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RDMA/i40iw: Add virtual channel message queue 

Queue users of virtual channel on a waitqueue until the channel is
clear instead of failing the call when the channel is occupied.

Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Ismail, Mustafa 2016-04-18 10:33:03 -05:00 коммит произвёл Doug Ledford
Родитель f606d89330
Коммит f69c333162
6 изменённых файлов: 103 добавлений и 63 удалений
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47
drivers/infiniband/hw/i40iw/i40iw_main.c
Просмотреть файл

@ -1528,7 +1528,10 @@ static enum i40iw_status_code i40iw_setup_init_state(struct i40iw_handler *hdl,
goto exit;
iwdev->obj_next = iwdev->obj_mem;
iwdev->push_mode = push_mode;
init_waitqueue_head(&iwdev->vchnl_waitq);
init_waitqueue_head(&dev->vf_reqs);
status = i40iw_initialize_dev(iwdev, ldev);
exit:
if (status) {
@ -1707,7 +1710,6 @@ static void i40iw_vf_reset(struct i40e_info *ldev, struct i40e_client *client, u
for (i = 0; i < I40IW_MAX_PE_ENABLED_VF_COUNT; i++) {
if (!dev->vf_dev[i] || (dev->vf_dev[i]->vf_id != vf_id))
continue;
/* free all resources allocated on behalf of vf */
tmp_vfdev = dev->vf_dev[i];
spin_lock_irqsave(&dev->dev_pestat.stats_lock, flags);
@ -1816,8 +1818,6 @@ static int i40iw_virtchnl_receive(struct i40e_info *ldev,
dev = &hdl->device.sc_dev;
iwdev = dev->back_dev;
i40iw_debug(dev, I40IW_DEBUG_VIRT, "msg %p, message length %u\n", msg, len);
if (dev->vchnl_if.vchnl_recv) {
ret_code = dev->vchnl_if.vchnl_recv(dev, vf_id, msg, len);
if (!dev->is_pf) {
@ -1828,6 +1828,39 @@ static int i40iw_virtchnl_receive(struct i40e_info *ldev,
return ret_code;
}
/**
* i40iw_vf_clear_to_send - wait to send virtual channel message
* @dev: iwarp device *
* Wait for until virtual channel is clear
* before sending the next message
*
* Returns false if error
* Returns true if clear to send
*/
bool i40iw_vf_clear_to_send(struct i40iw_sc_dev *dev)
{
struct i40iw_device *iwdev;
wait_queue_t wait;
iwdev = dev->back_dev;
if (!wq_has_sleeper(&dev->vf_reqs) &&
(atomic_read(&iwdev->vchnl_msgs) == 0))
return true; /* virtual channel is clear */
init_wait(&wait);
add_wait_queue_exclusive(&dev->vf_reqs, &wait);
if (!wait_event_timeout(dev->vf_reqs,
(atomic_read(&iwdev->vchnl_msgs) == 0),
I40IW_VCHNL_EVENT_TIMEOUT))
dev->vchnl_up = false;
remove_wait_queue(&dev->vf_reqs, &wait);
return dev->vchnl_up;
}
/**
* i40iw_virtchnl_send - send a message through the virtual channel
* @dev: iwarp device
@ -1845,18 +1878,16 @@ static enum i40iw_status_code i40iw_virtchnl_send(struct i40iw_sc_dev *dev,
{
struct i40iw_device *iwdev;
struct i40e_info *ldev;
enum i40iw_status_code ret_code = I40IW_ERR_BAD_PTR;
if (!dev || !dev->back_dev)
return ret_code;
return I40IW_ERR_BAD_PTR;
iwdev = dev->back_dev;
ldev = iwdev->ldev;
if (ldev && ldev->ops && ldev->ops->virtchnl_send)
ret_code = ldev->ops->virtchnl_send(ldev, &i40iw_client, vf_id, msg, len);
return ret_code;
return ldev->ops->virtchnl_send(ldev, &i40iw_client, vf_id, msg, len);
return I40IW_ERR_BAD_PTR;
}
/* client interface functions */

