Re: [PATCH net-next v2 1/1] net: stmmac: Check more MAC HW features for XGMAC Core 3.20
From: Serge Semin
Date: Mon Aug 21 2023 - 08:11:26 EST
Hi Furong
Having changes enumerated in the patch log is an implicit sign
that the patch solves several problems at a time. Please split them up
into dedicated patches.
On Sat, Aug 19, 2023 at 06:54:40PM +0800, Furong Xu wrote:
> 1. XGMAC Core does not have hash_filter definition, it uses
> vlhash(VLAN Hash Filtering) instead, skip hash_filter when XGMAC.
Because these a completely different flags.
"hash_filter" indicates an availability of the HASH-based MAC-address
filters in DW (G)MAC IP-cores by means of the HASHSEL flag available
in "Register 22 HW Feature Register".
"vlhash" indicates the HASH-based VLAN ID filters in DW QoS Eth and DW
XGMAC IP-cores by means of the VLHASH flag available in
the MAC_HW_Feature0 register.
DW xGMAC and DW QoS Eth use hash_tb_sz field as the HASH-based
MAC-address filter indicator. It's zero if there is no HASH-based
filter available in the controller. So your fix is a half measure
only.
> 2. Show exact size of Hash Table instead of raw register value.
> 3. Show full description of safety features defined by Synopsys Databook.
> 4. When safety feature is configured with no parity, or ECC only,
> keep FSM Parity Checking disabled.
This change looks as a significant alteration of the DW XGMAC v3.x
Safety Feature configuration procedure. It must be in a separate
patch in order to be independently revertable in case of regressions.
The description in the patch log doesn't include all the changes
provided by the patch itself. Once again please split the changes up.
>
> Signed-off-by: Furong Xu <0x1207@xxxxxxxxx>
> ---
> Changes in v2:
> - Rebase patch on net-next. Thanks Simon :)
> ---
> drivers/net/ethernet/stmicro/stmmac/common.h | 36 ++++++++++
> .../net/ethernet/stmicro/stmmac/dwxgmac2.h | 21 ++++++
> .../ethernet/stmicro/stmmac/dwxgmac2_core.c | 6 +-
> .../ethernet/stmicro/stmmac/dwxgmac2_dma.c | 23 ++++++
> .../net/ethernet/stmicro/stmmac/stmmac_main.c | 71 +++++++++++++++++--
> 5 files changed, 149 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h
> index 1f5293c8cc04..403cb397d4d3 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/common.h
> +++ b/drivers/net/ethernet/stmicro/stmmac/common.h
> @@ -410,6 +410,18 @@ struct dma_features {
> unsigned int number_tx_queues;
> /* PPS output */
> unsigned int pps_out_num;
> + /* Number of Traffic Classes */
> + unsigned int numtc;
> + /* DCB Feature Enable */
> + unsigned int dcben;
> + /* IEEE 1588 High Word Register Enable */
> + unsigned int advthword;
> + /* PTP Offload Enable */
> + unsigned int ptoen;
> + /* One-Step Timestamping Enable */
> + unsigned int osten;
> + /* Priority-Based Flow Control Enable */
> + unsigned int pfcen;
> /* Alternate (enhanced) DESC mode */
> unsigned int enh_desc;
> /* TX and RX FIFO sizes */
> @@ -430,16 +442,40 @@ struct dma_features {
> unsigned int dvlan;
> unsigned int l3l4fnum;
> unsigned int arpoffsel;
> + /* One Step for PTP over UDP/IP Feature Enable */
> + unsigned int pou_ost_en;
> + /* Tx Timestamp FIFO Depth */
> + unsigned int ttsfd;
> + /* Queue/Channel-Based VLAN tag insertion on Tx */
> + unsigned int cbtisel;
> + /* Supported Parallel Instruction Processor Engines */
> + unsigned int frppipe_num;
> + /* Number of Extended VLAN Tag Filters */
> + unsigned int nrvf_num;
> /* TSN Features */
> unsigned int estwid;
> unsigned int estdep;
> unsigned int estsel;
> unsigned int fpesel;
> unsigned int tbssel;
> + /* Number of DMA channels enabled for TBS */
> + unsigned int tbs_ch_num;
> + /* Per-Stream Filtering Enable */
> + unsigned int sgfsel;
> /* Numbers of Auxiliary Snapshot Inputs */
> unsigned int aux_snapshot_n;
> /* Timestamp System Time Source */
> unsigned int tssrc;
> + /* Enhanced DMA Enable */
> + unsigned int edma;
> + /* Different Descriptor Cache Enable */
> + unsigned int ediffc;
> + /* VxLAN/NVGRE Enable */
> + unsigned int vxn;
> + /* Debug Memory Interface Enable */
> + unsigned int dbgmem;
> + /* Number of Policing Counters */
> + unsigned int pcsel;
All of these have little value since unused by the driver in anyway
but only printed by the DbgFS features node.
