This series add basic support for FF-A v1.2. It mainly includes support for newly added: 1. FFA_MSG_SEND_DIRECT_{REQ,RESP}2 2. FFA_PARTITION_INFO_GET_REGS 3. FFA_YIELD support in direct messaging
Apart from these, the changes include support to fetch the Rx/Tx buffer size using FFA_FEATURES, addition of the FF-A FIDs for v1.2 and some coding style cleanups.
Signed-off-by: Sudeep Holla sudeep.holla@arm.com --- Sudeep Holla (7): firmware: arm_ffa: Some coding style fixes firmware: arm_ffa: Update the FF-A command list with v1.2 additions firmware: arm_ffa: Move the function ffa_features() earlier firmware: arm_ffa: Add support for FFA_PARTITION_INFO_GET_REGS firmware: arm_ffa: Add support for FFA_MSG_SEND_DIRECT_{REQ,RESP}2 firmware: arm_ffa: Add support for FFA_YIELD in direct messaging firmware: arm_ffa: Fetch the Rx/Tx buffer size using ffa_features()
drivers/firmware/arm_ffa/driver.c | 240 +++++++++++++++++++++++++++++--------- include/linux/arm_ffa.h | 12 ++ 2 files changed, 195 insertions(+), 57 deletions(-) --- base-commit: 7c626ce4bae1ac14f60076d00eafe71af30450ba change-id: 20240814-ffa_v1-2-6c33798743f3
Best regards,
These changes fixes a set of below coding style issues: 1. spaces required around that '=' (ctx:VxW) 2. possible unnecessary 'out of memory' message 3. unnecessary for single statement blocks
Signed-off-by: Sudeep Holla sudeep.holla@arm.com --- drivers/firmware/arm_ffa/driver.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index 7ba98c7af2e9..b4b3ecc9824e 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -1242,7 +1242,7 @@ ffa_bus_notifier(struct notifier_block *nb, unsigned long action, void *data)
if (action == BUS_NOTIFY_BIND_DRIVER) { struct ffa_driver *ffa_drv = to_ffa_driver(dev->driver); - const struct ffa_device_id *id_table= ffa_drv->id_table; + const struct ffa_device_id *id_table = ffa_drv->id_table;
/* * FF-A v1.1 provides UUID for each partition as part of the @@ -1327,8 +1327,6 @@ static int ffa_setup_partitions(void) /* Allocate for the host */ info = kzalloc(sizeof(*info), GFP_KERNEL); if (!info) { - pr_err("%s: failed to alloc Host partition ID 0x%x. Abort.\n", - __func__, drv_info->vm_id); /* Already registered devices are freed on bus_exit */ ffa_partitions_cleanup(); return -ENOMEM; @@ -1609,9 +1607,8 @@ static int __init ffa_init(void) return ret;
drv_info = kzalloc(sizeof(*drv_info), GFP_KERNEL); - if (!drv_info) { + if (!drv_info) return -ENOMEM; - }
ret = ffa_version_check(&drv_info->version); if (ret)
Arm Firmware Framework for A-profile(FFA) v1.2 introduces register based discovery mechanism and direct messaging extensions that enables to target specific UUID within a partition.
Let us add all the newly supported FF-A function IDs in the spec. Also update to the error values and associated handling.
