| /******************************************************************************* |
| * |
| * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver |
| * Copyright(c) 2013 - 2016 Intel Corporation. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program. If not, see <http://www.gnu.org/licenses/>. |
| * |
| * The full GNU General Public License is included in this distribution in |
| * the file called "COPYING". |
| * |
| * Contact Information: |
| * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> |
| * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| * |
| ******************************************************************************/ |
| |
| #include "i40e_status.h" |
| #include "i40e_type.h" |
| #include "i40e_register.h" |
| #include "i40e_adminq.h" |
| #include "i40e_prototype.h" |
| |
| /** |
| * i40e_is_nvm_update_op - return true if this is an NVM update operation |
| * @desc: API request descriptor |
| **/ |
| static inline bool i40e_is_nvm_update_op(struct i40e_aq_desc *desc) |
| { |
| return (desc->opcode == i40e_aqc_opc_nvm_erase) || |
| (desc->opcode == i40e_aqc_opc_nvm_update); |
| } |
| |
| /** |
| * 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; |
| } |
| } |
| |
| /** |
| * 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_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 = 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_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 = 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; |
| } |
| |
| /** |
| * i40evf_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 i40evf_init_adminq(struct i40e_hw *hw) |
| { |
| i40e_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 = 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; |
| |
| /* success! */ |
| goto init_adminq_exit; |
| |
| init_adminq_free_asq: |
| i40e_shutdown_asq(hw); |
| init_adminq_destroy_locks: |
| |
| init_adminq_exit: |
| return ret_code; |
| } |
| |
| /** |
| * i40evf_shutdown_adminq - shutdown routine for the Admin Queue |
| * @hw: pointer to the hardware structure |
| **/ |
| i40e_status i40evf_shutdown_adminq(struct i40e_hw *hw) |
| { |
| i40e_status ret_code = 0; |
| |
| if (i40evf_check_asq_alive(hw)) |
| i40evf_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_MESSAGE, |
| "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((void *)desc, 0, sizeof(struct i40e_aq_desc)); |
| memset((void *)details, 0, |
| sizeof(struct i40e_asq_cmd_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); |
| } |
| |
| /** |
| * i40evf_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 i40evf_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; |
| |
| } |
| |
| /** |
| * i40evf_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 i40evf_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_QUEUE_EMPTY; |
| 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_MESSAGE, "AQTX: desc and buffer:\n"); |
| i40evf_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 (i40evf_asq_done(hw)) |
| break; |
| usleep_range(1000, 2000); |
| total_delay++; |
| } while (total_delay < hw->aq.asq_cmd_timeout); |
| } |
| |
| /* if ready, copy the desc back to temp */ |
| if (i40evf_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 |
| 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"); |
| i40evf_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)) { |
| 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; |
| } |
| |
| /** |
| * i40evf_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 i40evf_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); |
| } |
| |
| /** |
| * i40evf_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 i40evf_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_VF_ARQH1_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_MESSAGE, "AQRX: desc and buffer:\n"); |
| i40evf_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; |
| |
| 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: |
| mutex_unlock(&hw->aq.arq_mutex); |
| |
| return ret_code; |
| } |
| |
| void i40evf_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); |
| } |