diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/atom.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/atom.c | 1420 |
1 files changed, 1420 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/atom.c b/drivers/gpu/drm/radeon/atom.c new file mode 100644 index 000000000..e55cbeee7 --- /dev/null +++ b/drivers/gpu/drm/radeon/atom.c @@ -0,0 +1,1420 @@ +/* + * Copyright 2008 Advanced Micro Devices, 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. + * + * Author: Stanislaw Skowronek + */ + +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <asm/unaligned.h> + +#define ATOM_DEBUG + +#include "atom.h" +#include "atom-names.h" +#include "atom-bits.h" +#include "radeon.h" + +#define ATOM_COND_ABOVE 0 +#define ATOM_COND_ABOVEOREQUAL 1 +#define ATOM_COND_ALWAYS 2 +#define ATOM_COND_BELOW 3 +#define ATOM_COND_BELOWOREQUAL 4 +#define ATOM_COND_EQUAL 5 +#define ATOM_COND_NOTEQUAL 6 + +#define ATOM_PORT_ATI 0 +#define ATOM_PORT_PCI 1 +#define ATOM_PORT_SYSIO 2 + +#define ATOM_UNIT_MICROSEC 0 +#define ATOM_UNIT_MILLISEC 1 + +#define PLL_INDEX 2 +#define PLL_DATA 3 + +typedef struct { + struct atom_context *ctx; + uint32_t *ps, *ws; + int ps_shift; + uint16_t start; + unsigned last_jump; + unsigned long last_jump_jiffies; + bool abort; +} atom_exec_context; + +int atom_debug = 0; +static int atom_execute_table_locked(struct atom_context *ctx, int index, uint32_t * params); +int atom_execute_table(struct atom_context *ctx, int index, uint32_t * params); + +static uint32_t atom_arg_mask[8] = { + 0xFFFFFFFF, 0x0000FFFF, 0x00FFFF00, 0xFFFF0000, + 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000 +}; +static int atom_arg_shift[8] = { 0, 0, 8, 16, 0, 8, 16, 24 }; + +static int atom_dst_to_src[8][4] = { + /* translate destination alignment field to the source alignment encoding */ + {0, 0, 0, 0}, + {1, 2, 3, 0}, + {1, 2, 3, 0}, + {1, 2, 3, 0}, + {4, 5, 6, 7}, + {4, 5, 6, 7}, + {4, 5, 6, 7}, + {4, 5, 6, 7}, +}; +static int atom_def_dst[8] = { 0, 0, 1, 2, 0, 1, 2, 3 }; + +static int debug_depth = 0; +#ifdef ATOM_DEBUG +static void debug_print_spaces(int n) +{ + while (n--) + printk(" "); +} + +#define DEBUG(...) do if (atom_debug) { printk(KERN_DEBUG __VA_ARGS__); } while (0) +#define SDEBUG(...) do if (atom_debug) { printk(KERN_DEBUG); debug_print_spaces(debug_depth); printk(__VA_ARGS__); } while (0) +#else +#define DEBUG(...) do { } while (0) +#define SDEBUG(...) do { } while (0) +#endif + +static uint32_t atom_iio_execute(struct atom_context *ctx, int base, + uint32_t index, uint32_t data) +{ + struct radeon_device *rdev = ctx->card->dev->dev_private; + uint32_t temp = 0xCDCDCDCD; + + while (1) + switch (CU8(base)) { + case ATOM_IIO_NOP: + base++; + break; + case ATOM_IIO_READ: + temp = ctx->card->ioreg_read(ctx->card, CU16(base + 1)); + base += 3; + break; + case ATOM_IIO_WRITE: + if (rdev->family == CHIP_RV515) + (void)ctx->card->ioreg_read(ctx->card, CU16(base + 1)); + ctx->card->ioreg_write(ctx->card, CU16(base + 1), temp); + base += 3; + break; + case ATOM_IIO_CLEAR: + temp &= + ~((0xFFFFFFFF >> (32 - CU8(base + 1))) << + CU8(base + 2)); + base += 3; + break; + case ATOM_IIO_SET: + temp |= + (0xFFFFFFFF >> (32 - CU8(base + 1))) << CU8(base + + 2); + base += 3; + break; + case ATOM_IIO_MOVE_INDEX: + temp &= + ~((0xFFFFFFFF >> (32 - CU8(base + 1))) << + CU8(base + 3)); + temp |= + ((index >> CU8(base + 2)) & + (0xFFFFFFFF >> (32 - CU8(base + 1)))) << CU8(base + + 3); + base += 4; + break; + case ATOM_IIO_MOVE_DATA: + temp &= + ~((0xFFFFFFFF >> (32 - CU8(base + 1))) << + CU8(base + 3)); + temp |= + ((data >> CU8(base + 2)) & + (0xFFFFFFFF >> (32 - CU8(base + 1)))) << CU8(base + + 3); + base += 4; + break; + case ATOM_IIO_MOVE_ATTR: + temp &= + ~((0xFFFFFFFF >> (32 - CU8(base + 1))) << + CU8(base + 3)); + temp |= + ((ctx-> + io_attr >> CU8(base + 2)) & (0xFFFFFFFF >> (32 - + CU8 + (base + + + 1)))) + << CU8(base + 3); + base += 4; + break; + case ATOM_IIO_END: + return temp; + default: + pr_info("Unknown IIO opcode\n"); + return 0; + } +} + +static uint32_t atom_get_src_int(atom_exec_context *ctx, uint8_t attr, + int *ptr, uint32_t *saved, int print) +{ + uint32_t idx, val = 0xCDCDCDCD, align, arg; + struct atom_context *gctx = ctx->ctx; + arg = attr & 7; + align = (attr >> 3) & 7; + switch (arg) { + case ATOM_ARG_REG: + idx = U16(*ptr); + (*ptr) += 2; + if (print) + DEBUG("REG[0x%04X]", idx); + idx += gctx->reg_block; + switch (gctx->io_mode) { + case ATOM_IO_MM: + val = gctx->card->reg_read(gctx->card, idx); + break; + case ATOM_IO_PCI: + pr_info("PCI registers are not implemented\n"); + return 0; + case ATOM_IO_SYSIO: + pr_info("SYSIO registers are not implemented\n"); + return 0; + default: + if (!