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habanalabs: support device memory memset > 4GB 

This patch adds support to the goya memset function to perform memset to
device memory with size larger then 4GB. In this case, we need to use
multiple LIN_DMA packets because a single packet supports up to 4GB.

Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Oded Gabbay 2019-05-16 10:39:10 +03:00
parent 460696ed4c
commit ac74273771
1 changed files with 29 additions and 18 deletions
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47
drivers/misc/habanalabs/goya/goya.c
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@ -4478,36 +4478,47 @@ void *goya_get_events_stat(struct hl_device *hdev, u32 *size)
return goya->events_stat;
}
static int goya_memset_device_memory(struct hl_device *hdev, u64 addr, u32 size,
static int goya_memset_device_memory(struct hl_device *hdev, u64 addr, u64 size,
u64 val, bool is_dram)
{
struct packet_lin_dma *lin_dma_pkt;
struct hl_cs_job *job;
u32 cb_size, ctl;
struct hl_cb *cb;
int rc;
int rc, lin_dma_pkts_cnt;
cb = hl_cb_kernel_create(hdev, PAGE_SIZE);
lin_dma_pkts_cnt = DIV_ROUND_UP_ULL(size, SZ_2G);
cb_size = lin_dma_pkts_cnt * sizeof(struct packet_lin_dma) +
sizeof(struct packet_msg_prot);
cb = hl_cb_kernel_create(hdev, cb_size);
if (!cb)
return -EFAULT;
return -ENOMEM;
lin_dma_pkt = (struct packet_lin_dma *) (uintptr_t) cb->kernel_address;
memset(lin_dma_pkt, 0, sizeof(*lin_dma_pkt));
cb_size = sizeof(*lin_dma_pkt);
do {
memset(lin_dma_pkt, 0, sizeof(*lin_dma_pkt));
ctl = ((PACKET_LIN_DMA << GOYA_PKT_CTL_OPCODE_SHIFT) |
(1 << GOYA_PKT_LIN_DMA_CTL_MEMSET_SHIFT) |
(1 << GOYA_PKT_LIN_DMA_CTL_WO_SHIFT) |
(1 << GOYA_PKT_CTL_RB_SHIFT) |
(1 << GOYA_PKT_CTL_MB_SHIFT));
ctl |= (is_dram ? DMA_HOST_TO_DRAM : DMA_HOST_TO_SRAM) <<
GOYA_PKT_LIN_DMA_CTL_DMA_DIR_SHIFT;
lin_dma_pkt->ctl = cpu_to_le32(ctl);
ctl = ((PACKET_LIN_DMA << GOYA_PKT_CTL_OPCODE_SHIFT) |
(1 << GOYA_PKT_LIN_DMA_CTL_MEMSET_SHIFT) |
(1 << GOYA_PKT_LIN_DMA_CTL_WO_SHIFT) |
(1 << GOYA_PKT_CTL_RB_SHIFT) |
(1 << GOYA_PKT_CTL_MB_SHIFT));
ctl |= (is_dram ? DMA_HOST_TO_DRAM : DMA_HOST_TO_SRAM) <<
GOYA_PKT_LIN_DMA_CTL_DMA_DIR_SHIFT;
lin_dma_pkt->ctl = cpu_to_le32(ctl);
lin_dma_pkt->src_addr = cpu_to_le64(val);
lin_dma_pkt->dst_addr = cpu_to_le64(addr);
lin_dma_pkt->tsize = cpu_to_le32(size);
lin_dma_pkt->src_addr = cpu_to_le64(val);
lin_dma_pkt->dst_addr = cpu_to_le64(addr);
if (lin_dma_pkts_cnt > 1)
lin_dma_pkt->tsize = cpu_to_le32(SZ_2G);
else
lin_dma_pkt->tsize = cpu_to_le32(size);
size -= SZ_2G;
addr += SZ_2G;
lin_dma_pkt++;
} while (--lin_dma_pkts_cnt);
job = hl_cs_allocate_job(hdev, true);
if (!job) {
@ -4522,7 +4533,7 @@ static int goya_memset_device_memory(struct hl_device *hdev, u64 addr, u32 size,
job->user_cb_size = cb_size;
job->hw_queue_id = GOYA_QUEUE_ID_DMA_0;
job->patched_cb = job->user_cb;
job->job_cb_size = job->user_cb_size + sizeof(struct packet_msg_prot);
job->job_cb_size = job->user_cb_size;
hl_debugfs_add_job(hdev, job);