diff options
Diffstat (limited to 'drivers/infiniband/hw/i40iw/i40iw_hmc.c')
| -rw-r--r-- | drivers/infiniband/hw/i40iw/i40iw_hmc.c | 821 |
1 files changed, 821 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/i40iw/i40iw_hmc.c b/drivers/infiniband/hw/i40iw/i40iw_hmc.c new file mode 100644 index 000000000000..5484cbf55f0f --- /dev/null +++ b/drivers/infiniband/hw/i40iw/i40iw_hmc.c @@ -0,0 +1,821 @@ +/******************************************************************************* +* +* Copyright (c) 2015-2016 Intel Corporation. All rights reserved. +* +* This software is available to you under a choice of one of two +* licenses. You may choose to be licensed under the terms of the GNU +* General Public License (GPL) Version 2, available from the file +* COPYING in the main directory of this source tree, or the +* OpenFabrics.org BSD license below: +* +* Redistribution and use in source and binary forms, with or +* without modification, are permitted provided that the following +* conditions are met: +* +* - Redistributions of source code must retain the above +* copyright notice, this list of conditions and the following +* disclaimer. +* +* - Redistributions in binary form must reproduce the above +* copyright notice, this list of conditions and the following +* disclaimer in the documentation and/or other materials +* provided with the distribution. +* +* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +* SOFTWARE. +* +*******************************************************************************/ + +#include "i40iw_osdep.h" +#include "i40iw_register.h" +#include "i40iw_status.h" +#include "i40iw_hmc.h" +#include "i40iw_d.h" +#include "i40iw_type.h" +#include "i40iw_p.h" +#include "i40iw_vf.h" +#include "i40iw_virtchnl.h" + +/** + * i40iw_find_sd_index_limit - finds segment descriptor index limit + * @hmc_info: pointer to the HMC configuration information structure + * @type: type of HMC resources we're searching + * @index: starting index for the object + * @cnt: number of objects we're trying to create + * @sd_idx: pointer to return index of the segment descriptor in question + * @sd_limit: pointer to return the maximum number of segment descriptors + * + * This function calculates the segment descriptor index and index limit + * for the resource defined by i40iw_hmc_rsrc_type. + */ + +static inline void i40iw_find_sd_index_limit(struct i40iw_hmc_info *hmc_info, + u32 type, + u32 idx, + u32 cnt, + u32 *sd_idx, + u32 *sd_limit) +{ + u64 fpm_addr, fpm_limit; + + fpm_addr = hmc_info->hmc_obj[(type)].base + + hmc_info->hmc_obj[type].size * idx; + fpm_limit = fpm_addr + hmc_info->hmc_obj[type].size * cnt; + *sd_idx = (u32)(fpm_addr / I40IW_HMC_DIRECT_BP_SIZE); + *sd_limit = (u32)((fpm_limit - 1) / I40IW_HMC_DIRECT_BP_SIZE); + *sd_limit += 1; +} + +/** + * i40iw_find_pd_index_limit - finds page descriptor index limit + * @hmc_info: pointer to the HMC configuration information struct + * @type: HMC resource type