[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>

13 files changed, 624 insertions, 569 deletions

diff --git a/drivers/scsi/bfa/bfa.h b/drivers/scsi/bfa/bfa.h
index ee072d99b8f9..67742dca675f 100644
--- a/drivers/scsi/bfa/bfa.h
+++ b/drivers/scsi/bfa/bfa.h
@@ -172,34 +172,6 @@ struct bfa_pciid_s {
 
 extern char     bfa_version[];
 
-/*
- * BFA memory resources
- */
-enum bfa_mem_type {
-	BFA_MEM_TYPE_KVA = 1,	/*  Kernel Virtual Memory *(non-dma-able) */
-	BFA_MEM_TYPE_DMA = 2,	/*  DMA-able memory */
-	BFA_MEM_TYPE_MAX = BFA_MEM_TYPE_DMA,
-};
-
-struct bfa_mem_elem_s {
-	enum bfa_mem_type mem_type;	/* see enum bfa_mem_type */
-	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	*/
-};
-
-struct bfa_meminfo_s {
-	struct bfa_mem_elem_s meminfo[BFA_MEM_TYPE_MAX];
-};
-#define bfa_meminfo_kva(_m)				\
-	((_m)->meminfo[BFA_MEM_TYPE_KVA - 1].kva_curp)
-#define bfa_meminfo_dma_virt(_m)			\
-	((_m)->meminfo[BFA_MEM_TYPE_DMA - 1].kva_curp)
-#define bfa_meminfo_dma_phys(_m)			\
-	((_m)->meminfo[BFA_MEM_TYPE_DMA - 1].dma_curp)
-
 struct bfa_iocfc_regs_s {
 	void __iomem	*intr_status;
 	void __iomem	*intr_mask;
@@ -294,8 +266,19 @@ struct bfa_iocfc_s {
 	void			*updateq_cbarg;	/*  bios callback arg */
 	u32	intr_mask;
 	struct bfa_faa_args_s	faa_args;
+	struct bfa_mem_dma_s	ioc_dma;
+	struct bfa_mem_dma_s	iocfc_dma;
+	struct bfa_mem_dma_s	reqq_dma[BFI_IOC_MAX_CQS];
+	struct bfa_mem_dma_s	rspq_dma[BFI_IOC_MAX_CQS];
+	struct bfa_mem_kva_s	kva_seg;
 };
 
+#define BFA_MEM_IOC_DMA(_bfa)		(&((_bfa)->iocfc.ioc_dma))
+#define BFA_MEM_IOCFC_DMA(_bfa)		(&((_bfa)->iocfc.iocfc_dma))
+#define BFA_MEM_REQQ_DMA(_bfa, _qno)	(&((_bfa)->iocfc.reqq_dma[(_qno)]))
+#define BFA_MEM_RSPQ_DMA(_bfa, _qno)	(&((_bfa)->iocfc.rspq_dma[(_qno)]))
+#define BFA_MEM_IOCFC_KVA(_bfa)		(&((_bfa)->iocfc.kva_seg))
+
 #define bfa_fn_lpu(__bfa)	\
 	bfi_fn_lpu(bfa_ioc_pcifn(&(__bfa)->ioc), bfa_ioc_portid(&(__bfa)->ioc))
 #define bfa_msix_init(__bfa, __nvecs)					\
@@ -329,17 +312,17 @@ struct bfa_iocfc_s {
 /*
  * FC specific IOC functions.
  */
-void bfa_iocfc_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len,
-		       u32 *dm_len);
+void bfa_iocfc_meminfo(struct bfa_iocfc_cfg_s *cfg,
+			struct bfa_meminfo_s *meminfo,
+			struct bfa_s *bfa);
 void bfa_iocfc_attach(struct bfa_s *bfa, void *bfad,
 		      struct bfa_iocfc_cfg_s *cfg,
-		      struct bfa_meminfo_s *meminfo,
 		      struct bfa_pcidev_s *pcidev);
 void bfa_iocfc_init(struct bfa_s *bfa);
 void bfa_iocfc_start(struct bfa_s *bfa);
 void bfa_iocfc_stop(struct bfa_s *bfa);
 void bfa_iocfc_isr(void *bfa, struct bfi_mbmsg_s *msg);
-void bfa_iocfc_set_snsbase(struct bfa_s *bfa, u64 snsbase_pa);
+void bfa_iocfc_set_snsbase(struct bfa_s *bfa, int seg_no, u64 snsbase_pa);
 bfa_boolean_t bfa_iocfc_is_operational(struct bfa_s *bfa);
 void bfa_iocfc_reset_queues(struct bfa_s *bfa);
 
@@ -418,7 +401,8 @@ void bfa_get_pciids(struct bfa_pciid_s **pciids, int *npciids);
 void bfa_cfg_get_default(struct bfa_iocfc_cfg_s *cfg);
 void bfa_cfg_get_min(struct bfa_iocfc_cfg_s *cfg);
 void bfa_cfg_get_meminfo(struct bfa_iocfc_cfg_s *cfg,
-			 struct bfa_meminfo_s *meminfo);
+			struct bfa_meminfo_s *meminfo,
+			struct bfa_s *bfa);
 void bfa_attach(struct bfa_s *bfa, void *bfad, struct bfa_iocfc_cfg_s *cfg,
 		struct bfa_meminfo_s *meminfo,
 		struct bfa_pcidev_s *pcidev);
diff --git a/drivers/scsi/bfa/bfa_core.c b/drivers/scsi/bfa/bfa_core.c
index 0048fc8646b4..602dc3508ed8 100644
--- a/drivers/scsi/bfa/bfa_core.c
+++ b/drivers/scsi/bfa/bfa_core.c
@@ -89,46 +89,26 @@ static bfa_ioc_mbox_mcfunc_t  bfa_mbox_isrs[BFI_MC_MAX] = {
 
 
 static void
-bfa_com_port_attach(struct bfa_s *bfa, struct bfa_meminfo_s *mi)
+bfa_com_port_attach(struct bfa_s *bfa)
 {
 	struct bfa_port_s	*port = &bfa->modules.port;
-	u32			dm_len;
-	u8			*dm_kva;
-	u64			dm_pa;
+	struct bfa_mem_dma_s	*port_dma = BFA_MEM_PORT_DMA(bfa);
 
