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linux/linux-5.4.31/drivers/net/ethernet/intel/i40e/i40e_adminq.c

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2024-01-30 10:43:28 +00:00
// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2013 - 2018 Intel Corporation. */
#include "i40e_status.h"
#include "i40e_type.h"
#include "i40e_register.h"
#include "i40e_adminq.h"
#include "i40e_prototype.h"
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 */
if (i40e_is_vf(hw)) {
hw->aq.asq.tail = I40E_VF_ATQT1;
hw->aq.asq.head = I40E_VF_ATQH1;
hw->aq.asq.len = I40E_VF_ATQLEN1;
hw->aq.asq.bal = I40E_VF_ATQBAL1;
hw->aq.asq.bah = I40E_VF_ATQBAH1;
hw->aq.arq.tail = I40E_VF_ARQT1;
hw->aq.arq.head = I40E_VF_ARQH1;
hw->aq.arq.len = I40E_VF_ARQLEN1;
hw->aq.arq.bal = I40E_VF_ARQBAL1;
hw->aq.arq.bah = I40E_VF_ARQBAH1;
} else {
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
**/
static i40e_status i40e_alloc_adminq_asq_ring(struct i40e_hw *hw)
{
i40e_status ret_code;
ret_code = i40e_allocate_dma_mem(hw, &hw->aq.asq.desc_buf,
i40e_mem_atq_ring,
(hw->aq.num_asq_entries *
sizeof(struct i40e_aq_desc)),
I40E_ADMINQ_DESC_ALIGNMENT);
if (ret_code)
return ret_code;
ret_code = i40e_allocate_virt_mem(hw, &hw->aq.asq.cmd_buf,
(hw->aq.num_asq_entries *
sizeof(struct i40e_asq_cmd_details)));
if (ret_code) {
i40e_free_dma_mem(hw, &hw->aq.asq.desc_buf);
return ret_code;
}
return ret_code;
}
/**
* i40e_alloc_adminq_arq_ring - Allocate Admin Queue receive rings
* @hw: pointer to the hardware structure
**/
static i40e_status i40e_alloc_adminq_arq_ring(struct i40e_hw *hw)
{
i40e_status ret_code;
ret_code = i40e_allocate_dma_mem(hw, &hw->aq.arq.desc_buf,
i40e_mem_arq_ring,
(hw->aq.num_arq_entries *
sizeof(struct i40e_aq_desc)),
I40E_ADMINQ_DESC_ALIGNMENT);
return ret_code;
}
/**
* i40e_free_adminq_asq - Free Admin Queue send rings
* @hw: pointer to the hardware structure
*
* This assumes the posted send buffers have already been cleaned
* and de-allocated
**/
static void i40e_free_adminq_asq(struct i40e_hw *hw)
{
i40e_free_dma_mem(hw, &hw->aq.asq.desc_buf);
}
/**
* i40e_free_adminq_arq - Free Admin Queue receive rings
* @hw: pointer to the hardware structure
*
* This assumes the posted receive buffers have already been cleaned
* and de-allocated
**/
static void i40e_free_adminq_arq(struct i40e_hw *hw)
{
i40e_free_dma_mem(hw, &hw->aq.arq.desc_buf);
}
/**
* i40e_alloc_arq_bufs - Allocate pre-posted buffers for the receive queue
* @hw: pointer to the hardware structure
**/
static i40e_status i40e_alloc_arq_bufs(struct i40e_hw *hw)
{
i40e_status ret_code;
struct i40e_aq_desc *desc;
struct i40e_dma_mem *bi;
int i;
/* We'll be allocating the buffer info memory first, then we can
* allocate the mapped buffers for the event processing
*/
/* buffer_info structures do not need alignment */
ret_code = i40e_allocate_virt_mem(hw, &hw->aq.arq.dma_head,
(hw->aq.num_arq_entries * sizeof(struct i40e_dma_mem)));
if (ret_code)
goto alloc_arq_bufs;
hw->aq.arq.r.arq_bi = (struct i40e_dma_mem *)hw->aq.arq.dma_head.va;
