/**
* i40e_write_dword - replace HMC context dword
* @hmc_bits: pointer to the HMC memory
* @ce_info: a description of the struct to be read from
* @src: the struct to be read from
**/
static void i40e_write_dword(u8 *hmc_bits,
struct i40e_context_ele *ce_info,
u8 *src)
{
u32 src_dword, mask;
u8 *from, *dest;
u16 shift_width;
__le32 dest_dword;
/* copy from the next struct field */
from = src + ce_info->offset;
/* prepare the bits and mask */
shift_width = ce_info->lsb % 8;
/* if the field width is exactly 32 on an x86 machine, then the shift
* operation will not work because the SHL instructions count is masked
* to 5 bits so the shift will do nothing
*/
if (ce_info->width < 32)
mask = ((u32)1 << ce_info->width) - 1;
else
mask = ~(u32)0;
/* don't swizzle the bits until after the mask because the mask bits
* will be in a different bit position on big endian machines
*/
src_dword = *(u32 *)from;
src_dword &= mask;
/* shift to correct alignment */
mask <<= shift_width;
src_dword <<= shift_width;
/* get the current bits from the target bit string */
dest = hmc_bits + (ce_info->lsb / 8);
i40e_memcpy(&dest_dword, dest, sizeof(dest_dword), I40E_DMA_TO_NONDMA);
dest_dword &= ~(CPU_TO_LE32(mask)); /* get the bits not changing */
dest_dword |= CPU_TO_LE32(src_dword); /* add in the new bits */
/* put it all back */
i40e_memcpy(dest, &dest_dword, sizeof(dest_dword), I40E_NONDMA_TO_DMA);
}
/**
* i40e_read_word - read HMC context word into struct
* @hmc_bits: pointer to the HMC memory
* @ce_info: a description of the struct to be filled
* @dest: the struct to be filled
**/
static void i40e_read_word(u8 *hmc_bits,
struct i40e_context_ele *ce_info,
u8 *dest)
{
u16 dest_word, mask;
u8 *src, *target;
u16 shift_width;
__le16 src_word;
/* prepare the bits and mask */
shift_width = ce_info->lsb % 8;
mask = ((u16)1 << ce_info->width) - 1;
/* shift to correct alignment */
mask <<= shift_width;
/* get the current bits from the src bit string */
src = hmc_bits + (ce_info->lsb / 8);
i40e_memcpy(&src_word, src, sizeof(src_word), I40E_DMA_TO_NONDMA);
/* the data in the memory is stored as little endian so mask it
* correctly
*/
src_word &= ~(CPU_TO_LE16(mask));
/* get the data back into host order before shifting */
dest_word = LE16_TO_CPU(src_word);
dest_word >>= shift_width;
/* get the address from the struct field */
target = dest + ce_info->offset;
/* put it back in the struct */
i40e_memcpy(target, &dest_word, sizeof(dest_word), I40E_NONDMA_TO_DMA);
}
/**
* i40e_write_word - replace HMC context word
* @hmc_bits: pointer to the HMC memory
* @ce_info: a description of the struct to be read from
* @src: the struct to be read from
**/
static void i40e_write_word(u8 *hmc_bits,
struct i40e_context_ele *ce_info,
u8 *src)
{
u16 src_word, mask;
u8 *from, *dest;
u16 shift_width;
__le16 dest_word;
/* copy from the next struct field */
from = src + ce_info->offset;
/* prepare the bits and mask */
shift_width = ce_info->lsb % 8;
mask = ((u16)1 << ce_info->width) - 1;
/* don't swizzle the bits until after the mask because the mask bits
* will be in a different bit position on big endian machines
*/
src_word = *(u16 *)from;
src_word &= mask;
/* shift to correct alignment */
mask <<= shift_width;
src_word <<= shift_width;
/* get the current bits from the target bit string */
dest = hmc_bits + (ce_info->lsb / 8);
i40e_memcpy(&dest_word, dest, sizeof(dest_word), I40E_DMA_TO_NONDMA);
dest_word &= ~(CPU_TO_LE16(mask)); /* get the bits not changing */
dest_word |= CPU_TO_LE16(src_word); /* add in the new bits */
/* put it all back */
