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Message-ID: <38090ee4-30c2-46b3-b16d-ae0836c640ca@kernel.org>
Date: Mon, 26 Feb 2024 19:26:45 +0200
From: Roger Quadros <rogerq@...nel.org>
To: Diogo Ivo <diogo.ivo@...mens.com>, danishanwar@...com,
davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
pabeni@...hat.com, andrew@...n.ch, dan.carpenter@...aro.org,
linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org
Cc: jan.kiszka@...mens.com
Subject: Re: [PATCH net-next v3 08/10] net: ti: icssg-prueth: Add functions to
configure SR1.0 packet classifier
On 21/02/2024 17:24, Diogo Ivo wrote:
> Add the functions to configure the SR1.0 packet classifier.
>
> Based on the work of Roger Quadros in TI's 5.10 SDK [1].
>
> [1]: https://git.ti.com/cgit/ti-linux-kernel/ti-linux-kernel/tree/?h=ti-linux-5.10.y
>
> Co-developed-by: Jan Kiszka <jan.kiszka@...mens.com>
> Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
> Signed-off-by: Diogo Ivo <diogo.ivo@...mens.com>
> ---
> Changes in v3:
> - Replace local variables in icssg_class_add_mcast_sr1()
> with eth_reserved_addr_base and eth_ipv4_mcast_addr_base
>
> .../net/ethernet/ti/icssg/icssg_classifier.c | 113 ++++++++++++++++--
> drivers/net/ethernet/ti/icssg/icssg_prueth.c | 2 +-
> drivers/net/ethernet/ti/icssg/icssg_prueth.h | 6 +-
> 3 files changed, 110 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/net/ethernet/ti/icssg/icssg_classifier.c b/drivers/net/ethernet/ti/icssg/icssg_classifier.c
> index 6df53ab17fbc..71b2f89ccd8e 100644
> --- a/drivers/net/ethernet/ti/icssg/icssg_classifier.c
> +++ b/drivers/net/ethernet/ti/icssg/icssg_classifier.c
> @@ -274,6 +274,16 @@ static void rx_class_set_or(struct regmap *miig_rt, int slice, int n,
> regmap_write(miig_rt, offset, data);
> }
>
> +static u32 rx_class_get_or(struct regmap *miig_rt, int slice, int n)
> +{
> + u32 offset, val;
> +
> + offset = RX_CLASS_N_REG(slice, n, RX_CLASS_OR_EN);
> + regmap_read(miig_rt, offset, &val);
> +
> + return val;
> +}
> +
> void icssg_class_set_host_mac_addr(struct regmap *miig_rt, const u8 *mac)
> {
> regmap_write(miig_rt, MAC_INTERFACE_0, (u32)(mac[0] | mac[1] << 8 |
> @@ -288,6 +298,26 @@ void icssg_class_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac)
> regmap_write(miig_rt, offs[slice].mac1, (u32)(mac[4] | mac[5] << 8));
> }
>
> +static void icssg_class_ft1_add_mcast(struct regmap *miig_rt, int slice,
> + int slot, const u8 *addr, const u8 *mask)
> +{
> + int i;
> + u32 val;
> +
> + WARN(slot >= FT1_NUM_SLOTS, "invalid slot: %d\n", slot);
> +
> + rx_class_ft1_set_da(miig_rt, slice, slot, addr);
> + rx_class_ft1_set_da_mask(miig_rt, slice, slot, mask);
> + rx_class_ft1_cfg_set_type(miig_rt, slice, slot, FT1_CFG_TYPE_EQ);
> +
> + /* Enable the FT1 slot in OR enable for all classifiers */
> + for (i = 0; i < ICSSG_NUM_CLASSIFIERS_IN_USE; i++) {
> + val = rx_class_get_or(miig_rt, slice, i);
> + val |= RX_CLASS_FT_FT1_MATCH(slot);
> + rx_class_set_or(miig_rt, slice, i, val);
> + }
> +}
> +
> /* disable all RX traffic */
> void icssg_class_disable(struct regmap *miig_rt, int slice)
> {
> @@ -331,30 +361,95 @@ void icssg_class_disable(struct regmap *miig_rt, int slice)
> regmap_write(miig_rt, offs[slice].rx_class_cfg2, 0);
> }
>
> -void icssg_class_default(struct regmap *miig_rt, int slice, bool allmulti)
> +void icssg_class_default(struct regmap *miig_rt, int slice, bool allmulti,
> + bool is_sr1)
> {
> + int num_classifiers = is_sr1 ? ICSSG_NUM_CLASSIFIERS_IN_USE : 1;
> u32 data;
> + int n;
>
> /* defaults */
> icssg_class_disable(miig_rt, slice);
>
> /* Setup Classifier */
> - /* match on Broadcast or MAC_PRU address */
> - data = RX_CLASS_FT_BC | RX_CLASS_FT_DA_P;
> + for (n = 0; n < num_classifiers; n++) {
> + /* match on Broadcast or MAC_PRU address */
> + data = RX_CLASS_FT_BC | RX_CLASS_FT_DA_P;
>
> - /* multicast */
> - if (allmulti)
> - data |= RX_CLASS_FT_MC;
> + /* multicast */
> + if (allmulti)
> + data |= RX_CLASS_FT_MC;
>
> - rx_class_set_or(miig_rt, slice, 0, data);
> + rx_class_set_or(miig_rt, slice, n, data);
>
