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Revert "net: bcmgenet: remove unused function in bcmgenet.c"

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This reverts commit e2072600a2.

This commit restores the previous implementation of Hardware Filter
Block functions to the file for use in subsequent commits.

Signed-off-by: Doug Berger <opendmb@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Doug Berger 2020-04-29 13:02:03 -07:00 committed by David S. Miller
parent 1a1d5106c1
commit 14da1510fe
1 changed files with 122 additions and 0 deletions
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122
drivers/net/ethernet/broadcom/genet/bcmgenet.c
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@ -2759,6 +2759,128 @@ static void bcmgenet_enable_dma(struct bcmgenet_priv *priv, u32 dma_ctrl)
bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
}
static bool bcmgenet_hfb_is_filter_enabled(struct bcmgenet_priv *priv,
u32 f_index)
{
u32 offset;
u32 reg;
offset = HFB_FLT_ENABLE_V3PLUS + (f_index < 32) * sizeof(u32);
reg = bcmgenet_hfb_reg_readl(priv, offset);
return !!(reg & (1 << (f_index % 32)));
}
static void bcmgenet_hfb_enable_filter(struct bcmgenet_priv *priv, u32 f_index)
{
u32 offset;
u32 reg;
offset = HFB_FLT_ENABLE_V3PLUS + (f_index < 32) * sizeof(u32);
reg = bcmgenet_hfb_reg_readl(priv, offset);
reg |= (1 << (f_index % 32));
bcmgenet_hfb_reg_writel(priv, reg, offset);
}
static void bcmgenet_hfb_set_filter_rx_queue_mapping(struct bcmgenet_priv *priv,
u32 f_index, u32 rx_queue)
{
u32 offset;
u32 reg;
offset = f_index / 8;
reg = bcmgenet_rdma_readl(priv, DMA_INDEX2RING_0 + offset);
reg &= ~(0xF << (4 * (f_index % 8)));
reg |= ((rx_queue & 0xF) << (4 * (f_index % 8)));
bcmgenet_rdma_writel(priv, reg, DMA_INDEX2RING_0 + offset);
}
static void bcmgenet_hfb_set_filter_length(struct bcmgenet_priv *priv,
u32 f_index, u32 f_length)
{
u32 offset;
u32 reg;
offset = HFB_FLT_LEN_V3PLUS +
((priv->hw_params->hfb_filter_cnt - 1 - f_index) / 4) *
sizeof(u32);
reg = bcmgenet_hfb_reg_readl(priv, offset);
reg &= ~(0xFF << (8 * (f_index % 4)));
reg |= ((f_length & 0xFF) << (8 * (f_index % 4)));
bcmgenet_hfb_reg_writel(priv, reg, offset);
}
static int bcmgenet_hfb_find_unused_filter(struct bcmgenet_priv *priv)
{
u32 f_index;
for (f_index = 0; f_index < priv->hw_params->hfb_filter_cnt; f_index++)
if (!bcmgenet_hfb_is_filter_enabled(priv, f_index))
return f_index;
return -ENOMEM;
}
/* bcmgenet_hfb_add_filter
*
* Add new filter to Hardware Filter Block to match and direct Rx traffic to
* desired Rx queue.
*
* f_data is an array of unsigned 32-bit integers where each 32-bit integer
* provides filter data for 2 bytes (4 nibbles) of Rx frame:
*
* bits 31:20 - unused
* bit 19 - nibble 0 match enable
* bit 18 - nibble 1 match enable
* bit 17 - nibble 2 match enable
* bit 16 - nibble 3 match enable
* bits 15:12 - nibble 0 data
* bits 11:8 - nibble 1 data
* bits 7:4 - nibble 2 data
* bits 3:0 - nibble 3 data
*
* Example:
* In order to match:
* - Ethernet frame type = 0x0800 (IP)
* - IP version field = 4
* - IP protocol field = 0x11 (UDP)
*
* The following filter is needed:
* u32 hfb_filter_ipv4_udp[] = {
* Rx frame offset 0x00: 0x00000000, 0x00000000, 0x00000000, 0x00000000,
* Rx frame offset 0x08: 0x00000000, 0x00000000, 0x000F0800, 0x00084000,
* Rx frame offset 0x10: 0x00000000, 0x00000000, 0x00000000, 0x00030011,
* };
*
* To add the filter to HFB and direct the traffic to Rx queue 0, call:
* bcmgenet_hfb_add_filter(priv, hfb_filter_ipv4_udp,
* ARRAY_SIZE(hfb_filter_ipv4_udp), 0);
*/
int bcmgenet_hfb_add_filter(struct bcmgenet_priv *priv, u32 *f_data,
u32 f_length, u32 rx_queue)
{
int f_index;
u32 i;
f_index = bcmgenet_hfb_find_unused_filter(priv);
if (f_index < 0)
return -ENOMEM;
if (f_length > priv->hw_params->hfb_filter_size)
return -EINVAL;
for (i = 0; i < f_length; i++)
bcmgenet_hfb_writel(priv, f_data[i],
(f_index * priv->hw_params->hfb_filter_size + i) *
sizeof(u32));
bcmgenet_hfb_set_filter_length(priv, f_index, 2 * f_length);
bcmgenet_hfb_set_filter_rx_queue_mapping(priv, f_index, rx_queue);
bcmgenet_hfb_enable_filter(priv, f_index);
bcmgenet_hfb_reg_writel(priv, 0x1, HFB_CTRL);
return 0;
}
/* bcmgenet_hfb_clear
*
* Clear Hardware Filter Block and disable all filtering.