[dpdk-dev] [PATCH v2] net/octeontx2: add cn98xx support

[Harman Kalra <hkalra@marvell.com>]

New cn98xx SOC comes up with two NIX blocks wrt
cn96xx, cn93xx, to achieve higher performance.
Also the no of cores increased to 36 from 24.

Adding support for cn98xx where need a logic to
detect if the LF is attached to NIX0 or NIX1 and
then accordingly use the respective NIX block.

Signed-off-by: Harman Kalra <hkalra@marvell.com>
---
*V2: updated make/meson configs with the increased no of
cores.

 config/arm/meson.build                        |  2 +-
 config/defconfig_arm64-octeontx2-linuxapp-gcc |  2 +-
 doc/guides/platform/octeontx2.rst             |  1 +
 drivers/common/octeontx2/hw/otx2_rvu.h        |  3 ++-
 drivers/net/octeontx2/otx2_ethdev.c           | 17 ++++++++++++++++-
 5 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/config/arm/meson.build b/config/arm/meson.build
index 6e75e6d97..8728051d5 100644
--- a/config/arm/meson.build
+++ b/config/arm/meson.build
@@ -82,7 +82,7 @@ flags_thunderx2_extra = [
 flags_octeontx2_extra = [
 	['RTE_MACHINE', '"octeontx2"'],
 	['RTE_MAX_NUMA_NODES', 1],
-	['RTE_MAX_LCORE', 24],
+	['RTE_MAX_LCORE', 36],
 	['RTE_ARM_FEATURE_ATOMICS', true],
 	['RTE_EAL_IGB_UIO', false],
 	['RTE_USE_C11_MEM_MODEL', true]]
diff --git a/config/defconfig_arm64-octeontx2-linuxapp-gcc b/config/defconfig_arm64-octeontx2-linuxapp-gcc
index 7cfb81872..0d83becf5 100644
--- a/config/defconfig_arm64-octeontx2-linuxapp-gcc
+++ b/config/defconfig_arm64-octeontx2-linuxapp-gcc
@@ -7,7 +7,7 @@
 CONFIG_RTE_MACHINE="octeontx2"
 
 CONFIG_RTE_MAX_NUMA_NODES=1
-CONFIG_RTE_MAX_LCORE=24
+CONFIG_RTE_MAX_LCORE=36
 CONFIG_RTE_ARM_FEATURE_ATOMICS=y
 
 # Doesn't support NUMA
diff --git a/doc/guides/platform/octeontx2.rst b/doc/guides/platform/octeontx2.rst
index d38a4c1ed..7dd695175 100644
--- a/doc/guides/platform/octeontx2.rst
+++ b/doc/guides/platform/octeontx2.rst
@@ -13,6 +13,7 @@ More information about OCTEON TX2 SoC can be found at `Marvell Official Website
 Supported OCTEON TX2 SoCs
 -------------------------
 
+- CN98xx
 - CN96xx
 - CN93xx
 
diff --git a/drivers/common/octeontx2/hw/otx2_rvu.h b/drivers/common/octeontx2/hw/otx2_rvu.h
index f2037ec57..330bfb37f 100644
--- a/drivers/common/octeontx2/hw/otx2_rvu.h
+++ b/drivers/common/octeontx2/hw/otx2_rvu.h
@@ -134,11 +134,12 @@
 #define RVU_BLOCK_ADDR_RVUM                 (0x0ull)
 #define RVU_BLOCK_ADDR_LMT                  (0x1ull)
 #define RVU_BLOCK_ADDR_NPA                  (0x3ull)
+#define RVU_BLOCK_ADDR_NIX0                 (0x4ull)
+#define RVU_BLOCK_ADDR_NIX1                 (0x5ull)
 #define RVU_BLOCK_ADDR_NPC                  (0x6ull)
 #define RVU_BLOCK_ADDR_SSO                  (0x7ull)
 #define RVU_BLOCK_ADDR_SSOW                 (0x8ull)
 #define RVU_BLOCK_ADDR_TIM                  (0x9ull)
-#define RVU_BLOCK_ADDR_NIX0                 (0x4ull)
 #define RVU_BLOCK_ADDR_CPT0                 (0xaull)
 #define RVU_BLOCK_ADDR_NDC0                 (0xcull)
 #define RVU_BLOCK_ADDR_NDC1                 (0xdull)
diff --git a/drivers/net/octeontx2/otx2_ethdev.c b/drivers/net/octeontx2/otx2_ethdev.c
index 3f3f0a693..095506034 100644
--- a/drivers/net/octeontx2/otx2_ethdev.c
+++ b/drivers/net/octeontx2/otx2_ethdev.c
@@ -2177,6 +2177,20 @@ otx2_eth_dev_is_sdp(struct rte_pci_device *pci_dev)
 	return false;
 }
 
+static inline uint64_t
+nix_get_blkaddr(struct otx2_eth_dev *dev)
+{
+	uint64_t reg;
+
+	/* Reading the discovery register to know which NIX is the LF
+	 * attached to.
+	 */
+	reg = otx2_read64(dev->bar2 +
+			  RVU_PF_BLOCK_ADDRX_DISC(RVU_BLOCK_ADDR_NIX0));
+
+	return reg & 0x1FFULL ? RVU_BLOCK_ADDR_NIX0 : RVU_BLOCK_ADDR_NIX1;
+}
+
 static int
 otx2_eth_dev_init(struct rte_eth_dev *eth_dev)
 {
@@ -2236,7 +2250,6 @@ otx2_eth_dev_init(struct rte_eth_dev *eth_dev)
 	dev->configured = 0;
 	dev->drv_inited = true;
 	dev->ptype_disable = 0;
-	dev->base = dev->bar2 + (RVU_BLOCK_ADDR_NIX0 << 20);
 	dev->lmt_addr = dev->bar2 + (RVU_BLOCK_ADDR_LMT << 20);
 
 	/* Attach NIX LF */
@@ -2244,6 +2257,8 @@ otx2_eth_dev_init(struct rte_eth_dev *eth_dev)
 	if (rc)
 		goto otx2_npa_uninit;
 
+	dev->base = dev->bar2 + (nix_get_blkaddr(dev) << 20);
+
 	/* Get NIX MSIX offset */
 	rc = nix_lf_get_msix_offset(dev);
 	if (rc)
-- 
2.18.0