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net/ice/base: support not locking sideband queue

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For certain PTP clock adjustments, there is a use case for locking the
sideband queue at a higher level and performing an atomic series of
operations while the sideband queue is locked.  To accommodate this use
case, split ice_sw_send_cmd() into a version that takes the lock and a
version that does not.

Signed-off-by: Ben Shelton <benjamin.h.shelton@intel.com>
Signed-off-by: Paul M Stillwell Jr <paul.m.stillwell.jr@intel.com>
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Acked-by: Xiaolong Ye <xiaolong.ye@intel.com>
This commit is contained in:
Qi Zhang 2019-08-29 10:36:29 +08:00 committed by Ferruh Yigit
parent d1880ece7d
commit 54f75a4ce2
1 changed files with 34 additions and 6 deletions
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40
drivers/net/ice/base/ice_controlq.c
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@ -859,7 +859,7 @@ static bool ice_sq_done(struct ice_hw *hw, struct ice_ctl_q_info *cq)
}
/**
* ice_sq_send_cmd - send command to Control Queue (ATQ)
* ice_sq_send_cmd_nolock - send command to Control Queue (ATQ)
* @hw: pointer to the HW struct
* @cq: pointer to the specific Control queue
* @desc: prefilled descriptor describing the command (non DMA mem)
@ -870,10 +870,10 @@ static bool ice_sq_done(struct ice_hw *hw, struct ice_ctl_q_info *cq)
* This is the main send command routine for the ATQ. It runs the queue,
* cleans the queue, etc.
*/
enum ice_status
ice_sq_send_cmd(struct ice_hw *hw, struct ice_ctl_q_info *cq,
struct ice_aq_desc *desc, void *buf, u16 buf_size,
struct ice_sq_cd *cd)
static enum ice_status
ice_sq_send_cmd_nolock(struct ice_hw *hw, struct ice_ctl_q_info *cq,
struct ice_aq_desc *desc, void *buf, u16 buf_size,
struct ice_sq_cd *cd)
{
struct ice_dma_mem *dma_buf = NULL;
struct ice_aq_desc *desc_on_ring;
@ -887,7 +887,6 @@ ice_sq_send_cmd(struct ice_hw *hw, struct ice_ctl_q_info *cq,
/* if reset is in progress return a soft error */
if (hw->reset_ongoing)
return ICE_ERR_RESET_ONGOING;
ice_acquire_lock(&cq->sq_lock);
cq->sq_last_status = ICE_AQ_RC_OK;
@ -1040,7 +1039,36 @@ ice_sq_send_cmd(struct ice_hw *hw, struct ice_ctl_q_info *cq,
}
sq_send_command_error:
return status;
}
/**
* ice_sq_send_cmd - send command to Control Queue (ATQ)
* @hw: pointer to the HW struct
* @cq: pointer to the specific Control queue
* @desc: prefilled descriptor describing the command (non DMA mem)
* @buf: buffer to use for indirect commands (or NULL for direct commands)
* @buf_size: size of buffer for indirect commands (or 0 for direct commands)
* @cd: pointer to command details structure
*
* This is the main send command routine for the ATQ. It runs the queue,
* cleans the queue, etc.
*/
enum ice_status
ice_sq_send_cmd(struct ice_hw *hw, struct ice_ctl_q_info *cq,
struct ice_aq_desc *desc, void *buf, u16 buf_size,
struct ice_sq_cd *cd)
{
enum ice_status status = ICE_SUCCESS;
/* if reset is in progress return a soft error */
if (hw->reset_ongoing)
return ICE_ERR_RESET_ONGOING;
ice_acquire_lock(&cq->sq_lock);
status = ice_sq_send_cmd_nolock(hw, cq, desc, buf, buf_size, cd);
ice_release_lock(&cq->sq_lock);
return status;
}