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net: ena: add intr_moder_rx_interval to struct ena_com_dev and use it

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Add intr_moder_rx_interval to struct ena_com_dev and use it as the
location where the interrupt moderation rx interval is saved, instead
of the interrupt moderation table.

This is done as a first step before removing the old interrupt moderation
code.

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arthur Kiyanovski 2019-09-16 14:31:26 +03:00 committed by David S. Miller
parent 1b8da10370
commit 15619e722b
3 changed files with 13 additions and 18 deletions
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20
drivers/net/ethernet/amazon/ena/ena_com.c
View File

@ -1297,9 +1297,6 @@ static int ena_com_init_interrupt_moderation_table(struct ena_com_dev *ena_dev)
static void ena_com_update_intr_delay_resolution(struct ena_com_dev *ena_dev,
u16 intr_delay_resolution)
{
struct ena_intr_moder_entry *intr_moder_tbl = ena_dev->intr_moder_tbl;
unsigned int i;
if (!intr_delay_resolution) {
pr_err("Illegal intr_delay_resolution provided. Going to use default 1 usec resolution\n");
intr_delay_resolution = 1;
@ -1307,8 +1304,7 @@ static void ena_com_update_intr_delay_resolution(struct ena_com_dev *ena_dev,
ena_dev->intr_delay_resolution = intr_delay_resolution;
/* update Rx */
for (i = 0; i < ENA_INTR_MAX_NUM_OF_LEVELS; i++)
intr_moder_tbl[i].intr_moder_interval /= intr_delay_resolution;
ena_dev->intr_moder_rx_interval /= intr_delay_resolution;
/* update Tx */
ena_dev->intr_moder_tx_interval /= intr_delay_resolution;
@ -2798,11 +2794,8 @@ int ena_com_update_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_de
return -EFAULT;
}
/* We use LOWEST entry of moderation table for storing
* nonadaptive interrupt coalescing values
*/
ena_dev->intr_moder_tbl[ENA_INTR_MODER_LOWEST].intr_moder_interval =
rx_coalesce_usecs / ena_dev->intr_delay_resolution;
ena_dev->intr_moder_rx_interval = rx_coalesce_usecs /
ena_dev->intr_delay_resolution;
return 0;
}
@ -2907,12 +2900,7 @@ unsigned int ena_com_get_nonadaptive_moderation_interval_tx(struct ena_com_dev *
unsigned int ena_com_get_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev)
{
struct ena_intr_moder_entry *intr_moder_tbl = ena_dev->intr_moder_tbl;
if (intr_moder_tbl)
return intr_moder_tbl[ENA_INTR_MODER_LOWEST].intr_moder_interval;
return 0;
return ena_dev->intr_moder_rx_interval;
}
void ena_com_init_intr_moderation_entry(struct ena_com_dev *ena_dev,

8
drivers/net/ethernet/amazon/ena/ena_com.h
View File

@ -93,7 +93,7 @@
#define ENA_INTR_HIGHEST_BYTES (192 * 1024)
#define ENA_INTR_INITIAL_TX_INTERVAL_USECS 196
#define ENA_INTR_INITIAL_RX_INTERVAL_USECS 4
#define ENA_INTR_INITIAL_RX_INTERVAL_USECS 0
#define ENA_INTR_DELAY_OLD_VALUE_WEIGHT 6
#define ENA_INTR_DELAY_NEW_VALUE_WEIGHT 4
#define ENA_INTR_MODER_LEVEL_STRIDE 2
@ -376,7 +376,13 @@ struct ena_com_dev {
struct ena_host_attribute host_attr;
bool adaptive_coalescing;
u16 intr_delay_resolution;
/* interrupt moderation intervals are in usec divided by
* intr_delay_resolution, which is supplied by the device.
*/
u32 intr_moder_tx_interval;
u32 intr_moder_rx_interval;
struct ena_intr_moder_entry *intr_moder_tbl;
struct ena_com_llq_info llq_info;

3
drivers/net/ethernet/amazon/ena/ena_netdev.c
View File

@ -3485,10 +3485,11 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
calc_queue_ctx.get_feat_ctx = &get_feat_ctx;
calc_queue_ctx.pdev = pdev;
/* initial Tx interrupt delay, Assumes 1 usec granularity.
/* Initial Tx and RX interrupt delay. Assumes 1 usec granularity.
* Updated during device initialization with the real granularity
*/
ena_dev->intr_moder_tx_interval = ENA_INTR_INITIAL_TX_INTERVAL_USECS;
ena_dev->intr_moder_rx_interval = ENA_INTR_INITIAL_RX_INTERVAL_USECS;
io_queue_num = ena_calc_io_queue_num(pdev, ena_dev, &get_feat_ctx);
rc = ena_calc_queue_size(&calc_queue_ctx);
if (rc || io_queue_num <= 0) {