(gctx->io_mode & 0x80)) { + pr_info("Bad IO mode\n"); + return 0; + } + if (!gctx->iio[gctx->io_mode & 0x7F]) { + pr_info("Undefined indirect IO read method %d\n", + gctx->io_mode & 0x7F); + return 0; + } + val = + atom_iio_execute(gctx, + gctx->iio[gctx->io_mode & 0x7F], + idx, 0); + } + break; + case ATOM_ARG_PS: + idx = U8(*ptr); + (*ptr)++; + /* get_unaligned_le32 avoids unaligned accesses from atombios + * tables, noticed on a DEC Alpha. */ + val = get_unaligned_le32((u32 *)&ctx->ps[idx]); + if (print) + DEBUG("PS[0x%02X,0x%04X]", idx, val); + break; + case ATOM_ARG_WS: + idx = U8(*ptr); + (*ptr)++; + if (print) + DEBUG("WS[0x%02X]", idx); + switch (idx) { + case ATOM_WS_QUOTIENT: + val = gctx->divmul[0]; + break; + case ATOM_WS_REMAINDER: + val = gctx->divmul[1]; + break; + case ATOM_WS_DATAPTR: + val = gctx->data_block; + break; + case ATOM_WS_SHIFT: + val = gctx->shift; + break; + case ATOM_WS_OR_MASK: + val = 1 << gctx->shift; + break; + case ATOM_WS_AND_MASK: + val = ~(1 << gctx->shift); + break; + case ATOM_WS_FB_WINDOW: + val = gctx->fb_base; + break; + case ATOM_WS_ATTRIBUTES: + val = gctx->io_attr; + break; + case ATOM_WS_REGPTR: + val = gctx->reg_block; + break; + default: + val = ctx->ws[idx]; + } + break; + case ATOM_ARG_ID: + idx = U16(*ptr); + (*ptr) += 2; + if (print) { + if (gctx->data_block) + DEBUG("ID[0x%04X+%04X]", idx, gctx->data_block); + else + DEBUG("ID[0x%04X]", idx); + } + val = U32(idx + gctx->data_block); + break; + case ATOM_ARG_FB: + idx = U8(*ptr); + (*ptr)++; + if ((gctx->fb_base + (idx * 4)) > gctx->scratch_size_bytes) { + DRM_ERROR("ATOM: fb read beyond scratch region: %d vs. %d\n", + gctx->fb_base + (idx * 4), gctx->scratch_size_bytes); + val = 0; + } else + val = gctx->scratch[(gctx->fb_base / 4) + idx]; + if (print) + DEBUG("FB[0x%02X]", idx); + break; + case ATOM_ARG_IMM: + switch (align) { + case ATOM_SRC_DWORD: + val = U32(*ptr); + (*ptr) += 4; + if (print) + DEBUG("IMM 0x%08X\n", val); + return val; + case ATOM_SRC_WORD0: + case ATOM_SRC_WORD8: + case ATOM_SRC_WORD16: + val = U16(*ptr); + (*ptr) += 2; + if (print) + DEBUG("IMM 0x%04X\n", val); + return val; + case ATOM_SRC_BYTE0: + case ATOM_SRC_BYTE8: + case ATOM_SRC_BYTE16: + case ATOM_SRC_BYTE24: + val = U8(*ptr); + (*ptr)++; + if (print) + DEBUG("IMM 0x%02X\n", val); + return val; + } + return 0; + case ATOM_ARG_PLL: + idx = U8(*ptr); + (*ptr)++; + if (print) + DEBUG("PLL[0x%02X]", idx); + val = gctx->card->pll_read(gctx->card, idx); + break; + case ATOM_ARG_MC: + idx = U8(*ptr); + (*ptr)++; + if (print) + DEBUG("MC[0x%02X]", idx); + val = gctx->card->mc_read(gctx->card, idx); + break; + } + if (saved) + *saved = val; + val &= atom_arg_mask[align]; + val >>= atom_arg_shift[align]; + if (print) + switch (align) { + case ATOM_SRC_DWORD: + DEBUG(".[31:0] -> 0x%08X\n", val); + break; + case ATOM_SRC_WORD0: + DEBUG(".[15:0] -> 0x%04X\n", val); + break; + case ATOM_SRC_WORD8: + DEBUG(".[23:8] -> 0x%04X\n", val); + break; + case ATOM_SRC_WORD16: + DEBUG(".[31:16] -> 0x%04X\n", val); + break; + case ATOM_SRC_BYTE0: + DEBUG(".[7:0] -> 0x%02X\n", val); + break; + case ATOM_SRC_BYTE8: + DEBUG(".[15:8] -> 0x%02X\n", val); + break; + case ATOM_SRC_BYTE16: + DEBUG(".[23:16] -> 0x%02X\n", val); + break; + case ATOM_SRC_BYTE24: + DEBUG(".[31:24] -> 0x%02X\n", val); + break; + } + return val; +} + +static void atom_skip_src_int(atom_exec_context *ctx, uint8_t attr, int *ptr) +{ + uint32_t align = (attr >> 3) & 7, arg = attr & 7; + switch (arg) { + case ATOM_ARG_REG: + case ATOM_ARG_ID: + (*ptr) += 2; + break; + case ATOM_ARG_PLL: + case ATOM_ARG_MC: + case ATOM_ARG_PS: + case ATOM_ARG_WS: + case ATOM_ARG_FB: + (*ptr)++; + break; + case ATOM_ARG_IMM: + switch (align) { + case ATOM_SRC_DWORD: + (*ptr) += 4; + return; + case ATOM_SRC_WORD0: + case ATOM_SRC_WORD8: + case ATOM_SRC_WORD16: + (*ptr) += 2; + return; + case ATOM_SRC_BYTE0: + case ATOM_SRC_BYTE8: + case ATOM_SRC_BYTE16: + case ATOM_SRC_BYTE24: + (*ptr)++; + return; + } + return; + } +} + +static uint32_t