Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 556 insertions, 0 deletions

diff --git a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_rtsym.c b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_rtsym.c
new file mode 100644
index 0000000000..2260c2403a
--- /dev/null
+++ b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_rtsym.c
@@ -0,0 +1,556 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/* Copyright (C) 2015-2018 Netronome Systems, Inc. */
+
+/*
+ * nfp_rtsym.c
+ * Interface for accessing run-time symbol table
+ * Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
+ *          Jason McMullan <jason.mcmullan@netronome.com>
+ *          Espen Skoglund <espen.skoglund@netronome.com>
+ *          Francois H. Theron <francois.theron@netronome.com>
+ */
+
+#include <asm/unaligned.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/io-64-nonatomic-hi-lo.h>
+
+#include "nfp.h"
+#include "nfp_cpp.h"
+#include "nfp_nffw.h"
+#include "nfp6000/nfp6000.h"
+
+/* These need to match the linker */
+#define SYM_TGT_LMEM		0
+#define SYM_TGT_EMU_CACHE	0x17
+
+struct nfp_rtsym_entry {
+	u8	type;
+	u8	target;
+	u8	island;
+	u8	addr_hi;
+	__le32	addr_lo;
+	__le16	name;
+	u8	menum;
+	u8	size_hi;
+	__le32	size_lo;
+};
+
+struct nfp_rtsym_table {
+	struct nfp_cpp *cpp;
+	int num;
+	char *strtab;
+	struct nfp_rtsym symtab[];
+};
+
+static int nfp_meid(u8 island_id, u8 menum)
+{
+	return (island_id & 0x3F) == island_id && menum < 12 ?
+		(island_id << 4) | (menum + 4) : -1;
+}
+
+static void
+nfp_rtsym_sw_entry_init(struct nfp_rtsym_table *cache, u32 strtab_size,
+			struct nfp_rtsym *sw, struct nfp_rtsym_entry *fw)
+{
+	sw->type = fw->type;
+	sw->name = cache->strtab + le16_to_cpu(fw->name) % strtab_size;
+	sw->addr = ((u64)fw->addr_hi << 32) | le32_to_cpu(fw->addr_lo);
+	sw->size = ((u64)fw->size_hi << 32) | le32_to_cpu(fw->size_lo);
+
+	switch (fw->target) {
+	case SYM_TGT_LMEM:
+		sw->target = NFP_RTSYM_TARGET_LMEM;
+		break;
+	case SYM_TGT_EMU_CACHE:
+		sw->target = NFP_RTSYM_TARGET_EMU_CACHE;
+		break;
+	default:
+		sw->target = fw->target;
+		break;
+	}
+
+	if (fw->menum != 0xff)
+		sw->domain = nfp_meid(fw->island, fw->menum);
+	else if (fw->island != 0xff)
+		sw->domain = fw->island;
+	else
+		sw->domain = -1;
+}
+
+struct nfp_rtsym_table *nfp_rtsym_table_read(struct nfp_cpp *cpp)
+{
+	struct nfp_rtsym_table *rtbl;
+	const struct nfp_mip *mip;
+
+	mip = nfp_mip_open(cpp);
+	rtbl = __nfp_rtsym_table_read(cpp, mip);
+	nfp_mip_close(mip);
+
+	return rtbl;
+}
+
+struct nfp_rtsym_table *
+__nfp_rtsym_table_read(struct nfp_cpp *cpp, const struct nfp_mip *mip)
+{
+	const u32 dram = NFP_CPP_ID(NFP_CPP_TARGET_MU, NFP_CPP_ACTION_RW, 0) |
+		NFP_ISL_EMEM0;
+	u32 strtab_addr, symtab_addr, strtab_size, symtab_size;
+	struct nfp_rtsym_entry *rtsymtab;
+	struct nfp_rtsym_table *cache;
+	int err, n, size;
+
+	if (!mip)
