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[PATCH] S2io: Support for bimodal interrupts

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Hi,
This is a patch to provide bimodal interrupt moderation support for
Xframe II adapter. Basically, in this moderation scheme, the adapter
raises a traffic interrupt if the no. of packets transmitted and/or
received reaches a programmable threshold.

Signed-off-by: Ravinandan Arakali <ravinandan.arakali@neterion.com>
Signed-off-by: Raghavendra Koushik <raghavendra.koushik@neterion.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
raghavendra.koushik@neterion.com 2005-08-03 12:38:01 -07:00 committed by Jeff Garzik
parent 541ae68f6d
commit b6e3f9828b
2 changed files with 87 additions and 42 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

48
drivers/net/s2io.c
View file

@ -297,6 +297,7 @@ static unsigned int mc_pause_threshold_q4q7 = 187;
static unsigned int shared_splits;
static unsigned int tmac_util_period = 5;
static unsigned int rmac_util_period = 5;
static unsigned int bimodal = 0;
#ifndef CONFIG_S2IO_NAPI
static unsigned int indicate_max_pkts;
#endif
@ -1306,6 +1307,36 @@ static int init_nic(struct s2io_nic *nic)
time++;
}
if (nic->config.bimodal) {
int k = 0;
for (k = 0; k < config->rx_ring_num; k++) {
val64 = TTI_CMD_MEM_WE | TTI_CMD_MEM_STROBE_NEW_CMD;
val64 |= TTI_CMD_MEM_OFFSET(0x38+k);
writeq(val64, &bar0->tti_command_mem);
/*
* Once the operation completes, the Strobe bit of the command
* register will be reset. We poll for this particular condition
* We wait for a maximum of 500ms for the operation to complete,
* if it's not complete by then we return error.
*/
time = 0;
while (TRUE) {
val64 = readq(&bar0->tti_command_mem);
if (!(val64 & TTI_CMD_MEM_STROBE_NEW_CMD)) {
break;
}
if (time > 10) {
DBG_PRINT(ERR_DBG,
"%s: TTI init Failed\n",
dev->name);
return -1;
}
time++;
msleep(50);
}
}
} else {
/* RTI Initialization */
if (nic->device_type == XFRAME_II_DEVICE) {
@ -1329,7 +1360,9 @@ static int init_nic(struct s2io_nic *nic)
RTI_DATA2_MEM_RX_UFC_C(0x40) | RTI_DATA2_MEM_RX_UFC_D(0x80);
writeq(val64, &bar0->rti_data2_mem);
val64 = RTI_CMD_MEM_WE | RTI_CMD_MEM_STROBE_NEW_CMD;
for (i = 0; i < config->rx_ring_num; i++) {
val64 = RTI_CMD_MEM_WE | RTI_CMD_MEM_STROBE_NEW_CMD
| RTI_CMD_MEM_OFFSET(i);
writeq(val64, &bar0->rti_command_mem);
/*
@ -1353,6 +1386,8 @@ static int init_nic(struct s2io_nic *nic)
time++;
msleep(50);
}
}
}
/*
* Initializing proper values as Pause threshold into all
@ -1789,6 +1824,8 @@ static int start_nic(struct s2io_nic *nic)
&bar0->prc_rxd0_n[i]);
val64 = readq(&bar0->prc_ctrl_n[i]);
if (nic->config.bimodal)
val64 |= PRC_CTRL_BIMODAL_INTERRUPT;
#ifndef CONFIG_2BUFF_MODE
val64 |= PRC_CTRL_RC_ENABLED;
#else
@ -5030,6 +5067,7 @@ module_param(mc_pause_threshold_q4q7, int, 0);
module_param(shared_splits, int, 0);
module_param(tmac_util_period, int, 0);
module_param(rmac_util_period, int, 0);
module_param(bimodal, bool, 0);
#ifndef CONFIG_S2IO_NAPI
module_param(indicate_max_pkts, int, 0);
#endif
@ -5397,6 +5435,14 @@ s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre)
else
strcat(sp->name, ": Neterion Xframe I 10GbE adapter");
/* Initialize bimodal Interrupts */
sp->config.bimodal = bimodal;
if (!(sp->device_type & XFRAME_II_DEVICE) && bimodal) {
sp->config.bimodal = 0;
DBG_PRINT(ERR_DBG,"%s:Bimodal intr not supported by Xframe I\n",
dev->name);
}
/*
* Make Link state as off at this point, when the Link change
* interrupt comes the state will be automatically changed to

3
drivers/net/s2io.h
View file

@ -261,8 +261,6 @@ typedef struct stat_block {
u32 rmac_accepted_ip_oflow;
u32 reserved_14;
u32 link_fault_cnt;
/* Software statistics maintained by driver */
swStat_t sw_stat;
} StatInfo_t;
@ -349,6 +347,7 @@ struct config_param {
#define MAX_RX_BLOCKS_PER_RING 150
rx_ring_config_t rx_cfg[MAX_RX_RINGS]; /*Per-Rx Ring config */
u8 bimodal; /*Flag for setting bimodal interrupts*/
#define HEADER_ETHERNET_II_802_3_SIZE 14
#define HEADER_802_2_SIZE 3