This is a note to let you know that I've just added the patch titled
net: mana: Add support for page sizes other than 4KB on ARM64
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-mana-add-support-for-page-sizes-other-than-4kb-o.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 2464c87876ed0c7a9978ae776305f00dc823f868
Author: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
Date: Mon Jun 17 13:17:26 2024 -0700
net: mana: Add support for page sizes other than 4KB on ARM64
[ Upstream commit 382d1741b5b2feffef7942dd074206372afe1a96 ]
As defined by the MANA Hardware spec, the queue size for DMA is 4KB
minimal, and power of 2. And, the HWC queue size has to be exactly
4KB.
To support page sizes other than 4KB on ARM64, define the minimal
queue size as a macro separately from the PAGE_SIZE, which we always
assumed it to be 4KB before supporting ARM64.
Also, add MANA specific macros and update code related to size
alignment, DMA region calculations, etc.
Signed-off-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
Reviewed-by: Michael Kelley <mhklinux@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/1718655446-6576-1-git-send-email-haiyangz@xxxxxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Stable-dep-of: 9e517a8e9d9a ("RDMA/mana_ib: use the correct page table index based on hardware page size")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/microsoft/Kconfig b/drivers/net/ethernet/microsoft/Kconfig
index 286f0d5697a16..901fbffbf718e 100644
--- a/drivers/net/ethernet/microsoft/Kconfig
+++ b/drivers/net/ethernet/microsoft/Kconfig
@@ -18,7 +18,7 @@ if NET_VENDOR_MICROSOFT
config MICROSOFT_MANA
tristate "Microsoft Azure Network Adapter (MANA) support"
depends on PCI_MSI
- depends on X86_64 || (ARM64 && !CPU_BIG_ENDIAN && ARM64_4K_PAGES)
+ depends on X86_64 || (ARM64 && !CPU_BIG_ENDIAN)
depends on PCI_HYPERV
select AUXILIARY_BUS
select PAGE_POOL
diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c
index 6367de0c2c2e8..ae014e21eb605 100644
--- a/drivers/net/ethernet/microsoft/mana/gdma_main.c
+++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c
@@ -179,7 +179,7 @@ int mana_gd_alloc_memory(struct gdma_context *gc, unsigned int length,
dma_addr_t dma_handle;
void *buf;
- if (length < PAGE_SIZE || !is_power_of_2(length))
+ if (length < MANA_PAGE_SIZE || !is_power_of_2(length))
return -EINVAL;
gmi->dev = gc->dev;
@@ -720,7 +720,7 @@ EXPORT_SYMBOL_NS(mana_gd_destroy_dma_region, NET_MANA);
static int mana_gd_create_dma_region(struct gdma_dev *gd,
struct gdma_mem_info *gmi)
{
- unsigned int num_page = gmi->length / PAGE_SIZE;
+ unsigned int num_page = gmi->length / MANA_PAGE_SIZE;
struct gdma_create_dma_region_req *req = NULL;
struct gdma_create_dma_region_resp resp = {};
struct gdma_context *gc = gd->gdma_context;
@@ -730,10 +730,10 @@ static int mana_gd_create_dma_region(struct gdma_dev *gd,
int err;
int i;
- if (length < PAGE_SIZE || !is_power_of_2(length))
+ if (length < MANA_PAGE_SIZE || !is_power_of_2(length))
return -EINVAL;
- if (offset_in_page(gmi->virt_addr) != 0)
+ if (!MANA_PAGE_ALIGNED(gmi->virt_addr))
return -EINVAL;
