Adding AST2400 and AST2600 edac driver support.
Signed-off-by: Troy Lee <[email protected]>
---
Change since v1:
1. Removing SoC specific code
2. Changing numerical representation of memory sizing
---
drivers/edac/Kconfig | 6 +--
drivers/edac/aspeed_edac.c | 103 +++++++++++++++++++++++++++++--------
2 files changed, 85 insertions(+), 24 deletions(-)
diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
index fc30f2ef9782..8ea70746d0bf 100644
--- a/drivers/edac/Kconfig
+++ b/drivers/edac/Kconfig
@@ -508,10 +508,10 @@ config EDAC_QCOM
health, you should probably say 'Y' here.
config EDAC_ASPEED
- tristate "Aspeed AST 2500 SoC"
- depends on MACH_ASPEED_G5
+ tristate "Aspeed AST BMC SoC"
+ depends on (MACH_ASPEED_G4 || MACH_ASPEED_G5 || MACH_ASPEED_G6)
help
- Support for error detection and correction on the Aspeed AST 2500 SoC.
+ Support for error detection and correction on the Aspeed AST BMC SoC.
First, ECC must be configured in the bootloader. Then, this driver
will expose error counters via the EDAC kernel framework.
diff --git a/drivers/edac/aspeed_edac.c b/drivers/edac/aspeed_edac.c
index fbec28dc661d..b8c8d6a05f91 100644
--- a/drivers/edac/aspeed_edac.c
+++ b/drivers/edac/aspeed_edac.c
@@ -14,12 +14,11 @@
#include <linux/regmap.h>
#include "edac_module.h"
-
#define DRV_NAME "aspeed-edac"
-
#define ASPEED_MCR_PROT 0x00 /* protection key register */
#define ASPEED_MCR_CONF 0x04 /* configuration register */
+#define ASPEED_MCR_REQ 0x08 /* Graphics Memory Protection register */
#define ASPEED_MCR_INTR_CTRL 0x50 /* interrupt control/status register */
#define ASPEED_MCR_ADDR_UNREC 0x58 /* address of first un-recoverable error */
#define ASPEED_MCR_ADDR_REC 0x5c /* address of last recoverable error */
@@ -29,15 +28,17 @@
#define ASPEED_MCR_PROT_PASSWD 0xfc600309
#define ASPEED_MCR_CONF_DRAM_TYPE BIT(4)
#define ASPEED_MCR_CONF_ECC BIT(7)
+#define ASPEED_MCR_CONF_DRAM_CTRL_TYPE (BIT(28)|BIT(29)|BIT(30)|BIT(31))
#define ASPEED_MCR_INTR_CTRL_CLEAR BIT(31)
#define ASPEED_MCR_INTR_CTRL_CNT_REC GENMASK(23, 16)
#define ASPEED_MCR_INTR_CTRL_CNT_UNREC GENMASK(15, 12)
#define ASPEED_MCR_INTR_CTRL_ENABLE (BIT(0) | BIT(1))
+#define ASPEED_MCR_CONF_DRAM_CTRL_TYPE_AST2500 0x01
+#define ASPEED_MCR_CONF_DRAM_CTRL_TYPE_AST2600 0x03
static struct regmap *aspeed_regmap;
-
static int regmap_reg_write(void *context, unsigned int reg, unsigned int val)
{
void __iomem *regs = (void __iomem *)context;
@@ -53,7 +54,6 @@ static int regmap_reg_write(void *context, unsigned int reg, unsigned int val)
return 0;
}
-
static int regmap_reg_read(void *context, unsigned int reg, unsigned int *val)
{
void __iomem *regs = (void __iomem *)context;
@@ -63,6 +63,79 @@ static int regmap_reg_read(void *context, unsigned int reg, unsigned int *val)
return 0;
}
+extern void aspeed_sdmc_disable_mem_protection(u8 req)
+{
+ u32 req_val = 0;
+
+ regmap_read(aspeed_regmap, ASPEED_MCR_REQ, &req_val);
+
+ req_val &= ~BIT(req);
+
+ regmap_write(aspeed_regmap, ASPEED_MCR_REQ, req_val);
+}
+EXPORT_SYMBOL(aspeed_sdmc_disable_mem_protection);
+
+static const u32 ast2400_dram_table[] = {
+ 64 << 20,
+ 128 << 20,
+ 256 << 20,
+ 512 << 20,
+};
+
+static const u32 ast2500_dram_table[] = {
+ 128 << 20,
+ 256 << 20,
+ 512 << 20,
+ 1024 << 20,
