From mboxrd@z Thu Jan 1 00:00:00 1970 From: Manish Jaggi Subject: RFC: [PATCH 1/3] Enhance platform support for PCI Date: Fri, 20 Feb 2015 17:04:54 +0530 Message-ID: <54E71BDE.5020106@caviumnetworks.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xen.org Cc: Prasun.kapoor@cavium.com, "Kumar, Vijaya" , Julien Grall , "Stefano Stabellini (Stefano.Stabellini@citrix.com)" , Ian Campbell List-Id: xen-devel@lists.xenproject.org The platform APIs are enhanced to provide support for parsing pci device tree nodes and storing the config-space address which is later used for pci_read/pci_write config calls. --- xen/arch/arm/platform.c | 27 +++++++++++++++++++++++++++ xen/include/asm-arm/platform.h | 18 +++++++++++++++++- 2 files changed, 44 insertions(+), 1 deletion(-) diff --git a/xen/arch/arm/platform.c b/xen/arch/arm/platform.c index cb4cda8..25f07d2 100644 --- a/xen/arch/arm/platform.c +++ b/xen/arch/arm/platform.c @@ -128,6 +128,33 @@ int __init platform_smp_init(void) } #endif +int platform_pci_dt_node_init(struct dt_device_node *node, const void *data) +{ + if(platform->pci_dt_node_init) + return platform->pci_dt_node_init(node, data); + return -1; +} + +int platform_pci_write_config(unsigned int seg, unsigned int bus, + unsigned int dev, unsigned int func, + int reg, int size, uint32_t val) +{ + if(platform->pci_write_config) + return platform->pci_write_config(seg, bus, dev, func, reg, size, val); + + return -1; +} + +int platform_pci_read_config(unsigned int seg, unsigned int bus, + unsigned int dev, unsigned int func, + int reg, int size, uint32_t *val) +{ + if(platform->pci_read_config) + return platform->pci_read_config(seg, bus, dev, func, reg, size, val); + + return -1; +} + void platform_reset(void) { if ( platform && platform->reset ) diff --git a/xen/include/asm-arm/platform.h b/xen/include/asm-arm/platform.h index eefaca6..da3cc63 100644 --- a/xen/include/asm-arm/platform.h +++ b/xen/include/asm-arm/platform.h @@ -26,6 +26,16 @@ struct platform_desc { void (*reset)(void); /* Platform power-off */ void (*poweroff)(void); + /* PCI callback when a pci device tree node is found */ + int (*pci_dt_node_init)(struct dt_device_node *node, const void *data); + /* PCI configspace read and write */ + int (*pci_read_config)(unsigned int seg, unsigned int bus, + unsigned int dev, unsigned int func, + int reg, int size, uint32_t *val); + + int (*pci_write_config)(unsigned int seg, unsigned int bus, + unsigned int dev, unsigned int func, + int reg, int size, uint32_t val); /* * Platform quirks * Defined has a function because a platform can support multiple @@ -73,7 +83,13 @@ bool_t platform_has_quirk(uint32_t quirk); bool_t platform_device_is_blacklisted(const struct dt_device_node *node); unsigned int platform_dom0_evtchn_ppi(void); void platform_dom0_gnttab(paddr_t *start, paddr_t *size); - +int platform_pci_dt_node_init(struct dt_device_node *node, const void *data); +int platform_pci_write_config(unsigned int seg, unsigned int bus, + unsigned int dev, unsigned int func, + int reg, int size, uint32_t val); +int platform_pci_read_config(unsigned int seg, unsigned int bus, + unsigned int dev, unsigned int func, + int reg, int size, uint32_t *val); #define PLATFORM_START(_name, _namestr) \ static const struct platform_desc __plat_desc_##_name __used \ __attribute__((__section__(".arch.info"))) = { \ -- 1.9.1