diff options
Diffstat (limited to 'drivers/char/drm/via_verifier.c')
| -rw-r--r-- | drivers/char/drm/via_verifier.c | 1116 |
1 files changed, 0 insertions, 1116 deletions
diff --git a/drivers/char/drm/via_verifier.c b/drivers/char/drm/via_verifier.c deleted file mode 100644 index 46a579198747..000000000000 --- a/drivers/char/drm/via_verifier.c +++ /dev/null @@ -1,1116 +0,0 @@ -/* - * Copyright 2004 The Unichrome Project. All Rights Reserved. - * Copyright 2005 Thomas Hellstrom. All Rights Reserved. - * - * 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, sub license, - * 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 (including the - * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL - * THE AUTHOR(S), AND/OR THE COPYRIGHT HOLDER(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: Thomas Hellstrom 2004, 2005. - * This code was written using docs obtained under NDA from VIA Inc. - * - * Don't run this code directly on an AGP buffer. Due to cache problems it will - * be very slow. - */ - -#include "via_3d_reg.h" -#include "drmP.h" -#include "drm.h" -#include "via_drm.h" -#include "via_verifier.h" -#include "via_drv.h" - -typedef enum { - state_command, - state_header2, - state_header1, - state_vheader5, - state_vheader6, - state_error -} verifier_state_t; - -typedef enum { - no_check = 0, - check_for_header2, - check_for_header1, - check_for_header2_err, - check_for_header1_err, - check_for_fire, - check_z_buffer_addr0, - check_z_buffer_addr1, - check_z_buffer_addr_mode, - check_destination_addr0, - check_destination_addr1, - check_destination_addr_mode, - check_for_dummy, - check_for_dd, - check_texture_addr0, - check_texture_addr1, - check_texture_addr2, - check_texture_addr3, - check_texture_addr4, - check_texture_addr5, - check_texture_addr6, - check_texture_addr7, - check_texture_addr8, - check_texture_addr_mode, - check_for_vertex_count, - check_number_texunits, - forbidden_command -} hazard_t; - -/* - * Associates each hazard above with a possible multi-command - * sequence. For example an address that is split over multiple - * commands and that needs to be checked at the first command - * that does not include any part of the address. - */ - -static drm_via_sequence_t seqs[] = { - no_sequence, - no_sequence, - no_sequence, - no_sequence, - no_sequence, - no_sequence, - z_address, - z_address, - z_address, - dest_address, - dest_address, - dest_address, - no_sequence, - no_sequence, - tex_address, - tex_address, - tex_address, - tex_address, - tex_address, - tex_address, - tex_address, - tex_address, - tex_address, - tex_address, - no_sequence -}; - -typedef struct { - unsigned int code; - hazard_t hz; -} hz_init_t; - -static hz_init_t init_table1[] = { - {0xf2, check_for_header2_err}, - {0xf0, check_for_header1_err}, - {0xee, check_for_fire}, - {0xcc, check_for_dummy}, - {0xdd, check_for_dd}, - {0x00, no_check}, - {0x10, check_z_buffer_addr0}, - {0x11, check_z_buffer_addr1}, - {0x12, check_z_buffer_addr_mode}, - {0x13, no_check}, - {0x14, no_check}, - {0x15, no_check}, - {0x23, no_check}, - {0x24, no_check}, - {0x33, no_check}, - {0x34, no_check}, - {0x35, no_check}, - {0x36, no_check}, - {0x37, no_check}, - {0x38, no_check}, - {0x39, no_check}, - {0x3A, no_check}, - {0x3B, no_check}, - {0x3C, no_check}, - {0x3D, no_check}, - {0x3E, no_check}, - {0x40, check_destination_addr0}, - {0x41, check_destination_addr1}, - {0x42, check_destination_addr_mode}, - {0x43, no_check}, - {0x44, no_check}, - {0x50, no_check}, - {0x51, no_check}, - {0x52, no_check}, - {0x53, no_check}, - {0x54, no_check}, - {0x55, no_check}, - {0x56, no_check}, - {0x57, no_check}, - {0x58, no_check}, - {0x70, no_check}, - {0x71, no_check}, - {0x78, no_check}, - {0x79, no_check}, - {0x7A, no_check}, - {0x7B, no_check}, - {0x7C, no_check}, - {0x7D, check_for_vertex_count} -}; - -static