/** * i40e_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
**/ int i40e_add_sd_table_entry(struct i40e_hw *hw, struct i40e_hmc_info *hmc_info,
u32 sd_index, enum i40e_sd_entry_type type,
u64 direct_mode_sz)
{ struct i40e_hmc_sd_entry *sd_entry; bool dma_mem_alloc_done = false; struct i40e_dma_mem mem; int ret_code = 0;
u64 alloc_len;
if (NULL == hmc_info->sd_table.sd_entry) {
ret_code = -EINVAL;
hw_dbg(hw, "i40e_add_sd_table_entry: bad sd_entry\n"); gotoexit;
}
if (sd_index >= hmc_info->sd_table.sd_cnt) {
ret_code = -EINVAL;
hw_dbg(hw, "i40e_add_sd_table_entry: bad sd_index\n"); gotoexit;
}
sd_entry = &hmc_info->sd_table.sd_entry[sd_index]; if (!sd_entry->valid) { if (type == I40E_SD_TYPE_PAGED)
alloc_len = I40E_HMC_PAGED_BP_SIZE; else
alloc_len = direct_mode_sz;
/* increment the ref count */
I40E_INC_SD_REFCNT(&hmc_info->sd_table);
} /* Increment backing page reference count */ if (I40E_SD_TYPE_DIRECT == sd_entry->entry_type)
I40E_INC_BP_REFCNT(&sd_entry->u.bp); exit: if (ret_code) if (dma_mem_alloc_done)
i40e_free_dma_mem(hw, &mem);
return ret_code;
}
/** * i40e_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 i40e_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.
**/ int i40e_add_pd_table_entry(struct i40e_hw *hw, struct i40e_hmc_info *hmc_info,
u32 pd_index, struct i40e_dma_mem *rsrc_pg)
{ struct i40e_hmc_pd_table *pd_table; struct i40e_hmc_pd_entry *pd_entry; struct i40e_dma_mem mem; struct i40e_dma_mem *page = &mem;
u32 sd_idx, rel_pd_idx; int ret_code = 0;
u64 page_desc;
u64 *pd_addr;
if (pd_index / I40E_HMC_PD_CNT_IN_SD >= hmc_info->sd_table.sd_cnt) {
ret_code = -EINVAL;
hw_dbg(hw, "i40e_add_pd_table_entry: bad pd_index\n"); gotoexit;
}
/** * 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 * * 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.
**/ int i40e_remove_pd_bp(struct i40e_hw *hw, struct i40e_hmc_info *hmc_info,
u32 idx)
{ 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; int ret_code = 0;
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 = -EINVAL;
hw_dbg(hw, "i40e_remove_pd_bp: bad idx\n"); gotoexit;
}
sd_entry = &hmc_info->sd_table.sd_entry[sd_idx]; if (I40E_SD_TYPE_PAGED != sd_entry->entry_type) {
ret_code = -EINVAL;
hw_dbg(hw, "i40e_remove_pd_bp: wrong sd_entry type\n"); gotoexit;
} /* 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) gotoexit;
/* free memory here */ if (!pd_entry->rsrc_pg)
ret_code = i40e_free_dma_mem(hw, &pd_entry->bp.addr); if (ret_code) gotoexit; 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
**/ int i40e_prep_remove_sd_bp(struct i40e_hmc_info *hmc_info,
u32 idx)
{ struct i40e_hmc_sd_entry *sd_entry; int ret_code = 0;
/* 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 = -EBUSY; gotoexit;
}
I40E_DEC_SD_REFCNT(&hmc_info->sd_table);
/* mark the entry invalid */
sd_entry->valid = false; exit: return ret_code;
}
/** * i40e_remove_sd_bp_new - Removes a backing page from a segment descriptor * @hw: pointer to our hw struct * @hmc_info: pointer to the HMC configuration information structure * @idx: the page index * @is_pf: used to distinguish between VF and PF
**/ int i40e_remove_sd_bp_new(struct i40e_hw *hw, struct i40e_hmc_info *hmc_info,
u32 idx, bool is_pf)
{ struct i40e_hmc_sd_entry *sd_entry;
if (!is_pf) return -EOPNOTSUPP;
/* get the entry and decrease its ref counter */
sd_entry = &hmc_info->sd_table.sd_entry[idx];
I40E_CLEAR_PF_SD_ENTRY(hw, idx, I40E_SD_TYPE_DIRECT);
/** * i40e_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
**/ int i40e_prep_remove_pd_page(struct i40e_hmc_info *hmc_info,
u32 idx)
{ struct i40e_hmc_sd_entry *sd_entry; int ret_code = 0;
sd_entry = &hmc_info->sd_table.sd_entry[idx];
if (sd_entry->u.pd_table.ref_cnt) {
ret_code = -EBUSY; gotoexit;
}
/* mark the entry invalid */
sd_entry->valid = false;
/** * i40e_remove_pd_page_new - Removes a PD page from sd entry. * @hw: pointer to our hw struct * @hmc_info: pointer to the HMC configuration information structure * @idx: segment descriptor index to find the relevant page descriptor * @is_pf: used to distinguish between VF and PF
**/ int i40e_remove_pd_page_new(struct i40e_hw *hw, struct i40e_hmc_info *hmc_info,
u32 idx, bool is_pf)
{ struct i40e_hmc_sd_entry *sd_entry;
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