/*
|
* Copyright (c) 2013-2015, 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/highmem.h>
|
#include <linux/kernel.h>
|
#include <linux/module.h>
|
#include <linux/delay.h>
|
#include <linux/mlx5/driver.h>
|
#include <linux/xarray.h>
|
#include "mlx5_core.h"
|
#include "lib/eq.h"
|
|
enum {
|
MLX5_PAGES_CANT_GIVE = 0,
|
MLX5_PAGES_GIVE = 1,
|
MLX5_PAGES_TAKE = 2
|
};
|
|
struct mlx5_pages_req {
|
struct mlx5_core_dev *dev;
|
u16 func_id;
|
u8 ec_function;
|
s32 npages;
|
struct work_struct work;
|
u8 release_all;
|
};
|
|
struct fw_page {
|
struct rb_node rb_node;
|
u64 addr;
|
struct page *page;
|
u32 function;
|
unsigned long bitmask;
|
struct list_head list;
|
unsigned free_count;
|
};
|
|
enum {
|
MAX_RECLAIM_TIME_MSECS = 5000,
|
MAX_RECLAIM_VFS_PAGES_TIME_MSECS = 2 * 1000 * 60,
|
};
|
|
enum {
|
MLX5_MAX_RECLAIM_TIME_MILI = 5000,
|
MLX5_NUM_4K_IN_PAGE = PAGE_SIZE / MLX5_ADAPTER_PAGE_SIZE,
|
};
|
|
static u32 get_function(u16 func_id, bool ec_function)
|
{
|
return (u32)func_id | (ec_function << 16);
|
}
|
|
static struct rb_root *page_root_per_function(struct mlx5_core_dev *dev, u32 function)
|
{
|
struct rb_root *root;
|
int err;
|
|
root = xa_load(&dev->priv.page_root_xa, function);
|
if (root)
|
return root;
|
|
root = kzalloc(sizeof(*root), GFP_KERNEL);
|
if (!root)
|
return ERR_PTR(-ENOMEM);
|
|
err = xa_insert(&dev->priv.page_root_xa, function, root, GFP_KERNEL);
|
if (err) {
|
kfree(root);
|
return ERR_PTR(err);
|
}
|
|
*root = RB_ROOT;
|
|
return root;
|
}
|
|
static int insert_page(struct mlx5_core_dev *dev, u64 addr, struct page *page, u32 function)
|
{
|
struct rb_node *parent = NULL;
|
struct rb_root *root;
|
struct rb_node **new;
|
struct fw_page *nfp;
|
struct fw_page *tfp;
|
int i;
|
|
root = page_root_per_function(dev, function);
|
if (IS_ERR(root))
|
return PTR_ERR(root);
|
|
new = &root->rb_node;
|
|
while (*new) {
|
parent = *new;
|
tfp = rb_entry(parent, struct fw_page, rb_node);
|
if (tfp->addr < addr)
|
new = &parent->rb_left;
|
else if (tfp->addr > addr)
|
new = &parent->rb_right;
|
else
|
return -EEXIST;
|
}
|
|
nfp = kzalloc(sizeof(*nfp), GFP_KERNEL);
|
if (!nfp)
|
return -ENOMEM;
|
|
nfp->addr = addr;
|
nfp->page = page;
|
nfp->function = function;
|
nfp->free_count = MLX5_NUM_4K_IN_PAGE;
|
for (i = 0; i < MLX5_NUM_4K_IN_PAGE; i++)
|
set_bit(i, &nfp->bitmask);
|
|
rb_link_node(&nfp->rb_node, parent, new);
|
rb_insert_color(&nfp->rb_node, root);
|
list_add(&nfp->list, &dev->priv.free_list);
|
|
return 0;
|
}
|
|
static struct fw_page *find_fw_page(struct mlx5_core_dev *dev, u64 addr,
|
u32 function)
|
{
|
struct fw_page *result = NULL;
|
struct rb_root *root;
|
struct rb_node *tmp;
|
struct fw_page *tfp;
|
|
root = xa_load(&dev->priv.page_root_xa, function);
|
if (WARN_ON_ONCE(!root))
|
return NULL;
|
|
tmp = root->rb_node;
|
|
while (tmp) {
|
tfp = rb_entry(tmp, struct fw_page, rb_node);
|
if (tfp->addr < addr) {
|
tmp = tmp->rb_left;
|
} else if (tfp->addr > addr) {
|
tmp = tmp->rb_right;
|
} else {
|
result = tfp;
|
break;
|
}
|
}
|
|
return result;
|
}
|
|
static int mlx5_cmd_query_pages(struct mlx5_core_dev *dev, u16 *func_id,
|
s32 *npages, int boot)
|
{
|
u32 out[MLX5_ST_SZ_DW(query_pages_out)] = {};
|
u32 in[MLX5_ST_SZ_DW(query_pages_in)] = {};
|
int err;
|
|
MLX5_SET(query_pages_in, in, opcode, MLX5_CMD_OP_QUERY_PAGES);
|
MLX5_SET(query_pages_in, in, op_mod, boot ?