-	dm_len = bfa_port_meminfo();
-	dm_kva = bfa_meminfo_dma_virt(mi);
-	dm_pa  = bfa_meminfo_dma_phys(mi);
-
-	memset(port, 0, sizeof(struct bfa_port_s));
 	bfa_port_attach(port, &bfa->ioc, bfa, bfa->trcmod);
-	bfa_port_mem_claim(port, dm_kva, dm_pa);
-
-	bfa_meminfo_dma_virt(mi) = dm_kva + dm_len;
-	bfa_meminfo_dma_phys(mi) = dm_pa + dm_len;
+	bfa_port_mem_claim(port, port_dma->kva_curp, port_dma->dma_curp);
 }
 
 /*
  * ablk module attach
  */
 static void
-bfa_com_ablk_attach(struct bfa_s *bfa, struct bfa_meminfo_s *mi)
+bfa_com_ablk_attach(struct bfa_s *bfa)
 {
 	struct bfa_ablk_s	*ablk = &bfa->modules.ablk;
-	u32			dm_len;
-	u8			*dm_kva;
-	u64			dm_pa;
+	struct bfa_mem_dma_s	*ablk_dma = BFA_MEM_ABLK_DMA(bfa);
 
-	dm_len = bfa_ablk_meminfo();
-	dm_kva = bfa_meminfo_dma_virt(mi);
-	dm_pa  = bfa_meminfo_dma_phys(mi);
-
-	memset(ablk, 0, sizeof(struct bfa_ablk_s));
 	bfa_ablk_attach(ablk, &bfa->ioc);
-	bfa_ablk_memclaim(ablk, dm_kva, dm_pa);
-
-	bfa_meminfo_dma_virt(mi) = dm_kva + dm_len;
-	bfa_meminfo_dma_phys(mi) = dm_pa + dm_len;
+	bfa_ablk_memclaim(ablk, ablk_dma->kva_curp, ablk_dma->dma_curp);
 }
 
 /*
@@ -444,41 +424,6 @@ bfa_msix_lpu_err(struct bfa_s *bfa, int vec)
  *  BFA IOC private functions
  */
 
-static void
-bfa_iocfc_cqs_sz(struct bfa_iocfc_cfg_s *cfg, u32 *dm_len)
-{
-	int		i, per_reqq_sz, per_rspq_sz;
-
-	per_reqq_sz = BFA_ROUNDUP((cfg->drvcfg.num_reqq_elems * BFI_LMSG_SZ),
-				  BFA_DMA_ALIGN_SZ);
-	per_rspq_sz = BFA_ROUNDUP((cfg->drvcfg.num_rspq_elems * BFI_LMSG_SZ),
-				  BFA_DMA_ALIGN_SZ);
-
-	/*
-	 * Calculate CQ size
-	 */
-	for (i = 0; i < cfg->fwcfg.num_cqs; i++) {
-		*dm_len = *dm_len + per_reqq_sz;
-		*dm_len = *dm_len + per_rspq_sz;
-	}
-
-	/*
-	 * Calculate Shadow CI/PI size
-	 */
-	for (i = 0; i < cfg->fwcfg.num_cqs; i++)
-		*dm_len += (2 * BFA_CACHELINE_SZ);
-}
-
-static void
-bfa_iocfc_fw_cfg_sz(struct bfa_iocfc_cfg_s *cfg, u32 *dm_len)
-{
-	*dm_len +=
-		BFA_ROUNDUP(sizeof(struct bfi_iocfc_cfg_s), BFA_CACHELINE_SZ);
-	*dm_len +=
-		BFA_ROUNDUP(sizeof(struct bfi_iocfc_cfgrsp_s),
-			    BFA_CACHELINE_SZ);
-}
-
 /*
  * Use the Mailbox interface to send BFI_IOCFC_H2I_CFG_REQ
  */
@@ -604,48 +549,42 @@ bfa_iocfc_init_mem(struct bfa_s *bfa, void *bfad, struct bfa_iocfc_cfg_s *cfg,
 }
 
 static void
-bfa_iocfc_mem_claim(struct bfa_s *bfa, struct bfa_iocfc_cfg_s *cfg,
-		    struct bfa_meminfo_s *meminfo)
+bfa_iocfc_mem_claim(struct bfa_s *bfa, struct bfa_iocfc_cfg_s *cfg)
 {
-	u8	       *dm_kva;
-	u64	dm_pa;
-	int		i, per_reqq_sz, per_rspq_sz;
+	u8	*dm_kva = NULL;
+	u64	dm_pa = 0;
+	int	i, per_reqq_sz, per_rspq_sz, dbgsz;
 	struct bfa_iocfc_s  *iocfc = &bfa->iocfc;
-	int		dbgsz;
+	struct bfa_mem_dma_s *ioc_dma = BFA_MEM_IOC_DMA(bfa);
+	struct bfa_mem_dma_s *iocfc_dma = BFA_MEM_IOCFC_DMA(bfa);
+	struct bfa_mem_dma_s *reqq_dma, *rspq_dma;
 
-	dm_kva = bfa_meminfo_dma_virt(meminfo);
-	dm_pa = bfa_meminfo_dma_phys(meminfo);
+	/* First allocate dma memory for IOC */
+	bfa_ioc_mem_claim(&bfa->ioc, bfa_mem_dma_virt(ioc_dma),
+			bfa_mem_dma_phys(ioc_dma));
 
