linux/drivers/infiniband/hw/mlx5/mr.c

1080 lines
24 KiB
C

/*
* Copyright (c) 2013, Mellanox Technologies inc. 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/kref.h>
#include <linux/random.h>
#include <linux/debugfs.h>
#include <linux/export.h>
#include <linux/delay.h>
#include <rdma/ib_umem.h>
#include "mlx5_ib.h"
enum {
MAX_PENDING_REG_MR = 8,
};
enum {
MLX5_UMR_ALIGN = 2048
};
static __be64 *mr_align(__be64 *ptr, int align)
{
unsigned long mask = align - 1;
return (__be64 *)(((unsigned long)ptr + mask) & ~mask);
}
static int order2idx(struct mlx5_ib_dev *dev, int order)
{
struct mlx5_mr_cache *cache = &dev->cache;
if (order < cache->ent[0].order)
return 0;
else
return order - cache->ent[0].order;
}
static void reg_mr_callback(int status, void *context)
{
struct mlx5_ib_mr *mr = context;
struct mlx5_ib_dev *dev = mr->dev;
struct mlx5_mr_cache *cache = &dev->cache;
int c = order2idx(dev, mr->order);
struct mlx5_cache_ent *ent = &cache->ent[c];
u8 key;
unsigned long flags;
spin_lock_irqsave(&ent->lock, flags);
ent->pending--;
spin_unlock_irqrestore(&ent->lock, flags);
if (status) {
mlx5_ib_warn(dev, "async reg mr failed. status %d\n", status);
kfree(mr);
dev->fill_delay = 1;
mod_timer(&dev->delay_timer, jiffies + HZ);
return;
}
if (mr->out.hdr.status) {
mlx5_ib_warn(dev, "failed - status %d, syndorme 0x%x\n",
mr->out.hdr.status,
be32_to_cpu(mr->out.hdr.syndrome));
kfree(mr);
dev->fill_delay = 1;
mod_timer(&dev->delay_timer, jiffies + HZ);
return;
}
spin_lock_irqsave(&dev->mdev.priv.mkey_lock, flags);
key = dev->mdev.priv.mkey_key++;
spin_unlock_irqrestore(&dev->mdev.priv.mkey_lock, flags);
mr->mmr.key = mlx5_idx_to_mkey(be32_to_cpu(mr->out.mkey) & 0xffffff) | key;
cache->last_add = jiffies;
spin_lock_irqsave(&ent->lock, flags);
list_add_tail(&mr->list, &ent->head);
ent->cur++;
ent->size++;
spin_unlock_irqrestore(&ent->lock, flags);
}
static int add_keys(struct mlx5_ib_dev *dev, int c, int num)
{
struct mlx5_mr_cache *cache = &dev->cache;
struct mlx5_cache_ent *ent = &cache->ent[c];
struct mlx5_create_mkey_mbox_in *in;
struct mlx5_ib_mr *mr;
int npages = 1 << ent->order;
int err = 0;
int i;
in = kzalloc(sizeof(*in), GFP_KERNEL);
if (!in)
return -ENOMEM;
for (i = 0; i < num; i++) {
if (ent->pending >= MAX_PENDING_REG_MR) {
err = -EAGAIN;
break;
}
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr) {
err = -ENOMEM;
break;
}
mr->order = ent->order;
mr->umred = 1;
mr->dev = dev;
in->seg.status = 1 << 6;
in->seg.xlt_oct_size = cpu_to_be32((npages + 1) / 2);
in->seg.qpn_mkey7_0 = cpu_to_be32(0xffffff << 8);
in->seg.flags = MLX5_ACCESS_MODE_MTT | MLX5_PERM_UMR_EN;
in->seg.log2_page_size = 12;
spin_lock_irq(&ent->lock);
ent->pending++;
spin_unlock_irq(&ent->lock);
