#define MTHCA_MTT_FLAG_PRESENT 1
+#define MTHCA_MPT_STATUS_SW 0xF0
+#define MTHCA_MPT_STATUS_HW 0x00
+
/*
* Buddy allocator for MTT segments (currently not very efficient
* since it doesn't keep a free list and just searches linearly
return err;
}
+/* Free mr or fmr */
+static void mthca_free_region(struct mthca_dev *dev, u32 lkey, int order,
+ u32 first_seg, struct mthca_buddy *buddy)
+{
+ if (order >= 0)
+ mthca_free_mtt(dev, first_seg, order, buddy);
+
+ if (dev->hca_type == ARBEL_NATIVE)
+ mthca_table_put(dev, dev->mr_table.mpt_table,
+ arbel_key_to_hw_index(lkey));
+
+ mthca_free(&dev->mr_table.mpt_alloc, key_to_hw_index(dev, lkey));
+}
+
void mthca_free_mr(struct mthca_dev *dev, struct mthca_mr *mr)
{
int err;
mthca_warn(dev, "HW2SW_MPT returned status 0x%02x\n",
status);
- if (mr->order >= 0)
- mthca_free_mtt(dev, mr->first_seg, mr->order, &dev->mr_table.mtt_buddy);
+ mthca_free_region(dev, mr->ibmr.lkey, mr->order, mr->first_seg,
+ &dev->mr_table.mtt_buddy);
+}
+
+int mthca_fmr_alloc(struct mthca_dev *dev, u32 pd,
+ u32 access, struct mthca_fmr *mr)
+{
+ struct mthca_mpt_entry *mpt_entry;
+ void *mailbox;
+ u64 mtt_seg;
+ u32 key, idx;
+ u8 status;
+ int list_len = mr->attr.max_pages;
+ int err = -ENOMEM;
+ int i;
+
+ might_sleep();
+
+ if (mr->attr.page_size < 12 || mr->attr.page_size >= 32)
+ return -EINVAL;
+
+ /* For Arbel, all MTTs must fit in the same page. */
+ if (dev->hca_type == ARBEL_NATIVE &&
+ mr->attr.max_pages * sizeof *mr->mem.arbel.mtts > PAGE_SIZE)
+ return -EINVAL;
+
+ mr->maps = 0;
+
+ key = mthca_alloc(&dev->mr_table.mpt_alloc);
+ if (key == -1)
+ return -ENOMEM;
+
+ idx = key & (dev->limits.num_mpts - 1);
+ mr->ibmr.rkey = mr->ibmr.lkey = hw_index_to_key(dev, key);
+
+ if (dev->hca_type == ARBEL_NATIVE) {
+ err = mthca_table_get(dev, dev->mr_table.mpt_table, key);
+ if (err)
+ goto err_out_mpt_free;
+
+ mr->mem.arbel.mpt = mthca_table_find(dev->mr_table.mpt_table, key);
+ BUG_ON(!mr->mem.arbel.mpt);
+ } else
+ mr->mem.tavor.mpt = dev->mr_table.tavor_fmr.mpt_base +
+ sizeof *(mr->mem.tavor.mpt) * idx;
+
+ for (i = MTHCA_MTT_SEG_SIZE / 8, mr->order = 0;
+ i < list_len;
+ i <<= 1, ++mr->order)
+ ; /* nothing */
+
+ mr->first_seg = mthca_alloc_mtt(dev, mr->order,
+ dev->mr_table.fmr_mtt_buddy);
+ if (mr->first_seg == -1)
+ goto err_out_table;
+
+ mtt_seg = mr->first_seg * MTHCA_MTT_SEG_SIZE;
+
+ if (dev->hca_type == ARBEL_NATIVE) {
+ mr->mem.arbel.mtts = mthca_table_find(dev->mr_table.mtt_table,
+ mr->first_seg);
+ BUG_ON(!mr->mem.arbel.mtts);
+ } else
+ mr->mem.tavor.mtts = dev->mr_table.tavor_fmr.mtt_base + mtt_seg;
+
+ mailbox = kmalloc(sizeof *mpt_entry + MTHCA_CMD_MAILBOX_EXTRA,
+ GFP_KERNEL);
+ if (!mailbox)
+ goto err_out_free_mtt;
+
+ mpt_entry = MAILBOX_ALIGN(mailbox);
+