> };
>
> /* RX Buffer size must be multiple of 4/8/16 bytes */
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
> index 7f68bef456b7..7a8f47e7b728 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
> @@ -122,6 +122,9 @@
> #define XGMAC_TLPIEN BIT(0)
> #define XGMAC_LPI_TIMER_CTRL 0x000000d4
> #define XGMAC_HW_FEATURE0 0x0000011c
> +#define XGMAC_HWFEAT_EDMA BIT(31)
> +#define XGMAC_HWFEAT_EDIFFC BIT(30)
> +#define XGMAC_HWFEAT_VXN BIT(29)
> #define XGMAC_HWFEAT_SAVLANINS BIT(27)
> #define XGMAC_HWFEAT_TSSTSSEL GENMASK(26, 25)
> #define XGMAC_HWFEAT_ADDMACADRSEL GENMASK(22, 18)
> @@ -142,29 +145,47 @@
> #define XGMAC_HW_FEATURE1 0x00000120
> #define XGMAC_HWFEAT_L3L4FNUM GENMASK(30, 27)
> #define XGMAC_HWFEAT_HASHTBLSZ GENMASK(25, 24)
> +#define XGMAC_HWFEAT_NUMTC GENMASK(23, 21)
> #define XGMAC_HWFEAT_RSSEN BIT(20)
> +#define XGMAC_HWFEAT_DBGMEMA BIT(19)
> #define XGMAC_HWFEAT_TSOEN BIT(18)
> #define XGMAC_HWFEAT_SPHEN BIT(17)
> +#define XGMAC_HWFEAT_DCBEN BIT(16)
> #define XGMAC_HWFEAT_ADDR64 GENMASK(15, 14)
> +#define XGMAC_HWFEAT_ADVTHWORD BIT(13)
> +#define XGMAC_HWFEAT_PTOEN BIT(12)
> +#define XGMAC_HWFEAT_OSTEN BIT(11)
> #define XGMAC_HWFEAT_TXFIFOSIZE GENMASK(10, 6)
> +#define XGMAC_HWFEAT_PFCEN BIT(5)
> #define XGMAC_HWFEAT_RXFIFOSIZE GENMASK(4, 0)
> #define XGMAC_HW_FEATURE2 0x00000124
> +#define XGMAC_HWFEAT_AUXSNAPNUM GENMASK(30, 28)
> #define XGMAC_HWFEAT_PPSOUTNUM GENMASK(26, 24)
> #define XGMAC_HWFEAT_TXCHCNT GENMASK(21, 18)
> #define XGMAC_HWFEAT_RXCHCNT GENMASK(15, 12)
> #define XGMAC_HWFEAT_TXQCNT GENMASK(9, 6)
> #define XGMAC_HWFEAT_RXQCNT GENMASK(3, 0)
> #define XGMAC_HW_FEATURE3 0x00000128
> +#define XGMAC_HWFEAT_TBSCH GENMASK(31, 28)
> #define XGMAC_HWFEAT_TBSSEL BIT(27)
> #define XGMAC_HWFEAT_FPESEL BIT(26)
> +#define XGMAC_HWFEAT_SGFSEL BIT(25)
> #define XGMAC_HWFEAT_ESTWID GENMASK(24, 23)
> #define XGMAC_HWFEAT_ESTDEP GENMASK(22, 20)
> #define XGMAC_HWFEAT_ESTSEL BIT(19)
> +#define XGMAC_HWFEAT_TTSFD GENMASK(18, 16)
> #define XGMAC_HWFEAT_ASP GENMASK(15, 14)
> #define XGMAC_HWFEAT_DVLAN BIT(13)
> #define XGMAC_HWFEAT_FRPES GENMASK(12, 11)
> #define XGMAC_HWFEAT_FRPPB GENMASK(10, 9)
> +#define XGMAC_HWFEAT_POUOST BIT(8)
> +#define XGMAC_HWFEAT_FRPPIPE GENMASK(7, 5)
> +#define XGMAC_HWFEAT_CBTISEL BIT(4)
