[v3] net/i40e: Eliminate weak symbols in i40e_rxtx.c
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Commit Message
Use of weak symbols can hide makefile errors especially when
custom makefiles are used. Removing the use of weak symbols
to avoid a stub function being linked in production code.
Signed-off-by: David Harton <dharton@cisco.com>
---
v3 - added CONFIG_RTE_LIBRTE_I40E_INC_VECTOR to makefile
v2 - added CC_AVX2_SUPPORT check to code enabling avx2 vectors
drivers/net/i40e/Makefile | 3 ++
drivers/net/i40e/i40e_rxtx.c | 60 +++++++++++++++++++-----------------
drivers/net/i40e/meson.build | 2 ++
3 files changed, 37 insertions(+), 28 deletions(-)
Comments
On Thu, May 16, 2019 at 02:28:03PM -0400, David Harton wrote:
> Use of weak symbols can hide makefile errors especially when
> custom makefiles are used. Removing the use of weak symbols
> to avoid a stub function being linked in production code.
>
> Signed-off-by: David Harton <dharton@cisco.com>
> ---
>
> v3 - added CONFIG_RTE_LIBRTE_I40E_INC_VECTOR to makefile
> v2 - added CC_AVX2_SUPPORT check to code enabling avx2 vectors
>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
> -----Original Message-----
> From: Richardson, Bruce
> Sent: Friday, May 17, 2019 3:21 AM
> To: David Harton <dharton@cisco.com>
> Cc: dev@dpdk.org; Xing, Beilei <beilei.xing@intel.com>; Zhang, Qi Z
> <qi.z.zhang@intel.com>
> Subject: Re: [PATCH v3] net/i40e: Eliminate weak symbols in i40e_rxtx.c
>
> On Thu, May 16, 2019 at 02:28:03PM -0400, David Harton wrote:
> > Use of weak symbols can hide makefile errors especially when custom
> > makefiles are used. Removing the use of weak symbols to avoid a stub
> > function being linked in production code.
> >
> > Signed-off-by: David Harton <dharton@cisco.com>
> > ---
> >
> > v3 - added CONFIG_RTE_LIBRTE_I40E_INC_VECTOR to makefile
> > v2 - added CC_AVX2_SUPPORT check to code enabling avx2 vectors
> >
> Acked-by: Bruce Richardson <bruce.richardson@intel.com>
Applied to dpdk-next-net-intel.
Thanks
Qi
@@ -89,6 +89,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_I40E_PMD) += rte_pmd_i40e.c
SRCS-$(CONFIG_RTE_LIBRTE_I40E_PMD) += i40e_tm.c
SRCS-$(CONFIG_RTE_LIBRTE_I40E_PMD) += i40e_vf_representor.c
+ifeq ($(CONFIG_RTE_LIBRTE_I40E_INC_VECTOR),y)
ifeq ($(findstring RTE_MACHINE_CPUFLAG_AVX2,$(CFLAGS)),RTE_MACHINE_CPUFLAG_AVX2)
CC_AVX2_SUPPORT=1
else
@@ -103,9 +104,11 @@ else
endif
endif
endif
+endif
ifeq ($(CC_AVX2_SUPPORT), 1)
SRCS-$(CONFIG_RTE_LIBRTE_I40E_INC_VECTOR) += i40e_rxtx_vec_avx2.c
+ CFLAGS_i40e_rxtx.o += -DCC_AVX2_SUPPORT
endif
# install this header file
@@ -2919,7 +2919,7 @@ i40e_txq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
static eth_rx_burst_t
i40e_get_latest_rx_vec(bool scatter)
{
-#ifdef RTE_ARCH_X86
+#if defined(RTE_ARCH_X86) && defined(CC_AVX2_SUPPORT)
if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2))
return scatter ? i40e_recv_scattered_pkts_vec_avx2 :
i40e_recv_pkts_vec_avx2;
@@ -2931,7 +2931,7 @@ i40e_get_latest_rx_vec(bool scatter)
static eth_rx_burst_t
i40e_get_recommend_rx_vec(bool scatter)
{
-#ifdef RTE_ARCH_X86
+#if defined(RTE_ARCH_X86) && defined(CC_AVX2_SUPPORT)
/*
* since AVX frequency can be different to base frequency, limit