hz_init_t init_table2[] = { - {0xf2, check_for_header2_err}, - {0xf0, check_for_header1_err}, - {0xee, check_for_fire}, - {0xcc, check_for_dummy}, - {0x00, check_texture_addr0}, - {0x01, check_texture_addr0}, - {0x02, check_texture_addr0}, - {0x03, check_texture_addr0}, - {0x04, check_texture_addr0}, - {0x05, check_texture_addr0}, - {0x06, check_texture_addr0}, - {0x07, check_texture_addr0}, - {0x08, check_texture_addr0}, - {0x09, check_texture_addr0}, - {0x20, check_texture_addr1}, - {0x21, check_texture_addr1}, - {0x22, check_texture_addr1}, - {0x23, check_texture_addr4}, - {0x2B, check_texture_addr3}, - {0x2C, check_texture_addr3}, - {0x2D, check_texture_addr3}, - {0x2E, check_texture_addr3}, - {0x2F, check_texture_addr3}, - {0x30, check_texture_addr3}, - {0x31, check_texture_addr3}, - {0x32, check_texture_addr3}, - {0x33, check_texture_addr3}, - {0x34, check_texture_addr3}, - {0x4B, check_texture_addr5}, - {0x4C, check_texture_addr6}, - {0x51, check_texture_addr7}, - {0x52, check_texture_addr8}, - {0x77, check_texture_addr2}, - {0x78, no_check}, - {0x79, no_check}, - {0x7A, no_check}, - {0x7B, check_texture_addr_mode}, - {0x7C, no_check}, - {0x7D, no_check}, - {0x7E, no_check}, - {0x7F, no_check}, - {0x80, no_check}, - {0x81, no_check}, - {0x82, no_check}, - {0x83, no_check}, - {0x85, no_check}, - {0x86, no_check}, - {0x87, no_check}, - {0x88, no_check}, - {0x89, no_check}, - {0x8A, no_check}, - {0x90, no_check}, - {0x91, no_check}, - {0x92, no_check}, - {0x93, no_check} -}; - -static hz_init_t init_table3[] = { - {0xf2, check_for_header2_err}, - {0xf0, check_for_header1_err}, - {0xcc, check_for_dummy}, - {0x00, check_number_texunits} -}; - -static hazard_t table1[256]; -static hazard_t table2[256]; -static hazard_t table3[256]; - -static __inline__ int -eat_words(const uint32_t ** buf, const uint32_t * buf_end, unsigned num_words) -{ - if ((buf_end - *buf) >= num_words) { - *buf += num_words; - return 0; - } - DRM_ERROR("Illegal termination of DMA command buffer\n"); - return 1; -} - -/* - * Partially stolen from drm_memory.h - */ - -static __inline__ drm_local_map_t *via_drm_lookup_agp_map(drm_via_state_t *seq, - unsigned long offset, - unsigned long size, - struct drm_device * dev) -{ - struct drm_map_list *r_list; - drm_local_map_t *map = seq->map_cache; - - if (map && map->offset <= offset - && (offset + size) <= (map->offset + map->size)) { - return map; - } - - list_for_each_entry(r_list, &dev->maplist, head) { - map = r_list->map; - if (!map) - continue; - if (map->offset <= offset - && (offset + size) <= (map->offset + map->size) - && !