diff options
Diffstat (limited to 'driver/compat.h')
| -rw-r--r-- | driver/compat.h | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/driver/compat.h b/driver/compat.h deleted file mode 100644 index 25e402a..0000000 --- a/driver/compat.h +++ /dev/null @@ -1,198 +0,0 @@ -/** - * - * @file compat.h - * @author Michael Stapelberg - * @date 2009-04-05 - * @brief Contains compatibility definitions for the different linux kernel versions to avoid - * putting ifdefs all over the driver code. - * - */ -#ifndef _COMPAT_H -#define _COMPAT_H - -#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0) -# define __devinit -# define __devexit -# define __devinitdata -#endif - -/* dev_name is the wrapper one needs to use to access what was formerly called - * bus_id in struct device. However, before 2.6.27, direct access was necessary, - * so we provide our own version. */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27) -static inline const char *dev_name(struct device *dev) { - return dev->bus_id; -} -#endif - -/* SetPageLocked disappeared in v2.6.27 */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27) - #define compat_lock_page SetPageLocked - #define compat_unlock_page ClearPageLocked -#else - /* in v2.6.28, __set_page_locked and __clear_page_locked was introduced */ - #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28) - #define compat_lock_page __set_page_locked - #define compat_unlock_page __clear_page_locked - #else - /* However, in v2.6.27 itself, neither of them is there, so - * we need to use our own function fiddling with bits inside - * the page struct :-\ */ - static inline void compat_lock_page(struct page *page) { - __set_bit(PG_locked, &page->flags); - } - - static inline void compat_unlock_page(struct page *page) { - __clear_bit(PG_locked, &page->flags); - } - #endif -#endif - -/* Before 2.6.13, simple_class was the standard interface. Nowadays, it's just called class */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,13) - - #define class_compat class_simple - - /* These functions are redirected to their old corresponding functions */ - #define class_create(module, name) class_simple_create(module, name) - #define class_destroy(type) class_simple_destroy(type) - #define class_device_destroy(unused, devno) class_simple_device_remove(devno) - #define class_device_create(type, unused, devno, devpointer, nameformat, minor, unused) \ - class_simple_device_add(type, devno, devpointer, nameformat, minor) - #define class_set_devdata(classdev, privdata) classdev->class_data = privdata - #define DEVICE_ATTR_COMPAT - #define sysfs_attr_def_name(name) class_device_attr_##name - #define sysfs_attr_def_pointer privdata->class_dev - #define SYSFS_GET_FUNCTION(name) ssize_t name(struct class_device *cls, char *buf) - #define SYSFS_SET_FUNCTION(name) ssize_t name(struct class_device *cls, const char *buf, size_t count) - #define SYSFS_GET_PRIVDATA (pcidriver_privdata_t*)cls->class_data - -#else - -/* In 2.6.26, device.h was changed quite significantly. Luckily, it only affected - type/function names, for the most part. */ -//#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26) - #define class_device_attribute device_attribute - #define CLASS_DEVICE_ATTR DEVICE_ATTR - #define class_device device - #define class_data dev -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) - #define class_device_create(type, parent, devno, devpointer, nameformat, minor, privdata) \ - device_create(type, parent, devno, privdata, nameformat, minor) -#else - #define class_device_create(type, parent, devno, devpointer, nameformat, minor, unused) \ - device_create(type, parent, devno, nameformat, minor) -#endif - #define class_device_create_file device_create_file - #define class_device_remove_file device_remove_file - #define class_device_destroy device_destroy - #define DEVICE_ATTR_COMPAT struct device_attribute *attr, - #define class_set_devdata dev_set_drvdata - - #define sysfs_attr_def_name(name) dev_attr_##name - #define sysfs_attr_def_pointer privdata->class_dev - #define SYSFS_GET_FUNCTION(name) ssize_t name(struct device *dev, struct device_attribute *attr, char *buf) - #define SYSFS_SET_FUNCTION(name) ssize_t name(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) - #define SYSFS_GET_PRIVDATA dev_get_drvdata(dev) - -//#endif - -#define class_compat class - -#endif - -/* The arguments of IRQ handlers have been changed in 2.6.19. It's very likely that - int irq will disappear somewhen in the future (current is 2.6.29), too. */ -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19) - #define IRQ_HANDLER_FUNC(name) irqreturn_t name(int irq, void *dev_id) -#else - #define IRQ_HANDLER_FUNC(name) irqreturn_t name(int irq, void *dev_id, struct pt_regs *regs) -#endif - -/* atomic_inc_return appeared in 2.6.9, at least in CERN scientific linux, provide - compatibility wrapper for older kernels */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,9) -static int atomic_inc_return(atomic_t *variable) { - atomic_inc(variable); - return atomic_read(variable); -} -#endif - -/* sg_set_page is available starting at 2.6.24 */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24) - -#define sg_set_page(sg, set_page, set_length, set_offset) do { \ - (sg)->page = set_page; \ - (sg)->length = set_length; \ - (sg)->offset = set_offset; \ -} while (0) - -#endif - -/* Before 2.6.20, disable was not an atomic counter, so this check was needed */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) -#define pci_disable_device(pdev) do { \ - if (pdev->is_enabled) \ - pci_disable_device(pdev); \ -} while (0) -#endif - -/* Before 2.6.24, scatter/gather lists did not need to be initialized */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24) - #define sg_init_table(sg, nr_pages) -#endif - -/* SA_SHIRQ was renamed to IRQF_SHARED in 2.6.24 */ -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24) - #define request_irq(irq, irq_handler, modname, privdata) request_irq(irq, irq_handler, IRQF_SHARED, modname, privdata) -#else - #define request_irq(irq, irq_handler, modname, privdata) request_irq(irq, irq_handler, SA_SHIRQ, modname, privdata) -#endif - -/* In 2.6.13, io_remap_page_range was removed in favor for io_remap_pfn_range which works on - more platforms and allows more memory space */ -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13) -#define io_remap_pfn_range_compat(vmap, vm_start, bar_addr, bar_length, vm_page_prot) \ - io_remap_pfn_range(vmap, vm_start, (bar_addr >> PAGE_SHIFT), bar_length, vm_page_prot) -#else -#define io_remap_pfn_range_compat(vmap, vm_start, bar_addr, bar_length, vm_page_prot) \ - io_remap_page_range(vmap, vm_start, bar_addr, bar_length, vm_page_prot) -#endif - -/* In 2.6.10, remap_pfn_range was introduced, see io_remap_pfn_range_compat */ -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,10) -#define remap_pfn_range_compat(vmap, vm_start, bar_addr, bar_length, vm_page_prot) \ - remap_pfn_range(vmap, vm_start, (bar_addr >> PAGE_SHIFT), bar_length, vm_page_prot) - -#define remap_pfn_range_cpua_compat(vmap, vm_start, cpua, size, vm_page_prot) \ - remap_pfn_range(vmap, vm_start, page_to_pfn(virt_to_page((void*)cpua)), size, vm_page_prot) - -#else -#define remap_pfn_range_compat(vmap, vm_start, bar_addr, bar_length, vm_page_prot) \ - remap_page_range(vmap, vm_start, bar_addr, bar_length, vm_page_prot) - -#define remap_pfn_range_cpua_compat(vmap, vm_start, cpua, size, vm_page_prot) \ - remap_page_range(vmap, vm_start, virt_to_phys((void*)cpua), size, vm_page_prot) -#endif - -/** - * Go over the pages of the kmem buffer, and mark them as reserved. - * This is needed, otherwise mmaping the kernel memory to user space - * will fail silently (mmaping /dev/null) when using remap_xx_range. - */ -static inline void set_pages_reserved_compat(unsigned long cpua, unsigned long size) -{ - /* Starting in 2.6.15, the PG_RESERVED bit was removed. - See also http://lwn.net/Articles/161204/ */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15) - struct page *page, *last_page; - - page = virt_to_page(cpua); - last_page = virt_to_page(cpua + size - 1); - - for (; page <= last_page; page++) - SetPageReserved(page); -#endif -} - -#endif |