[PATCH 10/14] IB/mthca: Split off MTT allocation
From: Roland Dreier
Date: Thu Jun 23 2005 - 23:33:29 EST
Split allocation of MTT range from creation of MR. This will be
useful for implementing shared memory regions and userspace verbs.
Signed-off-by: Roland Dreier <roland@xxxxxxxxxxx>
---
linux.git/drivers/infiniband/hw/mthca/mthca_dev.h | 6
linux.git/drivers/infiniband/hw/mthca/mthca_mr.c | 325 +++++++++++++--------------
linux.git/drivers/infiniband/hw/mthca/mthca_provider.h | 14 -
3 files changed, 177 insertions(+), 168 deletions(-)
--- linux.git.orig/drivers/infiniband/hw/mthca/mthca_dev.h 2005-06-23 13:03:02.630547703 -0700
+++ linux.git/drivers/infiniband/hw/mthca/mthca_dev.h 2005-06-23 13:03:07.308535271 -0700
@@ -380,6 +380,12 @@ void mthca_uar_free(struct mthca_dev *de
int mthca_pd_alloc(struct mthca_dev *dev, struct mthca_pd *pd);
void mthca_pd_free(struct mthca_dev *dev, struct mthca_pd *pd);
+struct mthca_mtt *mthca_alloc_mtt(struct mthca_dev *dev, int size);
+void mthca_free_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt);
+int mthca_write_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt,
+ int start_index, u64 *buffer_list, int list_len);
+int mthca_mr_alloc(struct mthca_dev *dev, u32 pd, int buffer_size_shift,
+ u64 iova, u64 total_size, u32 access, struct mthca_mr *mr);
int mthca_mr_alloc_notrans(struct mthca_dev *dev, u32 pd,
u32 access, struct mthca_mr *mr);
int mthca_mr_alloc_phys(struct mthca_dev *dev, u32 pd,
--- linux.git.orig/drivers/infiniband/hw/mthca/mthca_mr.c 2005-06-23 13:03:06.792646922 -0700
+++ linux.git/drivers/infiniband/hw/mthca/mthca_mr.c 2005-06-23 13:03:07.308535271 -0700
@@ -40,6 +40,12 @@
#include "mthca_cmd.h"
#include "mthca_memfree.h"
+struct mthca_mtt {
+ struct mthca_buddy *buddy;
+ int order;
+ u32 first_seg;
+};
+
/*
* Must be packed because mtt_seg is 64 bits but only aligned to 32 bits.
*/
@@ -173,8 +179,8 @@ static void __devexit mthca_buddy_cleanu
kfree(buddy->bits);
}
-static u32 mthca_alloc_mtt(struct mthca_dev *dev, int order,
- struct mthca_buddy *buddy)
+static u32 mthca_alloc_mtt_range(struct mthca_dev *dev, int order,
+ struct mthca_buddy *buddy)
{
u32 seg = mthca_buddy_alloc(buddy, order);
@@ -191,12 +197,100 @@ static u32 mthca_alloc_mtt(struct mthca_
return seg;
}
-static void mthca_free_mtt(struct mthca_dev *dev, u32 seg, int order,
- struct mthca_buddy* buddy)
+static struct mthca_mtt *__mthca_alloc_mtt(struct mthca_dev *dev, int size,
+ struct mthca_buddy *buddy)
+{
+ struct mthca_mtt *mtt;
+ int i;
+
+ if (size <= 0)
+ return ERR_PTR(-EINVAL);
+
+ mtt = kmalloc(sizeof *mtt, GFP_KERNEL);
+ if (!mtt)
+ return ERR_PTR(-ENOMEM);
+
+ mtt->buddy = buddy;
+ mtt->order = 0;
+ for (i = MTHCA_MTT_SEG_SIZE / 8; i < size; i <<= 1)
+ ++mtt->order;
+
+ mtt->first_seg = mthca_alloc_mtt_range(dev, mtt->order, buddy);
+ if (mtt->first_seg == -1) {
+ kfree(mtt);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ return mtt;
+}
+
+struct mthca_mtt *mthca_alloc_mtt(struct mthca_dev *dev, int size)
+{
+ return __mthca_alloc_mtt(dev, size, &dev->mr_table.mtt_buddy);
+}
+
+void mthca_free_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt)
+{
+ if (!mtt)
+ return;
+
+ mthca_buddy_free(mtt->buddy, mtt->first_seg, mtt->order);
+
+ mthca_table_put_range(dev, dev->mr_table.mtt_table,
+ mtt->first_seg,
+ mtt->first_seg + (1 << mtt->order) - 1);
+
+ kfree(mtt);
+}
+
+int mthca_write_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt,
+ int start_index, u64 *buffer_list, int list_len)
{
- mthca_buddy_free(buddy, seg, order);
- mthca_table_put_range(dev, dev->mr_table.mtt_table, seg,
- seg + (1 << order) - 1);
+ u64 *mtt_entry;
+ int err = 0;
+ u8 status;
+ int i;
+
+ mtt_entry = (u64 *) __get_free_page(GFP_KERNEL);
+ if (!mtt_entry)
+ return -ENOMEM;
+
+ while (list_len > 0) {
+ mtt_entry[0] = cpu_to_be64(dev->mr_table.mtt_base +
+ mtt->first_seg * MTHCA_MTT_SEG_SIZE +
+ start_index * 8);
+ mtt_entry[1] = 0;
+ for (i = 0; i < list_len && i < PAGE_SIZE / 8 - 2; ++i)
+ mtt_entry[i + 2] = cpu_to_be64(buffer_list[i] |
+ MTHCA_MTT_FLAG_PRESENT);
+
+ /*
+ * If we have an odd number of entries to write, add
+ * one more dummy entry for firmware efficiency.