err = mlx5_core_create_mkey(&dev->mdev, &mr->mmr, in,
sizeof(*in), reg_mr_callback,
mr, &mr->out);
if (err) {
mlx5_ib_warn(dev, "create mkey failed %d\n", err);
kfree(mr);
break;
}
}
kfree(in);
return err;
}
static void remove_keys(struct mlx5_ib_dev *dev, int c, int num)
{
struct mlx5_mr_cache *cache = &dev->cache;
struct mlx5_cache_ent *ent = &cache->ent[c];
struct mlx5_ib_mr *mr;
int err;
int i;
for (i = 0; i < num; i++) {
spin_lock_irq(&ent->lock);
if (list_empty(&ent->head)) {
spin_unlock_irq(&ent->lock);
return;
}
mr = list_first_entry(&ent->head, struct mlx5_ib_mr, list);
list_del(&mr->list);
ent->cur--;
ent->size--;
spin_unlock_irq(&ent->lock);
err = mlx5_core_destroy_mkey(&dev->mdev, &mr->mmr);
if (err)
mlx5_ib_warn(dev, "failed destroy mkey\n");
else
kfree(mr);
}
}
static ssize_t size_write(struct file *filp, const char __user *buf,
size_t count, loff_t *pos)
{
struct mlx5_cache_ent *ent = filp->private_data;
struct mlx5_ib_dev *dev = ent->dev;
char lbuf[20];
u32 var;
int err;
int c;
if (copy_from_user(lbuf, buf, sizeof(lbuf)))
return -EFAULT;
c = order2idx(dev, ent->order);
lbuf[sizeof(lbuf) - 1] = 0;
if (sscanf(lbuf, "%u", &var) != 1)
return -EINVAL;
if (var < ent->limit)
return -EINVAL;
if (var > ent->size) {
do {
err = add_keys(dev, c, var - ent->size);
if (err && err != -EAGAIN)
return err;
usleep_range(3000, 5000);
} while (err);
} else if (var < ent->size) {
remove_keys(dev, c, ent->size - var);
}
return count;
}
static ssize_t size_read(struct file *filp, char __user *buf, size_t count,
loff_t *pos)
{
struct mlx5_cache_ent *ent = filp->private_data;
char lbuf[20];
int err;
if (*pos)
return 0;
err = snprintf(lbuf, sizeof(lbuf), "%d\n", ent->size);
if (err < 0)
return err;
if (copy_to_user(buf, lbuf, err))
return -EFAULT;
*pos += err;
return err;
}
static const struct file_operations size_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.write = size_write,
.read = size_read,
};
static ssize_t limit_write(struct file *filp, const char __user *buf,
size_t count, loff_t *pos)
{
struct mlx5_cache_ent *ent = filp->private_data;
struct mlx5_ib_dev *dev = ent->dev;
char lbuf[20];
u32 var;
int err;
int c;
if (copy_from_user(lbuf, buf, sizeof(lbuf)))
return -EFAULT;
c = order2idx(dev, ent->order);
lbuf[sizeof(lbuf) - 1] = 0;
if (sscanf(lbuf, "%u", &var) != 1)
return -EINVAL;
if (var > ent->size)
return -EINVAL;
ent->limit = var;
if (ent->cur < ent->limit) {
err = add_keys(dev, c, 2 * ent->limit - ent->cur);
if (err)
return err;
}
return count;
}
static ssize_t limit_read(struct file *filp, char __user *buf, size_t count,
loff_t *pos)
{
struct mlx5_cache_ent *ent = filp->private_data;
char lbuf[20];
int err;
if (*pos)
return 0;
err = snprintf(lbuf, sizeof(lbuf), "%d\n", ent->limit);
