// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2018, Intel Corporation. */
#include "ice_common.h"
#define ICE_CQ_INIT_REGS(qinfo, prefix) \
do { \
(qinfo)->sq.head = prefix## _ATQH; \
(qinfo)->sq.tail = prefix## _ATQT; \
(qinfo)->sq.len = prefix## _ATQLEN; \
(qinfo)->sq.bah = prefix## _ATQBAH; \
(qinfo)->sq.bal = prefix## _ATQBAL; \
(qinfo)->sq.len_mask = prefix## _ATQLEN_ATQLEN_M; \
(qinfo)->sq.len_ena_mask = prefix## _ATQLEN_ATQENABLE_M; \
(qinfo)->sq.len_crit_mask = prefix## _ATQLEN_ATQCRIT_M; \
(qinfo)->sq.head_mask = prefix## _ATQH_ATQH_M; \
(qinfo)->rq.head = prefix## _ARQH; \
(qinfo)->rq.tail = prefix## _ARQT; \
(qinfo)->rq.len = prefix## _ARQLEN; \
(qinfo)->rq.bah = prefix## _ARQBAH; \
(qinfo)->rq.bal = prefix## _ARQBAL; \
(qinfo)->rq.len_mask = prefix## _ARQLEN_ARQLEN_M; \
(qinfo)->rq.len_ena_mask = prefix## _ARQLEN_ARQENABLE_M; \
(qinfo)->rq.len_crit_mask = prefix## _ARQLEN_ARQCRIT_M; \
(qinfo)->rq.head_mask = prefix## _ARQH_ARQH_M; \
} while (0 )
/**
* ice_adminq_init_regs - Initialize AdminQ registers
* @ hw : pointer to the hardware structure
*
* This assumes the alloc_sq and alloc_rq functions have already been called
*/
static void ice_adminq_init_regs(struct ice_hw *hw)
{
struct ice_ctl_q_info *cq = &hw->adminq;
ICE_CQ_INIT_REGS(cq, PF_FW);
}
/**
* ice_mailbox_init_regs - Initialize Mailbox registers
* @ hw : pointer to the hardware structure
*
* This assumes the alloc_sq and alloc_rq functions have already been called
*/
static void ice_mailbox_init_regs(struct ice_hw *hw)
{
struct ice_ctl_q_info *cq = &hw->mailboxq;
ICE_CQ_INIT_REGS(cq, PF_MBX);
}
/**
* ice_sb_init_regs - Initialize Sideband registers
* @ hw : pointer to the hardware structure
*
* This assumes the alloc_sq and alloc_rq functions have already been called
*/
static void ice_sb_init_regs(struct ice_hw *hw)
{
struct ice_ctl_q_info *cq = &hw->sbq;
ICE_CQ_INIT_REGS(cq, PF_SB);
}
/**
* ice_check_sq_alive
* @ hw : pointer to the HW struct
* @ cq : pointer to the specific Control queue
*
* Returns true if Queue is enabled else false .
*/
bool ice_check_sq_alive(struct ice_hw *hw, struct ice_ctl_q_info *cq)
{
/* check both queue-length and queue-enable fields */
if (cq->sq.len && cq->sq.len_mask && cq->sq.len_ena_mask)
return (rd32(hw, cq->sq.len) & (cq->sq.len_mask |
cq->sq.len_ena_mask)) ==
(cq->num_sq_entries | cq->sq.len_ena_mask);
return false ;
}
/**
* ice_alloc_ctrlq_sq_ring - Allocate Control Transmit Queue ( ATQ ) rings
* @ hw : pointer to the hardware structure
* @ cq : pointer to the specific Control queue
*/
static int
ice_alloc_ctrlq_sq_ring(struct ice_hw *hw, struct ice_ctl_q_info *cq)
{
size_t size = cq->num_sq_entries * sizeof (struct libie_aq_desc);
cq->sq.desc_buf.va = dmam_alloc_coherent(ice_hw_to_dev(hw), size,
&cq->sq.desc_buf.pa,
GFP_KERNEL | __GFP_ZERO);
if (!cq->sq.desc_buf.va)
return -ENOMEM;
cq->sq.desc_buf.size = size;
return 0 ;
}
/**
* ice_alloc_ctrlq_rq_ring - Allocate Control Receive Queue ( ARQ ) rings
* @ hw : pointer to the hardware structure
* @ cq : pointer to the specific Control queue
*/
static int
ice_alloc_ctrlq_rq_ring(struct ice_hw *hw, struct ice_ctl_q_info *cq)
{
size_t size = cq->num_rq_entries * sizeof (struct libie_aq_desc);
cq->rq.desc_buf.va = dmam_alloc_coherent(ice_hw_to_dev(hw), size,
&cq->rq.desc_buf.pa,
GFP_KERNEL | __GFP_ZERO);
if (!cq->rq.desc_buf.va)
return -ENOMEM;
cq->rq.desc_buf.size = size;
return 0 ;
}
/**
* ice_free_cq_ring - Free control queue ring
* @ hw : pointer to the hardware structure
* @ ring : pointer to the specific control queue ring
*
* This assumes the posted buffers have already been cleaned
* and de - allocated
*/
static void ice_free_cq_ring(struct ice_hw *hw, struct ice_ctl_q_ring *ring)
{
dmam_free_coherent(ice_hw_to_dev(hw), ring->desc_buf.size,
ring->desc_buf.va, ring->desc_buf.pa);
ring->desc_buf.va = NULL;
ring->desc_buf.pa = 0 ;
ring->desc_buf.size = 0 ;
}
/**
* ice_alloc_rq_bufs - Allocate pre - posted buffers for the ARQ
* @ hw : pointer to the hardware structure
* @ cq : pointer to the specific Control queue
*/
static int
ice_alloc_rq_bufs(struct ice_hw *hw, struct ice_ctl_q_info *cq)
{
int i;
/* We'll be allocating the buffer info memory first, then we can
* allocate the mapped buffers for the event processing
*/