i40e_memcpy(dest, &dest_word, sizeof(dest_word), I40E_NONDMA_TO_DMA);
}
/**
* 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
**/
enum i40e_status_code 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)
{
enum i40e_status_code status = I40E_SUCCESS;
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;
i40e_acquire_spinlock(&hw->aq.asq_spinlock);
hw->aq.asq_last_status = I40E_AQ_RC_OK;
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;
}
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_QUEUE_EMPTY;
goto asq_send_command_error;
}
details = I40E_ADMINQ_DETAILS(hw->aq.asq, hw->aq.asq.next_to_use);
if (cmd_details) {
i40e_memcpy(details,
cmd_details,
sizeof(struct i40e_asq_cmd_details),
I40E_NONDMA_TO_NONDMA);
/* 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(I40E_HI_DWORD(details->cookie));
desc->cookie_low =
CPU_TO_LE32(I40E_LO_DWORD(details->cookie));
}
} else {
i40e_memset(details, 0,
sizeof(struct i40e_asq_cmd_details),
I40E_NONDMA_MEM);
}
/* 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 */
i40e_memcpy(desc_on_ring, desc, sizeof(struct i40e_aq_desc),
I40E_NONDMA_TO_DMA);
/* 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 */
i40e_memcpy(dma_buff->va, buff, buff_size,
I40E_NONDMA_TO_DMA);
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(I40E_HI_DWORD(dma_buff->pa));
desc_on_ring->params.external.addr_low =
CPU_TO_LE32(I40E_LO_DWORD(dma_buff->pa));
}
/* bump the tail */
i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, "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;
i40e_usec_delay(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)) {
i40e_memcpy(desc, desc_on_ring, sizeof(struct i40e_aq_desc),
I40E_DMA_TO_NONDMA);
if (buff != NULL)
i40e_memcpy(buff, dma_buff->va, buff_size,
I40E_DMA_TO_NONDMA);
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 = I40E_SUCCESS;
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_MESSAGE,
"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)
i40e_memcpy(details->wb_desc, desc_on_ring,
sizeof(struct i40e_aq_desc), I40E_DMA_TO_NONDMA);
/* update the error if time out occurred */
if ((!cmd_completed) &&
(!details->async && !details->postpone)) {
#ifdef PF_DRIVER
if (rd32(hw, hw->aq.asq.len) & I40E_GL_ATQLEN_ATQCRIT_MASK) {
#else
if (rd32(hw, hw->aq.asq.len) & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
#endif
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:
i40e_release_spinlock(&hw->aq.asq_spinlock);
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 */
i40e_memset((void *)desc, 0, sizeof(struct i40e_aq_desc),
I40E_NONDMA_MEM);
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'
**/
enum i40e_status_code i40e_clean_arq_element(struct i40e_hw *hw,
struct i40e_arq_event_info *e,
u16 *pending)
{
enum i40e_status_code ret_code = I40E_SUCCESS;
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 */
i40e_memset(&e->desc, 0, sizeof(e->desc), I40E_NONDMA_MEM);
/* take the lock before we start messing with the ring */
i40e_acquire_spinlock(&hw->aq.arq_spinlock);
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 */
#ifdef INTEGRATED_VF
if (!i40e_is_vf(hw))
ntu = rd32(hw, hw->aq.arq.head) & I40E_PF_ARQH_ARQH_MASK;
else
ntu = rd32(hw, hw->aq.arq.head) & I40E_VF_ARQH1_ARQH_MASK;
#else
#ifdef PF_DRIVER
ntu = rd32(hw, hw->aq.arq.head) & I40E_PF_ARQH_ARQH_MASK;
#endif /* PF_DRIVER */
#ifdef VF_DRIVER
ntu = rd32(hw, hw->aq.arq.head) & I40E_VF_ARQH1_ARQH_MASK;
#endif /* VF_DRIVER */
#endif /* INTEGRATED_VF */
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);
}
i40e_memcpy(&e->desc, desc, sizeof(struct i40e_aq_desc),
I40E_DMA_TO_NONDMA);
