Blackfin arch: rewrite cplbinfo to use seq files
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Mike Frysinger
Bryan Wu
parent
73feb5c09d
commit
a024d41bfe
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@ -5,189 +5,255 @@
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* Licensed under the GPL-2 or later.
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*/
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#include <linux/ctype.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/uaccess.h>
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#include <asm/cplbinit.h>
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#include <asm/blackfin.h>
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typedef enum { ICPLB, DCPLB } cplb_type;
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static char page_strtbl[][3] = { "1K", "4K", "1M", "4M" };
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static char const page_strtbl[][3] = { "1K", "4K", "1M", "4M" };
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#define page(flags) (((flags) & 0x30000) >> 16)
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#define strpage(flags) page_strtbl[page(flags)]
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#ifdef CONFIG_MPU
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static char *cplb_print_entry(char *buf, cplb_type type, unsigned int cpu)
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{
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struct cplbinfo_data {
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loff_t pos;
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char cplb_type;
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u32 mem_control;
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struct cplb_entry *tbl;
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int switched;
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int i;
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};
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if (type == ICPLB) {
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tbl = icplb_tbl[cpu];
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switched = first_switched_icplb;
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static void cplbinfo_print_header(struct seq_file *m)
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{
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seq_printf(m, "Index\tAddress\t\tData\tSize\tU/RD\tU/WR\tS/WR\tSwitch\n");
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}
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static int cplbinfo_nomore(struct cplbinfo_data *cdata)
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{
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return cdata->pos >= MAX_CPLBS;
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}
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static int cplbinfo_show(struct seq_file *m, void *p)
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{
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struct cplbinfo_data *cdata;
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unsigned long data, addr;
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loff_t pos;
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cdata = p;
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pos = cdata->pos;
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addr = cdata->tbl[pos].addr;
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data = cdata->tbl[pos].data;
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seq_printf(m,
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"%d\t0x%08lx\t%05lx\t%s\t%c\t%c\t%c\t%c\n",
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(int)pos, addr, data, strpage(data),
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(data & CPLB_USER_RD) ? 'Y' : 'N',
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(data & CPLB_USER_WR) ? 'Y' : 'N',
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(data & CPLB_SUPV_WR) ? 'Y' : 'N',
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pos < cdata->switched ? 'N' : 'Y');
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return 0;
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}
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static void cplbinfo_seq_init(struct cplbinfo_data *cdata, unsigned int cpu)
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{
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if (cdata->cplb_type == 'I') {
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cdata->mem_control = bfin_read_IMEM_CONTROL();
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cdata->tbl = icplb_tbl[cpu];
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cdata->switched = first_switched_icplb;
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} else {
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tbl = dcplb_tbl[cpu];
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switched = first_switched_dcplb;
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cdata->mem_control = bfin_read_DMEM_CONTROL();
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cdata->tbl = dcplb_tbl[cpu];
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cdata->switched = first_switched_dcplb;
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}
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buf += sprintf(buf, "Index\tAddress\t\tData\tSize\tU/RD\tU/WR\tS/WR\tSwitch\n");
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for (i = 0; i < MAX_CPLBS; ++i) {
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unsigned long data = tbl[i].data;
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unsigned long addr = tbl[i].addr;
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if (!(data & CPLB_VALID))
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continue;
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buf += sprintf(buf,
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"%d\t0x%08lx\t%05lx\t%s\t%c\t%c\t%c\t%c\n",
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i, addr, data, strpage(data),
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(data & CPLB_USER_RD) ? 'Y' : 'N',
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(data & CPLB_USER_WR) ? 'Y' : 'N',
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(data & CPLB_SUPV_WR) ? 'Y' : 'N',
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i < switched ? 'N' : 'Y');
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}
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buf += sprintf(buf, "\n");
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return buf;
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}
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#else
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struct cplbinfo_data {
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loff_t pos;
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char cplb_type;
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u32 mem_control;
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unsigned long *pdt_tables, *pdt_swapcount;
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unsigned long cplb_addr, cplb_data;
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};
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extern int page_size_table[];
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static int cplb_find_entry(unsigned long *cplb_addr,
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unsigned long *cplb_data, unsigned long addr,
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unsigned long data)
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static int cplb_find_entry(unsigned long addr_tbl, unsigned long data_tbl,
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unsigned long addr_find, unsigned long data_find)
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{
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int i;
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for (i = 0; i < 16; ++i)
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if (addr >= cplb_addr[i] &&
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addr < cplb_addr[i] + page_size_table[page(cplb_data[i])] &&
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cplb_data[i] == data)
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for (i = 0; i < 16; ++i) {
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unsigned long cplb_addr = bfin_read32(addr_tbl + i * 4);
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unsigned long cplb_data = bfin_read32(data_tbl + i * 4);
