diff options
Diffstat (limited to 'drivers/net/ethernet/intel/iavf/iavf_adminq.c')
| -rw-r--r-- | drivers/net/ethernet/intel/iavf/iavf_adminq.c | 946 |
1 files changed, 946 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/iavf/iavf_adminq.c b/drivers/net/ethernet/intel/iavf/iavf_adminq.c new file mode 100644 index 000000000..9ffbd24d8 --- /dev/null +++ b/drivers/net/ethernet/intel/iavf/iavf_adminq.c @@ -0,0 +1,946 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright(c) 2013 - 2018 Intel Corporation. */ + +#include "iavf_status.h" +#include "iavf_type.h" +#include "iavf_register.h" +#include "iavf_adminq.h" +#include "iavf_prototype.h" + +/** + * iavf_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 iavf_adminq_init_regs(struct iavf_hw *hw) +{ + /* set head and tail registers in our local struct */ + hw->aq.asq.tail = IAVF_VF_ATQT1; + hw->aq.asq.head = IAVF_VF_ATQH1; + hw->aq.asq.len = IAVF_VF_ATQLEN1; + hw->aq.asq.bal = IAVF_VF_ATQBAL1; + hw->aq.asq.bah = IAVF_VF_ATQBAH1; + hw->aq.arq.tail = IAVF_VF_ARQT1; + hw->aq.arq.head = IAVF_VF_ARQH1; + hw->aq.arq.len = IAVF_VF_ARQLEN1; + hw->aq.arq.bal = IAVF_VF_ARQBAL1; + hw->aq.arq.bah = IAVF_VF_ARQBAH1; +} + +/** + * iavf_alloc_adminq_asq_ring - Allocate Admin Queue send rings + * @hw: pointer to the hardware structure + **/ +static enum iavf_status iavf_alloc_adminq_asq_ring(struct iavf_hw *hw) +{ + enum iavf_status ret_code; + + ret_code = iavf_allocate_dma_mem(hw, &hw->aq.asq.desc_buf, + iavf_mem_atq_ring, + (hw->aq.num_asq_entries * + sizeof(struct iavf_aq_desc)), + IAVF_ADMINQ_DESC_ALIGNMENT); + if (ret_code) + return ret_code; + + ret_code = iavf_allocate_virt_mem(hw, &hw->aq.asq.cmd_buf, + (hw->aq.num_asq_entries * + sizeof(struct iavf_asq_cmd_details))); + if (ret_code) { + iavf_free_dma_mem(hw, &hw->aq.asq.desc_buf); + return ret_code; + } + + return ret_code; +} + +/** + * iavf_alloc_adminq_arq_ring - Allocate Admin Queue receive rings + * @hw: pointer to the hardware structure + **/ +static enum iavf_status iavf_alloc_adminq_arq_ring(struct iavf_hw *hw) +{ + enum iavf_status ret_code; + + ret_code = iavf_allocate_dma_mem(hw, &hw->aq.arq.desc_buf, + iavf_mem_arq_ring, + (hw->aq.num_arq_entries * + sizeof(struct iavf_aq_desc)), + IAVF_ADMINQ_DESC_ALIGNMENT); + + return ret_code; +} + +/** + * iavf_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 iavf_free_adminq_asq(struct iavf_hw *hw) +{ + iavf_free_dma_mem(hw, &hw->aq.asq.desc_buf); +} + +/** + * iavf_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 iavf_free_adminq_arq(struct iavf_hw *hw) +{ + iavf_free_dma_mem(hw, &hw->aq.arq.desc_buf); +} + +/** + * iavf_alloc_arq_bufs - Allocate pre-posted buffers for the receive queue + * @hw: pointer to the hardware structure + **/ +static enum iavf_status iavf_alloc_arq_bufs(struct iavf_hw *hw) +{ + struct iavf_aq_desc *desc; + struct iavf_dma_mem *bi; + enum iavf_status ret_code; + 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 = iavf_allocate_virt_mem(hw, &hw->aq.arq.dma_head, + (hw->aq.num_arq_entries * + sizeof(struct iavf_dma_mem))); + if (ret_code) + goto alloc_arq_bufs; + hw->aq.arq.r.arq_bi = (struct iavf_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 = iavf_allocate_dma_mem(hw, bi, + iavf_mem_arq_buf, + hw->aq.arq_buf_size, + IAVF_ADMINQ_DESC_ALIGNMENT); + if (ret_code) + goto unwind_alloc_arq_bufs; + + /* now configure the descriptors for use */ + desc = IAVF_ADMINQ_DESC(hw->aq.arq, i); + + desc->flags = cpu_to_le16(IAVF_AQ_FLAG_BUF); + if (hw->aq.arq_buf_size > IAVF_AQ_LARGE_BUF) + desc->flags |= cpu_to_le16(IAVF_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--) + iavf_free_dma_mem(hw, &hw->aq.arq.r.arq_bi[i]); + iavf_free_virt_mem(hw, &hw->aq.arq.dma_head); + + return ret_code; +} + +/** + * iavf_alloc_asq_bufs - Allocate empty buffer structs for the send queue + * @hw: pointer to the hardware structure + **/ +static enum iavf_status iavf_alloc_asq_bufs(struct iavf_hw *hw) +{ + struct iavf_dma_mem *bi; + enum iavf_status ret_code; + int i; + + /* No mapped memory needed yet, just the buffer info structures */ + ret_code = iavf_allocate_virt_mem(hw, &hw->aq.asq.dma_head, + (hw->aq.num_asq_entries * + sizeof(struct iavf_dma_mem))); + if (ret_code) + goto alloc_asq_bufs; + hw->aq.asq.r.asq_bi = (struct iavf_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 = iavf_allocate_dma_mem(hw, bi, + iavf_mem_asq_buf, + hw->aq.asq_buf_size, + IAVF_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--) + iavf_free_dma_mem(hw, &hw->aq.asq.r.asq_bi[i]); + iavf_free_virt_mem(hw, &hw->aq.asq.dma_head); + + return ret_code; +} + +/** + * iavf_free_arq_bufs - Free receive queue buffer info elements + * @hw: pointer to the hardware structure + **/ +static void iavf_free_arq_bufs(struct iavf_hw *hw) +{ + int i; + + /* free descriptors */ + for (i = 0; i < hw->aq.num_arq_entries; i++) + iavf_free_dma_mem(hw, &hw->aq.arq.r.arq_bi[i]); + + /* free the descriptor memory */ + iavf_free_dma_mem(hw, &hw->aq.arq.desc_buf); + + /* free the dma header */ + iavf_free_virt_mem(hw, &hw->aq.arq.dma_head); +} + +/** + * iavf_free_asq_bufs - Free send queue buffer info elements + * @hw: pointer to the hardware structure + **/ +static void iavf_free_asq_bufs(struct iavf_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) + iavf_free_dma_mem(hw, &hw->aq.asq.r.asq_bi[i]); + + /* free the buffer info list */ + iavf_free_virt_mem(hw, &hw->aq.asq.cmd_buf); + + /* free the descriptor memory */ + iavf_free_dma_mem(hw, &hw->aq.asq.desc_buf); + + /* free the dma header */ + iavf_free_virt_mem(hw, &hw->aq.asq.dma_head); +} + +/** + * iavf_config_asq_regs - configure ASQ registers + * @hw: pointer to the hardware structure + * + * Configure base address and length registers for the transmit queue + **/ +static enum iavf_status iavf_config_asq_regs(struct iavf_hw *hw) +{ + enum iavf_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 | + IAVF_VF_ATQLEN1_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 = IAVF_ERR_ADMIN_QUEUE_ERROR; + + return ret_code; +} + +/** + * iavf_config_arq_regs - ARQ register configuration + * @hw: pointer to the hardware structure + * + * Configure base address and length registers for the receive (event queue) + **/ +static enum iavf_status iavf_config_arq_regs(struct iavf_hw *hw) +{ + enum iavf_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 | + IAVF_VF_ARQLEN1_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 = IAVF_ERR_ADMIN_QUEUE_ERROR; + + return ret_code; +} + +/** + * iavf_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 enum iavf_status iavf_init_asq(struct iavf_hw *hw) +{ + enum iavf_status ret_code = 0; + int i; + + if (hw->aq.asq.count > 0) { + /* queue already initialized */ + ret_code = IAVF_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 = IAVF_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 = iavf_alloc_adminq_asq_ring(hw); + if (ret_code) + goto init_adminq_exit; + + /* allocate buffers in the rings */ + ret_code = iavf_alloc_asq_bufs(hw); + if (ret_code) + goto init_adminq_free_rings; + + /* initialize base registers */ + ret_code = iavf_config_asq_regs(hw); + if (ret_code) + goto init_free_asq_bufs; + + /* success! */ + hw->aq.asq.count = hw->aq.num_asq_entries; + goto init_adminq_exit; + +init_free_asq_bufs: + for (i = 0; i < hw->aq.num_asq_entries; i++) + iavf_free_dma_mem(hw, &hw->aq.asq.r.asq_bi[i]); + iavf_free_virt_mem(hw, &hw->aq.asq.dma_head); + +init_adminq_free_rings: + iavf_free_adminq_asq(hw); + +init_adminq_exit: + return ret_code; +} + +/** + * iavf_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 enum iavf_status iavf_init_arq(struct iavf_hw *hw) +{ + enum iavf_status ret_code = 0; + int i; + + if (hw->aq.arq.count > 0) { + /* queue already initialized */ + ret_code = IAVF_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 = IAVF_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 = iavf_alloc_adminq_arq_ring(hw); + if (ret_code) + goto init_adminq_exit; + + /* allocate buffers in the rings */ + ret_code = iavf_alloc_arq_bufs(hw); + if (ret_code) + goto init_adminq_free_rings; + + /* initialize base registers */ + ret_code = iavf_config_arq_regs(hw); + if (ret_code) + goto init_free_arq_bufs; + + /* success! */ + hw->aq.arq.count = hw->aq.num_arq_entries; + goto init_adminq_exit; + +init_free_arq_bufs: + for (i = 0; i < hw->aq.num_arq_entries; i++) + iavf_free_dma_mem(hw, &hw->aq.arq.r.arq_bi[i]); + iavf_free_virt_mem(hw, &hw->aq.arq.dma_head); +init_adminq_free_rings: + iavf_free_adminq_arq(hw); + +init_adminq_exit: + return ret_code; +} + +/** + * iavf_shutdown_asq - shutdown the ASQ + * @hw: pointer to the hardware structure + * + * The main shutdown routine for the Admin Send Queue + **/ +static enum iavf_status iavf_shutdown_asq(struct iavf_hw *hw) +{ + enum iavf_status ret_code = 0; + + mutex_lock(&hw->aq.asq_mutex); + + if (hw->aq.asq.count == 0) { + ret_code = IAVF_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 */ + iavf_free_asq_bufs(hw); + +shutdown_asq_out: + mutex_unlock(&hw->aq.asq_mutex); + return ret_code; +} + +/** + * iavf_shutdown_arq - shutdown ARQ + * @hw: pointer to the hardware structure + * + * The main shutdown routine for the Admin Receive Queue + **/ +static enum iavf_status iavf_shutdown_arq(struct iavf_hw *hw) +{ + enum iavf_status ret_code = 0; + + mutex_lock(&hw->aq.arq_mutex); + + if (hw->aq.arq.count == 0) { + ret_code = IAVF_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 */ + iavf_free_arq_bufs(hw); + +shutdown_arq_out: + mutex_unlock(&hw->aq.arq_mutex); + return ret_code; +} + +/** + * iavf_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 + **/ +enum iavf_status iavf_init_adminq(struct iavf_hw *hw) +{ + enum iavf_status ret_code; + + /* 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 = IAVF_ERR_CONFIG; + goto init_adminq_exit; + } + + /* Set up register offsets */ + iavf_adminq_init_regs(hw); + + /* setup ASQ command write back timeout */ + hw->aq.asq_cmd_timeout = IAVF_ASQ_CMD_TIMEOUT; + + /* allocate the ASQ */ + ret_code = iavf_init_asq(hw); + if (ret_code) + goto init_adminq_destroy_locks; + + /* allocate the ARQ */ + ret_code = iavf_init_arq(hw); + if (ret_code) + goto init_adminq_free_asq; + + /* success! */ + goto