(map->flags & _DRM_RESTRICTED) - && (map->type == _DRM_AGP)) { - seq->map_cache = map; - return map; - } - } - return NULL; -} - -/* - * Require that all AGP texture levels reside in the same AGP map which should - * be mappable by the client. This is not a big restriction. - * FIXME: To actually enforce this security policy strictly, drm_rmmap - * would have to wait for dma quiescent before removing an AGP map. - * The via_drm_lookup_agp_map call in reality seems to take - * very little CPU time. - */ - -static __inline__ int finish_current_sequence(drm_via_state_t * cur_seq) -{ - switch (cur_seq->unfinished) { - case z_address: - DRM_DEBUG("Z Buffer start address is 0x%x\n", cur_seq->z_addr); - break; - case dest_address: - DRM_DEBUG("Destination start address is 0x%x\n", - cur_seq->d_addr); - break; - case tex_address: - if (cur_seq->agp_texture) { - unsigned start = - cur_seq->tex_level_lo[cur_seq->texture]; - unsigned end = cur_seq->tex_level_hi[cur_seq->texture]; - unsigned long lo = ~0, hi = 0, tmp; - uint32_t *addr, *pitch, *height, tex; - unsigned i; - int npot; - - if (end > 9) - end = 9; - if (start > 9) - start = 9; - - addr = - &(cur_seq->t_addr[tex = cur_seq->texture][start]); - pitch = &(cur_seq->pitch[tex][start]); - height = &(cur_seq->height[tex][start]); - npot = cur_seq->tex_npot[tex]; - for (i = start; i <= end; ++i) { - tmp = *addr++; - if (tmp < lo) - lo = tmp; - if (i == 0 && npot) - tmp += (*height++ * *pitch++); - else - tmp += (*height++ << *pitch++); - if (tmp > hi) - hi = tmp; - } - - if (!via_drm_lookup_agp_map - (cur_seq, lo, hi - lo, cur_seq->dev)) { - DRM_ERROR - ("AGP texture is not in allowed map\n"); - return 2; - } - } - break; - default: - break; - } - cur_seq->unfinished = no_sequence; - return 0; -} - -static __inline__ int -investigate_hazard(uint32_t cmd, hazard_t hz, drm_via_state_t * cur_seq) -{ - register uint32_t tmp, *tmp_addr; - - if (cur_seq->unfinished && (cur_seq->unfinished != seqs[hz])) { - int ret; - if ((ret = finish_current_sequence(cur_seq))) - return ret; - } - - switch (hz) { - case check_for_header2: - if (cmd == HALCYON_HEADER2) - return 1; - return 0; - case check_for_header1: - if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1) - return 1; - return 0; - case check_for_header2_err: - if (cmd == HALCYON_HEADER2) - return 1; - DRM_ERROR("Illegal DMA HALCYON_HEADER2 command\n"); - break; - case check_for_header1_err: - if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1) - return 1; - DRM_ERROR("Illegal DMA HALCYON_HEADER1 command\n"); - break; - case check_for_fire: - if ((cmd & HALCYON_FIREMASK) == HALCYON_FIRECMD) - return 1; - DRM_ERROR("Illegal DMA HALCYON_FIRECMD command\n"); - break; - case check_for_dummy: - if (HC_DUMMY == cmd) - return 0; - DRM_ERROR("Illegal DMA HC_DUMMY command\n"); - break; - case check_for_dd: - if (0xdddddddd == cmd) - return 0; - DRM_ERROR("Illegal DMA 0xdddddddd command\n"); - break; - case check_z_buffer_addr0: - cur_seq->unfinished = z_address; - cur_seq->z_addr = (cur_seq->z_addr & 0xFF000000) | - (cmd & 0x00FFFFFF); - return 0; - case check_z_buffer_addr1: - cur_seq->unfinished = z_address; - cur_seq->z_addr = (cur_seq->z_addr & 0x00FFFFFF) | - ((cmd & 0xFF) << 24); - return 0; - case check_z_buffer_addr_mode: - cur_seq->unfinished = z_address; - if ((cmd & 0x0000C000) == 0) - return 0; - DRM_ERROR("Attempt to place Z buffer in system memory\n"); - return 2; - case check_destination_addr0: - cur_seq->unfinished = dest_address; - cur_seq->d_addr = (cur_seq->d_addr & 0xFF000000) | - (cmd & 0x00FFFFFF); - return 0; - case check_destination_addr1: - cur_seq->unfinished = dest_address; - cur_seq->d_addr = (cur_seq->d_addr & 0x00FFFFFF) | - ((cmd & 0xFF) << 24); - return 0; - case check_destination_addr_mode: - cur_seq->unfinished = dest_address; - if ((cmd & 0x0000C000) == 0) - return 0; - DRM_ERROR - ("Attempt to place 3D drawing buffer in system memory\n"); - return 2; - case check_texture_addr0: - cur_seq->unfinished = tex_address; - tmp = (cmd >> 24); - tmp_addr = &cur_seq->t_addr[cur_seq->texture][tmp]; - *tmp_addr = (*tmp_addr & 0xFF000000) | (cmd & 0x00FFFFFF); - return 0; - case check_texture_addr1: - cur_seq->unfinished = tex_address; - tmp = ((cmd >> 24) - 0x20); - tmp += tmp << 1; - tmp_addr = &cur_seq->t_addr[cur_seq->texture][tmp]; - *tmp_addr = (*tmp_addr & 0x00FFFFFF) | ((cmd & 0xFF) << 24); - tmp_addr++; - *tmp_addr = (*tmp_addr & 0x00FFFFFF) | ((cmd & 0xFF00) << 16); - tmp_addr++; - *tmp_addr = (*tmp_addr & 0x00FFFFFF) | ((cmd & 0xFF0000) << 8); - return 0; - case check_texture_addr2: - cur_seq->unfinished = tex_address; - cur_seq->tex_level_lo[tmp = cur_seq->texture] = cmd & 0x3F; - cur_seq->tex_level_hi[tmp] = (cmd & 0xFC0) >> 6; - return 0; - case check_texture_addr3: - cur_seq->unfinished = tex_address; - tmp = ((cmd >> 24) - HC_SubA_HTXnL0Pit); - if (tmp == 0 && - (cmd & HC_HTXnEnPit_MASK)) { - cur_seq->pitch[cur_seq->texture][tmp] = - (cmd & HC_HTXnLnPit_MASK); - cur_seq->tex_npot[cur_seq->texture] = 1; - } else { - cur_seq->pitch[cur_seq->texture][tmp] = - (cmd & HC_HTXnLnPitE_MASK) >> HC_HTXnLnPitE_SHIFT; - cur_seq->tex_npot[cur_seq->texture] = 0; - if (cmd & 0x000FFFFF) { - DRM_ERROR - ("Unimplemented texture level 0 pitch mode.\n"); - return 2; - } - } - return 0; - case check_texture_addr4: - cur_seq->unfinished = tex_address; - tmp_addr = &cur_seq->t_addr[cur_seq->texture][9]; - *tmp_addr = (*tmp_addr & 0x00FFFFFF) | ((cmd & 0xFF) << 24); - return 0; - case check_texture_addr5: - case check_texture_addr6: - cur_seq->unfinished = tex_address; - /* - * Texture width. We don't care since we have the pitch. - */ - return 0; - case check_texture_addr7: - cur_seq->unfinished = tex_address; - tmp_addr = &(cur_seq->height[cur_seq->texture][0]); - tmp_addr[5] = 1 << ((cmd & 0x00F00000) >> 20); - tmp_addr[4] = 1 << ((cmd & 0x000F0000) >> 16); - tmp_addr[3] = 1 << ((cmd & 0x0000F000) >> 12); - tmp_addr[2] = 1 << ((cmd & 0x00000F00) >> 8); - tmp_addr[1] = 1 << ((cmd & 0x000000F0) >> 4); - tmp_addr[0] = 1 << (cmd & 0x0000000F); - return 0; - case check_texture_addr8: - cur_seq->unfinished = tex_address; - tmp_addr = &(cur_seq->height[cur_seq->texture][0]); - tmp_addr[9] = 1 << ((cmd & 0x0000F000) >> 12); - tmp_addr[8] = 1 << ((cmd & 0x00000F00) >> 8); - tmp_addr[7] = 1 << ((cmd & 0x000000F0) >> 4); - tmp_addr[6] = 1 << (cmd & 0x0000000F); - return 0; - case check_texture_addr_mode: - cur_seq->unfinished = tex_address; - if (2 == (tmp = cmd & 0x00000003)) { - DRM_ERROR - ("Attempt to fetch texture from system memory.\n"); - return 2; - } - cur_seq->agp_texture = (tmp == 3); - cur_seq->tex_palette_size[cur_seq->texture] = - (cmd >> 16) & 0x000000007; - return 0; - case check_for_vertex_count: - cur_seq->vertex_count = cmd & 0x0000FFFF; - return 0; - case check_number_texunits: - cur_seq->multitex = (cmd >> 3) & 1; - return 0; - default: - DRM_ERROR("Illegal DMA data: 0x%x\n", cmd); - return 2; - } - return 2; -} - -static __inline__ int -via_check_prim_list(uint32_t const **buffer, const uint32_t * buf_end, - drm_via_state_t * cur_seq) -{ - drm_via_private_t *dev_priv = - (drm_via_private_t *) cur_seq->dev->dev_private; - uint32_t a_fire, bcmd, dw_count; - int ret = 0; - int have_fire; - const uint32_t *buf = *buffer; - - while (buf < buf_end) { - have_fire = 0; - if ((buf_end - buf) < 2) { - DRM_ERROR - ("Unexpected termination of primitive list.