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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) 2015 Cavium, Inc.4 */5 6#include <linux/acpi.h>7#include <linux/module.h>8#include <linux/interrupt.h>9#include <linux/pci.h>10#include <linux/netdevice.h>11#include <linux/etherdevice.h>12#include <linux/phy.h>13#include <linux/of.h>14#include <linux/of_mdio.h>15#include <linux/of_net.h>16 17#include "nic_reg.h"18#include "nic.h"19#include "thunder_bgx.h"20 21#define DRV_NAME	"thunder_bgx"22#define DRV_VERSION	"1.0"23 24/* RX_DMAC_CTL configuration */25enum MCAST_MODE {26		MCAST_MODE_REJECT = 0x0,27		MCAST_MODE_ACCEPT = 0x1,28		MCAST_MODE_CAM_FILTER = 0x2,29		RSVD = 0x330};31 32#define BCAST_ACCEPT      BIT(0)33#define CAM_ACCEPT        BIT(3)34#define MCAST_MODE_MASK   0x335#define BGX_MCAST_MODE(x) (x << 1)36 37struct dmac_map {38	u64                     vf_map;39	u64                     dmac;40};41 42struct lmac {43	struct bgx		*bgx;44	/* actual number of DMACs configured */45	u8			dmacs_cfg;46	/* overal number of possible DMACs could be configured per LMAC */47	u8                      dmacs_count;48	struct dmac_map         *dmacs; /* DMAC:VFs tracking filter array */49	u8			mac[ETH_ALEN];50	u8                      lmac_type;51	u8                      lane_to_sds;52	bool                    use_training;53	bool                    autoneg;54	bool			link_up;55	int			lmacid; /* ID within BGX */56	int			lmacid_bd; /* ID on board */57	struct net_device       *netdev;58	struct phy_device       *phydev;59	unsigned int            last_duplex;60	unsigned int            last_link;61	unsigned int            last_speed;62	bool			is_sgmii;63	struct delayed_work	dwork;64	struct workqueue_struct *check_link;65};66 67struct bgx {68	u8			bgx_id;69	struct	lmac		lmac[MAX_LMAC_PER_BGX];70	u8			lmac_count;71	u8			max_lmac;72	u8                      acpi_lmac_idx;73	void __iomem		*reg_base;74	struct pci_dev		*pdev;75	bool                    is_dlm;76	bool                    is_rgx;77};78 79static struct bgx *bgx_vnic[MAX_BGX_THUNDER];80static int lmac_count; /* Total no of LMACs in system */81 82static int bgx_xaui_check_link(struct lmac *lmac);83 84/* Supported devices */85static const struct pci_device_id bgx_id_table[] = {86	{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVICE_ID_THUNDER_BGX) },87	{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVICE_ID_THUNDER_RGX) },88	{ 0, }  /* end of table */89};90 91MODULE_AUTHOR("Cavium Inc");92MODULE_DESCRIPTION("Cavium Thunder BGX/MAC Driver");93MODULE_LICENSE("GPL v2");94MODULE_VERSION(DRV_VERSION);95MODULE_DEVICE_TABLE(pci, bgx_id_table);96 97/* The Cavium ThunderX network controller can *only* be found in SoCs98 * containing the ThunderX ARM64 CPU implementation.  All accesses to the device99 * registers on this platform are implicitly strongly ordered with respect100 * to memory accesses. So writeq_relaxed() and readq_relaxed() are safe to use101 * with no memory barriers in this driver.  The readq()/writeq() functions add102 * explicit ordering operation which in this case are redundant, and only103 * add overhead.104 */105 106/* Register read/write APIs */107static u64 bgx_reg_read(struct bgx *bgx, u8 lmac, u64 offset)108{109	void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset;110 111	return readq_relaxed(addr);112}113 114static void bgx_reg_write(struct bgx *bgx, u8 lmac, u64 offset, u64 val)115{116	void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset;117 118	writeq_relaxed(val, addr);119}120 121static void bgx_reg_modify(struct bgx *bgx, u8 lmac, u64 offset, u64 val)122{123	void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset;124 125	writeq_relaxed(val | readq_relaxed(addr), addr);126}127 128static int bgx_poll_reg(struct bgx *bgx, u8 lmac, u64 reg, u64 mask, bool zero)129{130	int timeout = 100;131	u64 reg_val;132 133	while (timeout) {134		reg_val = bgx_reg_read(bgx, lmac, reg);135		if (zero && !(reg_val & mask))136			return 0;137		if (!zero && (reg_val & mask))138			return 0;139		usleep_range(1000, 2000);140		timeout--;141	}142	return 1;143}144 145static int max_bgx_per_node;146static void set_max_bgx_per_node(struct pci_dev *pdev)147{148	u16 sdevid;149 150	if (max_bgx_per_node)151		return;152 153	pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &sdevid);154	switch (sdevid) {155	case PCI_SUBSYS_DEVID_81XX_BGX:156	case PCI_SUBSYS_DEVID_81XX_RGX:157		max_bgx_per_node = MAX_BGX_PER_CN81XX;158		break;159	case PCI_SUBSYS_DEVID_83XX_BGX:160		max_bgx_per_node = MAX_BGX_PER_CN83XX;161		break;162	case PCI_SUBSYS_DEVID_88XX_BGX:163	default:164		max_bgx_per_node = MAX_BGX_PER_CN88XX;165		break;166	}167}168 169static struct bgx *get_bgx(int node, int bgx_idx)170{171	int idx = (node * max_bgx_per_node) + bgx_idx;172 173	return bgx_vnic[idx];174}175 176/* Return number of BGX present in HW */177unsigned bgx_get_map(int node)178{179	int i;180	unsigned map = 0;181 182	for (i = 0; i < max_bgx_per_node; i++) {183		if (bgx_vnic[(node * max_bgx_per_node) + i])184			map |= (1 << i);185	}186 187	return map;188}189EXPORT_SYMBOL(bgx_get_map);190 191/* Return number of LMAC configured for this BGX */192int bgx_get_lmac_count(int node, int bgx_idx)193{194	struct bgx *bgx;195 196	bgx = get_bgx(node, bgx_idx);197	if (bgx)198		return bgx->lmac_count;199 200	return 0;201}202EXPORT_SYMBOL(bgx_get_lmac_count);203 204/* Returns the current link status of LMAC */205void bgx_get_lmac_link_state(int node, int bgx_idx, int lmacid, void *status)206{207	struct bgx_link_status *link = (struct bgx_link_status *)status;208	struct bgx *bgx;209	struct lmac *lmac;210 211	bgx = get_bgx(node, bgx_idx);212	if (!bgx)213		return;214 215	lmac = &bgx->lmac[lmacid];216	link->mac_type = lmac->lmac_type;217	link->link_up = lmac->link_up;218	link->duplex = lmac->last_duplex;219	link->speed = lmac->last_speed;220}221EXPORT_SYMBOL(bgx_get_lmac_link_state);222 223const u8 *bgx_get_lmac_mac(int node, int bgx_idx, int lmacid)224{225	struct bgx *bgx = get_bgx(node, bgx_idx);226 227	if (bgx)228		return bgx->lmac[lmacid].mac;229 230	return NULL;231}232EXPORT_SYMBOL(bgx_get_lmac_mac);233 234void bgx_set_lmac_mac(int node, int bgx_idx, int lmacid, const u8 *mac)235{236	struct bgx *bgx = get_bgx(node, bgx_idx);237 238	if (!bgx)239		return;240 241	ether_addr_copy(bgx->lmac[lmacid].mac, mac);242}243EXPORT_SYMBOL(bgx_set_lmac_mac);244 