From: Calvin Zhang <calvinzhang.cool@gmail.com>
To: Vineet Gupta <vgupta@kernel.org>,
Russell King <linux@armlinux.org.uk>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Guo Ren <guoren@kernel.org>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Nick Hu <nickhu@andestech.com>, Greentime Hu <green.hu@gmail.com>,
Vincent Chen <deanbo422@gmail.com>,
Dinh Nguyen <dinguyen@kernel.org>,
Jonas Bonn <jonas@southpole.se>,
Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>,
Stafford Horne <shorne@gmail.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>, Rich Felker <dalias@libc.org>,
Chris Zankel <chris@zankel.net>,
Max Filippov <jcmvbkbc@gmail.com>,
Rob Herring <robh+dt@kernel.org>,
Frank Rowand <frowand.list@gmail.com>,
Mike Rapoport <rppt@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@redhat.com>,
Kefeng Wang <wangkefeng.wang@huawei.com>,
Vladimir Isaev <isaev@synopsys.com>,
Calvin Zhang <calvinzhang.cool@gmail.com>,
Arnd Bergmann <arnd@arndb.de>,
"Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>,
Wolfram Sang <wsa+renesas@sang-engineering.com>,
Guenter Roeck <linux@roeck-us.net>, Marc Zyngier <maz@kernel.org>,
David Brazdil <dbrazdil@google.com>,
Mark Rutland <mark.rutland@arm.com>,
Andrey Konovalov <andreyknvl@gmail.com>,
Anshuman Khandual <anshuman.khandual@arm.com>,
Souptick Joarder <jrdr.linux@gmail.com>,
Jinyang He <hejinyang@loongson.cn>,
Alexander Sverdlin <alexander.sverdlin@nokia.com>,
Serge Semin <Sergey.Semin@baikalelectronics.ru>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Ley Foon Tan <ley.foon.tan@intel.com>,
Andreas Oetken <andreas.oetken@siemens.com>,
Randy Dunlap <rdunlap@infradead.org>,
Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
Christophe Leroy <christophe.leroy@c-s.fr>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Zhang Yunkai <zhang.yunkai@zte.com.cn>,
Markus Elfring <elfring@users.sourceforge.net>,
Ganesh Goudar <ganeshgr@linux.ibm.com>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
Atish Patra <atish.patra@wdc.com>,
Anup Patel <anup.patel@wdc.com>,
Nick Kossifidis <mick@ics.forth.gr>,
Alexandre Ghiti <alex@ghiti.fr>,
Vitaly Wool <vitaly.wool@konsulko.com>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Guo Ren <guoren@linux.alibaba.com>, Rob Herring <robh@kernel.org>,
Tiezhu Yang <yangtiezhu@loongson.cn>,
Mauri Sandberg <sandberg@mailfence.com>,
Palmer Dabbelt <palmerdabbelt@google.com>,
linux-snps-arc@lists.infradead.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org,
uclinux-h8-devel@lists.sourceforge.jp,
linux-mips@vger.kernel.org, openrisc@lists.librecores.org,
linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org,
linux-sh@vger.kernel.org, linux-xtensa@linux-xtensa.org,
devicetree@vger.kernel.org
Subject: [PATCH 1/2] of: Sort reserved_mem related code
Date: Fri, 19 Nov 2021 15:58:18 +0800 [thread overview]
Message-ID: <20211119075844.2902592-2-calvinzhang.cool@gmail.com> (raw)
In-Reply-To: <20211119075844.2902592-1-calvinzhang.cool@gmail.com>
Move code about parsing /reserved-memory and initializing of
reserved_mems array to of_reserved_mem.c for better modularity.
Rename array name from reserved_mem to reserved_mems to distinguish
from type definition.