cq->rq.dma_head = devm_kcalloc(ice_hw_to_dev(hw), cq->num_rq_entries,
sizeof (cq->rq.desc_buf), GFP_KERNEL);
if (!cq->rq.dma_head)
return -ENOMEM;
cq->rq.r.rq_bi = (struct ice_dma_mem *)cq->rq.dma_head;
/* allocate the mapped buffers */
for (i = 0 ; i < cq->num_rq_entries; i++) {
struct libie_aq_desc *desc;
struct ice_dma_mem *bi;
bi = &cq->rq.r.rq_bi[i];
bi->va = dmam_alloc_coherent(ice_hw_to_dev(hw),
cq->rq_buf_size, &bi->pa,
GFP_KERNEL | __GFP_ZERO);
if (!bi->va)
goto unwind_alloc_rq_bufs;
bi->size = cq->rq_buf_size;
/* now configure the descriptors for use */
desc = ICE_CTL_Q_DESC(cq->rq, i);
desc->flags = cpu_to_le16(LIBIE_AQ_FLAG_BUF);
if (cq->rq_buf_size > LIBIE_AQ_LG_BUF)
desc->flags |= cpu_to_le16(LIBIE_AQ_FLAG_LB);
desc->opcode = 0 ;
/* This is in accordance with control queue design, there is no
* register for buffer size configuration
*/
desc->datalen = cpu_to_le16(bi->size);
desc->retval = 0 ;
desc->cookie_high = 0 ;
desc->cookie_low = 0 ;
desc->params.generic.addr_high =
cpu_to_le32(upper_32_bits(bi->pa));
desc->params.generic.addr_low =
cpu_to_le32(lower_32_bits(bi->pa));
desc->params.generic.param0 = 0 ;
desc->params.generic.param1 = 0 ;
}
return 0 ;
unwind_alloc_rq_bufs:
/* don't try to free the one that failed... */
i--;
for (; i >= 0 ; i--) {
dmam_free_coherent(ice_hw_to_dev(hw), cq->rq.r.rq_bi[i].size,
cq->rq.r.rq_bi[i].va, cq->rq.r.rq_bi[i].pa);
cq->rq.r.rq_bi[i].va = NULL;
cq->rq.r.rq_bi[i].pa = 0 ;
cq->rq.r.rq_bi[i].size = 0 ;
}
cq->rq.r.rq_bi = NULL;
devm_kfree(ice_hw_to_dev(hw), cq->rq.dma_head);
cq->rq.dma_head = NULL;
return -ENOMEM;
}
/**
* ice_alloc_sq_bufs - Allocate empty buffer structs for the ATQ
* @ hw : pointer to the hardware structure
* @ cq : pointer to the specific Control queue
*/
static int
ice_alloc_sq_bufs(struct ice_hw *hw, struct ice_ctl_q_info *cq)
{
int i;
/* No mapped memory needed yet, just the buffer info structures */
cq->sq.dma_head = devm_kcalloc(ice_hw_to_dev(hw), cq->num_sq_entries,
sizeof (cq->sq.desc_buf), GFP_KERNEL);
if (!cq->sq.dma_head)
return -ENOMEM;
cq->sq.r.sq_bi = (struct ice_dma_mem *)cq->sq.dma_head;
/* allocate the mapped buffers */
for (i = 0 ; i < cq->num_sq_entries; i++) {
struct ice_dma_mem *bi;
bi = &cq->sq.r.sq_bi[i];
bi->va = dmam_alloc_coherent(ice_hw_to_dev(hw),
cq->sq_buf_size, &bi->pa,
GFP_KERNEL | __GFP_ZERO);
if (!bi->va)
goto unwind_alloc_sq_bufs;
bi->size = cq->sq_buf_size;
}
return 0 ;
unwind_alloc_sq_bufs:
/* don't try to free the one that failed... */
i--;
for (; i >= 0 ; i--) {
dmam_free_coherent(ice_hw_to_dev(hw), cq->sq.r.sq_bi[i].size,
cq->sq.r.sq_bi[i].va, cq->sq.r.sq_bi[i].pa);
cq->sq.r.sq_bi[i].va = NULL;
cq->sq.r.sq_bi[i].pa = 0 ;
cq->sq.r.sq_bi[i].size = 0 ;
}
cq->sq.r.sq_bi = NULL;
devm_kfree(ice_hw_to_dev(hw), cq->sq.dma_head);
cq->sq.dma_head = NULL;
return -ENOMEM;
}
static int
ice_cfg_cq_regs(struct ice_hw *hw, struct ice_ctl_q_ring *ring, u16 num_entries)
{
/* Clear Head and Tail */
wr32(hw, ring->head, 0 );
wr32(hw, ring->tail, 0 );
/* set starting point */
wr32(hw, ring->len, (num_entries | ring->len_ena_mask));
wr32(hw, ring->bal, lower_32_bits(ring->desc_buf.pa));
wr32(hw, ring->bah, upper_32_bits(ring->desc_buf.pa));
/* Check one register to verify that config was applied */
if (rd32(hw, ring->bal) != lower_32_bits(ring->desc_buf.pa))
return -EIO;
return 0 ;
}
/**
* ice_cfg_sq_regs - configure Control ATQ registers
* @ hw : pointer to the hardware structure
* @ cq : pointer to the specific Control queue
*
* Configure base address and length registers for the transmit queue
*/
static int ice_cfg_sq_regs(struct ice_hw *hw, struct ice_ctl_q_info *cq)
{
return ice_cfg_cq_regs(hw, &cq->sq, cq->num_sq_entries);
}
/**
* ice_cfg_rq_regs - configure Control ARQ register
* @ hw : pointer to the hardware structure
* @ cq : pointer to the specific Control queue
*
* Configure base address and length registers for the receive ( event queue )
*/
static int ice_cfg_rq_regs(struct ice_hw *hw, struct ice_ctl_q_info *cq)
{
int status;
status = ice_cfg_cq_regs(hw, &cq->rq, cq->num_rq_entries);
if (status)
return status;
/* Update tail in the HW to post pre-allocated buffers */
wr32(hw, cq->rq.tail, (u32)(cq->num_rq_entries - 1 ));
return 0 ;
}
#define ICE_FREE_CQ_BUFS(hw, qi, ring) \
do { \
/* free descriptors */ \
