shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-11 13:27:06 +09:00
Code Issues Packages Projects Releases Wiki Activity

Move code for DMA memory configuration with IOMMU into separate function to make it easier to compare what is being done in each case.

Browse Source 
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Reviewed-by: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx>
Tested-by: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx>
Signed-off-by: memeka <mihailescu2m@gmail.com>
This commit is contained in:
Marek Szyprowski
2017-02-03 15:05:18 +01:00
committed by Mauro (mdrjr) Ribeiro
parent 3b9a20dc3c
commit 5bd6e8b795
1 changed files with 62 additions and 42 deletions
Download Patch File Download Diff File Expand all files Collapse all files

104
drivers/media/platform/s5p-mfc/s5p_mfc.c
View File

@@ -1107,43 +1107,14 @@ static struct device *s5p_mfc_alloc_memdev(struct device *dev,
return NULL;
}
static int s5p_mfc_configure_dma_memory(struct s5p_mfc_dev *mfc_dev)
static int s5p_mfc_configure_2port_memory(struct s5p_mfc_dev *mfc_dev)
{
struct device *dev = &mfc_dev->plat_dev->dev;
void *bank2_virt;
dma_addr_t bank2_dma_addr;
unsigned long align_size = 1 << MFC_BASE_ALIGN_ORDER;
struct s5p_mfc_priv_buf *fw_buf = &mfc_dev->fw_buf;
int ret;
/*
* When IOMMU is available, we cannot use the default configuration,
* because of MFC firmware requirements: address space limited to
* 256M and non-zero default start address.
* This is still simplified, not optimal configuration, but for now
* IOMMU core doesn't allow to configure device's IOMMUs channel
* separately.
*/
if (exynos_is_iommu_available(dev)) {
int ret = exynos_configure_iommu(dev, S5P_MFC_IOMMU_DMA_BASE,
S5P_MFC_IOMMU_DMA_SIZE);
if (ret)
return ret;
mfc_dev->mem_dev[BANK1_CTX] = mfc_dev->mem_dev[BANK2_CTX] = dev;
ret = s5p_mfc_alloc_firmware(mfc_dev);
if (ret) {
exynos_unconfigure_iommu(dev);
return ret;
}
mfc_dev->dma_base[BANK1_CTX] = fw_buf->dma;
mfc_dev->dma_base[BANK2_CTX] = fw_buf->dma;
vb2_dma_contig_set_max_seg_size(dev, DMA_BIT_MASK(32));
return 0;
}
/*
* Create and initialize virtual devices for accessing
* reserved memory regions.
@@ -1167,7 +1138,7 @@ static int s5p_mfc_configure_dma_memory(struct s5p_mfc_dev *mfc_dev)
return ret;
}
mfc_dev->dma_base[BANK1_CTX] = fw_buf->dma;
mfc_dev->dma_base[BANK1_CTX] = mfc_dev->fw_buf.dma;
bank2_virt = dma_alloc_coherent(mfc_dev->mem_dev[BANK2_CTX], align_size,
&bank2_dma_addr, GFP_KERNEL);
@@ -1196,22 +1167,71 @@ static int s5p_mfc_configure_dma_memory(struct s5p_mfc_dev *mfc_dev)
return 0;
}
static void s5p_mfc_unconfigure_2port_memory(struct s5p_mfc_dev *mfc_dev)
{
device_unregister(mfc_dev->mem_dev[BANK1_CTX]);
device_unregister(mfc_dev->mem_dev[BANK2_CTX]);
vb2_dma_contig_clear_max_seg_size(mfc_dev->mem_dev[BANK1_CTX]);
vb2_dma_contig_clear_max_seg_size(mfc_dev->mem_dev[BANK2_CTX]);
}
static int s5p_mfc_configure_common_memory(struct s5p_mfc_dev *mfc_dev)
{
struct device *dev = &mfc_dev->plat_dev->dev;
/*
* When IOMMU is available, we cannot use the default configuration,
* because of MFC firmware requirements: address space limited to
* 256M and non-zero default start address.
* This is still simplified, not optimal configuration, but for now
* IOMMU core doesn't allow to configure device's IOMMUs channel
* separately.
*/
int ret = exynos_configure_iommu(dev, S5P_MFC_IOMMU_DMA_BASE,
S5P_MFC_IOMMU_DMA_SIZE);
if (ret)
return ret;
mfc_dev->mem_dev[BANK1_CTX] = mfc_dev->mem_dev[BANK2_CTX] = dev;
ret = s5p_mfc_alloc_firmware(mfc_dev);
if (ret) {
exynos_unconfigure_iommu(dev);
return ret;
}
mfc_dev->dma_base[BANK1_CTX] = mfc_dev->fw_buf.dma;
mfc_dev->dma_base[BANK2_CTX] = mfc_dev->fw_buf.dma;
vb2_dma_contig_set_max_seg_size(dev, DMA_BIT_MASK(32));
return 0;
}
static void s5p_mfc_unconfigure_common_memory(struct s5p_mfc_dev *mfc_dev)
{
struct device *dev = &mfc_dev->plat_dev->dev;
exynos_unconfigure_iommu(dev);
vb2_dma_contig_clear_max_seg_size(dev);
}
static int s5p_mfc_configure_dma_memory(struct s5p_mfc_dev *mfc_dev)
{
struct device *dev = &mfc_dev->plat_dev->dev;
if (exynos_is_iommu_available(dev))
return s5p_mfc_configure_common_memory(mfc_dev);
else
return s5p_mfc_configure_2port_memory(mfc_dev);
}
static void s5p_mfc_unconfigure_dma_memory(struct s5p_mfc_dev *mfc_dev)
{
struct device *dev = &mfc_dev->plat_dev->dev;
s5p_mfc_release_firmware(mfc_dev);
if (exynos_is_iommu_available(dev)) {
exynos_unconfigure_iommu(dev);
vb2_dma_contig_clear_max_seg_size(dev);
return;
}
device_unregister(mfc_dev->mem_dev[BANK1_CTX]);
device_unregister(mfc_dev->mem_dev[BANK2_CTX]);
vb2_dma_contig_clear_max_seg_size(mfc_dev->mem_dev[BANK1_CTX]);
vb2_dma_contig_clear_max_seg_size(mfc_dev->mem_dev[BANK2_CTX]);
if (exynos_is_iommu_available(dev))
s5p_mfc_unconfigure_common_memory(mfc_dev);
else
s5p_mfc_unconfigure_2port_memory(mfc_dev);
}
/* MFC probe function */