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Commit 4cb584e0 authored by Jakub Kicinski's avatar Jakub Kicinski Committed by David S. Miller
Browse files

nfp: add CPP access core 



Command Push Pull is the name of NFP's network on a chip.
PCIe PF can access the interconnect through a number of mappings
controlled via Base Access Registers.  BARs allow the PF to issue
pretty much any command or address any memory on the chip.

Add appropriate logic and a handful of helper for simple operations
like reading scalars from memories.

Signed-off-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2633beb9

drivers/net/ethernet/netronome/nfp/Makefile

+4 −0
Original line number Diff line number Diff line 
obj-$(CONFIG_NFP)	+= nfp.o



nfp-objs := \

	    nfpcore/nfp6000_pcie.o \

	    nfpcore/nfp_cppcore.o \

	    nfpcore/nfp_cpplib.o \

	    nfpcore/nfp_target.o \

	    nfp_main.o \

	    nfp_net_common.o \

	    nfp_net_ethtool.o \

drivers/net/ethernet/netronome/nfp/nfpcore/nfp6000/nfp6000.h

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/*

 * Copyright (C) 2015-2017 Netronome Systems, Inc.

 *

 * This software is dual licensed under the GNU General License Version 2,

 * June 1991 as shown in the file COPYING in the top-level directory of this

 * source tree or the BSD 2-Clause License provided below.  You have the

 * option to license this software under the complete terms of either license.

 *

 * The BSD 2-Clause License:

 *

 *     Redistribution and use in source and binary forms, with or

 *     without modification, are permitted provided that the following

 *     conditions are met:

 *

 *      1. Redistributions of source code must retain the above

 *         copyright notice, this list of conditions and the following

 *         disclaimer.

 *

 *      2. Redistributions in binary form must reproduce the above

 *         copyright notice, this list of conditions and the following

 *         disclaimer in the documentation and/or other materials

 *         provided with the distribution.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

 * SOFTWARE.

 */



#ifndef NFP6000_NFP6000_H

#define NFP6000_NFP6000_H



#include <linux/errno.h>

#include <linux/types.h>



/* CPP Target IDs */

#define NFP_CPP_TARGET_INVALID          0

#define NFP_CPP_TARGET_NBI              1

#define NFP_CPP_TARGET_QDR              2

#define NFP_CPP_TARGET_ILA              6

#define NFP_CPP_TARGET_MU               7

#define NFP_CPP_TARGET_PCIE             9

#define NFP_CPP_TARGET_ARM              10

#define NFP_CPP_TARGET_CRYPTO           12

#define NFP_CPP_TARGET_ISLAND_XPB       14      /* Shared with CAP */

#define NFP_CPP_TARGET_ISLAND_CAP       14      /* Shared with XPB */

#define NFP_CPP_TARGET_CT_XPB           14

#define NFP_CPP_TARGET_LOCAL_SCRATCH    15

#define NFP_CPP_TARGET_CLS              NFP_CPP_TARGET_LOCAL_SCRATCH



#define NFP_ISL_EMEM0			24



#define NFP_MU_ADDR_ACCESS_TYPE_MASK	3ULL

#define NFP_MU_ADDR_ACCESS_TYPE_DIRECT	2ULL



#define PUSHPULL(_pull, _push)		((_pull) << 4 | (_push) << 0)

#define PUSH_WIDTH(_pushpull)		pushpull_width((_pushpull) >> 0)

#define PULL_WIDTH(_pushpull)		pushpull_width((_pushpull) >> 4)



static inline int pushpull_width(int pp)

{

	pp &= 0xf;



	if (pp == 0)

		return -EINVAL;

	return 2 << pp;

}



static inline int nfp_cppat_mu_locality_lsb(int mode, bool addr40)

{

	switch (mode) {

	case 0 ... 3:

		return addr40 ? 38 : 30;

	default:

		return -EINVAL;

	}

}



int nfp_target_pushpull(u32 cpp_id, u64 address);

int nfp_target_cpp(u32 cpp_island_id, u64 cpp_island_address,

		   u32 *cpp_target_id, u64 *cpp_target_address,

		   const u32 *imb_table);



#endif /* NFP6000_NFP6000_H */

drivers/net/ethernet/netronome/nfp/nfpcore/nfp6000/nfp_xpb.h

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Original line number Diff line number Diff line 
/*

 * Copyright (C) 2015-2017 Netronome Systems, Inc.

 *

 * This software is dual licensed under the GNU General License Version 2,

 * June 1991 as shown in the file COPYING in the top-level directory of this

 * source tree or the BSD 2-Clause License provided below.  You have the

 * option to license this software under the complete terms of either license.

 *

 * The BSD 2-Clause License:

 *

 *     Redistribution and use in source and binary forms, with or

 *     without modification, are permitted provided that the following

 *     conditions are met:

 *

 *      1. Redistributions of source code must retain the above

 *         copyright notice, this list of conditions and the following

 *         disclaimer.

 *

 *      2. Redistributions in binary form must reproduce the above

 *         copyright notice, this list of conditions and the following

 *         disclaimer in the documentation and/or other materials

 *         provided with the distribution.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

 * SOFTWARE.

 */



/*

 * nfp_xpb.h

 * Author: Jason McMullan <jason.mcmullan@netronome.com>

 */



#ifndef NFP6000_XPB_H

#define NFP6000_XPB_H



/* For use with NFP6000 Databook "XPB Addressing" section

 */

#define NFP_XPB_OVERLAY(island)  (((island) & 0x3f) << 24)



#define NFP_XPB_ISLAND(island)   (NFP_XPB_OVERLAY(island) + 0x60000)



#define NFP_XPB_ISLAND_of(offset) (((offset) >> 24) & 0x3F)



/* For use with NFP6000 Databook "XPB Island and Device IDs" chapter

 */

#define NFP_XPB_DEVICE(island, slave, device) \

	(NFP_XPB_OVERLAY(island) | \

	 (((slave) & 3) << 22) | \

	 (((device) & 0x3f) << 16))



#endif /* NFP6000_XPB_H */

drivers/net/ethernet/netronome/nfp/nfpcore/nfp6000_pcie.c

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File added.

Preview size limit exceeded, changes collapsed.

drivers/net/ethernet/netronome/nfp/nfpcore/nfp6000_pcie.h

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Original line number Diff line number Diff line 
/*

 * Copyright (C) 2015-2017 Netronome Systems, Inc.

 *

 * This software is dual licensed under the GNU General License Version 2,

 * June 1991 as shown in the file COPYING in the top-level directory of this

 * source tree or the BSD 2-Clause License provided below.  You have the

 * option to license this software under the complete terms of either license.

 *

 * The BSD 2-Clause License:

 *

 *     Redistribution and use in source and binary forms, with or

 *     without modification, are permitted provided that the following

 *     conditions are met:

 *

 *      1. Redistributions of source code must retain the above

 *         copyright notice, this list of conditions and the following

 *         disclaimer.

 *

 *      2. Redistributions in binary form must reproduce the above

 *         copyright notice, this list of conditions and the following

 *         disclaimer in the documentation and/or other materials

 *         provided with the distribution.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

 * SOFTWARE.

 */



/*

 * nfp6000_pcie.h

 * Author: Jason McMullan <jason.mcmullan@netronome.com>

 */



#ifndef NFP6000_PCIE_H

#define NFP6000_PCIE_H



#include "nfp_cpp.h"



struct nfp_cpp *nfp_cpp_from_nfp6000_pcie(struct pci_dev *pdev);



#endif /* NFP6000_PCIE_H */