lightnvm: pblk: unify vector max req constants

Both NVM_MAX_VLBA and PBLK_MAX_REQ_ADDRS define how many LBAs that
are available in a vector command. pblk uses them interchangeably
in its implementation. Use NVM_MAX_VLBA as the main one and remove
usages of PBLK_MAX_REQ_ADDRS.

Also remove the power representation that only has one user, and
instead calculate it at runtime.

Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Reviewed-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index 53bd521..9119c64 100644 (file)
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -376,12 +376,6 @@ static int pblk_core_init(struct pblk *pblk)
        pblk->max_write_pgs = min_t(int, max_write_ppas, NVM_MAX_VLBA);
        pblk_set_sec_per_write(pblk, pblk->min_write_pgs);
 
-       if (pblk->max_write_pgs > PBLK_MAX_REQ_ADDRS) {
-               pblk_err(pblk, "vector list too big(%u > %u)\n",
-                               pblk->max_write_pgs, PBLK_MAX_REQ_ADDRS);
-               return -EINVAL;
-       }
-
        pblk->pad_dist = kcalloc(pblk->min_write_pgs - 1, sizeof(atomic64_t),
                                                                GFP_KERNEL);
        if (!pblk->pad_dist)

diff --git a/drivers/lightnvm/pblk-read.c b/drivers/lightnvm/pblk-read.c
index 07b7f82..9c61c19 100644 (file)
--- a/drivers/lightnvm/pblk-read.c
+++ b/drivers/lightnvm/pblk-read.c
@@ -43,7 +43,7 @@ static void pblk_read_ppalist_rq(struct pblk *pblk, struct nvm_rq *rqd,
                                 unsigned long *read_bitmap)
 {
        struct pblk_sec_meta *meta_list = rqd->meta_list;
-       struct ppa_addr ppas[PBLK_MAX_REQ_ADDRS];
+       struct ppa_addr ppas[NVM_MAX_VLBA];
        int nr_secs = rqd->nr_ppas;
        bool advanced_bio = false;
        int i, j = 0;
@@ -450,7 +450,7 @@ int pblk_submit_read(struct pblk *pblk, struct bio *bio)
        int ret = NVM_IO_ERR;
 
        /* logic error: lba out-of-bounds. Ignore read request */
-       if (blba >= pblk->rl.nr_secs || nr_secs > PBLK_MAX_REQ_ADDRS) {
+       if (blba >= pblk->rl.nr_secs || nr_secs > NVM_MAX_VLBA) {
                WARN(1, "pblk: read lba out of bounds (lba:%llu, nr:%d)\n",
                                        (unsigned long long)blba, nr_secs);
                return NVM_IO_ERR;
@@ -547,7 +547,7 @@ static int read_ppalist_rq_gc(struct pblk *pblk, struct nvm_rq *rqd,
                              struct pblk_line *line, u64 *lba_list,
                              u64 *paddr_list_gc, unsigned int nr_secs)
 {
-       struct ppa_addr ppa_list_l2p[PBLK_MAX_REQ_ADDRS];
+       struct ppa_addr ppa_list_l2p[NVM_MAX_VLBA];
        struct ppa_addr ppa_gc;
        int valid_secs = 0;
        int i;

diff --git a/drivers/lightnvm/pblk-rl.c b/drivers/lightnvm/pblk-rl.c
index 6a0616a..a32790f 100644 (file)
--- a/drivers/lightnvm/pblk-rl.c
+++ b/drivers/lightnvm/pblk-rl.c
@@ -127,7 +127,7 @@ static void __pblk_rl_update_rates(struct pblk_rl *rl,
        } else if (free_blocks < rl->high) {
                int shift = rl->high_pw - rl->rb_windows_pw;
                int user_windows = free_blocks >> shift;
-               int user_max = user_windows << PBLK_MAX_REQ_ADDRS_PW;
+               int user_max = user_windows << ilog2(NVM_MAX_VLBA);
 
                rl->rb_user_max = user_max;
                rl->rb_gc_max = max - user_max;
@@ -228,7 +228,7 @@ void pblk_rl_init(struct pblk_rl *rl, int budget)
        rl->rsv_blocks = min_blocks;
 
        /* This will always be a power-of-2 */
-       rb_windows = budget / PBLK_MAX_REQ_ADDRS;
+       rb_windows = budget / NVM_MAX_VLBA;
        rl->rb_windows_pw = get_count_order(rb_windows);
 
        /* To start with, all buffer is available to user I/O writers */

diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h
index 579b4ea..64ae0c7 100644 (file)
--- a/drivers/lightnvm/pblk.h
+++ b/drivers/lightnvm/pblk.h
@@ -37,8 +37,6 @@
 
 #define PBLK_SECTOR (512)
 #define PBLK_EXPOSED_PAGE_SIZE (4096)
-#define PBLK_MAX_REQ_ADDRS (64)
-#define PBLK_MAX_REQ_ADDRS_PW (6)
 
 #define PBLK_NR_CLOSE_JOBS (4)
 
@@ -99,8 +97,8 @@ enum {
        PBLK_RL_LOW = 4
 };
 
-#define pblk_dma_meta_size (sizeof(struct pblk_sec_meta) * PBLK_MAX_REQ_ADDRS)
-#define pblk_dma_ppa_size (sizeof(u64) * PBLK_MAX_REQ_ADDRS)
+#define pblk_dma_meta_size (sizeof(struct pblk_sec_meta) * NVM_MAX_VLBA)
+#define pblk_dma_ppa_size (sizeof(u64) * NVM_MAX_VLBA)
 
 /* write buffer completion context */
 struct pblk_c_ctx {
@@ -218,8 +216,8 @@ struct pblk_lun {
 struct pblk_gc_rq {
        struct pblk_line *line;
        void *data;
-       u64 paddr_list[PBLK_MAX_REQ_ADDRS];
-       u64 lba_list[PBLK_MAX_REQ_ADDRS];
+       u64 paddr_list[NVM_MAX_VLBA];
+       u64 lba_list[NVM_MAX_VLBA];
        int nr_secs;
        int secs_to_gc;
        struct list_head list;