245static void bgx_flush_dmac_cam_filter(struct bgx *bgx, int lmacid)246{247	struct lmac *lmac = NULL;248	u8  idx = 0;249 250	lmac = &bgx->lmac[lmacid];251	/* reset CAM filters */252	for (idx = 0; idx < lmac->dmacs_count; idx++)253		bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM +254			      ((lmacid * lmac->dmacs_count) + idx) *255			      sizeof(u64), 0);256}257 258static void bgx_lmac_remove_filters(struct lmac *lmac, u8 vf_id)259{260	int i = 0;261 262	if (!lmac)263		return;264 265	/* We've got reset filters request from some of attached VF, while the266	 * others might want to keep their configuration. So in this case lets267	 * iterate over all of configured filters and decrease number of268	 * referencies. if some addresses get zero refs remove them from list269	 */270	for (i = lmac->dmacs_cfg - 1; i >= 0; i--) {271		lmac->dmacs[i].vf_map &= ~BIT_ULL(vf_id);272		if (!lmac->dmacs[i].vf_map) {273			lmac->dmacs_cfg--;274			lmac->dmacs[i].dmac = 0;275			lmac->dmacs[i].vf_map = 0;276		}277	}278}279 280static int bgx_lmac_save_filter(struct lmac *lmac, u64 dmac, u8 vf_id)281{282	u8 i = 0;283 284	if (!lmac)285		return -1;286 287	/* At the same time we could have several VFs 'attached' to some288	 * particular LMAC, and each VF is represented as network interface289	 * for kernel. So from user perspective it should be possible to290	 * manipulate with its' (VF) receive modes. However from PF291	 * driver perspective we need to keep track of filter configurations292	 * for different VFs to prevent filter values dupes293	 */294	for (i = 0; i < lmac->dmacs_cfg; i++) {295		if (lmac->dmacs[i].dmac == dmac) {296			lmac->dmacs[i].vf_map |= BIT_ULL(vf_id);297			return -1;298		}299	}300 301	if (!(lmac->dmacs_cfg < lmac->dmacs_count))302		return -1;303 304	/* keep it for further tracking */305	lmac->dmacs[lmac->dmacs_cfg].dmac = dmac;306	lmac->dmacs[lmac->dmacs_cfg].vf_map = BIT_ULL(vf_id);307	lmac->dmacs_cfg++;308	return 0;309}310 311static int bgx_set_dmac_cam_filter_mac(struct bgx *bgx, int lmacid,312				       u64 cam_dmac, u8 idx)313{314	struct lmac *lmac = NULL;315	u64 cfg = 0;316 317	/* skip zero addresses as meaningless */318	if (!cam_dmac || !bgx)319		return -1;320 321	lmac = &bgx->lmac[lmacid];322 323	/* configure DCAM filtering for designated LMAC */324	cfg = RX_DMACX_CAM_LMACID(lmacid & LMAC_ID_MASK) |325		RX_DMACX_CAM_EN | cam_dmac;326	bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM +327		      ((lmacid * lmac->dmacs_count) + idx) * sizeof(u64), cfg);328	return 0;329}330 331void bgx_set_dmac_cam_filter(int node, int bgx_idx, int lmacid,332			     u64 cam_dmac, u8 vf_id)333{334	struct bgx *bgx = get_bgx(node, bgx_idx);335	struct lmac *lmac = NULL;336 337	if (!bgx)338		return;339 340	lmac = &bgx->lmac[lmacid];341 342	if (!cam_dmac)343		cam_dmac = ether_addr_to_u64(lmac->mac);344 345	/* since we might have several VFs attached to particular LMAC346	 * and kernel could call mcast config for each of them with the347	 * same MAC, check if requested MAC is already in filtering list and348	 * updare/prepare list of MACs to be applied later to HW filters349	 */350	bgx_lmac_save_filter(lmac, cam_dmac, vf_id);351}352EXPORT_SYMBOL(bgx_set_dmac_cam_filter);353 354void bgx_set_xcast_mode(int node, int bgx_idx, int lmacid, u8 mode)355{356	struct bgx *bgx = get_bgx(node, bgx_idx);357	struct lmac *lmac = NULL;358	u64 cfg = 0;359	u8 i = 0;360 361	if (!bgx)362		return;363 364	lmac = &bgx->lmac[lmacid];365 366	cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_RX_DMAC_CTL);367	if (mode & BGX_XCAST_BCAST_ACCEPT)368		cfg |= BCAST_ACCEPT;369	else370		cfg &= ~BCAST_ACCEPT;371 372	/* disable all MCASTs and DMAC filtering */373	cfg &= ~(CAM_ACCEPT | BGX_MCAST_MODE(MCAST_MODE_MASK));374 375	/* check requested bits and set filtergin mode appropriately */376	if (mode & (BGX_XCAST_MCAST_ACCEPT)) {377		cfg |= (BGX_MCAST_MODE(MCAST_MODE_ACCEPT));378	} else if (mode & BGX_XCAST_MCAST_FILTER) {379		cfg |= (BGX_MCAST_MODE(MCAST_MODE_CAM_FILTER) | CAM_ACCEPT);380		for (i = 0; i < lmac->dmacs_cfg; i++)381			bgx_set_dmac_cam_filter_mac(bgx, lmacid,382						    lmac->dmacs[i].dmac, i);383	}384	bgx_reg_write(bgx, lmacid, BGX_CMRX_RX_DMAC_CTL, cfg);385}386EXPORT_SYMBOL(bgx_set_xcast_mode);387 388void bgx_reset_xcast_mode(int node, int bgx_idx, int lmacid, u8 vf_id)389{390	struct bgx *bgx = get_bgx(node, bgx_idx);391 392	if (!bgx)393		return;394 395	bgx_lmac_remove_filters(&bgx->lmac[lmacid], vf_id);396	bgx_flush_dmac_cam_filter(bgx, lmacid);397	bgx_set_xcast_mode(node, bgx_idx, lmacid,398			   (BGX_XCAST_BCAST_ACCEPT | BGX_XCAST_MCAST_ACCEPT));399}400EXPORT_SYMBOL(bgx_reset_xcast_mode);401 402void bgx_lmac_rx_tx_enable(int node, int bgx_idx, int lmacid, bool enable)403{404	struct bgx *bgx = get_bgx(node, bgx_idx);405	struct lmac *lmac;406	u64 cfg;407 408	if (!bgx)409		return;410	lmac = &bgx->lmac[lmacid];411 412	cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);413	if (enable) {414		cfg |= CMR_PKT_RX_EN | CMR_PKT_TX_EN;415 416		/* enable TX FIFO Underflow interrupt */417		bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_TXX_INT_ENA_W1S,418			       GMI_TXX_INT_UNDFLW);419	} else {420		cfg &= ~(CMR_PKT_RX_EN | CMR_PKT_TX_EN);421 422		/* Disable TX FIFO Underflow interrupt */423		bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_TXX_INT_ENA_W1C,424			       GMI_TXX_INT_UNDFLW);425	}426	bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);427 428	if (bgx->is_rgx)429		xcv_setup_link(enable ? lmac->link_up : 0, lmac->last_speed);430}431EXPORT_SYMBOL(bgx_lmac_rx_tx_enable);432 433/* Enables or disables timestamp insertion by BGX for Rx packets */434void bgx_config_timestamping(int node, int bgx_idx, int lmacid, bool enable)435{436	struct bgx *bgx = get_bgx(node, bgx_idx);437	struct lmac *lmac;438	u64 csr_offset, cfg;439 440	if (!bgx)441		return;442 443	lmac = &bgx->lmac[lmacid];444 445	if (lmac->lmac_type == BGX_MODE_SGMII ||446	    lmac->lmac_type == BGX_MODE_QSGMII ||447	    lmac->lmac_type == BGX_MODE_RGMII)448		csr_offset = BGX_GMP_GMI_RXX_FRM_CTL;449	else450		csr_offset = BGX_SMUX_RX_FRM_CTL;451 452	cfg = bgx_reg_read(bgx, lmacid, csr_offset);453 454	if (enable)455		cfg |= BGX_PKT_RX_PTP_EN;456	else457		cfg &= ~BGX_PKT_RX_PTP_EN;458	bgx_reg_write(bgx, lmacid, csr_offset, cfg);459}460EXPORT_SYMBOL(bgx_config_timestamping);461 