Messages in this thread Patch in this message | | | Date | Sun, 9 Jun 2002 19:57:01 +0100 | From | Russell King <> | Subject | [PATCH] CONFIG_GENERIC_ISA_DMA |
| |
Linus, lkml,
The following patch adds support for CONFIG_GENERIC_ISA_DMA, which went into the 2.4-ac kernel series prior to 2.5 happening.
The following patch allows architectures to decide whether they want the generic ISA DMA functionality provided by kernel/dma.c and other supporting files.
In addition, we move the procfs "/proc/dma" support code out of fs/proc into kernel/dma.c, and adapt it to use the new seq_file code.
This patch is against 2.5.21.
--- orig/arch/alpha/config.in Wed May 29 23:56:58 2002 +++ linux/arch/alpha/config.in Wed May 29 21:55:08 2002 @@ -7,6 +7,7 @@ define_bool CONFIG_UID16 n define_bool CONFIG_RWSEM_GENERIC_SPINLOCK n define_bool CONFIG_RWSEM_XCHGADD_ALGORITHM y +define_bool CONFIG_GENERIC_ISA_DMA y source init/Config.in --- orig/arch/i386/config.in Wed Jun 5 10:08:22 2002 +++ linux/arch/i386/config.in Sat May 25 10:25:43 2002 @@ -9,6 +9,7 @@ define_bool CONFIG_SBUS n define_bool CONFIG_UID16 y +define_bool CONFIG_GENERIC_ISA_DMA y source init/Config.in --- orig/arch/m68k/config.in Sat May 25 11:09:21 2002 +++ linux/arch/m68k/config.in Mon May 13 10:16:01 2002 @@ -6,6 +6,7 @@ define_bool CONFIG_UID16 y define_bool CONFIG_RWSEM_GENERIC_SPINLOCK y define_bool CONFIG_RWSEM_XCHGADD_ALGORITHM n +define_bool CONFIG_GENERIC_ISA_DMA y mainmenu_name "Linux/68k Kernel Configuration" --- orig/arch/mips/config.in Sat May 25 11:09:28 2002 +++ linux/arch/mips/config.in Wed Apr 24 19:32:40 2002 @@ -4,6 +4,7 @@ # define_bool CONFIG_MIPS y define_bool CONFIG_SMP n +define_bool CONFIG_GENERIC_ISA_DMA y mainmenu_name "Linux Kernel Configuration" --- orig/arch/mips64/config.in Sat May 25 11:09:34 2002 +++ linux/arch/mips64/config.in Wed Apr 24 19:32:40 2002 @@ -26,6 +26,7 @@ define_bool CONFIG_RWSEM_GENERIC_SPINLOCK y define_bool CONFIG_RWSEM_XCHGADD_ALGORITHM n +define_bool CONFIG_GENERIC_ISA_DMA y # # Select some configuration options automatically based on user selections --- orig/arch/parisc/config.in Sat May 25 11:09:39 2002 +++ linux/arch/parisc/config.in Sun Feb 24 16:46:01 2002 @@ -9,6 +9,7 @@ define_bool CONFIG_UID16 n define_bool CONFIG_RWSEM_GENERIC_SPINLOCK y define_bool CONFIG_RWSEM_XCHGADD_ALGORITHM n +define_bool CONFIG_GENERIC_ISA_DMA y source init/Config.in --- orig/arch/ppc/config.in Wed May 29 23:57:00 2002 +++ linux/arch/ppc/config.in Wed May 29 21:55:14 2002 @@ -7,6 +7,7 @@ define_bool CONFIG_RWSEM_GENERIC_SPINLOCK n define_bool CONFIG_RWSEM_XCHGADD_ALGORITHM y define_bool CONFIG_HAVE_DEC_LOCK y +define_bool CONFIG_GENERIC_ISA_DMA y mainmenu_name "Linux/PowerPC Kernel Configuration" --- orig/arch/sh/config.in Sat May 25 11:09:56 2002 +++ linux/arch/sh/config.in Sat Mar 23 23:09:17 2002 @@ -9,6 +9,7 @@ define_bool CONFIG_UID16 y define_bool CONFIG_RWSEM_GENERIC_SPINLOCK y define_bool CONFIG_RWSEM_XCHGADD_ALGORITHM n +define_bool CONFIG_GENERIC_ISA_DMA y source init/Config.in --- orig/arch/sparc/config.in Sat May 25 11:09:59 2002 +++ linux/arch/sparc/config.in Fri May 3 10:39:16 2002 @@ -6,6 +6,7 @@ define_bool CONFIG_UID16 y define_bool CONFIG_HIGHMEM y +define_bool CONFIG_GENERIC_ISA_DMA y source init/Config.in --- orig/arch/sparc64/config.in Sat May 25 11:10:04 2002 +++ linux/arch/sparc64/config.in Mon May 6 16:42:10 2002 @@ -26,6 +26,7 @@ define_bool CONFIG_HAVE_DEC_LOCK y define_bool CONFIG_RWSEM_GENERIC_SPINLOCK n define_bool CONFIG_RWSEM_XCHGADD_ALGORITHM y +define_bool CONFIG_GENERIC_ISA_DMA y define_bool CONFIG_ISA n define_bool CONFIG_ISAPNP n define_bool CONFIG_EISA n --- linux-tolinus/kernel/Makefile Wed Jun 5 10:08:25 2002 +++ linux/kernel/Makefile Wed Jun 5 18:38:14 2002 @@ -10,13 +10,14 @@ O_TARGET := kernel.o export-objs = signal.o sys.o kmod.o context.o ksyms.o pm.o exec_domain.o \ - printk.o platform.o suspend.o + printk.o platform.o suspend.o dma.o -obj-y = sched.o dma.o fork.o exec_domain.o panic.o printk.o \ +obj-y = sched.o fork.o exec_domain.o panic.o printk.o \ module.o exit.o itimer.o time.o softirq.o resource.o \ sysctl.o capability.o ptrace.o timer.o user.o \ signal.o sys.o kmod.o context.o futex.o platform.o +obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o obj-$(CONFIG_UID16) += uid16.o obj-$(CONFIG_MODULES) += ksyms.o obj-$(CONFIG_PM) += pm.o --- linux-tolinus/kernel/dma.c Sat May 25 11:13:57 2002 +++ linux/kernel/dma.c Wed Jun 5 19:26:12 2002 @@ -9,11 +9,14 @@ * [It also happened to remove the sizeof(char *) == sizeof(int) * assumption introduced because of those /proc/dma patches. -- Hennus] */ - +#include <linux/module.