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path: root/drivers/infiniband/hw/cxgb4/mem.c
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Diffstat (limited to 'drivers/infiniband/hw/cxgb4/mem.c')
-rw-r--r--drivers/infiniband/hw/cxgb4/mem.c155
1 files changed, 144 insertions, 11 deletions
diff --git a/drivers/infiniband/hw/cxgb4/mem.c b/drivers/infiniband/hw/cxgb4/mem.c
index 903a92d6f91..4cb8eb24497 100644
--- a/drivers/infiniband/hw/cxgb4/mem.c
+++ b/drivers/infiniband/hw/cxgb4/mem.c
@@ -30,16 +30,76 @@
* SOFTWARE.
*/
+#include <linux/module.h>
+#include <linux/moduleparam.h>
#include <rdma/ib_umem.h>
#include <linux/atomic.h>
#include "iw_cxgb4.h"
+int use_dsgl = 1;
+module_param(use_dsgl, int, 0644);
+MODULE_PARM_DESC(use_dsgl, "Use DSGL for PBL/FastReg (default=1)");
+
#define T4_ULPTX_MIN_IO 32
#define C4IW_MAX_INLINE_SIZE 96
+#define T4_ULPTX_MAX_DMA 1024
+#define C4IW_INLINE_THRESHOLD 128
-static int write_adapter_mem(struct c4iw_rdev *rdev, u32 addr, u32 len,
- void *data)
+static int inline_threshold = C4IW_INLINE_THRESHOLD;
+module_param(inline_threshold, int, 0644);
+MODULE_PARM_DESC(inline_threshold, "inline vs dsgl threshold (default=128)");
+
+static int _c4iw_write_mem_dma_aligned(struct c4iw_rdev *rdev, u32 addr,
+ u32 len, dma_addr_t data, int wait)
+{
+ struct sk_buff *skb;
+ struct ulp_mem_io *req;
+ struct ulptx_sgl *sgl;
+ u8 wr_len;
+ int ret = 0;
+ struct c4iw_wr_wait wr_wait;
+
+ addr &= 0x7FFFFFF;
+
+ if (wait)
+ c4iw_init_wr_wait(&wr_wait);
+ wr_len = roundup(sizeof(*req) + sizeof(*sgl), 16);
+
+ skb = alloc_skb(wr_len, GFP_KERNEL | __GFP_NOFAIL);
+ if (!skb)
+ return -ENOMEM;
+ set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0);
+
+ req = (struct ulp_mem_io *)__skb_put(skb, wr_len);
+ memset(req, 0, wr_len);
+ INIT_ULPTX_WR(req, wr_len, 0, 0);
+ req->wr.wr_hi = cpu_to_be32(FW_WR_OP(FW_ULPTX_WR) |
+ (wait ? FW_WR_COMPL(1) : 0));
+ req->wr.wr_lo = wait ? (__force __be64)&wr_wait : 0;
+ req->wr.wr_mid = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(wr_len, 16)));
+ req->cmd = cpu_to_be32(ULPTX_CMD(ULP_TX_MEM_WRITE));
+ req->cmd |= cpu_to_be32(V_T5_ULP_MEMIO_ORDER(1));
+ req->dlen = cpu_to_be32(ULP_MEMIO_DATA_LEN(len>>5));
+ req->len16 = cpu_to_be32(DIV_ROUND_UP(wr_len-sizeof(req->wr), 16));
+ req->lock_addr = cpu_to_be32(ULP_MEMIO_ADDR(addr));
+
+ sgl = (struct ulptx_sgl *)(req + 1);
+ sgl->cmd_nsge = cpu_to_be32(ULPTX_CMD(ULP_TX_SC_DSGL) |
+ ULPTX_NSGE(1));
+ sgl->len0 = cpu_to_be32(len);
+ sgl->addr0 = cpu_to_be64(data);
+
+ ret = c4iw_ofld_send(rdev, skb);
+ if (ret)
+ return ret;
+ if (wait)
+ ret = c4iw_wait_for_reply(rdev, &wr_wait, 0, 0, __func__);
+ return ret;
+}
+
+static int _c4iw_write_mem_inline(struct c4iw_rdev *rdev, u32 addr, u32 len,
+ void *data)
{
struct sk_buff *skb;
struct ulp_mem_io *req;
@@ -47,6 +107,12 @@ static int write_adapter_mem(struct c4iw_rdev *rdev, u32 addr, u32 len,
u8 wr_len, *to_dp, *from_dp;
int copy_len, num_wqe, i, ret = 0;
struct c4iw_wr_wait wr_wait;
+ __be32 cmd = cpu_to_be32(ULPTX_CMD(ULP_TX_MEM_WRITE));
+
+ if (is_t4(rdev->lldi.adapter_type))
+ cmd |= cpu_to_be32(ULP_MEMIO_ORDER(1));
+ else
+ cmd |= cpu_to_be32(V_T5_ULP_MEMIO_IMM(1));
addr &= 0x7FFFFFF;
PDBG("%s addr 0x%x len %u\n", __func__, addr, len);
@@ -77,7 +143,7 @@ static int write_adapter_mem(struct c4iw_rdev *rdev, u32 addr, u32 len,
req->wr.wr_mid = cpu_to_be32(
FW_WR_LEN16(DIV_ROUND_UP(wr_len, 16)));