/* allocate the mapped buffers */
for (i = 0; i < hw->aq.num_arq_entries; i++) {
bi = &hw->aq.arq.r.arq_bi[i];
ret_code = i40e_allocate_dma_mem(hw, bi,
i40e_mem_arq_buf,
hw->aq.arq_buf_size,
I40E_ADMINQ_DESC_ALIGNMENT);
if (ret_code)
goto unwind_alloc_arq_bufs;
/* now configure the descriptors for use */
desc = I40E_ADMINQ_DESC(hw->aq.arq, i);
desc->flags = cpu_to_le16(I40E_AQ_FLAG_BUF);
if (hw->aq.arq_buf_size > I40E_AQ_LARGE_BUF)
desc->flags |= cpu_to_le16(I40E_AQ_FLAG_LB);
desc->opcode = 0;
/* This is in accordance with Admin queue design, there is no
* register for buffer size configuration
*/
desc->datalen = cpu_to_le16((u16)bi->size);
desc->retval = 0;
desc->cookie_high = 0;
desc->cookie_low = 0;
desc->params.external.addr_high =
cpu_to_le32(upper_32_bits(bi->pa));
desc->params.external.addr_low =
cpu_to_le32(lower_32_bits(bi->pa));
desc->params.external.param0 = 0;
desc->params.external.param1 = 0;
}
alloc_arq_bufs:
return ret_code;
unwind_alloc_arq_bufs:
/* don't try to free the one that failed... */
i--;
for (; i >= 0; i--)
i40e_free_dma_mem(hw, &hw->aq.arq.r.arq_bi[i]);
i40e_free_virt_mem(hw, &hw->aq.arq.dma_head);
return ret_code;
}
/**
* i40e_alloc_asq_bufs - Allocate empty buffer structs for the send queue
* @hw: pointer to the hardware structure
**/
static i40e_status i40e_alloc_asq_bufs(struct i40e_hw *hw)
{
i40e_status ret_code;
struct i40e_dma_mem *bi;
int i;
/* No mapped memory needed yet, just the buffer info structures */
ret_code = i40e_allocate_virt_mem(hw, &hw->aq.asq.dma_head,
(hw->aq.num_asq_entries * sizeof(struct i40e_dma_mem)));
if (ret_code)
goto alloc_asq_bufs;
hw->aq.asq.r.asq_bi = (struct i40e_dma_mem *)hw->aq.asq.dma_head.va;
/* allocate the mapped buffers */
for (i = 0; i < hw->aq.num_asq_entries; i++) {
bi = &hw->aq.asq.r.asq_bi[i];
ret_code = i40e_allocate_dma_mem(hw, bi,
i40e_mem_asq_buf,
hw->aq.asq_buf_size,
I40E_ADMINQ_DESC_ALIGNMENT);
if (ret_code)
goto unwind_alloc_asq_bufs;
}
alloc_asq_bufs:
return ret_code;
unwind_alloc_asq_bufs:
/* don't try to free the one that failed... */
i--;
for (; i >= 0; i--)
i40e_free_dma_mem(hw, &hw->aq.asq.r.asq_bi[i]);
i40e_free_virt_mem(hw, &hw->aq.asq.dma_head);
return ret_code;
}
/**
* i40e_free_arq_bufs - Free receive queue buffer info elements
* @hw: pointer to the hardware structure
**/
static void i40e_free_arq_bufs(struct i40e_hw *hw)
{
int i;
/* free descriptors */
for (i = 0; i < hw->aq.num_arq_entries; i++)
i40e_free_dma_mem(hw, &hw->aq.arq.r.arq_bi[i]);
/* free the descriptor memory */
i40e_free_dma_mem(hw, &hw->aq.arq.desc_buf);
/* free the dma header */
i40e_free_virt_mem(hw, &hw->aq.arq.dma_head);
}
/**
* i40e_free_asq_bufs - Free send queue buffer info elements
* @hw: pointer to the hardware structure
**/
static void i40e_free_asq_bufs(struct i40e_hw *hw)
{
int i;
/* only unmap if the address is non-NULL */
for (i = 0; i < hw->aq.num_asq_entries; i++)
if (hw->aq.asq.r.asq_bi[i].pa)
i40e_free_dma_mem(hw, &hw->aq.asq.r.asq_bi[i]);
/* free the buffer info list */
i40e_free_virt_mem(hw, &hw->aq.asq.cmd_buf);
