static int bridge_brd_mem_write(struct bridge_dev_context *dev_ctxt,
u8 *host_buff, u32 dsp_addr,
u32 ul_num_bytes, u32 mem_type);
-static int bridge_brd_mem_map(struct bridge_dev_context *dev_ctxt,
- u32 ul_mpu_addr, u32 virt_addr,
- u32 ul_num_bytes, u32 ul_map_attr,
- struct page **mapped_pages);
-static int bridge_brd_mem_un_map(struct bridge_dev_context *dev_ctxt,
- u32 da);
static int bridge_dev_create(struct bridge_dev_context
**dev_cntxt,
struct dev_object *hdev_obj,
static int bridge_dev_ctrl(struct bridge_dev_context *dev_context,
u32 dw_cmd, void *pargs);
static int bridge_dev_destroy(struct bridge_dev_context *dev_ctxt);
-static int get_io_pages(struct mm_struct *mm, u32 uva, unsigned pages,
- struct page **usr_pgs);
-static u32 user_va2_pa(struct mm_struct *mm, u32 address);
static int pte_update(struct bridge_dev_context *dev_ctxt, u32 pa,
u32 va, u32 size,
struct hw_mmu_map_attrs_t *map_attrs);
bridge_brd_set_state,
bridge_brd_mem_copy,
bridge_brd_mem_write,
- bridge_brd_mem_map,
- bridge_brd_mem_un_map,
/* The following CHNL functions are provided by chnl_io.lib: */
bridge_chnl_create,
bridge_chnl_destroy,
}
/*
- * ======== bridge_brd_mem_map ========
- * This function maps MPU buffer to the DSP address space. It performs
- * linear to physical address translation if required. It translates each
- * page since linear addresses can be physically non-contiguous
- * All address & size arguments are assumed to be page aligned (in proc.c)
+ * ======== user_va2_pa ========
+ * Purpose:
+ * This function walks through the page tables to convert a userland
+ * virtual address to physical address
+ */
+static u32 user_va2_pa(struct mm_struct *mm, u32 address)
+{
+ pgd_t *pgd;
+ pmd_t *pmd;
+ pte_t *ptep, pte;
+
+ pgd = pgd_offset(mm, address);
+ if (!(pgd_none(*pgd) || pgd_bad(*pgd))) {
+ pmd = pmd_offset(pgd, address);
+ if (!(pmd_none(*pmd) || pmd_bad(*pmd))) {
+ ptep = pte_offset_map(pmd, address);
+ if (ptep) {
+ pte = *ptep;
+ if (pte_present(pte))
+ return pte & PAGE_MASK;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * get_io_pages() - pin and get pages of io user's buffer.
+ * @mm: mm_struct Pointer of the process.
+ * @uva: Virtual user space address.
+ * @pages Pages to be pined.
+ * @usr_pgs struct page array pointer where the user pages will be stored
*
- * TODO: Disable MMU while updating the page tables (but that'll stall DSP)
*/
-static int bridge_brd_mem_map(struct bridge_dev_context *dev_ctx,
- u32 uva, u32 da, u32 size, u32 attr,
- struct page **usr_pgs)
+static int get_io_pages(struct mm_struct *mm, u32 uva, unsigned pages,
+ struct page **usr_pgs)
+{
+ u32 pa;
+ int i;
+ struct page *pg;
+
+ for (i = 0; i < pages; i++) {
+ pa = user_va2_pa(mm, uva);
+ if (!pfn_valid(__phys_to_pfn(pa)))
+ break;
+
+ pg = PHYS_TO_PAGE(pa);
+ usr_pgs[i] = pg;
+ get_page(pg);
+ }
+ return i;
+}
+
+/**
+ * user_to_dsp_map() - maps user to dsp virtual address
+ * @mmu: Pointer to iommu handle.
+ * @uva: Virtual user space address.
+ * @da DSP address
+ * @size Buffer size to map.
+ * @usr_pgs struct page array pointer where the user pages will be stored
+ *
+ * This function maps a user space buffer into DSP virtual address.
+ *
+ */
+u32 user_to_dsp_map(struct iommu *mmu, u32 uva, u32 da, u32 size,
+ struct page **usr_pgs)
{
int res, w;
unsigned pages, i;
- struct iommu *mmu = dev_ctx->dsp_mmu;
struct vm_area_struct *vma;
struct mm_struct *mm = current->mm;
struct sg_table *sgt;
da = iommu_vmap(mmu, da, sgt, IOVMF_ENDIAN_LITTLE | IOVMF_ELSZ_32);
if (!IS_ERR_VALUE(da))
- return 0;
+ return da;
res = (int)da;
sg_free_table(sgt);
return res;
}
-/*
- * ======== bridge_brd_mem_un_map ========
- * Invalidate the PTEs for the DSP VA block to be unmapped.
+/**
+ * user_to_dsp_unmap() - unmaps DSP virtual buffer.
+ * @mmu: Pointer to iommu handle.
+ * @da DSP address
+ *
+ * This function unmaps a user space buffer into DSP virtual address.
*
- * PTEs of a mapped memory block are contiguous in any page table
- * So, instead of looking up the PTE address for every 4K block,
- * we clear consecutive PTEs until we unmap all the bytes
*/
-static int bridge_brd_mem_un_map(struct bridge_dev_context *dev_ctx, u32 da)
+int user_to_dsp_unmap(struct iommu *mmu, u32 da)
{
unsigned i;
struct sg_table *sgt;
struct scatterlist *sg;
- sgt = iommu_vunmap(dev_ctx->dsp_mmu, da);
+ sgt = iommu_vunmap(mmu, da);
if (!sgt)
return -EFAULT;
return 0;
}
-
-static int get_io_pages(struct mm_struct *mm, u32 uva, unsigned pages,
- struct page **usr_pgs)
-{
- u32 pa;
- int i;
- struct page *pg;
-
- for (i = 0; i < pages; i++) {
- pa = user_va2_pa(mm, uva);
-
- if (!pfn_valid(__phys_to_pfn(pa)))
- break;
-
- pg = PHYS_TO_PAGE(pa);
- usr_pgs[i] = pg;
- get_page(pg);
- }
- return i;
-}
-
-/*
- * ======== user_va2_pa ========
- * Purpose:
- * This function walks through the page tables to convert a userland
- * virtual address to physical address
- */
-static u32 user_va2_pa(struct mm_struct *mm, u32 address)
-{
- pgd_t *pgd;
- pmd_t *pmd;
- pte_t *ptep, pte;
-
- pgd = pgd_offset(mm, address);
- if (!(pgd_none(*pgd) || pgd_bad(*pgd))) {
- pmd = pmd_offset(pgd, address);
- if (!(pmd_none(*pmd) || pmd_bad(*pmd))) {
- ptep = pte_offset_map(pmd, address);
- if (ptep) {
- pte = *ptep;
- if (pte_present(pte))
- return pte & PAGE_MASK;
- }
- }
- }
-
- return 0;
-}
-
/*
* ======== pte_update ========
* This function calculates the optimum page-aligned addresses and sizes
projects / mv-sheeva.git / blobdiff