subject:"\[RFC v2 1\/2\] mailbox\: ZynqMP IPI mailbox controller"

[RFC v2 1/2] mailbox: ZynqMP IPI mailbox controller

2017-12-03 Thread Wendy Liang

This patch is to introduce ZynqMP IPI mailbox controller driver
to use the ZynqMP IPI block as mailboxes.

Signed-off-by: Wendy Liang 
---
 drivers/mailbox/Kconfig|   8 +
 drivers/mailbox/Makefile   |   2 +
 drivers/mailbox/zynqmp-ipi-mailbox.c   | 633 +
 include/linux/mailbox/zynqmp-ipi-message.h |  24 ++
 4 files changed, 667 insertions(+)
 create mode 100644 drivers/mailbox/zynqmp-ipi-mailbox.c
 create mode 100644 include/linux/mailbox/zynqmp-ipi-message.h

diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig
index ba2f152..876614a 100644
--- a/drivers/mailbox/Kconfig
+++ b/drivers/mailbox/Kconfig
@@ -171,4 +171,12 @@ config BCM_FLEXRM_MBOX
  Mailbox implementation of the Broadcom FlexRM ring manager,
  which provides access to various offload engines on Broadcom
  SoCs. Say Y here if you want to use the Broadcom FlexRM.
+
+config ZYNQMP_IPI_MBOX
+   tristate "Xilinx ZynqMP IPI Mailbox"
+   depends on ARCH_ZYNQMP && OF
+   help
+ Mailbox implementation for Xilinx ZynqMP IPI. It is used to send
+ notification or short message between processors with Xilinx
+ ZynqMP IPI.
 endif
diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile
index 4896f8d..155f72f 100644
--- a/drivers/mailbox/Makefile
+++ b/drivers/mailbox/Makefile
@@ -36,3 +36,5 @@ obj-$(CONFIG_BCM_FLEXRM_MBOX) += bcm-flexrm-mailbox.o
 obj-$(CONFIG_QCOM_APCS_IPC)+= qcom-apcs-ipc-mailbox.o
 