> - /* set CFG1 for OR_OR_AND for classifier */
> - rx_class_sel_set_type(miig_rt, slice, 0, RX_CLASS_SEL_TYPE_OR_OR_AND);
> + /* set CFG1 for OR_OR_AND for classifier */
> + rx_class_sel_set_type(miig_rt, slice, n,
> + RX_CLASS_SEL_TYPE_OR_OR_AND);
> + }
>
> /* clear CFG2 */
> regmap_write(miig_rt, offs[slice].rx_class_cfg2, 0);
> }
>
> +void icssg_class_promiscuous_sr1(struct regmap *miig_rt, int slice)
> +{
> + u32 data, offset;
> + int n;
> +
> + /* defaults */
> + icssg_class_disable(miig_rt, slice);
> +
> + /* Setup Classifier */
> + for (n = 0; n < ICSSG_NUM_CLASSIFIERS_IN_USE; n++) {
> + /* set RAW_MASK to bypass filters */
> + offset = RX_CLASS_GATES_N_REG(slice, n);
> + regmap_read(miig_rt, offset, &data);
> + data |= RX_CLASS_GATES_RAW_MASK;
> + regmap_write(miig_rt, offset, data);
> + }
> +}
> +
> +void icssg_class_add_mcast_sr1(struct regmap *miig_rt, int slice,
> + struct net_device *ndev)
> +{
> + u8 mask_addr[6] = { 0, 0, 0, 0, 0, 0xff };
> + struct netdev_hw_addr *ha;
> + int slot = 2;
> +
> + rx_class_ft1_set_start_len(miig_rt, slice, 0, 6);
> + /* reserve first 2 slots for
> + * 1) 01-80-C2-00-00-XX Known Service Ethernet Multicast addresses
> + * 2) 01-00-5e-00-00-XX Local Network Control Block
> + * (224.0.0.0 - 224.0.0.255 (224.0.0/24))
> + */
> + icssg_class_ft1_add_mcast(miig_rt, slice, 0,
> + eth_reserved_addr_base, mask_addr);
> + icssg_class_ft1_add_mcast(miig_rt, slice, 1,
> + eth_ipv4_mcast_addr_base, mask_addr);
> + mask_addr[5] = 0;
> + netdev_for_each_mc_addr(ha, ndev) {
> + /* skip addresses matching reserved slots */
> + if (!memcmp(eth_reserved_addr_base, ha->addr, 5) ||
> + !memcmp(eth_ipv4_mcast_addr_base, ha->addr, 5)) {
> + netdev_dbg(ndev, "mcast skip %pM\n", ha->addr);
> + continue;
> + }
> +
> + if (slot >= FT1_NUM_SLOTS) {
> + netdev_dbg(ndev,
> + "can't add more than %d MC addresses, enabling allmulti\n",
> + FT1_NUM_SLOTS);
> + icssg_class_default(miig_rt, slice, 1, true);
> + break;
> + }
> +
> + netdev_dbg(ndev, "mcast add %pM\n", ha->addr);
> + icssg_class_ft1_add_mcast(miig_rt, slice, slot,
> + ha->addr, mask_addr);
> + slot++;
> + }
> +}
> +
> /* required for SAV check */
> void icssg_ft1_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac_addr)
> {
> diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.c b/drivers/net/ethernet/ti/icssg/icssg_prueth.c
> index e6eac01f9f99..7d9db9683e18 100644
> --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.c
> +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.c
> @@ -437,7 +437,7 @@ static int emac_ndo_open(struct net_device *ndev)
> icssg_class_set_mac_addr(prueth->miig_rt, slice, emac->mac_addr);
> icssg_ft1_set_mac_addr(prueth->miig_rt, slice, emac->mac_addr);
>
> - icssg_class_default(prueth->miig_rt, slice, 0);
> + icssg_class_default(prueth->miig_rt, slice, 0, false);
Should you be passing emac->is_sr1 instead of false?
>
> /* Notify the stack of the actual queue counts. */
> ret = netif_set_real_num_tx_queues(ndev, num_data_chn);
> diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.h b/drivers/net/ethernet/ti/icssg/icssg_prueth.h
> index a8192e408941..faefd9351c39 100644
> --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.h
> +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.h
> @@ -283,7 +283,11 @@ extern const struct dev_pm_ops prueth_dev_pm_ops;
> void icssg_class_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac);
> void icssg_class_set_host_mac_addr(struct regmap *miig_rt, const u8 *mac);
> void icssg_class_disable(struct regmap *miig_rt, int slice);
> -void icssg_class_default(struct regmap *miig_rt, int slice, bool allmulti);
> +void icssg_class_default(struct regmap *miig_rt, int slice, bool allmulti,
> + bool is_sr1);
> +void icssg_class_promiscuous_sr1(struct regmap *miig_rt, int slice);
> +void icssg_class_add_mcast_sr1(struct regmap *miig_rt, int slice,
> + struct net_device *ndev);
> void icssg_ft1_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac_addr);
>
> /* config helpers */
--
cheers,
-roger
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