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author | Arthur Kiyanovski <akiyano@amazon.com> | 2019-06-03 17:43:20 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2019-06-03 13:30:38 -0700 |
commit | 315c28d2b714f2c52c0b22f38dbf9b44f8f0c9e4 (patch) | |
tree | 71fc8dceadab619673c43fe36d2d9cc32194bc83 /drivers/net/ethernet/amazon/ena/ena_com.c | |
parent | net: ena: add handling of llq max tx burst size (diff) | |
download | linux-dev-315c28d2b714f2c52c0b22f38dbf9b44f8f0c9e4.tar.xz linux-dev-315c28d2b714f2c52c0b22f38dbf9b44f8f0c9e4.zip |
net: ena: ethtool: add extra properties retrieval via get_priv_flags
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>
Diffstat (limited to 'drivers/net/ethernet/amazon/ena/ena_com.c')
-rw-r--r-- | drivers/net/ethernet/amazon/ena/ena_com.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/net/ethernet/amazon/ena/ena_com.c b/drivers/net/ethernet/amazon/ena/ena_com.c index bd0d785b211e..935e8fa8d757 100644 --- a/drivers/net/ethernet/amazon/ena/ena_com.c +++ b/drivers/net/ethernet/amazon/ena/ena_com.c @@ -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) { |