if ((qi)->ring.r.ring## _bi) { \
int i; \
\
for (i = 0 ; i < (qi)->num_## ring## _entries; i++) \
if ((qi)->ring.r.ring## _bi[i].pa) { \
dmam_free_coherent(ice_hw_to_dev(hw), \
(qi)->ring.r.ring## _bi[i].size, \
(qi)->ring.r.ring## _bi[i].va, \
(qi)->ring.r.ring## _bi[i].pa); \
(qi)->ring.r.ring## _bi[i].va = NULL;\
(qi)->ring.r.ring## _bi[i].pa = 0 ;\
(qi)->ring.r.ring## _bi[i].size = 0 ;\
} \
} \
/* free DMA head */ \
devm_kfree(ice_hw_to_dev(hw), (qi)->ring.dma_head); \
} while (0 )
/**
* ice_init_sq - main initialization routine for Control ATQ
* @ hw : pointer to the hardware structure
* @ cq : pointer to the specific Control queue
*
* This is the main initialization routine for the Control Send Queue
* Prior to calling this function , the driver * MUST * set the following fields
* in the cq - > structure :
* - cq - > num_sq_entries
* - cq - > sq_buf_size
*
* Do * NOT * hold the lock when calling this as the memory allocation routines
* called are not going to be atomic context safe
*/
static int ice_init_sq(struct ice_hw *hw, struct ice_ctl_q_info *cq)
{
int ret_code;
if (cq->sq.count > 0 ) {
/* queue already initialized */
ret_code = -EBUSY;
goto init_ctrlq_exit;
}
/* verify input for valid configuration */
if (!cq->num_sq_entries || !cq->sq_buf_size) {
ret_code = -EIO;
goto init_ctrlq_exit;
}
cq->sq.next_to_use = 0 ;
cq->sq.next_to_clean = 0 ;
/* allocate the ring memory */
ret_code = ice_alloc_ctrlq_sq_ring(hw, cq);
if (ret_code)
goto init_ctrlq_exit;
/* allocate buffers in the rings */
ret_code = ice_alloc_sq_bufs(hw, cq);
if (ret_code)
goto init_ctrlq_free_rings;
/* initialize base registers */
ret_code = ice_cfg_sq_regs(hw, cq);
if (ret_code)
goto init_ctrlq_free_rings;
/* success! */
cq->sq.count = cq->num_sq_entries;
goto init_ctrlq_exit;
init_ctrlq_free_rings:
ICE_FREE_CQ_BUFS(hw, cq, sq);
ice_free_cq_ring(hw, &cq->sq);
init_ctrlq_exit:
return ret_code;
}
/**
* ice_init_rq - initialize receive side of a control queue
* @ hw : pointer to the hardware structure
* @ cq : pointer to the specific Control queue
*
* The main initialization routine for Receive side of a control queue .
* Prior to calling this function , the driver * MUST * set the following fields
* in the cq - > structure :
* - cq - > num_rq_entries
* - cq - > rq_buf_size
*
* Do * NOT * hold the lock when calling this as the memory allocation routines
* called are not going to be atomic context safe
*/
static int ice_init_rq(struct ice_hw *hw, struct ice_ctl_q_info *cq)
{
int ret_code;
if (cq->rq.count > 0 ) {
/* queue already initialized */
ret_code = -EBUSY;
goto init_ctrlq_exit;
}
/* verify input for valid configuration */
if (!cq->num_rq_entries || !cq->rq_buf_size) {
ret_code = -EIO;
goto init_ctrlq_exit;
}
cq->rq.next_to_use = 0 ;
cq->rq.next_to_clean = 0 ;
/* allocate the ring memory */
ret_code = ice_alloc_ctrlq_rq_ring(hw, cq);
if (ret_code)
goto init_ctrlq_exit;
/* allocate buffers in the rings */
ret_code = ice_alloc_rq_bufs(hw, cq);
if (ret_code)
goto init_ctrlq_free_rings;
/* initialize base registers */
ret_code = ice_cfg_rq_regs(hw, cq);
if (ret_code)
goto init_ctrlq_free_rings;
/* success! */
cq->rq.count = cq->num_rq_entries;
goto init_ctrlq_exit;
init_ctrlq_free_rings:
ICE_FREE_CQ_BUFS(hw, cq, rq);
ice_free_cq_ring(hw, &cq->rq);
init_ctrlq_exit:
return ret_code;
}
/**
* ice_shutdown_sq - shutdown the transmit side of a control queue
* @ hw : pointer to the hardware structure
* @ cq : pointer to the specific Control queue
*
* The main shutdown routine for the Control Transmit Queue
*/
static int ice_shutdown_sq(struct ice_hw *hw, struct ice_ctl_q_info *cq)
{
int ret_code = 0 ;
mutex_lock(&cq->sq_lock);
if (!cq->sq.count) {
ret_code = -EBUSY;
goto shutdown_sq_out;
}
/* Stop processing of the control queue */
wr32(hw, cq->sq.head, 0 );
wr32(hw, cq->sq.tail, 0 );
wr32(hw, cq->sq.len, 0 );
wr32(hw, cq->sq.bal, 0 );
wr32(hw, cq->sq.bah, 0 );
cq->sq.count = 0 ; /* to indicate uninitialized queue */
/* free ring buffers and the ring itself */
ICE_FREE_CQ_BUFS(hw, cq, sq);
ice_free_cq_ring(hw, &cq->sq);
shutdown_sq_out:
mutex_unlock(&cq->sq_lock);
return ret_code;
}
/**
* ice_aq_ver_check - Check the reported AQ API version
* @ hw : pointer to the hardware structure
*
* Checks if the driver should load on a given AQ API version .
