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Message-Id: <20180401143459.30770-5-idosch@mellanox.com>
Date: Sun, 1 Apr 2018 17:34:53 +0300
From: Ido Schimmel <idosch@...lanox.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, jiri@...lanox.com, petrm@...lanox.com,
dsahern@...il.com, mlxsw@...lanox.com,
Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH v2 net-next 04/10] mlxsw: spectrum: Change KVD linear parts from list to array
From: Jiri Pirko <jiri@...lanox.com>
The parts info is array. The parts copy this info array, yet they are a
list. So make the indexing according to the id and change the list of
parts into array of parts. This helps to eliminate lookups and
constructs like mlxsw_sp_kvdl_part_update() (took me some non-trivial
time to figure out what is going on there).
Alongside with that, introduce a helper macro to define the parts infos.
Signed-off-by: Jiri Pirko <jiri@...lanox.com>
Signed-off-by: Ido Schimmel <idosch@...lanox.com>
---
.../net/ethernet/mellanox/mlxsw/spectrum_kvdl.c | 235 ++++++++-------------
1 file changed, 92 insertions(+), 143 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c
index 201825c0019b..7b28f65d6407 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c
@@ -55,24 +55,47 @@
#define MLXSW_SP_KVDL_LARGE_CHUNKS_END \
(MLXSW_SP_KVDL_LARGE_CHUNKS_SIZE + MLXSW_SP_KVDL_LARGE_CHUNKS_BASE - 1)
-#define MLXSW_SP_CHUNK_MAX 32
-#define MLXSW_SP_LARGE_CHUNK_MAX 512
+#define MLXSW_SP_KVDL_SINGLE_ALLOC_SIZE 1
+#define MLXSW_SP_KVDL_CHUNKS_ALLOC_SIZE 32
+#define MLXSW_SP_KVDL_LARGE_CHUNKS_ALLOC_SIZE 512
struct mlxsw_sp_kvdl_part_info {
unsigned int part_index;
unsigned int start_index;
unsigned int end_index;
unsigned int alloc_size;
+ enum mlxsw_sp_resource_id resource_id;
+};
+
+enum mlxsw_sp_kvdl_part_id {
+ MLXSW_SP_KVDL_PART_ID_SINGLE,
+ MLXSW_SP_KVDL_PART_ID_CHUNKS,
+ MLXSW_SP_KVDL_PART_ID_LARGE_CHUNKS,
};
+#define MLXSW_SP_KVDL_PART_INFO(id) \
+[MLXSW_SP_KVDL_PART_ID_##id] = { \
+ .start_index = MLXSW_SP_KVDL_##id##_BASE, \
+ .end_index = MLXSW_SP_KVDL_##id##_END, \
+ .alloc_size = MLXSW_SP_KVDL_##id##_ALLOC_SIZE, \
+ .resource_id = MLXSW_SP_RESOURCE_KVD_LINEAR_##id, \
+}
+
+static const struct mlxsw_sp_kvdl_part_info mlxsw_sp_kvdl_parts_info[] = {
+ MLXSW_SP_KVDL_PART_INFO(SINGLE),
+ MLXSW_SP_KVDL_PART_INFO(CHUNKS),
+ MLXSW_SP_KVDL_PART_INFO(LARGE_CHUNKS),
+};
+
+#define MLXSW_SP_KVDL_PARTS_INFO_LEN ARRAY_SIZE(mlxsw_sp_kvdl_parts_info)
+
struct mlxsw_sp_kvdl_part {
- struct list_head list;
- struct mlxsw_sp_kvdl_part_info *info;
+ struct mlxsw_sp_kvdl_part_info info;
unsigned long usage[0]; /* Entries */
};
struct mlxsw_sp_kvdl {
- struct list_head parts_list;
+ struct mlxsw_sp_kvdl_part *parts[MLXSW_SP_KVDL_PARTS_INFO_LEN];
};