> #define XGMAC_HWFEAT_FRPSEL BIT(3)
> +#define XGMAC_HWFEAT_NRVF GENMASK(2, 0)
> +#define XGMAC_HW_FEATURE4 0x0000012c
> +#define XGMAC_HWFEAT_EASP BIT(4)
> +#define XGMAC_HWFEAT_PCSEL GENMASK(1, 0)
> #define XGMAC_MAC_DPP_FSM_INT_STATUS 0x00000150
> #define XGMAC_MAC_FSM_CONTROL 0x00000158
> #define XGMAC_PRTYEN BIT(1)
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c
> index 38782662ff98..34e1b0c3f346 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c
> @@ -861,8 +861,10 @@ dwxgmac3_safety_feat_config(void __iomem *ioaddr, unsigned int asp,
> value |= XGMAC_TCEIE; /* TSO Memory Correctable Error */
> writel(value, ioaddr + XGMAC_DMA_ECC_INT_ENABLE);
>
> - /* Only ECC Protection for External Memory feature is selected */
> - if (asp <= 0x1)
> + /* 0x2: Without ECC or Parity Ports on External Application Interface
> + * 0x4: Only ECC Protection for External Memory feature is selected
> + */
> + if (asp == 0x2 || asp == 0x4)
> return 0;
This changes the dwxgmac3_safety_feat_config() method semantic. Please
detach in a separate patch and thoroughly explain.
>
> /* 4. Enable Parity and Timeout for FSM */
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
> index 3aacf791efeb..fa69d64a8694 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
> @@ -393,6 +393,9 @@ static int dwxgmac2_get_hw_feature(void __iomem *ioaddr,
>
> /* MAC HW feature 0 */
> hw_cap = readl(ioaddr + XGMAC_HW_FEATURE0);
> + dma_cap->edma = (hw_cap & XGMAC_HWFEAT_EDMA) >> 31;
> + dma_cap->ediffc = (hw_cap & XGMAC_HWFEAT_EDIFFC) >> 30;
> + dma_cap->vxn = (hw_cap & XGMAC_HWFEAT_VXN) >> 29;
> dma_cap->vlins = (hw_cap & XGMAC_HWFEAT_SAVLANINS) >> 27;
> dma_cap->tssrc = (hw_cap & XGMAC_HWFEAT_TSSTSSEL) >> 25;
> dma_cap->multi_addr = (hw_cap & XGMAC_HWFEAT_ADDMACADRSEL) >> 18;
> @@ -425,9 +428,12 @@ static int dwxgmac2_get_hw_feature(void __iomem *ioaddr,
> dma_cap->l3l4fnum = 32;
>
> dma_cap->hash_tb_sz = (hw_cap & XGMAC_HWFEAT_HASHTBLSZ) >> 24;
> + dma_cap->numtc = ((hw_cap & XGMAC_HWFEAT_NUMTC) >> 21) + 1;
> dma_cap->rssen = (hw_cap & XGMAC_HWFEAT_RSSEN) >> 20;
> + dma_cap->dbgmem = (hw_cap & XGMAC_HWFEAT_DBGMEMA) >> 19;
> dma_cap->tsoen = (hw_cap & XGMAC_HWFEAT_TSOEN) >> 18;
> dma_cap->sphen = (hw_cap & XGMAC_HWFEAT_SPHEN) >> 17;