atom_get_src(atom_exec_context *ctx, uint8_t attr, int *ptr) +{ + return atom_get_src_int(ctx, attr, ptr, NULL, 1); +} + +static uint32_t atom_get_src_direct(atom_exec_context *ctx, uint8_t align, int *ptr) +{ + uint32_t val = 0xCDCDCDCD; + + switch (align) { + case ATOM_SRC_DWORD: + val = U32(*ptr); + (*ptr) += 4; + break; + case ATOM_SRC_WORD0: + case ATOM_SRC_WORD8: + case ATOM_SRC_WORD16: + val = U16(*ptr); + (*ptr) += 2; + break; + case ATOM_SRC_BYTE0: + case ATOM_SRC_BYTE8: + case ATOM_SRC_BYTE16: + case ATOM_SRC_BYTE24: + val = U8(*ptr); + (*ptr)++; + break; + } + return val; +} + +static uint32_t atom_get_dst(atom_exec_context *ctx, int arg, uint8_t attr, + int *ptr, uint32_t *saved, int print) +{ + return atom_get_src_int(ctx, + arg | atom_dst_to_src[(attr >> 3) & + 7][(attr >> 6) & 3] << 3, + ptr, saved, print); +} + +static void atom_skip_dst(atom_exec_context *ctx, int arg, uint8_t attr, int *ptr) +{ + atom_skip_src_int(ctx, + arg | atom_dst_to_src[(attr >> 3) & 7][(attr >> 6) & + 3] << 3, ptr); +} + +static void atom_put_dst(atom_exec_context *ctx, int arg, uint8_t attr, + int *ptr, uint32_t val, uint32_t saved) +{ + uint32_t align = + atom_dst_to_src[(attr >> 3) & 7][(attr >> 6) & 3], old_val = + val, idx; + struct atom_context *gctx = ctx->ctx; + old_val &= atom_arg_mask[align] >> atom_arg_shift[align]; + val <<= atom_arg_shift[align]; + val &= atom_arg_mask[align]; + saved &= ~atom_arg_mask[align]; + val |= saved; + switch (arg) { + case ATOM_ARG_REG: + idx = U16(*ptr); + (*ptr) += 2; + DEBUG("REG[0x%04X]", idx); + idx += gctx->reg_block; + switch (gctx->io_mode) { + case ATOM_IO_MM: + if (idx == 0) + gctx->card->reg_write(gctx->card, idx, + val << 2); + else + gctx->card->reg_write(gctx->card, idx, val); + break; + case ATOM_IO_PCI: + pr_info("PCI registers are not implemented\n"); + return; + case ATOM_IO_SYSIO: + pr_info("SYSIO registers are not implemented\n"); + return; + default: + if (!(gctx->io_mode & 0x80)) { + pr_info("Bad IO mode\n"); + return; + } + if (!gctx->iio[gctx->io_mode & 0xFF]) { + pr_info("Undefined indirect IO write method %d\n", + gctx->io_mode & 0x7F); + return; + } + atom_iio_execute(gctx, gctx->iio[gctx->io_mode & 0xFF], + idx, val); + } + break; + case ATOM_ARG_PS: + idx = U8(*ptr); + (*ptr)++; + DEBUG("PS[0x%02X]", idx); + ctx->ps[idx] = cpu_to_le32(val); + break; + case ATOM_ARG_WS: + idx = U8(*ptr); + (*ptr)++; + DEBUG("WS[0x%02X]", idx); + switch (idx) { + case ATOM_WS_QUOTIENT: + gctx->divmul[0] = val; + break; + case ATOM_WS_REMAINDER: + gctx->divmul[1] = val; + break; + case ATOM_WS_DATAPTR: + gctx->data_block = val; + break; + case ATOM_WS_SHIFT: + gctx->shift = val; + break; + case ATOM_WS_OR_MASK: + case ATOM_WS_AND_MASK: + break; + case ATOM_WS_FB_WINDOW: + gctx->fb_base = val; + break; + case ATOM_WS_ATTRIBUTES: + gctx->io_attr = val; + break; + case ATOM_WS_REGPTR: + gctx->reg_block = val; + break; + default: + ctx->ws[idx] = val; + } + break; + case ATOM_ARG_FB: + idx = U8(*ptr); + (*ptr)++; + if ((gctx->fb_base + (idx * 4)) > gctx->scratch_size_bytes) { + DRM_ERROR("ATOM: fb write beyond scratch region: %d vs. %d\n", + gctx->fb_base + (idx * 4), gctx->scratch_size_bytes); + } else + gctx->scratch[(gctx->fb_base / 4) + idx] = val; + DEBUG("FB[0x%02X]", idx); + break; + case ATOM_ARG_PLL: + idx = U8(*ptr); + (*ptr)++; + DEBUG("PLL[0x%02X]", idx); + gctx->card->pll_write(gctx->card, idx, val); + break; + case ATOM_ARG_MC: + idx = U8(*ptr); + (*ptr)++; + DEBUG("MC[0x%02X]", idx); + gctx->card->mc_write(gctx->card, idx, val); + return; + } + switch (align) { + case ATOM_SRC_DWORD: + DEBUG(".[31:0] <- 0x%08X\n", old_val); + break; + case ATOM_SRC_WORD0: + DEBUG(".[15:0] <- 0x%04X\n", old_val); + break; + case ATOM_SRC_WORD8: + DEBUG(".[23:8] <- 0x%04X\n", old_val); + break; + case ATOM_SRC_WORD16: + DEBUG(".[31:16] <- 0x%04X\n", old_val); + break; + case ATOM_SRC_BYTE0: + DEBUG(".[7:0] <- 0x%02X\n", old_val); + break; + case ATOM_SRC_BYTE8: + DEBUG(".[15:8] <- 0x%02X\n", old_val); + break; + case ATOM_SRC_BYTE16: + DEBUG(".[23:16] <- 0x%02X\n", old_val); + break; + case ATOM_SRC_BYTE24: + DEBUG(".