/*
* Copyright (c) 2004 Topspin Communications. All rights reserved.
* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/slab.h>
#include <linux/errno.h>
#include "mthca_dev.h"
#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.
*/
struct mthca_mpt_entry {
__be32 flags;
__be32 page_size;
__be32 key;
__be32 pd;
__be64 start;
__be64 length;
__be32 lkey;
__be32 window_count;
__be32 window_count_limit;
__be64 mtt_seg;
__be32 mtt_sz; /* Arbel only */
u32 reserved[2];
} __attribute__((packed));
#define MTHCA_MPT_FLAG_SW_OWNS (0xfUL << 28)
#define MTHCA_MPT_FLAG_MIO (1 << 17)
#define MTHCA_MPT_FLAG_BIND_ENABLE (1 << 15)
#define MTHCA_MPT_FLAG_PHYSICAL (1 << 9)
#define MTHCA_MPT_FLAG_REGION (1 << 8)
#define MTHCA_MTT_FLAG_PRESENT 1
#define MTHCA_MPT_STATUS_SW 0xF0
#define MTHCA_MPT_STATUS_HW 0x00
#define SINAI_FMR_KEY_INC 0x1000000
/*
* Buddy allocator for MTT segments (currently not very efficient
* since it doesn't keep a free list and just searches linearly
* through the bitmaps)
*/
static u32 mthca_buddy_alloc(struct mthca_buddy *buddy, int order)
{
int o;
int m;
u32 seg;
spin_lock(&buddy->lock);
for (o = order; o <= buddy->max_order; ++o)
if (buddy->num_free[o]) {
m = 1 << (buddy->max_order - o);
seg = find_first_bit(buddy->bits[o], m);
if (seg < m)
goto found;
}
spin_unlock(&buddy->lock);
return -1;
found:
clear_bit(seg, buddy->bits[o]);
--buddy->num_free[o];
while (o > order) {
--o;
seg <<= 1;
set_bit(seg ^ 1, buddy->bits[o]);
++buddy->num_free[o];
}
spin_unlock(&buddy->lock);
seg <<= order;
return seg;
}
static void mthca_buddy_free(struct mthca_buddy *buddy, u32 seg, int order)
{
seg >>= order;
spin_lock(&buddy->lock);
while (test_bit(seg ^ 1, buddy->bits[order])) {
clear_bit(seg ^ 1, buddy->bits[order]);
--buddy->num_free[order];
seg >>= 1;
++order;
}
set_bit(seg, buddy->bits[order]);
++buddy->num_free[order];
spin_unlock(&buddy->lock);
}
static int mthca_buddy_init(struct mthca_buddy *buddy, int max_order)
{
int i, s;
buddy->max_order = max_order;
spin_lock_init(&buddy->lock);
buddy->bits = kzalloc((buddy->max_order + 1) * sizeof (long *),
GFP_KERNEL);
buddy->num_free = kcalloc((buddy->max_order + 1), sizeof *buddy->num_free,
GFP_KERNEL);
if (!buddy->bits || !buddy->num_free)
goto err_out;
for (i = 0; i <= buddy->max_order; ++i) {
s = BITS_TO_LONGS(1 << (buddy->max_order - i));
buddy->bits[i] = kmalloc(s * sizeof (long), GFP_KERNEL);
if (!buddy->bits[i])
goto err_out_free;
bitmap_zero(buddy->bits[i],
1 << (buddy->max_order - i));
}
set_bit(0, buddy->bits[buddy->max_order]);
buddy->num_free[buddy->max_order] = 1;
return 0;
err_out_free:
for (i = 0; i <= buddy->max_order; ++i)
kfree(buddy->bits[i]);
err_out:
kfree(buddy->bits);
kfree(buddy->num_free);
return -ENOMEM;
}
static void mthca_buddy_cleanup(struct mthca_buddy *buddy)
{
int i;
for (i = 0; i <= buddy->max_order; ++i)
kfree(buddy->bits[i]);
kfree(buddy->bits);
kfree(buddy->num_free);
}
static u32 mthca_alloc_mtt_range(struct mthca_dev *dev, int order,
struct mthca_buddy *buddy)
{
u32 seg = mthca_buddy_alloc(buddy, order);
if (seg == -1)
return -1;
if (mthca_is_memfree(dev))
if (mthca_table_get_range(dev, dev->mr_table.mtt_table, seg,
seg + (1 << order) - 1)) {
mthca_buddy_free(buddy, seg, order);
seg = -1;
}
return seg;
}
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 = dev->limits.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);
}
static int __mthca_write_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt,
int start_index, u64 *buffer_list, int list_len)
{
struct mthca_mailbox *mailbox;
