]> pilppa.com Git - linux-2.6-omap-h63xx.git/commitdiff
Blackfin arch: rewrite cplbinfo to use seq files
authorMike Frysinger <vapier.adi@gmail.com>
Wed, 7 Jan 2009 15:14:39 +0000 (23:14 +0800)
committerBryan Wu <cooloney@kernel.org>
Wed, 7 Jan 2009 15:14:39 +0000 (23:14 +0800)
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
arch/blackfin/kernel/cplbinfo.c

index 723839da14a101c0f21d3053fc4e5d124e3750fd..1d3bbec1a195dfb7e54eecb0e2519362e322c383 100644 (file)
  * Licensed under the GPL-2 or later.
  */
 
+#include <linux/ctype.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/uaccess.h>
 
 #include <asm/cplbinit.h>
 #include <asm/blackfin.h>
 
-typedef enum { ICPLB, DCPLB } cplb_type;
-
-static char page_strtbl[][3] = { "1K", "4K", "1M", "4M" };
+static char const page_strtbl[][3] = { "1K", "4K", "1M", "4M" };
 #define page(flags)    (((flags) & 0x30000) >> 16)
 #define strpage(flags) page_strtbl[page(flags)]
 
 #ifdef CONFIG_MPU
 
-static char *cplb_print_entry(char *buf, cplb_type type, unsigned int cpu)
-{
+struct cplbinfo_data {
+       loff_t pos;
+       char cplb_type;
+       u32 mem_control;
        struct cplb_entry *tbl;
        int switched;
-       int i;
+};
 
-       if (type == ICPLB) {
-               tbl = icplb_tbl[cpu];
-               switched = first_switched_icplb;
-       } else {
-               tbl = dcplb_tbl[cpu];
-               switched = first_switched_dcplb;
-       }
+static void cplbinfo_print_header(struct seq_file *m)
+{
+       seq_printf(m, "Index\tAddress\t\tData\tSize\tU/RD\tU/WR\tS/WR\tSwitch\n");
+}
 
-       buf += sprintf(buf, "Index\tAddress\t\tData\tSize\tU/RD\tU/WR\tS/WR\tSwitch\n");
-       for (i = 0; i < MAX_CPLBS; ++i) {
-               unsigned long data = tbl[i].data;
-               unsigned long addr = tbl[i].addr;
-
-               if (!(data & CPLB_VALID))
-                       continue;
-
-               buf += sprintf(buf,
-                       "%d\t0x%08lx\t%05lx\t%s\t%c\t%c\t%c\t%c\n",
-                       i, addr, data, strpage(data),
-                       (data & CPLB_USER_RD) ? 'Y' : 'N',
-                       (data & CPLB_USER_WR) ? 'Y' : 'N',
-                       (data & CPLB_SUPV_WR) ? 'Y' : 'N',
-                       i < switched ? 'N' : 'Y');
-       }
-       buf += sprintf(buf, "\n");
+static int cplbinfo_nomore(struct cplbinfo_data *cdata)
+{
+       return cdata->pos >= MAX_CPLBS;
+}
+
+static int cplbinfo_show(struct seq_file *m, void *p)
+{
+       struct cplbinfo_data *cdata;
+       unsigned long data, addr;
+       loff_t pos;
+
+       cdata = p;
+       pos = cdata->pos;
+       addr = cdata->tbl[pos].addr;
+       data = cdata->tbl[pos].data;
+
+       seq_printf(m,
+               "%d\t0x%08lx\t%05lx\t%s\t%c\t%c\t%c\t%c\n",
+               (int)pos, addr, data, strpage(data),
+               (data & CPLB_USER_RD) ? 'Y' : 'N',
+               (data & CPLB_USER_WR) ? 'Y' : 'N',
+               (data & CPLB_SUPV_WR) ? 'Y' : 'N',
+               pos < cdata->switched ? 'N' : 'Y');
 
