diff mbox

[dpdk-dev,09/16] nfp: add support for vNIC rx/tx bar mappings

Message ID 1503591622-16232-10-git-send-email-alejandro.lucero@netronome.com (mailing list archive)
State Changes Requested, archived
Delegated to: Ferruh Yigit
Headers

Checks

Context Check Description
ci/Intel-compilation success Compilation OK
ci/checkpatch success coding style OK

Commit Message

Alejandro Lucero Aug. 24, 2017, 4:20 p.m. UTC 
  NFP vNICs use a subset of PCI device BARs. vNIC rx/tx bars point to
NFP hardware queues unit. Unline vNIC config bar, the NFP address is
always the same so the NFP expansion bar configuration always uses
the same hardcoded physical address.

This patch adds a NSPU API function for getting vNIC rx/tx bars
mapped through a expansion bar using that specific physical address.

The PMD will use the PCI bar offset returned for mapping the vNIC
rx/tx bars.

Signed-off-by: Alejandro Lucero <alejandro.lucero@netronome.com>
---
 drivers/net/nfp/nfp_nspu.c | 21 ++++++++++++++++++++-
 drivers/net/nfp/nfp_nspu.h |  1 +
 2 files changed, 21 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/drivers/net/nfp/nfp_nspu.c b/drivers/net/nfp/nfp_nspu.c
index f68bae6..df5af33 100644
--- a/drivers/net/nfp/nfp_nspu.c
+++ b/drivers/net/nfp/nfp_nspu.c
@@ -22,7 +22,8 @@ 
 #define NFP_NSP_TARGET   7
 
 /* Expansion BARs for mapping PF vnic BARs */
-#define NFP_NET_PF_CFG_EXP_BAR    6
+#define NFP_NET_PF_CFG_EXP_BAR          6
+#define NFP_NET_PF_HW_QUEUES_EXP_BAR    5
 
 /*
  * This is an NFP internal address used for configuring properly an NFP
@@ -509,3 +510,21 @@ 
 
 	return 0;
 }
+
+/*
+ * This is a hardcoded fixed NFP internal CPP bus address for the hw queues unit
+ * inside the PCIE island.
+ */
+#define NFP_CPP_PCIE_QUEUES ((uint64_t)(1ULL << 39) |  0x80000 | \
+			     ((uint64_t)0x4 & 0x3f) << 32)
+
+/* Configure a specific NFP expansion bar for accessing the vNIC rx/tx BARs */
+void
+nfp_nsp_map_queues_bar(nspu_desc_t *desc, uint64_t *pcie_offset)
+{
+	nfp_nspu_mem_bar_cfg(desc, NFP_NET_PF_HW_QUEUES_EXP_BAR, 0,
+			     NFP_CPP_PCIE_QUEUES, pcie_offset);
+
+	/* This is the pcie offset to use by the host */
+	*pcie_offset |= ((NFP_NET_PF_HW_QUEUES_EXP_BAR & 0x7) << (27 - 3));
+}
diff --git a/drivers/net/nfp/nfp_nspu.h b/drivers/net/nfp/nfp_nspu.h
index 8211f92..4b09d4f 100644
--- a/drivers/net/nfp/nfp_nspu.h
+++ b/drivers/net/nfp/nfp_nspu.h
@@ -74,3 +74,4 @@  int nfp_nspu_init(nspu_desc_t *desc, int nfp, int pcie_bar, size_t pcie_barsz,
 int nfp_nsp_get_abi_version(nspu_desc_t *desc, int *major, int *minor);
 int nfp_nsp_fw_setup(nspu_desc_t *desc, const char *sym, uint64_t *pcie_offset);
 int nfp_nsp_map_ctrl_bar(nspu_desc_t *desc, uint64_t *pcie_offset);
+void nfp_nsp_map_queues_bar(nspu_desc_t *desc, uint64_t *pcie_offset);