Out scatterlist utility routines can be pulled out of i915_gem.h for a
bit more decluttering.
v2: Push I915_GTT_PAGE_SIZE out of i915_scatterlist itself and into the
caller.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Matthew Auld <matthew.auld@xxxxxxxxx>
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 1 +
drivers/gpu/drm/i915/gem/i915_gem_internal.c | 1 +
drivers/gpu/drm/i915/gem/i915_gem_pages.c | 1 +
drivers/gpu/drm/i915/gem/i915_gem_phys.c | 1 +
drivers/gpu/drm/i915/gem/i915_gem_shmem.c | 1 +
drivers/gpu/drm/i915/gem/i915_gem_userptr.c | 1 +
.../drm/i915/gem/selftests/huge_gem_object.c | 2 +
.../drm/i915/gem/selftests/i915_gem_dmabuf.c | 2 +
drivers/gpu/drm/i915/i915_drv.h | 110 ---------------
drivers/gpu/drm/i915/i915_gem.c | 30 +----
drivers/gpu/drm/i915/i915_gem_fence_reg.c | 2 +
drivers/gpu/drm/i915/i915_gem_gtt.c | 3 +-
drivers/gpu/drm/i915/i915_gem_gtt.h | 4 +-
drivers/gpu/drm/i915/i915_gpu_error.c | 1 +
drivers/gpu/drm/i915/i915_scatterlist.c | 39 ++++++
drivers/gpu/drm/i915/i915_scatterlist.h | 127 ++++++++++++++++++
drivers/gpu/drm/i915/selftests/i915_vma.c | 1 +
drivers/gpu/drm/i915/selftests/scatterlist.c | 1 +
19 files changed, 188 insertions(+), 141 deletions(-)
create mode 100644 drivers/gpu/drm/i915/i915_scatterlist.c
create mode 100644 drivers/gpu/drm/i915/i915_scatterlist.h
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index cfefb544b613..8e70d5972195 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -44,6 +44,7 @@ i915-y += i915_drv.o \
i915_irq.o \
i915_params.o \
i915_pci.o \
+ i915_scatterlist.o \
i915_suspend.o \
i915_sysfs.o \
intel_csr.o \
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
index 9b75dd8c267d..4e7efe159531 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
@@ -11,6 +11,7 @@
#include "i915_gem_object.h"
#include "../i915_drv.h"
+#include "../i915_scatterlist.h"
static struct drm_i915_gem_object *dma_buf_to_obj(struct dma_buf *buf)
{
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_internal.c b/drivers/gpu/drm/i915/gem/i915_gem_internal.c
index d40adb3bbe29..d072d0cbce06 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_internal.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_internal.c
@@ -14,6 +14,7 @@
#include "../i915_drv.h"
#include "../i915_gem.h"
+#include "../i915_scatterlist.h"
#include "../i915_utils.h"
#define QUIET (__GFP_NORETRY | __GFP_NOWARN)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pages.c b/drivers/gpu/drm/i915/gem/i915_gem_pages.c
index 452aba0a3359..21635d0ac95e 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_pages.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_pages.c
@@ -7,6 +7,7 @@
#include "i915_gem_object.h"
#include "../i915_drv.h"
+#include "../i915_scatterlist.h"
void __i915_gem_object_set_pages(struct drm_i915_gem_object *obj,
struct sg_table *pages,
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_phys.c b/drivers/gpu/drm/i915/gem/i915_gem_phys.c
index 1bf3e0afcba2..22d185301578 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_phys.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_phys.c
@@ -16,6 +16,7 @@
#include "i915_gem_object.h"
#include "../i915_drv.h"
+#include "../i915_scatterlist.h"
static int i915_gem_object_get_pages_phys(struct drm_i915_gem_object *obj)
{
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c
index 78df86d1db7a..2eee1af88bcb 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c
@@ -10,6 +10,7 @@
#include "i915_gem_object.h"
#include "../i915_drv.h"
+#include "../i915_scatterlist.h"