+ mpt_entry->flags = cpu_to_be32(MTHCA_MPT_FLAG_SW_OWNS |
+ MTHCA_MPT_FLAG_MIO |
+ MTHCA_MPT_FLAG_REGION |
+ access);
+
+ mpt_entry->page_size = cpu_to_be32(mr->attr.page_size - 12);
+ mpt_entry->key = cpu_to_be32(key);
+ mpt_entry->pd = cpu_to_be32(pd);
+ memset(&mpt_entry->start, 0,
+ sizeof *mpt_entry - offsetof(struct mthca_mpt_entry, start));
+ mpt_entry->mtt_seg = cpu_to_be64(dev->mr_table.mtt_base + mtt_seg);
+
+ if (0) {
+ mthca_dbg(dev, "Dumping MPT entry %08x:\n", mr->ibmr.lkey);
+ for (i = 0; i < sizeof (struct mthca_mpt_entry) / 4; ++i) {
+ if (i % 4 == 0)
+ printk("[%02x] ", i * 4);
+ printk(" %08x", be32_to_cpu(((u32 *) mpt_entry)[i]));
+ if ((i + 1) % 4 == 0)
+ printk("\n");
+ }
+ }
+
+ err = mthca_SW2HW_MPT(dev, mpt_entry,
+ key & (dev->limits.num_mpts - 1),
+ &status);
+ if (err) {
+ mthca_warn(dev, "SW2HW_MPT failed (%d)\n", err);
+ goto err_out_mailbox_free;
+ }
+ if (status) {
+ mthca_warn(dev, "SW2HW_MPT returned status 0x%02x\n",
+ status);
+ err = -EINVAL;
+ goto err_out_mailbox_free;
+ }
+
+ kfree(mailbox);
+ return 0;
+
+err_out_mailbox_free:
+ kfree(mailbox);
+
+err_out_free_mtt:
+ mthca_free_mtt(dev, mr->first_seg, mr->order,
+ dev->mr_table.fmr_mtt_buddy);
+err_out_table:
if (dev->hca_type == ARBEL_NATIVE)
- mthca_table_put(dev, dev->mr_table.mpt_table,
- key_to_hw_index(dev, mr->ibmr.lkey));
- mthca_free(&dev->mr_table.mpt_alloc, key_to_hw_index(dev, mr->ibmr.lkey));
+ mthca_table_put(dev, dev->mr_table.mpt_table, key);
+
+err_out_mpt_free:
+ mthca_free(&dev->mr_table.mpt_alloc, mr->ibmr.lkey);
+ return err;
+}
+
+int mthca_free_fmr(struct mthca_dev *dev, struct mthca_fmr *fmr)
+{
+ if (fmr->maps)
+ return -EBUSY;
+
+ mthca_free_region(dev, fmr->ibmr.lkey, fmr->order, fmr->first_seg,
+ dev->mr_table.fmr_mtt_buddy);
+ return 0;
+}
+
+static inline int mthca_check_fmr(struct mthca_fmr *fmr, u64 *page_list,
+ int list_len, u64 iova)
+{
+ int i, page_mask;
+
+ if (list_len > fmr->attr.max_pages)
+ return -EINVAL;
+
+ page_mask = (1 << fmr->attr.page_size) - 1;
+
+ /* We are getting page lists, so va must be page aligned. */
+ if (iova & page_mask)
+ return -EINVAL;
+
+ /* Trust the user not to pass misaligned data in page_list */
+ if (0)
+ for (i = 0; i < list_len; ++i) {
+ if (page_list[i] & ~page_mask)
+ return -EINVAL;
+ }
+
+ if (fmr->maps >= fmr->attr.max_maps)
+ return -EINVAL;
+
+ return 0;
+}
+
+
+int mthca_tavor_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
+ int list_len, u64 iova)
+{
+ struct mthca_fmr *fmr = to_mfmr(ibfmr);
+ struct mthca_dev *dev = to_mdev(ibfmr->device);
+ struct mthca_mpt_entry mpt_entry;
+ u32 key;
+ int i, err;
+
+ err = mthca_check_fmr(fmr, page_list, list_len, iova);
+ if (err)
+ return err;
+
+ ++fmr->maps;
+
+ key = tavor_key_to_hw_index(fmr->ibmr.lkey);
+ key += dev->limits.num_mpts;
+ fmr->ibmr.lkey = fmr->ibmr.rkey = tavor_hw_index_to_key(key);
+
+ writeb(MTHCA_MPT_STATUS_SW, fmr->mem.tavor.mpt);
+
+ for (i = 0; i < list_len; ++i) {
+ __be64 mtt_entry = cpu_to_be64(page_list[i] |
+ MTHCA_MTT_FLAG_PRESENT);
+ mthca_write64_raw(mtt_entry, fmr->mem.tavor.mtts + i);
+ }
+
+ mpt_entry.lkey = cpu_to_be32(key);
+ mpt_entry.length = cpu_to_be64(list_len * (1ull << fmr->attr.page_size));
+ mpt_entry.start = cpu_to_be64(iova);
+
+ writel(mpt_entry.lkey, &fmr->mem.tavor.mpt->key);
+ memcpy_toio(&fmr->mem.tavor.mpt->start, &mpt_entry.start,
+ offsetof(struct mthca_mpt_entry, window_count) -
+ offsetof(struct mthca_mpt_entry, start));
+
+ writeb(MTHCA_MPT_STATUS_HW, fmr->mem.tavor.mpt);
+
+ return 0;
+}
+
+int mthca_arbel_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
+ int list_len, u64 iova)
+{
+ struct mthca_fmr *fmr = to_mfmr(ibfmr);
+ struct mthca_dev *dev = to_mdev(ibfmr->device);
+ u32 key;
+ int i, err;
+
+ err = mthca_check_fmr(fmr, page_list, list_len, iova);
+ if (err)
+ return err;
+
+ ++fmr->maps;
+
+ key = arbel_key_to_hw_index(fmr->ibmr.lkey);
+ key += dev->limits.num_mpts;
+ fmr->ibmr.lkey = fmr->ibmr.rkey = arbel_hw_index_to_key(key);
+
+ *(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_SW;
+
+ wmb();
+
+ for (i = 0; i < list_len; ++i)
+ fmr->mem.arbel.mtts[i] = cpu_to_be64(page_list[i] |
+ MTHCA_MTT_FLAG_PRESENT);
+
+ fmr->mem.arbel.mpt->key = cpu_to_be32(key);
+ fmr->mem.arbel.mpt->lkey = cpu_to_be32(key);
+ fmr->mem.arbel.mpt->length = cpu_to_be64(list_len * (1ull << fmr->attr.page_size));
+ fmr->mem.arbel.mpt->start = cpu_to_be64(iova);
+
+ wmb();
+
+ *(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_HW;
+
+ wmb();
+
+ return 0;
+}
+
+void mthca_tavor_fmr_unmap(struct mthca_dev *dev, struct mthca_fmr *fmr)
+{
+ u32 key;
+
+ if (!fmr->maps)
+ return;
+
+ key = tavor_key_to_hw_index(fmr->ibmr.lkey);
+ key &= dev->limits.num_mpts - 1;
+ fmr->ibmr.lkey = fmr->ibmr.rkey = tavor_hw_index_to_key(key);
+
+ fmr->maps = 0;
+
+ writeb(MTHCA_MPT_STATUS_SW, fmr->mem.tavor.mpt);
+}
+
+void mthca_arbel_fmr_unmap(struct mthca_dev *dev, struct mthca_fmr *fmr)
+{
+ u32 key;
+
+ if (!fmr->maps)
+ return;
+
+ key = arbel_key_to_hw_index(fmr->ibmr.lkey);
+ key &= dev->limits.num_mpts - 1;
+ fmr->ibmr.lkey = fmr->ibmr.rkey = arbel_hw_index_to_key(key);
+
+ fmr->maps = 0;
+
+ *(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_SW;
}
int __devinit mthca_init_mr_table(struct mthca_dev *dev)
{
- int err;
+ int err, i;
err = mthca_alloc_init(&dev->mr_table.mpt_alloc,
dev->limits.num_mpts,
if (err)
return err;
+ if (dev->hca_type != ARBEL_NATIVE &&
+ (dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN))
+ dev->limits.fmr_reserved_mtts = 0;
+ else
+ dev->mthca_flags |= MTHCA_FLAG_FMR;
+