\n"); - ret = 1; - break; - } - if ((*buf & HC_ACMD_MASK) != HC_ACMD_HCmdB) - break; - bcmd = *buf++; - if ((*buf & HC_ACMD_MASK) != HC_ACMD_HCmdA) { - DRM_ERROR("Expected Vertex List A command, got 0x%x\n", - *buf); - ret = 1; - break; - } - a_fire = - *buf++ | HC_HPLEND_MASK | HC_HPMValidN_MASK | - HC_HE3Fire_MASK; - - /* - * How many dwords per vertex ? - */ - - if (cur_seq->agp && ((bcmd & (0xF << 11)) == 0)) { - DRM_ERROR("Illegal B command vertex data for AGP.\n"); - ret = 1; - break; - } - - dw_count = 0; - if (bcmd & (1 << 7)) - dw_count += (cur_seq->multitex) ? 2 : 1; - if (bcmd & (1 << 8)) - dw_count += (cur_seq->multitex) ? 2 : 1; - if (bcmd & (1 << 9)) - dw_count++; - if (bcmd & (1 << 10)) - dw_count++; - if (bcmd & (1 << 11)) - dw_count++; - if (bcmd & (1 << 12)) - dw_count++; - if (bcmd & (1 << 13)) - dw_count++; - if (bcmd & (1 << 14)) - dw_count++; - - while (buf < buf_end) { - if (*buf == a_fire) { - if (dev_priv->num_fire_offsets >= - VIA_FIRE_BUF_SIZE) { - DRM_ERROR("Fire offset buffer full.\n"); - ret = 1; - break; - } - dev_priv->fire_offsets[dev_priv-> - num_fire_offsets++] = - buf; - have_fire = 1; - buf++; - if (buf < buf_end && *buf == a_fire) - buf++; - break; - } - if ((*buf == HALCYON_HEADER2) || - ((*buf & HALCYON_FIREMASK) == HALCYON_FIRECMD)) { - DRM_ERROR("Missing Vertex Fire command, " - "Stray Vertex Fire command or verifier " - "lost sync.\n"); - ret = 1; - break; - } - if ((ret = eat_words(&buf, buf_end, dw_count))) - break; - } - if (buf >= buf_end && !have_fire) { - DRM_ERROR("Missing Vertex Fire command or verifier " - "lost sync.\n"); - ret = 1; - break; - } - if (cur_seq->agp && ((buf - cur_seq->buf_start) & 0x01)) { - DRM_ERROR("AGP Primitive list end misaligned.\n"); - ret = 1; - break; - } - } - *buffer = buf; - return ret; -} - -static __inline__ verifier_state_t -via_check_header2(uint32_t const **buffer, const uint32_t * buf_end, - drm_via_state_t * hc_state) -{ - uint32_t cmd; - int hz_mode; - hazard_t hz; - const uint32_t *buf = *buffer; - const hazard_t *hz_table; - - if ((buf_end - buf) < 2) { - DRM_ERROR - ("Illegal termination of DMA HALCYON_HEADER2 sequence.\n"); - return state_error; - } - buf++; - cmd = (*buf++ & 0xFFFF0000) >> 16; - - switch (cmd) { - case HC_ParaType_CmdVdata: - if (via_check_prim_list(&buf, buf_end, hc_state)) - return state_error; - *buffer = buf; - return state_command; - case HC_ParaType_NotTex: - hz_table = table1; - break; - case HC_ParaType_Tex: - hc_state->texture = 0; - hz_table = table2; - break; - case (HC_ParaType_Tex | (HC_SubType_Tex1 << 8)): - hc_state->texture = 1; - hz_table = table2; - break; - case (HC_ParaType_Tex | (HC_SubType_TexGeneral << 8)): - hz_table = table3; - break; - case HC_ParaType_Auto: - if (eat_words(&buf, buf_end, 2)) - return state_error; - *buffer = buf; - return state_command; - case (HC_ParaType_Palette | (HC_SubType_Stipple << 8)): - if (eat_words(&buf, buf_end, 32)) - return state_error; - *buffer = buf; - return state_command; - case (HC_ParaType_Palette | (HC_SubType_TexPalette0 << 8)): - case (HC_ParaType_Palette | (HC_SubType_TexPalette1 << 8)): - DRM_ERROR("Texture palettes are rejected because of " - "lack of info how to determine their size.\n"); - return state_error; - case (HC_ParaType_Palette | (HC_SubType_FogTable << 8)): - DRM_ERROR("Fog factor palettes are rejected because of " - "lack of info how to determine their size.