/*
* Move pages to appropriate lru and release the pagevec, decrementing the
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
index 007a2b8cac8b..0137baa409e1 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
@@ -15,6 +15,7 @@
#include "i915_gem_ioctls.h"
#include "i915_gem_object.h"
+#include "../i915_scatterlist.h"
#include "../i915_trace.h"
#include "../intel_drv.h"
diff --git a/drivers/gpu/drm/i915/gem/selftests/huge_gem_object.c b/drivers/gpu/drm/i915/gem/selftests/huge_gem_object.c
index 824f3761314c..c03781f8b435 100644
--- a/drivers/gpu/drm/i915/gem/selftests/huge_gem_object.c
+++ b/drivers/gpu/drm/i915/gem/selftests/huge_gem_object.c
@@ -4,6 +4,8 @@
* Copyright © 2016 Intel Corporation
*/
+#include "../../i915_scatterlist.h"
+
#include "huge_gem_object.h"
static void huge_free_pages(struct drm_i915_gem_object *obj,
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c
index fc4dd92f4496..da6eb6ecdf68 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c
@@ -9,6 +9,8 @@
#include "../../selftests/mock_gem_device.h"
#include "mock_dmabuf.h"
+#include "../../i915_drv.h"
+
static int igt_dmabuf_export(void *arg)
{
struct drm_i915_private *i915 = arg;
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 65f474a824fb..cec8410ed80b 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2167,111 +2167,6 @@ enum hdmi_force_audio {
GENMASK(INTEL_FRONTBUFFER_BITS_PER_PIPE * ((pipe) + 1) - 1, \
INTEL_FRONTBUFFER_BITS_PER_PIPE * (pipe))
-/*
- * Optimised SGL iterator for GEM objects
- */
-static __always_inline struct sgt_iter {
- struct scatterlist *sgp;
- union {
- unsigned long pfn;
- dma_addr_t dma;
- };
- unsigned int curr;
- unsigned int max;
-} __sgt_iter(struct scatterlist *sgl, bool dma) {
- struct sgt_iter s = { .sgp = sgl };
-
- if (s.sgp) {
- s.max = s.curr = s.sgp->offset;
- s.max += s.sgp->length;
- if (dma)
- s.dma = sg_dma_address(s.sgp);
- else
- s.pfn = page_to_pfn(sg_page(s.sgp));
- }
-
- return s;
-}
-
-static inline struct scatterlist *____sg_next(struct scatterlist *sg)
-{
- ++sg;
- if (unlikely(sg_is_chain(sg)))
- sg = sg_chain_ptr(sg);
- return sg;
-}
-
-/**
- * __sg_next - return the next scatterlist entry in a list
- * @sg: The current sg entry
- *
- * Description:
- * If the entry is the last, return NULL; otherwise, step to the next
- * element in the array (@sg@+1). If that's a chain pointer, follow it;
- * otherwise just return the pointer to the current element.
- **/
-static inline struct scatterlist *__sg_next(struct scatterlist *sg)
-{
- return sg_is_last(sg) ? NULL : ____sg_next(sg);
-}
-
-/**
- * for_each_sgt_dma - iterate over the DMA addresses of the given sg_table
- * @__dmap: DMA address (output)
- * @__iter: 'struct sgt_iter' (iterator state, internal)
- * @__sgt: sg_table to iterate over (input)
- */
-#define for_each_sgt_dma(__dmap, __iter, __sgt) \
- for ((__iter) = __sgt_iter((__sgt)->sgl, true); \
- ((__dmap) = (__iter).dma + (__iter).curr); \
- (((__iter).curr += I915_GTT_PAGE_SIZE) >= (__iter).max) ? \
- (__iter) = __sgt_iter(__sg_next((__iter).sgp), true), 0 : 0)
-
-/**
- * for_each_sgt_page - iterate over the pages of the given sg_table
- * @__pp: page pointer (output)
- * @__iter: 'struct sgt_iter' (iterator state, internal)
- * @__sgt: sg_table to iterate over (input)
- */
-#define for_each_sgt_page(__pp, __iter, __sgt) \
- for ((__iter) = __sgt_iter((__sgt)->sgl, false); \
- ((__pp) = (__iter).pfn == 0 ? NULL : \
- pfn_to_page((__iter).pfn + ((__iter).curr >> PAGE_SHIFT))); \