|
MLX5_QUERY_PAGES_IN_OP_MOD_BOOT_PAGES :
|
MLX5_QUERY_PAGES_IN_OP_MOD_INIT_PAGES);
|
MLX5_SET(query_pages_in, in, embedded_cpu_function, mlx5_core_is_ecpf(dev));
|
|
err = mlx5_cmd_exec_inout(dev, query_pages, in, out);
|
if (err)
|
return err;
|
|
*npages = MLX5_GET(query_pages_out, out, num_pages);
|
*func_id = MLX5_GET(query_pages_out, out, function_id);
|
|
return err;
|
}
|
|
static int alloc_4k(struct mlx5_core_dev *dev, u64 *addr, u32 function)
|
{
|
struct fw_page *fp = NULL;
|
struct fw_page *iter;
|
unsigned n;
|
|
list_for_each_entry(iter, &dev->priv.free_list, list) {
|
if (iter->function != function)
|
continue;
|
fp = iter;
|
}
|
|
if (list_empty(&dev->priv.free_list) || !fp)
|
return -ENOMEM;
|
|
n = find_first_bit(&fp->bitmask, 8 * sizeof(fp->bitmask));
|
if (n >= MLX5_NUM_4K_IN_PAGE) {
|
mlx5_core_warn(dev, "alloc 4k bug: fw page = 0x%llx, n = %u, bitmask: %lu, max num of 4K pages: %d\n",
|
fp->addr, n, fp->bitmask, MLX5_NUM_4K_IN_PAGE);
|
return -ENOENT;
|
}
|
clear_bit(n, &fp->bitmask);
|
fp->free_count--;
|
if (!fp->free_count)
|
list_del(&fp->list);
|
|
*addr = fp->addr + n * MLX5_ADAPTER_PAGE_SIZE;
|
|
return 0;
|
}
|
|
#define MLX5_U64_4K_PAGE_MASK ((~(u64)0U) << PAGE_SHIFT)
|
|
static void free_fwp(struct mlx5_core_dev *dev, struct fw_page *fwp,
|
bool in_free_list)
|
{
|
struct rb_root *root;
|
|
root = xa_load(&dev->priv.page_root_xa, fwp->function);
|
if (WARN_ON_ONCE(!root))
|
return;
|
|
rb_erase(&fwp->rb_node, root);
|
if (in_free_list)
|
list_del(&fwp->list);
|
dma_unmap_page(mlx5_core_dma_dev(dev), fwp->addr & MLX5_U64_4K_PAGE_MASK,
|
PAGE_SIZE, DMA_BIDIRECTIONAL);
|
__free_page(fwp->page);
|
kfree(fwp);
|
}
|
|
static void free_4k(struct mlx5_core_dev *dev, u64 addr, u32 function)
|
{
|
struct fw_page *fwp;
|
int n;
|
|
fwp = find_fw_page(dev, addr & MLX5_U64_4K_PAGE_MASK, function);
|
if (!fwp) {
|
mlx5_core_warn_rl(dev, "page not found\n");
|
return;
|
}
|
n = (addr & ~MLX5_U64_4K_PAGE_MASK) >> MLX5_ADAPTER_PAGE_SHIFT;
|
fwp->free_count++;
|
set_bit(n, &fwp->bitmask);
|
if (fwp->free_count == MLX5_NUM_4K_IN_PAGE)
|
free_fwp(dev, fwp, fwp->free_count != 1);
|
else if (fwp->free_count == 1)
|
list_add(&fwp->list, &dev->priv.free_list);
|
}
|
|
static int alloc_system_page(struct mlx5_core_dev *dev, u32 function)
|
{
|
struct device *device = mlx5_core_dma_dev(dev);
|
int nid = dev_to_node(device);
|
struct page *page;
|
u64 zero_addr = 1;
|
u64 addr;
|
int err;
|
|
page = alloc_pages_node(nid, GFP_HIGHUSER, 0);
|
if (!page) {
|
