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-rw-r--r--drivers/net/ethernet/netronome/nfp/nfp_abi.h59
-rw-r--r--drivers/net/ethernet/netronome/nfp/nfp_main.c108
-rw-r--r--drivers/net/ethernet/netronome/nfp/nfp_main.h6
3 files changed, 173 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_abi.h b/drivers/net/ethernet/netronome/nfp/nfp_abi.h
new file mode 100644
index 000000000000..ce3935d6729b
--- /dev/null
+++ b/drivers/net/ethernet/netronome/nfp/nfp_abi.h
@@ -0,0 +1,59 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */
+/*
+ * Copyright (C) 2018 Netronome Systems, Inc.
+ *
+ * This software is dual licensed under the GNU General License Version 2,
+ * June 1991 as shown in the file COPYING in the top-level directory of this
+ * source tree or the BSD 2-Clause License provided below. You have the
+ * option to license this software under the complete terms of either license.
+ *
+ * The BSD 2-Clause License:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef __NFP_ABI__
+#define __NFP_ABI__ 1
+
+#include <linux/types.h>
+
+#define NFP_MBOX_SYM_NAME "_abi_nfd_pf%u_mbox"
+#define NFP_MBOX_SYM_MIN_SIZE 16 /* When no data needed */
+
+#define NFP_MBOX_CMD 0x00
+#define NFP_MBOX_RET 0x04
+#define NFP_MBOX_DATA_LEN 0x08
+#define NFP_MBOX_RESERVED 0x0c
+#define NFP_MBOX_DATA 0x10
+
+/**
+ * enum nfp_mbox_cmd - PF mailbox commands
+ *
+ * @NFP_MBOX_NO_CMD: null command
+ * Used to indicate previous command has finished.
+ */
+enum nfp_mbox_cmd {
+ NFP_MBOX_NO_CMD = 0x00,
+};
+
+#endif
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_main.c b/drivers/net/ethernet/netronome/nfp/nfp_main.c
index 1ef3623c6e1c..46b76d5a726c 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_main.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_main.c
@@ -55,6 +55,7 @@
#include "nfpcore/nfp6000_pcie.h"
+#include "nfp_abi.h"
#include "nfp_app.h"
#include "nfp_main.h"
#include "nfp_net.h"
@@ -107,6 +108,90 @@ nfp_pf_map_rtsym(struct nfp_pf *pf, const char *name, const char *sym_fmt,
return nfp_rtsym_map(pf->rtbl, pf_symbol, name, min_size, area);
}
+/* Callers should hold the devlink instance lock */
+int nfp_mbox_cmd(struct nfp_pf *pf, u32 cmd, void *in_data, u64 in_length,
+ void *out_data, u64 out_length)
+{
+ unsigned long long addr;
+ unsigned long err_at;
+ u64 max_data_sz;
+ u32 val = 0;
+ u32 cpp_id;
+ int n, err;
+
+ if (!pf->mbox)
+ return -EOPNOTSUPP;
+
+ cpp_id = NFP_CPP_ISLAND_ID(pf->mbox->target, NFP_CPP_ACTION_RW, 0,
+ pf->mbox->domain);
+ addr = pf->mbox->addr;
+ max_data_sz = pf->mbox->size - NFP_MBOX_SYM_MIN_SIZE;
+
+ /* Check if cmd field is clear */
+ err = nfp_cpp_readl(pf->cpp, cpp_id, addr + NFP_MBOX_CMD, &val);
+ if (err || val) {
+ nfp_warn(pf->cpp, "failed to issue command (%u): %u, err: %d\n",
+ cmd, val, err);
+ return err ?: -EBUSY;
+ }
+
+ in_length = min(in_length, max_data_sz);
+ n = nfp_cpp_write(pf->cpp, cpp_id, addr + NFP_MBOX_DATA,
+ in_data, in_length);
+ if (n != in_length)
+ return -EIO;
+ /* Write data_len and wipe reserved */
+ err = nfp_cpp_writeq(pf->cpp, cpp_id, addr + NFP_MBOX_DATA_LEN,
+ in_length);
+ if (err)
+ return err;
+
+ /* Read back for ordering */
+ err = nfp_cpp_readl(pf->cpp, cpp_id, addr + NFP_MBOX_DATA_LEN, &val);
+ if (err)
+ return err;
+
+ /* Write cmd and wipe return value */
+ err = nfp_cpp_writeq(pf->cpp, cpp_id, addr + NFP_MBOX_CMD, cmd);
+ if (err)
+ return err;
