/** * i40e_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 tabe (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. **/ i40e_status i40e_remove_pd_bp(struct i40e_hw *hw, struct i40e_hmc_info *hmc_info, u32 idx, bool is_pf) { i40e_status ret_code = 0; struct i40e_hmc_pd_entry *pd_entry; struct i40e_hmc_pd_table *pd_table; struct i40e_hmc_sd_entry *sd_entry; u32 sd_idx, rel_pd_idx; u64 *pd_addr; /* calculate index */ sd_idx = idx / I40E_HMC_PD_CNT_IN_SD; rel_pd_idx = idx % I40E_HMC_PD_CNT_IN_SD; if (sd_idx >= hmc_info->sd_table.sd_cnt) { ret_code = I40E_ERR_INVALID_PAGE_DESC_INDEX; hw_dbg(hw, "i40e_remove_pd_bp: bad idx\n"); goto exit; } sd_entry = &hmc_info->sd_table.sd_entry[sd_idx]; if (I40E_SD_TYPE_PAGED != sd_entry->entry_type) { ret_code = I40E_ERR_INVALID_SD_TYPE; hw_dbg(hw, "i40e_remove_pd_bp: wrong sd_entry type\n"); goto exit; } /* get the entry and decrease its ref counter */ pd_table = &hmc_info->sd_table.sd_entry[sd_idx].u.pd_table; pd_entry = &pd_table->pd_entry[rel_pd_idx]; I40E_DEC_BP_REFCNT(&pd_entry->bp); if (pd_entry->bp.ref_cnt) goto exit; /* mark the entry invalid */ pd_entry->valid = false; I40E_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) I40E_INVALIDATE_PF_HMC_PD(hw, sd_idx, idx); else I40E_INVALIDATE_VF_HMC_PD(hw, sd_idx, idx, hmc_info->hmc_fn_id); /* free memory here */ ret_code = i40e_free_dma_mem(hw, &(pd_entry->bp.addr)); if (ret_code) goto exit; if (!pd_table->ref_cnt) i40e_free_virt_mem(hw, &pd_table->pd_entry_virt_mem); exit: return ret_code; }
/** * i40e_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 tabe (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 i40e_status_code i40e_remove_pd_bp(struct i40e_hw *hw, struct i40e_hmc_info *hmc_info, u32 idx) { enum i40e_status_code ret_code = I40E_SUCCESS; struct i40e_hmc_pd_entry *pd_entry; struct i40e_hmc_pd_table *pd_table; struct i40e_hmc_sd_entry *sd_entry; u32 sd_idx, rel_pd_idx; u64 *pd_addr; /* calculate index */ sd_idx = idx / I40E_HMC_PD_CNT_IN_SD; rel_pd_idx = idx % I40E_HMC_PD_CNT_IN_SD; if (sd_idx >= hmc_info->sd_table.sd_cnt) { ret_code = I40E_ERR_INVALID_PAGE_DESC_INDEX; DEBUGOUT("i40e_remove_pd_bp: bad idx\n"); goto exit; } sd_entry = &hmc_info->sd_table.sd_entry[sd_idx]; if (I40E_SD_TYPE_PAGED != sd_entry->entry_type) { ret_code = I40E_ERR_INVALID_SD_TYPE; DEBUGOUT("i40e_remove_pd_bp: wrong sd_entry type\n"); goto exit; } /* get the entry and decrease its ref counter */ pd_table = &hmc_info->sd_table.sd_entry[sd_idx].u.pd_table; pd_entry = &pd_table->pd_entry[rel_pd_idx]; I40E_DEC_BP_REFCNT(&pd_entry->bp); if (pd_entry->bp.ref_cnt) goto exit; /* mark the entry invalid */ pd_entry->valid = FALSE; I40E_DEC_PD_REFCNT(pd_table); pd_addr = (u64 *)pd_table->pd_page_addr.va; pd_addr += rel_pd_idx; i40e_memset(pd_addr, 0, sizeof(u64), I40E_DMA_MEM); I40E_INVALIDATE_PF_HMC_PD(hw, sd_idx, idx); /* free memory here */ if (!pd_entry->rsrc_pg) ret_code = i40e_free_dma_mem(hw, &(pd_entry->bp.addr)); if (I40E_SUCCESS != ret_code) goto exit; if (!pd_table->ref_cnt) i40e_free_virt_mem(hw, &pd_table->pd_entry_virt_mem); exit: return ret_code; }
/** * i40e_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 **/ i40e_status i40e_prep_remove_sd_bp(struct i40e_hmc_info *hmc_info, u32 idx) { i40e_status ret_code = 0; struct i40e_hmc_sd_entry *sd_entry; /* get the entry and decrease its ref counter */ sd_entry = &hmc_info->sd_table.sd_entry[idx]; I40E_DEC_BP_REFCNT(&sd_entry->u.bp); if (sd_entry->u.bp.ref_cnt) { ret_code = I40E_ERR_NOT_READY; goto exit; } I40E_DEC_SD_REFCNT(&hmc_info->sd_table); /* mark the entry invalid */ sd_entry->valid = false; exit: return ret_code; }