init_adminq_exit; + +init_adminq_free_asq: + iavf_shutdown_asq(hw); +init_adminq_destroy_locks: + +init_adminq_exit: + return ret_code; +} + +/** + * iavf_shutdown_adminq - shutdown routine for the Admin Queue + * @hw: pointer to the hardware structure + **/ +enum iavf_status iavf_shutdown_adminq(struct iavf_hw *hw) +{ + if (iavf_check_asq_alive(hw)) + iavf_aq_queue_shutdown(hw, true); + + iavf_shutdown_asq(hw); + iavf_shutdown_arq(hw); + + return 0; +} + +/** + * iavf_clean_asq - cleans Admin send queue + * @hw: pointer to the hardware structure + * + * returns the number of free desc + **/ +static u16 iavf_clean_asq(struct iavf_hw *hw) +{ + struct iavf_adminq_ring *asq = &hw->aq.asq; + struct iavf_asq_cmd_details *details; + u16 ntc = asq->next_to_clean; + struct iavf_aq_desc desc_cb; + struct iavf_aq_desc *desc; + + desc = IAVF_ADMINQ_DESC(*asq, ntc); + details = IAVF_ADMINQ_DETAILS(*asq, ntc); + while (rd32(hw, hw->aq.asq.head) != ntc) { + iavf_debug(hw, IAVF_DEBUG_AQ_MESSAGE, + "ntc %d head %d.\n", ntc, rd32(hw, hw->aq.asq.head)); + + if (details->callback) { + IAVF_ADMINQ_CALLBACK cb_func = + (IAVF_ADMINQ_CALLBACK)details->callback; + desc_cb = *desc; + cb_func(hw, &desc_cb); + } + memset((void *)desc, 0, sizeof(struct iavf_aq_desc)); + memset((void *)details, 0, + sizeof(struct iavf_asq_cmd_details)); + ntc++; + if (ntc == asq->count) + ntc = 0; + desc = IAVF_ADMINQ_DESC(*asq, ntc); + details = IAVF_ADMINQ_DETAILS(*asq, ntc); + } + + asq->next_to_clean = ntc; + + return IAVF_DESC_UNUSED(asq); +} + +/** + * iavf_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. + **/ +bool iavf_asq_done(struct iavf_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; +} + +/** + * iavf_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 iavf_status iavf_asq_send_command(struct iavf_hw *hw, + struct iavf_aq_desc *desc, + void *buff, /* can be NULL */ + u16 buff_size, + struct iavf_asq_cmd_details *cmd_details) +{ + struct iavf_dma_mem *dma_buff = NULL; + struct iavf_asq_cmd_details *details; + struct iavf_aq_desc *desc_on_ring; + bool cmd_completed = false; + enum iavf_status status = 0; + u16 retval = 0; + u32 val = 0; + + mutex_lock(&hw->aq.asq_mutex); + + if (hw->aq.asq.count == 0) { + iavf_debug(hw, IAVF_DEBUG_AQ_MESSAGE, + "AQTX: Admin queue not initialized.\n"); + status = IAVF_ERR_QUEUE_EMPTY; + goto asq_send_command_error; + } + + hw->aq.asq_last_status = IAVF_AQ_RC_OK; + + val = rd32(hw, hw->aq.asq.head); + if (val >= hw->aq.num_asq_entries) { + iavf_debug(hw, IAVF_DEBUG_AQ_MESSAGE, + "AQTX: head overrun at %d\n", val); + status = IAVF_ERR_QUEUE_EMPTY; + goto asq_send_command_error; + } + + details = IAVF_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 iavf_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) { + iavf_debug(hw, + IAVF_DEBUG_AQ_MESSAGE, + "AQTX: Invalid buffer size: %d.\n", + buff_size); + status = IAVF_ERR_INVALID_SIZE; + goto asq_send_command_error; + } + + if (details->postpone && !details->async) { + iavf_debug(hw, + IAVF_DEBUG_AQ_MESSAGE, + "AQTX: Async flag not set along with postpone flag"); + status = IAVF_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 (iavf_clean_asq(hw) == 0) { + iavf_debug(hw, + IAVF_DEBUG_AQ_MESSAGE, + "AQTX: Error queue is full.