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nexedi
linux
Commits
912b461d
Commit
912b461d
authored
Mar 19, 2004
by
Dave Jones
Committed by
Dave Jones
Mar 19, 2004
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[AGPGART] AGPv3 generic support.
If a chipset doesn't need anything funky, then it can use these routines.
parent
cf22c86f
Changes
2
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2 changed files
with
101 additions
and
1 deletion
+101
-1
drivers/char/agp/agp.h
drivers/char/agp/agp.h
+19
-1
drivers/char/agp/generic.c
drivers/char/agp/generic.c
+82
-0
No files found.
drivers/char/agp/agp.h
View file @
912b461d
...
...
@@ -272,6 +272,17 @@ void global_cache_flush(void);
void
get_agp_version
(
struct
agp_bridge_data
*
bridge
);
unsigned
long
agp_generic_mask_memory
(
unsigned
long
addr
,
int
type
);
/* generic routines for agp>=3 */
int
agp3_generic_fetch_size
(
void
);
void
agp3_generic_tlbflush
(
struct
agp_memory
*
mem
);
int
agp3_generic_configure
(
void
);
void
agp3_generic_cleanup
(
void
);
/* aperture sizes have been standardised since v3 */
#define AGP_GENERIC_SIZES_ENTRIES 11
extern
struct
aper_size_info_16
agp3_generic_sizes
[];
extern
int
agp_off
;
extern
int
agp_try_unsupported_boot
;
...
...
@@ -281,14 +292,18 @@ extern int agp_try_unsupported_boot;
#define AGPSTAT 0x4
#define AGPCMD 0x8
#define AGPNISTAT 0xc
#define AGPCTRL 0x10
#define AGPCTRL 0x10
#define AGPAPSIZE 0x14
#define AGPNEPG 0x16
#define AGPGARTLO 0x18
#define AGPGARTHI 0x1c
#define AGPNICMD 0x20
#define AGP_MAJOR_VERSION_SHIFT (20)
#define AGP_MINOR_VERSION_SHIFT (16)
#define AGPSTAT_RQ_DEPTH (0xff000000)
#define AGPSTAT_RQ_DEPTH_SHIFT 24
#define AGPSTAT_CAL_MASK (1<<12|1<<11|1<<10)
#define AGPSTAT_ARQSZ (1<<15|1<<14|1<<13)
...
...
@@ -307,4 +322,7 @@ extern int agp_try_unsupported_boot;
#define AGPSTAT3_8X (1<<1)
#define AGPSTAT3_4X (1)
#define AGPCTRL_APERENB (1<<8)
#define AGPCTRL_GTLBEN (1<<7)
#endif
/* _AGP_BACKEND_PRIV_H */
drivers/char/agp/generic.c
View file @
912b461d
...
...
@@ -964,3 +964,85 @@ unsigned long agp_generic_mask_memory(unsigned long addr, int type)
}
EXPORT_SYMBOL
(
agp_generic_mask_memory
);
/*
* These functions are implemented according to the AGPv3 spec,
* which covers implementation details that had previously been
* left open.
*/
int
agp3_generic_fetch_size
(
void
)
{
u16
temp_size
;
int
i
;
struct
aper_size_info_16
*
values
;
pci_read_config_word
(
agp_bridge
->
dev
,
agp_bridge
->
capndx
+
AGPAPSIZE
,
&
temp_size
);
values
=
A_SIZE_16
(
agp_bridge
->
driver
->
aperture_sizes
);
for
(
i
=
0
;
i
<
agp_bridge
->
driver
->
num_aperture_sizes
;
i
++
)
{
if
(
temp_size
==
values
[
i
].
size_value
)
{
agp_bridge
->
previous_size
=
agp_bridge
->
current_size
=
(
void
*
)
(
values
+
i
);
agp_bridge
->
aperture_size_idx
=
i
;
return
values
[
i
].
size
;
}
}
return
0
;
}
EXPORT_SYMBOL
(
agp3_generic_fetch_size
);
void
agp3_generic_tlbflush
(
struct
agp_memory
*
mem
)
{
u32
ctrl
;
pci_read_config_dword
(
agp_bridge
->
dev
,
agp_bridge
->
capndx
+
AGPCTRL
,
&
ctrl
);
pci_write_config_dword
(
agp_bridge
->
dev
,
agp_bridge
->
capndx
+
AGPCTRL
,
ctrl
&
~
AGPCTRL_GTLBEN
);
pci_write_config_dword
(
agp_bridge
->
dev
,
agp_bridge
->
capndx
+
AGPCTRL
,
ctrl
);
}
EXPORT_SYMBOL
(
agp3_generic_tlbflush
);
int
agp3_generic_configure
(
void
)
{
u32
temp
;
struct
aper_size_info_16
*
current_size
;
current_size
=
A_SIZE_16
(
agp_bridge
->
current_size
);
pci_read_config_dword
(
agp_bridge
->
dev
,
AGP_APBASE
,
&
temp
);
agp_bridge
->
gart_bus_addr
=
(
temp
&
PCI_BASE_ADDRESS_MEM_MASK
);
// set aperture size
pci_write_config_word
(
agp_bridge
->
dev
,
agp_bridge
->
capndx
+
AGPAPSIZE
,
current_size
->
size_value
);
// set gart pointer
pci_write_config_dword
(
agp_bridge
->
dev
,
agp_bridge
->
capndx
+
AGPGARTLO
,
agp_bridge
->
gatt_bus_addr
);
// enable aperture and GTLB
pci_read_config_dword
(
agp_bridge
->
dev
,
agp_bridge
->
capndx
+
AGPCTRL
,
&
temp
);
pci_write_config_dword
(
agp_bridge
->
dev
,
agp_bridge
->
capndx
+
AGPCTRL
,
temp
|
AGPCTRL_APERENB
|
AGPCTRL_GTLBEN
);
return
0
;
}
EXPORT_SYMBOL
(
agp3_generic_configure
);
void
agp3_generic_cleanup
(
void
)
{
u32
ctrl
;
pci_read_config_dword
(
agp_bridge
->
dev
,
agp_bridge
->
capndx
+
AGPCTRL
,
&
ctrl
);
pci_write_config_dword
(
agp_bridge
->
dev
,
agp_bridge
->
capndx
+
AGPCTRL
,
ctrl
&
~
AGPCTRL_APERENB
);
}
EXPORT_SYMBOL
(
agp3_generic_cleanup
);
struct
aper_size_info_16
agp3_generic_sizes
[
AGP_GENERIC_SIZES_ENTRIES
]
=
{
{
4096
,
1048576
,
10
,
0x000
},
{
2048
,
524288
,
9
,
0x800
},
{
1024
,
262144
,
8
,
0xc00
},
{
512
,
131072
,
7
,
0xe00
},
{
256
,
65536
,
6
,
0xf00
},
{
128
,
32768
,
5
,
0xf20
},
{
64
,
16384
,
4
,
0xf30
},
{
32
,
8192
,
3
,
0xf38
},
{
16
,
4096
,
2
,
0xf3c
},
{
8
,
2048
,
1
,
0xf3e
},
{
4
,
1024
,
0
,
0xf3f
}
};
EXPORT_SYMBOL
(
agp3_generic_sizes
);
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