datalen = LE16_TO_CPU(desc->datalen);
e->msg_len = min(datalen, e->buf_len);
if (e->msg_buf != NULL && (e->msg_len != 0))
i40e_memcpy(e->msg_buf,
hw->aq.arq.r.arq_bi[desc_idx].va,
e->msg_len, I40E_DMA_TO_NONDMA);
i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, "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];
i40e_memset((void *)desc, 0, sizeof(struct i40e_aq_desc), I40E_DMA_MEM);
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(I40E_HI_DWORD(bi->pa));
desc->params.external.addr_low = CPU_TO_LE32(I40E_LO_DWORD(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;
#ifdef PF_DRIVER
i40e_nvmupd_check_wait_event(hw, LE16_TO_CPU(e->desc.opcode), &e->desc);
#endif /* PF_DRIVER */
clean_arq_element_out:
/* Set pending if needed, unlock and return */
if (pending != NULL)
*pending = (ntc > ntu ? hw->aq.arq.count : 0) + (ntu - ntc);
clean_arq_element_err:
i40e_release_spinlock(&hw->aq.arq_spinlock);
return ret_code;
}
/**
* i40e_add_sd_table_entry - Adds a segment descriptor to the table
* @hw: pointer to our hw struct
* @hmc_info: pointer to the HMC configuration information struct
* @sd_index: segment descriptor index to manipulate
* @type: what type of segment descriptor we're manipulating
* @direct_mode_sz: size to alloc in direct mode
**/
enum i40e_status_code i40e_add_sd_table_entry(struct i40e_hw *hw,
struct i40e_hmc_info *hmc_info,
u32 sd_index,
enum i40e_sd_entry_type type,
u64 direct_mode_sz)
{
enum i40e_status_code ret_code = I40E_SUCCESS;
struct i40e_hmc_sd_entry *sd_entry;
enum i40e_memory_type mem_type;
bool dma_mem_alloc_done = false;
struct i40e_dma_mem mem;
u64 alloc_len;
if (NULL == hmc_info->sd_table.sd_entry) {
ret_code = I40E_ERR_BAD_PTR;
DEBUGOUT("i40e_add_sd_table_entry: bad sd_entry\n");
goto exit;
}
if (sd_index >= hmc_info->sd_table.sd_cnt) {
ret_code = I40E_ERR_INVALID_SD_INDEX;
DEBUGOUT("i40e_add_sd_table_entry: bad sd_index\n");
goto exit;
}
sd_entry = &hmc_info->sd_table.sd_entry[sd_index];
if (!sd_entry->valid) {
if (I40E_SD_TYPE_PAGED == type) {
mem_type = i40e_mem_pd;
alloc_len = I40E_HMC_PAGED_BP_SIZE;
} else {
mem_type = i40e_mem_bp_jumbo;
alloc_len = direct_mode_sz;
}
/* allocate a 4K pd page or 2M backing page */
ret_code = i40e_allocate_dma_mem(hw, &mem, mem_type, alloc_len,
I40E_HMC_PD_BP_BUF_ALIGNMENT);
if (ret_code)
goto exit;
dma_mem_alloc_done = true;
if (I40E_SD_TYPE_PAGED == type) {
ret_code = i40e_allocate_virt_mem(hw,
&sd_entry->u.pd_table.pd_entry_virt_mem,
sizeof(struct i40e_hmc_pd_entry) * 512);
if (ret_code)
goto exit;
sd_entry->u.pd_table.pd_entry =
(struct i40e_hmc_pd_entry *)
sd_entry->u.pd_table.pd_entry_virt_mem.va;
i40e_memcpy(&sd_entry->u.pd_table.pd_page_addr,
&mem, sizeof(struct i40e_dma_mem),
I40E_NONDMA_TO_NONDMA);
} else {
i40e_memcpy(&sd_entry->u.bp.addr,
&mem, sizeof(struct i40e_dma_mem),
I40E_NONDMA_TO_NONDMA);
sd_entry->u.bp.sd_pd_index = sd_index;
}
/* initialize the sd entry */
hmc_info->sd_table.sd_entry[sd_index].entry_type = type;
/* increment the ref count */
I40E_INC_SD_REFCNT(&hmc_info->sd_table);
}
/* Increment backing page reference count */
if (I40E_SD_TYPE_DIRECT == sd_entry->entry_type)
I40E_INC_BP_REFCNT(&sd_entry->u.bp);
exit:
if (I40E_SUCCESS != ret_code)
if (dma_mem_alloc_done)
i40e_free_dma_mem(hw, &mem);
return ret_code;
}
/**
* i40e_add_pd_table_entry - Adds page descriptor to the specified table
* @hw: pointer to our HW structure
* @hmc_info: pointer to the HMC configuration information structure
* @pd_index: which page descriptor index to manipulate
* @rsrc_pg: if not NULL, use preallocated page instead of allocating new one.
