powerpc/iseries: Convert to proc_fops

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/platforms/iseries/mf.c b/arch/powerpc/platforms/iseries/mf.c
index 0d9343d..6617915 100644 (file)
--- a/arch/powerpc/platforms/iseries/mf.c
+++ b/arch/powerpc/platforms/iseries/mf.c
@@ -855,59 +855,58 @@ static int mf_get_boot_rtc(struct rtc_time *tm)
 }
 
 #ifdef CONFIG_PROC_FS
-
-static int proc_mf_dump_cmdline(char *page, char **start, off_t off,
-               int count, int *eof, void *data)
+static int mf_cmdline_proc_show(struct seq_file *m, void *v)
 {
-       int len;
-       char *p;
+       char *page, *p;
        struct vsp_cmd_data vsp_cmd;
        int rc;
        dma_addr_t dma_addr;
 
        /* The HV appears to return no more than 256 bytes of command line */
-       if (off >= 256)
-               return 0;
-       if ((off + count) > 256)
-               count = 256 - off;
+       page = kmalloc(256, GFP_KERNEL);
+       if (!page)
+               return -ENOMEM;
 
-       dma_addr = iseries_hv_map(page, off + count, DMA_FROM_DEVICE);
-       if (dma_addr == DMA_ERROR_CODE)
+       dma_addr = iseries_hv_map(page, 256, DMA_FROM_DEVICE);
+       if (dma_addr == DMA_ERROR_CODE) {
+               kfree(page);
                return -ENOMEM;
-       memset(page, 0, off + count);
+       }
+       memset(page, 0, 256);
        memset(&vsp_cmd, 0, sizeof(vsp_cmd));
        vsp_cmd.cmd = 33;
        vsp_cmd.sub_data.kern.token = dma_addr;
        vsp_cmd.sub_data.kern.address_type = HvLpDma_AddressType_TceIndex;
-       vsp_cmd.sub_data.kern.side = (u64)data;
-       vsp_cmd.sub_data.kern.length = off + count;
+       vsp_cmd.sub_data.kern.side = (u64)m->private;
+       vsp_cmd.sub_data.kern.length = 256;
        mb();
        rc = signal_vsp_instruction(&vsp_cmd);
-       iseries_hv_unmap(dma_addr, off + count, DMA_FROM_DEVICE);
-       if (rc)
+       iseries_hv_unmap(dma_addr, 256, DMA_FROM_DEVICE);
+       if (rc) {
+               kfree(page);
                return rc;
-       if (vsp_cmd.result_code != 0)
+       }
+       if (vsp_cmd.result_code != 0) {
+               kfree(page);
                return -ENOMEM;
+       }
        p = page;
-       len = 0;
-       while (len < (off + count)) {
-               if ((*p == '\0') || (*p == '\n')) {
-                       if (*p == '\0')
-                               *p = '\n';
-                       p++;
-                       len++;
-                       *eof = 1;
+       while (p - page < 256) {
+               if (*p == '\0' || *p == '\n') {
+                       *p = '\n';
                        break;
                }
                p++;
-               len++;
-       }
 
-       if (len < off) {
-               *eof = 1;
-               len = 0;
        }
-       return len;
+       seq_write(m, page, p - page);
+       kfree(page);
+       return 0;
+}
+
+static int mf_cmdline_proc_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, mf_cmdline_proc_show, PDE(inode)->data);
 }
 
 #if 0
@@ -962,10 +961,8 @@ static int proc_mf_dump_vmlinux(char *page, char **start, off_t off,
 }
 #endif
 
-static int proc_mf_dump_side(char *page, char **start, off_t off,
-               int count, int *eof, void *data)
+static int mf_side_proc_show(struct seq_file *m, void *v)
 {
-       int len;
        char mf_current_side = ' ';
        struct vsp_cmd_data vsp_cmd;
 
@@ -989,21 +986,17 @@ static int proc_mf_dump_side(char *page, char **start, off_t off,
                }
        }
 
-       len = sprintf(page, "%c\n", mf_current_side);
+       seq_printf(m, "%c\n", mf_current_side);
+       return 0;
+}
 
-       if (len <= (off + count))
-               *eof = 1;
-       *start = page + off;
-       len -= off;
-       if (len > count)
-               len = count;
-       if (len < 0)
-               len = 0;
-       return len;
+static int mf_side_proc_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, mf_side_proc_show, NULL);
 }
 