- (((__iter).curr += PAGE_SIZE) >= (__iter).max) ? \
- (__iter) = __sgt_iter(__sg_next((__iter).sgp), false), 0 : 0)
-
-bool i915_sg_trim(struct sg_table *orig_st);
-
-static inline unsigned int i915_sg_page_sizes(struct scatterlist *sg)
-{
- unsigned int page_sizes;
-
- page_sizes = 0;
- while (sg) {
- GEM_BUG_ON(sg->offset);
- GEM_BUG_ON(!IS_ALIGNED(sg->length, PAGE_SIZE));
- page_sizes |= sg->length;
- sg = __sg_next(sg);
- }
-
- return page_sizes;
-}
-
-static inline unsigned int i915_sg_segment_size(void)
-{
- unsigned int size = swiotlb_max_segment();
-
- if (size == 0)
- return SCATTERLIST_MAX_SEGMENT;
-
- size = rounddown(size, PAGE_SIZE);
- /* swiotlb_max_segment_size can return 1 byte when it means one page. */
- if (size < PAGE_SIZE)
- size = PAGE_SIZE;
-
- return size;
-}
-
#define INTEL_INFO(dev_priv) (&(dev_priv)->__info)
#define RUNTIME_INFO(dev_priv) (&(dev_priv)->__runtime)
#define DRIVER_CAPS(dev_priv) (&(dev_priv)->caps)
@@ -2881,11 +2776,6 @@ int i915_gem_object_unbind(struct drm_i915_gem_object *obj);
void i915_gem_runtime_suspend(struct drm_i915_private *dev_priv);
-static inline int __sg_page_count(const struct scatterlist *sg)
-{
- return sg->length >> PAGE_SHIFT;
-}
-
static inline int __must_check
i915_mutex_lock_interruptible(struct drm_device *dev)
{
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 343a8a837363..7fa1236677b9 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -50,6 +50,7 @@
#include "gt/intel_workarounds.h"
#include "i915_drv.h"
+#include "i915_scatterlist.h"
#include "i915_trace.h"
#include "i915_vgpu.h"
@@ -1061,34 +1062,6 @@ void i915_gem_runtime_suspend(struct drm_i915_private *dev_priv)
}
}
-bool i915_sg_trim(struct sg_table *orig_st)
-{
- struct sg_table new_st;
- struct scatterlist *sg, *new_sg;
- unsigned int i;
-
- if (orig_st->nents == orig_st->orig_nents)
- return false;
-
- if (sg_alloc_table(&new_st, orig_st->nents, GFP_KERNEL | __GFP_NOWARN))
- return false;
-
- new_sg = new_st.sgl;
- for_each_sg(orig_st->sgl, sg, orig_st->nents, i) {
- sg_set_page(new_sg, sg_page(sg), sg->length, 0);
- sg_dma_address(new_sg) = sg_dma_address(sg);
- sg_dma_len(new_sg) = sg_dma_len(sg);
-
- new_sg = sg_next(new_sg);
- }
- GEM_BUG_ON(new_sg); /* Should walk exactly nents and hit the end */
-
- sg_free_table(orig_st);
-
- *orig_st = new_st;
- return true;
-}
-
static unsigned long to_wait_timeout(s64 timeout_ns)
{
if (timeout_ns < 0)
@@ -2342,7 +2315,6 @@ void i915_gem_track_fb(struct drm_i915_gem_object *old,
}
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
-#include "selftests/scatterlist.c"
#include "selftests/mock_gem_device.c"
#include "selftests/i915_gem.c"
#endif
diff --git a/drivers/gpu/drm/i915/i915_gem_fence_reg.c b/drivers/gpu/drm/i915/i915_gem_fence_reg.c
index 3084f52e3372..2e9e32330aaa 100644
--- a/drivers/gpu/drm/i915/i915_gem_fence_reg.c
+++ b/drivers/gpu/drm/i915/i915_gem_fence_reg.c
@@ -22,7 +22,9 @@
*/
#include <drm/i915_drm.h>
+
#include "i915_drv.h"
+#include "i915_scatterlist.h"
/**
* DOC: fence register handling
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 8f5db787b7f2..d3eba67d4bf9 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -36,8 +36,9 @@
#include <drm/i915_drm.h>
#include "i915_drv.h"
-#include "i915_vgpu.h"
+#include "i915_scatterlist.h"
#include "i915_trace.h"
+#include "i915_vgpu.h"
#include "intel_drv.h"
#include "intel_frontbuffer.h"
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index 593079f30fbe..8e661c76d235 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -40,6 +40,7 @@
