*/
#include <linux/types.h>
+#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/spinlock.h>
#include <linux/reboot.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
+#include <linux/scatterlist.h>
+#include <linux/iommu-helper.h>
#include <asm/byteorder.h>
#include <asm/cache.h> /* for L1_CACHE_BYTES */
#undef DEBUG_CCIO_RUN_SG
#ifdef CONFIG_PROC_FS
-/*
- * CCIO_SEARCH_TIME can help measure how fast the bitmap search is.
- * impacts performance though - ditch it if you don't use it.
- */
-#define CCIO_SEARCH_TIME
-#undef CCIO_MAP_STATS
-#else
-#undef CCIO_SEARCH_TIME
-#undef CCIO_MAP_STATS
+/* depends on proc fs support. But costs CPU performance. */
+#undef CCIO_COLLECT_STATS
#endif
#include <linux/proc_fs.h>
u32 res_size; /* size of resource map in bytes */
spinlock_t res_lock;
-#ifdef CCIO_SEARCH_TIME
+#ifdef CCIO_COLLECT_STATS
#define CCIO_SEARCH_SAMPLE 0x100
unsigned long avg_search[CCIO_SEARCH_SAMPLE];
unsigned long avg_idx; /* current index into avg_search */
-#endif
-#ifdef CCIO_MAP_STATS
unsigned long used_pages;
unsigned long msingle_calls;
unsigned long msingle_pages;
#define PDIR_INDEX(iovp) ((iovp)>>IOVP_SHIFT)
#define MKIOVP(pdir_idx) ((long)(pdir_idx) << IOVP_SHIFT)
#define MKIOVA(iovp,offset) (dma_addr_t)((long)iovp | (long)offset)
-#define ROUNDUP(x,y) ((x + ((y)-1)) & ~((y)-1))
/*
** Don't worry about the 150% average search length on a miss.
*/
#define CCIO_SEARCH_LOOP(ioc, res_idx, mask, size) \
for(; res_ptr < res_end; ++res_ptr) { \
- if(0 == (*res_ptr & mask)) { \
- *res_ptr |= mask; \
- res_idx = (unsigned int)((unsigned long)res_ptr - (unsigned long)ioc->res_map); \
- ioc->res_hint = res_idx + (size >> 3); \
- goto resource_found; \
- } \
- }
+ int ret;\
+ unsigned int idx;\
+ idx = (unsigned int)((unsigned long)res_ptr - (unsigned long)ioc->res_map); \
+ ret = iommu_is_span_boundary(idx << 3, pages_needed, 0, boundary_size);\
+ if ((0 == (*res_ptr & mask)) && !ret) { \
+ *res_ptr |= mask; \
+ res_idx = idx;\
+ ioc->res_hint = res_idx + (size >> 3); \
+ goto resource_found; \
+ } \
+ }
#define CCIO_FIND_FREE_MAPPING(ioa, res_idx, mask, size) \
u##size *res_ptr = (u##size *)&((ioc)->res_map[ioa->res_hint & ~((size >> 3) - 1)]); \
* of available pages for the requested size.
*/
static int
-ccio_alloc_range(struct ioc *ioc, size_t size)
+ccio_alloc_range(struct ioc *ioc, struct device *dev, size_t size)
{
unsigned int pages_needed = size >> IOVP_SHIFT;
unsigned int res_idx;
-#ifdef CCIO_SEARCH_TIME
+ unsigned long boundary_size;
+#ifdef CCIO_COLLECT_STATS
unsigned long cr_start = mfctl(16);
#endif
BUG_ON((pages_needed * IOVP_SIZE) > DMA_CHUNK_SIZE);
DBG_RES("%s() size: %d pages_needed %d\n",
- __FUNCTION__, size, pages_needed);
+ __func__, size, pages_needed);
/*
** "seek and ye shall find"...praying never hurts either...
** ggg sacrifices another 710 to the computer gods.
*/
+ boundary_size = ALIGN((unsigned long long)dma_get_seg_boundary(dev) + 1,
+ 1ULL << IOVP_SHIFT) >> IOVP_SHIFT;
+
if (pages_needed <= 8) {
/*
* LAN traffic will not thrash the TLB IFF the same NIC
- * uses 8 adjacent pages to map seperate payload data.