mlx5_core_warn(dev, "failed to allocate page\n");
|
return -ENOMEM;
|
}
|
map:
|
addr = dma_map_page(device, page, 0, PAGE_SIZE, DMA_BIDIRECTIONAL);
|
if (dma_mapping_error(device, addr)) {
|
mlx5_core_warn(dev, "failed dma mapping page\n");
|
err = -ENOMEM;
|
goto err_mapping;
|
}
|
|
/* Firmware doesn't support page with physical address 0 */
|
if (addr == 0) {
|
zero_addr = addr;
|
goto map;
|
}
|
|
err = insert_page(dev, addr, page, function);
|
if (err) {
|
mlx5_core_err(dev, "failed to track allocated page\n");
|
dma_unmap_page(device, addr, PAGE_SIZE, DMA_BIDIRECTIONAL);
|
}
|
|
err_mapping:
|
if (err)
|
__free_page(page);
|
|
if (zero_addr == 0)
|
dma_unmap_page(device, zero_addr, PAGE_SIZE,
|
DMA_BIDIRECTIONAL);
|
|
return err;
|
}
|
|
static void page_notify_fail(struct mlx5_core_dev *dev, u16 func_id,
|
bool ec_function)
|
{
|
u32 in[MLX5_ST_SZ_DW(manage_pages_in)] = {};
|
int err;
|
|
MLX5_SET(manage_pages_in, in, opcode, MLX5_CMD_OP_MANAGE_PAGES);
|
MLX5_SET(manage_pages_in, in, op_mod, MLX5_PAGES_CANT_GIVE);
|
MLX5_SET(manage_pages_in, in, function_id, func_id);
|
MLX5_SET(manage_pages_in, in, embedded_cpu_function, ec_function);
|
|
err = mlx5_cmd_exec_in(dev, manage_pages, in);
|
if (err)
|
mlx5_core_warn(dev, "page notify failed func_id(%d) err(%d)\n",
|
func_id, err);
|
}
|
|
static int give_pages(struct mlx5_core_dev *dev, u16 func_id, int npages,
|
int notify_fail, bool ec_function)
|
{
|
u32 function = get_function(func_id, ec_function);
|
u32 out[MLX5_ST_SZ_DW(manage_pages_out)] = {0};
|
int inlen = MLX5_ST_SZ_BYTES(manage_pages_in);
|
u64 addr;
|
int err;
|
u32 *in;
|
int i;
|
|
inlen += npages * MLX5_FLD_SZ_BYTES(manage_pages_in, pas[0]);
|
in = kvzalloc(inlen, GFP_KERNEL);
|
if (!in) {
|
err = -ENOMEM;
|
mlx5_core_warn(dev, "vzalloc failed %d\n", inlen);
|
goto out_free;
|
}
|
|
for (i = 0; i < npages; i++) {
|
retry:
|
err = alloc_4k(dev, &addr, function);
|
if (err) {
|
if (err == -ENOMEM)
|
err = alloc_system_page(dev, function);
|
if (err)
|
goto out_4k;
|
|
goto retry;
|
}
|
MLX5_ARRAY_SET64(manage_pages_in, in, pas, i, addr);
|
}
|
|
MLX5_SET(manage_pages_in, in, opcode, MLX5_CMD_OP_MANAGE_PAGES);
|
MLX5_SET(manage_pages_in, in, op_mod, MLX5_PAGES_GIVE);
|
MLX5_SET(manage_pages_in, in, function_id, func_id);
|
MLX5_SET(manage_pages_in, in, input_num_entries, npages);
|
MLX5_SET(manage_pages_in, in, embedded_cpu_function, ec_function);
|
|
err = mlx5_cmd_exec(dev, in, inlen, out, sizeof(out));
|
if (err) {
|