-	/*
-	 * First allocate dma memory for IOC.
-	 */
-	bfa_ioc_mem_claim(&bfa->ioc, dm_kva, dm_pa);
-	dm_kva += BFA_ROUNDUP(sizeof(struct bfi_ioc_attr_s), BFA_DMA_ALIGN_SZ);
-	dm_pa  += BFA_ROUNDUP(sizeof(struct bfi_ioc_attr_s), BFA_DMA_ALIGN_SZ);
-
-	/*
-	 * Claim DMA-able memory for the request/response queues and for shadow
-	 * ci/pi registers
-	 */
+	/* Claim DMA-able memory for the request/response queues */
 	per_reqq_sz = BFA_ROUNDUP((cfg->drvcfg.num_reqq_elems * BFI_LMSG_SZ),
-				  BFA_DMA_ALIGN_SZ);
+				BFA_DMA_ALIGN_SZ);
 	per_rspq_sz = BFA_ROUNDUP((cfg->drvcfg.num_rspq_elems * BFI_LMSG_SZ),
-				  BFA_DMA_ALIGN_SZ);
+				BFA_DMA_ALIGN_SZ);
 
 	for (i = 0; i < cfg->fwcfg.num_cqs; i++) {
-		iocfc->req_cq_ba[i].kva = dm_kva;
-		iocfc->req_cq_ba[i].pa = dm_pa;
-		memset(dm_kva, 0, per_reqq_sz);
-		dm_kva += per_reqq_sz;
-		dm_pa += per_reqq_sz;
-
-		iocfc->rsp_cq_ba[i].kva = dm_kva;
-		iocfc->rsp_cq_ba[i].pa = dm_pa;
-		memset(dm_kva, 0, per_rspq_sz);
-		dm_kva += per_rspq_sz;
-		dm_pa += per_rspq_sz;
+		reqq_dma = BFA_MEM_REQQ_DMA(bfa, i);
+		iocfc->req_cq_ba[i].kva = bfa_mem_dma_virt(reqq_dma);
+		iocfc->req_cq_ba[i].pa = bfa_mem_dma_phys(reqq_dma);
+		memset(iocfc->req_cq_ba[i].kva, 0, per_reqq_sz);
+
+		rspq_dma = BFA_MEM_RSPQ_DMA(bfa, i);
+		iocfc->rsp_cq_ba[i].kva = bfa_mem_dma_virt(rspq_dma);
+		iocfc->rsp_cq_ba[i].pa = bfa_mem_dma_phys(rspq_dma);
+		memset(iocfc->rsp_cq_ba[i].kva, 0, per_rspq_sz);
 	}
 
+	/* Claim IOCFC dma memory - for shadow CI/PI */
+	dm_kva = bfa_mem_dma_virt(iocfc_dma);
+	dm_pa  = bfa_mem_dma_phys(iocfc_dma);
+
 	for (i = 0; i < cfg->fwcfg.num_cqs; i++) {
 		iocfc->req_cq_shadow_ci[i].kva = dm_kva;
 		iocfc->req_cq_shadow_ci[i].pa = dm_pa;
@@ -658,36 +597,27 @@ bfa_iocfc_mem_claim(struct bfa_s *bfa, struct bfa_iocfc_cfg_s *cfg,
 		dm_pa += BFA_CACHELINE_SZ;
 	}
 
-	/*
-	 * Claim DMA-able memory for the config info page
-	 */
+	/* Claim IOCFC dma memory - for the config info page */
 	bfa->iocfc.cfg_info.kva = dm_kva;
 	bfa->iocfc.cfg_info.pa = dm_pa;
 	bfa->iocfc.cfginfo = (struct bfi_iocfc_cfg_s *) dm_kva;
 	dm_kva += BFA_ROUNDUP(sizeof(struct bfi_iocfc_cfg_s), BFA_CACHELINE_SZ);
 	dm_pa += BFA_ROUNDUP(sizeof(struct bfi_iocfc_cfg_s), BFA_CACHELINE_SZ);
 
-	/*
-	 * Claim DMA-able memory for the config response
-	 */
+	/* Claim IOCFC dma memory - for the config response */
 	bfa->iocfc.cfgrsp_dma.kva = dm_kva;
 	bfa->iocfc.cfgrsp_dma.pa = dm_pa;
 	bfa->iocfc.cfgrsp = (struct bfi_iocfc_cfgrsp_s *) dm_kva;
-
-	dm_kva +=
-		BFA_ROUNDUP(sizeof(struct bfi_iocfc_cfgrsp_s),
-			    BFA_CACHELINE_SZ);
+	dm_kva += BFA_ROUNDUP(sizeof(struct bfi_iocfc_cfgrsp_s),
+			BFA_CACHELINE_SZ);
 	dm_pa += BFA_ROUNDUP(sizeof(struct bfi_iocfc_cfgrsp_s),
-			     BFA_CACHELINE_SZ);
-
-
-	bfa_meminfo_dma_virt(meminfo) = dm_kva;
-	bfa_meminfo_dma_phys(meminfo) = dm_pa;
+			BFA_CACHELINE_SZ);
 
+	/* Claim IOCFC kva memory */
 	dbgsz = (bfa_auto_recover) ? BFA_DBG_FWTRC_LEN : 0;
 	if (dbgsz > 0) {
-		bfa_ioc_debug_memclaim(&bfa->ioc, bfa_meminfo_kva(meminfo));
-		bfa_meminfo_kva(meminfo) += dbgsz;
+		bfa_ioc_debug_memclaim(&bfa->ioc, bfa_mem_kva_curp(iocfc));
+		bfa_mem_kva_curp(iocfc) += dbgsz;
 	}
 }
 