static struct mlxsw_sp_kvdl_part *
@@ -80,11 +103,13 @@ mlxsw_sp_kvdl_alloc_size_part(struct mlxsw_sp_kvdl *kvdl,
unsigned int alloc_size)
{
struct mlxsw_sp_kvdl_part *part, *min_part = NULL;
+ int i;
- list_for_each_entry(part, &kvdl->parts_list, list) {
- if (alloc_size <= part->info->alloc_size &&
+ for (i = 0; i < MLXSW_SP_KVDL_PARTS_INFO_LEN; i++) {
+ part = kvdl->parts[i];
+ if (alloc_size <= part->info.alloc_size &&
(!min_part ||
- part->info->alloc_size <= min_part->info->alloc_size))
+ part->info.alloc_size <= min_part->info.alloc_size))
min_part = part;
}
@@ -95,10 +120,12 @@ static struct mlxsw_sp_kvdl_part *
mlxsw_sp_kvdl_index_part(struct mlxsw_sp_kvdl *kvdl, u32 kvdl_index)
{
struct mlxsw_sp_kvdl_part *part;
+ int i;
- list_for_each_entry(part, &kvdl->parts_list, list) {
- if (kvdl_index >= part->info->start_index &&
- kvdl_index <= part->info->end_index)
+ for (i = 0; i < MLXSW_SP_KVDL_PARTS_INFO_LEN; i++) {
+ part = kvdl->parts[i];
+ if (kvdl_index >= part->info.start_index &&
+ kvdl_index <= part->info.end_index)
return part;
}
@@ -122,7 +149,7 @@ mlxsw_sp_kvdl_index_entry_index(const struct mlxsw_sp_kvdl_part_info *info,
static int mlxsw_sp_kvdl_part_alloc(struct mlxsw_sp_kvdl_part *part,
u32 *p_kvdl_index)
{
- const struct mlxsw_sp_kvdl_part_info *info = part->info;
+ const struct mlxsw_sp_kvdl_part_info *info = &part->info;
unsigned int entry_index, nr_entries;
nr_entries = (info->end_index - info->start_index + 1) /
@@ -132,8 +159,7 @@ static int mlxsw_sp_kvdl_part_alloc(struct mlxsw_sp_kvdl_part *part,
return -ENOBUFS;
__set_bit(entry_index, part->usage);
- *p_kvdl_index = mlxsw_sp_entry_index_kvdl_index(part->info,
- entry_index);
+ *p_kvdl_index = mlxsw_sp_entry_index_kvdl_index(info, entry_index);
return 0;
}
@@ -141,10 +167,10 @@ static int mlxsw_sp_kvdl_part_alloc(struct mlxsw_sp_kvdl_part *part,
static void mlxsw_sp_kvdl_part_free(struct mlxsw_sp_kvdl_part *part,
u32 kvdl_index)
{
+ const struct mlxsw_sp_kvdl_part_info *info = &part->info;
unsigned int entry_index;
- entry_index = mlxsw_sp_kvdl_index_entry_index(part->info,
- kvdl_index);
+ entry_index = mlxsw_sp_kvdl_index_entry_index(info, kvdl_index);
__clear_bit(entry_index, part->usage);
}
@@ -183,74 +209,30 @@ int mlxsw_sp_kvdl_alloc_size_query(struct mlxsw_sp *mlxsw_sp,
if (IS_ERR(part))
return PTR_ERR(part);
- *p_alloc_size = part->info->alloc_size;
+ *p_alloc_size = part->info.alloc_size;
return 0;
}
-enum mlxsw_sp_kvdl_part_id {
- MLXSW_SP_KVDL_PART_SINGLE,
- MLXSW_SP_KVDL_PART_CHUNKS,
- MLXSW_SP_KVDL_PART_LARGE_CHUNKS,
-};
-
-static const struct mlxsw_sp_kvdl_part_info kvdl_parts_info[] = {
- {
- .part_index = MLXSW_SP_KVDL_PART_SINGLE,
- .start_index = MLXSW_SP_KVDL_SINGLE_BASE,
- .end_index = MLXSW_SP_KVDL_SINGLE_END,