if (err < 0)
return err;
if (copy_to_user(buf, lbuf, err))
return -EFAULT;
*pos += err;
return err;
}
static const struct file_operations limit_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.write = limit_write,
.read = limit_read,
};
static int someone_adding(struct mlx5_mr_cache *cache)
{
int i;
for (i = 0; i < MAX_MR_CACHE_ENTRIES; i++) {
if (cache->ent[i].cur < cache->ent[i].limit)
return 1;
}
return 0;
}
static void __cache_work_func(struct mlx5_cache_ent *ent)
{
struct mlx5_ib_dev *dev = ent->dev;
struct mlx5_mr_cache *cache = &dev->cache;
int i = order2idx(dev, ent->order);
int err;
if (cache->stopped)
return;
ent = &dev->cache.ent[i];
if (ent->cur < 2 * ent->limit && !dev->fill_delay) {
err = add_keys(dev, i, 1);
if (ent->cur < 2 * ent->limit) {
if (err == -EAGAIN) {
mlx5_ib_dbg(dev, "returned eagain, order %d\n",
i + 2);
queue_delayed_work(cache->wq, &ent->dwork,
msecs_to_jiffies(3));
} else if (err) {
mlx5_ib_warn(dev, "command failed order %d, err %d\n",
i + 2, err);
queue_delayed_work(cache->wq, &ent->dwork,
msecs_to_jiffies(1000));
} else {
queue_work(cache->wq, &ent->work);
}
}
} else if (ent->cur > 2 * ent->limit) {
if (!someone_adding(cache) &&
time_after(jiffies, cache->last_add + 300 * HZ)) {
remove_keys(dev, i, 1);
if (ent->cur > ent->limit)
queue_work(cache->wq, &ent->work);
} else {
queue_delayed_work(cache->wq, &ent->dwork, 300 * HZ);
}
}
}
static void delayed_cache_work_func(struct work_struct *work)
{
struct mlx5_cache_ent *ent;
ent = container_of(work, struct mlx5_cache_ent, dwork.work);
__cache_work_func(ent);
}
static void cache_work_func(struct work_struct *work)
{
struct mlx5_cache_ent *ent;
ent = container_of(work, struct mlx5_cache_ent, work);
__cache_work_func(ent);
}
static struct mlx5_ib_mr *alloc_cached_mr(struct mlx5_ib_dev *dev, int order)
{
struct mlx5_mr_cache *cache = &dev->cache;
struct mlx5_ib_mr *mr = NULL;
struct mlx5_cache_ent *ent;
int c;
int i;
c = order2idx(dev, order);
if (c < 0 || c >= MAX_MR_CACHE_ENTRIES) {
mlx5_ib_warn(dev, "order %d, cache index %d\n", order, c);
return NULL;
}
for (i = c; i < MAX_MR_CACHE_ENTRIES; i++) {
ent = &cache->ent[i];
mlx5_ib_dbg(dev, "order %d, cache index %d\n", ent->order, i);
spin_lock_irq(&ent->lock);
if (!list_empty(&ent->head)) {
mr = list_first_entry(&ent->head, struct mlx5_ib_mr,
list);
list_del(&mr->list);
ent->cur--;
spin_unlock_irq(&ent->lock);
if (ent->cur < ent->limit)
queue_work(cache->wq, &ent->work);
break;
}
spin_unlock_irq(&ent->lock);
queue_work(cache->wq, &ent->work);
if (mr)
break;
}
if (!mr)
cache->ent[c].miss++;
return mr;
}
static void free_cached_mr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
{
struct mlx5_mr_cache *cache = &dev->cache;
