subject:"\[PATCH v3 09\/34\] misc\: xlink\-pcie\: lh\: Add PCIe EPF driver for Local Host"

[PATCH v3 09/34] misc: xlink-pcie: lh: Add PCIe EPF driver for Local Host

2021-01-29 Thread mgross

From: Srikanth Thokala 

Add PCIe EPF driver for local host (lh) to configure BAR's and other
HW resources. Underlying PCIe HW controller is a Synopsys DWC PCIe core.

Cc: Derek Kiernan 
Cc: Dragan Cvetic 
Cc: Arnd Bergmann 
Cc: Greg Kroah-Hartman 
Reviewed-by: Mark Gross 
Signed-off-by: Srikanth Thokala 
---
 MAINTAINERS |   6 +
 drivers/misc/Kconfig|   1 +
 drivers/misc/Makefile   |   1 +
 drivers/misc/xlink-pcie/Kconfig |   9 +
 drivers/misc/xlink-pcie/Makefile|   1 +
 drivers/misc/xlink-pcie/local_host/Makefile |   2 +
 drivers/misc/xlink-pcie/local_host/epf.c| 373 
 drivers/misc/xlink-pcie/local_host/epf.h|  37 ++
 drivers/misc/xlink-pcie/local_host/xpcie.h  |  38 ++
 9 files changed, 468 insertions(+)
 create mode 100644 drivers/misc/xlink-pcie/Kconfig
 create mode 100644 drivers/misc/xlink-pcie/Makefile
 create mode 100644 drivers/misc/xlink-pcie/local_host/Makefile
 create mode 100644 drivers/misc/xlink-pcie/local_host/epf.c
 create mode 100644 drivers/misc/xlink-pcie/local_host/epf.h
 create mode 100644 drivers/misc/xlink-pcie/local_host/xpcie.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 6742a1827cd9..3ca6c8c6341b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1961,6 +1961,12 @@ F:   
Documentation/devicetree/bindings/arm/intel,keembay.yaml
 F: arch/arm64/boot/dts/intel/keembay-evm.dts
 F: arch/arm64/boot/dts/intel/keembay-soc.dtsi
 
+ARM KEEM BAY XLINK PCIE SUPPORT
+M: Srikanth Thokala 
+M: Mark Gross 
+S: Supported
+F: drivers/misc/xlink-pcie/
+
 ARM/INTEL RESEARCH IMOTE/STARGATE 2 MACHINE SUPPORT
 M: Jonathan Cameron 
 L: linux-arm-ker...@lists.infradead.org (moderated for non-subscribers)
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index fafa8b0d8099..dfb98e444c6e 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -481,4 +481,5 @@ source "drivers/misc/ocxl/Kconfig"
 source "drivers/misc/cardreader/Kconfig"
 source "drivers/misc/habanalabs/Kconfig"
 source "drivers/misc/uacce/Kconfig"
+source "drivers/misc/xlink-pcie/Kconfig"
 endmenu
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index d23231e73330..d17621fc43d5 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -57,3 +57,4 @@ obj-$(CONFIG_HABANA_AI)   += habanalabs/
 obj-$(CONFIG_UACCE)+= uacce/
 obj-$(CONFIG_XILINX_SDFEC) += xilinx_sdfec.o
 obj-$(CONFIG_HISI_HIKEY_USB)   += hisi_hikey_usb.o
+obj-y   += xlink-pcie/
diff --git a/drivers/misc/xlink-pcie/Kconfig b/drivers/misc/xlink-pcie/Kconfig
new file mode 100644
index ..46aa401d79b7
--- /dev/null
+++ b/drivers/misc/xlink-pcie/Kconfig
@@ -0,0 +1,9 @@
+config XLINK_PCIE_LH_DRIVER
+   tristate "XLink PCIe Local Host driver"
+   depends on PCI_ENDPOINT && ARCH_KEEMBAY
+   help
+ This option enables XLink PCIe Local Host driver.
+
+ Choose M here to compile this driver as a module, name is mxlk_ep.
+ This driver is used for XLink communication over PCIe and is to be
+ loaded on the Intel Keem Bay platform.
diff --git a/drivers/misc/xlink-pcie/Makefile b/drivers/misc/xlink-pcie/Makefile
new file mode 100644
index ..d693d382e9c6
--- /dev/null
+++ b/drivers/misc/xlink-pcie/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_XLINK_PCIE_LH_DRIVER) += local_host/
diff --git a/drivers/misc/xlink-pcie/local_host/Makefile 
b/drivers/misc/xlink-pcie/local_host/Makefile
new file mode 100644
index ..514d3f0c91bc
--- /dev/null
+++ b/drivers/misc/xlink-pcie/local_host/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_XLINK_PCIE_LH_DRIVER) += mxlk_ep.o
+mxlk_ep-objs := epf.o
diff --git a/drivers/misc/xlink-pcie/local_host/epf.c 
b/drivers/misc/xlink-pcie/local_host/epf.c
new file mode 100644
index ..0234756e89ae
--- /dev/null
+++ b/drivers/misc/xlink-pcie/local_host/epf.c
@@ -0,0 +1,373 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Intel Keem Bay XLink PCIe Driver
+ *
+ * Copyright (C) 2021 Intel Corporation
+ */
+
+#include 
+#include 
+
+#include "epf.h"
+
+#define BAR2_MIN_SIZE  SZ_16K
+#define BAR4_MIN_SIZE  SZ_16K
+
+#define PCIE_REGS_PCIE_INTR_ENABLE 0x18
+#define PCIE_REGS_PCIE_INTR_FLAGS  0x1C
+#define LBC_CII_EVENT_FLAG BIT(18)
+#define PCIE_REGS_PCIE_ERR_INTR_FLAGS  0x24
+#define LINK_REQ_RST_FLG   BIT(15)
+
+static struct pci_epf_header xpcie_header = {
+   .vendorid = PCI_VENDOR_ID_INTEL,
+   .deviceid = PCI_DEVICE_ID_INTEL_KEEMBAY,
+   .baseclass_code = PCI_BASE_CLASS_MULTIMEDIA,
+   .subclass_code = 0x0,
+   .subsys_vendor_id = 0x0,
+   .subsys_id = 0x0,
+};
+
+static const struct pci_epf_device_id xpcie_epf_ids[] = {
+   {
+   .name = "mxlk_pcie_epf",
+   },
+   {},
+};
+
+static irqreturn_t intel_xpcie_err_interrupt(int irq, void *args)
+{
+

