/* fuc microcode for nvc0 PGRAPH/GPC
*
* Copyright 2011 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Ben Skeggs
*/
/* To build:
* m4 nvc0_grgpc.fuc | envyas -a -w -m fuc -V nva3 -o nvc0_grgpc.fuc.h
*/
/* TODO
* - bracket certain functions with scratch writes, useful for debugging
* - watchdog timer around ctx operations
*/
.section #nvc0_grgpc_data
include(`nvc0_graph.fuc')
gpc_id: .b32 0
gpc_mmio_list_head: .b32 0
gpc_mmio_list_tail: .b32 0
tpc_count: .b32 0
tpc_mask: .b32 0
tpc_mmio_list_head: .b32 0
tpc_mmio_list_tail: .b32 0
cmd_queue: queue_init
// chipset descriptions
chipsets:
.b8 0xc0 0 0 0
.b16 #nvc0_gpc_mmio_head
.b16 #nvc0_gpc_mmio_tail
.b16 #nvc0_tpc_mmio_head
.b16 #nvc0_tpc_mmio_tail
.b8 0xc1 0 0 0
.b16 #nvc0_gpc_mmio_head
.b16 #nvc1_gpc_mmio_tail
.b16 #nvc0_tpc_mmio_head
.b16 #nvc1_tpc_mmio_tail
.b8 0xc3 0 0 0
.b16 #nvc0_gpc_mmio_head
.b16 #nvc0_gpc_mmio_tail
.b16 #nvc0_tpc_mmio_head
.b16 #nvc3_tpc_mmio_tail
.b8 0xc4 0 0 0
.b16 #nvc0_gpc_mmio_head
.b16 #nvc0_gpc_mmio_tail
.b16 #nvc0_tpc_mmio_head
.b16 #nvc3_tpc_mmio_tail
.b8 0xc8 0 0 0
.b16 #nvc0_gpc_mmio_head
.b16 #nvc0_gpc_mmio_tail
.b16 #nvc0_tpc_mmio_head
.b16 #nvc0_tpc_mmio_tail
.b8 0xce 0 0 0
.b16 #nvc0_gpc_mmio_head
.b16 #nvc0_gpc_mmio_tail
.b16 #nvc0_tpc_mmio_head
.b16 #nvc3_tpc_mmio_tail
.b8 0xcf 0 0 0
.b16 #nvc0_gpc_mmio_head
.b16 #nvc0_gpc_mmio_tail
.b16 #nvc0_tpc_mmio_head
.b16 #nvcf_tpc_mmio_tail
.b8 0xd9 0 0 0
.b16 #nvd9_gpc_mmio_head
.b16 #nvd9_gpc_mmio_tail
.b16 #nvd9_tpc_mmio_head
.b16 #nvd9_tpc_mmio_tail
.b8 0 0 0 0
// GPC mmio lists
nvc0_gpc_mmio_head:
mmctx_data(0x000380, 1)
mmctx_data(0x000400, 6)
mmctx_data(0x000450, 9)
mmctx_data(0x000600, 1)
mmctx_data(0x000684, 1)
mmctx_data(0x000700, 5)
mmctx_data(0x000800, 1)
mmctx_data(0x000808, 3)
mmctx_data(0x000828, 1)
mmctx_data(0x000830, 1)
mmctx_data(0x0008d8, 1)
mmctx_data(0x0008e0, 1)
mmctx_data(0x0008e8, 6)
mmctx_data(0x00091c, 1)
mmctx_data(0x000924, 3)
mmctx_data(0x000b00, 1)
mmctx_data(0x000b08, 6)
mmctx_data(0x000bb8, 1)
mmctx_data(0x000c08, 1)
mmctx_data(0x000c10, 8)
mmctx_data(0x000c80, 1)
mmctx_data(0x000c8c, 1)
mmctx_data(0x001000, 3)
mmctx_data(0x001014, 1)
nvc0_gpc_mmio_tail:
mmctx_data(0x000c6c, 1);
nvc1_gpc_mmio_tail:
nvd9_gpc_mmio_head:
mmctx_data(0x000380, 1)
mmctx_data(0x000400, 2)
mmctx_data(0x00040c, 3)
mmctx_data(0x000450, 9)
