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authorKrishna Gudipati <kgudipat@brocade.com>2011-06-24 20:24:29 -0700
committerJames Bottomley <JBottomley@Parallels.com>2011-06-29 17:11:09 -0500
commit4507025d01149aea8705e43508d0ef11e7010cfd (patch)
tree937fefad76c8534bd42e0d1e46659db61ea57288 /drivers/scsi/bfa/bfa_ioc.h
parent3fd459804ff8e002db2671900debd0fc6dc6c443 (diff)
downloadop-kernel-dev-4507025d01149aea8705e43508d0ef11e7010cfd.zip
op-kernel-dev-4507025d01149aea8705e43508d0ef11e7010cfd.tar.gz
[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/bfa_ioc.h')
-rw-r--r--drivers/scsi/bfa/bfa_ioc.h64
1 files changed, 64 insertions, 0 deletions
diff --git a/drivers/scsi/bfa/bfa_ioc.h b/drivers/scsi/bfa/bfa_ioc.h
index 1055ca9..83c3f2f 100644
--- a/drivers/scsi/bfa/bfa_ioc.h
+++ b/drivers/scsi/bfa/bfa_ioc.h
@@ -85,6 +85,68 @@ struct bfa_sge_s {
#endif
/*
+ * BFA memory resources
+ */
+struct bfa_mem_dma_s {
+ struct list_head qe; /* Queue of DMA elements */
+ u32 mem_len; /* Total Length in Bytes */
+ u8 *kva; /* kernel virtual address */
+ u64 dma; /* dma address if DMA memory */
+ u8 *kva_curp; /* kva allocation cursor */
+ u64 dma_curp; /* dma allocation cursor */
+};
+#define bfa_mem_dma_t struct bfa_mem_dma_s
+
+struct bfa_mem_kva_s {
+ struct list_head qe; /* Queue of KVA elements */
+ u32 mem_len; /* Total Length in Bytes */
+ u8 *kva; /* kernel virtual address */
+ u8 *kva_curp; /* kva allocation cursor */
+};
+#define bfa_mem_kva_t struct bfa_mem_kva_s
+
+struct bfa_meminfo_s {
+ struct bfa_mem_dma_s dma_info;
+ struct bfa_mem_kva_s kva_info;
+};
+
+/* BFA memory segment setup macros */
+#define bfa_mem_dma_setup(_meminfo, _dm_ptr, _seg_sz) do { \
+ ((bfa_mem_dma_t *)(_dm_ptr))->mem_len = (_seg_sz); \
+ if (_seg_sz) \
+ list_add_tail(&((bfa_mem_dma_t *)_dm_ptr)->qe, \
+ &(_meminfo)->dma_info.qe); \
+} while (0)
+
+#define bfa_mem_kva_setup(_meminfo, _kva_ptr, _seg_sz) do { \
+ ((bfa_mem_kva_t *)(_kva_ptr))->mem_len = (_seg_sz); \
+ if (_seg_sz) \
+ list_add_tail(&((bfa_mem_kva_t *)_kva_ptr)->qe, \
+ &(_meminfo)->kva_info.qe); \
+} while (0)
+
+/* BFA dma memory segments iterator */
+#define bfa_mem_dma_sptr(_mod, _i) (&(_mod)->dma_seg[(_i)])
+#define bfa_mem_dma_seg_iter(_mod, _sptr, _nr, _i) \
+ for (_i = 0, _sptr = bfa_mem_dma_sptr(_mod, _i); _i < (_nr); \
+ _i++, _sptr = bfa_mem_dma_sptr(_mod, _i))
+
+#define bfa_mem_kva_curp(_mod) ((_mod)->kva_seg.kva_curp)
+#define bfa_mem_dma_virt(_sptr) ((_sptr)->kva_curp)
+#define bfa_mem_dma_phys(_sptr) ((_sptr)->dma_curp)
+#define bfa_mem_dma_len(_sptr) ((_sptr)->mem_len)
+
+/* Get the corresponding dma buf kva for a req - from the tag */
+#define bfa_mem_get_dmabuf_kva(_mod, _tag, _rqsz) \
+ (((u8 *)(_mod)->dma_seg[BFI_MEM_SEG_FROM_TAG(_tag, _rqsz)].kva_curp) +\
+ BFI_MEM_SEG_REQ_OFFSET(_tag, _rqsz) * (_rqsz))
+
+/* Get the corresponding dma buf pa for a req - from the tag */
+#define bfa_mem_get_dmabuf_pa(_mod, _tag, _rqsz) \
+ ((_mod)->dma_seg[BFI_MEM_SEG_FROM_TAG(_tag, _rqsz)].dma_curp + \
+ BFI_MEM_SEG_REQ_OFFSET(_tag, _rqsz) * (_rqsz))
+
+/*
* PCI device information required by IOC
*/
struct bfa_pcidev_s {
@@ -301,7 +363,9 @@ struct bfa_ablk_s {
bfa_ablk_cbfn_t cbfn;
void *cbarg;
struct bfa_ioc_notify_s ioc_notify;
+ struct bfa_mem_dma_s ablk_dma;
};
+#define BFA_MEM_ABLK_DMA(__bfa) (&((__bfa)->modules.ablk.ablk_dma))
#define bfa_ioc_pcifn(__ioc) ((__ioc)->pcidev.pci_func)
#define bfa_ioc_devid(__ioc) ((__ioc)->pcidev.device_id)
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