[PATCH v3 2/3] iommu/io-pgtable: Add helper functions for TLB ops
Robin Murphy
robin.murphy at arm.com
Tue Jan 26 09:13:14 PST 2016
Add some simple wrappers to avoid having the guts of the TLB operations
spilled all over the page table implementations, and to provide a point
to implement extra common functionality.
Acked-by: Will Deacon <will.deacon at arm.com>
Acked-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Signed-off-by: Robin Murphy <robin.murphy at arm.com>
---
drivers/iommu/io-pgtable-arm-v7s.c | 48 ++++++++++++++++----------------------
drivers/iommu/io-pgtable-arm.c | 21 +++++++----------
drivers/iommu/io-pgtable.c | 2 +-
drivers/iommu/io-pgtable.h | 16 +++++++++++++
4 files changed, 46 insertions(+), 41 deletions(-)
diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c
index efc7d1e..d39a021 100644
--- a/drivers/iommu/io-pgtable-arm-v7s.c
+++ b/drivers/iommu/io-pgtable-arm-v7s.c
@@ -417,9 +417,7 @@ static int arm_v7s_map(struct io_pgtable_ops *ops, unsigned long iova,
phys_addr_t paddr, size_t size, int prot)
{
struct arm_v7s_io_pgtable *data = io_pgtable_ops_to_data(ops);
- struct io_pgtable_cfg *cfg = &data->iop.cfg;
- const struct iommu_gather_ops *tlb = cfg->tlb;
- void *cookie = data->iop.cookie;
+ struct io_pgtable *iop = &data->iop;
int ret;
/* If no access, then nothing to do */
@@ -431,10 +429,10 @@ static int arm_v7s_map(struct io_pgtable_ops *ops, unsigned long iova,
* Synchronise all PTE updates for the new mapping before there's
* a chance for anything to kick off a table walk for the new iova.
*/
- if (cfg->quirks & IO_PGTABLE_QUIRK_TLBI_ON_MAP) {
- tlb->tlb_add_flush(iova, size, ARM_V7S_BLOCK_SIZE(2), false,
- cookie);
- tlb->tlb_sync(cookie);
+ if (iop->cfg.quirks & IO_PGTABLE_QUIRK_TLBI_ON_MAP) {
+ io_pgtable_tlb_add_flush(iop, iova, size,
+ ARM_V7S_BLOCK_SIZE(2), false);
+ io_pgtable_tlb_sync(iop);
} else {
wmb();
}
@@ -462,8 +460,7 @@ static void arm_v7s_split_cont(struct arm_v7s_io_pgtable *data,
unsigned long iova, int idx, int lvl,
arm_v7s_iopte *ptep)
{
- struct io_pgtable_cfg *cfg = &data->iop.cfg;
- void *cookie = data->iop.cookie;
+ struct io_pgtable *iop = &data->iop;
arm_v7s_iopte pte;
size_t size = ARM_V7S_BLOCK_SIZE(lvl);
int i;
@@ -475,11 +472,11 @@ static void arm_v7s_split_cont(struct arm_v7s_io_pgtable *data,
pte += size;
}
- __arm_v7s_pte_sync(ptep, ARM_V7S_CONT_PAGES, cfg);
+ __arm_v7s_pte_sync(ptep, ARM_V7S_CONT_PAGES, &iop->cfg);
size *= ARM_V7S_CONT_PAGES;
- cfg->tlb->tlb_add_flush(iova, size, size, true, cookie);
- cfg->tlb->tlb_sync(cookie);
+ io_pgtable_tlb_add_flush(iop, iova, size, size, true);
+ io_pgtable_tlb_sync(iop);
}
static int arm_v7s_split_blk_unmap(struct arm_v7s_io_pgtable *data,
@@ -489,7 +486,6 @@ static int arm_v7s_split_blk_unmap(struct arm_v7s_io_pgtable *data,
unsigned long blk_start, blk_end, blk_size;
phys_addr_t blk_paddr;
arm_v7s_iopte table = 0;
- struct io_pgtable_cfg *cfg = &data->iop.cfg;