*
* Return : ' true ' iff the driver should attempt to load . ' false ' otherwise .
*/
static bool ice_aq_ver_check(struct ice_hw *hw)
{
u8 exp_fw_api_ver_major = EXP_FW_API_VER_MAJOR_BY_MAC(hw);
u8 exp_fw_api_ver_minor = EXP_FW_API_VER_MINOR_BY_MAC(hw);
if (hw->api_maj_ver > exp_fw_api_ver_major) {
/* Major API version is newer than expected, don't load */
dev_warn(ice_hw_to_dev(hw),
"The driver for the device stopped because the NVM image is newer than expected. You must install the most recent version of the network driver.\n" );
return false ;
} else if (hw->api_maj_ver == exp_fw_api_ver_major) {
if (hw->api_min_ver > (exp_fw_api_ver_minor + 2 ))
dev_info(ice_hw_to_dev(hw),
"The driver for the device detected a newer version (%u.%u) of the NVM image than expected (%u.%u). Please install the most recent version of the network driver.\n" ,
hw->api_maj_ver, hw->api_min_ver,
exp_fw_api_ver_major, exp_fw_api_ver_minor);
else if ((hw->api_min_ver + 2 ) < exp_fw_api_ver_minor)
dev_info(ice_hw_to_dev(hw),
"The driver for the device detected an older version (%u.%u) of the NVM image than expected (%u.%u). Please update the NVM image.\n" ,
hw->api_maj_ver, hw->api_min_ver,
exp_fw_api_ver_major, exp_fw_api_ver_minor);
} else {
/* Major API version is older than expected, log a warning */
dev_info(ice_hw_to_dev(hw),
"The driver for the device detected an older version (%u.%u) of the NVM image than expected (%u.%u). Please update the NVM image.\n" ,
hw->api_maj_ver, hw->api_min_ver,
exp_fw_api_ver_major, exp_fw_api_ver_minor);
}
return true ;
}
/**
* ice_shutdown_rq - shutdown Control ARQ
* @ hw : pointer to the hardware structure
* @ cq : pointer to the specific Control queue
*
* The main shutdown routine for the Control Receive Queue
*/
static int ice_shutdown_rq(struct ice_hw *hw, struct ice_ctl_q_info *cq)
{
int ret_code = 0 ;
mutex_lock(&cq->rq_lock);
if (!cq->rq.count) {
ret_code = -EBUSY;
goto shutdown_rq_out;
}
/* Stop Control Queue processing */
wr32(hw, cq->rq.head, 0 );
wr32(hw, cq->rq.tail, 0 );
wr32(hw, cq->rq.len, 0 );
wr32(hw, cq->rq.bal, 0 );
wr32(hw, cq->rq.bah, 0 );
/* set rq.count to 0 to indicate uninitialized queue */
cq->rq.count = 0 ;
/* free ring buffers and the ring itself */
ICE_FREE_CQ_BUFS(hw, cq, rq);
ice_free_cq_ring(hw, &cq->rq);
shutdown_rq_out:
mutex_unlock(&cq->rq_lock);
return ret_code;
}
/**
* ice_init_check_adminq - Check version for Admin Queue to know if its alive
* @ hw : pointer to the hardware structure
*/
static int ice_init_check_adminq(struct ice_hw *hw)
{
struct ice_ctl_q_info *cq = &hw->adminq;
int status;
status = ice_aq_get_fw_ver(hw, NULL);
if (status)
goto init_ctrlq_free_rq;
if (!ice_aq_ver_check(hw)) {
status = -EIO;
goto init_ctrlq_free_rq;
}
return 0 ;
init_ctrlq_free_rq:
ice_shutdown_rq(hw, cq);
ice_shutdown_sq(hw, cq);
return status;
}
/**
* ice_init_ctrlq - main initialization routine for any control Queue
* @ hw : pointer to the hardware structure
* @ q_type : specific Control queue type
*
* Prior to calling this function , the driver * MUST * set the following fields
* in the cq - > structure :
* - cq - > num_sq_entries
* - cq - > num_rq_entries
* - cq - > rq_buf_size
* - cq - > sq_buf_size
*
* NOTE : this function does not initialize the controlq locks
*/
static int ice_init_ctrlq(struct ice_hw *hw, enum ice_ctl_q q_type)
{
struct ice_ctl_q_info *cq;
int ret_code;
switch (q_type) {
case ICE_CTL_Q_ADMIN:
ice_adminq_init_regs(hw);
cq = &hw->adminq;
break ;
case ICE_CTL_Q_SB:
ice_sb_init_regs(hw);
cq = &hw->sbq;
break ;
case ICE_CTL_Q_MAILBOX:
ice_mailbox_init_regs(hw);
cq = &hw->mailboxq;
break ;
default :
return -EINVAL;
}
cq->qtype = q_type;
/* verify input for valid configuration */
if (!cq->num_rq_entries || !cq->num_sq_entries ||
!cq->rq_buf_size || !cq->sq_buf_size) {
return -EIO;
}
/* allocate the ATQ */
ret_code = ice_init_sq(hw, cq);
if (ret_code)
return ret_code;
/* allocate the ARQ */
ret_code = ice_init_rq(hw, cq);
if (ret_code)
goto init_ctrlq_free_sq;
/* success! */
return 0 ;
init_ctrlq_free_sq:
ice_shutdown_sq(hw, cq);
return ret_code;
}
/**
* ice_is_sbq_supported - is the sideband queue supported
* @ hw : pointer to the hardware structure
*
* Returns true if the sideband control queue interface is
* supported for the device , false otherwise
*/
bool ice_is_sbq_supported(struct ice_hw *hw)
{
/* The device sideband queue is only supported on devices with the
* generic MAC type .
