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authorRussell King <rmk+kernel@arm.linux.org.uk>2012-02-22 17:04:41 -0500
committerRussell King <rmk+kernel@arm.linux.org.uk>2012-02-22 17:04:41 -0500
commit61b80086a525c8a6081257ae40da5dee2bcaee16 (patch)
tree675da35e4c03be3a5ca17bf6430e5b51dfed6296 /arch/arm/mach-bcmring/include
parenta5f17d1f4c2831b9b9bf8b1a537cdbac995d6e13 (diff)
parent230f984662d7e0e4a9597c665fd4f53130666e7d (diff)
Merge branch 'entry-macro-cleanup' of git://sources.calxeda.com/kernel/linux into for-armsoc
Diffstat (limited to 'arch/arm/mach-bcmring/include')
-rw-r--r--arch/arm/mach-bcmring/include/mach/dma.h196
-rw-r--r--arch/arm/mach-bcmring/include/mach/entry-macro.S6
2 files changed, 0 insertions, 202 deletions
diff --git a/arch/arm/mach-bcmring/include/mach/dma.h b/arch/arm/mach-bcmring/include/mach/dma.h
index 1f2c5319c056..72543781207b 100644
--- a/arch/arm/mach-bcmring/include/mach/dma.h
+++ b/arch/arm/mach-bcmring/include/mach/dma.h
@@ -26,15 +26,9 @@
26/* ---- Include Files ---------------------------------------------------- */ 26/* ---- Include Files ---------------------------------------------------- */
27 27
28#include <linux/kernel.h> 28#include <linux/kernel.h>
29#include <linux/wait.h>
30#include <linux/semaphore.h> 29#include <linux/semaphore.h>
31#include <csp/dmacHw.h> 30#include <csp/dmacHw.h>
32#include <mach/timer.h> 31#include <mach/timer.h>
33#include <linux/scatterlist.h>
34#include <linux/dma-mapping.h>
35#include <linux/mm.h>
36#include <linux/vmalloc.h>
37#include <linux/pagemap.h>
38 32
39/* ---- Constants and Types ---------------------------------------------- */ 33/* ---- Constants and Types ---------------------------------------------- */
40 34
@@ -113,78 +107,6 @@ typedef struct {
113 107
114/**************************************************************************** 108/****************************************************************************
115* 109*
116* The DMA_MemType_t and DMA_MemMap_t are helper structures used to setup
117* DMA chains from a variety of memory sources.
118*
119*****************************************************************************/
120
121#define DMA_MEM_MAP_MIN_SIZE 4096 /* Pages less than this size are better */
122 /* off not being DMA'd. */
123
124typedef enum {
125 DMA_MEM_TYPE_NONE, /* Not a valid setting */
126 DMA_MEM_TYPE_VMALLOC, /* Memory came from vmalloc call */
127 DMA_MEM_TYPE_KMALLOC, /* Memory came from kmalloc call */
128 DMA_MEM_TYPE_DMA, /* Memory came from dma_alloc_xxx call */
129 DMA_MEM_TYPE_USER, /* Memory came from user space. */
130
131} DMA_MemType_t;
132
133/* A segment represents a physically and virtually contiguous chunk of memory. */
134/* i.e. each segment can be DMA'd */
135/* A user of the DMA code will add memory regions. Each region may need to be */
136/* represented by one or more segments. */
137
138typedef struct {
139 void *virtAddr; /* Virtual address used for this segment */
140 dma_addr_t physAddr; /* Physical address this segment maps to */
141 size_t numBytes; /* Size of the segment, in bytes */
142
143} DMA_Segment_t;
144
145/* A region represents a virtually contiguous chunk of memory, which may be */
146/* made up of multiple segments. */
147
148typedef struct {
149 DMA_MemType_t memType;
150 void *virtAddr;
151 size_t numBytes;
152
153 /* Each region (virtually contiguous) consists of one or more segments. Each */
154 /* segment is virtually and physically contiguous. */
155
156 int numSegmentsUsed;
157 int numSegmentsAllocated;
158 DMA_Segment_t *segment;
159
160 /* When a region corresponds to user memory, we need to lock all of the pages */
161 /* down before we can figure out the physical addresses. The lockedPage array contains */
162 /* the pages that were locked, and which subsequently need to be unlocked once the */
163 /* memory is unmapped. */
164
165 unsigned numLockedPages;
166 struct page **lockedPages;
167
168} DMA_Region_t;
169
170typedef struct {
171 int inUse; /* Is this mapping currently being used? */
172 struct semaphore lock; /* Acquired when using this structure */
173 enum dma_data_direction dir; /* Direction this transfer is intended for */
174
175 /* In the event that we're mapping user memory, we need to know which task */
176 /* the memory is for, so that we can obtain the correct mm locks. */
177
178 struct task_struct *userTask;
179
180 int numRegionsUsed;
181 int numRegionsAllocated;
182 DMA_Region_t *region;
183
184} DMA_MemMap_t;
185
186/****************************************************************************
187*
188* The DMA_DeviceAttribute_t contains information which describes a 110* The DMA_DeviceAttribute_t contains information which describes a
189* particular DMA device (or peripheral). 111* particular DMA device (or peripheral).