+		return NULL;
+
+	nfp_mip_strtab(mip, &strtab_addr, &strtab_size);
+	nfp_mip_symtab(mip, &symtab_addr, &symtab_size);
+
+	if (!symtab_size || !strtab_size || symtab_size % sizeof(*rtsymtab))
+		return NULL;
+
+	/* Align to 64 bits */
+	symtab_size = round_up(symtab_size, 8);
+	strtab_size = round_up(strtab_size, 8);
+
+	rtsymtab = kmalloc(symtab_size, GFP_KERNEL);
+	if (!rtsymtab)
+		return NULL;
+
+	size = sizeof(*cache);
+	size += symtab_size / sizeof(*rtsymtab) * sizeof(struct nfp_rtsym);
+	size +=	strtab_size + 1;
+	cache = kmalloc(size, GFP_KERNEL);
+	if (!cache)
+		goto exit_free_rtsym_raw;
+
+	cache->cpp = cpp;
+	cache->num = symtab_size / sizeof(*rtsymtab);
+	cache->strtab = (void *)&cache->symtab[cache->num];
+
+	err = nfp_cpp_read(cpp, dram, symtab_addr, rtsymtab, symtab_size);
+	if (err != symtab_size)
+		goto exit_free_cache;
+
+	err = nfp_cpp_read(cpp, dram, strtab_addr, cache->strtab, strtab_size);
+	if (err != strtab_size)
+		goto exit_free_cache;
+	cache->strtab[strtab_size] = '\0';
+
+	for (n = 0; n < cache->num; n++)
+		nfp_rtsym_sw_entry_init(cache, strtab_size,
+					&cache->symtab[n], &rtsymtab[n]);
+
+	kfree(rtsymtab);
+
+	return cache;
+
+exit_free_cache:
+	kfree(cache);
+exit_free_rtsym_raw:
+	kfree(rtsymtab);
+	return NULL;
+}
+
+/**
+ * nfp_rtsym_count() - Get the number of RTSYM descriptors
+ * @rtbl:	NFP RTsym table
+ *
+ * Return: Number of RTSYM descriptors
+ */
+int nfp_rtsym_count(struct nfp_rtsym_table *rtbl)
+{
+	if (!rtbl)
+		return -EINVAL;
+	return rtbl->num;
+}
+
+/**
+ * nfp_rtsym_get() - Get the Nth RTSYM descriptor
+ * @rtbl:	NFP RTsym table
+ * @idx:	Index (0-based) of the RTSYM descriptor
+ *
+ * Return: const pointer to a struct nfp_rtsym descriptor, or NULL
+ */
+const struct nfp_rtsym *nfp_rtsym_get(struct nfp_rtsym_table *rtbl, int idx)
+{
+	if (!rtbl)
+		return NULL;
+	if (idx >= rtbl->num)
+		return NULL;
+
+	return &rtbl->symtab[idx];
+}
+
+/**
+ * nfp_rtsym_lookup() - Return the RTSYM descriptor for a symbol name
+ * @rtbl:	NFP RTsym table
+ * @name:	Symbol name
+ *
+ * Return: const pointer to a struct nfp_rtsym descriptor, or NULL
+ */
+const struct nfp_rtsym *
+nfp_rtsym_lookup(struct nfp_rtsym_table *rtbl, const char *name)
+{
+	int n;
+
+	if (!rtbl)
+		return NULL;
+
+	for (n = 0; n < rtbl->num; n++)
+		if (strcmp(name, rtbl->symtab[n].name) == 0)
+			return &rtbl->symtab[n];
+
+	return NULL;
+}
+
+u64 nfp_rtsym_size(const struct nfp_rtsym *sym)
+{
+	switch (sym->type) {
+	case NFP_RTSYM_TYPE_NONE:
+		pr_err("rtsym '%s': type NONE\n", sym->name);
+		return 0;
+	default:
+		pr_warn("rtsym '%s': unknown type: %d\n", sym->name, sym->type);
+		fallthrough;
+	case NFP_RTSYM_TYPE_OBJECT:
+	case NFP_RTSYM_TYPE_FUNCTION:
+		return sym->size;
+	case NFP_RTSYM_TYPE_ABS:
+		return sizeof(u64);
+	}
+}
+
+static int
+nfp_rtsym_to_dest(struct nfp_cpp *cpp, const struct nfp_rtsym *sym,
