Move the IPI interface into a separate file mtk_scp_ipi.c, so the things
that use the interface only can depend on the module only.
Signed-off-by: Pi-Hsun Shih <[email protected]>
---
Changes from v1:
- Resolved conflict because of change in Patch 2.
---
drivers/remoteproc/Makefile | 2 +-
drivers/remoteproc/mtk_common.h | 73 +++++++++++++++
drivers/remoteproc/mtk_scp.c | 154 +------------------------------
drivers/remoteproc/mtk_scp_ipi.c | 108 ++++++++++++++++++++++
4 files changed, 183 insertions(+), 154 deletions(-)
create mode 100644 drivers/remoteproc/mtk_common.h
create mode 100644 drivers/remoteproc/mtk_scp_ipi.c
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index 98e3498dbbe0e2..16b3e5e7a81c8e 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -10,7 +10,7 @@ remoteproc-y += remoteproc_sysfs.o
remoteproc-y += remoteproc_virtio.o
remoteproc-y += remoteproc_elf_loader.o
obj-$(CONFIG_IMX_REMOTEPROC) += imx_rproc.o
-obj-$(CONFIG_MTK_SCP) += mtk_scp.o
+obj-$(CONFIG_MTK_SCP) += mtk_scp.o mtk_scp_ipi.o
obj-$(CONFIG_OMAP_REMOTEPROC) += omap_remoteproc.o
obj-$(CONFIG_WKUP_M3_RPROC) += wkup_m3_rproc.o
obj-$(CONFIG_DA8XX_REMOTEPROC) += da8xx_remoteproc.o
diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
new file mode 100644
index 00000000000000..e97287a4eb25cc
--- /dev/null
+++ b/drivers/remoteproc/mtk_common.h
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2018 MediaTek Inc.
+
+#ifndef __RPROC_MTK_COMMON_H
+#define __RPROC_MTK_COMMON_H
+
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+
+#define MT8183_SW_RSTN 0x0
+#define MT8183_SW_RSTN_BIT BIT(0)
+#define MT8183_SCP_TO_HOST 0x1C
+#define MT8183_SCP_IPC_INT_BIT BIT(0)
+#define MT8183_SCP_WDT_INT_BIT BIT(8)
+#define MT8183_HOST_TO_SCP 0x28
+#define MT8183_HOST_IPC_INT_BIT BIT(0)
+#define MT8183_SCP_SRAM_PDN 0x402C
+
+#define SCP_FW_VER_LEN 32
+
+struct scp_run {
+ u32 signaled;
+ s8 fw_ver[SCP_FW_VER_LEN];
+ u32 dec_capability;
+ u32 enc_capability;
+ wait_queue_head_t wq;
+};
+
+struct scp_ipi_desc {
+ scp_ipi_handler_t handler;
+ const char *name;
+ void *priv;
+};
+
+struct mtk_scp {
+ struct device *dev;
+ struct rproc *rproc;
+ struct clk *clk;
+ void __iomem *reg_base;
+ void __iomem *sram_base;
+ size_t sram_size;
+
+ struct share_obj *recv_buf;
+ struct share_obj *send_buf;
+ struct scp_run run;
+ struct mutex scp_mutex; /* for protecting mtk_scp data structure */
+ struct scp_ipi_desc ipi_desc[SCP_IPI_MAX];
+ bool ipi_id_ack[SCP_IPI_MAX];
+ wait_queue_head_t ack_wq;
+
+ void __iomem *cpu_addr;
+ phys_addr_t phys_addr;
+ size_t dram_size;
+};
+
+/**
+ * struct share_obj - SRAM buffer shared with
+ * AP and SCP
+ *
+ * @id: IPI id
+ * @len: share buffer length
+ * @share_buf: share buffer data
+ */
+struct share_obj {
+ s32 id;
+ u32 len;
+ u8 share_buf[288];
+};
+
+#endif
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index 6e2e17a227d018..3e84c696523436 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -13,163 +13,11 @@
#include <linux/platform_device.h>
#include <linux/remoteproc.h>
+#include "mtk_common.h"
#include "remoteproc_internal.h"
-#define MT8183_SW_RSTN 0x0
-#define MT8183_SW_RSTN_BIT BIT(0)
-#define MT8183_SCP_TO_HOST 0x1C
-#define MT8183_SCP_IPC_INT_BIT BIT(0)
-#define MT8183_SCP_WDT_INT_BIT BIT(8)
-#define MT8183_HOST_TO_SCP 0x28
-#define MT8183_HOST_IPC_INT_BIT BIT(0)
-#define MT8183_SCP_SRAM_PDN 0x402C
-
-#define SCP_FW_VER_LEN 32
-
#define MAX_CODE_SIZE 0x500000
-struct scp_run {
- u32 signaled;
