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authorVarun Prakash <varun@chelsio.com>2019-06-10 18:36:34 +0530
committerDavid S. Miller <davem@davemloft.net>2019-06-10 09:20:23 -0700
commita248384e6420ebda63f788d33fac1c0a081e57a8 (patch)
treea9c39190e749e184fcda98d85f54777bfee9a980 /drivers/net/ethernet/chelsio/libcxgb
parentba217a44f815ae06226461ab74a9df09b35e5a5f (diff)
cxgb4/libcxgb/cxgb4i/cxgbit: enable eDRAM page pods for iSCSI
Page pods are used for direct data placement, this patch enables eDRAM page pods if firmware supports this feature. Signed-off-by: Varun Prakash <varun@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/chelsio/libcxgb')
-rw-r--r--drivers/net/ethernet/chelsio/libcxgb/libcxgb_ppm.c47
-rw-r--r--drivers/net/ethernet/chelsio/libcxgb/libcxgb_ppm.h7
2 files changed, 43 insertions, 11 deletions
diff --git a/drivers/net/ethernet/chelsio/libcxgb/libcxgb_ppm.c b/drivers/net/ethernet/chelsio/libcxgb/libcxgb_ppm.c
index e2919005ead3..21034536c9c5 100644
--- a/drivers/net/ethernet/chelsio/libcxgb/libcxgb_ppm.c
+++ b/drivers/net/ethernet/chelsio/libcxgb/libcxgb_ppm.c
@@ -123,6 +123,9 @@ static int ppm_get_cpu_entries(struct cxgbi_ppm *ppm, unsigned int count,
unsigned int cpu;
int i;
+ if (!ppm->pool)
+ return -EINVAL;
+
cpu = get_cpu();
pool = per_cpu_ptr(ppm->pool, cpu);
spin_lock_bh(&pool->lock);
@@ -169,7 +172,9 @@ static int ppm_get_entries(struct cxgbi_ppm *ppm, unsigned int count,
}
ppm->next = i + count;
- if (ppm->next >= ppm->bmap_index_max)
+ if (ppm->max_index_in_edram && (ppm->next >= ppm->max_index_in_edram))
+ ppm->next = 0;
+ else if (ppm->next >= ppm->bmap_index_max)
ppm->next = 0;
spin_unlock_bh(&ppm->map_lock);
@@ -382,18 +387,36 @@ static struct cxgbi_ppm_pool *ppm_alloc_cpu_pool(unsigned int *total,
int cxgbi_ppm_init(void **ppm_pp, struct net_device *ndev,
struct pci_dev *pdev, void *lldev,
- struct cxgbi_tag_format *tformat,
- unsigned int ppmax,
- unsigned int llimit,
- unsigned int start,
- unsigned int reserve_factor)
+ struct cxgbi_tag_format *tformat, unsigned int iscsi_size,
+ unsigned int llimit, unsigned int start,
+ unsigned int reserve_factor, unsigned int iscsi_edram_start,
+ unsigned int iscsi_edram_size)
{
struct cxgbi_ppm *ppm = (struct cxgbi_ppm *)(*ppm_pp);
struct cxgbi_ppm_pool *pool = NULL;
- unsigned int ppmax_pool = 0;
unsigned int pool_index_max = 0;
- unsigned int alloc_sz;
+ unsigned int ppmax_pool = 0;
unsigned int ppod_bmap_size;
+ unsigned int alloc_sz;
+ unsigned int ppmax;
+
+ if (!iscsi_edram_start)
+ iscsi_edram_size = 0;
+
+ if (iscsi_edram_size &&
+ ((iscsi_edram_start + iscsi_edram_size) != start)) {
+ pr_err("iscsi ppod region not contiguous: EDRAM start 0x%x "
+ "size 0x%x DDR start 0x%x\n",
+ iscsi_edram_start, iscsi_edram_size, start);
+ return -EINVAL;
+ }
+
+ if (iscsi_edram_size) {
+ reserve_factor = 0;
+ start = iscsi_edram_start;
+ }
+
+ ppmax = (iscsi_edram_size + iscsi_size) >> PPOD_SIZE_SHIFT;
if (ppm) {
pr_info("ippm: %s, ppm 0x%p,0x%p already initialized, %u/%u.\n",
@@ -434,6 +457,14 @@ int cxgbi_ppm_init(void **ppm_pp, struct net_device *ndev,
__func__, ppmax, ppmax_pool, ppod_bmap_size, start,
end);
}
+ if (iscsi_edram_size) {
+ unsigned int first_ddr_idx =
+ iscsi_edram_size >> PPOD_SIZE_SHIFT;
+
+ ppm->max_index_in_edram = first_ddr_idx - 1;
+ bitmap_set(ppm->ppod_bmap, first_ddr_idx, 1);
+ pr_debug("reserved %u ppod in bitmap\n", first_ddr_idx);
+ }
spin_lock_init(&ppm->map_lock);
kref_init(&ppm->refcnt);
diff --git a/drivers/net/ethernet/chelsio/libcxgb/libcxgb_ppm.h b/drivers/net/ethernet/chelsio/libcxgb/libcxgb_ppm.h
index a91ad766cef0..7b02c200dd1e 100644
--- a/drivers/net/ethernet/chelsio/libcxgb/libcxgb_ppm.h
+++ b/drivers/net/ethernet/chelsio/libcxgb/libcxgb_ppm.h
@@ -143,6 +143,7 @@ struct cxgbi_ppm {
spinlock_t map_lock; /* ppm map lock */
unsigned int bmap_index_max;
unsigned int next;
+ unsigned int max_index_in_edram;
unsigned long *ppod_bmap;
struct cxgbi_ppod_data ppod_data[0];
};
@@ -324,9 +325,9 @@ int cxgbi_ppm_ppods_reserve(struct cxgbi_ppm *, unsigned short nr_pages,
unsigned long caller_data);
int cxgbi_ppm_init(void **ppm_pp, struct net_device *, struct pci_dev *,
void *lldev, struct cxgbi_tag_format *,
- unsigned int ppmax, unsigned int llimit,
- unsigned int start,
- unsigned int reserve_factor);
+ unsigned int iscsi_size, unsigned int llimit,
+ unsigned int start, unsigned int reserve_factor,
+ unsigned int edram_start, unsigned int edram_size);
int cxgbi_ppm_release(struct cxgbi_ppm *ppm);
void cxgbi_tagmask_check(unsigned int tagmask, struct cxgbi_tag_format *);
unsigned int cxgbi_tagmask_set(unsigned int ppmax);