- req->cmd = cpu_to_be32(ULPTX_CMD(ULP_TX_MEM_WRITE) | (1<<23));
+ req->cmd = cmd;
req->dlen = cpu_to_be32(ULP_MEMIO_DATA_LEN(
DIV_ROUND_UP(copy_len, T4_ULPTX_MIN_IO)));
req->len16 = cpu_to_be32(DIV_ROUND_UP(wr_len-sizeof(req->wr),
@@ -107,6 +173,67 @@ static int write_adapter_mem(struct c4iw_rdev *rdev, u32 addr, u32 len,
return ret;
}
+int _c4iw_write_mem_dma(struct c4iw_rdev *rdev, u32 addr, u32 len, void *data)
+{
+ u32 remain = len;
+ u32 dmalen;
+ int ret = 0;
+ dma_addr_t daddr;
+ dma_addr_t save;
+
+ daddr = dma_map_single(&rdev->lldi.pdev->dev, data, len, DMA_TO_DEVICE);
+ if (dma_mapping_error(&rdev->lldi.pdev->dev, daddr))
+ return -1;
+ save = daddr;
+
+ while (remain > inline_threshold) {
+ if (remain < T4_ULPTX_MAX_DMA) {
+ if (remain & ~T4_ULPTX_MIN_IO)
+ dmalen = remain & ~(T4_ULPTX_MIN_IO-1);
+ else
+ dmalen = remain;
+ } else
+ dmalen = T4_ULPTX_MAX_DMA;
+ remain -= dmalen;
+ ret = _c4iw_write_mem_dma_aligned(rdev, addr, dmalen, daddr,
+ !remain);
+ if (ret)
+ goto out;
+ addr += dmalen >> 5;
+ data += dmalen;
+ daddr += dmalen;
+ }
+ if (remain)
+ ret = _c4iw_write_mem_inline(rdev, addr, remain, data);
+out:
+ dma_unmap_single(&rdev->lldi.pdev->dev, save, len, DMA_TO_DEVICE);
+ return ret;
+}
+
+/*
+ * write len bytes of data into addr (32B aligned address)
+ * If data is NULL, clear len byte of memory to zero.
+ */
+static int write_adapter_mem(struct c4iw_rdev *rdev, u32 addr, u32 len,
+ void *data)
+{
+ if (is_t5(rdev->lldi.adapter_type) && use_dsgl) {
+ if (len > inline_threshold) {
+ if (_c4iw_write_mem_dma(rdev, addr, len, data)) {
+ printk_ratelimited(KERN_WARNING
+ "%s: dma map"
+ " failure (non fatal)\n",
+ pci_name(rdev->lldi.pdev));
+ return _c4iw_write_mem_inline(rdev, addr, len,
+ data);
+ } else
+ return 0;
+ } else
+ return _c4iw_write_mem_inline(rdev, addr, len, data);
+ } else
+ return _c4iw_write_mem_inline(rdev, addr, len, data);
+}
+
/*
* Build and write a TPT entry.
* IN: stag key, pdid, perm, bind_enabled, zbva, to, len, page_size,
@@ -760,19 +887,23 @@ struct ib_fast_reg_page_list *c4iw_alloc_fastreg_pbl(struct ib_device *device,
struct c4iw_fr_page_list *c4pl;
struct c4iw_dev *dev = to_c4iw_dev(device);
dma_addr_t dma_addr;
- int size = sizeof *c4pl + page_list_len * sizeof(u64);
+ int pll_len = roundup(page_list_len * sizeof(u64), 32);
- c4pl = dma_alloc_coherent(&dev->rdev.lldi.pdev->dev, size,
- &dma_addr, GFP_KERNEL);
+ c4pl = kmalloc(sizeof(*c4pl), GFP_KERNEL);
if (!c4pl)
return ERR_PTR(-ENOMEM);
+ c4pl->ibpl.page_list = dma_alloc_coherent(&dev->rdev.lldi.pdev->dev,
+ pll_len, &dma_addr,
+ GFP_KERNEL);
+ if (!c4pl->ibpl.page_list) {
+ kfree(c4pl);
+ return ERR_PTR(-ENOMEM);
+ }
dma_unmap_addr_set(c4pl, mapping, dma_addr);
c4pl->dma_addr = dma_addr;
c4pl->dev = dev;
- c4pl->size = size;
- c4pl->ibpl.page_list = (u64 *)(c4pl + 1);
- c4pl->ibpl.max_page_list_len = page_list_len;
+ c4pl->ibpl.max_page_list_len = pll_len;
return &c4pl->ibpl;
}
@@ -781,8 +912,10 @@ void c4iw_free_fastreg_pbl(struct ib_fast_reg_page_list *ibpl)
{
struct c4iw_fr_page_list *c4pl = to_c4iw_fr_page_list(ibpl);
- dma_free_coherent(&c4pl->dev->rdev.lldi.pdev->dev, c4pl->size,
- c4pl, dma_unmap_addr(c4pl, mapping));
+ dma_free_coherent(&c4pl->dev->rdev.lldi.pdev->dev,
+ c4pl->ibpl.max_page_list_len,
+ c4pl->ibpl.page_list, dma_unmap_addr(c4pl, mapping));
+ kfree(c4pl);
}
int c4iw_dereg_mr(struct ib_mr *ib_mr)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-23 18:20:26 +0000