/* free the descriptor memory */
i40e_free_dma_mem(hw, &hw->aq.asq.desc_buf);
/* free the dma header */
i40e_free_virt_mem(hw, &hw->aq.asq.dma_head);
}
/**
* i40e_config_asq_regs - configure ASQ registers
* @hw: pointer to the hardware structure
*
* Configure base address and length registers for the transmit queue
**/
static i40e_status i40e_config_asq_regs(struct i40e_hw *hw)
{
i40e_status ret_code = 0;
u32 reg = 0;
/* Clear Head and Tail */
wr32(hw, hw->aq.asq.head, 0);
wr32(hw, hw->aq.asq.tail, 0);
/* set starting point */
wr32(hw, hw->aq.asq.len, (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));
/* Check one register to verify that config was applied */
reg = rd32(hw, hw->aq.asq.bal);
if (reg != lower_32_bits(hw->aq.asq.desc_buf.pa))
ret_code = I40E_ERR_ADMIN_QUEUE_ERROR;
return ret_code;
}
/**
* i40e_config_arq_regs - ARQ register configuration
* @hw: pointer to the hardware structure
*
* Configure base address and length registers for the receive (event queue)
**/
static i40e_status i40e_config_arq_regs(struct i40e_hw *hw)
{
i40e_status ret_code = 0;
u32 reg = 0;
/* Clear Head and Tail */
wr32(hw, hw->aq.arq.head, 0);
wr32(hw, hw->aq.arq.tail, 0);
/* set starting point */
wr32(hw, hw->aq.arq.len, (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));
/* Update tail in the HW to post pre-allocated buffers */
wr32(hw, hw->aq.arq.tail, hw->aq.num_arq_entries - 1);
/* Check one register to verify that config was applied */
reg = rd32(hw, hw->aq.arq.bal);
if (reg != lower_32_bits(hw->aq.arq.desc_buf.pa))
ret_code = I40E_ERR_ADMIN_QUEUE_ERROR;
return ret_code;
}
/**
* i40e_init_asq - main initialization routine for ASQ
* @hw: pointer to the hardware structure
*
* This is the main initialization routine for the Admin Send Queue
* Prior to calling this function, drivers *MUST* set the following fields
* in the hw->aq structure:
* - hw->aq.num_asq_entries
* - hw->aq.arq_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 i40e_status i40e_init_asq(struct i40e_hw *hw)
{
i40e_status ret_code = 0;
if (hw->aq.asq.count > 0) {
/* queue already initialized */
ret_code = I40E_ERR_NOT_READY;
goto init_adminq_exit;
}
/* verify input for valid configuration */
if ((hw->aq.num_asq_entries == 0) ||
(hw->aq.asq_buf_size == 0)) {
ret_code = I40E_ERR_CONFIG;
goto init_adminq_exit;
}
hw->aq.asq.next_to_use = 0;
hw->aq.asq.next_to_clean = 0;
/* allocate the ring memory */
ret_code = i40e_alloc_adminq_asq_ring(hw);
if (ret_code)
goto init_adminq_exit;
/* allocate buffers in the rings */
ret_code = i40e_alloc_asq_bufs(hw);
if (ret_code)
goto init_adminq_free_rings;
/* initialize base registers */
ret_code = i40e_config_asq_regs(hw);
if (ret_code)
goto init_adminq_free_rings;
/* success! */
hw->aq.asq.count = hw->aq.num_asq_entries;
goto init_adminq_exit;
init_adminq_free_rings:
i40e_free_adminq_asq(hw);
init_adminq_exit:
return ret_code;
}
/**
* i40e_init_arq - initialize ARQ
* @hw: pointer to the hardware structure
*
* The main initialization routine for the Admin Receive (Event) Queue.
