Adds common operations for image processing accelerator drivers
including dma-buf control and ioctl definitiion
Signed-off-by: Yuji Ishikawa <yuji2.ishikawa@xxxxxxxxxxxxx>
Reviewed-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@xxxxxxxxxxxxx>
---
v1 -> v2:
- apply checkpatch.pl --strict
---
drivers/soc/Kconfig | 1 +
drivers/soc/Makefile | 1 +
drivers/soc/visconti/Kconfig | 1 +
drivers/soc/visconti/Makefile | 6 +++
drivers/soc/visconti/ipa_common.c | 55 +++++++++++++++++++
drivers/soc/visconti/ipa_common.h | 18 +++++++
drivers/soc/visconti/uapi/ipa.h | 88 +++++++++++++++++++++++++++++++
7 files changed, 170 insertions(+)
create mode 100644 drivers/soc/visconti/Kconfig
create mode 100644 drivers/soc/visconti/Makefile
create mode 100644 drivers/soc/visconti/ipa_common.c
create mode 100644 drivers/soc/visconti/ipa_common.h
create mode 100644 drivers/soc/visconti/uapi/ipa.h
diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig
index e8a30c4c5..c99139aa8 100644
--- a/drivers/soc/Kconfig
+++ b/drivers/soc/Kconfig
@@ -22,6 +22,7 @@ source "drivers/soc/tegra/Kconfig"
source "drivers/soc/ti/Kconfig"
source "drivers/soc/ux500/Kconfig"
source "drivers/soc/versatile/Kconfig"
+source "drivers/soc/visconti/Kconfig"
source "drivers/soc/xilinx/Kconfig"
endmenu
diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile
index a05e9fbcd..455b993c2 100644
--- a/drivers/soc/Makefile
+++ b/drivers/soc/Makefile
@@ -28,4 +28,5 @@ obj-$(CONFIG_ARCH_TEGRA) += tegra/
obj-y += ti/
obj-$(CONFIG_ARCH_U8500) += ux500/
obj-$(CONFIG_PLAT_VERSATILE) += versatile/
+obj-$(CONFIG_ARCH_VISCONTI) += visconti/
obj-y += xilinx/
diff --git a/drivers/soc/visconti/Kconfig b/drivers/soc/visconti/Kconfig
new file mode 100644
index 000000000..8b1378917
--- /dev/null
+++ b/drivers/soc/visconti/Kconfig
@@ -0,0 +1 @@
+
diff --git a/drivers/soc/visconti/Makefile b/drivers/soc/visconti/Makefile
new file mode 100644
index 000000000..8d710da08
--- /dev/null
+++ b/drivers/soc/visconti/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Visconti specific device drivers.
+#
+
+obj-y += ipa_common.o
diff --git a/drivers/soc/visconti/ipa_common.c b/drivers/soc/visconti/ipa_common.c
new file mode 100644
index 000000000..6345f33c5
--- /dev/null
+++ b/drivers/soc/visconti/ipa_common.c
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/* Toshiba Visconti Image Processing Accelerator Support
+ *
+ * (C) Copyright 2022 TOSHIBA CORPORATION
+ * (C) Copyright 2022 Toshiba Electronic Devices & Storage Corporation
+ */
+
+#include "ipa_common.h"
+
+int ipa_attach_dmabuf(struct device *dev, int fd, struct dma_buf_attachment **a,
+ struct sg_table **s, dma_addr_t *addr, enum dma_data_direction dma_dir)
+{
+ struct dma_buf_attachment *attachment;
+ struct dma_buf *dmabuf;
+ struct sg_table *sgt;
+ int ret;
+
+ dmabuf = dma_buf_get(fd);
+ if (IS_ERR(dmabuf)) {
+ dev_err(dev, "Invalid dmabuf FD\n");
+ return PTR_ERR(dmabuf);
+ }
+ attachment = dma_buf_attach(dmabuf, dev);
+
+ if (IS_ERR(attachment)) {
+ dev_err(dev, "Failed to attach dmabuf\n");
+ ret = PTR_ERR(attachment);
+ goto err_put;
+ }
+ sgt = dma_buf_map_attachment(attachment, dma_dir);
+ if (IS_ERR(sgt)) {
+ dev_err(dev, "Failed to get dmabufs sg_table\n");
+ ret = PTR_ERR(sgt);
+ goto err_detach;
+ }
+ if (sgt->nents != 1) {
+ dev_err(dev, "Sparse DMA region is unsupported\n");
+ ret = -EINVAL;
+ goto err_unmap;
+ }
+
+ *addr = sg_dma_address(sgt->sgl);
+ *a = attachment;
+ *s = sgt;
+
+ return 0;
+
+err_unmap:
+ dma_buf_unmap_attachment(attachment, sgt, dma_dir);
