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Commit ed9b7da0 authored by Iyappan Subramanian's avatar Iyappan Subramanian Committed by David S. Miller
Browse files

drivers: net: xgene: Add ring manager v2 functions 



Adding ring manager v2 support for APM X-Gene ethernet driver.

Signed-off-by: default avatarIyappan Subramanian <isubramanian@apm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 81cefb81

drivers/net/ethernet/apm/xgene/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -3,5 +3,5 @@ 
#



xgene-enet-objs := xgene_enet_hw.o xgene_enet_sgmac.o xgene_enet_xgmac.o \

		   xgene_enet_main.o xgene_enet_ethtool.o

		   xgene_enet_main.o xgene_enet_ring2.o xgene_enet_ethtool.o

obj-$(CONFIG_NET_XGENE) += xgene-enet.o

drivers/net/ethernet/apm/xgene/xgene_enet_hw.h

+1 −0
Original line number Diff line number Diff line
@@ -262,6 +262,7 @@ enum xgene_enet_ring_type { 


enum xgene_ring_owner {

	RING_OWNER_ETH0,

	RING_OWNER_ETH1,

	RING_OWNER_CPU = 15,

	RING_OWNER_INVALID

};

drivers/net/ethernet/apm/xgene/xgene_enet_main.h

+2 −0
Original line number Diff line number Diff line
@@ -72,6 +72,8 @@ struct xgene_enet_desc_ring { 
	void __iomem *cmd_base;

	void __iomem *cmd;

	dma_addr_t dma;

	dma_addr_t irq_mbox_dma;

	void *irq_mbox_addr;

	u16 dst_ring_num;

	u8 nbufpool;

	struct sk_buff *(*rx_skb);

drivers/net/ethernet/apm/xgene/xgene_enet_ring2.c

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+200 −0
Original line number Diff line number Diff line 
/* Applied Micro X-Gene SoC Ethernet Driver

 *

 * Copyright (c) 2015, Applied Micro Circuits Corporation

 * Author: Iyappan Subramanian <isubramanian@apm.com>

 *

 * This program is free software; you can redistribute  it and/or modify it

 * under  the terms of  the GNU General  Public License as published by the

 * Free Software Foundation;  either version 2 of the  License, or (at your

 * option) any later version.

 *

 * This program is distributed in the hope that 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/>.

 */



#include "xgene_enet_main.h"

#include "xgene_enet_hw.h"

#include "xgene_enet_ring2.h"



static void xgene_enet_ring_init(struct xgene_enet_desc_ring *ring)

{

	u32 *ring_cfg = ring->state;

	u64 addr = ring->dma;



	if (xgene_enet_ring_owner(ring->id) == RING_OWNER_CPU) {

		ring_cfg[0] |= SET_VAL(X2_INTLINE, ring->id & RING_BUFNUM_MASK);

		ring_cfg[3] |= SET_BIT(X2_DEQINTEN);

	}

	ring_cfg[0] |= SET_VAL(X2_CFGCRID, 1);



	addr >>= 8;

	ring_cfg[2] |= QCOHERENT | SET_VAL(RINGADDRL, addr);



	addr >>= 27;

	ring_cfg[3] |= SET_VAL(RINGSIZE, ring->cfgsize)

		    | ACCEPTLERR

		    | SET_VAL(RINGADDRH, addr);

	ring_cfg[4] |= SET_VAL(X2_SELTHRSH, 1);

	ring_cfg[5] |= SET_BIT(X2_QBASE_AM) | SET_BIT(X2_MSG_AM);

}



static void xgene_enet_ring_set_type(struct xgene_enet_desc_ring *ring)

{

	u32 *ring_cfg = ring->state;

	bool is_bufpool;

	u32 val;



	is_bufpool = xgene_enet_is_bufpool(ring->id);

	val = (is_bufpool) ? RING_BUFPOOL : RING_REGULAR;

	ring_cfg[4] |= SET_VAL(X2_RINGTYPE, val);

	if (is_bufpool)

		ring_cfg[3] |= SET_VAL(RINGMODE, BUFPOOL_MODE);

}



static void xgene_enet_ring_set_recombbuf(struct xgene_enet_desc_ring *ring)

{

	u32 *ring_cfg = ring->state;



	ring_cfg[3] |= RECOMBBUF;

	ring_cfg[4] |= SET_VAL(X2_RECOMTIMEOUT, 0x7);

}



static void xgene_enet_ring_wr32(struct xgene_enet_desc_ring *ring,

				 u32 offset, u32 data)

{

	struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev);



	iowrite32(data, pdata->ring_csr_addr + offset);

}



static void xgene_enet_write_ring_state(struct xgene_enet_desc_ring *ring)

{

	struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev);

	int i;



	xgene_enet_ring_wr32(ring, CSR_RING_CONFIG, ring->num);

	for (i = 0; i < pdata->ring_ops->num_ring_config; i++) {

		xgene_enet_ring_wr32(ring, CSR_RING_WR_BASE + (i * 4),

				     ring->state[i]);

	}

}



static void xgene_enet_clr_ring_state(struct xgene_enet_desc_ring *ring)

{

	memset(ring->state, 0, sizeof(ring->state));

	xgene_enet_write_ring_state(ring);

}



static void xgene_enet_set_ring_state(struct xgene_enet_desc_ring *ring)

{

	enum xgene_ring_owner owner;



	xgene_enet_ring_set_type(ring);



	owner = xgene_enet_ring_owner(ring->id);

	if (owner == RING_OWNER_ETH0 || owner == RING_OWNER_ETH1)

		xgene_enet_ring_set_recombbuf(ring);



	xgene_enet_ring_init(ring);

	xgene_enet_write_ring_state(ring);

