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iommu/iova: Squash entry_dtor abstraction
All flush queues are driven by iommu-dma now, so there is no need to abstract entry_dtor or its data any more. Squash the now-canonical implementation directly into the IOVA code to get it out of the way. Reviewed-by: John Garry <john.garry@huawei.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Link: https://lore.kernel.org/r/2260f8de00ab5e0f9d2a1cf8978e6ae7cd4f182c.1639753638.git.robin.murphy@arm.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Robin Murphy
Joerg Roedel
parent
d7061627d7
commit
d5c383f2c9
3 changed files with 20 additions and 51 deletions
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@ -64,18 +64,6 @@ static int __init iommu_dma_forcedac_setup(char *str)
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}
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early_param("iommu.forcedac", iommu_dma_forcedac_setup);
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static void iommu_dma_entry_dtor(unsigned long data)
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{
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struct page *freelist = (struct page *)data;
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while (freelist) {
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unsigned long p = (unsigned long)page_address(freelist);
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freelist = freelist->freelist;
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free_page(p);
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}
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}
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static inline size_t cookie_msi_granule(struct iommu_dma_cookie *cookie)
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{
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if (cookie->type == IOMMU_DMA_IOVA_COOKIE)
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@ -324,8 +312,7 @@ int iommu_dma_init_fq(struct iommu_domain *domain)
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if (cookie->fq_domain)
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return 0;
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ret = init_iova_flush_queue(&cookie->iovad, iommu_dma_flush_iotlb_all,
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iommu_dma_entry_dtor);
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ret = init_iova_flush_queue(&cookie->iovad, iommu_dma_flush_iotlb_all);
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if (ret) {
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pr_warn("iova flush queue initialization failed\n");
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return ret;
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@ -471,7 +458,7 @@ static void iommu_dma_free_iova(struct iommu_dma_cookie *cookie,
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else if (gather && gather->queued)
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queue_iova(iovad, iova_pfn(iovad, iova),
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size >> iova_shift(iovad),
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(unsigned long)gather->freelist);
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gather->freelist);
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else
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free_iova_fast(iovad, iova_pfn(iovad, iova),
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size >> iova_shift(iovad));
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@ -91,11 +91,9 @@ static void free_iova_flush_queue(struct iova_domain *iovad)
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iovad->fq = NULL;
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iovad->flush_cb = NULL;
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iovad->entry_dtor = NULL;
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}
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int init_iova_flush_queue(struct iova_domain *iovad,
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iova_flush_cb flush_cb, iova_entry_dtor entry_dtor)
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int init_iova_flush_queue(struct iova_domain *iovad, iova_flush_cb flush_cb)
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{
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struct iova_fq __percpu *queue;
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int cpu;
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@ -108,7 +106,6 @@ int init_iova_flush_queue(struct iova_domain *iovad,
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return -ENOMEM;
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iovad->flush_cb = flush_cb;
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iovad->entry_dtor = entry_dtor;
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for_each_possible_cpu(cpu) {
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struct iova_fq *fq;
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@ -547,6 +544,16 @@ free_iova_fast(struct iova_domain *iovad, unsigned long pfn, unsigned long size)
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}
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EXPORT_SYMBOL_GPL(free_iova_fast);
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static void fq_entry_dtor(struct page *freelist)
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{
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while (freelist) {
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unsigned long p = (unsigned long)page_address(freelist);
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freelist = freelist->freelist;
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free_page(p);
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}
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}
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#define fq_ring_for_each(i, fq) \
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for ((i) = (fq)->head; (i) != (fq)->tail; (i) = ((i) + 1) % IOVA_FQ_SIZE)
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@ -579,9 +586,7 @@ static void fq_ring_free(struct iova_domain *iovad, struct iova_fq *fq)
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if (fq->entries[idx].counter >= counter)
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break;
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if (iovad->entry_dtor)
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iovad->entry_dtor(fq->entries[idx].data);
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fq_entry_dtor(fq->entries[idx].freelist);
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free_iova_fast(iovad,
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fq->entries[idx].iova_pfn,
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fq->entries[idx].pages);
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@ -606,15 +611,12 @@ static void fq_destroy_all_entries(struct iova_domain *iovad)
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* bother to free iovas, just call the entry_dtor on all remaining
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* entries.
