[PARISC] Convert sba_iommu.c to use seq_file

Use seq_file interface for proc output in sba_iommu. Also
clean up the bus root assignment, and give the proc files
a more logical name. Tested on my J6000.

Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>

1 files changed, 78 insertions, 47 deletions

diff --git a/drivers/parisc/sba_iommu.c b/drivers/parisc/sba_iommu.c
index 52f265e97729..5d47c5965c51 100644
--- a/drivers/parisc/sba_iommu.c
+++ b/drivers/parisc/sba_iommu.c
@@ -37,6 +37,8 @@
 #include <asm/hardware.h>       /* for register_parisc_driver() stuff */
 
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
 #include <asm/runway.h>         /* for proc_runway_root */
 #include <asm/pdc.h>            /* for PDC_MODEL_* */
 #include <asm/pdcpat.h>         /* for is_pdc_pat() */
@@ -1892,46 +1894,43 @@ sba_common_init(struct sba_device *sba_dev)
 }
 
 #ifdef CONFIG_PROC_FS
-static int sba_proc_info(char *buf, char **start, off_t offset, int len)
+static int sba_proc_info(struct seq_file *m, void *p)
 {
         struct sba_device *sba_dev = sba_list;
         struct ioc *ioc = &sba_dev->ioc[0];     /* FIXME: Multi-IOC support! */
         int total_pages = (int) (ioc->res_size << 3); /* 8 bits per byte */
-        unsigned long i;
 #ifdef SBA_COLLECT_STATS
         unsigned long avg = 0, min, max;
 #endif
+        int i, len = 0;
 
-        sprintf(buf, "%s rev %d.%d\n",
+        len += seq_printf(m, "%s rev %d.%d\n",
                 sba_dev->name,
                 (sba_dev->hw_rev & 0x7) + 1,
                 (sba_dev->hw_rev & 0x18) >> 3
                 );
-        sprintf(buf, "%sIO PDIR size    : %d bytes (%d entries)\n",
-                buf,
+        len += seq_printf(m, "IO PDIR size    : %d bytes (%d entries)\n",
                 (int) ((ioc->res_size << 3) * sizeof(u64)), /* 8 bits/byte */
                 total_pages);
 
-        sprintf(buf, "%sResource bitmap : %d bytes (%d pages)\n", 
-                buf, ioc->res_size, ioc->res_size << 3);   /* 8 bits per byte */
+        len += seq_printf(m, "Resource bitmap : %d bytes (%d pages)\n", 
+                ioc->res_size, ioc->res_size << 3);   /* 8 bits per byte */
 
-        sprintf(buf, "%sLMMIO_BASE/MASK/ROUTE %08x %08x %08x\n",
-                buf,
+        len += seq_printf(m, "LMMIO_BASE/MASK/ROUTE %08x %08x %08x\n",
                 READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_BASE),
                 READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_MASK),
                 READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_ROUTE)
                 );
 
         for (i=0; i<4; i++)
-                sprintf(buf, "%sDIR%ld_BASE/MASK/ROUTE %08x %08x %08x\n",
-                        buf, i,
+                len += seq_printf(m, "DIR%d_BASE/MASK/ROUTE %08x %08x %08x\n", i,
                         READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_BASE  + i*0x18),
                         READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_MASK  + i*0x18),
                         READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_ROUTE + i*0x18)
                 );
 
 #ifdef SBA_COLLECT_STATS
-        sprintf(buf, "%sIO PDIR entries : %ld free  %ld used (%d%%)\n", buf,
+        len += seq_printf(m, "IO PDIR entries : %ld free  %ld used (%d%%)\n",
                 total_pages - ioc->used_pages, ioc->used_pages,
                 (int) (ioc->used_pages * 100 / total_pages));
 
@@ -1942,53 +1941,76 @@ static int sba_proc_info(char *buf, char **start, off_t offset, int len)
                 if (ioc->avg_search[i] < min) min = ioc->avg_search[i];
         }
         avg /= SBA_SEARCH_SAMPLE;
-        sprintf(buf, "%s  Bitmap search : %ld/%ld/%ld (min/avg/max CPU Cycles)\n",
-                buf, min, avg, max);
+        len += seq_printf(m, "  Bitmap search : %ld/%ld/%ld (min/avg/max CPU Cycles)\n",
+                min, avg, max);
 
-        sprintf(buf, "%spci_map_single(): %12ld calls  %12ld pages (avg %d/1000)\n",
-                buf, ioc->msingle_calls, ioc->msingle_pages,
+        len += seq_printf(m, "pci_map_single(): %12ld calls  %12ld pages (avg %d/1000)\n",
+                ioc->msingle_calls, ioc->msingle_pages,
                 (int) ((ioc->msingle_pages * 1000)/ioc->msingle_calls));
 
         /* KLUGE - unmap_sg calls unmap_single for each mapped page */
         min = ioc->usingle_calls;
         max = ioc->usingle_pages - ioc->usg_pages;
-        sprintf(buf, "%spci_unmap_single: %12ld calls  %12ld pages (avg %d/1000)\n",
-                buf, min, max,
-                (int) ((max * 1000)/min));
+        len += seq_printf(m, "pci_unmap_single: %12ld calls  %12ld pages (avg %d/1000)\n",
+                min, max, (int) ((max * 1000)/min));
 