mmctx_data(0x000600, 1)
mmctx_data(0x000684, 1)
mmctx_data(0x000700, 5)
mmctx_data(0x000800, 1)
mmctx_data(0x000808, 3)
mmctx_data(0x000828, 1)
mmctx_data(0x000830, 1)
mmctx_data(0x0008d8, 1)
mmctx_data(0x0008e0, 1)
mmctx_data(0x0008e8, 6)
mmctx_data(0x00091c, 1)
mmctx_data(0x000924, 3)
mmctx_data(0x000b00, 1)
mmctx_data(0x000b08, 6)
mmctx_data(0x000bb8, 1)
mmctx_data(0x000c08, 1)
mmctx_data(0x000c10, 8)
mmctx_data(0x000c6c, 1)
mmctx_data(0x000c80, 1)
mmctx_data(0x000c8c, 1)
mmctx_data(0x001000, 3)
mmctx_data(0x001014, 1)
nvd9_gpc_mmio_tail:
// TPC mmio lists
nvc0_tpc_mmio_head:
mmctx_data(0x000018, 1)
mmctx_data(0x00003c, 1)
mmctx_data(0x000048, 1)
mmctx_data(0x000064, 1)
mmctx_data(0x000088, 1)
mmctx_data(0x000200, 6)
mmctx_data(0x00021c, 2)
mmctx_data(0x000300, 6)
mmctx_data(0x0003d0, 1)
mmctx_data(0x0003e0, 2)
mmctx_data(0x000400, 3)
mmctx_data(0x000420, 1)
mmctx_data(0x0004b0, 1)
mmctx_data(0x0004e8, 1)
mmctx_data(0x0004f4, 1)
mmctx_data(0x000520, 2)
mmctx_data(0x000604, 4)
mmctx_data(0x000644, 20)
mmctx_data(0x000698, 1)
mmctx_data(0x000750, 2)
nvc0_tpc_mmio_tail:
mmctx_data(0x000758, 1)
mmctx_data(0x0002c4, 1)
mmctx_data(0x0006e0, 1)
nvcf_tpc_mmio_tail:
mmctx_data(0x0004bc, 1)
nvc3_tpc_mmio_tail:
mmctx_data(0x000544, 1)
nvc1_tpc_mmio_tail:
nvd9_tpc_mmio_head:
mmctx_data(0x000018, 1)
mmctx_data(0x00003c, 1)
mmctx_data(0x000048, 1)
mmctx_data(0x000064, 1)
mmctx_data(0x000088, 1)
mmctx_data(0x000200, 6)
mmctx_data(0x00021c, 2)
mmctx_data(0x0002c4, 1)
mmctx_data(0x000300, 6)
mmctx_data(0x0003d0, 1)
mmctx_data(0x0003e0, 2)
mmctx_data(0x000400, 3)
mmctx_data(0x000420, 3)
mmctx_data(0x0004b0, 1)
mmctx_data(0x0004e8, 1)
mmctx_data(0x0004f4, 1)
mmctx_data(0x000520, 2)
mmctx_data(0x000544, 1)
mmctx_data(0x000604, 4)
mmctx_data(0x000644, 20)
mmctx_data(0x000698, 1)
mmctx_data(0x0006e0, 1)
mmctx_data(0x000750, 3)
nvd9_tpc_mmio_tail:
.section #nvc0_grgpc_code
bra #init
define(`include_code')
include(`nvc0_graph.fuc')
// reports an exception to the host
//
// In: $r15 error code (see nvc0_graph.fuc)
//
error:
push $r14
mov $r14 -0x67ec // 0x9814
sethi $r14 0x400000
call #nv_wr32 // HUB_CTXCTL_CC_SCRATCH[5] = error code
add b32 $r14 0x41c
mov $r15 1
call #nv_wr32 // HUB_CTXCTL_INTR_UP_SET
pop $r14
ret
// GPC fuc initialisation, executed by triggering ucode start, will
// fall through to main loop after completion.
