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mlxsw: spectrum: Change KVD linear parts from list to array 

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@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2018-04-01 17:34:53 +03:00 committed by David S. Miller
parent f9b9120119
commit 4f8768befd
1 changed files with 94 additions and 145 deletions
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239
drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c
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@ -55,24 +55,47 @@
#define MLXSW_SP_KVDL_LARGE_CHUNKS_END \ #define MLXSW_SP_KVDL_LARGE_CHUNKS_END \
(MLXSW_SP_KVDL_LARGE_CHUNKS_SIZE + MLXSW_SP_KVDL_LARGE_CHUNKS_BASE - 1) (MLXSW_SP_KVDL_LARGE_CHUNKS_SIZE + MLXSW_SP_KVDL_LARGE_CHUNKS_BASE - 1)
#define MLXSW_SP_CHUNK_MAX 32 #define MLXSW_SP_KVDL_SINGLE_ALLOC_SIZE 1
#define MLXSW_SP_LARGE_CHUNK_MAX 512 #define MLXSW_SP_KVDL_CHUNKS_ALLOC_SIZE 32
#define MLXSW_SP_KVDL_LARGE_CHUNKS_ALLOC_SIZE 512
struct mlxsw_sp_kvdl_part_info { struct mlxsw_sp_kvdl_part_info {
unsigned int part_index; unsigned int part_index;
unsigned int start_index; unsigned int start_index;
unsigned int end_index; unsigned int end_index;
unsigned int alloc_size; 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 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 */ unsigned long usage[0]; /* Entries */
}; };
struct mlxsw_sp_kvdl { 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 * 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) unsigned int alloc_size)
{ {
struct mlxsw_sp_kvdl_part *part, *min_part = NULL; struct mlxsw_sp_kvdl_part *part, *min_part = NULL;
int i;
list_for_each_entry(part, &kvdl->parts_list, list) { for (i = 0; i < MLXSW_SP_KVDL_PARTS_INFO_LEN; i++) {
if (alloc_size <= part->info->alloc_size && part = kvdl->parts[i];
if (alloc_size <= part->info.alloc_size &&
(!min_part || (!min_part ||
part->info->alloc_size <= min_part->info->alloc_size)) part->info.alloc_size <= min_part->info.alloc_size))
min_part = part; 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) mlxsw_sp_kvdl_index_part(struct mlxsw_sp_kvdl *kvdl, u32 kvdl_index)
{ {
struct mlxsw_sp_kvdl_part *part; struct mlxsw_sp_kvdl_part *part;
int i;
list_for_each_entry(part, &kvdl->parts_list, list) { for (i = 0; i < MLXSW_SP_KVDL_PARTS_INFO_LEN; i++) {
if (kvdl_index >= part->info->start_index && part = kvdl->parts[i];
kvdl_index <= part->info->end_index) if (kvdl_index >= part->info.start_index &&
kvdl_index <= part->info.end_index)
return part; 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, static int mlxsw_sp_kvdl_part_alloc(struct mlxsw_sp_kvdl_part *part,
u32 *p_kvdl_index) 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; unsigned int entry_index, nr_entries;
nr_entries = (info->end_index - info->start_index + 1) / 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; return -ENOBUFS;
__set_bit(entry_index, part->usage); __set_bit(entry_index, part->usage);
*p_kvdl_index = mlxsw_sp_entry_index_kvdl_index(part->info, *p_kvdl_index = mlxsw_sp_entry_index_kvdl_index(info, entry_index);
entry_index);
return 0; 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, static void mlxsw_sp_kvdl_part_free(struct mlxsw_sp_kvdl_part *part,
u32 kvdl_index) u32 kvdl_index)
{ {
const struct mlxsw_sp_kvdl_part_info *info = &part->info;
unsigned int entry_index; unsigned int entry_index;
entry_index = mlxsw_sp_kvdl_index_entry_index(part->info, entry_index = mlxsw_sp_kvdl_index_entry_index(info, kvdl_index);
kvdl_index);
__clear_bit(entry_index, part->usage); __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)) if (IS_ERR(part))
return PTR_ERR(part); return PTR_ERR(part);
*p_alloc_size = part->info->alloc_size; *p_alloc_size = part->info.alloc_size;