[PATCH v3 09/34] misc: xlink-pcie: lh: Add PCIe EPF driver for Local Host

2021-01-26 Thread mgross

From: Srikanth Thokala 

Add PCIe EPF driver for local host (lh) to configure BAR's and other
HW resources. Underlying PCIe HW controller is a Synopsys DWC PCIe core.

Cc: Derek Kiernan 
Cc: Dragan Cvetic 
Cc: Arnd Bergmann 
Cc: Greg Kroah-Hartman 
Reviewed-by: Mark Gross 
Signed-off-by: Srikanth Thokala 
---
 MAINTAINERS |   6 +
 drivers/misc/Kconfig|   1 +
 drivers/misc/Makefile   |   1 +
 drivers/misc/xlink-pcie/Kconfig |   9 +
 drivers/misc/xlink-pcie/Makefile|   1 +
 drivers/misc/xlink-pcie/local_host/Makefile |   2 +
 drivers/misc/xlink-pcie/local_host/epf.c| 373 
 drivers/misc/xlink-pcie/local_host/epf.h|  37 ++
 drivers/misc/xlink-pcie/local_host/xpcie.h  |  38 ++
 9 files changed, 468 insertions(+)
 create mode 100644 drivers/misc/xlink-pcie/Kconfig
 create mode 100644 drivers/misc/xlink-pcie/Makefile
 create mode 100644 drivers/misc/xlink-pcie/local_host/Makefile
 create mode 100644 drivers/misc/xlink-pcie/local_host/epf.c
 create mode 100644 drivers/misc/xlink-pcie/local_host/epf.h
 create mode 100644 drivers/misc/xlink-pcie/local_host/xpcie.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 6742a1827cd9..3ca6c8c6341b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1961,6 +1961,12 @@ F:   
Documentation/devicetree/bindings/arm/intel,keembay.yaml
 F: arch/arm64/boot/dts/intel/keembay-evm.dts
 F: arch/arm64/boot/dts/intel/keembay-soc.dtsi
 