+ */
+ if (i & 1)
+ mtt_entry[i + 2] = 0;
+
+ err = mthca_WRITE_MTT(dev, mtt_entry, (i + 1) & ~1, &status);
+ if (err) {
+ mthca_warn(dev, "WRITE_MTT failed (%d)\n", err);
+ goto out;
+ }
+ if (status) {
+ mthca_warn(dev, "WRITE_MTT returned status 0x%02x\n",
+ status);
+ err = -EINVAL;
+ goto out;
+ }
+
+ list_len -= i;
+ start_index += i;
+ buffer_list += i;
+ }
+
+out:
+ free_page((unsigned long) mtt_entry);
+ return err;
}
static inline u32 tavor_hw_index_to_key(u32 ind)
@@ -235,18 +329,20 @@ static inline u32 key_to_hw_index(struct
return tavor_key_to_hw_index(key);
}
-int mthca_mr_alloc_notrans(struct mthca_dev *dev, u32 pd,
- u32 access, struct mthca_mr *mr)
+int mthca_mr_alloc(struct mthca_dev *dev, u32 pd, int buffer_size_shift,
+ u64 iova, u64 total_size, u32 access, struct mthca_mr *mr)
{
- void *mailbox = NULL;
+ void *mailbox;
struct mthca_mpt_entry *mpt_entry;
u32 key;
+ int i;
int err;
u8 status;
might_sleep();
- mr->order = -1;
+ WARN_ON(buffer_size_shift >= 32);
+
key = mthca_alloc(&dev->mr_table.mpt_alloc);
if (key == -1)
return -ENOMEM;
@@ -268,186 +364,98 @@ int mthca_mr_alloc_notrans(struct mthca_
mpt_entry->flags = cpu_to_be32(MTHCA_MPT_FLAG_SW_OWNS |
MTHCA_MPT_FLAG_MIO |
- MTHCA_MPT_FLAG_PHYSICAL |
MTHCA_MPT_FLAG_REGION |
access);
- mpt_entry->page_size = 0;
+ if (!mr->mtt)
+ mpt_entry->flags |= cpu_to_be32(MTHCA_MPT_FLAG_PHYSICAL);
+
+ mpt_entry->page_size = cpu_to_be32(buffer_size_shift - 12);
mpt_entry->key = cpu_to_be32(key);
mpt_entry->pd = cpu_to_be32(pd);
- mpt_entry->start = 0;
- mpt_entry->length = ~0ULL;
+ mpt_entry->start = cpu_to_be64(iova);
+ mpt_entry->length = cpu_to_be64(total_size);
memset(&mpt_entry->lkey, 0,
sizeof *mpt_entry - offsetof(struct mthca_mpt_entry, lkey));
+ if (mr->mtt)
+ mpt_entry->mtt_seg =
+ cpu_to_be64(dev->mr_table.mtt_base +
+ mr->mtt->first_seg * MTHCA_MTT_SEG_SIZE);
+
+ 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_table;
+ goto err_out_mailbox;
} else if (status) {
mthca_warn(dev, "SW2HW_MPT returned status 0x%02x\n",
status);
err = -EINVAL;
- goto err_out_table;
+ goto err_out_mailbox;
}
kfree(mailbox);
return err;
+err_out_mailbox:
+ kfree(mailbox);
+
err_out_table:
mthca_table_put(dev, dev->mr_table.mpt_table, key);
err_out_mpt_free:
mthca_free(&dev->mr_table.mpt_alloc, key);
- kfree(mailbox);
return err;
}
+int mthca_mr_alloc_notrans(struct mthca_dev *dev, u32 pd,
+ u32 access, struct mthca_mr *mr)
+{
+ mr->mtt = NULL;
+ return mthca_mr_alloc(dev, pd, 12, 0, ~0ULL, access, mr);
+}
+
int mthca_mr_alloc_phys(struct mthca_dev *dev, u32 pd,
u64 *buffer_list, int buffer_size_shift,
int list_len, u64 iova, u64 total_size,
u32 access, struct mthca_mr *mr)
{
- void *mailbox;
- u64 *mtt_entry;
- struct mthca_mpt_entry *mpt_entry;
- u32 key;
- int err = -ENOMEM;
- u8 status;
- int i;
-
