From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-we0-x236.google.com ([2a00:1450:400c:c03::236]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XBkwt-0006Bu-2Z for barebox@lists.infradead.org; Mon, 28 Jul 2014 13:26:43 +0000 Received: by mail-we0-f182.google.com with SMTP id k48so7466301wev.27 for ; Mon, 28 Jul 2014 06:26:20 -0700 (PDT) From: Sebastian Hesselbarth Date: Mon, 28 Jul 2014 15:26:08 +0200 Message-Id: <1406553970-18157-4-git-send-email-sebastian.hesselbarth@gmail.com> In-Reply-To: <1406553970-18157-1-git-send-email-sebastian.hesselbarth@gmail.com> References: <1406107568-8440-1-git-send-email-sebastian.hesselbarth@gmail.com> <1406553970-18157-1-git-send-email-sebastian.hesselbarth@gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v2 3/5] pci: set auto-incremented bus number To: Sebastian Hesselbarth , Sascha Hauer Cc: Thomas Petazzoni , barebox@lists.infradead.org When using more than one PCI bus, we have to assign unique numbers to each bus. Use an auto-incremented bus index and assign it to each registered bus. Also, allow the PCI host controller to update internal registers by calling set_busno with assigned bus number. While at it, add pci_controller struct to set_busno callback, add a back reference to pci_controller to pci_bus, and clean up unused left-overs from Linux import. Signed-off-by: Sebastian Hesselbarth --- Changelog: v1->v2: - set pci_controller reference to bus->bus (Suggested by Lucas Stach) - auto-increment pci_bus number for each registered bus - call pci_controller set_busno() before pci_scan_bus - remove sysdata and proc_dir_entry from pci_dev and pci_bus - pass pci_controller to set_busno callback Cc: barebox@lists.infradead.org Cc: Antony Pavlov Cc: Jean-Christophe PLAGNIOL-VILLARD Cc: Lucas Stach Cc: Thomas Petazzoni Cc: Ezequiel Garcia --- drivers/pci/pci.c | 5 +++++ include/linux/pci.h | 12 +++--------- 2 files changed, 8 insertions(+), 9 deletions(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 501a36cc8356..2dafaf8d6bab 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -11,6 +11,7 @@ static struct pci_controller *hose_head, **hose_tail = &hose_head; LIST_HEAD(pci_root_buses); EXPORT_SYMBOL(pci_root_buses); +static u8 bus_index; static struct pci_bus *pci_alloc_bus(void) { @@ -36,10 +37,14 @@ void register_pci_controller(struct pci_controller *hose) bus = pci_alloc_bus(); hose->bus = bus; + bus->host = hose; bus->ops = hose->pci_ops; bus->resource[0] = hose->mem_resource; bus->resource[1] = hose->io_resource; + bus->number = bus_index++; + if (hose->set_busno) + hose->set_busno(hose, bus->number); pci_scan_bus(bus); list_add_tail(&bus->node, &pci_root_buses); diff --git a/include/linux/pci.h b/include/linux/pci.h index 6caed01c9939..0ec1320b2f71 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -91,9 +91,6 @@ struct pci_dev { struct list_head bus_list; /* node in per-bus list */ struct pci_bus *bus; /* bus this device is on */ struct pci_bus *subordinate; /* bus this device bridges to */ - - void *sysdata; /* hook for sys-specific extension */ - struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */ struct pci_slot *slot; /* Physical slot this device is in */ struct device_d dev; @@ -118,6 +115,7 @@ struct pci_dev { #define to_pci_dev(dev) container_of(dev, struct pci_dev, dev) struct pci_bus { + struct pci_controller *host; /* associated host controller */ struct list_head node; /* node in list of buses */ struct list_head children; /* list of child buses */ struct list_head devices; /* list of devices on this bus */ @@ -126,8 +124,6 @@ struct pci_bus { struct list_head resources; /* address space routed to this bus */ struct pci_ops *ops; /* configuration access functions */ - void *sysdata; /* hook for sys-specific extension */ - struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */ unsigned char number; /* bus number */ unsigned char primary; /* number of primary bridge */ @@ -167,10 +163,8 @@ struct pci_controller { unsigned int index; - /* Optional access methods for reading/writing the bus number - of the PCI controller */ - int (*get_busno)(void); - void (*set_busno)(int busno); + /* Optional access method for writing the bus number */ + void (*set_busno)(struct pci_controller *host, int busno); }; struct pci_driver { -- 2.0.0 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox