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iommu/dma: Unexport IOVA cookie management 

IOVA cookies are now got and put by core code, so we no longer need to
export these to modular drivers. The export for getting MSI cookies
stays, since VFIO can still be a module, but it was already relying on
someone else putting them, so that aspect is unaffected.

Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/ef89db54a27df7d8bc0af094c7d7b204fd61774c.1631531973.git.robin.murphy@arm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Robin Murphy 2021-09-13 13:40:06 +01:00 committed by Joerg Roedel
parent b2b2781a97
commit 3d31d4e7a3
2 changed files with 1 additions and 9 deletions
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7
drivers/iommu/dma-iommu.c
View File

@ -98,9 +98,6 @@ static struct iommu_dma_cookie *cookie_alloc(enum iommu_dma_cookie_type type)
/**
* iommu_get_dma_cookie - Acquire DMA-API resources for a domain
* @domain: IOMMU domain to prepare for DMA-API usage
*
* IOMMU drivers should normally call this from their domain_alloc
* callback when domain->type == IOMMU_DOMAIN_DMA.
*/
int iommu_get_dma_cookie(struct iommu_domain *domain)
{
@ -113,7 +110,6 @@ int iommu_get_dma_cookie(struct iommu_domain *domain)
return 0;
}
EXPORT_SYMBOL(iommu_get_dma_cookie);
/**
* iommu_get_msi_cookie - Acquire just MSI remapping resources
@ -151,8 +147,6 @@ EXPORT_SYMBOL(iommu_get_msi_cookie);
* iommu_put_dma_cookie - Release a domain's DMA mapping resources
* @domain: IOMMU domain previously prepared by iommu_get_dma_cookie() or
* iommu_get_msi_cookie()
*
* IOMMU drivers should normally call this from their domain_free callback.
*/
void iommu_put_dma_cookie(struct iommu_domain *domain)
{
@ -172,7 +166,6 @@ void iommu_put_dma_cookie(struct iommu_domain *domain)
kfree(cookie);
domain->iova_cookie = NULL;
}
EXPORT_SYMBOL(iommu_put_dma_cookie);
/**
* iommu_dma_get_resv_regions - Reserved region driver helper

3
drivers/iommu/iommu.c
View File

@ -1953,8 +1953,7 @@ static struct iommu_domain *__iommu_domain_alloc(struct bus_type *bus,
/* Assume all sizes by default; the driver may override this later */
domain->pgsize_bitmap = bus->iommu_ops->pgsize_bitmap;
/* Temporarily avoid -EEXIST while drivers still get their own cookies */
if (iommu_is_dma_domain(domain) && !domain->iova_cookie && iommu_get_dma_cookie(domain)) {
if (iommu_is_dma_domain(domain) && iommu_get_dma_cookie(domain)) {
iommu_domain_free(domain);
domain = NULL;
}