we're examining + * @idx: starting index for the object + * @cnt: number of objects we're trying to create + * @pd_index: pointer to return page descriptor index + * @pd_limit: pointer to return page descriptor index limit + * + * Calculates the page descriptor index and index limit for the resource + * defined by i40iw_hmc_rsrc_type. + */ + +static inline void i40iw_find_pd_index_limit(struct i40iw_hmc_info *hmc_info, + u32 type, + u32 idx, + u32 cnt, + u32 *pd_idx, + u32 *pd_limit) +{ + u64 fpm_adr, fpm_limit; + + fpm_adr = hmc_info->hmc_obj[type].base + + hmc_info->hmc_obj[type].size * idx; + fpm_limit = fpm_adr + (hmc_info)->hmc_obj[(type)].size * (cnt); + *(pd_idx) = (u32)(fpm_adr / I40IW_HMC_PAGED_BP_SIZE); + *(pd_limit) = (u32)((fpm_limit - 1) / I40IW_HMC_PAGED_BP_SIZE); + *(pd_limit) += 1; +} + +/** + * i40iw_set_sd_entry - setup entry for sd programming + * @pa: physical addr + * @idx: sd index + * @type: paged or direct sd + * @entry: sd entry ptr + */ +static inline void i40iw_set_sd_entry(u64 pa, + u32 idx, + enum i40iw_sd_entry_type type, + struct update_sd_entry *entry) +{ + entry->data = pa | (I40IW_HMC_MAX_BP_COUNT << I40E_PFHMC_SDDATALOW_PMSDBPCOUNT_SHIFT) | + (((type == I40IW_SD_TYPE_PAGED) ? 0 : 1) << + I40E_PFHMC_SDDATALOW_PMSDTYPE_SHIFT) | + (1 << I40E_PFHMC_SDDATALOW_PMSDVALID_SHIFT); + entry->cmd = (idx | (1 << I40E_PFHMC_SDCMD_PMSDWR_SHIFT) | (1 << 15)); +} + +/** + * i40iw_clr_sd_entry - setup entry for sd clear + * @idx: sd index + * @type: paged or direct sd + * @entry: sd entry ptr + */ +static inline void i40iw_clr_sd_entry(u32 idx, enum i40iw_sd_entry_type type, + struct update_sd_entry *entry) +{ + entry->data = (I40IW_HMC_MAX_BP_COUNT << + I40E_PFHMC_SDDATALOW_PMSDBPCOUNT_SHIFT) | + (((type == I40IW_SD_TYPE_PAGED) ? 0 : 1) << + I40E_PFHMC_SDDATALOW_PMSDTYPE_SHIFT); + entry->cmd = (idx | (1 << I40E_PFHMC_SDCMD_PMSDWR_SHIFT) | (1 << 15)); +} + +/** + * i40iw_hmc_sd_one - setup 1 sd entry for cqp + * @dev: pointer to the device structure + * @hmc_fn_id: hmc's function id + * @pa: physical addr + * @sd_idx: sd index + * @type: paged or direct sd + * @setsd: flag to set or clear sd + */ +enum i40iw_status_code i40iw_hmc_sd_one(struct i40iw_sc_dev *dev, + u8 hmc_fn_id, + u64 pa, u32 sd_idx, + enum i40iw_sd_entry_type type, + bool setsd) +{ + struct i40iw_update_sds_info sdinfo; + + sdinfo.cnt = 1; + sdinfo.hmc_fn_id = hmc_fn_id; + if (setsd) + i40iw_set_sd_entry(pa, sd_idx, type, sdinfo.entry); + else + i40iw_clr_sd_entry(sd_idx, type, sdinfo.entry); + + return dev->cqp->process_cqp_sds(dev, &sdinfo); +} + +/** + * i40iw_hmc_sd_grp - setup group od sd entries for cqp + * @dev: pointer to the device structure + * @hmc_info: pointer to the HMC configuration information struct + * @sd_index: sd index + * @sd_cnt: number of sd entries + * @setsd: flag to set or clear sd + */ +static enum i40iw_status_code i40iw_hmc_sd_grp(struct i40iw_sc_dev *dev, + struct i40iw_hmc_info *hmc_info, + u32 sd_index, + u32 