- might_sleep();
- WARN_ON(buffer_size_shift >= 32);
-
- key = mthca_alloc(&dev->mr_table.mpt_alloc);
- if (key == -1)
- return -ENOMEM;
- mr->ibmr.rkey = mr->ibmr.lkey = hw_index_to_key(dev, key);
-
- if (mthca_is_memfree(dev)) {
- err = mthca_table_get(dev, dev->mr_table.mpt_table, key);
- if (err)
- goto err_out_mpt_free;
- }
-
- 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.mtt_buddy);
- if (mr->first_seg == -1)
- goto err_out_table;
-
- /*
- * If list_len is odd, we add one more dummy entry for
- * firmware efficiency.
- */
- mailbox = kmalloc(max(sizeof *mpt_entry,
- (size_t) 8 * (list_len + (list_len & 1) + 2)) +
- MTHCA_CMD_MAILBOX_EXTRA,
- GFP_KERNEL);
- if (!mailbox)
- goto err_out_free_mtt;
-
- mtt_entry = MAILBOX_ALIGN(mailbox);
+ int err;
- mtt_entry[0] = cpu_to_be64(dev->mr_table.mtt_base +
- mr->first_seg * MTHCA_MTT_SEG_SIZE);
- mtt_entry[1] = 0;
- for (i = 0; i < list_len; ++i)
- mtt_entry[i + 2] = cpu_to_be64(buffer_list[i] |
- MTHCA_MTT_FLAG_PRESENT);
- if (list_len & 1) {
- mtt_entry[i + 2] = 0;
- ++list_len;
- }
+ mr->mtt = mthca_alloc_mtt(dev, list_len);
+ if (IS_ERR(mr->mtt))
+ return PTR_ERR(mr->mtt);
- if (0) {
- mthca_dbg(dev, "Dumping MPT entry\n");
- for (i = 0; i < list_len + 2; ++i)
- printk(KERN_ERR "[%2d] %016llx\n",
- i, (unsigned long long) be64_to_cpu(mtt_entry[i]));
- }
-
- err = mthca_WRITE_MTT(dev, mtt_entry, list_len, &status);
+ err = mthca_write_mtt(dev, mr->mtt, 0, buffer_list, list_len);
if (err) {
- mthca_warn(dev, "WRITE_MTT failed (%d)\n", err);
- goto err_out_mailbox_free;
- }
- if (status) {
- mthca_warn(dev, "WRITE_MTT returned status 0x%02x\n",
- status);
- err = -EINVAL;
- goto err_out_mailbox_free;
- }
-
- 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(buffer_size_shift - 12);
- mpt_entry->key = cpu_to_be32(key);
- mpt_entry->pd = cpu_to_be32(pd);
- mpt_entry->start = cpu_to_be64(iova);
- mpt_entry->length = cpu_to_be64(total_size);
- memset(&mpt_entry->lkey, 0,
- sizeof *mpt_entry - offsetof(struct mthca_mpt_entry, lkey));
- mpt_entry->mtt_seg = cpu_to_be64(dev->mr_table.mtt_base +
- mr->first_seg * MTHCA_MTT_SEG_SIZE);
-
- 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");
- }
+ mthca_free_mtt(dev, mr->mtt);
+ return err;
}
- err = mthca_SW2HW_MPT(dev, mpt_entry,
- key & (dev->limits.num_mpts - 1),
- &status);
+ err = mthca_mr_alloc(dev, pd, buffer_size_shift, iova,
+ total_size, access, mr);
if (err)
- mthca_warn(dev, "SW2HW_MPT failed (%d)\n", err);
- else if (status) {
- mthca_warn(dev, "SW2HW_MPT returned status 0x%02x\n",
- status);
- err = -EINVAL;
- }
+ mthca_free_mtt(dev, mr->mtt);
- kfree(mailbox);
- return err;
-
-err_out_mailbox_free:
- kfree(mailbox);
-
-err_out_free_mtt:
- mthca_free_mtt(dev, mr->first_seg, mr->order, &dev->mr_table.mtt_buddy);
-
-err_out_table:
- mthca_table_put(dev, dev->mr_table.mpt_table, key);
-
-err_out_mpt_free:
- mthca_free(&dev->mr_table.mpt_alloc, key);
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)
+static void mthca_free_region(struct mthca_dev *dev, u32 lkey)
{
- if (order >= 0)
- mthca_free_mtt(dev, first_seg, order, buddy);
-
mthca_table_put(dev, dev->mr_table.mpt_table,
arbel_key_to_hw_index(lkey));
@@ -471,8 +479,8 @@ void mthca_free_mr(struct mthca_dev *dev
mthca_warn(dev, "HW2SW_MPT returned status 0x%02x\n",
status);
- mthca_free_region(dev, mr->ibmr.lkey, mr->order, mr->first_seg,
- &dev->mr_table.mtt_buddy);
+ mthca_free_region(dev, mr->ibmr.lkey);
+ mthca_free_mtt(dev, mr->mtt);
}
int mthca_fmr_alloc(struct mthca_dev *dev, u32 pd,
@@ -517,21 +525,15 @@ int mthca_fmr_alloc(struct mthca_dev *de
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)
+ mr->mtt = __mthca_alloc_mtt(dev, list_len, dev->mr_table.fmr_mtt_buddy);
+ if (IS_ERR(mr->mtt))
goto err_out_table;
- mtt_seg = mr->first_seg * MTHCA_MTT_SEG_SIZE;
+ mtt_seg = mr->mtt->first_seg * MTHCA_MTT_SEG_SIZE;
if (mthca_is_memfree(dev)) {
mr->mem.arbel.mtts = mthca_table_find(dev->mr_table.mtt_table,
- mr->first_seg);
+ mr->mtt->first_seg);
BUG_ON(!mr->mem.arbel.mtts);
} else
mr->mem.tavor.mtts = dev->mr_table.tavor_fmr.mtt_base + mtt_seg;
@@ -587,8 +589,7 @@ 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);
+ mthca_free_mtt(dev, mr->mtt);
err_out_table:
mthca_table_put(dev, dev->mr_table.mpt_table, key);
@@ -603,8 +604,9 @@ int mthca_free_fmr(struct mthca_dev *dev
if (fmr->maps)
return -EBUSY;
- mthca_free_region(dev, fmr->ibmr.lkey, fmr->order, fmr->first_seg,
- dev->mr_table.fmr_mtt_buddy);
+ mthca_free_region(dev, fmr->ibmr.lkey);
+ mthca_free_mtt(dev, fmr->mtt);
+
return 0;
}
@@ -820,7 +822,8 @@ int __devinit mthca_init_mr_table(struct
if (dev->limits.reserved_mtts) {
i = fls(dev->limits.reserved_mtts - 1);
- if (mthca_alloc_mtt(dev, i, dev->mr_table.fmr_mtt_buddy) == -1) {
+ if (mthca_alloc_mtt_range(dev, i,
+ dev->mr_table.fmr_mtt_buddy) == -1) {
mthca_warn(dev, "MTT table of order %d is too small.\n",
dev->mr_table.fmr_mtt_buddy->max_order);
err = -ENOMEM;
--- linux.git.orig/drivers/infiniband/hw/mthca/mthca_provider.h 2005-06-23 13:03:01.490794374 -0700
+++ linux.git/drivers/infiniband/hw/mthca/mthca_provider.h 2005-06-23 13:03:07.308535271 -0700
@@ -54,18 +54,18 @@ struct mthca_uar {
int index;
};
+struct mthca_mtt;
+
struct mthca_mr {
- struct ib_mr ibmr;
- int order;
- u32 first_seg;
+ struct ib_mr ibmr;
+ struct mthca_mtt *mtt;
};
struct mthca_fmr {
- struct ib_fmr ibmr;
+ struct ib_fmr ibmr;
struct ib_fmr_attr attr;
- int order;
- u32 first_seg;
- int maps;
+ struct mthca_mtt *mtt;
+ int maps;
union {
struct {
struct mthca_mpt_entry __iomem *mpt;
-
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