- .alloc_size = 1,
- },
- {
- .part_index = MLXSW_SP_KVDL_PART_CHUNKS,
- .start_index = MLXSW_SP_KVDL_CHUNKS_BASE,
- .end_index = MLXSW_SP_KVDL_CHUNKS_END,
- .alloc_size = MLXSW_SP_CHUNK_MAX,
- },
- {
- .part_index = MLXSW_SP_KVDL_PART_LARGE_CHUNKS,
- .start_index = MLXSW_SP_KVDL_LARGE_CHUNKS_BASE,
- .end_index = MLXSW_SP_KVDL_LARGE_CHUNKS_END,
- .alloc_size = MLXSW_SP_LARGE_CHUNK_MAX,
- },
-};
-
-static struct mlxsw_sp_kvdl_part *
-mlxsw_sp_kvdl_part_find(struct mlxsw_sp *mlxsw_sp, unsigned int part_index)
-{
- struct mlxsw_sp_kvdl_part *part;
-
- list_for_each_entry(part, &mlxsw_sp->kvdl->parts_list, list) {
- if (part->info->part_index == part_index)
- return part;
- }
-
- return NULL;
-}
-
-static void
-mlxsw_sp_kvdl_part_update(struct mlxsw_sp *mlxsw_sp,
- struct mlxsw_sp_kvdl_part *part, unsigned int size)
+static void mlxsw_sp_kvdl_part_update(struct mlxsw_sp_kvdl_part *part,
+ struct mlxsw_sp_kvdl_part *part_prev,
+ unsigned int size)
{
- struct mlxsw_sp_kvdl_part_info *info = part->info;
-
- if (list_is_last(&part->list, &mlxsw_sp->kvdl->parts_list)) {
- info->end_index = size - 1;
- } else {
- struct mlxsw_sp_kvdl_part *last_part;
- last_part = list_next_entry(part, list);
- info->start_index = last_part->info->end_index + 1;
- info->end_index = info->start_index + size - 1;
+ if (!part_prev) {
+ part->info.end_index = size - 1;
+ } else {
+ part->info.start_index = part_prev->info.end_index + 1;
+ part->info.end_index = part->info.start_index + size - 1;
}
}
-static int mlxsw_sp_kvdl_part_init(struct mlxsw_sp *mlxsw_sp,
- unsigned int part_index)
+static struct mlxsw_sp_kvdl_part *
+mlxsw_sp_kvdl_part_init(struct mlxsw_sp *mlxsw_sp,
+ const struct mlxsw_sp_kvdl_part_info *info,
+ struct mlxsw_sp_kvdl_part *part_prev)
{
struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
- const struct mlxsw_sp_kvdl_part_info *info;
- enum mlxsw_sp_resource_id resource_id;
struct mlxsw_sp_kvdl_part *part;
bool need_update = true;
unsigned int nr_entries;
@@ -258,23 +240,8 @@ static int mlxsw_sp_kvdl_part_init(struct mlxsw_sp *mlxsw_sp,
u64 resource_size;
int err;
- info = &kvdl_parts_info[part_index];
-
- switch (part_index) {
- case MLXSW_SP_KVDL_PART_SINGLE:
- resource_id = MLXSW_SP_RESOURCE_KVD_LINEAR_SINGLE;
- break;
- case MLXSW_SP_KVDL_PART_CHUNKS:
- resource_id = MLXSW_SP_RESOURCE_KVD_LINEAR_CHUNKS;
- break;
- case MLXSW_SP_KVDL_PART_LARGE_CHUNKS:
- resource_id = MLXSW_SP_RESOURCE_KVD_LINEAR_LARGE_CHUNKS;
- break;
- default:
- return -EINVAL;
- }
-
- err = devlink_resource_size_get(devlink, resource_id, &resource_size);
+ err = devlink_resource_size_get(devlink, info->resource_id,
+ &resource_size);
if (err) {
need_update = false;
resource_size = info->end_index - info->start_index + 1;