__be64 *mtt_entry;
int err = 0;
int i;
mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
if (IS_ERR(mailbox))
return PTR_ERR(mailbox);
mtt_entry = mailbox->buf;
while (list_len > 0) {
mtt_entry[0] = cpu_to_be64(dev->mr_table.mtt_base +
mtt->first_seg * dev->limits.mtt_seg_size +
start_index * 8);
mtt_entry[1] = 0;
for (i = 0; i < list_len && i < MTHCA_MAILBOX_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, mailbox, (i + 1) & ~1);
if (err) {
mthca_warn(dev, "WRITE_MTT failed (%d)\n", err);
goto out;
}
list_len -= i;
start_index += i;
buffer_list += i;
}
out:
mthca_free_mailbox(dev, mailbox);
return err;
}
int mthca_write_mtt_size(struct mthca_dev *dev)
{
if (dev->mr_table.fmr_mtt_buddy != &dev->mr_table.mtt_buddy ||
!(dev->mthca_flags & MTHCA_FLAG_FMR))
/*
* Be friendly to WRITE_MTT command
* and leave two empty slots for the
* index and reserved fields of the
* mailbox.
*/
return PAGE_SIZE / sizeof (u64) - 2;
/* For Arbel, all MTTs must fit in the same page. */
return mthca_is_memfree(dev) ? (PAGE_SIZE / sizeof (u64)) : 0x7ffffff;
}
static void mthca_tavor_write_mtt_seg(struct mthca_dev *dev,
struct mthca_mtt *mtt, int start_index,
u64 *buffer_list, int list_len)
{
u64 __iomem *mtts;
int i;
mtts = dev->mr_table.tavor_fmr.mtt_base + mtt->first_seg * dev->limits.mtt_seg_size +
start_index * sizeof (u64);
for (i = 0; i < list_len; ++i)
mthca_write64_raw(cpu_to_be64(buffer_list[i] | MTHCA_MTT_FLAG_PRESENT),
mtts + i);
}
static void mthca_arbel_write_mtt_seg(struct mthca_dev *dev,
struct mthca_mtt *mtt, int start_index,
u64 *buffer_list, int list_len)
{
__be64 *mtts;
dma_addr_t dma_handle;
int i;
int s = start_index * sizeof (u64);
/* For Arbel, all MTTs must fit in the same page. */
BUG_ON(s / PAGE_SIZE != (s + list_len * sizeof(u64) - 1) / PAGE_SIZE);
/* Require full segments */
BUG_ON(s % dev->limits.mtt_seg_size);
mtts = mthca_table_find(dev->mr_table.mtt_table, mtt->first_seg +
s / dev->limits.mtt_seg_size, &dma_handle);
BUG_ON(!mtts);
dma_sync_single_for_cpu(&dev->pdev->dev, dma_handle,
list_len * sizeof (u64), DMA_TO_DEVICE);
for (i = 0; i < list_len; ++i)
mtts[i] = cpu_to_be64(buffer_list[i] | MTHCA_MTT_FLAG_PRESENT);
dma_sync_single_for_device(&dev->pdev->dev, dma_handle,
list_len * sizeof (u64), DMA_TO_DEVICE);
}
int mthca_write_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt,
int start_index, u64 *buffer_list, int list_len)
{
int size = mthca_write_mtt_size(dev);
int chunk;
if (dev->mr_table.fmr_mtt_buddy != &dev->mr_table.mtt_buddy ||
!(dev->mthca_flags & MTHCA_FLAG_FMR))
return __mthca_write_mtt(dev, mtt, start_index, buffer_list, list_len);
while (list_len > 0) {
chunk = min(size, list_len);
if (mthca_is_memfree(dev))
mthca_arbel_write_mtt_seg(dev, mtt, start_index,
buffer_list, chunk);
else
mthca_tavor_write_mtt_seg(dev, mtt, start_index,
buffer_list, chunk);
list_len -= chunk;
start_index += chunk;
buffer_list += chunk;
}
return 0;
}
static inline u32 tavor_hw_index_to_key(u32 ind)
{
return ind;
}
static inline u32 tavor_key_to_hw_index(u32 key)
{
return key;
}
static inline u32 arbel_hw_index_to_key(u32 ind)
{
return (ind >> 24) | (ind << 8);
}
static inline u32 arbel_key_to_hw_index(u32 key)
{
return (key << 24) | (key >> 8);
}
static inline u32 hw_index_to_key(struct mthca_dev *dev, u32 ind)
{
if (mthca_is_memfree(dev))
return arbel_hw_index_to_key(ind);
else
return tavor_hw_index_to_key(ind);
}
static inline u32 key_to_hw_index(struct mthca_dev *dev, u32 key)
{
if (mthca_is_memfree(dev))
return arbel_key_to_hw_index(key);