hwc = gc->hwc.driver_data;
@@ -754,7 +754,7 @@ static int mana_gd_create_dma_region(struct gdma_dev *gd,
req->page_addr_list_len = num_page;
for (i = 0; i < num_page; i++)
- req->page_addr_list[i] = gmi->dma_handle + i * PAGE_SIZE;
+ req->page_addr_list[i] = gmi->dma_handle + i * MANA_PAGE_SIZE;
err = mana_gd_send_request(gc, req_msg_size, req, sizeof(resp), &resp);
if (err)
diff --git a/drivers/net/ethernet/microsoft/mana/hw_channel.c b/drivers/net/ethernet/microsoft/mana/hw_channel.c
index 236daa0535ba0..9d6426d4158e3 100644
--- a/drivers/net/ethernet/microsoft/mana/hw_channel.c
+++ b/drivers/net/ethernet/microsoft/mana/hw_channel.c
@@ -366,12 +366,12 @@ static int mana_hwc_create_cq(struct hw_channel_context *hwc, u16 q_depth,
int err;
eq_size = roundup_pow_of_two(GDMA_EQE_SIZE * q_depth);
- if (eq_size < MINIMUM_SUPPORTED_PAGE_SIZE)
- eq_size = MINIMUM_SUPPORTED_PAGE_SIZE;
+ if (eq_size < MANA_MIN_QSIZE)
+ eq_size = MANA_MIN_QSIZE;
cq_size = roundup_pow_of_two(GDMA_CQE_SIZE * q_depth);
- if (cq_size < MINIMUM_SUPPORTED_PAGE_SIZE)
- cq_size = MINIMUM_SUPPORTED_PAGE_SIZE;
+ if (cq_size < MANA_MIN_QSIZE)
+ cq_size = MANA_MIN_QSIZE;
hwc_cq = kzalloc(sizeof(*hwc_cq), GFP_KERNEL);
if (!hwc_cq)
@@ -433,7 +433,7 @@ static int mana_hwc_alloc_dma_buf(struct hw_channel_context *hwc, u16 q_depth,
dma_buf->num_reqs = q_depth;
- buf_size = PAGE_ALIGN(q_depth * max_msg_size);
+ buf_size = MANA_PAGE_ALIGN(q_depth * max_msg_size);
gmi = &dma_buf->mem_info;
err = mana_gd_alloc_memory(gc, buf_size, gmi);
@@ -501,8 +501,8 @@ static int mana_hwc_create_wq(struct hw_channel_context *hwc,
else
queue_size = roundup_pow_of_two(GDMA_MAX_SQE_SIZE * q_depth);
- if (queue_size < MINIMUM_SUPPORTED_PAGE_SIZE)
- queue_size = MINIMUM_SUPPORTED_PAGE_SIZE;
+ if (queue_size < MANA_MIN_QSIZE)
+ queue_size = MANA_MIN_QSIZE;
hwc_wq = kzalloc(sizeof(*hwc_wq), GFP_KERNEL);
if (!hwc_wq)
diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c
index d8cce3771af21..89852bbc877c1 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_en.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_en.c
@@ -1902,10 +1902,10 @@ static int mana_create_txq(struct mana_port_context *apc,
* to prevent overflow.
*/
txq_size = MAX_SEND_BUFFERS_PER_QUEUE * 32;
- BUILD_BUG_ON(!PAGE_ALIGNED(txq_size));
+ BUILD_BUG_ON(!MANA_PAGE_ALIGNED(txq_size));
cq_size = MAX_SEND_BUFFERS_PER_QUEUE * COMP_ENTRY_SIZE;
- cq_size = PAGE_ALIGN(cq_size);
+ cq_size = MANA_PAGE_ALIGN(cq_size);
gc = gd->gdma_context;
@@ -2203,8 +2203,8 @@ static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc,
if (err)
goto out;
- rq_size = PAGE_ALIGN(rq_size);
- cq_size = PAGE_ALIGN(cq_size);
+ rq_size = MANA_PAGE_ALIGN(rq_size);
+ cq_size = MANA_PAGE_ALIGN(cq_size);
/* Create RQ */
memset(&spec, 0, sizeof(spec));
diff --git a/drivers/net/ethernet/microsoft/mana/shm_channel.c b/drivers/net/ethernet/microsoft/mana/shm_channel.c
index 5553af9c8085a..0f1679ebad96b 100644
--- a/drivers/net/ethernet/microsoft/mana/shm_channel.c
+++ b/drivers/net/ethernet/microsoft/mana/shm_channel.c
@@ -6,6 +6,7 @@
#include <linux/io.h>
#include <linux/mm.h>
