Release 4.7 drivers/net/ethernet/intel/i40e/i40e_lan_hmc.c

Directory: drivers/net/ethernet/intel/i40e
/*******************************************************************************
 *
 * Intel Ethernet Controller XL710 Family Linux Driver
 * Copyright(c) 2013 - 2014 Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * The full GNU General Public License is included in this distribution in
 * the file called "COPYING".
 *
 * Contact Information:
 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 ******************************************************************************/

#include "i40e_osdep.h"
#include "i40e_register.h"
#include "i40e_type.h"
#include "i40e_hmc.h"
#include "i40e_lan_hmc.h"
#include "i40e_prototype.h"

/* lan specific interface functions */

/**
 * i40e_align_l2obj_base - aligns base object pointer to 512 bytes
 * @offset: base address offset needing alignment
 *
 * Aligns the layer 2 function private memory so it's 512-byte aligned.
 **/


static u64 i40e_align_l2obj_base(u64 offset)
{
	u64 aligned_offset = offset;

	if ((offset % I40E_HMC_L2OBJ_BASE_ALIGNMENT) > 0)
		aligned_offset += (I40E_HMC_L2OBJ_BASE_ALIGNMENT -
				   (offset % I40E_HMC_L2OBJ_BASE_ALIGNMENT));

	return aligned_offset;
}

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/**
 * i40e_calculate_l2fpm_size - calculates layer 2 FPM memory size
 * @txq_num: number of Tx queues needing backing context
 * @rxq_num: number of Rx queues needing backing context
 * @fcoe_cntx_num: amount of FCoE statefull contexts needing backing context
 * @fcoe_filt_num: number of FCoE filters needing backing context
 *
 * Calculates the maximum amount of memory for the function required, based
 * on the number of resources it must provide context for.
 **/


static u64 i40e_calculate_l2fpm_size(u32 txq_num, u32 rxq_num,
			      u32 fcoe_cntx_num, u32 fcoe_filt_num)
{
	u64 fpm_size = 0;

	fpm_size = txq_num * I40E_HMC_OBJ_SIZE_TXQ;
	fpm_size = i40e_align_l2obj_base(fpm_size);

	fpm_size += (rxq_num * I40E_HMC_OBJ_SIZE_RXQ);
	fpm_size = i40e_align_l2obj_base(fpm_size);

	fpm_size += (fcoe_cntx_num * I40E_HMC_OBJ_SIZE_FCOE_CNTX);
	fpm_size = i40e_align_l2obj_base(fpm_size);

	fpm_size += (fcoe_filt_num * I40E_HMC_OBJ_SIZE_FCOE_FILT);
	fpm_size = i40e_align_l2obj_base(fpm_size);

	return fpm_size;
}

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/**
 * i40e_init_lan_hmc - initialize i40e_hmc_info struct
 * @hw: pointer to the HW structure
 * @txq_num: number of Tx queues needing backing context
 * @rxq_num: number of Rx queues needing backing context
 * @fcoe_cntx_num: amount of FCoE statefull contexts needing backing context
 * @fcoe_filt_num: number of FCoE filters needing backing context
 *
 * This function will be called once per physical function initialization.
 * It will fill out the i40e_hmc_obj_info structure for LAN objects based on
 * the driver's provided input, as well as information from the HMC itself
 * loaded from NVRAM.
 *
 * Assumptions:
 *   - HMC Resource Profile has been selected before calling this function.
 **/


i40e_status i40e_init_lan_hmc(struct i40e_hw *hw, u32 txq_num,
					u32 rxq_num, u32 fcoe_cntx_num,
					u32 fcoe_filt_num)
{
	struct i40e_hmc_obj_info *obj, *full_obj;
	i40e_status ret_code = 0;
	u64 l2fpm_size;
	u32 size_exp;

	hw->hmc.signature = I40E_HMC_INFO_SIGNATURE;
	hw->hmc.hmc_fn_id = hw->pf_id;

	/* allocate memory for hmc_obj */
	ret_code = i40e_allocate_virt_mem(hw, &hw->hmc.hmc_obj_virt_mem,
			sizeof(struct i40e_hmc_obj_info) * I40E_HMC_LAN_MAX);
	if (ret_code)
		goto init_lan_hmc_out;
	hw->hmc.hmc_obj = (struct i40e_hmc_obj_info *)
			  hw->hmc.hmc_obj_virt_mem.va;

	/* The full object will be used to create the LAN HMC SD */
	full_obj = &hw->hmc.hmc_obj[I40E_HMC_LAN_FULL];
	full_obj->max_cnt = 0;
	full_obj->cnt = 0;
	full_obj->base = 0;
	full_obj->size = 0;

	/* Tx queue context information */
	obj = &hw->hmc.hmc_obj[I40E_HMC_LAN_TX];
	obj->max_cnt = rd32(hw, I40E_GLHMC_LANQMAX);
	obj->cnt = txq_num;
	obj->base = 0;
	size_exp = rd32(hw, I40E_GLHMC_LANTXOBJSZ);
	obj->size = BIT_ULL(size_exp);

	/* validate values requested by driver don't exceed HMC capacity */
	if (txq_num > obj->max_cnt) {
		ret_code = I40E_ERR_INVALID_HMC_OBJ_COUNT;
		hw_dbg(hw, "i40e_init_lan_hmc: Tx context: asks for 0x%x but max allowed is 0x%x, returns error %d\n",
			  txq_num, obj->max_cnt, ret_code);
		goto init_lan_hmc_out;
	}

	/* aggregate values into the full LAN object for later */
	full_obj->max_cnt += obj->max_cnt;
	full_obj->cnt += obj->cnt;

