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net/mlx5: Pages management commands via mlx5 ifc
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Remove old representation of manually created Pages management
commands layout, and use mlx5_ifc canonical structures and defines.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
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Saeed Mahameed authored and Leon Romanovsky committed Aug 14, 2016
1 parent 20bb566 commit a533ed5
Showing 1 changed file with 58 additions and 107 deletions.
165 changes: 58 additions & 107 deletions drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -44,12 +44,6 @@ enum {
MLX5_PAGES_TAKE = 2
};

enum {
MLX5_BOOT_PAGES = 1,
MLX5_INIT_PAGES = 2,
MLX5_POST_INIT_PAGES = 3
};

struct mlx5_pages_req {
struct mlx5_core_dev *dev;
u16 func_id;
Expand All @@ -67,33 +61,6 @@ struct fw_page {
unsigned free_count;
};

struct mlx5_query_pages_inbox {
struct mlx5_inbox_hdr hdr;
u8 rsvd[8];
};

struct mlx5_query_pages_outbox {
struct mlx5_outbox_hdr hdr;
__be16 rsvd;
__be16 func_id;
__be32 num_pages;
};

struct mlx5_manage_pages_inbox {
struct mlx5_inbox_hdr hdr;
__be16 rsvd;
__be16 func_id;
__be32 num_entries;
__be64 pas[0];
};

struct mlx5_manage_pages_outbox {
struct mlx5_outbox_hdr hdr;
__be32 num_entries;
u8 rsvd[4];
__be64 pas[0];
};

enum {
MAX_RECLAIM_TIME_MSECS = 5000,
MAX_RECLAIM_VFS_PAGES_TIME_MSECS = 2 * 1000 * 60,
Expand Down Expand Up @@ -167,24 +134,22 @@ static struct fw_page *find_fw_page(struct mlx5_core_dev *dev, u64 addr)
static int mlx5_cmd_query_pages(struct mlx5_core_dev *dev, u16 *func_id,
s32 *npages, int boot)
{
struct mlx5_query_pages_inbox in;
struct mlx5_query_pages_outbox out;
u32 out[MLX5_ST_SZ_DW(query_pages_out)] = {0};
u32 in[MLX5_ST_SZ_DW(query_pages_in)] = {0};
int err;

memset(&in, 0, sizeof(in));
memset(&out, 0, sizeof(out));
in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_PAGES);
in.hdr.opmod = boot ? cpu_to_be16(MLX5_BOOT_PAGES) : cpu_to_be16(MLX5_INIT_PAGES);
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);

err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
err = err ? : mlx5_cmd_status_to_err_v2(out);
if (err)
return err;

if (out.hdr.status)
return mlx5_cmd_status_to_err(&out.hdr);

*npages = be32_to_cpu(out.num_pages);
*func_id = be16_to_cpu(out.func_id);
*npages = MLX5_GET(query_pages_out, out, num_pages);
*func_id = MLX5_GET(query_pages_out, out, function_id);

return err;
}
Expand Down Expand Up @@ -280,46 +245,37 @@ static int alloc_system_page(struct mlx5_core_dev *dev, u16 func_id)

static void page_notify_fail(struct mlx5_core_dev *dev, u16 func_id)
{
struct mlx5_manage_pages_inbox *in;
struct mlx5_manage_pages_outbox out;
u32 out[MLX5_ST_SZ_DW(manage_pages_out)] = {0};
u32 in[MLX5_ST_SZ_DW(manage_pages_in)] = {0};
int err;

in = kzalloc(sizeof(*in), GFP_KERNEL);
if (!in)
return;

memset(&out, 0, sizeof(out));
in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_MANAGE_PAGES);
in->hdr.opmod = cpu_to_be16(MLX5_PAGES_CANT_GIVE);
in->func_id = cpu_to_be16(func_id);
err = mlx5_cmd_exec(dev, in, sizeof(*in), &out, sizeof(out));
if (!err)
err = mlx5_cmd_status_to_err(&out.hdr);

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);
err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
err = err ? : mlx5_cmd_status_to_err_v2(out);
if (err)
mlx5_core_warn(dev, "page notify failed\n");

kfree(in);
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)
{
struct mlx5_manage_pages_inbox *in;
struct mlx5_manage_pages_outbox out;
int inlen;
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 = sizeof(*in) + npages * sizeof(in->pas[0]);
inlen += npages * MLX5_FLD_SZ_BYTES(manage_pages_in, pas[0]);
in = mlx5_vzalloc(inlen);
if (!in) {
err = -ENOMEM;
mlx5_core_warn(dev, "vzalloc failed %d\n", inlen);
goto out_free;
}
memset(&out, 0, sizeof(out));

for (i = 0; i < npages; i++) {
retry:
Expand All @@ -332,27 +288,22 @@ static int give_pages(struct mlx5_core_dev *dev, u16 func_id, int npages,

goto retry;
}
in->pas[i] = cpu_to_be64(addr);
MLX5_SET64(manage_pages_in, in, pas[i], addr);
}