+		  u8 action, u8 token, u64 off, u32 *cpp_id, u64 *addr)
+{
+	if (sym->type != NFP_RTSYM_TYPE_OBJECT) {
+		nfp_err(cpp, "rtsym '%s': direct access to non-object rtsym\n",
+			sym->name);
+		return -EINVAL;
+	}
+
+	*addr = sym->addr + off;
+
+	if (sym->target == NFP_RTSYM_TARGET_EMU_CACHE) {
+		int locality_off = nfp_cpp_mu_locality_lsb(cpp);
+
+		*addr &= ~(NFP_MU_ADDR_ACCESS_TYPE_MASK << locality_off);
+		*addr |= NFP_MU_ADDR_ACCESS_TYPE_DIRECT << locality_off;
+
+		*cpp_id = NFP_CPP_ISLAND_ID(NFP_CPP_TARGET_MU, action, token,
+					    sym->domain);
+	} else if (sym->target < 0) {
+		nfp_err(cpp, "rtsym '%s': unhandled target encoding: %d\n",
+			sym->name, sym->target);
+		return -EINVAL;
+	} else {
+		*cpp_id = NFP_CPP_ISLAND_ID(sym->target, action, token,
+					    sym->domain);
+	}
+
+	return 0;
+}
+
+int __nfp_rtsym_read(struct nfp_cpp *cpp, const struct nfp_rtsym *sym,
+		     u8 action, u8 token, u64 off, void *buf, size_t len)
+{
+	u64 sym_size = nfp_rtsym_size(sym);
+	u32 cpp_id;
+	u64 addr;
+	int err;
+
+	if (off > sym_size) {
+		nfp_err(cpp, "rtsym '%s': read out of bounds: off: %lld + len: %zd > size: %lld\n",
+			sym->name, off, len, sym_size);
+		return -ENXIO;
+	}
+	len = min_t(size_t, len, sym_size - off);
+
+	if (sym->type == NFP_RTSYM_TYPE_ABS) {
+		u8 tmp[8];
+
+		put_unaligned_le64(sym->addr, tmp);
+		memcpy(buf, &tmp[off], len);
+
+		return len;
+	}
+
+	err = nfp_rtsym_to_dest(cpp, sym, action, token, off, &cpp_id, &addr);
+	if (err)
+		return err;
+
+	return nfp_cpp_read(cpp, cpp_id, addr, buf, len);
+}
+
+int nfp_rtsym_read(struct nfp_cpp *cpp, const struct nfp_rtsym *sym, u64 off,
+		   void *buf, size_t len)
+{
+	return __nfp_rtsym_read(cpp, sym, NFP_CPP_ACTION_RW, 0, off, buf, len);
+}
+
+int __nfp_rtsym_readl(struct nfp_cpp *cpp, const struct nfp_rtsym *sym,
+		      u8 action, u8 token, u64 off, u32 *value)
+{
+	u32 cpp_id;
+	u64 addr;
+	int err;
+
+	if (off + 4 > nfp_rtsym_size(sym)) {
+		nfp_err(cpp, "rtsym '%s': readl out of bounds: off: %lld + 4 > size: %lld\n",
+			sym->name, off, nfp_rtsym_size(sym));
+		return -ENXIO;
+	}
+
+	err = nfp_rtsym_to_dest(cpp, sym, action, token, off, &cpp_id, &addr);
+	if (err)
+		return err;
+
+	return nfp_cpp_readl(cpp, cpp_id, addr, value);
+}
+
+int nfp_rtsym_readl(struct nfp_cpp *cpp, const struct nfp_rtsym *sym, u64 off,
+		    u32 *value)
+{
+	return __nfp_rtsym_readl(cpp, sym, NFP_CPP_ACTION_RW, 0, off, value);
+}
+
+int __nfp_rtsym_readq(struct nfp_cpp *cpp, const struct nfp_rtsym *sym,
+		      u8 action, u8 token, u64 off, u64 *value)
+{
+	u32 cpp_id;
+	u64 addr;
+	int err;
+
+	if (off + 8 > nfp_rtsym_size(sym)) {
+		nfp_err(cpp, "rtsym '%s': readq out of bounds: off: %lld + 8 > size: %lld\n",
+			sym->name, off, nfp_rtsym_size(sym));
+		return -ENXIO;
+	}
+
+	if (sym->type == NFP_RTSYM_TYPE_ABS) {
+		*value = sym->addr;
+		return 0;