* use of AVX2 version to later plaforms, not all those that could
@@ -3048,7 +3048,7 @@ i40e_set_tx_function_flag(struct rte_eth_dev *dev, struct i40e_tx_queue *txq)
static eth_tx_burst_t
i40e_get_latest_tx_vec(void)
{
-#ifdef RTE_ARCH_X86
+#if defined(RTE_ARCH_X86) && defined(CC_AVX2_SUPPORT)
if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2))
return i40e_xmit_pkts_vec_avx2;
#endif
@@ -3058,7 +3058,7 @@ i40e_get_latest_tx_vec(void)
static eth_tx_burst_t
i40e_get_recommend_tx_vec(void)
{
-#ifdef RTE_ARCH_X86
+#if defined(RTE_ARCH_X86) && defined(CC_AVX2_SUPPORT)
/*
* since AVX frequency can be different to base frequency, limit
* use of AVX2 version to later plaforms, not all those that could
@@ -3181,14 +3181,15 @@ i40e_set_default_pctype_table(struct rte_eth_dev *dev)
}
}
+#ifndef RTE_LIBRTE_I40E_INC_VECTOR
/* Stubs needed for linkage when CONFIG_RTE_LIBRTE_I40E_INC_VECTOR is set to 'n' */
-__rte_weak int
+int
i40e_rx_vec_dev_conf_condition_check(struct rte_eth_dev __rte_unused *dev)
{
return -1;
}
-__rte_weak uint16_t
+uint16_t
i40e_recv_pkts_vec(
void __rte_unused *rx_queue,
struct rte_mbuf __rte_unused **rx_pkts,
@@ -3197,7 +3198,7 @@ i40e_recv_pkts_vec(
return 0;
}
-__rte_weak uint16_t
+uint16_t
i40e_recv_scattered_pkts_vec(
void __rte_unused *rx_queue,
struct rte_mbuf __rte_unused **rx_pkts,
@@ -3206,52 +3207,55 @@ i40e_recv_scattered_pkts_vec(
return 0;
}
-__rte_weak uint16_t
-i40e_recv_pkts_vec_avx2(void __rte_unused *rx_queue,
- struct rte_mbuf __rte_unused **rx_pkts,
- uint16_t __rte_unused nb_pkts)
-{
- return 0;
-}
-
-__rte_weak uint16_t
-i40e_recv_scattered_pkts_vec_avx2(void __rte_unused *rx_queue,
- struct rte_mbuf __rte_unused **rx_pkts,
- uint16_t __rte_unused nb_pkts)
-{
- return 0;
-}
-
-__rte_weak int
+int
i40e_rxq_vec_setup(struct i40e_rx_queue __rte_unused *rxq)
{
return -1;
}
-__rte_weak int
+int
i40e_txq_vec_setup(struct i40e_tx_queue __rte_unused *txq)
{
return -1;
}
-__rte_weak void
+void
i40e_rx_queue_release_mbufs_vec(struct i40e_rx_queue __rte_unused*rxq)
{
return;
}
-__rte_weak uint16_t
+uint16_t
i40e_xmit_fixed_burst_vec(void __rte_unused * tx_queue,
struct rte_mbuf __rte_unused **tx_pkts,
uint16_t __rte_unused nb_pkts)
{
return 0;
}
+#endif /* ifndef RTE_LIBRTE_I40E_INC_VECTOR */
+
+#ifndef CC_AVX2_SUPPORT
+uint16_t
+i40e_recv_pkts_vec_avx2(void __rte_unused *rx_queue,
+ struct rte_mbuf __rte_unused **rx_pkts,
+ uint16_t __rte_unused nb_pkts)
+{
+ return 0;
+}
-__rte_weak uint16_t
+uint16_t
+i40e_recv_scattered_pkts_vec_avx2(void __rte_unused *rx_queue,
+ struct rte_mbuf __rte_unused **rx_pkts,
+ uint16_t __rte_unused nb_pkts)
+{
+ return 0;
+}
+
+uint16_t
i40e_xmit_pkts_vec_avx2(void __rte_unused * tx_queue,
struct rte_mbuf __rte_unused **tx_pkts,
uint16_t __rte_unused nb_pkts)
{
return 0;
}
+#endif /* ifndef CC_AVX2_SUPPORT */
@@ -35,8 +35,10 @@ if arch_subdir == 'x86'
# a. we have AVX supported in minimum instruction set baseline
# b. it's not minimum instruction set, but supported by compiler
if dpdk_conf.has('RTE_MACHINE_CPUFLAG_AVX2')
+ cflags += ['-DCC_AVX2_SUPPORT']
sources += files('i40e_rxtx_vec_avx2.c')
elif cc.has_argument('-mavx2')
+ cflags += ['-DCC_AVX2_SUPPORT']
i40e_avx2_lib = static_library('i40e_avx2_lib',
'i40e_rxtx_vec_avx2.c',
dependencies: [static_rte_ethdev,