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Diffstat (limited to 'include/asm-s390/idals.h')
-rw-r--r--include/asm-s390/idals.h256
1 files changed, 0 insertions, 256 deletions
diff --git a/include/asm-s390/idals.h b/include/asm-s390/idals.h
deleted file mode 100644
index e82c10efe65a..000000000000
--- a/include/asm-s390/idals.h
+++ /dev/null
@@ -1,256 +0,0 @@
-/*
- * File...........: linux/include/asm-s390x/idals.h
- * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
- * Martin Schwidefsky <schwidefsky@de.ibm.com>
- * Bugreports.to..: <Linux390@de.ibm.com>
- * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2000a
-
- * History of changes
- * 07/24/00 new file
- * 05/04/02 code restructuring.
- */
-
-#ifndef _S390_IDALS_H
-#define _S390_IDALS_H
-
-#include <linux/errno.h>
-#include <linux/err.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <asm/cio.h>
-#include <asm/uaccess.h>
-
-#ifdef __s390x__
-#define IDA_SIZE_LOG 12 /* 11 for 2k , 12 for 4k */
-#else
-#define IDA_SIZE_LOG 11 /* 11 for 2k , 12 for 4k */
-#endif
-#define IDA_BLOCK_SIZE (1L<<IDA_SIZE_LOG)
-
-/*
- * Test if an address/length pair needs an idal list.
- */
-static inline int
-idal_is_needed(void *vaddr, unsigned int length)
-{
-#ifdef __s390x__
- return ((__pa(vaddr) + length - 1) >> 31) != 0;
-#else
- return 0;
-#endif
-}
-
-
-/*
- * Return the number of idal words needed for an address/length pair.
- */
-static inline unsigned int
-idal_nr_words(void *vaddr, unsigned int length)
-{
-#ifdef __s390x__
- if (idal_is_needed(vaddr, length))
- return ((__pa(vaddr) & (IDA_BLOCK_SIZE-1)) + length +
- (IDA_BLOCK_SIZE-1)) >> IDA_SIZE_LOG;
-#endif
- return 0;
-}
-
-/*
- * Create the list of idal words for an address/length pair.
- */
-static inline unsigned long *
-idal_create_words(unsigned long *idaws, void *vaddr, unsigned int length)
-{
-#ifdef __s390x__
- unsigned long paddr;
- unsigned int cidaw;
-
- paddr = __pa(vaddr);
- cidaw = ((paddr & (IDA_BLOCK_SIZE-1)) + length +
- (IDA_BLOCK_SIZE-1)) >> IDA_SIZE_LOG;
- *idaws++ = paddr;
- paddr &= -IDA_BLOCK_SIZE;
- while (--cidaw > 0) {
- paddr += IDA_BLOCK_SIZE;
- *idaws++ = paddr;
- }
-#endif
- return idaws;
-}
-
-/*
- * Sets the address of the data in CCW.
- * If necessary it allocates an IDAL and sets the appropriate flags.
- */
-static inline int
-set_normalized_cda(struct ccw1 * ccw, void *vaddr)
-{
-#ifdef __s390x__
- unsigned int nridaws;
- unsigned long *idal;
-
- if (ccw->flags & CCW_FLAG_IDA)
- return -EINVAL;
- nridaws = idal_nr_words(vaddr, ccw->count);
- if (nridaws > 0) {
- idal = kmalloc(nridaws * sizeof(unsigned long),
- GFP_ATOMIC | GFP_DMA );
- if (idal == NULL)
- return -ENOMEM;
- idal_create_words(idal, vaddr, ccw->count);
- ccw->flags |= CCW_FLAG_IDA;
- vaddr = idal;
- }
-#endif
- ccw->cda = (__u32)(unsigned long) vaddr;
- return 0;
-}
-
-/*
- * Releases any allocated IDAL related to the CCW.
