The patch adds IOMMU support for MFC driver.
Signed-off-by: Arun Kumar K <arun...@samsung.com>
---
This patch is tested on IOMMU support series [1] posted
by KyonHo Cho.
[1] https://lkml.org/lkml/2014/3/14/9
---
drivers/media/platform/s5p-mfc/s5p_mfc.c | 33 ++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c
b/drivers/media/platform/s5p-mfc/s5p_mfc.c
index 89356ae..1f248ba 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c
@@ -32,11 +32,18 @@
#include "s5p_mfc_opr.h"
#include "s5p_mfc_cmd.h"
#include "s5p_mfc_pm.h"
+#ifdef CONFIG_EXYNOS_IOMMU
+#include <asm/dma-iommu.h>
+#endif
#define S5P_MFC_NAME "s5p-mfc"
#define S5P_MFC_DEC_NAME "s5p-mfc-dec"
#define S5P_MFC_ENC_NAME "s5p-mfc-enc"
+#ifdef CONFIG_EXYNOS_IOMMU
+static struct dma_iommu_mapping *mapping;
+#endif
+
int debug;
module_param(debug, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug level - higher value produces more verbose
messages");
@@ -1013,6 +1020,23 @@ static void *mfc_get_drv_data(struct platform_device
*pdev);
static int s5p_mfc_alloc_memdevs(struct s5p_mfc_dev *dev)
{
+#ifdef CONFIG_EXYNOS_IOMMU
+ struct device *mdev = &dev->plat_dev->dev;
+
+ mapping = arm_iommu_create_mapping(&platform_bus_type, 0x20000000,
+ SZ_256M);
+ if (mapping == NULL) {
+ mfc_err("IOMMU mapping failed\n");
+ return -EFAULT;
+ }
+ mdev->dma_parms = devm_kzalloc(&dev->plat_dev->dev,
+ sizeof(*mdev->dma_parms), GFP_KERNEL);
+ dma_set_max_seg_size(mdev, 0xffffffffu);
+ arm_iommu_attach_device(mdev, mapping);
+
+ dev->mem_dev_l = dev->mem_dev_r = mdev;
+ return 0;
+#else
unsigned int mem_info[2] = { };
dev->mem_dev_l = devm_kzalloc(&dev->plat_dev->dev,
@@ -1049,6 +1073,7 @@ static int s5p_mfc_alloc_memdevs(struct s5p_mfc_dev *dev)
return -ENOMEM;
}
return 0;
+#endif
}
/* MFC probe function */
@@ -1228,6 +1253,10 @@ err_mem_init_ctx_1:
vb2_dma_contig_cleanup_ctx(dev->alloc_ctx[0]);
err_res:
s5p_mfc_final_pm(dev);
+#ifdef CONFIG_EXYNOS_IOMMU
+ if (mapping)
+ arm_iommu_release_mapping(mapping);
+#endif
pr_debug("%s-- with error\n", __func__);
return ret;
@@ -1256,6 +1285,10 @@ static int s5p_mfc_remove(struct platform_device *pdev)
put_device(dev->mem_dev_r);
}
+#ifdef CONFIG_EXYNOS_IOMMU
+ if (mapping)
+ arm_iommu_release_mapping(mapping);
+#endif
s5p_mfc_final_pm(dev);
return 0;
}
--
1.7.9.5
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