From 1f86805adc3432e92e7d87e1ff5da9826ef56eab Mon Sep 17 00:00:00 2001 From: Yong Zhao Date: Wed, 13 Feb 2019 13:15:05 -0500 Subject: drm/amdkfd: Fix bugs regarding CP queue doorbell mask on SOC15 Reserved doorbells for SDMA IH and VCN were not properly masked out when allocating doorbells for CP user queues. This patch fixed that. Signed-off-by: Yong Zhao Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 11 +++++++++++ drivers/gpu/drm/amd/amdkfd/kfd_process.c | 14 +++++++++----- 2 files changed, 20 insertions(+), 5 deletions(-) (limited to 'drivers/gpu/drm/amd/amdkfd') diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h index e5ebcca7f031..0eeee3c6d6dc 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h @@ -103,6 +103,17 @@ #define KFD_KERNEL_QUEUE_SIZE 2048 +/* + * 512 = 0x200 + * The doorbell index distance between SDMA RLC (2*i) and (2*i+1) in the + * same SDMA engine on SOC15, which has 8-byte doorbells for SDMA. + * 512 8-byte doorbell distance (i.e. one page away) ensures that SDMA RLC + * (2*i+1) doorbells (in terms of the lower 12 bit address) lie exactly in + * the OFFSET and SIZE set in registers like BIF_SDMA0_DOORBELL_RANGE. + */ +#define KFD_QUEUE_DOORBELL_MIRROR_OFFSET 512 + + /* * Kernel module parameter to specify maximum number of supported queues per * device diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c index 80b36e860a0a..4bdae78bab8e 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c @@ -607,13 +607,17 @@ static int init_doorbell_bitmap(struct qcm_process_device *qpd, if (!qpd->doorbell_bitmap) return -ENOMEM; - /* Mask out any reserved doorbells */ - for (i = 0; i < KFD_MAX_NUM_OF_QUEUES_PER_PROCESS; i++) - if ((dev->shared_resources.reserved_doorbell_mask & i) == - dev->shared_resources.reserved_doorbell_val) { + /* Mask out doorbells reserved for SDMA, IH, and VCN on SOC15. */ + for (i = 0; i < KFD_MAX_NUM_OF_QUEUES_PER_PROCESS / 2; i++) { + if (i >= dev->shared_resources.non_cp_doorbells_start + && i <= dev->shared_resources.non_cp_doorbells_end) { set_bit(i, qpd->doorbell_bitmap); - pr_debug("reserved doorbell 0x%03x\n", i); + set_bit(i + KFD_QUEUE_DOORBELL_MIRROR_OFFSET, + qpd->doorbell_bitmap); + pr_debug("reserved doorbell 0x%03x and 0x%03x\n", i, + i + KFD_QUEUE_DOORBELL_MIRROR_OFFSET); } + } return 0; } -- cgit v1.2.3