-       return buf;
+       return 0;
+}
+
+static void cplbinfo_seq_init(struct cplbinfo_data *cdata, unsigned int cpu)
+{
+       if (cdata->cplb_type == 'I') {
+               cdata->mem_control = bfin_read_IMEM_CONTROL();
+               cdata->tbl = icplb_tbl[cpu];
+               cdata->switched = first_switched_icplb;
+       } else {
+               cdata->mem_control = bfin_read_DMEM_CONTROL();
+               cdata->tbl = dcplb_tbl[cpu];
+               cdata->switched = first_switched_dcplb;
+       }
 }
 
 #else
 
+struct cplbinfo_data {
+       loff_t pos;
+       char cplb_type;
+       u32 mem_control;
+       unsigned long *pdt_tables, *pdt_swapcount;
+       unsigned long cplb_addr, cplb_data;
+};
+
 extern int page_size_table[];
 
-static int cplb_find_entry(unsigned long *cplb_addr,
-                          unsigned long *cplb_data, unsigned long addr,
-                          unsigned long data)
+static int cplb_find_entry(unsigned long addr_tbl, unsigned long data_tbl,
+                           unsigned long addr_find, unsigned long data_find)
 {
        int i;
 
-       for (i = 0; i < 16; ++i)
-               if (addr >= cplb_addr[i] &&
-                   addr < cplb_addr[i] + page_size_table[page(cplb_data[i])] &&
-                   cplb_data[i] == data)
+       for (i = 0; i < 16; ++i) {
+               unsigned long cplb_addr = bfin_read32(addr_tbl + i * 4);
+               unsigned long cplb_data = bfin_read32(data_tbl + i * 4);
+               if (addr_find >= cplb_addr &&
+                   addr_find < cplb_addr + page_size_table[page(cplb_data)] &&
+                   cplb_data == data_find)
                        return i;
+       }
 
        return -1;
 }
 
-static char *cplb_print_entry(char *buf, cplb_type type, unsigned int cpu)
+static void cplbinfo_print_header(struct seq_file *m)
 {
-       unsigned long *p_addr, *p_data, *p_icount, *p_ocount;
-       unsigned long *cplb_addr, *cplb_data;
-       int entry = 0, used_cplb = 0;
-
-       if (type == ICPLB) {
-               p_addr = ipdt_tables[cpu];
-               p_data = ipdt_tables[cpu] + 1;
-               p_icount = ipdt_swapcount_tables[cpu];
-               p_ocount = ipdt_swapcount_tables[cpu] + 1;
-               cplb_addr = (unsigned long *)ICPLB_ADDR0;
-               cplb_data = (unsigned long *)ICPLB_DATA0;
-       } else {
-               p_addr = dpdt_tables[cpu];
-               p_data = dpdt_tables[cpu] + 1;
-               p_icount = dpdt_swapcount_tables[cpu];
-               p_ocount = dpdt_swapcount_tables[cpu] + 1;
-               cplb_addr = (unsigned long *)DCPLB_ADDR0;
-               cplb_data = (unsigned long *)DCPLB_DATA0;
-       }
-
-       buf += sprintf(buf, "Address\t\tData\tSize\tValid\tLocked\tSwapin\tiCount\toCount\n");
+       seq_printf(m, "Address\t\tData\tSize\tValid\tLocked\tSwapin\tiCount\toCount\n");
+}
 
-       while (*p_addr != 0xffffffff) {
-               entry = cplb_find_entry(cplb_addr, cplb_data, *p_addr, *p_data);
-               if (entry >= 0)
-                       used_cplb |= 1 << entry;
+static int cplbinfo_nomore(struct cplbinfo_data *cdata)
+{
+       return cdata->pdt_tables[cdata->pos * 2] == 0xffffffff;
+}
 