@@ -284,86 +251,77 @@ static int mlxsw_sp_kvdl_part_init(struct mlxsw_sp *mlxsw_sp,
usage_size = BITS_TO_LONGS(nr_entries) * sizeof(unsigned long);
part = kzalloc(sizeof(*part) + usage_size, GFP_KERNEL);
if (!part)
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
- part->info = kmemdup(info, sizeof(*part->info), GFP_KERNEL);
- if (!part->info)
- goto err_part_info_alloc;
+ memcpy(&part->info, info, sizeof(part->info));
- list_add(&part->list, &mlxsw_sp->kvdl->parts_list);
if (need_update)
- mlxsw_sp_kvdl_part_update(mlxsw_sp, part, resource_size);
- return 0;
-
-err_part_info_alloc:
- kfree(part);
- return -ENOMEM;
+ mlxsw_sp_kvdl_part_update(part, part_prev, resource_size);
+ return part;
}
-static void mlxsw_sp_kvdl_part_fini(struct mlxsw_sp *mlxsw_sp,
- unsigned int part_index)
+static void mlxsw_sp_kvdl_part_fini(struct mlxsw_sp_kvdl_part *part)
{
- struct mlxsw_sp_kvdl_part *part;
-
- part = mlxsw_sp_kvdl_part_find(mlxsw_sp, part_index);
- if (!part)
- return;
-
- list_del(&part->list);
- kfree(part->info);
kfree(part);
}
static int mlxsw_sp_kvdl_parts_init(struct mlxsw_sp *mlxsw_sp)
{
+ struct mlxsw_sp_kvdl *kvdl = mlxsw_sp->kvdl;
+ const struct mlxsw_sp_kvdl_part_info *info;
+ struct mlxsw_sp_kvdl_part *part_prev = NULL;
int err, i;
- INIT_LIST_HEAD(&mlxsw_sp->kvdl->parts_list);
-
- for (i = 0; i < ARRAY_SIZE(kvdl_parts_info); i++) {
- err = mlxsw_sp_kvdl_part_init(mlxsw_sp, i);
- if (err)
+ for (i = 0; i < MLXSW_SP_KVDL_PARTS_INFO_LEN; i++) {
+ info = &mlxsw_sp_kvdl_parts_info[i];
+ kvdl->parts[i] = mlxsw_sp_kvdl_part_init(mlxsw_sp, info,
+ part_prev);
+ if (IS_ERR(kvdl->parts[i])) {
+ err = PTR_ERR(kvdl->parts[i]);
goto err_kvdl_part_init;
+ }
+ part_prev = kvdl->parts[i];
}
-
return 0;
err_kvdl_part_init:
for (i--; i >= 0; i--)
- mlxsw_sp_kvdl_part_fini(mlxsw_sp, i);
+ mlxsw_sp_kvdl_part_fini(kvdl->parts[i]);
return err;
}
static void mlxsw_sp_kvdl_parts_fini(struct mlxsw_sp *mlxsw_sp)
{
+ struct mlxsw_sp_kvdl *kvdl = mlxsw_sp->kvdl;
int i;
- for (i = ARRAY_SIZE(kvdl_parts_info) - 1; i >= 0; i--)
- mlxsw_sp_kvdl_part_fini(mlxsw_sp, i);
+ for (i = 0; i < MLXSW_SP_KVDL_PARTS_INFO_LEN; i++)
+ mlxsw_sp_kvdl_part_fini(kvdl->parts[i]);
}
static u64 mlxsw_sp_kvdl_part_occ(struct mlxsw_sp_kvdl_part *part)
{
+ const struct mlxsw_sp_kvdl_part_info *info = &part->info;
unsigned int nr_entries;
int bit = -1;
u64 occ = 0;
- nr_entries = (part->info->end_index -
- part->info->start_index + 1) /
- part->info->alloc_size;
+ nr_entries = (info->end_index -
+ info->start_index + 1) /
+ info->alloc_size;
while ((bit = find_next_bit(part->usage, nr_entries, bit + 1))
< nr_entries)
- occ += part->info->alloc_size;
+ occ += info->alloc_size;
return occ;
}
u64 mlxsw_sp_kvdl_occ_get(const struct mlxsw_sp *mlxsw_sp)
{
- struct mlxsw_sp_kvdl_part *part;
u64 occ = 0;
+ int i;
- list_for_each_entry(part, &mlxsw_sp->kvdl->parts_list, list)
- occ += mlxsw_sp_kvdl_part_occ(part);
+ for (i = 0; i < MLXSW_SP_KVDL_PARTS_INFO_LEN; i++)
+ occ += mlxsw_sp_kvdl_part_occ(mlxsw_sp->kvdl->parts[i]);
return occ;
}
@@ -374,10 +332,7 @@ static u64 mlxsw_sp_kvdl_single_occ_get(struct devlink *devlink)
struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
struct mlxsw_sp_kvdl_part *part;
- part = mlxsw_sp_kvdl_part_find(mlxsw_sp, MLXSW_SP_KVDL_PART_SINGLE);
- if (!part)
- return -EINVAL;
-
+ part = mlxsw_sp->kvdl->parts[MLXSW_SP_KVDL_PART_ID_SINGLE];
return mlxsw_sp_kvdl_part_occ(part);
}
@@ -387,10 +342,7 @@ static u64 mlxsw_sp_kvdl_chunks_occ_get(struct devlink *devlink)
struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
struct mlxsw_sp_kvdl_part *part;
- part = mlxsw_sp_kvdl_part_find(mlxsw_sp, MLXSW_SP_KVDL_PART_CHUNKS);
- if (!part)
- return -EINVAL;
-
+ part = mlxsw_sp->kvdl->parts[MLXSW_SP_KVDL_PART_ID_CHUNKS];
return mlxsw_sp_kvdl_part_occ(part);
}
@@ -400,11 +352,7 @@ static u64 mlxsw_sp_kvdl_large_chunks_occ_get(struct devlink *devlink)
struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
struct mlxsw_sp_kvdl_part *part;
- part = mlxsw_sp_kvdl_part_find(mlxsw_sp,
- MLXSW_SP_KVDL_PART_LARGE_CHUNKS);
- if (!part)
- return -EINVAL;
-
+ part = mlxsw_sp->kvdl->parts[MLXSW_SP_KVDL_PART_ID_LARGE_CHUNKS];
return mlxsw_sp_kvdl_part_occ(part);
}
@@ -431,7 +379,8 @@ int mlxsw_sp_kvdl_resources_register(struct devlink *devlink)
MLXSW_CORE_RES_GET(mlxsw_core, KVD_SINGLE_MIN_SIZE) -
MLXSW_CORE_RES_GET(mlxsw_core, KVD_DOUBLE_MIN_SIZE);
- devlink_resource_size_params_init(&size_params, 0, kvdl_max_size, 1,
+ devlink_resource_size_params_init(&size_params, 0, kvdl_max_size,
+ MLXSW_SP_KVDL_SINGLE_ALLOC_SIZE,
DEVLINK_RESOURCE_UNIT_ENTRY);
err = devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_SINGLES,
MLXSW_SP_KVDL_SINGLE_SIZE,
@@ -443,7 +392,7 @@ int mlxsw_sp_kvdl_resources_register(struct devlink *devlink)
return err;
devlink_resource_size_params_init(&size_params, 0, kvdl_max_size,
- MLXSW_SP_CHUNK_MAX,
+ MLXSW_SP_KVDL_CHUNKS_ALLOC_SIZE,
DEVLINK_RESOURCE_UNIT_ENTRY);
err = devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_CHUNKS,
MLXSW_SP_KVDL_CHUNKS_SIZE,
@@ -455,7 +404,7 @@ int mlxsw_sp_kvdl_resources_register(struct devlink *devlink)
return err;
devlink_resource_size_params_init(&size_params, 0, kvdl_max_size,
- MLXSW_SP_LARGE_CHUNK_MAX,
+ MLXSW_SP_KVDL_LARGE_CHUNKS_ALLOC_SIZE,
DEVLINK_RESOURCE_UNIT_ENTRY);
err = devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_LARGE_CHUNKS,
MLXSW_SP_KVDL_LARGE_CHUNKS_SIZE,
--
2.14.3
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