*/
return ice_is_generic_mac(hw);
}
/**
* ice_get_sbq - returns the right control queue to use for sideband
* @ hw : pointer to the hardware structure
*/
struct ice_ctl_q_info *ice_get_sbq(struct ice_hw *hw)
{
if (ice_is_sbq_supported(hw))
return &hw->sbq;
return &hw->adminq;
}
/**
* ice_shutdown_ctrlq - shutdown routine for any control queue
* @ hw : pointer to the hardware structure
* @ q_type : specific Control queue type
* @ unloading : is the driver unloading itself
*
* NOTE : this function does not destroy the control queue locks .
*/
static void ice_shutdown_ctrlq(struct ice_hw *hw, enum ice_ctl_q q_type,
bool unloading)
{
struct ice_ctl_q_info *cq;
switch (q_type) {
case ICE_CTL_Q_ADMIN:
cq = &hw->adminq;
if (ice_check_sq_alive(hw, cq))
ice_aq_q_shutdown(hw, unloading);
break ;
case ICE_CTL_Q_SB:
cq = &hw->sbq;
break ;
case ICE_CTL_Q_MAILBOX:
cq = &hw->mailboxq;
break ;
default :
return ;
}
ice_shutdown_sq(hw, cq);
ice_shutdown_rq(hw, cq);
}
/**
* ice_shutdown_all_ctrlq - shutdown routine for all control queues
* @ hw : pointer to the hardware structure
* @ unloading : is the driver unloading itself
*
* NOTE : this function does not destroy the control queue locks . The driver
* may call this at runtime to shutdown and later restart control queues , such
* as in response to a reset event .
*/
void ice_shutdown_all_ctrlq(struct ice_hw *hw, bool unloading)
{
/* Shutdown FW admin queue */
ice_shutdown_ctrlq(hw, ICE_CTL_Q_ADMIN, unloading);
/* Shutdown PHY Sideband */
if (ice_is_sbq_supported(hw))
ice_shutdown_ctrlq(hw, ICE_CTL_Q_SB, unloading);
/* Shutdown PF-VF Mailbox */
ice_shutdown_ctrlq(hw, ICE_CTL_Q_MAILBOX, unloading);
}
/**
* ice_init_all_ctrlq - main initialization routine for all control queues
* @ hw : pointer to the hardware structure
*
* Prior to calling this function , the driver MUST * set the following fields
* in the cq - > structure for all control queues :
* - cq - > num_sq_entries
* - cq - > num_rq_entries
* - cq - > rq_buf_size
* - cq - > sq_buf_size
*
* NOTE : this function does not initialize the controlq locks .
*/
int ice_init_all_ctrlq(struct ice_hw *hw)
{
u32 retry = 0 ;
int status;
/* Init FW admin queue */
do {
status = ice_init_ctrlq(hw, ICE_CTL_Q_ADMIN);
if (status)
return status;
status = ice_init_check_adminq(hw);
if (status != -EIO)
break ;
ice_debug(hw, ICE_DBG_AQ_MSG, "Retry Admin Queue init due to FW critical error\n" );
ice_shutdown_ctrlq(hw, ICE_CTL_Q_ADMIN, true );
msleep(ICE_CTL_Q_ADMIN_INIT_MSEC);
} while (retry++ < ICE_CTL_Q_ADMIN_INIT_TIMEOUT);
if (status)
return status;
/* sideband control queue (SBQ) interface is not supported on some
* devices . Initialize if supported , else fallback to the admin queue
* interface
*/
if (ice_is_sbq_supported(hw)) {
status = ice_init_ctrlq(hw, ICE_CTL_Q_SB);
if (status)
return status;
}
/* Init Mailbox queue */
return ice_init_ctrlq(hw, ICE_CTL_Q_MAILBOX);
}
/**
* ice_init_ctrlq_locks - Initialize locks for a control queue
* @ cq : pointer to the control queue
*
* Initializes the send and receive queue locks for a given control queue .
*/
static void ice_init_ctrlq_locks(struct ice_ctl_q_info *cq)
{
mutex_init(&cq->sq_lock);
mutex_init(&cq->rq_lock);
}
/**
* ice_create_all_ctrlq - main initialization routine for all control queues
* @ hw : pointer to the hardware structure
*
* Prior to calling this function , the driver * MUST * set the following fields
* in the cq - > structure for all control queues :
* - cq - > num_sq_entries
* - cq - > num_rq_entries
* - cq - > rq_buf_size
* - cq - > sq_buf_size
*
* This function creates all the control queue locks and then calls
* ice_init_all_ctrlq . It should be called once during driver load . If the
* driver needs to re - initialize control queues at run time it should call
* ice_init_all_ctrlq instead .
