ide-disk: move /proc handling to ide-disk_proc.c (take 3)

While at it:
- idedisk_capacity() -> ide_disk_capacity()
- idedisk_proc[] -> ide_disk_proc[]
- idedisk_settings[] -> ide_disk_settings[]

v2/3:
Build fix for CONFIG_IDE_PROC_FS=n from Elias Oltmanns.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 129 insertions, 0 deletions

diff --git a/drivers/ide/ide-disk_proc.c b/drivers/ide/ide-disk_proc.c
new file mode 100644
index 000000000000..4724976afe71
--- /dev/null
+++ b/drivers/ide/ide-disk_proc.c
@@ -0,0 +1,129 @@
+#include <linux/kernel.h>
+#include <linux/ide.h>
+#include <linux/hdreg.h>
+
+#include "ide-disk.h"
+
+static int smart_enable(ide_drive_t *drive)
+{
+        ide_task_t args;
+        struct ide_taskfile *tf = &args.tf;
+
+        memset(&args, 0, sizeof(ide_task_t));
+        tf->feature = ATA_SMART_ENABLE;
+        tf->lbam    = ATA_SMART_LBAM_PASS;
+        tf->lbah    = ATA_SMART_LBAH_PASS;
+        tf->command = ATA_CMD_SMART;
+        args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
+        return ide_no_data_taskfile(drive, &args);
+}
+
+static int get_smart_data(ide_drive_t *drive, u8 *buf, u8 sub_cmd)
+{
+        ide_task_t args;
+        struct ide_taskfile *tf = &args.tf;
+
+        memset(&args, 0, sizeof(ide_task_t));
+        tf->feature = sub_cmd;
+        tf->nsect   = 0x01;
+        tf->lbam    = ATA_SMART_LBAM_PASS;
+        tf->lbah    = ATA_SMART_LBAH_PASS;
+        tf->command = ATA_CMD_SMART;
+        args.tf_flags   = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
+        args.data_phase = TASKFILE_IN;
+        (void) smart_enable(drive);
+        return ide_raw_taskfile(drive, &args, buf, 1);
+}
+
+static int proc_idedisk_read_cache
+        (char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+        ide_drive_t     *drive = (ide_drive_t *) data;
+        char            *out = page;
+        int             len;
+
+        if (drive->dev_flags & IDE_DFLAG_ID_READ)
+                len = sprintf(out, "%i\n", drive->id[ATA_ID_BUF_SIZE] / 2);
+        else
+                len = sprintf(out, "(none)\n");
+
+        PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
+}
+
+static int proc_idedisk_read_capacity
+        (char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+        ide_drive_t*drive = (ide_drive_t *)data;
+        int len;
+
+        len = sprintf(page, "%llu\n", (long long)ide_disk_capacity(drive));
+
+        PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
+}
+
+static int proc_idedisk_read_smart(char *page, char **start, off_t off,
+                                   int count, int *eof, void *data, u8 sub_cmd)
+{
+        ide_drive_t     *drive = (ide_drive_t *)data;
+        int             len = 0, i = 0;
+
+        if (get_smart_data(drive, page, sub_cmd) == 0) {
+                unsigned short *val = (unsigned short *) page;
+                char *out = (char *)val + SECTOR_SIZE;
+
+                page = out;
+                do {
+                        out += sprintf(out, "%04x%c", le16_to_cpu(*val),
+                                       (++i & 7) ? ' ' : '\n');
+                        val += 1;
+                } while (i < SECTOR_SIZE / 2);
+                len = out - page;
+        }
+
+        PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
+}
+
+static int proc_idedisk_read_sv
+        (char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+        return proc_idedisk_read_smart(page, start, off, count, eof, data,
+                                       ATA_SMART_READ_VALUES);
+}
+
+static int proc_idedisk_read_st
+        (char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+        return proc_idedisk_read_smart(page, start, off, count, eof, data,
+                                       ATA_SMART_READ_THRESHOLDS);
+}
+
+ide_proc_entry_t ide_disk_proc[] = {
+        { "cache",        S_IFREG|S_IRUGO, proc_idedisk_read_cache,    NULL },
+        { "capacity",     S_IFREG|S_IRUGO, proc_idedisk_read_capacity, NULL },
+        { "geometry",     S_IFREG|S_IRUGO, proc_ide_read_geometry,     NULL },
+        { "smart_values", S_IFREG|S_IRUSR, proc_idedisk_read_sv,       NULL },
+        { "smart_thresholds", S_IFREG|S_IRUSR, proc_idedisk_read_st,   NULL },
+        { NULL, 0, NULL, NULL }
+};
+
+ide_devset_rw_field(bios_cyl, bios_cyl);
+ide_devset_rw_field(bios_head, bios_head);
+ide_devset_rw_field(bios_sect, bios_sect);
+ide_devset_rw_field(failures, failures);
+ide_devset_rw_field(lun, lun);
+ide_devset_rw_field(max_failures, max_failures);
+
+const struct ide_proc_devset ide_disk_settings[] = {
+        IDE_PROC_DEVSET(acoustic,       0,   254),
+        IDE_PROC_DEVSET(address,        0,     2),
+        IDE_PROC_DEVSET(bios_cyl,       0, 65535),
+        IDE_PROC_DEVSET(bios_head,      0,   255),
+        IDE_PROC_DEVSET(bios_sect,      0,    63),
+        IDE_PROC_DEVSET(failures,       0, 65535),
+        IDE_PROC_DEVSET(lun,            0,     7),
+        IDE_PROC_DEVSET(max_failures,   0, 65535),
+        IDE_PROC_DEVSET(multcount,      0,    16),
+        IDE_PROC_DEVSET(nowerr,         0,     1),
+        IDE_PROC_DEVSET(wcache,         0,     1),
+        { 0 },
+};