aboutsummaryrefslogtreecommitdiffstats
path: root/recipes-kernel/most/files/0001-let-HDMs-do-the-coherent-memory-allocation.patch
diff options
context:
space:
mode:
Diffstat (limited to 'recipes-kernel/most/files/0001-let-HDMs-do-the-coherent-memory-allocation.patch')
-rw-r--r--recipes-kernel/most/files/0001-let-HDMs-do-the-coherent-memory-allocation.patch140
1 files changed, 0 insertions, 140 deletions
diff --git a/recipes-kernel/most/files/0001-let-HDMs-do-the-coherent-memory-allocation.patch b/recipes-kernel/most/files/0001-let-HDMs-do-the-coherent-memory-allocation.patch
deleted file mode 100644
index b387faac1..000000000
--- a/recipes-kernel/most/files/0001-let-HDMs-do-the-coherent-memory-allocation.patch
+++ /dev/null
@@ -1,140 +0,0 @@
-From b4fe384dde3e230d8c252525fcd5297015b147d1 Mon Sep 17 00:00:00 2001
-From: Christian Gromm <christian.gromm@microchip.com>
-Date: Wed, 2 Aug 2017 14:51:20 +0200
-Subject: [PATCH 1/5] let HDMs do the coherent memory allocation
-
-On arm64/aarch64 architectures the allocation of coherent memory
-needs a device that has the dma_ops proberly set. That's why the
-core module of the MOST driver is no longer able to allocate this
-kind of memory. This patch moves the allocation process down to
-the HDM layer where the proper devices exist in either the USB
-host controller or the platform device.
-
-Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
-
-
-Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
----
- driver/hdm-dim2/dim2_hdm.c | 12 ++++++++++++
- driver/hdm-usb/hdm_usb.c | 18 ++++++++++++++++++
- driver/include/mostcore.h | 2 ++
- driver/mostcore/core.c | 17 +++++++++++------
- 4 files changed, 43 insertions(+), 6 deletions(-)
-
-diff --git a/hdm-dim2/dim2_hdm.c b/hdm-dim2/dim2_hdm.c
-index 35aee9f..1b164cf 100644
---- a/hdm-dim2/dim2_hdm.c
-+++ b/hdm-dim2/dim2_hdm.c
-@@ -722,6 +722,16 @@ static int poison_channel(struct most_interface *most_iface, int ch_idx)
- return ret;
- }
-
-+static void *dma_alloc(struct mbo *mbo, u32 size)
-+{
-+ return dma_alloc_coherent(NULL, size, &mbo->bus_address, GFP_KERNEL);
-+}
-+
-+static void dma_free(struct mbo *mbo, u32 size)
-+{
-+ dma_free_coherent(NULL, size, mbo->virt_address, mbo->bus_address);
-+}
-+
- /*
- * dim2_probe - dim2 probe handler
- * @pdev: platform device structure
-@@ -820,6 +830,8 @@ static int dim2_probe(struct platform_device *pdev)
- dev->most_iface.channel_vector = dev->capabilities;
- dev->most_iface.configure = configure_channel;
- dev->most_iface.enqueue = enqueue;
-+ dev->most_iface.dma_alloc = dma_alloc;
-+ dev->most_iface.dma_free = dma_free;
- dev->most_iface.poison_channel = poison_channel;
- dev->most_iface.request_netinfo = request_netinfo;
-
-diff --git a/hdm-usb/hdm_usb.c b/hdm-usb/hdm_usb.c
-index 3433646..0b689b5 100644
---- a/hdm-usb/hdm_usb.c
-+++ b/hdm-usb/hdm_usb.c
-@@ -629,6 +629,22 @@ _error:
- return retval;
- }
-
-+static void *hdm_dma_alloc(struct mbo *mbo, u32 size)
-+{
-+ struct most_dev *mdev = to_mdev(mbo->ifp);
-+
-+ return usb_alloc_coherent(mdev->usb_device, size, GFP_KERNEL,
-+ &mbo->bus_address);
-+}
-+
-+static void hdm_dma_free(struct mbo *mbo, u32 size)
-+{
-+ struct most_dev *mdev = to_mdev(mbo->ifp);
-+
-+ usb_free_coherent(mdev->usb_device, size, mbo->virt_address,
-+ mbo->bus_address);
-+}
-+
- /**
- * hdm_configure_channel - receive channel configuration from core
- * @iface: interface
-@@ -1140,6 +1156,8 @@ hdm_probe(struct usb_interface *interface, const struct usb_device_id *id)
- mdev->iface.request_netinfo = hdm_request_netinfo;
- mdev->iface.enqueue = hdm_enqueue;
- mdev->iface.poison_channel = hdm_poison_channel;
-+ mdev->iface.dma_alloc = hdm_dma_alloc;
-+ mdev->iface.dma_free = hdm_dma_free;
- mdev->iface.description = mdev->description;
- mdev->iface.num_channels = num_endpoints;
-
-diff --git a/include/mostcore.h b/include/mostcore.h
-index 5f8339b..deefe25 100644
---- a/include/mostcore.h
-+++ b/include/mostcore.h
-@@ -241,6 +241,8 @@ struct most_interface {
- const char *description;
- int num_channels;
- struct most_channel_capability *channel_vector;
-+ void *(*dma_alloc)(struct mbo *mbo, u32 size);
-+ void (*dma_free)(struct mbo *mbo, u32 size);
- int (*configure)(struct most_interface *iface, int channel_idx,
- struct most_channel_config *channel_config);
- int (*enqueue)(struct most_interface *iface, int channel_idx,
-diff --git a/mostcore/core.c b/mostcore/core.c
-index 4c580d1..931efb9 100644
---- a/mostcore/core.c
-+++ b/mostcore/core.c
-@@ -184,8 +184,10 @@ static void most_free_mbo_coherent(struct mbo *mbo)
- struct most_c_obj *c = mbo->context;
- u16 const coherent_buf_size = c->cfg.buffer_size + c->cfg.extra_len;
-
-- dma_free_coherent(NULL, coherent_buf_size, mbo->virt_address,
-- mbo->bus_address);
-+ if (c->iface->dma_free)
-+ c->iface->dma_free(mbo, coherent_buf_size);
-+ else
-+ kfree(mbo->virt_address);
- kfree(mbo);
- if (atomic_sub_and_test(1, &c->mbo_ref))
- complete(&c->cleanup);
-@@ -1289,10 +1291,13 @@ static int arm_mbo_chain(struct most_c_obj *c, int dir,
- mbo->context = c;
- mbo->ifp = c->iface;
- mbo->hdm_channel_id = c->channel_id;
-- mbo->virt_address = dma_alloc_coherent(NULL,
-- coherent_buf_size,
-- &mbo->bus_address,
-- GFP_KERNEL);
-+ if (c->iface->dma_alloc) {
-+ mbo->virt_address =
-+ c->iface->dma_alloc(mbo, coherent_buf_size);
-+ } else {
-+ mbo->virt_address =
-+ kzalloc(coherent_buf_size, GFP_KERNEL);
-+ }
- if (!mbo->virt_address) {
- pr_info("WARN: No DMA coherent buffer.\n");
- retval = i;
---
-2.7.4
-