[31:24] <- 0x%02X\n", old_val); + break; + } +} + +static void atom_op_add(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t attr = U8((*ptr)++); + uint32_t dst, src, saved; + int dptr = *ptr; + SDEBUG(" dst: "); + dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1); + SDEBUG(" src: "); + src = atom_get_src(ctx, attr, ptr); + dst += src; + SDEBUG(" dst: "); + atom_put_dst(ctx, arg, attr, &dptr, dst, saved); +} + +static void atom_op_and(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t attr = U8((*ptr)++); + uint32_t dst, src, saved; + int dptr = *ptr; + SDEBUG(" dst: "); + dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1); + SDEBUG(" src: "); + src = atom_get_src(ctx, attr, ptr); + dst &= src; + SDEBUG(" dst: "); + atom_put_dst(ctx, arg, attr, &dptr, dst, saved); +} + +static void atom_op_beep(atom_exec_context *ctx, int *ptr, int arg) +{ + printk("ATOM BIOS beeped!\n"); +} + +static void atom_op_calltable(atom_exec_context *ctx, int *ptr, int arg) +{ + int idx = U8((*ptr)++); + int r = 0; + + if (idx < ATOM_TABLE_NAMES_CNT) + SDEBUG(" table: %d (%s)\n", idx, atom_table_names[idx]); + else + SDEBUG(" table: %d\n", idx); + if (U16(ctx->ctx->cmd_table + 4 + 2 * idx)) + r = atom_execute_table_locked(ctx->ctx, idx, ctx->ps + ctx->ps_shift); + if (r) { + ctx->abort = true; + } +} + +static void atom_op_clear(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t attr = U8((*ptr)++); + uint32_t saved; + int dptr = *ptr; + attr &= 0x38; + attr |= atom_def_dst[attr >> 3] << 6; + atom_get_dst(ctx, arg, attr, ptr, &saved, 0); + SDEBUG(" dst: "); + atom_put_dst(ctx, arg, attr, &dptr, 0, saved); +} + +static void atom_op_compare(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t attr = U8((*ptr)++); + uint32_t dst, src; + SDEBUG(" src1: "); + dst = atom_get_dst(ctx, arg, attr, ptr, NULL, 1); + SDEBUG(" src2: "); + src = atom_get_src(ctx, attr, ptr); + ctx->ctx->cs_equal = (dst == src); + ctx->ctx->cs_above = (dst > src); + SDEBUG(" result: %s %s\n", ctx->ctx->cs_equal ? "EQ" : "NE", + ctx->ctx->cs_above ? "GT" : "LE"); +} + +static void atom_op_delay(atom_exec_context *ctx, int *ptr, int arg) +{ + unsigned count = U8((*ptr)++); + SDEBUG(" count: %d\n", count); + if (arg == ATOM_UNIT_MICROSEC) + udelay(count); + else if (!drm_can_sleep()) + mdelay(count); + else + msleep(count); +} + +static void atom_op_div(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t attr = U8((*ptr)++); + uint32_t dst, src; + SDEBUG(" src1: "); + dst = atom_get_dst(ctx, arg, attr, ptr, NULL, 1); + SDEBUG(" src2: "); + src = atom_get_src(ctx, attr, ptr); + if (src != 0) { + ctx->ctx->divmul[0] = dst / src; + ctx->ctx->divmul[1] = dst % src; + } else { + ctx->ctx->divmul[0] = 0; + ctx->ctx->divmul[1] = 0; + } +} + +static void atom_op_eot(atom_exec_context *ctx, int *ptr, int arg) +{ + /* functionally, a nop */ +} + +static void atom_op_jump(atom_exec_context *ctx, int *ptr, int arg) +{ + int execute = 0, target = U16(*ptr); + unsigned long cjiffies; + + (*ptr) += 2; + switch (arg) { + case ATOM_COND_ABOVE: + execute = ctx->ctx->cs_above; + break; + case ATOM_COND_ABOVEOREQUAL: + execute = ctx->ctx->cs_above || ctx->ctx->cs_equal; + break; + case ATOM_COND_ALWAYS: + execute = 1; + break; + case ATOM_COND_BELOW: + execute = !(ctx->ctx->cs_above || ctx->ctx->cs_equal); + break; + case ATOM_COND_BELOWOREQUAL: + execute = !ctx->ctx->cs_above; + break; + case ATOM_COND_EQUAL: + execute = ctx->ctx->cs_equal; + break; + case ATOM_COND_NOTEQUAL: + execute = !ctx->ctx->cs_equal; + break; + } + if (arg != ATOM_COND_ALWAYS) + SDEBUG(" taken: %s\n", execute ? "yes" : "no"); + SDEBUG(" target: 0x%04X\n", target); + if (execute) { + if (ctx->last_jump == (ctx->start + target)) { + cjiffies = jiffies; + if (time_after(cjiffies, ctx->last_jump_jiffies)) { + cjiffies -= ctx->last_jump_jiffies; + if ((jiffies_to_msecs(cjiffies) > 5000)) { + DRM_ERROR("atombios stuck in loop for more than 5secs aborting\n"); + ctx->abort = true; + } + } else { + /* jiffies wrap around we will just wait a little longer */ + ctx->last_jump_jiffies = jiffies; + } + } else { + ctx->last_jump = ctx->start + target; + ctx->last_jump_jiffies = jiffies; + } + *ptr = ctx->start + target; + } +} + +static void atom_op_mask(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t attr = U8((*ptr)++); + uint32_t dst, mask, src, saved; + int dptr = *ptr; + SDEBUG(" dst: "); + dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1); + mask = atom_get_src_direct(ctx, ((attr >> 3) & 7), ptr); + SDEBUG(" mask: 0x%08x", mask); + SDEBUG(" src: "); + src = atom_get_src(ctx, attr, ptr); + dst &= mask; + dst |= src; + SDEBUG(" dst: "); + atom_put_dst(ctx, arg, attr, &dptr, dst, saved); +} + +static void atom_op_move(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t attr = U8((*ptr)++); + uint32_t src, saved; + int dptr = *ptr; + if (((attr >> 3) & 7) != ATOM_SRC_DWORD) + atom_get_dst(ctx, arg, attr, ptr, &saved, 0); + else { + atom_skip_dst(ctx, arg, attr, ptr); + saved = 0xCDCDCDCD; + } + SDEBUG(" src: "); + src = atom_get_src(ctx, attr, ptr); + SDEBUG(" dst: "); + atom_put_dst(ctx, arg, attr, &dptr, src, saved); +} + +static void atom_op_mul(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t attr = U8((*ptr)++); + uint32_t dst, src; + SDEBUG(" src1: "); + dst = atom_get_dst(ctx, arg, attr, ptr, NULL, 1); + SDEBUG(" src2: "); + src = atom_get_src(ctx, attr, ptr); + ctx->ctx->divmul[0] = dst * src; +} + +static void atom_op_nop(atom_exec_context *ctx, int *ptr, int arg) +{ + /* nothing */ +} + +static void atom_op_or(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t attr = U8((*ptr)++); + uint32_t dst, src, saved; + int dptr = *ptr; + SDEBUG(" dst: "); + dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1); + SDEBUG(" src: "); + src = atom_get_src(ctx, attr, ptr); + dst |= src; + SDEBUG(" dst: "); + atom_put_dst(ctx, arg, attr, &dptr, dst, saved); +} + +static void atom_op_postcard(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t val = U8((*ptr)++); + SDEBUG("POST card output: 0x%02X\n", val); +} + +static void atom_op_repeat(atom_exec_context *ctx, int *ptr, int arg) +{ + pr_info("unimplemented!\n"); +} + +static void atom_op_restorereg(atom_exec_context *ctx, int *ptr, int arg) +{ + pr_info("unimplemented!\n"); +} + +static void atom_op_savereg(atom_exec_context *ctx, int *ptr, int arg) +{ + pr_info("unimplemented!\n"); +} + +static void atom_op_setdatablock(atom_exec_context *ctx, int *ptr, int arg) +{ + int idx = U8(*ptr); + (*ptr)++; + SDEBUG(" block: %d\n", idx); + if (!idx) + ctx->ctx->data_block = 0; + else if (idx == 255) + ctx->ctx->data_block = ctx->start; + else + ctx->ctx->data_block = U16(ctx->ctx->data_table + 4 + 2 * idx); + SDEBUG(" base: 0x%04X\n", ctx->ctx->data_block); +} + +static void atom_op_setfbbase(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t attr = U8((*ptr)++); + SDEBUG(" fb_base: "); + ctx->ctx->fb_base = atom_get_src(ctx, attr, ptr); +} + +static void atom_op_setport(atom_exec_context *ctx, int *ptr, int arg) +{ + int port; + switch (arg) { + case ATOM_PORT_ATI: + port = U16(*ptr); + if (port < ATOM_IO_NAMES_CNT) + SDEBUG(" port: %d (%s)\n", port, atom_io_names[port]); + else + SDEBUG(" port: %d\n", port); + if (!port) + ctx->ctx->io_mode = ATOM_IO_MM; + else + ctx->ctx->io_mode = ATOM_IO_IIO | port; + (*ptr) += 2; + break; + case ATOM_PORT_PCI: + ctx->ctx->io_mode = ATOM_IO_PCI; + (*ptr)++; + break; + case ATOM_PORT_SYSIO: + ctx->ctx->io_mode = ATOM_IO_SYSIO; + (*ptr)++; + break; + } +} + +static void atom_op_setregblock(atom_exec_context *ctx, int *ptr, int arg) +{ + ctx->ctx->reg_block = U16(*ptr); + (*ptr) += 2; + SDEBUG(" base: 0x%04X\n", ctx->ctx->reg_block); +} + +static void atom_op_shift_left(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t attr = U8((*ptr)++), shift; + uint32_t saved, dst; + int dptr = *ptr; + attr &= 0x38; + attr |= atom_def_dst[attr >> 3] << 6; + SDEBUG(" dst: "); + dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1); + shift = atom_get_src_direct(ctx, ATOM_SRC_BYTE0, ptr); + SDEBUG(" shift: %d\n", shift); + dst <<= shift; + SDEBUG(" dst: "); + atom_put_dst(ctx, arg, attr, &dptr, dst, saved); +} + +static void atom_op_shift_right(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t attr = U8((*ptr)++), shift; + uint32_t saved, dst; + int dptr = *ptr; + attr &= 0x38; + attr |= atom_def_dst[attr >> 3] << 6; + SDEBUG(" dst: "); + dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1); + shift = atom_get_src_direct(ctx, ATOM_SRC_BYTE0, ptr); + SDEBUG(" shift: %d\n", shift); + dst >>= shift; + SDEBUG(" dst: "); + atom_put_dst(ctx, arg, attr, &dptr, dst, saved); +} + +static void atom_op_shl(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t attr = U8((*ptr)++), shift; + uint32_t saved, dst; + int dptr = *ptr; + uint32_t dst_align = atom_dst_to_src[(attr >> 3) & 7][(attr >> 6) & 3]; + SDEBUG(" dst: "); + dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1); + /* op