From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3029E55C1A4 for ; Thu, 15 Oct 2026 18:55:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792090531; cv=none; b=TPg+J9ovLK/TBE1IjM1sedvfxT7YHY5+3c5QVwPJ2ILUTKLIIisUUS850rQZnXacFkhl7hWGPJV4Rgg+zIgidoZ+M32DYRlLVNU56MufAtf4/kQDX+Ho3S3K66vo/NmSF/AkdKPSj2e6c57BJHZgBrW/XYsUA23La/61xyFcoIQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792090531; c=relaxed/simple; bh=uCFe9ZHTSiGZk59zD17DaLB9M5jijws+3lD/CEq7C/Q=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cR6QdfQkUH8cqASBlehXIWaf4+I/AZuzn+TpIijarcR4YBh6NQCpYOCsDNhiMyCZqTguHTVMpYcDUucW7JmSKaonOjfmMBxYExpzGkqW/eWxVDlqkkJSXV5vloAREfI6a23h675+NgxFBPHRF55Ffe7/ARFVS36GHaeDVufyICM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=UU8MoWgv; arc=none smtp.client-ip=198.175.65.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="UU8MoWgv" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1792090520; x=1823626520; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=uCFe9ZHTSiGZk59zD17DaLB9M5jijws+3lD/CEq7C/Q=; b=UU8MoWgv6NJPNTxKple99H4swYOuA/0XO1GzcPZRpxUKbvmOb5GL/JqJ HcWqxxcAooBauvD9KOV7w8AaOBAvEjM7KBc4UKiuywvUi08eLgb/6XJMZ iRozqB1lYV+61ORQwjTuM0PJJQLP+bJPyZ9nBv7xi1z1gBLus+j0k7+fh PQHTEvZ5Py3UYadDCEsP56GTllzDVLkpRFJTzwYC4N6Yy10zCkYGyzqNA 5ajOLAYCxRA6AsZYid+LafvpFIxuj7pbDVWXmURfcOeRc77LPLlZrmN0Y zZqbn5+cDipkBQcIacFobTmbDHT+L8YqFjrXzilIn5Z906d3eWuYAocVC w==; X-CSE-ConnectionGUID: G+xvZfUxQLuWkEvk7Sz2ng== X-CSE-MsgGUID: qj35sV6SRIi0XfDoez7cEQ== X-IronPort-AV: E=McAfee;i="6800,10657,11936"; a="757945" X-IronPort-AV: E=Sophos;i="6.27,160,1787036400"; d="scan'208";a="757945" Received: from fmviesa001.fm.intel.com ([10.60.135.141]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Oct 2026 11:55:18 -0700 X-CSE-ConnectionGUID: osOUf2N5TaOu60+P/UTevw== X-CSE-MsgGUID: gnwTnTEbSp6w/AFC+afQEQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,160,1787036400"; d="scan'208";a="2003142" Received: from irvmail002.ir.intel.com ([10.43.11.120]) by fmviesa001.fm.intel.com with ESMTP; 15 Oct 2026 11:55:12 -0700 Received: from pkitszel-desk.tendawifi.com (unknown [10.245.244.208]) by irvmail002.ir.intel.com (Postfix) with ESMTP id D84C232EC6; Thu, 15 Oct 2026 19:55:07 +0100 (IST) From: Przemek Kitszel To: netdev@vger.kernel.org Cc: Tony Nguyen , Aleksandr Loktionov , Michal Schmidt , Jakub Kicinski , edumazet@kernel.org, horms@kernel.org, pabeni@redhat.com, davem@davemloft.net, Jiri Pirko , Jonathan Corbet , skhan@linuxfoundation.org, rdunlap@infradead.org, andrew+netdev@lunn.ch, saeedm@nvidia.com, tariqt@nvidia.com, leon@kernel.org, mbloch@nvidia.com, jacob.e.keller@intel.com, jedrzej.jagielski@intel.com, anzaki@gmail.com, brett.creeley@amd.com, jtornosm@redhat.com, ohartoov@nvidia.com, Przemek Kitszel , Sergey Temerkhanov , Grzegorz Nitka Subject: [PATCH net-next v3 02/15] ice: use shared devlink to store ice_adapters instead of custom xarray Date: Thu, 15 Oct 2026 20:51:13 +0200 Message-ID: <20261015185454.6332-3-przemyslaw.kitszel@intel.com> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20261015185454.6332-1-przemyslaw.kitszel@intel.com> References: <20261015185454.6332-1-przemyslaw.kitszel@intel.