+};
+
+static const u32 ast2600_dram_table[] = {
+ 256 << 20,
+ 512 << 20,
+ 1024 << 20,
+ 2048 << 20,
+};
+
+extern u32 aspeed_get_dram_size(void)
+{
+ u32 reg04;
+ u32 size;
+ u8 type;
+
+ regmap_read(aspeed_regmap, ASPEED_MCR_CONF, ®04);
+
+ type = (reg04 & ASPEED_MCR_CONF_DRAM_CTRL_TYPE) >> 28;
+
+ if (type == ASPEED_MCR_CONF_DRAM_CTRL_TYPE_AST2600)
+ size = ast2600_dram_table[reg04 & 0x3];
+ else if (type == ASPEED_MCR_CONF_DRAM_CTRL_TYPE_AST2500)
+ size = ast2500_dram_table[reg04 & 0x3];
+ else
+ size = ast2400_dram_table[reg04 & 0x3];
+
+ return size;
+}
+EXPORT_SYMBOL(aspeed_get_dram_size);
+
+static const u32 aspeed_vga_table[] = {
+ 8 << 20,
+ 16 << 20,
+ 32 << 20,
+ 64 << 20,
+};
+
+extern u32 aspeed_get_vga_size(void)
+{
+ u32 reg04;
+ u32 size;
+
+ regmap_read(aspeed_regmap, ASPEED_MCR_CONF, ®04);
+
+ size = aspeed_vga_table[((reg04 & 0xC) >> 2)];
+ return size;
+}
+EXPORT_SYMBOL(aspeed_get_vga_size);
+
static bool regmap_is_volatile(struct device *dev, unsigned int reg)
{
switch (reg) {
@@ -227,7 +300,6 @@ static int config_irq(void *ctx, struct platform_device *pdev)
return 0;
}
-
static int init_csrows(struct mem_ctl_info *mci)
{
struct csrow_info *csrow = mci->csrows[0];
@@ -239,7 +311,7 @@ static int init_csrows(struct mem_ctl_info *mci)
int rc;
/* retrieve info about physical memory from device tree */
- np = of_find_node_by_path("/memory");
+ np = of_find_node_by_name(NULL, "memory");
if (!np) {
dev_err(mci->pdev, "dt: missing /memory node\n");
return -ENODEV;
@@ -275,14 +347,12 @@ static int init_csrows(struct mem_ctl_info *mci)
return 0;
}
-
static int aspeed_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct edac_mc_layer layers[2];
struct mem_ctl_info *mci;
void __iomem *regs;
- u32 reg04;
int rc;
regs = devm_platform_ioremap_resource(pdev, 0);
@@ -294,13 +364,6 @@ static int aspeed_probe(struct platform_device *pdev)
if (IS_ERR(aspeed_regmap))
return PTR_ERR(aspeed_regmap);
- /* bail out if ECC mode is not configured */
- regmap_read(aspeed_regmap, ASPEED_MCR_CONF, ®04);
- if (!(reg04 & ASPEED_MCR_CONF_ECC)) {
- dev_err(&pdev->dev, "ECC mode is not configured in u-boot\n");
- return -EPERM;
- }
-
edac_op_state = EDAC_OPSTATE_INT;
/* allocate & init EDAC MC data structure */
@@ -373,12 +436,13 @@ static int aspeed_remove(struct platform_device *pdev)
return 0;
}
-
static const struct of_device_id aspeed_of_match[] = {
+ { .compatible = "aspeed,ast2400-sdram-edac" },
{ .compatible = "aspeed,ast2500-sdram-edac" },
+ { .compatible = "aspeed,ast2600-sdram-edac" },
{},
};
-
+MODULE_DEVICE_TABLE(of, aspeed_of_match);
static struct platform_driver aspeed_driver = {
.driver = {
@@ -395,18 +459,15 @@ static int __init aspeed_init(void)
return platform_driver_register(&aspeed_driver);
}
-
static void __exit aspeed_exit(void)
{
platform_driver_unregister(&aspeed_driver);
}
-
module_init(aspeed_init);
module_exit(aspeed_exit);
-
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Stefan Schaeckeler <[email protected]>");
-MODULE_DESCRIPTION("Aspeed AST2500 EDAC driver");
+MODULE_DESCRIPTION("Aspeed EDAC driver");
MODULE_VERSION("1.0");
--
2.17.1
On Wed, 2 Dec 2020 at 06:37, Troy Lee <[email protected]> wrote:
>
> Adding AST2400 and AST2600 edac driver support.