462void bgx_lmac_get_pfc(int node, int bgx_idx, int lmacid, void *pause)463{464	struct pfc *pfc = (struct pfc *)pause;465	struct bgx *bgx = get_bgx(node, bgx_idx);466	struct lmac *lmac;467	u64 cfg;468 469	if (!bgx)470		return;471	lmac = &bgx->lmac[lmacid];472	if (lmac->is_sgmii)473		return;474 475	cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_CBFC_CTL);476	pfc->fc_rx = cfg & RX_EN;477	pfc->fc_tx = cfg & TX_EN;478	pfc->autoneg = 0;479}480EXPORT_SYMBOL(bgx_lmac_get_pfc);481 482void bgx_lmac_set_pfc(int node, int bgx_idx, int lmacid, void *pause)483{484	struct pfc *pfc = (struct pfc *)pause;485	struct bgx *bgx = get_bgx(node, bgx_idx);486	struct lmac *lmac;487	u64 cfg;488 489	if (!bgx)490		return;491	lmac = &bgx->lmac[lmacid];492	if (lmac->is_sgmii)493		return;494 495	cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_CBFC_CTL);496	cfg &= ~(RX_EN | TX_EN);497	cfg |= (pfc->fc_rx ? RX_EN : 0x00);498	cfg |= (pfc->fc_tx ? TX_EN : 0x00);499	bgx_reg_write(bgx, lmacid, BGX_SMUX_CBFC_CTL, cfg);500}501EXPORT_SYMBOL(bgx_lmac_set_pfc);502 503static void bgx_sgmii_change_link_state(struct lmac *lmac)504{505	struct bgx *bgx = lmac->bgx;506	u64 cmr_cfg;507	u64 port_cfg = 0;508	u64 misc_ctl = 0;509	bool tx_en, rx_en;510 511	cmr_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_CMRX_CFG);512	tx_en = cmr_cfg & CMR_PKT_TX_EN;513	rx_en = cmr_cfg & CMR_PKT_RX_EN;514	cmr_cfg &= ~(CMR_PKT_RX_EN | CMR_PKT_TX_EN);515	bgx_reg_write(bgx, lmac->lmacid, BGX_CMRX_CFG, cmr_cfg);516 517	/* Wait for BGX RX to be idle */518	if (bgx_poll_reg(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG,519			 GMI_PORT_CFG_RX_IDLE, false)) {520		dev_err(&bgx->pdev->dev, "BGX%d LMAC%d GMI RX not idle\n",521			bgx->bgx_id, lmac->lmacid);522		return;523	}524 525	/* Wait for BGX TX to be idle */526	if (bgx_poll_reg(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG,527			 GMI_PORT_CFG_TX_IDLE, false)) {528		dev_err(&bgx->pdev->dev, "BGX%d LMAC%d GMI TX not idle\n",529			bgx->bgx_id, lmac->lmacid);530		return;531	}532 533	port_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG);534	misc_ctl = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_PCS_MISCX_CTL);535 536	if (lmac->link_up) {537		misc_ctl &= ~PCS_MISC_CTL_GMX_ENO;538		port_cfg &= ~GMI_PORT_CFG_DUPLEX;539		port_cfg |=  (lmac->last_duplex << 2);540	} else {541		misc_ctl |= PCS_MISC_CTL_GMX_ENO;542	}543 544	switch (lmac->last_speed) {545	case 10:546		port_cfg &= ~GMI_PORT_CFG_SPEED; /* speed 0 */547		port_cfg |= GMI_PORT_CFG_SPEED_MSB;  /* speed_msb 1 */548		port_cfg &= ~GMI_PORT_CFG_SLOT_TIME; /* slottime 0 */549		misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK;550		misc_ctl |= 50; /* samp_pt */551		bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 64);552		bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_BURST, 0);553		break;554	case 100:555		port_cfg &= ~GMI_PORT_CFG_SPEED; /* speed 0 */556		port_cfg &= ~GMI_PORT_CFG_SPEED_MSB; /* speed_msb 0 */557		port_cfg &= ~GMI_PORT_CFG_SLOT_TIME; /* slottime 0 */558		misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK;559		misc_ctl |= 5; /* samp_pt */560		bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 64);561		bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_BURST, 0);562		break;563	case 1000:564		port_cfg |= GMI_PORT_CFG_SPEED; /* speed 1 */565		port_cfg &= ~GMI_PORT_CFG_SPEED_MSB; /* speed_msb 0 */566		port_cfg |= GMI_PORT_CFG_SLOT_TIME; /* slottime 1 */567		misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK;568		misc_ctl |= 1; /* samp_pt */569		bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 512);570		if (lmac->last_duplex)571			bgx_reg_write(bgx, lmac->lmacid,572				      BGX_GMP_GMI_TXX_BURST, 0);573		else574			bgx_reg_write(bgx, lmac->lmacid,575				      BGX_GMP_GMI_TXX_BURST, 8192);576		break;577	default:578		break;579	}580	bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_PCS_MISCX_CTL, misc_ctl);581	bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG, port_cfg);582 583	/* Restore CMR config settings */584	cmr_cfg |= (rx_en ? CMR_PKT_RX_EN : 0) | (tx_en ? CMR_PKT_TX_EN : 0);585	bgx_reg_write(bgx, lmac->lmacid, BGX_CMRX_CFG, cmr_cfg);586 587	if (bgx->is_rgx && (cmr_cfg & (CMR_PKT_RX_EN | CMR_PKT_TX_EN)))588		xcv_setup_link(lmac->link_up, lmac->last_speed);589}590 591static void bgx_lmac_handler(struct net_device *netdev)592{593	struct phy_device *phydev;594	struct lmac *lmac, **priv;595	int link_changed = 0;596 597	priv = netdev_priv(netdev);598	lmac = *priv;599	phydev = lmac->phydev;600 601	if (!phydev->link && lmac->last_link)602		link_changed = -1;603 604	if (phydev->link &&605	    (lmac->last_duplex != phydev->duplex ||606	     lmac->last_link != phydev->link ||607	     lmac->last_speed != phydev->speed)) {608			link_changed = 1;609	}610 611	lmac->last_link = phydev->link;612	lmac->last_speed = phydev->speed;613	lmac->last_duplex = phydev->duplex;614 615	if (!link_changed)616		return;617 618	if (link_changed > 0)619		lmac->link_up = true;620	else621		lmac->link_up = false;622 623	if (lmac->is_sgmii)624		bgx_sgmii_change_link_state(lmac);625	else626		bgx_xaui_check_link(lmac);627}628 629u64 bgx_get_rx_stats(int node, int bgx_idx, int lmac, int idx)630{631	struct bgx *bgx;632 633	bgx = get_bgx(node, bgx_idx);634	if (!bgx)635		return 0;636 637	if (idx > 8)638		lmac = 0;639	return bgx_reg_read(bgx, lmac, BGX_CMRX_RX_STAT0 + (idx * 8));640}641EXPORT_SYMBOL(bgx_get_rx_stats);642 643u64 bgx_get_tx_stats(int node, int bgx_idx, int lmac, int idx)644{645	struct bgx *bgx;646 647	bgx = get_bgx(node, bgx_idx);648	if (!bgx)649		return 0;650 651	return bgx_reg_read(bgx, lmac, BGX_CMRX_TX_STAT0 + (idx * 8));652}653EXPORT_SYMBOL(bgx_get_tx_stats);654 655/* Configure BGX LMAC in internal loopback mode */656void bgx_lmac_internal_loopback(int node, int bgx_idx,657				int lmac_idx, bool enable)658{659	struct bgx *bgx;660	struct lmac *lmac;661	u64    cfg;662 663	bgx = get_bgx(node, bgx_idx);664	if (!bgx)665		return;666 667	lmac = &bgx->lmac[lmac_idx];668	if (lmac->is_sgmii) {669		cfg = bgx_reg_read(bgx, lmac_idx, BGX_GMP_PCS_MRX_CTL);670		if (enable)671			cfg |= PCS_MRX_CTL_LOOPBACK1;672		else673			cfg &= ~PCS_MRX_CTL_LOOPBACK1;674		bgx_reg_write(bgx, lmac_idx, BGX_GMP_PCS_MRX_CTL, cfg);675	} else {676		cfg = bgx_reg_read(bgx, lmac_idx, BGX_SPUX_CONTROL1);677		if (enable)678			cfg |= SPU_CTL_LOOPBACK;679		