X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=arch%2Fparisc%2Fkernel%2Fpci-dma.c;h=23c1388df1f55c5e2a34459ace9e08f336dad2df;hb=cb9577958d85896303561d9cc8544885deb272be;hp=844c2877a2e386a34169bc2e97b9bc42f866f950;hpb=28d721e24c88496ff8e9c4a0959bdc1415c0658e;p=linux-2.6-omap-h63xx.git diff --git a/arch/parisc/kernel/pci-dma.c b/arch/parisc/kernel/pci-dma.c index 844c2877a2e..23c1388df1f 100644 --- a/arch/parisc/kernel/pci-dma.c +++ b/arch/parisc/kernel/pci-dma.c @@ -21,6 +21,7 @@ #include #include #include +#include #include #include #include @@ -31,12 +32,11 @@ #include /* get_order */ #include #include +#include /* for purge_tlb_*() macros */ - -static struct proc_dir_entry * proc_gsc_root = NULL; -static int pcxl_proc_info(char *buffer, char **start, off_t offset, int length); -static unsigned long pcxl_used_bytes = 0; -static unsigned long pcxl_used_pages = 0; +static struct proc_dir_entry * proc_gsc_root __read_mostly = NULL; +static unsigned long pcxl_used_bytes __read_mostly = 0; +static unsigned long pcxl_used_pages __read_mostly = 0; extern unsigned long pcxl_dma_start; /* Start of pcxl dma mapping area */ static spinlock_t pcxl_res_lock; @@ -114,7 +114,7 @@ static inline int map_pmd_uncached(pmd_t * pmd, unsigned long vaddr, if (end > PGDIR_SIZE) end = PGDIR_SIZE; do { - pte_t * pte = pte_alloc_kernel(&init_mm, pmd, vaddr); + pte_t * pte = pte_alloc_kernel(pmd, vaddr); if (!pte) return -ENOMEM; if (map_pte_uncached(pte, orig_vaddr, end - vaddr, paddr_ptr)) @@ -330,21 +330,80 @@ pcxl_free_range(unsigned long vaddr, size_t size) dump_resmap(); } +static int proc_pcxl_dma_show(struct seq_file *m, void *v) +{ +#if 0 + u_long i = 0; + unsigned long *res_ptr = (u_long *)pcxl_res_map; +#endif + unsigned long total_pages = pcxl_res_size << 3; /* 8 bits per byte */ + + seq_printf(m, "\nDMA Mapping Area size : %d bytes (%ld pages)\n", + PCXL_DMA_MAP_SIZE, total_pages); + + seq_printf(m, "Resource bitmap : %d bytes\n", pcxl_res_size); + + seq_puts(m, " total: free: used: % used:\n"); + seq_printf(m, "blocks %8d %8ld %8ld %8ld%%\n", pcxl_res_size, + pcxl_res_size - pcxl_used_bytes, pcxl_used_bytes, + (pcxl_used_bytes * 100) / pcxl_res_size); + + seq_printf(m, "pages %8ld %8ld %8ld %8ld%%\n", total_pages, + total_pages - pcxl_used_pages, pcxl_used_pages, + (pcxl_used_pages * 100 / total_pages)); + +#if 0 + seq_puts(m, "\nResource bitmap:"); + + for(; i < (pcxl_res_size / sizeof(u_long)); ++i, ++res_ptr) { + if ((i & 7) == 0) + seq_puts(m,"\n "); + seq_printf(m, "%s %08lx", buf, *res_ptr); + } +#endif + seq_putc(m, '\n'); + return 0; +} + +static int proc_pcxl_dma_open(struct inode *inode, struct file *file) +{ + return single_open(file, proc_pcxl_dma_show, NULL); +} + +static const struct file_operations proc_pcxl_dma_ops = { + .owner = THIS_MODULE, + .open = proc_pcxl_dma_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + static int __init pcxl_dma_init(void) { - if (pcxl_dma_start == 0) - return 0; + if (pcxl_dma_start == 0) + return 0; - spin_lock_init(&pcxl_res_lock); - pcxl_res_size = PCXL_DMA_MAP_SIZE >> (PAGE_SHIFT + 3); - pcxl_res_hint = 0; - pcxl_res_map = (char *)__get_free_pages(GFP_KERNEL, + spin_lock_init(&pcxl_res_lock); + pcxl_res_size = PCXL_DMA_MAP_SIZE >> (PAGE_SHIFT + 3); + pcxl_res_hint = 0; + pcxl_res_map = (char *)__get_free_pages(GFP_KERNEL, get_order(pcxl_res_size)); - memset(pcxl_res_map, 0, pcxl_res_size); - proc_gsc_root = proc_mkdir("gsc", 0); - create_proc_info_entry("dino", 0, proc_gsc_root, pcxl_proc_info); - return 0; + memset(pcxl_res_map, 0, pcxl_res_size); + proc_gsc_root = proc_mkdir("gsc", NULL); + if (!proc_gsc_root) + printk(KERN_WARNING + "pcxl_dma_init: Unable to create gsc /proc dir entry\n"); + else { + struct proc_dir_entry* ent; + ent = create_proc_entry("pcxl_dma", 0, proc_gsc_root); + if (ent) + ent->proc_fops = &proc_pcxl_dma_ops; + else + printk(KERN_WARNING + "pci-dma.c: Unable to create pcxl_dma /proc entry.\n"); + } + return 0; } __initcall(pcxl_dma_init); @@ -541,38 +600,3 @@ struct hppa_dma_ops pcx_dma_ops = { .dma_sync_sg_for_cpu = pa11_dma_sync_sg_for_cpu, .dma_sync_sg_for_device = pa11_dma_sync_sg_for_device, }; - - -static int pcxl_proc_info(char *buf, char **start, off_t offset, int len) -{ - u_long i = 0; - unsigned long *res_ptr = (u_long *)pcxl_res_map; - unsigned long total_pages = pcxl_res_size << 3; /* 8 bits per byte */ - - sprintf(buf, "\nDMA Mapping Area size : %d bytes (%d pages)\n", - PCXL_DMA_MAP_SIZE, - (pcxl_res_size << 3) ); /* 1 bit per page */ - - sprintf(buf, "%sResource bitmap : %d bytes (%d pages)\n", - buf, pcxl_res_size, pcxl_res_size << 3); /* 8 bits per byte */ - - strcat(buf, " total: free: used: % used:\n"); - sprintf(buf, "%sblocks %8d %8ld %8ld %8ld%%\n", buf, pcxl_res_size, - pcxl_res_size - pcxl_used_bytes, pcxl_used_bytes, - (pcxl_used_bytes * 100) / pcxl_res_size); - - sprintf(buf, "%spages %8ld %8ld %8ld %8ld%%\n", buf, total_pages, - total_pages - pcxl_used_pages, pcxl_used_pages, - (pcxl_used_pages * 100 / total_pages)); - - strcat(buf, "\nResource bitmap:"); - - for(; i < (pcxl_res_size / sizeof(u_long)); ++i, ++res_ptr) { - if ((i & 7) == 0) - strcat(buf,"\n "); - sprintf(buf, "%s %08lx", buf, *res_ptr); - } - strcat(buf, "\n"); - return strlen(buf); -} -