*/
int ice_create_all_ctrlq(struct ice_hw *hw)
{
ice_init_ctrlq_locks(&hw->adminq);
if (ice_is_sbq_supported(hw))
ice_init_ctrlq_locks(&hw->sbq);
ice_init_ctrlq_locks(&hw->mailboxq);
return ice_init_all_ctrlq(hw);
}
/**
* ice_destroy_ctrlq_locks - Destroy locks for a control queue
* @ cq : pointer to the control queue
*
* Destroys the send and receive queue locks for a given control queue .
*/
static void ice_destroy_ctrlq_locks(struct ice_ctl_q_info *cq)
{
mutex_destroy(&cq->sq_lock);
mutex_destroy(&cq->rq_lock);
}
/**
* ice_destroy_all_ctrlq - exit routine for all control queues
* @ hw : pointer to the hardware structure
*
* This function shuts down all the control queues and then destroys the
* control queue locks . It should be called once during driver unload . The
* driver should call ice_shutdown_all_ctrlq if it needs to shut down and
* reinitialize control queues , such as in response to a reset event .
*/
void ice_destroy_all_ctrlq(struct ice_hw *hw)
{
/* shut down all the control queues first */
ice_shutdown_all_ctrlq(hw, true );
ice_destroy_ctrlq_locks(&hw->adminq);
if (ice_is_sbq_supported(hw))
ice_destroy_ctrlq_locks(&hw->sbq);
ice_destroy_ctrlq_locks(&hw->mailboxq);
}
/**
* ice_clean_sq - cleans send side of a control queue
* @ hw : pointer to the hardware structure
* @ cq : pointer to the specific Control queue
*
* returns the number of free desc
*/
static u16 ice_clean_sq(struct ice_hw *hw, struct ice_ctl_q_info *cq)
{
struct ice_ctl_q_ring *sq = &cq->sq;
u16 ntc = sq->next_to_clean;
struct libie_aq_desc *desc;
desc = ICE_CTL_Q_DESC(*sq, ntc);
while (rd32(hw, cq->sq.head) != ntc) {
ice_debug(hw, ICE_DBG_AQ_MSG, "ntc %d head %d.\n" , ntc, rd32(hw, cq->sq.head));
memset(desc, 0 , sizeof (*desc));
ntc++;
if (ntc == sq->count)
ntc = 0 ;
desc = ICE_CTL_Q_DESC(*sq, ntc);
}
sq->next_to_clean = ntc;
return ICE_CTL_Q_DESC_UNUSED(sq);
}
/**
* ice_ctl_q_str - Convert control queue type to string
* @ qtype : the control queue type
*
* Return : A string name for the given control queue type .
*/
static const char *ice_ctl_q_str(enum ice_ctl_q qtype)
{
switch (qtype) {
case ICE_CTL_Q_UNKNOWN:
return "Unknown CQ" ;
case ICE_CTL_Q_ADMIN:
return "AQ" ;
case ICE_CTL_Q_MAILBOX:
return "MBXQ" ;
case ICE_CTL_Q_SB:
return "SBQ" ;
default :
return "Unrecognized CQ" ;
}
}
/**
* ice_debug_cq
* @ hw : pointer to the hardware structure
* @ cq : pointer to the specific Control queue
* @ desc : pointer to control queue descriptor
* @ buf : pointer to command buffer
* @ buf_len : max length of buf
* @ response : true if this is the writeback response
*
* Dumps debug log about control command with descriptor contents .
*/
static void ice_debug_cq(struct ice_hw *hw, struct ice_ctl_q_info *cq,
void *desc, void *buf, u16 buf_len, bool response)
{
struct libie_aq_desc *cq_desc = desc;
u16 datalen, flags;
if (!IS_ENABLED(CONFIG_DYNAMIC_DEBUG) &&
!((ICE_DBG_AQ_DESC | ICE_DBG_AQ_DESC_BUF) & hw->debug_mask))
return ;
if (!desc)
return ;
datalen = le16_to_cpu(cq_desc->datalen);
flags = le16_to_cpu(cq_desc->flags);
ice_debug(hw, ICE_DBG_AQ_DESC, "%s %s: opcode 0x%04X, flags 0x%04X, datalen 0x%04X, retval 0x%04X\n\tcookie (h,l) 0x%08X 0x%08X\n\tparam (0,1) 0x%08X 0x%08X\n\taddr (h,l) 0x%08X 0x%08X\n" ,
ice_ctl_q_str(cq->qtype), response ? "Response" : "Command" ,
le16_to_cpu(cq_desc->opcode), flags, datalen,
le16_to_cpu(cq_desc->retval),
le32_to_cpu(cq_desc->cookie_high),
le32_to_cpu(cq_desc->cookie_low),
le32_to_cpu(cq_desc->params.generic.param0),
le32_to_cpu(cq_desc->params.generic.param1),
le32_to_cpu(cq_desc->params.generic.addr_high),
le32_to_cpu(cq_desc->params.generic.addr_low));
/* Dump buffer iff 1) one exists and 2) is either a response indicated
* by the DD and / or CMP flag set or a command with the RD flag set .
*/
if (buf && cq_desc->datalen &&
(flags & (LIBIE_AQ_FLAG_DD | LIBIE_AQ_FLAG_CMP |
LIBIE_AQ_FLAG_RD))) {
char prefix[] = KBUILD_MODNAME " 0x12341234 0x12341234 " ;
sprintf(prefix, KBUILD_MODNAME " 0x%08X 0x%08X " ,
le32_to_cpu(cq_desc->params.generic.addr_high),
le32_to_cpu(cq_desc->params.generic.addr_low));
ice_debug_array_w_prefix(hw, ICE_DBG_AQ_DESC_BUF, prefix,
buf,
min_t(u16, buf_len, datalen));
}
}
/**
* ice_sq_done - poll until the last send on a control queue has completed
* @ hw : pointer to the HW struct
* @ cq : pointer to the specific Control queue
*
* Use read_poll_timeout to poll the control queue head , checking until it
* matches next_to_use . According to the control queue designers , this has
* better timing reliability than the DD bit .
