Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:

 1) Support ipv6 checksum offload in sunvnet driver, from Shannon
    Nelson.

 2) Move to RB-tree instead of custom AVL code in inetpeer, from Eric
    Dumazet.

 3) Allow generic XDP to work on virtual devices, from John Fastabend.

 4) Add bpf device maps and XDP_REDIRECT, which can be used to build
    arbitrary switching frameworks using XDP. From John Fastabend.

 5) Remove UFO offloads from the tree, gave us little other than bugs.

 6) Remove the IPSEC flow cache, from Florian Westphal.

 7) Support ipv6 route offload in mlxsw driver.

 8) Support VF representors in bnxt_en, from Sathya Perla.

 9) Add support for forward error correction modes to ethtool, from
    Vidya Sagar Ravipati.

10) Add time filter for packet scheduler action dumping, from Jamal Hadi
    Salim.

11) Extend the zerocopy sendmsg() used by virtio and tap to regular
    sockets via MSG_ZEROCOPY. From Willem de Bruijn.

12) Significantly rework value tracking in the BPF verifier, from Edward
    Cree.

13) Add new jump instructions to eBPF, from Daniel Borkmann.

14) Rework rtnetlink plumbing so that operations can be run without
    taking the RTNL semaphore. From Florian Westphal.

15) Support XDP in tap driver, from Jason Wang.

16) Add 32-bit eBPF JIT for ARM, from Shubham Bansal.

17) Add Huawei hinic ethernet driver.

18) Allow to report MD5 keys in TCP inet_diag dumps, from Ivan
    Delalande.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1780 commits)
  i40e: point wb_desc at the nvm_wb_desc during i40e_read_nvm_aq
  i40e: avoid NVM acquire deadlock during NVM update
  drivers: net: xgene: Remove return statement from void function
  drivers: net: xgene: Configure tx/rx delay for ACPI
  drivers: net: xgene: Read tx/rx delay for ACPI
  rocker: fix kcalloc parameter order
  rds: Fix non-atomic operation on shared flag variable
  net: sched: don't use GFP_KERNEL under spin lock
  vhost_net: correctly check tx avail during rx busy polling
  net: mdio-mux: add mdio_mux parameter to mdio_mux_init()
  rxrpc: Make service connection lookup always check for retry
  net: stmmac: Delete dead code for MDIO registration
  gianfar: Fix Tx flow control deactivation
  cxgb4: Ignore MPS_TX_INT_CAUSE[Bubble] for T6
  cxgb4: Fix pause frame count in t4_get_port_stats
  cxgb4: fix memory leak
  tun: rename generic_xdp to skb_xdp
  tun: reserve extra headroom only when XDP is set
  net: dsa: bcm_sf2: Configure IMP port TC2QOS mapping
  net: dsa: bcm_sf2: Advertise number of egress queues
  ...

1 files changed, 181 insertions, 43 deletions

diff --git a/drivers/net/ethernet/sfc/mcdi_port.c b/drivers/net/ethernet/sfc/mcdi_port.c
index 990a63d7fcb7..c7407d129c7d 100644
--- a/drivers/net/ethernet/sfc/mcdi_port.c
+++ b/drivers/net/ethernet/sfc/mcdi_port.c
@@ -746,59 +746,171 @@ static const char *efx_mcdi_phy_test_name(struct efx_nic *efx,
 	return NULL;
 }
 
-#define SFP_PAGE_SIZE	128
-#define SFP_NUM_PAGES	2
-static int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx,
-					  struct ethtool_eeprom *ee, u8 *data)
+#define SFP_PAGE_SIZE		128
+#define SFF_DIAG_TYPE_OFFSET	92
+#define SFF_DIAG_ADDR_CHANGE	BIT(2)
+#define SFF_8079_NUM_PAGES	2
+#define SFF_8472_NUM_PAGES	4
+#define SFF_8436_NUM_PAGES	5
+#define SFF_DMT_LEVEL_OFFSET	94
+
+/** efx_mcdi_phy_get_module_eeprom_page() - Get a single page of module eeprom
+ * @efx:	NIC context
+ * @page:	EEPROM page number
+ * @data:	Destination data pointer
+ * @offset:	Offset in page to copy from in to data
+ * @space:	Space available in data
+ *
+ * Return:
+ *   >=0 - amount of data copied
+ *   <0  - error
+ */
+static int efx_mcdi_phy_get_module_eeprom_page(struct efx_nic *efx,
+					       unsigned int page,
+					       u8 *data, ssize_t offset,
+					       ssize_t space)
 {
 	MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX);
 	MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_PHY_MEDIA_INFO_IN_LEN);
 	size_t outlen;
-	int rc;
 	unsigned int payload_len;
-	unsigned int space_remaining = ee->len;
-	unsigned int page;
-	unsigned int page_off;
 	unsigned int to_copy;
-	u8 *user_data = data;
+	int rc;
 