mlx5_core_warn(dev, "func_id 0x%x, npages %d, err %d\n",
|
func_id, npages, err);
|
goto out_4k;
|
}
|
|
dev->priv.fw_pages += npages;
|
if (func_id)
|
dev->priv.vfs_pages += npages;
|
else if (mlx5_core_is_ecpf(dev) && !ec_function)
|
dev->priv.peer_pf_pages += npages;
|
|
mlx5_core_dbg(dev, "npages %d, ec_function %d, func_id 0x%x, err %d\n",
|
npages, ec_function, func_id, err);
|
|
kvfree(in);
|
return 0;
|
|
out_4k:
|
for (i--; i >= 0; i--)
|
free_4k(dev, MLX5_GET64(manage_pages_in, in, pas[i]), function);
|
out_free:
|
kvfree(in);
|
if (notify_fail)
|
page_notify_fail(dev, func_id, ec_function);
|
return err;
|
}
|
|
static void release_all_pages(struct mlx5_core_dev *dev, u16 func_id,
|
bool ec_function)
|
{
|
u32 function = get_function(func_id, ec_function);
|
struct rb_root *root;
|
struct rb_node *p;
|
int npages = 0;
|
|
root = xa_load(&dev->priv.page_root_xa, function);
|
if (WARN_ON_ONCE(!root))
|
return;
|
|
p = rb_first(root);
|
while (p) {
|
struct fw_page *fwp = rb_entry(p, struct fw_page, rb_node);
|
|
p = rb_next(p);
|
npages += (MLX5_NUM_4K_IN_PAGE - fwp->free_count);
|
free_fwp(dev, fwp, fwp->free_count);
|
}
|
|
dev->priv.fw_pages -= npages;
|
if (func_id)
|
dev->priv.vfs_pages -= npages;
|
else if (mlx5_core_is_ecpf(dev) && !ec_function)
|
dev->priv.peer_pf_pages -= npages;
|
|
mlx5_core_dbg(dev, "npages %d, ec_function %d, func_id 0x%x\n",
|
npages, ec_function, func_id);
|
}
|
|
static u32 fwp_fill_manage_pages_out(struct fw_page *fwp, u32 *out, u32 index,
|
u32 npages)
|
{
|
u32 pages_set = 0;
|
unsigned int n;
|
|
for_each_clear_bit(n, &fwp->bitmask, MLX5_NUM_4K_IN_PAGE) {
|
MLX5_ARRAY_SET64(manage_pages_out, out, pas, index + pages_set,
|
fwp->addr + (n * MLX5_ADAPTER_PAGE_SIZE));
|
pages_set++;
|
|
if (!--npages)
|
break;
|
}
|
|
return pages_set;
|
}
|
|
static int reclaim_pages_cmd(struct mlx5_core_dev *dev,
|
u32 *in, int in_size, u32 *out, int out_size)
|
{
|
struct rb_root *root;
|
struct fw_page *fwp;
|
struct rb_node *p;
|
bool ec_function;
|
u32 func_id;
|
u32 npages;
|
u32 i = 0;
|
|
if (!mlx5_cmd_is_down(dev))
|
return mlx5_cmd_exec(dev, in, in_size, out, out_size);
|
|
/* No hard feelings, we want our pages back! */
|
npages = MLX5_GET(manage_pages_in, in, input_num_entries);
|
func_id = MLX5_GET(manage_pages_in, in, function_id);
|
ec_function = MLX5_GET(manage_pages_in, in, embedded_cpu_function);
|
|
root = xa_load(&dev->priv.page_root_xa, get_function(func_id, ec_function));
|
if (WARN_ON_ONCE(!root))
|
return -EEXIST;
|
|
p = rb_first(root);