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/spinlock.h> #include <linux/string.h> +#include <linux/seq_file.h> +#include <linux/proc_fs.h> +#include <linux/init.h> #include <asm/dma.h> #include <asm/system.h> @@ -65,20 +68,6 @@ { 0, 0 } }; -int get_dma_list(char *buf) -{ - int i, len = 0; - - for (i = 0 ; i < MAX_DMA_CHANNELS ; i++) { - if (dma_chan_busy[i].lock) { - len += sprintf(buf+len, "%2d: %s\n", - i, - dma_chan_busy[i].device_id); - } - } - return len; -} /* get_dma_list */ - int request_dma(unsigned int dmanr, const char * device_id) { @@ -109,6 +98,19 @@ } /* free_dma */ +static int proc_dma_show(struct seq_file *m, void *v) +{ + int i; + + for (i = 0 ; i < MAX_DMA_CHANNELS ; i++) { + if (dma_chan_busy[i].lock) { + seq_printf(m, "%2d: %s\n", i, + dma_chan_busy[i].device_id); + } + } + return 0; +} + #else int request_dma(unsigned int dmanr, const char *device_id) @@ -120,9 +122,52 @@ { } -int get_dma_list(char *buf) -{ - strcpy(buf, "No DMA\n"); - return 7; +static int proc_dma_show(struct seq_file *m, void *v) +{ + seq_puts(m, "No DMA\n"); + return 0; } + #endif + +static int proc_dma_open(struct inode *inode, struct file *file) +{ + char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); + struct seq_file *m; + int res; + + if (!buf) + return -ENOMEM; + res = single_open(file, proc_dma_show, NULL); + if (!res) { + m = file->private_data; + m->buf = buf; + m->size = PAGE_SIZE; + } else + kfree(buf); + return res; +} + +static struct file_operations proc_dma_operations = { + open: proc_dma_open, + read: seq_read, + llseek: seq_lseek, + release: single_release, +}; + +static int __init proc_dma_init(void) +{ + struct proc_dir_entry *e; + + e = create_proc_entry("dma", 0, NULL); + if (e) + e->proc_fops = &proc_dma_operations; + + return 0; +} + +__initcall(proc_dma_init); + +EXPORT_SYMBOL(request_dma); +EXPORT_SYMBOL(free_dma); +EXPORT_SYMBOL(dma_spin_lock); --- linux-tolinus/kernel/ksyms.c Wed Jun 5 10:08:25 2002 +++ linux/kernel/ksyms.c Wed Jun 5 18:48:44 2002 @@ -63,9 +63,6 @@ extern void *sys_call_table; extern struct timezone sys_tz; -extern int request_dma(unsigned int dmanr, const char * deviceID); -extern void free_dma(unsigned int dmanr); -extern spinlock_t dma_spin_lock; #ifdef CONFIG_MODVERSIONS const struct module_symbol __export_Using_Versions @@ -434,10 +432,6 @@ EXPORT_SYMBOL(brw_kiovec); EXPORT_SYMBOL(kiobuf_wait_for_io); -/* dma handling */ -EXPORT_SYMBOL(request_dma); -EXPORT_SYMBOL(free_dma); -EXPORT_SYMBOL(dma_spin_lock); #ifdef HAVE_DISABLE_HLT EXPORT_SYMBOL(disable_hlt); EXPORT_SYMBOL(enable_hlt); --- linux-tolinus/fs/proc/proc_misc.c Wed May 29 23:57:09 2002 +++ linux/fs/proc/proc_misc.c Wed Jun 5 19:17:51 2002 @@ -394,13 +394,6 @@ return proc_calc_metrics(page, start, off, count, eof, len); } -static int dma_read_proc(char *page, char **start, off_t off, - int count, int *eof, void *data) -{ - int len = get_dma_list(page); - return proc_calc_metrics(page, start, off, count, eof, len); -} - static int ioports_read_proc(char *page, char **start, off_t off, int count, int *eof, void *data) { @@ -553,7 +546,6 @@ {"stat", kstat_read_proc}, {"devices", devices_read_proc}, {"filesystems", filesystems_read_proc}, - {"dma", dma_read_proc}, {"ioports", ioports_read_proc}, {"cmdline", cmdline_read_proc}, #ifdef CONFIG_SGI_DS1286 -- Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux http://www.arm.linux.org.uk/personal/aboutme.html
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |