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authorTakashi Iwai <tiwai@suse.de>2014-02-20 01:50:32 -0500
committerTakashi Iwai <tiwai@suse.de>2014-02-20 01:50:32 -0500
commitf31f40be8f82d5eeb4ca084f9ac0f11ca265876b (patch)
tree6fce9ac78045249084d641945e094dcaea72d265 /include/xen/interface/io/blkif.h
parent13c12dbe3a2ce17227f7ddef652b6a53c78fa51f (diff)
parent895be5b31e5175bef575008aadb4f0a27b850daa (diff)
Merge tag 'asoc-v3.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v3.14 A few fixes, all driver speccific ones. The DaVinci ones aren't as clear as they should be from the subject lines on the commits but they fix issues which will prevent correct operation in some use cases and only affect that particular driver so are reasonably safe.
Diffstat (limited to 'include/xen/interface/io/blkif.h')
-rw-r--r--include/xen/interface/io/blkif.h34
1 files changed, 14 insertions, 20 deletions
diff --git a/include/xen/interface/io/blkif.h b/include/xen/interface/io/blkif.h
index ae665ac59c36..32ec05a6572f 100644
--- a/include/xen/interface/io/blkif.h
+++ b/include/xen/interface/io/blkif.h
@@ -113,13 +113,13 @@ typedef uint64_t blkif_sector_t;
113 * it's less than the number provided by the backend. The indirect_grefs field 113 * it's less than the number provided by the backend. The indirect_grefs field
114 * in blkif_request_indirect should be filled by the frontend with the 114 * in blkif_request_indirect should be filled by the frontend with the
115 * grant references of the pages that are holding the indirect segments. 115 * grant references of the pages that are holding the indirect segments.
116 * This pages are filled with an array of blkif_request_segment_aligned 116 * These pages are filled with an array of blkif_request_segment that hold the
117 * that hold the information about the segments. The number of indirect 117 * information about the segments. The number of indirect pages to use is
118 * pages to use is determined by the maximum number of segments 118 * determined by the number of segments an indirect request contains. Every
119 * a indirect request contains. Every indirect page can contain a maximum 119 * indirect page can contain a maximum of
120 * of 512 segments (PAGE_SIZE/sizeof(blkif_request_segment_aligned)), 120 * (PAGE_SIZE / sizeof(struct blkif_request_segment)) segments, so to
121 * so to calculate the number of indirect pages to use we have to do 121 * calculate the number of indirect pages to use we have to do
122 * ceil(indirect_segments/512). 122 * ceil(indirect_segments / (PAGE_SIZE / sizeof(struct blkif_request_segment))).
123 * 123 *
124 * If a backend does not recognize BLKIF_OP_INDIRECT, it should *not* 124 * If a backend does not recognize BLKIF_OP_INDIRECT, it should *not*
125 * create the "feature-max-indirect-segments" node! 125 * create the "feature-max-indirect-segments" node!
@@ -135,13 +135,12 @@ typedef uint64_t blkif_sector_t;
135 135
136#define BLKIF_MAX_INDIRECT_PAGES_PER_REQUEST 8 136#define BLKIF_MAX_INDIRECT_PAGES_PER_REQUEST 8
137 137
138struct blkif_request_segment_aligned { 138struct blkif_request_segment {
139 grant_ref_t gref; /* reference to I/O buffer frame */ 139 grant_ref_t gref; /* reference to I/O buffer frame */
140 /* @first_sect: first sector in frame to transfer (inclusive). */ 140 /* @first_sect: first sector in frame to transfer (inclusive). */
141 /* @last_sect: last sector in frame to transfer (inclusive). */ 141 /* @last_sect: last sector in frame to transfer (inclusive). */
142 uint8_t first_sect, last_sect; 142 uint8_t first_sect, last_sect;
143 uint16_t _pad; /* padding to make it 8 bytes, so it's cache-aligned */ 143};
144} __attribute__((__packed__));
145 144
146struct blkif_request_rw { 145struct blkif_request_rw {
147 uint8_t nr_segments; /* number of segments */ 146 uint8_t nr_segments; /* number of segments */
@@ -151,12 +150,7 @@ struct blkif_request_rw {
151#endif 150#endif
152 uint64_t id; /* private guest value, echoed in resp */ 151 uint64_t id; /* private guest value, echoed in resp */
153 blkif_sector_t sector_number;/* start sector idx on disk (r/w only) */ 152 blkif_sector_t sector_number;/* start sector idx on disk (r/w only) */
154 struct blkif_request_segment { 153 struct blkif_request_segment seg[BLKIF_MAX_SEGMENTS_PER_REQUEST];
155 grant_ref_t gref; /* reference to I/O buffer frame */
156 /* @first_sect: first sector in frame to transfer (inclusive). */
157 /* @last_sect: last sector in frame to transfer (inclusive). */
158 uint8_t first_sect, last_sect;
159 } seg[BLKIF_MAX_SEGMENTS_PER_REQUEST];
160} __attribute__((__packed__)); 154} __attribute__((__packed__));
161 155
162struct blkif_request_discard { 156struct blkif_request_discard {