- */
-static inline void
-clear_normalized_cda(struct ccw1 * ccw)
-{
-#ifdef __s390x__
- if (ccw->flags & CCW_FLAG_IDA) {
- kfree((void *)(unsigned long) ccw->cda);
- ccw->flags &= ~CCW_FLAG_IDA;
- }
-#endif
- ccw->cda = 0;
-}
-
-/*
- * Idal buffer extension
- */
-struct idal_buffer {
- size_t size;
- size_t page_order;
- void *data[0];
-};
-
-/*
- * Allocate an idal buffer
- */
-static inline struct idal_buffer *
-idal_buffer_alloc(size_t size, int page_order)
-{
- struct idal_buffer *ib;
- int nr_chunks, nr_ptrs, i;
-
- nr_ptrs = (size + IDA_BLOCK_SIZE - 1) >> IDA_SIZE_LOG;
- nr_chunks = (4096 << page_order) >> IDA_SIZE_LOG;
- ib = kmalloc(sizeof(struct idal_buffer) + nr_ptrs*sizeof(void *),
- GFP_DMA | GFP_KERNEL);
- if (ib == NULL)
- return ERR_PTR(-ENOMEM);
- ib->size = size;
- ib->page_order = page_order;
- for (i = 0; i < nr_ptrs; i++) {
- if ((i & (nr_chunks - 1)) != 0) {
- ib->data[i] = ib->data[i-1] + IDA_BLOCK_SIZE;
- continue;
- }
- ib->data[i] = (void *)
- __get_free_pages(GFP_KERNEL, page_order);
- if (ib->data[i] != NULL)
- continue;
- // Not enough memory
- while (i >= nr_chunks) {
- i -= nr_chunks;
- free_pages((unsigned long) ib->data[i],
- ib->page_order);
- }
- kfree(ib);
- return ERR_PTR(-ENOMEM);
- }
- return ib;
-}
-
-/*
- * Free an idal buffer.
- */
-static inline void
-idal_buffer_free(struct idal_buffer *ib)
-{
- int nr_chunks, nr_ptrs, i;
-
- nr_ptrs = (ib->size + IDA_BLOCK_SIZE - 1) >> IDA_SIZE_LOG;
- nr_chunks = (4096 << ib->page_order) >> IDA_SIZE_LOG;
- for (i = 0; i < nr_ptrs; i += nr_chunks)
- free_pages((unsigned long) ib->data[i], ib->page_order);
- kfree(ib);
-}
-
-/*
- * Test if a idal list is really needed.
- */
-static inline int
-__idal_buffer_is_needed(struct idal_buffer *ib)
-{
-#ifdef __s390x__
- return ib->size > (4096ul << ib->page_order) ||
- idal_is_needed(ib->data[0], ib->size);
-#else
- return ib->size > (4096ul << ib->page_order);
-#endif
-}
-
-/*
- * Set channel data address to idal buffer.
- */
-static inline void
-idal_buffer_set_cda(struct idal_buffer *ib, struct ccw1 *ccw)
-{
- if (__idal_buffer_is_needed(ib)) {
- // setup idals;
- ccw->cda = (u32)(addr_t) ib->data;
- ccw->flags |= CCW_FLAG_IDA;
- } else
- // we do not need idals - use direct addressing
- ccw->cda = (u32)(addr_t) ib->data[0];
- ccw->count = ib->size;
-}
-
-/*
- * Copy count bytes from an idal buffer to user memory
- */
-static inline size_t
-idal_buffer_to_user(struct idal_buffer *ib, void __user *to, size_t count)
-{
- size_t left;
- int i;
-
- BUG_ON(count > ib->size);
- for (i = 0; count > IDA_BLOCK_SIZE; i++) {
- left = copy_to_user(to, ib->data[i], IDA_BLOCK_SIZE);
- if (left)
- return left + count - IDA_BLOCK_SIZE;
- to = (void __user *) to + IDA_BLOCK_SIZE;
- count -= IDA_BLOCK_SIZE;
- }
- return copy_to_user(to, ib->data[i], count);
-}
-
-/*
- * Copy count bytes from user memory to an idal buffer
- */
-static inline size_t
-idal_buffer_from_user(struct idal_buffer *ib, const void __user *from, size_t count)
-{
- size_t left;
- int i;
-
- BUG_ON(count > ib->size);
- for (i = 0; count > IDA_BLOCK_SIZE; i++) {
- left = copy_from_user(ib->data[i], from, IDA_BLOCK_SIZE);
- if (left)
- return left + count - IDA_BLOCK_SIZE;
- from = (void __user *) from + IDA_BLOCK_SIZE;
- count -= IDA_BLOCK_SIZE;
- }
- return copy_from_user(ib->data[i], from, count);
-}
-
-#endif
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