diff options
Diffstat (limited to 'drivers/fpga/dfl-afu-main.c')
| -rw-r--r-- | drivers/fpga/dfl-afu-main.c | 61 |
1 files changed, 60 insertions, 1 deletions
diff --git a/drivers/fpga/dfl-afu-main.c b/drivers/fpga/dfl-afu-main.c index f67a78d7e9ad..02baa6a227c0 100644 --- a/drivers/fpga/dfl-afu-main.c +++ b/drivers/fpga/dfl-afu-main.c @@ -293,7 +293,11 @@ static int afu_release(struct inode *inode, struct file *filp) pdata = dev_get_platdata(&pdev->dev); - port_reset(pdev); + mutex_lock(&pdata->lock); + __port_reset(pdev); + afu_dma_region_destroy(pdata); + mutex_unlock(&pdata->lock); + dfl_feature_dev_use_end(pdata); return 0; @@ -364,6 +368,55 @@ static long afu_ioctl_get_region_info(struct dfl_feature_platform_data *pdata, return 0; } +static long +afu_ioctl_dma_map(struct dfl_feature_platform_data *pdata, void __user *arg) +{ + struct dfl_fpga_port_dma_map map; + unsigned long minsz; + long ret; + + minsz = offsetofend(struct dfl_fpga_port_dma_map, iova); + + if (copy_from_user(&map, arg, minsz)) + return -EFAULT; + + if (map.argsz < minsz || map.flags) + return -EINVAL; + + ret = afu_dma_map_region(pdata, map.user_addr, map.length, &map.iova); + if (ret) + return ret; + + if (copy_to_user(arg, &map, sizeof(map))) { + afu_dma_unmap_region(pdata, map.iova); + return -EFAULT; + } + + dev_dbg(&pdata->dev->dev, "dma map: ua=%llx, len=%llx, iova=%llx\n", + (unsigned long long)map.user_addr, + (unsigned long long)map.length, + (unsigned long long)map.iova); + + return 0; +} + +static long +afu_ioctl_dma_unmap(struct dfl_feature_platform_data *pdata, void __user *arg) +{ + struct dfl_fpga_port_dma_unmap unmap; + unsigned long minsz; + + minsz = offsetofend(struct dfl_fpga_port_dma_unmap, iova); + + if (copy_from_user(&unmap, arg, minsz)) + return -EFAULT; + + if (unmap.argsz < minsz || unmap.flags) + return -EINVAL; + + return afu_dma_unmap_region(pdata, unmap.iova); +} + static long afu_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { struct platform_device *pdev = filp->private_data; @@ -384,6 +437,10 @@ static long afu_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) return afu_ioctl_get_info(pdata, (void __user *)arg); case DFL_FPGA_PORT_GET_REGION_INFO: return afu_ioctl_get_region_info(pdata, (void __user *)arg); + case DFL_FPGA_PORT_DMA_MAP: + return afu_ioctl_dma_map(pdata, (void __user *)arg); + case DFL_FPGA_PORT_DMA_UNMAP: + return afu_ioctl_dma_unmap(pdata, (void __user *)arg); default: /* * Let sub-feature's ioctl function to handle the cmd @@ -460,6 +517,7 @@ static int afu_dev_init(struct platform_device *pdev) mutex_lock(&pdata->lock); dfl_fpga_pdata_set_private(pdata, afu); afu_mmio_region_init(pdata); + afu_dma_region_init(pdata); mutex_unlock(&pdata->lock); return 0; @@ -473,6 +531,7 @@ static int afu_dev_destroy(struct platform_device *pdev) mutex_lock(&pdata->lock); afu = dfl_fpga_pdata_get_private(pdata); afu_mmio_region_destroy(pdata); + afu_dma_region_destroy(pdata); dfl_fpga_pdata_set_private(pdata, NULL); mutex_unlock(&pdata->lock); |