* Prior to calling this function, drivers *MUST* set the following fields
* in the hw->aq structure:
* - hw->aq.num_asq_entries
* - hw->aq.arq_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 i40e_status i40e_init_arq(struct i40e_hw *hw)
{
i40e_status ret_code = 0;
if (hw->aq.arq.count > 0) {
/* queue already initialized */
ret_code = I40E_ERR_NOT_READY;
goto init_adminq_exit;
}
/* verify input for valid configuration */
if ((hw->aq.num_arq_entries == 0) ||
(hw->aq.arq_buf_size == 0)) {
ret_code = I40E_ERR_CONFIG;
goto init_adminq_exit;
}
hw->aq.arq.next_to_use = 0;
hw->aq.arq.next_to_clean = 0;
/* allocate the ring memory */
ret_code = i40e_alloc_adminq_arq_ring(hw);
if (ret_code)
goto init_adminq_exit;
/* allocate buffers in the rings */
ret_code = i40e_alloc_arq_bufs(hw);
if (ret_code)
goto init_adminq_free_rings;
/* initialize base registers */
ret_code = i40e_config_arq_regs(hw);
if (ret_code)
goto init_adminq_free_rings;
/* success! */
hw->aq.arq.count = hw->aq.num_arq_entries;
goto init_adminq_exit;
init_adminq_free_rings:
i40e_free_adminq_arq(hw);
init_adminq_exit:
return ret_code;
}
/**
* i40e_shutdown_asq - shutdown the ASQ
* @hw: pointer to the hardware structure
*
* The main shutdown routine for the Admin Send Queue
**/
static i40e_status i40e_shutdown_asq(struct i40e_hw *hw)
{
i40e_status ret_code = 0;
mutex_lock(&hw->aq.asq_mutex);
if (hw->aq.asq.count == 0) {
ret_code = I40E_ERR_NOT_READY;
goto shutdown_asq_out;
}
/* 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);
hw->aq.asq.count = 0; /* to indicate uninitialized queue */
/* free ring buffers */
i40e_free_asq_bufs(hw);
shutdown_asq_out:
mutex_unlock(&hw->aq.asq_mutex);
return ret_code;
}
/**
* i40e_shutdown_arq - shutdown ARQ
* @hw: pointer to the hardware structure
*
* The main shutdown routine for the Admin Receive Queue
**/
static i40e_status i40e_shutdown_arq(struct i40e_hw *hw)
{
i40e_status ret_code = 0;
mutex_lock(&hw->aq.arq_mutex);
if (hw->aq.arq.count == 0) {
ret_code = I40E_ERR_NOT_READY;
goto shutdown_arq_out;
}
/* 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);
hw->aq.arq.count = 0; /* to indicate uninitialized queue */
/* free ring buffers */
i40e_free_arq_bufs(hw);
shutdown_arq_out:
mutex_unlock(&hw->aq.arq_mutex);
return ret_code;
}
/**
* i40e_init_adminq - main initialization routine for Admin Queue
* @hw: pointer to the hardware structure
*
* Prior to calling this function, drivers *MUST* set the following fields
* in the hw->aq structure:
* - hw->aq.num_asq_entries
* - hw->aq.num_arq_entries
* - hw->aq.arq_buf_size
* - hw->aq.asq_buf_size
**/
i40e_status i40e_init_adminq(struct i40e_hw *hw)
{
u16 cfg_ptr, oem_hi, oem_lo;
u16 eetrack_lo, eetrack_hi;
i40e_status ret_code;
int retry = 0;
/* verify input for valid configuration */
if ((hw->aq.num_arq_entries == 0) ||
(hw->aq.num_asq_entries == 0) ||
(hw->aq.arq_buf_size == 0) ||
(hw->aq.asq_buf_size == 0)) {
ret_code = I40E_ERR_CONFIG;
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;
/* allocate the ASQ */
ret_code = i40e_init_asq(hw);
if (ret_code)
goto init_adminq_destroy_locks;
/* allocate the ARQ */
ret_code = i40e_init_arq(hw);
if (ret_code)
goto init_adminq_free_asq;
/* There are some cases where the firmware may not be quite ready
* for AdminQ operations, so we retry the AdminQ setup a few times
* if we see timeouts in this first AQ call.
