/**
* 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;
}