 obj-$(CONFIG_TEGRA_HSP_MBOX)   += tegra-hsp.o
+
+obj-$(CONFIG_ZYNQMP_IPI_MBOX)  += zynqmp-ipi-mailbox.o
diff --git a/drivers/mailbox/zynqmp-ipi-mailbox.c 
b/drivers/mailbox/zynqmp-ipi-mailbox.c
new file mode 100644
index 000..334f5e1
--- /dev/null
+++ b/drivers/mailbox/zynqmp-ipi-mailbox.c
@@ -0,0 +1,633 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx Inter Processor Interrupt(IPI) Mailbox Driver
+ *
+ * Copyright (C) 2017 Xilinx Inc.
+ *
+ */
+
+#define pr_fmt(fmt) "%s: " fmt, __func__
+
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+
+/* IPI agent ID any */
+#define IPI_ID_ANY 0xFFUL
+
+/* indicate if ZynqMP IPI mailbox driver uses SMC calls or HVC calls */
+#define USE_SMC 0
+#define USE_HVC 1
+
+/* Default IPI SMC function IDs */
+#define SMC_IPI_MAILBOX_OPEN0x82001000U
+#define SMC_IPI_MAILBOX_RELEASE 0x82001001U
+#define SMC_IPI_MAILBOX_STATUS_ENQUIRY  0x82001002U
+#define SMC_IPI_MAILBOX_NOTIFY  0x82001003U
+#define SMC_IPI_MAILBOX_ACK 0x82001004U
+#define SMC_IPI_MAILBOX_ENABLE_IRQ  0x82001005U
+#define SMC_IPI_MAILBOX_DISABLE_IRQ 0x82001006U
+
+/* IPI SMC Macros */
+#define IPI_SMC_OPEN_IRQ_MASK  0x0001UL /* IRQ enable bit in IPI
+ * open SMC call
+ */
+#define IPI_SMC_NOTIFY_BLOCK_MASK  0x0001UL /* Flag to indicate if
+ * IPI notification needs
+ * to be blocking.
+ */
+#define IPI_SMC_ENQUIRY_DIRQ_MASK   0x0001UL /* Flag to indicate if
+ * notification interrupt
+ * to be disabled.
+ */
+#define IPI_SMC_ACK_EIRQ_MASK   0x0001UL /* Flag to indicate if
+ * notification interrupt
+ * to be enabled.
+ */
+
+/* IPI mailbox status */
+#define IPI_MB_STATUS_IDLE  0
+#define IPI_MB_STATUS_SEND_PENDING  1
+#define IPI_MB_STATUS_RECV_PENDING  2
+
+#define IPI_MB_CHNL_TX 0 /* IPI mailbox TX channel */
+#define IPI_MB_CHNL_RX 1 /* IPI mailbox RX channel */
+
+/**
+ * struct zynqmp_ipi_mchan - Description of a Xilinx ZynqMP IPI mailbox channel
+ * @is_opened: indicate if the IPI channel is opened
+ * @req_buf: local to remote request buffer start address
+ * @resp_buf: local to remote response buffer start address
+ * @req_buf_size: request buffer size
+ * @resp_buf_size: response buffer size
+ * @chan_type: channel type
+ */
+struct zynqmp_ipi_mchan {
+   int is_opened;
+   void __iomem *req_buf;
+   void __iomem *resp_buf;
+   size_t req_buf_size;
+   size_t resp_buf_size;
+   unsigned int chan_type;
+};
+
+/**
+ * struct zynqmp_ipi_mbox_pdata - Description of a ZynqMP IPI mailbox
+ *platform data.
+ * @dev:  device pointer corresponding to the Xilinx ZynqMP
+ *IPI mailbox
+ * @local_id: local IPI agent ID
+ *

[RFC v2 1/2] mailbox: ZynqMP IPI mailbox controller

2017-12-03 Thread Wendy Liang

This patch is to introduce ZynqMP IPI mailbox controller driver
to use the ZynqMP IPI block as mailboxes.

Signed-off-by: Wendy Liang 
---
 drivers/mailbox/Kconfig|   8 +
 drivers/mailbox/Makefile   |   2 +
 drivers/mailbox/zynqmp-ipi-mailbox.c   | 633 +
 include/linux/mailbox/zynqmp-ipi-message.h |  24 ++
 4 files changed, 667 insertions(+)
 create mode 100644 drivers/mailbox/zynqmp-ipi-mailbox.c
 create mode 100644 include/linux/mailbox/zynqmp-ipi-message.h

diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig
index ba2f152..876614a 100644
--- a/drivers/mailbox/Kconfig
+++ b/drivers/mailbox/Kconfig
@@ -171,4 +171,12 @@ config BCM_FLEXRM_MBOX
  Mailbox implementation of the Broadcom FlexRM ring manager,
  which provides access to various offload engines on Broadcom
  SoCs. Say Y here if you want to use the Broadcom FlexRM.
+
+config ZYNQMP_IPI_MBOX
+   tristate "Xilinx ZynqMP IPI Mailbox"
+   depends on ARCH_ZYNQMP && OF
+   help
+ Mailbox implementation for Xilinx ZynqMP IPI. It is used to send
+ notification or short message between processors with Xilinx
+ ZynqMP IPI.
 endif
diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile
index 4896f8d..155f72f 100644
--- a/drivers/mailbox/Makefile
+++ b/drivers/mailbox/Makefile
@@ -36,3 +36,5 @@ obj-$(CONFIG_BCM_FLEXRM_MBOX) += bcm-flexrm-mailbox.o
 obj-$(CONFIG_QCOM_APCS_IPC)+= qcom-apcs-ipc-mailbox.o
 