err = mthca_buddy_init(&dev->mr_table.mtt_buddy,
fls(dev->limits.num_mtt_segs - 1));
+
if (err)
goto err_mtt_buddy;
+ dev->mr_table.tavor_fmr.mpt_base = NULL;
+ dev->mr_table.tavor_fmr.mtt_base = NULL;
+
+ if (dev->limits.fmr_reserved_mtts) {
+ i = fls(dev->limits.fmr_reserved_mtts - 1);
+
+ if (i >= 31) {
+ mthca_warn(dev, "Unable to reserve 2^31 FMR MTTs.\n");
+ err = -EINVAL;
+ goto err_fmr_mpt;
+ }
+
+ dev->mr_table.tavor_fmr.mpt_base =
+ ioremap(dev->mr_table.mpt_base,
+ (1 << i) * sizeof (struct mthca_mpt_entry));
+
+ if (!dev->mr_table.tavor_fmr.mpt_base) {
+ mthca_warn(dev, "MPT ioremap for FMR failed.\n");
+ err = -ENOMEM;
+ goto err_fmr_mpt;
+ }
+
+ dev->mr_table.tavor_fmr.mtt_base =
+ ioremap(dev->mr_table.mtt_base,
+ (1 << i) * MTHCA_MTT_SEG_SIZE);
+ if (!dev->mr_table.tavor_fmr.mtt_base) {
+ mthca_warn(dev, "MTT ioremap for FMR failed.\n");
+ err = -ENOMEM;
+ goto err_fmr_mtt;
+ }
+
+ err = mthca_buddy_init(&dev->mr_table.tavor_fmr.mtt_buddy, i);
+ if (err)
+ goto err_fmr_mtt_buddy;
+
+ /* Prevent regular MRs from using FMR keys */
+ err = mthca_buddy_alloc(&dev->mr_table.mtt_buddy, i);
+ if (err)
+ goto err_reserve_fmr;
+
+ dev->mr_table.fmr_mtt_buddy =
+ &dev->mr_table.tavor_fmr.mtt_buddy;
+ } else
+ dev->mr_table.fmr_mtt_buddy = &dev->mr_table.mtt_buddy;
+
+ /* FMR table is always the first, take reserved MTTs out of there */
if (dev->limits.reserved_mtts) {
- if (mthca_alloc_mtt(dev, fls(dev->limits.reserved_mtts - 1),
- &dev->mr_table.mtt_buddy) == -1) {
+ i = fls(dev->limits.reserved_mtts - 1);
+
+ if (mthca_alloc_mtt(dev, i, dev->mr_table.fmr_mtt_buddy) == -1) {
mthca_warn(dev, "MTT table of order %d is too small.\n",
- dev->mr_table.mtt_buddy.max_order);
+ dev->mr_table.fmr_mtt_buddy->max_order);
err = -ENOMEM;
- goto err_mtt_buddy;
+ goto err_reserve_mtts;
}
}
return 0;
+err_reserve_mtts:
+err_reserve_fmr:
+ if (dev->limits.fmr_reserved_mtts)
+ mthca_buddy_cleanup(&dev->mr_table.tavor_fmr.mtt_buddy);
+
+err_fmr_mtt_buddy:
+ if (dev->mr_table.tavor_fmr.mtt_base)
+ iounmap(dev->mr_table.tavor_fmr.mtt_base);
+
+err_fmr_mtt:
+ if (dev->mr_table.tavor_fmr.mpt_base)
+ iounmap(dev->mr_table.tavor_fmr.mpt_base);
+
+err_fmr_mpt:
+ mthca_buddy_cleanup(&dev->mr_table.mtt_buddy);
+
err_mtt_buddy:
mthca_alloc_cleanup(&dev->mr_table.mpt_alloc);
void __devexit mthca_cleanup_mr_table(struct mthca_dev *dev)
{
/* XXX check if any MRs are still allocated? */
+ if (dev->limits.fmr_reserved_mtts)
+ mthca_buddy_cleanup(&dev->mr_table.tavor_fmr.mtt_buddy);
+
mthca_buddy_cleanup(&dev->mr_table.mtt_buddy);
+
+ if (dev->mr_table.tavor_fmr.mtt_base)
+ iounmap(dev->mr_table.tavor_fmr.mtt_base);
+ if (dev->mr_table.tavor_fmr.mpt_base)
+ iounmap(dev->mr_table.tavor_fmr.mpt_base);
+
mthca_alloc_cleanup(&dev->mr_table.mpt_alloc);
}
projects / linux-2.6 / commitdiff