else680			cfg &= ~SPU_CTL_LOOPBACK;681		bgx_reg_write(bgx, lmac_idx, BGX_SPUX_CONTROL1, cfg);682	}683}684EXPORT_SYMBOL(bgx_lmac_internal_loopback);685 686static int bgx_lmac_sgmii_init(struct bgx *bgx, struct lmac *lmac)687{688	int lmacid = lmac->lmacid;689	u64 cfg;690 691	bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_TXX_THRESH, 0x30);692	/* max packet size */693	bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_RXX_JABBER, MAX_FRAME_SIZE);694 695	/* Disable frame alignment if using preamble */696	cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND);697	if (cfg & 1)698		bgx_reg_write(bgx, lmacid, BGX_GMP_GMI_TXX_SGMII_CTL, 0);699 700	/* Enable lmac */701	bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);702 703	/* PCS reset */704	bgx_reg_modify(bgx, lmacid, BGX_GMP_PCS_MRX_CTL, PCS_MRX_CTL_RESET);705	if (bgx_poll_reg(bgx, lmacid, BGX_GMP_PCS_MRX_CTL,706			 PCS_MRX_CTL_RESET, true)) {707		dev_err(&bgx->pdev->dev, "BGX PCS reset not completed\n");708		return -1;709	}710 711	/* power down, reset autoneg, autoneg enable */712	cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_PCS_MRX_CTL);713	cfg &= ~PCS_MRX_CTL_PWR_DN;714	cfg |= PCS_MRX_CTL_RST_AN;715	if (lmac->phydev) {716		cfg |= PCS_MRX_CTL_AN_EN;717	} else {718		/* In scenarios where PHY driver is not present or it's a719		 * non-standard PHY, FW sets AN_EN to inform Linux driver720		 * to do auto-neg and link polling or not.721		 */722		if (cfg & PCS_MRX_CTL_AN_EN)723			lmac->autoneg = true;724	}725	bgx_reg_write(bgx, lmacid, BGX_GMP_PCS_MRX_CTL, cfg);726 727	if (lmac->lmac_type == BGX_MODE_QSGMII) {728		/* Disable disparity check for QSGMII */729		cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_PCS_MISCX_CTL);730		cfg &= ~PCS_MISC_CTL_DISP_EN;731		bgx_reg_write(bgx, lmacid, BGX_GMP_PCS_MISCX_CTL, cfg);732		return 0;733	}734 735	if ((lmac->lmac_type == BGX_MODE_SGMII) && lmac->phydev) {736		if (bgx_poll_reg(bgx, lmacid, BGX_GMP_PCS_MRX_STATUS,737				 PCS_MRX_STATUS_AN_CPT, false)) {738			dev_err(&bgx->pdev->dev, "BGX AN_CPT not completed\n");739			return -1;740		}741	}742 743	return 0;744}745 746static int bgx_lmac_xaui_init(struct bgx *bgx, struct lmac *lmac)747{748	u64 cfg;749	int lmacid = lmac->lmacid;750 751	/* Reset SPU */752	bgx_reg_modify(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET);753	if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET, true)) {754		dev_err(&bgx->pdev->dev, "BGX SPU reset not completed\n");755		return -1;756	}757 758	/* Disable LMAC */759	cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);760	cfg &= ~CMR_EN;761	bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);762 763	bgx_reg_modify(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_LOW_POWER);764	/* Set interleaved running disparity for RXAUI */765	if (lmac->lmac_type == BGX_MODE_RXAUI)766		bgx_reg_modify(bgx, lmacid, BGX_SPUX_MISC_CONTROL,767			       SPU_MISC_CTL_INTLV_RDISP);768 769	/* Clear receive packet disable */770	cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_MISC_CONTROL);771	cfg &= ~SPU_MISC_CTL_RX_DIS;772	bgx_reg_write(bgx, lmacid, BGX_SPUX_MISC_CONTROL, cfg);773 774	/* clear all interrupts */775	cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_RX_INT);776	bgx_reg_write(bgx, lmacid, BGX_SMUX_RX_INT, cfg);777	cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_INT);778	bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_INT, cfg);779	cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);780	bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);781 782	if (lmac->use_training) {783		bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LP_CUP, 0x00);784		bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LD_CUP, 0x00);785		bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LD_REP, 0x00);786		/* training enable */787		bgx_reg_modify(bgx, lmacid,788			       BGX_SPUX_BR_PMD_CRTL, SPU_PMD_CRTL_TRAIN_EN);789	}790 791	/* Append FCS to each packet */792	bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_APPEND, SMU_TX_APPEND_FCS_D);793 794	/* Disable forward error correction */795	cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_FEC_CONTROL);796	cfg &= ~SPU_FEC_CTL_FEC_EN;797	bgx_reg_write(bgx, lmacid, BGX_SPUX_FEC_CONTROL, cfg);798 799	/* Disable autoneg */800	cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_AN_CONTROL);801	cfg = cfg & ~(SPU_AN_CTL_AN_EN | SPU_AN_CTL_XNP_EN);802	bgx_reg_write(bgx, lmacid, BGX_SPUX_AN_CONTROL, cfg);803 804	cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_AN_ADV);805	if (lmac->lmac_type == BGX_MODE_10G_KR)806		cfg |= (1 << 23);807	else if (lmac->lmac_type == BGX_MODE_40G_KR)808		cfg |= (1 << 24);809	else810		cfg &= ~((1 << 23) | (1 << 24));811	cfg = cfg & (~((1ULL << 25) | (1ULL << 22) | (1ULL << 12)));812	bgx_reg_write(bgx, lmacid, BGX_SPUX_AN_ADV, cfg);813 814	cfg = bgx_reg_read(bgx, 0, BGX_SPU_DBG_CONTROL);815	cfg &= ~SPU_DBG_CTL_AN_ARB_LINK_CHK_EN;816	bgx_reg_write(bgx, 0, BGX_SPU_DBG_CONTROL, cfg);817 818	/* Enable lmac */819	bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);820 821	cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_CONTROL1);822	cfg &= ~SPU_CTL_LOW_POWER;823	bgx_reg_write(bgx, lmacid, BGX_SPUX_CONTROL1, cfg);824 825	cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_CTL);826	cfg &= ~SMU_TX_CTL_UNI_EN;827	cfg |= SMU_TX_CTL_DIC_EN;828	bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_CTL, cfg);829 830	/* Enable receive and transmission of pause frames */831	bgx_reg_write(bgx, lmacid, BGX_SMUX_CBFC_CTL, ((0xffffULL << 32) |832		      BCK_EN | DRP_EN | TX_EN | RX_EN));833	/* Configure pause time and interval */834	bgx_reg_write(bgx, lmacid,835		      BGX_SMUX_TX_PAUSE_PKT_TIME, DEFAULT_PAUSE_TIME);836	cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_PAUSE_PKT_INTERVAL);837	cfg &= ~0xFFFFull;838	bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_PAUSE_PKT_INTERVAL,839		      cfg | (DEFAULT_PAUSE_TIME - 0x1000));840	bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_PAUSE_ZERO, 0x01);841 842	/* take lmac_count into account */843	bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_THRESH, (0x100 - 1));844	/* max packet size */845	bgx_reg_modify(bgx, lmacid, BGX_SMUX_RX_JABBER, MAX_FRAME_SIZE);846 847	return 0;848}849 850static int bgx_xaui_check_link(struct lmac *lmac)851{852	struct bgx *bgx = lmac->bgx;853	int lmacid = lmac->lmacid;854	int lmac_type = lmac->lmac_type;855	u64 cfg;856 857	if (lmac->use_training) {858		cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);859		if (!