#include "gt/intel_reset.h"
#include "i915_request.h"
+#include "i915_scatterlist.h"
#include "i915_selftest.h"
#include "i915_timeline.h"
@@ -162,7 +163,8 @@ typedef u64 gen8_ppgtt_pml4e_t;
#define GEN8_PDE_IPS_64K BIT(11)
#define GEN8_PDE_PS_2M BIT(7)
-struct sg_table;
+#define for_each_sgt_dma(__dmap, __iter, __sgt) \
+ __for_each_sgt_dma(__dmap, __iter, __sgt, I915_GTT_PAGE_SIZE)
struct intel_rotation_info {
struct intel_rotation_plane_info {
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index fb424c8d7262..f919cf1a8c41 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -40,6 +40,7 @@
#include "i915_gpu_error.h"
#include "i915_drv.h"
+#include "i915_scatterlist.h"
static inline const struct intel_engine_cs *
engine_lookup(const struct drm_i915_private *i915, unsigned int id)
diff --git a/drivers/gpu/drm/i915/i915_scatterlist.c b/drivers/gpu/drm/i915/i915_scatterlist.c
new file mode 100644
index 000000000000..cc6b3846a8c7
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_scatterlist.c
@@ -0,0 +1,39 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * Copyright © 2016 Intel Corporation
+ */
+
+#include "i915_scatterlist.h"
+
+bool i915_sg_trim(struct sg_table *orig_st)
+{
+ struct sg_table new_st;
+ struct scatterlist *sg, *new_sg;
+ unsigned int i;
+
+ if (orig_st->nents == orig_st->orig_nents)
+ return false;
+
+ if (sg_alloc_table(&new_st, orig_st->nents, GFP_KERNEL | __GFP_NOWARN))
+ return false;
+
+ new_sg = new_st.sgl;
+ for_each_sg(orig_st->sgl, sg, orig_st->nents, i) {
+ sg_set_page(new_sg, sg_page(sg), sg->length, 0);
+ sg_dma_address(new_sg) = sg_dma_address(sg);
+ sg_dma_len(new_sg) = sg_dma_len(sg);
+
+ new_sg = sg_next(new_sg);
+ }
+ GEM_BUG_ON(new_sg); /* Should walk exactly nents and hit the end */
+
+ sg_free_table(orig_st);
+
+ *orig_st = new_st;
+ return true;
+}
+
+#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
+#include "selftests/scatterlist.c"
+#endif
diff --git a/drivers/gpu/drm/i915/i915_scatterlist.h b/drivers/gpu/drm/i915/i915_scatterlist.h
new file mode 100644
index 000000000000..6617963df9ed
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_scatterlist.h
@@ -0,0 +1,127 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * Copyright © 2016 Intel Corporation
+ */
+
+#ifndef I915_SCATTERLIST_H
+#define I915_SCATTERLIST_H
+
+#include <linux/pfn.h>
+#include <linux/scatterlist.h>
+#include <linux/swiotlb.h>
+
+#include "i915_gem.h"
+
+/*
+ * Optimised SGL iterator for GEM objects
+ */
+static __always_inline struct sgt_iter {
+ struct scatterlist *sgp;
+ union {
+ unsigned long pfn;
+ dma_addr_t dma;
+ };
+ unsigned int curr;
+ unsigned int max;
+} __sgt_iter(struct scatterlist *sgl, bool dma) {
+ struct sgt_iter s = { .sgp = sgl };
+
+ if (s.sgp) {
+ s.max = s.curr = s.sgp->offset;
+ s.max += s.sgp->length;
+ if (dma)
+ s.dma = sg_dma_address(s.sgp);
+ else
+ s.pfn = page_to_pfn(sg_page(s.sgp));
+ }
+
+ return s;
+}
+
+static inline int __sg_page_count(const struct scatterlist *sg)
+{
+ return sg->length >> PAGE_SHIFT;
+}
+
+static inline struct scatterlist *____sg_next(struct scatterlist *sg)
+{
+ ++sg;
+ if (unlikely(sg_is_chain(sg)))
+ sg = sg_chain_ptr(sg);
+ return sg;
+}
+
+/**
+ * __sg_next - return the next scatterlist entry in a list
+ * @sg: The current sg entry
+ *
+ * Description:
+ * If the entry is the last, return NULL; otherwise, step to the next
+ * element in the array (@sg@+1). If that's a chain pointer, follow it;
+ * otherwise just return the pointer to the current element.