needs to full dst value */ + dst = saved; + shift = atom_get_src(ctx, attr, ptr); + SDEBUG(" shift: %d\n", shift); + dst <<= shift; + dst &= atom_arg_mask[dst_align]; + dst >>= atom_arg_shift[dst_align]; + SDEBUG(" dst: "); + atom_put_dst(ctx, arg, attr, &dptr, dst, saved); +} + +static void atom_op_shr(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t attr = U8((*ptr)++), shift; + uint32_t saved, dst; + int dptr = *ptr; + uint32_t dst_align = atom_dst_to_src[(attr >> 3) & 7][(attr >> 6) & 3]; + SDEBUG(" dst: "); + dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1); + /* op needs to full dst value */ + dst = saved; + shift = atom_get_src(ctx, attr, ptr); + SDEBUG(" shift: %d\n", shift); + dst >>= shift; + dst &= atom_arg_mask[dst_align]; + dst >>= atom_arg_shift[dst_align]; + SDEBUG(" dst: "); + atom_put_dst(ctx, arg, attr, &dptr, dst, saved); +} + +static void atom_op_sub(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t attr = U8((*ptr)++); + uint32_t dst, src, saved; + int dptr = *ptr; + SDEBUG(" dst: "); + dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1); + SDEBUG(" src: "); + src = atom_get_src(ctx, attr, ptr); + dst -= src; + SDEBUG(" dst: "); + atom_put_dst(ctx, arg, attr, &dptr, dst, saved); +} + +static void atom_op_switch(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t attr = U8((*ptr)++); + uint32_t src, val, target; + SDEBUG(" switch: "); + src = atom_get_src(ctx, attr, ptr); + while (U16(*ptr) != ATOM_CASE_END) + if (U8(*ptr) == ATOM_CASE_MAGIC) { + (*ptr)++; + SDEBUG(" case: "); + val = + atom_get_src(ctx, (attr & 0x38) | ATOM_ARG_IMM, + ptr); + target = U16(*ptr); + if (val == src) { + SDEBUG(" target: %04X\n", target); + *ptr = ctx->start + target; + return; + } + (*ptr) += 2; + } else { + pr_info("Bad case\n"); + return; + } + (*ptr) += 2; +} + +static void atom_op_test(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t attr = U8((*ptr)++); + uint32_t dst, src; + SDEBUG(" src1: "); + dst = atom_get_dst(ctx, arg, attr, ptr, NULL, 1); + SDEBUG(" src2: "); + src = atom_get_src(ctx, attr, ptr); + ctx->ctx->cs_equal = ((dst & src) == 0); + SDEBUG(" result: %s\n", ctx->ctx->cs_equal ? "EQ" : "NE"); +} + +static void atom_op_xor(atom_exec_context *ctx, int *ptr, int arg) +{ + uint8_t attr = U8((*ptr)++); + uint32_t dst, src, saved; + int dptr = *ptr; + SDEBUG(" dst: "); + dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1); + SDEBUG(" src: "); + src = atom_get_src(ctx, attr, ptr); + dst ^= src; + SDEBUG(" dst: "); + atom_put_dst(ctx, arg, attr, &dptr, dst, saved); +} + +static void atom_op_debug(atom_exec_context *ctx, int *ptr, int arg) +{ + pr_info("unimplemented!\n"); +} + +static struct { + void (*func) (atom_exec_context *, int *, int); + int arg; +} opcode_table[ATOM_OP_CNT] = { + { + NULL, 0}, { + atom_op_move, ATOM_ARG_REG}, { + atom_op_move, ATOM_ARG_PS}, { + atom_op_move, ATOM_ARG_WS}, { + atom_op_move, ATOM_ARG_FB}, { + atom_op_move, ATOM_ARG_PLL}, { + atom_op_move, ATOM_ARG_MC}, { + atom_op_and, ATOM_ARG_REG}, { + atom_op_and, ATOM_ARG_PS}, { + atom_op_and, ATOM_ARG_WS}, { + atom_op_and, ATOM_ARG_FB}, { + atom_op_and, ATOM_ARG_PLL}, { + atom_op_and, ATOM_ARG_MC}, { + atom_op_or, ATOM_ARG_REG}, { + atom_op_or, ATOM_ARG_PS}, { + atom_op_or, ATOM_ARG_WS}, { + atom_op_or, ATOM_ARG_FB}, { + atom_op_or, ATOM_ARG_PLL}, { + atom_op_or, ATOM_ARG_MC}, { + atom_op_shift_left, ATOM_ARG_REG}, { + atom_op_shift_left, ATOM_ARG_PS}, { + atom_op_shift_left, ATOM_ARG_WS}, { + atom_op_shift_left, ATOM_ARG_FB}, { + atom_op_shift_left, ATOM_ARG_PLL}, { + atom_op_shift_left, ATOM_ARG_MC}, { + atom_op_shift_right, ATOM_ARG_REG}, { + atom_op_shift_right, ATOM_ARG_PS}, { + atom_op_shift_right, ATOM_ARG_WS}, { + atom_op_shift_right, ATOM_ARG_FB}, { + atom_op_shift_right, ATOM_ARG_PLL}, { + atom_op_shift_right, ATOM_ARG_MC}, { + atom_op_mul, ATOM_ARG_REG}, { + atom_op_mul, ATOM_ARG_PS}, { + atom_op_mul, ATOM_ARG_WS}, { + atom_op_mul, ATOM_ARG_FB}, { + atom_op_mul, ATOM_ARG_PLL}, { + atom_op_mul, ATOM_ARG_MC}, { + atom_op_div, ATOM_ARG_REG}, { + atom_op_div, ATOM_ARG_PS}, { + atom_op_div, ATOM_ARG_WS}, { + atom_op_div, ATOM_ARG_FB}, { + atom_op_div, ATOM_ARG_PLL}, { + atom_op_div, ATOM_ARG_MC}, { + atom_op_add, ATOM_ARG_REG}, { + atom_op_add, ATOM_ARG_PS}, { + atom_op_add, ATOM_ARG_WS}, { + atom_op_add, ATOM_ARG_FB}, { + atom_op_add, ATOM_ARG_PLL}, { + atom_op_add, ATOM_ARG_MC}, { + atom_op_sub, ATOM_ARG_REG}, { + atom_op_sub, ATOM_ARG_PS}, { + atom_op_sub, ATOM_ARG_WS}, { + atom_op_sub, ATOM_ARG_FB}, { + atom_op_sub, ATOM_ARG_PLL}, { + atom_op_sub, ATOM_ARG_MC}, { + atom_op_setport, ATOM_PORT_ATI}, { + atom_op_setport, ATOM_PORT_PCI}, { + atom_op_setport, ATOM_PORT_SYSIO}, { + atom_op_setregblock, 