Signed-off-by: Sudeep Holla sudeep.holla@arm.com --- drivers/firmware/arm_ffa/driver.c | 1 + include/linux/arm_ffa.h | 5 +++++ 2 files changed, 6 insertions(+)
diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index b4b3ecc9824e..be77e03578cc 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -75,6 +75,7 @@ static const int ffa_linux_errmap[] = { -EAGAIN, /* FFA_RET_RETRY */ -ECANCELED, /* FFA_RET_ABORTED */ -ENODATA, /* FFA_RET_NO_DATA */ + -EAGAIN, /* FFA_RET_NOT_READY */ };
static inline int ffa_to_linux_errno(int errno) diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h index 89683f31ae12..b34f0c0dc2c5 100644 --- a/include/linux/arm_ffa.h +++ b/include/linux/arm_ffa.h @@ -73,6 +73,11 @@ #define FFA_FN64_MEM_PERM_GET FFA_SMC_64(0x88) #define FFA_MEM_PERM_SET FFA_SMC_32(0x89) #define FFA_FN64_MEM_PERM_SET FFA_SMC_64(0x89) +#define FFA_CONSOLE_LOG FFA_SMC_32(0x8A) +#define FFA_PARTITION_INFO_GET_REGS FFA_SMC_64(0x8B) +#define FFA_EL3_INTR_HANDLE FFA_SMC_32(0x8C) +#define FFA_MSG_SEND_DIRECT_REQ2 FFA_SMC_64(0x8D) +#define FFA_MSG_SEND_DIRECT_RESP2 FFA_SMC_64(0x8E)
/* * For some calls it is necessary to use SMC64 to pass or return 64-bit values.
We need to use ffa_features() in ffa_partition_probe() to detect if the newer FFA_PARTITION_INFO_GET_REGS API is supported in the platform or not. To avoid unnecessary forward declaration within the file, let us just move this ffa_features() earlier.
No funtional change.
Signed-off-by: Sudeep Holla sudeep.holla@arm.com --- drivers/firmware/arm_ffa/driver.c | 52 +++++++++++++++++++-------------------- 1 file changed, 26 insertions(+), 26 deletions(-)
diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index be77e03578cc..91681933ece9 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -212,6 +212,32 @@ static int ffa_rxtx_unmap(u16 vm_id) return 0; }
+static int ffa_features(u32 func_feat_id, u32 input_props, + u32 *if_props_1, u32 *if_props_2) +{ + ffa_value_t id; + + if (!ARM_SMCCC_IS_FAST_CALL(func_feat_id) && input_props) { + pr_err("%s: Invalid Parameters: %x, %x", __func__, + func_feat_id, input_props); + return ffa_to_linux_errno(FFA_RET_INVALID_PARAMETERS); + } + + invoke_ffa_fn((ffa_value_t){ + .a0 = FFA_FEATURES, .a1 = func_feat_id, .a2 = input_props, + }, &id); + + if (id.a0 == FFA_ERROR) + return ffa_to_linux_errno((int)id.a2); + + if (if_props_1) + *if_props_1 = id.a2; + if (if_props_2) + *if_props_2 = id.a3; + + return 0; +} + #define PARTITION_INFO_GET_RETURN_COUNT_ONLY BIT(0)
/* buffer must be sizeof(struct ffa_partition_info) * num_partitions */ @@ -598,32 +624,6 @@ static int ffa_memory_reclaim(u64 g_handle, u32 flags) return 0; }
-static int ffa_features(u32 func_feat_id, u32 input_props, - u32 *if_props_1, u32 *if_props_2) -{ - ffa_value_t id; - - if (!ARM_SMCCC_IS_FAST_CALL(func_feat_id) && input_props) { - pr_err("%s: Invalid Parameters: %x, %x", __func__, - func_feat_id, input_props); - return ffa_to_linux_errno(FFA_RET_INVALID_PARAMETERS); - } - - invoke_ffa_fn((ffa_value_t){ - .a0 = FFA_FEATURES, .a1 = func_feat_id, .a2 = input_props, - }, &id); - - if (id.a0 == FFA_ERROR) - return ffa_to_linux_errno((int)id.a2); - - if (if_props_1) - *if_props_1 = id.a2; - if (if_props_2) - *if_props_2 = id.a3; - - return 0; -} - static int ffa_notification_bitmap_create(void) { ffa_value_t ret;
FF-A v1.2 introduced FFA_PARTITION_INFO_GET_REGS which is similar to FFA_PARTITION_INFO_GET except that the former uses the registers to get the required information instead of the Rx buffer which the latter uses.
We need to first check if the platform supports this new API using FFA_FEATURES so that we can fallback to the FFA_PARTITION_INFO_GET (which is mandatory) if FFA_PARTITION_INFO_GET_REGS is not implemented.