struct mlx5_cache_ent *ent;
int shrink = 0;
int c;
c = order2idx(dev, mr->order);
if (c < 0 || c >= MAX_MR_CACHE_ENTRIES) {
mlx5_ib_warn(dev, "order %d, cache index %d\n", mr->order, c);
return;
}
ent = &cache->ent[c];
spin_lock_irq(&ent->lock);
list_add_tail(&mr->list, &ent->head);
ent->cur++;
if (ent->cur > 2 * ent->limit)
shrink = 1;
spin_unlock_irq(&ent->lock);
if (shrink)
queue_work(cache->wq, &ent->work);
}
static void clean_keys(struct mlx5_ib_dev *dev, int c)
{
struct mlx5_mr_cache *cache = &dev->cache;
struct mlx5_cache_ent *ent = &cache->ent[c];
struct mlx5_ib_mr *mr;
int err;
cancel_delayed_work(&ent->dwork);
while (1) {
spin_lock_irq(&ent->lock);
if (list_empty(&ent->head)) {
spin_unlock_irq(&ent->lock);
return;
}
mr = list_first_entry(&ent->head, struct mlx5_ib_mr, list);
list_del(&mr->list);
ent->cur--;
ent->size--;
spin_unlock_irq(&ent->lock);
err = mlx5_core_destroy_mkey(&dev->mdev, &mr->mmr);
if (err)
mlx5_ib_warn(dev, "failed destroy mkey\n");
else
kfree(mr);
}
}
static int mlx5_mr_cache_debugfs_init(struct mlx5_ib_dev *dev)
{
struct mlx5_mr_cache *cache = &dev->cache;
struct mlx5_cache_ent *ent;
int i;
if (!mlx5_debugfs_root)
return 0;
cache->root = debugfs_create_dir("mr_cache", dev->mdev.priv.dbg_root);
if (!cache->root)
return -ENOMEM;
for (i = 0; i < MAX_MR_CACHE_ENTRIES; i++) {
ent = &cache->ent[i];
sprintf(ent->name, "%d", ent->order);
ent->dir = debugfs_create_dir(ent->name, cache->root);
if (!ent->dir)
return -ENOMEM;
ent->fsize = debugfs_create_file("size", 0600, ent->dir, ent,
&size_fops);
if (!ent->fsize)
return -ENOMEM;
ent->flimit = debugfs_create_file("limit", 0600, ent->dir, ent,
&limit_fops);
if (!ent->flimit)
return -ENOMEM;
ent->fcur = debugfs_create_u32("cur", 0400, ent->dir,
&ent->cur);
if (!ent->fcur)
return -ENOMEM;
ent->fmiss = debugfs_create_u32("miss", 0600, ent->dir,
&ent->miss);
if (!ent->fmiss)
return -ENOMEM;
}
return 0;
}
static void mlx5_mr_cache_debugfs_cleanup(struct mlx5_ib_dev *dev)
{
if (!mlx5_debugfs_root)
return;
debugfs_remove_recursive(dev->cache.root);
}
static void delay_time_func(unsigned long ctx)
{
struct mlx5_ib_dev *dev = (struct mlx5_ib_dev *)ctx;
dev->fill_delay = 0;
}
int mlx5_mr_cache_init(struct mlx5_ib_dev *dev)
{
struct mlx5_mr_cache *cache = &dev->cache;
struct mlx5_cache_ent *ent;
int limit;
int err;
int i;
cache->wq = create_singlethread_workqueue("mkey_cache");
if (!cache->wq) {
mlx5_ib_warn(dev, "failed to create work queue\n");
return -ENOMEM;
}
setup_timer(&dev->delay_timer, delay_time_func, (unsigned long)dev);
for (i = 0; i < MAX_MR_CACHE_ENTRIES; i++) {
INIT_LIST_HEAD(&cache->ent[i].head);
spin_lock_init(&cache->ent[i].lock);
ent = &cache->ent[i];
INIT_LIST_HEAD(&ent->head);
spin_lock_init(&ent->lock);