(cfg & (1ull << 13))) {860			cfg = (1ull << 13) | (1ull << 14);861			bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);862			cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL);863			cfg |= (1ull << 0);864			bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL, cfg);865			return -1;866		}867	}868 869	/* wait for PCS to come out of reset */870	if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET, true)) {871		dev_err(&bgx->pdev->dev, "BGX SPU reset not completed\n");872		return -1;873	}874 875	if ((lmac_type == BGX_MODE_10G_KR) || (lmac_type == BGX_MODE_XFI) ||876	    (lmac_type == BGX_MODE_40G_KR) || (lmac_type == BGX_MODE_XLAUI)) {877		if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_BR_STATUS1,878				 SPU_BR_STATUS_BLK_LOCK, false)) {879			dev_err(&bgx->pdev->dev,880				"SPU_BR_STATUS_BLK_LOCK not completed\n");881			return -1;882		}883	} else {884		if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_BX_STATUS,885				 SPU_BX_STATUS_RX_ALIGN, false)) {886			dev_err(&bgx->pdev->dev,887				"SPU_BX_STATUS_RX_ALIGN not completed\n");888			return -1;889		}890	}891 892	/* Clear rcvflt bit (latching high) and read it back */893	if (bgx_reg_read(bgx, lmacid, BGX_SPUX_STATUS2) & SPU_STATUS2_RCVFLT)894		bgx_reg_modify(bgx, lmacid,895			       BGX_SPUX_STATUS2, SPU_STATUS2_RCVFLT);896	if (bgx_reg_read(bgx, lmacid, BGX_SPUX_STATUS2) & SPU_STATUS2_RCVFLT) {897		dev_err(&bgx->pdev->dev, "Receive fault, retry training\n");898		if (lmac->use_training) {899			cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);900			if (!(cfg & (1ull << 13))) {901				cfg = (1ull << 13) | (1ull << 14);902				bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);903				cfg = bgx_reg_read(bgx, lmacid,904						   BGX_SPUX_BR_PMD_CRTL);905				cfg |= (1ull << 0);906				bgx_reg_write(bgx, lmacid,907					      BGX_SPUX_BR_PMD_CRTL, cfg);908				return -1;909			}910		}911		return -1;912	}913 914	/* Wait for BGX RX to be idle */915	if (bgx_poll_reg(bgx, lmacid, BGX_SMUX_CTL, SMU_CTL_RX_IDLE, false)) {916		dev_err(&bgx->pdev->dev, "SMU RX not idle\n");917		return -1;918	}919 920	/* Wait for BGX TX to be idle */921	if (bgx_poll_reg(bgx, lmacid, BGX_SMUX_CTL, SMU_CTL_TX_IDLE, false)) {922		dev_err(&bgx->pdev->dev, "SMU TX not idle\n");923		return -1;924	}925 926	/* Check for MAC RX faults */927	cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_RX_CTL);928	/* 0 - Link is okay, 1 - Local fault, 2 - Remote fault */929	cfg &= SMU_RX_CTL_STATUS;930	if (!cfg)931		return 0;932 933	/* Rx local/remote fault seen.934	 * Do lmac reinit to see if condition recovers935	 */936	bgx_lmac_xaui_init(bgx, lmac);937 938	return -1;939}940 941static void bgx_poll_for_sgmii_link(struct lmac *lmac)942{943	u64 pcs_link, an_result;944	u8 speed;945 946	pcs_link = bgx_reg_read(lmac->bgx, lmac->lmacid,947				BGX_GMP_PCS_MRX_STATUS);948 949	/*Link state bit is sticky, read it again*/950	if (!(pcs_link & PCS_MRX_STATUS_LINK))951		pcs_link = bgx_reg_read(lmac->bgx, lmac->lmacid,952					BGX_GMP_PCS_MRX_STATUS);953 954	if (bgx_poll_reg(lmac->bgx, lmac->lmacid, BGX_GMP_PCS_MRX_STATUS,955			 PCS_MRX_STATUS_AN_CPT, false)) {956		lmac->link_up = false;957		lmac->last_speed = SPEED_UNKNOWN;958		lmac->last_duplex = DUPLEX_UNKNOWN;959		goto next_poll;960	}961 962	lmac->link_up = ((pcs_link & PCS_MRX_STATUS_LINK) != 0) ? true : false;963	an_result = bgx_reg_read(lmac->bgx, lmac->lmacid,964				 BGX_GMP_PCS_ANX_AN_RESULTS);965 966	speed = (an_result >> 3) & 0x3;967	lmac->last_duplex = (an_result >> 1) & 0x1;968	switch (speed) {969	case 0:970		lmac->last_speed = SPEED_10;971		break;972	case 1:973		lmac->last_speed = SPEED_100;974		break;975	case 2:976		lmac->last_speed = SPEED_1000;977		break;978	default:979		lmac->link_up = false;980		lmac->last_speed = SPEED_UNKNOWN;981		lmac->last_duplex = DUPLEX_UNKNOWN;982		break;983	}984 985next_poll:986 987	if (lmac->last_link != lmac->link_up) {988		if (lmac->link_up)989			bgx_sgmii_change_link_state(lmac);990		lmac->last_link = lmac->link_up;991	}992 993	queue_delayed_work(lmac->check_link, &lmac->dwork, HZ * 3);994}995 996static void bgx_poll_for_link(struct work_struct *work)997{998	struct lmac *lmac;999	u64 spu_link, smu_link;1000 1001	lmac = container_of(work, struct lmac, dwork.work);1002	if (lmac->is_sgmii) {1003		bgx_poll_for_sgmii_link(lmac);1004		return;1005	}1006 1007	/* Receive link is latching low. Force it high and verify it */1008	bgx_reg_modify(lmac->bgx, lmac->lmacid,1009		       BGX_SPUX_STATUS1, SPU_STATUS1_RCV_LNK);1010	bgx_poll_reg(lmac->bgx, lmac->lmacid, BGX_SPUX_STATUS1,1011		     SPU_STATUS1_RCV_LNK, false);1012 1013	spu_link = bgx_reg_read(lmac->bgx, lmac->lmacid, BGX_SPUX_STATUS1);1014	smu_link = bgx_reg_read(lmac->bgx, lmac->lmacid, BGX_SMUX_RX_CTL);1015 1016	if ((spu_link & SPU_STATUS1_RCV_LNK) &&1017	    !(smu_link & SMU_RX_CTL_STATUS)) {1018		lmac->link_up = true;1019		if (lmac->lmac_type == BGX_MODE_XLAUI)1020			lmac->last_speed = SPEED_40000;1021		else1022			lmac->last_speed = SPEED_10000;1023		lmac->last_duplex = DUPLEX_FULL;1024	} else {1025		lmac->link_up = false;1026		lmac->last_speed = SPEED_UNKNOWN;1027		lmac->last_duplex = DUPLEX_UNKNOWN;1028	}1029 1030	if (lmac->last_link != lmac->link_up) {1031		if (lmac->link_up) {1032			if (bgx_xaui_check_link(lmac)) {1033				/* Errors, clear link_up state */1034				lmac->link_up = false;1035				lmac->last_speed = SPEED_UNKNOWN;1036				lmac->last_duplex = DUPLEX_UNKNOWN;1037			}1038		}1039		lmac->last_link = lmac->link_up;1040	}1041 1042	queue_delayed_work(lmac->check_link, &lmac->dwork, HZ * 2);1043}1044 1045static int phy_interface_mode(u8 lmac_type)1046{1047	if (lmac_type == BGX_MODE_QSGMII)1048		return PHY_INTERFACE_MODE_QSGMII;1049	if (lmac_type == BGX_MODE_RGMII)1050		return PHY_INTERFACE_MODE_RGMII_RXID;1051 1052	return PHY_INTERFACE_MODE_SGMII;1053}1054 1055static int bgx_lmac_enable(struct bgx *bgx, u8 lmacid)1056{1057	struct lmac *lmac;1058	u64 cfg;1059 1060	lmac = &bgx->lmac[lmacid];1061	lmac->bgx = bgx;1062 1063	if ((lmac->lmac_type == BGX_MODE_SGMII) ||1064	    (lmac->lmac_type == BGX_MODE_QSGMII) ||1065	    (lmac->lmac_type == BGX_MODE_RGMII)) {1066		lmac->is_sgmii = true;1067		if (bgx_lmac_sgmii_init(bgx, lmac))1068			return -1;1069	} else {1070		lmac->is_sgmii = false;1071		if (bgx_lmac_xaui_init(bgx, lmac))1072			return -1;1073	}1074 1075	if (lmac->is_sgmii) {1076		cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND);1077		cfg |= ((1ull << 2) | (1ull << 1)); /* FCS and PAD */1078		bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND, cfg);1079		bgx_reg_write(bgx, lmacid, BGX_GMP_GMI_TXX_MIN_PKT, 60 - 1);1080	} else {1081		cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_APPEND);1082		cfg |= ((1ull << 2) | (1ull << 1)); /* FCS and PAD */1083		bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_APPEND, cfg);1084		bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_MIN_PKT, 60 + 4);1085	}1086 1087	/* actual number of filters available to exact LMAC */1088	lmac->dmacs_count = (RX_DMAC_COUNT / bgx->lmac_count);1089	lmac->dmacs = kcalloc(lmac->dmacs_count, sizeof(*lmac->dmacs),1090			      GFP_KERNEL);1091	if (!lmac->dmacs)1092		return -ENOMEM;1093 1094	/* Enable lmac */1095	bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);1096 1097	/* Restore default cfg, incase low level firmware changed it */1098	bgx_reg_write(bgx, lmacid, BGX_CMRX_RX_DMAC_CTL, 0x03);1099 1100	if ((lmac->lmac_type != BGX_MODE_XFI) &&1101	    (lmac->lmac_type != BGX_MODE_XLAUI) &&1102	    (lmac->lmac_type != BGX_MODE_40G_KR) &&1103	    (lmac->lmac_type != BGX_MODE_10G_KR)) {1104		if (!lmac->phydev) {1105			if (lmac->autoneg) {1106				bgx_reg_write(bgx, lmacid,1107					      BGX_GMP_PCS_LINKX_TIMER,1108					      PCS_LINKX_TIMER_COUNT);1109				goto poll;1110			} else {1111				/* Default to below link speed and duplex */1112				lmac->link_up = true;1113				lmac->last_speed = SPEED_1000;1114				lmac->last_duplex = DUPLEX_FULL;1115				bgx_sgmii_change_link_state(lmac);1116				return 0;1117			}1118		}1119		lmac->phydev->dev_flags = 0;1120 1121		if (phy_connect_direct(lmac->netdev, lmac->phydev,1122				       bgx_lmac_handler,1123				       phy_interface_mode(lmac->lmac_type)))1124			return -ENODEV;1125 1126		phy_start(lmac->phydev);1127		return 0;1128	}1129 1130poll:1131	lmac->check_link = alloc_ordered_workqueue("check_link", WQ_MEM_RECLAIM);1132	if (!lmac->check_link)1133		return -ENOMEM;1134	INIT_DELAYED_WORK(&lmac->dwork, bgx_poll_for_link);1135	queue_delayed_work(lmac->check_link, &lmac->dwork, 0);1136 1137	return 0;1138}1139 1140static void bgx_lmac_disable(struct bgx *bgx, u8 lmacid)1141{1142	struct lmac *lmac;1143	u64 cfg;1144 1145	lmac = &bgx->lmac[lmacid];1146	if (lmac->check_link) {1147		/* Destroy work queue */1148		cancel_delayed_work_sync(&lmac->dwork);1149		destroy_workqueue(lmac->check_link);1150	}1151 1152	/* Disable packet reception */1153	cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);1154	cfg &= ~CMR_PKT_RX_EN;1155	bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);1156 1157	/* Give chance for Rx/Tx FIFO to get drained */1158	bgx_poll_reg(bgx, lmacid, BGX_CMRX_RX_FIFO_LEN, (u64)0x1FFF, true);1159	bgx_poll_reg(bgx, lmacid, BGX_CMRX_TX_FIFO_LEN, (u64)0x3FFF, true);1160 1161	/* Disable packet transmission */1162	cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);1163	cfg &= ~CMR_PKT_TX_EN;1164	bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);1165 1166	/* Disable serdes lanes */1167        if (!lmac->is_sgmii)1168                bgx_reg_modify(bgx, lmacid,1169                               BGX_SPUX_CONTROL1, SPU_CTL_LOW_POWER);1170        else1171                bgx_reg_modify(bgx, lmacid,1172                               BGX_GMP_PCS_MRX_CTL, PCS_MRX_CTL_PWR_DN);1173 1174	/* Disable LMAC */1175	cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);1176	cfg &= ~CMR_EN;1177	bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);1178 1179	bgx_flush_dmac_cam_filter(bgx, lmacid);1180	kfree(lmac->dmacs);1181 1182	if ((lmac->lmac_type != BGX_MODE_XFI) &&1183	    (lmac->lmac_type != BGX_MODE_XLAUI) &&1184	    (lmac->lmac_type != BGX_MODE_40G_KR) &&1185	    (lmac->lmac_type != BGX_MODE_10G_KR) && lmac->phydev)1186		phy_disconnect(lmac->phydev);1187 1188	lmac->phydev = NULL;1189}1190 1191static void bgx_init_hw(struct bgx *bgx)1192{1193	int i;1194	struct lmac *lmac;1195 1196	bgx_reg_modify(bgx, 0, BGX_CMR_GLOBAL_CFG, CMR_GLOBAL_CFG_FCS_STRIP);1197	if (bgx_reg_read(bgx, 0, BGX_CMR_BIST_STATUS))1198		dev_err(&bgx->pdev->dev, "BGX%d BIST failed\n", bgx->bgx_id);1199 1200	/* Set lmac type and lane2serdes mapping */1201	for (i = 0; i < bgx->lmac_count; i++) {1202		lmac = &bgx->lmac[i];1203		bgx_reg_write(bgx, i, BGX_CMRX_CFG,1204			      (lmac->lmac_type << 8) | lmac->lane_to_sds);1205		bgx->lmac[i].lmacid_bd = lmac_count;1206		lmac_count++;1207	}1208 1209	bgx_reg_write(bgx, 0, BGX_CMR_TX_LMACS, bgx->lmac_count);1210	bgx_reg_write(bgx, 0, BGX_CMR_RX_LMACS, bgx->lmac_count);1211 1212	/* Set the backpressure AND mask */1213	for (i = 0; i < bgx->lmac_count; i++)1214		bgx_reg_modify(bgx, 0, BGX_CMR_CHAN_MSK_AND,1215			       ((1ULL << MAX_BGX_CHANS_PER_LMAC) - 1) <<1216			       (i * MAX_BGX_CHANS_PER_LMAC));1217 1218	/* Disable all MAC filtering */1219	for (i = 0; i < RX_DMAC_COUNT; i++)1220		bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM + (i * 8), 0x00);1221 1222	/* Disable MAC steering (NCSI traffic) */1223	for (i = 0; i < RX_TRAFFIC_STEER_RULE_COUNT; i++)1224		bgx_reg_write(bgx, 0, BGX_CMR_RX_STEERING + (i * 8), 0x00);1225}1226 1227static u8 bgx_get_lane2sds_cfg(struct bgx *bgx, struct lmac *lmac)1228{1229	return (u8)(bgx_reg_read(bgx, lmac->lmacid, BGX_CMRX_CFG) & 0xFF);1230}1231 1232static void bgx_print_qlm_mode(struct bgx *bgx, u8 lmacid)1233{1234	struct device *dev = &bgx->pdev->dev;1235	struct lmac *lmac;1236	char str[27];1237 1238	if (!bgx->is_dlm && lmacid)1239		return;1240 1241	lmac = &bgx->lmac[lmacid];1242	if (!bgx->is_dlm)1243		sprintf(str, "BGX%d QLM mode", bgx->bgx_id);1244	else1245		sprintf(str, "BGX%d LMAC%d mode", bgx->bgx_id, lmacid);1246 1247	switch (lmac->lmac_type) {1248	case BGX_MODE_SGMII:1249		dev_info(dev, "%s: SGMII\n", (char *)str);1250		break;1251	case BGX_MODE_XAUI:1252		dev_info(dev, "%s: XAUI\n", (char *)str);1253		break;1254	case BGX_MODE_RXAUI:1255		dev_info(dev, "%s: RXAUI\n", (char *)str);1256		break;1257	case BGX_MODE_XFI:1258		if (!lmac->use_training)1259			dev_info(dev, "%s: XFI\n", (char *)str);1260		else1261			dev_info(dev, "%s: 10G_KR\n", (char *)str);1262		break;1263	case BGX_MODE_XLAUI:1264		if (!lmac->use_training)1265			dev_info(dev, "%s: XLAUI\n", (char *)str);1266		else1267			dev_info(dev, "%s: 40G_KR4\n", (char *)str);1268		break;1269	case BGX_MODE_QSGMII:1270		dev_info(dev, "%s: QSGMII\n", (char *)str);1271		break;1272	case BGX_MODE_RGMII:1273		dev_info(dev, "%s: RGMII\n", (char *)str);1274		break;1275	case BGX_MODE_INVALID:1276		/* Nothing to do */1277		break;1278	}1279}1280 1281static void lmac_set_lane2sds(struct bgx *bgx, struct lmac *lmac)1282{1283	switch (lmac->lmac_type) {1284	case BGX_MODE_SGMII:1285	case BGX_MODE_XFI:1286		lmac->lane_to_sds = lmac->lmacid;1287		break;1288	case BGX_MODE_XAUI:1289	case BGX_MODE_XLAUI:1290	case BGX_MODE_RGMII:1291		lmac->lane_to_sds = 0xE4;1292		break;1293	case BGX_MODE_RXAUI:1294		lmac->lane_to_sds = (lmac->lmacid) ? 