1 files changed, 376 insertions, 10 deletions

diff --git a/drivers/infiniband/hw/mthca/mthca_mr.c b/drivers/infiniband/hw/mthca/mthca_mr.c
index ac3265d0bf79..a85b503b8522 100644
--- a/drivers/infiniband/hw/mthca/mthca_mr.c
+++ b/drivers/infiniband/hw/mthca/mthca_mr.c
@@ -66,6 +66,9 @@ struct mthca_mpt_entry {
 
 #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
@@ -442,6 +445,20 @@ err_out_mpt_free:
 	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;
@@ -459,18 +476,288 @@ void mthca_free_mr(struct mthca_dev *dev, struct mthca_mr *mr)
 		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,
@@ -478,23 +765,93 @@ int __devinit mthca_init_mr_table(struct mthca_dev *dev)
 	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);
 
@@ -504,6 +861,15 @@ err_mtt_buddy:
 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);
 }