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Message-ID: <20231026083852.2623216-1-ivecera@redhat.com>
Date: Thu, 26 Oct 2023 10:38:52 +0200
From: Ivan Vecera <ivecera@...hat.com>
To: netdev@...r.kernel.org
Cc: Jesse Brandeburg <jesse.brandeburg@...el.com>,
Tony Nguyen <anthony.l.nguyen@...el.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
intel-wired-lan@...ts.osuosl.org,
linux-kernel@...r.kernel.org,
Jacob Keller <jacob.e.keller@...el.com>,
Wojciech Drewek <wojciech.drewek@...el.com>
Subject: [PATCH iwl-next] i40e: Remove queue tracking fields from i40e_adminq_ring
Fields 'head', 'tail', 'len', 'bah' and 'bal' in i40e_adminq_ring
are used to store register offsets. These offsets are initialized
and remains constant so there is no need to store them in the
i40e_adminq_ring structure.
Remove these fields from i40e_adminq_ring and use register offset
constants instead. Remove i40e_adminq_init_regs() that originally
stores these constants into these fields.
Finally improve i40e_check_asq_alive() that assumes that
non-zero value of hw->aq.asq.len indicates fully initialized
AdminQ send queue. Replace it by check for non-zero value
of field hw->aq.asq.count that is non-zero when the sending
queue is initialized and is zeroed during shutdown of
the queue.
Signed-off-by: Ivan Vecera <ivecera@...hat.com>
---
drivers/net/ethernet/intel/i40e/i40e_adminq.c | 86 +++++++------------
drivers/net/ethernet/intel/i40e/i40e_adminq.h | 7 --
drivers/net/ethernet/intel/i40e/i40e_common.c | 8 +-
drivers/net/ethernet/intel/i40e/i40e_main.c | 8 +-
4 files changed, 39 insertions(+), 70 deletions(-)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_adminq.c b/drivers/net/ethernet/intel/i40e/i40e_adminq.c
index 896c43905309..f73f5930fc58 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_adminq.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_adminq.c
@@ -8,27 +8,6 @@
static void i40e_resume_aq(struct i40e_hw *hw);
-/**
- * i40e_adminq_init_regs - Initialize AdminQ registers
- * @hw: pointer to the hardware structure
- *
- * This assumes the alloc_asq and alloc_arq functions have already been called
- **/
-static void i40e_adminq_init_regs(struct i40e_hw *hw)
-{
- /* set head and tail registers in our local struct */
- hw->aq.asq.tail = I40E_PF_ATQT;
- hw->aq.asq.head = I40E_PF_ATQH;
- hw->aq.asq.len = I40E_PF_ATQLEN;
- hw->aq.asq.bal = I40E_PF_ATQBAL;
- hw->aq.asq.bah = I40E_PF_ATQBAH;
- hw->aq.arq.tail = I40E_PF_ARQT;
- hw->aq.arq.head = I40E_PF_ARQH;
- hw->aq.arq.len = I40E_PF_ARQLEN;
- hw->aq.arq.bal = I40E_PF_ARQBAL;
- hw->aq.arq.bah = I40E_PF_ARQBAH;
-}
-
/**
* i40e_alloc_adminq_asq_ring - Allocate Admin Queue send rings
* @hw: pointer to the hardware structure
@@ -254,17 +233,17 @@ static int i40e_config_asq_regs(struct i40e_hw *hw)
u32 reg = 0;
/* Clear Head and Tail */
- wr32(hw, hw->aq.asq.head, 0);
- wr32(hw, hw->aq.asq.tail, 0);
+ wr32(hw, I40E_PF_ATQH, 0);
+ wr32(hw, I40E_PF_ATQT, 0);
/* set starting point */
- wr32(hw, hw->aq.asq.len, (hw->aq.num_asq_entries |
+ wr32(hw, I40E_PF_ATQLEN, (hw->aq.num_asq_entries |
I40E_PF_ATQLEN_ATQENABLE_MASK));
- wr32(hw, hw->aq.asq.bal, lower_32_bits(hw->aq.asq.desc_buf.pa));
- wr32(hw, hw->aq.asq.bah, upper_32_bits(hw->aq.asq.desc_buf.pa));
+ wr32(hw, I40E_PF_ATQBAL, lower_32_bits(hw->aq.asq.desc_buf.pa));
+ wr32(hw, I40E_PF_ATQBAH, upper_32_bits(hw->aq.asq.desc_buf.pa));
/* Check one register to verify that config was applied */
- reg = rd32(hw, hw->aq.asq.bal);
+ reg = rd32(hw, I40E_PF_ATQBAL);
if (reg != lower_32_bits(hw->aq.asq.desc_buf.pa))
