| 1 | /* $NetBSD: nouveau_subdev_pwr_memx.c,v 1.1.1.1 2014/08/06 12:36:31 riastradh Exp $ */ |
| 2 | |
| 3 | #include <sys/cdefs.h> |
| 4 | __KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_pwr_memx.c,v 1.1.1.1 2014/08/06 12:36:31 riastradh Exp $" ); |
| 5 | |
| 6 | #ifndef __NVKM_PWR_MEMX_H__ |
| 7 | #define __NVKM_PWR_MEMX_H__ |
| 8 | |
| 9 | #include <subdev/pwr.h> |
| 10 | #include <subdev/pwr/fuc/os.h> |
| 11 | |
| 12 | struct nouveau_memx { |
| 13 | struct nouveau_pwr *ppwr; |
| 14 | u32 base; |
| 15 | u32 size; |
| 16 | struct { |
| 17 | u32 mthd; |
| 18 | u32 size; |
| 19 | u32 data[64]; |
| 20 | } c; |
| 21 | }; |
| 22 | |
| 23 | static void |
| 24 | memx_out(struct nouveau_memx *memx) |
| 25 | { |
| 26 | struct nouveau_pwr *ppwr = memx->ppwr; |
| 27 | int i; |
| 28 | |
| 29 | if (memx->c.size) { |
| 30 | nv_wr32(ppwr, 0x10a1c4, (memx->c.size << 16) | memx->c.mthd); |
| 31 | for (i = 0; i < memx->c.size; i++) |
| 32 | nv_wr32(ppwr, 0x10a1c4, memx->c.data[i]); |
| 33 | memx->c.size = 0; |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | static void |
| 38 | memx_cmd(struct nouveau_memx *memx, u32 mthd, u32 size, u32 data[]) |
| 39 | { |
| 40 | if ((memx->c.size + size >= ARRAY_SIZE(memx->c.data)) || |
| 41 | (memx->c.size && memx->c.mthd != mthd)) |
| 42 | memx_out(memx); |
| 43 | memcpy(&memx->c.data[memx->c.size], data, size * sizeof(data[0])); |
| 44 | memx->c.size += size; |
| 45 | memx->c.mthd = mthd; |
| 46 | } |
| 47 | |
| 48 | int |
| 49 | nouveau_memx_init(struct nouveau_pwr *ppwr, struct nouveau_memx **pmemx) |
| 50 | { |
| 51 | struct nouveau_memx *memx; |
| 52 | u32 reply[2]; |
| 53 | int ret; |
| 54 | |
| 55 | ret = ppwr->message(ppwr, reply, PROC_MEMX, MEMX_MSG_INFO, 0, 0); |
| 56 | if (ret) |
| 57 | return ret; |
| 58 | |
| 59 | memx = *pmemx = kzalloc(sizeof(*memx), GFP_KERNEL); |
| 60 | if (!memx) |
| 61 | return -ENOMEM; |
| 62 | memx->ppwr = ppwr; |
| 63 | memx->base = reply[0]; |
| 64 | memx->size = reply[1]; |
| 65 | |
| 66 | /* acquire data segment access */ |
| 67 | do { |
| 68 | nv_wr32(ppwr, 0x10a580, 0x00000003); |
| 69 | } while (nv_rd32(ppwr, 0x10a580) != 0x00000003); |
| 70 | nv_wr32(ppwr, 0x10a1c0, 0x01000000 | memx->base); |
| 71 | nv_wr32(ppwr, 0x10a1c4, 0x00010000 | MEMX_ENTER); |
| 72 | nv_wr32(ppwr, 0x10a1c4, 0x00000000); |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | int |
| 77 | nouveau_memx_fini(struct nouveau_memx **pmemx, bool exec) |
| 78 | { |
| 79 | struct nouveau_memx *memx = *pmemx; |
| 80 | struct nouveau_pwr *ppwr = memx->ppwr; |
| 81 | u32 finish, reply[2]; |
| 82 | |
| 83 | /* flush the cache... */ |
| 84 | memx_out(memx); |
| 85 | |
| 86 | /* release data segment access */ |
| 87 | nv_wr32(ppwr, 0x10a1c4, 0x00000000 | MEMX_LEAVE); |
| 88 | finish = nv_rd32(ppwr, 0x10a1c0) & 0x00ffffff; |
| 89 | nv_wr32(ppwr, 0x10a580, 0x00000000); |
| 90 | |
| 91 | /* call MEMX process to execute the script, and wait for reply */ |
| 92 | if (exec) { |
| 93 | ppwr->message(ppwr, reply, PROC_MEMX, MEMX_MSG_EXEC, |
| 94 | memx->base, finish); |
| 95 | } |
| 96 | |
| 97 | kfree(memx); |
| 98 | return 0; |
| 99 | } |
| 100 | |
| 101 | void |
| 102 | nouveau_memx_wr32(struct nouveau_memx *memx, u32 addr, u32 data) |
| 103 | { |
| 104 | nv_debug(memx->ppwr, "R[%06x] = 0x%08x\n" , addr, data); |
| 105 | memx_cmd(memx, MEMX_WR32, 2, (u32[]){ addr, data }); |
| 106 | } |
| 107 | |
| 108 | void |
| 109 | nouveau_memx_wait(struct nouveau_memx *memx, |
| 110 | u32 addr, u32 mask, u32 data, u32 nsec) |
| 111 | { |
| 112 | nv_debug(memx->ppwr, "R[%06x] & 0x%08x == 0x%08x, %d us\n" , |
| 113 | addr, mask, data, nsec); |
| 114 | memx_cmd(memx, MEMX_WAIT, 4, (u32[]){ addr, ~mask, data, nsec }); |
| 115 | memx_out(memx); /* fuc can't handle multiple */ |
| 116 | } |
| 117 | |
| 118 | void |
| 119 | nouveau_memx_nsec(struct nouveau_memx *memx, u32 nsec) |
| 120 | { |
| 121 | nv_debug(memx->ppwr, " DELAY = %d ns\n" , nsec); |
| 122 | memx_cmd(memx, MEMX_DELAY, 1, (u32[]){ nsec }); |
| 123 | memx_out(memx); /* fuc can't handle multiple */ |
| 124 | } |
| 125 | |
| 126 | #endif |
| 127 | |