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From 2b508d92673738d837576301866dc234d8b008c4 Mon Sep 17 00:00:00 2001
Message-Id: <2b508d92673738d837576301866dc234d8b008c4.1668448794.git.stefan@agner.ch>
In-Reply-To: <135d886b4e5077c8fa96a5449a70d81ae9c1c3d0.1668448794.git.stefan@agner.ch>
References: <135d886b4e5077c8fa96a5449a70d81ae9c1c3d0.1668448794.git.stefan@agner.ch>
From: Stefan Agner <stefan@agner.ch>
Date: Thu, 23 Sep 2021 23:58:35 +0200
Subject: [PATCH] nvme: Use pointer for CPU addressed buffers
Pass buffers which use CPU addressing as void pointers. This aligns with
DMA APIs which use void pointers as argument. It will avoid unnecessary
type casts when adding support bus address translations.
Signed-off-by: Stefan Agner <stefan@agner.ch>
---
drivers/nvme/nvme.c | 50 ++++++++++++++++++++--------------------
drivers/nvme/nvme_show.c | 4 ++--
include/nvme.h | 12 +++++-----
3 files changed, 33 insertions(+), 33 deletions(-)
diff --git a/drivers/nvme/nvme.c b/drivers/nvme/nvme.c
index 751abc3cd5..352c94ea91 100644
--- a/drivers/nvme/nvme.c
+++ b/drivers/nvme/nvme.c
@@ -45,11 +45,11 @@ static int nvme_wait_csts(struct nvme_dev *dev, u32 mask, u32 val)
}
static int nvme_setup_prps(struct nvme_dev *dev, u64 *prp2,
- int total_len, u64 dma_addr)
+ int total_len, void *buffer)
{
const u32 page_size = dev->page_size;
const u32 prps_per_page = (page_size >> 3) - 1;
- int offset = dma_addr & (page_size - 1);
+ int offset = (uintptr_t)buffer & (page_size - 1);
u64 *prp_pool;
int length = total_len;
int i, nprps;
@@ -63,10 +63,10 @@ static int nvme_setup_prps(struct nvme_dev *dev, u64 *prp2,
}
if (length)
- dma_addr += (page_size - offset);
+ buffer += (page_size - offset);
if (length <= page_size) {
- *prp2 = dma_addr;
+ *prp2 = (u64)buffer;
return 0;
}
@@ -96,11 +96,11 @@ static int nvme_setup_prps(struct nvme_dev *dev, u64 *prp2,
i = 0;
prp_pool += page_size;
}
- *(prp_pool + i++) = cpu_to_le64(dma_addr);
- dma_addr += page_size;
+ *(prp_pool + i++) = cpu_to_le64((u64)buffer);
+ buffer += page_size;
nprps--;
}
- *prp2 = (ulong)dev->prp_pool;
+ *prp2 = (u64)dev->prp_pool;
flush_dcache_range((ulong)dev->prp_pool, (ulong)dev->prp_pool +
num_pages * page_size);
@@ -447,42 +447,42 @@ static int nvme_alloc_sq(struct nvme_dev *dev, u16 qid,
}
int nvme_identify(struct nvme_dev *dev, unsigned nsid,
- unsigned cns, dma_addr_t dma_addr)
+ unsigned int cns, void *buffer)
{
struct nvme_command c;
u32 page_size = dev->page_size;
- int offset = dma_addr & (page_size - 1);
+ int offset = (uintptr_t)buffer & (page_size - 1);
int length = sizeof(struct nvme_id_ctrl);
int ret;
memset(&c, 0, sizeof(c));
c.identify.opcode = nvme_admin_identify;
c.identify.nsid = cpu_to_le32(nsid);
- c.identify.prp1 = cpu_to_le64(dma_addr);
+ c.identify.prp1 = cpu_to_le64((u64)buffer);
length -= (page_size - offset);
if (length <= 0) {
c.identify.prp2 = 0;
} else {
- dma_addr += (page_size - offset);
- c.identify.prp2 = cpu_to_le64(dma_addr);
+ buffer += (page_size - offset);
+ c.identify.prp2 = cpu_to_le64((u64)buffer);
}
c.identify.cns = cpu_to_le32(cns);
- invalidate_dcache_range(dma_addr,
- dma_addr + sizeof(struct nvme_id_ctrl));
+ invalidate_dcache_range((uintptr_t)buffer,
+ (uintptr_t)buffer + sizeof(struct nvme_id_ctrl));
ret = nvme_submit_admin_cmd(dev, &c, NULL);
if (!ret)
- invalidate_dcache_range(dma_addr,
- dma_addr + sizeof(struct nvme_id_ctrl));
+ invalidate_dcache_range((uintptr_t)buffer,
+ (uintptr_t)buffer + sizeof(struct nvme_id_ctrl));
return ret;
}
int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
- dma_addr_t dma_addr, u32 *result)
+ void *buffer, u32 *result)
{
struct nvme_command c;
int ret;
@@ -490,7 +490,7 @@ int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
memset(&c, 0, sizeof(c));
c.features.opcode = nvme_admin_get_features;
c.features.nsid = cpu_to_le32(nsid);
- c.features.prp1 = cpu_to_le64(dma_addr);
+ c.features.prp1 = cpu_to_le64((u64)buffer);
c.features.fid = cpu_to_le32(fid);
ret = nvme_submit_admin_cmd(dev, &c, result);
@@ -510,13 +510,13 @@ int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
}
int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,
- dma_addr_t dma_addr, u32 *result)
+ void *buffer, u32 *result)
{
struct nvme_command c;
memset(&c, 0, sizeof(c));
c.features.opcode = nvme_admin_set_features;
