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net: ena: ethtool: add extra properties retrieval via get_priv_flags

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This commit adds a mechanism for exposing different device
properties via ethtool's priv_flags. The strings are provided
by the device and copied to user space through the driver.

In this commit we:

Add commands, structs and defines necessary for handling
extra properties

Add functions for:
Allocation/destruction of a buffer for extra properties strings.
Retreival of extra properties strings and flags from the network device.

Handle the allocation of a buffer for extra properties strings.

* Initialize buffer with extra properties strings from the
  network device at driver startup.

Use ethtool's get_priv_flags to expose extra properties of
the ENA device

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arthur Kiyanovski 2019-06-03 17:43:20 +03:00 committed by David S. Miller
parent 05d62ca218
commit 315c28d2b7
6 changed files with 184 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/net/ethernet/amazon/ena/ena_admin_defs.h
View File

@ -32,6 +32,8 @@
#ifndef _ENA_ADMIN_H_
#define _ENA_ADMIN_H_
#define ENA_ADMIN_EXTRA_PROPERTIES_STRING_LEN 32
#define ENA_ADMIN_EXTRA_PROPERTIES_COUNT 32
enum ena_admin_aq_opcode {
ENA_ADMIN_CREATE_SQ = 1,
@ -60,6 +62,8 @@ enum ena_admin_aq_feature_id {
ENA_ADMIN_MAX_QUEUES_NUM = 2,
ENA_ADMIN_HW_HINTS = 3,
ENA_ADMIN_LLQ = 4,
ENA_ADMIN_EXTRA_PROPERTIES_STRINGS = 5,
ENA_ADMIN_EXTRA_PROPERTIES_FLAGS = 6,
ENA_ADMIN_RSS_HASH_FUNCTION = 10,
ENA_ADMIN_STATELESS_OFFLOAD_CONFIG = 11,
ENA_ADMIN_RSS_REDIRECTION_TABLE_CONFIG = 12,
@ -560,6 +564,14 @@ struct ena_admin_set_feature_mtu_desc {
u32 mtu;
};
struct ena_admin_get_extra_properties_strings_desc {
u32 count;
};
struct ena_admin_get_extra_properties_flags_desc {
u32 flags;
};
struct ena_admin_set_feature_host_attr_desc {
/* host OS info base address in OS memory. host info is 4KB of
* physically contiguous
@ -864,6 +876,10 @@ struct ena_admin_get_feat_resp {
struct ena_admin_feature_intr_moder_desc intr_moderation;
struct ena_admin_ena_hw_hints hw_hints;
struct ena_admin_get_extra_properties_strings_desc extra_properties_strings;
struct ena_admin_get_extra_properties_flags_desc extra_properties_flags;
} u;
};

56
drivers/net/ethernet/amazon/ena/ena_com.c
View File

@ -1877,6 +1877,62 @@ int ena_com_get_link_params(struct ena_com_dev *ena_dev,
return ena_com_get_feature(ena_dev, resp, ENA_ADMIN_LINK_CONFIG);
}
int ena_com_extra_properties_strings_init(struct ena_com_dev *ena_dev)
{
struct ena_admin_get_feat_resp resp;
struct ena_extra_properties_strings *extra_properties_strings =
&ena_dev->extra_properties_strings;
u32 rc;
extra_properties_strings->size = ENA_ADMIN_EXTRA_PROPERTIES_COUNT *
ENA_ADMIN_EXTRA_PROPERTIES_STRING_LEN;
extra_properties_strings->virt_addr =
dma_alloc_coherent(ena_dev->dmadev,
extra_properties_strings->size,
&extra_properties_strings->dma_addr,
GFP_KERNEL);
if (unlikely(!extra_properties_strings->virt_addr)) {
pr_err("Failed to allocate extra properties strings\n");
return 0;
}
rc = ena_com_get_feature_ex(ena_dev, &resp,
ENA_ADMIN_EXTRA_PROPERTIES_STRINGS,
extra_properties_strings->dma_addr,
extra_properties_strings->size);
if (rc) {
pr_debug("Failed to get extra properties strings\n");
goto err;
}
return resp.u.extra_properties_strings.count;
err:
ena_com_delete_extra_properties_strings(ena_dev);
return 0;
}
void ena_com_delete_extra_properties_strings(struct ena_com_dev *ena_dev)
{
struct ena_extra_properties_strings *extra_properties_strings =
&ena_dev->extra_properties_strings;
if (extra_properties_strings->virt_addr) {
dma_free_coherent(ena_dev->dmadev,
extra_properties_strings->size,
extra_properties_strings->virt_addr,
extra_properties_strings->dma_addr);
extra_properties_strings->virt_addr = NULL;
}
}
int ena_com_get_extra_properties_flags(struct ena_com_dev *ena_dev,
struct ena_admin_get_feat_resp *resp)
{
return ena_com_get_feature(ena_dev, resp,
ENA_ADMIN_EXTRA_PROPERTIES_FLAGS);
}
int ena_com_get_dev_attr_feat(struct ena_com_dev *ena_dev,
struct ena_com_dev_get_features_ctx *get_feat_ctx)
{

