This is a note to let you know that I've just added the patch titled
cxl/pci: Make 'struct cxl_mem' device type generic
to the 5.15-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:
cxl-pci-make-struct-cxl_mem-device-type-generic.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit fec63be32a3f61c396c2ba2b911db98b92a54107
Author: Dan Williams <dan.j.williams@xxxxxxxxx>
Date: Wed Sep 8 22:12:09 2021 -0700
cxl/pci: Make 'struct cxl_mem' device type generic
[ Upstream commit 99e222a5f1b67dd17c2c780f4eb9a694707d3bf7 ]
In preparation for adding a unit test provider of a cxl_memdev, convert
the 'struct cxl_mem' driver context to carry a generic device rather
than a pci device.
Note, some dev_dbg() lines needed extra reformatting per clang-format.
This conversion also allows the cxl_mem_create() and
devm_cxl_add_memdev() calling conventions to be simplified. The "host"
for a cxl_memdev, must be the same device for the driver that allocated
@cxlm.
Acked-by: Ben Widawsky <ben.widawsky@xxxxxxxxx>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Reviewed-by: Ben Widawsky <ben.widawsky@xxxxxxxxx>
Link: https://lore.kernel.org/r/163116432973.2460985.7553504957932024222.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Stable-dep-of: 88d3917f82ed ("cxl/mem: Fix shutdown order")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/cxl/core/memdev.c b/drivers/cxl/core/memdev.c
index a9c317e320107..331ef7d6c5984 100644
--- a/drivers/cxl/core/memdev.c
+++ b/drivers/cxl/core/memdev.c
@@ -149,7 +149,6 @@ static void cxl_memdev_unregister(void *_cxlmd)
static struct cxl_memdev *cxl_memdev_alloc(struct cxl_mem *cxlm,
const struct file_operations *fops)
{
- struct pci_dev *pdev = cxlm->pdev;
struct cxl_memdev *cxlmd;
struct device *dev;
struct cdev *cdev;
@@ -166,7 +165,7 @@ static struct cxl_memdev *cxl_memdev_alloc(struct cxl_mem *cxlm,
dev = &cxlmd->dev;
device_initialize(dev);
- dev->parent = &pdev->dev;
+ dev->parent = cxlm->dev;
dev->bus = &cxl_bus_type;
dev->devt = MKDEV(cxl_mem_major, cxlmd->id);
dev->type = &cxl_memdev_type;
@@ -182,7 +181,7 @@ static struct cxl_memdev *cxl_memdev_alloc(struct cxl_mem *cxlm,
}
struct cxl_memdev *
-devm_cxl_add_memdev(struct device *host, struct cxl_mem *cxlm,
+devm_cxl_add_memdev(struct cxl_mem *cxlm,
const struct cdevm_file_operations *cdevm_fops)
{
struct cxl_memdev *cxlmd;
@@ -210,7 +209,7 @@ devm_cxl_add_memdev(struct device *host, struct cxl_mem *cxlm,
if (rc)
goto err;
- rc = devm_add_action_or_reset(host, cxl_memdev_unregister, cxlmd);
+ rc = devm_add_action_or_reset(cxlm->dev, cxl_memdev_unregister, cxlmd);
if (rc)
return ERR_PTR(rc);
return cxlmd;
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
index 6c0b1e2ea97c7..d5334df83fb25 100644
--- a/drivers/cxl/cxlmem.h
+++ b/drivers/cxl/cxlmem.h
@@ -63,12 +63,12 @@ static inline struct cxl_memdev *to_cxl_memdev(struct device *dev)
}
struct cxl_memdev *
-devm_cxl_add_memdev(struct device *host, struct cxl_mem *cxlm,
+devm_cxl_add_memdev(struct cxl_mem *cxlm,
const struct cdevm_file_operations *cdevm_fops);
/**
* struct cxl_mem - A CXL memory device
- * @pdev: The PCI device associated with this CXL device.
+ * @dev: The device associated with this CXL device.
* @cxlmd: Logical memory device chardev / interface
* @regs: Parsed register blocks
* @payload_size: Size of space for payload
@@ -82,7 +82,7 @@ devm_cxl_add_memdev(struct device *host, struct cxl_mem *cxlm,
* @ram_range: Volatile memory capacity information.