*
* Return : true if all the descriptors on the send side of a control queue
* are finished processing , false otherwise .
*/
static bool ice_sq_done(struct ice_hw *hw, struct ice_ctl_q_info *cq)
{
u32 head;
/* Wait a short time before the initial check, to allow hardware time
* for completion .
*/
udelay(5 );
return !rd32_poll_timeout(hw, cq->sq.head,
head, head == cq->sq.next_to_use,
20 , ICE_CTL_Q_SQ_CMD_TIMEOUT);
}
/**
* ice_sq_send_cmd - send command to a control queue
* @ hw : pointer to the HW struct
* @ cq : pointer to the specific Control queue
* @ desc : prefilled descriptor describing the command
* @ 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
*
* Main command for the transmit side of a control queue . It puts the command
* on the queue , bumps the tail , waits for processing of the command , captures
* command status and results , etc .
*/
int
ice_sq_send_cmd(struct ice_hw *hw, struct ice_ctl_q_info *cq,
struct libie_aq_desc *desc, void *buf, u16 buf_size,
struct ice_sq_cd *cd)
{
struct ice_dma_mem *dma_buf = NULL;
struct libie_aq_desc *desc_on_ring;
bool cmd_completed = false ;
int status = 0 ;
u16 retval = 0 ;
u32 val = 0 ;
/* if reset is in progress return a soft error */
if (hw->reset_ongoing)
return -EBUSY;
mutex_lock(&cq->sq_lock);
cq->sq_last_status = LIBIE_AQ_RC_OK;
if (!cq->sq.count) {
ice_debug(hw, ICE_DBG_AQ_MSG, "Control Send queue not initialized.\n" );
status = -EIO;
goto sq_send_command_error;
}
if ((buf && !buf_size) || (!buf && buf_size)) {
status = -EINVAL;
goto sq_send_command_error;
}
if (buf) {
if (buf_size > cq->sq_buf_size) {
ice_debug(hw, ICE_DBG_AQ_MSG, "Invalid buffer size for Control Send queue: %d.\n" ,
buf_size);
status = -EINVAL;
goto sq_send_command_error;
}
desc->flags |= cpu_to_le16(LIBIE_AQ_FLAG_BUF);
if (buf_size > LIBIE_AQ_LG_BUF)
desc->flags |= cpu_to_le16(LIBIE_AQ_FLAG_LB);
}
val = rd32(hw, cq->sq.head);
if (val >= cq->num_sq_entries) {
ice_debug(hw, ICE_DBG_AQ_MSG, "head overrun at %d in the Control Send Queue ring\n" ,
val);
status = -EIO;
goto sq_send_command_error;
}
/* Call clean and check queue available function to reclaim the
* descriptors that were processed by FW / MBX ; the function returns the
* number of desc available . The clean function called here could be
* called in a separate thread in case of asynchronous completions .
*/
if (ice_clean_sq(hw, cq) == 0 ) {
ice_debug(hw, ICE_DBG_AQ_MSG, "Error: Control Send Queue is full.\n" );
status = -ENOSPC;
goto sq_send_command_error;
}
/* initialize the temp desc pointer with the right desc */
desc_on_ring = ICE_CTL_Q_DESC(cq->sq, cq->sq.next_to_use);
/* if the desc is available copy the temp desc to the right place */
memcpy(desc_on_ring, desc, sizeof (*desc_on_ring));
/* if buf is not NULL assume indirect command */
if (buf) {
dma_buf = &cq->sq.r.sq_bi[cq->sq.next_to_use];
/* copy the user buf into the respective DMA buf */
memcpy(dma_buf->va, buf, buf_size);
desc_on_ring->datalen = cpu_to_le16(buf_size);
/* Update the address values in the desc with the pa value
* for respective buffer
*/
desc_on_ring->params.generic.addr_high =
cpu_to_le32(upper_32_bits(dma_buf->pa));
desc_on_ring->params.generic.addr_low =
cpu_to_le32(lower_32_bits(dma_buf->pa));
}
/* Debug desc and buffer */
ice_debug(hw, ICE_DBG_AQ_DESC, "ATQ: Control Send queue desc and buffer:\n" );
ice_debug_cq(hw, cq, (void *)desc_on_ring, buf, buf_size, false );
(cq->sq.next_to_use)++;
if (cq->sq.next_to_use == cq->sq.count)
cq->sq.next_to_use = 0 ;
wr32(hw, cq->sq.tail, cq->sq.next_to_use);
ice_flush(hw);
/* Wait for the command to complete. If it finishes within the
* timeout , copy the descriptor back to temp .
