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From: Xiaowei Bao <xiaowei.bao@nxp.com>
To: robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org,
	leoyang.li@nxp.com, kishon@ti.com, lorenzo.pieralisi@arm.com,
	minghuan.Lian@nxp.com, mingkai.hu@nxp.com, roy.zang@nxp.com,
	jingoohan1@gmail.com, gustavo.pimentel@synopsys.com,
	linux-pci@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linuxppc-dev@lists.ozlabs.org
Cc: gregkh@linuxfoundation.org, zhiqiang.hou@nxp.com,
	Xiaowei Bao <xiaowei.bao@nxp.com>,
	arnd@arndb.de
Subject: [PATCH v3 02/11] PCI: designware-ep: Add the doorbell mode of MSI-X in EP mode
Date: Mon,  2 Sep 2019 11:17:07 +0800
Message-ID: <20190902031716.43195-3-xiaowei.bao@nxp.com> (raw)
In-Reply-To: <20190902031716.43195-1-xiaowei.bao@nxp.com>

Add the doorbell mode of MSI-X in EP mode.

Signed-off-by: Xiaowei Bao <xiaowei.bao@nxp.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
---
v2:
 - Remove the macro of no used.
v3:
 - No change.

 drivers/pci/controller/dwc/pcie-designware-ep.c | 14 ++++++++++++++
 drivers/pci/controller/dwc/pcie-designware.h    | 12 ++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
index eb851c2..55b23ce 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -449,6 +449,20 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
 	return 0;
 }
 
+int dw_pcie_ep_raise_msix_irq_doorbell(struct dw_pcie_ep *ep, u8 func_no,
+				       u16 interrupt_num)
+{
+	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+	u32 msg_data;
+
+	msg_data = (func_no << PCIE_MSIX_DOORBELL_PF_SHIFT) |
+		   (interrupt_num - 1);
+
+	dw_pcie_writel_dbi(pci, PCIE_MSIX_DOORBELL, msg_data);
+
+	return 0;
+}
+
 int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
 			      u16 interrupt_num)
 {
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index 6aca0bb..56789be 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -88,6 +88,9 @@
 #define PCIE_MISC_CONTROL_1_OFF		0x8BC
 #define PCIE_DBI_RO_WR_EN		BIT(0)
 
+#define PCIE_MSIX_DOORBELL		0x948
+#define PCIE_MSIX_DOORBELL_PF_SHIFT	24
+
 #define PCIE_PL_CHK_REG_CONTROL_STATUS			0xB20
 #define PCIE_PL_CHK_REG_CHK_REG_START			BIT(0)
 #define PCIE_PL_CHK_REG_CHK_REG_CONTINUOUS		BIT(1)
@@ -419,6 +422,8 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
 			     u8 interrupt_num);
 int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
 			     u16 interrupt_num);
+int dw_pcie_ep_raise_msix_irq_doorbell(struct dw_pcie_ep *ep, u8 func_no,
+				       u16 interrupt_num);
 void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar);
 #else
 static inline void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
@@ -451,6 +456,13 @@ static inline int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
 	return 0;
 }
 
+static inline int dw_pcie_ep_raise_msix_irq_doorbell(struct dw_pcie_ep *ep,
+						     u8 func_no,
+						     u16 interrupt_num)
+{
+	return 0;
+}
+
 static inline void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
 {
 }
-- 
2.9.5


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  parent reply index

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-02  3:17 [PATCH v3 00/11] *** SUBJECT HERE *** Xiaowei Bao
2019-09-02  3:17 ` [PATCH v3 01/11] PCI: designware-ep: Add multiple PFs support for DWC Xiaowei Bao
2019-09-02 16:26   ` Andrew Murray
2019-09-03  3:43     ` Xiaowei Bao
2019-09-26 10:29       ` Andrew Murray
2019-09-26 13:38         ` Gustavo Pimentel
2019-09-02  3:17 ` Xiaowei Bao [this message]
2019-09-02  3:17 ` [PATCH v3 03/11] PCI: designware-ep: Move the function of getting MSI capability forward Xiaowei Bao
2019-09-02  3:17 ` [PATCH v3 04/11] PCI: designware-ep: Modify MSI and MSIX CAP way of finding Xiaowei Bao
2019-09-02 15:07   ` Andrew Murray
2019-09-03  2:33     ` Xiaowei Bao
2019-09-02  3:17 ` [PATCH v3 05/11] dt-bindings: pci: layerscape-pci: add compatible strings for ls1088a and ls2088a Xiaowei Bao
2019-09-02 12:31   ` Andrew Murray
2019-09-03  1:33     ` Xiaowei Bao
2019-09-02  3:17 ` [PATCH v3 06/11] PCI: layerscape: Fix some format issue of the code Xiaowei Bao
2019-09-02  3:17 ` [PATCH v3 07/11] PCI: layerscape: Modify the way of getting capability with different PEX Xiaowei Bao
2019-09-02 13:37   ` Andrew Murray
2019-09-03  2:13     ` Xiaowei Bao
2019-09-02  3:17 ` [PATCH v3 08/11] PCI: layerscape: Modify the MSIX to the doorbell mode Xiaowei Bao
2019-09-02 12:01   ` Andrew Murray
2019-09-12 11:24     ` Gustavo Pimentel
2019-09-14  6:37       ` Xiaowei Bao
2019-09-16  8:54         ` Gustavo Pimentel
2019-09-02  3:17 ` [PATCH v3 09/11] PCI: layerscape: Add EP mode support for ls1088a and ls2088a Xiaowei Bao
2019-09-02 12:46   ` Andrew Murray
2019-09-03  1:47     ` Xiaowei Bao
2019-09-12 12:49       ` Andrew Murray
2019-09-14  4:10         ` Xiaowei Bao
2019-09-16 14:37           ` Andrew Murray
2019-09-18  3:17             ` Xiaowei Bao
2019-09-02  3:17 ` [PATCH v3 10/11] arm64: dts: layerscape: Add PCIe EP node for ls1088a Xiaowei Bao
2019-09-02 13:06   ` Andrew Murray
2019-09-03  2:01     ` Xiaowei Bao
2019-09-12 13:01       ` Andrew Murray
2019-09-14  4:15         ` Xiaowei Bao
2019-09-02  3:17 ` [PATCH v3 11/11] misc: pci_endpoint_test: Add LS1088a in pci_device_id table Xiaowei Bao
2019-09-02 12:54   ` Andrew Murray
2019-09-03  1:52     ` Xiaowei Bao
2019-09-12 12:59       ` Andrew Murray
2019-09-14  4:13         ` Xiaowei Bao
2019-09-02  3:52 ` [PATCH v3 00/11] *** SUBJECT HERE *** Z.q. Hou
2019-09-02  3:54   ` Xiaowei Bao

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