[PATCH v3 01/10] iommu: Add a gfp parameter to iommu_map()

Jason Gunthorpe
2023-01-23T20:37:04Z

The internal mechanisms support this, but instead of exposting the gfp to
the caller it wrappers it into iommu_map() and iommu_map_atomic()

Fix this instead of adding more variants for GFP_KERNEL_ACCOUNT.

Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
arch/arm/mm/dma-mapping.c | 11 ++++++----
.../drm/nouveau/nvkm/subdev/instmem/gk20a.c | 3 ++-
drivers/gpu/drm/tegra/drm.c | 2 +-
drivers/gpu/host1x/cdma.c | 2 +-
drivers/infiniband/hw/usnic/usnic_uiom.c | 4 ++--
drivers/iommu/dma-iommu.c | 2 +-
drivers/iommu/iommu.c | 22 +++++++++----------
drivers/iommu/iommufd/pages.c | 6 +++--
drivers/media/platform/qcom/venus/firmware.c | 2 +-
drivers/net/ipa/ipa_mem.c | 6 +++--
drivers/net/wireless/ath/ath10k/snoc.c | 2 +-
drivers/net/wireless/ath/ath11k/ahb.c | 4 ++--
drivers/remoteproc/remoteproc_core.c | 5 +++--
drivers/vfio/vfio_iommu_type1.c | 9 ++++----
drivers/vhost/vdpa.c | 2 +-
include/linux/iommu.h | 4 ++--
16 files changed, 48 insertions(+), 38 deletions(-)

diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index c135f6e37a00ca..8bc01071474ab7 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -984,7 +984,8 @@ __iommu_create_mapping(struct device *dev, struct page **pages, size_t size,

len = (j - i) << PAGE_SHIFT;
ret = iommu_map(mapping->domain, iova, phys, len,
- __dma_info_to_prot(DMA_BIDIRECTIONAL, attrs));
+ __dma_info_to_prot(DMA_BIDIRECTIONAL, attrs),
+ GFP_KERNEL);
if (ret < 0)
goto fail;
iova += len;
@@ -1207,7 +1208,8 @@ static int __map_sg_chunk(struct device *dev, struct scatterlist *sg,

prot = __dma_info_to_prot(dir, attrs);

- ret = iommu_map(mapping->domain, iova, phys, len, prot);
+ ret = iommu_map(mapping->domain, iova, phys, len, prot,
+ GFP_KERNEL);
if (ret < 0)
goto fail;
count += len >> PAGE_SHIFT;
@@ -1379,7 +1381,8 @@ static dma_addr_t arm_iommu_map_page(struct device *dev, struct page *page,

prot = __dma_info_to_prot(dir, attrs);

- ret = iommu_map(mapping->domain, dma_addr, page_to_phys(page), len, prot);
+ ret = iommu_map(mapping->domain, dma_addr, page_to_phys(page), len,
+ prot, GFP_KERNEL);
if (ret < 0)
goto fail;

@@ -1443,7 +1446,7 @@ static dma_addr_t arm_iommu_map_resource(struct device *dev,

prot = __dma_info_to_prot(dir, attrs) | IOMMU_MMIO;

- ret = iommu_map(mapping->domain, dma_addr, addr, len, prot);
+ ret = iommu_map(mapping->domain, dma_addr, addr, len, prot, GFP_KERNEL);
if (ret < 0)
goto fail;

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/gk20a.c b/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/gk20a.c
index 648ecf5a8fbc2a..a4ac94a2ab57fc 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/gk20a.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/gk20a.c
@@ -475,7 +475,8 @@ gk20a_instobj_ctor_iommu(struct gk20a_instmem *imem, u32 npages, u32 align,
u32 offset = (r->offset + i) << imem->iommu_pgshift;

ret = iommu_map(imem->domain, offset, node->dma_addrs[i],
- PAGE_SIZE, IOMMU_READ | IOMMU_WRITE);
+ PAGE_SIZE, IOMMU_READ | IOMMU_WRITE,
+ GFP_KERNEL);
if (ret < 0) {
nvkm_error(subdev, "IOMMU mapping failure: %d\n", ret);

diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index 7bd2e65c2a16c5..6ca9f396e55be4 100644
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -1057,7 +1057,7 @@ void *tegra_drm_alloc(struct tegra_drm *tegra, size_t size, dma_addr_t *dma)