Signed-off-by: Calvin Zhang <calvinzhang.cool@gmail.com>
---
drivers/of/fdt.c | 108 +--------------------
drivers/of/of_private.h | 12 ++-
drivers/of/of_reserved_mem.c | 163 ++++++++++++++++++++++++++------
include/linux/of_reserved_mem.h | 4 +
4 files changed, 149 insertions(+), 138 deletions(-)
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index bdca35284ceb..445af4e69300 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -80,7 +80,7 @@ void __init of_fdt_limit_memory(int limit)
}
}
-static bool of_fdt_device_is_available(const void *blob, unsigned long node)
+bool of_fdt_device_is_available(const void *blob, unsigned long node)
{
const char *status = fdt_getprop(blob, node, "status", NULL);
@@ -476,7 +476,7 @@ void *initial_boot_params __ro_after_init;
static u32 of_fdt_crc32;
-static int __init early_init_dt_reserve_memory_arch(phys_addr_t base,
+int __init early_init_dt_reserve_memory_arch(phys_addr_t base,
phys_addr_t size, bool nomap)
{
if (nomap) {
@@ -492,108 +492,6 @@ static int __init early_init_dt_reserve_memory_arch(phys_addr_t base,
return memblock_reserve(base, size);
}
-/*
- * __reserved_mem_reserve_reg() - reserve all memory described in 'reg' property
- */
-static int __init __reserved_mem_reserve_reg(unsigned long node,
- const char *uname)
-{
- int t_len = (dt_root_addr_cells + dt_root_size_cells) * sizeof(__be32);
- phys_addr_t base, size;
- int len;
- const __be32 *prop;
- int first = 1;
- bool nomap;
-
- prop = of_get_flat_dt_prop(node, "reg", &len);
- if (!prop)
- return -ENOENT;
-
- if (len && len % t_len != 0) {
- pr_err("Reserved memory: invalid reg property in '%s', skipping node.\n",
- uname);
- return -EINVAL;
- }
-
- nomap = of_get_flat_dt_prop(node, "no-map", NULL) != NULL;
-
- while (len >= t_len) {
- base = dt_mem_next_cell(dt_root_addr_cells, &prop);
- size = dt_mem_next_cell(dt_root_size_cells, &prop);
-
- if (size &&
- early_init_dt_reserve_memory_arch(base, size, nomap) == 0)
- pr_debug("Reserved memory: reserved region for node '%s': base %pa, size %lu MiB\n",
- uname, &base, (unsigned long)(size / SZ_1M));
- else
- pr_info("Reserved memory: failed to reserve memory for node '%s': base %pa, size %lu MiB\n",
- uname, &base, (unsigned long)(size / SZ_1M));
-
- len -= t_len;
- if (first) {
- fdt_reserved_mem_save_node(node, uname, base, size);
- first = 0;
- }
- }
- return 0;
-}
-
-/*
- * __reserved_mem_check_root() - check if #size-cells, #address-cells provided
- * in /reserved-memory matches the values supported by the current implementation,
- * also check if ranges property has been provided
- */
-static int __init __reserved_mem_check_root(unsigned long node)
-{
- const __be32 *prop;
-
- prop = of_get_flat_dt_prop(node, "#size-cells", NULL);
- if (!prop || be32_to_cpup(prop) != dt_root_size_cells)
- return -EINVAL;
-
- prop = of_get_flat_dt_prop(node, "#address-cells", NULL);
- if (!prop || be32_to_cpup(prop) != dt_root_addr_cells)
- return -EINVAL;
-
- prop = of_get_flat_dt_prop(node, "ranges", NULL);
- if (!prop)
- return -EINVAL;
- return 0;
-}
-
-/*
- * fdt_scan_reserved_mem() - scan a single FDT node for reserved memory
- */
-static int __init fdt_scan_reserved_mem(void)
-{
- int node, child;
- const void *fdt = initial_boot_params;
-
- node = fdt_path_offset(fdt, "/reserved-memory");
- if (node < 0)
- return -ENODEV;
-
- if (__reserved_mem_check_root(node) != 0) {
- pr_err("Reserved memory: unsupported node format, ignoring\n");