sd_cnt, + bool setsd) +{ + struct i40iw_hmc_sd_entry *sd_entry; + struct i40iw_update_sds_info sdinfo; + u64 pa; + u32 i; + enum i40iw_status_code ret_code = 0; + + memset(&sdinfo, 0, sizeof(sdinfo)); + sdinfo.hmc_fn_id = hmc_info->hmc_fn_id; + for (i = sd_index; i < sd_index + sd_cnt; i++) { + sd_entry = &hmc_info->sd_table.sd_entry[i]; + if (!sd_entry || + (!sd_entry->valid && setsd) || + (sd_entry->valid && !setsd)) + continue; + if (setsd) { + pa = (sd_entry->entry_type == I40IW_SD_TYPE_PAGED) ? + sd_entry->u.pd_table.pd_page_addr.pa : + sd_entry->u.bp.addr.pa; + i40iw_set_sd_entry(pa, i, sd_entry->entry_type, + &sdinfo.entry[sdinfo.cnt]); + } else { + i40iw_clr_sd_entry(i, sd_entry->entry_type, + &sdinfo.entry[sdinfo.cnt]); + } + sdinfo.cnt++; + if (sdinfo.cnt == I40IW_MAX_SD_ENTRIES) { + ret_code = dev->cqp->process_cqp_sds(dev, &sdinfo); + if (ret_code) { + i40iw_debug(dev, I40IW_DEBUG_HMC, + "i40iw_hmc_sd_grp: sd_programming failed err=%d\n", + ret_code); + return ret_code; + } + sdinfo.cnt = 0; + } + } + if (sdinfo.cnt) + ret_code = dev->cqp->process_cqp_sds(dev, &sdinfo); + + return ret_code; +} + +/** + * i40iw_vfdev_from_fpm - return vf dev ptr for hmc function id + * @dev: pointer to the device structure + * @hmc_fn_id: hmc's function id + */ +struct i40iw_vfdev *i40iw_vfdev_from_fpm(struct i40iw_sc_dev *dev, u8 hmc_fn_id) +{ + struct i40iw_vfdev *vf_dev = NULL; + u16 idx; + + for (idx = 0; idx < I40IW_MAX_PE_ENABLED_VF_COUNT; idx++) { + if (dev->vf_dev[idx] && + ((u8)dev->vf_dev[idx]->pmf_index == hmc_fn_id)) { + vf_dev = dev->vf_dev[idx]; + break; + } + } + return vf_dev; +} + +/** + * i40iw_vf_hmcinfo_from_fpm - get ptr to hmc for func_id + * @dev: pointer to the device structure + * @hmc_fn_id: hmc's function id + */ +struct i40iw_hmc_info *i40iw_vf_hmcinfo_from_fpm(struct i40iw_sc_dev *dev, + u8 hmc_fn_id) +{ + struct i40iw_hmc_info *hmc_info = NULL; + u16 idx; + + for (idx = 0; idx < I40IW_MAX_PE_ENABLED_VF_COUNT; idx++) { + if (dev->vf_dev[idx] && + ((u8)dev->vf_dev[idx]->pmf_index == hmc_fn_id)) { + hmc_info = &dev->vf_dev[idx]->hmc_info; + break; + } + } + return hmc_info; +} + +/** + * i40iw_hmc_finish_add_sd_reg - program sd entries for objects + * @dev: pointer to the device structure + * @info: create obj info + */ +static enum i40iw_status_code i40iw_hmc_finish_add_sd_reg(struct i40iw_sc_dev *dev, + struct i40iw_hmc_create_obj_info *info) +{ + if (info->start_idx >= info->hmc_info->hmc_obj[info->rsrc_type].cnt) + return I40IW_ERR_INVALID_HMC_OBJ_INDEX; + + if ((info->start_idx + info->count) > + info->hmc_info->hmc_obj[info->rsrc_type].cnt) + return I40IW_ERR_INVALID_HMC_OBJ_COUNT; + + if (!info->add_sd_cnt) + return 0; + + return i40iw_hmc_sd_grp(dev, info->hmc_info, + info->hmc_info->sd_indexes[0], + info->add_sd_cnt, true); +} + +/** + * i40iw_create_iw_hmc_obj - allocate backing store for hmc objects + * @dev: pointer to the device structure + * @info: pointer to i40iw_hmc_iw_create_obj_info