static void g2d_fini_cmdlist(struct g2d_data *g2d)
{
struct device *dev = g2d->dev;
exynos_drm_iommu_unmap(dev, g2d->cmdlist_pool_map);
kfree(g2d->cmdlist_node);
dma_free_coherent(dev, G2D_CMDLIST_POOL_SIZE, g2d->cmdlist_pool_virt,
g2d->cmdlist_pool);
}
static int g2d_init_cmdlist(struct g2d_data *g2d,
struct exynos_drm_private *drm_priv)
{
struct device *dev = g2d->dev;
struct g2d_cmdlist_node *node = g2d->cmdlist_node;
int nr;
int ret;
g2d->cmdlist_pool_virt = dma_alloc_coherent(dev, G2D_CMDLIST_POOL_SIZE,
&g2d->cmdlist_pool, GFP_KERNEL);
if (!g2d->cmdlist_pool_virt) {
dev_err(dev, "failed to allocate dma memory\n");
return -ENOMEM;
}
/*
* Allocate device address space for command list pool and then map all
* pages contained in sg list to iommu table. Command list pool also is
* accessed by dma through device address with using iommu.
*/
g2d->cmdlist_pool_map = exynos_drm_iommu_map(drm_priv->vmm,
g2d->cmdlist_pool,
G2D_CMDLIST_POOL_SIZE);
if (!g2d->cmdlist_pool_map) {
dev_err(dev, "failed map to iommu\n");
ret = -EFAULT;
goto err;
}
node = kcalloc(G2D_CMDLIST_NUM, G2D_CMDLIST_NUM * sizeof(*node),
GFP_KERNEL);
if (!node) {
dev_err(dev, "failed to allocate memory\n");
ret = -ENOMEM;
goto err_iommu_unmap;
}
for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) {
node[nr].cmdlist =
g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE;
node[nr].dma_addr =
g2d->cmdlist_pool_map + nr * G2D_CMDLIST_SIZE;
list_add_tail(&node[nr].list, &g2d->free_cmdlist);
}
return 0;
err_iommu_unmap:
exynos_drm_iommu_unmap(drm_priv->vmm, g2d->cmdlist_pool_map);
err:
dma_free_coherent(dev, G2D_CMDLIST_POOL_SIZE, g2d->cmdlist_pool_virt,
g2d->cmdlist_pool);
return ret;
}
static void g2d_fini_cmdlist(struct g2d_data *g2d)
{
struct exynos_drm_private *drm_priv;
struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
drm_priv = subdrv->drm_dev->dev_private;
if (drm_priv->vmm)
exynos_drm_iommu_unmap(drm_priv->vmm, g2d->cmdlist_pool_map);
kfree(g2d->cmdlist_node);
dma_free_coherent(g2d->dev, G2D_CMDLIST_POOL_SIZE,
g2d->cmdlist_pool_virt,
g2d->cmdlist_pool);
}