\n"); - return state_error; - default: - - /* - * There are some unimplemented HC_ParaTypes here, that - * need to be implemented if the Mesa driver is extended. - */ - - DRM_ERROR("Invalid or unimplemented HALCYON_HEADER2 " - "DMA subcommand: 0x%x. Previous dword: 0x%x\n", - cmd, *(buf - 2)); - *buffer = buf; - return state_error; - } - - while (buf < buf_end) { - cmd = *buf++; - if ((hz = hz_table[cmd >> 24])) { - if ((hz_mode = investigate_hazard(cmd, hz, hc_state))) { - if (hz_mode == 1) { - buf--; - break; - } - return state_error; - } - } else if (hc_state->unfinished && - finish_current_sequence(hc_state)) { - return state_error; - } - } - if (hc_state->unfinished && finish_current_sequence(hc_state)) { - return state_error; - } - *buffer = buf; - return state_command; -} - -static __inline__ verifier_state_t -via_parse_header2(drm_via_private_t * dev_priv, uint32_t const **buffer, - const uint32_t * buf_end, int *fire_count) -{ - uint32_t cmd; - const uint32_t *buf = *buffer; - const uint32_t *next_fire; - int burst = 0; - - next_fire = dev_priv->fire_offsets[*fire_count]; - buf++; - cmd = (*buf & 0xFFFF0000) >> 16; - VIA_WRITE(HC_REG_TRANS_SET + HC_REG_BASE, *buf++); - switch (cmd) { - case HC_ParaType_CmdVdata: - while ((buf < buf_end) && - (*fire_count < dev_priv->num_fire_offsets) && - (*buf & HC_ACMD_MASK) == HC_ACMD_HCmdB) { - while (buf <= next_fire) { - VIA_WRITE(HC_REG_TRANS_SPACE + HC_REG_BASE + - (burst & 63), *buf++); - burst += 4; - } - if ((buf < buf_end) - && ((*buf & HALCYON_FIREMASK) == HALCYON_FIRECMD)) - buf++; - - if (++(*fire_count) < dev_priv->num_fire_offsets) - next_fire = dev_priv->fire_offsets[*fire_count]; - } - break; - default: - while (buf < buf_end) { - - if (*buf == HC_HEADER2 || - (*buf & HALCYON_HEADER1MASK) == HALCYON_HEADER1 || - (*buf & VIA_VIDEOMASK) == VIA_VIDEO_HEADER5 || - (*buf & VIA_VIDEOMASK) == VIA_VIDEO_HEADER6) - break; - - VIA_WRITE(HC_REG_TRANS_SPACE + HC_REG_BASE + - (burst & 63), *buf++); - burst += 4; - } - } - *buffer = buf; - return state_command; -} - -static __inline__ int verify_mmio_address(uint32_t address) -{ - if ((address > 0x3FF) && (address < 0xC00)) { - DRM_ERROR("Invalid VIDEO DMA command. " - "Attempt to access 3D- or command burst area.\n"); - return 1; - } else if ((address > 0xCFF) && (address < 0x1300)) { - DRM_ERROR("Invalid VIDEO DMA command. " - "Attempt to access PCI DMA area.\n"); - return 1; - } else if (address > 0x13FF) { - DRM_ERROR("Invalid VIDEO DMA command. " - "Attempt to access VGA registers.\n"); - return 1; - } - return 0; -} - -static __inline__ int -verify_video_tail(uint32_t const **buffer, const uint32_t * buf_end, - uint32_t dwords) -{ - const uint32_t *buf = *buffer; - - if (buf_end - buf < dwords) { - DRM_ERROR("Illegal termination of video command.\n"); - return 1; - } - while (dwords--) { - if (*buf++) { - DRM_ERROR("Illegal video command tail.\n"); - return 1; - } - } - *buffer = buf; - return 0; -} - -static __inline__ verifier_state_t -via_check_header1(uint32_t const **buffer, const uint32_t * buf_end) -{ - uint32_t cmd; - const uint32_t *buf = *buffer; - verifier_state_t ret = state_command; - - while (buf < buf_end) { - cmd = *buf; - if ((cmd > ((0x3FF >> 2) | HALCYON_HEADER1)) && - (cmd < ((0xC00 >> 2) | HALCYON_HEADER1))) { - if ((cmd & HALCYON_HEADER1MASK) != HALCYON_HEADER1) - break; - DRM_ERROR("Invalid HALCYON_HEADER1 command. " - "Attempt to access 3D- or command burst area.\n"); - ret = state_error; - break; - } else if (cmd > ((0xCFF >> 2) | HALCYON_HEADER1)) { - if ((cmd & HALCYON_HEADER1MASK) != HALCYON_HEADER1) - break; - DRM_ERROR("Invalid HALCYON_HEADER1 command. " - "Attempt to access VGA registers.