>
> Signed-off-by: Troy Lee <[email protected]>
> ---
> Change since v1:
> 1. Removing SoC specific code
> 2. Changing numerical representation of memory sizing
> ---
> drivers/edac/Kconfig | 6 +--
> drivers/edac/aspeed_edac.c | 103 +++++++++++++++++++++++++++++--------
> 2 files changed, 85 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
> index fc30f2ef9782..8ea70746d0bf 100644
> --- a/drivers/edac/Kconfig
> +++ b/drivers/edac/Kconfig
> @@ -508,10 +508,10 @@ config EDAC_QCOM
> health, you should probably say 'Y' here.
>
> config EDAC_ASPEED
> - tristate "Aspeed AST 2500 SoC"
> - depends on MACH_ASPEED_G5
> + tristate "Aspeed AST BMC SoC"
> + depends on (MACH_ASPEED_G4 || MACH_ASPEED_G5 || MACH_ASPEED_G6)
Change this to ARCH_ASPEED.
> help
> - Support for error detection and correction on the Aspeed AST 2500 SoC.
> + Support for error detection and correction on the Aspeed AST BMC SoC.
>
> First, ECC must be configured in the bootloader. Then, this driver
> will expose error counters via the EDAC kernel framework.
> diff --git a/drivers/edac/aspeed_edac.c b/drivers/edac/aspeed_edac.c
> index fbec28dc661d..b8c8d6a05f91 100644
> --- a/drivers/edac/aspeed_edac.c
> +++ b/drivers/edac/aspeed_edac.c
> @@ -14,12 +14,11 @@
> #include <linux/regmap.h>
> #include "edac_module.h"
>
> -
These whitespace cleanups are ok, but can probably go in a different
patch so they aren't mixed up with the functional changes.
> #define DRV_NAME "aspeed-edac"
>
> -
> #define ASPEED_MCR_PROT 0x00 /* protection key register */
> #define ASPEED_MCR_CONF 0x04 /* configuration register */
> +#define ASPEED_MCR_REQ 0x08 /* Graphics Memory Protection register */
> #define ASPEED_MCR_INTR_CTRL 0x50 /* interrupt control/status register */
> #define ASPEED_MCR_ADDR_UNREC 0x58 /* address of first un-recoverable error */
> #define ASPEED_MCR_ADDR_REC 0x5c /* address of last recoverable error */
> @@ -29,15 +28,17 @@
> #define ASPEED_MCR_PROT_PASSWD 0xfc600309
> #define ASPEED_MCR_CONF_DRAM_TYPE BIT(4)
> #define ASPEED_MCR_CONF_ECC BIT(7)
> +#define ASPEED_MCR_CONF_DRAM_CTRL_TYPE (BIT(28)|BIT(29)|BIT(30)|BIT(31))
We can use GENMASK here:
GENMASK(31, 28)
> #define ASPEED_MCR_INTR_CTRL_CLEAR BIT(31)
> #define ASPEED_MCR_INTR_CTRL_CNT_REC GENMASK(23, 16)
> #define ASPEED_MCR_INTR_CTRL_CNT_UNREC GENMASK(15, 12)
> #define ASPEED_MCR_INTR_CTRL_ENABLE (BIT(0) | BIT(1))
>
> +#define ASPEED_MCR_CONF_DRAM_CTRL_TYPE_AST2500 0x01
> +#define ASPEED_MCR_CONF_DRAM_CTRL_TYPE_AST2600 0x03
>
> static struct regmap *aspeed_regmap;
>
> -
> static int regmap_reg_write(void *context, unsigned int reg, unsigned int val)
> {
> void __iomem *regs = (void __iomem *)context;
> @@ -53,7 +54,6 @@ static int regmap_reg_write(void *context, unsigned int reg, unsigned int val)
> return 0;
> }
>
> -
> static int regmap_reg_read(void *context, unsigned int reg, unsigned int *val)
> {
> void __iomem *regs = (void __iomem *)context;
> @@ -63,6 +63,79 @@ static int regmap_reg_read(void *context, unsigned int reg, unsigned int *val)
> return 0;
> }
>
> +extern void aspeed_sdmc_disable_mem_protection(u8 req)
> +{
> + u32 req_val = 0;
> +
> + regmap_read(aspeed_regmap, ASPEED_MCR_REQ, &req_val);
> +
> + req_val &= ~BIT(req);
> +
> + regmap_write(aspeed_regmap, ASPEED_MCR_REQ, req_val);
This is open coding regmap_update_bits:
regmap_update_bits(aspeed_regmap, ASPEED_MCR_REQ, BIT(req), BIT(req));
> +}
> +EXPORT_SYMBOL(aspeed_sdmc_disable_mem_protection);
I don't think any of these functions need to be exported. The same
comment applies to the functions below this one; you can make them all
static and drop the extern and the EXPORT_SYMBOL.