	/* Rx queue context information */
	obj = &hw->hmc.hmc_obj[I40E_HMC_LAN_RX];
	obj->max_cnt = rd32(hw, I40E_GLHMC_LANQMAX);
	obj->cnt = rxq_num;
	obj->base = hw->hmc.hmc_obj[I40E_HMC_LAN_TX].base +
		    (hw->hmc.hmc_obj[I40E_HMC_LAN_TX].cnt *
		     hw->hmc.hmc_obj[I40E_HMC_LAN_TX].size);
	obj->base = i40e_align_l2obj_base(obj->base);
	size_exp = rd32(hw, I40E_GLHMC_LANRXOBJSZ);
	obj->size = BIT_ULL(size_exp);

	/* validate values requested by driver don't exceed HMC capacity */
	if (rxq_num > obj->max_cnt) {
		ret_code = I40E_ERR_INVALID_HMC_OBJ_COUNT;
		hw_dbg(hw, "i40e_init_lan_hmc: Rx context: asks for 0x%x but max allowed is 0x%x, returns error %d\n",
			  rxq_num, obj->max_cnt, ret_code);
		goto init_lan_hmc_out;
	}

	/* aggregate values into the full LAN object for later */
	full_obj->max_cnt += obj->max_cnt;
	full_obj->cnt += obj->cnt;

	/* FCoE context information */
	obj = &hw->hmc.hmc_obj[I40E_HMC_FCOE_CTX];
	obj->max_cnt = rd32(hw, I40E_GLHMC_FCOEMAX);
	obj->cnt = fcoe_cntx_num;
	obj->base = hw->hmc.hmc_obj[I40E_HMC_LAN_RX].base +
		    (hw->hmc.hmc_obj[I40E_HMC_LAN_RX].cnt *
		     hw->hmc.hmc_obj[I40E_HMC_LAN_RX].size);
	obj->base = i40e_align_l2obj_base(obj->base);
	size_exp = rd32(hw, I40E_GLHMC_FCOEDDPOBJSZ);
	obj->size = BIT_ULL(size_exp);

	/* validate values requested by driver don't exceed HMC capacity */
	if (fcoe_cntx_num > obj->max_cnt) {
		ret_code = I40E_ERR_INVALID_HMC_OBJ_COUNT;
		hw_dbg(hw, "i40e_init_lan_hmc: FCoE context: asks for 0x%x but max allowed is 0x%x, returns error %d\n",
			  fcoe_cntx_num, obj->max_cnt, ret_code);
		goto init_lan_hmc_out;
	}

	/* aggregate values into the full LAN object for later */
	full_obj->max_cnt += obj->max_cnt;
	full_obj->cnt += obj->cnt;

	/* FCoE filter information */
	obj = &hw->hmc.hmc_obj[I40E_HMC_FCOE_FILT];
	obj->max_cnt = rd32(hw, I40E_GLHMC_FCOEFMAX);
	obj->cnt = fcoe_filt_num;
	obj->base = hw->hmc.hmc_obj[I40E_HMC_FCOE_CTX].base +
		    (hw->hmc.hmc_obj[I40E_HMC_FCOE_CTX].cnt *
		     hw->hmc.hmc_obj[I40E_HMC_FCOE_CTX].size);
	obj->base = i40e_align_l2obj_base(obj->base);
	size_exp = rd32(hw, I40E_GLHMC_FCOEFOBJSZ);
	obj->size = BIT_ULL(size_exp);

	/* validate values requested by driver don't exceed HMC capacity */
	if (fcoe_filt_num > obj->max_cnt) {
		ret_code = I40E_ERR_INVALID_HMC_OBJ_COUNT;
		hw_dbg(hw, "i40e_init_lan_hmc: FCoE filter: asks for 0x%x but max allowed is 0x%x, returns error %d\n",
			  fcoe_filt_num, obj->max_cnt, ret_code);
		goto init_lan_hmc_out;
	}

	/* aggregate values into the full LAN object for later */
	full_obj->max_cnt += obj->max_cnt;
	full_obj->cnt += obj->cnt;

	hw->hmc.first_sd_index = 0;
	hw->hmc.sd_table.ref_cnt = 0;
	l2fpm_size = i40e_calculate_l2fpm_size(txq_num, rxq_num, fcoe_cntx_num,
					       fcoe_filt_num);
	if (NULL == hw->hmc.sd_table.sd_entry) {
		hw->hmc.sd_table.sd_cnt = (u32)
				   (l2fpm_size + I40E_HMC_DIRECT_BP_SIZE - 1) /
				   I40E_HMC_DIRECT_BP_SIZE;

		/* allocate the sd_entry members in the sd_table */
		ret_code = i40e_allocate_virt_mem(hw, &hw->hmc.sd_table.addr,
					  (sizeof(struct i40e_hmc_sd_entry) *
					  hw->hmc.sd_table.sd_cnt));
		if (ret_code)
			goto init_lan_hmc_out;
		hw->hmc.sd_table.sd_entry =
			(struct i40e_hmc_sd_entry *)hw->hmc.sd_table.addr.va;
	}
	/* store in the LAN full object for later */
	full_obj->size = l2fpm_size;

init_lan_hmc_out:
	return ret_code;
}

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/**
 * i40e_remove_pd_page - Remove a page from the page descriptor table
 * @hw: pointer to the HW structure
 * @hmc_info: pointer to the HMC configuration information structure
 * @idx: segment descriptor index to find the relevant page descriptor
 *
 * This function:
 *      1. Marks the entry in pd table (for paged address mode) invalid
 *      2. write to register PMPDINV to invalidate the backing page in FV cache
 *      3. Decrement the ref count for  pd_entry
 * assumptions:
 *      1. caller can deallocate the memory used by pd after this function
 *         returns.
 **/


static i40e_status i40e_remove_pd_page(struct i40e_hw *hw,
						 struct i40e_hmc_info *hmc_info,
						 u32 idx)
{
	i40e_status ret_code = 0;