ret_code = -EIO;
@@ -283,20 +262,20 @@ static int i40e_config_arq_regs(struct i40e_hw *hw)
u32 reg = 0;
/* Clear Head and Tail */
- wr32(hw, hw->aq.arq.head, 0);
- wr32(hw, hw->aq.arq.tail, 0);
+ wr32(hw, I40E_PF_ARQH, 0);
+ wr32(hw, I40E_PF_ARQT, 0);
/* set starting point */
- wr32(hw, hw->aq.arq.len, (hw->aq.num_arq_entries |
+ wr32(hw, I40E_PF_ARQLEN, (hw->aq.num_arq_entries |
I40E_PF_ARQLEN_ARQENABLE_MASK));
- wr32(hw, hw->aq.arq.bal, lower_32_bits(hw->aq.arq.desc_buf.pa));
- wr32(hw, hw->aq.arq.bah, upper_32_bits(hw->aq.arq.desc_buf.pa));
+ wr32(hw, I40E_PF_ARQBAL, lower_32_bits(hw->aq.arq.desc_buf.pa));
+ wr32(hw, I40E_PF_ARQBAH, upper_32_bits(hw->aq.arq.desc_buf.pa));
/* Update tail in the HW to post pre-allocated buffers */
- wr32(hw, hw->aq.arq.tail, hw->aq.num_arq_entries - 1);
+ wr32(hw, I40E_PF_ARQT, hw->aq.num_arq_entries - 1);
/* Check one register to verify that config was applied */
- reg = rd32(hw, hw->aq.arq.bal);
+ reg = rd32(hw, I40E_PF_ARQBAL);
if (reg != lower_32_bits(hw->aq.arq.desc_buf.pa))
ret_code = -EIO;
@@ -439,11 +418,11 @@ static int i40e_shutdown_asq(struct i40e_hw *hw)
}
/* Stop firmware AdminQ processing */
- wr32(hw, hw->aq.asq.head, 0);
- wr32(hw, hw->aq.asq.tail, 0);
- wr32(hw, hw->aq.asq.len, 0);
- wr32(hw, hw->aq.asq.bal, 0);
- wr32(hw, hw->aq.asq.bah, 0);
+ wr32(hw, I40E_PF_ATQH, 0);
+ wr32(hw, I40E_PF_ATQT, 0);
+ wr32(hw, I40E_PF_ATQLEN, 0);
+ wr32(hw, I40E_PF_ATQBAL, 0);
+ wr32(hw, I40E_PF_ATQBAH, 0);
hw->aq.asq.count = 0; /* to indicate uninitialized queue */
@@ -473,11 +452,11 @@ static int i40e_shutdown_arq(struct i40e_hw *hw)
}
/* Stop firmware AdminQ processing */
- wr32(hw, hw->aq.arq.head, 0);
- wr32(hw, hw->aq.arq.tail, 0);
- wr32(hw, hw->aq.arq.len, 0);
- wr32(hw, hw->aq.arq.bal, 0);
- wr32(hw, hw->aq.arq.bah, 0);
+ wr32(hw, I40E_PF_ARQH, 0);
+ wr32(hw, I40E_PF_ARQT, 0);
+ wr32(hw, I40E_PF_ARQLEN, 0);
+ wr32(hw, I40E_PF_ARQBAL, 0);
+ wr32(hw, I40E_PF_ARQBAH, 0);
hw->aq.arq.count = 0; /* to indicate uninitialized queue */
@@ -608,9 +587,6 @@ int i40e_init_adminq(struct i40e_hw *hw)
goto init_adminq_exit;
}
- /* Set up register offsets */
- i40e_adminq_init_regs(hw);
-
/* setup ASQ command write back timeout */
hw->aq.asq_cmd_timeout = I40E_ASQ_CMD_TIMEOUT;
@@ -720,9 +696,9 @@ static u16 i40e_clean_asq(struct i40e_hw *hw)
desc = I40E_ADMINQ_DESC(*asq, ntc);
details = I40E_ADMINQ_DETAILS(*asq, ntc);
- while (rd32(hw, hw->aq.asq.head) != ntc) {
+ while (rd32(hw, I40E_PF_ATQH) != ntc) {
i40e_debug(hw, I40E_DEBUG_AQ_COMMAND,
- "ntc %d head %d.\n", ntc, rd32(hw, hw->aq.asq.head));
+ "ntc %d head %d.\n", ntc, rd32(hw, I40E_PF_ATQH));
if (details->callback) {
I40E_ADMINQ_CALLBACK cb_func =
@@ -756,7 +732,7 @@ static bool i40e_asq_done(struct i40e_hw *hw)
/* AQ designers suggest use of head for better
* timing reliability than DD bit
*/
- return rd32(hw, hw->aq.asq.head) == hw->aq.asq.next_to_use;
+ return rd32(hw, I40E_PF_ATQH) == hw->aq.asq.next_to_use;
}
@@ -797,7 +773,7 @@ i40e_asq_send_command_atomic_exec(struct i40e_hw *hw,
hw->aq.asq_last_status = I40E_AQ_RC_OK;
- val = rd32(hw, hw->aq.asq.head);
+ val = rd32(hw, I40E_PF_ATQH);
if (val >= hw->aq.num_asq_entries) {
i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
"AQTX: head overrun at %d\n", val);
@@ -889,7 +865,7 @@ i40e_asq_send_command_atomic_exec(struct i40e_hw *hw,
if (hw->aq.asq.next_to_use == hw->aq.asq.count)
hw->aq.asq.next_to_use = 0;
if (!details->postpone)
- wr32(hw, hw->aq.asq.tail, hw->aq.asq.next_to_use);
+ wr32(hw, I40E_PF_ATQT, hw->aq.asq.next_to_use);