- s8 fw_ver[SCP_FW_VER_LEN];
- u32 dec_capability;
- u32 enc_capability;
- wait_queue_head_t wq;
-};
-
-struct scp_ipi_desc {
- scp_ipi_handler_t handler;
- const char *name;
- void *priv;
-};
-
-struct mtk_scp {
- struct device *dev;
- struct rproc *rproc;
- struct clk *clk;
- void __iomem *reg_base;
- void __iomem *sram_base;
- size_t sram_size;
-
- struct share_obj *recv_buf;
- struct share_obj *send_buf;
- struct scp_run run;
- struct mutex scp_mutex; /* for protecting mtk_scp data structure */
- struct scp_ipi_desc ipi_desc[SCP_IPI_MAX];
- bool ipi_id_ack[SCP_IPI_MAX];
- wait_queue_head_t ack_wq;
-
- void __iomem *cpu_addr;
- phys_addr_t phys_addr;
- size_t dram_size;
-};
-
-/**
- * struct share_obj - SRAM buffer shared with
- * AP and SCP
- *
- * @id: IPI id
- * @len: share buffer length
- * @share_buf: share buffer data
- */
-struct share_obj {
- s32 id;
- u32 len;
- u8 share_buf[288];
-};
-
-int scp_ipi_register(struct platform_device *pdev,
- enum scp_ipi_id id,
- scp_ipi_handler_t handler,
- const char *name,
- void *priv)
-{
- struct mtk_scp *scp = platform_get_drvdata(pdev);
- struct scp_ipi_desc *ipi_desc;
-
- if (!scp) {
- dev_err(&pdev->dev, "scp device is not ready\n");
- return -EPROBE_DEFER;
- }
-
- if (WARN(id < 0 || id >= SCP_IPI_MAX || handler == NULL,
- "register scp ipi id %d with invalid arguments\n", id))
- return -EINVAL;
-
- ipi_desc = scp->ipi_desc;
- ipi_desc[id].name = name;
- ipi_desc[id].handler = handler;
- ipi_desc[id].priv = priv;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(scp_ipi_register);
-
-int scp_ipi_send(struct platform_device *pdev,
- enum scp_ipi_id id,
- void *buf,
- unsigned int len,
- unsigned int wait)
-{
- struct mtk_scp *scp = platform_get_drvdata(pdev);
- struct share_obj *send_obj = scp->send_buf;
- unsigned long timeout;
- int ret;
-
- if (WARN(id <= SCP_IPI_INIT || id >= SCP_IPI_MAX ||
- len > sizeof(send_obj->share_buf) || !buf,
- "failed to send ipi message\n"))
- return -EINVAL;
-
- ret = clk_prepare_enable(scp->clk);
- if (ret) {
- dev_err(scp->dev, "failed to enable clock\n");
- return ret;
- }
-
- mutex_lock(&scp->scp_mutex);
-
- /* Wait until SCP receives the last command */
- timeout = jiffies + msecs_to_jiffies(2000);
- do {
- if (time_after(jiffies, timeout)) {
- dev_err(scp->dev, "scp_ipi_send: IPI timeout!\n");
- ret = -EIO;
- mutex_unlock(&scp->scp_mutex);
- goto clock_disable;
- }
- } while (readl(scp->reg_base + MT8183_HOST_TO_SCP));
-
- memcpy(send_obj->share_buf, buf, len);
- send_obj->len = len;
- send_obj->id = id;
-
- scp->ipi_id_ack[id] = false;
- /* send the command to SCP */
- writel(MT8183_HOST_IPC_INT_BIT, scp->reg_base + MT8183_HOST_TO_SCP);
-
- mutex_unlock(&scp->scp_mutex);
-
- if (wait) {
- /* wait for SCP's ACK */
- timeout = msecs_to_jiffies(wait);
- ret = wait_event_timeout(scp->ack_wq,
- scp->ipi_id_ack[id],
- timeout);
- scp->ipi_id_ack[id] = false;
- if (WARN(!ret,
- "scp ipi %d ack time out !", id))
- ret = -EIO;
- else
- ret = 0;
- }
-
-clock_disable:
- clk_disable_unprepare(scp->clk);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(scp_ipi_send);
-
struct platform_device *scp_get_plat_device(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
diff --git a/drivers/remoteproc/mtk_scp_ipi.c b/drivers/remoteproc/mtk_scp_ipi.c
new file mode 100644
index 00000000000000..3aa18a387056d3
--- /dev/null
+++ b/drivers/remoteproc/mtk_scp_ipi.c
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2018 MediaTek Inc.
