diff options
| author | Krishna Gudipati <kgudipat@brocade.com> | 2011-06-25 07:24:29 +0400 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2011-06-30 02:11:09 +0400 |
| commit | 4507025d01149aea8705e43508d0ef11e7010cfd (patch) | |
| tree | 937fefad76c8534bd42e0d1e46659db61ea57288 /drivers/scsi/bfa/bfi.h | |
| parent | 3fd459804ff8e002db2671900debd0fc6dc6c443 (diff) | |
| download | linux-4507025d01149aea8705e43508d0ef11e7010cfd.tar.xz | |
[SCSI] bfa: DMA memory allocation enhancement.
- Modified the design such that each BFA sub-module will provide
the amount of DMA and KVA memory needed by it and queues the
same request to the global dma and kva info queues.
- During the memory allocation we iterate over this queue to allocate
the dma and kva memory requested by sub-modules.
- The change is needed to avoid requesting the aggregate amount of memory
needed by all the BFA sub-modules as one contiguous chunk.
Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/bfa/bfi.h')
| -rw-r--r-- | drivers/scsi/bfa/bfi.h | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/scsi/bfa/bfi.h b/drivers/scsi/bfa/bfi.h index 40002f4ea008..d36c81b88f69 100644 --- a/drivers/scsi/bfa/bfi.h +++ b/drivers/scsi/bfa/bfi.h @@ -23,6 +23,24 @@ #pragma pack(1) +/* Per dma segment max size */ +#define BFI_MEM_DMA_SEG_SZ (131072) + +/* Get number of dma segments required */ +#define BFI_MEM_DMA_NSEGS(_num_reqs, _req_sz) \ + ((u16)(((((_num_reqs) * (_req_sz)) + BFI_MEM_DMA_SEG_SZ - 1) & \ + ~(BFI_MEM_DMA_SEG_SZ - 1)) / BFI_MEM_DMA_SEG_SZ)) + +/* Get num dma reqs - that fit in a segment */ +#define BFI_MEM_NREQS_SEG(_rqsz) (BFI_MEM_DMA_SEG_SZ / (_rqsz)) + +/* Get segment num from tag */ +#define BFI_MEM_SEG_FROM_TAG(_tag, _rqsz) ((_tag) / BFI_MEM_NREQS_SEG(_rqsz)) + +/* Get dma req offset in a segment */ +#define BFI_MEM_SEG_REQ_OFFSET(_tag, _sz) \ + ((_tag) - (BFI_MEM_SEG_FROM_TAG(_tag, _sz) * BFI_MEM_NREQS_SEG(_sz))) + /* * BFI FW image type */ @@ -46,7 +64,6 @@ struct bfi_mhdr_s { #define bfi_fn_lpu(__fn, __lpu) ((__fn) << 1 | (__lpu)) #define bfi_mhdr_2_fn(_mh) ((_mh)->mtag.h2i.fn_lpu >> 1) -#define bfi_mhdr_2_qid(_m) ((_mh)->mtag.h2i.qid) #define bfi_h2i_set(_mh, _mc, _op, _fn_lpu) do { \ (_mh).msg_class = (_mc); \ @@ -133,6 +150,12 @@ struct bfi_sgpg_s { u32 rsvd[BFI_SGPG_RSVD_WD_LEN]; }; +/* FCP module definitions */ +#define BFI_IO_MAX (2000) +#define BFI_IOIM_SNSLEN (256) +#define BFI_IOIM_SNSBUF_SEGS \ + BFI_MEM_DMA_NSEGS(BFI_IO_MAX, BFI_IOIM_SNSLEN) + /* * Large Message structure - 128 Bytes size Msgs */ |