mirror of
https://github.com/torvalds/linux.git
synced 2024-12-05 10:32:35 +00:00
891e60368b
Now that we have symbol namespaces, use them in MCB to not pollute the default namespace with MCB internals. Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Jessica Yu <jeyu@kernel.org> Reviewed-by: Michael Moese <mmoese@suse.de> Link: https://lore.kernel.org/r/20191016100158.1400-1-jthumshirn@suse.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
257 lines
5.2 KiB
C
257 lines
5.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
#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,
|
|
struct chameleon_bar *cb,
|
|
void __iomem *base)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int chameleon_parse_gdd(struct mcb_bus *bus,
|
|
struct chameleon_bar *cb,
|
|
void __iomem *base, int bar_count)
|
|
{
|
|
struct chameleon_gdd __iomem *gdd =
|
|
(struct chameleon_gdd __iomem *) base;
|
|
struct mcb_device *mdev;
|
|
u32 dev_mapbase;
|
|
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(reg2);
|
|
mdev->group = GDD_GRP(reg2);
|
|
mdev->inst = GDD_INS(reg2);
|
|
|
|
/*
|
|
* If the BAR is missing, dev_mapbase is zero, or if the
|
|
* device is IO mapped we just print a warning and go on with the
|
|
* next device, instead of completely stop the gdd parser
|
|
*/
|
|
if (mdev->bar > bar_count - 1) {
|
|
pr_info("No BAR for 16z%03d\n", mdev->id);
|
|
ret = 0;
|
|
goto err;
|
|
}
|
|
|
|
dev_mapbase = cb[mdev->bar].addr;
|
|
if (!dev_mapbase) {
|
|
pr_info("BAR not assigned for 16z%03d\n", mdev->id);
|
|
ret = 0;
|
|
goto err;
|
|
}
|
|
|
|
if (dev_mapbase & 0x01) {
|
|
pr_info("IO mapped Device (16z%03d) not yet supported\n",
|
|
mdev->id);
|
|
ret = 0;
|
|
goto err;
|
|
}
|
|
|
|
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 = dev_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;
|
|
}
|
|
|
|
static void chameleon_parse_bar(void __iomem *base,
|
|
struct chameleon_bar *cb, int bar_count)
|
|
{
|
|
char __iomem *p = base;
|
|
int i;
|
|
|
|
/* skip reg1 */
|
|
p += sizeof(__le32);
|
|
|
|
for (i = 0; i < bar_count; i++) {
|
|
cb[i].addr = readl(p);
|
|
cb[i].size = readl(p + 4);
|
|
|
|
p += sizeof(struct chameleon_bar);
|
|
}
|
|
}
|
|
|
|
static int chameleon_get_bar(char __iomem **base, phys_addr_t mapbase,
|
|
struct chameleon_bar **cb)
|
|
{
|
|
struct chameleon_bar *c;
|
|
int bar_count;
|
|
__le32 reg;
|
|
u32 dtype;
|
|
|
|
/*
|
|
* For those devices which are not connected
|
|
* to the PCI Bus (e.g. LPC) there is a bar
|
|
* descriptor located directly after the
|
|
* chameleon header. This header is comparable
|
|
* to a PCI header.
|
|
*/
|
|
dtype = get_next_dtype(*base);
|
|
if (dtype == CHAMELEON_DTYPE_BAR) {
|
|
reg = readl(*base);
|
|
|
|
bar_count = BAR_CNT(reg);
|
|
if (bar_count <= 0 || bar_count > CHAMELEON_BAR_MAX)
|
|
return -ENODEV;
|
|
|
|
c = kcalloc(bar_count, sizeof(struct chameleon_bar),
|
|
GFP_KERNEL);
|
|
if (!c)
|
|
return -ENOMEM;
|
|
|
|
chameleon_parse_bar(*base, c, bar_count);
|
|
*base += BAR_DESC_SIZE(bar_count);
|
|
} else {
|
|
c = kzalloc(sizeof(struct chameleon_bar), GFP_KERNEL);
|
|
if (!c)
|
|
return -ENOMEM;
|
|
|
|
bar_count = 1;
|
|
c->addr = mapbase;
|
|
}
|
|
|
|
*cb = c;
|
|
|
|
return bar_count;
|
|
}
|
|
|
|
int chameleon_parse_cells(struct mcb_bus *bus, phys_addr_t mapbase,
|
|
void __iomem *base)
|
|
{
|
|
struct chameleon_fpga_header *header;
|
|
struct chameleon_bar *cb;
|
|
char __iomem *p = base;
|
|
int num_cells = 0;
|
|
uint32_t dtype;
|
|
int bar_count;
|
|
int ret;
|
|
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);
|
|
ret = -ENODEV;
|
|
goto free_header;
|
|
}
|
|
p += hsize;
|
|
|
|
bus->revision = header->revision;
|
|
bus->model = header->model;
|
|
bus->minor = header->minor;
|
|
snprintf(bus->name, CHAMELEON_FILENAME_LEN + 1, "%s",
|
|
header->filename);
|
|
|
|
bar_count = chameleon_get_bar(&p, mapbase, &cb);
|
|
if (bar_count < 0) {
|
|
ret = bar_count;
|
|
goto free_header;
|
|
}
|
|
|
|
for_each_chameleon_cell(dtype, p) {
|
|
switch (dtype) {
|
|
case CHAMELEON_DTYPE_GENERAL:
|
|
ret = chameleon_parse_gdd(bus, cb, p, bar_count);
|
|
if (ret < 0)
|
|
goto free_bar;
|
|
p += sizeof(struct chameleon_gdd);
|
|
break;
|
|
case CHAMELEON_DTYPE_BRIDGE:
|
|
chameleon_parse_bdd(bus, cb, p);
|
|
p += sizeof(struct chameleon_bdd);
|
|
break;
|
|
case CHAMELEON_DTYPE_END:
|
|
break;
|
|
default:
|
|
pr_err("Invalid chameleon descriptor type 0x%x\n",
|
|
dtype);
|
|
ret = -EINVAL;
|
|
goto free_bar;
|
|
}
|
|
num_cells++;
|
|
}
|
|
|
|
if (num_cells == 0)
|
|
num_cells = -EINVAL;
|
|
|
|
kfree(cb);
|
|
kfree(header);
|
|
return num_cells;
|
|
|
|
free_bar:
|
|
kfree(cb);
|
|
free_header:
|
|
kfree(header);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_NS_GPL(chameleon_parse_cells, MCB);
|