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Refactor our storage and deduplication logic of ice_adapters by moving it to be handled by shared devlink instance, recently added by Jiri Pirko [1]. We wanted the devlink instance for whole device anyway - later in the series I will add devlink resources under it. Make the shared devlink a parent (wrt. nesting) of the actual PF devices. [1] commit 411ad0605875 ("Merge branch 'devlink-introduce-shared-devlink-instance-for-pfs-on-same-chip'") [1] https://lore.kernel.org/all/20260312100407.551173-1-jiri@resnulli.us Reviewed-by: Jedrzej Jagielski Reviewed-by: Aleksandr Loktionov Signed-off-by: Przemek Kitszel --- CC: Sergey Temerkhanov CC: Grzegorz Nitka v2: * propagate the error from devlink_shd_get() with ERR_CAST() * minor kdoc updates * check devl_nested_devlink_set() return value, ice_devlink_register() returns int now (Sashiko) * prefix the shared devlink id with "ice:", to avoid collisions with ids used by other drivers (Sashiko) Sashiko suggestions I don't want to apply: S: all PFs without DSN get index 0, and so share one instance me: pre-existing, and DSN 0 is only on pre-production samples --- .../net/ethernet/intel/ice/devlink/devlink.h | 2 +- drivers/net/ethernet/intel/ice/ice_adapter.h | 12 +-- .../net/ethernet/intel/ice/devlink/devlink.c | 11 ++- drivers/net/ethernet/intel/ice/ice_adapter.c | 99 ++++++------------- drivers/net/ethernet/intel/ice/ice_main.c | 11 ++- 5 files changed, 57 insertions(+), 78 deletions(-) diff --git a/drivers/net/ethernet/intel/ice/devlink/devlink.h b/drivers/net/ethernet/intel/ice/devlink/devlink.h index 1af3b0763fbb..62af38d11fd9 100644 --- a/drivers/net/ethernet/intel/ice/devlink/devlink.h +++ b/drivers/net/ethernet/intel/ice/devlink/devlink.h @@ -7,7 +7,7 @@ struct ice_pf *ice_allocate_pf(struct device *dev); struct ice_sf_priv *ice_allocate_sf(struct device *dev, struct ice_pf *pf); -void ice_devlink_register(struct ice_pf *pf); +int ice_devlink_register(struct ice_pf *pf); void ice_devlink_unregister(struct ice_pf *pf); int ice_devlink_register_params(struct ice_pf *pf); void ice_devlink_unregister_params(struct ice_pf *pf); diff --git a/drivers/net/ethernet/intel/ice/ice_adapter.h b/drivers/net/ethernet/intel/ice/ice_adapter.h index 4f695f32da3d..c11d511d7a8e 100644 --- a/drivers/net/ethernet/intel/ice/ice_adapter.h +++ b/drivers/net/ethernet/intel/ice/ice_adapter.h @@ -7,7 +7,8 @@ #include #include #include -#include + +#include #include "ice_type.h" @@ -30,31 +31,30 @@ struct ice_port_list { /** * struct ice_adapter - PCI adapter resources shared across PFs - * @refcount: Reference count. struct ice_pf objects hold the references. + * @devlink: ice adapter's devlink (whole dev devlink) * @ptp_gltsyn_time_lock: Spinlock protecting access to the GLTSYN_TIME * register of the PTP clock. * @txq_ctx_lock: Spinlock protecting access to the GLCOMM_QTX_CNTX_CTL register * @cpi_phy_lock: Per-PHY mutex serializing CPI REQ/ACK transactions. * Index 0 = PHY0, index 1 = PHY1. Used on E825C devices. * @ctrl_pf: Control PF of the adapter * @ports: Ports list - * @index: 64-bit index cached for collision detection on 32bit systems */ struct ice_adapter { - refcount_t refcount; + struct devlink *devlink; + /* For access to the GLTSYN_TIME register */ spinlock_t ptp_gltsyn_time_lock; /* For access to GLCOMM_QTX_CNTX_CTL