190* 112*
@@ -570,124 +492,6 @@ int dma_alloc_double_dst_descriptors(DMA_Handle_t handle, /* DMA Handle */
570 492
571/****************************************************************************/ 493/****************************************************************************/
572/** 494/**
573* Initializes a DMA_MemMap_t data structure
574*/
575/****************************************************************************/
576
577int dma_init_mem_map(DMA_MemMap_t *memMap /* Stores state information about the map */
578 );
579
580/****************************************************************************/
581/**
582* Releases any memory currently being held by a memory mapping structure.
583*/
584/****************************************************************************/
585
586int dma_term_mem_map(DMA_MemMap_t *memMap /* Stores state information about the map */
587 );
588
589/****************************************************************************/
590/**
591* Looks at a memory address and categorizes it.
592*
593* @return One of the values from the DMA_MemType_t enumeration.
594*/
595/****************************************************************************/
596
597DMA_MemType_t dma_mem_type(void *addr);
598
599/****************************************************************************/
600/**
601* Sets the process (aka userTask) associated with a mem map. This is
602* required if user-mode segments will be added to the mapping.
603*/
604/****************************************************************************/
605
606static inline void dma_mem_map_set_user_task(DMA_MemMap_t *memMap,
607 struct task_struct *task)
608{
609 memMap->userTask = task;
610}
611
612/****************************************************************************/
613/**
614* Looks at a memory address and determines if we support DMA'ing to/from
615* that type of memory.
616*
617* @return boolean -
618* return value != 0 means dma supported
619* return value == 0 means dma not supported
620*/
621/****************************************************************************/
622
623int dma_mem_supports_dma(void *addr);
624
625/****************************************************************************/
626/**
627* Initializes a memory map for use. Since this function acquires a
628* sempaphore within the memory map, it is VERY important that dma_unmap
629* be called when you're finished using the map.
630*/
631/****************************************************************************/
632
633int dma_map_start(DMA_MemMap_t *memMap, /* Stores state information about the map */
634 enum dma_data_direction dir /* Direction that the mapping will be going */
635 );
636
637/****************************************************************************/
638/**
639* Adds a segment of memory to a memory map.
640*
641* @return 0 on success, error code otherwise.
642*/
643/****************************************************************************/
644
645int dma_map_add_region(DMA_MemMap_t *memMap, /* Stores state information about the map */
646 void *mem, /* Virtual address that we want to get a map of */
647 size_t numBytes /* Number of bytes being mapped */
648 );
649
650/****************************************************************************/
651/**
652* Creates a descriptor ring from a memory mapping.
653*
654* @return 0 on success, error code otherwise.
655*/
656/****************************************************************************/
657
658int dma_map_create_descriptor_ring(DMA_Device_t dev, /* DMA device (where the ring is stored) */
659 DMA_MemMap_t *memMap, /* Memory map that will be used */
660 dma_addr_t devPhysAddr /* Physical address of device */
661 );
662
663/****************************************************************************/
664/**
665* Maps in a memory region such that it can be used for performing a DMA.
666*
667* @return
668*/
669/****************************************************************************/
670
671int dma_map_mem(DMA_MemMap_t *memMap, /* Stores state information about the map */
672 void *addr, /* Virtual address that we want to get a map of */
673 size_t count, /* Number of bytes being mapped */
674 enum dma_data_direction dir /* Direction that the mapping will be going */
675 );
676
677/****************************************************************************/
678/**
679* Maps in a memory region such that it can be used for performing a DMA.
680*
681* @return
682*/
683/****************************************************************************/
684
685int dma_unmap(DMA_MemMap_t *memMap, /* Stores state information about the map */
686 int dirtied /* non-zero if any of the pages were modified */
687 );
688
689/****************************************************************************/
690/**
691* Initiates a transfer when the descriptors have already been setup. 495* Initiates a transfer when the descriptors have already been setup.
692* 496*
693* This is a special case, and normally, the dma_transfer_xxx functions should 497* This is a special case, and normally, the dma_transfer_xxx functions should
diff --git a/arch/arm/mach-bcmring/include/mach/entry-macro.S b/arch/arm/mach-bcmring/include/mach/entry-macro.S
index 94c950d783ba..2f316f0e6e69 100644
--- a/arch/arm/mach-bcmring/include/mach/entry-macro.S
+++ b/arch/arm/mach-bcmring/include/mach/entry-macro.S
@@ -21,9 +21,6 @@
21#include <mach/hardware.h> 21#include <mach/hardware.h>
22#include <mach/csp/mm_io.h> 22#include <mach/csp/mm_io.h>
23 23
24 .macro disable_fiq
25 .endm
26
27 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp 24 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
28 ldr \base, =(MM_IO_BASE_INTC0) 25 ldr \base, =(MM_IO_BASE_INTC0)
29 ldr \irqstat, [\base, #0] @ get status 26 ldr \irqstat, [\base, #0] @ get status
@@ -77,6 +74,3 @@
77 74
78 .macro get_irqnr_preamble, base, tmp 75 .macro get_irqnr_preamble, base, tmp
79 .endm 76 .endm
80
81 .macro arch_ret_to_user, tmp1, tmp2
82 .endm