {
 		pr_err("failed to teardown msi. Invalid hwirq %d\n", pos);
 		return;
 	}
@@ -123,15 +137,17 @@ static void ls_scfg_msi_domain_irq_free(struct irq_domain *domain,
 
 static void ls_scfg_msi_irq_handler(struct irq_desc *desc)
 {
-	struct ls_scfg_msi *msi_data = irq_desc_get_handler_data(desc);
+	struct ls_scfg_msir *msir = irq_desc_get_handler_data(desc);
+	struct ls_scfg_msi *msi_data = msir->msi_data;
 	unsigned long val;
-	int pos, virq;
+	int pos, virq, hwirq;
 
 	chained_irq_enter(irq_desc_get_chip(desc), desc);
 
-	val = ioread32be(msi_data->regs + MSIR);
-	for_each_set_bit(pos, &val, MSI_MAX_IRQS) {
-		virq = irq_find_mapping(msi_data->parent, (31 - pos));
+	val = ioread32be(msir->reg);
+	for_each_set_bit(pos, &val, MSI_IRQS_PER_MSIR) {
+		hwirq = ((31 - pos) << msi_data->cfg->ibs_shift) | msir->index;
+		virq = irq_find_mapping(msi_data->parent, hwirq);
 		if (virq)
 			generic_handle_irq(virq);
 	}
@@ -143,7 +159,7 @@ static int ls_scfg_msi_domains_init(struct ls_scfg_msi *msi_data)
 {
 	/* Initialize MSI domain parent */
 	msi_data->parent = irq_domain_add_linear(NULL,
-						 MSI_MAX_IRQS,
+						 msi_data->irqs_num,
 						 &ls_scfg_msi_domain_ops,
 						 msi_data);
 	if (!msi_data->parent) {
@@ -164,16 +180,83 @@ static int ls_scfg_msi_domains_init(struct ls_scfg_msi *msi_data)
 	return 0;
 }
 
+static int ls_scfg_msi_setup_hwirq(struct ls_scfg_msi *msi_data, int index)
+{
+	struct ls_scfg_msir *msir;
+	int virq, i, hwirq;
+
+	virq = platform_get_irq(msi_data->pdev, index);
+	if (virq <= 0)
+		return -ENODEV;
+
+	msir = &msi_data->msir[index];
+	msir->index = index;
+	msir->msi_data = msi_data;
+	msir->gic_irq = virq;
+	msir->reg = msi_data->regs + MSI_MSIR_OFFSET + 4 * index;
+
+	irq_set_chained_handler_and_data(msir->gic_irq,
+					 ls_scfg_msi_irq_handler,
+					 msir);
+
+	/* Release the hwirqs corresponding to this MSIR */
+	for (i = 0; i < MSI_IRQS_PER_MSIR; i++) {
+		hwirq = i << msi_data->cfg->ibs_shift | msir->index;
+		bitmap_clear(msi_data->used, hwirq, 1);
+	}
+
+	return 0;
+}
+
+static int ls_scfg_msi_teardown_hwirq(struct ls_scfg_msir *msir)
+{
+	struct ls_scfg_msi *msi_data = msir->msi_data;
+	int i, hwirq;
+
+	if (msir->gic_irq > 0)
+		irq_set_chained_handler_and_data(msir->gic_irq, NULL, NULL);
+
+	for (i = 0; i < MSI_IRQS_PER_MSIR; i++) {
+		hwirq = i << msi_data->cfg->ibs_shift | msir->index;
+		bitmap_set(msi_data->used, hwirq, 1);
+	}
+
+	return 0;
+}
+
+static struct ls_scfg_msi_cfg ls1021_msi_cfg = {
+	.ibs_shift = 3,
+};
+
+static struct ls_scfg_msi_cfg ls1046_msi_cfg = {
+	.ibs_shift = 2,
+};
+
+static const struct of_device_id ls_scfg_msi_id[] = {
+	{ .compatible = "fsl,ls1021a-msi", .data = &ls1021_msi_cfg },
+	{ .compatible = "fsl,ls1043a-msi", .data = &ls1021_msi_cfg },
+	{ .compatible = "fsl,ls1046a-msi", .data = &ls1046_msi_cfg },
+	{},
+};
+MODULE_DEVICE_TABLE(of, ls_scfg_msi_id);
+
 static int ls_scfg_msi_probe(struct platform_device *pdev)
 {
+	const struct of_device_id *match;
 	struct ls_scfg_msi *msi_data;
 	struct resource *res;
-	int ret;
+	int i, ret;
+
+	match = of_match_device(ls_scfg_msi_id, &pdev->dev);
+	if (!match)
+		return -ENODEV;
 