\n"); + status = IAVF_ERR_ADMIN_QUEUE_FULL; + goto asq_send_command_error; + } + + /* initialize the temp desc pointer with the right desc */ + desc_on_ring = IAVF_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) { + 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 */ + iavf_debug(hw, IAVF_DEBUG_AQ_MESSAGE, "AQTX: desc and buffer:\n"); + iavf_debug_aq(hw, IAVF_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 (iavf_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 (iavf_asq_done(hw)) { + *desc = *desc_on_ring; + if (buff) + memcpy(buff, dma_buff->va, buff_size); + retval = le16_to_cpu(desc->retval); + if (retval != 0) { + iavf_debug(hw, + IAVF_DEBUG_AQ_MESSAGE, + "AQTX: Command completed with error 0x%X.\n", + retval); + + /* strip off FW internal code */ + retval &= 0xff; + } + cmd_completed = true; + if ((enum iavf_admin_queue_err)retval == IAVF_AQ_RC_OK) + status = 0; + else if ((enum iavf_admin_queue_err)retval == IAVF_AQ_RC_EBUSY) + status = IAVF_ERR_NOT_READY; + else + status = IAVF_ERR_ADMIN_QUEUE_ERROR; + hw->aq.asq_last_status = (enum iavf_admin_queue_err)retval; + } + + iavf_debug(hw, IAVF_DEBUG_AQ_MESSAGE, + "AQTX: desc and buffer writeback:\n"); + iavf_debug_aq(hw, IAVF_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) & IAVF_VF_ATQLEN1_ATQCRIT_MASK) { + iavf_debug(hw, IAVF_DEBUG_AQ_MESSAGE, + "AQTX: AQ Critical error.\n"); + status = IAVF_ERR_ADMIN_QUEUE_CRITICAL_ERROR; + } else { + iavf_debug(hw, IAVF_DEBUG_AQ_MESSAGE, + "AQTX: Writeback timeout.\n"); + status = IAVF_ERR_ADMIN_QUEUE_TIMEOUT; + } + } + +asq_send_command_error: + mutex_unlock(&hw->aq.asq_mutex); + return status; +} + +/** + * iavf_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 iavf_fill_default_direct_cmd_desc(struct iavf_aq_desc *desc, u16 opcode) +{ + /* zero out the desc */ + memset((void *)desc, 0, sizeof(struct iavf_aq_desc)); + desc->opcode = cpu_to_le16(opcode); + desc->flags = cpu_to_le16(IAVF_AQ_FLAG_SI); +} + +/** + * iavf_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 iavf_status iavf_clean_arq_element(struct iavf_hw *hw, + struct iavf_arq_event_info *e, + u16 *pending) +{ + u16 ntc = hw->aq.arq.next_to_clean; + struct iavf_aq_desc *desc; + enum iavf_status ret_code = 0; + struct iavf_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) { + iavf_debug(hw, IAVF_DEBUG_AQ_MESSAGE, + "AQRX: Admin queue not initialized.\n"); + ret_code = IAVF_ERR_QUEUE_EMPTY; + goto clean_arq_element_err; + } + + /* set next_to_use to head */ + ntu = rd32(hw, hw->aq.arq.head) & IAVF_VF_ARQH1_ARQH_MASK; + if (ntu == ntc) { + /* nothing to do - shouldn't need to update ring's values */ + ret_code = IAVF_ERR_ADMIN_QUEUE_NO_WORK; + goto clean_arq_element_out; + } + + /* now clean the next descriptor */ + desc = IAVF_ADMINQ_DESC(hw->aq.arq, ntc); + desc_idx = ntc; + + hw->aq.arq_last_status = + (enum iavf_admin_queue_err)le16_to_cpu(desc->retval); + flags = le16_to_cpu(desc->flags); + if (flags & IAVF_AQ_FLAG_ERR) { + ret_code = IAVF_ERR_ADMIN_QUEUE_ERROR; + iavf_debug(hw, + IAVF_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 && (e->msg_len != 0)) + memcpy(e->msg_buf, hw->aq.arq.r.arq_bi[desc_idx].va, + e->msg_len); + + iavf_debug(hw, IAVF_DEBUG_AQ_MESSAGE, "AQRX: desc and buffer:\n"); + iavf_debug_aq(hw, IAVF_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 iavf_aq_desc)); + + desc->flags = cpu_to_le16(IAVF_AQ_FLAG_BUF); + if (hw->aq.arq_buf_size > IAVF_AQ_LARGE_BUF) + desc->flags |= cpu_to_le16(IAVF_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; + +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; +} |