	if (!i40e_prep_remove_pd_page(hmc_info, idx))
		ret_code = i40e_remove_pd_page_new(hw, hmc_info, idx, true);

	return ret_code;
}

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/**
 * i40e_remove_sd_bp - remove a backing page from a segment 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 sd table (for direct address mode) invalid
 *      2. write to register PMSDCMD, PMSDDATALOW(PMSDDATALOW.PMSDVALID set
 *         to 0) and PMSDDATAHIGH to invalidate the sd page
 *      3. Decrement the ref count for the sd_entry
 * assumptions:
 *      1. caller can deallocate the memory used by backing storage after this
 *         function returns.
 **/


static i40e_status i40e_remove_sd_bp(struct i40e_hw *hw,
					       struct i40e_hmc_info *hmc_info,
					       u32 idx)
{
	i40e_status ret_code = 0;

	if (!i40e_prep_remove_sd_bp(hmc_info, idx))
		ret_code = i40e_remove_sd_bp_new(hw, hmc_info, idx, true);

	return ret_code;
}

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/**
 * i40e_create_lan_hmc_object - allocate backing store for hmc objects
 * @hw: pointer to the HW structure
 * @info: pointer to i40e_hmc_create_obj_info struct
 *
 * This will allocate memory for PDs and backing pages and populate
 * the sd and pd entries.
 **/


static i40e_status i40e_create_lan_hmc_object(struct i40e_hw *hw,
				struct i40e_hmc_lan_create_obj_info *info)
{
	i40e_status ret_code = 0;
	struct i40e_hmc_sd_entry *sd_entry;
	u32 pd_idx1 = 0, pd_lmt1 = 0;
	u32 pd_idx = 0, pd_lmt = 0;
	bool pd_error = false;
	u32 sd_idx, sd_lmt;
	u64 sd_size;
	u32 i, j;

	if (NULL == info) {
		ret_code = I40E_ERR_BAD_PTR;
		hw_dbg(hw, "i40e_create_lan_hmc_object: bad info ptr\n");
		goto exit;
	}
	if (NULL == info->hmc_info) {
		ret_code = I40E_ERR_BAD_PTR;
		hw_dbg(hw, "i40e_create_lan_hmc_object: bad hmc_info ptr\n");
		goto exit;
	}
	if (I40E_HMC_INFO_SIGNATURE != info->hmc_info->signature) {
		ret_code = I40E_ERR_BAD_PTR;
		hw_dbg(hw, "i40e_create_lan_hmc_object: bad signature\n");
		goto exit;
	}

	if (info->start_idx >= info->hmc_info->hmc_obj[info->rsrc_type].cnt) {
		ret_code = I40E_ERR_INVALID_HMC_OBJ_INDEX;
		hw_dbg(hw, "i40e_create_lan_hmc_object: returns error %d\n",
			  ret_code);
		goto exit;
	}
	if ((info->start_idx + info->count) >
	    info->hmc_info->hmc_obj[info->rsrc_type].cnt) {
		ret_code = I40E_ERR_INVALID_HMC_OBJ_COUNT;
		hw_dbg(hw, "i40e_create_lan_hmc_object: returns error %d\n",
			  ret_code);
		goto exit;
	}

	/* find sd index and limit */
	I40E_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) {
			ret_code = I40E_ERR_INVALID_SD_INDEX;
			goto exit;
	}
	/* find pd index */
	I40E_FIND_PD_INDEX_LIMIT(info->hmc_info, info->rsrc_type,
				 info->start_idx, info->count, &pd_idx,
				 &pd_lmt);

	/* This is to cover for cases where you may not want to have an SD with
         * the full 2M memory but something smaller. By not filling out any
         * size, the function will default the SD size to be 2M.
         */
	if (info->direct_mode_sz == 0)
		sd_size = I40E_HMC_DIRECT_BP_SIZE;
	else
		sd_size = info->direct_mode_sz;

	/* check if all the sds are valid. If not, allocate a page and
         * initialize it.
         */
	for (j = sd_idx; j < sd_lmt; j++) {
		/* update the sd table entry */
		ret_code = i40e_add_sd_table_entry(hw, info->hmc_info, j,
						   info->entry_type,
						   sd_size);
		if (ret_code)
			goto exit_sd_error;
		sd_entry = &info->hmc_info->sd_table.sd_entry[j];
		if (I40E_SD_TYPE_PAGED == sd_entry->entry_type) {
			/* check if all the pds in this sd are valid. If not,
                         * allocate a page and initialize it.
                         */

			/* find pd_idx and pd_lmt in this sd */
			pd_idx1 = max(pd_idx, (j * I40E_HMC_MAX_BP_COUNT));
			pd_lmt1 = min(pd_lmt,
				      ((j + 1) * I40E_HMC_MAX_BP_COUNT));
			for (i = pd_idx1; i < pd_lmt1; i++) {
				/* update the pd table entry */
				ret_code = i40e_add_pd_table_entry(hw,
								info->hmc_info,
								i, NULL);
				if (ret_code) {
					pd_error = true;
					break;
				}
			}
			if (pd_error) {
				/* remove the backing pages from pd_idx1 to i */
				while (i && (i > pd_idx1)) {
					i40e_remove_pd_bp(hw, info->hmc_info,
							  (i - 1));
					i--;
				}
			}
		}
		if (!sd_entry->valid) {
			sd_entry->valid = true;
			switch (sd_entry->entry_type) {
			case I40E_SD_TYPE_PAGED:
				I40E_SET_PF_SD_ENTRY(hw,
					sd_entry->u.pd_table.pd_page_addr.pa,
					j, sd_entry->entry_type);
				break;
			case I40E_SD_TYPE_DIRECT:
				I40E_SET_PF_SD_ENTRY(hw, sd_entry->u.bp.addr.pa,
						     j, sd_entry->entry_type);
				break;
			default:
				ret_code = I40E_ERR_INVALID_SD_TYPE;
				goto exit;
			}
		}
	}
	goto exit;