*/
struct cxl_mem {
- struct pci_dev *pdev;
+ struct device *dev;
struct cxl_memdev *cxlmd;
struct cxl_regs regs;
diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
index 5444b5a7fd3c4..7b8ff6e592c46 100644
--- a/drivers/cxl/pci.c
+++ b/drivers/cxl/pci.c
@@ -250,7 +250,7 @@ static int cxl_mem_wait_for_doorbell(struct cxl_mem *cxlm)
cpu_relax();
}
- dev_dbg(&cxlm->pdev->dev, "Doorbell wait took %dms",
+ dev_dbg(cxlm->dev, "Doorbell wait took %dms",
jiffies_to_msecs(end) - jiffies_to_msecs(start));
return 0;
}
@@ -268,7 +268,7 @@ static bool cxl_is_security_command(u16 opcode)
static void cxl_mem_mbox_timeout(struct cxl_mem *cxlm,
struct mbox_cmd *mbox_cmd)
{
- struct device *dev = &cxlm->pdev->dev;
+ struct device *dev = cxlm->dev;
dev_dbg(dev, "Mailbox command (opcode: %#x size: %zub) timed out\n",
mbox_cmd->opcode, mbox_cmd->size_in);
@@ -300,6 +300,7 @@ static int __cxl_mem_mbox_send_cmd(struct cxl_mem *cxlm,
struct mbox_cmd *mbox_cmd)
{
void __iomem *payload = cxlm->regs.mbox + CXLDEV_MBOX_PAYLOAD_OFFSET;
+ struct device *dev = cxlm->dev;
u64 cmd_reg, status_reg;
size_t out_len;
int rc;
@@ -325,8 +326,7 @@ static int __cxl_mem_mbox_send_cmd(struct cxl_mem *cxlm,
/* #1 */
if (cxl_doorbell_busy(cxlm)) {
- dev_err_ratelimited(&cxlm->pdev->dev,
- "Mailbox re-busy after acquiring\n");
+ dev_err_ratelimited(dev, "Mailbox re-busy after acquiring\n");
return -EBUSY;
}
@@ -345,7 +345,7 @@ static int __cxl_mem_mbox_send_cmd(struct cxl_mem *cxlm,
writeq(cmd_reg, cxlm->regs.mbox + CXLDEV_MBOX_CMD_OFFSET);
/* #4 */
- dev_dbg(&cxlm->pdev->dev, "Sending command\n");
+ dev_dbg(dev, "Sending command\n");
writel(CXLDEV_MBOX_CTRL_DOORBELL,
cxlm->regs.mbox + CXLDEV_MBOX_CTRL_OFFSET);
@@ -362,7 +362,7 @@ static int __cxl_mem_mbox_send_cmd(struct cxl_mem *cxlm,
FIELD_GET(CXLDEV_MBOX_STATUS_RET_CODE_MASK, status_reg);
if (mbox_cmd->return_code != 0) {
- dev_dbg(&cxlm->pdev->dev, "Mailbox operation had an error\n");
+ dev_dbg(dev, "Mailbox operation had an error\n");
return 0;
}
@@ -399,7 +399,7 @@ static int __cxl_mem_mbox_send_cmd(struct cxl_mem *cxlm,
*/
static int cxl_mem_mbox_get(struct cxl_mem *cxlm)
{
- struct device *dev = &cxlm->pdev->dev;
+ struct device *dev = cxlm->dev;
u64 md_status;
int rc;
@@ -502,7 +502,7 @@ static int handle_mailbox_cmd_from_user(struct cxl_mem *cxlm,
u64 in_payload, u64 out_payload,
s32 *size_out, u32 *retval)
{
- struct device *dev = &cxlm->pdev->dev;
+ struct device *dev = cxlm->dev;
struct mbox_cmd mbox_cmd = {
.opcode = cmd->opcode,
.size_in = cmd->info.size_in,
@@ -925,20 +925,19 @@ static int cxl_mem_setup_mailbox(struct cxl_mem *cxlm)
*/
cxlm->payload_size = min_t(size_t, cxlm->payload_size, SZ_1M);
if (cxlm->payload_size < 256) {
- dev_err(&cxlm->pdev->dev, "Mailbox is too small (%zub)",