*dma = iova_dma_addr(&tegra->carveout.domain, alloc);
err = iommu_map(tegra->domain, *dma, virt_to_phys(virt),
- size, IOMMU_READ | IOMMU_WRITE);
+ size, IOMMU_READ | IOMMU_WRITE, GFP_KERNEL);
if (err < 0)
goto free_iova;

diff --git a/drivers/gpu/host1x/cdma.c b/drivers/gpu/host1x/cdma.c
index 103fda055394ab..4ddfcd2138c95b 100644
--- a/drivers/gpu/host1x/cdma.c
+++ b/drivers/gpu/host1x/cdma.c
@@ -105,7 +105,7 @@ static int host1x_pushbuffer_init(struct push_buffer *pb)

pb->dma = iova_dma_addr(&host1x->iova, alloc);
err = iommu_map(host1x->domain, pb->dma, pb->phys, size,
- IOMMU_READ);
+ IOMMU_READ, GFP_KERNEL);
if (err)
goto iommu_free_iova;
} else {
diff --git a/drivers/infiniband/hw/usnic/usnic_uiom.c b/drivers/infiniband/hw/usnic/usnic_uiom.c
index c301b3be9f303d..aeeaca65ace96a 100644
--- a/drivers/infiniband/hw/usnic/usnic_uiom.c
+++ b/drivers/infiniband/hw/usnic/usnic_uiom.c
@@ -277,7 +277,7 @@ static int usnic_uiom_map_sorted_intervals(struct list_head *intervals,
usnic_dbg("va 0x%lx pa %pa size 0x%zx flags 0x%x",
va_start, &pa_start, size, flags);
err = iommu_map(pd->domain, va_start, pa_start,
- size, flags);
+ size, flags, GFP_KERNEL);
if (err) {
usnic_err("Failed to map va 0x%lx pa %pa size 0x%zx with err %d\n",
va_start, &pa_start, size, err);
@@ -294,7 +294,7 @@ static int usnic_uiom_map_sorted_intervals(struct list_head *intervals,
usnic_dbg("va 0x%lx pa %pa size 0x%zx flags 0x%x\n",
va_start, &pa_start, size, flags);
err = iommu_map(pd->domain, va_start, pa_start,
- size, flags);
+ size, flags, GFP_KERNEL);
if (err) {
usnic_err("Failed to map va 0x%lx pa %pa size 0x%zx with err %d\n",
va_start, &pa_start, size, err);
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index f798c44e090337..8bdb65e7686ff9 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -1615,7 +1615,7 @@ static struct iommu_dma_msi_page *iommu_dma_get_msi_page(struct device *dev,
if (!iova)
goto out_free_page;

- if (iommu_map(domain, iova, msi_addr, size, prot))
+ if (iommu_map(domain, iova, msi_addr, size, prot, GFP_KERNEL))
goto out_free_iova;

INIT_LIST_HEAD(&msi_page->list);
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 5f6a85aea501ec..7dac062b58f039 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -930,7 +930,7 @@ static int iommu_create_device_direct_mappings(struct iommu_group *group,
if (map_size) {
ret = iommu_map(domain, addr - map_size,
addr - map_size, map_size,
- entry->prot);
+ entry->prot, GFP_KERNEL);
if (ret)
goto out;
map_size = 0;
@@ -2360,31 +2360,31 @@ static int __iommu_map(struct iommu_domain *domain, unsigned long iova,
return ret;
}

-static int _iommu_map(struct iommu_domain *domain, unsigned long iova,
- phys_addr_t paddr, size_t size, int prot, gfp_t gfp)
+int iommu_map(struct iommu_domain *domain, unsigned long iova,
+ phys_addr_t paddr, size_t size, int prot, gfp_t gfp)
{
const struct iommu_domain_ops *ops = domain->ops;
int ret;

+ might_sleep_if(gfpflags_allow_blocking(gfp));
+
+ /* Discourage passing strange GFP flags */
+ if (WARN_ON_ONCE(gfp & (__GFP_COMP | __GFP_DMA | __GFP_DMA32 |
+ __GFP_HIGHMEM)))
+ return -EINVAL;
+
ret = __iommu_map(domain, iova, paddr, size, prot, gfp);
if (ret == 0 && ops->iotlb_sync_map)
ops->iotlb_sync_map(domain, iova, size);

return ret;
}
-
-int iommu_map(struct iommu_domain *domain, unsigned long iova,
- phys_addr_t paddr, size_t size, int prot)
-{
- might_sleep();
- return _iommu_map(domain, iova, paddr, size, prot, GFP_KERNEL);
-}
EXPORT_SYMBOL_GPL(iommu_map);

int iommu_map_atomic(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, size_t size, int prot)
{
- return _iommu_map(domain, iova, paddr, size, prot, GFP_ATOMIC);
+ return iommu_map(domain, iova, paddr, size, prot, GFP_ATOMIC);
}
EXPORT_SYMBOL_GPL(iommu_map_atomic);