> +
> +static const u32 ast2400_dram_table[] = {
> + 64 << 20,
> + 128 << 20,
> + 256 << 20,
> + 512 << 20,
> +};
> +
> +static const u32 ast2500_dram_table[] = {
> + 128 << 20,
> + 256 << 20,
> + 512 << 20,
> + 1024 << 20,
> +};
> +
> +static const u32 ast2600_dram_table[] = {
> + 256 << 20,
> + 512 << 20,
> + 1024 << 20,
> + 2048 << 20,
> +};
> +
> +extern u32 aspeed_get_dram_size(void)
> +{
> + u32 reg04;
> + u32 size;
> + u8 type;
> +
> + regmap_read(aspeed_regmap, ASPEED_MCR_CONF, ®04);
> +
> + type = (reg04 & ASPEED_MCR_CONF_DRAM_CTRL_TYPE) >> 28;
> +
> + if (type == ASPEED_MCR_CONF_DRAM_CTRL_TYPE_AST2600)
> + size = ast2600_dram_table[reg04 & 0x3];
> + else if (type == ASPEED_MCR_CONF_DRAM_CTRL_TYPE_AST2500)
> + size = ast2500_dram_table[reg04 & 0x3];
> + else
> + size = ast2400_dram_table[reg04 & 0x3];
> +
> + return size;
> +}
> +EXPORT_SYMBOL(aspeed_get_dram_size);
> +
> +static const u32 aspeed_vga_table[] = {
> + 8 << 20,
> + 16 << 20,
> + 32 << 20,
> + 64 << 20,
> +};
> +
> +extern u32 aspeed_get_vga_size(void)
> +{
> + u32 reg04;
> + u32 size;
> +
> + regmap_read(aspeed_regmap, ASPEED_MCR_CONF, ®04);
> +
> + size = aspeed_vga_table[((reg04 & 0xC) >> 2)];
> + return size;
If you do this:
return aspeed_vga_table[((reg04 & 0xC) >> 2)]
You can drop 'size'.
> +}
> +EXPORT_SYMBOL(aspeed_get_vga_size);
> +
> static bool regmap_is_volatile(struct device *dev, unsigned int reg)
> {
> switch (reg) {
> @@ -227,7 +300,6 @@ static int config_irq(void *ctx, struct platform_device *pdev)
> return 0;
> }
>
> -
> static int init_csrows(struct mem_ctl_info *mci)
> {
> struct csrow_info *csrow = mci->csrows[0];
> @@ -239,7 +311,7 @@ static int init_csrows(struct mem_ctl_info *mci)
> int rc;
>
> /* retrieve info about physical memory from device tree */
> - np = of_find_node_by_path("/memory");
> + np = of_find_node_by_name(NULL, "memory");
> if (!np) {
> dev_err(mci->pdev, "dt: missing /memory node\n");
> return -ENODEV;
> @@ -275,14 +347,12 @@ static int init_csrows(struct mem_ctl_info *mci)
> return 0;
> }
>
> -
> static int aspeed_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> struct edac_mc_layer layers[2];
> struct mem_ctl_info *mci;
> void __iomem *regs;
> - u32 reg04;
> int rc;
>
> regs = devm_platform_ioremap_resource(pdev, 0);
> @@ -294,13 +364,6 @@ static int aspeed_probe(struct platform_device *pdev)
> if (IS_ERR(aspeed_regmap))
> return PTR_ERR(aspeed_regmap);
>
> - /* bail out if ECC mode is not configured */
> - regmap_read(aspeed_regmap, ASPEED_MCR_CONF, ®04);
> - if (!(reg04 & ASPEED_MCR_CONF_ECC)) {
> - dev_err(&pdev->dev, "ECC mode is not configured in u-boot\n");
> - return -EPERM;
> - }
> -
> edac_op_state = EDAC_OPSTATE_INT;
>
> /* allocate & init EDAC MC data structure */
> @@ -373,12 +436,13 @@ static int aspeed_remove(struct platform_device *pdev)
> return 0;
> }
>
> -
> static const struct of_device_id aspeed_of_match[] = {
> + { .compatible = "aspeed,ast2400-sdram-edac" },
> { .compatible = "aspeed,ast2500-sdram-edac" },
> + { .compatible = "aspeed,ast2600-sdram-edac" },
> {},
> };
> -
> +MODULE_DEVICE_TABLE(of, aspeed_of_match);
>
> static struct platform_driver aspeed_driver = {
> .driver = {
> @@ -395,18 +459,15 @@ static int __init aspeed_init(void)
> return platform_driver_register(&aspeed_driver);
> }
>
> -
> static void __exit aspeed_exit(void)
> {
> platform_driver_unregister(&aspeed_driver);
> }
>
> -
> module_init(aspeed_init);
> module_exit(aspeed_exit);
Unrelated, you can clean up the above 6 lines with module_platform_driver().