0xE : 0x4;1295		break;1296	case BGX_MODE_QSGMII:1297		/* There is no way to determine if DLM0/2 is QSGMII or1298		 * DLM1/3 is configured to QSGMII as bootloader will1299		 * configure all LMACs, so take whatever is configured1300		 * by low level firmware.1301		 */1302		lmac->lane_to_sds = bgx_get_lane2sds_cfg(bgx, lmac);1303		break;1304	default:1305		lmac->lane_to_sds = 0;1306		break;1307	}1308}1309 1310static void lmac_set_training(struct bgx *bgx, struct lmac *lmac, int lmacid)1311{1312	if ((lmac->lmac_type != BGX_MODE_10G_KR) &&1313	    (lmac->lmac_type != BGX_MODE_40G_KR)) {1314		lmac->use_training = false;1315		return;1316	}1317 1318	lmac->use_training = bgx_reg_read(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL) &1319							SPU_PMD_CRTL_TRAIN_EN;1320}1321 1322static void bgx_set_lmac_config(struct bgx *bgx, u8 idx)1323{1324	struct lmac *lmac;1325	u64 cmr_cfg;1326	u8 lmac_type;1327	u8 lane_to_sds;1328 1329	lmac = &bgx->lmac[idx];1330 1331	if (!bgx->is_dlm || bgx->is_rgx) {1332		/* Read LMAC0 type to figure out QLM mode1333		 * This is configured by low level firmware1334		 */1335		cmr_cfg = bgx_reg_read(bgx, 0, BGX_CMRX_CFG);1336		lmac->lmac_type = (cmr_cfg >> 8) & 0x07;1337		if (bgx->is_rgx)1338			lmac->lmac_type = BGX_MODE_RGMII;1339		lmac_set_training(bgx, lmac, 0);1340		lmac_set_lane2sds(bgx, lmac);1341		return;1342	}1343 1344	/* For DLMs or SLMs on 80/81/83xx so many lane configurations1345	 * are possible and vary across boards. Also Kernel doesn't have1346	 * any way to identify board type/info and since firmware does,1347	 * just take lmac type and serdes lane config as is.1348	 */1349	cmr_cfg = bgx_reg_read(bgx, idx, BGX_CMRX_CFG);1350	lmac_type = (u8)((cmr_cfg >> 8) & 0x07);1351	lane_to_sds = (u8)(cmr_cfg & 0xFF);1352	/* Check if config is reset value */1353	if ((lmac_type == 0) && (lane_to_sds == 0xE4))1354		lmac->lmac_type = BGX_MODE_INVALID;1355	else1356		lmac->lmac_type = lmac_type;1357	lmac->lane_to_sds = lane_to_sds;1358	lmac_set_training(bgx, lmac, lmac->lmacid);1359}1360 1361static void bgx_get_qlm_mode(struct bgx *bgx)1362{1363	struct lmac *lmac;1364	u8  idx;1365 1366	/* Init all LMAC's type to invalid */1367	for (idx = 0; idx < bgx->max_lmac; idx++) {1368		lmac = &bgx->lmac[idx];1369		lmac->lmacid = idx;1370		lmac->lmac_type = BGX_MODE_INVALID;1371		lmac->use_training = false;1372	}1373 1374	/* It is assumed that low level firmware sets this value */1375	bgx->lmac_count = bgx_reg_read(bgx, 0, BGX_CMR_RX_LMACS) & 0x7;1376	if (bgx->lmac_count > bgx->max_lmac)1377		bgx->lmac_count = bgx->max_lmac;1378 1379	for (idx = 0; idx < bgx->lmac_count; idx++) {1380		bgx_set_lmac_config(bgx, idx);1381		bgx_print_qlm_mode(bgx, idx);1382	}1383}1384 1385#ifdef CONFIG_ACPI1386 1387static int acpi_get_mac_address(struct device *dev, struct acpi_device *adev,1388				u8 *dst)1389{1390	u8 mac[ETH_ALEN];1391	int ret;1392 1393	ret = fwnode_get_mac_address(acpi_fwnode_handle(adev), mac);1394	if (ret) {1395		dev_err(dev, "MAC address invalid: %pM\n", mac);1396		return -EINVAL;1397	}1398 1399	dev_info(dev, "MAC address set to: %pM\n", mac);1400 1401	ether_addr_copy(dst, mac);1402	return 0;1403}1404 1405/* Currently only sets the MAC address. */1406static acpi_status bgx_acpi_register_phy(acpi_handle handle,1407					 u32 lvl, void *context, void **rv)1408{1409	struct bgx *bgx = context;1410	struct device *dev = &bgx->pdev->dev;1411	struct acpi_device *adev;1412 1413	adev = acpi_fetch_acpi_dev(handle);1414	if (!adev)1415		goto out;1416 1417	acpi_get_mac_address(dev, adev, bgx->lmac[bgx->acpi_lmac_idx].mac);1418 1419	SET_NETDEV_DEV(bgx->lmac[bgx->acpi_lmac_idx].netdev, dev);1420 1421	bgx->lmac[bgx->acpi_lmac_idx].lmacid = bgx->acpi_lmac_idx;1422	bgx->acpi_lmac_idx++; /* move to next LMAC */1423out:1424	return AE_OK;1425}1426 1427static acpi_status bgx_acpi_match_id(acpi_handle handle, u32 lvl,1428				     void *context, void **ret_val)1429{1430	struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL };1431	struct bgx *bgx = context;1432	char bgx_sel[5];1433 1434	snprintf(bgx_sel, 5, "BGX%d", bgx->bgx_id);1435	if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &string))) {1436		pr_warn("Invalid link device\n");1437		return AE_OK;1438	}1439 1440	if (strncmp(string.pointer, bgx_sel, 4)) {1441		kfree(string.pointer);1442		return AE_OK;1443	}1444 1445	acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,1446			    bgx_acpi_register_phy, NULL, bgx, NULL);1447 1448	kfree(string.pointer);1449	return AE_CTRL_TERMINATE;1450}1451 1452static int bgx_init_acpi_phy(struct bgx *bgx)1453{1454	acpi_get_devices(NULL, bgx_acpi_match_id, bgx, (void **)NULL);1455	return 0;1456}1457 1458#else1459 1460static int bgx_init_acpi_phy(struct bgx *bgx)1461{1462	return -ENODEV;1463}1464 1465#endif /* CONFIG_ACPI */1466 1467#if IS_ENABLED(CONFIG_OF_MDIO)1468 1469static int bgx_init_of_phy(struct bgx *bgx)1470{1471	struct fwnode_handle *fwn;1472	struct device_node *node = NULL;1473	u8 lmac = 0;1474 1475	device_for_each_child_node(&bgx->pdev->dev, fwn) {1476		struct phy_device *pd;1477		struct device_node *phy_np;1478 1479		/* Should always be an OF node.  