From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 95C83364E89; Fri, 8 May 2026 22:12:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=13.77.154.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778278344; cv=none; b=lonYZX4q9dsV9wlcjtSdpdqkUrU5kKvkz1VsYsAL+JdmIwwlFESGk4tkYFeJzmlDloIaRu4jGMeUfZps4Mi1433lilNanmANLV5b2EEsYsMJu755HrU1f3bXqQCjTpA5ZGJFSIIGJ/S3o4srH/HvPE6Q2MgnZkuziuG2Bm0SJIE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778278344; c=relaxed/simple; bh=GQWWgUa6Y/obteMnPmDS0wilz4fdat+dLEgHNCc21rM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=auP8b7ReP3L+qAccGQZEVMhyW2Bi8AhmrNwLD6ywDC/rf5RqNA1Zv32RJ1Bsd9GdzU24ejBfPxs+gES8ikw6RaAghn/RHkcYt9aFscioRlknbbONov3HVFeRZLmY41dtYUVoyjQ6giS9+jgkpMLoZxh1pD5SRkbVH0HcAiJP3aI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microsoft.com; spf=pass smtp.mailfrom=linux.microsoft.com; arc=none smtp.client-ip=13.77.154.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microsoft.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.microsoft.com Received: by linux.microsoft.com (Postfix, from userid 1202) id 5D89620B716B; Fri, 8 May 2026 15:12:22 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 5D89620B716B From: Long Li To: Long Li , Konstantin Taranov , Jakub Kicinski , "David S . Miller" , Paolo Abeni , Eric Dumazet , Andrew Lunn , Jason Gunthorpe , Leon Romanovsky , Haiyang Zhang , "K . Y . Srinivasan" , Wei Liu , Dexuan Cui , shradhagupta@linux.microsoft.com Cc: Simon Horman , netdev@vger.kernel.org, linux-rdma@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next v8 5/6] net: mana: Allocate interrupt context for each EQ when creating vPort Date: Fri, 8 May 2026 15:12:01 -0700 Message-ID: <20260508221202.15725-6-longli@microsoft.com> X-Mailer: git-send-email 2.43.7 In-Reply-To: <20260508221202.15725-1-longli@microsoft.com> References: <20260508221202.15725-1-longli@microsoft.com> Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Use GIC functions to create a dedicated interrupt context or acquire a shared interrupt context for each EQ when setting up a vPort. The caller now owns the GIC reference across the EQ create/destroy lifecycle: mana_create_eq() calls mana_gd_get_gic() before creating each EQ and mana_destroy_eq() calls mana_gd_put_gic() after destroying it. The msix_index invalidation is moved from mana_gd_deregister_irq() to the mana_gd_create_eq() error path so that mana_destroy_eq() can read the index before teardown. Signed-off-by: Long Li --- .../net/ethernet/microsoft/mana/gdma_main.c | 2 +- drivers/net/ethernet/microsoft/mana/mana_en.c | 18 +++++++++++++++++- include/net/mana/gdma.h | 1 + 3 files changed, 19 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c index 3408bc1fd6ab..b70271a0624f 100644 --- a/drivers/net/ethernet/microsoft/mana/gdma_main.c +++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c @@ -857,7 +857,6 @@ static void mana_gd_deregister_irq(struct gdma_queue *queue) } spin_unlock_irqrestore(&gic->lock, flags); - queue->eq.msix_index = INVALID_PCI_MSIX_INDEX; synchronize_rcu(); } @@ -972,6 +971,7 @@ static int mana_gd_create_eq(struct gdma_dev *gd, out: dev_err(dev, "Failed to create EQ: %d\n", err); mana_gd_destroy_eq(gc, false, queue); + queue->eq.msix_index = INVALID_PCI_MSIX_INDEX; return err; } diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c index 3f6cdc2cd82d..42fd517e56d2 100644 --- a/drivers/net/ethernet/microsoft/mana/mana_en.c +++ b/drivers/net/ethernet/microsoft/mana/mana_en.c @@ -1626,6 +1626,7 @@ void mana_destroy_eq(struct mana_port_context *apc) struct gdma_context *gc = ac->gdma_dev->gdma_context; struct gdma_queue *eq; int i; + unsigned int msi; if (!apc->eqs) return; @@ -1638,7 +1639,9 @@ void mana_destroy_eq(struct mana_port_context *apc) if (!eq) continue; + msi = eq->eq.msix_index; mana_gd_destroy_queue(gc, eq); + mana_gd_put_gic(gc, !gc->msi_sharing, msi); } kfree(apc->eqs); @@ -1655,6 +1658,7 @@ static void mana_create_eq_debugfs(struct mana_port_context *apc, int i) eq.mana_eq_debugfs = debugfs_create_dir(eqnum, apc->mana_eqs_debugfs); debugfs_create_u32("head", 0400, eq.mana_eq_debugfs, &eq.eq->head); debugfs_create_u32("tail", 0400, eq.mana_eq_debugfs, &eq.eq->tail); + debugfs_create_u32("irq", 0400, eq.mana_eq_debugfs, &eq.eq->eq.irq); debugfs_create_file("eq_dump", 0400, eq.mana_eq_debugfs, eq.eq, &mana_dbg_q_fops); } @@ -1665,6 +1669,8 @@ int mana_create_eq(struct mana_port_context *apc) struct gdma_queue_spec spec = {}; int err; int i; + int msi; + struct gdma_irq_context *gic; WARN_ON(apc->eqs); apc->eqs = kzalloc_objs(struct mana_eq, apc->num_queues); @@ -1682,12 +1688,22 @@ int mana_create_eq(struct mana_port_context *apc) debugfs_create_dir("EQs", apc->mana_port_debugfs); for (i = 0; i < apc->num_queues; i++) { - spec.eq.msix_index = (i + 1) % gc->num_msix_usable; + msi = (i + 1) % gc->num_msix_usable; + + gic = mana_gd_get_gic(gc, !gc->msi_sharing, &msi); + if (!gic) { + err = -ENOMEM; + goto out; + } + spec.eq.msix_index = msi; + err = mana_gd_create_mana_eq(gd, &spec, &apc->eqs[i].eq); if (err) { dev_err(gc->dev, "Failed to create EQ %d : %d\n", i, err); + mana_gd_put_gic(gc, !gc->msi_sharing, msi); goto out; } + apc->eqs[i].eq->eq.irq = gic->irq; mana_create_eq_debugfs(apc, i); } diff --git a/include/net/mana/gdma.h b/include/net/mana/gdma.h index fbe3c1427b45..6c138cc77407 100644 --- a/include/net/mana/gdma.h +++ b/include/net/mana/gdma.h @@ -342,6 +342,7 @@ struct gdma_queue { void *context; unsigned int msix_index; + unsigned int irq; u32 log2_throttle_limit; } eq; -- 2.43.0