struct + * + * This will allocate memory for PDs and backing pages and populate + * the sd and pd entries. + */ +enum i40iw_status_code i40iw_sc_create_hmc_obj(struct i40iw_sc_dev *dev, + struct i40iw_hmc_create_obj_info *info) +{ + struct i40iw_hmc_sd_entry *sd_entry; + u32 sd_idx, sd_lmt; + u32 pd_idx = 0, pd_lmt = 0; + u32 pd_idx1 = 0, pd_lmt1 = 0; + u32 i, j; + bool pd_error = false; + enum i40iw_status_code ret_code = 0; + + if (info->start_idx >= info->hmc_info->hmc_obj[info->rsrc_type].cnt) + return I40IW_ERR_INVALID_HMC_OBJ_INDEX; + + if ((info->start_idx + info->count) > + info->hmc_info->hmc_obj[info->rsrc_type].cnt) { + i40iw_debug(dev, I40IW_DEBUG_HMC, + "%s: error type %u, start = %u, req cnt %u, cnt = %u\n", + __func__, info->rsrc_type, info->start_idx, info->count, + info->hmc_info->hmc_obj[info->rsrc_type].cnt); + return I40IW_ERR_INVALID_HMC_OBJ_COUNT; + } + + if (!dev->is_pf) + return i40iw_vchnl_vf_add_hmc_objs(dev, info->rsrc_type, 0, info->count); + + i40iw_find_sd_index_limit(info->hmc_info, info->rsrc_type, + info->start_idx, info->count, + &sd_idx, &sd_lmt); + if (sd_idx >= info->hmc_info->sd_table.sd_cnt || + sd_lmt > info->hmc_info->sd_table.sd_cnt) { + return I40IW_ERR_INVALID_SD_INDEX; + } + i40iw_find_pd_index_limit(info->hmc_info, info->rsrc_type, + info->start_idx, info->count, &pd_idx, &pd_lmt); + + for (j = sd_idx; j < sd_lmt; j++) { + ret_code = i40iw_add_sd_table_entry(dev->hw, info->hmc_info, + j, + info->entry_type, + I40IW_HMC_DIRECT_BP_SIZE); + if (ret_code) + goto exit_sd_error; + sd_entry = &info->hmc_info->sd_table.sd_entry[j]; + + if ((sd_entry->entry_type == I40IW_SD_TYPE_PAGED) && + ((dev->hmc_info == info->hmc_info) && + (info->rsrc_type != I40IW_HMC_IW_PBLE))) { + pd_idx1 = max(pd_idx, (j * I40IW_HMC_MAX_BP_COUNT)); + pd_lmt1 = min(pd_lmt, + (j + 1) * I40IW_HMC_MAX_BP_COUNT); + for (i = pd_idx1; i < pd_lmt1; i++) { + /* update the pd table entry */ + ret_code = i40iw_add_pd_table_entry(dev->hw, info->hmc_info, + i, NULL); + if (ret_code) { + pd_error = true; + break; + } + } + if (pd_error) { + while (i && (i > pd_idx1)) { + i40iw_remove_pd_bp(dev->hw, info->hmc_info, (i - 1), + info->is_pf); + i--; + } + } + } + if (sd_entry->valid) + continue; + + info->hmc_info->sd_indexes[info->add_sd_cnt] = (u16)j; + info->add_sd_cnt++; + sd_entry->valid = true; + } + return i40iw_hmc_finish_add_sd_reg(dev, info); + +exit_sd_error: + while (j && (j > sd_idx)) { + sd_entry = &info->hmc_info->sd_table.sd_entry[j - 1]; + switch (sd_entry->entry_type) { + case I40IW_SD_TYPE_PAGED: + pd_idx1 = max(pd_idx, + (j - 1) * I40IW_HMC_MAX_BP_COUNT); + pd_lmt1 = min(pd_lmt, (j * I40IW_HMC_MAX_BP_COUNT)); + for (i = pd_idx1; i < pd_lmt1; i++) + i40iw_prep_remove_pd_page(info->hmc_info, i); + break; + case I40IW_SD_TYPE_DIRECT: + i40iw_prep_remove_pd_page(info->hmc_info, (j - 1)); + break; + default: + ret_code = I40IW_ERR_INVALID_SD_TYPE; + break; + } + j--; + } + + return