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Tue, 22 Oct 2019 20:35:10 +0000 From: "Ghannam, Yazen" To: "linux-edac@vger.kernel.org" CC: "Ghannam, Yazen" , "linux-kernel@vger.kernel.org" , "bp@alien8.de" Subject: [PATCH v2 2/6] EDAC/amd64: Gather hardware information early Thread-Topic: [PATCH v2 2/6] EDAC/amd64: Gather hardware information early Thread-Index: AQHViRgyyNCGlOIlVkadvQJY7cn6Hg== Date: Tue, 22 Oct 2019 20:35:10 +0000 Message-ID: <20191022203448.13962-3-Yazen.Ghannam@amd.com> References: <20191022203448.13962-1-Yazen.Ghannam@amd.com> In-Reply-To: <20191022203448.13962-1-Yazen.Ghannam@amd.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: SN4PR0501CA0024.namprd05.prod.outlook.com (2603:10b6:803:40::37) To BN7PR12MB2628.namprd12.prod.outlook.com (2603:10b6:408:30::20) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Yazen.Ghannam@amd.com; x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.17.1 x-originating-ip: [165.204.78.2] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: efb29278-b192-4660-c1df-08d7572f554c x-ms-traffictypediagnostic: BN7PR12MB2724: x-ms-exchange-purlcount: 1 x-ld-processed: 3dd8961f-e488-4e60-8e11-a82d994e183d,ExtAddr x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:2449; 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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: efb29278-b192-4660-c1df-08d7572f554c X-MS-Exchange-CrossTenant-originalarrivaltime: 22 Oct 2019 20:35:10.4776 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: MaVaM5ejpgYkX08b6Pt2IncqNlCTSUcetya0+6tZPuM59L1dZIcGm/GzZsthEFtWcQ/Osvu3u7J5rxNWOm7aUA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN7PR12MB2724 Sender: linux-edac-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org From: Yazen Ghannam Split out gathering hardware information from init_one_instance() into a separate function hw_info_get(). This is necessary so that the information can be cached earlier and used to check if memory is populated and if ECC is enabled on a node. Also, define a function hw_info_put() to back out changes made in hw_info_get(). Currently, this includes two actions: freeing reserved PCI device siblings and freeing the allocated struct amd64_umc. Check for an allocated PCI device (Function 0 for Family 17h or Function 1 for pre-Family 17h) before freeing, since hw_info_put() may be called before PCI siblings are reserved. Drop the family check when freeing pvt->umc. This will be NULL on pre-Family 17h systems. However, kfree() is safe and will check for a NULL pointer before freeing. Signed-off-by: Yazen Ghannam --- Link: https://lkml.kernel.org/r/20191018153114.39378-3-Yazen.Ghannam@amd.com v1 -> v2: * Change get_hardware_info() to hw_info_get(). * Add hw_info_put() to backout changes from hw_info_get(). rfc -> v1: * Fixup after making struct amd64_family_type fam_type global. drivers/edac/amd64_edac.c | 101 +++++++++++++++++++------------------- 1 file changed, 51 insertions(+), 50 deletions(-) diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c index b9a712819c68..df7dd9604bb2 100644 --- a/drivers/edac/amd64_edac.c +++ b/drivers/edac/amd64_edac.c @@ -3416,34 +3416,15 @@ static void compute_num_umcs(void) edac_dbg(1, "Number of UMCs: %x", num_umcs); } =20 -static int init_one_instance(unsigned int nid) +static int hw_info_get(struct amd64_pvt *pvt) { - struct pci_dev *F3 =3D node_to_amd_nb(nid)->misc; - struct mem_ctl_info *mci =3D NULL; - struct edac_mc_layer layers[2]; - struct amd64_pvt *pvt =3D NULL; u16 pci_id1, pci_id2; - int err =3D 0, ret; - - ret =3D -ENOMEM; - pvt =3D kzalloc(sizeof(struct amd64_pvt), GFP_KERNEL); - if (!pvt) - goto err_ret; - - pvt->mc_node_id =3D nid; - pvt->F3 =3D F3; - - ret =3D -EINVAL; - fam_type =3D per_family_init(pvt); - if (!fam_type) - goto err_free; + int ret =3D -EINVAL; =20 if (pvt->fam >=3D 0x17) { pvt->umc =3D kcalloc(num_umcs, sizeof(struct amd64_umc), GFP_KERNEL); - if (!pvt->umc) { - ret =3D -ENOMEM; - goto err_free; - } + if (!pvt->umc) + return -ENOMEM; =20 pci_id1 =3D fam_type->f0_id; pci_id2 =3D fam_type->f6_id; @@ -3452,21 +3433,37 @@ static int init_one_instance(unsigned int nid) pci_id2 =3D fam_type->f2_id; } =20 - err =3D reserve_mc_sibling_devs(pvt, pci_id1, pci_id2); - if (err) - goto err_post_init; + ret =3D reserve_mc_sibling_devs(pvt, pci_id1, pci_id2); + if (ret) + return ret; =20 read_mc_regs(pvt); =20 + return 0; +} + +static void hw_info_put(struct amd64_pvt *pvt) +{ + if (pvt->F0 || pvt->F1) + free_mc_sibling_devs(pvt); + + kfree(pvt->umc); +} + +static int init_one_instance(struct amd64_pvt *pvt) +{ + struct mem_ctl_info *mci =3D NULL; + struct edac_mc_layer layers[2]; + int ret =3D -EINVAL; + /* * We need to determine how many memory channels there are. Then use * that information for calculating the size of the dynamic instance * tables in the 'mci' structure. */ - ret =3D -EINVAL; pvt->channel_count =3D pvt->ops->early_channel_count(pvt); if (pvt->channel_count < 0) - goto err_siblings; + return ret; =20 ret =3D -ENOMEM; layers[0].type =3D EDAC_MC_LAYER_CHIP_SELECT; @@ -3488,9 +3485,9 @@ static int init_one_instance(unsigned int nid) layers[1].size =3D 2; layers[1].is_virt_csrow =3D false; =20 - mci =3D edac_mc_alloc(nid, ARRAY_SIZE(layers), layers, 0); + mci =3D edac_mc_alloc(pvt->mc_node_id, ARRAY_SIZE(layers), layers, 0); if (!mci) - goto err_siblings; + return ret; =20 mci->pvt_info =3D pvt; mci->pdev =3D &pvt->F3->dev; @@ -3503,31 +3500,17 @@ static int init_one_instance(unsigned int nid) ret =3D -ENODEV; if (edac_mc_add_mc_with_groups(mci, amd64_edac_attr_groups)) { edac_dbg(1, "failed edac_mc_add_mc()\n"); - goto err_add_mc; + edac_mc_free(mci); + return ret; } =20 return 0; - -err_add_mc: - edac_mc_free(mci); - -err_siblings: - free_mc_sibling_devs(pvt); - -err_post_init: - if (pvt->fam >=3D 0x17) - kfree(pvt->umc); - -err_free: - kfree(pvt); - -err_ret: - return ret; } =20 static int probe_one_instance(unsigned int nid) { struct pci_dev *F3 =3D node_to_amd_nb(nid)->misc; + struct amd64_pvt *pvt =3D NULL; struct ecc_settings *s; int ret; =20 @@ -3538,6 +3521,21 @@ static int probe_one_instance(unsigned int nid) =20 ecc_stngs[nid] =3D s; =20 + pvt =3D kzalloc(sizeof(struct amd64_pvt), GFP_KERNEL); + if (!pvt) + goto err_settings; + + pvt->mc_node_id =3D nid; + pvt->F3 =3D F3; + + fam_type =3D per_family_init(pvt); + if (!fam_type) + goto err_enable; + + ret =3D hw_info_get(pvt); + if (ret < 0) + goto err_enable; + if (!ecc_enabled(F3, nid)) { ret =3D 0; =20 @@ -3554,7 +3552,7 @@ static int probe_one_instance(unsigned int nid) goto err_enable; } =20 - ret =3D init_one_instance(nid); + ret =3D init_one_instance(pvt); if (ret < 0) { amd64_err("Error probing instance: %d\n", nid); =20 @@ -3567,6 +3565,10 @@ static int probe_one_instance(unsigned int nid) return ret; =20 err_enable: + hw_info_put(pvt); + kfree(pvt); + +err_settings: kfree(s); ecc_stngs[nid] =3D NULL; =20 @@ -3593,14 +3595,13 @@ static void remove_one_instance(unsigned int nid) =20 restore_ecc_error_reporting(s, nid, F3); =20 - free_mc_sibling_devs(pvt); - kfree(ecc_stngs[nid]); ecc_stngs[nid] =3D NULL; =20 /* Free the EDAC CORE resources */ mci->pvt_info =3D NULL; =20 + hw_info_put(pvt); kfree(pvt); edac_mc_free(mci); } --=20 2.17.1