omap: iovmm: remove unused functionality

Remove unused functionality from OMAP's iovmm module.

The intention is to eventually completely replace iovmm with the
generic DMA-API, so new code that'd need this iovmm functionality
will have to extend the DMA-API instead.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

1 files changed, 0 insertions, 201 deletions

diff --git a/drivers/iommu/omap-iovmm.c b/drivers/iommu/omap-iovmm.c
index 809ca124196e..996bec0b4a2b 100644
--- a/drivers/iommu/omap-iovmm.c
+++ b/drivers/iommu/omap-iovmm.c
@@ -25,40 +25,6 @@
 
 #include <plat/iopgtable.h>
 
-/*
- * A device driver needs to create address mappings between:
- *
- * - iommu/device address
- * - physical address
- * - mpu virtual address
- *
- * There are 4 possible patterns for them:
- *
- *    |iova/                      mapping               iommu_          page
- *    | da      pa      va      (d)-(p)-(v)             function        type
- *  ---------------------------------------------------------------------------
- *  1 | c       c       c        1 - 1 - 1        _kmap() / _kunmap()   s
- *  2 | c       c,a     c        1 - 1 - 1      _kmalloc()/ _kfree()    s
- *  3 | c       d       c        1 - n - 1        _vmap() / _vunmap()   s
- *  4 | c       d,a     c        1 - n - 1      _vmalloc()/ _vfree()    n*
- *
- *
- *      'iova': device iommu virtual address
- *      'da':   alias of 'iova'
- *      'pa':   physical address
- *      'va':   mpu virtual address
- *
- *      'c':    contiguous memory area
- *      'd':    discontiguous memory area
- *      'a':    anonymous memory allocation
- *      '()':   optional feature
- *
- *      'n':    a normal page(4KB) size is used.
- *      's':    multiple iommu superpage(16MB, 1MB, 64KB, 4KB) size is used.
- *
- *      '*':    not yet, but feasible.
- */
-
 static struct kmem_cache *iovm_area_cachep;
 
 /* return total bytes of sg buffers */
@@ -419,40 +385,6 @@ static inline void sgtable_drain_vmalloc(struct sg_table *sgt)
         BUG_ON(!sgt);
 }
 
-static void sgtable_fill_kmalloc(struct sg_table *sgt, u32 pa, u32 da,
-                                                                size_t len)
-{
-        unsigned int i;
-        struct scatterlist *sg;
-
-        for_each_sg(sgt->sgl, sg, sgt->nents, i) {
-                unsigned bytes;
-
-                bytes = max_alignment(da | pa);
-                bytes = min_t(unsigned, bytes, iopgsz_max(len));
-
-                BUG_ON(!iopgsz_ok(bytes));
-
-                sg_set_buf(sg, phys_to_virt(pa), bytes);
-                /*
-                 * 'pa' is cotinuous(linear).
-                 */
-                pa += bytes;
-                da += bytes;
-                len -= bytes;
-        }
-        BUG_ON(len);
-}
-
-static inline void sgtable_drain_kmalloc(struct sg_table *sgt)
-{
-        /*
-         * Actually this is not necessary at all, just exists for
-         * consistency of the code readability
-         */
-        BUG_ON(!sgt);
-}
-
 /* create 'da' <-> 'pa' mapping from 'sgt' */
 static int map_iovm_area(struct iommu_domain *domain, struct iovm_struct *new,
                         const struct sg_table *sgt, u32 flags)
@@ -764,139 +696,6 @@ void iommu_vfree(struct iommu_domain *domain, struct iommu *obj, const u32 da)
 }
 EXPORT_SYMBOL_GPL(iommu_vfree);
 