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_data/mtk_scp.h>
+#include <linux/platform_device.h>
+
+#include "mtk_common.h"
+
+int scp_ipi_register(struct platform_device *pdev,
+ enum scp_ipi_id id,
+ scp_ipi_handler_t handler,
+ const char *name,
+ void *priv)
+{
+ struct mtk_scp *scp = platform_get_drvdata(pdev);
+ struct scp_ipi_desc *ipi_desc;
+
+ if (!scp) {
+ dev_err(&pdev->dev, "scp device is not ready\n");
+ return -EPROBE_DEFER;
+ }
+
+ if (WARN(id < 0 || id >= SCP_IPI_MAX || handler == NULL,
+ "register scp ipi id %d with invalid arguments\n", id))
+ return -EINVAL;
+
+ ipi_desc = scp->ipi_desc;
+ ipi_desc[id].name = name;
+ ipi_desc[id].handler = handler;
+ ipi_desc[id].priv = priv;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(scp_ipi_register);
+
+int scp_ipi_send(struct platform_device *pdev,
+ enum scp_ipi_id id,
+ void *buf,
+ unsigned int len,
+ unsigned int wait)
+{
+ struct mtk_scp *scp = platform_get_drvdata(pdev);
+ struct share_obj *send_obj = scp->send_buf;
+ unsigned long timeout;
+ int ret;
+
+ if (WARN(id <= SCP_IPI_INIT || id >= SCP_IPI_MAX ||
+ len > sizeof(send_obj->share_buf) || !buf,
+ "failed to send ipi message\n"))
+ return -EINVAL;
+
+ ret = clk_prepare_enable(scp->clk);
+ if (ret) {
+ dev_err(scp->dev, "failed to enable clock\n");
+ return ret;
+ }
+
+ mutex_lock(&scp->scp_mutex);
+
+ /* Wait until SCP receives the last command */
+ timeout = jiffies + msecs_to_jiffies(2000);
+ do {
+ if (time_after(jiffies, timeout)) {
+ dev_err(scp->dev, "scp_ipi_send: IPI timeout!\n");
+ ret = -EIO;
+ mutex_unlock(&scp->scp_mutex);
+ goto clock_disable;
+ }
+ } while (readl(scp->reg_base + MT8183_HOST_TO_SCP));
+
+ memcpy(send_obj->share_buf, buf, len);
+ send_obj->len = len;
+ send_obj->id = id;
+
+ scp->ipi_id_ack[id] = false;
+ /* send the command to SCP */
+ writel(MT8183_HOST_IPC_INT_BIT, scp->reg_base + MT8183_HOST_TO_SCP);
+
+ mutex_unlock(&scp->scp_mutex);
+
+ if (wait) {
+ /* wait for SCP's ACK */
+ timeout = msecs_to_jiffies(wait);
+ ret = wait_event_timeout(scp->ack_wq,
+ scp->ipi_id_ack[id],
+ timeout);
+ scp->ipi_id_ack[id] = false;
+ if (WARN(!ret,
+ "scp ipi %d ack time out !", id))
+ ret = -EIO;
+ else
+ ret = 0;
+ }
+
+clock_disable:
+ clk_disable_unprepare(scp->clk);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(scp_ipi_send);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MediaTek scp IPI interface");
--
2.20.1.97.g81188d93c3-goog
Hi,
On Mon, Jan 7, 2019 at 9:26 PM Pi-Hsun Shih <[email protected]> wrote:
>
> Move the IPI interface into a separate file mtk_scp_ipi.c, so the things
> that use the interface only can depend on the module only.
>
> Signed-off-by: Pi-Hsun Shih <[email protected]>
> ---
> Changes from v1:
> - Resolved conflict because of change in Patch 2.
> ---
> drivers/remoteproc/Makefile | 2 +-
> drivers/remoteproc/mtk_common.h | 73 +++++++++++++++
> drivers/remoteproc/mtk_scp.c | 154 +------------------------------
The fact that you remove a bunch of stuff from mtk_scp.c makes me
think that we should probably reorganize the patches. The series here
shows the history of how we developed this, but for upstreaming
purpose, we want independent, small-ish patches.
Maybe 2/6 should contain just basic mtk_scp code with no IPI. 3/6 IPI
only, and _maybe_ 4/6 rpmsg should be folded into 3/6?
Thanks,
> drivers/remoteproc/mtk_scp_ipi.c | 108 ++++++++++++++++++++++
> 4 files changed, 183 insertions(+), 154 deletions(-)
> create mode 100644 drivers/remoteproc/mtk_common.h
> create mode 100644 drivers/remoteproc/mtk_scp_ipi.c
>
> diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
> index 98e3498dbbe0e2..16b3e5e7a81c8e 100644
> --- a/drivers/remoteproc/Makefile
> +++ b/drivers/remoteproc/Makefile
> @@ -10,7 +10,7 @@ remoteproc-y += remoteproc_sysfs.o
> remoteproc-y += remoteproc_virtio.o
> remoteproc-y += remoteproc_elf_loader.o
> obj-$(CONFIG_IMX_REMOTEPROC) += imx_rproc.o
> -obj-$(CONFIG_MTK_SCP) += mtk_scp.o
> +obj-$(CONFIG_MTK_SCP) += mtk_scp.o mtk_scp_ipi.o
> obj-$(CONFIG_OMAP_REMOTEPROC) += omap_remoteproc.o
> obj-$(CONFIG_WKUP_M3_RPROC) += wkup_m3_rproc.o
> obj-$(CONFIG_DA8XX_REMOTEPROC) += da8xx_remoteproc.o
> diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
> new file mode 100644
> index 00000000000000..e97287a4eb25cc
> --- /dev/null
> +++ b/drivers/remoteproc/mtk_common.h
> @@ -0,0 +1,73 @@
> +// SPDX-License-Identifier: GPL-2.0
> +//
> +// Copyright (c) 2018 MediaTek Inc.