}



static void xgene_enet_set_ring_id(struct xgene_enet_desc_ring *ring)

{

	u32 ring_id_val, ring_id_buf;

	bool is_bufpool;



	if (xgene_enet_ring_owner(ring->id) == RING_OWNER_CPU)

		return;



	is_bufpool = xgene_enet_is_bufpool(ring->id);



	ring_id_val = ring->id & GENMASK(9, 0);

	ring_id_val |= OVERWRITE;



	ring_id_buf = (ring->num << 9) & GENMASK(18, 9);

	ring_id_buf |= PREFETCH_BUF_EN;

	if (is_bufpool)

		ring_id_buf |= IS_BUFFER_POOL;



	xgene_enet_ring_wr32(ring, CSR_RING_ID, ring_id_val);

	xgene_enet_ring_wr32(ring, CSR_RING_ID_BUF, ring_id_buf);

}



static void xgene_enet_clr_desc_ring_id(struct xgene_enet_desc_ring *ring)

{

	u32 ring_id;



	ring_id = ring->id | OVERWRITE;

	xgene_enet_ring_wr32(ring, CSR_RING_ID, ring_id);

	xgene_enet_ring_wr32(ring, CSR_RING_ID_BUF, 0);

}



static struct xgene_enet_desc_ring *xgene_enet_setup_ring(

				    struct xgene_enet_desc_ring *ring)

{

	bool is_bufpool;

	u32 addr, i;



	xgene_enet_clr_ring_state(ring);

	xgene_enet_set_ring_state(ring);

	xgene_enet_set_ring_id(ring);



	ring->slots = xgene_enet_get_numslots(ring->id, ring->size);



	is_bufpool = xgene_enet_is_bufpool(ring->id);

	if (is_bufpool || xgene_enet_ring_owner(ring->id) != RING_OWNER_CPU)

		return ring;



	addr = CSR_VMID0_INTR_MBOX + (4 * (ring->id & RING_BUFNUM_MASK));

	xgene_enet_ring_wr32(ring, addr, ring->irq_mbox_dma >> 10);



	for (i = 0; i < ring->slots; i++)

		xgene_enet_mark_desc_slot_empty(&ring->raw_desc[i]);



	return ring;

}



static void xgene_enet_clear_ring(struct xgene_enet_desc_ring *ring)

{

	xgene_enet_clr_desc_ring_id(ring);

	xgene_enet_clr_ring_state(ring);

}



static void xgene_enet_wr_cmd(struct xgene_enet_desc_ring *ring, int count)

{

	u32 data = 0;



	if (xgene_enet_ring_owner(ring->id) == RING_OWNER_CPU) {

		data = SET_VAL(X2_INTLINE, ring->id & RING_BUFNUM_MASK) |

		       INTR_CLEAR;

	}

	data |= (count & GENMASK(16, 0));



	iowrite32(data, ring->cmd);

}



static u32 xgene_enet_ring_len(struct xgene_enet_desc_ring *ring)

{

	u32 __iomem *cmd_base = ring->cmd_base;

	u32 ring_state, num_msgs;



	ring_state = ioread32(&cmd_base[1]);

	num_msgs = GET_VAL(X2_NUMMSGSINQ, ring_state);



	return num_msgs;

}



struct xgene_ring_ops xgene_ring2_ops = {

	.num_ring_config = X2_NUM_RING_CONFIG,

	.num_ring_id_shift = 13,

	.setup = xgene_enet_setup_ring,

	.clear = xgene_enet_clear_ring,

	.wr_cmd = xgene_enet_wr_cmd,

	.len = xgene_enet_ring_len,

};

drivers/net/ethernet/apm/xgene/xgene_enet_ring2.h

0 → 100644
+49 −0
Original line number Diff line number Diff line 
/* Applied Micro X-Gene SoC Ethernet Driver

 *

 * Copyright (c) 2015, Applied Micro Circuits Corporation

 * Author: Iyappan Subramanian <isubramanian@apm.com>

 *

 * This program is free software; you can redistribute  it and/or modify it

 * under  the terms of  the GNU General  Public License as published by the

 * Free Software Foundation;  either version 2 of the  License, or (at your

 * option) any later version.

 *

 * This program is distributed in the hope that 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/>.

 */



#ifndef __XGENE_ENET_RING2_H__

#define __XGENE_ENET_RING2_H__



#include "xgene_enet_main.h"



#define X2_NUM_RING_CONFIG	6



#define INTR_MBOX_SIZE		1024

#define CSR_VMID0_INTR_MBOX	0x0270

#define INTR_CLEAR		BIT(23)



#define X2_MSG_AM_POS		10

#define X2_QBASE_AM_POS		11

#define X2_INTLINE_POS		24

#define X2_INTLINE_LEN		5

#define X2_CFGCRID_POS		29

#define X2_CFGCRID_LEN		3

#define X2_SELTHRSH_POS		7

#define X2_SELTHRSH_LEN		3

#define X2_RINGTYPE_POS		23

#define X2_RINGTYPE_LEN		2

#define X2_DEQINTEN_POS		29

#define X2_RECOMTIMEOUT_POS	0

#define X2_RECOMTIMEOUT_LEN	7

#define X2_NUMMSGSINQ_POS	0

#define X2_NUMMSGSINQ_LEN	17



extern struct xgene_ring_ops xgene_ring2_ops;



#endif /* __XGENE_ENET_RING2_H__ */