mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 00:06:41 +07:00
7c73528273
chameleon_parse_cells() bails out if chameleon descriptor type is invalid but does not free the storage 'header' points to. Signed-off-by: Christoph Jaeger <christophjaeger@linux.com> Signed-off-by: Johannes Thumshirn <johannes.thumshirn@men.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
161 lines
3.3 KiB
C
161 lines
3.3 KiB
C
#include <linux/types.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/export.h>
|
|
#include <linux/io.h>
|
|
#include <linux/mcb.h>
|
|
|
|
#include "mcb-internal.h"
|
|
|
|
struct mcb_parse_priv {
|
|
phys_addr_t mapbase;
|
|
void __iomem *base;
|
|
};
|
|
|
|
#define for_each_chameleon_cell(dtype, p) \
|
|
for ((dtype) = get_next_dtype((p)); \
|
|
(dtype) != CHAMELEON_DTYPE_END; \
|
|
(dtype) = get_next_dtype((p)))
|
|
|
|
static inline uint32_t get_next_dtype(void __iomem *p)
|
|
{
|
|
uint32_t dtype;
|
|
|
|
dtype = readl(p);
|
|
return dtype >> 28;
|
|
}
|
|
|
|
static int chameleon_parse_bdd(struct mcb_bus *bus,
|
|
phys_addr_t mapbase,
|
|
void __iomem *base)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int chameleon_parse_gdd(struct mcb_bus *bus,
|
|
phys_addr_t mapbase,
|
|
void __iomem *base)
|
|
{
|
|
struct chameleon_gdd __iomem *gdd =
|
|
(struct chameleon_gdd __iomem *) base;
|
|
struct mcb_device *mdev;
|
|
u32 offset;
|
|
u32 size;
|
|
int ret;
|
|
__le32 reg1;
|
|
__le32 reg2;
|
|
|
|
mdev = mcb_alloc_dev(bus);
|
|
if (!mdev)
|
|
return -ENOMEM;
|
|
|
|
reg1 = readl(&gdd->reg1);
|
|
reg2 = readl(&gdd->reg2);
|
|
offset = readl(&gdd->offset);
|
|
size = readl(&gdd->size);
|
|
|
|
mdev->id = GDD_DEV(reg1);
|
|
mdev->rev = GDD_REV(reg1);
|
|
mdev->var = GDD_VAR(reg1);
|
|
mdev->bar = GDD_BAR(reg1);
|
|
mdev->group = GDD_GRP(reg2);
|
|
mdev->inst = GDD_INS(reg2);
|
|
|
|
pr_debug("Found a 16z%03d\n", mdev->id);
|
|
|
|
mdev->irq.start = GDD_IRQ(reg1);
|
|
mdev->irq.end = GDD_IRQ(reg1);
|
|
mdev->irq.flags = IORESOURCE_IRQ;
|
|
|
|
mdev->mem.start = mapbase + offset;
|
|
mdev->mem.end = mdev->mem.start + size - 1;
|
|
mdev->mem.flags = IORESOURCE_MEM;
|
|
|
|
mdev->is_added = false;
|
|
|
|
ret = mcb_device_register(bus, mdev);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
return 0;
|
|
|
|
err:
|
|
mcb_free_dev(mdev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int chameleon_parse_cells(struct mcb_bus *bus, phys_addr_t mapbase,
|
|
void __iomem *base)
|
|
{
|
|
char __iomem *p = base;
|
|
struct chameleon_fpga_header *header;
|
|
uint32_t dtype;
|
|
int num_cells = 0;
|
|
int ret = 0;
|
|
u32 hsize;
|
|
|
|
hsize = sizeof(struct chameleon_fpga_header);
|
|
|
|
header = kzalloc(hsize, GFP_KERNEL);
|
|
if (!header)
|
|
return -ENOMEM;
|
|
|
|
/* Extract header information */
|
|
memcpy_fromio(header, p, hsize);
|
|
/* We only support chameleon v2 at the moment */
|
|
header->magic = le16_to_cpu(header->magic);
|
|
if (header->magic != CHAMELEONV2_MAGIC) {
|
|
pr_err("Unsupported chameleon version 0x%x\n",
|
|
header->magic);
|
|
kfree(header);
|
|
return -ENODEV;
|
|
}
|
|
p += hsize;
|
|
|
|
pr_debug("header->revision = %d\n", header->revision);
|
|
pr_debug("header->model = 0x%x ('%c')\n", header->model,
|
|
header->model);
|
|
pr_debug("header->minor = %d\n", header->minor);
|
|
pr_debug("header->bus_type = 0x%x\n", header->bus_type);
|
|
|
|
|
|
pr_debug("header->magic = 0x%x\n", header->magic);
|
|
pr_debug("header->filename = \"%.*s\"\n", CHAMELEON_FILENAME_LEN,
|
|
header->filename);
|
|
|
|
for_each_chameleon_cell(dtype, p) {
|
|
switch (dtype) {
|
|
case CHAMELEON_DTYPE_GENERAL:
|
|
ret = chameleon_parse_gdd(bus, mapbase, p);
|
|
if (ret < 0)
|
|
goto out;
|
|
p += sizeof(struct chameleon_gdd);
|
|
break;
|
|
case CHAMELEON_DTYPE_BRIDGE:
|
|
chameleon_parse_bdd(bus, mapbase, p);
|
|
p += sizeof(struct chameleon_bdd);
|
|
break;
|
|
case CHAMELEON_DTYPE_END:
|
|
break;
|
|
default:
|
|
pr_err("Invalid chameleon descriptor type 0x%x\n",
|
|
dtype);
|
|
kfree(header);
|
|
return -EINVAL;
|
|
}
|
|
num_cells++;
|
|
}
|
|
|
|
if (num_cells == 0)
|
|
num_cells = -EINVAL;
|
|
|
|
kfree(header);
|
|
return num_cells;
|
|
|
|
out:
|
|
kfree(header);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(chameleon_parse_cells);
|