+#include <net/mana/gdma.h>
#include <net/mana/shm_channel.h>
#define PAGE_FRAME_L48_WIDTH_BYTES 6
@@ -155,8 +156,8 @@ int mana_smc_setup_hwc(struct shm_channel *sc, bool reset_vf, u64 eq_addr,
return err;
}
- if (!PAGE_ALIGNED(eq_addr) || !PAGE_ALIGNED(cq_addr) ||
- !PAGE_ALIGNED(rq_addr) || !PAGE_ALIGNED(sq_addr))
+ if (!MANA_PAGE_ALIGNED(eq_addr) || !MANA_PAGE_ALIGNED(cq_addr) ||
+ !MANA_PAGE_ALIGNED(rq_addr) || !MANA_PAGE_ALIGNED(sq_addr))
return -EINVAL;
if ((eq_msix_index & VECTOR_MASK) != eq_msix_index)
@@ -183,7 +184,7 @@ int mana_smc_setup_hwc(struct shm_channel *sc, bool reset_vf, u64 eq_addr,
/* EQ addr: low 48 bits of frame address */
shmem = (u64 *)ptr;
- frame_addr = PHYS_PFN(eq_addr);
+ frame_addr = MANA_PFN(eq_addr);
*shmem = frame_addr & PAGE_FRAME_L48_MASK;
all_addr_h4bits |= (frame_addr >> PAGE_FRAME_L48_WIDTH_BITS) <<
(frame_addr_seq++ * PAGE_FRAME_H4_WIDTH_BITS);
@@ -191,7 +192,7 @@ int mana_smc_setup_hwc(struct shm_channel *sc, bool reset_vf, u64 eq_addr,
/* CQ addr: low 48 bits of frame address */
shmem = (u64 *)ptr;
- frame_addr = PHYS_PFN(cq_addr);
+ frame_addr = MANA_PFN(cq_addr);
*shmem = frame_addr & PAGE_FRAME_L48_MASK;
all_addr_h4bits |= (frame_addr >> PAGE_FRAME_L48_WIDTH_BITS) <<
(frame_addr_seq++ * PAGE_FRAME_H4_WIDTH_BITS);
@@ -199,7 +200,7 @@ int mana_smc_setup_hwc(struct shm_channel *sc, bool reset_vf, u64 eq_addr,
/* RQ addr: low 48 bits of frame address */
shmem = (u64 *)ptr;
- frame_addr = PHYS_PFN(rq_addr);
+ frame_addr = MANA_PFN(rq_addr);
*shmem = frame_addr & PAGE_FRAME_L48_MASK;
all_addr_h4bits |= (frame_addr >> PAGE_FRAME_L48_WIDTH_BITS) <<
(frame_addr_seq++ * PAGE_FRAME_H4_WIDTH_BITS);
@@ -207,7 +208,7 @@ int mana_smc_setup_hwc(struct shm_channel *sc, bool reset_vf, u64 eq_addr,
/* SQ addr: low 48 bits of frame address */
shmem = (u64 *)ptr;
- frame_addr = PHYS_PFN(sq_addr);
+ frame_addr = MANA_PFN(sq_addr);
*shmem = frame_addr & PAGE_FRAME_L48_MASK;
all_addr_h4bits |= (frame_addr >> PAGE_FRAME_L48_WIDTH_BITS) <<
(frame_addr_seq++ * PAGE_FRAME_H4_WIDTH_BITS);
diff --git a/include/net/mana/gdma.h b/include/net/mana/gdma.h
index 88b6ef7ce1a6e..3965343fdee0c 100644
--- a/include/net/mana/gdma.h
+++ b/include/net/mana/gdma.h
@@ -222,7 +222,15 @@ struct gdma_dev {
struct auxiliary_device *adev;
};
-#define MINIMUM_SUPPORTED_PAGE_SIZE PAGE_SIZE
+/* MANA_PAGE_SIZE is the DMA unit */
+#define MANA_PAGE_SHIFT 12
+#define MANA_PAGE_SIZE BIT(MANA_PAGE_SHIFT)
+#define MANA_PAGE_ALIGN(x) ALIGN((x), MANA_PAGE_SIZE)
+#define MANA_PAGE_ALIGNED(addr) IS_ALIGNED((unsigned long)(addr), MANA_PAGE_SIZE)
+#define MANA_PFN(a) ((a) >> MANA_PAGE_SHIFT)
+
+/* Required by HW */
+#define MANA_MIN_QSIZE MANA_PAGE_SIZE
#define GDMA_CQE_SIZE 64
#define GDMA_EQE_SIZE 16
diff --git a/include/net/mana/mana.h b/include/net/mana/mana.h
index 28e110f733ffd..7892b79854f62 100644
--- a/include/net/mana/mana.h
+++ b/include/net/mana/mana.h
@@ -42,7 +42,8 @@ enum TRI_STATE {
#define MAX_SEND_BUFFERS_PER_QUEUE 256
-#define EQ_SIZE (8 * PAGE_SIZE)
+#define EQ_SIZE (8 * MANA_PAGE_SIZE)
+
#define LOG2_EQ_THROTTLE 3
#define MAX_PORTS_IN_MANA_DEV 256