32
drivers/net/ethernet/amazon/ena/ena_com.h
View File

@ -347,6 +347,12 @@ struct ena_host_attribute {
dma_addr_t host_info_dma_addr;
};
struct ena_extra_properties_strings {
u8 *virt_addr;
dma_addr_t dma_addr;
u32 size;
};
/* Each ena_dev is a PCI function. */
struct ena_com_dev {
struct ena_com_admin_queue admin_queue;
@ -375,6 +381,7 @@ struct ena_com_dev {
struct ena_intr_moder_entry *intr_moder_tbl;
struct ena_com_llq_info llq_info;
struct ena_extra_properties_strings extra_properties_strings;
};
struct ena_com_dev_get_features_ctx {
@ -596,6 +603,31 @@ int ena_com_validate_version(struct ena_com_dev *ena_dev);
int ena_com_get_link_params(struct ena_com_dev *ena_dev,
struct ena_admin_get_feat_resp *resp);
/* ena_com_extra_properties_strings_init - Initialize the extra properties strings buffer.
* @ena_dev: ENA communication layer struct
*
* Initialize the extra properties strings buffer.
*/
int ena_com_extra_properties_strings_init(struct ena_com_dev *ena_dev);
/* ena_com_delete_extra_properties_strings - Free the extra properties strings buffer.
* @ena_dev: ENA communication layer struct
*
* Free the allocated extra properties strings buffer.
*/
void ena_com_delete_extra_properties_strings(struct ena_com_dev *ena_dev);
/* ena_com_get_extra_properties_flags - Retrieve extra properties flags.
* @ena_dev: ENA communication layer struct
* @resp: Extra properties flags.
*
* Retrieve the extra properties flags.
*
* @return - 0 on Success negative value otherwise.
*/
int ena_com_get_extra_properties_flags(struct ena_com_dev *ena_dev,
struct ena_admin_get_feat_resp *resp);
/* ena_com_get_dma_width - Retrieve physical dma address width the device
* supports.
* @ena_dev: ENA communication layer struct