ret_code; +} + +/** + * i40iw_finish_del_sd_reg - delete sd entries for objects + * @dev: pointer to the device structure + * @info: dele obj info + * @reset: true if called before reset + */ +static enum i40iw_status_code i40iw_finish_del_sd_reg(struct i40iw_sc_dev *dev, + struct i40iw_hmc_del_obj_info *info, + bool reset) +{ + struct i40iw_hmc_sd_entry *sd_entry; + enum i40iw_status_code ret_code = 0; + u32 i, sd_idx; + struct i40iw_dma_mem *mem; + + if (dev->is_pf && !reset) + ret_code = i40iw_hmc_sd_grp(dev, info->hmc_info, + info->hmc_info->sd_indexes[0], + info->del_sd_cnt, false); + + if (ret_code) + i40iw_debug(dev, I40IW_DEBUG_HMC, "%s: error cqp sd sd_grp\n", __func__); + + for (i = 0; i < info->del_sd_cnt; i++) { + sd_idx = info->hmc_info->sd_indexes[i]; + sd_entry = &info->hmc_info->sd_table.sd_entry[sd_idx]; + if (!sd_entry) + continue; + mem = (sd_entry->entry_type == I40IW_SD_TYPE_PAGED) ? + &sd_entry->u.pd_table.pd_page_addr : + &sd_entry->u.bp.addr; + + if (!mem || !mem->va) + i40iw_debug(dev, I40IW_DEBUG_HMC, "%s: error cqp sd mem\n", __func__); + else + i40iw_free_dma_mem(dev->hw, mem); + } + return ret_code; +} + +/** + * i40iw_del_iw_hmc_obj - remove pe hmc objects + * @dev: pointer to the device structure + * @info: pointer to i40iw_hmc_del_obj_info struct + * @reset: true if called before reset + * + * This will de-populate the SDs and PDs. It frees + * the memory for PDS and backing storage. After this function is returned, + * caller should deallocate memory allocated previously for + * book-keeping information about PDs and backing storage. + */ +enum i40iw_status_code i40iw_sc_del_hmc_obj(struct i40iw_sc_dev *dev, + struct i40iw_hmc_del_obj_info *info, + bool reset) +{ + struct i40iw_hmc_pd_table *pd_table; + u32 sd_idx, sd_lmt; + u32 pd_idx, pd_lmt, rel_pd_idx; + u32 i, j; + enum i40iw_status_code ret_code = 0; + + if (info->start_idx >= info->hmc_info->hmc_obj[info->rsrc_type].cnt) { + i40iw_debug(dev, I40IW_DEBUG_HMC, + "%s: error start_idx[%04d] >= [type %04d].cnt[%04d]\n", + __func__, info->start_idx, info->rsrc_type, + info->hmc_info->hmc_obj[info->rsrc_type].cnt); + return I40IW_ERR_INVALID_HMC_OBJ_INDEX; + } + + if ((info->start_idx + info->count) > + info->hmc_info->hmc_obj[info->rsrc_type].cnt) { + i40iw_debug(dev, I40IW_DEBUG_HMC, + "%s: error start_idx[%04d] + count %04d >= [type %04d].cnt[%04d]\n", + __func__, info->start_idx, info->count, + info->rsrc_type, + info->hmc_info->hmc_obj[info->rsrc_type].cnt); + return I40IW_ERR_INVALID_HMC_OBJ_COUNT; + } + if (!dev->is_pf) { + ret_code = i40iw_vchnl_vf_del_hmc_obj(dev, info->rsrc_type, 0, + info->count); + if (info->rsrc_type != I40IW_HMC_IW_PBLE) + return ret_code; + } + + i40iw_find_pd_index_limit(info->hmc_info, info->rsrc_type, + info->start_idx, info->count, &pd_idx, &pd_lmt); + + for (j = pd_idx; j < pd_lmt; j++) { + sd_idx = j / I40IW_HMC_PD_CNT_IN_SD; + + if (info->hmc_info->sd_table.sd_entry[sd_idx].entry_type != + I40IW_SD_TYPE_PAGED) + continue; + + rel_pd_idx = j % I40IW_HMC_PD_CNT_IN_SD; + pd_table = &info->hmc_info->sd_table.sd_entry[sd_idx].u.pd_table; + if (pd_table->pd_entry[rel_pd_idx].valid) { + ret_code = i40iw_remove_pd_bp(dev->hw, info->hmc_info, j, + info->is_pf); + if (ret_code) { + i40iw_debug(dev, I40IW_DEBUG_HMC, "%s: error\n", __func__); + return ret_code; + } + } + } + + i40iw_find_sd_index_limit(info->hmc_info, info->rsrc_type, + info->start_idx, info->count, &sd_idx, &sd_lmt); + if (sd_idx >= info->hmc_info->sd_table.sd_cnt || + sd_lmt > info->hmc_info->sd_table.sd_cnt) { + i40iw_debug(dev, I40IW_DEBUG_HMC, "%s: error invalid sd_idx\n", __func__); + return I40IW_ERR_INVALID_SD_INDEX; + } + + for (i = sd_idx; i < sd_lmt; i++) { + if (!info->hmc_info->sd_table.sd_entry[i].valid) + continue; + switch (info->hmc_info->sd_table.sd_entry[i].entry_type) { + case I40IW_SD_TYPE_DIRECT: + ret_code = i40iw_prep_remove_sd_bp(info->hmc_info, i); + if (!ret_code) { + info->hmc_info->sd_indexes[info->del_sd_cnt] = (u16)i; + info->del_sd_cnt++; + } + break; + case I40IW_SD_TYPE_PAGED: + ret_code = i40iw_prep_remove_pd_page(info->hmc_info, i); + if (!ret_code) { + info->hmc_info->sd_indexes[info->del_sd_cnt] = (u16)i; + info->del_sd_cnt++; + } + break; + default: + break; + } + } + return i40iw_finish_del_sd_reg(dev, info, reset); +} + +/** + * i40iw_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 i40iw_status_code i40iw_add_sd_table_entry(struct i40iw_hw *hw, + struct i40iw_hmc_info *hmc_info, + u32 sd_index, + enum i40iw_sd_entry_type type, + u64 direct_mode_sz) +{ + enum i40iw_status_code ret_code = 0; + struct i40iw_hmc_sd_entry *sd_entry; + bool dma_mem_alloc_done = false; + struct i40iw_dma_mem mem; + u64 alloc_len; + + sd_entry = &hmc_info->sd_table.sd_entry[sd_index]; + if (!sd_entry->valid) { + if (type == I40IW_SD_TYPE_PAGED) + alloc_len = I40IW_HMC_PAGED_BP_SIZE; + else + alloc_len = direct_mode_sz; + + /* allocate a 4K pd page or 2M backing page */ + ret_code = i40iw_allocate_dma_mem(hw, &mem, alloc_len, + I40IW_HMC_PD_BP_BUF_ALIGNMENT); + if (ret_code) + goto exit; + dma_mem_alloc_done = true; + if (type == I40IW_SD_TYPE_PAGED) { + ret_code = i40iw_allocate_virt_mem(hw, + &sd_entry->u.pd_table.pd_entry_virt_mem, + sizeof(struct i40iw_hmc_pd_entry) * 512); + if (ret_code) + goto exit; + sd_entry->u.pd_table.pd_entry = (struct i40iw_hmc_pd_entry *) + sd_entry->u.pd_table.pd_entry_virt_mem.va; + + memcpy(&sd_entry->u.pd_table.pd_page_addr, &mem, sizeof(struct i40iw_dma_mem)); + } else { + memcpy(&sd_entry->u.bp.addr, &mem, sizeof(struct i40iw_dma_mem)); + sd_entry->u.bp.sd_pd_index = sd_index; + } + + hmc_info->sd_table.sd_entry[sd_index].entry_type = type; + + I40IW_INC_SD_REFCNT(&hmc_info->sd_table); + } + if (sd_entry->entry_type == I40IW_SD_TYPE_DIRECT) + I40IW_INC_BP_REFCNT(&sd_entry->u.bp); +exit: + if (ret_code) + if (dma_mem_alloc_done) + i40iw_free_dma_mem(hw, &mem); + + return ret_code; +} + +/** + * i40iw_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 