 obj-$(CONFIG_TEGRA_HSP_MBOX)   += tegra-hsp.o
+
+obj-$(CONFIG_ZYNQMP_IPI_MBOX)  += zynqmp-ipi-mailbox.o
diff --git a/drivers/mailbox/zynqmp-ipi-mailbox.c 
b/drivers/mailbox/zynqmp-ipi-mailbox.c
new file mode 100644
index 000..334f5e1
--- /dev/null
+++ b/drivers/mailbox/zynqmp-ipi-mailbox.c
@@ -0,0 +1,633 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx Inter Processor Interrupt(IPI) Mailbox Driver
+ *
+ * Copyright (C) 2017 Xilinx Inc.
+ *
+ */
+
+#define pr_fmt(fmt) "%s: " fmt, __func__
+
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+
+/* IPI agent ID any */
+#define IPI_ID_ANY 0xFFUL
+
+/* indicate if ZynqMP IPI mailbox driver uses SMC calls or HVC calls */
+#define USE_SMC 0
+#define USE_HVC 1
+
+/* Default IPI SMC function IDs */
+#define SMC_IPI_MAILBOX_OPEN0x82001000U
+#define SMC_IPI_MAILBOX_RELEASE 0x82001001U
+#define SMC_IPI_MAILBOX_STATUS_ENQUIRY  0x82001002U
+#define SMC_IPI_MAILBOX_NOTIFY  0x82001003U
+#define SMC_IPI_MAILBOX_ACK 0x82001004U
+#define SMC_IPI_MAILBOX_ENABLE_IRQ  0x82001005U
+#define SMC_IPI_MAILBOX_DISABLE_IRQ 0x82001006U
+
+/* IPI SMC Macros */
+#define IPI_SMC_OPEN_IRQ_MASK  0x0001UL /* IRQ enable bit in IPI
+ * open SMC call
+ */
+#define IPI_SMC_NOTIFY_BLOCK_MASK  0x0001UL /* Flag to indicate if
+ * IPI notification needs
+ * to be blocking.
+ */
+#define IPI_SMC_ENQUIRY_DIRQ_MASK   0x0001UL /* Flag to indicate if
+ * notification interrupt
+ * to be disabled.
+ */
+#define IPI_SMC_ACK_EIRQ_MASK   0x0001UL /* Flag to indicate if
+ * notification interrupt
+ * to be enabled.
+ */
+
+/* IPI mailbox status */
+#define IPI_MB_STATUS_IDLE  0
+#define IPI_MB_STATUS_SEND_PENDING  1
+#define IPI_MB_STATUS_RECV_PENDING  2
+
+#define IPI_MB_CHNL_TX 0 /* IPI mailbox TX channel */
+#define IPI_MB_CHNL_RX 1 /* IPI mailbox RX channel */
+
+/**
+ * struct zynqmp_ipi_mchan - Description of a Xilinx ZynqMP IPI mailbox channel
+ * @is_opened: indicate if the IPI channel is opened
+ * @req_buf: local to remote request buffer start address
+ * @resp_buf: local to remote response buffer start address
+ * @req_buf_size: request buffer size
+ * @resp_buf_size: response buffer size
+ * @chan_type: channel type
+ */
+struct zynqmp_ipi_mchan {
+   int is_opened;
+   void __iomem *req_buf;
+   void __iomem *resp_buf;
+   size_t req_buf_size;
+   size_t resp_buf_size;
+   unsigned int chan_type;
+};
+
+/**
+ * struct zynqmp_ipi_mbox_pdata - Description of a ZynqMP IPI mailbox
+ *platform data.
+ * @dev:  device pointer corresponding to the Xilinx ZynqMP
+ *IPI mailbox
+ * @local_id: local IPI agent ID
+ * @remote_id:

[RFC v2 1/2] mailbox: ZynqMP IPI mailbox controller

[RFC v2 1/2] mailbox: ZynqMP IPI mailbox controller

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