diff --git a/drivers/iommu/iommufd/pages.c b/drivers/iommu/iommufd/pages.c
index 1e1d3509efae5e..22cc3bb0c6c55a 100644
--- a/drivers/iommu/iommufd/pages.c
+++ b/drivers/iommu/iommufd/pages.c
@@ -456,7 +456,8 @@ static int batch_iommu_map_small(struct iommu_domain *domain,
size % PAGE_SIZE);

while (size) {
- rc = iommu_map(domain, iova, paddr, PAGE_SIZE, prot);
+ rc = iommu_map(domain, iova, paddr, PAGE_SIZE, prot,
+ GFP_KERNEL);
if (rc)
goto err_unmap;
iova += PAGE_SIZE;
@@ -500,7 +501,8 @@ static int batch_to_domain(struct pfn_batch *batch, struct iommu_domain *domain,
else
rc = iommu_map(domain, iova,
PFN_PHYS(batch->pfns[cur]) + page_offset,
- next_iova - iova, area->iommu_prot);
+ next_iova - iova, area->iommu_prot,
+ GFP_KERNEL);
if (rc)
goto err_unmap;
iova = next_iova;
diff --git a/drivers/media/platform/qcom/venus/firmware.c b/drivers/media/platform/qcom/venus/firmware.c
index 142d4c74017c04..07d4dceb5e72c7 100644
--- a/drivers/media/platform/qcom/venus/firmware.c
+++ b/drivers/media/platform/qcom/venus/firmware.c
@@ -158,7 +158,7 @@ static int venus_boot_no_tz(struct venus_core *core, phys_addr_t mem_phys,
core->fw.mapped_mem_size = mem_size;

ret = iommu_map(iommu, VENUS_FW_START_ADDR, mem_phys, mem_size,
- IOMMU_READ | IOMMU_WRITE | IOMMU_PRIV);
+ IOMMU_READ | IOMMU_WRITE | IOMMU_PRIV, GFP_KERNEL);
if (ret) {
dev_err(dev, "could not map video firmware region\n");
return ret;
diff --git a/drivers/net/ipa/ipa_mem.c b/drivers/net/ipa/ipa_mem.c
index 9ec5af323f731d..991a7d39f06661 100644
--- a/drivers/net/ipa/ipa_mem.c
+++ b/drivers/net/ipa/ipa_mem.c
@@ -466,7 +466,8 @@ static int ipa_imem_init(struct ipa *ipa, unsigned long addr, size_t size)
size = PAGE_ALIGN(size + addr - phys);
iova = phys; /* We just want a direct mapping */

- ret = iommu_map(domain, iova, phys, size, IOMMU_READ | IOMMU_WRITE);
+ ret = iommu_map(domain, iova, phys, size, IOMMU_READ | IOMMU_WRITE,
+ GFP_KERNEL);
if (ret)
return ret;

@@ -574,7 +575,8 @@ static int ipa_smem_init(struct ipa *ipa, u32 item, size_t size)
size = PAGE_ALIGN(size + addr - phys);
iova = phys; /* We just want a direct mapping */

- ret = iommu_map(domain, iova, phys, size, IOMMU_READ | IOMMU_WRITE);
+ ret = iommu_map(domain, iova, phys, size, IOMMU_READ | IOMMU_WRITE,
+ GFP_KERNEL);
if (ret)
return ret;

diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c
index cfcb759a87deac..9a82f0336d9537 100644
--- a/drivers/net/wireless/ath/ath10k/snoc.c
+++ b/drivers/net/wireless/ath/ath10k/snoc.c
@@ -1639,7 +1639,7 @@ static int ath10k_fw_init(struct ath10k *ar)

ret = iommu_map(iommu_dom, ar_snoc->fw.fw_start_addr,
ar->msa.paddr, ar->msa.mem_size,
- IOMMU_READ | IOMMU_WRITE);
+ IOMMU_READ | IOMMU_WRITE, GFP_KERNEL);
if (ret) {
ath10k_err(ar, "failed to map firmware region: %d\n", ret);
goto err_iommu_detach;
diff --git a/drivers/net/wireless/ath/ath11k/ahb.c b/drivers/net/wireless/ath/ath11k/ahb.c
index d34a4d6325b2b4..df8fdc7067f99c 100644
--- a/drivers/net/wireless/ath/ath11k/ahb.c
+++ b/drivers/net/wireless/ath/ath11k/ahb.c
@@ -1021,7 +1021,7 @@ static int ath11k_ahb_fw_resources_init(struct ath11k_base *ab)