Actually, looking at the kernel tree this was already done in v5.9.
Please send your next version based on the latest kernel, eg
v5.10-rc1.
Cheers,
Joel
>
> -
> MODULE_LICENSE("GPL");
> MODULE_AUTHOR("Stefan Schaeckeler <[email protected]>");
> -MODULE_DESCRIPTION("Aspeed AST2500 EDAC driver");
> +MODULE_DESCRIPTION("Aspeed EDAC driver");
> MODULE_VERSION("1.0");
> --
> 2.17.1
>
Hi Joel,
Thanks for the suggestion, I'll fix the review and create an new patch against
latest Linux branch. Those exported function will be referenced in other driver yet
to be upstream, so should I move those exported functions out of this patch?
Thanks,
Troy Lee
> -----Original Message-----
> From: Joel Stanley <[email protected]>
> Sent: Wednesday, December 2, 2020 3:02 PM
> To: Troy Lee <[email protected]>
> Cc: Stefan Schaeckeler <[email protected]>; Rob Herring
> <[email protected]>; Andrew Jeffery <[email protected]>; Borislav Petkov
> <[email protected]>; Mauro Carvalho Chehab <[email protected]>; Tony Luck
> <[email protected]>; James Morse <[email protected]>; Robert
> Richter <[email protected]>; open list:OPEN FIRMWARE AND FLATTENED
> DEVICE TREE BINDINGS <[email protected]>; moderated
> list:ARM/ASPEED MACHINE SUPPORT <[email protected]>;
> moderated list:ARM/ASPEED MACHINE SUPPORT
> <[email protected]>; open list <[email protected]>;
> open list:EDAC-CORE <[email protected]>; [email protected]; Ryan
> Chen <[email protected]>
> Subject: Re: [PATCH v2 3/3] edac: Supporting AST2400 and AST2600 edac
> driver
>
> On Wed, 2 Dec 2020 at 06:37, Troy Lee <[email protected]> wrote:
> >
> > Adding AST2400 and AST2600 edac driver support.
> >
> > Signed-off-by: Troy Lee <[email protected]>
> > ---
> > Change since v1:
> > 1. Removing SoC specific code
> > 2. Changing numerical representation of memory sizing
> > ---
> > drivers/edac/Kconfig | 6 +--
> > drivers/edac/aspeed_edac.c | 103
> > +++++++++++++++++++++++++++++--------
> > 2 files changed, 85 insertions(+), 24 deletions(-)
> >
> > diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig index
> > fc30f2ef9782..8ea70746d0bf 100644
> > --- a/drivers/edac/Kconfig
> > +++ b/drivers/edac/Kconfig
> > @@ -508,10 +508,10 @@ config EDAC_QCOM
> > health, you should probably say 'Y' here.
> >
> > config EDAC_ASPEED
> > - tristate "Aspeed AST 2500 SoC"
> > - depends on MACH_ASPEED_G5
> > + tristate "Aspeed AST BMC SoC"
> > + depends on (MACH_ASPEED_G4 || MACH_ASPEED_G5 ||
> > + MACH_ASPEED_G6)
>
> Change this to ARCH_ASPEED.
>
Fixed.
> > help
> > - Support for error detection and correction on the Aspeed AST
> 2500 SoC.
> > + Support for error detection and correction on the Aspeed AST
> BMC SoC.
> >
> > First, ECC must be configured in the bootloader. Then, this
> driver
> > will expose error counters via the EDAC kernel framework.
> > diff --git a/drivers/edac/aspeed_edac.c b/drivers/edac/aspeed_edac.c
> > index fbec28dc661d..b8c8d6a05f91 100644
> > --- a/drivers/edac/aspeed_edac.c
> > +++ b/drivers/edac/aspeed_edac.c
> > @@ -14,12 +14,11 @@
> > #include <linux/regmap.h>
> > #include "edac_module.h"
> >
> > -
>
> These whitespace cleanups are ok, but can probably go in a different patch so
> they aren't mixed up with the functional changes.
