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From: Srikanth Yalavarthi <syalavarthi@marvell.com>
To: Ray Kinsella <mdr@ashroe.eu>
CC: <dev@dpdk.org>, <jerinj@marvell.com>, <sshankarnara@marvell.com>,
<dmitry.kozliuk@gmail.com>, Srikanth Yalavarthi <syalavarthi@marvell.com>
Subject: [PATCH v5 1/1] eal: add internal function to get base address
Date: Tue, 18 Jan 2022 05:33:40 -0800
Message-ID: <20220118133340.25225-1-syalavarthi@marvell.com>
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Added an internal helper to get OS-specific EAL mapping base address
This helper can be used by the drivers to program offload / accelerator
devices, where the base address can be used as a reference address by
the accelerator to access the host memory
An address can also be represented as an offset relative to the base
address using smaller data types
Signed-off-by: Srikanth Yalavarthi <syalavarthi@marvell.com>
---
lib/eal/common/eal_common_config.c | 9 +++++++++
lib/eal/include/rte_eal.h | 9 +++++++++
lib/eal/version.map | 1 +
3 files changed, 19 insertions(+)
diff --git a/lib/eal/common/eal_common_config.c b/lib/eal/common/eal_common_config.c
index 1c4c4dd585..19598cb28d 100644
--- a/lib/eal/common/eal_common_config.c
+++ b/lib/eal/common/eal_common_config.c
@@ -87,3 +87,12 @@ rte_eal_has_pci(void)
{
return !internal_config.no_pci;
}
+
+/* Get the EAL base address */
+uint64_t
+rte_eal_get_baseaddr(void)
+{
+ return (internal_config.base_virtaddr != 0) ?
+ (uint64_t) internal_config.base_virtaddr :
+ eal_get_baseaddr();
+}
diff --git a/lib/eal/include/rte_eal.h b/lib/eal/include/rte_eal.h
index 5a34a6acd9..29298c3c83 100644
--- a/lib/eal/include/rte_eal.h
+++ b/lib/eal/include/rte_eal.h
@@ -475,6 +475,15 @@ rte_eal_mbuf_user_pool_ops(void);
const char *
rte_eal_get_runtime_dir(void);
+/**
+ * Get the OS-specific EAL base address.
+ *
+ * @return
+ * The base address.
+ */
+__rte_internal
+uint64_t rte_eal_get_baseaddr(void);
+
#ifdef __cplusplus
}
#endif
diff --git a/lib/eal/version.map b/lib/eal/version.map
index ab28c22791..b53eeb30d7 100644
--- a/lib/eal/version.map
+++ b/lib/eal/version.map
@@ -425,6 +425,7 @@ EXPERIMENTAL {
INTERNAL {
global:
+ rte_eal_get_baseaddr;
rte_firmware_read;
rte_intr_allow_others;
rte_intr_cap_multiple;
--
2.17.1