exit_sd_error:
	/* cleanup for sd entries from j to sd_idx */
	while (j && (j > sd_idx)) {
		sd_entry = &info->hmc_info->sd_table.sd_entry[j - 1];
		switch (sd_entry->entry_type) {
		case I40E_SD_TYPE_PAGED:
			pd_idx1 = max(pd_idx,
				      ((j - 1) * I40E_HMC_MAX_BP_COUNT));
			pd_lmt1 = min(pd_lmt, (j * I40E_HMC_MAX_BP_COUNT));
			for (i = pd_idx1; i < pd_lmt1; i++)
				i40e_remove_pd_bp(hw, info->hmc_info, i);
			i40e_remove_pd_page(hw, info->hmc_info, (j - 1));
			break;
		case I40E_SD_TYPE_DIRECT:
			i40e_remove_sd_bp(hw, info->hmc_info, (j - 1));
			break;
		default:
			ret_code = I40E_ERR_INVALID_SD_TYPE;
			break;
		}
		j--;
	}
exit:
	return ret_code;
}

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/**
 * i40e_configure_lan_hmc - prepare the HMC backing store
 * @hw: pointer to the hw structure
 * @model: the model for the layout of the SD/PD tables
 *
 * - This function will be called once per physical function initialization.
 * - This function will be called after i40e_init_lan_hmc() and before
 *   any LAN/FCoE HMC objects can be created.
 **/


i40e_status i40e_configure_lan_hmc(struct i40e_hw *hw,
					     enum i40e_hmc_model model)
{
	struct i40e_hmc_lan_create_obj_info info;
	i40e_status ret_code = 0;
	u8 hmc_fn_id = hw->hmc.hmc_fn_id;
	struct i40e_hmc_obj_info *obj;

	/* Initialize part of the create object info struct */
	info.hmc_info = &hw->hmc;
	info.rsrc_type = I40E_HMC_LAN_FULL;
	info.start_idx = 0;
	info.direct_mode_sz = hw->hmc.hmc_obj[I40E_HMC_LAN_FULL].size;

	/* Build the SD entry for the LAN objects */
	switch (model) {
	case I40E_HMC_MODEL_DIRECT_PREFERRED:
	case I40E_HMC_MODEL_DIRECT_ONLY:
		info.entry_type = I40E_SD_TYPE_DIRECT;
		/* Make one big object, a single SD */
		info.count = 1;
		ret_code = i40e_create_lan_hmc_object(hw, &info);
		if (ret_code && (model == I40E_HMC_MODEL_DIRECT_PREFERRED))
			goto try_type_paged;
		else if (ret_code)
			goto configure_lan_hmc_out;
		/* else clause falls through the break */
		break;
	case I40E_HMC_MODEL_PAGED_ONLY:
try_type_paged:
		info.entry_type = I40E_SD_TYPE_PAGED;
		/* Make one big object in the PD table */
		info.count = 1;
		ret_code = i40e_create_lan_hmc_object(hw, &info);
		if (ret_code)
			goto configure_lan_hmc_out;
		break;
	default:
		/* unsupported type */
		ret_code = I40E_ERR_INVALID_SD_TYPE;
		hw_dbg(hw, "i40e_configure_lan_hmc: Unknown SD type: %d\n",
			  ret_code);
		goto configure_lan_hmc_out;
	}

	/* Configure and program the FPM registers so objects can be created */

	/* Tx contexts */
	obj = &hw->hmc.hmc_obj[I40E_HMC_LAN_TX];
	wr32(hw, I40E_GLHMC_LANTXBASE(hmc_fn_id),
	     (u32)((obj->base & I40E_GLHMC_LANTXBASE_FPMLANTXBASE_MASK) / 512));
	wr32(hw, I40E_GLHMC_LANTXCNT(hmc_fn_id), obj->cnt);

	/* Rx contexts */
	obj = &hw->hmc.hmc_obj[I40E_HMC_LAN_RX];
	wr32(hw, I40E_GLHMC_LANRXBASE(hmc_fn_id),
	     (u32)((obj->base & I40E_GLHMC_LANRXBASE_FPMLANRXBASE_MASK) / 512));
	wr32(hw, I40E_GLHMC_LANRXCNT(hmc_fn_id), obj->cnt);

	/* FCoE contexts */
	obj = &hw->hmc.hmc_obj[I40E_HMC_FCOE_CTX];
	wr32(hw, I40E_GLHMC_FCOEDDPBASE(hmc_fn_id),
	 (u32)((obj->base & I40E_GLHMC_FCOEDDPBASE_FPMFCOEDDPBASE_MASK) / 512));
	wr32(hw, I40E_GLHMC_FCOEDDPCNT(hmc_fn_id), obj->cnt);

	/* FCoE filters */
	obj = &hw->hmc.hmc_obj[I40E_HMC_FCOE_FILT];
	wr32(hw, I40E_GLHMC_FCOEFBASE(hmc_fn_id),
	     (u32)((obj->base & I40E_GLHMC_FCOEFBASE_FPMFCOEFBASE_MASK) / 512));
	wr32(hw, I40E_GLHMC_FCOEFCNT(hmc_fn_id), obj->cnt);

configure_lan_hmc_out:
	return ret_code;
}

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/**
 * i40e_delete_hmc_object - remove hmc objects
 * @hw: pointer to the HW structure
 * @info: pointer to i40e_hmc_delete_obj_info struct
 *
 * 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.
 **/


static i40e_status i40e_delete_lan_hmc_object(struct i40e_hw *hw,
				struct i40e_hmc_lan_delete_obj_info *info)
{
	i40e_status ret_code = 0;
	struct i40e_hmc_pd_table *pd_table;
	u32 pd_idx, pd_lmt, rel_pd_idx;
	u32 sd_idx, sd_lmt;
	u32 i, j;

