Release 4.7 drivers/net/ethernet/apm/xgene/xgene_enet_ring2.c

Directory: drivers/net/ethernet/apm/xgene
/* 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);
}

Contributors
Person Tokens Prop Commits CommitProp
iyappan subramanian iyappan subramanian 149 100.00% 1 100.00%
Total 149 100.00% 1 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
iyappan subramanian iyappan subramanian 72 100.00% 1 100.00%
Total 72 100.00% 1 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
iyappan subramanian iyappan subramanian 38 100.00% 1 100.00%
Total 38 100.00% 1 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
iyappan subramanian iyappan subramanian 40 100.00% 1 100.00%
Total 40 100.00% 1 100.00%



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]);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
iyappan subramanian iyappan subramanian 76 100.00% 1 100.00%
Total 76 100.00% 1 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
iyappan subramanian iyappan subramanian 32 100.00% 1 100.00%
Total 32 100.00% 1 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
iyappan subramanian iyappan subramanian 54 100.00% 1 100.00%
Total 54 100.00% 1 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
iyappan subramanian iyappan subramanian 104 100.00% 1 100.00%
Total 104 100.00% 1 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
iyappan subramanian iyappan subramanian 40 100.00% 1 100.00%
Total 40 100.00% 1 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
iyappan subramanian iyappan subramanian 134 100.00% 1 100.00%
Total 134 100.00% 1 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
iyappan subramanian iyappan subramanian 21 100.00% 1 100.00%
Total 21 100.00% 1 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
iyappan subramanian iyappan subramanian 69 100.00% 1 100.00%
Total 69 100.00% 1 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
iyappan subramanian iyappan subramanian 48 100.00% 1 100.00%
Total 48 100.00% 1 100.00%



static void xgene_enet_setup_coalescing(struct xgene_enet_desc_ring *ring)
{
	u32 data = 0x7777;

	xgene_enet_ring_wr32(ring, CSR_PBM_COAL, 0x8e);
	xgene_enet_ring_wr32(ring, CSR_PBM_CTICK1, data);
	xgene_enet_ring_wr32(ring, CSR_PBM_CTICK2, data << 16);
	xgene_enet_ring_wr32(ring, CSR_THRESHOLD0_SET1, 0x40);
	xgene_enet_ring_wr32(ring, CSR_THRESHOLD1_SET1, 0x80);
}

Contributors
Person Tokens Prop Commits CommitProp
iyappan subramanian iyappan subramanian 63 100.00% 1 100.00%
Total 63 100.00% 1 100.00%


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,
	.coalesce = xgene_enet_setup_coalescing,
};
Overall Contributors
Person Tokens Prop Commits CommitProp
iyappan subramanian iyappan subramanian 991 100.00% 2 100.00%
Total 991 100.00% 2 100.00%
  Directory: drivers/net/ethernet/apm/xgene

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
iyappan subramanian	iyappan subramanian	149	100.00%	1	100.00%
	Total	149	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.7 drivers/net/ethernet/apm/xgene/xgene_enet_ring2.c

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