ent->order = i + 2;
ent->dev = dev;
if (dev->mdev.profile->mask & MLX5_PROF_MASK_MR_CACHE)
limit = dev->mdev.profile->mr_cache[i].limit;
else
limit = 0;
INIT_WORK(&ent->work, cache_work_func);
INIT_DELAYED_WORK(&ent->dwork, delayed_cache_work_func);
ent->limit = limit;
queue_work(cache->wq, &ent->work);
}
err = mlx5_mr_cache_debugfs_init(dev);
if (err)
mlx5_ib_warn(dev, "cache debugfs failure\n");
return 0;
}
int mlx5_mr_cache_cleanup(struct mlx5_ib_dev *dev)
{
int i;
dev->cache.stopped = 1;
flush_workqueue(dev->cache.wq);
mlx5_mr_cache_debugfs_cleanup(dev);
for (i = 0; i < MAX_MR_CACHE_ENTRIES; i++)
clean_keys(dev, i);
destroy_workqueue(dev->cache.wq);
del_timer_sync(&dev->delay_timer);
return 0;
}
struct ib_mr *mlx5_ib_get_dma_mr(struct ib_pd *pd, int acc)
{
struct mlx5_ib_dev *dev = to_mdev(pd->device);
struct mlx5_core_dev *mdev = &dev->mdev;
struct mlx5_create_mkey_mbox_in *in;
struct mlx5_mkey_seg *seg;
struct mlx5_ib_mr *mr;
int err;
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
in = kzalloc(sizeof(*in), GFP_KERNEL);
if (!in) {
err = -ENOMEM;
goto err_free;
}
seg = &in->seg;
seg->flags = convert_access(acc) | MLX5_ACCESS_MODE_PA;
seg->flags_pd = cpu_to_be32(to_mpd(pd)->pdn | MLX5_MKEY_LEN64);
seg->qpn_mkey7_0 = cpu_to_be32(0xffffff << 8);
seg->start_addr = 0;
err = mlx5_core_create_mkey(mdev, &mr->mmr, in, sizeof(*in), NULL, NULL,
NULL);
if (err)
goto err_in;
kfree(in);
mr->ibmr.lkey = mr->mmr.key;
mr->ibmr.rkey = mr->mmr.key;
mr->umem = NULL;
return &mr->ibmr;
err_in:
kfree(in);
err_free:
kfree(mr);
return ERR_PTR(err);
}
static int get_octo_len(u64 addr, u64 len, int page_size)
{
u64 offset;
int npages;
offset = addr & (page_size - 1);
npages = ALIGN(len + offset, page_size) >> ilog2(page_size);
return (npages + 1) / 2;
}
static int use_umr(int order)
{
return order <= 17;
}
static void prep_umr_reg_wqe(struct ib_pd *pd, struct ib_send_wr *wr,
struct ib_sge *sg, u64 dma, int n, u32 key,
int page_shift, u64 virt_addr, u64 len,
int access_flags)
{
struct mlx5_ib_dev *dev = to_mdev(pd->device);
struct ib_mr *mr = dev->umrc.mr;
sg->addr = dma;
sg->length = ALIGN(sizeof(u64) * n, 64);
sg->lkey = mr->lkey;
wr->next = NULL;
wr->send_flags = 0;
wr->sg_list = sg;
if (n)
wr->num_sge = 1;
else
wr->num_sge = 0;
wr->opcode = MLX5_IB_WR_UMR;
wr->wr.fast_reg.page_list_len = n;
wr->wr.fast_reg.page_shift = page_shift;
wr->wr.fast_reg.rkey = key;
wr->wr.fast_reg.iova_start = virt_addr;
wr->wr.fast_reg.length = len;
wr->wr.fast_reg.access_flags = access_flags;
wr->wr.fast_reg.page_list = (struct ib_fast_reg_page_list *)pd;
}
static void prep_umr_unreg_wqe(struct mlx5_ib_dev *dev,
struct ib_send_wr *wr, u32 key)
{
wr->send_flags = MLX5_IB_SEND_UMR_UNREG;
wr->opcode = MLX5_IB_WR_UMR;