0}, { + atom_op_setfbbase, 0}, { + atom_op_compare, ATOM_ARG_REG}, { + atom_op_compare, ATOM_ARG_PS}, { + atom_op_compare, ATOM_ARG_WS}, { + atom_op_compare, ATOM_ARG_FB}, { + atom_op_compare, ATOM_ARG_PLL}, { + atom_op_compare, ATOM_ARG_MC}, { + atom_op_switch, 0}, { + atom_op_jump, ATOM_COND_ALWAYS}, { + atom_op_jump, ATOM_COND_EQUAL}, { + atom_op_jump, ATOM_COND_BELOW}, { + atom_op_jump, ATOM_COND_ABOVE}, { + atom_op_jump, ATOM_COND_BELOWOREQUAL}, { + atom_op_jump, ATOM_COND_ABOVEOREQUAL}, { + atom_op_jump, ATOM_COND_NOTEQUAL}, { + atom_op_test, ATOM_ARG_REG}, { + atom_op_test, ATOM_ARG_PS}, { + atom_op_test, ATOM_ARG_WS}, { + atom_op_test, ATOM_ARG_FB}, { + atom_op_test, ATOM_ARG_PLL}, { + atom_op_test, ATOM_ARG_MC}, { + atom_op_delay, ATOM_UNIT_MILLISEC}, { + atom_op_delay, ATOM_UNIT_MICROSEC}, { + atom_op_calltable, 0}, { + atom_op_repeat, 0}, { + atom_op_clear, ATOM_ARG_REG}, { + atom_op_clear, ATOM_ARG_PS}, { + atom_op_clear, ATOM_ARG_WS}, { + atom_op_clear, ATOM_ARG_FB}, { + atom_op_clear, ATOM_ARG_PLL}, { + atom_op_clear, ATOM_ARG_MC}, { + atom_op_nop, 0}, { + atom_op_eot, 0}, { + atom_op_mask, ATOM_ARG_REG}, { + atom_op_mask, ATOM_ARG_PS}, { + atom_op_mask, ATOM_ARG_WS}, { + atom_op_mask, ATOM_ARG_FB}, { + atom_op_mask, ATOM_ARG_PLL}, { + atom_op_mask, ATOM_ARG_MC}, { + atom_op_postcard, 0}, { + atom_op_beep, 0}, { + atom_op_savereg, 0}, { + atom_op_restorereg, 0}, { + atom_op_setdatablock, 0}, { + atom_op_xor, ATOM_ARG_REG}, { + atom_op_xor, ATOM_ARG_PS}, { + atom_op_xor, ATOM_ARG_WS}, { + atom_op_xor, ATOM_ARG_FB}, { + atom_op_xor, ATOM_ARG_PLL}, { + atom_op_xor, ATOM_ARG_MC}, { + atom_op_shl, ATOM_ARG_REG}, { + atom_op_shl, ATOM_ARG_PS}, { + atom_op_shl, ATOM_ARG_WS}, { + atom_op_shl, ATOM_ARG_FB}, { + atom_op_shl, ATOM_ARG_PLL}, { + atom_op_shl, ATOM_ARG_MC}, { + atom_op_shr, ATOM_ARG_REG}, { + atom_op_shr, ATOM_ARG_PS}, { + atom_op_shr, ATOM_ARG_WS}, { + atom_op_shr, ATOM_ARG_FB}, { + atom_op_shr, ATOM_ARG_PLL}, { + atom_op_shr, ATOM_ARG_MC}, { +atom_op_debug, 0},}; + +static int atom_execute_table_locked(struct atom_context *ctx, int index, uint32_t * params) +{ + int base = CU16(ctx->cmd_table + 4 + 2 * index); + int len, ws, ps, ptr; + unsigned char op; + atom_exec_context ectx; + int ret = 0; + + if (!base) + return -EINVAL; + + len = CU16(base + ATOM_CT_SIZE_PTR); + ws = CU8(base + ATOM_CT_WS_PTR); + ps = CU8(base + ATOM_CT_PS_PTR) & ATOM_CT_PS_MASK; + ptr = base + ATOM_CT_CODE_PTR; + + SDEBUG(">> execute %04X (len %d, WS %d, PS %d)\n", base, len, ws, ps); + + ectx.ctx = ctx; + ectx.ps_shift = ps / 4; + ectx.start = base; + ectx.ps = params; + ectx.abort = false; + ectx.last_jump = 0; + if (ws) + ectx.ws = kcalloc(4, ws, GFP_KERNEL); + else + ectx.ws = NULL; + + debug_depth++; + while (1) { + op = CU8(ptr++); + if (op < ATOM_OP_NAMES_CNT) + SDEBUG("%s @ 0x%04X\n", atom_op_names[op], ptr - 1); + else + SDEBUG("[%d] @ 0x%04X\n", op, ptr - 1); + if (ectx.abort) { + DRM_ERROR("atombios stuck executing %04X (len %d, WS %d, PS %d) @ 0x%04X\n", + base, len, ws, ps, ptr - 1); + ret = -EINVAL; + goto free; + } + + if (op < ATOM_OP_CNT && op > 0) + opcode_table[op].func(&ectx, &ptr, + opcode_table[op].arg); + else + break; + + if (op == ATOM_OP_EOT) + break; + } + debug_depth--; + SDEBUG("<<\n"); + +free: + if (ws) + kfree(ectx.ws); + return ret; +} + +int atom_execute_table_scratch_unlocked(struct atom_context *ctx, int index, uint32_t * params) +{ + int r; + + mutex_lock(&ctx->mutex); + /* reset data block */ + ctx->data_block = 0; + /* reset reg block */ + ctx->reg_block = 0; + /* reset fb window */ + ctx->fb_base = 0; + /* reset io mode */ + ctx->io_mode = ATOM_IO_MM; + /* reset divmul */ + ctx->divmul[0] = 0; + ctx->divmul[1] = 0; + r = atom_execute_table_locked(ctx, index, params); + mutex_unlock(&ctx->mutex); + return r; +} + +int atom_execute_table(struct atom_context *ctx, int index, uint32_t * params) +{ + int r; + mutex_lock(&ctx->scratch_mutex); + r = atom_execute_table_scratch_unlocked(ctx, index, params); + mutex_unlock(&ctx->scratch_mutex); + return r; +} + +static int atom_iio_len[] = { 1, 2, 3, 3, 3, 3, 4, 4, 4, 3 }; + +static void atom_index_iio(struct atom_context *ctx, int base) +{ + ctx->iio = kzalloc(2 * 256, GFP_KERNEL); + if (!ctx->iio) + return; + while (CU8(base) == ATOM_IIO_START) { + ctx->iio[CU8(base + 1)] = base + 2; + base += 2; + while (CU8(base) != ATOM_IIO_END) + base += atom_iio_len[CU8(base)]; + base += 3; + } +} + +struct atom_context *atom_parse(struct card_info *card, void *bios) +{ + int base; + struct atom_context *ctx = + kzalloc(sizeof(struct atom_context), GFP_KERNEL); + char *str; + char name[512]; + int i; + + if (!ctx) + return NULL; + + ctx->card = card; + ctx->bios = bios; + + if (CU16(0) != ATOM_BIOS_MAGIC) { + pr_info("Invalid BIOS magic\n"); + kfree(ctx); + return NULL; + } + if (strncmp + (CSTR(ATOM_ATI_MAGIC_PTR), ATOM_ATI_MAGIC, + strlen(ATOM_ATI_MAGIC))) { + pr_info("Invalid ATI magic\n"); + kfree(ctx); + return NULL; + } + + base = CU16(ATOM_ROM_TABLE_PTR); + if (strncmp + (CSTR(base + ATOM_ROM_MAGIC_PTR), ATOM_ROM_MAGIC, + strlen(ATOM_ROM_MAGIC))) { + pr_info("Invalid ATOM magic\n"); + kfree(ctx); + return NULL; + } + + ctx->cmd_table = CU16(base + ATOM_ROM_CMD_PTR); + ctx->data_table = CU16(base + ATOM_ROM_DATA_PTR); + atom_index_iio(ctx, CU16(ctx->data_table + ATOM_DATA_IIO_PTR) + 4); + if (!ctx->iio) { + atom_destroy(ctx); + return NULL; + } + + str = CSTR(CU16(base + ATOM_ROM_MSG_PTR)); + while (*str && ((*str == '\n') || (*str == '\r'))) + str++; + /* name string isn't always 0 terminated */ + for (i = 0; i < 511; i++) { + name[i] = str[i]; + if (name[i] < '.' || name[i] > 'z') { + name[i] = 0; + break; + } + } + pr_info("ATOM BIOS: %s\n", name); + + return ctx; +} + +int atom_asic_init(struct atom_context *ctx) +{ + struct radeon_device *rdev = ctx->card->dev->dev_private; + int hwi = CU16(ctx->data_table + ATOM_DATA_FWI_PTR); + uint32_t ps[16]; + int ret; + + memset(ps, 0, 64); + + ps[0] = cpu_to_le32(CU32(hwi + ATOM_FWI_DEFSCLK_PTR)); + ps[1] = cpu_to_le32(CU32(hwi + ATOM_FWI_DEFMCLK_PTR)); + if (!ps[0] || !ps[1]) + return 1; + + if (!CU16(ctx->cmd_table + 4 + 2 * ATOM_CMD_INIT)) + return 1; + ret = atom_execute_table(ctx, ATOM_CMD_INIT, ps); + if (ret) + return ret; + + memset(ps, 0, 64); + + if (rdev->family < CHIP_R600) { + if (CU16(ctx->cmd_table + 4 + 2 * ATOM_CMD_SPDFANCNTL)) + atom_execute_table(ctx, ATOM_CMD_SPDFANCNTL, ps); + } + return ret; +} + +void atom_destroy(struct atom_context *ctx) +{ + kfree(ctx->iio); + kfree(ctx); +} + +bool atom_parse_data_header(struct atom_context *ctx, int index, + uint16_t * size, uint8_t * frev, uint8_t * crev, + uint16_t * data_start) +{ + int offset = index * 2 + 4; + int idx = CU16(ctx->data_table + offset); + u16 *mdt = (u16 *)(ctx->bios + ctx->data_table + 4); + + if (!mdt[index]) + return false; + + if (size) + *size = CU16(idx); + if (frev) + *frev = CU8(idx + 2); + if (crev) + *crev = CU8(idx + 3); + *data_start = idx; + return true; +} + +bool atom_parse_cmd_header(struct atom_context *ctx, int index, uint8_t * frev, + uint8_t * crev) +{ + int offset = index * 2 + 4; + int idx = CU16(ctx->cmd_table + offset); + u16 *mct = (u16 *)(ctx->bios + ctx->cmd_table + 4); + + if (!mct[index]) + return false; + + if (frev) + *frev = CU8(idx + 2); + if (crev) + *crev = CU8(idx + 3); + return true; +} + +int atom_allocate_fb_scratch(struct atom_context *ctx) +{ + int index = GetIndexIntoMasterTable(DATA, VRAM_UsageByFirmware); + uint16_t data_offset; + int usage_bytes = 0; + struct _ATOM_VRAM_USAGE_BY_FIRMWARE *firmware_usage; + + if (atom_parse_data_header(ctx, index, NULL, NULL, NULL, &data_offset)) { + firmware_usage = (struct _ATOM_VRAM_USAGE_BY_FIRMWARE *)(ctx->bios + data_offset); + + DRM_DEBUG("atom firmware requested %08x %dkb\n", + le32_to_cpu(firmware_usage->asFirmwareVramReserveInfo[0].ulStartAddrUsedByFirmware), + le16_to_cpu(firmware_usage->asFirmwareVramReserveInfo[0].usFirmwareUseInKb)); + + usage_bytes = le16_to_cpu(firmware_usage->asFirmwareVramReserveInfo[0].usFirmwareUseInKb) * 1024; + } + ctx->scratch_size_bytes = 0; + if (usage_bytes == 0) + usage_bytes = 20 * 1024; + /* allocate some scratch memory */ + ctx->scratch = kzalloc(usage_bytes, GFP_KERNEL); + if (!ctx->scratch) + return -ENOMEM; + ctx->scratch_size_bytes = usage_bytes; + return 0; +} |