*
* This function:
* 1. Initializes the pd entry
* 2. Adds pd_entry in the pd_table
* 3. Mark the entry valid in i40e_hmc_pd_entry structure
* 4. Initializes the pd_entry's ref count to 1
* assumptions:
* 1. The memory for pd should be pinned down, physically contiguous and
* aligned on 4K boundary and zeroed memory.
* 2. It should be 4K in size.
**/
enum i40e_status_code i40e_add_pd_table_entry(struct i40e_hw *hw,
struct i40e_hmc_info *hmc_info,
u32 pd_index,
struct i40e_dma_mem *rsrc_pg)
{
enum i40e_status_code ret_code = I40E_SUCCESS;
struct i40e_hmc_pd_table *pd_table;
struct i40e_hmc_pd_entry *pd_entry;
struct i40e_dma_mem mem;
struct i40e_dma_mem *page = &mem;
u32 sd_idx, rel_pd_idx;
u64 *pd_addr;
u64 page_desc;
if (pd_index / I40E_HMC_PD_CNT_IN_SD >= hmc_info->sd_table.sd_cnt) {
ret_code = I40E_ERR_INVALID_PAGE_DESC_INDEX;
DEBUGOUT("i40e_add_pd_table_entry: bad pd_index\n");
goto exit;
}
/* find corresponding sd */
sd_idx = (pd_index / I40E_HMC_PD_CNT_IN_SD);
if (I40E_SD_TYPE_PAGED !=
hmc_info->sd_table.sd_entry[sd_idx].entry_type)
goto exit;
rel_pd_idx = (pd_index % I40E_HMC_PD_CNT_IN_SD);
pd_table = &hmc_info->sd_table.sd_entry[sd_idx].u.pd_table;
pd_entry = &pd_table->pd_entry[rel_pd_idx];
if (!pd_entry->valid) {
if (rsrc_pg) {
pd_entry->rsrc_pg = true;
page = rsrc_pg;
} else {
/* allocate a 4K backing page */
ret_code = i40e_allocate_dma_mem(hw, page, i40e_mem_bp,
I40E_HMC_PAGED_BP_SIZE,
I40E_HMC_PD_BP_BUF_ALIGNMENT);
if (ret_code)
goto exit;
pd_entry->rsrc_pg = false;
}
i40e_memcpy(&pd_entry->bp.addr, page,
sizeof(struct i40e_dma_mem), I40E_NONDMA_TO_NONDMA);
pd_entry->bp.sd_pd_index = pd_index;
pd_entry->bp.entry_type = I40E_SD_TYPE_PAGED;
/* Set page address and valid bit */
page_desc = page->pa | 0x1;
pd_addr = (u64 *)pd_table->pd_page_addr.va;
pd_addr += rel_pd_idx;
/* Add the backing page physical address in the pd entry */
i40e_memcpy(pd_addr, &page_desc, sizeof(u64),
I40E_NONDMA_TO_DMA);
pd_entry->sd_index = sd_idx;
pd_entry->valid = true;
I40E_INC_PD_REFCNT(pd_table);
}
I40E_INC_BP_REFCNT(&pd_entry->bp);
exit:
return ret_code;
}
/**
* 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
**/
enum i40e_status_code 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)
{
#ifdef I40E_QV
struct i40e_aq_desc qv_desc = {0};
struct i40e_aq_desc *qv_desc_on_ring;
#endif /* I40E_QV */
enum i40e_status_code status = I40E_SUCCESS;
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;
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_QUEUE_EMPTY;
goto asq_send_command_exit;
}
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_exit;
}
if (i40e_is_nvm_update_op(desc) && hw->aq.nvm_busy) {
i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, "AQTX: NVM busy.\n");
status = I40E_ERR_NVM;
goto asq_send_command_exit;
}
details = I40E_ADMINQ_DETAILS(hw->aq.asq, hw->aq.asq.next_to_use);
if (cmd_details) {
i40e_memcpy(details,
cmd_details,
sizeof(struct i40e_asq_cmd_details),
I40E_NONDMA_TO_NONDMA);
/* 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(I40E_HI_DWORD(details->cookie));
desc->cookie_low =