> +
> +#ifndef __RPROC_MTK_COMMON_H
> +#define __RPROC_MTK_COMMON_H
> +
> +#include <linux/interrupt.h>
> +#include <linux/kernel.h>
> +#include <linux/platform_device.h>
> +#include <linux/remoteproc.h>
> +
> +#define MT8183_SW_RSTN 0x0
> +#define MT8183_SW_RSTN_BIT BIT(0)
> +#define MT8183_SCP_TO_HOST 0x1C
> +#define MT8183_SCP_IPC_INT_BIT BIT(0)
> +#define MT8183_SCP_WDT_INT_BIT BIT(8)
> +#define MT8183_HOST_TO_SCP 0x28
> +#define MT8183_HOST_IPC_INT_BIT BIT(0)
> +#define MT8183_SCP_SRAM_PDN 0x402C
> +
> +#define SCP_FW_VER_LEN 32
> +
> +struct scp_run {
> + u32 signaled;
> + s8 fw_ver[SCP_FW_VER_LEN];
> + u32 dec_capability;
> + u32 enc_capability;
> + wait_queue_head_t wq;
> +};
> +
> +struct scp_ipi_desc {
> + scp_ipi_handler_t handler;
> + const char *name;
> + void *priv;
> +};
> +
> +struct mtk_scp {
> + struct device *dev;
> + struct rproc *rproc;
> + struct clk *clk;
> + void __iomem *reg_base;
> + void __iomem *sram_base;
> + size_t sram_size;
> +
> + struct share_obj *recv_buf;
> + struct share_obj *send_buf;
> + struct scp_run run;
> + struct mutex scp_mutex; /* for protecting mtk_scp data structure */
> + struct scp_ipi_desc ipi_desc[SCP_IPI_MAX];
> + bool ipi_id_ack[SCP_IPI_MAX];
> + wait_queue_head_t ack_wq;
> +
> + void __iomem *cpu_addr;
> + phys_addr_t phys_addr;
> + size_t dram_size;
> +};
> +
> +/**
> + * struct share_obj - SRAM buffer shared with
> + * AP and SCP
> + *
> + * @id: IPI id
> + * @len: share buffer length
> + * @share_buf: share buffer data
> + */
> +struct share_obj {
> + s32 id;
> + u32 len;
> + u8 share_buf[288];
> +};
> +
> +#endif
> diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
> index 6e2e17a227d018..3e84c696523436 100644
> --- a/drivers/remoteproc/mtk_scp.c
> +++ b/drivers/remoteproc/mtk_scp.c
> @@ -13,163 +13,11 @@
> #include <linux/platform_device.h>
> #include <linux/remoteproc.h>
>
> +#include "mtk_common.h"
> #include "remoteproc_internal.h"
>
> -#define MT8183_SW_RSTN 0x0
> -#define MT8183_SW_RSTN_BIT BIT(0)
> -#define MT8183_SCP_TO_HOST 0x1C
> -#define MT8183_SCP_IPC_INT_BIT BIT(0)
> -#define MT8183_SCP_WDT_INT_BIT BIT(8)
> -#define MT8183_HOST_TO_SCP 0x28
> -#define MT8183_HOST_IPC_INT_BIT BIT(0)
> -#define MT8183_SCP_SRAM_PDN 0x402C
> -
> -#define SCP_FW_VER_LEN 32
> -
> #define MAX_CODE_SIZE 0x500000
>
> -struct scp_run {
> - u32 signaled;
> - s8 fw_ver[SCP_FW_VER_LEN];
> - u32 dec_capability;
> - u32 enc_capability;
> - wait_queue_head_t wq;
> -};
> -
> -struct scp_ipi_desc {
> - scp_ipi_handler_t handler;
> - const char *name;
> - void *priv;
> -};
> -
> -struct mtk_scp {
> - struct device *dev;
> - struct rproc *rproc;
> - struct clk *clk;
> - void __iomem *reg_base;
> - void __iomem *sram_base;
> - size_t sram_size;
> -
> - struct share_obj *recv_buf;
> - struct share_obj *send_buf;
> - struct scp_run run;
> - struct mutex scp_mutex; /* for protecting mtk_scp data structure */
> - struct scp_ipi_desc ipi_desc[SCP_IPI_MAX];
> - bool ipi_id_ack[SCP_IPI_MAX];
> - wait_queue_head_t ack_wq;
> -
> - void __iomem *cpu_addr;
> - phys_addr_t phys_addr;
> - size_t dram_size;
> -};
> -
> -/**
> - * struct share_obj - SRAM buffer shared with
> - * AP and SCP
> - *
> - * @id: IPI id
> - * @len: share buffer length
> - * @share_buf: share buffer data
> - */
> -struct share_obj {
> - s32 id;
> - u32 len;
> - u8 share_buf[288];
> -};
> -
> -int scp_ipi_register(struct platform_device *pdev,
> - enum scp_ipi_id id,
> - scp_ipi_handler_t handler,
> - const char *name,
> - void *priv)
> -{
> - struct mtk_scp *scp = platform_get_drvdata(pdev);
> - struct scp_ipi_desc *ipi_desc;
> -
> - if (!scp) {
> - dev_err(&pdev->dev, "scp device is not ready\n");
> - return -EPROBE_DEFER;
> - }
> -
> - if (WARN(id < 0 || id >= SCP_IPI_MAX || handler == NULL,
> - "register scp ipi id %d with invalid arguments\n", id))
> - return -EINVAL;
> -
> - ipi_desc = scp->ipi_desc;
> - ipi_desc[id].name = name;
> - ipi_desc[id].handler = handler;
> - ipi_desc[id].priv = priv;
> -
> - return 0;
> -}
> -EXPORT_SYMBOL_GPL(scp_ipi_register);
> -
> -int scp_ipi_send(struct platform_device *pdev,
> - enum scp_ipi_id id,
> - void *buf,
> - unsigned int len,
> - unsigned int wait)
> -{
> - struct mtk_scp *scp = platform_get_drvdata(pdev);
> - struct share_obj *send_obj = scp->send_buf;
> - unsigned long timeout;
> - int ret;
> -
> - if (WARN(id <= SCP_IPI_INIT || id >= SCP_IPI_MAX ||
> - len > sizeof(send_obj->share_buf) || !buf,
> - "failed to send ipi message\n"))
> - return -EINVAL;
> -
> - ret = clk_prepare_enable(scp->clk);
> - if (ret) {