*/
do {
ret_code = i40e_aq_get_firmware_version(hw,
&hw->aq.fw_maj_ver,
&hw->aq.fw_min_ver,
&hw->aq.fw_build,
&hw->aq.api_maj_ver,
&hw->aq.api_min_ver,
NULL);
if (ret_code != I40E_ERR_ADMIN_QUEUE_TIMEOUT)
break;
retry++;
msleep(100);
i40e_resume_aq(hw);
} while (retry < 10);
if (ret_code != I40E_SUCCESS)
goto init_adminq_free_arq;
/* get the NVM version info */
i40e_read_nvm_word(hw, I40E_SR_NVM_DEV_STARTER_VERSION,
&hw->nvm.version);
i40e_read_nvm_word(hw, I40E_SR_NVM_EETRACK_LO, &eetrack_lo);
i40e_read_nvm_word(hw, I40E_SR_NVM_EETRACK_HI, &eetrack_hi);
hw->nvm.eetrack = (eetrack_hi << 16) | eetrack_lo;
i40e_read_nvm_word(hw, I40E_SR_BOOT_CONFIG_PTR, &cfg_ptr);
i40e_read_nvm_word(hw, (cfg_ptr + I40E_NVM_OEM_VER_OFF),
&oem_hi);
i40e_read_nvm_word(hw, (cfg_ptr + (I40E_NVM_OEM_VER_OFF + 1)),
&oem_lo);
hw->nvm.oem_ver = ((u32)oem_hi << 16) | oem_lo;
if (hw->mac.type == I40E_MAC_XL710 &&
hw->aq.api_maj_ver == I40E_FW_API_VERSION_MAJOR &&
hw->aq.api_min_ver >= I40E_MINOR_VER_GET_LINK_INFO_XL710) {
hw->flags |= I40E_HW_FLAG_AQ_PHY_ACCESS_CAPABLE;
hw->flags |= I40E_HW_FLAG_FW_LLDP_STOPPABLE;
}
if (hw->mac.type == I40E_MAC_X722 &&
hw->aq.api_maj_ver == I40E_FW_API_VERSION_MAJOR &&
hw->aq.api_min_ver >= I40E_MINOR_VER_FW_LLDP_STOPPABLE_X722) {
hw->flags |= I40E_HW_FLAG_FW_LLDP_STOPPABLE;
}
/* Newer versions of firmware require lock when reading the NVM */
if (hw->aq.api_maj_ver > 1 ||
(hw->aq.api_maj_ver == 1 &&
hw->aq.api_min_ver >= 5))
hw->flags |= I40E_HW_FLAG_NVM_READ_REQUIRES_LOCK;
/* The ability to RX (not drop) 802.1ad frames was added in API 1.7 */
if (hw->aq.api_maj_ver > 1 ||
(hw->aq.api_maj_ver == 1 &&
hw->aq.api_min_ver >= 7))
hw->flags |= I40E_HW_FLAG_802_1AD_CAPABLE;
if (hw->aq.api_maj_ver > 1 ||
(hw->aq.api_maj_ver == 1 &&
hw->aq.api_min_ver >= 8)) {
hw->flags |= I40E_HW_FLAG_FW_LLDP_PERSISTENT;
hw->flags |= I40E_HW_FLAG_DROP_MODE;
}
if (hw->aq.api_maj_ver > I40E_FW_API_VERSION_MAJOR) {
ret_code = I40E_ERR_FIRMWARE_API_VERSION;
goto init_adminq_free_arq;
}
/* pre-emptive resource lock release */
i40e_aq_release_resource(hw, I40E_NVM_RESOURCE_ID, 0, NULL);
hw->nvm_release_on_done = false;
hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
ret_code = 0;
/* success! */
goto init_adminq_exit;
init_adminq_free_arq:
i40e_shutdown_arq(hw);
init_adminq_free_asq:
i40e_shutdown_asq(hw);
init_adminq_destroy_locks:
init_adminq_exit:
return ret_code;
}
/**
* i40e_shutdown_adminq - shutdown routine for the Admin Queue
* @hw: pointer to the hardware structure
**/
i40e_status i40e_shutdown_adminq(struct i40e_hw *hw)
{
i40e_status ret_code = 0;
if (i40e_check_asq_alive(hw))
i40e_aq_queue_shutdown(hw, true);
i40e_shutdown_asq(hw);
i40e_shutdown_arq(hw);
if (hw->nvm_buff.va)
i40e_free_virt_mem(hw, &hw->nvm_buff);
return ret_code;
}
/**
* i40e_clean_asq - cleans Admin send queue
* @hw: pointer to the hardware structure
*
* returns the number of free desc
**/
static u16 i40e_clean_asq(struct i40e_hw *hw)
{
struct i40e_adminq_ring *asq = &(hw->aq.asq);
struct i40e_asq_cmd_details *details;
u16 ntc = asq->next_to_clean;
struct i40e_aq_desc desc_cb;
struct i40e_aq_desc *desc;
desc = I40E_ADMINQ_DESC(*asq, ntc);
