RDMA/nes: Add wqm_quanta module option
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>
diff --git a/drivers/infiniband/hw/nes/nes.c b/drivers/infiniband/hw/nes/nes.c
index 30c93db..a2b04d6 100644
--- a/drivers/infiniband/hw/nes/nes.c
+++ b/drivers/infiniband/hw/nes/nes.c
@@ -91,6 +91,10 @@
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 @@
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 @@
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 @@
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 @@
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 @@
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);
}
/**