|
while (p && i < npages) {
|
fwp = rb_entry(p, struct fw_page, rb_node);
|
p = rb_next(p);
|
|
i += fwp_fill_manage_pages_out(fwp, out, i, npages - i);
|
}
|
|
MLX5_SET(manage_pages_out, out, output_num_entries, i);
|
return 0;
|
}
|
|
static int reclaim_pages(struct mlx5_core_dev *dev, u16 func_id, int npages,
|
int *nclaimed, bool ec_function)
|
{
|
u32 function = get_function(func_id, ec_function);
|
int outlen = MLX5_ST_SZ_BYTES(manage_pages_out);
|
u32 in[MLX5_ST_SZ_DW(manage_pages_in)] = {};
|
int num_claimed;
|
u32 *out;
|
int err;
|
int i;
|
|
if (nclaimed)
|
*nclaimed = 0;
|
|
outlen += npages * MLX5_FLD_SZ_BYTES(manage_pages_out, pas[0]);
|
out = kvzalloc(outlen, GFP_KERNEL);
|
if (!out)
|
return -ENOMEM;
|
|
MLX5_SET(manage_pages_in, in, opcode, MLX5_CMD_OP_MANAGE_PAGES);
|
MLX5_SET(manage_pages_in, in, op_mod, MLX5_PAGES_TAKE);
|
MLX5_SET(manage_pages_in, in, function_id, func_id);
|
MLX5_SET(manage_pages_in, in, input_num_entries, npages);
|
MLX5_SET(manage_pages_in, in, embedded_cpu_function, ec_function);
|
|
mlx5_core_dbg(dev, "func 0x%x, npages %d, outlen %d\n",
|
func_id, npages, outlen);
|
err = reclaim_pages_cmd(dev, in, sizeof(in), out, outlen);
|
if (err) {
|
mlx5_core_err(dev, "failed reclaiming pages: err %d\n", err);
|
goto out_free;
|
}
|
|
num_claimed = MLX5_GET(manage_pages_out, out, output_num_entries);
|
if (num_claimed > npages) {
|
mlx5_core_warn(dev, "fw returned %d, driver asked %d => corruption\n",
|
num_claimed, npages);
|
err = -EINVAL;
|
goto out_free;
|
}
|
|
for (i = 0; i < num_claimed; i++)
|
free_4k(dev, MLX5_GET64(manage_pages_out, out, pas[i]), function);
|
|
if (nclaimed)
|
*nclaimed = num_claimed;
|
|
dev->priv.fw_pages -= num_claimed;
|
if (func_id)
|
dev->priv.vfs_pages -= num_claimed;
|
else if (mlx5_core_is_ecpf(dev) && !ec_function)
|
dev->priv.peer_pf_pages -= num_claimed;
|
|
out_free:
|
kvfree(out);
|
return err;
|
}
|
|
static void pages_work_handler(struct work_struct *work)
|
{
|
struct mlx5_pages_req *req = container_of(work, struct mlx5_pages_req, work);
|
struct mlx5_core_dev *dev = req->dev;
|
int err = 0;
|
|
if (req->release_all)
|
release_all_pages(dev, req->func_id, req->ec_function);
|
else if (req->npages < 0)
|
err = reclaim_pages(dev, req->func_id, -1 * req->npages, NULL,
|
req->ec_function);
|
else if (req->npages > 0)
|
err = give_pages(dev, req->func_id, req->npages, 1, req->ec_function);
|
|
if (err)
|
mlx5_core_warn(dev, "%s fail %d\n",
|
req->npages < 0 ? "reclaim" : "give", err);
|
|