	if (NULL == info) {
		ret_code = I40E_ERR_BAD_PTR;
		hw_dbg(hw, "i40e_delete_hmc_object: bad info ptr\n");
		goto exit;
	}
	if (NULL == info->hmc_info) {
		ret_code = I40E_ERR_BAD_PTR;
		hw_dbg(hw, "i40e_delete_hmc_object: bad info->hmc_info ptr\n");
		goto exit;
	}
	if (I40E_HMC_INFO_SIGNATURE != info->hmc_info->signature) {
		ret_code = I40E_ERR_BAD_PTR;
		hw_dbg(hw, "i40e_delete_hmc_object: bad hmc_info->signature\n");
		goto exit;
	}

	if (NULL == info->hmc_info->sd_table.sd_entry) {
		ret_code = I40E_ERR_BAD_PTR;
		hw_dbg(hw, "i40e_delete_hmc_object: bad sd_entry\n");
		goto exit;
	}

	if (NULL == info->hmc_info->hmc_obj) {
		ret_code = I40E_ERR_BAD_PTR;
		hw_dbg(hw, "i40e_delete_hmc_object: bad hmc_info->hmc_obj\n");
		goto exit;
	}
	if (info->start_idx >= info->hmc_info->hmc_obj[info->rsrc_type].cnt) {
		ret_code = I40E_ERR_INVALID_HMC_OBJ_INDEX;
		hw_dbg(hw, "i40e_delete_hmc_object: returns error %d\n",
			  ret_code);
		goto exit;
	}

	if ((info->start_idx + info->count) >
	    info->hmc_info->hmc_obj[info->rsrc_type].cnt) {
		ret_code = I40E_ERR_INVALID_HMC_OBJ_COUNT;
		hw_dbg(hw, "i40e_delete_hmc_object: returns error %d\n",
			  ret_code);
		goto exit;
	}

	I40E_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 / I40E_HMC_PD_CNT_IN_SD;

		if (I40E_SD_TYPE_PAGED !=
		    info->hmc_info->sd_table.sd_entry[sd_idx].entry_type)
			continue;

		rel_pd_idx = j % I40E_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 = i40e_remove_pd_bp(hw, info->hmc_info, j);
			if (ret_code)
				goto exit;
		}
	}

	/* find sd index and limit */
	I40E_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) {
		ret_code = I40E_ERR_INVALID_SD_INDEX;
		goto exit;
	}

	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 I40E_SD_TYPE_DIRECT:
			ret_code = i40e_remove_sd_bp(hw, info->hmc_info, i);
			if (ret_code)
				goto exit;
			break;
		case I40E_SD_TYPE_PAGED:
			ret_code = i40e_remove_pd_page(hw, info->hmc_info, i);
			if (ret_code)
				goto exit;
			break;
		default:
			break;
		}
	}
exit:
	return ret_code;
}

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Total 531 100.00% 1 100.00%

/**
 * i40e_shutdown_lan_hmc - Remove HMC backing store, free allocated memory
 * @hw: pointer to the hw structure
 *
 * This must be called by drivers as they are shutting down and being
 * removed from the OS.
 **/


i40e_status i40e_shutdown_lan_hmc(struct i40e_hw *hw)
{
	struct i40e_hmc_lan_delete_obj_info info;
	i40e_status ret_code;

	info.hmc_info = &hw->hmc;
	info.rsrc_type = I40E_HMC_LAN_FULL;
	info.start_idx = 0;
	info.count = 1;

	/* delete the object */
	ret_code = i40e_delete_lan_hmc_object(hw, &info);

	/* free the SD table entry for LAN */
	i40e_free_virt_mem(hw, &hw->hmc.sd_table.addr);
	hw->hmc.sd_table.sd_cnt = 0;
	hw->hmc.sd_table.sd_entry = NULL;

	/* free memory used for hmc_obj */
	i40e_free_virt_mem(hw, &hw->hmc.hmc_obj_virt_mem);
	hw->hmc.hmc_obj = NULL;

	return ret_code;
}

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#define I40E_HMC_STORE(_struct, _ele)		\
	offsetof(struct _struct, _ele),         \
        FIELD_SIZEOF(struct _struct, _ele)


struct i40e_context_ele {
	
u16 offset;
	
u16 size_of;
	
u16 width;
	
u16 lsb;
};

/* LAN Tx Queue Context */

static struct i40e_context_ele i40e_hmc_txq_ce_info[] = {
					     /* Field      Width    LSB */
	{I40E_HMC_STORE(i40e_hmc_obj_txq, head),           13,      0 },
	{I40E_HMC_STORE(i40e_hmc_obj_txq, new_context),     1,     30 },
	{I40E_HMC_STORE(i40e_hmc_obj_txq, base),           57,     32 },
	{I40E_HMC_STORE(i40e_hmc_obj_txq, fc_ena),          1,     89 },
	{I40E_HMC_STORE(i40e_hmc_obj_txq, timesync_ena),    1,     90 },
	{I40E_HMC_STORE(i40e_hmc_obj_txq, fd_ena),          1,     91 },
	{I40E_HMC_STORE(i40e_hmc_obj_txq, alt_vlan_ena),    1,     92 },
	{I40E_HMC_STORE(i40e_hmc_obj_txq, cpuid),           8,     96 },
/* line 1 */
	{I40E_HMC_STORE(i40e_hmc_obj_txq, thead_wb),       13,  0 + 128 },
	{I40E_HMC_STORE(i40e_hmc_obj_txq, head_wb_ena),     1, 32 + 128 },
	{I40E_HMC_STORE(i40e_hmc_obj_txq, qlen),           13, 33 + 128 },
	{I40E_HMC_STORE(i40e_hmc_obj_txq, tphrdesc_ena),    1, 46 + 128 },
	{I40E_HMC_STORE(i40e_hmc_obj_txq, tphrpacket_ena),  1, 47 + 128 },
	{I40E_HMC_STORE(i40e_hmc_obj_txq, tphwdesc_ena),    1, 48 + 128 },
	{I40E_HMC_STORE(i40e_hmc_obj_txq, head_wb_addr),   64, 64 + 128 },
/* line 7 */
	{I40E_HMC_STORE(i40e_hmc_obj_txq, crc),            32,  0 + (7 * 128) },
	{I40E_HMC_STORE(i40e_hmc_obj_txq, rdylist),        10, 84 + (7 * 128) },
	{I40E_HMC_STORE(i40e_hmc_obj_txq, rdylist_act),     1, 94 + (7 * 128) },
	{ 0 }
};