@@ -1102,15 +1032,47 @@ bfa_iocfc_reset_cbfn(void *bfa_arg)
  * Query IOC memory requirement information.
  */
 void
-bfa_iocfc_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len,
-		  u32 *dm_len)
+bfa_iocfc_meminfo(struct bfa_iocfc_cfg_s *cfg, struct bfa_meminfo_s *meminfo,
+		  struct bfa_s *bfa)
 {
-	/* dma memory for IOC */
-	*dm_len += BFA_ROUNDUP(sizeof(struct bfi_ioc_attr_s), BFA_DMA_ALIGN_SZ);
+	int q, per_reqq_sz, per_rspq_sz;
+	struct bfa_mem_dma_s *ioc_dma = BFA_MEM_IOC_DMA(bfa);
+	struct bfa_mem_dma_s *iocfc_dma = BFA_MEM_IOCFC_DMA(bfa);
+	struct bfa_mem_kva_s *iocfc_kva = BFA_MEM_IOCFC_KVA(bfa);
+	u32	dm_len = 0;
+
+	/* dma memory setup for IOC */
+	bfa_mem_dma_setup(meminfo, ioc_dma,
+		BFA_ROUNDUP(sizeof(struct bfi_ioc_attr_s), BFA_DMA_ALIGN_SZ));
+
+	/* dma memory setup for REQ/RSP queues */
+	per_reqq_sz = BFA_ROUNDUP((cfg->drvcfg.num_reqq_elems * BFI_LMSG_SZ),
+				BFA_DMA_ALIGN_SZ);
+	per_rspq_sz = BFA_ROUNDUP((cfg->drvcfg.num_rspq_elems * BFI_LMSG_SZ),
+				BFA_DMA_ALIGN_SZ);
+
+	for (q = 0; q < cfg->fwcfg.num_cqs; q++) {
+		bfa_mem_dma_setup(meminfo, BFA_MEM_REQQ_DMA(bfa, q),
+				per_reqq_sz);
+		bfa_mem_dma_setup(meminfo, BFA_MEM_RSPQ_DMA(bfa, q),
+				per_rspq_sz);
+	}
 
-	bfa_iocfc_fw_cfg_sz(cfg, dm_len);
-	bfa_iocfc_cqs_sz(cfg, dm_len);
-	*km_len += (bfa_auto_recover) ? BFA_DBG_FWTRC_LEN : 0;
+	/* IOCFC dma memory - calculate Shadow CI/PI size */
+	for (q = 0; q < cfg->fwcfg.num_cqs; q++)
+		dm_len += (2 * BFA_CACHELINE_SZ);
+
+	/* IOCFC dma memory - calculate config info / rsp size */
+	dm_len += BFA_ROUNDUP(sizeof(struct bfi_iocfc_cfg_s), BFA_CACHELINE_SZ);
+	dm_len += BFA_ROUNDUP(sizeof(struct bfi_iocfc_cfgrsp_s),
+			BFA_CACHELINE_SZ);
+
+	/* dma memory setup for IOCFC */
+	bfa_mem_dma_setup(meminfo, iocfc_dma, dm_len);
+
+	/* kva memory setup for IOCFC */
+	bfa_mem_kva_setup(meminfo, iocfc_kva,
+			((bfa_auto_recover) ? BFA_DBG_FWTRC_LEN : 0));
 }
 
 /*
@@ -1118,7 +1080,7 @@ bfa_iocfc_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len,
  */
 void
 bfa_iocfc_attach(struct bfa_s *bfa, void *bfad, struct bfa_iocfc_cfg_s *cfg,
-		 struct bfa_meminfo_s *meminfo, struct bfa_pcidev_s *pcidev)
+		 struct bfa_pcidev_s *pcidev)
 {
 	int		i;
 	struct bfa_ioc_s *ioc = &bfa->ioc;
@@ -1135,7 +1097,7 @@ bfa_iocfc_attach(struct bfa_s *bfa, void *bfad, struct bfa_iocfc_cfg_s *cfg,
 	bfa_ioc_mbox_register(&bfa->ioc, bfa_mbox_isrs);
 
 	bfa_iocfc_init_mem(bfa, bfad, cfg, pcidev);
-	bfa_iocfc_mem_claim(bfa, cfg, meminfo);
+	bfa_iocfc_mem_claim(bfa, cfg);
 	INIT_LIST_HEAD(&bfa->timer_mod.timer_q);
 
 	INIT_LIST_HEAD(&bfa->comp_q);
@@ -1259,12 +1221,12 @@ bfa_iocfc_israttr_set(struct bfa_s *bfa, struct bfa_iocfc_intr_attr_s *attr)
 }
 
 void
-bfa_iocfc_set_snsbase(struct bfa_s *bfa, u64 snsbase_pa)
+bfa_iocfc_set_snsbase(struct bfa_s *bfa, int seg_no, u64 snsbase_pa)
 {
 	struct bfa_iocfc_s	*iocfc = &bfa->iocfc;
 
 	iocfc->cfginfo->sense_buf_len = (BFI_IOIM_SNSLEN - 1);
-	bfa_dma_be_addr_set(iocfc->cfginfo->ioim_snsbase, snsbase_pa);
+	bfa_dma_be_addr_set(iocfc->cfginfo->ioim_snsbase[seg_no], snsbase_pa);
 }
 /*
  * Enable IOC after it is disabled.
@@ -1353,34 +1315,37 @@ bfa_iocfc_get_pbc_vports(struct bfa_s *bfa, struct bfi_pbc_vport_s *pbc_vport)
  *			starting address for each block and provide the same
  *			structure as input parameter to bfa_attach() call.
  *
+ * @param[in] bfa -	pointer to the bfa structure, used while fetching the
+ *			dma, kva memory information of the bfa sub-modules.
+ *
  * @return void
  *
  * Special Considerations: @note
  */
 void
-bfa_cfg_get_meminfo(struct bfa_iocfc_cfg_s *cfg, struct bfa_meminfo_s *meminfo)
+bfa_cfg_get_meminfo(struct bfa_iocfc_cfg_s *cfg, struct bfa_meminfo_s *meminfo,
+		struct bfa_s *bfa)
 {
 	int		i;
-	u32	km_len = 0, dm_len = 0;
+	struct bfa_mem_dma_s *port_dma = BFA_MEM_PORT_DMA(bfa);
+	struct bfa_mem_dma_s *ablk_dma = BFA_MEM_ABLK_DMA(bfa);
 