-	BUILD_BUG_ON(SFP_PAGE_SIZE * SFP_NUM_PAGES != ETH_MODULE_SFF_8079_LEN);
+	if (offset > SFP_PAGE_SIZE)
+		return -EINVAL;
 
-	page_off = ee->offset % SFP_PAGE_SIZE;
-	page = ee->offset / SFP_PAGE_SIZE;
+	to_copy = min(space, SFP_PAGE_SIZE - offset);
 
-	while (space_remaining && (page < SFP_NUM_PAGES)) {
-		MCDI_SET_DWORD(inbuf, GET_PHY_MEDIA_INFO_IN_PAGE, page);
+	MCDI_SET_DWORD(inbuf, GET_PHY_MEDIA_INFO_IN_PAGE, page);
+	rc = efx_mcdi_rpc_quiet(efx, MC_CMD_GET_PHY_MEDIA_INFO,
+				inbuf, sizeof(inbuf),
+				outbuf, sizeof(outbuf),
+				&outlen);
 
-		rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_MEDIA_INFO,
-				  inbuf, sizeof(inbuf),
-				  outbuf, sizeof(outbuf),
-				  &outlen);
-		if (rc)
-			return rc;
+	if (rc)
+		return rc;
+
+	if (outlen < (MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST +
+			SFP_PAGE_SIZE))
+		return -EIO;
+
+	payload_len = MCDI_DWORD(outbuf, GET_PHY_MEDIA_INFO_OUT_DATALEN);
+	if (payload_len != SFP_PAGE_SIZE)
+		return -EIO;
 
-		if (outlen < (MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST +
-			      SFP_PAGE_SIZE))
-			return -EIO;
+	memcpy(data, MCDI_PTR(outbuf, GET_PHY_MEDIA_INFO_OUT_DATA) + offset,
+	       to_copy);
 
-		payload_len = MCDI_DWORD(outbuf,
-					 GET_PHY_MEDIA_INFO_OUT_DATALEN);
-		if (payload_len != SFP_PAGE_SIZE)
-			return -EIO;
+	return to_copy;
+}
 
-		/* Copy as much as we can into data */
-		payload_len -= page_off;
-		to_copy = (space_remaining < payload_len) ?
-			space_remaining : payload_len;
+static int efx_mcdi_phy_get_module_eeprom_byte(struct efx_nic *efx,
+					       unsigned int page,
+					       u8 byte)
+{
+	int rc;
+	u8 data;
 
-		memcpy(user_data,
-		       MCDI_PTR(outbuf, GET_PHY_MEDIA_INFO_OUT_DATA) + page_off,
-		       to_copy);
+	rc = efx_mcdi_phy_get_module_eeprom_page(efx, page, &data, byte, 1);
+	if (rc == 1)
+		return data;
+
+	return rc;
+}
+
+static int efx_mcdi_phy_diag_type(struct efx_nic *efx)
+{
+	/* Page zero of the EEPROM includes the diagnostic type at byte 92. */
+	return efx_mcdi_phy_get_module_eeprom_byte(efx, 0,
+						   SFF_DIAG_TYPE_OFFSET);
+}
 
