| /* |
| * 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 - buf_end) >= 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_map_t *via_drm_lookup_agp_map(drm_via_state_t * seq, |
| unsigned long offset, |
| unsigned long size, |
| drm_device_t * dev) |
| { |
| struct list_head *list; |
| drm_map_list_t *r_list; |
| drm_map_t *map = seq->map_cache; |
| |
| if (map && map->offset <= offset |
| && (offset + size) <= (map->offset + map->size)) { |
| return map; |
| } |
| |
| list_for_each(list, &dev->maplist->head) { |
| r_list = (drm_map_list_t *) list; |
| 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; |
| |
| 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]); |
| |
| for (i = start; i <= end; ++i) { |
| tmp = *addr++; |
| if (tmp < lo) |
| lo = tmp; |
| 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) - 0x2B); |
| cur_seq->pitch[cur_seq->texture][tmp] = |
| (cmd & 0x00F00000) >> 20; |
| if (!tmp && (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, |
| drm_device_t * 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 pro_group_a = dev_priv->pro_group_a; |
| |
| 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)) |
| state = state_header2; |
| else if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1) |
| state = state_header1; |
| else if (pro_group_a |
| && (cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER5) |
| state = state_vheader5; |
| else if (pro_group_a |
| && (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: |
| *hc_state = saved_state; |
| return DRM_ERR(EINVAL); |
| } |
| } |
| if (state == state_error) { |
| *hc_state = saved_state; |
| return DRM_ERR(EINVAL); |
| } |
| return 0; |
| } |
| |
| int |
| via_parse_command_stream(drm_device_t * 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 DRM_ERR(EINVAL); |
| } |
| } |
| if (state == state_error) { |
| return DRM_ERR(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)); |
| } |