/* LAN Rx Queue Context */

static struct i40e_context_ele i40e_hmc_rxq_ce_info[] = {
					 /* Field      Width    LSB */
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, head),        13,	0   },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, cpuid),        8,	13  },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, base),        57,	32  },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, qlen),        13,	89  },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, dbuff),        7,	102 },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, hbuff),        5,	109 },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, dtype),        2,	114 },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, dsize),        1,	116 },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, crcstrip),     1,	117 },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, fc_ena),       1,	118 },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, l2tsel),       1,	119 },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, hsplit_0),     4,	120 },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, hsplit_1),     2,	124 },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, showiv),       1,	127 },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, rxmax),       14,	174 },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, tphrdesc_ena), 1,	193 },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, tphwdesc_ena), 1,	194 },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, tphdata_ena),  1,	195 },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, tphhead_ena),  1,	196 },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, lrxqthresh),   3,	198 },
	{ I40E_HMC_STORE(i40e_hmc_obj_rxq, prefena),      1,	201 },
	{ 0 }
};

/**
 * i40e_write_byte - replace HMC context byte
 * @hmc_bits: pointer to the HMC memory
 * @ce_info: a description of the struct to be read from
 * @src: the struct to be read from
 **/


static void i40e_write_byte(u8 *hmc_bits,
			    struct i40e_context_ele *ce_info,
			    u8 *src)
{
	u8 src_byte, dest_byte, mask;
	u8 *from, *dest;
	u16 shift_width;

	/* copy from the next struct field */
	from = src + ce_info->offset;

	/* prepare the bits and mask */
	shift_width = ce_info->lsb % 8;
	mask = (u8)(BIT(ce_info->width) - 1);

	src_byte = *from;
	src_byte &= mask;

	/* shift to correct alignment */
	mask <<= shift_width;
	src_byte <<= shift_width;

	/* get the current bits from the target bit string */
	dest = hmc_bits + (ce_info->lsb / 8);

	memcpy(&dest_byte, dest, sizeof(dest_byte));

	dest_byte &= ~mask;	/* get the bits not changing */
	dest_byte |= src_byte;	/* add in the new bits */

	/* put it all back */
	memcpy(dest, &dest_byte, sizeof(dest_byte));
}

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Total 139 100.00% 3 100.00%

/**
 * i40e_write_word - replace HMC context word
 * @hmc_bits: pointer to the HMC memory
 * @ce_info: a description of the struct to be read from
 * @src: the struct to be read from
 **/


static void i40e_write_word(u8 *hmc_bits,
			    struct i40e_context_ele *ce_info,
			    u8 *src)
{
	u16 src_word, mask;
	u8 *from, *dest;
	u16 shift_width;
	__le16 dest_word;

	/* copy from the next struct field */
	from = src + ce_info->offset;

	/* prepare the bits and mask */
	shift_width = ce_info->lsb % 8;
	mask = BIT(ce_info->width) - 1;

	/* don't swizzle the bits until after the mask because the mask bits
         * will be in a different bit position on big endian machines
         */
	src_word = *(u16 *)from;
	src_word &= mask;

	/* shift to correct alignment */
	mask <<= shift_width;
	src_word <<= shift_width;

	/* get the current bits from the target bit string */
	dest = hmc_bits + (ce_info->lsb / 8);

	memcpy(&dest_word, dest, sizeof(dest_word));

	dest_word &= ~(cpu_to_le16(mask));	/* get the bits not changing */
	dest_word |= cpu_to_le16(src_word);	/* add in the new bits */

	/* put it all back */
	memcpy(dest, &dest_word, sizeof(dest_word));
}

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Total 148 100.00% 2 100.00%

/**
 * i40e_write_dword - replace HMC context dword
 * @hmc_bits: pointer to the HMC memory
 * @ce_info: a description of the struct to be read from
 * @src: the struct to be read from
 **/


static void i40e_write_dword(u8 *hmc_bits,
			     struct i40e_context_ele *ce_info,
			     u8 *src)
{
	u32 src_dword, mask;
	u8 *from, *dest;
	u16 shift_width;
	__le32 dest_dword;

	/* copy from the next struct field */
	from = src + ce_info->offset;

	/* prepare the bits and mask */
	shift_width = ce_info->lsb % 8;

	/* if the field width is exactly 32 on an x86 machine, then the shift
         * operation will not work because the SHL instructions count is masked
         * to 5 bits so the shift will do nothing
         */
	if (ce_info->width < 32)
		mask = BIT(ce_info->width) - 1;
	else
		mask = ~(u32)0;

	/* don't swizzle the bits until after the mask because the mask bits
         * will be in a different bit position on big endian machines
         */
	src_dword = *(u32 *)from;
	src_dword &= mask;

	/* shift to correct alignment */
	mask <<= shift_width;
	src_dword <<= shift_width;

