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ethdev: support WRED thresholds in bytes

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WRED thresholds can be specified in bytes if the TM leaf
node supports it. Also extend WRED thresholds to 32 bits from 16.

TM capability (port/level/queue) fields cman_wred_packet_mode_supported and
cman_wred_byte_mode_supported, when non-zero, indicate support for WRED
thresholds in packets and bytes respectively.

The packet_mode member of struct rte_tm_wred_params, when non-zero,
indicates that the min and max thresholds are specified in
packets and when zero, indicates that the min and max thresholds
are specified in bytes.

Signed-off-by: Nikhil Rao <nikhil.rao@intel.com>
This commit is contained in:
Nikhil Rao 2018-02-20 08:30:53 -05:00 committed by Cristian Dumitrescu
parent 50752f06d2
commit 2fcf2f104f
2 changed files with 71 additions and 5 deletions
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23
drivers/net/softnic/rte_eth_softnic_tm.c
View File

@ -479,6 +479,8 @@ static const struct rte_tm_capabilities tm_cap = {
.sched_wfq_n_groups_max = 1,
.sched_wfq_weight_max = UINT32_MAX,
.cman_wred_packet_mode_supported = WRED_SUPPORTED,
.cman_wred_byte_mode_supported = 0,
.cman_head_drop_supported = 0,
.cman_wred_context_n_max = 0,
.cman_wred_context_private_n_max = 0,
@ -667,6 +669,8 @@ static const struct rte_tm_level_capabilities tm_level_cap[] = {
.shaper_shared_n_max = 0,
.cman_head_drop_supported = 0,
.cman_wred_packet_mode_supported = WRED_SUPPORTED,
.cman_wred_byte_mode_supported = 0,
.cman_wred_context_private_supported = WRED_SUPPORTED,
.cman_wred_context_shared_n_max = 0,
@ -828,6 +832,8 @@ static const struct rte_tm_node_capabilities tm_node_cap[] = {
{.leaf = {
.cman_head_drop_supported = 0,
.cman_wred_packet_mode_supported = WRED_SUPPORTED,
.cman_wred_byte_mode_supported = 0,
.cman_wred_context_private_supported = WRED_SUPPORTED,
.cman_wred_context_shared_n_max = 0,
} },
@ -1243,12 +1249,23 @@ wred_profile_check(struct rte_eth_dev *dev,
NULL,
rte_strerror(EINVAL));
/* WRED profile should be in packet mode */
if (profile->packet_mode == 0)
return -rte_tm_error_set(error,
ENOTSUP,
RTE_TM_ERROR_TYPE_WRED_PROFILE,
NULL,
rte_strerror(ENOTSUP));
/* min_th <= max_th, max_th > 0 */
for (color = RTE_TM_GREEN; color < RTE_TM_COLORS; color++) {
uint16_t min_th = profile->red_params[color].min_th;
uint16_t max_th = profile->red_params[color].max_th;
uint32_t min_th = profile->red_params[color].min_th;
uint32_t max_th = profile->red_params[color].max_th;
if (min_th > max_th || max_th == 0)
if (min_th > max_th ||
max_th == 0 ||
min_th > UINT16_MAX ||
max_th > UINT16_MAX)
return -rte_tm_error_set(error,
EINVAL,
RTE_TM_ERROR_TYPE_WRED_PROFILE,

53
lib/librte_ethdev/rte_tm.h
View File

@ -377,6 +377,22 @@ struct rte_tm_capabilities {
*/
uint32_t sched_wfq_weight_max;
/** WRED packet mode support. When non-zero, this parameter indicates
* that there is atleast one leaf node that supports the WRED packet
* mode, which might not be true for all the leaf nodes. In packet
* mode, the WRED thresholds specify the queue length in packets, as
* opposed to bytes.
*/
int cman_wred_packet_mode_supported;
/** WRED byte mode support. When non-zero, this parameter indicates that
* there is atleast one leaf node that supports the WRED byte mode,
* which might not be true for all the leaf nodes. In byte mode, the
* WRED thresholds specify the queue length in bytes, as opposed to
* packets.
*/
int cman_wred_byte_mode_supported;
/** Head drop algorithm support. When non-zero, this parameter
* indicates that there is at least one leaf node that supports the head
* drop algorithm, which might not be true for all the leaf nodes.
@ -628,6 +644,24 @@ struct rte_tm_level_capabilities {
*/
uint32_t shaper_shared_n_max;
/** WRED packet mode support. When non-zero, this
* parameter indicates that there is atleast one leaf
* node on this level that supports the WRED packet
* mode, which might not be true for all the leaf
* nodes. In packet mode, the WRED thresholds specify
* the queue length in packets, as opposed to bytes.
*/
int cman_wred_packet_mode_supported;
/** WRED byte mode support. When non-zero, this
* parameter indicates that there is atleast one leaf
* node on this level that supports the WRED byte mode,
* which might not be true for all the leaf nodes. In
* byte mode, the WRED thresholds specify the queue
* length in bytes, as opposed to packets.
*/
int cman_wred_byte_mode_supported;
/** Head drop algorithm support. When non-zero, this
* parameter indicates that there is at least one leaf
* node on this level that supports the head drop
@ -743,6 +777,12 @@ struct rte_tm_node_capabilities {
/** Items valid only for leaf nodes. */
struct {
/** WRED packet mode support for current node. */
int cman_wred_packet_mode_supported;
/** WRED byte mode support for current node. */
int cman_wred_byte_mode_supported;
/** Head drop algorithm support for current node. */
int cman_head_drop_supported;
@ -791,10 +831,10 @@ enum rte_tm_cman_mode {
*/
struct rte_tm_red_params {
/** Minimum queue threshold */
uint16_t min_th;
uint32_t min_th;
/** Maximum queue threshold */
uint16_t max_th;
uint32_t max_th;
/** Inverse of packet marking probability maximum value (maxp), i.e.
* maxp_inv = 1 / maxp
@ -815,10 +855,19 @@ struct rte_tm_red_params {
* WRED context is used to perform congestion management for a single leaf
* node, while a shared WRED context is used to perform congestion management
* for a group of leaf nodes.
*
* @see struct rte_tm_capabilities::cman_wred_packet_mode_supported
* @see struct rte_tm_capabilities::cman_wred_byte_mode_supported
*/
struct rte_tm_wred_params {
/** One set of RED parameters per packet color */
struct rte_tm_red_params red_params[RTE_TM_COLORS];
/** When non-zero, the *min_th* and *max_th* thresholds are specified
* in packets (WRED packet mode). When zero, the *min_th* and *max_th*
* thresholds are specified in bytes (WRED byte mode)
*/
int packet_mode;
};
/**