details = I40E_ADMINQ_DETAILS(*asq, ntc);
while (rd32(hw, hw->aq.asq.head) != ntc) {
i40e_debug(hw, I40E_DEBUG_AQ_COMMAND,
"ntc %d head %d.\n", ntc, rd32(hw, hw->aq.asq.head));
if (details->callback) {
I40E_ADMINQ_CALLBACK cb_func =
(I40E_ADMINQ_CALLBACK)details->callback;
desc_cb = *desc;
cb_func(hw, &desc_cb);
}
memset(desc, 0, sizeof(*desc));
memset(details, 0, sizeof(*details));
ntc++;
if (ntc == asq->count)
ntc = 0;
desc = I40E_ADMINQ_DESC(*asq, ntc);
details = I40E_ADMINQ_DETAILS(*asq, ntc);
}
asq->next_to_clean = ntc;
return I40E_DESC_UNUSED(asq);
}
/**
* i40e_asq_done - check if FW has processed the Admin Send Queue
* @hw: pointer to the hw struct
*
* Returns true if the firmware has processed all descriptors on the
* admin send queue. Returns false if there are still requests pending.
**/
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;
}
/**
* i40e_asq_send_command - send command to Admin Queue
* @hw: pointer to the hw struct
* @desc: prefilled descriptor describing the command (non DMA mem)
* @buff: buffer to use for indirect commands
* @buff_size: size of buffer for indirect commands
* @cmd_details: pointer to command details structure
*
* This is the main send command driver routine for the Admin Queue send
* queue. It runs the queue, cleans the queue, etc
**/
i40e_status i40e_asq_send_command(struct i40e_hw *hw,
struct i40e_aq_desc *desc,
void *buff, /* can be NULL */
u16 buff_size,
struct i40e_asq_cmd_details *cmd_details)
{
i40e_status status = 0;
struct i40e_dma_mem *dma_buff = NULL;
struct i40e_asq_cmd_details *details;
struct i40e_aq_desc *desc_on_ring;
bool cmd_completed = false;
u16 retval = 0;
u32 val = 0;
mutex_lock(&hw->aq.asq_mutex);
if (hw->aq.asq.count == 0) {
i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
"AQTX: Admin queue not initialized.\n");
status = I40E_ERR_QUEUE_EMPTY;
goto asq_send_command_error;
}
hw->aq.asq_last_status = I40E_AQ_RC_OK;
val = rd32(hw, hw->aq.asq.head);
if (val >= hw->aq.num_asq_entries) {
i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
"AQTX: head overrun at %d\n", val);
status = I40E_ERR_ADMIN_QUEUE_FULL;
goto asq_send_command_error;
}
details = I40E_ADMINQ_DETAILS(hw->aq.asq, hw->aq.asq.next_to_use);
if (cmd_details) {
*details = *cmd_details;
/* If the cmd_details are defined copy the cookie. The
* cpu_to_le32 is not needed here because the data is ignored
* by the FW, only used by the driver
*/
if (details->cookie) {
desc->cookie_high =
cpu_to_le32(upper_32_bits(details->cookie));
desc->cookie_low =
cpu_to_le32(lower_32_bits(details->cookie));
}
} else {
memset(details, 0, sizeof(struct i40e_asq_cmd_details));
}
/* clear requested flags and then set additional flags if defined */
desc->flags &= ~cpu_to_le16(details->flags_dis);
desc->flags |= cpu_to_le16(details->flags_ena);
if (buff_size > hw->aq.asq_buf_size) {
i40e_debug(hw,
I40E_DEBUG_AQ_MESSAGE,
"AQTX: Invalid buffer size: %d.\n",
buff_size);
status = I40E_ERR_INVALID_SIZE;
goto asq_send_command_error;
}
if (details->postpone && !details->async) {
i40e_debug(hw,
I40E_DEBUG_AQ_MESSAGE,
"AQTX: Async flag not set along with postpone flag");
status = I40E_ERR_PARAM;
goto asq_send_command_error;
}