 	WARN_ON((cfg == NULL) || (meminfo == NULL));
 
 	memset((void *)meminfo, 0, sizeof(struct bfa_meminfo_s));
-	meminfo->meminfo[BFA_MEM_TYPE_KVA - 1].mem_type =
-		BFA_MEM_TYPE_KVA;
-	meminfo->meminfo[BFA_MEM_TYPE_DMA - 1].mem_type =
-		BFA_MEM_TYPE_DMA;
 
-	bfa_iocfc_meminfo(cfg, &km_len, &dm_len);
+	/* Initialize the DMA & KVA meminfo queues */
+	INIT_LIST_HEAD(&meminfo->dma_info.qe);
+	INIT_LIST_HEAD(&meminfo->kva_info.qe);
 
-	for (i = 0; hal_mods[i]; i++)
-		hal_mods[i]->meminfo(cfg, &km_len, &dm_len);
+	bfa_iocfc_meminfo(cfg, meminfo, bfa);
 
-	dm_len += bfa_port_meminfo();
-	dm_len += bfa_ablk_meminfo();
+	for (i = 0; hal_mods[i]; i++)
+		hal_mods[i]->meminfo(cfg, meminfo, bfa);
 
-	meminfo->meminfo[BFA_MEM_TYPE_KVA - 1].mem_len = km_len;
-	meminfo->meminfo[BFA_MEM_TYPE_DMA - 1].mem_len = dm_len;
+	/* dma info setup */
+	bfa_mem_dma_setup(meminfo, port_dma, bfa_port_meminfo());
+	bfa_mem_dma_setup(meminfo, ablk_dma, bfa_ablk_meminfo());
 }
 
 /*
@@ -1413,29 +1378,41 @@ void
 bfa_attach(struct bfa_s *bfa, void *bfad, struct bfa_iocfc_cfg_s *cfg,
 	       struct bfa_meminfo_s *meminfo, struct bfa_pcidev_s *pcidev)
 {
-	int			i;
-	struct bfa_mem_elem_s	*melem;
+	int	i;
+	struct bfa_mem_dma_s *dma_info, *dma_elem;
+	struct bfa_mem_kva_s *kva_info, *kva_elem;
+	struct list_head *dm_qe, *km_qe;
 
 	bfa->fcs = BFA_FALSE;
 
 	WARN_ON((cfg == NULL) || (meminfo == NULL));
 
-	/*
-	 * initialize all memory pointers for iterative allocation
-	 */
-	for (i = 0; i < BFA_MEM_TYPE_MAX; i++) {
-		melem = meminfo->meminfo + i;
-		melem->kva_curp = melem->kva;
-		melem->dma_curp = melem->dma;
+	/* Initialize memory pointers for iterative allocation */
+	dma_info = &meminfo->dma_info;
+	dma_info->kva_curp = dma_info->kva;
+	dma_info->dma_curp = dma_info->dma;
+
+	kva_info = &meminfo->kva_info;
+	kva_info->kva_curp = kva_info->kva;
+
+	list_for_each(dm_qe, &dma_info->qe) {
+		dma_elem = (struct bfa_mem_dma_s *) dm_qe;
+		dma_elem->kva_curp = dma_elem->kva;
+		dma_elem->dma_curp = dma_elem->dma;
+	}
+
+	list_for_each(km_qe, &kva_info->qe) {
+		kva_elem = (struct bfa_mem_kva_s *) km_qe;
+		kva_elem->kva_curp = kva_elem->kva;
 	}
 
-	bfa_iocfc_attach(bfa, bfad, cfg, meminfo, pcidev);
+	bfa_iocfc_attach(bfa, bfad, cfg, pcidev);
 
 	for (i = 0; hal_mods[i]; i++)
-		hal_mods[i]->attach(bfa, bfad, cfg, meminfo, pcidev);
+		hal_mods[i]->attach(bfa, bfad, cfg, pcidev);
 
-	bfa_com_port_attach(bfa, meminfo);
-	bfa_com_ablk_attach(bfa, meminfo);
+	bfa_com_port_attach(bfa);
+	bfa_com_ablk_attach(bfa);
 }
 
 /*
diff --git a/drivers/scsi/bfa/bfa_fcpim.c b/drivers/scsi/bfa/bfa_fcpim.c
index eb14fd6193a0..27eab36f89a5 100644
--- a/drivers/scsi/bfa/bfa_fcpim.c
+++ b/drivers/scsi/bfa/bfa_fcpim.c
@@ -286,10 +286,9 @@ static void     bfa_tskim_sm_hcb(struct bfa_tskim_s *tskim,
  * Compute and return memory needed by FCP(im) module.
  */
 static void
-bfa_fcpim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len,
-		u32 *dm_len)
+bfa_fcpim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len)
 {
-	bfa_itnim_meminfo(cfg, km_len, dm_len);
+	bfa_itnim_meminfo(cfg, km_len);
 
 	/*
 	 * IO memory
@@ -308,8 +307,7 @@ bfa_fcpim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len,
 
 static void
 bfa_fcpim_attach(struct bfa_fcp_mod_s *fcp, void *bfad,
-		struct bfa_iocfc_cfg_s *cfg, struct bfa_meminfo_s *meminfo,
-		struct bfa_pcidev_s *pcidev)
+		struct bfa_iocfc_cfg_s *cfg, struct bfa_pcidev_s *pcidev)
 {
 	struct bfa_fcpim_s *fcpim = &fcp->fcpim;
 	struct bfa_s *bfa = fcp->bfa;
@@ -328,9 +326,9 @@ bfa_fcpim_attach(struct bfa_fcp_mod_s *fcp, void *bfad,
 	fcpim->profile_comp = NULL;
 	fcpim->profile_start = NULL;
 
