From c21b0fe6de3912f53087b4f3991942529f03eef6 Mon Sep 17 00:00:00 2001 From: Jerome Glisse Date: Tue, 2 Mar 2010 20:37:52 +0100 Subject: drm/radeon/kms: catch atombios infinite loop and break out of it In somecase the atombios code might lead to infinite loop because the GPU is in broken state, this patch track the jump history and will abort atombios execution if we are stuck executing the same jump for more than 1sec. Note that otherwise in some case we might enter an infinite loop in the kernel context which is bad. Signed-off-by: Jerome Glisse Signed-off-by: Dave Airlie --- drivers/gpu/drm/radeon/atom.c | 59 ++++++++++++++++++++++++++++++++++--------- 1 file changed, 47 insertions(+), 12 deletions(-) (limited to 'drivers/gpu/drm/radeon/atom.c') diff --git a/drivers/gpu/drm/radeon/atom.c b/drivers/gpu/drm/radeon/atom.c index d75788feac6c..b7fe660985c4 100644 --- a/drivers/gpu/drm/radeon/atom.c +++ b/drivers/gpu/drm/radeon/atom.c @@ -52,15 +52,17 @@ 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 void atom_execute_table_locked(struct atom_context *ctx, int index, uint32_t * params); -void atom_execute_table(struct atom_context *ctx, int index, uint32_t * params); +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, 0xFFFF, 0xFFFF00, 0xFFFF0000, 0xFF, 0xFF00, 0xFF0000, @@ -604,12 +606,17 @@ static void atom_op_beep(atom_exec_context *ctx, int *ptr, int arg) 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)) - atom_execute_table_locked(ctx->ctx, idx, ctx->ps + ctx->ps_shift); + 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) @@ -673,6 +680,8 @@ static void atom_op_eot(atom_exec_context *ctx, int *ptr, int arg) 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: @@ -700,8 +709,25 @@ static void atom_op_jump(atom_exec_context *ctx, int *ptr, int arg) if (arg != ATOM_COND_ALWAYS) SDEBUG(" taken: %s\n", execute ? "yes" : "no"); SDEBUG(" target: 0x%04X\n", target); - if (execute) + 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) > 1000)) { + DRM_ERROR("atombios stuck in loop for more than 1sec 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) @@ -1104,7 +1130,7 @@ static struct { atom_op_shr, ATOM_ARG_MC}, { atom_op_debug, 0},}; -static void atom_execute_table_locked(struct atom_context *ctx, int index, uint32_t * params) +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; @@ -1112,7 +1138,7 @@ static void atom_execute_table_locked(struct atom_context *ctx, int index, uint3 atom_exec_context ectx; if (!base) - return; + return -EINVAL; len = CU16(base + ATOM_CT_SIZE_PTR); ws = CU8(base + ATOM_CT_WS_PTR); @@ -1125,6 +1151,8 @@ static void atom_execute_table_locked(struct atom_context *ctx, int index, uint3 ectx.ps_shift = ps / 4; ectx.start = base; ectx.ps = params; + ectx.abort = false; + ectx.last_jump = 0; if (ws) ectx.ws = kzalloc(4 * ws, GFP_KERNEL); else @@ -1137,6 +1165,11 @@ static void atom_execute_table_locked(struct atom_context *ctx, int index, uint3 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); + return -EINVAL; + } if (op < ATOM_OP_CNT && op > 0) opcode_table[op].func(&ectx, &ptr, @@ -1152,10 +1185,13 @@ static void atom_execute_table_locked(struct atom_context *ctx, int index, uint3 if (ws) kfree(ectx.ws); + return 0; } -void atom_execute_table(struct atom_context *ctx, int index, uint32_t * params) +int atom_execute_table(struct atom_context *ctx, int index, uint32_t * params) { + int r; + mutex_lock(&ctx->mutex); /* reset reg block */ ctx->reg_block = 0; @@ -1163,8 +1199,9 @@ void atom_execute_table(struct atom_context *ctx, int index, uint32_t * params) ctx->fb_base = 0; /* reset io mode */ ctx->io_mode = ATOM_IO_MM; - atom_execute_table_locked(ctx, index, params); + r = atom_execute_table_locked(ctx, index, params); mutex_unlock(&ctx->mutex); + return r; } static int atom_iio_len[] = { 1, 2, 3, 3, 3, 3, 4, 4, 4, 3 }; @@ -1248,9 +1285,7 @@ int atom_asic_init(struct atom_context *ctx) if (!CU16(ctx->cmd_table + 4 + 2 * ATOM_CMD_INIT)) return 1; - atom_execute_table(ctx, ATOM_CMD_INIT, ps); - - return 0; + return atom_execute_table(ctx, ATOM_CMD_INIT, ps); } void atom_destroy(struct atom_context *ctx) -- cgit v1.2.3 From 5a0e3ad6af8660be21ca98a971cd00f331318c05 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 24 Mar 2010 17:04:11 +0900 Subject: include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo Guess-its-ok-by: Christoph Lameter Cc: Ingo Molnar Cc: Lee Schermerhorn --- drivers/gpu/drm/radeon/atom.