> + dma_cap->dcben = (hw_cap & XGMAC_HWFEAT_DCBEN) >> 16;
>
> dma_cap->addr64 = (hw_cap & XGMAC_HWFEAT_ADDR64) >> 14;
> switch (dma_cap->addr64) {
> @@ -445,13 +451,18 @@ static int dwxgmac2_get_hw_feature(void __iomem *ioaddr,
> break;
> }
>
> + dma_cap->advthword = (hw_cap & XGMAC_HWFEAT_ADVTHWORD) >> 13;
> + dma_cap->ptoen = (hw_cap & XGMAC_HWFEAT_PTOEN) >> 12;
> + dma_cap->osten = (hw_cap & XGMAC_HWFEAT_OSTEN) >> 11;
> dma_cap->tx_fifo_size =
> 128 << ((hw_cap & XGMAC_HWFEAT_TXFIFOSIZE) >> 6);
> + dma_cap->pfcen = (hw_cap & XGMAC_HWFEAT_PFCEN) >> 5;
> dma_cap->rx_fifo_size =
> 128 << ((hw_cap & XGMAC_HWFEAT_RXFIFOSIZE) >> 0);
>
> /* MAC HW feature 2 */
> hw_cap = readl(ioaddr + XGMAC_HW_FEATURE2);
> + dma_cap->aux_snapshot_n = (hw_cap & XGMAC_HWFEAT_AUXSNAPNUM) >> 28;
> dma_cap->pps_out_num = (hw_cap & XGMAC_HWFEAT_PPSOUTNUM) >> 24;
> dma_cap->number_tx_channel =
> ((hw_cap & XGMAC_HWFEAT_TXCHCNT) >> 18) + 1;
> @@ -464,16 +475,28 @@ static int dwxgmac2_get_hw_feature(void __iomem *ioaddr,
>
> /* MAC HW feature 3 */
> hw_cap = readl(ioaddr + XGMAC_HW_FEATURE3);
> + dma_cap->tbs_ch_num = ((hw_cap & XGMAC_HWFEAT_TBSCH) >> 28) + 1;
> dma_cap->tbssel = (hw_cap & XGMAC_HWFEAT_TBSSEL) >> 27;
> dma_cap->fpesel = (hw_cap & XGMAC_HWFEAT_FPESEL) >> 26;
> + dma_cap->sgfsel = (hw_cap & XGMAC_HWFEAT_SGFSEL) >> 25;
> dma_cap->estwid = (hw_cap & XGMAC_HWFEAT_ESTWID) >> 23;
> dma_cap->estdep = (hw_cap & XGMAC_HWFEAT_ESTDEP) >> 20;
> dma_cap->estsel = (hw_cap & XGMAC_HWFEAT_ESTSEL) >> 19;
> + dma_cap->ttsfd = (hw_cap & XGMAC_HWFEAT_TTSFD) >> 16;
> dma_cap->asp = (hw_cap & XGMAC_HWFEAT_ASP) >> 14;
> dma_cap->dvlan = (hw_cap & XGMAC_HWFEAT_DVLAN) >> 13;
> dma_cap->frpes = (hw_cap & XGMAC_HWFEAT_FRPES) >> 11;
> dma_cap->frpbs = (hw_cap & XGMAC_HWFEAT_FRPPB) >> 9;
> + dma_cap->pou_ost_en = (hw_cap & XGMAC_HWFEAT_POUOST) >> 8;
> + dma_cap->frppipe_num = ((hw_cap & XGMAC_HWFEAT_FRPPIPE) >> 5) + 1;
> + dma_cap->cbtisel = (hw_cap & XGMAC_HWFEAT_CBTISEL) >> 4;
> dma_cap->frpsel = (hw_cap & XGMAC_HWFEAT_FRPSEL) >> 3;
> + dma_cap->nrvf_num = (hw_cap & XGMAC_HWFEAT_NRVF) >> 0;
> +
> + /* MAC HW feature 4 */
> + hw_cap = readl(ioaddr + XGMAC_HW_FEATURE4);
> + dma_cap->asp |= (hw_cap & XGMAC_HWFEAT_EASP) >> 2;
So you intermix ASP and EASP flags in the dma_features->asp field.