> - dev_err(scp->dev, "failed to enable clock\n");
> - return ret;
> - }
> -
> - mutex_lock(&scp->scp_mutex);
> -
> - /* Wait until SCP receives the last command */
> - timeout = jiffies + msecs_to_jiffies(2000);
> - do {
> - if (time_after(jiffies, timeout)) {
> - dev_err(scp->dev, "scp_ipi_send: IPI timeout!\n");
> - ret = -EIO;
> - mutex_unlock(&scp->scp_mutex);
> - goto clock_disable;
> - }
> - } while (readl(scp->reg_base + MT8183_HOST_TO_SCP));
> -
> - memcpy(send_obj->share_buf, buf, len);
> - send_obj->len = len;
> - send_obj->id = id;
> -
> - scp->ipi_id_ack[id] = false;
> - /* send the command to SCP */
> - writel(MT8183_HOST_IPC_INT_BIT, scp->reg_base + MT8183_HOST_TO_SCP);
> -
> - mutex_unlock(&scp->scp_mutex);
> -
> - if (wait) {
> - /* wait for SCP's ACK */
> - timeout = msecs_to_jiffies(wait);
> - ret = wait_event_timeout(scp->ack_wq,
> - scp->ipi_id_ack[id],
> - timeout);
> - scp->ipi_id_ack[id] = false;
> - if (WARN(!ret,
> - "scp ipi %d ack time out !", id))
> - ret = -EIO;
> - else
> - ret = 0;
> - }
> -
> -clock_disable:
> - clk_disable_unprepare(scp->clk);
> -
> - return ret;
> -}
> -EXPORT_SYMBOL_GPL(scp_ipi_send);
> -
> struct platform_device *scp_get_plat_device(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> diff --git a/drivers/remoteproc/mtk_scp_ipi.c b/drivers/remoteproc/mtk_scp_ipi.c
> new file mode 100644
> index 00000000000000..3aa18a387056d3
> --- /dev/null
> +++ b/drivers/remoteproc/mtk_scp_ipi.c
> @@ -0,0 +1,108 @@
> +// SPDX-License-Identifier: GPL-2.0
> +//
> +// Copyright (c) 2018 MediaTek Inc.
> +
> +#include <linux/clk.h>
> +#include <linux/err.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/platform_data/mtk_scp.h>
> +#include <linux/platform_device.h>
> +
> +#include "mtk_common.h"
> +
> +int scp_ipi_register(struct platform_device *pdev,
> + enum scp_ipi_id id,
> + scp_ipi_handler_t handler,
> + const char *name,
> + void *priv)
> +{
> + struct mtk_scp *scp = platform_get_drvdata(pdev);
> + struct scp_ipi_desc *ipi_desc;
> +
> + if (!scp) {
> + dev_err(&pdev->dev, "scp device is not ready\n");
> + return -EPROBE_DEFER;
> + }
> +
> + if (WARN(id < 0 || id >= SCP_IPI_MAX || handler == NULL,
> + "register scp ipi id %d with invalid arguments\n", id))
> + return -EINVAL;
> +
> + ipi_desc = scp->ipi_desc;
> + ipi_desc[id].name = name;
> + ipi_desc[id].handler = handler;
> + ipi_desc[id].priv = priv;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(scp_ipi_register);
> +
> +int scp_ipi_send(struct platform_device *pdev,
> + enum scp_ipi_id id,
> + void *buf,
> + unsigned int len,
> + unsigned int wait)
> +{
> + struct mtk_scp *scp = platform_get_drvdata(pdev);
> + struct share_obj *send_obj = scp->send_buf;
> + unsigned long timeout;
> + int ret;
> +
> + if (WARN(id <= SCP_IPI_INIT || id >= SCP_IPI_MAX ||
> + len > sizeof(send_obj->share_buf) || !buf,
> + "failed to send ipi message\n"))
> + return -EINVAL;
> +
> + ret = clk_prepare_enable(scp->clk);
> + if (ret) {
> + dev_err(scp->dev, "failed to enable clock\n");
> + return ret;
> + }
> +
> + mutex_lock(&scp->scp_mutex);
> +
> + /* Wait until SCP receives the last command */
> + timeout = jiffies + msecs_to_jiffies(2000);
> + do {
> + if (time_after(jiffies, timeout)) {
> + dev_err(scp->dev, "scp_ipi_send: IPI timeout!\n");
> + ret = -EIO;
> + mutex_unlock(&scp->scp_mutex);
> + goto clock_disable;
> + }
> + } while (readl(scp->reg_base + MT8183_HOST_TO_SCP));
> +
> + memcpy(send_obj->share_buf, buf, len);
> + send_obj->len = len;
> + send_obj->id = id;
> +
> + scp->ipi_id_ack[id] = false;
> + /* send the command to SCP */
> + writel(MT8183_HOST_IPC_INT_BIT, scp->reg_base + MT8183_HOST_TO_SCP);
> +
> + mutex_unlock(&scp->scp_mutex);
> +
> + if (wait) {
> + /* wait for SCP's ACK */
> + timeout = msecs_to_jiffies(wait);
> + ret = wait_event_timeout(scp->ack_wq,
> + scp->ipi_id_ack[id],
> + timeout);
> + scp->ipi_id_ack[id] = false;
> + if (WARN(!ret,
> + "scp ipi %d ack time out !", id))
> + ret = -EIO;
> + else
> + ret = 0;
> + }
> +
> +clock_disable:
> + clk_disable_unprepare(scp->clk);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(scp_ipi_send);
> +
> +MODULE_LICENSE("GPL v2");
> +MODULE_DESCRIPTION("MediaTek scp IPI interface");
> --
> 2.20.1.97.g81188d93c3-goog
>
On Sat, Jan 19, 2019 at 5:04 AM Nicolas Boichat <[email protected]> wrote:
>
> Hi,
>
> On Mon, Jan 7, 2019 at 9:26 PM Pi-Hsun Shih <[email protected]> wrote:
> >
> > Move the IPI interface into a separate file mtk_scp_ipi.c, so the things
> > that use the interface only can depend on the module only.