>
Okay, that make sense.
> > #define DRV_NAME "aspeed-edac"
> >
> > -
> > #define ASPEED_MCR_PROT 0x00 /* protection key register */
> > #define ASPEED_MCR_CONF 0x04 /* configuration register */
> > +#define ASPEED_MCR_REQ 0x08 /* Graphics Memory Protection
> register */
> > #define ASPEED_MCR_INTR_CTRL 0x50 /* interrupt control/status
> register */
> > #define ASPEED_MCR_ADDR_UNREC 0x58 /* address of first
> un-recoverable error */
> > #define ASPEED_MCR_ADDR_REC 0x5c /* address of last recoverable
> error */
> > @@ -29,15 +28,17 @@
> > #define ASPEED_MCR_PROT_PASSWD 0xfc600309
> > #define ASPEED_MCR_CONF_DRAM_TYPE BIT(4)
> > #define ASPEED_MCR_CONF_ECC BIT(7)
> > +#define ASPEED_MCR_CONF_DRAM_CTRL_TYPE
> > +(BIT(28)|BIT(29)|BIT(30)|BIT(31))
>
> We can use GENMASK here:
>
> GENMASK(31, 28)
>
> > #define ASPEED_MCR_INTR_CTRL_CLEAR BIT(31)
> > #define ASPEED_MCR_INTR_CTRL_CNT_REC GENMASK(23, 16)
> > #define ASPEED_MCR_INTR_CTRL_CNT_UNREC GENMASK(15, 12)
> #define
> > ASPEED_MCR_INTR_CTRL_ENABLE (BIT(0) | BIT(1))
> >
> > +#define ASPEED_MCR_CONF_DRAM_CTRL_TYPE_AST2500 0x01 #define
> > +ASPEED_MCR_CONF_DRAM_CTRL_TYPE_AST2600 0x03
> >
> > static struct regmap *aspeed_regmap;
> >
> > -
> > static int regmap_reg_write(void *context, unsigned int reg, unsigned
> > int val) {
> > void __iomem *regs = (void __iomem *)context; @@ -53,7 +54,6
> > @@ static int regmap_reg_write(void *context, unsigned int reg, unsigned
> int val)
> > return 0;
> > }
> >
> > -
> > static int regmap_reg_read(void *context, unsigned int reg, unsigned
> > int *val) {
> > void __iomem *regs = (void __iomem *)context; @@ -63,6 +63,79
> > @@ static int regmap_reg_read(void *context, unsigned int reg, unsigned int
> *val)
> > return 0;
> > }
> >
> > +extern void aspeed_sdmc_disable_mem_protection(u8 req) {
> > + u32 req_val = 0;
> > +
> > + regmap_read(aspeed_regmap, ASPEED_MCR_REQ, &req_val);
> > +
> > + req_val &= ~BIT(req);
> > +
> > + regmap_write(aspeed_regmap, ASPEED_MCR_REQ, req_val);
>
> This is open coding regmap_update_bits:
>
> regmap_update_bits(aspeed_regmap, ASPEED_MCR_REQ, BIT(req),
> BIT(req));
>
> > +}
> > +EXPORT_SYMBOL(aspeed_sdmc_disable_mem_protection);
>
> I don't think any of these functions need to be exported. The same comment
> applies to the functions below this one; you can make them all static and drop
> the extern and the EXPORT_SYMBOL.
>
> > +
> > +static const u32 ast2400_dram_table[] = {
> > + 64 << 20,
> > + 128 << 20,
> > + 256 << 20,
> > + 512 << 20,
> > +};
> > +
> > +static const u32 ast2500_dram_table[] = {
> > + 128 << 20,
> > + 256 << 20,
> > + 512 << 20,
> > + 1024 << 20,
> > +};
> > +
> > +static const u32 ast2600_dram_table[] = {
> > + 256 << 20,
> > + 512 << 20,
> > + 1024 << 20,
> > + 2048 << 20,
> > +};
> > +
> > +extern u32 aspeed_get_dram_size(void) {
> > + u32 reg04;
> > + u32 size;
> > + u8 type;
> > +
> > + regmap_read(aspeed_regmap, ASPEED_MCR_CONF, ®04);
> > +
> > + type = (reg04 & ASPEED_MCR_CONF_DRAM_CTRL_TYPE) >> 28;
> > +
> > + if (type == ASPEED_MCR_CONF_DRAM_CTRL_TYPE_AST2600)
> > + size = ast2600_dram_table[reg04 & 0x3];
> > + else if (type == ASPEED_MCR_CONF_DRAM_CTRL_TYPE_AST2500)
> > + size = ast2500_dram_table[reg04 & 0x3];
> > + else
> > + size = ast2400_dram_table[reg04 & 0x3];
> > +
> > + return size;
> > +}
> > +EXPORT_SYMBOL(aspeed_get_dram_size);
> > +
> > +static const u32 aspeed_vga_table[] = {
> > + 8 << 20,
> > + 16 << 20,
> > + 32 << 20,
> > + 64 << 20,
> > +};
> > +
> > +extern u32 aspeed_get_vga_size(void)
> > +{
> > + u32 reg04;
> > + u32 size;
> > +
> > + regmap_read(aspeed_regmap, ASPEED_MCR_CONF, ®04);
> > +
> > + size = aspeed_vga_table[((reg04 & 0xC) >> 2)];
> > + return size;
>
> If you do this:
>
> return aspeed_vga_table[((reg04 & 0xC) >> 2)]
>
> You can drop 'size'.