75
drivers/net/ethernet/amazon/ena/ena_ethtool.c
View File

@ -197,15 +197,24 @@ static void ena_get_ethtool_stats(struct net_device *netdev,
ena_dev_admin_queue_stats(adapter, &data);
}
static int get_stats_sset_count(struct ena_adapter *adapter)
{
return adapter->num_queues * (ENA_STATS_ARRAY_TX + ENA_STATS_ARRAY_RX)
+ ENA_STATS_ARRAY_GLOBAL + ENA_STATS_ARRAY_ENA_COM;
}
int ena_get_sset_count(struct net_device *netdev, int sset)
{
struct ena_adapter *adapter = netdev_priv(netdev);
if (sset != ETH_SS_STATS)
switch (sset) {
case ETH_SS_STATS:
return get_stats_sset_count(adapter);
case ETH_SS_PRIV_FLAGS:
return adapter->ena_extra_properties_count;
default:
return -EOPNOTSUPP;
return adapter->num_queues * (ENA_STATS_ARRAY_TX + ENA_STATS_ARRAY_RX)
+ ENA_STATS_ARRAY_GLOBAL + ENA_STATS_ARRAY_ENA_COM;
}
}
static void ena_queue_strings(struct ena_adapter *adapter, u8 **data)
@ -247,26 +256,54 @@ static void ena_com_dev_strings(u8 **data)
}
}
static void ena_get_strings(struct net_device *netdev, u32 sset, u8 *data)
static void get_stats_strings(struct ena_adapter *adapter, u8 *data)
{
struct ena_adapter *adapter = netdev_priv(netdev);
const struct ena_stats *ena_stats;
int i;
if (sset != ETH_SS_STATS)
return;
for (i = 0; i < ENA_STATS_ARRAY_GLOBAL; i++) {
ena_stats = &ena_stats_global_strings[i];
memcpy(data, ena_stats->name, ETH_GSTRING_LEN);
data += ETH_GSTRING_LEN;
}
ena_queue_strings(adapter, &data);
ena_com_dev_strings(&data);
}
static void get_private_flags_strings(struct ena_adapter *adapter, u8 *data)
{
struct ena_com_dev *ena_dev = adapter->ena_dev;
u8 *strings = ena_dev->extra_properties_strings.virt_addr;
int i;
if (unlikely(!strings)) {
adapter->ena_extra_properties_count = 0;
return;
}
for (i = 0; i < adapter->ena_extra_properties_count; i++) {
strlcpy(data, strings + ENA_ADMIN_EXTRA_PROPERTIES_STRING_LEN * i,
ETH_GSTRING_LEN);
data += ETH_GSTRING_LEN;
}
}
static void ena_get_strings(struct net_device *netdev, u32 sset, u8 *data)
{
struct ena_adapter *adapter = netdev_priv(netdev);
switch (sset) {
case ETH_SS_STATS:
get_stats_strings(adapter, data);
break;
case ETH_SS_PRIV_FLAGS:
get_private_flags_strings(adapter, data);
break;
default:
break;
}
}
static int ena_get_link_ksettings(struct net_device *netdev,
struct ethtool_link_ksettings *link_ksettings)
{
@ -441,6 +478,7 @@ static void ena_get_drvinfo(struct net_device *dev,
strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
strlcpy(info->bus_info, pci_name(adapter->pdev),
sizeof(info->bus_info));
info->n_priv_flags = adapter->ena_extra_properties_count;
}
static void ena_get_ringparam(struct net_device *netdev,
@ -798,6 +836,20 @@ static int ena_set_tunable(struct net_device *netdev,
return ret;
}
static u32 ena_get_priv_flags(struct net_device *netdev)
{
struct ena_adapter *adapter = netdev_priv(netdev);
struct ena_com_dev *ena_dev = adapter->ena_dev;
struct ena_admin_get_feat_resp get_resp;
u32 rc;
rc = ena_com_get_extra_properties_flags(ena_dev, &get_resp);
if (!rc)
return get_resp.u.extra_properties_flags.flags;
return 0;
}
static const struct ethtool_ops ena_ethtool_ops = {
.get_link_ksettings = ena_get_link_ksettings,
.get_drvinfo = ena_get_drvinfo,
@ -819,6 +871,7 @@ static const struct ethtool_ops ena_ethtool_ops = {
.get_channels = ena_get_channels,
.get_tunable = ena_get_tunable,
.set_tunable = ena_set_tunable,
.get_priv_flags = ena_get_priv_flags,
};
void ena_set_ethtool_ops(struct net_device *netdev)

14
drivers/net/ethernet/amazon/ena/ena_netdev.c
View File

@ -2369,6 +2369,14 @@ err:
ena_com_delete_debug_area(adapter->ena_dev);
}
static void ena_extra_properties_strings_destroy(struct net_device *netdev)
{
struct ena_adapter *adapter = netdev_priv(netdev);
ena_com_delete_extra_properties_strings(adapter->ena_dev);
adapter->ena_extra_properties_count = 0;
}
static void ena_get_stats64(struct net_device *netdev,
struct rtnl_link_stats64 *stats)
{
@ -3424,6 +3432,9 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
ena_config_debug_area(adapter);
adapter->ena_extra_properties_count =
ena_com_extra_properties_strings_init(ena_dev);
memcpy(adapter->netdev->perm_addr, adapter->mac_addr, netdev->addr_len);
netif_carrier_off(netdev);
@ -3463,6 +3474,7 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
return 0;
err_rss:
ena_extra_properties_strings_destroy(netdev);
ena_com_delete_debug_area(ena_dev);
ena_com_rss_destroy(ena_dev);
err_free_msix:
@ -3529,6 +3541,8 @@ static void ena_remove(struct pci_dev *pdev)
ena_com_delete_host_info(ena_dev);
ena_extra_properties_strings_destroy(netdev);
ena_release_bars(ena_dev, pdev);
pci_disable_device(pdev);

2
drivers/net/ethernet/amazon/ena/ena_netdev.h
View File

@ -364,6 +364,8 @@ struct ena_adapter {
u32 last_monitored_tx_qid;
enum ena_regs_reset_reason_types reset_reason;
u8 ena_extra_properties_count;
};
void ena_set_ethtool_ops(struct net_device *netdev);