-               buf += sprintf(buf,
-                       "0x%08lx\t0x%05lx\t%s\t%c\t%c\t%2d\t%ld\t%ld\n",
-                       *p_addr, *p_data, strpage(*p_data),
-                       (*p_data & CPLB_VALID) ? 'Y' : 'N',
-                       (*p_data & CPLB_LOCK) ? 'Y' : 'N', entry, *p_icount,
-                       *p_ocount);
+static int cplbinfo_show(struct seq_file *m, void *p)
+{
+       struct cplbinfo_data *cdata;
+       unsigned long data, addr;
+       int entry;
+       loff_t pos;
+
+       cdata = p;
+       pos = cdata->pos * 2;
+       addr = cdata->pdt_tables[pos];
+       data = cdata->pdt_tables[pos + 1];
+       entry = cplb_find_entry(cdata->cplb_addr, cdata->cplb_data, addr, data);
+
+       seq_printf(m,
+               "0x%08lx\t0x%05lx\t%s\t%c\t%c\t%2d\t%ld\t%ld\n",
+               addr, data, strpage(data),
+               (data & CPLB_VALID) ? 'Y' : 'N',
+               (data & CPLB_LOCK) ? 'Y' : 'N', entry,
+               cdata->pdt_swapcount[pos],
+               cdata->pdt_swapcount[pos + 1]);
 
-               p_addr += 2;
-               p_data += 2;
-               p_icount += 2;
-               p_ocount += 2;
-       }
+       return 0;
+}
 
-       if (used_cplb != 0xffff) {
-               buf += sprintf(buf, "Unused/mismatched CPLBs:\n");
-
-               for (entry = 0; entry < 16; ++entry)
-                       if (0 == ((1 << entry) & used_cplb)) {
-                               int flags = cplb_data[entry];
-                               buf += sprintf(buf,
-                                       "%2d: 0x%08lx\t0x%05x\t%s\t%c\t%c\n",
-                                       entry, cplb_addr[entry], flags, strpage(flags),
-                                       (flags & CPLB_VALID) ? 'Y' : 'N',
-                                       (flags & CPLB_LOCK) ? 'Y' : 'N');
-                       }
+static void cplbinfo_seq_init(struct cplbinfo_data *cdata, unsigned int cpu)
+{
+       if (cdata->cplb_type == 'I') {
+               cdata->mem_control = bfin_read_IMEM_CONTROL();
+               cdata->pdt_tables = ipdt_tables[cpu];
+               cdata->pdt_swapcount = ipdt_swapcount_tables[cpu];
+               cdata->cplb_addr = ICPLB_ADDR0;
+               cdata->cplb_data = ICPLB_DATA0;
+       } else {
+               cdata->mem_control = bfin_read_DMEM_CONTROL();
+               cdata->pdt_tables = dpdt_tables[cpu];
+               cdata->pdt_swapcount = dpdt_swapcount_tables[cpu];
+               cdata->cplb_addr = DCPLB_ADDR0;
+               cdata->cplb_data = DCPLB_DATA0;
        }
+}
 
-       buf += sprintf(buf, "\n");
+#endif
 
-       return buf;
+static void *cplbinfo_start(struct seq_file *m, loff_t *pos)
+{
+       struct cplbinfo_data *cdata = m->private;
+
+       if (!*pos) {
+               seq_printf(m, "%cCPLBs are %sabled: 0x%x\n", cdata->cplb_type,
+                       (cdata->mem_control & ENDCPLB ? "en" : "dis"),
+                       cdata->mem_control);
+               cplbinfo_print_header(m);
+       } else if (cplbinfo_nomore(cdata))
+               return NULL;
+
+       get_cpu();
+       return cdata;
 }
 
-#endif
+static void *cplbinfo_next(struct seq_file *m, void *p, loff_t *pos)
+{
+       struct cplbinfo_data *cdata = p;
+       cdata->pos = ++(*pos);
+       if (cplbinfo_nomore(cdata))
+               return NULL;
+       else
+               return cdata;
+}
 
