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drivers: ethernet: xlnx_gem: enable querying of HW checksum support

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Add a get_config function for this driver as specified in the
Ethernet subsystem API. The implementation supports querying
the hardware checksum generation capabilities of the specified
GEM device instance. This prevents the transmission of packages
without a valid checksum for protocols such as ICMP, as the
hardware only supports IPv4/IPv6 TCP and UDP checksum generation.

Signed-off-by: Immo Birnbaum <mail@birnbaum.immo>
This commit is contained in:
Immo Birnbaum 2024-12-14 13:50:40 +01:00 committed by Benjamin Cabé
parent 01fc0a750a
commit 63b65299df
1 changed files with 56 additions and 0 deletions
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56
drivers/ethernet/eth_xlnx_gem.c
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@ -45,6 +45,9 @@ static int eth_xlnx_gem_start_device(const struct device *dev);
static int eth_xlnx_gem_stop_device(const struct device *dev); static int eth_xlnx_gem_stop_device(const struct device *dev);
static enum ethernet_hw_caps static enum ethernet_hw_caps
eth_xlnx_gem_get_capabilities(const struct device *dev); eth_xlnx_gem_get_capabilities(const struct device *dev);
static int eth_xlnx_gem_get_config(const struct device *dev,
enum ethernet_config_type type,
struct ethernet_config *config);
#if defined(CONFIG_NET_STATISTICS_ETHERNET) #if defined(CONFIG_NET_STATISTICS_ETHERNET)
static struct net_stats_eth *eth_xlnx_gem_stats(const struct device *dev); static struct net_stats_eth *eth_xlnx_gem_stats(const struct device *dev);
#endif #endif
@ -69,6 +72,7 @@ static const struct ethernet_api eth_xlnx_gem_apis = {
.send = eth_xlnx_gem_send, .send = eth_xlnx_gem_send,
.start = eth_xlnx_gem_start_device, .start = eth_xlnx_gem_start_device,
.stop = eth_xlnx_gem_stop_device, .stop = eth_xlnx_gem_stop_device,
.get_config = eth_xlnx_gem_get_config,
#if defined(CONFIG_NET_STATISTICS_ETHERNET) #if defined(CONFIG_NET_STATISTICS_ETHERNET)
.get_stats = eth_xlnx_gem_stats, .get_stats = eth_xlnx_gem_stats,
#endif #endif
@ -654,6 +658,58 @@ static enum ethernet_hw_caps eth_xlnx_gem_get_capabilities(
return caps; return caps;
} }
/**
* @brief GEM hardware configuration data request function
* Returns hardware configuration details of the specified device
* instance. Multiple hardware configuration items can be queried
* depending on the type parameter. The range of configuration items
* that can be queried is specified by the Ethernet subsystem.
* The queried configuration data is returned via a struct which can
* accommodate for all supported configuration items, to which the
* caller must provide a valid pointer.
* Currently only supports querying the RX and TX hardware checksum
* capabilities of the specified device instance.
*
* @param dev Pointer to the device data
* @param type The hardware configuration item to be queried
* @param config Pointer to the struct into which the queried
* configuration data is written.
* @return 0 if the specified configuration item was successfully
* queried, -ENOTSUP if the specified configuration item
* is not supported by this function.
*/
static int eth_xlnx_gem_get_config(const struct device *dev,
enum ethernet_config_type type,
struct ethernet_config *config)
{
const struct eth_xlnx_gem_dev_cfg *dev_conf = dev->config;
switch (type) {
case ETHERNET_CONFIG_TYPE_RX_CHECKSUM_SUPPORT:
if (dev_conf->enable_rx_chksum_offload) {
config->chksum_support = ETHERNET_CHECKSUM_SUPPORT_IPV4_HEADER |
ETHERNET_CHECKSUM_SUPPORT_IPV6_HEADER |
ETHERNET_CHECKSUM_SUPPORT_TCP |
ETHERNET_CHECKSUM_SUPPORT_UDP;
} else {
config->chksum_support = ETHERNET_CHECKSUM_SUPPORT_NONE;
}
return 0;
case ETHERNET_CONFIG_TYPE_TX_CHECKSUM_SUPPORT:
if (dev_conf->enable_tx_chksum_offload) {
config->chksum_support = ETHERNET_CHECKSUM_SUPPORT_IPV4_HEADER |
ETHERNET_CHECKSUM_SUPPORT_IPV6_HEADER |
ETHERNET_CHECKSUM_SUPPORT_TCP |
ETHERNET_CHECKSUM_SUPPORT_UDP;
} else {
config->chksum_support = ETHERNET_CHECKSUM_SUPPORT_NONE;
}
return 0;
default:
return -ENOTSUP;
};
}
#ifdef CONFIG_NET_STATISTICS_ETHERNET #ifdef CONFIG_NET_STATISTICS_ETHERNET
/** /**
* @brief GEM statistics data request function * @brief GEM statistics data request function