> >
> > Signed-off-by: Pi-Hsun Shih <[email protected]>
> > ---
> > Changes from v1:
> > - Resolved conflict because of change in Patch 2.
> > ---
> > drivers/remoteproc/Makefile | 2 +-
> > drivers/remoteproc/mtk_common.h | 73 +++++++++++++++
> > drivers/remoteproc/mtk_scp.c | 154 +------------------------------
>
> The fact that you remove a bunch of stuff from mtk_scp.c makes me
> think that we should probably reorganize the patches. The series here
> shows the history of how we developed this, but for upstreaming
> purpose, we want independent, small-ish patches.
>
> Maybe 2/6 should contain just basic mtk_scp code with no IPI. 3/6 IPI
> only, and _maybe_ 4/6 rpmsg should be folded into 3/6?
>
> Thanks,
>
I think it's hard to have mtk_scp code without IPI, since the
initialization itself depends on IPI.
I'll fold 3/6 into 2/6 in v3.
> > drivers/remoteproc/mtk_scp_ipi.c | 108 ++++++++++++++++++++++
> > 4 files changed, 183 insertions(+), 154 deletions(-)
> > create mode 100644 drivers/remoteproc/mtk_common.h
> > create mode 100644 drivers/remoteproc/mtk_scp_ipi.c
> >
> > diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
> > index 98e3498dbbe0e2..16b3e5e7a81c8e 100644
> > --- a/drivers/remoteproc/Makefile
> > +++ b/drivers/remoteproc/Makefile
> > @@ -10,7 +10,7 @@ remoteproc-y += remoteproc_sysfs.o
> > remoteproc-y += remoteproc_virtio.o
> > remoteproc-y += remoteproc_elf_loader.o
> > obj-$(CONFIG_IMX_REMOTEPROC) += imx_rproc.o
> > -obj-$(CONFIG_MTK_SCP) += mtk_scp.o
> > +obj-$(CONFIG_MTK_SCP) += mtk_scp.o mtk_scp_ipi.o
> > obj-$(CONFIG_OMAP_REMOTEPROC) += omap_remoteproc.o
> > obj-$(CONFIG_WKUP_M3_RPROC) += wkup_m3_rproc.o
> > obj-$(CONFIG_DA8XX_REMOTEPROC) += da8xx_remoteproc.o
> > diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
> > new file mode 100644
> > index 00000000000000..e97287a4eb25cc
> > --- /dev/null
> > +++ b/drivers/remoteproc/mtk_common.h
> > @@ -0,0 +1,73 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +//
> > +// Copyright (c) 2018 MediaTek Inc.
> > +
> > +#ifndef __RPROC_MTK_COMMON_H
> > +#define __RPROC_MTK_COMMON_H
> > +
> > +#include <linux/interrupt.h>
> > +#include <linux/kernel.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/remoteproc.h>
> > +
> > +#define MT8183_SW_RSTN 0x0
> > +#define MT8183_SW_RSTN_BIT BIT(0)
> > +#define MT8183_SCP_TO_HOST 0x1C
> > +#define MT8183_SCP_IPC_INT_BIT BIT(0)
> > +#define MT8183_SCP_WDT_INT_BIT BIT(8)
> > +#define MT8183_HOST_TO_SCP 0x28
> > +#define MT8183_HOST_IPC_INT_BIT BIT(0)
> > +#define MT8183_SCP_SRAM_PDN 0x402C
> > +
> > +#define SCP_FW_VER_LEN 32
> > +
> > +struct scp_run {
> > + u32 signaled;
> > + s8 fw_ver[SCP_FW_VER_LEN];
> > + u32 dec_capability;
> > + u32 enc_capability;
> > + wait_queue_head_t wq;
> > +};
> > +
> > +struct scp_ipi_desc {
> > + scp_ipi_handler_t handler;
> > + const char *name;
> > + void *priv;
> > +};
> > +
> > +struct mtk_scp {
> > + struct device *dev;
> > + struct rproc *rproc;
> > + struct clk *clk;
> > + void __iomem *reg_base;
> > + void __iomem *sram_base;
> > + size_t sram_size;
> > +
> > + struct share_obj *recv_buf;
> > + struct share_obj *send_buf;
> > + struct scp_run run;
> > + struct mutex scp_mutex; /* for protecting mtk_scp data structure */
> > + struct scp_ipi_desc ipi_desc[SCP_IPI_MAX];
> > + bool ipi_id_ack[SCP_IPI_MAX];
> > + wait_queue_head_t ack_wq;
> > +
> > + void __iomem *cpu_addr;
> > + phys_addr_t phys_addr;
> > + size_t dram_size;
> > +};
> > +
> > +/**
> > + * struct share_obj - SRAM buffer shared with
> > + * AP and SCP
> > + *
> > + * @id: IPI id
> > + * @len: share buffer length
> > + * @share_buf: share buffer data
> > + */
> > +struct share_obj {
> > + s32 id;
> > + u32 len;
> > + u8 share_buf[288];
> > +};
> > +
> > +#endif
> > diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
> > index 6e2e17a227d018..3e84c696523436 100644
> > --- a/drivers/remoteproc/mtk_scp.c
> > +++ b/drivers/remoteproc/mtk_scp.c
> > @@ -13,163 +13,11 @@
> > #include <linux/platform_device.h>
> > #include <linux/remoteproc.h>
> >
> > +#include "mtk_common.h"
> > #include "remoteproc_internal.h"
> >
> > -#define MT8183_SW_RSTN 0x0
> > -#define MT8183_SW_RSTN_BIT BIT(0)
> > -#define MT8183_SCP_TO_HOST 0x1C
> > -#define MT8183_SCP_IPC_INT_BIT BIT(0)
> > -#define MT8183_SCP_WDT_INT_BIT BIT(8)