+err_detach:
+ dma_buf_detach(dmabuf, attachment);
+err_put:
+ dma_buf_put(dmabuf);
+ return ret;
+}
diff --git a/drivers/soc/visconti/ipa_common.h b/drivers/soc/visconti/ipa_common.h
new file mode 100644
index 000000000..786988c52
--- /dev/null
+++ b/drivers/soc/visconti/ipa_common.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */
+/* Toshiba Visconti Image Processing Accelerator Support
+ *
+ * (C) Copyright 2022 TOSHIBA CORPORATION
+ * (C) Copyright 2022 Toshiba Electronic Devices & Storage Corporation
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/dma-buf.h>
+
+#define COHERENT_ADDRESS_BIT (0x400000000ULL)
+#define IPA_POLL_EVENT_NONE (0)
+#define IPA_POLL_EVENT_DONE (1)
+#define IPA_POLL_EVENT_ERROR (2)
+#define IPA_WAKEUP_RETRY_DELAY (300 * 1000) /*usec*/
+
+int ipa_attach_dmabuf(struct device *dev, int fd, struct dma_buf_attachment **a,
+ struct sg_table **s, dma_addr_t *addr, enum dma_data_direction dma_dir);
diff --git a/drivers/soc/visconti/uapi/ipa.h b/drivers/soc/visconti/uapi/ipa.h
new file mode 100644
index 000000000..e5c919ea2
--- /dev/null
+++ b/drivers/soc/visconti/uapi/ipa.h
@@ -0,0 +1,88 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/* Toshiba Visconti Image Processing Accelerator Support
+ *
+ * (C) Copyright 2022 TOSHIBA CORPORATION
+ * (C) Copyright 2022 Toshiba Electronic Devices & Storage Corporation
+ */
+
+#ifndef _UAPI_LINUX_IPA_H
+#define _UAPI_LINUX_IPA_H
+
+/**
+ * enum drv_ipa_state - state of Visconti IPA driver
+ *
+ * @DRV_IPA_STATE_IDLE: driver is idle
+ * @DRV_IPA_STATE_BUSY: device is busy
+ */
+enum drv_ipa_state { DRV_IPA_STATE_IDLE = 0, DRV_IPA_STATE_BUSY };
+
+/**
+ * enum drv_ipa_buffer_direction - usage of buffer
+ *
+ * @DRV_IPA_DIR_BIDIRECTION: cpu writes/reads data
+ * @DRV_IPA_DIR_TO_DEVICE: cpu writes data
+ * @DRV_IPA_DIR_FROM_DEVICE: cpu reads data
+ * @DRV_IPA_DIR_NONE: cpu not access or non-coherent
+ */
+enum drv_ipa_buffer_direction {
+ DRV_IPA_DIR_BIDIRECTION = 0,
+ DRV_IPA_DIR_TO_DEVICE,
+ DRV_IPA_DIR_FROM_DEVICE,
+ DRV_IPA_DIR_NONE
+};
+
+/**
+ * struct drv_ipa_buffer_info - buffer information for Visconti IPA drivers
+ *
+ * @fd: file descriptor of Ion allocated heap
+ * @coherent: allocated via coherent bus or not
+ * @direction: buffer direction (to/from device)
+ *
+ * note: When the Ion heap is allocated wit ION_FLAG_CACHED,
+ * &struct drv_ipa_buffer_info.coherent should be true.
+ * Else, it should be false.
+ */
+struct drv_ipa_buffer_info {
+ u32 fd;
+ bool coherent;
+ enum drv_ipa_buffer_direction direction;
+};
+
+/**
+ * struct drv_ipa_addr - address structure for Visconti IPA drivers
+ *
+ * @buffer_index: array index of &struct drv_ipa_buffer_info
+ * @offset: offset from the top of Ion heap
+ */
+struct drv_ipa_addr {
+ u32 buffer_index : 4;
+ u32 offset : 28;
+};
+
+#define IPA_BUFFER_INDEX_MAX (16)
+#define IPA_INVALID_ADDR \
+ { \
+ .buffer_index = 0xfu, .offset = 0xfffffffu \
+ }
+
+static inline struct drv_ipa_addr drv_ipa_invalid_addr(void)
+{
+ struct drv_ipa_addr invalid_addr = IPA_INVALID_ADDR;
+ return invalid_addr;
+}
+
+static inline bool drv_ipa_is_invalid_addr(struct drv_ipa_addr addr)
+{
+ struct drv_ipa_addr invalid_addr = IPA_INVALID_ADDR;
+
+ if (addr.buffer_index == invalid_addr.buffer_index && addr.offset == invalid_addr.offset) {
+ return true;
+ }
+ return false;
+}
+
+#define IOC_IPA_MAGIC 'I'
+#define IOC_IPA_START _IO(IOC_IPA_MAGIC, 0)
+#define IOC_IPA_GET_STATUS _IO(IOC_IPA_MAGIC, 1)
+
+#endif /* _UAPI_LINUX_IPA_H */
--
2.17.1