int prot = arm_v7s_pte_to_prot(*ptep, 1);
blk_size = ARM_V7S_BLOCK_SIZE(1);
@@ -517,9 +513,9 @@ static int arm_v7s_split_blk_unmap(struct arm_v7s_io_pgtable *data,
}
}
- __arm_v7s_set_pte(ptep, table, 1, cfg);
+ __arm_v7s_set_pte(ptep, table, 1, &data->iop.cfg);
iova &= ~(blk_size - 1);
- cfg->tlb->tlb_add_flush(iova, blk_size, blk_size, true, data->iop.cookie);
+ io_pgtable_tlb_add_flush(&data->iop, iova, blk_size, blk_size, true);
return size;
}
@@ -528,9 +524,7 @@ static int __arm_v7s_unmap(struct arm_v7s_io_pgtable *data,
arm_v7s_iopte *ptep)
{
arm_v7s_iopte pte[ARM_V7S_CONT_PAGES];
- struct io_pgtable_cfg *cfg = &data->iop.cfg;
- const struct iommu_gather_ops *tlb = cfg->tlb;
- void *cookie = data->iop.cookie;
+ struct io_pgtable *iop = &data->iop;
int idx, i = 0, num_entries = size >> ARM_V7S_LVL_SHIFT(lvl);
/* Something went horribly wrong and we ran out of page table */
@@ -556,20 +550,19 @@ static int __arm_v7s_unmap(struct arm_v7s_io_pgtable *data,
if (num_entries) {
size_t blk_size = ARM_V7S_BLOCK_SIZE(lvl);
- __arm_v7s_set_pte(ptep, 0, num_entries, cfg);
+ __arm_v7s_set_pte(ptep, 0, num_entries, &iop->cfg);
for (i = 0; i < num_entries; i++) {
if (ARM_V7S_PTE_IS_TABLE(pte[i], lvl)) {
/* Also flush any partial walks */
- tlb->tlb_add_flush(iova, blk_size,
- ARM_V7S_BLOCK_SIZE(lvl + 1),
- false, cookie);
- tlb->tlb_sync(cookie);
+ io_pgtable_tlb_add_flush(iop, iova, blk_size,
+ ARM_V7S_BLOCK_SIZE(lvl + 1), false);
+ io_pgtable_tlb_sync(iop);
ptep = iopte_deref(pte[i], lvl);
__arm_v7s_free_table(ptep, lvl + 1, data);
} else {
- tlb->tlb_add_flush(iova, blk_size, blk_size,
- true, cookie);
+ io_pgtable_tlb_add_flush(iop, iova, blk_size,
+ blk_size, true);
}
iova += blk_size;
}
@@ -590,13 +583,12 @@ static int __arm_v7s_unmap(struct arm_v7s_io_pgtable *data,
static int arm_v7s_unmap(struct io_pgtable_ops *ops, unsigned long iova,
size_t size)
{
- size_t unmapped;
struct arm_v7s_io_pgtable *data = io_pgtable_ops_to_data(ops);
- struct io_pgtable *iop = &data->iop;
+ size_t unmapped;
unmapped = __arm_v7s_unmap(data, iova, size, 1, data->pgd);
if (unmapped)
- iop->cfg.tlb->tlb_sync(iop->cookie);
+ io_pgtable_tlb_sync(&data->iop);
return unmapped;
}
diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c
index 8bbcbfe..4095af2 100644
--- a/drivers/iommu/io-pgtable-arm.c
+++ b/drivers/iommu/io-pgtable-arm.c
@@ -445,7 +445,6 @@ static int arm_lpae_split_blk_unmap(struct arm_lpae_io_pgtable *data,
unsigned long blk_start, blk_end;
phys_addr_t blk_paddr;
arm_lpae_iopte table = 0;
- struct io_pgtable_cfg *cfg = &data->iop.cfg;
blk_start = iova & ~(blk_size - 1);
blk_end = blk_start + blk_size;
@@ -471,9 +470,9 @@ static int arm_lpae_split_blk_unmap(struct arm_lpae_io_pgtable *data,
}
}
- __arm_lpae_set_pte(ptep, table, cfg);
+ __arm_lpae_set_pte(ptep, table, &data->iop.cfg);
iova &= ~(blk_size - 1);
- cfg->tlb->tlb_add_flush(iova, blk_size, blk_size, true, data->iop.cookie);