1
drivers/infiniband/hw/i40iw/i40iw_osdep.h
Просмотреть файл

@ -172,6 +172,7 @@ struct i40iw_hw;
u8 __iomem *i40iw_get_hw_addr(void *dev);
void i40iw_ieq_mpa_crc_ae(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp);
enum i40iw_status_code i40iw_vf_wait_vchnl_resp(struct i40iw_sc_dev *dev);
bool i40iw_vf_clear_to_send(struct i40iw_sc_dev *dev);
enum i40iw_status_code i40iw_ieq_check_mpacrc(struct shash_desc *desc, void *addr,
u32 length, u32 value);
struct i40iw_sc_qp *i40iw_ieq_get_qp(struct i40iw_sc_dev *dev, struct i40iw_puda_buf *buf);

3
drivers/infiniband/hw/i40iw/i40iw_type.h
Просмотреть файл

@ -483,12 +483,13 @@ struct i40iw_sc_dev {
struct i40iw_hmc_fpm_misc hmc_fpm_misc;
u16 qs_handle;
u32 debug_mask;
u32 debug_mask;
u16 exception_lan_queue;
u8 hmc_fn_id;
bool is_pf;
bool vchnl_up;
u8 vf_id;
wait_queue_head_t vf_reqs;
u64 cqp_cmd_stats[OP_SIZE_CQP_STAT_ARRAY];
struct i40iw_vchnl_vf_msg_buffer vchnl_vf_msg_buf;
u8 hw_rev;

11
drivers/infiniband/hw/i40iw/i40iw_utils.c
Просмотреть файл

@ -990,21 +990,24 @@ enum i40iw_status_code i40iw_cqp_commit_fpm_values_cmd(struct i40iw_sc_dev *dev,
enum i40iw_status_code i40iw_vf_wait_vchnl_resp(struct i40iw_sc_dev *dev)
{
struct i40iw_device *iwdev = dev->back_dev;
enum i40iw_status_code err_code = 0;
int timeout_ret;
i40iw_debug(dev, I40IW_DEBUG_VIRT, "%s[%u] dev %p, iwdev %p\n",
__func__, __LINE__, dev, iwdev);
atomic_add(2, &iwdev->vchnl_msgs);
atomic_set(&iwdev->vchnl_msgs, 2);
timeout_ret = wait_event_timeout(iwdev->vchnl_waitq,
(atomic_read(&iwdev->vchnl_msgs) == 1),
I40IW_VCHNL_EVENT_TIMEOUT);
atomic_dec(&iwdev->vchnl_msgs);
if (!timeout_ret) {
i40iw_pr_err("virt channel completion timeout = 0x%x\n", timeout_ret);
err_code = I40IW_ERR_TIMEOUT;
atomic_set(&iwdev->vchnl_msgs, 0);
dev->vchnl_up = false;
return I40IW_ERR_TIMEOUT;
}
return err_code;
wake_up(&dev->vf_reqs);
return 0;
}
/**

8
drivers/infiniband/hw/i40iw/i40iw_verbs.c
Просмотреть файл

@ -2148,7 +2148,6 @@ static int i40iw_get_protocol_stats(struct ib_device *ibdev,
struct i40iw_dev_hw_stats *hw_stats = &devstat->hw_stats;
struct timespec curr_time;
static struct timespec last_rd_time = {0, 0};
enum i40iw_status_code status = 0;
unsigned long flags;
curr_time = current_kernel_time();
@ -2161,11 +2160,8 @@ static int i40iw_get_protocol_stats(struct ib_device *ibdev,
spin_unlock_irqrestore(&devstat->stats_lock, flags);
} else {
if (((u64)curr_time.tv_sec - (u64)last_rd_time.tv_sec) > 1)
status = i40iw_vchnl_vf_get_pe_stats(dev,
&devstat->hw_stats);
if (status)
return -ENOSYS;
if (i40iw_vchnl_vf_get_pe_stats(dev, &devstat->hw_stats))
return -ENOSYS;
}
stats->iw.ipInReceives = hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP4RXPKTS] +