 	msi_data = devm_kzalloc(&pdev->dev, sizeof(*msi_data), GFP_KERNEL);
 	if (!msi_data)
 		return -ENOMEM;
 
+	msi_data->cfg = (struct ls_scfg_msi_cfg *) match->data;
+
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	msi_data->regs = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(msi_data->regs)) {
@@ -182,23 +265,37 @@ static int ls_scfg_msi_probe(struct platform_device *pdev)
 	}
 	msi_data->msiir_addr = res->start;
 
-	msi_data->irq = platform_get_irq(pdev, 0);
-	if (msi_data->irq <= 0) {
-		dev_err(&pdev->dev, "failed to get MSI irq\n");
-		return -ENODEV;
-	}
-
 	msi_data->pdev = pdev;
 	spin_lock_init(&msi_data->lock);
 
+	msi_data->irqs_num = MSI_IRQS_PER_MSIR *
+			     (1 << msi_data->cfg->ibs_shift);
+	msi_data->used = devm_kcalloc(&pdev->dev,
+				    BITS_TO_LONGS(msi_data->irqs_num),
+				    sizeof(*msi_data->used),
+				    GFP_KERNEL);
+	if (!msi_data->used)
+		return -ENOMEM;
+	/*
+	 * Reserve all the hwirqs
+	 * The available hwirqs will be released in ls1_msi_setup_hwirq()
+	 */
+	bitmap_set(msi_data->used, 0, msi_data->irqs_num);
+
+	msi_data->msir_num = of_irq_count(pdev->dev.of_node);
+	msi_data->msir = devm_kcalloc(&pdev->dev, msi_data->msir_num,
+				      sizeof(*msi_data->msir),
+				      GFP_KERNEL);
+	if (!msi_data->msir)
+		return -ENOMEM;
+
+	for (i = 0; i < msi_data->msir_num; i++)
+		ls_scfg_msi_setup_hwirq(msi_data, i);
+
 	ret = ls_scfg_msi_domains_init(msi_data);
 	if (ret)
 		return ret;
 
-	irq_set_chained_handler_and_data(msi_data->irq,
-					 ls_scfg_msi_irq_handler,
-					 msi_data);
-
 	platform_set_drvdata(pdev, msi_data);
 
 	return 0;
@@ -207,8 +304,10 @@ static int ls_scfg_msi_probe(struct platform_device *pdev)
 static int ls_scfg_msi_remove(struct platform_device *pdev)
 {
 	struct ls_scfg_msi *msi_data = platform_get_drvdata(pdev);
+	int i;
 
-	irq_set_chained_handler_and_data(msi_data->irq, NULL, NULL);
+	for (i = 0; i < msi_data->msir_num; i++)
+		ls_scfg_msi_teardown_hwirq(&msi_data->msir[i]);
 
 	irq_domain_remove(msi_data->msi_domain);
 	irq_domain_remove(msi_data->parent);
@@ -218,14 +317,6 @@ static int ls_scfg_msi_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static const struct of_device_id ls_scfg_msi_id[] = {
-	{ .compatible = "fsl,1s1021a-msi", }, /* a typo */
-	{ .compatible = "fsl,1s1043a-msi", }, /* a typo */
-	{ .compatible = "fsl,ls1021a-msi", },
-	{ .compatible = "fsl,ls1043a-msi", },
-	{},
-};
-
 static struct platform_driver ls_scfg_msi_driver = {
 	.driver = {
 		.name = "ls-scfg-msi",
-- 
1.9.1

Re: [PATCH 7/9] irqchip/ls-scfg-msi: add LS1046a MSI support

[Rob Herring]