wr->wr.fast_reg.rkey = key;
}
void mlx5_umr_cq_handler(struct ib_cq *cq, void *cq_context)
{
struct mlx5_ib_mr *mr;
struct ib_wc wc;
int err;
while (1) {
err = ib_poll_cq(cq, 1, &wc);
if (err < 0) {
pr_warn("poll cq error %d\n", err);
return;
}
if (err == 0)
break;
mr = (struct mlx5_ib_mr *)(unsigned long)wc.wr_id;
mr->status = wc.status;
complete(&mr->done);
}
ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
}
static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem,
u64 virt_addr, u64 len, int npages,
int page_shift, int order, int access_flags)
{
struct mlx5_ib_dev *dev = to_mdev(pd->device);
struct device *ddev = dev->ib_dev.dma_device;
struct umr_common *umrc = &dev->umrc;
struct ib_send_wr wr, *bad;
struct mlx5_ib_mr *mr;
struct ib_sge sg;
int size = sizeof(u64) * npages;
int err;
int i;
for (i = 0; i < 1; i++) {
mr = alloc_cached_mr(dev, order);
if (mr)
break;
err = add_keys(dev, order2idx(dev, order), 1);
if (err && err != -EAGAIN) {
mlx5_ib_warn(dev, "add_keys failed, err %d\n", err);
break;
}
}
if (!mr)
return ERR_PTR(-EAGAIN);
mr->pas = kmalloc(size + MLX5_UMR_ALIGN - 1, GFP_KERNEL);
if (!mr->pas) {
err = -ENOMEM;
goto error;
}
mlx5_ib_populate_pas(dev, umem, page_shift,
mr_align(mr->pas, MLX5_UMR_ALIGN), 1);
mr->dma = dma_map_single(ddev, mr_align(mr->pas, MLX5_UMR_ALIGN), size,
DMA_TO_DEVICE);
if (dma_mapping_error(ddev, mr->dma)) {
kfree(mr->pas);
err = -ENOMEM;
goto error;
}
memset(&wr, 0, sizeof(wr));
wr.wr_id = (u64)(unsigned long)mr;
prep_umr_reg_wqe(pd, &wr, &sg, mr->dma, npages, mr->mmr.key, page_shift, virt_addr, len, access_flags);
/* We serialize polls so one process does not kidnap another's
* completion. This is not a problem since wr is completed in
* around 1 usec
*/
down(&umrc->sem);
init_completion(&mr->done);
err = ib_post_send(umrc->qp, &wr, &bad);
if (err) {
mlx5_ib_warn(dev, "post send failed, err %d\n", err);
up(&umrc->sem);
goto error;
}
wait_for_completion(&mr->done);
up(&umrc->sem);
dma_unmap_single(ddev, mr->dma, size, DMA_TO_DEVICE);
kfree(mr->pas);
if (mr->status != IB_WC_SUCCESS) {
mlx5_ib_warn(dev, "reg umr failed\n");
err = -EFAULT;
goto error;
}
return mr;
error:
free_cached_mr(dev, mr);
return ERR_PTR(err);
}
static struct mlx5_ib_mr *reg_create(struct ib_pd *pd, u64 virt_addr,
u64 length, struct ib_umem *umem,
int npages, int page_shift,
int access_flags)
{
struct mlx5_ib_dev *dev = to_mdev(pd->device);
struct mlx5_create_mkey_mbox_in *in;
struct mlx5_ib_mr *mr;
int inlen;
int err;
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
inlen = sizeof(*in) + sizeof(*in->pas) * ((npages + 1) / 2) * 2;
in = mlx5_vzalloc(inlen);
if (!in) {
err = -ENOMEM;
goto err_1;
}
mlx5_ib_populate_pas(dev, umem, page_shift, in->pas, 0);
