| From 996e6bae70ec2ce04061daab23f20e9c353c4227 Mon Sep 17 00:00:00 2001 |
| From: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com> |
| Date: Tue, 18 Jan 2022 15:11:46 +0000 |
| Subject: [PATCH 34/40] ANDROID: trusty-ffa: Add support for FFA memory |
| operations |
| |
| Initializes Trusty mem_ops with FFA memory operations for share, |
| lend, reclaim. |
| |
| Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com> |
| Change-Id: Id3a1eb5ae8e4721cb983c624773d39bafe25a77d |
| Upstream-Status: Pending [Not submitted to upstream yet] |
| Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com |
| --- |
| drivers/trusty/trusty-ffa.c | 102 ++++++++++++++++++++++++++++++++++++ |
| drivers/trusty/trusty.c | 5 ++ |
| 2 files changed, 107 insertions(+) |
| |
| diff --git a/drivers/trusty/trusty-ffa.c b/drivers/trusty/trusty-ffa.c |
| index c8c16a1fc700..0655b3887b52 100644 |
| --- a/drivers/trusty/trusty-ffa.c |
| +++ b/drivers/trusty/trusty-ffa.c |
| @@ -15,8 +15,110 @@ |
| #include "trusty-ffa.h" |
| #include "trusty-private.h" |
| |
| +static int __trusty_ffa_share_memory(struct device *dev, u64 *id, |
| + struct scatterlist *sglist, |
| + unsigned int nents, pgprot_t pgprot, |
| + u64 tag, bool share) |
| +{ |
| + struct trusty_state *s = platform_get_drvdata(to_platform_device(dev)); |
| + int ret; |
| + struct scatterlist *sg; |
| + size_t count; |
| + struct ffa_device *ffa_dev = to_ffa_dev(s->ffa->dev); |
| + const struct ffa_dev_ops *ffa_ops = s->ffa->ops; |
| + struct ffa_mem_region_attributes ffa_mem_attr; |
| + struct ffa_mem_ops_args ffa_mem_args; |
| + |
| + if (WARN_ON(nents < 1)) |
| + return -EINVAL; |
| + |
| + count = dma_map_sg(dev, sglist, nents, DMA_BIDIRECTIONAL); |
| + if (count != nents) { |
| + dev_err(s->dev, "failed to dma map sg_table\n"); |
| + return -EINVAL; |
| + } |
| + |
| + sg = sglist; |
| + |
| + mutex_lock(&s->ffa->share_memory_msg_lock); |
| + |
| + ffa_mem_attr.receiver = ffa_dev->vm_id; |
| + ffa_mem_attr.attrs = FFA_MEM_RW; |
| + |
| + ffa_mem_args.use_txbuf = 1; |
| + ffa_mem_args.tag = tag; |
| + ffa_mem_args.attrs = &ffa_mem_attr; |
| + ffa_mem_args.nattrs = 1; |
| + ffa_mem_args.sg = sg; |
| + ffa_mem_args.flags = 0; |
| + |
| + if (share) { |
| + ret = ffa_ops->memory_share(ffa_dev, &ffa_mem_args); |
| + } else { |
| + ret = ffa_ops->memory_lend(ffa_dev, &ffa_mem_args); |
| + } |
| + |
| + mutex_unlock(&s->ffa->share_memory_msg_lock); |
| + |
| + if (!ret) { |
| + *id = ffa_mem_args.g_handle; |
| + dev_dbg(s->dev, "%s: done\n", __func__); |
| + return 0; |
| + } |
| + |
| + dev_err(s->dev, "%s: failed %d", __func__, ret); |
| + |
| + dma_unmap_sg(dev, sglist, nents, DMA_BIDIRECTIONAL); |
| + return ret; |
| +} |
| + |
| +static int trusty_ffa_share_memory(struct device *dev, u64 *id, |
| + struct scatterlist *sglist, |
| + unsigned int nents, pgprot_t pgprot, u64 tag) |
| +{ |
| + return __trusty_ffa_share_memory(dev, id, sglist, nents, pgprot, tag, |
| + true); |
| +} |
| + |
| +static int trusty_ffa_lend_memory(struct device *dev, u64 *id, |
| + struct scatterlist *sglist, |
| + unsigned int nents, pgprot_t pgprot, u64 tag) |
| +{ |
| + return __trusty_ffa_share_memory(dev, id, sglist, nents, pgprot, tag, |
| + false); |
| +} |
| + |
| +static int trusty_ffa_reclaim_memory(struct device *dev, u64 id, |
| + struct scatterlist *sglist, |
| + unsigned int nents) |
| +{ |
| + struct trusty_state *s = platform_get_drvdata(to_platform_device(dev)); |
| + int ret = 0; |
| + const struct ffa_dev_ops *ffa_ops = s->ffa->ops; |
| + |
| + if (WARN_ON(nents < 1)) |
| + return -EINVAL; |
| + |
| + mutex_lock(&s->ffa->share_memory_msg_lock); |
| + |
| + ret = ffa_ops->memory_reclaim(id, 0); |
| + |
| + mutex_unlock(&s->ffa->share_memory_msg_lock); |
| + |
| + if (ret != 0) |
| + return ret; |
| + |
| + dma_unmap_sg(dev, sglist, nents, DMA_BIDIRECTIONAL); |
| + |
| + dev_dbg(s->dev, "%s: done\n", __func__); |
| + return 0; |
| +} |
| + |
| static const struct trusty_mem_ops trusty_ffa_mem_ops = { |
| .desc = &trusty_ffa_transport, |
| + .trusty_share_memory = &trusty_ffa_share_memory, |
| + .trusty_lend_memory = &trusty_ffa_lend_memory, |
| + .trusty_reclaim_memory = &trusty_ffa_reclaim_memory, |
| }; |
| |
| static const struct ffa_device_id trusty_ffa_device_id[] = { |
| diff --git a/drivers/trusty/trusty.c b/drivers/trusty/trusty.c |
| index 4686b0d34f61..f91c255c9897 100644 |
| --- a/drivers/trusty/trusty.c |
| +++ b/drivers/trusty/trusty.c |
| @@ -674,6 +674,11 @@ static int trusty_remove(struct platform_device *pdev) |
| * |
| * For Trusty API version < TRUSTY_API_VERSION_MEM_OBJ: |
| * trusty_smc_transport used for messaging. |
| + * |
| + * For Trusty API version == TRUSTY_API_VERSION_MEM_OBJ: |
| + * trusty_smc_transport used for messaging. |
| + * trusty_ffa_transport used for memory sharing. |
| + * |
| */ |
| static const trusty_transports_t trusty_transports[] = { |
| &trusty_smc_transport, |
| -- |
| 2.34.1 |
| |