else
return tavor_key_to_hw_index(key);
}
static inline u32 adjust_key(struct mthca_dev *dev, u32 key)
{
if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
return ((key << 20) & 0x800000) | (key & 0x7fffff);
else
return key;
}
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)
{
struct mthca_mailbox *mailbox;
struct mthca_mpt_entry *mpt_entry;
u32 key;
int i;
int err;
WARN_ON(buffer_size_shift >= 32);
key = mthca_alloc(&dev->mr_table.mpt_alloc);
if (key == -1)
return -ENOMEM;
key = adjust_key(dev, key);
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;
}
mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
if (IS_ERR(mailbox)) {
err = PTR_ERR(mailbox);
goto err_out_table;
}
mpt_entry = mailbox->buf;
mpt_entry->flags = cpu_to_be32(MTHCA_MPT_FLAG_SW_OWNS |
MTHCA_MPT_FLAG_MIO |
MTHCA_MPT_FLAG_REGION |
access);
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 = 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 * dev->limits.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(((__be32 *) mpt_entry)[i]));
if ((i + 1) % 4 == 0)
printk("\n");
}
}
err = mthca_SW2HW_MPT(dev, mailbox,
key & (dev->limits.num_mpts - 1));
if (err) {
mthca_warn(dev, "SW2HW_MPT failed (%d)\n", err);
goto err_out_mailbox;
}
mthca_free_mailbox(dev, mailbox);
return err;
err_out_mailbox:
mthca_free_mailbox(dev, 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);
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)
{
int err;
mr->mtt = mthca_alloc_mtt(dev, list_len);
if (IS_ERR(mr->mtt))
return PTR_ERR(mr->mtt);
err = mthca_write_mtt(dev, mr->mtt, 0, buffer_list, list_len);
if (err) {
mthca_free_mtt(dev, mr->mtt);
return err;
}
err = mthca_mr_alloc(dev, pd, buffer_size_shift, iova,
total_size, access, mr);
if (err)
mthca_free_mtt(dev, mr->mtt);
return err;
}
/* Free mr or fmr */
static void mthca_free_region(struct mthca_dev *dev, u32 lkey)
{
mthca_table_put(dev, dev->mr_table.mpt_table,
key_to_hw_index(dev, 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;
err = mthca_HW2SW_MPT(dev, NULL,
key_to_hw_index(dev, mr->ibmr.lkey) &
(dev->limits.num_mpts - 1));
if (err)
mthca_warn(dev, "HW2SW_MPT failed (%d)\n", err);
mthca_free_region(dev, mr->ibmr.lkey);
mthca_free_mtt(dev, mr->mtt);
}
int mthca_fmr_alloc(struct mthca_dev *dev, u32 pd,
u32 access, struct mthca_fmr *mr)
{
struct mthca_mpt_entry *mpt_entry;
struct mthca_mailbox *mailbox;
u64 mtt_seg;
u32 key, idx;
int list_len = mr->attr.max_pages;
int err = -ENOMEM;
int i;
if (mr->attr.page_shift < 12 || mr->attr.page_shift >= 32)
return -EINVAL;
/* For Arbel, all MTTs must fit in the same page. */
if (mthca_is_memfree(dev) &&
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;
key = adjust_key(dev, key);
idx = key & (dev->limits.num_mpts - 1);
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;
mr->mem.arbel.mpt = mthca_table_find(dev->mr_table.mpt_table, key, NULL);
BUG_ON(!mr->mem.arbel.mpt);
} else
mr->mem.tavor.mpt = dev->mr_table.tavor_fmr.mpt_base +
sizeof *(mr->mem.tavor.mpt) * idx;
mr->mtt = __mthca_alloc_mtt(dev, list_len, dev->mr_table.fmr_mtt_buddy);
if (IS_ERR(mr->mtt)) {
err = PTR_ERR(mr->mtt);
goto err_out_table;
}
mtt_seg = mr->mtt->first_seg * dev->limits.mtt_seg_size;
if (mthca_is_memfree(dev)) {
mr->mem.arbel.mtts = mthca_table_find(dev->mr_table.mtt_table,
mr->mtt->first_seg,
&mr->mem.arbel.dma_handle);
BUG_ON(!mr->mem.arbel.mtts);
} else
mr->mem.tavor.mtts = dev->mr_table.tavor_fmr.mtt_base + mtt_seg;
mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
if (IS_ERR(mailbox)) {