in->seg.flags = convert_access(access_flags) |
MLX5_ACCESS_MODE_MTT;
in->seg.flags_pd = cpu_to_be32(to_mpd(pd)->pdn);
in->seg.start_addr = cpu_to_be64(virt_addr);
in->seg.len = cpu_to_be64(length);
in->seg.bsfs_octo_size = 0;
in->seg.xlt_oct_size = cpu_to_be32(get_octo_len(virt_addr, length, 1 << page_shift));
in->seg.log2_page_size = page_shift;
in->seg.qpn_mkey7_0 = cpu_to_be32(0xffffff << 8);
in->xlat_oct_act_size = cpu_to_be32(get_octo_len(virt_addr, length,
1 << page_shift));
err = mlx5_core_create_mkey(&dev->mdev, &mr->mmr, in, inlen, NULL,
NULL, NULL);
if (err) {
mlx5_ib_warn(dev, "create mkey failed\n");
goto err_2;
}
mr->umem = umem;
mlx5_vfree(in);
mlx5_ib_dbg(dev, "mkey = 0x%x\n", mr->mmr.key);
return mr;
err_2:
mlx5_vfree(in);
err_1:
kfree(mr);
return ERR_PTR(err);
}
struct ib_mr *mlx5_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
u64 virt_addr, int access_flags,
struct ib_udata *udata)
{
struct mlx5_ib_dev *dev = to_mdev(pd->device);
struct mlx5_ib_mr *mr = NULL;
struct ib_umem *umem;
int page_shift;
int npages;
int ncont;
int order;
int err;
mlx5_ib_dbg(dev, "start 0x%llx, virt_addr 0x%llx, length 0x%llx\n",
start, virt_addr, length);
umem = ib_umem_get(pd->uobject->context, start, length, access_flags,
0);
if (IS_ERR(umem)) {
mlx5_ib_dbg(dev, "umem get failed\n");
return (void *)umem;
}
mlx5_ib_cont_pages(umem, start, &npages, &page_shift, &ncont, &order);
if (!npages) {
mlx5_ib_warn(dev, "avoid zero region\n");
err = -EINVAL;
goto error;
}
mlx5_ib_dbg(dev, "npages %d, ncont %d, order %d, page_shift %d\n",
npages, ncont, order, page_shift);
if (use_umr(order)) {
mr = reg_umr(pd, umem, virt_addr, length, ncont, page_shift,
order, access_flags);
if (PTR_ERR(mr) == -EAGAIN) {
mlx5_ib_dbg(dev, "cache empty for order %d", order);
mr = NULL;
}
}
if (!mr)
mr = reg_create(pd, virt_addr, length, umem, ncont, page_shift,
access_flags);
if (IS_ERR(mr)) {
err = PTR_ERR(mr);
goto error;
}
mlx5_ib_dbg(dev, "mkey 0x%x\n", mr->mmr.key);
mr->umem = umem;
mr->npages = npages;
spin_lock(&dev->mr_lock);
dev->mdev.priv.reg_pages += npages;
spin_unlock(&dev->mr_lock);
mr->ibmr.lkey = mr->mmr.key;
mr->ibmr.rkey = mr->mmr.key;
return &mr->ibmr;
error:
ib_umem_release(umem);
return ERR_PTR(err);
}
static int unreg_umr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
{
struct umr_common *umrc = &dev->umrc;
struct ib_send_wr wr, *bad;
int err;
memset(&wr, 0, sizeof(wr));
wr.wr_id = (u64)(unsigned long)mr;
prep_umr_unreg_wqe(dev, &wr, mr->mmr.key);
down(&umrc->sem);
init_completion(&mr->done);
err = ib_post_send(umrc->qp, &wr, &bad);
if (err) {
up(&umrc->sem);
mlx5_ib_dbg(dev, "err %d\n", err);
goto error;
}
wait_for_completion(&mr->done);
up(&umrc->sem);
if (mr->status != IB_WC_SUCCESS) {