+	}
+
+	err = nfp_rtsym_to_dest(cpp, sym, action, token, off, &cpp_id, &addr);
+	if (err)
+		return err;
+
+	return nfp_cpp_readq(cpp, cpp_id, addr, value);
+}
+
+int nfp_rtsym_readq(struct nfp_cpp *cpp, const struct nfp_rtsym *sym, u64 off,
+		    u64 *value)
+{
+	return __nfp_rtsym_readq(cpp, sym, NFP_CPP_ACTION_RW, 0, off, value);
+}
+
+int __nfp_rtsym_write(struct nfp_cpp *cpp, const struct nfp_rtsym *sym,
+		      u8 action, u8 token, u64 off, void *buf, size_t len)
+{
+	u64 sym_size = nfp_rtsym_size(sym);
+	u32 cpp_id;
+	u64 addr;
+	int err;
+
+	if (off > sym_size) {
+		nfp_err(cpp, "rtsym '%s': write out of bounds: off: %lld + len: %zd > size: %lld\n",
+			sym->name, off, len, sym_size);
+		return -ENXIO;
+	}
+	len = min_t(size_t, len, sym_size - off);
+
+	err = nfp_rtsym_to_dest(cpp, sym, action, token, off, &cpp_id, &addr);
+	if (err)
+		return err;
+
+	return nfp_cpp_write(cpp, cpp_id, addr, buf, len);
+}
+
+int nfp_rtsym_write(struct nfp_cpp *cpp, const struct nfp_rtsym *sym, u64 off,
+		    void *buf, size_t len)
+{
+	return __nfp_rtsym_write(cpp, sym, NFP_CPP_ACTION_RW, 0, off, buf, len);
+}
+
+int __nfp_rtsym_writel(struct nfp_cpp *cpp, const struct nfp_rtsym *sym,
+		       u8 action, u8 token, u64 off, u32 value)
+{
+	u32 cpp_id;
+	u64 addr;
+	int err;
+
+	if (off + 4 > nfp_rtsym_size(sym)) {
+		nfp_err(cpp, "rtsym '%s': writel out of bounds: off: %lld + 4 > size: %lld\n",
+			sym->name, off, nfp_rtsym_size(sym));
+		return -ENXIO;
+	}
+
+	err = nfp_rtsym_to_dest(cpp, sym, action, token, off, &cpp_id, &addr);
+	if (err)
+		return err;
+
+	return nfp_cpp_writel(cpp, cpp_id, addr, value);
+}
+
+int nfp_rtsym_writel(struct nfp_cpp *cpp, const struct nfp_rtsym *sym, u64 off,
+		     u32 value)
+{
+	return __nfp_rtsym_writel(cpp, sym, NFP_CPP_ACTION_RW, 0, off, value);
+}
+
+int __nfp_rtsym_writeq(struct nfp_cpp *cpp, const struct nfp_rtsym *sym,
+		       u8 action, u8 token, u64 off, u64 value)
+{
+	u32 cpp_id;
+	u64 addr;
+	int err;
+
+	if (off + 8 > nfp_rtsym_size(sym)) {
+		nfp_err(cpp, "rtsym '%s': writeq out of bounds: off: %lld + 8 > size: %lld\n",
+			sym->name, off, nfp_rtsym_size(sym));
+		return -ENXIO;
+	}
+
+	err = nfp_rtsym_to_dest(cpp, sym, action, token, off, &cpp_id, &addr);
+	if (err)
+		return err;
+
+	return nfp_cpp_writeq(cpp, cpp_id, addr, value);
+}
+
+int nfp_rtsym_writeq(struct nfp_cpp *cpp, const struct nfp_rtsym *sym, u64 off,
+		     u64 value)
+{
+	return __nfp_rtsym_writeq(cpp, sym, NFP_CPP_ACTION_RW, 0, off, value);
+}
+
+/**
+ * nfp_rtsym_read_le() - Read a simple unsigned scalar value from symbol
+ * @rtbl:	NFP RTsym table
+ * @name:	Symbol name
+ * @error:	Poniter to error code (optional)
+ *
+ * Lookup a symbol, map, read it and return it's value. Value of the symbol
+ * will be interpreted as a simple little-endian unsigned value. Symbol can
+ * be 4 or 8 bytes in size.