+ dev_err(cxlm->dev, "Mailbox is too small (%zub)",
cxlm->payload_size);
return -ENXIO;
}
- dev_dbg(&cxlm->pdev->dev, "Mailbox payload sized %zu",
+ dev_dbg(cxlm->dev, "Mailbox payload sized %zu",
cxlm->payload_size);
return 0;
}
-static struct cxl_mem *cxl_mem_create(struct pci_dev *pdev)
+static struct cxl_mem *cxl_mem_create(struct device *dev)
{
- struct device *dev = &pdev->dev;
struct cxl_mem *cxlm;
cxlm = devm_kzalloc(dev, sizeof(*cxlm), GFP_KERNEL);
@@ -948,7 +947,7 @@ static struct cxl_mem *cxl_mem_create(struct pci_dev *pdev)
}
mutex_init(&cxlm->mbox_mutex);
- cxlm->pdev = pdev;
+ cxlm->dev = dev;
cxlm->enabled_cmds =
devm_kmalloc_array(dev, BITS_TO_LONGS(cxl_cmd_count),
sizeof(unsigned long),
@@ -964,9 +963,9 @@ static struct cxl_mem *cxl_mem_create(struct pci_dev *pdev)
static void __iomem *cxl_mem_map_regblock(struct cxl_mem *cxlm,
u8 bar, u64 offset)
{
- struct pci_dev *pdev = cxlm->pdev;
- struct device *dev = &pdev->dev;
void __iomem *addr;
+ struct device *dev = cxlm->dev;
+ struct pci_dev *pdev = to_pci_dev(dev);
/* Basic sanity check that BAR is big enough */
if (pci_resource_len(pdev, bar) < offset) {
@@ -989,7 +988,7 @@ static void __iomem *cxl_mem_map_regblock(struct cxl_mem *cxlm,
static void cxl_mem_unmap_regblock(struct cxl_mem *cxlm, void __iomem *base)
{
- pci_iounmap(cxlm->pdev, base);
+ pci_iounmap(to_pci_dev(cxlm->dev), base);
}
static int cxl_mem_dvsec(struct pci_dev *pdev, int dvsec)
@@ -1018,10 +1017,9 @@ static int cxl_mem_dvsec(struct pci_dev *pdev, int dvsec)
static int cxl_probe_regs(struct cxl_mem *cxlm, void __iomem *base,
struct cxl_register_map *map)
{
- struct pci_dev *pdev = cxlm->pdev;
- struct device *dev = &pdev->dev;
struct cxl_component_reg_map *comp_map;
struct cxl_device_reg_map *dev_map;
+ struct device *dev = cxlm->dev;
switch (map->reg_type) {
case CXL_REGLOC_RBI_COMPONENT:
@@ -1057,8 +1055,8 @@ static int cxl_probe_regs(struct cxl_mem *cxlm, void __iomem *base,
static int cxl_map_regs(struct cxl_mem *cxlm, struct cxl_register_map *map)
{
- struct pci_dev *pdev = cxlm->pdev;
- struct device *dev = &pdev->dev;
+ struct device *dev = cxlm->dev;
+ struct pci_dev *pdev = to_pci_dev(dev);
switch (map->reg_type) {
case CXL_REGLOC_RBI_COMPONENT:
@@ -1096,13 +1094,12 @@ static void cxl_decode_register_block(u32 reg_lo, u32 reg_hi,
*/
static int cxl_mem_setup_regs(struct cxl_mem *cxlm)
{
- struct pci_dev *pdev = cxlm->pdev;
- struct device *dev = &pdev->dev;
- u32 regloc_size, regblocks;
void __iomem *base;
- int regloc, i, n_maps;
+ u32 regloc_size, regblocks;
+ int regloc, i, n_maps, ret = 0;
+ struct device *dev = cxlm->dev;
+ struct pci_dev *pdev = to_pci_dev(dev);
struct cxl_register_map *map, maps[CXL_REGLOC_RBI_TYPES];
- int ret = 0;