register */ spinlock_t txq_ctx_lock; /* Serialize CPI REQ/ACK transactions per PHY (E825C only) */ struct mutex cpi_phy_lock[ICE_E825_MAX_PHYS]; struct ice_pf *ctrl_pf; struct ice_port_list ports; - u64 index; }; struct ice_adapter *ice_adapter_get(struct pci_dev *pdev); -void ice_adapter_put(struct pci_dev *pdev); +void ice_adapter_put(struct ice_adapter *adapter); #endif /* _ICE_ADAPTER_H */ diff --git a/drivers/net/ethernet/intel/ice/devlink/devlink.c b/drivers/net/ethernet/intel/ice/devlink/devlink.c index 8c2b63eef82b..fa64b9744779 100644 --- a/drivers/net/ethernet/intel/ice/devlink/devlink.c +++ b/drivers/net/ethernet/intel/ice/devlink/devlink.c @@ -1747,11 +1747,20 @@ struct ice_sf_priv *ice_allocate_sf(struct device *dev, struct ice_pf *pf) * * Return: zero on success or an error code on failure. */ -void ice_devlink_register(struct ice_pf *pf) +int ice_devlink_register(struct ice_pf *pf) { struct devlink *devlink = priv_to_devlink(pf); + struct ice_adapter *adapter = pf->adapter; + int err; + if (adapter) { + err = devl_nested_devlink_set(adapter->devlink, devlink); + if (err) + return err; + } devl_register(devlink); + + return 0; } /** diff --git a/drivers/net/ethernet/intel/ice/ice_adapter.c b/drivers/net/ethernet/intel/ice/ice_adapter.c index 2dc3629d6d0f..c6301341ccae 100644 --- a/drivers/net/ethernet/intel/ice/ice_adapter.c +++ b/drivers/net/ethernet/intel/ice/ice_adapter.c @@ -1,18 +1,13 @@ // SPDX-License-Identifier: GPL-2.0-only // SPDX-FileCopyrightText: Copyright Red Hat -#include -#include #include #include #include -#include + #include "ice_adapter.h" #include "ice.h" -static DEFINE_XARRAY(ice_adapters); -static DEFINE_MUTEX(ice_adapters_mutex); - #define ICE_ADAPTER_FIXED_INDEX BIT_ULL(63) #define ICE_ADAPTER_INDEX_E825C \ @@ -40,48 +35,40 @@ static u64 ice_adapter_index(struct pci_dev *pdev) } } -static unsigned long ice_adapter_xa_index(struct pci_dev *pdev) -{ - u64 index = ice_adapter_index(pdev); - -#if BITS_PER_LONG == 64 - return index; -#else - return (u32)index ^ (u32)(index >> 32); -#endif -} - -static struct ice_adapter *ice_adapter_new(struct pci_dev *pdev) +static int ice_adapter_init(void *priv, void *init_param) { - struct ice_adapter *adapter; + struct ice_adapter *adapter = priv; + struct devlink *devlink; - adapter = kzalloc_obj(*adapter); - if (!adapter) - return NULL; + devlink = shd_priv_to_devlink(adapter); + adapter->devlink = devlink; - adapter->index = ice_adapter_index(pdev); spin_lock_init(&adapter->ptp_gltsyn_time_lock); spin_lock_init(&adapter->txq_ctx_lock); for (int i = 0; i < ARRAY_SIZE(adapter->cpi_phy_lock); i++) mutex_init(&adapter->cpi_phy_lock[i]); - refcount_set(&adapter->refcount, 1); mutex_init(&adapter->ports.lock); INIT_LIST_HEAD(&adapter->ports.ports); - return adapter; + return 0; } -static void ice_adapter_free(struct ice_adapter *adapter) +static void ice_adapter_fini(void *priv) { + struct ice_adapter *adapter = priv; + WARN_ON(!list_empty(&adapter->ports.ports)); for (int i = 0; i < ARRAY_SIZE(adapter->cpi_phy_lock); i++) mutex_destroy(&adapter->cpi_phy_lock[i]); mutex_destroy(&adapter->ports.lock); - - kfree(adapter); } +static const struct devlink_ops ice_adapter_devlink_ops = { + .shd_init = ice_adapter_init, + .shd_fini = ice_adapter_fini, +}; + /** * ice_adapter_get - Get a shared ice_adapter structure. * @pdev: Pointer to the pci_dev whose driver is getting the ice_adapter. @@ -93,59 +80,37 @@ static void ice_adapter_free(struct ice_adapter *adapter) * * Context: Process, may sleep. * Return: Pointer to ice_adapter on success. - * ERR_PTR() on error. -ENOMEM is the only possible error. + * ERR_PTR() on error. */ struct ice_adapter *ice_adapter_get(struct pci_dev *pdev) { struct ice_adapter *adapter; - unsigned long index; - int err; - - index = ice_adapter_xa_index(pdev); - scoped_guard(mutex, &ice_adapters_mutex) { - adapter = xa_load(&ice_adapters, index); - if (adapter) { - refcount_inc(&adapter->refcount); - WARN_ON_ONCE(adapter->index != ice_adapter_index(pdev)); - return adapter; - } - err = xa_reserve(&ice_adapters, index, GFP_KERNEL); - if (err) - return ERR_PTR(err); - - adapter = ice_adapter_new(pdev); - if (!adapter) { - xa_release(&ice_adapters, index); - return ERR_PTR(-ENOMEM); - } - xa_store(&ice_adapters, index, adapter, GFP_KERNEL); - } + struct devlink *devlink; + char devlink_id[32]; + u64 index; + + index = ice_adapter_index(pdev); + snprintf(devlink_id, sizeof(devlink_id), "ice:%llx", index); + devlink = devlink_shd_get(devlink_id, &ice_adapter_devlink_ops, + sizeof(*adapter), NULL, pdev->dev.driver); + if (IS_ERR(devlink)) + return ERR_CAST(devlink); + + adapter = devlink_shd_get_priv(devlink); + return adapter; } /** * ice_adapter_put - Release a reference to the shared ice_adapter structure. - * @pdev: Pointer to the pci_dev whose driver is releasing the ice_adapter. + * @adapter: the ice_adapter to release reference to * * Releases the reference to ice_adapter previously obtained with * ice_adapter_get. * * Context: Process, may sleep. */ -void ice_adapter_put(struct pci_dev *pdev) +void ice_adapter_put(struct ice_adapter *adapter) { - struct ice_adapter *adapter; - unsigned long index; - - index = ice_adapter_xa_index(pdev); - scoped_guard(mutex, &ice_adapters_mutex) { - adapter = xa_load(&ice_adapters, index); - if (WARN_ON(!adapter)) - return; - if (!refcount_dec_and_test(&adapter->refcount)) - return; - - WARN_ON(xa_erase(&ice_adapters, index) != adapter); - } - ice_adapter_free(adapter); + devlink_shd_put(adapter->devlink); } diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c index 454fba07d4ec..6373cd5ac288 100644 --- a/drivers/net/ethernet/intel/ice/ice_main.c +++ b/drivers/net/ethernet/intel/ice/ice_main.c @@ -4946,7 +4946,12 @@ static int ice_init_devlink(struct ice_pf *pf) return err; ice_devlink_init_regions(pf); - ice_devlink_register(pf); + err = ice_devlink_register(pf); + if (err) { + ice_devlink_destroy_regions(pf); + ice_devlink_unregister_params(pf); + return err; + } ice_health_init(pf); return 0; @@ -5291,7 +5296,7 @@ ice_probe(struct pci_dev *pdev, const struct pci_device_id __always_unused *ent) unroll_dev_init: need_dev_deinit = true; unroll_adapter: - ice_adapter_put(pdev); + ice_adapter_put(adapter); unroll_hw_init: ice_deinit_hw(hw); if (need_dev_deinit) @@ -5404,7 +5409,7 @@ static void ice_remove(struct pci_dev *pdev) ice_setup_mc_magic_wake(pf); ice_set_wake(pf); - ice_adapter_put(pdev); + ice_adapter_put(pf->adapter); ice_deinit_hw(&pf->hw); ice_deinit_dev(pf); -- 2.51.1