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drm/radeon: add fault decode function for cayman/TN (v2) 

Helpful for debugging GPUVM errors as we can see what
hw block and page generated the fault in the log.

v2: simplify fault decoding

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
Alex Deucher 2013-06-13 18:26:25 -04:00
parent 0a16893397
commit 54e2e49ce2
3 changed files with 185 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/gpu/drm/radeon/evergreen.c
View File

@ -139,6 +139,8 @@ void evergreen_pcie_gen2_enable(struct radeon_device *rdev);
void evergreen_program_aspm(struct radeon_device *rdev);
extern void cayman_cp_int_cntl_setup(struct radeon_device *rdev,
int ring, u32 cp_int_cntl);
extern void cayman_vm_decode_fault(struct radeon_device *rdev,
u32 status, u32 addr);
static const u32 evergreen_golden_registers[] =
{
@ -4586,6 +4588,7 @@ int evergreen_irq_process(struct radeon_device *rdev)
bool queue_hotplug = false;
bool queue_hdmi = false;
bool queue_thermal = false;
u32 status, addr;
if (!rdev->ih.enabled || rdev->shutdown)
return IRQ_NONE;
@ -4872,11 +4875,14 @@ restart_ih:
break;
case 146:
case 147:
addr = RREG32(VM_CONTEXT1_PROTECTION_FAULT_ADDR);
status = RREG32(VM_CONTEXT1_PROTECTION_FAULT_STATUS);
dev_err(rdev->dev, "GPU fault detected: %d 0x%08x\n", src_id, src_data);
dev_err(rdev->dev, " VM_CONTEXT1_PROTECTION_FAULT_ADDR 0x%08X\n",
RREG32(VM_CONTEXT1_PROTECTION_FAULT_ADDR));
addr);
dev_err(rdev->dev, " VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x%08X\n",
RREG32(VM_CONTEXT1_PROTECTION_FAULT_STATUS));
status);
cayman_vm_decode_fault(rdev, status, addr);
/* reset addr and status */
WREG32_P(VM_CONTEXT1_CNTL2, 1, ~1);
break;

161
drivers/gpu/drm/radeon/ni.c
View File

@ -2450,6 +2450,167 @@ void cayman_vm_fini(struct radeon_device *rdev)
{
}
/**
* cayman_vm_decode_fault - print human readable fault info
*
* @rdev: radeon_device pointer
* @status: VM_CONTEXT1_PROTECTION_FAULT_STATUS register value
* @addr: VM_CONTEXT1_PROTECTION_FAULT_ADDR register value
*
* Print human readable fault information (cayman/TN).
*/
void cayman_vm_decode_fault(struct radeon_device *rdev,
u32 status, u32 addr)
{
u32 mc_id = (status & MEMORY_CLIENT_ID_MASK) >> MEMORY_CLIENT_ID_SHIFT;
u32 vmid = (status & FAULT_VMID_MASK) >> FAULT_VMID_SHIFT;
u32 protections = (status & PROTECTIONS_MASK) >> PROTECTIONS_SHIFT;
char *block;
switch (mc_id) {
case 32:
case 16:
case 96:
case 80:
case 160:
case 144:
case 224:
case 208:
block = "CB";
break;
case 33:
case 17:
case 97:
case 81:
case 161:
case 145:
case 225:
case 209:
block = "CB_FMASK";
break;
case 34:
case 18:
case 98:
case 82:
case 162:
case 146:
case 226:
case 210:
block = "CB_CMASK";
break;
case 35:
case 19:
case 99:
case 83:
case 163:
case 147:
case 227:
case 211:
block = "CB_IMMED";
break;
case 36:
case 20:
case 100:
case 84:
case 164:
case 148:
case 228:
case 212:
block = "DB";
break;
case 37:
case 21:
case 101:
case 85:
case 165:
case 149:
case 229:
case 213:
block = "DB_HTILE";
break;
case 38:
case 22:
case 102:
case 86:
case 166:
case 150:
case 230:
case 214:
block = "SX";
break;
case 39:
case 23:
case 103:
case 87:
case 167:
case 151:
case 231:
case 215:
block = "DB_STEN";
break;
case 40:
case 24:
case 104:
case 88:
case 232:
case 216:
case 168:
case 152:
block = "TC_TFETCH";
break;
case 41:
case 25:
case 105:
case 89:
case 233:
case 217:
case 169:
case 153:
block = "TC_VFETCH";
break;
case 42:
case 26:
case 106:
case 90:
case 234:
case 218:
case 170:
case 154:
block = "VC";
break;
case 112:
block = "CP";
break;
case 113:
case 114:
block = "SH";
break;
case 115:
block = "VGT";
break;
case 178:
block = "IH";
break;
case 51:
block = "RLC";
break;
case 55:
block = "DMA";
break;
case 56:
block = "HDP";
break;
default:
block = "unknown";
break;
}
printk("VM fault (0x%02x, vmid %d) at page %u, %s from %s (%d)\n",
protections, vmid, addr,
(status & MEMORY_CLIENT_RW_MASK) ? "write" : "read",
block, mc_id);
}
#define R600_ENTRY_VALID (1 << 0)
#define R600_PTE_SYSTEM (1 << 1)
#define R600_PTE_SNOOPED (1 << 2)

16
drivers/gpu/drm/radeon/nid.h
View File

@ -133,6 +133,22 @@
#define VM_CONTEXT1_CNTL2 0x1434
#define VM_INVALIDATE_REQUEST 0x1478
#define VM_INVALIDATE_RESPONSE 0x147c
#define VM_CONTEXT1_PROTECTION_FAULT_ADDR 0x14FC
#define VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x14DC
#define PROTECTIONS_MASK (0xf << 0)
#define PROTECTIONS_SHIFT 0
/* bit 0: range
* bit 2: pde0
* bit 3: valid
* bit 4: read
* bit 5: write
*/
#define MEMORY_CLIENT_ID_MASK (0xff << 12)
#define MEMORY_CLIENT_ID_SHIFT 12
#define MEMORY_CLIENT_RW_MASK (1 << 24)
#define MEMORY_CLIENT_RW_SHIFT 24
#define FAULT_VMID_MASK (0x7 << 25)
#define FAULT_VMID_SHIFT 25
#define VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_ADDR 0x1518
#define VM_CONTEXT1_PROTECTION_FAULT_DEFAULT_ADDR 0x151c
#define VM_CONTEXT0_PAGE_TABLE_BASE_ADDR 0x153C