>
> > +}
> > +EXPORT_SYMBOL(aspeed_get_vga_size);
> > +
> > static bool regmap_is_volatile(struct device *dev, unsigned int reg)
> > {
> > switch (reg) {
> > @@ -227,7 +300,6 @@ static int config_irq(void *ctx, struct platform_device
> *pdev)
> > return 0;
> > }
> >
> > -
> > static int init_csrows(struct mem_ctl_info *mci) {
> > struct csrow_info *csrow = mci->csrows[0]; @@ -239,7 +311,7
> @@
> > static int init_csrows(struct mem_ctl_info *mci)
> > int rc;
> >
> > /* retrieve info about physical memory from device tree */
> > - np = of_find_node_by_path("/memory");
> > + np = of_find_node_by_name(NULL, "memory");
> > if (!np) {
> > dev_err(mci->pdev, "dt: missing /memory node\n");
> > return -ENODEV;
> > @@ -275,14 +347,12 @@ static int init_csrows(struct mem_ctl_info *mci)
> > return 0;
> > }
> >
> > -
> > static int aspeed_probe(struct platform_device *pdev) {
> > struct device *dev = &pdev->dev;
> > struct edac_mc_layer layers[2];
> > struct mem_ctl_info *mci;
> > void __iomem *regs;
> > - u32 reg04;
> > int rc;
> >
> > regs = devm_platform_ioremap_resource(pdev, 0); @@ -294,13
> > +364,6 @@ static int aspeed_probe(struct platform_device *pdev)
> > if (IS_ERR(aspeed_regmap))
> > return PTR_ERR(aspeed_regmap);
> >
> > - /* bail out if ECC mode is not configured */
> > - regmap_read(aspeed_regmap, ASPEED_MCR_CONF, ®04);
> > - if (!(reg04 & ASPEED_MCR_CONF_ECC)) {
> > - dev_err(&pdev->dev, "ECC mode is not configured in
> u-boot\n");
> > - return -EPERM;
> > - }
> > -
> > edac_op_state = EDAC_OPSTATE_INT;
> >
> > /* allocate & init EDAC MC data structure */ @@ -373,12
> > +436,13 @@ static int aspeed_remove(struct platform_device *pdev)
> > return 0;
> > }
> >
> > -
> > static const struct of_device_id aspeed_of_match[] = {
> > + { .compatible = "aspeed,ast2400-sdram-edac" },
> > { .compatible = "aspeed,ast2500-sdram-edac" },
> > + { .compatible = "aspeed,ast2600-sdram-edac" },
> > {},
> > };
> > -
> > +MODULE_DEVICE_TABLE(of, aspeed_of_match);
> >
> > static struct platform_driver aspeed_driver = {
> > .driver = {
> > @@ -395,18 +459,15 @@ static int __init aspeed_init(void)
> > return platform_driver_register(&aspeed_driver);
> > }
> >
> > -
> > static void __exit aspeed_exit(void)
> > {
> > platform_driver_unregister(&aspeed_driver);
> > }
> >
> > -
> > module_init(aspeed_init);
> > module_exit(aspeed_exit);
>
> Unrelated, you can clean up the above 6 lines with module_platform_driver().
>
> Actually, looking at the kernel tree this was already done in v5.9.
> Please send your next version based on the latest kernel, eg v5.10-rc1.
>
> Cheers,
>
> Joel
>
Good suggestion.