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/gpu/drm/radeon/atom.c') diff --git a/drivers/gpu/drm/radeon/atom.c b/drivers/gpu/drm/radeon/atom.c index d75788feac6c..8538b88eda35 100644 --- a/drivers/gpu/drm/radeon/atom.c +++ b/drivers/gpu/drm/radeon/atom.c @@ -24,6 +24,7 @@ #include #include +#include #include #define ATOM_DEBUG -- cgit v1.2.3 From a084e6ee6e64a76f1a9665d527203cdab7d6048f Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Thu, 18 Mar 2010 01:04:01 -0400 Subject: drm/radeon/kms/atom: make sure tables are valid (v2) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Check that atom cmd and data tables are valid before using them. (v2) - fix some whitespace errors noticed by Rafał Miłecki - check a few more cases Signed-off-by: Alex Deucher Signed-off-by: Dave Airlie --- drivers/gpu/drm/radeon/atom.c | 32 ++++++++++++++++++++------------ 1 file changed, 20 insertions(+), 12 deletions(-) (limited to 'drivers/gpu/drm/radeon/atom.c') diff --git a/drivers/gpu/drm/radeon/atom.c b/drivers/gpu/drm/radeon/atom.c index b7fe660985c4..247f8ee7e940 100644 --- a/drivers/gpu/drm/radeon/atom.c +++ b/drivers/gpu/drm/radeon/atom.c @@ -1295,12 +1295,16 @@ void atom_destroy(struct atom_context *ctx) kfree(ctx); } -void atom_parse_data_header(struct atom_context *ctx, int index, +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); @@ -1309,38 +1313,42 @@ void atom_parse_data_header(struct atom_context *ctx, int index, if (crev) *crev = CU8(idx + 3); *data_start = idx; - return; + return true; } -void atom_parse_cmd_header(struct atom_context *ctx, int index, uint8_t * frev, +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; + return true; } int atom_allocate_fb_scratch(struct atom_context *ctx) { int index = GetIndexIntoMasterTable(DATA, VRAM_UsageByFirmware); uint16_t data_offset; - int usage_bytes; + int usage_bytes = 0; struct _ATOM_VRAM_USAGE_BY_FIRMWARE *firmware_usage; - atom_parse_data_header(ctx, index, NULL, NULL, NULL, &data_offset); + if (atom_parse_data_header(ctx, index, NULL, NULL, NULL, &data_offset)) { + firmware_usage = (struct _ATOM_VRAM_USAGE_BY_FIRMWARE *)(ctx->bios + data_offset); - firmware_usage = (struct _ATOM_VRAM_USAGE_BY_FIRMWARE *)(ctx->bios + data_offset); + DRM_DEBUG("atom firmware requested %08x %dkb\n", + firmware_usage->asFirmwareVramReserveInfo[0].ulStartAddrUsedByFirmware, + firmware_usage->asFirmwareVramReserveInfo[0].usFirmwareUseInKb); - DRM_DEBUG("atom firmware requested %08x %dkb\n", - firmware_usage->asFirmwareVramReserveInfo[0].ulStartAddrUsedByFirmware, - firmware_usage->asFirmwareVramReserveInfo[0].usFirmwareUseInKb); - - usage_bytes = firmware_usage->asFirmwareVramReserveInfo[0].usFirmwareUseInKb * 1024; + usage_bytes = firmware_usage->asFirmwareVramReserveInfo[0].usFirmwareUseInKb * 1024; + } if (usage_bytes == 0) usage_bytes = 20 * 1024; /* allocate some scratch memory */ -- cgit v1.2.3 From 01a356fd2a5f5e72e783312037ace05df4ab4e32 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Tue, 6 Apr 2010 10:55:33 +0000 Subject: drm/radeon/kms: small memory leak in atom exit code This is an unlikely memory leak, but we may as well fix it. It's easy to fix and every static checker will complain if we don't. Signed-off-by: Dan Carpenter Reviewed-by: Matt Turner Signed-off-by: Dave Airlie --- drivers/gpu/drm/radeon/atom.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'drivers/gpu/drm/radeon/atom.c') diff --git a/drivers/gpu/drm/radeon/atom.c b/drivers/gpu/drm/radeon/atom.c index 247f8ee7e940..58845e053b36 100644 --- a/drivers/gpu/drm/radeon/atom.c +++ b/drivers/gpu/drm/radeon/atom.c @@ -1136,6 +1136,7 @@ static int atom_execute_table_locked(struct atom_context *ctx, int index, uint32 int len, ws, ps, ptr; unsigned char op; atom_exec_context ectx; + int ret = 0; if (!base) return -EINVAL; @@ -1168,7 +1169,8 @@ static int atom_execute_table_locked(struct atom_context *ctx, int index, uint32 if (ectx.abort) { DRM_ERROR("atombios stuck executing %04X (len %d, WS %d, PS %d) @ 0x%04X\n", base, len, ws, ps, ptr - 1); - return -EINVAL; + ret = -EINVAL; + goto free; } if (op < ATOM_OP_CNT && op > 0) @@ -1183,9 +1185,10 @@ static int atom_execute_table_locked(struct atom_context *ctx, int index, uint32 debug_depth--; SDEBUG("<<\n"); +free: if (ws) kfree(ectx.ws); - return 0; + return ret; } int atom_execute_table(struct atom_context *ctx, int index, uint32_t * params) -- cgit v1.2.3