+ *
+ * Return: value read, on error sets the error and returns ~0ULL.
+ */
+u64 nfp_rtsym_read_le(struct nfp_rtsym_table *rtbl, const char *name,
+		      int *error)
+{
+	const struct nfp_rtsym *sym;
+	u32 val32;
+	u64 val;
+	int err;
+
+	sym = nfp_rtsym_lookup(rtbl, name);
+	if (!sym) {
+		err = -ENOENT;
+		goto exit;
+	}
+
+	switch (nfp_rtsym_size(sym)) {
+	case 4:
+		err = nfp_rtsym_readl(rtbl->cpp, sym, 0, &val32);
+		val = val32;
+		break;
+	case 8:
+		err = nfp_rtsym_readq(rtbl->cpp, sym, 0, &val);
+		break;
+	default:
+		nfp_err(rtbl->cpp,
+			"rtsym '%s': unsupported or non-scalar size: %lld\n",
+			name, nfp_rtsym_size(sym));
+		err = -EINVAL;
+		break;
+	}
+
+exit:
+	if (error)
+		*error = err;
+
+	if (err)
+		return ~0ULL;
+	return val;
+}
+
+/**
+ * nfp_rtsym_write_le() - Write an unsigned scalar value to a symbol
+ * @rtbl:	NFP RTsym table
+ * @name:	Symbol name
+ * @value:	Value to write
+ *
+ * Lookup a symbol and write a value to it. Symbol can be 4 or 8 bytes in size.
+ * If 4 bytes then the lower 32-bits of 'value' are used. Value will be
+ * written as simple little-endian unsigned value.
+ *
+ * Return: 0 on success or error code.
+ */
+int nfp_rtsym_write_le(struct nfp_rtsym_table *rtbl, const char *name,
+		       u64 value)
+{
+	const struct nfp_rtsym *sym;
+	int err;
+
+	sym = nfp_rtsym_lookup(rtbl, name);
+	if (!sym)
+		return -ENOENT;
+
+	switch (nfp_rtsym_size(sym)) {
+	case 4:
+		err = nfp_rtsym_writel(rtbl->cpp, sym, 0, value);
+		break;
+	case 8:
+		err = nfp_rtsym_writeq(rtbl->cpp, sym, 0, value);
+		break;
+	default:
+		nfp_err(rtbl->cpp,
+			"rtsym '%s': unsupported or non-scalar size: %lld\n",
+			name, nfp_rtsym_size(sym));
+		err = -EINVAL;
+		break;
+	}
+
+	return err;
+}
+
+u8 __iomem *
+nfp_rtsym_map(struct nfp_rtsym_table *rtbl, const char *name, const char *id,
+	      unsigned int min_size, struct nfp_cpp_area **area)
+{
+	const struct nfp_rtsym *sym;
+	u8 __iomem *mem;
+	u32 cpp_id;
+	u64 addr;
+	int err;
+
+	sym = nfp_rtsym_lookup(rtbl, name);
+	if (!sym)
+		return (u8 __iomem *)ERR_PTR(-ENOENT);
+
+	err = nfp_rtsym_to_dest(rtbl->cpp, sym, NFP_CPP_ACTION_RW, 0, 0,
+				&cpp_id, &addr);
+	if (err) {
+		nfp_err(rtbl->cpp, "rtsym '%s': mapping failed\n", name);
+		return (u8 __iomem *)ERR_PTR(err);
+	}
+
+	if (sym->size < min_size) {
+		nfp_err(rtbl->cpp, "rtsym '%s': too small\n", name);
+		return (u8 __iomem *)ERR_PTR(-EINVAL);
+	}
+
+	mem = nfp_cpp_map_area(rtbl->cpp, id, cpp_id, addr, sym->size, area);
+	if (IS_ERR(mem)) {
+		nfp_err(rtbl->cpp, "rtysm '%s': failed to map: %ld\n",
+			name, PTR_ERR(mem));
+		return mem;
+	}
+
+	return mem;
+}