Signed-off-by: Sudeep Holla sudeep.holla@arm.com --- drivers/firmware/arm_ffa/driver.c | 72 ++++++++++++++++++++++++++++++++++++--- 1 file changed, 68 insertions(+), 4 deletions(-)
diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index 91681933ece9..e28cbfe9a801 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -287,17 +287,75 @@ __ffa_partition_info_get(u32 uuid0, u32 uuid1, u32 uuid2, u32 uuid3, return count; }
+#define LAST_INDEX_MASK GENMASK(15, 0) +#define CURRENT_INDEX_MASK GENMASK(31, 16) +#define UUID_INFO_TAG_MASK GENMASK(47, 32) +#define PARTITION_INFO_SZ_MASK GENMASK(63, 48) +#define PARTITION_COUNT(x) ((u16)(FIELD_GET(LAST_INDEX_MASK, (x))) + 1) +#define CURRENT_INDEX(x) ((u16)(FIELD_GET(CURRENT_INDEX_MASK, (x)))) +#define UUID_INFO_TAG(x) ((u16)(FIELD_GET(UUID_INFO_TAG_MASK, (x)))) +#define PARTITION_INFO_SZ(x) ((u16)(FIELD_GET(PARTITION_INFO_SZ_MASK, (x)))) +static int +__ffa_partition_info_get_regs(u32 uuid0, u32 uuid1, u32 uuid2, u32 uuid3, + struct ffa_partition_info *buffer, int num_parts) +{ + u16 buf_sz, start_idx, cur_idx, count = 0, prev_idx = 0, tag = 0; + ffa_value_t partition_info; + + do { + start_idx = prev_idx ? prev_idx + 1 : 0; + + invoke_ffa_fn((ffa_value_t){ + .a0 = FFA_PARTITION_INFO_GET_REGS, + .a1 = (u64)uuid1 << 32 | uuid0, + .a2 = (u64)uuid3 << 32 | uuid2, + .a3 = start_idx | tag << 16, + }, &partition_info); + + if (partition_info.a0 == FFA_ERROR) + return ffa_to_linux_errno((int)partition_info.a2); + + if (!count) + count = PARTITION_COUNT(partition_info.a2); + if (!buffer || !num_parts) /* count only */ + return count; + + cur_idx = CURRENT_INDEX(partition_info.a2); + tag = UUID_INFO_TAG(partition_info.a2); + buf_sz = PARTITION_INFO_SZ(partition_info.a2); + if (buf_sz > sizeof(*buffer)) + buf_sz = sizeof(*buffer); + + memcpy(buffer + prev_idx * buf_sz, &partition_info.a3, + (cur_idx - start_idx + 1) * buf_sz); + prev_idx = cur_idx; + + } while (cur_idx < (count - 1)); + + return count; +} + /* buffer is allocated and caller must free the same if returned count > 0 */ static int ffa_partition_probe(const uuid_t *uuid, struct ffa_partition_info **buffer) { int count; u32 uuid0_4[4]; + bool reg_mode = false; struct ffa_partition_info *pbuf;
+ if (!ffa_features(FFA_PARTITION_INFO_GET_REGS, 0, NULL, NULL)) + reg_mode = true; + export_uuid((u8 *)uuid0_4, uuid); - count = __ffa_partition_info_get(uuid0_4[0], uuid0_4[1], uuid0_4[2], - uuid0_4[3], NULL, 0); + if (reg_mode) + count = __ffa_partition_info_get_regs(uuid0_4[0], uuid0_4[1], + uuid0_4[2], uuid0_4[3], + NULL, 0); + else + count = __ffa_partition_info_get(uuid0_4[0], uuid0_4[1], + uuid0_4[2], uuid0_4[3], + NULL, 0); if (count <= 0) return count;
@@ -305,8 +363,14 @@ ffa_partition_probe(const uuid_t *uuid, struct ffa_partition_info **buffer) if (!pbuf) return -ENOMEM;
- count = __ffa_partition_info_get(uuid0_4[0], uuid0_4[1], uuid0_4[2], - uuid0_4[3], pbuf, count); + if (reg_mode) + count = __ffa_partition_info_get_regs(uuid0_4[0], uuid0_4[1], + uuid0_4[2], uuid0_4[3], + pbuf, count); + else + count = __ffa_partition_info_get(uuid0_4[0], uuid0_4[1], + uuid0_4[2], uuid0_4[3], + pbuf, count); if (count <= 0) kfree(pbuf); else
FFA_MSG_SEND_DIRECT_{REQ,RESP} supported only x3-x7 to pass implementation defined values as part of the message. This may not be sufficient sometimes and also it would be good to use all the registers supported by SMCCC v1.2 (x0-x17) for such register based communication.