CPU_TO_LE32(I40E_LO_DWORD(details->cookie));
}
} else {
i40e_memset(details, 0,
sizeof(struct i40e_asq_cmd_details),
I40E_NONDMA_MEM);
}
/* 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);
i40e_acquire_spinlock(&hw->aq.asq_spinlock);
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 */
i40e_memcpy(desc_on_ring, desc, sizeof(struct i40e_aq_desc),
I40E_NONDMA_TO_DMA);
#ifdef I40E_QV
/* copy the descriptor from ring to userspace buffer */
i40e_memcpy(&qv_desc, desc_on_ring, sizeof(struct i40e_aq_desc),
I40E_DMA_TO_NONDMA);
qv_desc_on_ring = desc_on_ring;
desc_on_ring = &qv_desc;
#endif /* I40E_QV */
/* 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 */
i40e_memcpy(dma_buff->va, buff, buff_size,
I40E_NONDMA_TO_DMA);
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(I40E_HI_DWORD(dma_buff->pa));
desc_on_ring->params.external.addr_low =
CPU_TO_LE32(I40E_LO_DWORD(dma_buff->pa));
#ifdef I40E_QV
/* copy the descriptor from userspace buffer to ring */
i40e_memcpy(qv_desc_on_ring, desc_on_ring,
sizeof(struct i40e_aq_desc), I40E_NONDMA_TO_DMA);
#endif /* I40E_QV */
}
/* bump the tail */
i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, "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;
u32 delay_len = 10;
do {
#ifdef I40E_QV
/* copy the descriptor from ring to user buffer */
i40e_memcpy(desc_on_ring, qv_desc_on_ring,
sizeof(struct i40e_aq_desc), I40E_DMA_TO_NONDMA);
#endif /* I40E_QV */
/* AQ designers suggest use of head for better
* timing reliability than DD bit
*/
if (i40e_asq_done(hw))
break;
/* ugh! delay while spin_lock */
i40e_usec_delay(delay_len);
total_delay += delay_len;
} while (total_delay < hw->aq.asq_cmd_timeout);
}
/* if ready, copy the desc back to temp */
if (i40e_asq_done(hw)) {
#ifdef I40E_QV
/* Swap pointer back */
desc_on_ring = qv_desc_on_ring;
#endif /* I40E_QV */
i40e_memcpy(desc, desc_on_ring, sizeof(struct i40e_aq_desc),
I40E_DMA_TO_NONDMA);
if (buff != NULL)
i40e_memcpy(buff, dma_buff->va, buff_size,
I40E_DMA_TO_NONDMA);
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 = I40E_SUCCESS;
else
status = I40E_ERR_ADMIN_QUEUE_ERROR;
hw->aq.asq_last_status = (enum i40e_admin_queue_err)retval;
}
i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
"AQTX: desc and buffer writeback:\n");
i40e_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc, buff, buff_size);
/* update the error if time out occurred */
if ((!cmd_completed) &&
(!details->async && !details->postpone)) {
i40e_debug(hw,
I40E_DEBUG_AQ_MESSAGE,
"AQTX: Writeback timeout.\n");
status = I40E_ERR_ADMIN_QUEUE_TIMEOUT;
}
if (!status && i40e_is_nvm_update_op(desc))
hw->aq.nvm_busy = TRUE;
asq_send_command_error:
i40e_release_spinlock(&hw->aq.asq_spinlock);
asq_send_command_exit:
return status;
}
/**
* i40e_alloc_arq_bufs - Allocate pre-posted buffers for the receive queue
* @hw: pointer to the hardware structure
**/
static enum i40e_status_code i40e_alloc_arq_bufs(struct i40e_hw *hw)
{
#ifdef I40E_QV
struct i40e_aq_desc qv_desc;
struct i40e_aq_desc *qv_desc_on_ring;
#endif
enum i40e_status_code 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);
