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authorAndrea Bastoni <bastoni@cs.unc.edu>2010-05-30 19:16:45 -0400
committerAndrea Bastoni <bastoni@cs.unc.edu>2010-05-30 19:16:45 -0400
commitada47b5fe13d89735805b566185f4885f5a3f750 (patch)
tree644b88f8a71896307d71438e9b3af49126ffb22b /arch/alpha/include/asm/pci.h
parent43e98717ad40a4ae64545b5ba047c7b86aa44f4f (diff)
parent3280f21d43ee541f97f8cda5792150d2dbec20d5 (diff)
Merge branch 'wip-2.6.34' into old-private-masterarchived-private-master
Diffstat (limited to 'arch/alpha/include/asm/pci.h')
-rw-r--r--arch/alpha/include/asm/pci.h139
1 files changed, 3 insertions, 136 deletions
diff --git a/arch/alpha/include/asm/pci.h b/arch/alpha/include/asm/pci.h
index dd8dcabf160f..28d0497fd3c7 100644
--- a/arch/alpha/include/asm/pci.h
+++ b/arch/alpha/include/asm/pci.h
@@ -70,142 +70,11 @@ extern inline void pcibios_penalize_isa_irq(int irq, int active)
70 decisions. */ 70 decisions. */
71#define PCI_DMA_BUS_IS_PHYS 0 71#define PCI_DMA_BUS_IS_PHYS 0
72 72
73/* Allocate and map kernel buffer using consistent mode DMA for PCI 73#ifdef CONFIG_PCI
74 device. Returns non-NULL cpu-view pointer to the buffer if
75 successful and sets *DMA_ADDRP to the pci side dma address as well,
76 else DMA_ADDRP is undefined. */
77
78extern void *__pci_alloc_consistent(struct pci_dev *, size_t,
79 dma_addr_t *, gfp_t);
80static inline void *
81pci_alloc_consistent(struct pci_dev *dev, size_t size, dma_addr_t *dma)
82{
83 return __pci_alloc_consistent(dev, size, dma, GFP_ATOMIC);
84}
85
86/* Free and unmap a consistent DMA buffer. CPU_ADDR and DMA_ADDR must
87 be values that were returned from pci_alloc_consistent. SIZE must
88 be the same as what as passed into pci_alloc_consistent.
89 References to the memory and mappings associated with CPU_ADDR or
90 DMA_ADDR past this call are illegal. */
91
92extern void pci_free_consistent(struct pci_dev *, size_t, void *, dma_addr_t);
93
94/* Map a single buffer of the indicate size for PCI DMA in streaming mode.
95 The 32-bit PCI bus mastering address to use is returned. Once the device
96 is given the dma address, the device owns this memory until either
97 pci_unmap_single or pci_dma_sync_single_for_cpu is performed. */
98
99extern dma_addr_t pci_map_single(struct pci_dev *, void *, size_t, int);
100
101/* Likewise, but for a page instead of an address. */
102extern dma_addr_t pci_map_page(struct pci_dev *, struct page *,
103 unsigned long, size_t, int);
104
105/* Test for pci_map_single or pci_map_page having generated an error. */
106
107static inline int
108pci_dma_mapping_error(struct pci_dev *pdev, dma_addr_t dma_addr)
109{
110 return dma_addr == 0;
111}
112
113/* Unmap a single streaming mode DMA translation. The DMA_ADDR and
114 SIZE must match what was provided for in a previous pci_map_single
115 call. All other usages are undefined. After this call, reads by
116 the cpu to the buffer are guaranteed to see whatever the device
117 wrote there. */
118
119extern void pci_unmap_single(struct pci_dev *, dma_addr_t, size_t, int);
120extern void pci_unmap_page(struct pci_dev *, dma_addr_t, size_t, int);
121
122/* pci_unmap_{single,page} is not a nop, thus... */
123#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
124 dma_addr_t ADDR_NAME;
125#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
126 __u32 LEN_NAME;
127#define pci_unmap_addr(PTR, ADDR_NAME) \
128 ((PTR)->ADDR_NAME)
129#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
130 (((PTR)->ADDR_NAME) = (VAL))
131#define pci_unmap_len(PTR, LEN_NAME) \
132 ((PTR)->LEN_NAME)
133#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
134 (((PTR)->LEN_NAME) = (VAL))
135
136/* Map a set of buffers described by scatterlist in streaming mode for
137 PCI DMA. This is the scatter-gather version of the above
138 pci_map_single interface. Here the scatter gather list elements
139 are each tagged with the appropriate PCI dma address and length.