On Tue, Dec 27, 2016 at 05:13:03PM +0800, Minghuan Lian wrote:
> LS1046a includes 4 MSIRs, each MSIR is assigned a dedicate GIC
> SPI interrupt and provides 32 MSI interrupts. Compared to previous
> MSI, LS1046a's IBS(interrupt bit select) shift is changed to 2 and
> total MSI interrupt number is changed to 128.
> 
> The patch adds structure 'ls_scfg_msir' to describe MSIR setting and
> 'ibs_shift' to store the different value between the SoCs.
> 
> Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
> ---
>  .../interrupt-controller/fsl,ls-scfg-msi.txt       |   2 +-
>  drivers/irqchip/irq-ls-scfg-msi.c                  | 161 ++++++++++++++++-----
>  2 files changed, 127 insertions(+), 36 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt b/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt
> index 54597b0..dde4552 100644
> --- a/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt
> +++ b/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt
> @@ -6,7 +6,7 @@ Required properties:
>  	      Layerscape PCIe MSI controller block such as:
>                "fsl,ls1021a-msi"
>                "fsl,ls1043a-msi"
> -	      "fsl,ls1046a-msi"
> +              "fsl,ls1046a-msi"

This hunk goes in the previous patch...

>  - msi-controller: indicates that this is a PCIe MSI controller node
>  - reg: physical base address of the controller and length of memory mapped.
>  - interrupts: an interrupt to the parent interrupt controller.

[PATCH 8/9] irqchip/ls-scfg-msi: add LS1043a v1.1 MSI support

[Minghuan Lian]

A MSI controller of LS1043a v1.0 only includes one MSIR and
is assigned one GIC interrupt. In order to support affinity,
LS1043a v1.1 MSI is assigned 4 MSIRs and 4 GIC interrupts.
But the MSIR has the different offset and only supports 8 MSIs.
The bits between variable bit_start and bit_end in structure
ls_scfg_msir are used to show 8 MSI interrupts. msir_irqs and
msir_base are added to describe the difference of MSI between
LS1043a v1.1 and other SoCs.

Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
---
 .../interrupt-controller/fsl,ls-scfg-msi.txt       |  1 +
 drivers/irqchip/irq-ls-scfg-msi.c                  | 45 +++++++++++++++++++---
 2 files changed, 40 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt b/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt
index dde4552..49ccabb 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt
@@ -7,6 +7,7 @@ Required properties:
               "fsl,ls1021a-msi"
               "fsl,ls1043a-msi"
               "fsl,ls1046a-msi"
+              "fsl,ls1043a-v1.1-msi"
 - msi-controller: indicates that this is a PCIe MSI controller node
 - reg: physical base address of the controller and length of memory mapped.
 - interrupts: an interrupt to the parent interrupt controller.
diff --git a/drivers/irqchip/irq-ls-scfg-msi.c b/drivers/irqchip/irq-ls-scfg-msi.c
index 67547bd..dc19569 100644
--- a/drivers/irqchip/irq-ls-scfg-msi.c
+++ b/drivers/irqchip/irq-ls-scfg-msi.c
@@ -25,14 +25,21 @@
 #define MSI_IRQS_PER_MSIR	32
 #define MSI_MSIR_OFFSET		4
 
+#define MSI_LS1043V1_1_IRQS_PER_MSIR	8
+#define MSI_LS1043V1_1_MSIR_OFFSET	0x10
+
 struct ls_scfg_msi_cfg {
 	u32 ibs_shift; /* Shift of interrupt bit select */
+	u32 msir_irqs; /* The irq number per MSIR */
+	u32 msir_base; /* The base address of MSIR */
 };
 
 struct ls_scfg_msir {
 	struct ls_scfg_msi *msi_data;
 	unsigned int index;
 	unsigned int gic_irq;
+	unsigned int bit_start;
+	unsigned int bit_end;
 	void __iomem *reg;
 };
 
@@ -140,13 +147,18 @@ static void ls_scfg_msi_irq_handler(struct irq_desc *desc)
 	struct ls_scfg_msir *msir = irq_desc_get_handler_data(desc);
 	struct ls_scfg_msi *msi_data = msir->msi_data;
 	unsigned long val;
-	int pos, virq, hwirq;
+	int pos, size, virq, hwirq;
 
 	chained_irq_enter(irq_desc_get_chip(desc), desc);
 
 	val = ioread32be(msir->reg);
-	for_each_set_bit(pos, &val, MSI_IRQS_PER_MSIR) {
-		hwirq = ((31 - pos) << msi_data->cfg->ibs_shift) | msir->index;
+
+	pos = msir->bit_start;
+	size = msir->bit_end + 1;
+
+	for_each_set_bit_from(pos, &val, size) {
+		hwirq = ((msir->bit_end - pos) << msi_data->cfg->ibs_shift) |
+			msir->index;
 		virq = irq_find_mapping(msi_data->parent, hwirq);
 		if (virq)
 			generic_handle_irq(virq);
@@ -193,14 +205,24 @@ static int ls_scfg_msi_setup_hwirq(struct ls_scfg_msi *msi_data, int index)
 	msir->index = index;
 	msir->msi_data = msi_data;
 	msir->gic_irq = virq;
-	msir->reg = msi_data->regs + MSI_MSIR_OFFSET + 4 * index;
+	msir->reg = msi_data->regs + msi_data->cfg->msir_base + 4 * index;
+
+	if (msi_data->cfg->msir_irqs == MSI_LS1043V1_1_IRQS_PER_MSIR) {
+		msir->bit_start = 32 - ((msir->index + 1) *
+				  MSI_LS1043V1_1_IRQS_PER_MSIR);
+		msir->bit_end = msir->bit_start +
+				MSI_LS1043V1_1_IRQS_PER_MSIR - 1;
+	} else {
+		msir->bit_start = 0;
+		msir->bit_end = msi_data->cfg->msir_irqs - 1;
+	}
 
 	irq_set_chained_handler_and_data(msir->gic_irq,
 					 ls_scfg_msi_irq_handler,
 					 msir);
 
 	/* Release the hwirqs corresponding to this MSIR */
-	for (i = 0; i < MSI_IRQS_PER_MSIR; i++) {
+	for (i = 0; i < msi_data->cfg->msir_irqs; i++) {
 		hwirq = i << msi_data->cfg->ibs_shift | msir->index;
 		bitmap_clear(msi_data->used, hwirq, 1);
 	}
@@ -216,7 +238,7 @@ static int ls_scfg_msi_teardown_hwirq(struct ls_scfg_msir *msir)
 	if (msir->gic_irq > 0)
 		irq_set_chained_handler_and_data(msir->gic_irq, NULL, NULL);
 
-	for (i = 0; i < MSI_IRQS_PER_MSIR; i++) {
+	for (i = 0; i < msi_data->cfg->msir_irqs; i++) {
 		hwirq = i << msi_data->cfg->ibs_shift | msir->index;
 		bitmap_set(msi_data->used, hwirq, 1);
 	}
@@ -226,15 +248,26 @@ static int ls_scfg_msi_teardown_hwirq(struct ls_scfg_msir *msir)
 
 static struct ls_scfg_msi_cfg ls1021_msi_cfg = {
 	.ibs_shift = 3,
+	.msir_irqs = MSI_IRQS_PER_MSIR,
+	.msir_base = MSI_MSIR_OFFSET,
 };
 
 static struct ls_scfg_msi_cfg ls1046_msi_cfg = {
 	.ibs_shift = 2,
+	.msir_irqs = MSI_IRQS_PER_MSIR,
+	.msir_base = MSI_MSIR_OFFSET,
+};
+
+static struct ls_scfg_msi_cfg ls1043_v1_1_msi_cfg = {
+	.ibs_shift = 2,
+	.msir_irqs = MSI_LS1043V1_1_IRQS_PER_MSIR,
+	.msir_base = MSI_LS1043V1_1_MSIR_OFFSET,
 };
 
 static const struct of_device_id ls_scfg_msi_id[] = {
 	{ .compatible = "fsl,ls1021a-msi", .data = &ls1021_msi_cfg },
 	{ .compatible = "fsl,ls1043a-msi", .data = &ls1021_msi_cfg },
+	{ .compatible = "fsl,ls1043a-v1.1-msi", .data = &ls1043_v1_1_msi_cfg },
 	{ .compatible = "fsl,ls1046a-msi", .data = &ls1046_msi_cfg },
 	{},
 };
-- 
1.9.1