96
drivers/infiniband/hw/i40iw/i40iw_virtchnl.c
Просмотреть файл

@ -437,11 +437,9 @@ enum i40iw_status_code i40iw_vchnl_recv_pf(struct i40iw_sc_dev *dev,
vchnl_pf_send_get_ver_resp(dev, vf_id, vchnl_msg);
return I40IW_SUCCESS;
}
for (iw_vf_idx = 0; iw_vf_idx < I40IW_MAX_PE_ENABLED_VF_COUNT;
iw_vf_idx++) {
for (iw_vf_idx = 0; iw_vf_idx < I40IW_MAX_PE_ENABLED_VF_COUNT; iw_vf_idx++) {
if (!dev->vf_dev[iw_vf_idx]) {
if (first_avail_iw_vf ==
I40IW_MAX_PE_ENABLED_VF_COUNT)
if (first_avail_iw_vf == I40IW_MAX_PE_ENABLED_VF_COUNT)
first_avail_iw_vf = iw_vf_idx;
continue;
}
@ -596,23 +594,25 @@ enum i40iw_status_code i40iw_vchnl_vf_get_ver(struct i40iw_sc_dev *dev,
struct i40iw_virtchnl_req vchnl_req;
enum i40iw_status_code ret_code;
if (!i40iw_vf_clear_to_send(dev))
return I40IW_ERR_TIMEOUT;
memset(&vchnl_req, 0, sizeof(vchnl_req));
vchnl_req.dev = dev;
vchnl_req.parm = vchnl_ver;
vchnl_req.parm_len = sizeof(*vchnl_ver);
vchnl_req.vchnl_msg = &dev->vchnl_vf_msg_buf.vchnl_msg;
ret_code = vchnl_vf_send_get_ver_req(dev, &vchnl_req);
if (!ret_code) {
ret_code = i40iw_vf_wait_vchnl_resp(dev);
if (!ret_code)
ret_code = vchnl_req.ret_code;
else
dev->vchnl_up = false;
} else {
if (ret_code) {
i40iw_debug(dev, I40IW_DEBUG_VIRT,
"%s Send message failed 0x%0x\n", __func__, ret_code);
return ret_code;
}
return ret_code;
ret_code = i40iw_vf_wait_vchnl_resp(dev);
if (ret_code)
return ret_code;
else
return vchnl_req.ret_code;
}
/**
@ -626,23 +626,25 @@ enum i40iw_status_code i40iw_vchnl_vf_get_hmc_fcn(struct i40iw_sc_dev *dev,
struct i40iw_virtchnl_req vchnl_req;
enum i40iw_status_code ret_code;
if (!i40iw_vf_clear_to_send(dev))
return I40IW_ERR_TIMEOUT;
memset(&vchnl_req, 0, sizeof(vchnl_req));
vchnl_req.dev = dev;
vchnl_req.parm = hmc_fcn;
vchnl_req.parm_len = sizeof(*hmc_fcn);
vchnl_req.vchnl_msg = &dev->vchnl_vf_msg_buf.vchnl_msg;
ret_code = vchnl_vf_send_get_hmc_fcn_req(dev, &vchnl_req);
if (!ret_code) {
ret_code = i40iw_vf_wait_vchnl_resp(dev);
if (!ret_code)
ret_code = vchnl_req.ret_code;
else
dev->vchnl_up = false;
} else {
if (ret_code) {
i40iw_debug(dev, I40IW_DEBUG_VIRT,
"%s Send message failed 0x%0x\n", __func__, ret_code);
return ret_code;
}
return ret_code;
ret_code = i40iw_vf_wait_vchnl_resp(dev);
if (ret_code)
return ret_code;
else
return vchnl_req.ret_code;
}
/**
@ -660,25 +662,27 @@ enum i40iw_status_code i40iw_vchnl_vf_add_hmc_objs(struct i40iw_sc_dev *dev,
struct i40iw_virtchnl_req vchnl_req;