err = PTR_ERR(mailbox);
goto err_out_free_mtt;
}
mpt_entry = mailbox->buf;
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_shift - 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(((__be32 *) mpt_entry)[i]));
if ((i + 1) % 4 == 0)
printk("\n");
}
}
err = mthca_SW2HW_MPT(dev, mailbox,
key & (dev->limits.num_mpts - 1));
if (err) {
mthca_warn(dev, "SW2HW_MPT failed (%d)\n", err);
goto err_out_mailbox_free;
}
mthca_free_mailbox(dev, mailbox);
return 0;
err_out_mailbox_free:
mthca_free_mailbox(dev, mailbox);
err_out_free_mtt:
mthca_free_mtt(dev, mr->mtt);
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;
}
int mthca_free_fmr(struct mthca_dev *dev, struct mthca_fmr *fmr)
{
if (fmr->maps)
return -EBUSY;
mthca_free_region(dev, fmr->ibmr.lkey);
mthca_free_mtt(dev, fmr->mtt);
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_shift) - 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_shift));
mpt_entry.start = cpu_to_be64(iova);
__raw_writel((__force u32) 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);
if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
key += SINAI_FMR_KEY_INC;
else
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();
dma_sync_single_for_cpu(&dev->pdev->dev, fmr->mem.arbel.dma_handle,
list_len * sizeof(u64), DMA_TO_DEVICE);
for (i = 0; i < list_len; ++i)
fmr->mem.arbel.mtts[i] = cpu_to_be64(page_list[i] |
MTHCA_MTT_FLAG_PRESENT);
dma_sync_single_for_device(&dev->pdev->dev, fmr->mem.arbel.dma_handle,
list_len * sizeof(u64), DMA_TO_DEVICE);
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_shift));
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)
{
if (!fmr->maps)
return;
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)
{
if (!fmr->maps)
return;
fmr->maps = 0;
*(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_SW;
}
int mthca_init_mr_table(struct mthca_dev *dev)
{
phys_addr_t addr;
int mpts, mtts, err, i;
err = mthca_alloc_init(&dev->mr_table.mpt_alloc,
dev->limits.num_mpts,
~0, dev->limits.reserved_mrws);
if (err)
return err;
if (!mthca_is_memfree(dev) &&
(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN))
dev->limits.fmr_reserved_mtts = 0;
else
dev->mthca_flags |= MTHCA_FLAG_FMR;
if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
mthca_dbg(dev, "Memory key throughput optimization activated.\n");
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;
}
mpts = mtts = 1 << i;
} else {
mtts = dev->limits.num_mtt_segs;
mpts = dev->limits.num_mpts;
}
if (!mthca_is_memfree(dev) &&
(dev->mthca_flags & MTHCA_FLAG_FMR)) {
addr = pci_resource_start(dev->pdev, 4) +
((pci_resource_len(dev->pdev, 4) - 1) &
dev->mr_table.mpt_base);
dev->mr_table.tavor_fmr.mpt_base =
ioremap(addr, mpts * 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;
}
addr = pci_resource_start(dev->pdev, 4) +
((pci_resource_len(dev->pdev, 4) - 1) &
dev->mr_table.mtt_base);
dev->mr_table.tavor_fmr.mtt_base =
ioremap(addr, mtts * dev->limits.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;
}
}
if (dev->limits.fmr_reserved_mtts) {
err = mthca_buddy_init(&dev->mr_table.tavor_fmr.mtt_buddy, fls(mtts - 1));
if (err)
goto err_fmr_mtt_buddy;
/* Prevent regular MRs from using FMR keys */
err = mthca_buddy_alloc(&dev->mr_table.mtt_buddy, fls(mtts - 1));
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) {
i = fls(dev->limits.reserved_mtts - 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;
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);
return err;
}
void 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);
}