- return -EINVAL;
- }
-
- fdt_for_each_subnode(child, fdt, node) {
- const char *uname;
- int err;
-
- if (!of_fdt_device_is_available(fdt, child))
- continue;
-
- uname = fdt_get_name(fdt, child, NULL);
-
- err = __reserved_mem_reserve_reg(child, uname);
- if (err == -ENOENT && of_get_flat_dt_prop(child, "size", NULL))
- fdt_reserved_mem_save_node(child, uname, 0, 0);
- }
- return 0;
-}
-
/*
* fdt_reserve_elfcorehdr() - reserves memory for elf core header
*
@@ -642,7 +540,7 @@ void __init early_init_fdt_scan_reserved_mem(void)
}
fdt_scan_reserved_mem();
- fdt_init_reserved_mem();
+ of_reserved_mem_init();
fdt_reserve_elfcorehdr();
}
diff --git a/drivers/of/of_private.h b/drivers/of/of_private.h
index 9324483397f6..88b67f8ed698 100644
--- a/drivers/of/of_private.h
+++ b/drivers/of/of_private.h
@@ -163,8 +163,14 @@ static inline int of_dma_get_range(struct device_node *np,
}
#endif
-void fdt_init_reserved_mem(void);
-void fdt_reserved_mem_save_node(unsigned long node, const char *uname,
- phys_addr_t base, phys_addr_t size);
+bool of_fdt_device_is_available(const void *blob, unsigned long node);
+int early_init_dt_reserve_memory_arch(phys_addr_t base,
+ phys_addr_t size, bool nomap);
+#ifdef CONFIG_OF_RESERVED_MEM
+int fdt_scan_reserved_mem(void);
+#else
+static inline int fdt_scan_reserved_mem(void) { }
+#endif
+
#endif /* _LINUX_OF_PRIVATE_H */
diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
index 9c0fb962c22b..784cfc5cd251 100644
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -20,13 +20,14 @@
#include <linux/of_reserved_mem.h>
#include <linux/sort.h>
#include <linux/slab.h>
+#include <linux/libfdt.h>
#include <linux/memblock.h>
#include <linux/kmemleak.h>
#include "of_private.h"
#define MAX_RESERVED_REGIONS 64
-static struct reserved_mem reserved_mem[MAX_RESERVED_REGIONS];
+static struct reserved_mem reserved_mems[MAX_RESERVED_REGIONS];
static int reserved_mem_count;
static int __init early_init_dt_alloc_reserved_memory_arch(phys_addr_t size,
@@ -56,12 +57,12 @@ static int __init early_init_dt_alloc_reserved_memory_arch(phys_addr_t size,
/*
* fdt_reserved_mem_save_node() - save fdt node for second pass initialization
*/
-void __init fdt_reserved_mem_save_node(unsigned long node, const char *uname,
+static void __init fdt_reserved_mem_save_node(unsigned long node, const char *uname,
phys_addr_t base, phys_addr_t size)
{
- struct reserved_mem *rmem = &reserved_mem[reserved_mem_count];
+ struct reserved_mem *rmem = &reserved_mems[reserved_mem_count];
- if (reserved_mem_count == ARRAY_SIZE(reserved_mem)) {
+ if (reserved_mem_count == ARRAY_SIZE(reserved_mems)) {
pr_err("not enough space for all defined regions.\n");
return;
}
@@ -173,29 +174,105 @@ static const struct of_device_id __rmem_of_table_sentinel
__used __section("__reservedmem_of_table_end");
/*
- * __reserved_mem_init_node() - call region specific reserved memory init code
+ * __reserved_mem_check_root() - check if #size-cells, #address-cells provided
+ * in /reserved-memory matches the values supported by the current implementation,
+ * also check if ranges property has been provided
*/
-static int __init __reserved_mem_init_node(struct reserved_mem *rmem)
+static int __init __reserved_mem_check_root(unsigned long node)
{
- extern const struct of_device_id __reservedmem_of_table[];
- const struct of_device_id *i;
- int ret = -ENOENT;
+ const __be32 *prop;
- for (i = __reservedmem_of_table; i < &__rmem_of_table_sentinel; i++) {
