diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/rl.c')
-rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/rl.c | 266 |
1 files changed, 189 insertions, 77 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/rl.c b/drivers/net/ethernet/mellanox/mlx5/core/rl.c index 01c380425f9d..9f8b4005f4bd 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/rl.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/rl.c @@ -31,17 +31,15 @@ */ #include <linux/kernel.h> -#include <linux/module.h> #include <linux/mlx5/driver.h> -#include <linux/mlx5/cmd.h> #include "mlx5_core.h" /* Scheduling element fw management */ int mlx5_create_scheduling_element_cmd(struct mlx5_core_dev *dev, u8 hierarchy, void *ctx, u32 *element_id) { - u32 in[MLX5_ST_SZ_DW(create_scheduling_element_in)] = {0}; - u32 out[MLX5_ST_SZ_DW(create_scheduling_element_in)] = {0}; + u32 out[MLX5_ST_SZ_DW(create_scheduling_element_in)] = {}; + u32 in[MLX5_ST_SZ_DW(create_scheduling_element_in)] = {}; void *schedc; int err; @@ -53,7 +51,7 @@ int mlx5_create_scheduling_element_cmd(struct mlx5_core_dev *dev, u8 hierarchy, hierarchy); memcpy(schedc, ctx, MLX5_ST_SZ_BYTES(scheduling_context)); - err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); + err = mlx5_cmd_exec_inout(dev, create_scheduling_element, in, out); if (err) return err; @@ -66,8 +64,7 @@ int mlx5_modify_scheduling_element_cmd(struct mlx5_core_dev *dev, u8 hierarchy, void *ctx, u32 element_id, u32 modify_bitmask) { - u32 in[MLX5_ST_SZ_DW(modify_scheduling_element_in)] = {0}; - u32 out[MLX5_ST_SZ_DW(modify_scheduling_element_in)] = {0}; + u32 in[MLX5_ST_SZ_DW(modify_scheduling_element_in)] = {}; void *schedc; schedc = MLX5_ADDR_OF(modify_scheduling_element_in, in, @@ -82,14 +79,13 @@ int mlx5_modify_scheduling_element_cmd(struct mlx5_core_dev *dev, u8 hierarchy, hierarchy); memcpy(schedc, ctx, MLX5_ST_SZ_BYTES(scheduling_context)); - return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); + return mlx5_cmd_exec_in(dev, modify_scheduling_element, in); } int mlx5_destroy_scheduling_element_cmd(struct mlx5_core_dev *dev, u8 hierarchy, u32 element_id) { - u32 in[MLX5_ST_SZ_DW(destroy_scheduling_element_in)] = {0}; - u32 out[MLX5_ST_SZ_DW(destroy_scheduling_element_in)] = {0}; + u32 in[MLX5_ST_SZ_DW(destroy_scheduling_element_in)] = {}; MLX5_SET(destroy_scheduling_element_in, in, opcode, MLX5_CMD_OP_DESTROY_SCHEDULING_ELEMENT); @@ -98,7 +94,14 @@ int mlx5_destroy_scheduling_element_cmd(struct mlx5_core_dev *dev, u8 hierarchy, MLX5_SET(destroy_scheduling_element_in, in, scheduling_hierarchy, hierarchy); - return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); + return mlx5_cmd_exec_in(dev, destroy_scheduling_element, in); +} + +static bool mlx5_rl_are_equal_raw(struct mlx5_rl_entry *entry, void *rl_in, + u16 uid) +{ + return (!memcmp(entry->rl_raw, rl_in, sizeof(entry->rl_raw)) && + entry->uid == uid); } /* Finds an entry where we can register the given rate @@ -107,16 +110,29 @@ int mlx5_destroy_scheduling_element_cmd(struct mlx5_core_dev *dev, u8 hierarchy, * If the table is full, return NULL */ static struct mlx5_rl_entry *find_rl_entry(struct mlx5_rl_table *table, - struct mlx5_rate_limit *rl) + void *rl_in, u16 uid, bool dedicated) { struct mlx5_rl_entry *ret_entry = NULL; bool empty_found = false; int i; + lockdep_assert_held(&table->rl_lock); + WARN_ON(!table->rl_entry); + for (i = 0; i < table->max_size; i++) { - if (mlx5_rl_are_equal(&table->rl_entry[i].rl, rl)) - return &table->rl_entry[i]; - if (!empty_found && !table->rl_entry[i].rl.rate) { + if (dedicated) { + if (!table->rl_entry[i].refcount) + return &table->rl_entry[i]; + continue; + } + + if (table->rl_entry[i].refcount) { + if (table->rl_entry[i].dedicated) + continue; + if (mlx5_rl_are_equal_raw(&table->rl_entry[i], rl_in, + uid)) + return &table->rl_entry[i]; + } else if (!empty_found) { empty_found = true; ret_entry = &table->rl_entry[i]; } @@ -126,19 +142,19 @@ static struct mlx5_rl_entry *find_rl_entry(struct mlx5_rl_table *table, } static int mlx5_set_pp_rate_limit_cmd(struct mlx5_core_dev *dev, - u16 index, - struct mlx5_rate_limit *rl) + struct mlx5_rl_entry *entry, bool set) { - u32 in[MLX5_ST_SZ_DW(set_pp_rate_limit_in)] = {0}; - u32 out[MLX5_ST_SZ_DW(set_pp_rate_limit_out)] = {0}; + u32 in[MLX5_ST_SZ_DW(set_pp_rate_limit_in)] = {}; + void *pp_context; + pp_context = MLX5_ADDR_OF(set_pp_rate_limit_in, in, ctx); MLX5_SET(set_pp_rate_limit_in, in, opcode, MLX5_CMD_OP_SET_PP_RATE_LIMIT); - MLX5_SET(set_pp_rate_limit_in, in, rate_limit_index, index); - MLX5_SET(set_pp_rate_limit_in, in, rate_limit, rl->rate); - MLX5_SET(set_pp_rate_limit_in, in, burst_upper_bound, rl->max_burst_sz); - MLX5_SET(set_pp_rate_limit_in, in, typical_packet_size, rl->typical_pkt_sz); - return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); + MLX5_SET(set_pp_rate_limit_in, in, uid, entry->uid); + MLX5_SET(set_pp_rate_limit_in, in, rate_limit_index, entry->index); + if (set) + memcpy(pp_context, entry->rl_raw, sizeof(entry->rl_raw)); + return mlx5_cmd_exec_in(dev, set_pp_rate_limit, in); } bool mlx5_rl_is_in_range(struct mlx5_core_dev *dev, u32 rate) @@ -158,77 +174,189 @@ bool mlx5_rl_are_equal(struct mlx5_rate_limit *rl_0, } EXPORT_SYMBOL(mlx5_rl_are_equal); -int mlx5_rl_add_rate(struct mlx5_core_dev *dev, u16 *index, - struct mlx5_rate_limit *rl) +static int mlx5_rl_table_get(struct mlx5_rl_table *table) +{ + int i; + + lockdep_assert_held(&table->rl_lock); + + if (table->rl_entry) { + table->refcount++; + return 0; + } + + table->rl_entry = kcalloc(table->max_size, sizeof(struct mlx5_rl_entry), + GFP_KERNEL); + if (!table->rl_entry) + return -ENOMEM; + + /* The index represents the index in HW rate limit table + * Index 0 is reserved for unlimited rate + */ + for (i = 0; i < table->max_size; i++) + table->rl_entry[i].index = i + 1; + + table->refcount++; + return 0; +} + +static void mlx5_rl_table_put(struct mlx5_rl_table *table) +{ + lockdep_assert_held(&table->rl_lock); + if (--table->refcount) + return; + + kfree(table->rl_entry); + table->rl_entry = NULL; +} + +static void mlx5_rl_table_free(struct mlx5_core_dev *dev, struct mlx5_rl_table *table) +{ + int i; + + if (!table->rl_entry) + return; + + /* Clear all configured rates */ + for (i = 0; i < table->max_size; i++) + if (table->rl_entry[i].refcount) + mlx5_set_pp_rate_limit_cmd(dev, &table->rl_entry[i], false); + kfree(table->rl_entry); +} + +static void mlx5_rl_entry_get(struct mlx5_rl_entry *entry) +{ + entry->refcount++; +} + +static void +mlx5_rl_entry_put(struct mlx5_core_dev *dev, struct mlx5_rl_entry *entry) +{ + entry->refcount--; + if (!entry->refcount) + mlx5_set_pp_rate_limit_cmd(dev, entry, false); +} + +int mlx5_rl_add_rate_raw(struct mlx5_core_dev *dev, void *rl_in, u16 uid, + bool dedicated_entry, u16 *index) { struct mlx5_rl_table *table = &dev->priv.rl_table; struct mlx5_rl_entry *entry; - int err = 0; + u32 rate; + int err; - mutex_lock(&table->rl_lock); + if (!table->max_size) + return -EOPNOTSUPP; - if (!rl->rate || !mlx5_rl_is_in_range(dev, rl->rate)) { + rate = MLX5_GET(set_pp_rate_limit_context, rl_in, rate_limit); + if (!rate || !mlx5_rl_is_in_range(dev, rate)) { mlx5_core_err(dev, "Invalid rate: %u, should be %u to %u\n", - rl->rate, table->min_rate, table->max_rate); - err = -EINVAL; - goto out; + rate, table->min_rate, table->max_rate); + return -EINVAL; } - entry = find_rl_entry(table, rl); + mutex_lock(&table->rl_lock); + err = mlx5_rl_table_get(table); + if (err) + goto out; + + entry = find_rl_entry(table, rl_in, uid, dedicated_entry); if (!entry) { mlx5_core_err(dev, "Max number of %u rates reached\n", table->max_size); err = -ENOSPC; - goto out; + goto rl_err; } - if (entry->refcount) { - /* rate already configured */ - entry->refcount++; - } else { + if (!entry->refcount) { /* new rate limit */ - err = mlx5_set_pp_rate_limit_cmd(dev, entry->index, rl); + memcpy(entry->rl_raw, rl_in, sizeof(entry->rl_raw)); + entry->uid = uid; + err = mlx5_set_pp_rate_limit_cmd(dev, entry, true); if (err) { - mlx5_core_err(dev, "Failed configuring rate limit(err %d): rate %u, max_burst_sz %u, typical_pkt_sz %u\n", - err, rl->rate, rl->max_burst_sz, - rl->typical_pkt_sz); - goto out; + mlx5_core_err( + dev, + "Failed configuring rate limit(err %d): rate %u, max_burst_sz %u, typical_pkt_sz %u\n", + err, rate, + MLX5_GET(set_pp_rate_limit_context, rl_in, + burst_upper_bound), + MLX5_GET(set_pp_rate_limit_context, rl_in, + typical_packet_size)); + goto rl_err; } - entry->rl = *rl; - entry->refcount = 1; + + entry->dedicated = dedicated_entry; } + mlx5_rl_entry_get(entry); *index = entry->index; + mutex_unlock(&table->rl_lock); + return 0; +rl_err: + mlx5_rl_table_put(table); out: mutex_unlock(&table->rl_lock); return err; } +EXPORT_SYMBOL(mlx5_rl_add_rate_raw); + +void mlx5_rl_remove_rate_raw(struct mlx5_core_dev *dev, u16 index) +{ + struct mlx5_rl_table *table = &dev->priv.rl_table; + struct mlx5_rl_entry *entry; + + mutex_lock(&table->rl_lock); + entry = &table->rl_entry[index - 1]; + mlx5_rl_entry_put(dev, entry); + mlx5_rl_table_put(table); + mutex_unlock(&table->rl_lock); +} +EXPORT_SYMBOL(mlx5_rl_remove_rate_raw); + +int mlx5_rl_add_rate(struct mlx5_core_dev *dev, u16 *index, + struct mlx5_rate_limit *rl) +{ + u8 rl_raw[MLX5_ST_SZ_BYTES(set_pp_rate_limit_context)] = {}; + + MLX5_SET(set_pp_rate_limit_context, rl_raw, rate_limit, rl->rate); + MLX5_SET(set_pp_rate_limit_context, rl_raw, burst_upper_bound, + rl->max_burst_sz); + MLX5_SET(set_pp_rate_limit_context, rl_raw, typical_packet_size, + rl->typical_pkt_sz); + + return