enum i40iw_status_code ret_code;
if (!i40iw_vf_clear_to_send(dev))
return I40IW_ERR_TIMEOUT;
memset(&vchnl_req, 0, sizeof(vchnl_req));
vchnl_req.dev = dev;
vchnl_req.vchnl_msg = &dev->vchnl_vf_msg_buf.vchnl_msg;
ret_code = vchnl_vf_send_add_hmc_objs_req(dev,
&vchnl_req,
rsrc_type,
start_index,
rsrc_count);
if (!ret_code) {
ret_code = i40iw_vf_wait_vchnl_resp(dev);
if (!ret_code)
ret_code = vchnl_req.ret_code;
else
dev->vchnl_up = false;
} else {
if (ret_code) {
i40iw_debug(dev, I40IW_DEBUG_VIRT,
"%s Send message failed 0x%0x\n", __func__, ret_code);
return ret_code;
}
return ret_code;
ret_code = i40iw_vf_wait_vchnl_resp(dev);
if (ret_code)
return ret_code;
else
return vchnl_req.ret_code;
}
/**
@ -696,25 +700,27 @@ enum i40iw_status_code i40iw_vchnl_vf_del_hmc_obj(struct i40iw_sc_dev *dev,
struct i40iw_virtchnl_req vchnl_req;
enum i40iw_status_code ret_code;
if (!i40iw_vf_clear_to_send(dev))
return I40IW_ERR_TIMEOUT;
memset(&vchnl_req, 0, sizeof(vchnl_req));
vchnl_req.dev = dev;
vchnl_req.vchnl_msg = &dev->vchnl_vf_msg_buf.vchnl_msg;
ret_code = vchnl_vf_send_del_hmc_objs_req(dev,
&vchnl_req,
rsrc_type,
start_index,
rsrc_count);
if (!ret_code) {
ret_code = i40iw_vf_wait_vchnl_resp(dev);
if (!ret_code)
ret_code = vchnl_req.ret_code;
else
dev->vchnl_up = false;
} else {
if (ret_code) {
i40iw_debug(dev, I40IW_DEBUG_VIRT,
"%s Send message failed 0x%0x\n", __func__, ret_code);
return ret_code;
}
return ret_code;
ret_code = i40iw_vf_wait_vchnl_resp(dev);
if (ret_code)
return ret_code;
else
return vchnl_req.ret_code;
}
/**
@ -728,21 +734,23 @@ enum i40iw_status_code i40iw_vchnl_vf_get_pe_stats(struct i40iw_sc_dev *dev,
struct i40iw_virtchnl_req vchnl_req;
enum i40iw_status_code ret_code;
if (!i40iw_vf_clear_to_send(dev))
return I40IW_ERR_TIMEOUT;
memset(&vchnl_req, 0, sizeof(vchnl_req));
vchnl_req.dev = dev;
vchnl_req.parm = hw_stats;
vchnl_req.parm_len = sizeof(*hw_stats);
vchnl_req.vchnl_msg = &dev->vchnl_vf_msg_buf.vchnl_msg;
ret_code = vchnl_vf_send_get_pe_stats_req(dev, &vchnl_req);
if (!ret_code) {
ret_code = i40iw_vf_wait_vchnl_resp(dev);
if (!ret_code)
ret_code = vchnl_req.ret_code;
else
dev->vchnl_up = false;
} else {
if (ret_code) {
i40iw_debug(dev, I40IW_DEBUG_VIRT,
"%s Send message failed 0x%0x\n", __func__, ret_code);
return ret_code;
}
return ret_code;
ret_code = i40iw_vf_wait_vchnl_resp(dev);
if (ret_code)
return ret_code;
else
return vchnl_req.ret_code;
}