This makes the field value being deviated from what DW Eth QoS/XGMAC
defines. It doesn't look correct. Am I missing something?
> + dma_cap->pcsel = (hw_cap & XGMAC_HWFEAT_PCSEL) >> 0;
>
> return 0;
> }
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> index 733b5e900817..7a9bbcf03ea5 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> @@ -6243,6 +6243,16 @@ static int stmmac_dma_cap_show(struct seq_file *seq, void *v)
> "External",
> "Both",
> };
> + static const char * const dwxgmac_safety_feature_desc[] = {
> + "No",
> + "All Safety Features with ECC and Parity",
> + "All Safety Features without ECC or Parity",
> + "All Safety Features with Parity Only",
> + "ECC Only",
Hm, Looking at the DW Eth QoS v5.10a HW manual the description is the
opposite:
0x0 (NONE): No Safety features selected
0x1 (ECC_ONLY): Only "ECC protection for external
memory" feature is selected
0x2 (AS_NPPE): All the Automotive Safety features are
selected without the "Parity Port Enable for external inter-
face" feature
0x3 (AS_PPE): All the Automotive Safety features are
selected with the "Parity Port Enable for external interface"
feature
Something isn't right. I doubt DW XGMAC v3.x has a different Safety
feature implementation. Please double check the description text.
-Serge(y)
> + "UNDEFINED",
> + "UNDEFINED",
> + "UNDEFINED",
> + };
> struct net_device *dev = seq->private;
> struct stmmac_priv *priv = netdev_priv(dev);
>
> @@ -6261,15 +6271,16 @@ static int stmmac_dma_cap_show(struct seq_file *seq, void *v)
> (priv->dma_cap.mbps_1000) ? "Y" : "N");
> seq_printf(seq, "\tHalf duplex: %s\n",
> (priv->dma_cap.half_duplex) ? "Y" : "N");
> - seq_printf(seq, "\tHash Filter: %s\n",
> - (priv->dma_cap.hash_filter) ? "Y" : "N");
> - if (priv->plat->has_xgmac)
> + if (priv->plat->has_xgmac) {
> seq_printf(seq,
> "\tNumber of Additional MAC address registers: %d\n",
> priv->dma_cap.multi_addr);
> - else
> + } else {
> + seq_printf(seq, "\tHash Filter: %s\n",
> + (priv->dma_cap.hash_filter) ? "Y" : "N");
> seq_printf(seq, "\tMultiple MAC address registers: %s\n",
> (priv->dma_cap.multi_addr) ? "Y" : "N");
> + }
> seq_printf(seq, "\tPCS (TBI/SGMII/RTBI PHY interfaces): %s\n",
> (priv->dma_cap.pcs) ? "Y" : "N");
> seq_printf(seq, "\tSMA (MDIO) Interface: %s\n",
> @@ -6316,12 +6327,13 @@ static int stmmac_dma_cap_show(struct seq_file *seq, void *v)
> (priv->dma_cap.enh_desc) ? "Y" : "N");
> seq_printf(seq, "\tTX Fifo Size: %d\n", priv->dma_cap.tx_fifo_size);
> seq_printf(seq, "\tRX Fifo Size: %d\n", priv->dma_cap.rx_fifo_size);
> - seq_printf(seq, "\tHash Table Size: %d\n", priv->dma_cap.hash_tb_sz);
> + seq_printf(seq, "\tHash Table Size: %lu\n", priv->dma_cap.hash_tb_sz ?