-	bfa_itnim_attach(fcpim, meminfo);
-	bfa_tskim_attach(fcpim, meminfo);
-	bfa_ioim_attach(fcpim, meminfo);
+	bfa_itnim_attach(fcpim);
+	bfa_tskim_attach(fcpim);
+	bfa_ioim_attach(fcpim);
 }
 
 static void
@@ -972,8 +970,7 @@ bfa_itnim_tskdone(struct bfa_itnim_s *itnim)
 }
 
 void
-bfa_itnim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len,
-		u32 *dm_len)
+bfa_itnim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len)
 {
 	/*
 	 * ITN memory
@@ -982,15 +979,16 @@ bfa_itnim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len,
 }
 
 void
-bfa_itnim_attach(struct bfa_fcpim_s *fcpim, struct bfa_meminfo_s *minfo)
+bfa_itnim_attach(struct bfa_fcpim_s *fcpim)
 {
 	struct bfa_s	*bfa = fcpim->bfa;
+	struct bfa_fcp_mod_s	*fcp = fcpim->fcp;
 	struct bfa_itnim_s *itnim;
 	int	i, j;
 
 	INIT_LIST_HEAD(&fcpim->itnim_q);
 
-	itnim = (struct bfa_itnim_s *) bfa_meminfo_kva(minfo);
+	itnim = (struct bfa_itnim_s *) bfa_mem_kva_curp(fcp);
 	fcpim->itnim_arr = itnim;
 
 	for (i = 0; i < fcpim->num_itnims; i++, itnim++) {
@@ -1012,7 +1010,7 @@ bfa_itnim_attach(struct bfa_fcpim_s *fcpim, struct bfa_meminfo_s *minfo)
 		bfa_sm_set_state(itnim, bfa_itnim_sm_uninit);
 	}
 
-	bfa_meminfo_kva(minfo) = (u8 *) itnim;
+	bfa_mem_kva_curp(fcp) = (u8 *) itnim;
 }
 
 void
@@ -2345,22 +2343,23 @@ bfa_ioim_delayed_comp(struct bfa_ioim_s *ioim, bfa_boolean_t iotov)
  * Memory allocation and initialization.
  */
 void
-bfa_ioim_attach(struct bfa_fcpim_s *fcpim, struct bfa_meminfo_s *minfo)
+bfa_ioim_attach(struct bfa_fcpim_s *fcpim)
 {
 	struct bfa_ioim_s		*ioim;
+	struct bfa_fcp_mod_s	*fcp = fcpim->fcp;
 	struct bfa_ioim_sp_s	*iosp;
 	u16		i;
 
 	/*
 	 * claim memory first
 	 */
-	ioim = (struct bfa_ioim_s *) bfa_meminfo_kva(minfo);
+	ioim = (struct bfa_ioim_s *) bfa_mem_kva_curp(fcp);
 	fcpim->ioim_arr = ioim;
-	bfa_meminfo_kva(minfo) = (u8 *) (ioim + fcpim->fcp->num_ioim_reqs);
+	bfa_mem_kva_curp(fcp) = (u8 *) (ioim + fcpim->fcp->num_ioim_reqs);
 
-	iosp = (struct bfa_ioim_sp_s *) bfa_meminfo_kva(minfo);
+	iosp = (struct bfa_ioim_sp_s *) bfa_mem_kva_curp(fcp);
 	fcpim->ioim_sp_arr = iosp;
-	bfa_meminfo_kva(minfo) = (u8 *) (iosp + fcpim->fcp->num_ioim_reqs);
+	bfa_mem_kva_curp(fcp) = (u8 *) (iosp + fcpim->fcp->num_ioim_reqs);
 
 	/*
 	 * Initialize ioim free queues
@@ -3109,15 +3108,16 @@ bfa_tskim_cleanup(struct bfa_tskim_s *tskim)
  * Memory allocation and initialization.
  */
 void
-bfa_tskim_attach(struct bfa_fcpim_s *fcpim, struct bfa_meminfo_s *minfo)
+bfa_tskim_attach(struct bfa_fcpim_s *fcpim)
 {
 	struct bfa_tskim_s *tskim;
+	struct bfa_fcp_mod_s	*fcp = fcpim->fcp;
 	u16	i;
 
 	INIT_LIST_HEAD(&fcpim->tskim_free_q);
 	INIT_LIST_HEAD(&fcpim->tskim_unused_q);
 
-	tskim = (struct bfa_tskim_s *) bfa_meminfo_kva(minfo);
+	tskim = (struct bfa_tskim_s *) bfa_mem_kva_curp(fcp);
 	fcpim->tskim_arr = tskim;
 
 	for (i = 0; i < fcpim->num_tskim_reqs; i++, tskim++) {
@@ -3136,7 +3136,7 @@ bfa_tskim_attach(struct bfa_fcpim_s *fcpim, struct bfa_meminfo_s *minfo)
 		list_add_tail(&tskim->qe, &fcpim->tskim_free_q);
 	}
 
-	bfa_meminfo_kva(minfo) = (u8 *) tskim;
+	bfa_mem_kva_curp(fcp) = (u8 *) tskim;
 }
 
 void
@@ -3233,9 +3233,14 @@ bfa_tskim_res_recfg(struct bfa_s *bfa, u16 num_tskim_fw)
 BFA_MODULE(fcp);
 
 static void
-bfa_fcp_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len, u32 *dm_len)
+bfa_fcp_meminfo(struct bfa_iocfc_cfg_s *cfg, struct bfa_meminfo_s *minfo,
+		struct bfa_s *bfa)
 {
-	u16	num_io_req;
+	struct bfa_fcp_mod_s *fcp = BFA_FCP_MOD(bfa);
+	struct bfa_mem_kva_s *fcp_kva = BFA_MEM_FCP_KVA(bfa);
+	struct bfa_mem_dma_s *seg_ptr;
+	u16	nsegs, idx, per_seg_ios, num_io_req;
+	u32	km_len = 0;
 
