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 623D93DD51C; Thu, 30 Apr 2026 07:53:45 +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=1777535627; cv=none; b=LMv9ik6WOGr9mnLSPVLD8mPERebpBhq/ZheVlPwlWZ1T71lyoymUwwMf4jCGS2QyOtAefIBvLIsFgqw+BpiOQuS77CYIaZtj81aYgsQZFxlxAIpLhGiWLYnpU5TMbhGLMAuox5MFdZsHapLSSk7SX5ff8Xvg3G7788JrBhnC72Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777535627; c=relaxed/simple; bh=nHywTWr+8QtLczlfsmPn1VbJG7y62oUCoJemGUcqPG4=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=duv1DdEdha+tSMIfClIqZXDKHaRJrwI6Ih0SUTKLMfjy1/aT8VMJ52V2MI31HsjX3RRWvcCENhRuJry2EEXwURmGJVbE6f3j8kq2EvGvJti35gk6iYiHBYGHiD03/iC/2RzsClxqn5ePZhupUSoh2T7UnTrz3vaAR1z1VakPpfc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com; spf=pass smtp.mailfrom=linux.microsoft.com; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b=T7csd3ZJ; arc=none smtp.client-ip=13.77.154.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="T7csd3ZJ" Received: by linux.microsoft.com (Postfix, from userid 1173) id 7F65820B7170; Thu, 30 Apr 2026 00:53:45 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 7F65820B7170 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1777535625; bh=X0Oi1tof/4hxSNf94fwA6U1oVzYaEqD7GPSMm5xhLuU=; h=From:To:Subject:Date:From; b=T7csd3ZJLvTkcVi3l8jhNEs6ZJzHAECDEVpTpH70CHEZ3w1F7WJdScp4p/2SLUmTk Gv6gMMWN0OFQMhU0DM39B/ipwkBWShZNx8cVWoOgJLBud5SkwP0TsR15+Gd+ShgtNI f85Nrnubb6XJ4Jl43iAAz/2lBmki0OdksggNnkSM= From: Erni Sri Satya Vennela To: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, longli@microsoft.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, kotaranov@microsoft.com, horms@kernel.org, shradhagupta@linux.microsoft.com, ernis@linux.microsoft.com, dipayanroy@linux.microsoft.com, yury.norov@gmail.com, shirazsaleem@microsoft.com, kees@kernel.org, linux-hyperv@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org Subject: [PATCH net-next v7] net: mana: Expose hardware diagnostic info via debugfs Date: Thu, 30 Apr 2026 00:53:29 -0700 Message-ID: <20260430075342.1871554-1-ernis@linux.microsoft.com> X-Mailer: git-send-email 2.43.7 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add debugfs entries to expose hardware configuration and diagnostic information that aids in debugging driver initialization and runtime operations without adding noise to dmesg. The debugfs directory for each PCI device is named using pci_name() (the unique BDF address), and its creation and removal is integrated into mana_gd_setup() and mana_gd_cleanup_device() respectively, so that all callers (probe, remove, suspend, resume, shutdown) share a single code path. Device-level entries (under /sys/kernel/debug/mana//): - num_msix_usable, max_num_queues: Max resources from hardware - gdma_protocol_ver, pf_cap_flags1: VF version negotiation results - num_vports, bm_hostmode: Device configuration Per-vPort entries (under /sys/kernel/debug/mana//vportN/): - port_handle: Hardware vPort handle - max_sq, max_rq: Max queues from vPort config - indir_table_sz: Indirection table size - steer_rx, steer_rss, steer_update_tab, steer_cqe_coalescing: Last applied steering configuration parameters Signed-off-by: Erni Sri Satya Vennela --- Changes in v7: * Rebase to latest main. Changes in v6: * Move out of patchset and create a separate patch. Changes in v5: * Update commit message. * Fix conflicts to align with the new patches. * Make it part of patchset. Changes in v4: * Rebase and fix conflicts. Changes in v3: * Rename mana_gd_cleanup to mana_gd_cleanup_device. * Add creation of debugfs entries in mana_gd_setup. * Add removal of debugfs entries in mana_gd_cleanup_device. * Remove bm_hostmode and num_vports from debugfs in mana_remove itself, because "ac" gets freed before debugfs_remove_recursive, to avoid Use-After-Free error. * Add "goto out:" in mana_cfg_vport_steering to avoid populating apc values when resp.hdr.status is not NULL. Changes in v2: * Add debugfs_remove_recursice for gc>mana_pci_debugfs in mana_gd_suspend to handle multiple duplicates creation in mana_gd_setup and mana_gd_resume path. * Move debugfs creation for num_vports and bm_hostmode out of if(!resuming) condition since we have to create it again even for resume. * Recreate mana_pci_debugfs in mana_gd_resume. --- .../net/ethernet/microsoft/mana/gdma_main.c | 68 +++++++++++-------- drivers/net/ethernet/microsoft/mana/mana_en.c | 33 +++++++++ include/net/mana/gdma.h | 1 + include/net/mana/mana.h | 8 +++ 4 files changed, 81 insertions(+), 29 deletions(-) diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c index 098fbda0d128..33fd7d9259c9 100644 --- a/drivers/net/ethernet/microsoft/mana/gdma_main.c +++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c @@ -194,6 +194,11 @@ static int mana_gd_query_max_resources(struct pci_dev *pdev) if (gc->max_num_queues > gc->num_msix_usable - 1) gc->max_num_queues = gc->num_msix_usable - 1; + debugfs_create_u32("num_msix_usable", 0400, gc->mana_pci_debugfs, + &gc->num_msix_usable); + debugfs_create_u32("max_num_queues", 0400, gc->mana_pci_debugfs, + &gc->max_num_queues); + return 0; } @@ -1264,6 +1269,13 @@ int mana_gd_verify_vf_version(struct pci_dev *pdev) return err ? err : -EPROTO; } gc->pf_cap_flags1 = resp.pf_cap_flags1; + gc->gdma_protocol_ver = resp.gdma_protocol_ver; + + debugfs_create_x64("gdma_protocol_ver", 0400, gc->mana_pci_debugfs, + &gc->gdma_protocol_ver); + debugfs_create_x64("pf_cap_flags1", 0400, gc->mana_pci_debugfs, + &gc->pf_cap_flags1); + if (resp.pf_cap_flags1 & GDMA_DRV_CAP_FLAG_1_HWC_TIMEOUT_RECONFIG) { err = mana_gd_query_hwc_timeout(pdev, &hwc->hwc_timeout); if (err) { @@ -1943,15 +1955,20 @@ static int mana_gd_setup(struct pci_dev *pdev) struct gdma_context *gc = pci_get_drvdata(pdev); int err; + gc->mana_pci_debugfs = debugfs_create_dir(pci_name(pdev), + mana_debugfs_root); + err = mana_gd_init_registers(pdev); if (err) - return err; + goto remove_debugfs; mana_smc_init(&gc->shm_channel, gc->dev, gc->shm_base); gc->service_wq = alloc_ordered_workqueue("gdma_service_wq", 0); - if (!gc->service_wq) - return -ENOMEM; + if (!gc->service_wq) { + err = -ENOMEM; + goto remove_debugfs; + } err = mana_gd_setup_hwc_irqs(pdev); if (err) { @@ -1992,11 +2009,14 @@ static int mana_gd_setup(struct pci_dev *pdev) free_workqueue: destroy_workqueue(gc->service_wq); gc->service_wq = NULL; +remove_debugfs: + debugfs_remove_recursive(gc->mana_pci_debugfs); + gc->mana_pci_debugfs = NULL; dev_err(&pdev->dev, "%s failed (error %d)\n", __func__, err); return err; } -static void mana_gd_cleanup(struct pci_dev *pdev) +static void mana_gd_cleanup_device(struct pci_dev *pdev) { struct gdma_context *gc = pci_get_drvdata(pdev); @@ -2008,6 +2028,10 @@ static void mana_gd_cleanup(struct pci_dev *pdev) destroy_workqueue(gc->service_wq); gc->service_wq = NULL; } + + debugfs_remove_recursive(gc->mana_pci_debugfs); + gc->mana_pci_debugfs = NULL; + dev_dbg(&pdev->dev, "mana gdma cleanup successful\n"); } @@ -2065,9 +2089,6 @@ static int mana_gd_probe(struct pci_dev *pdev, const struct pci_device_id *ent) gc->dev = &pdev->dev; xa_init(&gc->irq_contexts); - gc->mana_pci_debugfs = debugfs_create_dir(pci_name(pdev), - mana_debugfs_root); - err = mana_gd_setup(pdev); if (err) goto unmap_bar; @@ -2096,16 +2117,8 @@ static int mana_gd_probe(struct pci_dev *pdev, const struct pci_device_id *ent) cleanup_mana: mana_remove(&gc->mana, false); cleanup_gd: - mana_gd_cleanup(pdev); + mana_gd_cleanup_device(pdev); unmap_bar: - /* - * at this point we know that the other debugfs child dir/files - * are either not yet created or are already cleaned up. - * The pci debugfs folder clean-up now, will only be cleaning up - * adapter-MTU file and apc->mana_pci_debugfs folder. - */ - debugfs_remove_recursive(gc->mana_pci_debugfs); - gc->mana_pci_debugfs = NULL; xa_destroy(&gc->irq_contexts); pci_iounmap(pdev, bar0_va); free_gc: @@ -2155,11 +2168,7 @@ static void mana_gd_remove(struct pci_dev *pdev) mana_rdma_remove(&gc->mana_ib); mana_remove(&gc->mana, false); - mana_gd_cleanup(pdev); - - debugfs_remove_recursive(gc->mana_pci_debugfs); - - gc->mana_pci_debugfs = NULL; + mana_gd_cleanup_device(pdev); xa_destroy(&gc->irq_contexts); @@ -2181,7 +2190,7 @@ int mana_gd_suspend(struct pci_dev *pdev, pm_message_t state) mana_rdma_remove(&gc->mana_ib); mana_remove(&gc->mana, true); - mana_gd_cleanup(pdev); + mana_gd_cleanup_device(pdev); return 0; } @@ -2201,13 +2210,18 @@ int mana_gd_resume(struct pci_dev *pdev) err = mana_probe(&gc->mana, true); if (err) - return err; + goto cleanup_gd; err = mana_rdma_probe(&gc->mana_ib); if (err) - return err; + goto cleanup_mana; return 0; +cleanup_mana: + mana_remove(&gc->mana, true); +cleanup_gd: + mana_gd_cleanup_device(pdev); + return err; } /* Quiesce the device for kexec. This is also called upon reboot/shutdown. */ @@ -2220,11 +2234,7 @@ static void mana_gd_shutdown(struct pci_dev *pdev) mana_rdma_remove(&gc->mana_ib); mana_remove(&gc->mana, true); - mana_gd_cleanup(pdev); - - debugfs_remove_recursive(gc->mana_pci_debugfs); - - gc->mana_pci_debugfs = NULL; + mana_gd_cleanup_device(pdev); pci_disable_device(pdev); } diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c index a654b3699c4c..077d3a1ff6bf 100644 --- a/drivers/net/ethernet/microsoft/mana/mana_en.c +++ b/drivers/net/ethernet/microsoft/mana/mana_en.c @@ -1276,6 +1276,9 @@ static int mana_query_vport_cfg(struct mana_port_context *apc, u32 vport_index, apc->port_handle = resp.vport; ether_addr_copy(apc->mac_addr, resp.mac_addr); + apc->vport_max_sq = *max_sq; + apc->vport_max_rq = *max_rq; + return 0; } @@ -1430,6 +1433,11 @@ static int mana_cfg_vport_steering(struct mana_port_context *apc, netdev_info(ndev, "Configured steering vPort %llu entries %u\n", apc->port_handle, apc->indir_table_sz); + + apc->steer_rx = rx; + apc->steer_rss = apc->rss_state; + apc->steer_update_tab = update_tab; + apc->steer_cqe_coalescing = req->cqe_coalescing_enable; out: kfree(req); return err; @@ -3161,6 +3169,23 @@ static int mana_init_port(struct net_device *ndev) eth_hw_addr_set(ndev, apc->mac_addr); sprintf(vport, "vport%d", port_idx); apc->mana_port_debugfs = debugfs_create_dir(vport, gc->mana_pci_debugfs); + + debugfs_create_u64("port_handle", 0400, apc->mana_port_debugfs, + &apc->port_handle); + debugfs_create_u32("max_sq", 0400, apc->mana_port_debugfs, + &apc->vport_max_sq); + debugfs_create_u32("max_rq", 0400, apc->mana_port_debugfs, + &apc->vport_max_rq); + debugfs_create_u32("indir_table_sz", 0400, apc->mana_port_debugfs, + &apc->indir_table_sz); + debugfs_create_u32("steer_rx", 0400, apc->mana_port_debugfs, + &apc->steer_rx); + debugfs_create_u32("steer_rss", 0400, apc->mana_port_debugfs, + &apc->steer_rss); + debugfs_create_u32("steer_update_tab", 0400, apc->mana_port_debugfs, + &apc->steer_update_tab); + debugfs_create_u32("steer_cqe_coalescing", 0400, apc->mana_port_debugfs, + &apc->steer_cqe_coalescing); debugfs_create_u32("current_speed", 0400, apc->mana_port_debugfs, &apc->speed); return 0; @@ -3659,6 +3684,11 @@ int mana_probe(struct gdma_dev *gd, bool resuming) ac->bm_hostmode = bm_hostmode; + debugfs_create_u16("num_vports", 0400, gc->mana_pci_debugfs, + &ac->num_ports); + debugfs_create_u8("bm_hostmode", 0400, gc->mana_pci_debugfs, + &ac->bm_hostmode); + if (!resuming) { ac->num_ports = num_ports; } else { @@ -3800,6 +3830,9 @@ void mana_remove(struct gdma_dev *gd, bool suspending) mana_gd_deregister_device(gd); + debugfs_lookup_and_remove("bm_hostmode", gc->mana_pci_debugfs); + debugfs_lookup_and_remove("num_vports", gc->mana_pci_debugfs); + if (suspending) return; diff --git a/include/net/mana/gdma.h b/include/net/mana/gdma.h index 6d836060976a..70d62bc32837 100644 --- a/include/net/mana/gdma.h +++ b/include/net/mana/gdma.h @@ -442,6 +442,7 @@ struct gdma_context { struct gdma_dev mana_ib; u64 pf_cap_flags1; + u64 gdma_protocol_ver; struct workqueue_struct *service_wq; diff --git a/include/net/mana/mana.h b/include/net/mana/mana.h index 8f721cd4e4a7..18215388d2c7 100644 --- a/include/net/mana/mana.h +++ b/include/net/mana/mana.h @@ -568,6 +568,14 @@ struct mana_port_context { /* Debugfs */ struct dentry *mana_port_debugfs; + + /* Cached vport/steering config for debugfs */ + u32 vport_max_sq; + u32 vport_max_rq; + u32 steer_rx; + u32 steer_rss; + u32 steer_update_tab; + u32 steer_cqe_coalescing; }; netdev_tx_t mana_start_xmit(struct sk_buff *skb, struct net_device *ndev); -- 2.43.0