+ * uses 8 adjacent pages to map separate payload data.
* ie the same byte in the resource bit map.
*/
#if 0
#endif
} else {
panic("%s: %s() Too many pages to map. pages_needed: %u\n",
- __FILE__, __FUNCTION__, pages_needed);
+ __FILE__, __func__, pages_needed);
}
panic("%s: %s() I/O MMU is out of mapping resources.\n", __FILE__,
- __FUNCTION__);
+ __func__);
resource_found:
DBG_RES("%s() res_idx %d res_hint: %d\n",
- __FUNCTION__, res_idx, ioc->res_hint);
+ __func__, res_idx, ioc->res_hint);
-#ifdef CCIO_SEARCH_TIME
+#ifdef CCIO_COLLECT_STATS
{
unsigned long cr_end = mfctl(16);
unsigned long tmp = cr_end - cr_start;
ioc->avg_search[ioc->avg_idx++] = cr_start;
ioc->avg_idx &= CCIO_SEARCH_SAMPLE - 1;
#endif
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
ioc->used_pages += pages_needed;
#endif
/*
BUG_ON(pages_mapped > BITS_PER_LONG);
DBG_RES("%s(): res_idx: %d pages_mapped %d\n",
- __FUNCTION__, res_idx, pages_mapped);
+ __func__, res_idx, pages_mapped);
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
ioc->used_pages -= pages_mapped;
#endif
#endif
} else {
panic("%s:%s() Too many pages to unmap.\n", __FILE__,
- __FUNCTION__);
+ __func__);
}
}
** This bit tells U2 to do R/M/W for partial cachelines. "Streaming"
** data can avoid this if the mapping covers full cache lines.
** o STOP_MOST is needed for atomicity across cachelines.
-** Apperently only "some EISA devices" need this.
+** Apparently only "some EISA devices" need this.
** Using CONFIG_ISA is hack. Only the IOA with EISA under it needs
** to use this hint iff the EISA devices needs this feature.
** According to the U2 ERS, STOP_MOST enabled pages hurt performance.
* (Load Coherence Index) instruction. The 8 bits used for the virtual
* index are bits 12:19 of the value returned by LCI.
*/
-void CCIO_INLINE
+static void CCIO_INLINE
ccio_io_pdir_entry(u64 *pdir_ptr, space_t sid, unsigned long vba,
unsigned long hints)
{
size_t saved_byte_cnt;
/* round up to nearest page size */
- saved_byte_cnt = byte_cnt = ROUNDUP(byte_cnt, IOVP_SIZE);
+ saved_byte_cnt = byte_cnt = ALIGN(byte_cnt, IOVP_SIZE);
while(byte_cnt > 0) {
/* invalidate one page at a time */
offset = ((unsigned long) addr) & ~IOVP_MASK;
/* round up to nearest IOVP_SIZE */
- size = ROUNDUP(size + offset, IOVP_SIZE);
+ size = ALIGN(size + offset, IOVP_SIZE);
spin_lock_irqsave(&ioc->res_lock, flags);
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
ioc->msingle_calls++;
ioc->msingle_pages += size >> IOVP_SHIFT;
#endif
- idx = ccio_alloc_range(ioc, size);
+ idx = ccio_alloc_range(ioc, dev, size);
iovp = (dma_addr_t)MKIOVP(idx);
pdir_start = &(ioc->pdir_base[idx]);
DBG_RUN("%s() 0x%p -> 0x%lx size: %0x%x\n",
- __FUNCTION__, addr, (long)iovp | offset, size);
+ __func__, addr, (long)iovp | offset, size);
/* If not cacheline aligned, force SAFE_DMA on the whole mess */
if((size % L1_CACHE_BYTES) || ((unsigned long)addr % L1_CACHE_BYTES))
ioc = GET_IOC(dev);
DBG_RUN("%s() iovp 0x%lx/%x\n",
- __FUNCTION__, (long)iova, size);
+ __func__, (long)iova, size);
iova ^= offset; /* clear offset bits */
size += offset;
- size = ROUNDUP(size, IOVP_SIZE);
+ size = ALIGN(size, IOVP_SIZE);
spin_lock_irqsave(&ioc->res_lock, flags);
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
ioc->usingle_calls++;
ioc->usingle_pages += size >> IOVP_SHIFT;
#endif
*/
#define PIDE_FLAG 0x80000000UL
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
#define IOMMU_MAP_STATS
#endif
#include "iommu-helpers.h"
BUG_ON(!dev);
ioc = GET_IOC(dev);
- DBG_RUN_SG("%s() START %d entries\n", __FUNCTION__, nents);
+ DBG_RUN_SG("%s() START %d entries\n", __func__, nents);
/* Fast path single entry scatterlists. */
if (nents == 1) {
spin_lock_irqsave(&ioc->res_lock, flags);
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
ioc->msg_calls++;