Also another limitation with the FFA_MSG_SEND_DIRECT_{REQ,RESP} is the ability to target a specific service within the partition based on it's UUID.
In order to address both of the above limitation, FF-A v1.2 introduced FFA_MSG_SEND_DIRECT_{REQ,RESP}2 which has the ability to target the message to a specific service based on its UUID within a partition as well as utilise all the available registers(x4-x17 specifically) for the communication.
This change adds support for FFA_MSG_SEND_DIRECT_REQ2 and FFA_MSG_SEND_DIRECT_RESP2.
Signed-off-by: Sudeep Holla sudeep.holla@arm.com --- drivers/firmware/arm_ffa/driver.c | 49 +++++++++++++++++++++++++++++++++++++-- include/linux/arm_ffa.h | 7 ++++++ 2 files changed, 54 insertions(+), 2 deletions(-)
diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index e28cbfe9a801..8af41be4b1c1 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -99,6 +99,7 @@ struct ffa_drv_info { void *rx_buffer; void *tx_buffer; bool mem_ops_native; + bool msg_direct_req2_supp; bool bitmap_created; bool notif_enabled; unsigned int sched_recv_irq; @@ -468,6 +469,35 @@ static int ffa_msg_send2(u16 src_id, u16 dst_id, void *buf, size_t sz) return retval; }
+static int ffa_msg_send_direct_req2(u16 src_id, u16 dst_id, const uuid_t *uuid, + struct ffa_send_direct_data2 *data) +{ + u32 src_dst_ids = PACK_TARGET_INFO(src_id, dst_id); + ffa_value_t ret, args = { + .a0 = FFA_MSG_SEND_DIRECT_REQ2, .a1 = src_dst_ids, + }; + + export_uuid((u8 *)&args.a2, uuid); + memcpy(&args.a4, data, sizeof(*data)); + + invoke_ffa_fn(args, &ret); + + while (ret.a0 == FFA_INTERRUPT) + invoke_ffa_fn((ffa_value_t){ + .a0 = FFA_RUN, .a1 = ret.a1, + }, &ret); + + if (ret.a0 == FFA_ERROR) + return ffa_to_linux_errno((int)ret.a2); + + if (ret.a0 == FFA_MSG_SEND_DIRECT_RESP2) { + memcpy(data, &args.a4, sizeof(*data)); + return 0; + } + + return -EINVAL; +} + static int ffa_mem_first_frag(u32 func_id, phys_addr_t buf, u32 buf_sz, u32 frag_len, u32 len, u64 *handle) { @@ -923,11 +953,15 @@ static int ffa_run(struct ffa_device *dev, u16 vcpu) return 0; }
-static void ffa_set_up_mem_ops_native_flag(void) +static void ffa_drvinfo_flags_init(void) { if (!ffa_features(FFA_FN_NATIVE(MEM_LEND), 0, NULL, NULL) || !ffa_features(FFA_FN_NATIVE(MEM_SHARE), 0, NULL, NULL)) drv_info->mem_ops_native = true; + + if (!ffa_features(FFA_MSG_SEND_DIRECT_REQ2, 0, NULL, NULL) || + !ffa_features(FFA_MSG_SEND_DIRECT_RESP2, 0, NULL, NULL)) + drv_info->msg_direct_req2_supp = true; }
static u32 ffa_api_version_get(void) @@ -973,6 +1007,16 @@ static int ffa_indirect_msg_send(struct ffa_device *dev, void *buf, size_t sz) return ffa_msg_send2(drv_info->vm_id, dev->vm_id, buf, sz); }
+static int ffa_sync_send_receive2(struct ffa_device *dev, const uuid_t *uuid, + struct ffa_send_direct_data2 *data) +{ + if (!drv_info->msg_direct_req2_supp) + return -EOPNOTSUPP; + + return ffa_msg_send_direct_req2(drv_info->vm_id, dev->vm_id, + uuid, data); +} + static int ffa_memory_share(struct ffa_mem_ops_args *args) { if (drv_info->mem_ops_native) @@ -1256,6 +1300,7 @@ static const struct ffa_msg_ops ffa_drv_msg_ops = { .mode_32bit_set = ffa_mode_32bit_set, .sync_send_receive = ffa_sync_send_receive, .indirect_send = ffa_indirect_msg_send, + .sync_send_receive2 = ffa_sync_send_receive2, };
static const struct ffa_mem_ops ffa_drv_mem_ops = { @@ -1708,7 +1753,7 @@ static int __init ffa_init(void) mutex_init(&drv_info->rx_lock); mutex_init(&drv_info->tx_lock);
- ffa_set_up_mem_ops_native_flag(); + ffa_drvinfo_flags_init();
ffa_notifications_setup();
diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h index b34f0c0dc2c5..a28e2a6a13d0 100644 --- a/include/linux/arm_ffa.h +++ b/include/linux/arm_ffa.h @@ -270,6 +270,11 @@ struct ffa_indirect_msg_hdr { u32 size; };
+/* For use with FFA_MSG_SEND_DIRECT_{REQ,RESP}2 which pass data via registers */ +struct ffa_send_direct_data2 { + unsigned long data[14]; /* x4-x17 */ +}; + struct ffa_mem_region_addr_range { /* The base IPA of the constituent memory region, aligned to 4 kiB */ u64 address; @@ -431,6 +436,8 @@ struct ffa_msg_ops { int (*sync_send_receive)(struct ffa_device *dev, struct ffa_send_direct_data *data); int (*indirect_send)(struct ffa_device *dev, void *buf, size_t sz); + int (*sync_send_receive2)(struct ffa_device *dev, const uuid_t *uuid, + struct ffa_send_direct_data2 *data); };
struct ffa_mem_ops {
Successful completion of both direct messaging function can be indicated through an invocation of FFA_YIELD or GGA_INTERRUPT by the callee.
FFA_INTERRUPT indicates that the direct request was interrupted and must be resumed through the FFA_RUN interface which is already done in the driver.
FFA_YIELD indicates that the receiver endpoint has transitioned to the blocked runtime state and must be resumed through the FFA_RUN interface. However, the way receiver endpoint gets unblocked is implementation defined. So, the driver just sleeps for 1 - 2ms and issues FFA_RUN. It can return to the caller with FFA_YIELD is the receiver endpoint is still blocked.
