[dpdk-dev] [PATCH 28/32] net/dpaa2: add support for physical address usages

[Hemant Agrawal]

DPAA2 HW accelerators with ARM SMMU can be configured
to use virtual or physical address from users space.
Adding support for Physical address (default).

Signed-off-by: Hemant Agrawal <hemant.agrawal at nxp.com>
---
 config/defconfig_arm64-dpaa2-linuxapp-gcc |  1 +
 drivers/net/dpaa2/Makefile                |  1 +
 drivers/net/dpaa2/base/dpaa2_hw_dpbp.c    |  1 +
 drivers/net/dpaa2/base/dpaa2_hw_pvt.h     | 59 +++++++++++++++++++++++++++++++
 4 files changed, 62 insertions(+)

diff --git a/config/defconfig_arm64-dpaa2-linuxapp-gcc b/config/defconfig_arm64-dpaa2-linuxapp-gcc
index bcb6e88..7dc6d2d 100644
--- a/config/defconfig_arm64-dpaa2-linuxapp-gcc
+++ b/config/defconfig_arm64-dpaa2-linuxapp-gcc
@@ -50,5 +50,6 @@ CONFIG_RTE_MBUF_DEFAULT_MEMPOOL_OPS="dpaa2"
 # Compile software PMD backed by NXP DPAA2 files
 #
 CONFIG_RTE_LIBRTE_DPAA2_PMD=y
+CONFIG_RTE_LIBRTE_DPAA2_USE_PHYS_IOVA=y
 CONFIG_RTE_LIBRTE_DPAA2_DEBUG_INIT=n
 CONFIG_RTE_LIBRTE_DPAA2_DEBUG_DRIVER=n
diff --git a/drivers/net/dpaa2/Makefile b/drivers/net/dpaa2/Makefile
index 9e693cd..a8c3c04 100644
--- a/drivers/net/dpaa2/Makefile
+++ b/drivers/net/dpaa2/Makefile
@@ -42,6 +42,7 @@ else
 CFLAGS += -O3
 CFLAGS += $(WERROR_FLAGS)
 endif
+CFLAGS +=-Wno-unused-function
 
 CFLAGS += -I$(RTE_SDK)/drivers/net/dpaa2
 CFLAGS += -I$(RTE_SDK)/drivers/common/dpaa2/mc
diff --git a/drivers/net/dpaa2/base/dpaa2_hw_dpbp.c b/drivers/net/dpaa2/base/dpaa2_hw_dpbp.c
index 2b30036..5b7d593 100644
--- a/drivers/net/dpaa2/base/dpaa2_hw_dpbp.c
+++ b/drivers/net/dpaa2/base/dpaa2_hw_dpbp.c
@@ -322,6 +322,7 @@ int hw_mbuf_alloc_bulk(struct rte_mempool *pool,
 			 * i.e. first buffer is valid,
 			 * remaining 6 buffers may be null
 			 */
+			DPAA2_MODIFY_IOVA_TO_VADDR(bufs[i], uint64_t);
 			obj_table[n] = (struct rte_mbuf *)(bufs[i] - mbuf_size);
 			rte_mbuf_refcnt_set((struct rte_mbuf *)obj_table[n], 0);
 			PMD_TX_LOG(DEBUG, "Acquired %p address %p from BMAN",
diff --git a/drivers/net/dpaa2/base/dpaa2_hw_pvt.h b/drivers/net/dpaa2/base/dpaa2_hw_pvt.h
index d116fcd..a1afa23 100644
--- a/drivers/net/dpaa2/base/dpaa2_hw_pvt.h
+++ b/drivers/net/dpaa2/base/dpaa2_hw_pvt.h
@@ -169,8 +169,67 @@ struct qbman_fle {
  */
 #define DPAA2_EQ_RESP_ALWAYS		1
 
+#ifdef RTE_LIBRTE_DPAA2_USE_PHYS_IOVA
+/* todo - this is costly, need to write a fast coversion routine */
+static void *dpaa2_mem_ptov(phys_addr_t paddr)
+{
+	const struct rte_memseg *memseg = rte_eal_get_physmem_layout();
+	int i;
+
+	for (i = 0; i < RTE_MAX_MEMSEG && memseg[i].addr_64 != 0; i++) {
+		if (paddr >= memseg[i].phys_addr &&
+		   (char *)paddr < (char *)memseg[i].phys_addr + memseg[i].len)
+			return (void *)(memseg[i].addr_64
+				+ (paddr - memseg[i].phys_addr));
+	}
+	return NULL;
+}
+
+static phys_addr_t dpaa2_mem_vtop(uint64_t vaddr)
+{
+	const struct rte_memseg *memseg = rte_eal_get_physmem_layout();
+	int i;
+
+	for (i = 0; i < RTE_MAX_MEMSEG && memseg[i].addr_64 != 0; i++) {
+		if (vaddr >= memseg[i].addr_64 &&
+		    vaddr < memseg[i].addr_64 + memseg[i].len)
+			return memseg[i].phys_addr
+				+ (vaddr - memseg[i].addr_64);
+	}
+	return (phys_addr_t)(NULL);
+}
+
+/**
+ * When we are using Physical addresses as IO Virtual Addresses,
+ * Need to call conversion routines dpaa2_mem_vtop & dpaa2_mem_ptov
+ * whereever required.
+ * These routines are called with help of below MACRO's
+ */
+
+#define DPAA2_MBUF_VADDR_TO_IOVA(mbuf) (mbuf->buf_physaddr)
+
+/**
+ * macro to convert Virtual address to IOVA
+ */
+#define DPAA2_VADDR_TO_IOVA(_vaddr) dpaa2_mem_vtop((uint64_t)(_vaddr))
+
+/**
+ * macro to convert IOVA to Virtual address
+ */
+#define DPAA2_IOVA_TO_VADDR(_iova) dpaa2_mem_ptov((phys_addr_t)(_iova))
+
+/**
+ * macro to convert modify the memory containing IOVA to Virtual address
+ */
+#define DPAA2_MODIFY_IOVA_TO_VADDR(_mem, _type) \
+	{_mem = (_type)(dpaa2_mem_ptov((phys_addr_t)(_mem))); }
+
+#else	/* RTE_LIBRTE_DPAA2_USE_PHYS_IOVA */
+
 #define DPAA2_MBUF_VADDR_TO_IOVA(mbuf) (mbuf->buf_addr)
 #define DPAA2_VADDR_TO_IOVA(_vaddr) (_vaddr)
 #define DPAA2_IOVA_TO_VADDR(_iova) (_iova)
+#define DPAA2_MODIFY_IOVA_TO_VADDR(_mem, _type)
 
+#endif /* RTE_LIBRTE_DPAA2_USE_PHYS_IOVA */
 #endif
-- 
1.9.1