> > -#define MT8183_HOST_TO_SCP 0x28
> > -#define MT8183_HOST_IPC_INT_BIT BIT(0)
> > -#define MT8183_SCP_SRAM_PDN 0x402C
> > -
> > -#define SCP_FW_VER_LEN 32
> > -
> > #define MAX_CODE_SIZE 0x500000
> >
> > -struct scp_run {
> > - u32 signaled;
> > - s8 fw_ver[SCP_FW_VER_LEN];
> > - u32 dec_capability;
> > - u32 enc_capability;
> > - wait_queue_head_t wq;
> > -};
> > -
> > -struct scp_ipi_desc {
> > - scp_ipi_handler_t handler;
> > - const char *name;
> > - void *priv;
> > -};
> > -
> > -struct mtk_scp {
> > - struct device *dev;
> > - struct rproc *rproc;
> > - struct clk *clk;
> > - void __iomem *reg_base;
> > - void __iomem *sram_base;
> > - size_t sram_size;
> > -
> > - struct share_obj *recv_buf;
> > - struct share_obj *send_buf;
> > - struct scp_run run;
> > - struct mutex scp_mutex; /* for protecting mtk_scp data structure */
> > - struct scp_ipi_desc ipi_desc[SCP_IPI_MAX];
> > - bool ipi_id_ack[SCP_IPI_MAX];
> > - wait_queue_head_t ack_wq;
> > -
> > - void __iomem *cpu_addr;
> > - phys_addr_t phys_addr;
> > - size_t dram_size;
> > -};
> > -
> > -/**
> > - * struct share_obj - SRAM buffer shared with
> > - * AP and SCP
> > - *
> > - * @id: IPI id
> > - * @len: share buffer length
> > - * @share_buf: share buffer data
> > - */
> > -struct share_obj {
> > - s32 id;
> > - u32 len;
> > - u8 share_buf[288];
> > -};
> > -
> > -int scp_ipi_register(struct platform_device *pdev,
> > - enum scp_ipi_id id,
> > - scp_ipi_handler_t handler,
> > - const char *name,
> > - void *priv)
> > -{
> > - struct mtk_scp *scp = platform_get_drvdata(pdev);
> > - struct scp_ipi_desc *ipi_desc;
> > -
> > - if (!scp) {
> > - dev_err(&pdev->dev, "scp device is not ready\n");
> > - return -EPROBE_DEFER;
> > - }
> > -
> > - if (WARN(id < 0 || id >= SCP_IPI_MAX || handler == NULL,
> > - "register scp ipi id %d with invalid arguments\n", id))
> > - return -EINVAL;
> > -
> > - ipi_desc = scp->ipi_desc;
> > - ipi_desc[id].name = name;
> > - ipi_desc[id].handler = handler;
> > - ipi_desc[id].priv = priv;
> > -
> > - return 0;
> > -}
> > -EXPORT_SYMBOL_GPL(scp_ipi_register);
> > -
> > -int scp_ipi_send(struct platform_device *pdev,
> > - enum scp_ipi_id id,
> > - void *buf,
> > - unsigned int len,
> > - unsigned int wait)
> > -{
> > - struct mtk_scp *scp = platform_get_drvdata(pdev);
> > - struct share_obj *send_obj = scp->send_buf;
> > - unsigned long timeout;
> > - int ret;
> > -
> > - if (WARN(id <= SCP_IPI_INIT || id >= SCP_IPI_MAX ||
> > - len > sizeof(send_obj->share_buf) || !buf,
> > - "failed to send ipi message\n"))
> > - return -EINVAL;
> > -
> > - ret = clk_prepare_enable(scp->clk);
> > - if (ret) {
> > - dev_err(scp->dev, "failed to enable clock\n");
> > - return ret;
> > - }
> > -
> > - mutex_lock(&scp->scp_mutex);
> > -
> > - /* Wait until SCP receives the last command */
> > - timeout = jiffies + msecs_to_jiffies(2000);
> > - do {
> > - if (time_after(jiffies, timeout)) {
> > - dev_err(scp->dev, "scp_ipi_send: IPI timeout!\n");
> > - ret = -EIO;
> > - mutex_unlock(&scp->scp_mutex);
> > - goto clock_disable;
> > - }
> > - } while (readl(scp->reg_base + MT8183_HOST_TO_SCP));
> > -
> > - memcpy(send_obj->share_buf, buf, len);
> > - send_obj->len = len;
> > - send_obj->id = id;
> > -
> > - scp->ipi_id_ack[id] = false;
> > - /* send the command to SCP */
> > - writel(MT8183_HOST_IPC_INT_BIT, scp->reg_base + MT8183_HOST_TO_SCP);
> > -
> > - mutex_unlock(&scp->scp_mutex);
> > -
> > - if (wait) {
> > - /* wait for SCP's ACK */
> > - timeout = msecs_to_jiffies(wait);
> > - ret = wait_event_timeout(scp->ack_wq,
> > - scp->ipi_id_ack[id],
> > - timeout);
> > - scp->ipi_id_ack[id] = false;
> > - if (WARN(!ret,
> > - "scp ipi %d ack time out !", id))
> > - ret = -EIO;
> > - else
> > - ret = 0;
> > - }
> > -
> > -clock_disable:
> > - clk_disable_unprepare(scp->clk);
> > -
> > - return ret;
> > -}
> > -EXPORT_SYMBOL_GPL(scp_ipi_send);
> > -
> > struct platform_device *scp_get_plat_device(struct platform_device *pdev)
> > {
> > struct device *dev = &pdev->dev;
> > diff --git a/drivers/remoteproc/mtk_scp_ipi.c b/drivers/remoteproc/mtk_scp_ipi.c
> > new file mode 100644
> > index 00000000000000..3aa18a387056d3
> > --- /dev/null
> > +++ b/drivers/remoteproc/mtk_scp_ipi.c
> > @@ -0,0 +1,108 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +//
> > +// Copyright (c) 2018 MediaTek Inc.
