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RDMA/nes: Add wqm_quanta module option

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Add a module parameter wqm_quanta.  It controls the number of segments
transmitted at a time.

Signed-off-by: Sweta Bhatt <sweta.bhatt@einfochips.com>
Signed-off-by: Chien Tung <ctung@neteffect.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Chien Tung
2008-09-26 15:08:10 -05:00
committed by Roland Dreier
parent de182149c3
commit 2b537c2824
4 changed files with 63 additions and 2 deletions
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58
drivers/infiniband/hw/nes/nes.c
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@@ -91,6 +91,10 @@ unsigned int nes_debug_level = 0;
module_param_named(debug_level, nes_debug_level, uint, 0644);
MODULE_PARM_DESC(debug_level, "Enable debug output level");
unsigned int wqm_quanta = 0x10000;
module_param(wqm_quanta, int, 0644);
MODULE_PARM_DESC(wqm_quanta, "WQM quanta");
LIST_HEAD(nes_adapter_list);
static LIST_HEAD(nes_dev_list);
@@ -557,6 +561,7 @@ static int __devinit nes_probe(struct pci_dev *pcidev, const struct pci_device_i
goto bail5;
}
nesdev->nesadapter->et_rx_coalesce_usecs_irq = interrupt_mod_interval;
nesdev->nesadapter->wqm_quanta = wqm_quanta;
/* nesdev->base_doorbell_index =
nesdev->nesadapter->pd_config_base[PCI_FUNC(nesdev->pcidev->devfn)]; */
@@ -1069,6 +1074,55 @@ static ssize_t nes_store_idx_data(struct device_driver *ddp,
return strnlen(buf, count);
}
/**
* nes_show_wqm_quanta
*/
static ssize_t nes_show_wqm_quanta(struct device_driver *ddp, char *buf)
{
u32 wqm_quanta_value = 0xdead;
u32 i = 0;
struct nes_device *nesdev;
list_for_each_entry(nesdev, &nes_dev_list, list) {
if (i == ee_flsh_adapter) {
wqm_quanta_value = nesdev->nesadapter->wqm_quanta;
break;
}
i++;
}
return snprintf(buf, PAGE_SIZE, "0x%X\n", wqm_quanta);
}
/**
* nes_store_wqm_quanta
*/
static ssize_t nes_store_wqm_quanta(struct device_driver *ddp,
const char *buf, size_t count)
{
unsigned long wqm_quanta_value;
u32 wqm_config1;
u32 i = 0;
struct nes_device *nesdev;
strict_strtoul(buf, 0, &wqm_quanta_value);
list_for_each_entry(nesdev, &nes_dev_list, list) {
if (i == ee_flsh_adapter) {
nesdev->nesadapter->wqm_quanta = wqm_quanta_value;
wqm_config1 = nes_read_indexed(nesdev,
NES_IDX_WQM_CONFIG1);
nes_write_indexed(nesdev, NES_IDX_WQM_CONFIG1,
((wqm_quanta_value << 1) |
(wqm_config1 & 0x00000001)));
break;
}
i++;
}
return strnlen(buf, count);
}
static DRIVER_ATTR(adapter, S_IRUSR | S_IWUSR,
nes_show_adapter, nes_store_adapter);
static DRIVER_ATTR(eeprom_cmd, S_IRUSR | S_IWUSR,
@@ -1087,6 +1141,8 @@ static DRIVER_ATTR(idx_addr, S_IRUSR | S_IWUSR,
nes_show_idx_addr, nes_store_idx_addr);
static DRIVER_ATTR(idx_data, S_IRUSR | S_IWUSR,
nes_show_idx_data, nes_store_idx_data);
static DRIVER_ATTR(wqm_quanta, S_IRUSR | S_IWUSR,
nes_show_wqm_quanta, nes_store_wqm_quanta);
static int nes_create_driver_sysfs(struct pci_driver *drv)
{
@@ -1100,6 +1156,7 @@ static int nes_create_driver_sysfs(struct pci_driver *drv)
error |= driver_create_file(&drv->driver, &driver_attr_nonidx_data);
error |= driver_create_file(&drv->driver, &driver_attr_idx_addr);
error |= driver_create_file(&drv->driver, &driver_attr_idx_data);
error |= driver_create_file(&drv->driver, &driver_attr_wqm_quanta);
return error;
}
@@ -1114,6 +1171,7 @@ static void nes_remove_driver_sysfs(struct pci_driver *drv)
driver_remove_file(&drv->driver, &driver_attr_nonidx_data);
driver_remove_file(&drv->driver, &driver_attr_idx_addr);
driver_remove_file(&drv->driver, &driver_attr_idx_data);
driver_remove_file(&drv->driver, &driver_attr_wqm_quanta);
}
/**