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if (addr_find >= cplb_addr &&
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addr_find < cplb_addr + page_size_table[page(cplb_data)] &&
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cplb_data == data_find)
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return i;
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}
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return -1;
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}
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static char *cplb_print_entry(char *buf, cplb_type type, unsigned int cpu)
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static void cplbinfo_print_header(struct seq_file *m)
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{
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unsigned long *p_addr, *p_data, *p_icount, *p_ocount;
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unsigned long *cplb_addr, *cplb_data;
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int entry = 0, used_cplb = 0;
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seq_printf(m, "Address\t\tData\tSize\tValid\tLocked\tSwapin\tiCount\toCount\n");
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}
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if (type == ICPLB) {
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p_addr = ipdt_tables[cpu];
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p_data = ipdt_tables[cpu] + 1;
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p_icount = ipdt_swapcount_tables[cpu];
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p_ocount = ipdt_swapcount_tables[cpu] + 1;
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cplb_addr = (unsigned long *)ICPLB_ADDR0;
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cplb_data = (unsigned long *)ICPLB_DATA0;
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static int cplbinfo_nomore(struct cplbinfo_data *cdata)
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{
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return cdata->pdt_tables[cdata->pos * 2] == 0xffffffff;
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}
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static int cplbinfo_show(struct seq_file *m, void *p)
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{
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struct cplbinfo_data *cdata;
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unsigned long data, addr;
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int entry;
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loff_t pos;
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cdata = p;
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pos = cdata->pos * 2;
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addr = cdata->pdt_tables[pos];
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data = cdata->pdt_tables[pos + 1];
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entry = cplb_find_entry(cdata->cplb_addr, cdata->cplb_data, addr, data);
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seq_printf(m,
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"0x%08lx\t0x%05lx\t%s\t%c\t%c\t%2d\t%ld\t%ld\n",
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addr, data, strpage(data),
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(data & CPLB_VALID) ? 'Y' : 'N',
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(data & CPLB_LOCK) ? 'Y' : 'N', entry,
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cdata->pdt_swapcount[pos],
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cdata->pdt_swapcount[pos + 1]);
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return 0;
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}
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static void cplbinfo_seq_init(struct cplbinfo_data *cdata, unsigned int cpu)
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{
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if (cdata->cplb_type == 'I') {
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cdata->mem_control = bfin_read_IMEM_CONTROL();
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cdata->pdt_tables = ipdt_tables[cpu];
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cdata->pdt_swapcount = ipdt_swapcount_tables[cpu];
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cdata->cplb_addr = ICPLB_ADDR0;
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cdata->cplb_data = ICPLB_DATA0;
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} else {
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p_addr = dpdt_tables[cpu];
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p_data = dpdt_tables[cpu] + 1;
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p_icount = dpdt_swapcount_tables[cpu];
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p_ocount = dpdt_swapcount_tables[cpu] + 1;
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cplb_addr = (unsigned long *)DCPLB_ADDR0;
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cplb_data = (unsigned long *)DCPLB_DATA0;
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cdata->mem_control = bfin_read_DMEM_CONTROL();
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cdata->pdt_tables = dpdt_tables[cpu];
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cdata->pdt_swapcount = dpdt_swapcount_tables[cpu];
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cdata->cplb_addr = DCPLB_ADDR0;
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cdata->cplb_data = DCPLB_DATA0;
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}
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buf += sprintf(buf, "Address\t\tData\tSize\tValid\tLocked\tSwapin\tiCount\toCount\n");
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while (*p_addr != 0xffffffff) {
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entry = cplb_find_entry(cplb_addr, cplb_data, *p_addr, *p_data);
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if (entry >= 0)
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used_cplb |= 1 << entry;
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buf += sprintf(buf,
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"0x%08lx\t0x%05lx\t%s\t%c\t%c\t%2d\t%ld\t%ld\n",
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*p_addr, *p_data, strpage(*p_data),
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(*p_data & CPLB_VALID) ? 'Y' : 'N',
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(*p_data & CPLB_LOCK) ? 'Y' : 'N', entry, *p_icount,
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*p_ocount);
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p_addr += 2;
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p_data += 2;
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p_icount += 2;
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p_ocount += 2;
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}
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if (used_cplb != 0xffff) {
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buf += sprintf(buf, "Unused/mismatched CPLBs:\n");
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for (entry = 0; entry < 16; ++entry)
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if (0 == ((1 << entry) & used_cplb)) {
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int flags = cplb_data[entry];
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buf += sprintf(buf,
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"%2d: 0x%08lx\t0x%05x\t%s\t%c\t%c\n",
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entry, cplb_addr[entry], flags, strpage(flags),
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(flags & CPLB_VALID) ? 'Y' : 'N',
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(flags & CPLB_LOCK) ? 'Y' : 'N');
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}
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}
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buf += sprintf(buf, "\n");
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return buf;
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}
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#endif
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static int cplbinfo_proc_output(char *buf, void *data)
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static void *cplbinfo_start(struct seq_file *m, loff_t *pos)
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{
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unsigned int cpu = (unsigned int)data;