*/
if (ice_sq_done(hw, cq)) {
memcpy(desc, desc_on_ring, sizeof (*desc));
if (buf) {
/* get returned length to copy */
u16 copy_size = le16_to_cpu(desc->datalen);
if (copy_size > buf_size) {
ice_debug(hw, ICE_DBG_AQ_MSG, "Return len %d > than buf len %d\n" ,
copy_size, buf_size);
status = -EIO;
} else {
memcpy(buf, dma_buf->va, copy_size);
}
}
retval = le16_to_cpu(desc->retval);
if (retval) {
ice_debug(hw, ICE_DBG_AQ_MSG, "Control Send Queue command 0x%04X completed with error 0x%X\n" ,
le16_to_cpu(desc->opcode),
retval);
/* strip off FW internal code */
retval &= 0 xff;
}
cmd_completed = true ;
if (!status && retval != LIBIE_AQ_RC_OK)
status = -EIO;
cq->sq_last_status = (enum libie_aq_err)retval;
}
ice_debug(hw, ICE_DBG_AQ_MSG, "ATQ: desc and buffer writeback:\n" );
ice_debug_cq(hw, cq, (void *)desc, buf, buf_size, true );
/* save writeback AQ if requested */
if (cd && cd->wb_desc)
memcpy(cd->wb_desc, desc_on_ring, sizeof (*cd->wb_desc));
/* update the error if time out occurred */
if (!cmd_completed) {
if (rd32(hw, cq->rq.len) & cq->rq.len_crit_mask ||
rd32(hw, cq->sq.len) & cq->sq.len_crit_mask) {
ice_debug(hw, ICE_DBG_AQ_MSG, "Critical FW error.\n" );
status = -EIO;
} else {
ice_debug(hw, ICE_DBG_AQ_MSG, "Control Send Queue Writeback timeout.\n" );
status = -EIO;
}
}
sq_send_command_error:
mutex_unlock(&cq->sq_lock);
return status;
}
/**
* ice_fill_dflt_direct_cmd_desc - AQ descriptor helper function
* @ desc : pointer to the temp descriptor ( non DMA mem )
* @ opcode : the opcode can be used to decide which flags to turn off or on
*
* Fill the desc with default values
*/
void ice_fill_dflt_direct_cmd_desc(struct libie_aq_desc *desc, u16 opcode)
{
/* zero out the desc */
memset(desc, 0 , sizeof (*desc));
desc->opcode = cpu_to_le16(opcode);
desc->flags = cpu_to_le16(LIBIE_AQ_FLAG_SI);
}
/**
* ice_clean_rq_elem
* @ hw : pointer to the HW struct
* @ cq : pointer to the specific Control queue
* @ e : event info from the receive descriptor , includes any buffers
* @ pending : number of events that could be left to process
*
* Clean one element from the receive side of a control queue . On return ' e '
* contains contents of the message , and ' pending ' contains the number of
* events left to process .
*/
int
ice_clean_rq_elem(struct ice_hw *hw, struct ice_ctl_q_info *cq,
struct ice_rq_event_info *e, u16 *pending)
{
enum libie_aq_err rq_last_status;
u16 ntc = cq->rq.next_to_clean;
struct libie_aq_desc *desc;
struct ice_dma_mem *bi;
int ret_code = 0 ;
u16 desc_idx;
u16 datalen;
u16 flags;
u16 ntu;
/* pre-clean the event info */
memset(&e->desc, 0 , sizeof (e->desc));
/* take the lock before we start messing with the ring */
mutex_lock(&cq->rq_lock);
if (!cq->rq.count) {
ice_debug(hw, ICE_DBG_AQ_MSG, "Control Receive queue not initialized.\n" );
ret_code = -EIO;
goto clean_rq_elem_err;
}
/* set next_to_use to head */
ntu = (u16)(rd32(hw, cq->rq.head) & cq->rq.head_mask);
if (ntu == ntc) {
/* nothing to do - shouldn't need to update ring's values */
ret_code = -EALREADY;
goto clean_rq_elem_out;
}
/* now clean the next descriptor */
desc = ICE_CTL_Q_DESC(cq->rq, ntc);
desc_idx = ntc;
rq_last_status = (enum libie_aq_err)le16_to_cpu(desc->retval);
flags = le16_to_cpu(desc->flags);
if (flags & LIBIE_AQ_FLAG_ERR) {
ret_code = -EIO;
ice_debug(hw, ICE_DBG_AQ_MSG, "Control Receive Queue Event 0x%04X received with error 0x%X\n" ,
le16_to_cpu(desc->opcode), rq_last_status);
}
memcpy(&e->desc, desc, sizeof (e->desc));
datalen = le16_to_cpu(desc->datalen);
e->msg_len = min_t(u16, datalen, e->buf_len);
if (e->msg_buf && e->msg_len)
memcpy(e->msg_buf, cq->rq.r.rq_bi[desc_idx].va, e->msg_len);
ice_debug(hw, ICE_DBG_AQ_DESC, "ARQ: desc and buffer:\n" );
ice_debug_cq(hw, cq, (void *)desc, e->msg_buf, cq->rq_buf_size, true );
/* Restore the original datalen and buffer address in the desc,
* FW updates datalen to indicate the event message size
*/
bi = &cq->rq.r.rq_bi[ntc];
memset(desc, 0 , sizeof (*desc));
desc->flags = cpu_to_le16(LIBIE_AQ_FLAG_BUF);
if (cq->rq_buf_size > LIBIE_AQ_LG_BUF)
desc->flags |= cpu_to_le16(LIBIE_AQ_FLAG_LB);
desc->datalen = cpu_to_le16(bi->size);
desc->params.generic.addr_high = cpu_to_le32(upper_32_bits(bi->pa));
desc->params.generic.addr_low = cpu_to_le32(lower_32_bits(bi->pa));
/* set tail = the last cleaned desc index. */
wr32(hw, cq->rq.tail, ntc);
/* ntc is updated to tail + 1 */
ntc++;
if (ntc == cq->num_rq_entries)
ntc = 0 ;
cq->rq.next_to_clean = ntc;
cq->rq.next_to_use = ntu;
clean_rq_elem_out:
/* Set pending if needed, unlock and return */
if (pending) {
/* re-read HW head to calculate actual pending messages */
ntu = (u16)(rd32(hw, cq->rq.head) & cq->rq.head_mask);
*pending = (u16)((ntc > ntu ? cq->rq.count : 0 ) + (ntu - ntc));
}
clean_rq_elem_err:
mutex_unlock(&cq->rq_lock);
return ret_code;
}
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