ret = iommu_map(iommu_dom, ab_ahb->fw.msa_paddr,
ab_ahb->fw.msa_paddr, ab_ahb->fw.msa_size,
- IOMMU_READ | IOMMU_WRITE);
+ IOMMU_READ | IOMMU_WRITE, GFP_KERNEL);
if (ret) {
ath11k_err(ab, "failed to map firmware region: %d\n", ret);
goto err_iommu_detach;
@@ -1029,7 +1029,7 @@ static int ath11k_ahb_fw_resources_init(struct ath11k_base *ab)

ret = iommu_map(iommu_dom, ab_ahb->fw.ce_paddr,
ab_ahb->fw.ce_paddr, ab_ahb->fw.ce_size,
- IOMMU_READ | IOMMU_WRITE);
+ IOMMU_READ | IOMMU_WRITE, GFP_KERNEL);
if (ret) {
ath11k_err(ab, "failed to map firmware CE region: %d\n", ret);
goto err_iommu_unmap;
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 1cd4815a6dd197..80072b6b628358 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -643,7 +643,8 @@ static int rproc_handle_devmem(struct rproc *rproc, void *ptr,
if (!mapping)
return -ENOMEM;

- ret = iommu_map(rproc->domain, rsc->da, rsc->pa, rsc->len, rsc->flags);
+ ret = iommu_map(rproc->domain, rsc->da, rsc->pa, rsc->len, rsc->flags,
+ GFP_KERNEL);
if (ret) {
dev_err(dev, "failed to map devmem: %d\n", ret);
goto out;
@@ -737,7 +738,7 @@ static int rproc_alloc_carveout(struct rproc *rproc,
}

ret = iommu_map(rproc->domain, mem->da, dma, mem->len,
- mem->flags);
+ mem->flags, GFP_KERNEL);
if (ret) {
dev_err(dev, "iommu_map failed: %d\n", ret);
goto free_mapping;
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 23c24fe98c00d4..e14f86a8ef5258 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -1480,7 +1480,8 @@ static int vfio_iommu_map(struct vfio_iommu *iommu, dma_addr_t iova,

list_for_each_entry(d, &iommu->domain_list, next) {
ret = iommu_map(d->domain, iova, (phys_addr_t)pfn << PAGE_SHIFT,
- npage << PAGE_SHIFT, prot | IOMMU_CACHE);
+ npage << PAGE_SHIFT, prot | IOMMU_CACHE,
+ GFP_KERNEL);
if (ret)
goto unwind;

@@ -1777,8 +1778,8 @@ static int vfio_iommu_replay(struct vfio_iommu *iommu,
size = npage << PAGE_SHIFT;
}

- ret = iommu_map(domain->domain, iova, phys,
- size, dma->prot | IOMMU_CACHE);
+ ret = iommu_map(domain->domain, iova, phys, size,
+ dma->prot | IOMMU_CACHE, GFP_KERNEL);
if (ret) {
if (!dma->iommu_mapped) {
vfio_unpin_pages_remote(dma, iova,
@@ -1866,7 +1867,7 @@ static void vfio_test_domain_fgsp(struct vfio_domain *domain)
return;

ret = iommu_map(domain->domain, 0, page_to_phys(pages), PAGE_SIZE * 2,
- IOMMU_READ | IOMMU_WRITE | IOMMU_CACHE);
+ IOMMU_READ | IOMMU_WRITE | IOMMU_CACHE, GFP_KERNEL);
if (!ret) {
size_t unmapped = iommu_unmap(domain->domain, 0, PAGE_SIZE);

diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index ec32f785dfdec1..fd1536de5b1df0 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -792,7 +792,7 @@ static int vhost_vdpa_map(struct vhost_vdpa *v, struct vhost_iotlb *iotlb,
r = ops->set_map(vdpa, asid, iotlb);
} else {
r = iommu_map(v->domain, iova, pa, size,
- perm_to_iommu_flags(perm));
+ perm_to_iommu_flags(perm), GFP_KERNEL);
}
if (r) {
vhost_iotlb_del_range(iotlb, iova, iova + size - 1);
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 46e1347bfa2286..d2020994f292db 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -467,7 +467,7 @@ extern int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev);
extern struct iommu_domain *iommu_get_dma_domain(struct device *dev);
extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
- phys_addr_t paddr, size_t size, int prot);
+ phys_addr_t paddr, size_t size, int prot, gfp_t gfp);
extern int iommu_map_atomic(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, size_t size, int prot);
extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
@@ -773,7 +773,7 @@ static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev)
}

static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
- phys_addr_t paddr, size_t size, int prot)
+ phys_addr_t paddr, size_t size, int prot, gfp_t gfp)
{
return -ENODEV;
}
--
2.39.0