//
// Input:
// CC_SCRATCH[0]: chipset (PMC_BOOT_0 read returns 0x0bad0bad... sigh)
// CC_SCRATCH[1]: context base
//
// Output:
// CC_SCRATCH[0]:
// 31:31: set to signal completion
// CC_SCRATCH[1]:
// 31:0: GPC context size
//
init:
clear b32 $r0
mov $sp $r0
// enable fifo access
mov $r1 0x1200
mov $r2 2
iowr I[$r1 + 0x000] $r2 // FIFO_ENABLE
// setup i0 handler, and route all interrupts to it
mov $r1 #ih
mov $iv0 $r1
mov $r1 0x400
iowr I[$r1 + 0x300] $r0 // INTR_DISPATCH
// enable fifo interrupt
mov $r2 4
iowr I[$r1 + 0x000] $r2 // INTR_EN_SET
// enable interrupts
bset $flags ie0
// figure out which GPC we are, and how many TPCs we have
mov $r1 0x608
shl b32 $r1 6
iord $r2 I[$r1 + 0x000] // UNITS
mov $r3 1
and $r2 0x1f
shl b32 $r3 $r2
sub b32 $r3 1
st b32 D[$r0 + #tpc_count] $r2
st b32 D[$r0 + #tpc_mask] $r3
add b32 $r1 0x400
iord $r2 I[$r1 + 0x000] // MYINDEX
st b32 D[$r0 + #gpc_id] $r2
// find context data for this chipset
mov $r2 0x800
shl b32 $r2 6
iord $r2 I[$r2 + 0x000] // CC_SCRATCH[0]
mov $r1 #chipsets - 12
init_find_chipset:
add b32 $r1 12
ld b32 $r3 D[$r1 + 0x00]
cmpu b32 $r3 $r2
bra e #init_context
cmpu b32 $r3 0
bra ne #init_find_chipset
// unknown chipset
ret
// initialise context base, and size tracking
init_context:
mov $r2 0x800
shl b32 $r2 6
iord $r2 I[$r2 + 0x100] // CC_SCRATCH[1], initial base
clear b32 $r3 // track GPC context size here
// set mmctx base addresses now so we don't have to do it later,
// they don't currently ever change
mov $r4 0x700
shl b32 $r4 6
shr b32 $r5 $r2 8
iowr I[$r4 + 0x000] $r5 // MMCTX_SAVE_SWBASE
iowr I[$r4 + 0x100] $r5 // MMCTX_LOAD_SWBASE
// calculate GPC mmio context size, store the chipset-specific
// mmio list pointers somewhere we can get at them later without
// re-parsing the chipset list
clear b32 $r14
clear b32 $r15
ld b16 $r14 D[$r1 + 4]
ld b16 $r15 D[$r1 + 6]
st b16 D[$r0 + #gpc_mmio_list_head] $r14
st b16 D[$r0 + #gpc_mmio_list_tail] $r15
call #mmctx_size
add b32 $r2 $r15
add b32 $r3 $r15
// calculate per-TPC mmio context size, store the list pointers
ld b16 $r14 D[$r1 + 8]
ld b16 $r15 D[$r1 + 10]
st b16 D[$r0 + #tpc_mmio_list_head] $r14
st b16 D[$r0 + #tpc_mmio_list_tail] $r15
call #mmctx_size
ld b32 $r14 D[$r0 + #tpc_count]
mulu $r14 $r15
add b32 $r2 $r14
add b32 $r3 $r14
// round up base/size to 256 byte boundary (for strand SWBASE)
add b32 $r4 0x1300
shr b32 $r3 2
iowr I[$r4 + 0x000] $r3 // MMCTX_LOAD_COUNT, wtf for?!?
shr b32 $r2 8
shr b32 $r3 6
add b32 $r2 1
add b32 $r3 1
shl b32 $r2 8
shl b32 $r3 8
// calculate size of strand context data
mov b32 $r15 $r2
call #strand_ctx_init
add b32 $r3 $r15
// save context size, and tell HUB we're done
mov $r1 0x800
shl b32 $r1 6
iowr I[$r1 + 0x100] $r3 // CC_SCRATCH[1] = context size
add b32 $r1 0x800
clear b32 $r2
bset $r2 31
iowr I[$r1 + 0x000] $r2 // CC_SCRATCH[0] |= 0x80000000
// Main program loop, very simple, sleeps until woken up by the interrupt
// handler, pulls a command from the queue and executes its handler
//
main:
bset $flags $p0
sleep $p0
mov $r13 #cmd_queue
call #queue_get
bra $p1 #main
// 0x0000-0x0003 are all context transfers
cmpu b32 $r14 0x04
bra nc #main_not_ctx_xfer
// fetch $flags and mask off $p1/$p2
mov $r1 $flags
mov $r2 0x0006
not b32 $r2
and $r1 $r2
// set $p1/$p2 according to transfer type
shl b32 $r14 1
or $r1 $r14
mov $flags $r1
// transfer context data
call #ctx_xfer
bra #main
main_not_ctx_xfer:
shl b32 $r15 $r14 16
or $r15 E_BAD_COMMAND
call #error
bra #main
// interrupt handler
ih:
push $r8
mov $r8 $flags
push $r8
push $r9
push $r10
push $r11
push $r13
push $r14
push $r15
// incoming fifo command?