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*/
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if (!iovad->entry_dtor)
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return;
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for_each_possible_cpu(cpu) {
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struct iova_fq *fq = per_cpu_ptr(iovad->fq, cpu);
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int idx;
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fq_ring_for_each(idx, fq)
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iovad->entry_dtor(fq->entries[idx].data);
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fq_entry_dtor(fq->entries[idx].freelist);
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}
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}
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@ -639,7 +641,7 @@ static void fq_flush_timeout(struct timer_list *t)
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void queue_iova(struct iova_domain *iovad,
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unsigned long pfn, unsigned long pages,
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unsigned long data)
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struct page *freelist)
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{
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struct iova_fq *fq;
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unsigned long flags;
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@ -673,7 +675,7 @@ void queue_iova(struct iova_domain *iovad,
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fq->entries[idx].iova_pfn = pfn;
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fq->entries[idx].pages = pages;
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fq->entries[idx].data = data;
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fq->entries[idx].freelist = freelist;
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fq->entries[idx].counter = atomic64_read(&iovad->fq_flush_start_cnt);
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spin_unlock_irqrestore(&fq->lock, flags);
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@ -40,9 +40,6 @@ struct iova_domain;
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/* Call-Back from IOVA code into IOMMU drivers */
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typedef void (* iova_flush_cb)(struct iova_domain *domain);
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/* Destructor for per-entry data */
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typedef void (* iova_entry_dtor)(unsigned long data);
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/* Number of entries per Flush Queue */
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#define IOVA_FQ_SIZE 256
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@ -53,7 +50,7 @@ typedef void (* iova_entry_dtor)(unsigned long data);
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struct iova_fq_entry {
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unsigned long iova_pfn;
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unsigned long pages;
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unsigned long data;
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struct page *freelist;
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u64 counter; /* Flush counter when this entrie was added */
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};
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@ -88,9 +85,6 @@ struct iova_domain {
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iova_flush_cb flush_cb; /* Call-Back function to flush IOMMU
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TLBs */
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iova_entry_dtor entry_dtor; /* IOMMU driver specific destructor for
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iova entry */
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struct timer_list fq_timer; /* Timer to regularily empty the
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flush-queues */
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atomic_t fq_timer_on; /* 1 when timer is active, 0
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@ -146,15 +140,14 @@ void free_iova_fast(struct iova_domain *iovad, unsigned long pfn,
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unsigned long size);
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void queue_iova(struct iova_domain *iovad,
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unsigned long pfn, unsigned long pages,
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unsigned long data);
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struct page *freelist);
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unsigned long alloc_iova_fast(struct iova_domain *iovad, unsigned long size,
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unsigned long limit_pfn, bool flush_rcache);
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struct iova *reserve_iova(struct iova_domain *iovad, unsigned long pfn_lo,
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unsigned long pfn_hi);
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void init_iova_domain(struct iova_domain *iovad, unsigned long granule,
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unsigned long start_pfn);
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int init_iova_flush_queue(struct iova_domain *iovad,
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iova_flush_cb flush_cb, iova_entry_dtor entry_dtor);
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int init_iova_flush_queue(struct iova_domain *iovad, iova_flush_cb flush_cb);
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struct iova *find_iova(struct iova_domain *iovad, unsigned long pfn);
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void put_iova_domain(struct iova_domain *iovad);
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#else
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@ -189,12 +182,6 @@ static inline void free_iova_fast(struct iova_domain *iovad,
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{
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}
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static inline void queue_iova(struct iova_domain *iovad,
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unsigned long pfn, unsigned long pages,
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unsigned long data)
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{
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}
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static inline unsigned long alloc_iova_fast(struct iova_domain *iovad,
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unsigned long size,
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unsigned long limit_pfn,
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@ -216,13 +203,6 @@ static inline void init_iova_domain(struct iova_domain *iovad,
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{
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}
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static inline int init_iova_flush_queue(struct iova_domain *iovad,
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iova_flush_cb flush_cb,
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iova_entry_dtor entry_dtor)
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{
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return -ENODEV;
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}
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static inline struct iova *find_iova(struct iova_domain *iovad,
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unsigned long pfn)
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{
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