+
+ err_at = jiffies + 5 * HZ;
+ while (true) {
+ /* Wait for command to go to 0 (NFP_MBOX_NO_CMD) */
+ err = nfp_cpp_readl(pf->cpp, cpp_id, addr + NFP_MBOX_CMD, &val);
+ if (err)
+ return err;
+ if (!val)
+ break;
+
+ if (time_is_before_eq_jiffies(err_at))
+ return -ETIMEDOUT;
+
+ msleep(5);
+ }
+
+ /* Copy output if any (could be error info, do it before reading ret) */
+ err = nfp_cpp_readl(pf->cpp, cpp_id, addr + NFP_MBOX_DATA_LEN, &val);
+ if (err)
+ return err;
+
+ out_length = min_t(u32, val, min(out_length, max_data_sz));
+ n = nfp_cpp_read(pf->cpp, cpp_id, addr + NFP_MBOX_DATA,
+ out_data, out_length);
+ if (n != out_length)
+ return -EIO;
+
+ /* Check if there is an error */
+ err = nfp_cpp_readl(pf->cpp, cpp_id, addr + NFP_MBOX_RET, &val);
+ if (err)
+ return err;
+ if (val)
+ return -val;
+
+ return out_length;
+}
+
static bool nfp_board_ready(struct nfp_pf *pf)
{
const char *cp;
@@ -468,6 +553,25 @@ static void nfp_fw_unload(struct nfp_pf *pf)
nfp_nsp_close(nsp);
}
+static int nfp_pf_find_rtsyms(struct nfp_pf *pf)
+{
+ char pf_symbol[256];
+ unsigned int pf_id;
+
+ pf_id = nfp_cppcore_pcie_unit(pf->cpp);
+
+ /* Optional per-PCI PF mailbox */
+ snprintf(pf_symbol, sizeof(pf_symbol), NFP_MBOX_SYM_NAME, pf_id);
+ pf->mbox = nfp_rtsym_lookup(pf->rtbl, pf_symbol);
+ if (pf->mbox && pf->mbox->size < NFP_MBOX_SYM_MIN_SIZE) {
+ nfp_err(pf->cpp, "PF mailbox symbol too small: %llu < %d\n",
+ pf->mbox->size, NFP_MBOX_SYM_MIN_SIZE);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static int nfp_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *pci_id)
{
@@ -542,6 +646,10 @@ static int nfp_pci_probe(struct pci_dev *pdev,
pf->mip = nfp_mip_open(pf->cpp);
pf->rtbl = __nfp_rtsym_table_read(pf->cpp, pf->mip);
+ err = nfp_pf_find_rtsyms(pf);
+ if (err)
+ goto err_fw_unload;
+
pf->dump_flag = NFP_DUMP_NSP_DIAG;
pf->dumpspec = nfp_net_dump_load_dumpspec(pf->cpp, pf->rtbl);
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_main.h b/drivers/net/ethernet/netronome/nfp/nfp_main.h
index 5b028486c894..e3e1fa84ccd7 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_main.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_main.h
@@ -60,6 +60,7 @@ struct nfp_mip;
struct nfp_net;
struct nfp_nsp_identify;
struct nfp_port;
+struct nfp_rtsym;
struct nfp_rtsym_table;
/**
@@ -87,6 +88,7 @@ struct nfp_dumpspec {
* @vf_cfg_mem: Pointer to mapped VF configuration area
* @vfcfg_tbl2_area: Pointer to the CPP area for the VF config table
* @vfcfg_tbl2: Pointer to mapped VF config table
+ * @mbox: RTSym of per-PCI PF mailbox (under devlink lock)
* @irq_entries: Array of MSI-X entries for all vNICs
* @limit_vfs: Number of VFs supported by firmware (~0 for PCI limit)
* @num_vfs: Number of SR-IOV VFs enabled
@@ -127,6 +129,8 @@ struct nfp_pf {
struct nfp_cpp_area *vfcfg_tbl2_area;
u8 __iomem *vfcfg_tbl2;
+ const struct nfp_rtsym *mbox;
+
struct msix_entry *irq_entries;
unsigned int limit_vfs;
@@ -182,6 +186,8 @@ int nfp_pf_rtsym_read_optional(struct nfp_pf *pf, const char *format,
u8 __iomem *
nfp_pf_map_rtsym(struct nfp_pf *pf, const char *name, const char *sym_fmt,
unsigned int min_size, struct nfp_cpp_area **area);
+int nfp_mbox_cmd(struct nfp_pf *pf, u32 cmd, void *in_data, u64 in_length,
+ void *out_data, u64 out_length);
enum nfp_dump_diag {
NFP_DUMP_NSP_DIAG = 0,
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-17 06:46:30 +0000