#ifdef I40E_QV
/* swap the descriptor with userspace version */
i40e_memcpy(&qv_desc, desc, sizeof(struct i40e_aq_desc),
I40E_DMA_TO_NONDMA);
qv_desc_on_ring = desc;
desc = &qv_desc;
#endif
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(I40E_HI_DWORD(bi->pa));
desc->params.external.addr_low =
CPU_TO_LE32(I40E_LO_DWORD(bi->pa));
desc->params.external.param0 = 0;
desc->params.external.param1 = 0;
#ifdef I40E_QV
/* put the initialized descriptor back to the ring */
i40e_memcpy(qv_desc_on_ring, desc, sizeof(struct i40e_aq_desc),
I40E_NONDMA_TO_DMA);
#endif
}
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_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'
**/
enum i40e_status_code i40e_clean_arq_element(struct i40e_hw *hw,
struct i40e_arq_event_info *e,
u16 *pending)
{
#ifdef I40E_QV
struct i40e_aq_desc qv_desc = {0};
struct i40e_aq_desc *qv_desc_on_ring;
#endif /* I40E_QV */
enum i40e_status_code ret_code = I40E_SUCCESS;
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;
/* take the lock before we start messing with the ring */
i40e_acquire_spinlock(&hw->aq.arq_spinlock);
/* 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 */
i40e_debug(hw,
I40E_DEBUG_AQ_MESSAGE,
"AQRX: Queue is empty.\n");
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);
#ifdef I40E_QV
/* copy the descriptor from ring to userspace buffer */
i40e_memcpy(&qv_desc, desc, sizeof(struct i40e_aq_desc),
I40E_DMA_TO_NONDMA);
qv_desc_on_ring = desc;
desc = &qv_desc;
#endif /* I40E_QV */
desc_idx = ntc;
flags = LE16_TO_CPU(desc->flags);
if (flags & I40E_AQ_FLAG_ERR) {
ret_code = I40E_ERR_ADMIN_QUEUE_ERROR;
hw->aq.arq_last_status =
(enum i40e_admin_queue_err)LE16_TO_CPU(desc->retval);
i40e_debug(hw,
I40E_DEBUG_AQ_MESSAGE,
"AQRX: Event received with error 0x%X.\n",
hw->aq.arq_last_status);
}
i40e_memcpy(&e->desc, desc, sizeof(struct i40e_aq_desc),
I40E_DMA_TO_NONDMA);
datalen = LE16_TO_CPU(desc->datalen);
e->msg_size = min(datalen, e->msg_size);
if (e->msg_buf != NULL && (e->msg_size != 0))
i40e_memcpy(e->msg_buf,
hw->aq.arq.r.arq_bi[desc_idx].va,
e->msg_size, I40E_DMA_TO_NONDMA);
i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, "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];
i40e_memset((void *)desc, 0, sizeof(struct i40e_aq_desc), I40E_DMA_MEM);
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(I40E_HI_DWORD(bi->pa));
desc->params.external.addr_low = CPU_TO_LE32(I40E_LO_DWORD(bi->pa));
#ifdef I40E_QV
/* copy the descriptor from userspace buffer to ring */
i40e_memcpy(qv_desc_on_ring, desc,
sizeof(struct i40e_aq_desc), I40E_NONDMA_TO_DMA);
#endif /* I40E_QV */
/* 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;
clean_arq_element_out:
/* Set pending if needed, unlock and return */
if (pending != NULL)
*pending = (ntc > ntu ? hw->aq.arq.count : 0) + (ntu - ntc);
i40e_release_spinlock(&hw->aq.arq_spinlock);
if (i40e_is_nvm_update_op(&e->desc)) {
hw->aq.nvm_busy = FALSE;
if (hw->aq.nvm_release_on_done) {
i40e_release_nvm(hw);
hw->aq.nvm_release_on_done = FALSE;
}
}
return ret_code;
}