Signed-off-by: Sudeep Holla sudeep.holla@arm.com --- drivers/firmware/arm_ffa/driver.c | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-)
diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index 8af41be4b1c1..90102ed7bd18 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -26,6 +26,7 @@ #include <linux/arm_ffa.h> #include <linux/bitfield.h> #include <linux/cpuhotplug.h> +#include <linux/delay.h> #include <linux/device.h> #include <linux/hashtable.h> #include <linux/interrupt.h> @@ -397,6 +398,18 @@ static int ffa_id_get(u16 *vm_id) return 0; }
+static inline void ffa_msg_send_wait_for_completion(ffa_value_t *ret) +{ + while (ret->a0 == FFA_INTERRUPT || ret->a0 == FFA_YIELD) { + if (ret->a0 == FFA_YIELD) + fsleep(1000); + + invoke_ffa_fn((ffa_value_t){ + .a0 = FFA_RUN, .a1 = ret->a1, + }, ret); + } +} + static int ffa_msg_send_direct_req(u16 src_id, u16 dst_id, bool mode_32bit, struct ffa_send_direct_data *data) { @@ -417,10 +430,7 @@ static int ffa_msg_send_direct_req(u16 src_id, u16 dst_id, bool mode_32bit, .a6 = data->data3, .a7 = data->data4, }, &ret);
- while (ret.a0 == FFA_INTERRUPT) - invoke_ffa_fn((ffa_value_t){ - .a0 = FFA_RUN, .a1 = ret.a1, - }, &ret); + ffa_msg_send_wait_for_completion(&ret);
if (ret.a0 == FFA_ERROR) return ffa_to_linux_errno((int)ret.a2); @@ -482,10 +492,7 @@ static int ffa_msg_send_direct_req2(u16 src_id, u16 dst_id, const uuid_t *uuid,
invoke_ffa_fn(args, &ret);
- while (ret.a0 == FFA_INTERRUPT) - invoke_ffa_fn((ffa_value_t){ - .a0 = FFA_RUN, .a1 = ret.a1, - }, &ret); + ffa_msg_send_wait_for_completion(&ret);
if (ret.a0 == FFA_ERROR) return ffa_to_linux_errno((int)ret.a2);
An endpoint can discover the minimum size, maximum size and alignment boundary for the Rx/Tx buffers by passing the function ID of the FFA_RXTX_MAP ABI as input in the FFA_FEATURES interface. The maximum size is an optional field and a value of 0 means that the partition manager or the hypervisor does not enforce a maximum size.
Use the discovery mechanism and remove the hardcoded 4kB buffer size. If the discovery fails, it still defaults to 4kB.
Signed-off-by: Sudeep Holla sudeep.holla@arm.com --- drivers/firmware/arm_ffa/driver.c | 44 +++++++++++++++++++++++++-------------- 1 file changed, 28 insertions(+), 16 deletions(-)
diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index 90102ed7bd18..1e3764852118 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -54,11 +54,8 @@ #define PACK_TARGET_INFO(s, r) \ (FIELD_PREP(SENDER_ID_MASK, (s)) | FIELD_PREP(RECEIVER_ID_MASK, (r)))
-/* - * Keeping RX TX buffer size as 4K for now - * 64K may be preferred to keep it min a page in 64K PAGE_SIZE config - */ -#define RXTX_BUFFER_SIZE SZ_4K +#define RXTX_MAP_MIN_BUFSZ_MASK GENMASK(1, 0) +#define RXTX_MAP_MIN_BUFSZ(x) ((x) & RXTX_MAP_MIN_BUFSZ_MASK)
#define FFA_MAX_NOTIFICATIONS 64
@@ -99,6 +96,7 @@ struct ffa_drv_info { struct mutex tx_lock; /* lock to protect Tx buffer */ void *rx_buffer; void *tx_buffer; + size_t rxtx_bufsz; bool mem_ops_native; bool msg_direct_req2_supp; bool bitmap_created; @@ -454,7 +452,7 @@ static int ffa_msg_send2(u16 src_id, u16 dst_id, void *buf, size_t sz) ffa_value_t ret; int retval = 0;
