Mark Lord wrote:
Robert Hancock wrote:
+/* ADMA Physical Region Descriptor - one SG segment */
+struct nv_adma_prd {
+ __le64 addr;
+ __le32 len;
+ u8 flags;
+ u8 packet_len;
+ __le16 reserved;
+};
..
+/* ADMA Command Parameter Block
+ The first 5 SG segments are stored inside the Command Parameter
Block itself.
+ If there are more than 5 segments the remainder are stored in a
separate
+ memory area indicated by next_aprd. */
+struct nv_adma_cpb {
+ u8 resp_flags; //0
+ u8 reserved1; //1
+ u8 ctl_flags; //2
+ // len is length of taskfile in 64 bit words
+ u8 len; //3 + u8
tag; //4
+ u8 next_cpb_idx; //5
+ __le16 reserved2; //6-7
+ __le16 tf[12]; //8-31
+ struct nv_adma_prd aprd[5]; //32-111
+ __le64 next_aprd; //112-119
+ __le64 reserved3; //120-127
+};
Are those CPB / PRD structs endian-safe when using a big-endian CPU?
Cheers
They should be, I believe cpu_to_leXX is used whenever the multi-byte
elements are being written. Not that anyone would likely install a
big-endian CPU on an nForce4 chipset ;-)
--
Robert Hancock Saskatoon, SK, Canada
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Home Page: http://www.roberthancock.com/
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