iord $r10 I[$r0 + 0x200] // INTR
and $r11 $r10 0x00000004
bra e #ih_no_fifo
// queue incoming fifo command for later processing
mov $r11 0x1900
mov $r13 #cmd_queue
iord $r14 I[$r11 + 0x100] // FIFO_CMD
iord $r15 I[$r11 + 0x000] // FIFO_DATA
call #queue_put
add b32 $r11 0x400
mov $r14 1
iowr I[$r11 + 0x000] $r14 // FIFO_ACK
// ack, and wake up main()
ih_no_fifo:
iowr I[$r0 + 0x100] $r10 // INTR_ACK
pop $r15
pop $r14
pop $r13
pop $r11
pop $r10
pop $r9
pop $r8
mov $flags $r8
pop $r8
bclr $flags $p0
iret
// Set this GPC's bit in HUB_BAR, used to signal completion of various
// activities to the HUB fuc
//
hub_barrier_done:
mov $r15 1
ld b32 $r14 D[$r0 + #gpc_id]
shl b32 $r15 $r14
mov $r14 -0x6be8 // 0x409418 - HUB_BAR_SET
sethi $r14 0x400000
call #nv_wr32
ret
// Disables various things, waits a bit, and re-enables them..
//
// Not sure how exactly this helps, perhaps "ENABLE" is not such a
// good description for the bits we turn off? Anyways, without this,
// funny things happen.
//
ctx_redswitch:
mov $r14 0x614
shl b32 $r14 6
mov $r15 0x020
iowr I[$r14] $r15 // GPC_RED_SWITCH = POWER
mov $r15 8
ctx_redswitch_delay:
sub b32 $r15 1
bra ne #ctx_redswitch_delay
mov $r15 0xa20
iowr I[$r14] $r15 // GPC_RED_SWITCH = UNK11, ENABLE, POWER
ret
// Transfer GPC context data between GPU and storage area
//
// In: $r15 context base address
// $p1 clear on save, set on load
// $p2 set if opposite direction done/will be done, so:
// on save it means: "a load will follow this save"
// on load it means: "a save preceeded this load"
//
ctx_xfer:
// set context base address
mov $r1 0xa04
shl b32 $r1 6
iowr I[$r1 + 0x000] $r15// MEM_BASE
bra not $p1 #ctx_xfer_not_load
call #ctx_redswitch
ctx_xfer_not_load:
// strands
mov $r1 0x4afc
sethi $r1 0x20000
mov $r2 0xc
iowr I[$r1] $r2 // STRAND_CMD(0x3f) = 0x0c
call #strand_wait
mov $r2 0x47fc
sethi $r2 0x20000
iowr I[$r2] $r0 // STRAND_FIRST_GENE(0x3f) = 0x00
xbit $r2 $flags $p1
add b32 $r2 3
iowr I[$r1] $r2 // STRAND_CMD(0x3f) = 0x03/0x04 (SAVE/LOAD)
// mmio context
xbit $r10 $flags $p1 // direction
or $r10 2 // first
mov $r11 0x0000
sethi $r11 0x500000
ld b32 $r12 D[$r0 + #gpc_id]
shl b32 $r12 15
add b32 $r11 $r12 // base = NV_PGRAPH_GPCn
ld b32 $r12 D[$r0 + #gpc_mmio_list_head]
ld b32 $r13 D[$r0 + #gpc_mmio_list_tail]
mov $r14 0 // not multi
call #mmctx_xfer
// per-TPC mmio context
xbit $r10 $flags $p1 // direction
or $r10 4 // last
mov $r11 0x4000
sethi $r11 0x500000 // base = NV_PGRAPH_GPC0_TPC0
ld b32 $r12 D[$r0 + #gpc_id]
shl b32 $r12 15
add b32 $r11 $r12 // base = NV_PGRAPH_GPCn_TPC0
ld b32 $r12 D[$r0 + #tpc_mmio_list_head]
ld b32 $r13 D[$r0 + #tpc_mmio_list_tail]
ld b32 $r15 D[$r0 + #tpc_mask]
mov $r14 0x800 // stride = 0x800
call #mmctx_xfer
// wait for strands to finish
call #strand_wait
// if load, or a save without a load following, do some
// unknown stuff that's done after finishing a block of
// strand commands
bra $p1 #ctx_xfer_post
bra not $p2 #ctx_xfer_done
ctx_xfer_post:
mov $r1 0x4afc
sethi $r1 0x20000
mov $r2 0xd
iowr I[$r1] $r2 // STRAND_CMD(0x3f) = 0x0d
call #strand_wait
// mark completion in HUB's barrier
ctx_xfer_done:
call #hub_barrier_done
ret
.align 256