regloc = cxl_mem_dvsec(pdev, PCI_DVSEC_ID_CXL_REGLOC_DVSEC_ID);
if (!regloc) {
@@ -1226,7 +1223,7 @@ static void cxl_walk_cel(struct cxl_mem *cxlm, size_t size, u8 *cel)
struct cxl_mem_command *cmd = cxl_mem_find_command(opcode);
if (!cmd) {
- dev_dbg(&cxlm->pdev->dev,
+ dev_dbg(cxlm->dev,
"Opcode 0x%04x unsupported by driver", opcode);
continue;
}
@@ -1323,7 +1320,7 @@ static int cxl_mem_get_partition_info(struct cxl_mem *cxlm,
static int cxl_mem_enumerate_cmds(struct cxl_mem *cxlm)
{
struct cxl_mbox_get_supported_logs *gsl;
- struct device *dev = &cxlm->pdev->dev;
+ struct device *dev = cxlm->dev;
struct cxl_mem_command *cmd;
int i, rc;
@@ -1418,15 +1415,14 @@ static int cxl_mem_identify(struct cxl_mem *cxlm)
cxlm->partition_align_bytes = le64_to_cpu(id.partition_align);
cxlm->partition_align_bytes *= CXL_CAPACITY_MULTIPLIER;
- dev_dbg(&cxlm->pdev->dev, "Identify Memory Device\n"
+ dev_dbg(cxlm->dev,
+ "Identify Memory Device\n"
" total_bytes = %#llx\n"
" volatile_only_bytes = %#llx\n"
" persistent_only_bytes = %#llx\n"
" partition_align_bytes = %#llx\n",
- cxlm->total_bytes,
- cxlm->volatile_only_bytes,
- cxlm->persistent_only_bytes,
- cxlm->partition_align_bytes);
+ cxlm->total_bytes, cxlm->volatile_only_bytes,
+ cxlm->persistent_only_bytes, cxlm->partition_align_bytes);
cxlm->lsa_size = le32_to_cpu(id.lsa_size);
memcpy(cxlm->firmware_version, id.fw_revision, sizeof(id.fw_revision));
@@ -1453,19 +1449,18 @@ static int cxl_mem_create_range_info(struct cxl_mem *cxlm)
&cxlm->next_volatile_bytes,
&cxlm->next_persistent_bytes);
if (rc < 0) {
- dev_err(&cxlm->pdev->dev, "Failed to query partition information\n");
+ dev_err(cxlm->dev, "Failed to query partition information\n");
return rc;
}
- dev_dbg(&cxlm->pdev->dev, "Get Partition Info\n"
+ dev_dbg(cxlm->dev,
+ "Get Partition Info\n"
" active_volatile_bytes = %#llx\n"
" active_persistent_bytes = %#llx\n"
" next_volatile_bytes = %#llx\n"
" next_persistent_bytes = %#llx\n",
- cxlm->active_volatile_bytes,
- cxlm->active_persistent_bytes,
- cxlm->next_volatile_bytes,
- cxlm->next_persistent_bytes);
+ cxlm->active_volatile_bytes, cxlm->active_persistent_bytes,
+ cxlm->next_volatile_bytes, cxlm->next_persistent_bytes);
cxlm->ram_range.start = 0;
cxlm->ram_range.end = cxlm->active_volatile_bytes - 1;
@@ -1487,7 +1482,7 @@ static int cxl_mem_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (rc)
return rc;
- cxlm = cxl_mem_create(pdev);
+ cxlm = cxl_mem_create(&pdev->dev);
if (IS_ERR(cxlm))
return PTR_ERR(cxlm);
@@ -1511,7 +1506,7 @@ static int cxl_mem_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (rc)
return rc;
- cxlmd = devm_cxl_add_memdev(&pdev->dev, cxlm, &cxl_memdev_fops);
+ cxlmd = devm_cxl_add_memdev(cxlm, &cxl_memdev_fops);
if (IS_ERR(cxlmd))
return PTR_ERR(cxlmd);