-static int proc_mf_change_side(struct file *file, const char __user *buffer,
-               unsigned long count, void *data)
+static ssize_t mf_side_proc_write(struct file *file, const char __user *buffer,
+                                 size_t count, loff_t *pos)
 {
        char side;
        u64 newSide;
@@ -1041,6 +1034,15 @@ static int proc_mf_change_side(struct file *file, const char __user *buffer,
        return count;
 }
 
+static const struct file_operations mf_side_proc_fops = {
+       .owner          = THIS_MODULE,
+       .open           = mf_side_proc_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = single_release,
+       .write          = mf_side_proc_write,
+};
+
 #if 0
 static void mf_getSrcHistory(char *buffer, int size)
 {
@@ -1087,8 +1089,7 @@ static void mf_getSrcHistory(char *buffer, int size)
 }
 #endif
 
-static int proc_mf_dump_src(char *page, char **start, off_t off,
-               int count, int *eof, void *data)
+static int mf_src_proc_show(struct seq_file *m, void *v)
 {
 #if 0
        int len;
@@ -1109,8 +1110,13 @@ static int proc_mf_dump_src(char *page, char **start, off_t off,
 #endif
 }
 
-static int proc_mf_change_src(struct file *file, const char __user *buffer,
-               unsigned long count, void *data)
+static int mf_src_proc_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, mf_src_proc_show, NULL);
+}
+
+static ssize_t mf_src_proc_write(struct file *file, const char __user *buffer,
+                                size_t count, loff_t *pos)
 {
        char stkbuf[10];
 
@@ -1135,9 +1141,19 @@ static int proc_mf_change_src(struct file *file, const char __user *buffer,
        return count;
 }
 
-static int proc_mf_change_cmdline(struct file *file, const char __user *buffer,
-               unsigned long count, void *data)
+static const struct file_operations mf_src_proc_fops = {
+       .owner          = THIS_MODULE,
+       .open           = mf_src_proc_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = single_release,
+       .write          = mf_src_proc_write,
+};
+
+static ssize_t mf_cmdline_proc_write(struct file *file, const char __user *buffer,
+                                    size_t count, loff_t *pos)
 {
+       void *data = PDE(file->f_path.dentry->d_inode)->data;
        struct vsp_cmd_data vsp_cmd;
        dma_addr_t dma_addr;
        char *page;
@@ -1172,6 +1188,15 @@ out:
        return ret;
 }
 
+static const struct file_operations mf_cmdline_proc_fops = {
+       .owner          = THIS_MODULE,
+       .open           = mf_cmdline_proc_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = single_release,
+       .write          = mf_cmdline_proc_write,
+};
+
 static ssize_t proc_mf_change_vmlinux(struct file *file,
                                      const char __user *buf,
                                      size_t count, loff_t *ppos)
@@ -1246,12 +1271,10 @@ static int __init mf_proc_init(void)
                if (!mf)
                        return 1;
 
-               ent = create_proc_entry("cmdline", S_IFREG|S_IRUSR|S_IWUSR, mf);
+               ent = proc_create_data("cmdline", S_IRUSR|S_IWUSR, mf,
+                                      &mf_cmdline_proc_fops, (void *)(long)i);
                if (!ent)
                        return 1;
-               ent->data = (void *)(long)i;
-               ent->read_proc = proc_mf_dump_cmdline;
-               ent->write_proc = proc_mf_change_cmdline;
 
                if (i == 3)     /* no vmlinux entry for 'D' */
                        continue;
@@ -1263,19 +1286,15 @@ static int __init mf_proc_init(void)
                        return 1;
        }
 
-       ent = create_proc_entry("side", S_IFREG|S_IRUSR|S_IWUSR, mf_proc_root);
+       ent = proc_create("side", S_IFREG|S_IRUSR|S_IWUSR, mf_proc_root,
+                         &mf_side_proc_fops);
        if (!ent)
                return 1;
-       ent->data = (void *)0;
-       ent->read_proc = proc_mf_dump_side;
-       ent->write_proc = proc_mf_change_side;
 
-       ent = create_proc_entry("src", S_IFREG|S_IRUSR|S_IWUSR, mf_proc_root);
+       ent = proc_create("src", S_IFREG|S_IRUSR|S_IWUSR, mf_proc_root,
+                         &mf_src_proc_fops);
        if (!ent)
                return 1;
-       ent->data = (void *)0;
-       ent->read_proc = proc_mf_dump_src;
-       ent->write_proc = proc_mf_change_src;
 
        return 0;
 }