+ io_pgtable_tlb_add_flush(&data->iop, iova, blk_size, blk_size, true);
return size;
}
@@ -482,8 +481,7 @@ static int __arm_lpae_unmap(struct arm_lpae_io_pgtable *data,
arm_lpae_iopte *ptep)
{
arm_lpae_iopte pte;
- const struct iommu_gather_ops *tlb = data->iop.cfg.tlb;
- void *cookie = data->iop.cookie;
+ struct io_pgtable *iop = &data->iop;
size_t blk_size = ARM_LPAE_BLOCK_SIZE(lvl, data);
/* Something went horribly wrong and we ran out of page table */
@@ -497,17 +495,17 @@ static int __arm_lpae_unmap(struct arm_lpae_io_pgtable *data,
/* If the size matches this level, we're in the right place */
if (size == blk_size) {
- __arm_lpae_set_pte(ptep, 0, &data->iop.cfg);
+ __arm_lpae_set_pte(ptep, 0, &iop->cfg);
if (!iopte_leaf(pte, lvl)) {
/* Also flush any partial walks */
- tlb->tlb_add_flush(iova, size, ARM_LPAE_GRANULE(data),
- false, cookie);
- tlb->tlb_sync(cookie);
+ io_pgtable_tlb_add_flush(iop, iova, size,
+ ARM_LPAE_GRANULE(data), false);
+ io_pgtable_tlb_sync(iop);
ptep = iopte_deref(pte, data);
__arm_lpae_free_pgtable(data, lvl + 1, ptep);
} else {
- tlb->tlb_add_flush(iova, size, size, true, cookie);
+ io_pgtable_tlb_add_flush(iop, iova, size, size, true);
}
return size;
@@ -531,13 +529,12 @@ static int arm_lpae_unmap(struct io_pgtable_ops *ops, unsigned long iova,
{
size_t unmapped;
struct arm_lpae_io_pgtable *data = io_pgtable_ops_to_data(ops);
- struct io_pgtable *iop = &data->iop;
arm_lpae_iopte *ptep = data->pgd;
int lvl = ARM_LPAE_START_LVL(data);
unmapped = __arm_lpae_unmap(data, iova, size, lvl, ptep);
if (unmapped)
- iop->cfg.tlb->tlb_sync(iop->cookie);
+ io_pgtable_tlb_sync(&data->iop);
return unmapped;
}
diff --git a/drivers/iommu/io-pgtable.c b/drivers/iommu/io-pgtable.c
index 8c615b7..876f6a7 100644
--- a/drivers/iommu/io-pgtable.c
+++ b/drivers/iommu/io-pgtable.c
@@ -75,6 +75,6 @@ void free_io_pgtable_ops(struct io_pgtable_ops *ops)
return;
iop = container_of(ops, struct io_pgtable, ops);
- iop->cfg.tlb->tlb_flush_all(iop->cookie);
+ io_pgtable_tlb_flush_all(iop);
io_pgtable_init_table[iop->fmt]->free(iop);
}
diff --git a/drivers/iommu/io-pgtable.h b/drivers/iommu/io-pgtable.h
index aa57073..95c5565 100644
--- a/drivers/iommu/io-pgtable.h
+++ b/drivers/iommu/io-pgtable.h
@@ -144,6 +144,22 @@ struct io_pgtable {
#define io_pgtable_ops_to_pgtable(x) container_of((x), struct io_pgtable, ops)
+static inline void io_pgtable_tlb_flush_all(struct io_pgtable *iop)
+{
+ iop->cfg.tlb->tlb_flush_all(iop->cookie);
+}
+
+static inline void io_pgtable_tlb_add_flush(struct io_pgtable *iop,
+ unsigned long iova, size_t size, size_t granule, bool leaf)
+{
+ iop->cfg.tlb->tlb_add_flush(iova, size, granule, leaf, iop->cookie);
+}
+
+static inline void io_pgtable_tlb_sync(struct io_pgtable *iop)
+{
+ iop->cfg.tlb->tlb_sync(iop->cookie);
+}
+
/**
* struct io_pgtable_init_fns - Alloc/free a set of page tables for a
* particular format.
--
2.7.0.25.gfc10eb5
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