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Mon, 6 Jul 2026 19:36:40 +0000 (GMT) From: Mingming Cao To: netdev@vger.kernel.org Cc: horms@kernel.org, bjking1@linux.ibm.com, haren@linux.ibm.com, ricklind@linux.ibm.com, mmc@linux.ibm.com, kuba@kernel.org, edumazet@google.com, pabeni@redhat.com, linuxppc-dev@lists.ozlabs.org, maddy@linux.ibm.com, mpe@ellerman.id.au, Dave Marquardt Subject: [PATCH net-next v3 06/15] ibmveth: Refactor TX resource allocation in open/close paths Date: Mon, 6 Jul 2026 12:35:54 -0700 Message-Id: <20260706193603.8039-7-mmc@linux.ibm.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20260706193603.8039-1-mmc@linux.ibm.com> References: <20260706193603.8039-1-mmc@linux.ibm.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Authority-Analysis: v=2.4 cv=M7J97Sws c=1 sm=1 tr=0 ts=6a4c03cc cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=mtsAU2ZvJdVy61tLPkIA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzA2MDE5NSBTYWx0ZWRfXyw6FXmZydTHW ZZz+lFLd5h3WjiPIiDFIMoTqH2MtwNJcwFkGKDNnXLJ/jtM97Qg1uxSKeaUP9XH31zoI4HCSmhv RgBLWvfifIn6jFJd053slBn4opMkCI+GXN47BiWpiKBeT1huQ/90jIuWRjGaN8IqynXXBIN5lgQ mtxJCwBrQlIhrpPhB/0g8t9WhXj+hrI0BhDGbhQ/iruZzVul0BAlWCzjg/lbWVI11/clw/RSS57 ViQYOvvlzMVjfVhTRCQDMIN6DXBlWmoPg3KMpwpD2St1/rd1jpVD586ys2f7YH7WUNyxIYx5C3x VdFZ0EU0u8T5ie8DnZjqsty8vm1WN/hhQVofhpX1ooL1xj2Q06l1f/EqVB9e7wdD1Kh+DEQuPfz /y2WbhE1rERg89aDdLmd0+8YvxEGsz7Zj4E2Zis3ILupNeeL4MQZi4MWmDfFeEYMvwKyQUSSvVZ 3v8hRPG3iqNw8lT+A1Q== X-Proofpoint-Spam-Info: AW1haW4tMjYwNzA2MDE5NSBTYWx0ZWRfX14oJahDFrEST n992p9X8Rp1xUicRfboAr+468Fy4RhMavZoYh6/Xs7znDLwvJYqPkeG1k3kbtFk2TPBAPTNhaEf R1ubFUKtUxNOlIBHr52ZijY21hrOw7s= X-Proofpoint-GUID: Q1VAz4Cau-gPe6BxyL1vYmzME6H1inx2 X-Proofpoint-ORIG-GUID: pY1KCm1Tw-JR-SeAfE-IbZ_mVpunhfGW X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-06_02,2026-07-06_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 lowpriorityscore=0 malwarescore=0 clxscore=1015 adultscore=0 priorityscore=1501 bulkscore=0 spamscore=0 impostorscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607060195 Same story as the RX refactor: pull TX LTB alloc out of open/close. ibmveth_alloc_tx_resources() / ibmveth_free_tx_resources() walk real_num_tx_queues so ethtool TX channel changes keep working. Hooked into open/close in the next patch. No MQ RX behaviour change — TX was already multi-queue capable via ethtool -L. This patch only tidies the open/close path ahead of the RX helper wiring in the next patch. Signed-off-by: Mingming Cao Reviewed-by: Dave Marquardt --- drivers/net/ethernet/ibm/ibmveth.c | 43 ++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/drivers/net/ethernet/ibm/ibmveth.c b/drivers/net/ethernet/ibm/ibmveth.c index b5ae979c1f82..63b0184c622a 100644 --- a/drivers/net/ethernet/ibm/ibmveth.c +++ b/drivers/net/ethernet/ibm/ibmveth.c @@ -1038,6 +1038,49 @@ static int ibmveth_allocate_tx_ltb(struct ibmveth_adapter *adapter, int idx) return 0; } +/** + * ibmveth_alloc_tx_resources - Allocate TX resources for all queues + * @adapter: ibmveth adapter structure + * + * Allocates TX Long Term Buffers (LTBs) for all TX queues. + * + * Return: 0 on success, -ENOMEM on failure + */ +static int __maybe_unused +ibmveth_alloc_tx_resources(struct ibmveth_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + int i; + + for (i = 0; i < netdev->real_num_tx_queues; i++) { + if (ibmveth_allocate_tx_ltb(adapter, i)) + goto err_free_ltbs; + } + + return 0; + +err_free_ltbs: + while (--i >= 0) + ibmveth_free_tx_ltb(adapter, i); + return -ENOMEM; +} + +/** + * ibmveth_free_tx_resources - Free TX resources for all queues + * @adapter: ibmveth adapter structure + * + * Frees TX Long Term Buffers (LTBs) for all TX queues. + */ +static void __maybe_unused +ibmveth_free_tx_resources(struct ibmveth_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + int i; + + for (i = 0; i < netdev->real_num_tx_queues; i++) + ibmveth_free_tx_ltb(adapter, i); +} + static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, union ibmveth_buf_desc rxq_desc, u64 mac_address) -- 2.39.3 (Apple Git-146)