- if (sz > (RXTX_BUFFER_SIZE - sizeof(*msg))) + if (sz > (drv_info->rxtx_bufsz - sizeof(*msg))) return -ERANGE;
mutex_lock(&drv_info->tx_lock); @@ -689,9 +687,10 @@ static int ffa_memory_ops(u32 func_id, struct ffa_mem_ops_args *args) { int ret; void *buffer; + size_t rxtx_bufsz = drv_info->rxtx_bufsz;
if (!args->use_txbuf) { - buffer = alloc_pages_exact(RXTX_BUFFER_SIZE, GFP_KERNEL); + buffer = alloc_pages_exact(rxtx_bufsz, GFP_KERNEL); if (!buffer) return -ENOMEM; } else { @@ -699,12 +698,12 @@ static int ffa_memory_ops(u32 func_id, struct ffa_mem_ops_args *args) mutex_lock(&drv_info->tx_lock); }
- ret = ffa_setup_and_transmit(func_id, buffer, RXTX_BUFFER_SIZE, args); + ret = ffa_setup_and_transmit(func_id, buffer, rxtx_bufsz, args);
if (args->use_txbuf) mutex_unlock(&drv_info->tx_lock); else - free_pages_exact(buffer, RXTX_BUFFER_SIZE); + free_pages_exact(buffer, rxtx_bufsz);
return ret < 0 ? ret : 0; } @@ -1718,6 +1717,8 @@ static void ffa_notifications_setup(void) static int __init ffa_init(void) { int ret; + u32 buf_sz; + size_t rxtx_bufsz = SZ_4K;
ret = ffa_transport_init(&invoke_ffa_fn); if (ret) @@ -1737,13 +1738,24 @@ static int __init ffa_init(void) goto free_drv_info; }
- drv_info->rx_buffer = alloc_pages_exact(RXTX_BUFFER_SIZE, GFP_KERNEL); + ret = ffa_features(FFA_FN_NATIVE(RXTX_MAP), 0, &buf_sz, NULL); + if (!ret) { + if (RXTX_MAP_MIN_BUFSZ(buf_sz) == 1) + rxtx_bufsz = SZ_64K; + else if (RXTX_MAP_MIN_BUFSZ(buf_sz) == 2) + rxtx_bufsz = SZ_16K; + else + rxtx_bufsz = SZ_4K; + } + + drv_info->rxtx_bufsz = rxtx_bufsz; + drv_info->rx_buffer = alloc_pages_exact(rxtx_bufsz, GFP_KERNEL); if (!drv_info->rx_buffer) { ret = -ENOMEM; goto free_pages; }
- drv_info->tx_buffer = alloc_pages_exact(RXTX_BUFFER_SIZE, GFP_KERNEL); + drv_info->tx_buffer = alloc_pages_exact(rxtx_bufsz, GFP_KERNEL); if (!drv_info->tx_buffer) { ret = -ENOMEM; goto free_pages; @@ -1751,7 +1763,7 @@ static int __init ffa_init(void)
ret = ffa_rxtx_map(virt_to_phys(drv_info->tx_buffer), virt_to_phys(drv_info->rx_buffer), - RXTX_BUFFER_SIZE / FFA_PAGE_SIZE); + rxtx_bufsz / FFA_PAGE_SIZE); if (ret) { pr_err("failed to register FFA RxTx buffers\n"); goto free_pages; @@ -1781,8 +1793,8 @@ static int __init ffa_init(void) ffa_notifications_cleanup(); free_pages: if (drv_info->tx_buffer) - free_pages_exact(drv_info->tx_buffer, RXTX_BUFFER_SIZE); - free_pages_exact(drv_info->rx_buffer, RXTX_BUFFER_SIZE); + free_pages_exact(drv_info->tx_buffer, rxtx_bufsz); + free_pages_exact(drv_info->rx_buffer, rxtx_bufsz); free_drv_info: kfree(drv_info); return ret; @@ -1794,8 +1806,8 @@ static void __exit ffa_exit(void) ffa_notifications_cleanup(); ffa_partitions_cleanup(); ffa_rxtx_unmap(drv_info->vm_id); - free_pages_exact(drv_info->tx_buffer, RXTX_BUFFER_SIZE); - free_pages_exact(drv_info->rx_buffer, RXTX_BUFFER_SIZE); + free_pages_exact(drv_info->tx_buffer, drv_info->rxtx_bufsz); + free_pages_exact(drv_info->rx_buffer, drv_info->rxtx_bufsz); kfree(drv_info); } module_exit(ffa_exit);
op-tee@lists.trustedfirmware.org
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Sudeep Holla