	/* get the current bits from the target bit string */
	dest = hmc_bits + (ce_info->lsb / 8);

	memcpy(&dest_dword, dest, sizeof(dest_dword));

	dest_dword &= ~(cpu_to_le32(mask));	/* get the bits not changing */
	dest_dword |= cpu_to_le32(src_dword);	/* add in the new bits */

	/* put it all back */
	memcpy(dest, &dest_dword, sizeof(dest_dword));
}

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paul m stillwell jr paul m stillwell jr 158 95.18% 1 33.33%
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Total 166 100.00% 3 100.00%

/**
 * i40e_write_qword - replace HMC context qword
 * @hmc_bits: pointer to the HMC memory
 * @ce_info: a description of the struct to be read from
 * @src: the struct to be read from
 **/


static void i40e_write_qword(u8 *hmc_bits,
			     struct i40e_context_ele *ce_info,
			     u8 *src)
{
	u64 src_qword, mask;
	u8 *from, *dest;
	u16 shift_width;
	__le64 dest_qword;

	/* copy from the next struct field */
	from = src + ce_info->offset;

	/* prepare the bits and mask */
	shift_width = ce_info->lsb % 8;

	/* if the field width is exactly 64 on an x86 machine, then the shift
         * operation will not work because the SHL instructions count is masked
         * to 6 bits so the shift will do nothing
         */
	if (ce_info->width < 64)
		mask = BIT_ULL(ce_info->width) - 1;
	else
		mask = ~(u64)0;

	/* don't swizzle the bits until after the mask because the mask bits
         * will be in a different bit position on big endian machines
         */
	src_qword = *(u64 *)from;
	src_qword &= mask;

	/* shift to correct alignment */
	mask <<= shift_width;
	src_qword <<= shift_width;

	/* get the current bits from the target bit string */
	dest = hmc_bits + (ce_info->lsb / 8);

	memcpy(&dest_qword, dest, sizeof(dest_qword));

	dest_qword &= ~(cpu_to_le64(mask));	/* get the bits not changing */
	dest_qword |= cpu_to_le64(src_qword);	/* add in the new bits */

	/* put it all back */
	memcpy(dest, &dest_qword, sizeof(dest_qword));
}

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jesse brandeburg jesse brandeburg 8 4.82% 2 66.67%
Total 166 100.00% 3 100.00%

/**
 * i40e_clear_hmc_context - zero out the HMC context bits
 * @hw:       the hardware struct
 * @context_bytes: pointer to the context bit array (DMA memory)
 * @hmc_type: the type of HMC resource
 **/


static i40e_status i40e_clear_hmc_context(struct i40e_hw *hw,
					u8 *context_bytes,
					enum i40e_hmc_lan_rsrc_type hmc_type)
{
	/* clean the bit array */
	memset(context_bytes, 0, (u32)hw->hmc.hmc_obj[hmc_type].size);

	return 0;
}

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Total 44 100.00% 1 100.00%

/**
 * i40e_set_hmc_context - replace HMC context bits
 * @context_bytes: pointer to the context bit array
 * @ce_info:  a description of the struct to be filled
 * @dest:     the struct to be filled
 **/


static i40e_status i40e_set_hmc_context(u8 *context_bytes,
					struct i40e_context_ele *ce_info,
					u8 *dest)
{
	int f;

	for (f = 0; ce_info[f].width != 0; f++) {

		/* we have to deal with each element of the HMC using the
                 * correct size so that we are correct regardless of the
                 * endianness of the machine
                 */
		switch (ce_info[f].size_of) {
		case 1:
			i40e_write_byte(context_bytes, &ce_info[f], dest);
			break;
		case 2:
			i40e_write_word(context_bytes, &ce_info[f], dest);
			break;
		case 4:
			i40e_write_dword(context_bytes, &ce_info[f], dest);
			break;
		case 8:
			i40e_write_qword(context_bytes, &ce_info[f], dest);
			break;
		}
	}

	return 0;
}

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jesse brandeburg jesse brandeburg 89 71.20% 1 50.00%
paul m stillwell jr paul m stillwell jr 36 28.80% 1 50.00%
Total 125 100.00% 2 100.00%

/**
 * i40e_hmc_get_object_va - retrieves an object's virtual address
 * @hmc_info: pointer to i40e_hmc_info struct
 * @object_base: pointer to u64 to get the va
 * @rsrc_type: the hmc resource type
 * @obj_idx: hmc object index
 *
 * This function retrieves the object's virtual address from the object
 * base pointer.  This function is used for LAN Queue contexts.
 **/

static

i40e_status i40e_hmc_get_object_va(struct i40e_hmc_info *hmc_info,
					u8 **object_base,
					enum i40e_hmc_lan_rsrc_type rsrc_type,
					u32 obj_idx)
{
	u32 obj_offset_in_sd, obj_offset_in_pd;
	i40e_status ret_code = 0;
	struct i40e_hmc_sd_entry *sd_entry;
	struct i40e_hmc_pd_entry *pd_entry;
	u32 pd_idx, pd_lmt, rel_pd_idx;
	u64 obj_offset_in_fpm;
	u32 sd_idx, sd_lmt;

	if (NULL == hmc_info) {
		ret_code = I40E_ERR_BAD_PTR;
		hw_dbg(hw, "i40e_hmc_get_object_va: bad hmc_info ptr\n");
		goto exit;
	}
	if (NULL == hmc_info->hmc_obj) {
		ret_code = I40E_ERR_BAD_PTR;
		hw_dbg(hw, "i40e_hmc_get_object_va: bad hmc_info->hmc_obj ptr\n");
		goto exit;
	}
	if (NULL == object_base) {
		ret_code = I40E_ERR_BAD_PTR;
		hw_dbg(hw, "i40e_hmc_get_object_va: bad object_base ptr\n");
		goto exit;
	}
	if (I40E_HMC_INFO_SIGNATURE != hmc_info->signature) {
		ret_code = I40E_ERR_BAD_PTR;
		hw_dbg(hw, "i40e_hmc_get_object_va: bad hmc_info->signature\n");
		goto exit;
	}
	if (obj_idx >= hmc_info->hmc_obj[rsrc_type].cnt) {
		hw_dbg(hw, "i40e_hmc_get_object_va: returns error %d\n",
			  ret_code);
		ret_code = I40E_ERR_INVALID_HMC_OBJ_INDEX;
		goto exit;
	}
	/* find sd index and limit */
	I40E_FIND_SD_INDEX_LIMIT(hmc_info, rsrc_type, obj_idx, 1,
				 &sd_idx, &sd_lmt);