-static u32 __iommu_kmap(struct iommu_domain *domain, struct iommu *obj,
-                        u32 da, u32 pa, void *va, size_t bytes, u32 flags)
-{
-        struct sg_table *sgt;
-
-        sgt = sgtable_alloc(bytes, flags, da, pa);
-        if (IS_ERR(sgt))
-                return PTR_ERR(sgt);
-
-        sgtable_fill_kmalloc(sgt, pa, da, bytes);
-
-        da = map_iommu_region(domain, obj, da, sgt, va, bytes, flags);
-        if (IS_ERR_VALUE(da)) {
-                sgtable_drain_kmalloc(sgt);
-                sgtable_free(sgt);
-        }
-
-        return da;
-}
-
-/**
- * iommu_kmap  -  (d)-(p)-(v) address mapper
- * @obj:        objective iommu
- * @da:         contiguous iommu virtual memory
- * @pa:         contiguous physical memory
- * @flags:      iovma and page property
- *
- * Creates 1-1-1 mapping and returns @da again, which can be
- * adjusted if 'IOVMF_DA_FIXED' is not set.
- */
-u32 iommu_kmap(struct iommu_domain *domain, struct iommu *obj, u32 da, u32 pa,
-                                                size_t bytes, u32 flags)
-{
-        void *va;
-
-        if (!obj || !obj->dev || !bytes)
-                return -EINVAL;
-
-        bytes = PAGE_ALIGN(bytes);
-
-        va = ioremap(pa, bytes);
-        if (!va)
-                return -ENOMEM;
-
-        flags |= IOVMF_LINEAR;
-        flags |= IOVMF_MMIO;
-
-        da = __iommu_kmap(domain, obj, da, pa, va, bytes, flags);
-        if (IS_ERR_VALUE(da))
-                iounmap(va);
-
-        return da;
-}
-EXPORT_SYMBOL_GPL(iommu_kmap);
-
-/**
- * iommu_kunmap  -  release virtual mapping obtained by 'iommu_kmap()'
- * @obj:        objective iommu
- * @da:         iommu device virtual address
- *
- * Frees the iommu virtually contiguous memory area starting at
- * @da, which was passed to and was returned by'iommu_kmap()'.
- */
-void iommu_kunmap(struct iommu_domain *domain, struct iommu *obj, u32 da)
-{
-        struct sg_table *sgt;
-        typedef void (*func_t)(const void *);
-
-        sgt = unmap_vm_area(domain, obj, da, (func_t)iounmap,
-                            IOVMF_LINEAR | IOVMF_MMIO);
-        if (!sgt)
-                dev_dbg(obj->dev, "%s: No sgt\n", __func__);
-        sgtable_free(sgt);
-}
-EXPORT_SYMBOL_GPL(iommu_kunmap);
-
-/**
- * iommu_kmalloc  -  (d)-(p)-(v) address allocator and mapper
- * @obj:        objective iommu
- * @da:         contiguous iommu virtual memory
- * @bytes:      bytes for allocation
- * @flags:      iovma and page property
- *
- * Allocate @bytes linearly and creates 1-1-1 mapping and returns
- * @da again, which might be adjusted if 'IOVMF_DA_FIXED' is not set.
- */
-u32 iommu_kmalloc(struct iommu_domain *domain, struct iommu *obj, u32 da,
-                                                size_t bytes, u32 flags)
-{
-        void *va;
-        u32 pa;
-
-        if (!obj || !obj->dev || !bytes)
-                return -EINVAL;
-
-        bytes = PAGE_ALIGN(bytes);
-
-        va = kmalloc(bytes, GFP_KERNEL | GFP_DMA);
-        if (!va)
-                return -ENOMEM;
-        pa = virt_to_phys(va);
-
-        flags |= IOVMF_LINEAR;
-        flags |= IOVMF_ALLOC;
-
-        da = __iommu_kmap(domain, obj, da, pa, va, bytes, flags);
-        if (IS_ERR_VALUE(da))
-                kfree(va);
-
-        return da;
-}
-EXPORT_SYMBOL_GPL(iommu_kmalloc);
-
-/**
- * iommu_kfree  -  release virtual mapping obtained by 'iommu_kmalloc()'
- * @obj:        objective iommu
- * @da:         iommu device virtual address
- *
- * Frees the iommu virtually contiguous memory area starting at
- * @da, which was passed to and was returned by'iommu_kmalloc()'.
- */
-void iommu_kfree(struct iommu_domain *domain, struct iommu *obj, u32 da)
-{
-        struct sg_table *sgt;
-
-        sgt = unmap_vm_area(domain, obj, da, kfree, IOVMF_LINEAR | IOVMF_ALLOC);
-        if (!sgt)
-                dev_dbg(obj->dev, "%s: No sgt\n", __func__);
-        sgtable_free(sgt);
-}
-EXPORT_SYMBOL_GPL(iommu_kfree);
-
-
 static int __init iovmm_init(void)
 {
         const unsigned long flags = SLAB_HWCACHE_ALIGN;