\n"); - ret = state_error; - break; - } else { - buf += 2; - } - } - *buffer = buf; - return ret; -} - -static __inline__ verifier_state_t -via_parse_header1(drm_via_private_t * dev_priv, uint32_t const **buffer, - const uint32_t * buf_end) -{ - register uint32_t cmd; - const uint32_t *buf = *buffer; - - while (buf < buf_end) { - cmd = *buf; - if ((cmd & HALCYON_HEADER1MASK) != HALCYON_HEADER1) - break; - VIA_WRITE((cmd & ~HALCYON_HEADER1MASK) << 2, *++buf); - buf++; - } - *buffer = buf; - return state_command; -} - -static __inline__ verifier_state_t -via_check_vheader5(uint32_t const **buffer, const uint32_t * buf_end) -{ - uint32_t data; - const uint32_t *buf = *buffer; - - if (buf_end - buf < 4) { - DRM_ERROR("Illegal termination of video header5 command\n"); - return state_error; - } - - data = *buf++ & ~VIA_VIDEOMASK; - if (verify_mmio_address(data)) - return state_error; - - data = *buf++; - if (*buf++ != 0x00F50000) { - DRM_ERROR("Illegal header5 header data\n"); - return state_error; - } - if (*buf++ != 0x00000000) { - DRM_ERROR("Illegal header5 header data\n"); - return state_error; - } - if (eat_words(&buf, buf_end, data)) - return state_error; - if ((data & 3) && verify_video_tail(&buf, buf_end, 4 - (data & 3))) - return state_error; - *buffer = buf; - return state_command; - -} - -static __inline__ verifier_state_t -via_parse_vheader5(drm_via_private_t * dev_priv, uint32_t const **buffer, - const uint32_t * buf_end) -{ - uint32_t addr, count, i; - const uint32_t *buf = *buffer; - - addr = *buf++ & ~VIA_VIDEOMASK; - i = count = *buf; - buf += 3; - while (i--) { - VIA_WRITE(addr, *buf++); - } - if (count & 3) - buf += 4 - (count & 3); - *buffer = buf; - return state_command; -} - -static __inline__ verifier_state_t -via_check_vheader6(uint32_t const **buffer, const uint32_t * buf_end) -{ - uint32_t data; - const uint32_t *buf = *buffer; - uint32_t i; - - if (buf_end - buf < 4) { - DRM_ERROR("Illegal termination of video header6 command\n"); - return state_error; - } - buf++; - data = *buf++; - if (*buf++ != 0x00F60000) { - DRM_ERROR("Illegal header6 header data\n"); - return state_error; - } - if (*buf++ != 0x00000000) { - DRM_ERROR("Illegal header6 header data\n"); - return state_error; - } - if ((buf_end - buf) < (data << 1)) { - DRM_ERROR("Illegal termination of video header6 command\n"); - return state_error; - } - for (i = 0; i < data; ++i) { - if (verify_mmio_address(*buf++)) - return state_error; - buf++; - } - data <<= 1; - if ((data & 3) && verify_video_tail(&buf, buf_end, 4 - (data & 3))) - return state_error; - *buffer = buf; - return state_command; -} - -static __inline__ verifier_state_t -via_parse_vheader6(drm_via_private_t * dev_priv, uint32_t const **buffer, - const uint32_t * buf_end) -{ - - uint32_t addr, count, i; - const uint32_t *buf = *buffer; - - i = count = *++buf; - buf += 3; - while (i--) { - addr = *buf++; - VIA_WRITE(addr, *buf++); - } - count <<= 1; - if (count & 3) - buf += 4 - (count & 3); - *buffer = buf; - return state_command; -} - -int -via_verify_command_stream(const uint32_t * buf, unsigned int size, - struct drm_device * dev, int agp) -{ - - drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; - drm_via_state_t *hc_state = &dev_priv->hc_state; - drm_via_state_t saved_state = *hc_state; - uint32_t cmd; - const uint32_t *buf_end = buf + (size >> 2); - verifier_state_t state = state_command; - int cme_video; - int supported_3d; - - cme_video = (dev_priv->chipset == VIA_PRO_GROUP_A || - dev_priv->chipset == VIA_DX9_0); - - supported_3d = dev_priv->chipset != VIA_DX9_0; - - hc_state->dev = dev; - hc_state->unfinished = no_sequence; - hc_state->map_cache = NULL; - hc_state->agp = agp; - hc_state->buf_start = buf; - dev_priv->num_fire_offsets = 0; - - while (buf < buf_end) { - - switch (state) { - case state_header2: - state = via_check_header2(&buf, buf_end, hc_state); - break; - case state_header1: - state = via_check_header1(&buf, buf_end); - break; - case state_vheader5: - state = via_check_vheader5(&buf, buf_end); - break; - case state_vheader6: - state = via_check_vheader6(&buf, buf_end); - break; - case state_command: - if ((HALCYON_HEADER2 == (cmd = *buf)) && - supported_3d) - state = state_header2; - else if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1) - state = state_header1; - else if (cme_video - && (cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER5) - state = state_vheader5; - else if (cme_video - && (cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER6) - state = state_vheader6; - else if ((cmd == HALCYON_HEADER2) && !supported_3d) { - DRM_ERROR("Accelerated 3D is not supported on this chipset yet.\n"); - state = state_error; - } else { - DRM_ERROR - ("Invalid / Unimplemented DMA HEADER command. 0x%x\n", - cmd); - state = state_error; - } - break; - case state_error: - default: - *hc_state = saved_state; - return -EINVAL; - } - } - if (state == state_error) { - *hc_state = saved_state; - return -EINVAL; - } - return 0; -} - -int -via_parse_command_stream(struct drm_device * dev, const uint32_t * buf, - unsigned int size) -{ - - drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; - uint32_t cmd; - const uint32_t *buf_end = buf + (size >> 2); - verifier_state_t state = state_command; - int fire_count = 0; - - while (buf < buf_end) { - - switch (state) { - case state_header2: - state = - via_parse_header2(dev_priv, &buf, buf_end, - &fire_count); - break; - case state_header1: - state = via_parse_header1(dev_priv, &buf, buf_end); - break; - case state_vheader5: - state = via_parse_vheader5(dev_priv, &buf, buf_end); - break; - case state_vheader6: - state = via_parse_vheader6(dev_priv, &buf, buf_end); - break; - case state_command: - if (HALCYON_HEADER2 == (cmd = *buf)) - state = state_header2; - else if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1) - state = state_header1; - else if ((cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER5) - state = state_vheader5; - else if ((cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER6) - state = state_vheader6; - else { - DRM_ERROR - ("Invalid / Unimplemented DMA HEADER command. 0x%x\n", - cmd); - state = state_error; - } - break; - case state_error: - default: - return -EINVAL; - } - } - if (state == state_error) { - return -EINVAL; - } - return 0; -} - -static void -setup_hazard_table(hz_init_t init_table[], hazard_t table[], int size) -{ - int i; - - for (i = 0; i < 256; ++i) { - table[i] = forbidden_command; - } - - for (i = 0; i < size; ++i) { - table[init_table[i].code] = init_table[i].hz; - } -} - -void via_init_command_verifier(void) -{ - setup_hazard_table(init_table1, table1, - sizeof(init_table1) / sizeof(hz_init_t)); - setup_hazard_table(init_table2, table2, - sizeof(init_table2) / sizeof(hz_init_t)); - setup_hazard_table(init_table3, table3, - sizeof(init_table3) / sizeof(hz_init_t)); -} |