 	/*
 	 * ZERO for num_ioim_reqs and num_fwtio_reqs is allowed config value.
@@ -3261,43 +3266,69 @@ bfa_fcp_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len, u32 *dm_len)
 			cfg->fwcfg.num_ioim_reqs = BFA_IOIM_MAX;
 	}
 
-	bfa_fcpim_meminfo(cfg, km_len, dm_len);
+	bfa_fcpim_meminfo(cfg, &km_len);
 
 	num_io_req = (cfg->fwcfg.num_ioim_reqs + cfg->fwcfg.num_fwtio_reqs);
-	*km_len += num_io_req * sizeof(struct bfa_iotag_s);
-	*km_len += cfg->fwcfg.num_rports * sizeof(struct bfa_itn_s);
-	*dm_len += num_io_req * BFI_IOIM_SNSLEN;
+	km_len += num_io_req * sizeof(struct bfa_iotag_s);
+	km_len += cfg->fwcfg.num_rports * sizeof(struct bfa_itn_s);
+
+	/* dma memory */
+	nsegs = BFI_MEM_DMA_NSEGS(num_io_req, BFI_IOIM_SNSLEN);
+	per_seg_ios = BFI_MEM_NREQS_SEG(BFI_IOIM_SNSLEN);
+
+	bfa_mem_dma_seg_iter(fcp, seg_ptr, nsegs, idx) {
+		if (num_io_req >= per_seg_ios) {
+			num_io_req -= per_seg_ios;
+			bfa_mem_dma_setup(minfo, seg_ptr,
+				per_seg_ios * BFI_IOIM_SNSLEN);
+		} else
+			bfa_mem_dma_setup(minfo, seg_ptr,
+				num_io_req * BFI_IOIM_SNSLEN);
+	}
+
+	/* kva memory */
+	bfa_mem_kva_setup(minfo, fcp_kva, km_len);
 }
 
 static void
 bfa_fcp_attach(struct bfa_s *bfa, void *bfad, struct bfa_iocfc_cfg_s *cfg,
-		struct bfa_meminfo_s *meminfo, struct bfa_pcidev_s *pcidev)
+		struct bfa_pcidev_s *pcidev)
 {
 	struct bfa_fcp_mod_s *fcp = BFA_FCP_MOD(bfa);
-	u32	snsbufsz;
+	struct bfa_mem_dma_s *seg_ptr;
+	u16	idx, nsegs, num_io_req;
 
 	fcp->num_ioim_reqs = cfg->fwcfg.num_ioim_reqs;
 	fcp->num_fwtio_reqs  = cfg->fwcfg.num_fwtio_reqs;
-	fcp->num_itns	= cfg->fwcfg.num_rports;
+	fcp->num_itns   = cfg->fwcfg.num_rports;
 	fcp->bfa = bfa;
 
-	snsbufsz = (fcp->num_ioim_reqs + fcp->num_fwtio_reqs) * BFI_IOIM_SNSLEN;
-	fcp->snsbase.pa = bfa_meminfo_dma_phys(meminfo);
-	bfa_meminfo_dma_phys(meminfo) += snsbufsz;
+	/*
+	 * Setup the pool of snsbase addr's, that is passed to fw as
+	 * part of bfi_iocfc_cfg_s.
+	 */
+	num_io_req = (cfg->fwcfg.num_ioim_reqs + cfg->fwcfg.num_fwtio_reqs);
+	nsegs = BFI_MEM_DMA_NSEGS(num_io_req, BFI_IOIM_SNSLEN);
+
+	bfa_mem_dma_seg_iter(fcp, seg_ptr, nsegs, idx) {
+
+		if (!bfa_mem_dma_virt(seg_ptr))
+			break;
+
+		fcp->snsbase[idx].pa = bfa_mem_dma_phys(seg_ptr);
+		fcp->snsbase[idx].kva = bfa_mem_dma_virt(seg_ptr);
+		bfa_iocfc_set_snsbase(bfa, idx, fcp->snsbase[idx].pa);
+	}
 
-	fcp->snsbase.kva = bfa_meminfo_dma_virt(meminfo);
-	bfa_meminfo_dma_virt(meminfo) += snsbufsz;
-	bfa_iocfc_set_snsbase(bfa, fcp->snsbase.pa);
+	bfa_fcpim_attach(fcp, bfad, cfg, pcidev);
 
-	bfa_fcpim_attach(fcp, bfad, cfg, meminfo, pcidev);
+	bfa_iotag_attach(fcp);
 
-	fcp->itn_arr = (struct bfa_itn_s *) bfa_meminfo_kva(meminfo);
-	bfa_meminfo_kva(meminfo) = (u8 *)fcp->itn_arr +
+	fcp->itn_arr = (struct bfa_itn_s *) bfa_mem_kva_curp(fcp);
+	bfa_mem_kva_curp(fcp) = (u8 *)fcp->itn_arr +
 			(fcp->num_itns * sizeof(struct bfa_itn_s));
 	memset(fcp->itn_arr, 0,
 			(fcp->num_itns * sizeof(struct bfa_itn_s)));
-
-	bfa_iotag_attach(fcp, meminfo);
 }
 
 static void
@@ -3370,12 +3401,12 @@ bfa_itn_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
 }
 
 void
-bfa_iotag_attach(struct bfa_fcp_mod_s *fcp, struct bfa_meminfo_s *minfo)
+bfa_iotag_attach(struct bfa_fcp_mod_s *fcp)
 {
 	struct bfa_iotag_s *iotag;
 	u16	num_io_req, i;
 
-	iotag = (struct bfa_iotag_s *) bfa_meminfo_kva(minfo);
+	iotag = (struct bfa_iotag_s *) bfa_mem_kva_curp(fcp);
 	fcp->iotag_arr = iotag;
 
 	INIT_LIST_HEAD(&fcp->iotag_ioim_free_q);
@@ -3392,5 +3423,5 @@ bfa_iotag_attach(struct bfa_fcp_mod_s *fcp, struct bfa_meminfo_s *minfo)
 			list_add_tail(&iotag->qe, &fcp->iotag_tio_free_q);
 	}
 
