diff options
| -rw-r--r-- | MAINTAINERS | 1 | ||||
| -rw-r--r-- | drivers/dma/xilinx/xdma.c | 81 | ||||
| -rw-r--r-- | include/linux/dma/amd_xdma.h | 16 |
3 files changed, 98 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index b768ad4e901b..7fdeab4c4baa 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -22897,6 +22897,7 @@ L: dmaengine@vger.kernel.org S: Supported F: drivers/dma/xilinx/xdma-regs.h F: drivers/dma/xilinx/xdma.c +F: include/linux/dma/amd_xdma.h F: include/linux/platform_data/amd_xdma.h XILINX ZYNQMP DPDMA DRIVER diff --git a/drivers/dma/xilinx/xdma.c b/drivers/dma/xilinx/xdma.c index 48efb75ef9b4..462109c61653 100644 --- a/drivers/dma/xilinx/xdma.c +++ b/drivers/dma/xilinx/xdma.c @@ -25,6 +25,7 @@ #include <linux/dmapool.h> #include <linux/regmap.h> #include <linux/dmaengine.h> +#include <linux/dma/amd_xdma.h> #include <linux/platform_device.h> #include <linux/platform_data/amd_xdma.h> #include <linux/dma-mapping.h> @@ -687,6 +688,7 @@ static int xdma_set_vector_reg(struct xdma_device *xdev, u32 vec_tbl_start, static int xdma_irq_init(struct xdma_device *xdev) { u32 irq = xdev->irq_start; + u32 user_irq_start; int i, j, ret; /* return failure if there are not enough IRQs */ @@ -729,6 +731,18 @@ static int xdma_irq_init(struct xdma_device *xdev) goto failed_init_c2h; } + /* config user IRQ registers if needed */ + user_irq_start = XDMA_CHAN_NUM(xdev); + if (xdev->irq_num > user_irq_start) { + ret = xdma_set_vector_reg(xdev, XDMA_IRQ_USER_VEC_NUM, + user_irq_start, + xdev->irq_num - user_irq_start); + if (ret) { + xdma_err(xdev, "failed to set user vectors: %d", ret); + goto failed_init_c2h; + } + } + /* enable interrupt */ ret = regmap_write(xdev->rmap, XDMA_IRQ_CHAN_INT_EN_W1S, ~0); if (ret) @@ -755,6 +769,73 @@ static bool xdma_filter_fn(struct dma_chan *chan, void *param) } /** + * xdma_disable_user_irq - Disable user interrupt + * @pdev: Pointer to the platform_device structure + * @irq_num: System IRQ number + */ +void xdma_disable_user_irq(struct platform_device *pdev, u32 irq_num) +{ + struct xdma_device *xdev = platform_get_drvdata(pdev); + u32 index; + + index = irq_num - xdev->irq_start; + if (index < XDMA_CHAN_NUM(xdev) || index >= xdev->irq_num) { + xdma_err(xdev, "invalid user irq number"); + return; + } + index -= XDMA_CHAN_NUM(xdev); + + regmap_write(xdev->rmap, XDMA_IRQ_USER_INT_EN_W1C, 1 << index); +} +EXPORT_SYMBOL(xdma_disable_user_irq); + +/** + * xdma_enable_user_irq - Enable user logic interrupt + * @pdev: Pointer to the platform_device structure + * @irq_num: System IRQ number + */ +int xdma_enable_user_irq(struct platform_device *pdev, u32 irq_num) +{ + struct xdma_device *xdev = platform_get_drvdata(pdev); + u32 index; + int ret; + + index = irq_num - xdev->irq_start; + if (index < XDMA_CHAN_NUM(xdev) || index >= xdev->irq_num) { + xdma_err(xdev, "invalid user irq number"); + return -EINVAL; + } + index -= XDMA_CHAN_NUM(xdev); + + ret = regmap_write(xdev->rmap, XDMA_IRQ_USER_INT_EN_W1S, 1 << index); + if (ret) + return ret; + + return 0; +} +EXPORT_SYMBOL(xdma_enable_user_irq); + +/** + * xdma_get_user_irq - Get system IRQ number + * @pdev: Pointer to the platform_device structure + * @user_irq_index: User logic IRQ wire index + * + * Return: The system IRQ number allocated for the given wire index. + */ +int xdma_get_user_irq(struct platform_device *pdev, u32 user_irq_index) +{ + struct xdma_device *xdev = platform_get_drvdata(pdev); + + if (XDMA_CHAN_NUM(xdev) + user_irq_index >= xdev->irq_num) { + xdma_err(xdev, "invalid user irq index"); + return -EINVAL; + } + + return xdev->irq_start + XDMA_CHAN_NUM(xdev) + user_irq_index; +} +EXPORT_SYMBOL(xdma_get_user_irq); + +/** * xdma_remove - Driver remove function * @pdev: Pointer to the platform_device structure */ diff --git a/include/linux/dma/amd_xdma.h b/include/linux/dma/amd_xdma.h new file mode 100644 index 000000000000..ceba69ed7cb4 --- /dev/null +++ b/include/linux/dma/amd_xdma.h @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) 2022, Advanced Micro Devices, Inc. + */ + +#ifndef _DMAENGINE_AMD_XDMA_H +#define _DMAENGINE_AMD_XDMA_H + +#include <linux/interrupt.h> +#include <linux/platform_device.h> + +int xdma_enable_user_irq(struct platform_device *pdev, u32 irq_num); +void xdma_disable_user_irq(struct platform_device *pdev, u32 irq_num); +int xdma_get_user_irq(struct platform_device *pdev, u32 user_irq_index); + +#endif /* _DMAENGINE_AMD_XDMA_H */ |