kfree(req);
|
}
|
|
enum {
|
EC_FUNCTION_MASK = 0x8000,
|
RELEASE_ALL_PAGES_MASK = 0x4000,
|
};
|
|
static int req_pages_handler(struct notifier_block *nb,
|
unsigned long type, void *data)
|
{
|
struct mlx5_pages_req *req;
|
struct mlx5_core_dev *dev;
|
struct mlx5_priv *priv;
|
struct mlx5_eqe *eqe;
|
bool ec_function;
|
bool release_all;
|
u16 func_id;
|
s32 npages;
|
|
priv = mlx5_nb_cof(nb, struct mlx5_priv, pg_nb);
|
dev = container_of(priv, struct mlx5_core_dev, priv);
|
eqe = data;
|
|
func_id = be16_to_cpu(eqe->data.req_pages.func_id);
|
npages = be32_to_cpu(eqe->data.req_pages.num_pages);
|
ec_function = be16_to_cpu(eqe->data.req_pages.ec_function) & EC_FUNCTION_MASK;
|
release_all = be16_to_cpu(eqe->data.req_pages.ec_function) &
|
RELEASE_ALL_PAGES_MASK;
|
mlx5_core_dbg(dev, "page request for func 0x%x, npages %d, release_all %d\n",
|
func_id, npages, release_all);
|
req = kzalloc(sizeof(*req), GFP_ATOMIC);
|
if (!req) {
|
mlx5_core_warn(dev, "failed to allocate pages request\n");
|
return NOTIFY_DONE;
|
}
|
|
req->dev = dev;
|
req->func_id = func_id;
|
req->npages = npages;
|
req->ec_function = ec_function;
|
req->release_all = release_all;
|
INIT_WORK(&req->work, pages_work_handler);
|
queue_work(dev->priv.pg_wq, &req->work);
|
return NOTIFY_OK;
|
}
|
|
int mlx5_satisfy_startup_pages(struct mlx5_core_dev *dev, int boot)
|
{
|
u16 func_id;
|
s32 npages;
|
int err;
|
|
err = mlx5_cmd_query_pages(dev, &func_id, &npages, boot);
|
if (err)
|
return err;
|
|
mlx5_core_dbg(dev, "requested %d %s pages for func_id 0x%x\n",
|
npages, boot ? "boot" : "init", func_id);
|
|
return give_pages(dev, func_id, npages, 0, mlx5_core_is_ecpf(dev));
|
}
|
|
enum {
|
MLX5_BLKS_FOR_RECLAIM_PAGES = 12
|
};
|
|
static int optimal_reclaimed_pages(void)
|
{
|
struct mlx5_cmd_prot_block *block;
|
struct mlx5_cmd_layout *lay;
|
int ret;
|
|
ret = (sizeof(lay->out) + MLX5_BLKS_FOR_RECLAIM_PAGES * sizeof(block->data) -
|
MLX5_ST_SZ_BYTES(manage_pages_out)) /
|
MLX5_FLD_SZ_BYTES(manage_pages_out, pas[0]);
|
|
return ret;
|
}
|
|
static int mlx5_reclaim_root_pages(struct mlx5_core_dev *dev,
|
struct rb_root *root, u16 func_id)
|
{
|
unsigned long end = jiffies + msecs_to_jiffies(MAX_RECLAIM_TIME_MSECS);
|
|
while (!RB_EMPTY_ROOT(root)) {
|
int nclaimed;
|
int err;
|
|
err = reclaim_pages(dev, func_id, optimal_reclaimed_pages(),
|
&nclaimed, mlx5_core_is_ecpf(dev));
|
if (err) {
|
mlx5_core_warn(dev, "failed reclaiming pages (%d) for func id 0x%x\n",
|
err, func_id);
|
return err;
|
}