in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_MANAGE_PAGES);
in->hdr.opmod = cpu_to_be16(MLX5_PAGES_GIVE);
in->func_id = cpu_to_be16(func_id);
in->num_entries = cpu_to_be32(npages);
err = mlx5_cmd_exec(dev, in, inlen, &out, sizeof(out));
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);

err = mlx5_cmd_exec(dev, in, inlen, out, sizeof(out));
err = err ? : mlx5_cmd_status_to_err_v2(out);
if (err) {
mlx5_core_warn(dev, "func_id 0x%x, npages %d, err %d\n",
func_id, npages, err);
goto out_4k;
}

err = mlx5_cmd_status_to_err(&out.hdr);
if (err) {
mlx5_core_warn(dev, "func_id 0x%x, npages %d, status %d\n",
func_id, npages, out.hdr.status);
goto out_4k;
}

dev->priv.fw_pages += npages;
if (func_id)
dev->priv.vfs_pages += npages;
Expand All @@ -364,7 +315,7 @@ static int give_pages(struct mlx5_core_dev *dev, u16 func_id, int npages,

out_4k:
for (i--; i >= 0; i--)
free_4k(dev, be64_to_cpu(in->pas[i]));
free_4k(dev, MLX5_GET64(manage_pages_in, in, pas[i]));
out_free:
kvfree(in);
if (notify_fail)
Expand All @@ -373,75 +324,75 @@ static int give_pages(struct mlx5_core_dev *dev, u16 func_id, int npages,
}

static int reclaim_pages_cmd(struct mlx5_core_dev *dev,
struct mlx5_manage_pages_inbox *in, int in_size,
struct mlx5_manage_pages_outbox *out, int out_size)
u32 *in, int in_size, u32 *out, int out_size)
{
struct fw_page *fwp;
struct rb_node *p;
u32 npages;
u32 i = 0;

if (dev->state != MLX5_DEVICE_STATE_INTERNAL_ERROR)
return mlx5_cmd_exec_check_status(dev, (u32 *)in, in_size,
(u32 *)out, out_size);
if (dev->state != MLX5_DEVICE_STATE_INTERNAL_ERROR) {
int err = mlx5_cmd_exec(dev, in, in_size, out, out_size);

npages = be32_to_cpu(in->num_entries);
return err ? : mlx5_cmd_status_to_err_v2(out);
}

/* No hard feelings, we want our pages back! */
npages = MLX5_GET(manage_pages_in, in, input_num_entries);

p = rb_first(&dev->priv.page_root);
while (p && i < npages) {
fwp = rb_entry(p, struct fw_page, rb_node);
out->pas[i] = cpu_to_be64(fwp->addr);
MLX5_SET64(manage_pages_out, out, pas[i], fwp->addr);
p = rb_next(p);
i++;
}

out->num_entries = cpu_to_be32(i);
MLX5_SET(manage_pages_out, out, output_num_entries, i);
return 0;
}

static int reclaim_pages(struct mlx5_core_dev *dev, u32 func_id, int npages,
int *nclaimed)
{
struct mlx5_manage_pages_inbox in;
struct mlx5_manage_pages_outbox *out;
int outlen = MLX5_ST_SZ_BYTES(manage_pages_out);
u32 in[MLX5_ST_SZ_DW(manage_pages_in)] = {0};
int num_claimed;
int outlen;
u64 addr;
u32 *out;
int err;
int i;

if (nclaimed)
*nclaimed = 0;

memset(&in, 0, sizeof(in));
outlen = sizeof(*out) + npages * sizeof(out->pas[0]);
outlen += npages * MLX5_FLD_SZ_BYTES(manage_pages_out, pas[0]);
out = mlx5_vzalloc(outlen);
if (!out)
return -ENOMEM;

in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_MANAGE_PAGES);
in.hdr.opmod = cpu_to_be16(MLX5_PAGES_TAKE);
in.func_id = cpu_to_be16(func_id);
in.num_entries = cpu_to_be32(npages);
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_core_dbg(dev, "npages %d, outlen %d\n", npages, outlen);
err = reclaim_pages_cmd(dev, &in, sizeof(in), out, 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 = be32_to_cpu(out->num_entries);
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++) {
addr = be64_to_cpu(out->pas[i]);
free_4k(dev, addr);
}
for (i = 0; i < num_claimed; i++)
free_4k(dev, MLX5_GET64(manage_pages_out, out, pas[i]));


if (nclaimed)
*nclaimed = num_claimed;
Expand Down Expand Up @@ -518,8 +469,8 @@ static int optimal_reclaimed_pages(void)
int ret;

ret = (sizeof(lay->out) + MLX5_BLKS_FOR_RECLAIM_PAGES * sizeof(block->data) -
sizeof(struct mlx5_manage_pages_outbox)) /
FIELD_SIZEOF(struct mlx5_manage_pages_outbox, pas[0]);
MLX5_ST_SZ_BYTES(manage_pages_out)) /
MLX5_FLD_SZ_BYTES(manage_pages_out, pas[0]);

return ret;
}
Expand Down

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