+ **/
+static inline struct scatterlist *__sg_next(struct scatterlist *sg)
+{
+ return sg_is_last(sg) ? NULL : ____sg_next(sg);
+}
+
+/**
+ * __for_each_sgt_dma - iterate over the DMA addresses of the given sg_table
+ * @__dmap: DMA address (output)
+ * @__iter: 'struct sgt_iter' (iterator state, internal)
+ * @__sgt: sg_table to iterate over (input)
+ * @__step: step size
+ */
+#define __for_each_sgt_dma(__dmap, __iter, __sgt, __step) \
+ for ((__iter) = __sgt_iter((__sgt)->sgl, true); \
+ ((__dmap) = (__iter).dma + (__iter).curr); \
+ (((__iter).curr += (__step)) >= (__iter).max) ? \
+ (__iter) = __sgt_iter(__sg_next((__iter).sgp), true), 0 : 0)
+
+/**
+ * for_each_sgt_page - iterate over the pages of the given sg_table
+ * @__pp: page pointer (output)
+ * @__iter: 'struct sgt_iter' (iterator state, internal)
+ * @__sgt: sg_table to iterate over (input)
+ */
+#define for_each_sgt_page(__pp, __iter, __sgt) \
+ for ((__iter) = __sgt_iter((__sgt)->sgl, false); \
+ ((__pp) = (__iter).pfn == 0 ? NULL : \
+ pfn_to_page((__iter).pfn + ((__iter).curr >> PAGE_SHIFT))); \
+ (((__iter).curr += PAGE_SIZE) >= (__iter).max) ? \
+ (__iter) = __sgt_iter(__sg_next((__iter).sgp), false), 0 : 0)
+
+static inline unsigned int i915_sg_page_sizes(struct scatterlist *sg)
+{
+ unsigned int page_sizes;
+
+ page_sizes = 0;
+ while (sg) {
+ GEM_BUG_ON(sg->offset);
+ GEM_BUG_ON(!IS_ALIGNED(sg->length, PAGE_SIZE));
+ page_sizes |= sg->length;
+ sg = __sg_next(sg);
+ }
+
+ return page_sizes;
+}
+
+static inline unsigned int i915_sg_segment_size(void)
+{
+ unsigned int size = swiotlb_max_segment();
+
+ if (size == 0)
+ return SCATTERLIST_MAX_SEGMENT;
+
+ size = rounddown(size, PAGE_SIZE);
+ /* swiotlb_max_segment_size can return 1 byte when it means one page. */
+ if (size < PAGE_SIZE)
+ size = PAGE_SIZE;
+
+ return size;
+}
+
+bool i915_sg_trim(struct sg_table *orig_st);
+
+#endif
diff --git a/drivers/gpu/drm/i915/selftests/i915_vma.c b/drivers/gpu/drm/i915/selftests/i915_vma.c
index 131d0d9a6cd1..b0a4296a0504 100644
--- a/drivers/gpu/drm/i915/selftests/i915_vma.c
+++ b/drivers/gpu/drm/i915/selftests/i915_vma.c
@@ -30,6 +30,7 @@
#include "mock_gtt.h"
#include "../gem/selftests/mock_context.h"
+#include "../i915_scatterlist.h"
static bool assert_vma(struct i915_vma *vma,
struct drm_i915_gem_object *obj,
diff --git a/drivers/gpu/drm/i915/selftests/scatterlist.c b/drivers/gpu/drm/i915/selftests/scatterlist.c
index cd6d2a16071f..5f0c48a9f051 100644
--- a/drivers/gpu/drm/i915/selftests/scatterlist.c
+++ b/drivers/gpu/drm/i915/selftests/scatterlist.c
@@ -25,6 +25,7 @@
#include <linux/random.h>
#include "../i915_selftest.h"
+#include "../i915_utils.h"
#define PFN_BIAS (1 << 10)
--
2.20.1
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