#endif
** w/o this association, we wouldn't have coherent DMA!
** Access to the virtual address is what forces a two pass algorithm.
*/
- coalesced = iommu_coalesce_chunks(ioc, sglist, nents, ccio_alloc_range);
+ coalesced = iommu_coalesce_chunks(ioc, dev, sglist, nents, ccio_alloc_range);
/*
** Program the I/O Pdir
BUG_ON(coalesced != filled);
- DBG_RUN_SG("%s() DONE %d mappings\n", __FUNCTION__, filled);
+ DBG_RUN_SG("%s() DONE %d mappings\n", __func__, filled);
for (i = 0; i < filled; i++)
current_len += sg_dma_len(sglist + i);
ioc = GET_IOC(dev);
DBG_RUN_SG("%s() START %d entries, %08lx,%x\n",
- __FUNCTION__, nents, sg_virt_addr(sglist), sglist->length);
+ __func__, nents, sg_virt_addr(sglist), sglist->length);
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
ioc->usg_calls++;
#endif
while(sg_dma_len(sglist) && nents--) {
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
ioc->usg_pages += sg_dma_len(sglist) >> PAGE_SHIFT;
#endif
ccio_unmap_single(dev, sg_dma_address(sglist),
++sglist;
}
- DBG_RUN_SG("%s() DONE (nents %d)\n", __FUNCTION__, nents);
+ DBG_RUN_SG("%s() DONE (nents %d)\n", __func__, nents);
}
static struct hppa_dma_ops ccio_ops = {
len += seq_printf(m, "IO PDIR size : %d bytes (%d entries)\n",
total_pages * 8, total_pages);
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
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));
len += seq_printf(m, "Resource bitmap : %d bytes (%d pages)\n",
ioc->res_size, total_pages);
-#ifdef CCIO_SEARCH_TIME
+#ifdef CCIO_COLLECT_STATS
min = max = ioc->avg_search[0];
for(j = 0; j < CCIO_SEARCH_SAMPLE; ++j) {
avg += ioc->avg_search[j];
len += seq_printf(m, " Bitmap search : %ld/%ld/%ld (min/avg/max CPU Cycles)\n",
min, avg, max);
#endif
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
len += seq_printf(m, "pci_map_single(): %8ld calls %8ld pages (avg %d/1000)\n",
ioc->msingle_calls, ioc->msingle_pages,
(int)((ioc->msingle_pages * 1000)/ioc->msingle_calls));
len += seq_printf(m, "pci_unmap_sg() : %8ld calls %8ld pages (avg %d/1000)\n\n\n",
ioc->usg_calls, ioc->usg_pages,
(int)((ioc->usg_pages * 1000)/ioc->usg_calls));
-#endif /* CCIO_MAP_STATS */
+#endif /* CCIO_COLLECT_STATS */
ioc = ioc->next;
}
return single_open(file, &ccio_proc_info, NULL);
}
-static struct file_operations ccio_proc_info_fops = {
+static const struct file_operations ccio_proc_info_fops = {
.owner = THIS_MODULE,
.open = ccio_proc_info_open,
.read = seq_read,
return single_open(file, &ccio_proc_bitmap_info, NULL);
}
-static struct file_operations ccio_proc_bitmap_fops = {
+static const struct file_operations ccio_proc_bitmap_fops = {
.owner = THIS_MODULE,
.open = ccio_proc_bitmap_open,
.read = seq_read,
ccio_get_iotlb_size(struct parisc_device *dev)
{
if (dev->spa_shift == 0) {
- panic("%s() : Can't determine I/O TLB size.\n", __FUNCTION__);
+ panic("%s() : Can't determine I/O TLB size.\n", __func__);
}
return (1 << dev->spa_shift);
}
#endif /* 0 */
