doc: remove mlx4 Rx inline support

[dpdk.git] / doc / guides / nics / mlx4.rst

diff --git a/doc/guides/nics/mlx4.rst b/doc/guides/nics/mlx4.rst
index b6aaee2..7c43177 100644 (file)
--- a/doc/guides/nics/mlx4.rst
+++ b/doc/guides/nics/mlx4.rst
@@ -78,24 +78,9 @@ Features
 --------
 
 - Multi arch support: x86_64 and POWER8.
-- RSS, also known as RCA, is supported. In this mode the number of
-  configured RX queues must be a power of two.
-- VLAN filtering is supported.
 - Link state information is provided.
-- Multiple MAC addresses (unicast, multicast) can be configured.
-- Scattered packets are supported for TX and RX.
-- Inner L3/L4 (IP, TCP and UDP) TX/RX checksum offloading and validation.
-- Outer L3 (IP) TX/RX checksum offloading and validation for VXLAN frames.
 - RX interrupts.
 
-Limitations
------------
-
-- RSS hash key cannot be modified.
-- RSS RETA cannot be configured
-- RSS always includes L3 (IPv4/IPv6) and L4 (UDP/TCP). They cannot be
-  dissociated.
-
 Configuration
 -------------
 
@@ -122,11 +107,6 @@ These options can be modified in the ``.config`` file.
   to abort with harmless debugging messages as a workaround.
   Relevant only when CONFIG_RTE_LIBRTE_MLX4_DEBUG is enabled.
 
-- ``CONFIG_RTE_LIBRTE_MLX4_MAX_INLINE`` (default **0**)
-
-  Amount of data to be inlined during TX operations. Improves latency but
-  lowers throughput.
-
 - ``CONFIG_RTE_LIBRTE_MLX4_TX_MP_CACHE`` (default **8**)
 
   Maximum number of cached memory pools (MPs) per TX queue. Each MP from
@@ -135,21 +115,9 @@ These options can be modified in the ``.config`` file.
 
   This value is always 1 for RX queues since they use a single MP.
 
-Environment variables
-~~~~~~~~~~~~~~~~~~~~~
-
-- ``MLX4_INLINE_RECV_SIZE``
-
-  A nonzero value enables inline receive for packets up to that size. May
-  significantly improve performance in some cases but lower it in
-  others. Requires careful testing.
-
 Run-time configuration
 ~~~~~~~~~~~~~~~~~~~~~~
 
-- The only constraint when RSS mode is requested is to make sure the number
-  of RX queues is a power of two. This is a hardware requirement.
-
 - librte_pmd_mlx4 brings kernel network interfaces up during initialization
   because it is affected by their state. Forcing them down prevents packets
   reception.
@@ -348,10 +316,7 @@ Performance tuning
 
         cat /sys/module/mlx4_core/parameters/log_num_mgm_entry_size
 
-2. Use environment variable MLX4_INLINE_RECV_SIZE=64 to get maximum
-   performance for 64B messages.
-
-3. Use the CPU near local NUMA node to which the PCIe adapter is connected,
+2. Use the CPU near local NUMA node to which the PCIe adapter is connected,
    for better performance. For VMs, verify that the right CPU
    and NUMA node are pinned according to the above. Run:
 
@@ -361,19 +326,19 @@ Performance tuning
 
    to identify the NUMA node to which the PCIe adapter is connected.
 
-4. If more than one adapter is used, and root complex capabilities allow
+3. If more than one adapter is used, and root complex capabilities allow
    to put both adapters on the same NUMA node without PCI bandwidth degradation,
    it is recommended to locate both adapters on the same NUMA node.
    This in order to forward packets from one to the other without
    NUMA performance penalty.
 
-5. Disable pause frames:
+4. Disable pause frames:
 
    .. code-block:: console
 
         ethtool -A <netdev> rx off tx off
 
-6. Verify IO non-posted prefetch is disabled by default. This can be checked
+5. Verify IO non-posted prefetch is disabled by default. This can be checked
    via the BIOS configuration. Please contact you server provider for more
    information about the settings.