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Mon, 1 Jul 2019 14:25:48 +0000 Received: from SL2P216MB0187.KORP216.PROD.OUTLOOK.COM ([fe80::9d2d:391f:5f49:c806]) by SL2P216MB0187.KORP216.PROD.OUTLOOK.COM ([fe80::9d2d:391f:5f49:c806%6]) with mapi id 15.20.2032.019; Mon, 1 Jul 2019 14:25:48 +0000 From: Nicholas Johnson To: "linux-kernel@vger.kernel.org" CC: "linux-pci@vger.kernel.org" , "bhelgaas@google.com" , "mika.westerberg@linux.intel.com" , "corbet@lwn.net" , "benh@kernel.crashing.org" , "logang@deltatee.com" Subject: [PATCH v7 7/8] PCI: Add hp_mmio_size and hp_mmio_pref_size parameters Thread-Topic: [PATCH v7 7/8] PCI: Add hp_mmio_size and hp_mmio_pref_size parameters Thread-Index: AQHVMBjgPnEXmKRAdkyaQ9Bk0tjoOA== Date: Mon, 1 Jul 2019 14:25:48 +0000 Message-ID: Accept-Language: en-AU, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: SY2PR01CA0023.ausprd01.prod.outlook.com (2603:10c6:1:14::35) To SL2P216MB0187.KORP216.PROD.OUTLOOK.COM (2603:1096:100:22::19) x-incomingtopheadermarker: OriginalChecksum:AE65CB97516F9CA21DE0B73C9B05FE76D3F4FA9FCB658CC5D90B5E881BEC7E44;UpperCasedChecksum:042D3BECB0325DD5AAA83456F8ADD61F76D8F27987928FBE04025CDB037C82AD;SizeAsReceived:7674;Count:47 x-ms-exchange-messagesentrepresentingtype: 1 x-tmn: [UsL19qhXSguCqt73BFCi48a1BfmMagVwg6Mu0jhLNObxiLKYBm95gG0AwyqxUeD2] x-microsoft-original-message-id: <20190701142533.GA5319@nicholas-usb> x-ms-publictraffictype: Email x-incomingheadercount: 47 x-eopattributedmessage: 0 x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(5050001)(7020095)(20181119110)(201702061078)(5061506573)(5061507331)(1603103135)(2017031320274)(2017031322404)(2017031323274)(2017031324274)(1601125500)(1603101475)(1701031045);SRVR:PU1APC01HT121; x-ms-traffictypediagnostic: PU1APC01HT121: x-microsoft-antispam-message-info: FQ7PuA0lGESrGAahg+nSWdPkRMgzaxX39fzbbj9fli0lek/DJu+r5kvSCOIHHiZ/QvQhrW6wPKKqAuJI0c+XeHnTQHNODW3PKZdLivl8R1WWSCpvxXV7pJPb09JRKY1Aw4Q48Cyfu4CLECSfzkjRdZ51bXnj0rEWPF+ccnuDjb8FT3YFGAqs7Xt5i+m4wuEO Content-ID: <268416731237D64B906E823ADB7DE961@KORP216.PROD.OUTLOOK.COM> MIME-Version: 1.0 X-OriginatorOrg: outlook.com X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-CrossTenant-Network-Message-Id: 538fa49c-ccc9-4dae-df53-08d6fe300319 X-MS-Exchange-CrossTenant-rms-persistedconsumerorg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-CrossTenant-originalarrivaltime: 01 Jul 2019 14:25:48.7039 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Internet X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-Transport-CrossTenantHeadersStamped: PU1APC01HT121 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add kernel parameter pci=hpmmiosize=nn[KMG] to set MMIO bridge window size for hotplug bridges. Add kernel parameter pci=hpmmioprefsize=nn[KMG] to set MMIO_PREF bridge window size for hotplug bridges. Leave pci=hpmemsize=nn[KMG] unchanged, to prevent disruptions to existing users. This sets both MMIO and MMIO_PREF to the same size. The two new parameters conform to the style of pci=hpiosize=nn[KMG]. Signed-off-by: Nicholas Johnson --- .../admin-guide/kernel-parameters.txt | 9 ++++++- drivers/pci/pci.c | 17 ++++++++++--- drivers/pci/setup-bus.c | 25 +++++++++++-------- include/linux/pci.h | 3 ++- 4 files changed, 38 insertions(+), 16 deletions(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 138f6664b..f3cda0b07 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -3438,8 +3438,15 @@ hpiosize=nn[KMG] The fixed amount of bus space which is reserved for hotplug bridge's IO window. Default size is 256 bytes. + hpmmiosize=nn[KMG] The fixed amount of bus space which is + reserved for hotplug bridge's MMIO window. + Default size is 2 megabytes. + hpmmioprefsize=nn[KMG] The fixed amount of bus space which is + reserved for hotplug bridge's MMIO_PREF window. + Default size is 2 megabytes. hpmemsize=nn[KMG] The fixed amount of bus space which is - reserved for hotplug bridge's memory window. + reserved for hotplug bridge's MMIO and + MMIO_PREF window. Default size is 2 megabytes. hpbussize=nn The minimum amount of additional bus numbers reserved for buses below a hotplug bridge. diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 8abc843b1..4ee1aaf5b 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -85,10 +85,12 @@ unsigned long