	sd_entry = &hmc_info->sd_table.sd_entry[sd_idx];
	obj_offset_in_fpm = hmc_info->hmc_obj[rsrc_type].base +
			    hmc_info->hmc_obj[rsrc_type].size * obj_idx;

	if (I40E_SD_TYPE_PAGED == sd_entry->entry_type) {
		I40E_FIND_PD_INDEX_LIMIT(hmc_info, rsrc_type, obj_idx, 1,
					 &pd_idx, &pd_lmt);
		rel_pd_idx = pd_idx % I40E_HMC_PD_CNT_IN_SD;
		pd_entry = &sd_entry->u.pd_table.pd_entry[rel_pd_idx];
		obj_offset_in_pd = (u32)(obj_offset_in_fpm %
					 I40E_HMC_PAGED_BP_SIZE);
		*object_base = (u8 *)pd_entry->bp.addr.va + obj_offset_in_pd;
	} else {
		obj_offset_in_sd = (u32)(obj_offset_in_fpm %
					 I40E_HMC_DIRECT_BP_SIZE);
		*object_base = (u8 *)sd_entry->u.bp.addr.va + obj_offset_in_sd;
	}
exit:
	return ret_code;
}

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Total 346 100.00% 1 100.00%

/**
 * i40e_clear_lan_tx_queue_context - clear the HMC context for the queue
 * @hw:    the hardware struct
 * @queue: the queue we care about
 **/


i40e_status i40e_clear_lan_tx_queue_context(struct i40e_hw *hw,
						      u16 queue)
{
	i40e_status err;
	u8 *context_bytes;

	err = i40e_hmc_get_object_va(&hw->hmc, &context_bytes,
				     I40E_HMC_LAN_TX, queue);
	if (err < 0)
		return err;

	return i40e_clear_hmc_context(hw, context_bytes, I40E_HMC_LAN_TX);
}

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Total 56 100.00% 1 100.00%

/**
 * i40e_set_lan_tx_queue_context - set the HMC context for the queue
 * @hw:    the hardware struct
 * @queue: the queue we care about
 * @s:     the struct to be filled
 **/


i40e_status i40e_set_lan_tx_queue_context(struct i40e_hw *hw,
						    u16 queue,
						    struct i40e_hmc_obj_txq *s)
{
	i40e_status err;
	u8 *context_bytes;

	err = i40e_hmc_get_object_va(&hw->hmc, &context_bytes,
				     I40E_HMC_LAN_TX, queue);
	if (err < 0)
		return err;

	return i40e_set_hmc_context(context_bytes,
				    i40e_hmc_txq_ce_info, (u8 *)s);
}

Contributors
Person Tokens Prop Commits CommitProp
jesse brandeburg jesse brandeburg 65 100.00% 1 100.00%
Total 65 100.00% 1 100.00%

/**
 * i40e_clear_lan_rx_queue_context - clear the HMC context for the queue
 * @hw:    the hardware struct
 * @queue: the queue we care about
 **/


i40e_status i40e_clear_lan_rx_queue_context(struct i40e_hw *hw,
						      u16 queue)
{
	i40e_status err;
	u8 *context_bytes;

	err = i40e_hmc_get_object_va(&hw->hmc, &context_bytes,
				     I40E_HMC_LAN_RX, queue);
	if (err < 0)
		return err;

	return i40e_clear_hmc_context(hw, context_bytes, I40E_HMC_LAN_RX);
}

Contributors
Person Tokens Prop Commits CommitProp
jesse brandeburg jesse brandeburg 56 100.00% 1 100.00%
Total 56 100.00% 1 100.00%

/**
 * i40e_set_lan_rx_queue_context - set the HMC context for the queue
 * @hw:    the hardware struct
 * @queue: the queue we care about
 * @s:     the struct to be filled
 **/


i40e_status i40e_set_lan_rx_queue_context(struct i40e_hw *hw,
						    u16 queue,
						    struct i40e_hmc_obj_rxq *s)
{
	i40e_status err;
	u8 *context_bytes;

	err = i40e_hmc_get_object_va(&hw->hmc, &context_bytes,
				     I40E_HMC_LAN_RX, queue);
	if (err < 0)
		return err;

	return i40e_set_hmc_context(context_bytes,
				    i40e_hmc_rxq_ce_info, (u8 *)s);
}
Contributors
Person Tokens Prop Commits CommitProp
jesse brandeburg jesse brandeburg 65 100.00% 1 100.00%
Total 65 100.00% 1 100.00%

Overall Contributors
Person Tokens Prop Commits CommitProp
jesse brandeburg jesse brandeburg 4199 86.77% 4 50.00%
paul m stillwell jr paul m stillwell jr 632 13.06% 1 12.50%
kamil krawczyk kamil krawczyk 5 0.10% 1 12.50%
faisal latif faisal latif 2 0.04% 1 12.50%
greg rose greg rose 1 0.02% 1 12.50%
Total 4839 100.00% 8 100.00%
  Directory: drivers/net/ethernet/intel/i40e

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
jesse brandeburg	jesse brandeburg	39	100.00%	1	100.00%
	Total	39	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.7 drivers/net/ethernet/intel/i40e/i40e_lan_hmc.c

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