mlx5_ib_warn(dev, "unreg umr failed\n");
err = -EFAULT;
goto error;
}
return 0;
error:
return err;
}
int mlx5_ib_dereg_mr(struct ib_mr *ibmr)
{
struct mlx5_ib_dev *dev = to_mdev(ibmr->device);
struct mlx5_ib_mr *mr = to_mmr(ibmr);
struct ib_umem *umem = mr->umem;
int npages = mr->npages;
int umred = mr->umred;
int err;
if (!umred) {
err = mlx5_core_destroy_mkey(&dev->mdev, &mr->mmr);
if (err) {
mlx5_ib_warn(dev, "failed to destroy mkey 0x%x (%d)\n",
mr->mmr.key, err);
return err;
}
} else {
err = unreg_umr(dev, mr);
if (err) {
mlx5_ib_warn(dev, "failed unregister\n");
return err;
}
free_cached_mr(dev, mr);
}
if (umem) {
ib_umem_release(umem);
spin_lock(&dev->mr_lock);
dev->mdev.priv.reg_pages -= npages;
spin_unlock(&dev->mr_lock);
}
if (!umred)
kfree(mr);
return 0;
}
struct ib_mr *mlx5_ib_alloc_fast_reg_mr(struct ib_pd *pd,
int max_page_list_len)
{
struct mlx5_ib_dev *dev = to_mdev(pd->device);
struct mlx5_create_mkey_mbox_in *in;
struct mlx5_ib_mr *mr;
int err;
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
in = kzalloc(sizeof(*in), GFP_KERNEL);
if (!in) {
err = -ENOMEM;
goto err_free;
}
in->seg.status = 1 << 6; /* free */
in->seg.xlt_oct_size = cpu_to_be32((max_page_list_len + 1) / 2);
in->seg.qpn_mkey7_0 = cpu_to_be32(0xffffff << 8);
in->seg.flags = MLX5_PERM_UMR_EN | MLX5_ACCESS_MODE_MTT;
in->seg.flags_pd = cpu_to_be32(to_mpd(pd)->pdn);
/*
* TBD not needed - issue 197292 */
in->seg.log2_page_size = PAGE_SHIFT;
err = mlx5_core_create_mkey(&dev->mdev, &mr->mmr, in, sizeof(*in), NULL,
NULL, NULL);
kfree(in);
if (err)
goto err_free;
mr->ibmr.lkey = mr->mmr.key;
mr->ibmr.rkey = mr->mmr.key;
mr->umem = NULL;
return &mr->ibmr;
err_free:
kfree(mr);
return ERR_PTR(err);
}
struct ib_fast_reg_page_list *mlx5_ib_alloc_fast_reg_page_list(struct ib_device *ibdev,
int page_list_len)
{
struct mlx5_ib_fast_reg_page_list *mfrpl;
int size = page_list_len * sizeof(u64);
mfrpl = kmalloc(sizeof(*mfrpl), GFP_KERNEL);
if (!mfrpl)
return ERR_PTR(-ENOMEM);
mfrpl->ibfrpl.page_list = kmalloc(size, GFP_KERNEL);
if (!mfrpl->ibfrpl.page_list)
goto err_free;
mfrpl->mapped_page_list = dma_alloc_coherent(ibdev->dma_device,
size, &mfrpl->map,
GFP_KERNEL);
if (!mfrpl->mapped_page_list)
goto err_free;
WARN_ON(mfrpl->map & 0x3f);
return &mfrpl->ibfrpl;
err_free:
kfree(mfrpl->ibfrpl.page_list);
kfree(mfrpl);
return ERR_PTR(-ENOMEM);
}
void mlx5_ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
{
struct mlx5_ib_fast_reg_page_list *mfrpl = to_mfrpl(page_list);
struct mlx5_ib_dev *dev = to_mdev(page_list->device);
int size = page_list->max_page_list_len * sizeof(u64);
dma_free_coherent(&dev->mdev.pdev->dev, size, mfrpl->mapped_page_list,
mfrpl->map);
kfree(mfrpl->ibfrpl.page_list);
kfree(mfrpl);
}