> + (BIT(priv->dma_cap.hash_tb_sz) << 5) : 0);
> seq_printf(seq, "\tTSO: %s\n", priv->dma_cap.tsoen ? "Y" : "N");
> seq_printf(seq, "\tNumber of PPS Outputs: %d\n",
> priv->dma_cap.pps_out_num);
> seq_printf(seq, "\tSafety Features: %s\n",
> - priv->dma_cap.asp ? "Y" : "N");
> + dwxgmac_safety_feature_desc[priv->dma_cap.asp]);
> seq_printf(seq, "\tFlexible RX Parser: %s\n",
> priv->dma_cap.frpsel ? "Y" : "N");
> seq_printf(seq, "\tEnhanced Addressing: %d\n",
> @@ -6346,6 +6358,53 @@ static int stmmac_dma_cap_show(struct seq_file *seq, void *v)
> priv->dma_cap.fpesel ? "Y" : "N");
> seq_printf(seq, "\tTime-Based Scheduling (TBS): %s\n",
> priv->dma_cap.tbssel ? "Y" : "N");
> + seq_printf(seq, "\tNumber of DMA Channels Enabled for TBS: %d\n",
> + priv->dma_cap.tbs_ch_num);
> + seq_printf(seq, "\tPer-Stream Filtering: %s\n",
> + priv->dma_cap.sgfsel ? "Y" : "N");
> + seq_printf(seq, "\tTX Timestamp FIFO Depth: %lu\n",
> + BIT(priv->dma_cap.ttsfd) >> 1);
> + seq_printf(seq, "\tNumber of Traffic Classes: %d\n",
> + priv->dma_cap.numtc);
> + seq_printf(seq, "\tDCB Feature: %s\n",
> + priv->dma_cap.dcben ? "Y" : "N");
> + seq_printf(seq, "\tIEEE 1588 High Word Register: %s\n",
> + priv->dma_cap.advthword ? "Y" : "N");
> + seq_printf(seq, "\tPTP Offload: %s\n",
> + priv->dma_cap.ptoen ? "Y" : "N");
> + seq_printf(seq, "\tOne-Step Timestamping: %s\n",
> + priv->dma_cap.osten ? "Y" : "N");
> + seq_printf(seq, "\tPriority-Based Flow Control: %s\n",
> + priv->dma_cap.pfcen ? "Y" : "N");
> + seq_printf(seq, "\tNumber of Flexible RX Parser Instructions: %lu\n",
> + BIT(priv->dma_cap.frpes) << 6);
> + seq_printf(seq, "\tNumber of Flexible RX Parser Parsable Bytes: %lu\n",
> + BIT(priv->dma_cap.frpbs) << 6);
> + seq_printf(seq, "\tParallel Instruction Processor Engines: %d\n",
> + priv->dma_cap.frppipe_num);
> + seq_printf(seq, "\tNumber of Extended VLAN Tag Filters: %lu\n",
> + priv->dma_cap.nrvf_num ?
> + (BIT(priv->dma_cap.nrvf_num) << 1) : 0);
> + seq_printf(seq, "\tWidth of the Time Interval Field in GCL: %d\n",
> + priv->dma_cap.estwid ? 4 * priv->dma_cap.estwid + 12 : 0);
> + seq_printf(seq, "\tDepth of GCL: %lu\n",
> + priv->dma_cap.estdep ? (BIT(priv->dma_cap.estdep) << 5) : 0);
> + seq_printf(seq, "\tQueue/Channel-Based VLAN Tag Insertion on TX: %s\n",
> + priv->dma_cap.cbtisel ? "Y" : "N");
> + seq_printf(seq, "\tNumber of Auxiliary Snapshot Inputs: %d\n",
> + priv->dma_cap.aux_snapshot_n);
> + seq_printf(seq, "\tOne-Step Timestamping for PTP over UDP/IP: %s\n",
> + priv->dma_cap.pou_ost_en ? "Y" : "N");
> + seq_printf(seq, "\tEnhanced DMA: %s\n",
> + priv->dma_cap.edma ? "Y" : "N");
> + seq_printf(seq, "\tDifferent Descriptor Cache: %s\n",
> + priv->dma_cap.ediffc ? "Y" : "N");
> + seq_printf(seq, "\tVxLAN/NVGRE: %s\n",
> + priv->dma_cap.vxn ? "Y" : "N");
> + seq_printf(seq, "\tDebug Memory Interface: %s\n",
> + priv->dma_cap.dbgmem ? "Y" : "N");
> + seq_printf(seq, "\tNumber of Policing Counters: %lu\n",
> + priv->dma_cap.pcsel ? BIT(priv->dma_cap.pcsel + 3) : 0);
> return 0;
> }
> DEFINE_SHOW_ATTRIBUTE(stmmac_dma_cap);
> --
> 2.34.1
>
>