Re: [PATCH 8/9] irqchip/ls-scfg-msi: add LS1043a v1.1 MSI support

[Rob Herring]

On Tue, Dec 27, 2016 at 05:13:04PM +0800, Minghuan Lian wrote:
> A MSI controller of LS1043a v1.0 only includes one MSIR and
> is assigned one GIC interrupt. In order to support affinity,
> LS1043a v1.1 MSI is assigned 4 MSIRs and 4 GIC interrupts.
> But the MSIR has the different offset and only supports 8 MSIs.
> The bits between variable bit_start and bit_end in structure
> ls_scfg_msir are used to show 8 MSI interrupts. msir_irqs and
> msir_base are added to describe the difference of MSI between
> LS1043a v1.1 and other SoCs.
> 
> Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
> ---
>  .../interrupt-controller/fsl,ls-scfg-msi.txt       |  1 +
>  drivers/irqchip/irq-ls-scfg-msi.c                  | 45 +++++++++++++++++++---
>  2 files changed, 40 insertions(+), 6 deletions(-)

Acked-by: Rob Herring <robh@kernel.org> 

[PATCH 9/9] irqchip/ls-scfg-msi: add MSI affinity support

[Minghuan Lian]

For LS1046a and LS1043a v1.1, the MSI controller has 4 MSIRs and 4
CPUs. A GIC SPI interrupt of MSIR can be associated with a CPU.
When changing MSI interrupt affinity, this MSI will be moved to the
corresponding MSIR and MSI message data will be changed according to
MSIR. when requesting a MSI, the bits of all 4 MSIR will be reserved.
The parameter 'msi_affinity_flag' is provide to change this mode.
"lsmsi=no-affinity" will disable affinity, all MSI can only be
associated with CPU 0.

Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
---
 drivers/irqchip/irq-ls-scfg-msi.c | 75 ++++++++++++++++++++++++++++++++++++---
 1 file changed, 70 insertions(+), 5 deletions(-)

diff --git a/drivers/irqchip/irq-ls-scfg-msi.c b/drivers/irqchip/irq-ls-scfg-msi.c
index dc19569..753fe39 100644
--- a/drivers/irqchip/irq-ls-scfg-msi.c
+++ b/drivers/irqchip/irq-ls-scfg-msi.c
@@ -40,6 +40,7 @@ struct ls_scfg_msir {
 	unsigned int gic_irq;
 	unsigned int bit_start;
 	unsigned int bit_end;
+	unsigned int srs; /* Shared interrupt register select */
 	void __iomem *reg;
 };
 
@@ -70,6 +71,19 @@ struct ls_scfg_msi {
 	.chip	= &ls_scfg_msi_irq_chip,
 };
 
+static int msi_affinity_flag = 1;
+
+static int __init early_parse_ls_scfg_msi(char *p)
+{
+	if (p && strncmp(p, "no-affinity", 11) == 0)
+		msi_affinity_flag = 0;
+	else
+		msi_affinity_flag = 1;
+
+	return 0;
+}
+early_param("lsmsi", early_parse_ls_scfg_msi);
+
 static void ls_scfg_msi_compose_msg(struct irq_data *data, struct msi_msg *msg)
 {
 	struct ls_scfg_msi *msi_data = irq_data_get_irq_chip_data(data);
@@ -77,12 +91,43 @@ static void ls_scfg_msi_compose_msg(struct irq_data *data, struct msi_msg *msg)
 	msg->address_hi = upper_32_bits(msi_data->msiir_addr);
 	msg->address_lo = lower_32_bits(msi_data->msiir_addr);
 	msg->data = data->hwirq;
+
+	if (msi_affinity_flag) {
+		u32 msir_index;
+
+		msir_index = cpumask_first(data->common->affinity);
+		if (msir_index >= msi_data->msir_num)
+			msir_index = 0;
+
+		msg->data |= msir_index;
+	}
 }
 