/* call clean and check queue available function to reclaim the
* descriptors that were processed by FW, 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 (i40e_clean_asq(hw) == 0) {
i40e_debug(hw,
I40E_DEBUG_AQ_MESSAGE,
"AQTX: Error queue is full.\n");
status = I40E_ERR_ADMIN_QUEUE_FULL;
goto asq_send_command_error;
}
/* initialize the temp desc pointer with the right desc */
desc_on_ring = I40E_ADMINQ_DESC(hw->aq.asq, hw->aq.asq.next_to_use);
/* if the desc is available copy the temp desc to the right place */
*desc_on_ring = *desc;
/* if buff is not NULL assume indirect command */
if (buff != NULL) {
dma_buff = &(hw->aq.asq.r.asq_bi[hw->aq.asq.next_to_use]);
/* copy the user buff into the respective DMA buff */
memcpy(dma_buff->va, buff, buff_size);
desc_on_ring->datalen = cpu_to_le16(buff_size);
/* Update the address values in the desc with the pa value
* for respective buffer
*/
desc_on_ring->params.external.addr_high =
cpu_to_le32(upper_32_bits(dma_buff->pa));
desc_on_ring->params.external.addr_low =
cpu_to_le32(lower_32_bits(dma_buff->pa));
}
/* bump the tail */
i40e_debug(hw, I40E_DEBUG_AQ_COMMAND, "AQTX: desc and buffer:\n");
i40e_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc_on_ring,
buff, buff_size);
(hw->aq.asq.next_to_use)++;
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);
/* if cmd_details are not defined or async flag is not set,
* we need to wait for desc write back
*/
if (!details->async && !details->postpone) {
u32 total_delay = 0;
do {
/* AQ designers suggest use of head for better
* timing reliability than DD bit
*/
if (i40e_asq_done(hw))
break;
udelay(50);
total_delay += 50;
} while (total_delay < hw->aq.asq_cmd_timeout);
}
/* if ready, copy the desc back to temp */
if (i40e_asq_done(hw)) {
*desc = *desc_on_ring;
if (buff != NULL)
memcpy(buff, dma_buff->va, buff_size);
retval = le16_to_cpu(desc->retval);
if (retval != 0) {
i40e_debug(hw,
I40E_DEBUG_AQ_MESSAGE,
"AQTX: Command completed with error 0x%X.\n",
retval);
/* strip off FW internal code */
retval &= 0xff;
}
cmd_completed = true;
if ((enum i40e_admin_queue_err)retval == I40E_AQ_RC_OK)
status = 0;
else if ((enum i40e_admin_queue_err)retval == I40E_AQ_RC_EBUSY)
status = I40E_ERR_NOT_READY;
else
status = I40E_ERR_ADMIN_QUEUE_ERROR;
hw->aq.asq_last_status = (enum i40e_admin_queue_err)retval;
}
i40e_debug(hw, I40E_DEBUG_AQ_COMMAND,
"AQTX: desc and buffer writeback:\n");
i40e_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc, buff, buff_size);
/* save writeback aq if requested */
if (details->wb_desc)
*details->wb_desc = *desc_on_ring;
/* 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) {
i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
"AQTX: AQ Critical error.\n");
status = I40E_ERR_ADMIN_QUEUE_CRITICAL_ERROR;
} else {
i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
"AQTX: Writeback timeout.\n");
status = I40E_ERR_ADMIN_QUEUE_TIMEOUT;
}
}
asq_send_command_error:
mutex_unlock(&hw->aq.asq_mutex);
return status;
}
/**
* i40e_fill_default_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 i40e_fill_default_direct_cmd_desc(struct i40e_aq_desc *desc,
u16 opcode)
{
/* zero out the desc */