> >
> > -
> > MODULE_LICENSE("GPL");
> > MODULE_AUTHOR("Stefan Schaeckeler <[email protected]>");
> > -MODULE_DESCRIPTION("Aspeed AST2500 EDAC driver");
> > +MODULE_DESCRIPTION("Aspeed EDAC driver");
> > MODULE_VERSION("1.0");
> > --
> > 2.17.1
> >
On Wed, 2 Dec 2020, at 19:11, Troy Lee wrote:
> Hi Joel,
>
> Thanks for the suggestion, I'll fix the review and create an new patch
> against
> latest Linux branch. Those exported function will be referenced in
> other driver yet
> to be upstream, so should I move those exported functions out of this
> patch?
>
Yes, let's leave the exports out of this patch, and add them in when you send
the patch that depends on them.
Andrew
On Thu, Dec 03, 2020 at 01:32:44AM +1030, Andrew Jeffery wrote:
> On Wed, 2 Dec 2020, at 19:11, Troy Lee wrote:
> > Hi Joel,
> >
> > Thanks for the suggestion, I'll fix the review and create an new patch
> > against
> > latest Linux branch. Those exported function will be referenced in
> > other driver yet
> > to be upstream, so should I move those exported functions out of this
> > patch?
> >
>
> Yes, let's leave the exports out of this patch, and add them in when you send
> the patch that depends on them.
And when you do, almost all new exports are EXPORT_SYMBOL_GPL - not
EXPORT_SYMBOL.
Also, I'd like to see how those exports are going to be used. An EDAC
driver function exported to another driver sounds strange. We have only
one other case like this in the EDAC tree:
drivers/edac/amd64_edac.c:554:EXPORT_SYMBOL_GPL(amd64_get_dram_hole_info);
and even that is not really needed...
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
Hi Broislav and Andrew,
I removed these exported function and submitted v3 PATCH.
Thanks,
Troy Lee
> -----Original Message-----
> From: Borislav Petkov <[email protected]>
> Sent: Thursday, December 3, 2020 2:24 AM
> To: Andrew Jeffery <[email protected]>
> Cc: Troy Lee <[email protected]>; Joel Stanley <[email protected]>; open
> list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS
> <[email protected]>; Tony Luck <[email protected]>; Ryan Chen
> <[email protected]>; James Morse <[email protected]>;
> moderated list:ARM/ASPEED MACHINE SUPPORT
> <[email protected]>; open list <[email protected]>;
> Robert Richter <[email protected]>; [email protected]; Rob Herring
> <[email protected]>; Stefan M Schaeckeler <[email protected]>; Mauro
> Carvalho Chehab <[email protected]>; moderated list:ARM/ASPEED
> MACHINE SUPPORT <[email protected]>; open
> list:EDAC-CORE <[email protected]>
> Subject: Re: [PATCH v2 3/3] edac: Supporting AST2400 and AST2600 edac
> driver
>
> On Thu, Dec 03, 2020 at 01:32:44AM +1030, Andrew Jeffery wrote:
> > On Wed, 2 Dec 2020, at 19:11, Troy Lee wrote:
> > > Hi Joel,
> > >
> > > Thanks for the suggestion, I'll fix the review and create an new
> > > patch against latest Linux branch. Those exported function will be
> > > referenced in other driver yet to be upstream, so should I move
> > > those exported functions out of this patch?
> > >
> >
> > Yes, let's leave the exports out of this patch, and add them in when
> > you send the patch that depends on them.
>
> And when you do, almost all new exports are EXPORT_SYMBOL_GPL - not
> EXPORT_SYMBOL.
>
> Also, I'd like to see how those exports are going to be used. An EDAC driver
> function exported to another driver sounds strange. We have only one other
> case like this in the EDAC tree:
>
> drivers/edac/amd64_edac.c:554:EXPORT_SYMBOL_GPL(amd64_get_dram_hol
> e_info);
>
> and even that is not really needed...
>
> Thx.
>
> --
> Regards/Gruss,
> Boris.
>
> https://people.kernel.org/tglx/notes-about-netiquette
On Thu, Dec 03, 2020 at 01:27:27AM +0000, Troy Lee wrote:
> Hi Broislav and Andrew,
>
> I removed these exported function and submitted v3 PATCH.
I saw that. A couple of comments:
First of all, please do not top-post on a public mailing list.
Secondly, Joel gave you Reviewed-by: and Acked-by: for your patches 1
and 2 which are not in your new submission. But they should be, please
have a look at Documentation/process/ while you're waiting for his
review of your v3.
You don't have to resend now with those added and I can add them if Joel
is fine with patch 3 but pls remember to pick up tags reviewers have
given you, in the future.
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette