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2019 09:05:15 +0000 To: Ferruh Yigit , , , , , John McNamara , Marko Kovacevic CC: References: <20191029153722.4547-1-pbhagavatula@marvell.com> <20191106191803.15098-1-pbhagavatula@marvell.com> <20191106191803.15098-2-pbhagavatula@marvell.com> <1cedc5eb-2485-9c3b-bb02-b7a0fba3c483@intel.com> From: Andrew Rybchenko Openpgp: preference=signencrypt Autocrypt: addr=arybchenko@solarflare.com; keydata= mQINBF2681gBEACbdTxu8eLL3UX2oAelsnK9GkeaJeUYSOHPJQpV7RL/iaIskqTwBRnhjXt7 j9UEwGA+omnOmqQMpeQTb/F9Ma2dYE+Hw4/t/1KVjxr3ehFaASvwR4fWJfO4e2l/Rk4rG6Yi 5r6CWU2y8su2654Fr8KFc+cMGOAgKoZTZHZsRy5lHpMlemeF+VZkv8L5sYJWPnsypgqlCG3h v6lbtfZs+QqYbFH6bqoZwBAl5irmxywGR7ZJr1GLUZZ1lfdazSY8r6Vz0/Ip/KVxGu2uxo81 QCsAj0ZsQtwji9Sds/prTiPrIjx8Fc/tfbnAuVuPcnPbczwCJACzQr4q26XATL3kVuZhSBWh 4XfO/EAUuEq5AemUG5DDTM87g7Lp4eT9gMZB6P+rJwWPNWTiV3L7Cn+fO+l9mTPnOqdzBgDe OaulKiNSft1o0DY4bGzOmM2ad2cZt0jfnbMPMTE9zsr6+RFa+M8Ct20o6U1MUE4vP6veErMK of4kZ8PdoMM+Sq1hxMPNtlcVBSP9xMmdSZPlfDYI5VWosOceEcz7XZdjBJKdwKuz70V7eac4 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<0f209606-a5f0-cfdb-260e-bc81405c6a8e@solarflare.com> Date: Fri, 8 Nov 2019 12:05:10 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <1cedc5eb-2485-9c3b-bb02-b7a0fba3c483@intel.com> Content-Type: text/plain; charset="utf-8" Content-Language: en-GB Content-Transfer-Encoding: 8bit X-Originating-IP: [91.220.146.112] X-ClientProxiedBy: ocex03.SolarFlarecom.com (10.20.40.36) To ukex01.SolarFlarecom.com (10.17.10.4) X-TM-AS-Product-Ver: SMEX-12.5.0.1300-8.5.1010-25028.003 X-TM-AS-Result: No-16.534400-8.000000-10 X-TMASE-MatchedRID: 8HTFlOrbAtHmLzc6AOD8DfHkpkyUphL9NV9S7O+u3KYRHgO3hlQeWerO SEJRBEaX+7oxQF5T5wUIl1lIQSnNKOzvTxSiXJG/6fUfELqFUH+8dr6FG8BQfeZAlRR6AIJ7eCN V1mMi/46MR3kDhegnTHzs73bFScRmtrQSlX9RxUXZ+i/tPCEvyald1ZriBTRLs4be7XhW2Z5yKM xmuvaJna3aC25avUuaHVVF1Gr4vCsij1rXhFZBDP9XRIMLUOjQv8jdqvFOu+J/KM1eVsG+dPeHa PJtCROSfsmDiqsX0CA4UoCJNJJ1MqHECosCGgdm/ccgt/EtX/1dt5rzpYPEDFSOymiJfTYXM/3+ 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List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 11/7/19 9:28 PM, Ferruh Yigit wrote: > On 11/6/2019 7:17 PM, pbhagavatula@marvell.com wrote: >> From: Pavan Nikhilesh >> >> Add `rte_eth_dev_set_ptypes` function that will allow the application >> to inform the PMD about reduced range of packet types to handle. >> Based on the ptypes set PMDs can optimize their Rx path. >> >> -If application doesn’t want any ptype information it can call >> `rte_eth_dev_set_ptypes(ethdev_id, RTE_PTYPE_UNKNOWN, NULL, 0)` >> and PMD may skip packet type processing and set rte_mbuf::packet_type to >> RTE_PTYPE_UNKNOWN. >> >> -If application doesn’t call `rte_eth_dev_set_ptypes` PMD can return >> `rte_mbuf::packet_type` with `rte_eth_dev_get_supported_ptypes`. >> >> -If application is interested only in L2/L3 layer, it can inform the PMD >> to update `rte_mbuf::packet_type` with L2/L3 ptype by calling >> `rte_eth_dev_set_ptypes(ethdev_id, >> RTE_PTYPE_L2_MASK | RTE_PTYPE_L3_MASK, NULL, 0)`. >> >> Suggested-by: Konstantin Ananyev >> Signed-off-by: Pavan Nikhilesh >> Reviewed-by: Andrew Rybchenko >> --- >> doc/guides/nics/features.rst | 7 +- >> doc/guides/rel_notes/release_19_11.rst | 8 +++ >> lib/librte_ethdev/rte_ethdev.c | 87 +++++++++++++++++++++++- >> lib/librte_ethdev/rte_ethdev.h | 36 ++++++++++ >> lib/librte_ethdev/rte_ethdev_core.h | 18 +++++ >> lib/librte_ethdev/rte_ethdev_version.map | 1 + >> 6 files changed, 154 insertions(+), 3 deletions(-) >> >> diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst >> index 7a31cf7c8..f33e8e6d4 100644 >> --- a/doc/guides/nics/features.rst >> +++ b/doc/guides/nics/features.rst >> @@ -583,9 +583,12 @@ Packet type parsing >> ------------------- >> >> Supports packet type parsing and returns a list of supported types. >> +Allows application to set ptypes it is interested in. >> >> -* **[implements] eth_dev_ops**: ``dev_supported_ptypes_get``. >> -* **[related] API**: ``rte_eth_dev_get_supported_ptypes()``. >> +* **[implements] eth_dev_ops**: ``dev_supported_ptypes_get``, >> +* **[related] API**: ``rte_eth_dev_get_supported_ptypes()``, >> + ``rte_eth_dev_set_ptypes()``, ``dev_ptypes_set``. >> +* **[provides] mbuf**: ``mbuf.packet_type``. >> >> >> .. _nic_features_timesync: >> diff --git a/doc/guides/rel_notes/release_19_11.rst b/doc/guides/rel_notes/release_19_11.rst >> index 23182d187..2fa54aadc 100644 >> --- a/doc/guides/rel_notes/release_19_11.rst >> +++ b/doc/guides/rel_notes/release_19_11.rst >> @@ -86,6 +86,13 @@ New Features >> SET_TAG action and TAG item have been added to support transient flow >> tag. >> >> +* **Added ethdev API to set supported packet types** >> + >> + * Added new API ``rte_eth_dev_set_ptypes`` that allows an application to >> + inform PMD about about reduced range of packet types to handle. >> + * This scheme will allow PMDs to avoid lookup to internal ptype table on Rx >> + and thereby improve Rx performance if application wishes do so. >> + >> * **Updated the enic driver.** >> >> * Added support for Geneve with options offload. >> @@ -258,6 +265,7 @@ New Features >> * Rx metadata is delivered to host via a dynamic field of ``rte_mbuf`` with >> PKT_RX_DYNF_METADATA. >> >> + >> Removed Items >> ------------- >> >> diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c >> index 652c369e5..13e6daaf4 100644 >> --- a/lib/librte_ethdev/rte_ethdev.c >> +++ b/lib/librte_ethdev/rte_ethdev.c >> @@ -2879,6 +2879,92 @@ rte_eth_dev_get_supported_ptypes(uint16_t port_id, uint32_t ptype_mask, >> return j; >> } >> >> +int >> +rte_eth_dev_set_ptypes(uint16_t port_id, uint32_t ptype_mask, >> + uint32_t *set_ptypes, unsigned int num) >> +{ >> + const uint32_t valid_ptype_masks[] = { >> + RTE_PTYPE_L2_MASK, >> + RTE_PTYPE_L3_MASK, >> + RTE_PTYPE_L4_MASK, >> + RTE_PTYPE_TUNNEL_MASK, >> + RTE_PTYPE_INNER_L2_MASK, >> + RTE_PTYPE_INNER_L3_MASK, >> + RTE_PTYPE_INNER_L4_MASK, >> + }; >> + const uint32_t *all_ptypes; >> + struct rte_eth_dev *dev; >> + uint32_t unused_mask; >> + unsigned int i, j; >> + int ret; >> + >> + RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV); >> + dev = &rte_eth_devices[port_id]; >> + >> + if (num > 0 && set_ptypes == NULL) >> + return -EINVAL; >> + >> + if (*dev->dev_ops->dev_supported_ptypes_get == NULL || >> + *dev->dev_ops->dev_ptypes_set == NULL) { >> + ret = 0; >> + goto ptype_unknown; >> + } > > Hi Pavan, Andrew, > > Why API is not returning "-ENOTSUP" id dev_ops is not provided as done it other > APIs? As I understand the reason behind it is an optional nature of the callback. It is just an optimization and there is no point to complicate applications code to check and treat -ENOTSUP is OK. >> + >> + if (ptype_mask == 0) { >> + ret = (*dev->dev_ops->dev_ptypes_set)(dev, >> + ptype_mask); >> + goto ptype_unknown; >> + } >> + >> + unused_mask = ptype_mask; >> + for (i = 0; i < RTE_DIM(valid_ptype_masks); i++) { >> + uint32_t mask = ptype_mask & valid_ptype_masks[i]; >> + if (mask && mask != valid_ptype_masks[i]) { >> + ret = -EINVAL; >> + goto ptype_unknown; >> + } >> + unused_mask &= ~valid_ptype_masks[i]; >> + } > > What does above block does? > Does it mean 'ptype_mask' only can be combination of 'valid_ptype_masks' items? Yes. > Let's say can't I set only 'RTE_PTYPE_L2_ETHER' as requested ptype? Yes > Why this limitation and is it documented anywhere, like the API documentation? It is simply incorrect to have non-mask bits here. RTE_PTYPE_L2_ETHER & RTE_PTYPE_L2_ETHER_ARP != 0 It is documented in the ptype_mask parameter description. >> + >> + if (unused_mask) { >> + ret = -EINVAL; >> + goto ptype_unknown; >> + } >> + >> + all_ptypes = (*dev->dev_ops->dev_supported_ptypes_get)(dev); >> + if (all_ptypes == NULL) { >> + ret = 0; >> + goto ptype_unknown; >> + } >> + >> + /* >> + * Accodommodate as many set_ptypes as possible. If the supplied > > s/Accodommodate/Accommodate > >> + * set_ptypes array is insufficient fill it partially. >> + */ >> + for (i = 0, j = 0; set_ptypes != NULL && >> + (all_ptypes[i] != RTE_PTYPE_UNKNOWN); ++i) { >> + if (ptype_mask & all_ptypes[i]) { >> + if (j < num - 1) { >> + set_ptypes[j] = all_ptypes[i]; >> + j++; >> + continue; >> + } >> + break; >> + } >> + } >> + >> + if (set_ptypes != NULL && j < num) >> + set_ptypes[j] = RTE_PTYPE_UNKNOWN; >> + >> + return (*dev->dev_ops->dev_ptypes_set)(dev, ptype_mask); > > Only a question, at this stage API knows the supported ptypes by device, does it > make sense to check if 'ptype_mask' has anything unsupported instead of passing > it to the driver and expect driver to check it? It is also explained by the nature of the API. Application says: I'm interested in the following ptypes only to let PMD know that it could drop classification behind it. If PMD does not support some layers, it will not provide classification anyway. >> + >> +ptype_unknown: >> + if (num > 0) >> + set_ptypes[0] = RTE_PTYPE_UNKNOWN; >> + >> + return ret; >> +} >> + >> int >> rte_eth_macaddr_get(uint16_t port_id, struct rte_ether_addr *mac_addr) >> { >> @@ -2891,7 +2977,6 @@ rte_eth_macaddr_get(uint16_t port_id, struct rte_ether_addr *mac_addr) >> return 0; >> } >> >> - >> int >> rte_eth_dev_get_mtu(uint16_t port_id, uint16_t *mtu) >> { >> diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h >> index 44d77b332..a7872819d 100644 >> --- a/lib/librte_ethdev/rte_ethdev.h >> +++ b/lib/librte_ethdev/rte_ethdev.h >> @@ -2604,6 +2604,42 @@ int rte_eth_dev_fw_version_get(uint16_t port_id, >> */ >> int rte_eth_dev_get_supported_ptypes(uint16_t port_id, uint32_t ptype_mask, >> uint32_t *ptypes, int num); >> +/** >> + * @warning >> + * @b EXPERIMENTAL: this API may change without prior notice. >> + * >> + * Inform Ethernet device about reduced range of packet types to handle. >> + * >> + * Application can use this function to set only specific ptypes that it's >> + * interested. This information can be used by the PMD to optimize Rx path. >> + * >> + * The function accepts an array `set_ptypes` allocated by the caller to >> + * store the packet types set by the driver, the last element of the array >> + * is set to RTE_PTYPE_UNKNOWN. The size of the `set_ptype` array should be >> + * `rte_eth_dev_get_supported_ptypes() + 1` else it might only be filled >> + * partially. >> + * >> + * @param port_id >> + * The port identifier of the Ethernet device. >> + * @param ptype_mask >> + * The ptype family that application is interested in should be bitwise OR of >> + * RTE_PTYPE_*_MASK or 0. > > No strong opinion but is it really a mask? it doesn't used to mask any value, > but it is list of ptypes that application requests, in a bitwise ORed form, so I > this it can be ptypes. See above. >> + * @param set_ptypes >> + * An array pointer to store set packet types, allocated by caller. The >> + * function marks the end of array with RTE_PTYPE_UNKNOWN. > > Not for this patch, but is an API also required to get current supported ptypes > from the driver? Even application keeps this list, something can reset in the > device/driver, supported pytpe list can be changed and it can differ with what > application knows. I would say that set_ptypes should not affected supported_ptypes. >> + * @param num >> + * Size of the array pointed by param ptypes. >> + * Should be rte_eth_dev_get_supported_ptypes() + 1 to accommodate the >> + * set ptypes. >> + * @return >> + * - (0) if Success. >> + * - (-ENODEV) if *port_id* invalid. >> + * - (-EINVAL) if *ptype_mask* is invalid (or) set_ptypes is NULL and >> + * num > 0. >> + */ >> +__rte_experimental >> +int rte_eth_dev_set_ptypes(uint16_t port_id, uint32_t ptype_mask, >> + uint32_t *set_ptypes, unsigned int num); >> >> /** >> * Retrieve the MTU of an Ethernet device. >> diff --git a/lib/librte_ethdev/rte_ethdev_core.h b/lib/librte_ethdev/rte_ethdev_core.h >> index f215af7c9..657c39b56 100644 >> --- a/lib/librte_ethdev/rte_ethdev_core.h >> +++ b/lib/librte_ethdev/rte_ethdev_core.h >> @@ -234,6 +234,22 @@ typedef int (*eth_dev_infos_get_t)(struct rte_eth_dev *dev, >> typedef const uint32_t *(*eth_dev_supported_ptypes_get_t)(struct rte_eth_dev *dev); >> /**< @internal Get supported ptypes of an Ethernet device. */ >> >> +/** >> + * @internal >> + * Inform Ethernet device about reduced range of packet types to handle. >> + * >> + * @param dev >> + * The Ethernet device identifier. >> + * @param ptype_mask >> + * The ptype family that application is interested in should be bitwise OR of >> + * RTE_PTYPE_*_MASK or 0. >> + * @return >> + * - (0) if Success. >> + * - (-EINVAL) if *ptype_mask* is invalid. >> + */ >> +typedef int (*eth_dev_ptypes_set_t)(struct rte_eth_dev *dev, >> + uint32_t ptype_mask); >> + >> typedef int (*eth_queue_start_t)(struct rte_eth_dev *dev, >> uint16_t queue_id); >> /**< @internal Start rx and tx of a queue of an Ethernet device. */ >> @@ -630,6 +646,8 @@ struct eth_dev_ops { >> eth_fw_version_get_t fw_version_get; /**< Get firmware version. */ >> eth_dev_supported_ptypes_get_t dev_supported_ptypes_get; >> /**< Get packet types supported and identified by device. */ >> + eth_dev_ptypes_set_t dev_ptypes_set; >> + /**< Inform Ethernet device about reduced range of packet types to handle. */ >> >> vlan_filter_set_t vlan_filter_set; /**< Filter VLAN Setup. */ >> vlan_tpid_set_t vlan_tpid_set; /**< Outer/Inner VLAN TPID Setup. */ >> diff --git a/lib/librte_ethdev/rte_ethdev_version.map b/lib/librte_ethdev/rte_ethdev_version.map >> index ee289ef13..ccfbeae23 100644 >> --- a/lib/librte_ethdev/rte_ethdev_version.map >> +++ b/lib/librte_ethdev/rte_ethdev_version.map >> @@ -292,4 +292,5 @@ EXPERIMENTAL { >> rte_flow_dynf_metadata_offs; >> rte_flow_dynf_metadata_mask; >> rte_flow_dynf_metadata_register; >> + rte_eth_dev_set_ptypes; >> }; >>