140 They are obtained via sg_dma_{address,length}(SG).
141
142 NOTE: An implementation may be able to use a smaller number of DMA
143 address/length pairs than there are SG table elements. (for
144 example via virtual mapping capabilities) The routine returns the
145 number of addr/length pairs actually used, at most nents.
146
147 Device ownership issues as mentioned above for pci_map_single are
148 the same here. */
149
150extern int pci_map_sg(struct pci_dev *, struct scatterlist *, int, int);
151
152/* Unmap a set of streaming mode DMA translations. Again, cpu read
153 rules concerning calls here are the same as for pci_unmap_single()
154 above. */
155
156extern void pci_unmap_sg(struct pci_dev *, struct scatterlist *, int, int);
157
158/* Make physical memory consistent for a single streaming mode DMA
159 translation after a transfer and device currently has ownership
160 of the buffer.
161
162 If you perform a pci_map_single() but wish to interrogate the
163 buffer using the cpu, yet do not wish to teardown the PCI dma
164 mapping, you must call this function before doing so. At the next
165 point you give the PCI dma address back to the card, you must first
166 perform a pci_dma_sync_for_device, and then the device again owns
167 the buffer. */
168
169static inline void
170pci_dma_sync_single_for_cpu(struct pci_dev *dev, dma_addr_t dma_addr,
171 long size, int direction)
172{
173 /* Nothing to do. */
174}
175
176static inline void
177pci_dma_sync_single_for_device(struct pci_dev *dev, dma_addr_t dma_addr,
178 size_t size, int direction)
179{
180 /* Nothing to do. */
181}
182
183/* Make physical memory consistent for a set of streaming mode DMA
184 translations after a transfer. The same as pci_dma_sync_single_*
185 but for a scatter-gather list, same rules and usage. */
186
187static inline void
188pci_dma_sync_sg_for_cpu(struct pci_dev *dev, struct scatterlist *sg,
189 int nents, int direction)
190{
191 /* Nothing to do. */
192}
193
194static inline void
195pci_dma_sync_sg_for_device(struct pci_dev *dev, struct scatterlist *sg,
196 int nents, int direction)
197{
198 /* Nothing to do. */
199}
200
201/* Return whether the given PCI device DMA address mask can
202 be supported properly. For example, if your device can
203 only drive the low 24-bits during PCI bus mastering, then
204 you would pass 0x00ffffff as the mask to this function. */
205 74
206extern int pci_dma_supported(struct pci_dev *hwdev, u64 mask); 75/* implement the pci_ DMA API in terms of the generic device dma_ one */
76#include <asm-generic/pci-dma-compat.h>
207 77
208#ifdef CONFIG_PCI
209static inline void pci_dma_burst_advice(struct pci_dev *pdev, 78static inline void pci_dma_burst_advice(struct pci_dev *pdev,
210 enum pci_dma_burst_strategy *strat, 79 enum pci_dma_burst_strategy *strat,
211 unsigned long *strategy_parameter) 80 unsigned long *strategy_parameter)
@@ -244,8 +113,6 @@ static inline int pci_proc_domain(struct pci_bus *bus)
244 return hose->need_domain_info; 113 return hose->need_domain_info;
245} 114}
246 115
247struct pci_dev *alpha_gendev_to_pci(struct device *dev);
248
249#endif /* __KERNEL__ */ 116#endif /* __KERNEL__ */
250 117
251/* Values for the `which' argument to sys_pciconfig_iobase. */ 118/* Values for the `which' argument to sys_pciconfig_iobase. */