return 0; return 0;
} }
enum mlxsw_sp_kvdl_part_id { static void mlxsw_sp_kvdl_part_update(struct mlxsw_sp_kvdl_part *part,
MLXSW_SP_KVDL_PART_SINGLE, struct mlxsw_sp_kvdl_part *part_prev,
MLXSW_SP_KVDL_PART_CHUNKS, unsigned int size)
MLXSW_SP_KVDL_PART_LARGE_CHUNKS, {
};
static const struct mlxsw_sp_kvdl_part_info kvdl_parts_info[] = { if (!part_prev) {
{ part->info.end_index = size - 1;
.part_index = MLXSW_SP_KVDL_PART_SINGLE, } else {
.start_index = MLXSW_SP_KVDL_SINGLE_BASE, part->info.start_index = part_prev->info.end_index + 1;
.end_index = MLXSW_SP_KVDL_SINGLE_END, part->info.end_index = part->info.start_index + size - 1;
.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 * static struct mlxsw_sp_kvdl_part *
mlxsw_sp_kvdl_part_find(struct mlxsw_sp *mlxsw_sp, unsigned int part_index) mlxsw_sp_kvdl_part_init(struct mlxsw_sp *mlxsw_sp,
{ const struct mlxsw_sp_kvdl_part_info *info,
struct mlxsw_sp_kvdl_part *part; struct mlxsw_sp_kvdl_part *part_prev)
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)
{
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;
}
}
static int mlxsw_sp_kvdl_part_init(struct mlxsw_sp *mlxsw_sp,
unsigned int part_index)
{ {
struct devlink *devlink = priv_to_devlink(mlxsw_sp->core); 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; struct mlxsw_sp_kvdl_part *part;
bool need_update = true; bool need_update = true;
unsigned int nr_entries; unsigned int nr_entries;
@ -258,23 +240,8 @@ static int mlxsw_sp_kvdl_part_init(struct mlxsw_sp *mlxsw_sp,
u64 resource_size; u64 resource_size;
int err; int err;
info = &kvdl_parts_info[part_index]; err = devlink_resource_size_get(devlink, info->resource_id,
&resource_size);
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);
if (err) { if (err) {
need_update = false; need_update = false;
resource_size = info->end_index - info->start_index + 1; 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); usage_size = BITS_TO_LONGS(nr_entries) * sizeof(unsigned long);
part = kzalloc(sizeof(*part) + usage_size, GFP_KERNEL); part = kzalloc(sizeof(*part) + usage_size, GFP_KERNEL);
if (!part) if (!part)
return -ENOMEM; return ERR_PTR(-ENOMEM);
part->info = kmemdup(info, sizeof(*part->info), GFP_KERNEL); memcpy(&part->info, info, sizeof(part->info));
if (!part->info)
goto err_part_info_alloc;
list_add(&part->list, &mlxsw_sp->kvdl->parts_list);
if (need_update) if (need_update)
mlxsw_sp_kvdl_part_update(mlxsw_sp, part, resource_size); mlxsw_sp_kvdl_part_update(part, part_prev, resource_size);
return 0; return part;
err_part_info_alloc:
kfree(part);
return -ENOMEM;
} }
static void mlxsw_sp_kvdl_part_fini(struct mlxsw_sp *mlxsw_sp, static void mlxsw_sp_kvdl_part_fini(struct mlxsw_sp_kvdl_part *part)
unsigned int part_index)
{ {
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); kfree(part);
} }
static int mlxsw_sp_kvdl_parts_init(struct mlxsw_sp *mlxsw_sp) 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; int err, i;
INIT_LIST_HEAD(&mlxsw_sp->kvdl->parts_list); for (i = 0; i < MLXSW_SP_KVDL_PARTS_INFO_LEN; i++) {
info = &mlxsw_sp_kvdl_parts_info[i];
for (i = 0; i < ARRAY_SIZE(kvdl_parts_info); i++) { kvdl->parts[i] = mlxsw_sp_kvdl_part_init(mlxsw_sp, info,
err = mlxsw_sp_kvdl_part_init(mlxsw_sp, i); part_prev);
if (err) if (IS_ERR(kvdl->parts[i])) {
err = PTR_ERR(kvdl->parts[i]);
goto err_kvdl_part_init; goto err_kvdl_part_init;
}
part_prev = kvdl->parts[i];
} }
return 0; return 0;
err_kvdl_part_init: err_kvdl_part_init:
for (i--; i >= 0; i--) for (i--; i >= 0; i--)
mlxsw_sp_kvdl_part_fini(mlxsw_sp, i); mlxsw_sp_kvdl_part_fini(kvdl->parts[i]);
return err; return err;
} }
static void mlxsw_sp_kvdl_parts_fini(struct mlxsw_sp *mlxsw_sp) static void mlxsw_sp_kvdl_parts_fini(struct mlxsw_sp *mlxsw_sp)