-        sprintf(buf, "%spci_map_sg()    : %12ld calls  %12ld pages (avg %d/1000)\n",
-                buf, ioc->msg_calls, ioc->msg_pages,
+        len += seq_printf(m, "pci_map_sg()    : %12ld calls  %12ld pages (avg %d/1000)\n",
+                ioc->msg_calls, ioc->msg_pages, 
                 (int) ((ioc->msg_pages * 1000)/ioc->msg_calls));
 
-        sprintf(buf, "%spci_unmap_sg()  : %12ld calls  %12ld pages (avg %d/1000)\n",
-                buf, ioc->usg_calls, ioc->usg_pages,
+        len += seq_printf(m, "pci_unmap_sg()  : %12ld calls  %12ld pages (avg %d/1000)\n",
+                ioc->usg_calls, ioc->usg_pages,
                 (int) ((ioc->usg_pages * 1000)/ioc->usg_calls));
 #endif
 
-        return strlen(buf);
+        return 0;
 }
 
-#if 0
-/* XXX too much output - exceeds 4k limit and needs to be re-written */
 static int
-sba_resource_map(char *buf, char **start, off_t offset, int len)
+sba_proc_open(struct inode *i, struct file *f)
+{
+        return single_open(f, &sba_proc_info, NULL);
+}
+
+static struct file_operations sba_proc_fops = {
+        .owner = THIS_MODULE,
+        .open = sba_proc_open,
+        .read = seq_read,
+        .llseek = seq_lseek,
+        .release = single_release,
+};
+
+static int
+sba_proc_bitmap_info(struct seq_file *m, void *p)
 {
         struct sba_device *sba_dev = sba_list;
-        struct ioc *ioc = &sba_dev->ioc[0];     /* FIXME: Mutli-IOC suppoer! */
+        struct ioc *ioc = &sba_dev->ioc[0];     /* FIXME: Multi-IOC support! */
         unsigned int *res_ptr = (unsigned int *)ioc->res_map;
-        int i;
+        int i, len = 0;
 
-        buf[0] = '\0';
-        for(i = 0; i < (ioc->res_size / sizeof(unsigned int)); ++i, ++res_ptr) {
+        for (i = 0; i < (ioc->res_size/sizeof(unsigned int)); ++i, ++res_ptr) {
                 if ((i & 7) == 0)
-                    strcat(buf,"\n   ");
-                sprintf(buf, "%s %08x", buf, *res_ptr);
+                        len += seq_printf(m, "\n   ");
+                len += seq_printf(m, " %08x", *res_ptr);
         }
-        strcat(buf, "\n");
+        len += seq_printf(m, "\n");
 
-        return strlen(buf);
+        return 0;
 }
-#endif /* 0 */
+
+static int
+sba_proc_bitmap_open(struct inode *i, struct file *f)
+{
+        return single_open(f, &sba_proc_bitmap_info, NULL);
+}
+
+static struct file_operations sba_proc_bitmap_fops = {
+        .owner = THIS_MODULE,
+        .open = sba_proc_bitmap_open,
+        .read = seq_read,
+        .llseek = seq_lseek,
+        .release = single_release,
+};
 #endif /* CONFIG_PROC_FS */
 
 static struct parisc_device_id sba_tbl[] = {
@@ -2021,6 +2043,7 @@ sba_driver_callback(struct parisc_device *dev)
         int i;
         char *version;
         void __iomem *sba_addr = ioremap(dev->hpa.start, SBA_FUNC_SIZE);
+        struct proc_dir_entry *info_entry, *bitmap_entry, *root;
 
         sba_dump_ranges(sba_addr);
 
@@ -2088,19 +2111,27 @@ sba_driver_callback(struct parisc_device *dev)
         hppa_dma_ops = &sba_ops;
 
 #ifdef CONFIG_PROC_FS
-        if (IS_ASTRO(&dev->id)) {
-                create_proc_info_entry("Astro", 0, proc_runway_root, sba_proc_info);
-        } else if (IS_IKE(&dev->id)) {
-                create_proc_info_entry("Ike", 0, proc_runway_root, sba_proc_info);
-        } else if (IS_PLUTO(&dev->id)) {
-                create_proc_info_entry("Pluto", 0, proc_mckinley_root, sba_proc_info);
-        } else {
-                create_proc_info_entry("Reo", 0, proc_runway_root, sba_proc_info);
+        switch (dev->id.hversion) {
+        case PLUTO_MCKINLEY_PORT:
+                root = proc_mckinley_root;
+                break;
+        case ASTRO_RUNWAY_PORT:
+        case IKE_MERCED_PORT:
+        default:
+                root = proc_runway_root;
+                break;
         }
-#if 0
-        create_proc_info_entry("bitmap", 0, proc_runway_root, sba_resource_map);
-#endif
+
+        info_entry = create_proc_entry("sba_iommu", 0, root);
+        bitmap_entry = create_proc_entry("sba_iommu-bitmap", 0, root);
+
+        if (info_entry)
+                info_entry->proc_fops = &sba_proc_fops;
+
+        if (bitmap_entry)
+                bitmap_entry->proc_fops = &sba_proc_bitmap_fops;
 #endif
+
         parisc_vmerge_boundary = IOVP_SIZE;
         parisc_vmerge_max_size = IOVP_SIZE * BITS_PER_LONG;
         parisc_has_iommu();