-	bfa_meminfo_kva(minfo) = (u8 *) iotag;
+	bfa_mem_kva_curp(fcp) = (u8 *) iotag;
 }
diff --git a/drivers/scsi/bfa/bfa_fcpim.h b/drivers/scsi/bfa/bfa_fcpim.h
index bc6b294426ec..ccb7c6ebebf9 100644
--- a/drivers/scsi/bfa/bfa_fcpim.h
+++ b/drivers/scsi/bfa/bfa_fcpim.h
@@ -25,8 +25,8 @@
 #include "bfa_cs.h"
 
 /* FCP module related definitions */
-#define BFA_IO_MAX	2000
-#define BFA_FWTIO_MAX	0
+#define BFA_IO_MAX	BFI_IO_MAX
+#define BFA_FWTIO_MAX	2000
 
 struct bfa_fcp_mod_s;
 struct bfa_iotag_s {
@@ -41,16 +41,17 @@ struct bfa_itn_s {
 void bfa_itn_create(struct bfa_s *bfa, struct bfa_rport_s *rport,
 		void (*isr)(struct bfa_s *bfa, struct bfi_msg_s *m));
 void bfa_itn_isr(struct bfa_s *bfa, struct bfi_msg_s *m);
-void bfa_iotag_attach(struct bfa_fcp_mod_s *fcp, struct bfa_meminfo_s *minfo);
+void bfa_iotag_attach(struct bfa_fcp_mod_s *fcp);
 void bfa_fcp_res_recfg(struct bfa_s *bfa, u16 num_ioim_fw);
 
 #define BFA_FCP_MOD(_hal)	(&(_hal)->modules.fcp_mod)
+#define BFA_MEM_FCP_KVA(__bfa)	(&(BFA_FCP_MOD(__bfa)->kva_seg))
 #define BFA_IOTAG_FROM_TAG(_fcp, _tag)	\
 	(&(_fcp)->iotag_arr[(_tag & BFA_IOIM_IOTAG_MASK)])
 #define BFA_ITN_FROM_TAG(_fcp, _tag)	\
 	((_fcp)->itn_arr + ((_tag) & ((_fcp)->num_itns - 1)))
 #define BFA_SNSINFO_FROM_TAG(_fcp, _tag) \
-	(((u8 *)(_fcp)->snsbase.kva) + (_tag * BFI_IOIM_SNSLEN))
+	bfa_mem_get_dmabuf_kva(_fcp, _tag, BFI_IOIM_SNSLEN)
 
 #define BFA_ITNIM_MIN   32
 #define BFA_ITNIM_MAX   1024
@@ -130,6 +131,9 @@ struct bfa_fcpim_s {
 	bfa_fcpim_profile_t     profile_start;
 };
 
+/* Max FCP dma segs required */
+#define BFA_FCP_DMA_SEGS	BFI_IOIM_SNSBUF_SEGS
+
 struct bfa_fcp_mod_s {
 	struct bfa_s		*bfa;
 	struct list_head	iotag_ioim_free_q;	/* free IO resources */
@@ -140,8 +144,10 @@ struct bfa_fcp_mod_s {
 	int			num_ioim_reqs;
 	int			num_fwtio_reqs;
 	int			num_itns;
-	struct bfa_dma_s	snsbase;
+	struct bfa_dma_s	snsbase[BFA_FCP_DMA_SEGS];
 	struct bfa_fcpim_s	fcpim;
+	struct bfa_mem_dma_s	dma_seg[BFA_FCP_DMA_SEGS];
+	struct bfa_mem_kva_s	kva_seg;
 };
 
 /*
@@ -256,8 +262,7 @@ bfa_ioim_maxretry_reached(struct bfa_ioim_s *ioim)
 /*
  * function prototypes
  */
-void	bfa_ioim_attach(struct bfa_fcpim_s *fcpim,
-					struct bfa_meminfo_s *minfo);
+void	bfa_ioim_attach(struct bfa_fcpim_s *fcpim);
 void	bfa_ioim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
 void	bfa_ioim_good_comp_isr(struct bfa_s *bfa,
 					struct bfi_msg_s *msg);
@@ -267,18 +272,15 @@ void	bfa_ioim_cleanup_tm(struct bfa_ioim_s *ioim,
 void	bfa_ioim_iocdisable(struct bfa_ioim_s *ioim);
 void	bfa_ioim_tov(struct bfa_ioim_s *ioim);
 
-void	bfa_tskim_attach(struct bfa_fcpim_s *fcpim,
-					struct bfa_meminfo_s *minfo);
+void	bfa_tskim_attach(struct bfa_fcpim_s *fcpim);
 void	bfa_tskim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
 void	bfa_tskim_iodone(struct bfa_tskim_s *tskim);
 void	bfa_tskim_iocdisable(struct bfa_tskim_s *tskim);
 void	bfa_tskim_cleanup(struct bfa_tskim_s *tskim);
 void	bfa_tskim_res_recfg(struct bfa_s *bfa, u16 num_tskim_fw);
 
-void	bfa_itnim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len,
-					u32 *dm_len);
-void	bfa_itnim_attach(struct bfa_fcpim_s *fcpim,
-					struct bfa_meminfo_s *minfo);
+void	bfa_itnim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len);
+void	bfa_itnim_attach(struct bfa_fcpim_s *fcpim);
 void	bfa_itnim_iocdisable(struct bfa_itnim_s *itnim);
 void	bfa_itnim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
 void	bfa_itnim_iodone(struct bfa_itnim_s *itnim);
diff --git a/drivers/scsi/bfa/bfa_ioc.h b/drivers/scsi/bfa/bfa_ioc.h
index 1055ca9f6043..83c3f2fc3411 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)
diff --git a/drivers/scsi/bfa/bfa_modules.h b/drivers/scsi/bfa/bfa_modules.h
index 7311169089a9..e27fde8c6f2f 100644
--- a/