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char *p = buf;
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struct cplbinfo_data *cdata = m->private;
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if (bfin_read_IMEM_CONTROL() & ENICPLB) {
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p += sprintf(p, "Instruction CPLB entry:\n");
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p = cplb_print_entry(p, ICPLB, cpu);
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} else
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p += sprintf(p, "Instruction CPLB is disabled.\n\n");
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if (!*pos) {
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seq_printf(m, "%cCPLBs are %sabled: 0x%x\n", cdata->cplb_type,
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(cdata->mem_control & ENDCPLB ? "en" : "dis"),
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cdata->mem_control);
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cplbinfo_print_header(m);
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} else if (cplbinfo_nomore(cdata))
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return NULL;
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if (bfin_read_DMEM_CONTROL() & ENDCPLB) {
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p += sprintf(p, "Data CPLB entry:\n");
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p = cplb_print_entry(p, DCPLB, cpu);
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} else
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p += sprintf(p, "Data CPLB is disabled.\n\n");
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return p - buf;
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get_cpu();
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return cdata;
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}
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static int cplbinfo_read_proc(char *page, char **start, off_t off,
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int count, int *eof, void *data)
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static void *cplbinfo_next(struct seq_file *m, void *p, loff_t *pos)
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{
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int len = cplbinfo_proc_output(page, data);
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if (len <= off + count)
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*eof = 1;
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*start = page + off;
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len -= off;
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return max(min(len, count), 0);
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struct cplbinfo_data *cdata = p;
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cdata->pos = ++(*pos);
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if (cplbinfo_nomore(cdata))
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return NULL;
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else
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return cdata;
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}
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static void cplbinfo_stop(struct seq_file *m, void *p)
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{
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put_cpu();
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}
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static const struct seq_operations cplbinfo_sops = {
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.start = cplbinfo_start,
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.next = cplbinfo_next,
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.stop = cplbinfo_stop,
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.show = cplbinfo_show,
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};
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static int cplbinfo_open(struct inode *inode, struct file *file)
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{
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char buf[256], *path, *p;
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unsigned int cpu;
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char *s_cpu, *s_cplb;
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int ret;
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struct seq_file *m;
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struct cplbinfo_data *cdata;
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path = d_path(&file->f_path, buf, sizeof(buf));
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if (IS_ERR(path))
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return PTR_ERR(path);
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s_cpu = strstr(path, "/cpu");
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s_cplb = strrchr(path, '/');
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if (!s_cpu || !s_cplb)
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return -EINVAL;
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cpu = simple_strtoul(s_cpu + 4, &p, 10);
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if (!cpu_online(cpu))
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return -ENODEV;
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ret = seq_open_private(file, &cplbinfo_sops, sizeof(*cdata));
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if (ret)
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return ret;
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m = file->private_data;
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cdata = m->private;
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cdata->pos = 0;
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cdata->cplb_type = toupper(s_cplb[1]);
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cplbinfo_seq_init(cdata, cpu);
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return 0;
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}
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static const struct file_operations cplbinfo_fops = {
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.open = cplbinfo_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_private,
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};
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static int __init cplbinfo_init(void)
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{
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struct proc_dir_entry *parent, *entry;
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struct proc_dir_entry *cplb_dir, *cpu_dir;
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char buf[10];
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unsigned int cpu;
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unsigned char str[10];
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parent = proc_mkdir("cplbinfo", NULL);
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if (!parent)
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cplb_dir = proc_mkdir("cplbinfo", NULL);
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if (!cplb_dir)
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return -ENOMEM;
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for_each_online_cpu(cpu) {
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sprintf(str, "cpu%u", cpu);
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entry = create_proc_entry(str, 0, parent);
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if (!entry)
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for_each_possible_cpu(cpu) {
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sprintf(buf, "cpu%i", cpu);
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cpu_dir = proc_mkdir(buf, cplb_dir);
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if (!cpu_dir)
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return -ENOMEM;
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entry->read_proc = cplbinfo_read_proc;
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entry->data = (void *)cpu;
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proc_create("icplb", S_IRUGO, cpu_dir, &cplbinfo_fops);
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proc_create("dcplb", S_IRUGO, cpu_dir, &cplbinfo_fops);
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}
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return 0;
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