-		space_remaining -= to_copy;
-		user_data += to_copy;
-		page_off = 0;
-		page++;
+static int efx_mcdi_phy_sff_8472_level(struct efx_nic *efx)
+{
+	/* Page zero of the EEPROM includes the DMT level at byte 94. */
+	return efx_mcdi_phy_get_module_eeprom_byte(efx, 0,
+						   SFF_DMT_LEVEL_OFFSET);
+}
+
+static u32 efx_mcdi_phy_module_type(struct efx_nic *efx)
+{
+	struct efx_mcdi_phy_data *phy_data = efx->phy_data;
+
+	if (phy_data->media != MC_CMD_MEDIA_QSFP_PLUS)
+		return phy_data->media;
+
+	/* A QSFP+ NIC may actually have an SFP+ module attached.
+	 * The ID is page 0, byte 0.
+	 */
+	switch (efx_mcdi_phy_get_module_eeprom_byte(efx, 0, 0)) {
+	case 0x3:
+		return MC_CMD_MEDIA_SFP_PLUS;
+	case 0xc:
+	case 0xd:
+		return MC_CMD_MEDIA_QSFP_PLUS;
+	default:
+		return 0;
+	}
+}
+
+static int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx,
+					  struct ethtool_eeprom *ee, u8 *data)
+{
+	int rc;
+	ssize_t space_remaining = ee->len;
+	unsigned int page_off;
+	bool ignore_missing;
+	int num_pages;
+	int page;
+
+	switch (efx_mcdi_phy_module_type(efx)) {
+	case MC_CMD_MEDIA_SFP_PLUS:
+		num_pages = efx_mcdi_phy_sff_8472_level(efx) > 0 ?
+				SFF_8472_NUM_PAGES : SFF_8079_NUM_PAGES;
+		page = 0;
+		ignore_missing = false;
+		break;
+	case MC_CMD_MEDIA_QSFP_PLUS:
+		num_pages = SFF_8436_NUM_PAGES;
+		page = -1; /* We obtain the lower page by asking for -1. */
+		ignore_missing = true; /* Ignore missing pages after page 0. */
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	page_off = ee->offset % SFP_PAGE_SIZE;
+	page += ee->offset / SFP_PAGE_SIZE;
+
+	while (space_remaining && (page < num_pages)) {
+		rc = efx_mcdi_phy_get_module_eeprom_page(efx, page,
+							 data, page_off,
+							 space_remaining);
+
+		if (rc > 0) {
+			space_remaining -= rc;
+			data += rc;
+			page_off = 0;
+			page++;
+		} else if (rc == 0) {
+			space_remaining = 0;
+		} else if (ignore_missing && (page > 0)) {
+			int intended_size = SFP_PAGE_SIZE - page_off;
+
+			space_remaining -= intended_size;
+			if (space_remaining < 0) {
+				space_remaining = 0;
+			} else {
+				memset(data, 0, intended_size);
+				data += intended_size;
+				page_off = 0;
+				page++;
+				rc = 0;
+			}
+		} else {
+			return rc;
+		}
 	}
 
 	return 0;
@@ -807,16 +919,42 @@ static int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx,
 static int efx_mcdi_phy_get_module_info(struct efx_nic *efx,
 					struct ethtool_modinfo *modinfo)
 {
-	struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
+	int sff_8472_level;
+	int diag_type;
 
-	switch (phy_cfg->media) {
+	switch (efx_mcdi_phy_module_type(efx)) {
 	case MC_CMD_MEDIA_SFP_PLUS:
-		modinfo->type = ETH_MODULE_SFF_8079;
-		modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
-		return 0;
+		sff_8472_level = efx_mcdi_phy_sff_8472_level(efx);
+
+		/* If we can't read the diagnostics level we have none. */
+		if (sff_8472_level < 0)
+			return -EOPNOTSUPP;
+
+		/* Check if this module requires the (unsupported) address
+		 * change operation.
+		 */
+		diag_type = efx_mcdi_phy_diag_type(efx);
+
+		if ((sff_8472_level == 0) ||
+		    (diag_type & SFF_DIAG_ADDR_CHANGE)) {
+			modinfo->type = ETH_MODULE_SFF_8079;
+			modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
+		} else {
+			modinfo->type = ETH_MODULE_SFF_8472;
+			modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
+		}
+		break;
+
+	case MC_CMD_MEDIA_QSFP_PLUS:
+		modinfo->type = ETH_MODULE_SFF_8436;
+		modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN;
+		break;
+
 	default:
 		return -EOPNOTSUPP;
 	}
+
+	return 0;
 }
 
 static const struct efx_phy_operations efx_mcdi_phy_ops = {