-static int cplbinfo_proc_output(char *buf, void *data)
+static void cplbinfo_stop(struct seq_file *m, void *p)
 {
-       unsigned int cpu = (unsigned int)data;
-       char *p = buf;
-
-       if (bfin_read_IMEM_CONTROL() & ENICPLB) {
-               p += sprintf(p, "Instruction CPLB entry:\n");
-               p = cplb_print_entry(p, ICPLB, cpu);
-       } else
-               p += sprintf(p, "Instruction CPLB is disabled.\n\n");
-
-       if (bfin_read_DMEM_CONTROL() & ENDCPLB) {
-               p += sprintf(p, "Data CPLB entry:\n");
-               p = cplb_print_entry(p, DCPLB, cpu);
-       } else
-               p += sprintf(p, "Data CPLB is disabled.\n\n");
-
-       return p - buf;
+       put_cpu();
 }
 
-static int cplbinfo_read_proc(char *page, char **start, off_t off,
-                             int count, int *eof, void *data)
+static const struct seq_operations cplbinfo_sops = {
+       .start = cplbinfo_start,
+       .next  = cplbinfo_next,
+       .stop  = cplbinfo_stop,
+       .show  = cplbinfo_show,
+};
+
+static int cplbinfo_open(struct inode *inode, struct file *file)
 {
-       int len = cplbinfo_proc_output(page, data);
-       if (len <= off + count)
-               *eof = 1;
-       *start = page + off;
-       len -= off;
-       return max(min(len, count), 0);
+       char buf[256], *path, *p;
+       unsigned int cpu;
+       char *s_cpu, *s_cplb;
+       int ret;
+       struct seq_file *m;
+       struct cplbinfo_data *cdata;
+
+       path = d_path(&file->f_path, buf, sizeof(buf));
+       if (IS_ERR(path))
+               return PTR_ERR(path);
+       s_cpu = strstr(path, "/cpu");
+       s_cplb = strrchr(path, '/');
+       if (!s_cpu || !s_cplb)
+               return -EINVAL;
+
+       cpu = simple_strtoul(s_cpu + 4, &p, 10);
+       if (!cpu_online(cpu))
+               return -ENODEV;
+
+       ret = seq_open_private(file, &cplbinfo_sops, sizeof(*cdata));
+       if (ret)
+               return ret;
+       m = file->private_data;
+       cdata = m->private;
+
+       cdata->pos = 0;
+       cdata->cplb_type = toupper(s_cplb[1]);
+       cplbinfo_seq_init(cdata, cpu);
+
+       return 0;
 }
 
+static const struct file_operations cplbinfo_fops = {
+       .open    = cplbinfo_open,
+       .read    = seq_read,
+       .llseek  = seq_lseek,
+       .release = seq_release_private,
+};
+
 static int __init cplbinfo_init(void)
 {
-       struct proc_dir_entry *parent, *entry;
+       struct proc_dir_entry *cplb_dir, *cpu_dir;
+       char buf[10];
        unsigned int cpu;
-       unsigned char str[10];
 
-       parent = proc_mkdir("cplbinfo", NULL);
-       if (!parent)
+       cplb_dir = proc_mkdir("cplbinfo", NULL);
+       if (!cplb_dir)
                return -ENOMEM;
 
-       for_each_online_cpu(cpu) {
-               sprintf(str, "cpu%u", cpu);
-               entry = create_proc_entry(str, 0, parent);
-               if (!entry)
+       for_each_possible_cpu(cpu) {
+               sprintf(buf, "cpu%i", cpu);
+               cpu_dir = proc_mkdir(buf, cplb_dir);
+               if (!cpu_dir)
                        return -ENOMEM;
 
-               entry->read_proc = cplbinfo_read_proc;
-               entry->data = (void *)cpu;
+               proc_create("icplb", S_IRUGO, cpu_dir, &cplbinfo_fops);
+               proc_create("dcplb", S_IRUGO, cpu_dir, &cplbinfo_fops);
        }
 
        return 0;