> > +
> > +#include <linux/clk.h>
> > +#include <linux/err.h>
> > +#include <linux/kernel.h>
> > +#include <linux/module.h>
> > +#include <linux/platform_data/mtk_scp.h>
> > +#include <linux/platform_device.h>
> > +
> > +#include "mtk_common.h"
> > +
> > +int scp_ipi_register(struct platform_device *pdev,
> > + enum scp_ipi_id id,
> > + scp_ipi_handler_t handler,
> > + const char *name,
> > + void *priv)
> > +{
> > + struct mtk_scp *scp = platform_get_drvdata(pdev);
> > + struct scp_ipi_desc *ipi_desc;
> > +
> > + if (!scp) {
> > + dev_err(&pdev->dev, "scp device is not ready\n");
> > + return -EPROBE_DEFER;
> > + }
> > +
> > + if (WARN(id < 0 || id >= SCP_IPI_MAX || handler == NULL,
> > + "register scp ipi id %d with invalid arguments\n", id))
> > + return -EINVAL;
> > +
> > + ipi_desc = scp->ipi_desc;
> > + ipi_desc[id].name = name;
> > + ipi_desc[id].handler = handler;
> > + ipi_desc[id].priv = priv;
> > +
> > + return 0;
> > +}
> > +EXPORT_SYMBOL_GPL(scp_ipi_register);
> > +
> > +int scp_ipi_send(struct platform_device *pdev,
> > + enum scp_ipi_id id,
> > + void *buf,
> > + unsigned int len,
> > + unsigned int wait)
> > +{
> > + struct mtk_scp *scp = platform_get_drvdata(pdev);
> > + struct share_obj *send_obj = scp->send_buf;
> > + unsigned long timeout;
> > + int ret;
> > +
> > + if (WARN(id <= SCP_IPI_INIT || id >= SCP_IPI_MAX ||
> > + len > sizeof(send_obj->share_buf) || !buf,
> > + "failed to send ipi message\n"))
> > + return -EINVAL;
> > +
> > + ret = clk_prepare_enable(scp->clk);
> > + if (ret) {
> > + dev_err(scp->dev, "failed to enable clock\n");
> > + return ret;
> > + }
> > +
> > + mutex_lock(&scp->scp_mutex);
> > +
> > + /* Wait until SCP receives the last command */
> > + timeout = jiffies + msecs_to_jiffies(2000);
> > + do {
> > + if (time_after(jiffies, timeout)) {
> > + dev_err(scp->dev, "scp_ipi_send: IPI timeout!\n");
> > + ret = -EIO;
> > + mutex_unlock(&scp->scp_mutex);
> > + goto clock_disable;
> > + }
> > + } while (readl(scp->reg_base + MT8183_HOST_TO_SCP));
> > +
> > + memcpy(send_obj->share_buf, buf, len);
> > + send_obj->len = len;
> > + send_obj->id = id;
> > +
> > + scp->ipi_id_ack[id] = false;
> > + /* send the command to SCP */
> > + writel(MT8183_HOST_IPC_INT_BIT, scp->reg_base + MT8183_HOST_TO_SCP);
> > +
> > + mutex_unlock(&scp->scp_mutex);
> > +
> > + if (wait) {
> > + /* wait for SCP's ACK */
> > + timeout = msecs_to_jiffies(wait);
> > + ret = wait_event_timeout(scp->ack_wq,
> > + scp->ipi_id_ack[id],
> > + timeout);
> > + scp->ipi_id_ack[id] = false;
> > + if (WARN(!ret,
> > + "scp ipi %d ack time out !", id))
> > + ret = -EIO;
> > + else
> > + ret = 0;
> > + }
> > +
> > +clock_disable:
> > + clk_disable_unprepare(scp->clk);
> > +
> > + return ret;
> > +}
> > +EXPORT_SYMBOL_GPL(scp_ipi_send);
> > +
> > +MODULE_LICENSE("GPL v2");
> > +MODULE_DESCRIPTION("MediaTek scp IPI interface");
> > --
> > 2.20.1.97.g81188d93c3-goog
> >