/* if cmd_details are not defined or async flag is not set,
* we need to wait for desc write back
@@ -949,7 +925,7 @@ i40e_asq_send_command_atomic_exec(struct i40e_hw *hw,
/* update the error if time out occurred */
if ((!cmd_completed) &&
(!details->async && !details->postpone)) {
- if (rd32(hw, hw->aq.asq.len) & I40E_GL_ATQLEN_ATQCRIT_MASK) {
+ if (rd32(hw, I40E_PF_ATQLEN) & I40E_GL_ATQLEN_ATQCRIT_MASK) {
i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
"AQTX: AQ Critical error.\n");
status = -EIO;
@@ -1103,7 +1079,7 @@ int i40e_clean_arq_element(struct i40e_hw *hw,
}
/* set next_to_use to head */
- ntu = rd32(hw, hw->aq.arq.head) & I40E_PF_ARQH_ARQH_MASK;
+ ntu = rd32(hw, I40E_PF_ARQH) & I40E_PF_ARQH_ARQH_MASK;
if (ntu == ntc) {
/* nothing to do - shouldn't need to update ring's values */
ret_code = -EALREADY;
@@ -1151,7 +1127,7 @@ int i40e_clean_arq_element(struct i40e_hw *hw,
desc->params.external.addr_low = cpu_to_le32(lower_32_bits(bi->pa));
/* set tail = the last cleaned desc index. */
- wr32(hw, hw->aq.arq.tail, ntc);
+ wr32(hw, I40E_PF_ARQT, ntc);
/* ntc is updated to tail + 1 */
ntc++;
if (ntc == hw->aq.num_arq_entries)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_adminq.h b/drivers/net/ethernet/intel/i40e/i40e_adminq.h
index 80125bea80a2..ee86d2c53079 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_adminq.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_adminq.h
@@ -29,13 +29,6 @@ struct i40e_adminq_ring {
/* used for interrupt processing */
u16 next_to_use;
u16 next_to_clean;
-
- /* used for queue tracking */
- u32 head;
- u32 tail;
- u32 len;
- u32 bah;
- u32 bal;
};
/* ASQ transaction details */
diff --git a/drivers/net/ethernet/intel/i40e/i40e_common.c b/drivers/net/ethernet/intel/i40e/i40e_common.c
index e171f4814e21..bd52b73cf61f 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_common.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_common.c
@@ -195,11 +195,11 @@ void i40e_debug_aq(struct i40e_hw *hw, enum i40e_debug_mask mask, void *desc,
**/
bool i40e_check_asq_alive(struct i40e_hw *hw)
{
- if (hw->aq.asq.len)
- return !!(rd32(hw, hw->aq.asq.len) &
- I40E_PF_ATQLEN_ATQENABLE_MASK);
- else
+ /* Check if the queue is initialized */
+ if (!hw->aq.asq.count)
return false;
+
+ return !!(rd32(hw, I40E_PF_ATQLEN) & I40E_PF_ATQLEN_ATQENABLE_MASK);
}
/**
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 69dafdecb243..91563512b2bd 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -10141,7 +10141,7 @@ static void i40e_clean_adminq_subtask(struct i40e_pf *pf)
return;
/* check for error indications */
- val = rd32(&pf->hw, pf->hw.aq.arq.len);
+ val = rd32(&pf->hw, I40E_PF_ARQLEN);
i40e_trace(state_arq, pf, val);
oldval = val;
if (val & I40E_PF_ARQLEN_ARQVFE_MASK) {
@@ -10161,9 +10161,9 @@ static void i40e_clean_adminq_subtask(struct i40e_pf *pf)
val &= ~I40E_PF_ARQLEN_ARQCRIT_MASK;
}
if (oldval != val)
- wr32(&pf->hw, pf->hw.aq.arq.len, val);
+ wr32(&pf->hw, I40E_PF_ARQLEN, val);
- val = rd32(&pf->hw, pf->hw.aq.asq.len);
+ val = rd32(&pf->hw, I40E_PF_ATQLEN);
i40e_trace(state_asq, pf, val);
oldval = val;
if (val & I40E_PF_ATQLEN_ATQVFE_MASK) {
@@ -10182,7 +10182,7 @@ static void i40e_clean_adminq_subtask(struct i40e_pf *pf)
val &= ~I40E_PF_ATQLEN_ATQCRIT_MASK;
}
if (oldval != val)
- wr32(&pf->hw, pf->hw.aq.asq.len, val);
+ wr32(&pf->hw, I40E_PF_ATQLEN, val);
event.buf_len = I40E_MAX_AQ_BUF_SIZE;
event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
--
2.41.0
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