memset((void *)desc, 0, sizeof(struct i40e_aq_desc));
desc->opcode = cpu_to_le16(opcode);
desc->flags = cpu_to_le16(I40E_AQ_FLAG_SI);
}
/**
* i40e_clean_arq_element
* @hw: pointer to the hw struct
* @e: event info from the receive descriptor, includes any buffers
* @pending: number of events that could be left to process
*
* This function cleans one Admin Receive Queue element and returns
* the contents through e. It can also return how many events are
* left to process through 'pending'
**/
i40e_status i40e_clean_arq_element(struct i40e_hw *hw,
struct i40e_arq_event_info *e,
u16 *pending)
{
i40e_status ret_code = 0;
u16 ntc = hw->aq.arq.next_to_clean;
struct i40e_aq_desc *desc;
struct i40e_dma_mem *bi;
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(&hw->aq.arq_mutex);
if (hw->aq.arq.count == 0) {
i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
"AQRX: Admin queue not initialized.\n");
ret_code = I40E_ERR_QUEUE_EMPTY;
goto clean_arq_element_err;
}
/* set next_to_use to head */
ntu = rd32(hw, hw->aq.arq.head) & I40E_PF_ARQH_ARQH_MASK;
if (ntu == ntc) {
/* nothing to do - shouldn't need to update ring's values */
ret_code = I40E_ERR_ADMIN_QUEUE_NO_WORK;
goto clean_arq_element_out;
}
/* now clean the next descriptor */
desc = I40E_ADMINQ_DESC(hw->aq.arq, ntc);
desc_idx = ntc;
hw->aq.arq_last_status =
(enum i40e_admin_queue_err)le16_to_cpu(desc->retval);
flags = le16_to_cpu(desc->flags);
if (flags & I40E_AQ_FLAG_ERR) {
ret_code = I40E_ERR_ADMIN_QUEUE_ERROR;
i40e_debug(hw,
I40E_DEBUG_AQ_MESSAGE,
"AQRX: Event received with error 0x%X.\n",
hw->aq.arq_last_status);
}
e->desc = *desc;
datalen = le16_to_cpu(desc->datalen);
e->msg_len = min(datalen, e->buf_len);
if (e->msg_buf != NULL && (e->msg_len != 0))
memcpy(e->msg_buf, hw->aq.arq.r.arq_bi[desc_idx].va,
e->msg_len);
i40e_debug(hw, I40E_DEBUG_AQ_COMMAND, "AQRX: desc and buffer:\n");
i40e_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc, e->msg_buf,
hw->aq.arq_buf_size);
/* Restore the original datalen and buffer address in the desc,
* FW updates datalen to indicate the event message
* size
*/
bi = &hw->aq.arq.r.arq_bi[ntc];
memset((void *)desc, 0, sizeof(struct i40e_aq_desc));
desc->flags = cpu_to_le16(I40E_AQ_FLAG_BUF);
if (hw->aq.arq_buf_size > I40E_AQ_LARGE_BUF)
desc->flags |= cpu_to_le16(I40E_AQ_FLAG_LB);
desc->datalen = cpu_to_le16((u16)bi->size);
desc->params.external.addr_high = cpu_to_le32(upper_32_bits(bi->pa));
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);
/* ntc is updated to tail + 1 */
ntc++;
if (ntc == hw->aq.num_arq_entries)
ntc = 0;
hw->aq.arq.next_to_clean = ntc;
hw->aq.arq.next_to_use = ntu;
i40e_nvmupd_check_wait_event(hw, le16_to_cpu(e->desc.opcode), &e->desc);
clean_arq_element_out:
/* Set pending if needed, unlock and return */
if (pending)
*pending = (ntc > ntu ? hw->aq.arq.count : 0) + (ntu - ntc);
clean_arq_element_err:
mutex_unlock(&hw->aq.arq_mutex);
return ret_code;
}
static void i40e_resume_aq(struct i40e_hw *hw)
{
/* Registers are reset after PF reset */
hw->aq.asq.next_to_use = 0;
hw->aq.asq.next_to_clean = 0;
i40e_config_asq_regs(hw);
hw->aq.arq.next_to_use = 0;
hw->aq.arq.next_to_clean = 0;
i40e_config_arq_regs(hw);
}