- reservedmem_of_init_fn initfn = i->data;
- const char *compat = i->compatible;
+ prop = of_get_flat_dt_prop(node, "#size-cells", NULL);
+ if (!prop || be32_to_cpup(prop) != dt_root_size_cells)
+ return -EINVAL;
- if (!of_flat_dt_is_compatible(rmem->fdt_node, compat))
- continue;
+ prop = of_get_flat_dt_prop(node, "#address-cells", NULL);
+ if (!prop || be32_to_cpup(prop) != dt_root_addr_cells)
+ return -EINVAL;
- ret = initfn(rmem);
- if (ret == 0) {
- pr_info("initialized node %s, compatible id %s\n",
- rmem->name, compat);
- break;
+ prop = of_get_flat_dt_prop(node, "ranges", NULL);
+ if (!prop)
+ return -EINVAL;
+ return 0;
+}
+
+/*
+ * __reserved_mem_reserve_reg() - reserve all memory described in 'reg' property
+ */
+static int __init __reserved_mem_reserve_reg(unsigned long node,
+ const char *uname)
+{
+ int t_len = (dt_root_addr_cells + dt_root_size_cells) * sizeof(__be32);
+ phys_addr_t base, size;
+ int len;
+ const __be32 *prop;
+ int first = 1;
+ bool nomap;
+
+ prop = of_get_flat_dt_prop(node, "reg", &len);
+ if (!prop)
+ return -ENOENT;
+
+ if (len && len % t_len != 0) {
+ pr_err("Reserved memory: invalid reg property in '%s', skipping node.\n",
+ uname);
+ return -EINVAL;
+ }
+
+ nomap = of_get_flat_dt_prop(node, "no-map", NULL) != NULL;
+
+ while (len >= t_len) {
+ base = dt_mem_next_cell(dt_root_addr_cells, &prop);
+ size = dt_mem_next_cell(dt_root_size_cells, &prop);
+
+ if (size &&
+ early_init_dt_reserve_memory_arch(base, size, nomap) == 0)
+ pr_debug("Reserved memory: reserved region for node '%s': base %pa, size %lu MiB\n",
+ uname, &base, (unsigned long)(size / SZ_1M));
+ else
+ pr_info("Reserved memory: failed to reserve memory for node '%s': base %pa, size %lu MiB\n",
+ uname, &base, (unsigned long)(size / SZ_1M));
+
+ len -= t_len;
+ if (first) {
+ fdt_reserved_mem_save_node(node, uname, base, size);
+ first = 0;
}
}
- return ret;
+ return 0;
+}
+
+/*
+ * fdt_scan_reserved_mem() - scan a single FDT node for reserved memory
+ */
+int __init fdt_scan_reserved_mem(void)
+{
+ int node, child;
+ const void *fdt = initial_boot_params;
+
+ node = fdt_path_offset(fdt, "/reserved-memory");
+ if (node < 0)
+ return -ENODEV;
+
+ if (__reserved_mem_check_root(node) != 0) {
+ pr_err("Reserved memory: unsupported node format, ignoring\n");
+ return -EINVAL;
+ }
+
+ fdt_for_each_subnode(child, fdt, node) {
+ const char *uname;
+ int err;
+
+ if (!of_fdt_device_is_available(fdt, child))
+ continue;
+
+ uname = fdt_get_name(fdt, child, NULL);
+
+ err = __reserved_mem_reserve_reg(child, uname);
+ if (err == -ENOENT && of_get_flat_dt_prop(child, "size", NULL))
+ fdt_reserved_mem_save_node(child, uname, 0, 0);
+ }
+ return 0;
}
static int __init __rmem_cmp(const void *a, const void *b)
@@ -228,13 +305,13 @@ static void __init __rmem_check_for_overlap(void)
if (reserved_mem_count < 2)
return;
- sort(reserved_mem, reserved_mem_count, sizeof(reserved_mem[0]),
+ sort(reserved_mems, reserved_mem_count, sizeof(reserved_mems[0]),
__rmem_cmp, NULL);
for (i = 0; i < reserved_mem_count - 1; i++) {
struct reserved_mem *this, *next;
- this = &reserved_mem[i];
- next = &reserved_mem[i + 1];
+ this = &reserved_mems[i];
+ next = &reserved_mems[i + 1];
if (this->base + this->size > next->base) {
phys_addr_t this_end, next_end;
@@ -248,10 +325,36 @@ static void __init __rmem_check_for_overlap(void)
}
}
+/*
+ * __reserved_mem_init_node() - call region specific reserved memory init code