But if it is not, we1480		 * cannot handle it, so exit the loop.1481		 */1482		node = to_of_node(fwn);1483		if (!node)1484			break;1485 1486		of_get_mac_address(node, bgx->lmac[lmac].mac);1487 1488		SET_NETDEV_DEV(bgx->lmac[lmac].netdev, &bgx->pdev->dev);1489		bgx->lmac[lmac].lmacid = lmac;1490 1491		phy_np = of_parse_phandle(node, "phy-handle", 0);1492		/* If there is no phy or defective firmware presents1493		 * this cortina phy, for which there is no driver1494		 * support, ignore it.1495		 */1496		if (phy_np &&1497		    !of_device_is_compatible(phy_np, "cortina,cs4223-slice")) {1498			/* Wait until the phy drivers are available */1499			pd = of_phy_find_device(phy_np);1500			if (!pd)1501				goto defer;1502			bgx->lmac[lmac].phydev = pd;1503		}1504 1505		lmac++;1506		if (lmac == bgx->max_lmac) {1507			of_node_put(node);1508			break;1509		}1510	}1511	return 0;1512 1513defer:1514	/* We are bailing out, try not to leak device reference counts1515	 * for phy devices we may have already found.1516	 */1517	while (lmac) {1518		if (bgx->lmac[lmac].phydev) {1519			put_device(&bgx->lmac[lmac].phydev->mdio.dev);1520			bgx->lmac[lmac].phydev = NULL;1521		}1522		lmac--;1523	}1524	of_node_put(node);1525	return -EPROBE_DEFER;1526}1527 1528#else1529 1530static int bgx_init_of_phy(struct bgx *bgx)1531{1532	return -ENODEV;1533}1534 1535#endif /* CONFIG_OF_MDIO */1536 1537static int bgx_init_phy(struct bgx *bgx)1538{1539	if (!acpi_disabled)1540		return bgx_init_acpi_phy(bgx);1541 1542	return bgx_init_of_phy(bgx);1543}1544 1545static irqreturn_t bgx_intr_handler(int irq, void *data)1546{1547	struct bgx *bgx = (struct bgx *)data;1548	u64 status, val;1549	int lmac;1550 1551	for (lmac = 0; lmac < bgx->lmac_count; lmac++) {1552		status = bgx_reg_read(bgx, lmac, BGX_GMP_GMI_TXX_INT);1553		if (status & GMI_TXX_INT_UNDFLW) {1554			pci_err(bgx->pdev, "BGX%d lmac%d UNDFLW\n",1555				bgx->bgx_id, lmac);1556			val = bgx_reg_read(bgx, lmac, BGX_CMRX_CFG);1557			val &= ~CMR_EN;1558			bgx_reg_write(bgx, lmac, BGX_CMRX_CFG, val);1559			val |= CMR_EN;1560			bgx_reg_write(bgx, lmac, BGX_CMRX_CFG, val);1561		}1562		/* clear interrupts */1563		bgx_reg_write(bgx, lmac, BGX_GMP_GMI_TXX_INT, status);1564	}1565 1566	return IRQ_HANDLED;1567}1568 1569static void bgx_register_intr(struct pci_dev *pdev)1570{1571	struct bgx *bgx = pci_get_drvdata(pdev);1572	int ret;1573 1574	ret = pci_alloc_irq_vectors(pdev, BGX_LMAC_VEC_OFFSET,1575				    BGX_LMAC_VEC_OFFSET, PCI_IRQ_ALL_TYPES);1576	if (ret < 0) {1577		pci_err(pdev, "Req for #%d msix vectors failed\n",1578			BGX_LMAC_VEC_OFFSET);1579		return;1580	}1581	ret = pci_request_irq(pdev, GMPX_GMI_TX_INT, bgx_intr_handler, NULL,1582			      bgx, "BGX%d", bgx->bgx_id);1583	if (ret)1584		pci_free_irq(pdev, GMPX_GMI_TX_INT, bgx);1585}1586 1587static int bgx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)1588{1589	int err;1590	struct device *dev = &pdev->dev;1591	struct bgx *bgx = NULL;1592	u8 lmac;1593	u16 sdevid;1594 1595	bgx = devm_kzalloc(dev, sizeof(*bgx), GFP_KERNEL);1596	if (!bgx)1597		return -ENOMEM;1598	bgx->pdev = pdev;1599 1600	pci_set_drvdata(pdev, bgx);1601 1602	err = pcim_enable_device(pdev);1603	if (err) {1604		pci_set_drvdata(pdev, NULL);1605		return dev_err_probe(dev, err, "Failed to enable PCI device\n");1606	}1607 1608	err = pci_request_regions(pdev, DRV_NAME);1609	if (err) {1610		dev_err(dev, "PCI request regions failed 0x%x\n", err);1611		goto err_disable_device;1612	}1613 1614	/* MAP configuration registers */1615	bgx->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0);1616	if (!bgx->reg_base) {1617		dev_err(dev, "BGX: Cannot map CSR memory space, aborting\n");1618		err = -ENOMEM;1619		goto err_release_regions;1620	}1621 1622	set_max_bgx_per_node(pdev);1623 1624	pci_read_config_word(pdev, PCI_DEVICE_ID, &sdevid);1625	if (sdevid != PCI_DEVICE_ID_THUNDER_RGX) {1626		bgx->bgx_id = (pci_resource_start(pdev,1627			PCI_CFG_REG_BAR_NUM) >> 24) & BGX_ID_MASK;1628		bgx->bgx_id += nic_get_node_id(pdev) * max_bgx_per_node;1629		bgx->max_lmac = MAX_LMAC_PER_BGX;1630		bgx_vnic[bgx->bgx_id] = bgx;1631	} else {1632		bgx->is_rgx = true;1633		bgx->max_lmac = 1;1634		bgx->bgx_id = MAX_BGX_PER_CN81XX - 1;1635		bgx_vnic[bgx->bgx_id] = bgx;1636		xcv_init_hw();1637	}1638 1639	/* On 81xx all are DLMs and on 83xx there are 3 BGX QLMs and one1640	 * BGX i.e BGX2 can be split across 2 DLMs.1641	 */1642	pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &sdevid);1643	if ((sdevid == PCI_SUBSYS_DEVID_81XX_BGX) ||1644	    ((sdevid == PCI_SUBSYS_DEVID_83XX_BGX) && (bgx->bgx_id == 2)))1645		bgx->is_dlm = true;1646 1647	bgx_get_qlm_mode(bgx);1648 1649	for (lmac = 0; lmac < bgx->lmac_count; lmac++) {1650		struct lmac *lmacp, **priv;1651 1652		lmacp = &bgx->lmac[lmac];1653		lmacp->netdev = alloc_netdev_dummy(sizeof(struct lmac *));1654 1655		if (!lmacp->netdev) {1656			for (int i = 0; i < lmac; i++)1657				free_netdev(bgx->lmac[i].netdev);1658			err = -ENOMEM;1659			goto err_enable;1660		}1661 1662		priv = netdev_priv(lmacp->netdev);1663		*priv = lmacp;1664	}1665 1666	err = bgx_init_phy(bgx);1667	if (err)1668		goto err_enable;1669 1670	bgx_init_hw(bgx);1671 1672	bgx_register_intr(pdev);1673 1674	/* Enable all LMACs */1675	for (lmac = 0; lmac < bgx->lmac_count; lmac++) {1676		err = bgx_lmac_enable(bgx, lmac);1677		if (err) {1678			dev_err(dev, "BGX%d failed to enable lmac%d\n",1679				bgx->bgx_id, lmac);1680			while (lmac)1681				bgx_lmac_disable(bgx, --lmac);1682			goto err_enable;1683		}1684	}1685 1686	return 0;1687 1688err_enable:1689	bgx_vnic[bgx->bgx_id] = NULL;1690	pci_free_irq(pdev, GMPX_GMI_TX_INT, bgx);1691err_release_regions:1692	pci_release_regions(pdev);1693err_disable_device:1694	pci_disable_device(pdev);1695	pci_set_drvdata(pdev, NULL);1696	return err;1697}1698 1699static void bgx_remove(struct pci_dev *pdev)1700{1701	struct bgx *bgx = pci_get_drvdata(pdev);1702	u8 lmac;1703 1704	/* Disable all LMACs */1705	for (lmac = 0; lmac < bgx->lmac_count; lmac++) {1706		bgx_lmac_disable(bgx, lmac);1707		free_netdev(bgx->lmac[lmac].netdev);1708	}1709 1710	pci_free_irq(pdev, GMPX_GMI_TX_INT, bgx);1711 1712	bgx_vnic[bgx->bgx_id] = NULL;1713	pci_release_regions(pdev);1714	pci_disable_device(pdev);1715	pci_set_drvdata(pdev, NULL);1716}1717 1718static struct pci_driver bgx_driver = {1719	.name = DRV_NAME,1720	.id_table = bgx_id_table,1721	.probe = bgx_probe,1722	.remove = bgx_remove,1723};1724 1725static int __init bgx_init_module(void)1726{1727	pr_info("%s, ver %s\n", DRV_NAME, DRV_VERSION);1728 1729	return pci_register_driver(&bgx_driver);1730}1731 1732static void __exit bgx_cleanup_module(void)1733{1734	pci_unregister_driver(&bgx_driver);1735}1736 1737module_init(bgx_init_module);1738module_exit(bgx_cleanup_module);1739