pci_cardbus_io_size = DEFAULT_CARDBUS_IO_SIZE; unsigned long pci_cardbus_mem_size = DEFAULT_CARDBUS_MEM_SIZE; #define DEFAULT_HOTPLUG_IO_SIZE (256) -#define DEFAULT_HOTPLUG_MEM_SIZE (2*1024*1024) +#define DEFAULT_HOTPLUG_MMIO_SIZE (2*1024*1024) +#define DEFAULT_HOTPLUG_MMIO_PREF_SIZE (2*1024*1024) /* pci=hpmemsize=nnM,hpiosize=nn can override this */ unsigned long pci_hotplug_io_size = DEFAULT_HOTPLUG_IO_SIZE; -unsigned long pci_hotplug_mem_size = DEFAULT_HOTPLUG_MEM_SIZE; +unsigned long pci_hotplug_mmio_size = DEFAULT_HOTPLUG_MMIO_SIZE; +unsigned long pci_hotplug_mmio_pref_size = DEFAULT_HOTPLUG_MMIO_PREF_SIZE; #define DEFAULT_HOTPLUG_BUS_SIZE 1 unsigned long pci_hotplug_bus_size = DEFAULT_HOTPLUG_BUS_SIZE; @@ -6231,8 +6233,17 @@ static int __init pci_setup(char *str) pcie_ecrc_get_policy(str + 5); } else if (!strncmp(str, "hpiosize=", 9)) { pci_hotplug_io_size = memparse(str + 9, &str); + } else if (!strncmp(str, "hpmmiosize=", 11)) { + pci_hotplug_mmio_size = + memparse(str + 11, &str); + } else if (!strncmp(str, "hpmmioprefsize=", 15)) { + pci_hotplug_mmio_pref_size = + memparse(str + 15, &str); } else if (!strncmp(str, "hpmemsize=", 10)) { - pci_hotplug_mem_size = memparse(str + 10, &str); + pci_hotplug_mmio_size = + memparse(str + 10, &str); + pci_hotplug_mmio_pref_size = + memparse(str + 10, &str); } else if (!strncmp(str, "hpbussize=", 10)) { pci_hotplug_bus_size = simple_strtoul(str + 10, &str, 0); diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index 9064fd964..873df5482 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -1178,7 +1178,8 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head) { struct pci_dev *dev; unsigned long mask, prefmask, type2 = 0, type3 = 0; - resource_size_t additional_mem_size = 0, additional_io_size = 0; + resource_size_t additional_io_size = 0, additional_mmio_size = 0, + additional_mmio_pref_size = 0; struct resource *b_res; int ret; @@ -1212,7 +1213,8 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head) pci_bridge_check_ranges(bus); if (bus->self->is_hotplug_bridge) { additional_io_size = pci_hotplug_io_size; - additional_mem_size = pci_hotplug_mem_size; + additional_mmio_size = pci_hotplug_mmio_size; + additional_mmio_pref_size = pci_hotplug_mmio_pref_size; } /* Fall through */ default: @@ -1230,9 +1232,9 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head) if (b_res[2].flags & IORESOURCE_MEM_64) { prefmask |= IORESOURCE_MEM_64; ret = pbus_size_mem(bus, prefmask, prefmask, - prefmask, prefmask, - realloc_head ? 0 : additional_mem_size, - additional_mem_size, realloc_head); + prefmask, prefmask, + realloc_head ? 0 : additional_mmio_pref_size, + additional_mmio_pref_size, realloc_head); /* * If successful, all non-prefetchable resources @@ -1254,9 +1256,9 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head) if (!type2) { prefmask &= ~IORESOURCE_MEM_64; ret = pbus_size_mem(bus, prefmask, prefmask, - prefmask, prefmask, - realloc_head ? 0 : additional_mem_size, - additional_mem_size, realloc_head); + prefmask, prefmask, + realloc_head ? 0 : additional_mmio_pref_size, + additional_mmio_pref_size, realloc_head); /* * If successful, only non-prefetchable resources @@ -1265,7 +1267,8 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head) if (ret == 0) mask = prefmask; else - additional_mem_size += additional_mem_size; + additional_mmio_size += + additional_mmio_pref_size; type2 = type3 = IORESOURCE_MEM; } @@ -1285,8 +1288,8 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head) * prefetchable resource in a 64-bit prefetchable window. */ pbus_size_mem(bus, mask, IORESOURCE_MEM, type2, type3, - realloc_head ? 0 : additional_mem_size, - additional_mem_size, realloc_head); + realloc_head ? 0 : additional_mmio_size, + additional_mmio_size, realloc_head); break; } } diff --git a/include/linux/pci.h b/include/linux/pci.h index dd436da7e..e9641a127 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1973,7 +1973,8 @@ extern u8 pci_dfl_cache_line_size; extern u8 pci_cache_line_size; extern unsigned long pci_hotplug_io_size; -extern unsigned long pci_hotplug_mem_size; +extern unsigned long pci_hotplug_mmio_size; +extern unsigned long pci_hotplug_mmio_pref_size; extern unsigned long pci_hotplug_bus_size; /* Architecture-specific versions may override these (weak) */