+ */
+static int __init __reserved_mem_init_node(struct reserved_mem *rmem)
+{
+ extern const struct of_device_id __reservedmem_of_table[];
+ const struct of_device_id *i;
+ int ret = -ENOENT;
+
+ for (i = __reservedmem_of_table; i < &__rmem_of_table_sentinel; i++) {
+ reservedmem_of_init_fn initfn = i->data;
+ const char *compat = i->compatible;
+
+ if (!of_flat_dt_is_compatible(rmem->fdt_node, compat))
+ continue;
+
+ ret = initfn(rmem);
+ if (ret == 0) {
+ pr_info("initialized node %s, compatible id %s\n",
+ rmem->name, compat);
+ break;
+ }
+ }
+ return ret;
+}
+
/**
- * fdt_init_reserved_mem() - allocate and init all saved reserved memory regions
+ * of_reserved_mem_init() - allocate and init all saved reserved memory regions
*/
-void __init fdt_init_reserved_mem(void)
+void __init of_reserved_mem_init(void)
{
int i;
@@ -259,7 +362,7 @@ void __init fdt_init_reserved_mem(void)
__rmem_check_for_overlap();
for (i = 0; i < reserved_mem_count; i++) {
- struct reserved_mem *rmem = &reserved_mem[i];
+ struct reserved_mem *rmem = &reserved_mems[i];
unsigned long node = rmem->fdt_node;
int len;
const __be32 *prop;
@@ -299,8 +402,8 @@ static inline struct reserved_mem *__find_rmem(struct device_node *node)
return NULL;
for (i = 0; i < reserved_mem_count; i++)
- if (reserved_mem[i].phandle == node->phandle)
- return &reserved_mem[i];
+ if (reserved_mems[i].phandle == node->phandle)
+ return &reserved_mems[i];
return NULL;
}
@@ -442,8 +545,8 @@ struct reserved_mem *of_reserved_mem_lookup(struct device_node *np)
name = kbasename(np->full_name);
for (i = 0; i < reserved_mem_count; i++)
- if (!strcmp(reserved_mem[i].name, name))
- return &reserved_mem[i];
+ if (!strcmp(reserved_mems[i].name, name))
+ return &reserved_mems[i];
return NULL;
}
diff --git a/include/linux/of_reserved_mem.h b/include/linux/of_reserved_mem.h
index 4de2a24cadc9..34e134bec606 100644
--- a/include/linux/of_reserved_mem.h
+++ b/include/linux/of_reserved_mem.h
@@ -32,6 +32,8 @@ typedef int (*reservedmem_of_init_fn)(struct reserved_mem *rmem);
#define RESERVEDMEM_OF_DECLARE(name, compat, init) \
_OF_DECLARE(reservedmem, name, compat, init, reservedmem_of_init_fn)
+void of_reserved_mem_init(void);
+
int of_reserved_mem_device_init_by_idx(struct device *dev,
struct device_node *np, int idx);
int of_reserved_mem_device_init_by_name(struct device *dev,
@@ -45,6 +47,8 @@ struct reserved_mem *of_reserved_mem_lookup(struct device_node *np);
#define RESERVEDMEM_OF_DECLARE(name, compat, init) \
_OF_DECLARE_STUB(reservedmem, name, compat, init, reservedmem_of_init_fn)
+static inline void of_reserved_mem_init(void) { }
+
static inline int of_reserved_mem_device_init_by_idx(struct device *dev,
struct device_node *np, int idx)
{
--
2.30.2
next prev parent reply other threads:[~2021-11-19 8:01 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-19 7:58 [PATCH 0/2] of: remove reserved regions count restriction Calvin Zhang
2021-11-19 7:58 ` Calvin Zhang [this message]
2021-11-30 0:01 ` [PATCH 1/2] of: Sort reserved_mem related code Rob Herring
2021-11-19 7:58 ` [PATCH 2/2] of: reserved_mem: Remove reserved regions count restriction Calvin Zhang
2021-11-19 9:56 ` Andy Shevchenko
2021-11-19 10:30 ` Calvin Zhang
2021-11-21 6:43 ` [PATCH 0/2] of: remove " Mike Rapoport
2021-11-21 9:01 ` Calvin Zhang
2021-11-30 0:08 ` Rob Herring
2021-11-30 21:07 ` Mike Rapoport
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