|
|
if (nclaimed)
|
end = jiffies + msecs_to_jiffies(MAX_RECLAIM_TIME_MSECS);
|
|
if (time_after(jiffies, end)) {
|
mlx5_core_warn(dev, "FW did not return all pages. giving up...\n");
|
break;
|
}
|
}
|
|
return 0;
|
}
|
|
int mlx5_reclaim_startup_pages(struct mlx5_core_dev *dev)
|
{
|
struct rb_root *root;
|
unsigned long id;
|
void *entry;
|
|
xa_for_each(&dev->priv.page_root_xa, id, entry) {
|
root = entry;
|
mlx5_reclaim_root_pages(dev, root, id);
|
xa_erase(&dev->priv.page_root_xa, id);
|
kfree(root);
|
}
|
|
WARN_ON(!xa_empty(&dev->priv.page_root_xa));
|
|
WARN(dev->priv.fw_pages,
|
"FW pages counter is %d after reclaiming all pages\n",
|
dev->priv.fw_pages);
|
WARN(dev->priv.vfs_pages,
|
"VFs FW pages counter is %d after reclaiming all pages\n",
|
dev->priv.vfs_pages);
|
WARN(dev->priv.peer_pf_pages,
|
"Peer PF FW pages counter is %d after reclaiming all pages\n",
|
dev->priv.peer_pf_pages);
|
|
return 0;
|
}
|
|
int mlx5_pagealloc_init(struct mlx5_core_dev *dev)
|
{
|
INIT_LIST_HEAD(&dev->priv.free_list);
|
dev->priv.pg_wq = create_singlethread_workqueue("mlx5_page_allocator");
|
if (!dev->priv.pg_wq)
|
return -ENOMEM;
|
|
xa_init(&dev->priv.page_root_xa);
|
|
return 0;
|
}
|
|
void mlx5_pagealloc_cleanup(struct mlx5_core_dev *dev)
|
{
|
xa_destroy(&dev->priv.page_root_xa);
|
destroy_workqueue(dev->priv.pg_wq);
|
}
|
|
void mlx5_pagealloc_start(struct mlx5_core_dev *dev)
|
{
|
MLX5_NB_INIT(&dev->priv.pg_nb, req_pages_handler, PAGE_REQUEST);
|
mlx5_eq_notifier_register(dev, &dev->priv.pg_nb);
|
}
|
|
void mlx5_pagealloc_stop(struct mlx5_core_dev *dev)
|
{
|
mlx5_eq_notifier_unregister(dev, &dev->priv.pg_nb);
|
flush_workqueue(dev->priv.pg_wq);
|
}
|
|
int mlx5_wait_for_pages(struct mlx5_core_dev *dev, int *pages)
|
{
|
unsigned long end = jiffies + msecs_to_jiffies(MAX_RECLAIM_VFS_PAGES_TIME_MSECS);
|
int prev_pages = *pages;
|
|
/* In case of internal error we will free the pages manually later */
|
if (dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR) {
|
mlx5_core_warn(dev, "Skipping wait for vf pages stage");
|
return 0;
|
}
|
|
mlx5_core_dbg(dev, "Waiting for %d pages\n", prev_pages);
|
while (*pages) {
|
if (time_after(jiffies, end)) {
|
mlx5_core_warn(dev, "aborting while there are %d pending pages\n", *pages);
|
return -ETIMEDOUT;
|
}
|
if (*pages < prev_pages) {
|
end = jiffies + msecs_to_jiffies(MAX_RECLAIM_VFS_PAGES_TIME_MSECS);
|
prev_pages = *pages;
|
}
|
msleep(50);
|
}
|
|
mlx5_core_dbg(dev, "All pages received\n");
|
return 0;
|
}
|
