<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> <style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style> </head> <body dir="ltr"> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> Please discard this one and look for an update version.</div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> Regards,</div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> Yong</div> <div id="appendonsend"></div> <hr style="display:inline-block;width:98%" tabindex="-1"> <div id="divRplyFwdMsg" dir="ltr">From: Zhao, Yong <Yong.Zhao@amd.com> Sent: Friday, November 1, 2019 4:11 PM To: amd-gfx@lists.freedesktop.org <amd-gfx@lists.freedesktop.org> Cc: Zhao, Yong <Yong.Zhao@amd.com> Subject: [PATCH] drm/amdkfd: Simplify the mmap offset related bit operations <div> </div> </div> <div class="BodyFragment"> <div class="PlainText">The new code is much cleaner and results in better readability. Change-Id: I0c1f7cca7e24ddb7b4ffe1cb0fa71943828ae373 Signed-off-by: Yong Zhao <Yong.Zhao@amd.com> --- drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 10 ++++------ drivers/gpu/drm/amd/amdkfd/kfd_events.c | 1 - drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 9 +++------ drivers/gpu/drm/amd/amdkfd/kfd_process.c | 3 +-- 4 files changed, 8 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c index b91993753b82..34078df36621 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c @@ -298,7 +298,6 @@ static int kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p, /* Return gpu_id as doorbell offset for mmap usage */ args->doorbell_offset = KFD_MMAP_TYPE_DOORBELL; args->doorbell_offset |= KFD_MMAP_GPU_ID(args->gpu_id); - args->doorbell_offset <<= PAGE_SHIFT; if (KFD_IS_SOC15(dev->device_info->asic_family)) /* On SOC15 ASICs, include the doorbell offset within the * process doorbell frame, which could be 1 page or 2 pages. @@ -1938,20 +1937,19 @@ static int kfd_mmap(struct file *filp, struct vm_area_struct *vma) { struct kfd_process *process; struct kfd_dev *dev = NULL; - unsigned long vm_pgoff; + unsigned long mmap_offset; unsigned int gpu_id; process = kfd_get_process(current); if (IS_ERR(process)) return PTR_ERR(process); - vm_pgoff = vma->vm_pgoff; - vma->vm_pgoff = KFD_MMAP_OFFSET_VALUE_GET(vm_pgoff); - gpu_id = KFD_MMAP_GPU_ID_GET(vm_pgoff); + mmap_offset = vma->vm_pgoff << PAGE_SHIFT; + gpu_id = KFD_MMAP_GET_GPU_ID(mmap_offset); if (gpu_id) dev = kfd_device_by_id(gpu_id); - switch (vm_pgoff & KFD_MMAP_TYPE_MASK) { + switch (mmap_offset & KFD_MMAP_TYPE_MASK) { case KFD_MMAP_TYPE_DOORBELL: if (!dev) return -ENODEV; diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_events.c b/drivers/gpu/drm/amd/amdkfd/kfd_events.c index 908081c85de1..1f8365575b12 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_events.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_events.c @@ -346,7 +346,6 @@ int kfd_event_create(struct file *devkfd, struct kfd_process *p, ret = create_signal_event(devkfd, p, ev); if (!ret) { *event_page_offset = KFD_MMAP_TYPE_EVENTS; - *event_page_offset <<= PAGE_SHIFT; *event_slot_index = ev->event_id; } break; diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h index 66bae8f2dad1..8eecd2cd1fd2 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h @@ -59,24 +59,21 @@ * NOTE: struct vm_area_struct.vm_pgoff uses offset in pages. Hence, these * defines are w.r.t to PAGE_SIZE */ -#define KFD_MMAP_TYPE_SHIFT (62 - PAGE_SHIFT) +#define KFD_MMAP_TYPE_SHIFT (62) #define KFD_MMAP_TYPE_MASK (0x3ULL << KFD_MMAP_TYPE_SHIFT) #define KFD_MMAP_TYPE_DOORBELL (0x3ULL << KFD_MMAP_TYPE_SHIFT) #define KFD_MMAP_TYPE_EVENTS (0x2ULL << KFD_MMAP_TYPE_SHIFT) #define KFD_MMAP_TYPE_RESERVED_MEM (0x1ULL << KFD_MMAP_TYPE_SHIFT) #define KFD_MMAP_TYPE_MMIO (0x0ULL << KFD_MMAP_TYPE_SHIFT) -#define KFD_MMAP_GPU_ID_SHIFT (46 - PAGE_SHIFT) +#define KFD_MMAP_GPU_ID_SHIFT (46) #define KFD_MMAP_GPU_ID_MASK (((1ULL << KFD_GPU_ID_HASH_WIDTH) - 1) \ << KFD_MMAP_GPU_ID_SHIFT) #define KFD_MMAP_GPU_ID(gpu_id) ((((uint64_t)gpu_id) << KFD_MMAP_GPU_ID_SHIFT)\ & KFD_MMAP_GPU_ID_MASK) -#define KFD_MMAP_GPU_ID_GET(offset) ((offset & KFD_MMAP_GPU_ID_MASK) \ +#define KFD_MMAP_GET_GPU_ID(offset) ((offset & KFD_MMAP_GPU_ID_MASK) \ >> KFD_MMAP_GPU_ID_SHIFT) -#define KFD_MMAP_OFFSET_VALUE_MASK (0x3FFFFFFFFFFFULL >> PAGE_SHIFT) -#define KFD_MMAP_OFFSET_VALUE_GET(offset) (offset & KFD_MMAP_OFFSET_VALUE_MASK) - /* * When working with cp scheduler we should assign the HIQ manually or via * the amdgpu driver to a fixed hqd slot, here are the fixed HIQ hqd slot diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c index 6abfb77ae540..39dc49b8fd85 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c @@ -554,8 +554,7 @@ static int kfd_process_init_cwsr_apu(struct kfd_process *p, struct file *filep) if (!dev->cwsr_enabled || qpd->cwsr_kaddr || qpd->cwsr_base) continue; - offset = (KFD_MMAP_TYPE_RESERVED_MEM | KFD_MMAP_GPU_ID(dev->id)) - << PAGE_SHIFT; + offset = KFD_MMAP_TYPE_RESERVED_MEM | KFD_MMAP_GPU_ID(dev->id); qpd->tba_addr = (int64_t)vm_mmap(filep, 0, KFD_CWSR_TBA_TMA_SIZE, PROT_READ | PROT_EXEC, MAP_SHARED, offset); -- 2.17.1 </div> </div> </body> </html>