i40iw_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 i40iw_status_code i40iw_add_pd_table_entry(struct i40iw_hw *hw, + struct i40iw_hmc_info *hmc_info, + u32 pd_index, + struct i40iw_dma_mem *rsrc_pg) +{ + enum i40iw_status_code ret_code = 0; + struct i40iw_hmc_pd_table *pd_table; + struct i40iw_hmc_pd_entry *pd_entry; + struct i40iw_dma_mem mem; + struct i40iw_dma_mem *page = &mem; + u32 sd_idx, rel_pd_idx; + u64 *pd_addr; + u64 page_desc; + + if (pd_index / I40IW_HMC_PD_CNT_IN_SD >= hmc_info->sd_table.sd_cnt) + return I40IW_ERR_INVALID_PAGE_DESC_INDEX; + + sd_idx = (pd_index / I40IW_HMC_PD_CNT_IN_SD); + if (hmc_info->sd_table.sd_entry[sd_idx].entry_type != I40IW_SD_TYPE_PAGED) + return 0; + + rel_pd_idx = (pd_index % I40IW_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 { + ret_code = i40iw_allocate_dma_mem(hw, page, + I40IW_HMC_PAGED_BP_SIZE, + I40IW_HMC_PD_BP_BUF_ALIGNMENT); + if (ret_code) + return ret_code; + pd_entry->rsrc_pg = false; + } + + memcpy(&pd_entry->bp.addr, page, sizeof(struct i40iw_dma_mem)); + pd_entry->bp.sd_pd_index = pd_index; + pd_entry->bp.entry_type = I40IW_SD_TYPE_PAGED; + page_desc = page->pa | 0x1; + + pd_addr = (u64 *)pd_table->pd_page_addr.va; + pd_addr += rel_pd_idx; + + memcpy(pd_addr, &page_desc, sizeof(*pd_addr)); + + pd_entry->sd_index = sd_idx; + pd_entry->valid = true; + I40IW_INC_PD_REFCNT(pd_table); + if (hmc_info->hmc_fn_id < I40IW_FIRST_VF_FPM_ID) + I40IW_INVALIDATE_PF_HMC_PD(hw, sd_idx, rel_pd_idx); + else if (hw->hmc.hmc_fn_id != hmc_info->hmc_fn_id) + I40IW_INVALIDATE_VF_HMC_PD(hw, sd_idx, rel_pd_idx, + hmc_info->hmc_fn_id); + } + I40IW_INC_BP_REFCNT(&pd_entry->bp); + + return 0; +} + +/** + * i40iw_remove_pd_bp - remove a backing page from a page descriptor + * @hw: pointer to our HW structure + * @hmc_info: pointer to the HMC configuration information structure + * @idx: the page index + * @is_pf: distinguishes a VF from a PF + * + * This function: + * 1. Marks the entry in pd table (for paged address mode) or in sd table + * (for direct address mode) invalid. + * 2. Write to register PMPDINV to invalidate the backing page in FV cache + * 3. Decrement the ref count for the pd _entry + * assumptions: + * 1. Caller can deallocate the memory used by backing storage after this + * function returns. + */ +enum i40iw_status_code i40iw_remove_pd_bp(struct i40iw_hw *hw, + struct i40iw_hmc_info *hmc_info, + u32 idx, + bool is_pf) +{ + struct i40iw_hmc_pd_entry *pd_entry; + struct i40iw_hmc_pd_table *pd_table; + struct i40iw_hmc_sd_entry *sd_entry; + u32 sd_idx, rel_pd_idx; + struct i40iw_dma_mem *mem; + u64 *pd_addr; + + sd_idx = idx / I40IW_HMC_PD_CNT_IN_SD; + rel_pd_idx = idx % I40IW_HMC_PD_CNT_IN_SD; + if (sd_idx >= hmc_info->sd_table.sd_cnt) + return I40IW_ERR_INVALID_PAGE_DESC_INDEX; + + sd_entry = &hmc_info->sd_table.sd_entry[sd_idx]; + if (sd_entry->entry_type != I40IW_SD_TYPE_PAGED) + return I40IW_ERR_INVALID_SD_TYPE; + + pd_table = &hmc_info->sd_table.sd_entry[sd_idx].u.pd_table; + pd_entry = &pd_table->pd_entry[rel_pd_idx]; + I40IW_DEC_BP_REFCNT(&pd_entry->bp); + if (pd_entry->bp.ref_cnt) + return 0; + + pd_entry->valid = false; + I40IW_DEC_PD_REFCNT(pd_table); + pd_addr = (u64 *)pd_table->pd_page_addr.va; + pd_addr += rel_pd_idx; + memset(pd_addr, 0, sizeof(u64)); + if (is_pf) + I40IW_INVALIDATE_PF_HMC_PD(hw, sd_idx, idx); + else + I40IW_INVALIDATE_VF_HMC_PD(hw, sd_idx, idx, + hmc_info->hmc_fn_id); + + if (!pd_entry->rsrc_pg) { + mem = &pd_entry->bp.addr; + if (!mem || !mem->va) + return I40IW_ERR_PARAM; + i40iw_free_dma_mem(hw, mem); + } + if (!pd_table->ref_cnt) + i40iw_free_virt_mem(hw, &pd_table->pd_entry_virt_mem); + + return 0; +} + +/** + * i40iw_prep_remove_sd_bp - Prepares to remove a backing page from a sd entry + * @hmc_info: pointer to the HMC configuration information structure + * @idx: the page index + */ +enum i40iw_status_code i40iw_prep_remove_sd_bp(struct i40iw_hmc_info *hmc_info, u32 idx) +{ + struct i40iw_hmc_sd_entry *sd_entry; + + sd_entry = &hmc_info->sd_table.sd_entry[idx]; + I40IW_DEC_BP_REFCNT(&sd_entry->u.bp); + if (sd_entry->u.bp.ref_cnt) + return I40IW_ERR_NOT_READY; + + I40IW_DEC_SD_REFCNT(&hmc_info->sd_table); + sd_entry->valid = false; + + return 0; +} + +/** + * i40iw_prep_remove_pd_page - Prepares to remove a PD page from sd entry. + * @hmc_info: pointer to the HMC configuration information structure + * @idx: segment descriptor index to find the relevant page descriptor + */ +enum i40iw_status_code i40iw_prep_remove_pd_page(struct i40iw_hmc_info *hmc_info, + u32 idx) +{ + struct i40iw_hmc_sd_entry *sd_entry; + + sd_entry = &hmc_info->sd_table.sd_entry[idx]; + + if (sd_entry->u.pd_table.ref_cnt) + return I40IW_ERR_NOT_READY; + + sd_entry->valid = false; + I40IW_DEC_SD_REFCNT(&hmc_info->sd_table); + + return 0; +} + +/** + * i40iw_pf_init_vfhmc - + * @vf_cnt_array: array of cnt values of iwarp hmc objects + * @vf_hmc_fn_id: hmc function id ofr vf driver + * @dev: pointer to i40iw_dev struct + * + * Called by pf driver to initialize hmc_info for vf driver instance. + */ +enum i40iw_status_code i40iw_pf_init_vfhmc(struct i40iw_sc_dev *dev, + u8 vf_hmc_fn_id, + u32 *vf_cnt_array) +{ + struct i40iw_hmc_info *hmc_info; + enum i40iw_status_code ret_code = 0; + u32 i; + + if ((vf_hmc_fn_id < I40IW_FIRST_VF_FPM_ID) || + (vf_hmc_fn_id >= I40IW_FIRST_VF_FPM_ID + + I40IW_MAX_PE_ENABLED_VF_COUNT)) { + i40iw_debug(dev, I40IW_DEBUG_HMC, "%s: invalid vf_hmc_fn_id 0x%x\n", + __func__, vf_hmc_fn_id); + return I40IW_ERR_INVALID_HMCFN_ID; + } + + ret_code = i40iw_sc_init_iw_hmc(dev, vf_hmc_fn_id); + if (ret_code) + return ret_code; + + hmc_info = i40iw_vf_hmcinfo_from_fpm(dev, vf_hmc_fn_id); + + for (i = I40IW_HMC_IW_QP; i < I40IW_HMC_IW_MAX; i++) + if (vf_cnt_array) + hmc_info->hmc_obj[i].cnt = + vf_cnt_array[i - I40IW_HMC_IW_QP]; + else + hmc_info->hmc_obj[i].cnt = hmc_info->hmc_obj[i].max_cnt; + + return 0; +} |