{ {
struct mlxsw_sp_kvdl *kvdl = mlxsw_sp->kvdl;
int i; int i;
for (i = ARRAY_SIZE(kvdl_parts_info) - 1; i >= 0; i--) for (i = 0; i < MLXSW_SP_KVDL_PARTS_INFO_LEN; i++)
mlxsw_sp_kvdl_part_fini(mlxsw_sp, i); mlxsw_sp_kvdl_part_fini(kvdl->parts[i]);
} }
static u64 mlxsw_sp_kvdl_part_occ(struct mlxsw_sp_kvdl_part *part) 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; unsigned int nr_entries;
int bit = -1; int bit = -1;
u64 occ = 0; u64 occ = 0;
nr_entries = (part->info->end_index - nr_entries = (info->end_index -
part->info->start_index + 1) / info->start_index + 1) /
part->info->alloc_size; info->alloc_size;
while ((bit = find_next_bit(part->usage, nr_entries, bit + 1)) while ((bit = find_next_bit(part->usage, nr_entries, bit + 1))
< nr_entries) < nr_entries)
occ += part->info->alloc_size; occ += info->alloc_size;
return occ; return occ;
} }
u64 mlxsw_sp_kvdl_occ_get(const struct mlxsw_sp *mlxsw_sp) u64 mlxsw_sp_kvdl_occ_get(const struct mlxsw_sp *mlxsw_sp)
{ {
struct mlxsw_sp_kvdl_part *part;
u64 occ = 0; u64 occ = 0;
int i;
list_for_each_entry(part, &mlxsw_sp->kvdl->parts_list, list) for (i = 0; i < MLXSW_SP_KVDL_PARTS_INFO_LEN; i++)
occ += mlxsw_sp_kvdl_part_occ(part); occ += mlxsw_sp_kvdl_part_occ(mlxsw_sp->kvdl->parts[i]);
return occ; 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 *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
struct mlxsw_sp_kvdl_part *part; struct mlxsw_sp_kvdl_part *part;
part = mlxsw_sp_kvdl_part_find(mlxsw_sp, MLXSW_SP_KVDL_PART_SINGLE); part = mlxsw_sp->kvdl->parts[MLXSW_SP_KVDL_PART_ID_SINGLE];
if (!part)
return -EINVAL;
return mlxsw_sp_kvdl_part_occ(part); 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 *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
struct mlxsw_sp_kvdl_part *part; struct mlxsw_sp_kvdl_part *part;
part = mlxsw_sp_kvdl_part_find(mlxsw_sp, MLXSW_SP_KVDL_PART_CHUNKS); part = mlxsw_sp->kvdl->parts[MLXSW_SP_KVDL_PART_ID_CHUNKS];
if (!part)
return -EINVAL;
return mlxsw_sp_kvdl_part_occ(part); 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 *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
struct mlxsw_sp_kvdl_part *part; struct mlxsw_sp_kvdl_part *part;
part = mlxsw_sp_kvdl_part_find(mlxsw_sp, part = mlxsw_sp->kvdl->parts[MLXSW_SP_KVDL_PART_ID_LARGE_CHUNKS];
MLXSW_SP_KVDL_PART_LARGE_CHUNKS);
if (!part)
return -EINVAL;
return mlxsw_sp_kvdl_part_occ(part); 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_SINGLE_MIN_SIZE) -
MLXSW_CORE_RES_GET(mlxsw_core, KVD_DOUBLE_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); DEVLINK_RESOURCE_UNIT_ENTRY);
err = devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_SINGLES, err = devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_SINGLES,
MLXSW_SP_KVDL_SINGLE_SIZE, MLXSW_SP_KVDL_SINGLE_SIZE,
@ -443,7 +392,7 @@ int mlxsw_sp_kvdl_resources_register(struct devlink *devlink)
return err; return err;
devlink_resource_size_params_init(&size_params, 0, kvdl_max_size, 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); DEVLINK_RESOURCE_UNIT_ENTRY);
err = devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_CHUNKS, err = devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_CHUNKS,
MLXSW_SP_KVDL_CHUNKS_SIZE, MLXSW_SP_KVDL_CHUNKS_SIZE,
@ -455,7 +404,7 @@ int mlxsw_sp_kvdl_resources_register(struct devlink *devlink)
return err; return err;
devlink_resource_size_params_init(&size_params, 0, kvdl_max_size, 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); DEVLINK_RESOURCE_UNIT_ENTRY);
err = devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_LARGE_CHUNKS, err = devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_LARGE_CHUNKS,
MLXSW_SP_KVDL_LARGE_CHUNKS_SIZE, MLXSW_SP_KVDL_LARGE_CHUNKS_SIZE,