- c.features.prp1 = cpu_to_le64(dma_addr);
+ c.features.prp1 = cpu_to_le64((u64)buffer);
c.features.fid = cpu_to_le32(fid);
c.features.dword11 = cpu_to_le32(dword11);
@@ -567,7 +567,7 @@ static int nvme_set_queue_count(struct nvme_dev *dev, int count)
u32 q_count = (count - 1) | ((count - 1) << 16);
status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES,
- q_count, 0, &result);
+ q_count, NULL, &result);
if (status < 0)
return status;
@@ -619,7 +619,7 @@ static int nvme_get_info_from_identify(struct nvme_dev *dev)
if (!ctrl)
return -ENOMEM;
- ret = nvme_identify(dev, 0, 1, (dma_addr_t)(long)ctrl);
+ ret = nvme_identify(dev, 0, 1, ctrl);
if (ret) {
free(ctrl);
return -EIO;
@@ -704,7 +704,7 @@ static int nvme_blk_probe(struct udevice *udev)
ns->dev = ndev;
/* extract the namespace id from the block device name */
ns->ns_id = trailing_strtol(udev->name);
- if (nvme_identify(ndev, ns->ns_id, 0, (dma_addr_t)(long)id)) {
+ if (nvme_identify(ndev, ns->ns_id, 0, id)) {
free(id);
return -EIO;
}
@@ -738,7 +738,7 @@ static ulong nvme_blk_rw(struct udevice *udev, lbaint_t blknr,
u64 prp2;
u64 total_len = blkcnt << desc->log2blksz;
u64 temp_len = total_len;
- uintptr_t temp_buffer = (uintptr_t)buffer;
+ void *temp_buffer = buffer;
u64 slba = blknr;
u16 lbas = 1 << (dev->max_transfer_shift - ns->lba_shift);
@@ -872,7 +872,7 @@ int nvme_init(struct udevice *udev)
char name[20];
memset(id, 0, sizeof(*id));
- if (nvme_identify(ndev, i, 0, (dma_addr_t)(long)id)) {
+ if (nvme_identify(ndev, i, 0, id)) {
ret = -EIO;
goto free_id;
}
diff --git a/drivers/nvme/nvme_show.c b/drivers/nvme/nvme_show.c
index 72cbac82bc..ac9b5cc9bd 100644
--- a/drivers/nvme/nvme_show.c
+++ b/drivers/nvme/nvme_show.c
@@ -114,7 +114,7 @@ int nvme_print_info(struct udevice *udev)
if (!ctrl)
return -ENOMEM;
- if (nvme_identify(dev, 0, 1, (dma_addr_t)(long)ctrl)) {
+ if (nvme_identify(dev, 0, 1, ctrl)) {
ret = -EIO;
goto free_ctrl;
}
@@ -129,7 +129,7 @@ int nvme_print_info(struct udevice *udev)
goto free_ctrl;
}
- if (nvme_identify(dev, ns->ns_id, 0, (dma_addr_t)(long)id)) {
+ if (nvme_identify(dev, ns->ns_id, 0, id)) {
ret = -EIO;
goto free_id;
}
diff --git a/include/nvme.h b/include/nvme.h
index 2cdf8ce320..8ff823cd81 100644
--- a/include/nvme.h
+++ b/include/nvme.h
@@ -18,12 +18,12 @@ struct nvme_dev;
* @dev: NVMe controller device
* @nsid: 0 for controller, namespace id for namespace to identify
* @cns: 1 for controller, 0 for namespace
- * @dma_addr: dma buffer address to store the identify result
+ * @buffer: dma buffer address to store the identify result
* @return: 0 on success, -ETIMEDOUT on command execution timeout,
* -EIO on command execution fails
*/
int nvme_identify(struct nvme_dev *dev, unsigned nsid,
- unsigned cns, dma_addr_t dma_addr);
+ unsigned int cns, void *buffer);
/**
* nvme_get_features - retrieve the attributes of the feature specified
@@ -33,13 +33,13 @@ int nvme_identify(struct nvme_dev *dev, unsigned nsid,
* @dev: NVMe controller device
* @fid: feature id to provide data
* @nsid: namespace id the command applies to
- * @dma_addr: data structure used as part of the specified feature
+ * @buffer: data structure used as part of the specified feature
* @result: command-specific result in the completion queue entry
* @return: 0 on success, -ETIMEDOUT on command execution timeout,
* -EIO on command execution fails
*/
int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
- dma_addr_t dma_addr, u32 *result);
+ void *buffer, u32 *result);
/**
* nvme_set_features - specify the attributes of the feature indicated
@@ -49,13 +49,13 @@ int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
* @dev: NVMe controller device
* @fid: feature id to provide data
* @dword11: command-specific input parameter
- * @dma_addr: data structure used as part of the specified feature
+ * @buffer: data structure used as part of the specified feature
* @result: command-specific result in the completion queue entry
* @return: 0 on success, -ETIMEDOUT on command execution timeout,
* -EIO on command execution fails
*/
int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,
- dma_addr_t dma_addr, u32 *result);
+ void *buffer, u32 *result);
/**
* nvme_scan_namespace - scan all namespaces attached to NVMe controllers
--
2.38.1
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