+ARM KEEM BAY XLINK PCIE SUPPORT
+M: Srikanth Thokala 
+M: Mark Gross 
+S: Supported
+F: drivers/misc/xlink-pcie/
+
 ARM/INTEL RESEARCH IMOTE/STARGATE 2 MACHINE SUPPORT
 M: Jonathan Cameron 
 L: linux-arm-ker...@lists.infradead.org (moderated for non-subscribers)
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index fafa8b0d8099..dfb98e444c6e 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -481,4 +481,5 @@ source "drivers/misc/ocxl/Kconfig"
 source "drivers/misc/cardreader/Kconfig"
 source "drivers/misc/habanalabs/Kconfig"
 source "drivers/misc/uacce/Kconfig"
+source "drivers/misc/xlink-pcie/Kconfig"
 endmenu
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index d23231e73330..d17621fc43d5 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -57,3 +57,4 @@ obj-$(CONFIG_HABANA_AI)   += habanalabs/
 obj-$(CONFIG_UACCE)+= uacce/
 obj-$(CONFIG_XILINX_SDFEC) += xilinx_sdfec.o
 obj-$(CONFIG_HISI_HIKEY_USB)   += hisi_hikey_usb.o
+obj-y   += xlink-pcie/
diff --git a/drivers/misc/xlink-pcie/Kconfig b/drivers/misc/xlink-pcie/Kconfig
new file mode 100644
index ..46aa401d79b7
--- /dev/null
+++ b/drivers/misc/xlink-pcie/Kconfig
@@ -0,0 +1,9 @@
+config XLINK_PCIE_LH_DRIVER
+   tristate "XLink PCIe Local Host driver"
+   depends on PCI_ENDPOINT && ARCH_KEEMBAY
+   help
+ This option enables XLink PCIe Local Host driver.
+
+ Choose M here to compile this driver as a module, name is mxlk_ep.
+ This driver is used for XLink communication over PCIe and is to be
+ loaded on the Intel Keem Bay platform.
diff --git a/drivers/misc/xlink-pcie/Makefile b/drivers/misc/xlink-pcie/Makefile
new file mode 100644
index ..d693d382e9c6
--- /dev/null
+++ b/drivers/misc/xlink-pcie/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_XLINK_PCIE_LH_DRIVER) += local_host/
diff --git a/drivers/misc/xlink-pcie/local_host/Makefile 
b/drivers/misc/xlink-pcie/local_host/Makefile
new file mode 100644
index ..514d3f0c91bc
--- /dev/null
+++ b/drivers/misc/xlink-pcie/local_host/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_XLINK_PCIE_LH_DRIVER) += mxlk_ep.o
+mxlk_ep-objs := epf.o
diff --git a/drivers/misc/xlink-pcie/local_host/epf.c 
b/drivers/misc/xlink-pcie/local_host/epf.c
new file mode 100644
index ..0234756e89ae
--- /dev/null
+++ b/drivers/misc/xlink-pcie/local_host/epf.c
@@ -0,0 +1,373 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Intel Keem Bay XLink PCIe Driver
+ *
+ * Copyright (C) 2021 Intel Corporation
+ */
+
+#include 
+#include 
+
+#include "epf.h"
+
+#define BAR2_MIN_SIZE  SZ_16K
+#define BAR4_MIN_SIZE  SZ_16K
+
+#define PCIE_REGS_PCIE_INTR_ENABLE 0x18
+#define PCIE_REGS_PCIE_INTR_FLAGS  0x1C
+#define LBC_CII_EVENT_FLAG BIT(18)
+#define PCIE_REGS_PCIE_ERR_INTR_FLAGS  0x24
+#define LINK_REQ_RST_FLG   BIT(15)
+
+static struct pci_epf_header xpcie_header = {
+   .vendorid = PCI_VENDOR_ID_INTEL,
+   .deviceid = PCI_DEVICE_ID_INTEL_KEEMBAY,
+   .baseclass_code = PCI_BASE_CLASS_MULTIMEDIA,
+   .subclass_code = 0x0,
+   .subsys_vendor_id = 0x0,
+   .subsys_id = 0x0,
+};
+
+static const struct pci_epf_device_id xpcie_epf_ids[] = {
+   {
+   .name = "mxlk_pcie_epf",
+   },
+   {},
+};
+
+static irqreturn_t intel_xpcie_err_interrupt(int irq, void *args)
+{
+

[PATCH v3 09/34] misc: xlink-pcie: lh: Add PCIe EPF driver for Local Host

[PATCH v3 09/34] misc: xlink-pcie: lh: Add PCIe EPF driver for Local Host

2 matches

Site Navigation

Mail list logo

Footer information