 static int ls_scfg_msi_set_affinity(struct irq_data *irq_data,
 				    const struct cpumask *mask, bool force)
 {
-	return -EINVAL;
+	struct ls_scfg_msi *msi_data = irq_data_get_irq_chip_data(irq_data);
+	u32 cpu;
+
+	if (!msi_affinity_flag)
+		return -EINVAL;
+
+	if (!force)
+		cpu = cpumask_any_and(mask, cpu_online_mask);
+	else
+		cpu = cpumask_first(mask);
+
+	if (cpu >= msi_data->msir_num)
+		return -EINVAL;
+
+	if (msi_data->msir[cpu].gic_irq <= 0) {
+		pr_warn("cannot bind the irq to cpu%d\n", cpu);
+		return -EINVAL;
+	}
+
+	cpumask_copy(irq_data->common->affinity, mask);
+
+	return IRQ_SET_MASK_OK;
 }
 
 static struct irq_chip ls_scfg_msi_parent_chip = {
@@ -158,7 +203,7 @@ static void ls_scfg_msi_irq_handler(struct irq_desc *desc)
 
 	for_each_set_bit_from(pos, &val, size) {
 		hwirq = ((msir->bit_end - pos) << msi_data->cfg->ibs_shift) |
-			msir->index;
+			msir->srs;
 		virq = irq_find_mapping(msi_data->parent, hwirq);
 		if (virq)
 			generic_handle_irq(virq);
@@ -221,10 +266,19 @@ static int ls_scfg_msi_setup_hwirq(struct ls_scfg_msi *msi_data, int index)
 					 ls_scfg_msi_irq_handler,
 					 msir);
 
+	if (msi_affinity_flag) {
+		/* Associate MSIR interrupt to the cpu */
+		irq_set_affinity(msir->gic_irq, get_cpu_mask(index));
+		msir->srs = 0; /* This value is determined by the CPU */
+	} else
+		msir->srs = index;
+
 	/* Release the hwirqs corresponding to this MSIR */
-	for (i = 0; i < msi_data->cfg->msir_irqs; i++) {
-		hwirq = i << msi_data->cfg->ibs_shift | msir->index;
-		bitmap_clear(msi_data->used, hwirq, 1);
+	if (!msi_affinity_flag || msir->index == 0) {
+		for (i = 0; i < msi_data->cfg->msir_irqs; i++) {
+			hwirq = i << msi_data->cfg->ibs_shift | msir->index;
+			bitmap_clear(msi_data->used, hwirq, 1);
+		}
 	}
 
 	return 0;
@@ -316,6 +370,17 @@ static int ls_scfg_msi_probe(struct platform_device *pdev)
 	bitmap_set(msi_data->used, 0, msi_data->irqs_num);
 
 	msi_data->msir_num = of_irq_count(pdev->dev.of_node);
+
+	if (msi_affinity_flag) {
+		u32 cpu_num;
+
+		cpu_num = num_possible_cpus();
+		if (msi_data->msir_num >= cpu_num)
+			msi_data->msir_num = cpu_num;
+		else
+			msi_affinity_flag = 0;
+	}
+
 	msi_data->msir = devm_kcalloc(&pdev->dev, msi_data->msir_num,
 				      sizeof(*msi_data->msir),
 				      GFP_KERNEL);
-- 
1.9.1

Re: [PATCH 1/9] irqchip/ls-scfg-msi: fix typo of MSI compatible strings

[Rob Herring]

On Tue, Dec 27, 2016 at 05:12:57PM +0800, Minghuan Lian wrote:
> The patch is to fix typo of the Layerscape SCFG MSI dts compatible
> strings. "1" is replaced by "l".
> 
> Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
> ---
>  .../devicetree/bindings/interrupt-controller/fsl,ls-scfg-msi.txt    | 6 +++---
>  drivers/irqchip/irq-ls-scfg-msi.c                                   | 6 ++++--
>  2 files changed, 7 insertions(+), 5 deletions(-)

Acked-by: Rob Herring <robh@kernel.org>