mlx5_rl_add_rate_raw(dev, rl_raw, + MLX5_CAP_QOS(dev, packet_pacing_uid) ? + MLX5_SHARED_RESOURCE_UID : 0, + false, index); +} EXPORT_SYMBOL(mlx5_rl_add_rate); void mlx5_rl_remove_rate(struct mlx5_core_dev *dev, struct mlx5_rate_limit *rl) { + u8 rl_raw[MLX5_ST_SZ_BYTES(set_pp_rate_limit_context)] = {}; struct mlx5_rl_table *table = &dev->priv.rl_table; struct mlx5_rl_entry *entry = NULL; - struct mlx5_rate_limit reset_rl = {0}; /* 0 is a reserved value for unlimited rate */ if (rl->rate == 0) return; + MLX5_SET(set_pp_rate_limit_context, rl_raw, rate_limit, rl->rate); + MLX5_SET(set_pp_rate_limit_context, rl_raw, burst_upper_bound, + rl->max_burst_sz); + MLX5_SET(set_pp_rate_limit_context, rl_raw, typical_packet_size, + rl->typical_pkt_sz); + mutex_lock(&table->rl_lock); - entry = find_rl_entry(table, rl); + entry = find_rl_entry(table, rl_raw, + MLX5_CAP_QOS(dev, packet_pacing_uid) ? + MLX5_SHARED_RESOURCE_UID : 0, false); if (!entry || !entry->refcount) { mlx5_core_warn(dev, "Rate %u, max_burst_sz %u typical_pkt_sz %u are not configured\n", rl->rate, rl->max_burst_sz, rl->typical_pkt_sz); goto out; } - - entry->refcount--; - if (!entry->refcount) { - /* need to remove rate */ - mlx5_set_pp_rate_limit_cmd(dev, entry->index, &reset_rl); - entry->rl = reset_rl; - } - + mlx5_rl_entry_put(dev, entry); + mlx5_rl_table_put(table); out: mutex_unlock(&table->rl_lock); } @@ -237,31 +365,19 @@ EXPORT_SYMBOL(mlx5_rl_remove_rate); int mlx5_init_rl_table(struct mlx5_core_dev *dev) { struct mlx5_rl_table *table = &dev->priv.rl_table; - int i; - mutex_init(&table->rl_lock); if (!MLX5_CAP_GEN(dev, qos) || !MLX5_CAP_QOS(dev, packet_pacing)) { table->max_size = 0; return 0; } + mutex_init(&table->rl_lock); + /* First entry is reserved for unlimited rate */ table->max_size = MLX5_CAP_QOS(dev, packet_pacing_rate_table_size) - 1; table->max_rate = MLX5_CAP_QOS(dev, packet_pacing_max_rate); table->min_rate = MLX5_CAP_QOS(dev, packet_pacing_min_rate); - table->rl_entry = kcalloc(table->max_size, sizeof(struct mlx5_rl_entry), - GFP_KERNEL); - if (!table->rl_entry) - return -ENOMEM; - - /* The index represents the index in HW rate limit table - * Index 0 is reserved for unlimited rate - */ - for (i = 0; i < table->max_size; i++) - table->rl_entry[i].index = i + 1; - - /* Index 0 is reserved */ mlx5_core_info(dev, "Rate limit: %u rates are supported, range: %uMbps to %uMbps\n", table->max_size, table->min_rate >> 10, @@ -273,14 +389,10 @@ int mlx5_init_rl_table(struct mlx5_core_dev *dev) void mlx5_cleanup_rl_table(struct mlx5_core_dev *dev) { struct mlx5_rl_table *table = &dev->priv.rl_table; - struct mlx5_rate_limit rl = {0}; - int i; - /* Clear all configured rates */ - for (i = 0; i < table->max_size; i++) - if (table->rl_entry[i].rl.rate) - mlx5_set_pp_rate_limit_cmd(dev, table->rl_entry[i].index, - &rl); + if (!MLX5_CAP_GEN(dev, qos) || !MLX5_CAP_QOS(dev, packet_pacing)) + return; - kfree(dev->priv.rl_table.rl_entry); + mlx5_rl_table_free(dev, table); + mutex_destroy(&table->rl_lock); } |