// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2013 - 2018 Intel Corporation. */
#include "i40e_alloc.h"
#include "i40e_debug.h"
#include "i40e_hmc.h"
#include "i40e_type.h"
/**
* 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" );
goto exit ;
}
if (sd_index >= hmc_info->sd_table.sd_cnt) {
ret_code = -EINVAL;
hw_dbg(hw, "i40e_add_sd_table_entry: bad sd_index\n" );
goto exit ;
}
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;
/* allocate a 4K pd page or 2M backing page */
ret_code = i40e_allocate_dma_mem(hw, &mem, alloc_len,
I40E_HMC_PD_BP_BUF_ALIGNMENT);
if (ret_code)
goto exit ;
dma_mem_alloc_done = true ;
if (I40E_SD_TYPE_PAGED == type) {
ret_code = i40e_allocate_virt_mem(hw,
&sd_entry->u.pd_table.pd_entry_virt_mem,
sizeof (struct i40e_hmc_pd_entry) * 512 );
if (ret_code)
goto exit ;
sd_entry->u.pd_table.pd_entry =
(struct i40e_hmc_pd_entry *)
sd_entry->u.pd_table.pd_entry_virt_mem.va;
sd_entry->u.pd_table.pd_page_addr = mem;
} else {
sd_entry->u.bp.addr = mem;
sd_entry->u.bp.sd_pd_index = sd_index;
}
/* initialize the sd entry */
hmc_info->sd_table.sd_entry[sd_index].entry_type = type;
/* 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 4 K boundary and zeroed memory .
* 2 . It should be 4 K 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" );
goto exit ;
}
/* find corresponding sd */
sd_idx = (pd_index / I40E_HMC_PD_CNT_IN_SD);
if (I40E_SD_TYPE_PAGED !=
hmc_info->sd_table.sd_entry[sd_idx].entry_type)
goto exit ;
rel_pd_idx = (pd_index % I40E_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 {
/* allocate a 4K backing page */
ret_code = i40e_allocate_dma_mem(hw, page,
I40E_HMC_PAGED_BP_SIZE,
I40E_HMC_PD_BP_BUF_ALIGNMENT);
if (ret_code)
goto exit ;
pd_entry->rsrc_pg = false ;
}
pd_entry->bp.addr = *page;
pd_entry->bp.sd_pd_index = pd_index;
pd_entry->bp.entry_type = I40E_SD_TYPE_PAGED;
/* Set page address and valid bit */
page_desc = page->pa | 0 x1;
pd_addr = (u64 *)pd_table->pd_page_addr.va;
pd_addr += rel_pd_idx;
/* Add the backing page physical address in the pd entry */
memcpy(pd_addr, &page_desc, sizeof (u64));
pd_entry->sd_index = sd_idx;
pd_entry->valid = true ;
I40E_INC_PD_REFCNT(pd_table);
}
I40E_INC_BP_REFCNT(&pd_entry->bp);
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
*
* 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" );
goto exit ;
}
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" );
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));
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 (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
**/
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;
goto exit ;
}
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);
return i40e_free_dma_mem(hw, &sd_entry->u.bp.addr);
}
/**
* 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;
goto exit ;
}
/* mark the entry invalid */
sd_entry->valid = false ;
I40E_DEC_SD_REFCNT(&hmc_info->sd_table);
exit :
return ret_code;
}
/**
* 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;
if (!is_pf)
return -EOPNOTSUPP;
sd_entry = &hmc_info->sd_table.sd_entry[idx];
I40E_CLEAR_PF_SD_ENTRY(hw, idx, I40E_SD_TYPE_PAGED);
return i40e_free_dma_mem(hw, &sd_entry->u.pd_table.pd_page_addr);
}
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