/* We *can't* support JAVA (T600). Venture there at your own risk. */
-static struct parisc_device_id ccio_tbl[] = {
+static const struct parisc_device_id ccio_tbl[] = {
{ HPHW_IOA, HVERSION_REV_ANY_ID, U2_IOA_RUNWAY, 0xb }, /* U2 */
{ HPHW_IOA, HVERSION_REV_ANY_ID, UTURN_IOA_RUNWAY, 0xb }, /* UTurn */
{ 0, }
BUG_ON((1 << get_order(ioc->pdir_size)) != (ioc->pdir_size >> PAGE_SHIFT));
DBG_INIT("%s() hpa 0x%p mem %luMB IOV %dMB (%d bits)\n",
- __FUNCTION__, ioc->ioc_regs,
+ __func__, ioc->ioc_regs,
(unsigned long) num_physpages >> (20 - PAGE_SHIFT),
iova_space_size>>20,
iov_order + PAGE_SHIFT);
ioc->pdir_base = (u64 *)__get_free_pages(GFP_KERNEL,
get_order(ioc->pdir_size));
if(NULL == ioc->pdir_base) {
- panic("%s() could not allocate I/O Page Table\n", __FUNCTION__);
+ panic("%s() could not allocate I/O Page Table\n", __func__);
}
memset(ioc->pdir_base, 0, ioc->pdir_size);
/* resource map size dictated by pdir_size */
ioc->res_size = (ioc->pdir_size / sizeof(u64)) >> 3;
- DBG_INIT("%s() res_size 0x%x\n", __FUNCTION__, ioc->res_size);
+ DBG_INIT("%s() res_size 0x%x\n", __func__, ioc->res_size);
ioc->res_map = (u8 *)__get_free_pages(GFP_KERNEL,
get_order(ioc->res_size));
if(NULL == ioc->res_map) {
- panic("%s() could not allocate resource map\n", __FUNCTION__);
+ panic("%s() could not allocate resource map\n", __func__);
}
memset(ioc->res_map, 0, ioc->res_size);
}
}
-static void
+static void __init
ccio_init_resource(struct resource *res, char *name, void __iomem *ioaddr)
{
int result;
result = insert_resource(&iomem_resource, res);
if (result < 0) {
printk(KERN_ERR "%s() failed to claim CCIO bus address space (%08lx,%08lx)\n",
- __FUNCTION__, res->start, res->end);
+ __func__, res->start, res->end);
}
}
* If so, initialize the chip and tell other partners in crime they
* have work to do.
*/
-static int ccio_probe(struct parisc_device *dev)
+static int __init ccio_probe(struct parisc_device *dev)
{
int i;
struct ioc *ioc, **ioc_p = &ioc_list;
- struct proc_dir_entry *info_entry, *bitmap_entry;
-
+
ioc = kzalloc(sizeof(struct ioc), GFP_KERNEL);
if (ioc == NULL) {
printk(KERN_ERR MODULE_NAME ": memory allocation failure\n");
HBA_DATA(dev->dev.platform_data)->iommu = ioc;
if (ioc_count == 0) {
- info_entry = create_proc_entry(MODULE_NAME, 0, proc_runway_root);
- if (info_entry)
- info_entry->proc_fops = &ccio_proc_info_fops;
-
- bitmap_entry = create_proc_entry(MODULE_NAME"-bitmap", 0, proc_runway_root);
- if (bitmap_entry)
- bitmap_entry->proc_fops = &ccio_proc_bitmap_fops;
+ proc_create(MODULE_NAME, 0, proc_runway_root,
+ &ccio_proc_info_fops);
+ proc_create(MODULE_NAME"-bitmap", 0, proc_runway_root,
+ &ccio_proc_bitmap_fops);
}
ioc_count++;
- parisc_vmerge_boundary = IOVP_SIZE;
- parisc_vmerge_max_size = BITS_PER_LONG * IOVP_SIZE;
parisc_has_iommu();
return 0;
}
/**
- * ccio_init - ccio initalization procedure.
+ * ccio_init - ccio initialization procedure.
*
* Register this driver.
*/
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff