[PATCH v2 2/8] drm/etnaviv: split out cmdbuf mapping into address space
Lucas Stach
l.stach at pengutronix.de
Fri Jul 5 17:17:21 UTC 2019
This allows to decouple the cmdbuf suballocator create and mapping
the region into the GPU address space. Allowing multiple AS to share
a single cmdbuf suballoc.
Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
---
drivers/gpu/drm/etnaviv/etnaviv_buffer.c | 23 ++++----
drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.c | 35 ++++++------
drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.h | 11 +++-
drivers/gpu/drm/etnaviv/etnaviv_dump.c | 6 +-
drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 19 +++++--
drivers/gpu/drm/etnaviv/etnaviv_gpu.h | 3 +-
drivers/gpu/drm/etnaviv/etnaviv_mmu.c | 70 +++++++++++++++---------
drivers/gpu/drm/etnaviv/etnaviv_mmu.h | 12 ++--
8 files changed, 114 insertions(+), 65 deletions(-)
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_buffer.c b/drivers/gpu/drm/etnaviv/etnaviv_buffer.c
index fe0d2d67007d..6400a88cd778 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_buffer.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_buffer.c
@@ -118,7 +118,8 @@ static void etnaviv_buffer_dump(struct etnaviv_gpu *gpu,
u32 *ptr = buf->vaddr + off;
dev_info(gpu->dev, "virt %p phys 0x%08x free 0x%08x\n",
- ptr, etnaviv_cmdbuf_get_va(buf) + off, size - len * 4 - off);
+ ptr, etnaviv_cmdbuf_get_va(buf, &gpu->cmdbuf_mapping) +
+ off, size - len * 4 - off);
print_hex_dump(KERN_INFO, "cmd ", DUMP_PREFIX_OFFSET, 16, 4,
ptr, len * 4, 0);
@@ -151,7 +152,8 @@ static u32 etnaviv_buffer_reserve(struct etnaviv_gpu *gpu,
if (buffer->user_size + cmd_dwords * sizeof(u64) > buffer->size)
buffer->user_size = 0;
- return etnaviv_cmdbuf_get_va(buffer) + buffer->user_size;
+ return etnaviv_cmdbuf_get_va(buffer, &gpu->cmdbuf_mapping) +
+ buffer->user_size;
}
u16 etnaviv_buffer_init(struct etnaviv_gpu *gpu)
@@ -164,8 +166,8 @@ u16 etnaviv_buffer_init(struct etnaviv_gpu *gpu)
buffer->user_size = 0;
CMD_WAIT(buffer);
- CMD_LINK(buffer, 2, etnaviv_cmdbuf_get_va(buffer) +
- buffer->user_size - 4);
+ CMD_LINK(buffer, 2, etnaviv_cmdbuf_get_va(buffer, &gpu->cmdbuf_mapping)
+ + buffer->user_size - 4);
return buffer->user_size / 8;
}
@@ -291,8 +293,8 @@ void etnaviv_sync_point_queue(struct etnaviv_gpu *gpu, unsigned int event)
/* Append waitlink */
CMD_WAIT(buffer);
- CMD_LINK(buffer, 2, etnaviv_cmdbuf_get_va(buffer) +
- buffer->user_size - 4);
+ CMD_LINK(buffer, 2, etnaviv_cmdbuf_get_va(buffer, &gpu->cmdbuf_mapping)
+ + buffer->user_size - 4);
/*
* Kick off the 'sync point' command by replacing the previous
@@ -319,7 +321,7 @@ void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, u32 exec_state,
if (drm_debug & DRM_UT_DRIVER)
etnaviv_buffer_dump(gpu, buffer, 0, 0x50);
- link_target = etnaviv_cmdbuf_get_va(cmdbuf);
+ link_target = etnaviv_cmdbuf_get_va(cmdbuf, &gpu->cmdbuf_mapping);
link_dwords = cmdbuf->size / 8;
/*
@@ -412,12 +414,13 @@ void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, u32 exec_state,
CMD_LOAD_STATE(buffer, VIVS_GL_EVENT, VIVS_GL_EVENT_EVENT_ID(event) |
VIVS_GL_EVENT_FROM_PE);
CMD_WAIT(buffer);
- CMD_LINK(buffer, 2, etnaviv_cmdbuf_get_va(buffer) +
- buffer->user_size - 4);
+ CMD_LINK(buffer, 2, etnaviv_cmdbuf_get_va(buffer, &gpu->cmdbuf_mapping)
+ + buffer->user_size - 4);
if (drm_debug & DRM_UT_DRIVER)
pr_info("stream link to 0x%08x @ 0x%08x %p\n",
- return_target, etnaviv_cmdbuf_get_va(cmdbuf),
+ return_target,
+ etnaviv_cmdbuf_get_va(cmdbuf, &gpu->cmdbuf_mapping),
cmdbuf->vaddr);
if (drm_debug & DRM_UT_DRIVER) {
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.c b/drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.c
index 7b77992f31c4..8915d9d056a6 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.c
@@ -8,6 +8,7 @@
#include <drm/drm_mm.h>
#include "etnaviv_cmdbuf.h"
+#include "etnaviv_gem.h"
#include "etnaviv_gpu.h"
#include "etnaviv_mmu.h"
@@ -21,10 +22,6 @@ struct etnaviv_cmdbuf_suballoc {
void *vaddr;
dma_addr_t paddr;
- /* GPU mapping */
- u32 iova;
- struct drm_mm_node vram_node; /* only used on MMUv2 */
-
/* allocation management */
struct mutex lock;
DECLARE_BITMAP(granule_map, SUBALLOC_GRANULES);
@@ -53,26 +50,31 @@ etnaviv_cmdbuf_suballoc_new(struct etnaviv_gpu * gpu)
goto free_suballoc;
}
- ret = etnaviv_iommu_get_suballoc_va(gpu, suballoc->paddr,
- &suballoc->vram_node, SUBALLOC_SIZE,
- &suballoc->iova);
- if (ret)
- goto free_dma;
-
return suballoc;
-free_dma:
- dma_free_wc(gpu->dev, SUBALLOC_SIZE, suballoc->vaddr, suballoc->paddr);
free_suballoc:
kfree(suballoc);
return ERR_PTR(ret);
}
+int etnaviv_cmdbuf_suballoc_map(struct etnaviv_cmdbuf_suballoc *suballoc,
+ struct etnaviv_iommu *mmu,
+ struct etnaviv_vram_mapping *mapping,
+ u32 memory_base)
+{
+ return etnaviv_iommu_get_suballoc_va(mmu, mapping, memory_base,
+ suballoc->paddr, SUBALLOC_SIZE);
+}
+
+void etnaviv_cmdbuf_suballoc_unmap(struct etnaviv_iommu *mmu,
+ struct etnaviv_vram_mapping *mapping)
+{
+ etnaviv_iommu_put_suballoc_va(mmu, mapping);
+}
+
void etnaviv_cmdbuf_suballoc_destroy(struct etnaviv_cmdbuf_suballoc *suballoc)
{
- etnaviv_iommu_put_suballoc_va(suballoc->gpu, &suballoc->vram_node,
- SUBALLOC_SIZE, suballoc->iova);
dma_free_wc(suballoc->gpu->dev, SUBALLOC_SIZE, suballoc->vaddr,
suballoc->paddr);
kfree(suballoc);
@@ -126,9 +128,10 @@ void etnaviv_cmdbuf_free(struct etnaviv_cmdbuf *cmdbuf)
wake_up_all(&suballoc->free_event);
}
-u32 etnaviv_cmdbuf_get_va(struct etnaviv_cmdbuf *buf)
+u32 etnaviv_cmdbuf_get_va(struct etnaviv_cmdbuf *buf,
+ struct etnaviv_vram_mapping *mapping)
{
- return buf->suballoc->iova + buf->suballoc_offset;
+ return mapping->iova + buf->suballoc_offset;
}
dma_addr_t etnaviv_cmdbuf_get_pa(struct etnaviv_cmdbuf *buf)
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.h b/drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.h
index 49908797456e..11d95f05c017 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.h
@@ -9,6 +9,8 @@
#include <linux/types.h>
struct etnaviv_gpu;
+struct etnaviv_iommu;
+struct etnaviv_vram_mapping;
struct etnaviv_cmdbuf_suballoc;
struct etnaviv_cmdbuf {
@@ -24,13 +26,20 @@ struct etnaviv_cmdbuf {
struct etnaviv_cmdbuf_suballoc *
etnaviv_cmdbuf_suballoc_new(struct etnaviv_gpu * gpu);
void etnaviv_cmdbuf_suballoc_destroy(struct etnaviv_cmdbuf_suballoc *suballoc);
+int etnaviv_cmdbuf_suballoc_map(struct etnaviv_cmdbuf_suballoc *suballoc,
+ struct etnaviv_iommu *mmu,
+ struct etnaviv_vram_mapping *mapping,
+ u32 memory_base);
+void etnaviv_cmdbuf_suballoc_unmap(struct etnaviv_iommu *mmu,
+ struct etnaviv_vram_mapping *mapping);
int etnaviv_cmdbuf_init(struct etnaviv_cmdbuf_suballoc *suballoc,
struct etnaviv_cmdbuf *cmdbuf, u32 size);
void etnaviv_cmdbuf_free(struct etnaviv_cmdbuf *cmdbuf);
-u32 etnaviv_cmdbuf_get_va(struct etnaviv_cmdbuf *buf);
+u32 etnaviv_cmdbuf_get_va(struct etnaviv_cmdbuf *buf,
+ struct etnaviv_vram_mapping *mapping);
dma_addr_t etnaviv_cmdbuf_get_pa(struct etnaviv_cmdbuf *buf);
#endif /* __ETNAVIV_CMDBUF_H__ */
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_dump.c b/drivers/gpu/drm/etnaviv/etnaviv_dump.c
index 0aa8cde68593..13a63d9dcf54 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_dump.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_dump.c
@@ -173,11 +173,13 @@ void etnaviv_core_dump(struct etnaviv_gem_submit *submit)
etnaviv_core_dump_mem(&iter, ETDUMP_BUF_RING, gpu->buffer.vaddr,
gpu->buffer.size,
- etnaviv_cmdbuf_get_va(&gpu->buffer));
+ etnaviv_cmdbuf_get_va(&gpu->buffer,
+ &gpu->cmdbuf_mapping));
etnaviv_core_dump_mem(&iter, ETDUMP_BUF_CMD,
submit->cmdbuf.vaddr, submit->cmdbuf.size,
- etnaviv_cmdbuf_get_va(&submit->cmdbuf));
+ etnaviv_cmdbuf_get_va(&submit->cmdbuf,
+ &gpu->cmdbuf_mapping));
/* Reserve space for the bomap */
if (n_bomap_pages) {
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index e84a0ed904aa..62a38a63e4eb 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -687,8 +687,8 @@ static void etnaviv_gpu_hw_init(struct etnaviv_gpu *gpu)
prefetch = etnaviv_buffer_init(gpu);
gpu_write(gpu, VIVS_HI_INTR_ENBL, ~0U);
- etnaviv_gpu_start_fe(gpu, etnaviv_cmdbuf_get_va(&gpu->buffer),
- prefetch);
+ etnaviv_gpu_start_fe(gpu, etnaviv_cmdbuf_get_va(&gpu->buffer,
+ &gpu->cmdbuf_mapping), prefetch);
}
int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
@@ -767,16 +767,24 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
goto destroy_iommu;
}
+ ret = etnaviv_cmdbuf_suballoc_map(gpu->cmdbuf_suballoc, gpu->mmu,
+ &gpu->cmdbuf_mapping,
+ gpu->memory_base);
+ if (ret) {
+ dev_err(gpu->dev, "failed to map cmdbuf suballoc\n");
+ goto destroy_suballoc;
+ }
+
/* Create buffer: */
ret = etnaviv_cmdbuf_init(gpu->cmdbuf_suballoc, &gpu->buffer,
PAGE_SIZE);
if (ret) {
dev_err(gpu->dev, "could not create command buffer\n");
- goto destroy_suballoc;
+ goto unmap_suballoc;
}
if (gpu->mmu->version == ETNAVIV_IOMMU_V1 &&
- etnaviv_cmdbuf_get_va(&gpu->buffer) > 0x80000000) {
+ etnaviv_cmdbuf_get_va(&gpu->buffer, &gpu->cmdbuf_mapping) > 0x80000000) {
ret = -EINVAL;
dev_err(gpu->dev,
"command buffer outside valid memory window\n");
@@ -805,6 +813,8 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
free_buffer:
etnaviv_cmdbuf_free(&gpu->buffer);
+unmap_suballoc:
+ etnaviv_cmdbuf_suballoc_unmap(gpu->mmu, &gpu->cmdbuf_mapping);
destroy_suballoc:
etnaviv_cmdbuf_suballoc_destroy(gpu->cmdbuf_suballoc);
destroy_iommu:
@@ -1681,6 +1691,7 @@ static void etnaviv_gpu_unbind(struct device *dev, struct device *master,
if (gpu->initialized) {
etnaviv_cmdbuf_free(&gpu->buffer);
+ etnaviv_cmdbuf_suballoc_unmap(gpu->mmu, &gpu->cmdbuf_mapping);
etnaviv_cmdbuf_suballoc_destroy(gpu->cmdbuf_suballoc);
etnaviv_iommu_destroy(gpu->mmu);
gpu->initialized = false;
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
index b06c7c98d522..6a6add350d2d 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
@@ -7,6 +7,7 @@
#define __ETNAVIV_GPU_H__
#include "etnaviv_cmdbuf.h"
+#include "etnaviv_gem.h"
#include "etnaviv_drv.h"
struct etnaviv_gem_submit;
@@ -84,7 +85,6 @@ struct etnaviv_event {
};
struct etnaviv_cmdbuf_suballoc;
-struct etnaviv_cmdbuf;
struct regulator;
struct clk;
@@ -102,6 +102,7 @@ struct etnaviv_gpu {
bool initialized;
/* 'ring'-buffer: */
+ struct etnaviv_vram_mapping cmdbuf_mapping;
struct etnaviv_cmdbuf buffer;
int exec_state;
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
index 731275999a57..dd81376724d7 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
@@ -334,52 +334,72 @@ void etnaviv_iommu_restore(struct etnaviv_gpu *gpu)
etnaviv_iommuv2_restore(gpu);
}
-int etnaviv_iommu_get_suballoc_va(struct etnaviv_gpu *gpu, dma_addr_t paddr,
- struct drm_mm_node *vram_node, size_t size,
- u32 *iova)
+int etnaviv_iommu_get_suballoc_va(struct etnaviv_iommu *mmu,
+ struct etnaviv_vram_mapping *mapping,
+ u32 memory_base, dma_addr_t paddr,
+ size_t size)
{
- struct etnaviv_iommu *mmu = gpu->mmu;
+ mutex_lock(&mmu->lock);
+ /*
+ * For MMUv1 we don't add the suballoc region to the pagetables, as
+ * those GPUs can only work with cmdbufs accessed through the linear
+ * window. Instead we manufacture a mapping to make it look uniform
+ * to the upper layers.
+ */
if (mmu->version == ETNAVIV_IOMMU_V1) {
- *iova = paddr - gpu->memory_base;
- return 0;
+ mapping->iova = paddr - memory_base;
+ list_add_tail(&mapping->mmu_node, &mmu->mappings);
} else {
+ struct drm_mm_node *node = &mapping->vram_node;
int ret;
- mutex_lock(&mmu->lock);
- ret = etnaviv_iommu_find_iova(mmu, vram_node, size);
+ ret = etnaviv_iommu_find_iova(mmu, node, size);
if (ret < 0) {
mutex_unlock(&mmu->lock);
return ret;
}
- ret = etnaviv_domain_map(mmu->domain, vram_node->start, paddr,
- size, ETNAVIV_PROT_READ);
+
+ mapping->iova = node->start;
+ ret = etnaviv_domain_map(mmu->domain, node->start, paddr, size,
+ ETNAVIV_PROT_READ);
+
if (ret < 0) {
- drm_mm_remove_node(vram_node);
+ drm_mm_remove_node(node);
mutex_unlock(&mmu->lock);
return ret;
}
- gpu->mmu->need_flush = true;
- mutex_unlock(&mmu->lock);
- *iova = (u32)vram_node->start;
- return 0;
+ list_add_tail(&mapping->mmu_node, &mmu->mappings);
+ mmu->need_flush = true;
}
+
+ mapping->use = 1;
+
+ mutex_unlock(&mmu->lock);
+
+ return 0;
}
-void etnaviv_iommu_put_suballoc_va(struct etnaviv_gpu *gpu,
- struct drm_mm_node *vram_node, size_t size,
- u32 iova)
+void etnaviv_iommu_put_suballoc_va(struct etnaviv_iommu *mmu,
+ struct etnaviv_vram_mapping *mapping)
{
- struct etnaviv_iommu *mmu = gpu->mmu;
+ struct drm_mm_node *node = &mapping->vram_node;
- if (mmu->version == ETNAVIV_IOMMU_V2) {
- mutex_lock(&mmu->lock);
- etnaviv_domain_unmap(mmu->domain, iova, size);
- drm_mm_remove_node(vram_node);
- mutex_unlock(&mmu->lock);
- }
+ if (!mapping->use)
+ return;
+
+ mapping->use = 0;
+
+ if (mmu->version == ETNAVIV_IOMMU_V1)
+ return;
+
+ mutex_lock(&mmu->lock);
+ etnaviv_domain_unmap(mmu->domain, node->start, node->size);
+ drm_mm_remove_node(node);
+ mutex_unlock(&mmu->lock);
}
+
size_t etnaviv_iommu_dump_size(struct etnaviv_iommu *iommu)
{
return iommu->domain->ops->dump_size(iommu->domain);
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_mmu.h b/drivers/gpu/drm/etnaviv/etnaviv_mmu.h
index a0db17ffb686..fe1c9d6b9334 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_mmu.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.h
@@ -59,12 +59,12 @@ int etnaviv_iommu_map_gem(struct etnaviv_iommu *mmu,
void etnaviv_iommu_unmap_gem(struct etnaviv_iommu *mmu,
struct etnaviv_vram_mapping *mapping);
-int etnaviv_iommu_get_suballoc_va(struct etnaviv_gpu *gpu, dma_addr_t paddr,
- struct drm_mm_node *vram_node, size_t size,
- u32 *iova);
-void etnaviv_iommu_put_suballoc_va(struct etnaviv_gpu *gpu,
- struct drm_mm_node *vram_node, size_t size,
- u32 iova);
+int etnaviv_iommu_get_suballoc_va(struct etnaviv_iommu *mmu,
+ struct etnaviv_vram_mapping *mapping,
+ u32 memory_base, dma_addr_t paddr,
+ size_t size);
+void etnaviv_iommu_put_suballoc_va(struct etnaviv_iommu *mmu,
+ struct etnaviv_vram_mapping *mapping);
size_t etnaviv_iommu_dump_size(struct etnaviv_iommu *iommu);
void etnaviv_iommu_dump(struct etnaviv_iommu *iommu, void *buf);
--
2.20.1
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